Oil cylinder reversing and volume speed adjusting hydraulic system

Abstract

The invention discloses an oil cylinder reversing and volume speed adjusting hydraulic system which is characterized in that a semi-closure hydraulic circuit is adopted; the hydraulic system comprises a prime motor (2b) capable of rotating bilaterally and a bilateral rotation hydraulic pump (3b); the speed of the prime motor (2b) is adjustable; the bilateral rotation hydraulic pump (3b) sucks oil from an oil tank B (1b); an oil inlet and an oil outlet of the bilateral rotation hydraulic pump (3b) are provided with a one-way valve A (4b) and a one-way valve B (5b) respectively; an oil port at one side of the bilateral rotation hydraulic pump (3b) is connected to a rod cavity of a double-acting cylinder (8b); an oil port at the other side of the bilateral rotation hydraulic pump (3b) is connected to a rodless cavity of the double-acting cylinder (8b) through a one-way valve (6b); and a hydraulic-control proportional throttle valve (7b) is arranged between an oil inlet way and an oil outlet way of the double-acting cylinder (8b). The micro hydraulic system is suitable for special-purpose minitype heavy load robots, the control is simplified, the transmission efficiency is improved, and the overall appearance and weight of the hydraulic system are reduced.

Description

technical field [0001] The invention belongs to the field of hydraulic pressure, and mainly relates to a hydraulic system for oil cylinder reversing and volume speed regulation, which is suitable for hydraulic drive of linear motion, such as special equipment such as small heavy-duty robots. Background technique [0002] In the traditional technology, when the actuator is an oil cylinder, the ordinary closed hydraulic circuit is not applicable because the flow in and out of the oil cylinder is not equal (unless the oil cylinders are used in pairs, or a double-outlet piston rod type oil cylinder is used), so the reversing and The speed regulation adopts an open hydraulic circuit. like figure 1 Shown is a typical oil cylinder reversing speed regulation circuit. The motor 2a drives the hydraulic pump 3a to rotate, and the hydraulic pump 3a sucks oil from the oil tank A1a. An electromagnetic unloading overflow valve 4a is installed at the outlet of the pump, which is used for...

AI Technical Summary

Problems solved by technology

This complicates the control, and at the same time reduces reliability and ease of maintenance due to the increase in auxiliary components

[0007] 2) Low transmission efficiency

But for miniature and small devices (such as small heavy-duty robots), the weight of these control elements and the space required for layout have a great impact on the shape and weight of the entire system, which will lead to a significant increase in the shape and weight of the system

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