Hydraulic system of back cavity proportionality velocity modulation garbage disposal apparatus

Abstract

The utility model discloses a hydraulic system of a proportional speed-regulating garbage disposal device with a back cavity, which comprises a pushing oil cylinder and an oil tank; a back-cavity proportional speed-regulating circuit is arranged between the back cavity of the pushing oil cylinder and the oil cylinder; the back-cavity proportional speed-regulation circuit comprises a bridge-type return circuit composed of a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve; a proportional speed-regulating valve is arranged between the first one-way valve and the second one-way valve; a reversing valve is arranged between the bridge-type return circuit and the oil tank. The hydraulic system has a reasonable structure and ensures the stable operation of the oil cylinder at the normal crawl speed through a small-flow proportional speed-regulating valve. The return circuit is arranged in the return circuit of the back cavity of an executive oil cylinder and realizes proportional speed regulation through the bridge-type return circuit. The specification of the proportional speed-regulating valve is adopted on the basis of the flow required by the back cavity. The return circuit requirement of a large-flow proportional reversing valve can be satisfied through the small-flow proportional speed-regulating valve.

Description

Technical field: [0001] The invention relates to a hydraulic system of a garbage disposal device. Background technique: [0002] The hydraulic system of the garbage disposal device requires a large difference in the speed requirements of the actuator (cylinder) in the two directions, and the two-way speed is adjustable. Most of the current solutions are to use proportional directional valves that meet the flow rate. Due to the difference in the area of ​​the two chambers of the oil cylinder, the flow rate of the proportional reversing valve should be selected according to the required flow rate of the chamber. In the case that the rodless cavity requires rapid action, the flow difference between the two cavities is more obvious. According to the conventional design, a large-flow proportional directional valve is required, which is more expensive. And with the proportional reversing valve, the crawling phenomenon will occur when the cylinder speed is as low as the crawling speed. ...

AI Technical Summary

Problems solved by technology

In the case that the rodless cavity needs to move quickly, the flow difference between the two cavities is more obvious. According to the conventional design, a proportional directional valve with a large flow rate is required, and the price is relatively expensive.

And when the proportional reversing valve is used, the crawling phenomenon will occur when the cylinder speed is as low as the crawling speed

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