Hydraulic control loop for garbage truck

Abstract

The invention provides a hydraulic control loop for a garbage truck. The hydraulic control loop is composed of an oil source, an oil path integration block and an actuator. The oil source comprises a metering pump, an air cooler, a returned oil filter and other hydraulic auxiliary components. The oil path integration block comprises a high-pressure filter, an electromagnetic reversing valve, a balance valve and an overflow valve. The actuator comprises a feeding hydraulic cylinder set and a material pressing hydraulic cylinder set. The high-pressure filter, the electromagnetic reversing valve, the balance valve, the overflow valve, the feeding hydraulic cylinder set in the hydraulic oil source oil path integration block are sequentially connected through a pipeline to form a hopper feeding control loop, and are connected with the material pressing hydraulic cylinder set to form a material pressing control loop. According to the system, the number of the valves in the oil path integration block is reduced, the throttling loss is reduced, and the energy saving is achieved. A main oil path is internally provided with the high-pressure filter to guarantee cleanliness of oil liquid, and blockage of the valve is avoided. A returned oil path is provided with the air cooler, and heat dissipation of the system is improved. A hydraulic lock and a flow valve are replaced with the bi-directional balance valve, the self-locking function is achieved, and the stability of hopper moving of the garbage truck is guaranteed.

Description

technical field [0001] The invention relates to a hydraulic control circuit for a garbage truck, belonging to the technical field of hydraulic control systems. Background technique [0002] Garbage trucks are sanitation vehicles used to collect and transport garbage, and are used in municipal sanitation work and garbage transportation in factories and mines. Traditional garbage trucks require artificial filling, which is sent into the car body for compression. In recent years, with the wide application of computer technology, modern control theory, and electronic technology, garbage trucks have gradually become intelligent. Intelligent garbage trucks integrate garbage loading, compression, and transportation, and partially realize the automation of operation control, reducing unnecessary waste. of human intervention. [0003] The intelligent garbage truck is mainly composed of a car chassis, a carriage, a feeding mechanism, a pressing mechanism, and a hydraulic circuit con...

AI Technical Summary

Problems solved by technology

The circuit between the oil source and the actuator contains many directional valves and throttle valves to achieve different working conditions, but the number of valves is often set too much, resulting in a large throttling loss; the throttle valve is used as a back pressure valve. When the load changes greatly, the load pressure rises and the power consumption increases

[0006] 2. Serious oil pollution

Due to the harsh working environment of garbage trucks, pollutants can easily enter the oil circuit through the piston rod of the cylinder and the air filter, and the hydraulic oil is easily polluted. Severe oil pollution will cause the spool of the working valve to be stuck, causing the garbage truck unable to work properly

[0007] 3. The actuator does not move smoothly and has impact

Due to the negative load in the process of lifting and lowering the hopper, when the load capacity of the flow valve is exceeded, the operation of the hydraulic cylinder will be unstable, which may lead to overspeed and air suction.

[0008] 4. Poor cooling effect

The long-time working of the garbage truck makes the heat dissipation effect of the hydraulic system worse, and the seals are prone to failure, which may cause leakage and aggravate the wear between parts

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