Double-winding hydraulic control system and engineering machine provided with same

A hydraulic control system and double hoisting technology, applied in mechanical equipment, fluid pressure actuating devices, servo motors, etc., can solve the problems of high cost, low efficiency and complex structure.

Active Publication Date: 2014-12-17
SHANGHAI ZOOMLION HEAVY IND PILING MACHINERYCO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned hydraulic control system is an open oil circuit with low efficiency
In addition, two sets of control handles and two proportiona

Method used

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  • Double-winding hydraulic control system and engineering machine provided with same
  • Double-winding hydraulic control system and engineering machine provided with same

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0026]The embodiment of the present invention provides a double hoist hydraulic control system, which includes a first hoist motor 10, a second hoist motor 12, and a closed hydraulic system that drives the first hoist motor 10 and the second hoist motor 12 to rotate. The pump 30 and the main reversing valve 20, the main reversing valve 20 includes an oil inlet, an oil return port and at least four working oil ports, the four working oil ports of the main reversing valve 20 are respectively the first working oil port, the second working oil port, the third working oil port and the fourth working oil port, the oil inlet port of the main selector valve 20 is connec...

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Abstract

The invention provides a double-winding hydraulic control system, which comprises a first winding motor (10), a second winding motor (12), a closed-type hydraulic pump (30) and a main reversing valve (20), wherein the main reversing valve (20) comprises an oil inlet, an oil-returning port, a first working oil port, a second working oil port, a third working oil port and a fourth working oil port, the oil inlet is communicated with the oil-outlet end of the closed-type hydraulic pump (30), the oil-returning port is communicated with the oil-inlet end of the closed-type hydraulic pump (30), the first working oil port and the second working oil port are connected to the two opposite ends of the first winding motor (10), and the third working oil port and the fourth working oil port are connected to the two opposite ends of the second winding motor (12). According to the hydraulic control system disclosed by the invention, the operation of the first winding motor and the second winding motor can be controlled only by the main reversing valve, so as to guarantee that only at most one winding motor rotates at the same time; the hydraulic control system has a simple structure; moreover, because hydraulic oil in a working oil path of a closed-type hydraulic system does not return an oil tank, the efficiency is improved.

Description

technical field [0001] The invention relates to the field of hydraulic control, in particular to a double winch hydraulic control system and construction machinery with the same. Background technique [0002] Many construction machinery (such as piling frames, ground-to-wall hydraulic grabs and other ground-to-wall slotting machines) have a main hoist and an auxiliary hoist at the same time, but the main hoist and the auxiliary hoist cannot work at the same time. [0003] like figure 1 as shown, figure 1 It is a double hoist hydraulic control system in the prior art, which adopts an open hydraulic circuit, and the open hydraulic pump 30' also has a variable adjustment mechanism 30a', which is used to adjust the displacement of the open hydraulic pump 30 in good time. The open hydraulic pump 30' provides pressure oil to drive the main hoist motor 10' and the auxiliary hoist motor 12' to rotate, wherein the main proportional reversing valve 20 is connected between the main h...

Claims

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Application Information

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IPC IPC(8): F15B11/08
Inventor 刘发民刘亮郑燕峰乔国华方东辉
Owner SHANGHAI ZOOMLION HEAVY IND PILING MACHINERYCO
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