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Rotary fuel-feed pump for diesel engine

A diesel engine and rotor-type technology, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems that the performance cannot meet the high-pressure fuel combination pump, the output performance limitation of the medium used, and the high-pressure fuel combination pump cannot meet the requirements.

Active Publication Date: 2013-05-01
JIANGSU JINHU FUEL FEED PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for high-pressure injection, the performance of the original plunger fuel delivery pump cannot meet the needs of the high-pressure fuel combination pump
The existing rotary pumps for engine lubricating oil cannot meet the requirements of high-pressure fuel combination pumps due to the difference in the medium used and the limitation of their own output performance.

Method used

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  • Rotary fuel-feed pump for diesel engine
  • Rotary fuel-feed pump for diesel engine
  • Rotary fuel-feed pump for diesel engine

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The basic structure of the diesel engine rotor type fuel delivery pump in this embodiment is as follows: figure 1 , figure 2 and image 3 shown. In the figure, 1 is the oil inlet screw sleeve, 2 is the sealing ring, 3-a and 3-b are the combined valve components, 4 is the spacer ring, 5 is the composite washer, 6 is the one-way valve spring, 7 is the steel ball, 8 is the Relief valve, 9 is the spring of the relief valve, 10 is the plug of the relief valve, 11 is the sealing ring, 12 is the gasket, 13 is the hand pump, 14 is the transmission shaft, 15 is the elastic retaining ring, 16 is the centripetal Ball bearings, 17 and 18 are double-lip skeleton oil seals, 19 is a needle roller bearing, 20 is a pump body, 21 is an outer rotor, 22 is an inner rotor, 23 is a sealing ring, 24 is a bolt, 25 is a circlip, 26 Is an end cap, and 27 is a flat key.

[0025] The same hand pump 13 as the prior art is housed on the pump body 20, the transmission shaft 14 of external power ...

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Abstract

The invention relates to a rotary fuel-feed pump for a diesel engine, which belongs to the technical field of fuel-feed pumps. A pump body of the fuel-feed pump is provided with a hand pump; a center hole of the pump body is provided with a driving shaft externally connected with a power source, one end of the driving shaft is fixedly connected with an inner rotor, and an external tooth of the inner rotor is meshed with an internal tooth of an outer rotor arranged in a stepped hole on the end part of the pump body to form a cycloidal gear pair; and the hole bottom of the stepped hole is manufactured with an oil-feed tank communicated with an oil-feed oil passage and an oil-discharge tank communicated with an oil-discharge oil passage respectively. Both theories and experiments can prove that compared with the prior art, the rotary fuel-feed pump for the diesel engine making use of the cycloidal gear pair can well meet the requirement of a high-pressure fuel combination pump no matter the fuel-feed pump is at a high rotating speed or a low rotating speed so as to create a condition for executing the national emission standard of the diesel engine.

Description

technical field [0001] The invention relates to an internal meshing cycloidal rotor pump, in particular to a diesel engine rotor type fuel delivery pump, which belongs to the technical field of fuel delivery pumps. Background technique [0002] As we all know, with the implementation of national emission standards for diesel engines, the low-pressure fuel injection of the original engine has been replaced by high-pressure injection. [0003] The high-pressure fuel combination pump that realizes high-pressure injection also puts forward new requirements for its diesel fuel delivery pump. As far as the applicant knows, for low-pressure injection, when the original plunger-type oil delivery pump is at low speed (50 rpm), it can provide the required amount of oil under a certain output pressure; at high speed (1100-1400 rpm) ), the oil quantity can also meet the requirement when outputting at the specified pressure. But for high-pressure injection, the performance of the origi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M37/16
Inventor 谢成龙黄爱源杨后松
Owner JIANGSU JINHU FUEL FEED PUMP
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