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Unloading pre-charging valve structure of hydraulic machine

A hydraulic press and pre-charging technology, which is applied to mechanical equipment, fluid pressure actuating devices, servo motor components, etc., can solve the problems of slow filling speed of disc-shaped pre-charging valve, large volume of pressure-holding cylinder, affecting production efficiency, etc. Achieve the effect of low mechanical strength requirements, improved pressure holding performance, and reduced failure rate

Pending Publication Date: 2018-08-28
HUZHOU VOCATIONAL TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disc-shaped pre-fill valve can basically meet the filling tasks of most hydraulic presses, but for extra-large presses, the pressure-holding cylinders are large in volume and quantity, and the instantaneous filling flow is extremely large. Slow, low pressure holding capacity, affecting production efficiency

Method used

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  • Unloading pre-charging valve structure of hydraulic machine
  • Unloading pre-charging valve structure of hydraulic machine

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Embodiment Construction

[0019] Such as figure 1 , 2 Shown: a hydraulic machine unloading pre-fill valve structure, which includes the main valve core 4, the limit spring 7, the main valve port 10, the upper end cover 2, the lower end cover 8 and the main valve 5, the upper end cover is fixed on the upper end of the main valve, The main valve core is assembled in the main valve, and the lower part of the main valve core controls the circulation and disconnection of the main valve port oil circuit through the limit spring, and the lower end cover is fixed on the lower end of the main valve.

[0020] The area of ​​the upper end surface of the main spool is larger than the area of ​​the lower end surface of the main spool, the outer ring of the main spool is provided with a sealing groove 3, the outside of the main valve is provided with a control oil port 11 and a ring of oil inlets 6, and there are eight oil inlets , the upper end cover is fixed on the upper end of the main valve by fixing bolts 1, an...

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Abstract

The invention relates to an unloading pre-charging valve structure of a hydraulic machine. The unloading pre-charging valve structure comprises a main valve element, a limiting spring, a main valve port, an upper end cover, a lower end cover and a main valve; the upper end cover is fixed at the upper end of the main valve, the main valve core is arranged in the main valve in an assembled mode, thelower part of the main valve core controls circulation and disconnection of a main valve port oil way through a limiting spring, and the lower end cover is fixed at the lower end of the main valve; the area of the upper end face of the main valve element is larger than that of the lower end face of the main valve element, and a sealing groove is formed in the outer ring of the main valve element;a control oil port and a circle of oil inlets are formed in the outer portion of the main valve, and at least six oil inlets are formed in the outer portion of the main valve; and the upper end coveris fixed at the upper end of the main valve through a fixing bolt, and the lower end cover is fixed at the lower end of the main valve through a fixing bolt. According to the unloading pre-charging valve structure, the problem that the instantaneous liquid filling flow is great is solved, and the working of a large hydraulic press is met.

Description

technical field [0001] The invention relates to a pre-fill valve structure, in particular to a hydraulic machine unloading pre-fill valve structure. Background technique [0002] The pre-fill valve is a hydraulically controlled one-way valve with a large flow rate, which is widely used in presses that require high pressure maintenance. In a large-scale hydraulic system, it is usually necessary to design a pressure-holding circuit (such as a variety of presses). The pressure-holding cylinder configured in a system with a pressure-holding circuit is relatively large. In order to improve work efficiency, it takes a short time to complete the pressure-holding cylinder. The task of filling liquid requires a large instantaneous flow rate in order to realize the rapid flow of oil in the tank to the pressure-holding cylinder, which is usually realized by a pre-fill valve in the design. In addition, the pre-fill valve also has the functions of pressure maintenance and quick pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
CPCF15B13/024
Inventor 何彦虎
Owner HUZHOU VOCATIONAL TECH COLLEGE
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