CN211694318U

CN211694318U - Blade type variable pump for commercial vehicle

Info

Publication number: CN211694318U
Application number: CN202020220234.8U
Authority: CN
Inventors: 魏彪; 许仲秋; 刘光明; 佘笑梅; 阳雪冰
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Oil Pump Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-10-16
Anticipated expiration: 2030-02-27

Abstract

The utility model provides a commercial car vane type variable pump, including the pump body, rotor, blade, holding ring, variable slider and variable spring, be equipped with oil inlet, oil-out, rotor chamber on the pump body, the bottom in rotor chamber is equipped with recessed oil absorption chamber and presses the oil chamber, is equipped with first recess and the second recess that staggers mutually with oil inlet and oil-out on the lateral wall in rotor chamber, and the variable slider is installed in the rotor chamber, is equipped with the first U-shaped portion of inlaying in the first recess on the outer peripheral face of variable slider to and inlay the second U-shaped portion in the second recess, wherein forms the feedback oil pocket between first recess and the first U-shaped portion, forms the spring chamber in the second recess and between the second U-shaped portion for install variable spring; the positions of the feedback oil cavity and the spring cavity are both biased to the oil suction cavity, and the variable slide block can radially move in the rotor cavity under the action of oil pressure in the feedback oil cavity or the elastic force of the variable spring in the spring cavity. This can improve the reliability of the operation of the oil pump.

Description

Blade type variable pump for commercial vehicle

Technical Field

The utility model relates to an internal-combustion engine lubricating system technical field, in particular to vane type variable pump.

Background

Passenger car vane type variable displacement pump adopts the rotation type slider structure usually, and the slider rotates around the rotating pin and compresses the variable spring and realize the variable displacement, and the variable spring is in same one side with the oil feed chamber, and the benefit of arranging like this is compact structure, and the rotational speed range of adaptation is wide. Compare in passenger car, the high moment of torsion of commercial car low-speed, the load is bigger, and consequently the flow that lubricating system required is bigger, and pressure is higher, also has higher requirement to reliability, life-span, consumption simultaneously, if adopt rotation type slider structure, variable spring and oil feed chamber can arouse the oil inlet torrent with one side to and variable spring receives the impact, can greatly reduced oil pump operational reliability. Therefore, a new vane type variable displacement oil pump needs to be developed according to the characteristics of the commercial vehicle.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a commercial car blade type variable displacement pump that can improve operational reliability.

In order to solve the technical problem, the utility model discloses a following technical scheme: a commercial vehicle vane type variable pump comprises a pump body, a rotor, vanes, a positioning ring, a variable slider and a variable spring, wherein an oil inlet, an oil outlet and a rotor cavity are formed in the pump body, a recessed oil suction cavity and a recessed oil pressing cavity are formed in the bottom of the rotor cavity, a first groove and a second groove which are staggered with the oil inlet and the oil outlet are formed in the side wall of the rotor cavity, the variable slider is installed in the rotor cavity, a first U-shaped portion embedded in the first groove and a second U-shaped portion embedded in the second groove are formed in the outer peripheral surface of the variable slider, a feedback oil cavity is formed between the first groove and the first U-shaped portion, and a spring cavity is formed between the second groove and the second U-shaped portion and used for installing the variable spring; the positions of the feedback oil cavity and the spring cavity are both biased to the oil suction cavity, and the variable slide block can move radially in the rotor cavity under the action of oil pressure in the feedback oil cavity or the elastic force of a variable spring in the spring cavity.

Among the above-mentioned technical scheme, the oil pump has adopted slidingtype variable slider structure, and under the effect of feedback oil pocket internal oil pressure, variable slider can compress the variable spring and do linear motion to change the oil pump discharge capacity. The position of the variable spring is staggered with the oil inlet and the oil outlet, so that the impact of flow on the variable spring is avoided, and the reliability of the oil pump is improved. In addition, the positions of the feedback oil cavity and the variable spring are both deviated to one side of the oil suction cavity and are not in the same straight line with the connecting line of the variable sliding block and the center of the rotor, so that the internal oil pressure resistance can be reduced as much as possible, and the influence on the movement of the variable sliding block is reduced.

Furthermore, one end of the oil pressing cavity facing the oil inlet direction extends to the oil sealing area to form a triangular oil discharging groove. By adopting the structure, the volume between the two blades can be gradually communicated with the oil pressing cavity in advance before entering the oil pressing cavity, so that the rapid impact of high-pressure oil is avoided.

Furthermore, the second U-shaped part is provided with an oblique oil groove or an oblique oil hole for communicating the spring cavity and the rotor cavity. Because the volume of variable spring in compression process, spring chamber can diminish, can produce the resistance after the fluid pressurized that permeates the spring chamber, consequently sets up the oil extraction groove in UNICOM spring chamber and rotor chamber on second U-shaped portion, in time discharges the oil pressure in the spring chamber.

Furthermore, the positions of the two end faces of the variable sliding block, which correspond to the oil inlet and the oil outlet, are provided with grooves. Because the commercial vehicle oil pump flow is big, put at variable slider business turn over oil and increase the recess that sinks, can increase the area of overflowing to can reduce the velocity of flow, reduce the cavitation erosion risk.

Drawings

Fig. 1 is a schematic structural diagram of a vane type variable displacement pump according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a variable slider in an embodiment of the present invention;

FIG. 3 is a right side view of FIG. 2;

the reference signs are:

1-pump body 2-rotor 3-blade

4-positioning ring 5-variable slide block 6-variable spring

7-feedback oil chamber 1 a-oil inlet 1 b-oil outlet

1 c-oil suction cavity 1 d-oil pressing cavity 1 e-oil drainage groove

5 a-first U-shaped part 5 b-second U-shaped part 5 c-oblique oil groove

5 d-groove.

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 "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. 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.

As shown in fig. 1 and 2, the preferred embodiment of the present invention is: a commercial vehicle vane type variable displacement pump comprises a pump body 1, a rotor 2, vanes 3, a positioning ring 4, a variable slider 5 and a variable spring 6, wherein an oil inlet 1a, an oil outlet 1b and a rotor cavity are arranged on the pump body 1, a recessed oil suction cavity 1c and a pressure oil cavity 1d are arranged at the bottom of the rotor cavity, one end of the pressure oil cavity 1d facing to the oil inlet direction extends to an oil sealing area to form a triangular oil drainage groove 1e, a first groove and a second groove which are staggered with the oil inlet 1a and the oil outlet 1b are arranged on the side wall of the rotor cavity, the variable slider 5 is installed in the rotor cavity, a first U-shaped part 5a embedded in the first groove and a second U-shaped part 5b embedded in the second groove are arranged on the outer peripheral surface of the variable slider 5, a feedback 7 is formed between the first groove and the first U-shaped part 5a, and a spring cavity is formed between the second groove and the second U-shaped part 5b, the second U-shaped part 5b is provided with an inclined oil groove 5c or an inclined oil hole for communicating the spring cavity and the rotor cavity; the positions of the feedback oil cavity 7 and the spring cavity are both deviated to the oil suction cavity 1c, the variable slide block 5 can move radially in the rotor cavity under the action of oil pressure in the feedback oil cavity 7 or the elastic force of the variable spring 6 in the spring cavity, and grooves 5d are formed in the positions, corresponding to the oil inlet 1a and the oil outlet 1b, of the two end faces of the variable slide block 5.

In the above embodiment, the oil pump adopts a sliding variable slider structure, and under the action of the oil pressure in the feedback oil cavity 7, the variable slider 5 compresses the variable spring 6 to make linear motion, so as to change the displacement of the oil pump. The position of the variable spring 6 is staggered with the oil inlet and the oil outlet, so that the impact of flow on the variable spring 6 is avoided, and the reliability of the oil pump is improved. In addition, the positions of the feedback oil cavity 7 and the variable spring 6 are both deviated to one side of the oil suction cavity 1c and are not in the same straight line with the connecting line of the centers of the variable slide block and the rotor, so that the internal oil pressure resistance can be reduced as much as possible, and the influence on the movement of the variable slide block 5 is reduced.

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 commercial car blade type variable displacement pump, includes the pump body (1), rotor (2), blade (3), holding ring (4), variable slider (5) and variable spring (6), be equipped with oil inlet (1 a), oil-out (1 b), rotor chamber on the pump body (1), the bottom in rotor chamber is equipped with recessed oil absorption chamber (1 c) and presses oil chamber (1 d), its characterized in that: a first groove and a second groove which are staggered with an oil inlet (1 a) and an oil outlet (1 b) are formed in the side wall of the rotor cavity, the variable slider (5) is installed in the rotor cavity, a first U-shaped portion (5 a) embedded in the first groove and a second U-shaped portion (5 b) embedded in the second groove are arranged on the outer peripheral surface of the variable slider (5), a feedback oil cavity (7) is formed between the first groove and the first U-shaped portion (5 a), and a spring cavity is formed between the second groove and the second U-shaped portion (5 b) and used for installing a variable spring (6); the positions of the feedback oil cavity (7) and the spring cavity are both biased to the oil suction cavity (1 c), and the variable slide block (5) can move radially in the rotor cavity under the action of oil pressure in the feedback oil cavity (7) or the elastic force of the variable spring (6) in the spring cavity.

2. The commercial vehicle vane variable displacement pump as set forth in claim 1, wherein: one end of the oil pressing cavity (1 d) facing the oil inlet direction extends to the oil sealing area to form a triangular oil draining groove (1 e).

3. The commercial vehicle vane variable displacement pump according to claim 1 or 2, wherein: an oblique oil groove (5 c) or an oblique oil hole for communicating the spring cavity and the rotor cavity is formed in the second U-shaped portion (5 b).

4. The commercial vehicle vane variable displacement pump according to claim 1 or 2, wherein: and grooves (5 d) are arranged at the positions, corresponding to the oil inlet (1 a) and the oil outlet (1 b), of the two end faces of the variable slider (5).