CN207393364U - A kind of mechanical oil pump - Google Patents
A kind of mechanical oil pump Download PDFInfo
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- CN207393364U CN207393364U CN201721371219.8U CN201721371219U CN207393364U CN 207393364 U CN207393364 U CN 207393364U CN 201721371219 U CN201721371219 U CN 201721371219U CN 207393364 U CN207393364 U CN 207393364U
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- outlet valve
- oil
- oil outlet
- valve seat
- plunger
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Abstract
The utility model discloses a kind of mechanical oil pumps, are arranged on including the pump housing, discharge outlet, plunger, plunger bushing, fuel-displaced valve core, spring and delivery valve seat, oil inlet on the pump housing, oil outlet is arranged on discharge outlet；Wherein, plunger bushing, delivery valve seat and discharge outlet are arranged in the pump housing successively, and plunger slides in plunger bushing, and the internal oil passages of conducting are formed between plunger bushing, delivery valve seat and discharge outlet；The internal oil passages of discharge outlet form First terrace；Fuel feed hole is provided on plunger bushing；Fuel-displaced valve core slip is placed in the internal oil passages of delivery valve seat and discharge outlet, and fuel-displaced valve core offers first through hole；First spring is between First terrace and fuel-displaced valve core；Plunger bushing is provided with second step face closing on fuel-displaced valve core one side, a gasket is disposed on second step face, delivery valve seat is abutted against to gasket.The sealing performance of mechanical oil pump is improved, avoids the problem that high pressure oil can not be formed.
Description
Technical Field
The utility model relates to an oil pump technical field, concretely designs a mechanical oil pump.
Background
Diesel fuel delivery systems have a considerable impact on the performance of diesel engines. The oil injection pump is an oil supply device of a diesel engine, the oil injection pump is usually installed on a cam box of the diesel engine, and the rotation of a cam shaft drives the guide piston assembly to reciprocate, so that the plunger is driven to move up and down to supply oil. Fuel oil input into the fuel injection pump is pressurized and injected into a cylinder of the diesel engine through a fuel injector to perform compression ignition work. The existing fuel injection pump structure generally comprises a plunger sleeve, an oil outlet valve seat and an oil outlet valve joint which are sequentially arranged in a pump body, a plunger slides in the plunger sleeve, and a communicated internal oil circuit is formed among the plunger sleeve, the oil outlet valve seat and the oil outlet valve joint; the oil outlet valve core is accommodated in the oil outlet valve seat and the inner oil way of the oil outlet valve joint in a sliding manner.
The oil outlet valve core needs to slide in the internal oil ways of the two parts of the oil outlet valve seat and the oil outlet valve joint, and the problems that the oil outlet valve core cannot normally seat after rising due to poor perpendicularity between the upper surface of the oil outlet valve seat and the internal oil way of the oil outlet valve joint caused by poor perpendicularity between the plunger sleeve mounting plane and the thread center in the conventional structure finally result in poor sealing, and high-pressure oil cannot form and the like are often caused.
Disclosure of Invention
The utility model aims at providing a mechanical oil pump improves mechanical oil pump's sealing performance, avoids the unable problem that forms of high pressure oil.
The utility model provides a technical scheme as follows: a mechanical oil pump comprises a pump body, a plunger sleeve, an oil outlet valve joint, an oil outlet valve core, a spring and an oil outlet valve seat, wherein an oil inlet is formed in the pump body, and an oil outlet is formed in the oil outlet valve joint; wherein,
the plunger sleeve, the oil outlet valve seat and the oil outlet valve joint are sequentially arranged in the pump body, the plunger slides in the plunger sleeve, and a communicated internal oil circuit is formed among the plunger sleeve, the oil outlet valve seat and the oil outlet valve joint; the internal oil path of the oil outlet valve joint forms a first step surface; an oil inlet hole is formed in the plunger sleeve; the oil outlet valve core is accommodated in the oil outlet valve seat and the inner oil way of the oil outlet valve joint in a sliding manner, and is provided with a first through hole; the first spring is positioned between the first step surface and the oil outlet valve core;
the plunger sleeve is provided with a second step surface close to one side of the oil outlet valve core, a sealing gasket is arranged on the second step surface, and the oil outlet valve seat is abutted to the sealing gasket.
This technical scheme, sealed the pad is soft, can compensate the not good condition of straightness that hangs down of cylinder plug cover mounting plane and screw thread center in the pump body through the different deformations of sealed each part of filling up when guaranteeing to seal, and then prevents the not good problem of straightness that hangs down of the inside oil circuit that produces oil valve seat upper surface and the joint for the play oil valve case can smooth and easy slip, places the jamming and leads to the unable condition of taking a seat to take place.
Specifically, the contact surface of the oil outlet valve joint and the oil outlet valve seat is a rigid sealing surface.
This technical scheme can guarantee the straightness requirement that hangs down between the oil circuit hole that goes out the oil valve joint and the play oil valve seat upper surface to make the play oil valve case can be in the smooth and easy slip of play oil valve case, place the jamming and lead to the condition emergence that can't take a seat.
Specifically, the oil outlet valve joint is close to one side of the oil outlet valve seat is provided with a convex part, and the convex part is a contact surface abutted against the oil outlet valve seat.
According to the technical scheme, the convex part is arranged on the oil outlet valve joint and serves as a rigid sealing surface, so that the area of the sealing surface can be reduced, the cost is reduced, the processing difficulty is reduced, and the sealing effect is better guaranteed.
Specifically, the sealing gasket is a copper gasket.
Specifically, a first opening and a second opening are formed in the pump body; the plunger sleeve is hermetically arranged at the first opening and is accommodated in the pump body; the plunger is arranged in the plunger sleeve in a sealing and sliding manner; the oil outlet valve is arranged at the second opening in a sealing mode, and the oil outlet valve seat is located between the oil outlet valve joint and the plunger sleeve and is clamped and fixed.
The utility model provides a pair of mechanical oil pump can bring following at least one beneficial effect:
1. the sealed pad is soft, can compensate the not good condition of straightness that hangs down of cylinder plug cover mounting plane and screw thread center in the pump body when guaranteeing to seal through the different deformations of sealed each part of filling up, and then prevents to appear the not good problem of straightness that hangs down of inside oil circuit that the disk seat upper surface that produces oil and the delivery valve connect for the smooth and easy slip of delivery valve case prevents the jamming and leads to the condition emergence that can't take a seat.
2. The contact surface of the oil outlet valve joint and the oil outlet valve seat is a rigid sealing surface. The verticality requirement between the oil way inner hole of the oil outlet valve joint and the upper surface of the oil outlet valve seat can be ensured, so that the oil outlet valve core can smoothly slide on the oil outlet valve core, and the condition that the oil outlet valve core cannot be seated due to clamping stagnation is prevented.
3. The convex part is arranged on the oil outlet valve joint and serves as a rigid sealing surface, so that the area of the sealing surface can be reduced, the cost is reduced, the processing difficulty is reduced, and the sealing effect is better ensured.
Drawings
The above features, technical characteristics, advantages and modes of realisation of the mechanical oil pump will be further described in the following, in a clearly understandable manner, with reference to the accompanying drawings, which illustrate preferred embodiments.
Fig. 1 is an overall structural view of the mechanical oil pump of the present invention.
FIG. 2 is an overall block diagram of the spring seat, second spring and seal assembly.
Fig. 3 is a structural view of the spool of the oil outlet valve.
The reference numbers illustrate: 100. the oil outlet valve comprises a pump body, 110, an oil inlet, 120, a first opening, 130, a second opening, 200, an oil outlet valve joint, 210, an oil outlet, 220, a first step surface, 300, a plunger sleeve, 310, a plunger, 320, an oil inlet hole, 330, a sealing gasket, 400, a valve core assembly, 410, an oil outlet valve core, 411, a third section, 412, a fourth section, 413, a third step surface, 414, a shaft shoulder portion, 420, a first spring, 430, a second spring, 440, a spring seat, 441, a first section, 442, a second section, 443, a fourth step surface, 450, a sealing assembly, 451, a rigid ball, 452, a ball seat, 500 and an oil outlet valve seat.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure of the product.
Example one
As shown in fig. 1, the present embodiment discloses a mechanical oil pump, which includes a pump body 100, an oil outlet valve joint 200, a plunger 310, a plunger sleeve 300, an oil outlet valve joint 200, a valve core assembly 400, and an oil outlet valve seat 500, wherein an oil inlet 110 is disposed on the pump body 100, and an oil outlet 210 is disposed 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, and a communicated internal oil way is formed among the plunger sleeve 300, the oil outlet valve seat 500 and the oil outlet valve joint 200; the internal oil passage of the oil outlet valve joint 200 forms a first step surface 220; the plunger sleeve 300 is provided with an oil inlet hole 320, and fuel enters the pump body 100 through the oil inlet 110 and then enters the plunger sleeve 300 through the oil inlet hole 320. The oil inlet hole 320 may be closed when the plunger 310 is advanced to the corresponding position.
The spool assembly 400 includes an outlet valve spool 410, a first spring 420, a second spring 430, a spring seat 440, and a seal assembly 450; the oil outlet valve core 410 is slidably accommodated in the oil outlet valve seat 500 and the internal oil path of the oil outlet valve joint 200, and the oil outlet valve core 410 is provided with a first through hole; the first spring 420 is located between the first step surface 220 and the outlet valve spool 410; the spring seat 440 is located between the first step surface 220 and the outlet valve spool 410.
As shown in fig. 1 and 2, the spring seat 440 is provided with a second through hole, the second through hole includes a first section 441 and a second section 442, the radial dimension of the first section 441 is greater than that of the second section 442, a fourth step surface 443 is formed at the joint of the first section 441 and the second section 442, and the fourth step surface 443 faces the oil outlet valve spool 410 side; the second spring 430 and the sealing member 450 are located in the first section 441, the sealing member 450 is located at a side close to the fourth step surface 443, the second spring 430 applies a second elastic force to the sealing member 450 toward the fourth step surface 443, and the second elastic force adjusts the position of the sealing member 450 in cooperation with the oil pressure to control the opening and closing of the second section 442; a high pressure chamber is formed between the oil outlet valve joint 200 and the oil outlet valve seat 500, and a low pressure chamber is formed between the pump body 100 and the oil outlet valve seat 500 and the oil outlet valve joint 200.
When the pressure of the high-pressure fuel is larger than the pretightening force of the first spring 420, the high-pressure fuel pushes the valve core 410 of the oil outlet valve to advance and then enter a high-pressure cavity, and then enters the oil injector through a high-pressure oil pipe.
In the oil return state, when the pressure of the fuel in the high pressure chamber is greater than the pre-tightening force of the second spring 430, the second spring 430 is further compressed to separate the sealing assembly 450 from the fourth step surface 443, so that the second section 442 of the second through hole is conducted, and the fuel flows back to the low pressure chamber through the second through hole of the spring seat 440 and the first through hole of the valve element. As the pressure of the fuel in the high pressure chamber decreases, when the pressure of the fuel decreases to be equal to the elastic force of the second spring 430, the second spring 430 pushes the sealing assembly 450 to rebound to close the second section 442, and the oil return operation is completed. By the resilient force of the second spring 430, stable control of the oil pressure in the high-pressure chamber is finally achieved.
Further preferably, as shown in fig. 2, the sealing assembly 450 includes a steel ball 451 and a ball seat 452, wherein the steel ball 451 is located adjacent to a side of the fourth step surface 443 to open or close the second section 442, the ball seat 452 is located between the steel ball 451 and the second spring 430, and a radial dimension of the ball seat 452 is substantially equal to that of the first section 441.
Example two
On the basis of the first embodiment, the contact surface between the joint of the oil outlet valve seat 500 and the oil outlet valve seat 500 is a rigid sealing surface, which can ensure the verticality requirement between the inner hole of the oil path of the oil outlet valve joint 200 and the upper surface of the oil outlet valve seat 500, so that the oil outlet valve core 410 can smoothly slide on the oil outlet valve core 410, and the oil outlet valve core 410 cannot be seated due to clamping stagnation. For example, a convex portion is disposed at a side of the joint of the oil outlet valve seat 500, which is close to the oil outlet valve seat 500, and the convex portion is a contact surface against the oil outlet valve seat 500. And ball seat 452 is T-shaped. Preferably, the plunger sleeve 300 is provided with a second step surface on a side adjacent to the outlet valve spool 410, a gasket 330 is disposed on the second step surface, and the outlet valve seat 500 abuts against the gasket 330.
This technical scheme, sealed pad 330 is soft, can compensate the not good condition of straightness that hangs down of cylinder plug cover 300 mounting plane and screw thread center in the pump body 100 through the different deformations of sealed pad 330 each part when guaranteeing to seal, and then prevents to appear the not good problem of straightness that hangs down of the inside oil circuit of the oil outlet valve seat 500 upper surface and oil outlet valve joint 200 for oil outlet valve case 410 can smooth and easy slip, places the jamming and leads to the condition emergence that can't take a seat. Illustratively, the gasket 330 is a copper gasket.
EXAMPLE III
On the basis of the first embodiment, as shown in fig. 3 and fig. 1, the first through hole formed in the spool of the oil outlet valve includes a third section 411 and a fourth section 412, the radial dimension of the third section 411 is greater than that of the fourth section 412, a third step surface 413 is formed at the joint of the third section 411 and the fourth section 412, and the third step surface 413 faces one side of the first step surface 220; a portion or all of the spring seat 440 is received within the third section 411, and the outer diameter of the spring seat 440 is substantially equal to the third section 411.
As shown in fig. 3, the outlet valve spool 410 includes a large diameter portion and a small diameter portion, a shaft shoulder portion 414 is formed between the large diameter portion and the small diameter portion, the large diameter portion is slidably disposed in the internal oil passage of the outlet valve joint 200, and the small diameter portion extends to the internal oil passage of the outlet valve seat 500; the first spring 420 applies a first elastic force to the outlet valve spool 410 away from the first step surface 220, and the first elastic force adjusts the position of the outlet valve spool 410 in accordance with the oil pressure so that the shaft shoulder portion 414 controls opening and closing of the oil passage inside the outlet valve seat 500. When the pressure of the high-pressure fuel is larger than the pretightening force of the first spring 420, the valve core 410 of the oil outlet valve is separated from the oil outlet valve seat 500, and the high-pressure fuel enters a high-pressure cavity from a gap between the high-pressure fuel and the oil outlet valve seat and then enters the oil injector through a high-pressure oil pipe.
Illustratively, the shaft shoulder 414 engages the large and small diameters in a beveled transition. The shaft shoulder 414 is an inclined surface, and the shaft shoulder 414 and the oil outlet valve seat 500 are sealed in a line contact manner, so that the line seal area is small compared with a surface seal area, the pressure is high, the area directly playing a sealing role is small, the processing quality is easy to ensure, and a better sealing effect can be obtained.
On the basis of the first or second embodiment, the pump body 100 is provided with a first opening 120 and a second opening 130; the plunger sleeve 300 is hermetically installed at the first opening 120 and is accommodated in the pump body 100; the plunger 310 is hermetically and slidably arranged in the plunger sleeve 300; the oil outlet valve is hermetically installed at the second opening 130, and the oil outlet valve seat 500 is located between the oil outlet valve joint 200 and the plunger sleeve 300 and is clamped and fixed.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A mechanical oil pump is characterized by comprising a pump body, an oil outlet valve joint, a plunger sleeve, an oil outlet valve core, a spring and an oil outlet valve seat, wherein an oil inlet of the mechanical oil pump is arranged on the pump body, and an oil outlet of the mechanical oil pump is arranged on the oil outlet valve joint; wherein,
the plunger sleeve, the oil outlet valve seat and the oil outlet valve joint are sequentially arranged in the pump body, the plunger slides in the plunger sleeve, and a communicated internal oil circuit is formed among the plunger sleeve, the oil outlet valve seat and the oil outlet valve joint; the internal oil path of the oil outlet valve joint forms a first step surface; an oil inlet hole is formed in the plunger sleeve; the oil outlet valve core is accommodated in the oil outlet valve seat and the inner oil way of the oil outlet valve joint in a sliding manner, and is provided with a first through hole; the spring is positioned between the first step surface and the valve core of the oil outlet valve;
the plunger sleeve is provided with a second step surface close to one side of the oil outlet valve core, a sealing gasket is arranged on the second step surface, and the oil outlet valve seat is abutted to the sealing gasket.
2. The mechanical oil pump according to claim 1, wherein a contact surface of the outlet valve joint with the outlet valve seat is a rigid seal surface.
3. The mechanical oil pump according to claim 2, wherein a side of the oil outlet valve joint adjacent to the oil outlet valve seat is provided with a convex portion, and the convex portion is a contact surface against which the oil outlet valve seat abuts.
4. The mechanical oil pump according to any one of claims 1 to 3, wherein the seal is a copper gasket.
5. The mechanical oil pump according to claim 4, characterized in that: the pump body is provided with a first opening and a second opening; the plunger sleeve is hermetically arranged at the first opening and is accommodated in the pump body; the plunger is arranged in the plunger sleeve in a sealing and sliding manner; the oil outlet valve is arranged at the second opening in a sealing mode, and the oil outlet valve seat is located between the oil outlet valve joint and the plunger sleeve and is clamped and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721371219.8U CN207393364U (en) | 2017-10-20 | 2017-10-20 | A kind of mechanical oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721371219.8U CN207393364U (en) | 2017-10-20 | 2017-10-20 | A kind of mechanical oil pump |
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| Publication Number | Publication Date |
|---|---|
| CN207393364U true CN207393364U (en) | 2018-05-22 |
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| CN201721371219.8U Active CN207393364U (en) | 2017-10-20 | 2017-10-20 | A kind of mechanical oil pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837767A (en) * | 2021-01-30 | 2022-08-02 | 江苏常发农业装备股份有限公司 | Lubricating mechanism for engine rocker arm and engine |
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2017
- 2017-10-20 CN CN201721371219.8U patent/CN207393364U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837767A (en) * | 2021-01-30 | 2022-08-02 | 江苏常发农业装备股份有限公司 | Lubricating mechanism for engine rocker arm and engine |
| CN114837767B (en) * | 2021-01-30 | 2023-06-27 | 江苏常发农业装备股份有限公司 | Lubricating mechanism for engine rocker arm and engine |
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