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Isobaric type mechanical oil pump

A mechanical oil pump and equal pressure technology, applied in mechanical equipment, engine components, fuel injection pumps, etc., can solve problems such as oil pressure instability in high-pressure chambers, and achieve uniform force, good sealing effect, and small area effects

Pending Publication Date: 2018-01-12
JIANGSU CHANGFA AGRI EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oil return action of the existing equal pressure mechanical oil pump is continuous, which makes the oil pressure in the high pressure chamber unstable

Method used

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  • Isobaric type mechanical oil pump
  • Isobaric type mechanical oil pump
  • Isobaric type mechanical oil pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, this embodiment discloses an equal-pressure mechanical oil pump, including a pump body 100, an oil outlet valve connector 200, a plunger 310, a plunger sleeve 300, an oil outlet valve connector 200, an equal pressure valve spool assembly 400, As well as the oil outlet valve seat 500 , the oil inlet 110 is arranged on the pump body 100 , and the oil outlet 210 is arranged on the oil outlet valve joint 200 . The plunger sleeve 300, the oil outlet valve seat 500 and the oil outlet valve joint 200 are sequentially arranged in the pump body 100, the plunger 310 slides in the plunger sleeve 300, the plunger sleeve 300, the oil outlet valve seat 500 and the oil outlet A conductive internal oil passage is formed between the valve joints 200; the internal oil passage of the oil outlet valve joint 200 forms a first stepped surface 220; the plunger sleeve 300 is provided with an oil inlet hole 320, and fuel enters the pump body through the oil inlet 110 ...

Embodiment 2

[0043] On the basis of Embodiment 1, the contact surface between the oil outlet valve seat 500 joint and the oil outlet valve seat 500 is a rigid sealing surface, which can ensure that the inner hole of the oil passage of the oil outlet valve joint 200 and the upper surface of the oil outlet valve seat 500 The verticality requirements are met, so that the oil delivery valve spool 410 can slide smoothly on the oil delivery valve spool 410 , and the situation of being unable to sit due to the stuck placement occurs. Exemplarily, the joint of the oil outlet valve seat 500 is provided with a protrusion near the side of the oil outlet valve seat 500 , and the protrusion is a contact surface against the oil outlet valve seat 500 . And the shape of the ball seat 452 is T-shaped. Preferably, the plunger sleeve 300 is provided with a fourth stepped surface adjacent to the valve core 410 of the oil outlet valve, and a gasket 330 is arranged on the fourth stepped surface, and the oil out...

Embodiment 3

[0046] On the basis of Example 1, as image 3 with figure 1 As shown, the second through hole opened on the oil outlet valve spool includes a third section 411 and a fourth section 412, the radial dimension of the third section 411 is larger than that of the fourth section 412, the third section 411 and the fourth section 412 The junction forms a third stepped surface 413, and the third stepped surface 413 faces the side of the first stepped surface 220; part or all of the spring seat 440 is accommodated in the third section 411, and the outer diameter of the spring seat 440 is the same as that of the third section 411 is roughly equal.

[0047] Such as image 3 As shown, the oil outlet valve spool 410 includes a large diameter portion and a small diameter portion, and a shoulder portion 414 is formed between the large diameter portion and the small diameter portion. Extending to the internal oil circuit of the oil outlet valve seat 500; the oil outlet valve spring 420 exer...

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PUM

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Abstract

The invention discloses a mechanical oil pump for a diesel engine. The mechanical oil pump comprises a pump body, a plunger, a plunger sleeve, an oil outlet valve connector, an isobaric valve elementassembly and an oil outlet valve seat. A first step surface is formed on the oil outlet valve connector, the isobaric valve element assembly comprises an oil outlet valve element, an oil outlet valvespring, an isobaric valve spring, a spring seat and a sealing assembly, and the oil outlet valve element is slidably contained in the oil outlet valve seat and an inner oil way of the oil outlet valveconnector. The oil outlet valve spring and the spring seat are both located between the first step surface and the oil outlet valve element, and a second step surface is arranged on the spring seat and faces one side of the oil outlet valve element. The isobaric valve spring and the sealing assembly are located in a first section, the sealing assembly is located on the side adjacent to the secondstep surface, the isobaric valve spring exerts second elastic force towards the second step surface on the sealing assembly, and the second elastic force is matched with oil pressure to adjust the position of the sealing assembly so as to control opening and closing of a second section. The contact surface of the oil outlet valve connector and the oil outlet valve seat is a rigid sealing surface.The oil pressure in a high-pressure cavity can be stabilized.

Description

technical field [0001] The invention relates to the technical field of oil pumps, in particular to an equal-pressure mechanical oil pump. Background technique [0002] The diesel fuel supply system has a considerable influence on the performance of the diesel engine. The fuel injection pump is the oil supply device of the diesel engine. For the mechanical cam type diesel engine, the fuel injection pump is usually installed on the cam box of the diesel engine. . The fuel input to the fuel injection pump is pressurized, and injected into the cylinder of the diesel engine through the fuel injector to perform work by compression ignition. The oil return action of the existing equal-pressure mechanical oil pump is continuous, which makes the oil pressure in the high-pressure chamber unstable. Contents of the invention [0003] The purpose of the present invention is to provide an equal-pressure mechanical oil pump, which can stabilize the oil pressure in the high-pressure ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/02F02M59/46
Inventor 郑和瑞卞达谢峰戴军吴伟泽
Owner JIANGSU CHANGFA AGRI EQUIP