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Overflow valve

An overflow valve and overflow technology, which is applied in control valves, safety valves, balance valves, etc., can solve the problems of insufficient, easy biting of oil sludge, complicated mechanism, etc., and achieve the effect of preventing intrusion

Inactive Publication Date: 2007-10-03
YAMADA SEISAKUSHO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In Patent Documents 1 and 2, it is not sufficient simply to orient the cylinder body sideways or horizontally from the viewpoint of preventing sludge from getting caught.
In addition, as disclosed in Patent Document 3, in the method of forming a concave portion on the inner peripheral surface of the cylinder bore by machining or the like, the sludge may sometimes reach the vicinity of the relief valve, and the sludge may easily bite due to various conditions. enter
In addition, as disclosed in Patent Document 4, in the method of providing a sludge removal mechanism on the relief valve itself, the mechanism becomes complicated and the number of parts increases.

Method used

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, in the present invention, the relief valve is mostly integrally formed in the pump housing of the oil pump or the like. The casing A is divided into a pump body and a pump cover. As shown in FIG. 1A, FIG. 6A, etc., a rotor chamber 1 is formed inside the casing A, and a rotor composed of an outer rotor provided with internal teeth and an inner rotor provided with external teeth is arranged in the rotor chamber 1. 100.

[0037] A suction port 2 and a discharge port 3 are formed in the rotor chamber 1 , and a discharge flow path 4 through which a discharge fluid from the discharge port 3 flows is formed. The discharge flow path 4 reaches the outside of the housing A described above. As shown in FIG. 1A, FIG. 6A, etc., a branch discharge flow path 41 is formed in the discharge flow path 4, and the branch discharge flow path 41 communicates with the relief valve of t...

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Abstract

A relief valve mounted on a pump such as an oil pump, for preventing pressure abnormality by allowing fluid to escape when a discharge fluid pressure reaches a predetermined set value, wherein influx of oil sludge into the valve can be prevented. The relief valve comprises: a valve housing; and a guide inflow path which is in the same direction as a slide direction of a valve main body that slides along a valve guide path of the valve housing under a predetermined pressure and which provides communication between a discharge flow path and the valve guide path. The valve guide path is arranged so that a relief opening part thereof is closed downwardly by the valve main body. The valve guide path and the guide inflow path are arranged above an orthogonal cross section of the discharge flow path.

Description

technical field [0001] The invention relates to a relief valve installed in oil pumps and other pumps. When the pressure of the discharged fluid reaches a predetermined set value, the fluid overflows so that the pressure will not reach abnormality. The relief valve can prevent the oil from The sludge in the pump penetrates into the pump. Background technique [0002] A relief valve is installed in pumps such as oil pumps. When the discharge oil (fluid) pressure of the pump reaches a certain set value, the valve body of the relief valve moves to overflow the oil through the outlet port arranged on the peripheral wall of the passageway of the cylinder body. [0003] The relief valve overcomes the oil pressure by the elastic force of the spring, and slides axially based on the oil pressure. However, at this time, when sludge (foreign matter) in the oil (fluid) bites into the relief valve or the spring, it may cause The operation of the relief valve is locked, or the operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/10
CPCF16K15/025Y10T137/7925F16K17/046
Inventor 远坂和郎梅泽善朗小野靖典
Owner YAMADA SEISAKUSHO KK