阅读说明：本技术 机油泵、发动机润滑系统及汽车 (Oil pump, engine lubrication system and automobile ) 是由 王宏大 王次安 刘吉林 倪成鑫 王军 昂金凤 张超 于 2019-08-30 设计创作，主要内容包括：本发明公开一种机油泵、发动机润滑系统及汽车,所述机油泵包括泵壳体、外转子及内转子,所述泵壳体内形成有低压油腔和高压油腔,所述外转子设于所述泵壳体内,所述内转子转动套设于所述外转子内,所述内转子与所述外转子之间形成有多个容积腔,多个所述容积腔包括容积最大的第一容积腔,其中,沿所述泵壳体的周向上对应在所述低压油腔和高压油腔之间形成有增压过渡区间,所述第一容积腔对应形成于所述增压过渡区间,所述低压油腔具有朝向所述增压过渡区间的适配端,所述适配端的外形与所述第一容积腔相适配,以使得所述内转子在转动过程中,所述第一容积腔与所述低压油腔瞬间分离隔断,减少空化风险,从而提高机油泵的NVH性能。(The invention discloses an oil pump, an engine lubrication system and an automobile, wherein the oil pump comprises a pump shell, an outer rotor and an inner rotor, a low-pressure oil cavity and a high-pressure oil cavity are formed in the pump shell, the outer rotor is arranged in the pump shell, the inner rotor is rotatably sleeved in the outer rotor, a plurality of volume cavities are formed between the inner rotor and the outer rotor, the plurality of volume cavities comprise a first volume cavity with the largest volume, a pressurization transition region is formed between the low-pressure oil cavity and the high-pressure oil cavity along the circumferential direction of the pump shell correspondingly, the first volume cavity is correspondingly formed in the pressurization transition region, the low-pressure oil cavity is provided with an adapting end facing the pressurization transition region, the appearance of the adapting end is adapted to the first volume cavity, so that the first volume cavity and the low-pressure oil cavity are separated and separated instantaneously in the rotating process of the inner rotor, and the cavitation risk is reduced, so that the NVH performance of the oil pump is improved.)

1. An oil pump, comprising:

A pump housing having a low pressure oil chamber and a high pressure oil chamber formed therein;

The outer rotor is arranged in the pump shell; and the number of the first and second groups,

The inner rotor is rotatably sleeved in the outer rotor, a plurality of volume cavities are formed between the inner rotor and the outer rotor, and the volume cavities comprise first volume cavities with the largest volume;

wherein, follow the circumference of pump casing upwards corresponds be formed with the pressure boost transition interval between low pressure oil pocket and the high pressure oil pocket, first volume chamber correspond form in the pressure boost transition interval, the low pressure oil pocket has the orientation the adaptation end between pressure boost transition interval, the appearance of adaptation end with first volume chamber looks adaptation, so that the inner rotor is at the rotation in-process, first volume chamber with low pressure oil pocket separation wall in the twinkling of an eye.

2. The oil pump of claim 1, wherein the first volume chamber has a maximum width value L in a radial direction of the pump housing;

The diameter of the root circle of the inner rotor is D₁The diameter of the addendum circle of the outer rotor is D₂wherein L ═ D (D)₂-D₁)/2。

3. The oil pump of claim 1, wherein the adapter end includes an adapter chamber body and two adapter chamber arms extending from the adapter chamber body toward the supercharging transition region, the two adapter chamber arms being spaced apart inwardly and outwardly, the adapter chamber body and the two adapter chamber arms each being instantaneously and synchronously separated from the first volume chamber for adaptation; and/or the presence of a gas in the gas,

The high-pressure oil chamber extends to the pressurization transition section to form a first unloading groove, so that the first volume chamber is communicated with the first unloading groove while the first volume chamber is separated from the low-pressure oil chamber instantly.

4. The oil pump of claim 3, wherein the plurality of volume chambers includes a second volume chamber having a smallest volume;

A pressure reducing transition section is formed between the low-pressure oil chamber and the high-pressure oil chamber along the circumferential direction of the pump housing, and the second volume chamber is formed in the pressure reducing transition section;

And a second unloading groove extends towards the decompression transition section of the high-pressure oil cavity and is used for communicating the second volume cavity.

5. the oil pump of claim 4, wherein the pump housing includes a pump body and a pump cover that covers the pump body, the first relief groove being formed in the pump cover; and/or the presence of a gas in the gas,

The pump shell comprises a pump body and a pump cover arranged on the pump body in a covering mode, and the second unloading groove is formed in the pump cover.

6. The oil pump of claim 4, wherein the pump housing includes a pump body and a pump cover covering the pump body, and the first relief grooves are provided in two and formed on the pump body and the pump cover, respectively; and/or the presence of a gas in the gas,

The pump shell comprises a pump body and a pump cover arranged on the pump body, and the two second unloading grooves are formed in the pump body and the pump cover respectively.

7. The oil pump of claim 4, wherein the depth of the first relief groove is H1, the width of the first relief groove is L1, and 0.5 ≤ H1/L1 ≤ 0.6; and/or the presence of a gas in the gas,

The depth of the second unloading groove is H2, the width of the second unloading groove is L2, and H2/L2 is more than or equal to 0.5 and less than or equal to 0.6.

8. The oil pump of claim 7, wherein H1/L1 is 0.57, and/or H2/L2 is 0.57.

9. An engine lubrication system, characterized by comprising an oil pump according to any one of claims 1 to 8.

10. A vehicle comprising the engine lubrication system of claim 9.