Closed hydraulic system and mechanical equipment

A technology for hydraulic systems and mechanical equipment, applied in the field of construction machinery, can solve problems such as overheating, reduce power loss, protect filters, and solve local overheating problems.

Active Publication Date: 2022-04-01
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a closed hydraulic system and mechanical equipment to solve the problem of local overheating caused by local circulation in the prior art

Method used

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  • Closed hydraulic system and mechanical equipment
  • Closed hydraulic system and mechanical equipment
  • Closed hydraulic system and mechanical equipment

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Embodiment Construction

[0042] 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.

[0043] figure 1 A schematic structural view of a closed hydraulic system in an embodiment of the present invention is schematically shown. Such as figure 1 As shown, in the embodiment of the present invention, a closed hydraulic system is provided, which is applied to mechanical equipment. The mechanical equipment may include an actuator. The closed hydraulic system may include: a closed pump 101 connected to the actuator, It is used to drive the actuator; the charge pump 102 is arranged on the passage between the closed pump 101 and the fuel tank, and is used to pump the oil in the fuel tank to the closed pump 101; the filter 103 is set between the charge pum...

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Abstract

The invention relates to the field of engineering machinery, and discloses a closed hydraulic system and mechanical equipment, the closed hydraulic system is applied to the mechanical equipment, and the closed hydraulic system comprises a closed pump connected with an execution mechanism and used for driving the execution mechanism; the oil supplementing pump is arranged on a passage between the closed pump and the oil tank and is used for pumping oil in the oil tank to the closed pump; the filter is arranged on a passage between the oil supplementing pump and the closed pump and is used for filtering oil output from the oil supplementing pump to the closed pump; the pressure control device comprises a first control cavity and a second control cavity, the first control cavity is communicated with the oil inlet of the filter, the second control cavity is communicated with the oil outlet of the filter, the oil inlet is communicated with the oil inlet of the filter, and the oil outlet is communicated with the oil tank; an oil inlet of the electromagnetic valve communicates with the second control cavity, and an oil outlet of the electromagnetic valve communicates with the oil tank; and the throttling element is arranged on a passage between the oil outlet of the filter and the oil inlet of the electromagnetic valve. The problem of local overheating is solved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a closed hydraulic system and mechanical equipment. Background technique [0002] Two types of hydraulic systems commonly used in mechanical equipment (eg, pumping equipment) are closed hydraulic systems and open hydraulic systems. In the closed hydraulic system, the oil returned from the oil cylinder returns to the oil pump, and the oil circulates in the oil circuit between the oil cylinder and the oil pump. In the case of no leakage, no external supplementary oil is required. But in fact, leakage is unavoidable. Therefore, a charge pump is usually set up in a closed hydraulic system to replenish oil in the closed circuit. [0003] The closed pump of the pumping equipment is a high-pressure heavy-duty hydraulic component, and there are precision components such as servo valves and servo cylinders inside, so it is sensitive to oil pollution, so a filter is required for the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/08F15B11/08F15B13/04F15B21/0423
Inventor 李沛林方旭东田翠云丁雪峰
Owner ZOOMLION HEAVY IND CO LTD
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