Screw machine closed hydraulic system for shield machine and shield machine

A hydraulic system and closed-type technology, which is applied in the direction of fluid pressure actuation system safety, fluid pressure actuation system components, mechanical equipment, etc., and can solve problems such as numerous system pipelines, system pressure that cannot be adjusted, and system destructive power increase , to avoid the effect of system overheating

Pending Publication Date: 2021-04-06
JIANGSU KAIGONG TUNNEL MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented device is its ability to prevent harm from being done by another part or even damaging it during operation due to too much power usage caused by an electric motor used for driving one component on top of others.

Problems solved by technology

The technical problem addressed in this patents relates to improving the stability and performance of the hydrogen fuelled engine (HNG). Hydrogen gas accumulation occurs naturally over several hours while maintaining optimal efficiency. Additionally, there exist challenges such as prevention of damage caused by excess pressures and coolant leakage issues associated with conventional designs.

Method used

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  • Screw machine closed hydraulic system for shield machine and shield machine
  • Screw machine closed hydraulic system for shield machine and shield machine
  • Screw machine closed hydraulic system for shield machine and shield machine

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0035] like image 3 As shown, the present invention provides a shield machine, including a screw machine pump 1, a servo cylinder 3 and a screw machine closed hydraulic system for the shield machine. The screw machine pump 1 adopts axial variable plunger pump, and the motor power is 200KW. The pump model: A4VSG500HD1G / 30R-VZH35F684M is suitable for closed hydraulic system, and the pump displacement is 500cm 3, the screw machine pump 1 has its own charge pump 2 to provide hydraulic oil for the main pump, and the control mode of the screw machine pump 1 is hydraulic control HD1, such as Figure 4 As shown, the control mode is related to the pilot pressure. The pump displacement depends on the s

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Abstract

The invention provides a screw machine closed type hydraulic system for a shield machine and the shield machine. The screw machine closed type hydraulic system comprises a screw machine main pump loop connected with a screw machine pump (1), an oil supplementing oil path connected with an oil supplementing pump (2), a main pump control loop connected with a servo oil cylinder (3), and a control valve group connected with the screw machine main pump loop and the main pump control loop; and the servo oil cylinder (3) controls a swash plate of the screw machine pump (1). The screw machine closed type hydraulic system has the beneficial effects that the system can be protected against damage by releasing pressure to the other path when one path of high pressure of the main loop exists, meanwhile, redundant heat of the system can be brought back to an oil tank through the oil path on the low-pressure side, and pump damage caused by overheating of the system is avoided.

Description

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Claims

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Application Information

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Owner JIANGSU KAIGONG TUNNEL MACHINERY
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