CN213598029U

CN213598029U - Movable supercharged pump outlet control two-stage variable oil pump

Info

Publication number: CN213598029U
Application number: CN202022657506.3U
Authority: CN
Inventors: 杨正中; 许仲秋; 刘光明; 佘笑梅
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Oil Pump Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-07-02
Anticipated expiration: 2030-11-17

Abstract

The utility model provides a remove booster-type pump outlet control two-stage variable oil pump, relate to oil pump technical field, it includes the pump body, the pump cover, the pump shaft, the rotor, slider and spring, be equipped with the feedback chamber in the pump body, be equipped with the control valve on the pump cover, it has the control valve spring to have connect between plunger and the valve opening rear end to be equipped with in the valve opening of control valve, be provided with the bulge loop on the global at plunger middle part, the front end of plunger is equipped with the end cap, it has inlet port and oil outlet to open on the control valve lateral wall, inlet port and pump outlet intercommunication and inlet port are located the front side of bulge loop, form the control valve that communicates with the pump outlet between bulge loop and the end cap and normally lead to the chamber, oil outlet and feedback chamber intercommunication and oil outlet are located the rear side of bulge loop, be equipped with the. The utility model discloses an inside oil duct of oil pump self and solenoid valve realize the two-stage variable, need not to design the feedback oilhole on the engine cylinder body to the structure of very big simplification engine cylinder body.

Description

Movable supercharged pump outlet control two-stage variable oil pump

Technical Field

The utility model belongs to the technical field of the oil pump technique and specifically relates to a remove booster-type pump export control two-stage variable oil pump.

Background

In practical application, a feedback oil hole is usually reserved on an engine cylinder body of a conventional two-stage variable oil pump, so that feedback oil in a main oil duct can enter the oil pump to drive the oil pump to change the displacement, which causes the design of the engine cylinder body to be limited to a certain extent, and the whole structure is complicated due to the oil duct connection between the oil pump and the engine cylinder body.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a remove booster-type pump outlet control two-stage variable oil pump realizes the two-stage variable through inside oil duct of oil pump self and solenoid valve, need not to design the feedback oilhole on the engine cylinder body to very big simplification engine cylinder body's structure.

In order to solve the technical problem, the utility model discloses a following technical scheme: a movable supercharged pump outlet control two-stage variable oil pump comprises a pump body, a pump cover, a pump shaft, a rotor, a slider and a spring, wherein a feedback cavity is arranged in the pump body, a control valve is arranged on the pump cover, a plunger is arranged in a valve hole of the control valve, a control valve spring is connected between the plunger and the rear end of the valve hole in a butting manner, a convex ring matched with the inner wall of the valve hole is arranged on the peripheral surface of the middle part of the plunger, a plug capable of plugging an inlet at the front end of the valve hole is arranged at the front end of the plunger, an oil inlet and an oil outlet are formed in the side wall of the control valve, the oil inlet is communicated with a pump outlet and is positioned at the front side of the convex ring, a control valve normally-open cavity communicated with the pump outlet is formed between the convex ring and the plug, the oil outlet is communicated with the feedback cavity and is positioned at the rear side of, the oil passage is internally provided with an electromagnetic valve capable of controlling the oil passage to be switched on and off, and the inner wall surface of the pump body is provided with a guide rod inserted into the spring.

Preferably, the cross-sectional area of the convex ring is larger than that of the plug.

More preferably, the oil passages include a first oil passage which is communicated with the pump outlet and coaxially communicated with the oil inlet, a second oil passage which penetrates between the first oil passage and the oil inlet and is parallel to the control valve hole, and a third oil passage which is communicated with an inlet at the front end of the control valve hole and is parallel to the second oil passage, the solenoid valve is arranged at the tail end of the second oil passage and the front end of the third oil passage, and the solenoid valve can control the connection and disconnection between the second oil passage and the third oil passage.

More preferably, a filter is installed in the first oil passage.

More preferably, a filter screen is further arranged between the tail end of the second oil channel and the solenoid valve.

More preferably, a screw plug is arranged at the rear end of the valve hole of the control valve, the front end of the control valve spring abuts against the convex ring, and the rear end of the control valve spring abuts against the screw plug.

The utility model discloses a theory of operation is: under the high-pressure mode of the oil pump, oil at the outlet of the pump enters a normally open cavity of the control valve, the electromagnetic valve is in a power-off state, so that an oil passage is blocked, only the area of the front end face of the convex ring of the plunger at the moment is subjected to oil pressure acting force, the oil pressure acting force is not enough to overcome the force of a spring of the control valve, so that the oil outlet is closed, the oil cannot enter the feedback cavity from the oil outlet to push the sliding block, and the position of the sliding block can be kept in a state that the displacement of the oil pump is high; under the oil pump low pressure mode, the solenoid valve circular telegram is opened, thereby make the fluid of pump export not only enter into the control valve and smoothly pass through the chamber and act on the bulge loop terminal surface, thereby can also enter into the control valve opening front end entry through the oil duct and act on the terminal surface of plunger front end cap, make the oil pressure effort area that the plunger received at this moment be the sum of bulge loop terminal surface area and end cap terminal surface area, the effort of control valve spring can be overcome to this effort size, so that the plunger moves backward until the bulge loop moves to the rear of oil outlet, the oil outlet is opened completely this moment, can make the fluid in the control valve discharge to the feedback chamber from the oil outlet, thereby make the fluid pressure increase in the feedback chamber and push the slider and produce the displacement, reach the displacement's of changing the oil pump mesh, realize the accurate control of two.

The oil pump realizes two-stage variable control through the internal oil duct and the electromagnetic valve, so that a feedback oil hole is not required to be designed on an engine cylinder body, the structure of the engine cylinder body is greatly simplified, the structure of the original engine is not required to be changed even when the engine is used in a matched manner, the integral assembly structure of the engine cylinder body and the oil pump is simplified, and the two-stage variable oil pump achieves a certain energy-saving effect.

Drawings

Fig. 1 is a schematic cross-sectional view of the overall structure in an embodiment of the present invention;

fig. 2 is an exploded view of the whole structure in the embodiment of the present invention;

fig. 3 is the embodiment of the present invention provides a schematic structural diagram when hiding the pump cover.

The reference signs are:

1-pump body 2-pump cover 3-pump shaft

4-rotor 5-slide block 6-spring

7-feedback cavity 8-control valve 8 a-oil inlet

8 b-oil outlet 9-plunger 9 a-convex ring

9 b-plug 9 c-control valve normally open cavity 10-control valve spring

11-oil passage 11 a-first oil passage 11 b-second oil passage

11 c-third oil duct 12-solenoid valve 13-Filter

14-filter screen 15-plug screw.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-3, a mobile booster pump outlet control two-stage variable oil pump comprises a pump body 1, a pump cover 2, a pump shaft 3, a rotor 4, a slider 5 and a spring 6, wherein a feedback cavity 7 is arranged in the pump body 1, a control valve 8 is arranged on the pump cover 2, a plunger 9 is arranged in a valve hole of the control valve 8, a control valve spring 10 is connected between the plunger 9 and the rear end of the valve hole in a butting manner, a convex ring 9a matched with the inner wall of the valve hole is arranged on the peripheral surface of the middle part of the plunger 9, a plug 9b capable of plugging an inlet at the front end of the valve hole is arranged at the front end of the plunger 9, an oil inlet 8a and an oil outlet 8b are arranged on the side wall of the control valve 8, the oil inlet 8a is communicated with the pump outlet and the oil inlet 8a is positioned at the front side of the convex ring 9a, a control valve normally open cavity 9c communicated with the pump outlet is formed between the convex ring 9, the pump cover 2 is also provided with an oil duct 11 for communicating the pump outlet with the inlet at the front end of the valve hole of the control valve 8, the oil duct 11 is internally provided with an electromagnetic valve 12 capable of controlling the on-off of the oil duct, and the inner wall surface of the pump body 1 is provided with a guide rod (not shown in the attached drawing) inserted into the spring 6.

When the two-stage variable oil pump is operated in a high-pressure mode, the movable supercharged pump outlet control oil pump provided by the embodiment enables the electromagnetic valve 12 to be de-energized, the plunger 9 is only subjected to the acting force of oil on the end face of the convex ring 9a, the acting force is smaller than the acting force of the control valve spring 10, so that the oil outlet 8b is closed, the flowing direction of the oil is shown by a blank arrow in fig. 1, and the sliding block 5 cannot be subjected to the thrust generated by the feedback cavity 7. And during operation under the low pressure mode, solenoid valve 12 circular telegram, the flow direction of fluid is shown as blank arrow and black arrow in fig. 1, plunger 9 can receive the fluid effort of bulge loop 9a terminal surface and end cap 9b terminal surface area sum, thereby this effort can overcome control valve spring 10 and make plunger 9 move backward, and then make oil outlet 8b open and arrange the oil, fluid just can push away slider 5 displacement after entering into feedback chamber 7, thereby change the discharge capacity size of oil pump, realize the accurate control of two-stage variable.

Preferably, the cross-sectional area of the protruding ring 9a is larger than that of the plug 9b, so that the valve hole of the control valve 8 can be provided with two hole parts having different inner diameters, the inner diameter of the front part hole is matched with the outer diameter of the plug 9b, the inner diameter of the rear part hole is larger than that of the front part hole and matched with the outer diameter of the protruding ring 9a, and the control valve normally-open cavity 9c is provided in the rear part hole, so that the control valve normally-open cavity 9c can have a sufficient volume capacity.

More preferably, the oil passages 11 include a first oil passage 11a communicating with the pump outlet and coaxially communicating with the oil inlet 8a, a second oil passage 11b penetrating between the first oil passage 11a and the oil inlet 8a and parallel to the valve hole of the control valve 8, and a third oil passage 11c communicating with the inlet at the front end of the valve hole of the control valve 8 and parallel to the second oil passage 11b, and the solenoid valve 12 is disposed at the end of the second oil passage 11b and the front end of the third oil passage 11c, so that the on-off between the second oil passage 11b and the third oil passage 11c can be controlled by the solenoid valve 12.

It should be noted that, in the above embodiment, no specific structure of the electromagnetic valve 12 is defined, and the electromagnetic valve 12 may be an on-off electromagnetic valve commonly used in the art, as long as it can control the on-off between the second oil passage 11b and the third oil passage 11c, and those skilled in the art do not have any obstacle to implementing the technical means, and therefore, no detailed description is given.

Preferably, a filter 13 is installed in the first oil passage 11a, and the oil entering the second oil passage 12b and the control valve normally open chamber 9c can be subjected to impurity removal and filtration. Similarly, a filter screen 14 may be disposed between the end of the second oil passage 11b and the electromagnetic valve 12, so that the oil in the second oil passage 11b can be further filtered after passing through the filter screen 14, and the oil subsequently entering the control valve 9 is smoother and cleaner.

In the present embodiment, it is more preferable that a screw plug 15 is provided at the rear end of the valve hole of the control valve 8, and the front end of the control valve spring 10 abuts against the convex ring 9a and the rear end abuts against the screw plug 15.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.

Claims

1. The utility model provides a remove booster-type pump and export control two-stage variable oil pump, includes the pump body (1), pump cover (2), pump shaft (3), rotor (4), slider (5) and spring (6), be equipped with feedback chamber (7), its characterized in that in the pump body (1): the pump cover (2) is provided with a control valve (8), a plunger (9) is arranged in a valve hole of the control valve (8), a control valve spring (10) is connected between the plunger (9) and the rear end of the valve hole in a butting mode, a convex ring (9 a) matched with the inner wall of the valve hole is arranged on the peripheral surface of the middle portion of the plunger (9), a plug (9 b) capable of plugging an inlet at the front end of the valve hole is arranged at the front end of the plunger (9), an oil inlet (8 a) and an oil outlet (8 b) are formed in the side wall of the control valve (8), the oil inlet (8 a) is communicated with a pump outlet, the oil inlet (8 a) is located on the front side of the convex ring (9 a), a control valve normally-open cavity (9 c) communicated with the pump outlet is formed between the convex ring (9 a) and the plug (9 b), the oil outlet (8 b) is communicated with a feedback cavity (7), and the oil outlet (8 b) is located on, the pump cover (2) is further provided with an oil duct (11) communicated with the pump outlet and an inlet at the front end of a valve hole of the control valve (8), an electromagnetic valve (12) capable of controlling the on-off of the oil duct (11) is arranged in the oil duct, and a guide rod inserted into the spring (6) is arranged on the inner wall surface of the pump body (1).

2. The mobile booster pump outlet control two-stage variable oil pump of claim 1, characterized in that: the cross-sectional area of the convex ring (9 a) is larger than that of the plug (9 b).

3. The mobile booster pump outlet control two-stage variable oil pump of claim 1, characterized in that: the oil passage (11) comprises a first oil passage (11 a) communicated with the pump outlet and coaxially communicated with the oil inlet hole (8 a), a second oil passage (11 b) penetrating between the first oil passage (11 a) and the oil inlet hole (8 a) and parallel to the valve hole of the control valve (8), and a third oil passage (11 c) communicated with the inlet at the front end of the valve hole of the control valve (8) and parallel to the second oil passage (11 b), wherein the electromagnetic valve (12) is arranged at the tail end of the second oil passage (11 b) and the front end of the third oil passage (11 c), and the electromagnetic valve (12) can control the on-off between the second oil passage (11 b) and the third oil passage (11 c).

4. The mobile booster pump outlet control two-stage variable oil pump of claim 3, characterized in that: a filter (13) is installed in the first oil passage (11 a).

5. The mobile booster pump outlet control two-stage variable oil pump of claim 4, characterized in that: and a filter screen (14) is arranged between the tail end of the second oil channel (11 b) and the electromagnetic valve (12).

6. The mobile booster pump outlet control two-stage variable oil pump of claim 1, characterized in that: the rear end of a valve hole of the control valve (8) is provided with a plug screw (15), the front end of the control valve spring (10) is abutted against the convex ring (9 a), and the rear end of the control valve spring is abutted against the plug screw (15).