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Engine oil pump with pressure-limiting valve

A pressure limiting valve, oil pump technology, applied in the direction of pumps, pump components, rotary piston type/swing piston type pump components, etc., can solve the problem of damage to oil pressure gauges, oil pipe seals and other oil passage accessories, oil pump high pressure problems

Inactive Publication Date: 2008-12-10
陈杰余
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of use, we found that when the oil pump with integral embedded structure is running in the cold state of the main engine oil, the pumping pressure of the oil pump is often too high due to the high viscosity of the oil, causing damage to the oil pressure gauge, oil pipe, seals, etc. The phenomenon of oil passage accessories

Method used

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  • Engine oil pump with pressure-limiting valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An oil pump with a pressure limiting valve is composed of a pump casing 1, an inner rotor 5, an outer rotor 3, a shaft 4, a pump cover 2 and a pressure limiting valve. The tooth profiles of the inner rotor 5 and the outer rotor 3 are both cycloids, the inner rotor 5 is located inside the outer rotor 3, and the inner rotor 5 is fixed on the shaft 4 by pins. There is a certain eccentric distance between the axis lines of the inner rotor 5 and the outer rotor 3 , and the inner rotor 5 and the outer rotor 3 are installed in the pump casing 1 . The pump casing 1 is in the shape of a concave disc. There is a positioning boss at the opening end of the pump casing 1 body. The distribution plate is arranged on the inner surface of the pump cover 2. 2 The surface is slightly lower than the surface of the positioning boss. One end of the shaft 4 is supported in the shaft hole on the bottom surface of the pump casing 1, and the other end is supported in the center hole of the pump...

Embodiment 2

[0018] An oil pump with a pressure limiting valve is composed of a pump casing 1, an inner rotor 5, an outer rotor 3, a shaft 4, a pump cover 2 and a pressure limiting valve. The inner rotor 5 is located inside the outer rotor 3, and the inner rotor 5 is fixed on the shaft 4 by pins. There is a certain eccentric distance between the inner rotor 5 and the axis of the outer rotor 3. The inner rotor 5 and the outer rotor 3 are installed in the pump casing 1, and the pump casing 1 is in the shape of a concave disc. The distribution plate is arranged on the inner surface of the pump cover 2, and the pump cover 2 is embedded and fixed in the opening of the pump casing 1. The surface of the pump cover 2 is slightly higher than the end surface of the pump casing 1, forming a mounting boss. The surface of the pump cover 2 is provided with a groove, and the outer edge of the surface of the pump cover 2 is provided with a descending step lower than the surface of the pump cover. After th...

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Abstract

The invention discloses an oil pump with a limiting valve, which relates to an oil pump, in particular to an oil pump which is capable of controlling the maximum pump output pressure. The oil pump comprises a pump shell, an inner rotor, an outer rotor, a shaft and a pump cover; the inner rotor is arranged in the outer rotor and fixed on the shaft; certain eccentric distance is left between the axes of the inner and the outer rotors; the axes of the inner and the outer rotors are arranged in the pump shell; the pump shell is in a concave disc shape; a port plate is arranged on the inner side surface of the pump cover; the pump cover is embedded and fixed at the opening of the pump shell; one end of the shaft is borne in the central hole of the pump cover; the oil pump is characterized by further comprising a pressure limiting valve arranged in the pump; the inlet of the pressure limiting valve is connected with the high-pressure cavity of the port plate; the outlet of the pressure limiting valve is arranged on the end face of the pump, and in the junction surface between the pump and a host. The oil pump has the advantages that when the oil pressure of a mechanical lubricating system is too high, the pump can automatically overflow and relieve pressure, so as to prevent the oil circuit accessories from damage.

Description

technical field [0001] The invention relates to an engine oil pump, in particular to an engine oil pump capable of controlling the highest pumping pressure. Background technique [0002] Existing oil pumps are divided into two categories in terms of structure. The first category is a split superimposed structure. Type structure, the distribution plate is set on the pump cover, and the pump cover is embedded in the open end of the pump casing, such as the embedded oil pump with patent number ZL99230168.8, and the embedded machine with patent number ZL99230124.6 Oil pump, an internal meshing cycloidal gear pump with patent number ZL00216717.4 and an internal combustion engine oil pump with patent number ZL200410014460.6, etc. The oil pump with integral embedded structure solves the problems of serious oil leakage and low pumping pressure of the oil pump with split superimposed structure. However, in the process of use, we found that when the oil pump with integral embedded s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C15/00F04C2/10
Inventor 陈杰余
Owner 陈杰余