阅读说明：本技术 一种装有调压阀的机油泵 (Oil pump with pressure regulating valve ) 是由 李维顺 许仲秋 刘光明 佘笑梅 于 2021-08-06 设计创作，主要内容包括：一种装有调压阀的机油泵,包括泵体和调节阀,泵体上设有低压腔、高压腔和阀孔,阀孔的内侧段设有反馈油孔,阀孔的外侧段设有排油孔,阀孔的侧壁上设有低压腔接口和高压腔接口；调节阀包括柱塞、弹簧和堵塞；柱塞包括内侧端的圆盘部、中间的杆状部、外侧端的圆筒部,圆盘部的外周面设有一个环形凹槽,该环形凹槽内设有径向通孔,杆状部设有轴向通孔用于将径向通孔与圆筒部的空腔连通；杆状部与阀孔的侧壁之间形成一个中转室,圆盘部的端部设有一个凸起,使圆盘部与阀孔底面之间形成一个反馈腔,该反馈腔靠近高压腔且通过反馈油孔与主油道相通。本发明提供的机油泵可以有效避免高压腔的高压油进入反馈腔内干扰调节阀的工作。(An oil pump with a pressure regulating valve comprises a pump body and a regulating valve, wherein a low-pressure cavity, a high-pressure cavity and a valve hole are arranged on the pump body, a feedback oil hole is formed in the inner side section of the valve hole, an oil discharge hole is formed in the outer side section of the valve hole, and a low-pressure cavity connector and a high-pressure cavity connector are arranged on the side wall of the valve hole; the regulating valve comprises a plunger, a spring and a plug; the plunger comprises a disc part at the inner side end, a rod-shaped part in the middle and a cylindrical part at the outer side end, the outer peripheral surface of the disc part is provided with an annular groove, a radial through hole is arranged in the annular groove, and the rod-shaped part is provided with an axial through hole for communicating the radial through hole with the cavity of the cylindrical part; a transfer chamber is formed between the rod-shaped part and the side wall of the valve hole, a bulge is arranged at the end part of the disk part, so that a feedback cavity is formed between the disk part and the bottom surface of the valve hole, and the feedback cavity is close to the high-pressure cavity and is communicated with the main oil gallery through a feedback oil hole. The oil pump provided by the invention can effectively prevent high-pressure oil in the high-pressure cavity from entering the feedback cavity to interfere the work of the regulating valve.)

1. An oil pump with a pressure regulating valve comprises a pump body (1) and the pressure regulating valve, wherein a low-pressure cavity (2), a high-pressure cavity (3) and a valve hole for mounting the pressure regulating valve are arranged on the pump body (1), a feedback oil hole is formed in the inner section of the valve hole, an oil discharge hole is formed in the outer section of the valve hole, and a low-pressure cavity connector and a high-pressure cavity connector which are adjacent to each other are arranged on the side wall of the valve hole; the method is characterized in that: the regulating valve comprises a plunger (4), a spring (5) and a plug (6) which are sequentially arranged in a valve hole from inside to outside; the plunger (4) is integrally in a high-foot cup shape and comprises a disc part (4 a) at the inner end, a rod-shaped part (4 b) in the middle and a cylindrical part (4 c) at the outer end, an annular groove (4 a 1) is formed in the outer peripheral surface of the disc part (4 a), a radial through hole (4 a 2) is formed in the annular groove (4 a 1), an axial through hole (4 b 1) is formed in the rod-shaped part (4 b) and used for communicating the radial through hole (4 a 2) with a cavity of the cylindrical part (4 c), one end of the spring (5) is installed in the cavity of the cylindrical part (4 c), the other end of the spring (5) abuts against the plug (6), a transfer chamber (7) is formed between the rod-shaped part (4 b) and the side wall of the valve hole, a bulge (4 a 3) capable of abutting against the bottom surface of the valve hole is formed at the end part of the disc part (4 a), and a feedback chamber (8) is formed between the disc part (4 a) and the bottom surface of the valve hole, the feedback cavity (8) is close to the high-pressure cavity (3) and is communicated with the main oil gallery through a feedback oil hole; when the oil pressure of the oil pump is in a normal range, the pre-tightening force of the spring (5) can prop against the plunger (4), so that a cylinder part (4 c) of the plunger blocks a low-pressure cavity interface on the side wall of the valve hole, and the high-pressure cavity interface is communicated with the transfer chamber (7); when the oil pressure entering the feedback cavity (8) is larger than the pretightening force of the spring (4), the pressure oil in the feedback cavity (8) can push the plunger (4) to compress the spring (5) and move towards the plug (6) until the transfer chamber (74 a) is simultaneously communicated with the high-pressure cavity interface and the low-pressure cavity interface, and at the moment, part of high-pressure oil in the high-pressure cavity (3) can flow into the low-pressure cavity (2) through the transfer chamber (7).

2. The oil pump equipped with a pressure-regulating valve according to claim 1, characterized in that: the number of the radial through holes (4 a 2) of the disk part (4 a) is two, and the two radial through holes (4 a 2) form a cross.

3. The oil pump equipped with a pressure-regulating valve according to claim 1 or 2, characterized in that: the oil discharge hole is arranged on the side wall of the valve hole and close to the plug (6) and communicated to the low-pressure cavity (2).

4. The oil pump equipped with a pressure-regulating valve according to claim 1 or 2, characterized in that: the oil discharge hole is a through hole arranged on the plug (6).

5. The oil pump equipped with a pressure-regulating valve according to claim 1 or 2, characterized in that: the oil pump is a gear type oil pump.

6. The oil pump equipped with a pressure-regulating valve according to claim 1 or 2, characterized in that: the oil pump is a rotor type oil pump.

Technical Field

The invention relates to a lubricating system of an internal combustion engine, in particular to an oil pump with a pressure regulating valve.

Background

The oil pump is an important component in a lubricating system, and has the function of providing sufficient pressure and flow for the lubricating system, the oil pressure must be ensured within a certain range to ensure that each friction piece is sufficiently lubricated and does not damage a related pressure-bearing piece, when the oil pressure of a main oil channel of the oil pump reaches the designed opening pressure, the pressure oil of a feedback oil channel enters a feedback cavity of a valve hole of a regulating valve to promote the regulating valve to move, and the oil in a high-pressure cavity is reduced to be discharged from an oil outlet, so that the oil pressure in the main oil channel is reduced, otherwise, the oil discharged from the oil outlet is increased when the regulating valve moves in the opposite direction, the oil pressure in the main oil channel is increased, and in the regulating process, the opening of the regulating valve is determined by the oil pressure of the feedback oil channel of the main oil channel.

In the conventional rotor type oil pump, since the feedback oil path of the main oil path is generally disposed at a side close to the high pressure chamber of the rotor, and the feedback oil hole for receiving the pressure oil of the feedback oil path is also disposed at a side close to the high pressure chamber, this design seems to simplify the structure, in fact, during the oil discharge process of the high pressure chamber of the rotor, a small amount of high pressure oil enters the feedback chamber through the gap between the valve hole of the pump body and the plunger of the regulating valve, and thus, the feedback chamber receives two pressure oils from the high pressure chamber and the main oil path, and in comparison, the pressure oil in the high pressure chamber fluctuates more than the pressure oil in the main oil path, and the pressure oil in the high pressure chamber reaches the feedback chamber earlier, so that when the oil pressure in the high pressure chamber is slightly higher, it is likely to interfere with the regulating oil pressure of the regulating valve, so that the regulating valve is opened in advance or improperly, thereby causing unstable oil pressure in the oil pump, Inaccurate adjustment.

Disclosure of Invention

The oil pump with the pressure regulating valve can solve the problem that high-pressure oil in a high-pressure cavity of the oil pump interferes the regulating valve to regulate the oil pressure.

In order to solve the technical problems, the invention adopts the following technical scheme: an oil pump with a pressure regulating valve comprises a pump body and a regulating valve, wherein a low-pressure cavity, a high-pressure cavity and a valve hole for mounting the regulating valve are arranged on the pump body, a feedback oil hole is formed in the inner side section of the valve hole, an oil discharging hole is formed in the outer side section of the valve hole, and a low-pressure cavity connector and a high-pressure cavity connector which are adjacent to each other are arranged on the side wall of the valve hole; the regulating valve comprises a plunger, a spring and a plug which are sequentially arranged in the valve hole from inside to outside; the plunger is integrally in a high-foot cup shape and comprises a disc part at the inner side end, a rod-shaped part in the middle and a cylindrical part at the outer side end, an annular groove is formed in the outer peripheral surface of the disc part, a radial through hole is formed in the annular groove, and an axial through hole is formed in the rod-shaped part and is used for communicating the radial through hole with a cavity of the cylindrical part; one end of the spring is arranged in the cavity of the cylindrical part, the other end of the spring abuts against the plug, a transfer chamber is formed between the rod-shaped part and the side wall of the valve hole, a bulge capable of abutting against the bottom surface of the valve hole is arranged at the end part of the disc part, so that a feedback cavity is formed between the disc part and the bottom surface of the valve hole, and the feedback cavity is close to the high-pressure cavity and communicated with the main oil duct through a feedback oil hole; when the oil pressure of the engine oil pump is in a normal range, the pre-tightening force of the spring can prop against the plunger, so that the cylinder part of the plunger plugs the low-pressure cavity interface on the side wall of the valve hole, and the high-pressure cavity interface is communicated with the transfer chamber; when the oil pressure entering the feedback cavity is larger than the pretightening force of the spring, the pressure oil in the feedback cavity can push the plunger to compress the spring and move towards the plug until the transfer chamber is communicated with the high-pressure cavity interface and the low-pressure cavity interface at the same time, and at the moment, part of the high-pressure oil in the high-pressure cavity can flow into the low-pressure cavity through the transfer chamber.

In above-mentioned technical scheme, because the outer peripheral face of disc portion is equipped with an annular groove, be equipped with radial through-hole in this annular groove, rod-shaped portion is equipped with axial through-hole and is used for communicating radial through-hole and the cavity of cylindric portion, just so can carry out the drainage with the high-pressure oil that the clearance between valve opening and the plunger penetrated, with the high-pressure oil drainage to the spring section of valve opening and through oil drain hole discharge valve opening, just so can avoid the high-pressure oil infiltration of high-pressure chamber to the feedback intracavity.

Preferably, the number of the radial through holes of the disk part is two, and the two radial through holes form a cross.

In one embodiment, the drain hole is provided on the side wall of the valve bore near the plug and communicates to the low pressure chamber.

In one embodiment, the oil drain hole is a through hole provided on the plug.

In one embodiment, the oil pump is a gear-type oil pump.

In one embodiment, the oil pump is a rotor type oil pump.

The oil pump provided by the invention can effectively prevent high-pressure oil in the high-pressure cavity from entering the feedback cavity to interfere the work of the regulating valve, so that the regulating valve only receives the feedback of the feedback oil of the main oil duct, thereby timely and accurately regulating the oil pressure and ensuring the stability of the oil pressure of the oil pump.

Drawings

Fig. 1 is a schematic structural diagram of an oil pump in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the overall structure of a plunger according to embodiment 1 of the present invention;

fig. 3 is a schematic sectional view showing a plunger disk portion in embodiment 1 of the invention;

the reference signs are:

1-pump body 2-low pressure cavity 3-high pressure cavity

4-plunger 5-spring 6-plug

7-transfer chamber 8-feedback cavity 4 a-disk part

4a 1-annular groove 4a 2-radial through hole 4a 3-convex valve hole

4 b-rod-shaped portion 4b 1-axial through hole 4 c-cylindrical portion.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.

Example 1

As shown in fig. 1 to 3, an oil pump with a pressure regulating valve, which may be a gear-type oil pump or a rotor-type oil pump, includes a pump body 1 and a regulating valve, wherein the pump body 1 is provided with a low pressure cavity 2, a high pressure cavity 3 and a valve hole for mounting the regulating valve, an inner section of the valve hole is provided with a feedback oil hole, an outer section of the valve hole is provided with an oil discharge hole, and a side wall of the valve hole is provided with a low pressure cavity interface and a high pressure cavity interface which are adjacent to each other; the regulating valve comprises a plunger 4, a spring 5 and a plug 6 which are arranged in the valve hole from inside to outside in sequence; the plunger 4 is integrally in a high-foot cup shape and comprises a disc part 4a at the inner side end, a rod-shaped part 4b in the middle and a cylindrical part 4c at the outer side end, an annular groove 4a1 is formed in the outer peripheral surface of the disc part 4a, two radial through holes 4a2 are formed in the annular groove 4a1, the two radial through holes 4a2 form a cross, the rod-shaped part 4b is provided with an axial through hole 4b1 used for communicating the radial through hole 4a2 with the cavity of the cylindrical part 4c, and an oil discharge hole is formed in the side wall of the valve hole at a position close to the blockage and communicated to the low-pressure cavity 2; one end of a spring 5 is arranged in a cavity of the cylindrical part 4c, the other end of the spring 5 abuts against a plug 6, a transfer chamber 7 is formed between the rod-shaped part 4b and the side wall of the valve hole, a protrusion 4a3 which can be abutted against the bottom surface of the valve hole is arranged at the end part of the disc part 4a, so that a feedback cavity 8 is formed between the disc part 4a and the bottom surface of the valve hole, and the feedback cavity 8 is close to the high-pressure cavity 3 and is communicated with the main oil gallery through a feedback oil hole; when the oil pressure of the engine oil pump is in a normal range, the pre-tightening force of the spring 5 can prop against the plunger 4, so that the cylinder part 4c of the plunger blocks a low-pressure cavity interface on the side wall of the valve hole, and the high-pressure cavity interface is communicated with the transfer chamber 7; when the oil pressure entering the feedback cavity 8 is larger than the pretightening force of the spring 5, the pressure oil in the feedback cavity 8 can push the plunger 4 to compress the spring 5 and move towards the plug 6 until the transfer chamber 7 is communicated with the high-pressure cavity interface and the low-pressure cavity interface at the same time, and at the moment, part of the high-pressure oil in the high-pressure cavity 3 can flow into the low-pressure cavity 2 through the transfer chamber 7.

In the above technical solution, since the outer peripheral surface of the disk portion 4a is provided with the annular groove 4a1, the annular groove 4a1 is provided with the radial through hole 4a2, and the rod portion 4b is provided with the axial through hole 4b1 for communicating the radial through hole 4a2 with the cavity of the cylinder portion 4c, so that the high-pressure oil permeating from the gap between the valve hole and the plunger 4 can be drained, the high-pressure oil is drained to the spring section of the valve hole and drained to the low-pressure cavity 2 of the oil pump through the oil drain hole, and thus the high-pressure oil in the high-pressure cavity 3 can be prevented from permeating into the feedback cavity 8 to interfere with the regulating valve, and the regulating valve only receives the feedback of the feedback oil from the main oil gallery, so that the oil pressure can be timely and accurately regulated, and the stability of the oil pressure of the oil pump can be ensured.

Example 2

The oil pump structure provided by this embodiment is basically the same as that of embodiment 1, and the difference is that the oil drain hole in this embodiment is a through hole provided in the plug 6, and oil in the valve hole can be drained to the oil pan.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.