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Hydraulic system and engineering machinery with same

A technology of hydraulic system and hydraulic pump, applied in mechanical equipment, spring mechanism, fluid pressure actuating device, etc., can solve the problem of consuming hydraulic energy of hydraulic system, and achieve the effect of improving energy saving effect

Active Publication Date: 2013-08-21
SANY AUTOMOBILE HOISTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the unloaded state, there is also the situation of consuming the hydraulic energy of the hydraulic system

Method used

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  • Hydraulic system and engineering machinery with same
  • Hydraulic system and engineering machinery with same
  • Hydraulic system and engineering machinery with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] In the first embodiment, for the convenience of installation, the load check valve 6.1 and the unload relief valve 6.2 can be integrated into an intermediate valve group 6 .

[0069] Please refer to figure 2 , which is a schematic diagram of the hydraulic principle of the hydraulic system provided in Embodiment 2 of the present invention. On the basis of Embodiment 1, in Embodiment 2 provided by the present invention, the first reversing valve group 2 may include two one-way valves: a first one-way valve 2.1 and a second one-way valve 2.2; two one-way valves The valves can be integrated in one valve body. Wherein, the oil inlet of the first check valve 2.1 can form the first oil inlet P21 of the first reversing valve group 2, and the oil inlet of the second check valve 2.2 can form the first oil inlet of the first reversing valve group 2. The second oil inlet P22; the oil outlet of the second one-way valve 2.2 communicates with the oil outlet of the first one-way val...

Embodiment 2

[0083] In the second embodiment, the hydraulic pump 1 may be a load-sensing hydraulic pump; corresponding to the load-sensing hydraulic pump, the hydraulic system further includes a load-sensing one-way valve 3.2. The load sensing check valve 3.2 can be integrated with the main directional valve 3.1 in one valve body 3 .

[0084] Please combine figure 2 , and refer to Figure 4 , Figure 4It is a schematic diagram of the connection between the load sensing check valve 3.2 and the main reversing valve 3.1 in the second embodiment of the present invention. The load sensing check valve 3.2 can be an existing poppet check valve corresponding to the load sensing hydraulic pump; in this embodiment, the load sensing check valve 3.2 is a hydraulically controlled two-position two-way valve; the oil inlet S3 At the same time, it communicates with the liquid control port above the load sensing check valve 3.2 and a working oil port. The oil outlet S4 communicates with the hydraulic ...

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PUM

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Abstract

The invention discloses a hydraulic system and engineering machinery with the hydraulic system. The hydraulic system comprises a first reversing valve bank and a second reversing valve bank. A first oil inlet of the first reversing valve bank is communicated with an oil discharge outlet of a hydraulic pump, and a working port is communicated with an oil inlet of a main reversing valve. An oil inlet of the second reversing valve bank is communicated with a first working port of the main reversing valve, a working port is communicated with a first working port of a hydraulic execute component, and an oil return port is communicated with a second oil inlet of the first reversing valve bank. Under the load conditions, in the first reversing valve bank, the first oil inlet and the working port are communicated, and in the second reversing valve bank, the oil inlet and the working port are communicated. Under the unload conditions, in the first reversing valve bank, the second oil inlet and the working port are communicated, and in the second reversing valve bank, the working port and the oil return port are communicated. According to the hydraulic system, cost is basically kept, and meanwhile the energy-saving effect of the hydraulic system under the unload conditions is further improved.

Description

technical field [0001] The invention relates to a hydraulic energy-saving technology, in particular to a hydraulic system and engineering machinery including the hydraulic system. Background technique [0002] Currently, the hydraulic system is commonly used as the power source of the winch system of the crane. The hydraulic system may include a main reversing valve and a hydraulic motor; the hydraulic motor is used as a hydraulic actuator of the hydraulic system to perform predetermined operations. The two working ports of the main reversing valve communicate with the two working ports of the hydraulic motor, and the output shaft of the hydraulic motor is connected with the reel. Changing the state of the main reversing valve can change the flow direction of the hydraulic oil, and then control the rotation direction of the hydraulic motor, so that the reel rotates in a predetermined direction, and realizes the control of the winch system. [0003] When the crane is perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/02F15B11/05F15B13/02F15B1/02B66D1/08
Inventor 陆晓兵李小飞潘辉
Owner SANY AUTOMOBILE HOISTING MACHINERY