CN217602981U

CN217602981U - Impeller structure of automobile fuel pump

Info

Publication number: CN217602981U
Application number: CN202220894047.7U
Authority: CN
Inventors: 胡小平; 鄢波
Original assignee: Chongqing Dege Technology Development Co ltd
Current assignee: Chongqing Dege Technology Development Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-10-18
Anticipated expiration: 2032-04-18

Abstract

The utility model relates to an automobile fuel pump impeller structure, which comprises a pump cover, a pump chamber and an impeller body arranged between the pump cover and the pump chamber, wherein the impeller body and the pump cover are coaxially arranged, the center of the impeller body is provided with a shaft hole, the inner side of the excircle of the impeller body is provided with a blade ring groove, and a plurality of inclined blades are wound in the blade ring groove; a plurality of arc-shaped oil guide grooves are equidistantly arranged on the inner side close to the blade ring groove, and one end of each oil guide groove is provided with a balance hole; impeller body openly is located shaft hole and multichannel and leads the region between the oil groove to be equipped with openly and subtract gluey structure impeller body reverse side is located shaft hole and multichannel and leads the region between the oil groove to be equipped with the reverse side and subtracts gluey structure, subtracts the gluey mouth of advancing when leaving impeller body shaping on gluey structure at this reverse side. The fuel pump can avoid expansion deformation under high pressure, is interfered with the pump cover and the pump chamber, keeps stable and lasting performance of the fuel pump under high pressure, further ensures safe operation of an engine, and improves the NVH comfort of the whole vehicle.

Description

Impeller structure of automobile fuel pump

Technical Field

The utility model relates to an automobile fuel conveying system, concretely relates to automobile fuel pump impeller structure.

Background

With the popularization of the national six-emission standard (the national sixth-stage motor vehicle pollutant emission standard), the requirement on the input pressure of a fuel pump is higher by adopting a large number of direct injection engines. In order to deal with the rise of the fuel pressure, the operation rotating speed of the pump core is improved, and internal parts bear higher fuel pressure. The running noise of the impeller is increased at a high rotating speed, the NVH comfort of the whole vehicle is influenced, and the driving experience of customers is reduced. Due to the fact that the forming condition of PPS plastic (polyphenylene sulfide) is unstable in the manufacturing process of the fuel pump impeller, the filling density of a glue inlet of the impeller is insufficient. The fuel pump may be subjected to swelling deformation due to the influence of high-pressure fuel, and may interfere with the pump cover and the pump chamber, resulting in poor operation of the fuel pump. Under the extreme state, the engine may stall during the vehicle driving, and potential safety hazards exist. Therefore, improvements to existing impeller structures are desired.

CN 204610366U discloses "an automobile fuel pump impeller", include circular disk body and locate the round blade on the circular disk body, the both sides terminal surface of circular disk body is equipped with balancing hole and guiding gutter, and balancing hole and guiding gutter pair the setting, and the balancing hole is the through-hole that link up circular disk body both sides terminal surface, its characterized in that: the blades are gourd ladle-shaped blades, and blade surfaces of the blades are provided with gourd ladle-shaped cambered surfaces; the balance hole is an elliptical hole, and the long axis direction of the elliptical hole is the same as the radial direction of the impeller. It compares the automobile fuel pump impeller of traditional linear type blade, has the advantage of increase oil pump flow, reduction oil pump operating current and noise, and the impeller both sides terminal surface is more difficult wearing and tearing simultaneously, improves life.

CN 203978914U discloses "an impeller for car fuel pump", including setting up the impeller body between upper and lower flange lid, be equipped with the blade groove in the outer loop of impeller body, around being equipped with the blade of slope, its characterized in that in the blade groove: the upper surface and the lower surface of the inner ring of the impeller body are respectively provided with a plurality of annular balancing grooves with the same circumference, the bottoms of the balancing grooves are provided with slopes, and pressure balancing holes which are communicated with each other are formed between the upper balancing groove and the lower balancing groove. The friction mechanical loss between the impeller and the upper and lower flange covers during movement is reduced, and the service life of the impeller is prolonged.

The technical solutions disclosed in the two patent documents are beneficial attempts made in the technical field to solve the problem of friction and wear of the end faces of the two sides of the impeller.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an improve a car fuel pump impeller structure, it can avoid taking place the bulging deformation under the high pressure, takes place to interfere with pump cover, pump chamber, keeps fuel pump stable performance under the high pressure, lasting, and then guarantees the engine safe operation, improves whole car NVH travelling comfort.

An automobile fuel pump impeller structure, include pump cover, pump chamber and establish the impeller body between pump cover and pump chamber, impeller body and the coaxial setting of pump cover impeller body center is equipped with the shaft hole, and impeller body's excircle inboard is equipped with the blade annular, around the blade that is equipped with the polylith slope, characterized by in this blade annular: a plurality of arc-shaped oil guide grooves are equidistantly arranged on the inner side close to the blade ring groove, and one end of each oil guide groove is provided with a balance hole; impeller body openly is located shaft hole and multichannel and leads the region between the oil groove to be equipped with openly and subtract gluey structure impeller body reverse side is located shaft hole and multichannel and leads the region between the oil groove to be equipped with the reverse side and subtracts gluey structure, subtracts the gluey mouth of advancing when leaving impeller body shaping on gluey structure at this reverse side.

Further, the front glue reducing structure and the back glue reducing structure are both circular rings sinking by 0.5 mm.

Further, the balance hole penetrates through the impeller body.

Further, the pump cover is equipped with the oil inlet and the oil groove with the oil inlet intercommunication.

Further, the pump chamber is provided with an oil outlet.

The utility model has the advantages that:

because the front side of the impeller body is provided with the front side glue reducing structure, and the back side of the impeller body is provided with the back side glue reducing structure, the expansion area of the glue inlet can not be in contact with the pump cover and the pump chamber to generate interference, so that the working maintenance performance of the fuel pump under high pressure is stable and durable, the safe operation of an engine is further ensured, and the NVH comfort of the whole vehicle is improved.

Because the pressure difference between the oil inlet end and the oil outlet end of the fuel pump impeller body is large, when the impeller body rotates at a high speed, blades at a high-pressure area are stressed to incline to a low-pressure area to generate unbalanced moment, and pulsation noise and friction loss are caused; through set up on impeller body and lead oil groove and balancing hole, the balancing hole runs through impeller body, can reduce impeller body's just, reverse side advances, goes out the pressure differential of fuel, improves the eccentric wear condition of impeller body high-speed moving, leads the lubricated effect of oil groove in addition, can reduce wearing and tearing extension pump core's life.

Drawings

Fig. 1 is a schematic view of the present invention;

fig. 2 is a front isometric view of the impeller of the present invention;

fig. 3 is a reverse side isometric view of the impeller of the present invention;

fig. 4 is a sectional view of the impeller.

In the figure (technical feature notation):

1-pump cover, 11-oil inlet, 12-oil groove;

2-impeller body, 20-shaft hole, 21-oil guide groove, 22-balance hole, 23-front glue reducing structure, 24-back glue reducing structure, and 25-glue inlet;

3-pump chamber, 31-oil outlet.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 4, a car fuel pump impeller structure that shows, including pump cover 1, pump chamber 3 and establish impeller body 2 between pump cover and pump chamber, impeller body 2 and the coaxial setting of pump cover 1 are equipped with shaft hole 20 at impeller body 2 center, and the excircle inboard of impeller body 2 is equipped with the blade annular, around being equipped with the blade of polylith slope, characterized by in this blade annular: a plurality of arc oil guide grooves 21 are equidistantly arranged on the inner side close to the blade ring groove, and one end of each oil guide groove 21 is provided with a balance hole 22; the region that is located shaft hole 20 and multichannel at impeller body 2 openly leads between the oil groove 21 is equipped with openly subtracts glued structure 23, is located shaft hole 20 and multichannel at impeller body 2 reverse side and leads the region between the oil groove 21 and be equipped with reverse side and subtract glued structure 24, subtracts gluey mouth 25 of advancing when leaving the impeller body shaping on this reverse side to subtract glued structure 24. Set up openly and subtract gluey structure and reverse side and subtract gluey structure, the inflation district that can advance gluey mouth does not take place to interfere with pump cover, pump chamber contact, keeps work retention performance stable, durable under the fuel pump high pressure, and then guarantees the engine safe operation, improves whole car NVH travelling comfort.

The front glue reducing structure 23 and the back glue reducing structure 24 are both circular rings sinking 0.5 mm.

The balance hole 22 penetrates the impeller body 2. Because the pressure difference between the oil inlet end and the oil outlet end of the fuel pump impeller body is large, when the impeller body rotates at a high speed, blades at a high-pressure area are stressed to incline to a low-pressure area to generate unbalanced moment, and pulsation noise and friction loss are caused; through set up on impeller body and lead oil groove and balancing hole, the balancing hole runs through impeller body, can reduce impeller body's just, reverse side advances, goes out the pressure differential of fuel, improves the eccentric wear condition of impeller body high-speed moving, leads the lubricated effect of oil groove in addition, can reduce wearing and tearing extension pump core's life.

The pump cover 1 is provided with an oil inlet 11 and an oil groove 12 communicated with the oil inlet.

The pump chamber 3 is provided with an oil outlet 31.

The durable 3000H pump core performance of the impeller structure of the automobile fuel pump is attenuated within 15% under the high-pressure environment operation, and the attenuation is remarkably improved compared with the original 35%.

Claims

1. The utility model provides an automobile fuel pump impeller structure, includes pump cover (1), pump chamber (3) and establishes impeller body (2) between pump cover and pump chamber, impeller body (2) and the coaxial setting of pump cover (1) impeller body (2) center is equipped with shaft hole (20), and the excircle inboard of impeller body (2) is equipped with the blade annular, around the blade that is equipped with the polylith slope, characterized by in this blade annular: a plurality of arc-shaped oil guide grooves (21) are equidistantly arranged on the inner side close to the blade ring groove, and one end of each oil guide groove (21) is provided with a balance hole (22); impeller body (2) openly are located shaft hole (20) and multichannel and lead the region between oil groove (21) and be equipped with openly and subtract glued structure (23) impeller body (2) reverse side is located shaft hole (20) and multichannel and leads the region between oil groove (21) and be equipped with the reverse side and subtract glued structure (24), advances jiao kou (25) when leaving impeller body shaping on this reverse side subtracts glued structure (24).

2. The automotive fuel pump impeller structure of claim 1, characterized in that: the front glue reducing structure (23) and the back glue reducing structure (24) are both circular rings sinking for 0.5 mm.

3. The automotive fuel pump impeller structure according to claim 1 or 2, characterized in that: the balance hole (22) penetrates through the impeller body (2).

4. The automobile fuel pump impeller structure according to claim 1, characterized in that: the pump cover (1) is provided with an oil inlet (11) and an oil groove (12) communicated with the oil inlet.

5. The automotive fuel pump impeller structure of claim 1, characterized in that: the pump chamber (3) is provided with an oil outlet (31).