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Oil groove sealing structure of fuel injection pump body

A technology of sealing structure and fuel injection pump, which is applied in the direction of pump components, variable displacement pump components, liquid fuel engines, etc. It can solve the problems of thick riser, low pouring pass rate, and many raw materials consumed, so as to prevent oil tank Good oil leakage and sealing effect

Inactive Publication Date: 2013-01-16
CHONGQING BAIJI SIXING DIE CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing diesel fuel injection pump body is mainly produced by pouring, the pouring time is long, the efficiency is low, the riser of the pouring is thick and large, the consumption of raw materials is large, the passing rate of the pouring is low, and the shape is relatively rough

Method used

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  • Oil groove sealing structure of fuel injection pump body
  • Oil groove sealing structure of fuel injection pump body
  • Oil groove sealing structure of fuel injection pump body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: as figure 1 , figure 2 , image 3 and Figure 4 Shown: a fuel injection pump body oil groove sealing structure, including a fuel injection pump body 1 formed by die-casting aluminum alloy raw materials. After the oil tank 3 is core-pulled and demoulded, a core-pulling hole 5 will be formed on the tank wall opposite to the oil inlet hole 4 of the oil tank 3 .

[0015] The opening of the core-pulling hole 5 is square, and a step 6 is formed in the core-pulling hole 5. The angle between the step 6 and the wall of the core-pulling hole 5 is less than 90°, and the fluorine rubber sealing ring 7 is inserted into the angle; The core-pulling hole 5 is equipped with a plug 8 matching the step 6 , the plug 8 is a square aluminum alloy block, and the plug 8 is interference-fitted with the core-pulling hole 5 .

[0016] The step 6 of the core-pulling hole 5 can be a single-layer step, a double-layer step or a multi-layer step, and the plug 8 can be a flat squar...

Embodiment 2

[0017] Embodiment 2: The difference from Embodiment 1 is that the angle between the step 6 and the wall of the core-pulling hole 5 is filled with sealant, and other features are the same as Embodiment 1.

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Abstract

The invention discloses an oil groove sealing structure of a fuel injection pump body. The oil groove sealing structure comprises a die-casting molded fuel injection pump body, a plunger hole is arranged at the top end of the pump body, an oil groove is arranged under the plunger hole, an oil inlet and a core pulling hole are opened on two opposite groove walls of the oil groove respectively, a step is formed in the hole of the core pulling hole, a plug matched with the step is arranged in the core pulling hole, and the plug and the core pulling hole are in interference fit. According to the oil groove sealing structure of the fuel injection pump body, the sealing effect is good, and oil leakage of the oil groove can be prevented.

Description

technical field [0001] The invention relates to a sealing structure, in particular to an oil groove sealing structure of a fuel injection pump body formed by die-casting. Background technique [0002] The existing diesel fuel injection pump body is mainly produced by pouring, which takes a long time and has low efficiency. The pouring riser is thick and consumes a lot of raw materials, and the casting pass rate is low and the shape is relatively rough. In order to overcome the above problems, some manufacturers switch to die-casting to produce fuel injection pump bodies, which improves production efficiency and product qualification rate, and reduces raw material loss. [0003] But the existing fuel injection pump body die-casting mold will form a core-pulling hole opposite to the oil inlet hole of the oil tank of the pump body after core-pulling. This redundant core-pulling hole needs to be sealed to prevent the oil tank from leaking. Contents of the invention [0004] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/00F04B53/16
Inventor 冉志刚沈成溜
Owner CHONGQING BAIJI SIXING DIE CASTING
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