Load-sensitive overflow valve

A load-sensing and relief valve technology, applied in the hydraulic field, can solve problems such as energy waste, impact, poor life of seals and components, and achieve the effect of prolonging life and saving energy

Pending Publication Date: 2021-09-17
上海羿弓氢能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when the load is small, the system pressure is relatively small, because the relief valve parameters are set and will not change, the actual pressure of the system will still rise to the high pressure set by the relief valve, resulting in a lot of energy waste
The wasted energy is converted into heat energy, which makes the system temperature rise rapidly, thereby increasing the burden on the cooling system and causing another waste of energy
Moreover, the hydraulic system has been working under high temperature and high pressure conditions, which will have a negative impact on the life of seals and components.

Method used

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  • Load-sensitive overflow valve

Examples

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Embodiment 1

[0034] A load sensing relief valve such as figure 1 As shown, it includes valve body 1, valve seat nut 2, lock nut 3, valve seat 4, valve core 5, valve core sleeve 6, spring seat 7, spring 8, ejector rod 9, piston cylinder 10, piston rod 11 and end cap 12.

[0035] Inside the valve body 1, there is an inner hole along the axial direction of the valve body 1. The valve seat 4, the valve core 5 and the spring 8 are arranged in the inner hole in sequence. The valve seat 4 is connected to the valve body 1 with interference. A channel coaxial with the inner hole of the valve body 1 is provided in the center, and the valve seat 4 is axially positioned and vibration-proofed through the valve seat nut 2 and the lock nut 3 . The spool sleeve 6 acts as an axial guide for the spool 4, and the spring 8 presses on the spool 5 through the spring seat 7, and the opening pressure of the spool 5 is determined by the pressing force of the spring 8. The shape of the end surface of the valve co...

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PUM

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Abstract

The invention relates to a load-sensitive overflow valve which comprises a valve body, a valve seat, a valve element, a spring, an ejector rod, a piston cylinder, a piston rod and an end cover. The valve seat, the valve element and the spring are arranged in the valve body, the valve seat is in interference connection with the valve body, the valve element is pressed on the valve seat through the spring, the piston cylinder is connected to the end of the valve body, the end cover is connected with the piston cylinder, the ejector rod is connected with the spring and the piston rod, and the acting force of the piston rod and the ejector rod on the spring adjusts the pre-tightening force of the spring on the valve element, so that the opening pressure of the overflow valve is adjusted. Compared with the prior art, the pre-tightening force acting on the valve element changes along with the size of load, so that the opening pressure of the overflow valve is in positive correlation with the change of the load of a hydraulic system, the opening pressure and the load are kept within a small pressure difference range, and the overflow valve can automatically adjust the opening pressure of the valve element according to the load of the system, so that the purposes of saving energy, protecting system sealing pieces and prolonging the service life of system elements and parts are achieved.

Description

technical field [0001] The invention relates to the field of hydraulic pressure, in particular to a load-sensing overflow valve suitable for a wide range of load changes. Background technique [0002] In the field of hydraulic control, the overflow valve is an indispensable part of the hydraulic system. Its function is to protect the components in the hydraulic system, maintain the working pressure of the hydraulic system, and prevent it from being too high, so as not to damage the components. Spring, when the hydraulic oil pressure is greater than the system pressure, the spool is lifted by the hydraulic oil, and the hydraulic oil overflows from the system; when the hydraulic oil pressure is less than or equal to the system pressure, that is, the force exerted by the hydraulic oil on the spool is less than or equal to the spring When pressure is applied, the spool drops to form a seal against the seat. [0003] In the hydraulic system, there are application scenarios where...

Claims

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Application Information

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IPC IPC(8): F15B13/02
CPCF15B13/029
Inventor周金跃曹军马立瑞
Owner上海羿弓氢能科技有限公司