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Generally speaking, a trash compactor functions with a large “ram” that compresses the trash down. The ram is a metal piece of that sits above the trash. The operator or user will load up the trash compactor with whatever applicable waste there is and once secured, will activate the ram and the compacting will begin.At a nominal working pressure of 3,000 psi, those two 6 in. bore cylinders can achieve maximum force over 80 tons combined. A capacity over 30 cubic yards in these larger trucks combined with more compaction force enables each one of those cubic yards to hold more raw waste.Once the waste is dumped, it is compacted by a hydraulically powered moving wall that oscillates backwards and forwards to push the waste to the rear of the vehicle. Most of the newer packing trucks have “pack-on-the-go hydraulics” which lets the driver pack loads while driving, allowing faster route times.

Contents

What is the force of a garbage truck compactor?

At a nominal working pressure of 3,000 psi, those two 6 in. bore cylinders can achieve maximum force over 80 tons combined. A capacity over 30 cubic yards in these larger trucks combined with more compaction force enables each one of those cubic yards to hold more raw waste.

How does the back of a garbage truck work?

Once the waste is dumped, it is compacted by a hydraulically powered moving wall that oscillates backwards and forwards to push the waste to the rear of the vehicle. Most of the newer packing trucks have “pack-on-the-go hydraulics” which lets the driver pack loads while driving, allowing faster route times.

Can you get crushed in a garbage truck?

When two men in Tallahassee, Florida were crushed inside of a garbage truck’s compactor in December 2016, the medical examiner documented numerous crush fractures in their faces, skulls, jaws, neck and ribs. One of the men, Anthony Todd, also had hemorrhaging in his eyes.

How many tons does a garbage truck hold?

On average, large dump trucks can carry roughly 28,000 pounds or about 14 tons. Smaller dump trucks can manage about 13,000 pounds to 15,000 pounds or 6.5 to 7.5 tons.

Are garbage trucks automatic or manual?

These types of trucks can be loaded either manually or automatically from the side. An Automated Side Loader or ASL is a garbage truck that has a mechanical arm with an automated lift that reaches out to the side of the truck and grabs a residential garbage container.

How fast can garbage trucks go?

The trucks, which store energy using liquid tanks, use a diesel motor to charge the tanks when the truck is first turned on and also to travel at speeds faster than 45 mph. Once the truck is moving, though, brake energy is stored in the tanks.

How do side loader garbage trucks work?

Side loaders are precisely what their name suggests. The hydraulic arm that lifts the waste container operates from the side. The arm varies in lifting capacity but can lift as much as 1,600 pounds in higher-end models. Disposal from the side is extremely useful in residential neighborhoods.

How do garbage disposals work?

When you turn on the disposal, a spinning disc, or impeller plate, turns rapidly, forcing the food waste against the outer wall of the grinding chamber. This pulverizes the food into tiny bits, which then get washed by water through holes in the chamber wall.

How many pounds of pressure does a garbage truck have?

The standard compactor truck (aka “garbage truck”) will crush anything at approximately 2,750 psi—enough pressure to pulverize a pickup truck—while its mechanical arms can lift up to 1,000 lbs.

How much hydraulic fluid does a garbage truck hold?

The standard hydraulic sump on a refuse truck holds 40 to 50 gallons, and the typical hydraulic system flows at a rate of at least 30 gallons per minute. Once a line is ruptured, it can take less than two minutes for all of the fluid to drain out of the system.

What is a hopper on a garbage truck?

Hopper – The part of a truck where waste is emptied into before it is compacted inside the container. Hydraulics – The mechanisms that compresses the garbage within the packer.

#how garbage trucks work How does the compression test garbage truck work?

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History[edit]

Types[edit]

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Bin tipper[edit]

How Does A Trash Compactor Work?

Now how do trash compactors work? If you make the decision to have one on your company property, it’s important that you understand how they work and exactly how you will be creating less waste. First we recommend to go through the manual of your specific compactor and read it entirely so that you understand your specific compactor well. Although all trash compactors and brands can and will be used differently, they all will generally work the same way. Generally speaking, a trash compactor functions with a large “ram” that compresses the trash down. The ram is a metal piece of that sits above the trash. The operator or user will load up the trash compactor with whatever applicable waste there is and once secured, will activate the ram and the compacting will begin. Trash compactors vary in size and ability but there are certain compactors that can and will hold up to one thousand gallons of waste! That’s a lot of trash! There are also various requirements as far as how you are to load and unload your trash compactor along with what items you should put in and in what order! Be sure to check your manufacturers handbook before you start using your compactor.

Hydraulics bring reliability and strength to waste management

Hydraulic cylinders and valves are common on refuse machinery, as they bring the rugged power for controlling, lifting, filling, compacting and dumping in the many types of refuse vehicles used.

By Josh Cosford, Contributing Editor

Waste management is an industry considered best operating in the wings, leaving the main stage orderly and immaculate. Sure, everyone sees a garbage truck occasionally, and you may even leave your city workers a Christmas present every winter. But few of us understand the path trash takes from our curb to either its place of reincarnation or place of final rest. And unless you’re the type of fluid power aficionado to be reading this article anyway, fewer people know how prolific hydraulics are in the waste management process.

Have you ever visited another state, province or country and seen a local piece of machinery seemingly designed on another planet? Dump trucks, concrete mixers and snowplows are often designed for and from regional preferences. Garbage trucks follow the regional recipe, so depending on municipal preferences, recycling requirements and the efforts of the salespersons offering products into that region, each locale may use a different machine.

The most common garbage truck (sometimes call a refuse truck), and the one most people think of, is the rear loader. The garbage is tossed into the gaping rear end and periodically compacted with what looks like a giant Hungry Hippo. It goes without saying these machines are heavily hydraulic powered, and these trucks indeed take advantage of hydraulic power density. The sweep blade and compactor action both use hydraulic cylinders. Older trucks required an operator’s thoughtful lever-operated directional control valve actuation to sweep and compact the trash. However, newer machines use either sequence valves or electronics to complete the action with one push of a lever or button.

Hydraulics provide maximum productivity for garbage trucks, not only regarding cycle time, but the quantity and compaction rate of the garbage itself. Compaction rate refers to the density of trash per cubic yard of capacity after the material is compacted. Compaction rate is a measurement of mass per volume of space, rather than a time component. It is dictated by a combination of body strength, hydraulic cylinder force and the surface area of the compactor. A higher compaction rate provides more compacted material per cubic yard, improving productivity.

With more powerful compaction from heavy-duty hydraulics, a garbage truck reduces the frequency in which it exits its route to dump the load. An economically priced garbage truck may offer a capacity of only about eight cubic yards. With lighter-duty hydraulics, these smaller machines may only compact those eight cubic yards to a density of 800 lb each. With just a 6,400 lb load capacity, a smaller truck needs to dump more frequently.

Larger, more expensive trucks employ larger sweep and compactor actuators, sometimes up to dual 6-in. bore cylinders. At a nominal working pressure of 3,000 psi, those two 6 in. bore cylinders can achieve maximum force over 80 tons combined. A capacity over 30 cubic yards in these larger trucks combined with more compaction force enables each one of those cubic yards to hold more raw waste. Instead of 800 lb per cubic yard, think more like 1,300 lb per cube. The large truck crams more garbage more effectively, now carrying over 39,000 lb each haul, vastly reducing dump frequency and thereby increasing productivity.

Although the body capacity and compaction rate vary, so too does the method of filling the body. Front-load trucks primarily service commercial customers, looking much like mastodons as their giant “tusks” lift dumpsters over their back to empty them into their open hopper. Front-load garbage trucks are often larger than some of the rear load counterparts, and with so much material to compress, they experience reduced compaction rate. Also, commercial waste tends to be filled with dense, mixed-media trash such as metal or wood, where residential garbage collected is primarily soft household waste.

The front and rear load trucks each operate using roughly the same number of actuators. The rear loader is equipped with sweep cylinders pulling the hopper trash up into the body where it’s compacted. In contrast, the front load truck uses two sets of cylinders each to operate the forks and arms. The arm cylinders are equipped with counterbalance valves, since the mass of the dumpster goes over-center, turning the tension load into a compression load.

The most recent truck to the game is the side loader garbage truck. This truck uses multiple cylinders to dump a standard-issue garbage bin into the truck’s side hopper. Hydraulic actuation extends the grapple mechanism (a surprising distance, sometimes), the grapple arms clamp the bin and drag it in flush to the truck where cylinders lift and dump the bin contents into the hopper. The hydraulic system works in reverse to lower and replace the bin to the curb. Electric valves operate the many cylinders used for the bin handling functions, and some modern machines employ automatic or semi-automatic bin dumping operation, vastly improving productivity.

We have all seen garbage trucks collecting trash, but so few of us have seen where they unload their less-than-precious cargo. Trash has to go somewhere, and that first somewhere is a transfer station. What nearly all garbage trucks share in operation is their method of dumping trash at the transfer station, where they operate as dump trucks. After unlocking their hydraulic tailgate latch cylinders, their large tailgates open using two hydraulic cylinders, looking much like a giant clamshell. Once the tailgate is high in the air, a telescopic cylinder tilts the body and dumps the trash into a pit where it is processed. Some trucks, however, use their compactors to push trash out the body and into the pit, although this method is less common.

The most advanced garbage trucks now take advantage of hydraulic hybrid technology. Rather than relying on the brute force from its diesel engine, a hydraulic pump/motor mounted to the transmission PTO both delivers and accepts hydraulic energy. When the vehicle slows for loading, the pump circuit sends fluid into a hydropneumatic accumulator to store energy. As the truck once again accelerates toward the next home, the pump switches to motor mode. The accumulator feeds its stored energy back to the system to supplement the diesel motor with a massive burst of torque. The hydraulic hybrid concept is ideally suited to the garbage truck’s repeated stop/start cycles in city waste collection.

Hydraulic machinery continues to play a part in the post-collection processing of trash, but how handling occurs depends on the municipal and local regulations. The transfer station likely puts sizeable front end loaders into action to process the unyielding inflow of garbage. The front end loader is a workhorse — quickly transitioning between forward and reverse movement, lifting and dumping trash as required. New loaders are optioned with electric hybridization, turning the wheel motors into regenerative brakes, similar to how the garbage trucks recoup energy, but this time storing them in batteries.

The two final destinations most common for waste are either incineration or landfill. For incinerated waste, a transfer station makes sense when built near the incinerator. Front end loaders fill staging area with waste fuel (garbage), where a giant crane equipped with a hydraulic grapple takes fistfuls of waste and dumps them into a gaping hopper. This hopper funnels the waste down below where hydraulic pushers send the waste into the burning inferno. Some incinerators power steam turbines to create electricity, while others burn the waste into dust.

For landfill waste, instead of fueling incinerators, large 53-ft trailers are filled for transportation to landfill sites. You’d correctly assume that landfill sites also count on hydraulic machinery. If the 53-ft trailer isn’t already capable of dumping with a humungous telescopic cylinder, then some trailers are parked upon platforms which themselves lift to dump the trailer while the semi-truck is still attached!

Thousands of tons of waste are processed at landfills every day, where a combination of loaders and dozers lift, push and spread the incoming garbage. Hydraulic equipment aids waste management every step of the way to take waste from your curb to its final resting place out of sight and out of mind. The power density, controllability and all-weather capability of fluid power perfectly suits the needs of the waste management industry.

Garbage truck

Vehicle designed to transport municipal solid waste

Not to be confused with Dump truck

“Trash truck” redirects here. For the Netflix streaming television series, see Trash Truck (TV series)

A garbage truck is a truck specially designed to collect municipal solid waste and transport it to a solid waste treatment facility, such as a landfill, recycling center or transfer station. In Australia they are commonly called rubbish trucks, or garbage trucks, while in the U.K. dustbin lorry or bin lorry is commonly used. Other common names for this type of truck include trash truck in the United States, and refuse truck, dustcart, junk truck, bin wagon or bin van elsewhere. Technical names include waste collection vehicle and refuse collection vehicle (RCV). These trucks are a common sight in most urban areas.

History [ edit ]
Thornycroft Steam Dust-Cart of 1897 with tipper body

Wagons and other means had been used for centuries to haul away solid waste. Among the first self-propelled garbage trucks were those ordered by Chiswick District Council from the Thornycroft Steam Wagon and Carriage Company in 1897 described as a steam motor tip-car, a new design of body specific for “the collection of dust and house refuse”.[1]
The 1920s saw the first open-topped trucks being used, but due to foul odors and waste falling from the back, covered vehicles soon became more common. These covered trucks were first introduced in more densely populated Europe and then in North America, but were soon used worldwide.

The main difficulty was that the waste collectors needed to lift the waste to shoulder height. The first technique developed in the late 1920s to solve this problem was to build round compartments with corkscrews that would lift the load and bring it away from the rear. A more efficient model was the development of the hopper in 1929. It used a cable system that could pull waste into the truck.

In 1937, George Dempster invented the Dempster-Dumpster system in which wheeled waste containers were mechanically tipped into the truck. His containers were known as Dumpsters, which led to the word dumpster entering the language.

In 1938, the Garwood Load Packer revolutionized the industry when including a compactor in the truck was implemented. The first compactor could double a truck’s capacity. This was made possible by use of a hydraulic press which periodically compacted the contents of the truck.

RS-3 Lightning Rear Steer truck

In 1955 the Dempster Dumpmaster, the first front loader, was introduced. They didn’t become common until the 1970s. The 1970s also saw the introduction of smaller dumpsters, often known as wheelie bins which were also emptied mechanically. Since that time there has been little dramatic change, although there have been various improvements to the compaction mechanisms to improve payload. In the mid-1970s Petersen Industries introduced the first grapple truck for municipal waste collection.

In 1969, the city of Scottsdale, Arizona introduced the world’s first automated side loader. The new truck could collect 300 gallon containers in 30 second cycles, without the driver exiting the cab.[2]
In 1997, Lee Rathbun introduced the Lightning Rear Steer System. This system includes an elevated, rear-facing cab for both driving the truck and operating the loader. This configuration allows the operator to follow behind haul trucks and load continuously.

Types [ edit ]
Front loaders [ edit ]
Front loaders generally service commercial and industrial businesses using large waste containers with lids known as Dumpsters in the US.[3] The truck is equipped with powered forks on the front which the driver carefully aligns with sleeves on the waste container using a joystick or a set of levers. The waste container is then lifted over the truck. Once it gets to the top the container is then flipped upside down and the waste or recyclable material is emptied into the vehicle’s hopper. Once the waste is dumped, it is compacted by a hydraulically powered moving wall that oscillates backwards and forwards to push the waste to the rear of the vehicle.[4]
Most of the newer packing trucks have “pack-on-the-go hydraulics” which lets the driver pack loads while driving, allowing faster route times.[5] When the body is full, the compaction wall moves all the way to the rear of the body, ejecting it via an open tailgate. There is also a system called the Curotto Can which is an attachment for a front loader that has an automated arm that functions as an automated side loader that allows the driver to dump carts.

3 rear load container serviced in Copenhagen 14.5 mrear load container serviced in Copenhagen

Garbagemen loading garbage by hand in Japan , 2013

Rear loaders [ edit ]
Rear loaders have an opening into a trough or hopper at the rear that a waste collector can throw waste bags or empty the contents of bins into. Often in many areas they have a lifting mechanism to automatically empty large carts without the operator having to lift the waste by hand.[6]
Another popular system for the rear loader is a rear load container specially built to fit a groove in the truck. The truck will have a chain or cable system for upending the container. The waste will then slide into the hopper of the truck.

The modern rear loader usually compacts the waste using a hydraulically powered mechanism that employs a moving plate or shovel to scoop the waste out from the loading hopper and compress it against a moving wall. In most compactor designs, the plate has a pointed edge (hence giving it the industry standard name packer blade) which is designed to apply point pressure to the waste to break down bulky items in the hopper before being drawn into the main body of the truck.

Compactor designs have been many and varied, however the two most popular in use today are the “sweep and slide” system (first pioneered on the Leach 2R Packmaster), where the packer blade pivots on a moving carriage which slides back and forth in large tracks fabricated into the body sides, and the “swing link” system (such as the Dempster Routechief) where the blade literally swings on a “pendulum”-style mechanism consisting of links which control the arc of the blade’s movement. The Geesink GPM series uses a pivoting packer blade which swings on an inverted U-shaped frame which lowers the blade into the hopper, where it sweeps the waste out; the frame then retracts back into the body to perform the compaction action. The Heil Colectomatic is a hybrid between the two philosophies- it used a combination of a lifting loading hopper and a pivoting sweeper blade to clear and compact waste in anticipation of the next load.

So-called “continuous” compactors were popular in the 1960s and 1970s. The German Shark design (later Rotopress) used a huge rotating drum fitted with spiral shaped paddles to draw waste in, and force it around an auger of decreasing pitch to compress it. SEMAT-Rey of France pioneered the rotating rake system (also used in the British Shelvoke and Drewry Revopak) to simultaneously shred and compress the waste as it is loaded. Other systems used a continuously rotating Archimedes’ screw to draw in waste and mutilate it inside the body. A mixture of safety concerns, and higher fuel consumption has seen a decline in the popularity of continuously compacting garbage trucks, with only the Rotopress design remaining in production due to its niche in being able to effectively deal with green waste for composting.

The wall will move towards the front of the vehicle as the pressure forces the hydraulic valves to open, or as the operator moves it with a manual control.

A unique rear-loading system involves a rear loader and a front-loading tractor (usually a Caterpillar front loader with a Tink Claw) for yard waste collection (and in some cities, garbage and recycling). The front loader picks up yard waste set in the street, and then loaded into the back of a rear loader. This system is used in several cities, including San Jose.

Side loaders [ edit ]
Side loaders are loaded from the side, either manually, or with the assistance of a joystick-controlled robotic arm with a claw, used to automatically lift and tip wheeled bins into the truck’s hopper.

Manual side loaders [ edit ]
A Lōdal Evo T-28 manual side loader

Manual side loaders (MSLs) feature a hopper in front of the body, similar to front loaders. Unlike front loaders, the actual hopper is very short, and sometimes is lower than the body, in order for the operator to dump the waste into the hopper. This also results in longer times for packing loads compared to rear loaders, although this can be offset by the time bringing waste to the truck. On some (but not all) vehicle models the hopper can be accessed from both sides, allowing two persons to collect waste from both sides of the street simultaneously and increasing vehicle efficiency.

Automated side loaders [ edit ]
A WhiteGMC WXLL/Heil Python automated side loader. Note the collection of two containers, as opposed to one.

Lift-equipped trucks are referred to as automated side loaders (ASLs). Similar to a front-end loader, the waste is compacted by an oscillating packer plate at the front of the loading hopper which forces the waste through an aperture into the main body and is therefore compacted towards the rear of the truck.[7]
An automated side loader only needs one operator, whereas a traditional rear load garbage truck may require two or three people,[8] and has the additional advantage of reducing on the job injuries due to repetitive heavy lifting. Due to these advantages, ASLs have become more popular than traditional manual collection. Typically an automated side loader uses standardized wheeled carts compatible with the truck’s automated lift.[9]
As with front loaders, the compaction mechanism comprises a metal pusher plate in the collection hopper which oscillates backwards and forwards under hydraulic pressure, pushing the refuse through an aperture, thus compacting it against the material already loaded. On some ASLs there is also a “folding” crusher plate positioned above the opening in the hopper, that folds down to crush bulky items within reach of the metal pusher plate. Another compactor design is the “paddle packer” which uses a paddle that rotates from side to side, forcing refuse into the body of the truck.

Manual/Automated side loaders [ edit ]
Manual/Automated side loaders (M/ASLs), are traditional MSLs equipped with an arm for automated collection, as well as continuously running packers. This allows for functionally identical to that of an ASL, while allowing for manual dumping of waste into hopper in instances where automated collection is not feasible, such as the collection of oversized items. In addition, M/ASLs provide a cheaper upgrade path for those who wish to keep preexisting MSLs for automated collection without paying for newer and more expensive ASLs.

Semi-automated side loaders [ edit ]
Semi-automated side loaders are MSLs that are equipped with an automated mechanism to lift and dump manually aligned waste containers into the hopper. The primary difference between semi-automated side loaders and ASLs is that while they still only need one person to operate, he or she must exit the cab to manually bring and align containers to the loading hopper on the side of the truck and dump them.[10]
Image gallery [ edit ]
Pneumatic collection [ edit ]
Volvo pneumatic collector used for “waste suction”

Pneumatic collection trucks have a crane with a tube and a mouthpiece that fits in a hole, usually hidden under a plate under the street. From here it will suck up waste from an underground installation. The system usually allows the driver to “pick up” the waste, even if the access is blocked by cars, snow or other barriers.

Grapple truck

Grapple trucks [ edit ]
Grapple trucks enable the collection of bulk waste. A large percentage of items in the solid waste stream are too large or too heavy to be safely lifted by hand into traditional garbage trucks. These items (furniture, large appliances, branches, logs) are called bulky waste or “oversized.” The preferred method for collecting these items is with a grapple truck. Grapple trucks have hydraulic knucklebooms, tipped with a clamshell bucket, and usually include a dump body or trailer.

Roll-offs are characterized by a rectangular footprint, utilizing wheels to facilitate rolling the dumpster in place. The container is designed to be transported by special roll-off trucks. They are relatively efficient for bulk loads of waste or extremely heavy loads of construction or demolition debris.[11]
Bin tipper [ edit ]
A bin tipper is a machine which mechanically lifts and inverts bins for the purpose of emptying them. They are often components of larger machines such as garbage trucks, or can be ‘standalone’ or mobile units.[12] Bin tippers usually have a steel frame, guarding and cradle, with a motor or crank-handle driving a lifting mechanism, which may be hydraulic or chain operated. Bins are placed into the machine, then lifted and inverted over the destination receptacle, allowing the contents to be emptied by gravity.

A side-load bin tipper was fitted to a garbage truck as early as 1929, by the Heil company in America. In the 1950s the Dempster Dumpmaster popularized the front-end loader variant, with bins being tipped over the cab of the truck. Both types of integrated bin tipper are now common on municipal refuse collection trucks. Standalone bin tippers developed later, with the release of a machine called the Simpro Ezi-Dump in 1990.

The use of bin tippers and other lifting aids has been stimulated in recent years by research linking heavy manual lifting with musculoskeletal disorders;[13][14] some government organisations,[15] schools[16] and companies now prohibit emptying bins by hand. Health and safety concerns have also driven the adoption of bin tippers in the manufacturing, food-processing and construction industries.[17]
See also [ edit ]
References [ edit ]

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Top 21 How A Garbage Truck Compactor Works 8014 Good Rating This Answer

What is the force of a garbage truck compactor?

How does the back of a garbage truck work?

Can you get crushed in a garbage truck?

How many tons does a garbage truck hold?

Are garbage trucks automatic or manual?

How fast can garbage trucks go?

How do side loader garbage trucks work?

How do garbage disposals work?

How many pounds of pressure does a garbage truck have?

How much hydraulic fluid does a garbage truck hold?

What is a hopper on a garbage truck?

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