CN201209551Y

CN201209551Y - Perforated rotor type lubricating oil pump

Info

Publication number: CN201209551Y
Application number: CNU200820053342XU
Authority: CN
Inventors: 许仲秋; 佘笑梅
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Oil Pump Co Ltd
Priority date: 2008-05-30
Filing date: 2008-05-30
Publication date: 2009-03-18
Anticipated expiration: 2018-05-30

Abstract

The utility model relates to a rotor type engine oil pump with a hole; the rotor type engine oil pump comprises a pump (1), a transmission shaft, an inner rotor (3), an outer rotor (4), a pump cover (5), an idler shaft (6) and a spacer ring; the inner rotor (3) and the outer rotor (4) are arranged in the pump (1); the transmission shaft is arranged in the axle hole of the pump (1); the upper end of the transmission shaft is connected with a transmission gear, and the lower end is connected with the inner rotor (3); the pump cover (5) is arranged on the pump (1); the axial terminal of the idler shaft (6) is pressed on the spacer ring; a lubricating oil hole on the idler shaft (6) is a slant oil hole; the inner rotor (3) is provided with a through hole (31), and the outer rotor (4) is provided with another through hole (41). The rotors are light-weighted, so that raw materials can be saved, the chance of gas etching in an oil chamber is small, the service life is long and the working noise is low.

Description

Perforated rotor formula oil pump

Technical field

The utility model relates to a kind of rotor-type oil pump, particularly a kind of perforated rotor formula oil pump.

Background technique

Present rotor-type oil pump, it mainly comprises the pump housing, transmission shaft, internal rotor, external rotor, pump cover, idler shaft and positioning ring, internal rotor and external rotor are installed in the pump housing, transmission shaft is installed in the axis hole of the pump housing, its upper end connects driving gear, and its lower end connects internal rotor, and pump cover is installed on the pump housing, the axle head of idler shaft is fitted on the positioning ring, and the oilhole on the idler shaft is an inclined oil hole of air.There is following deficiency in this rotor-type oil pump: because internal rotor and external rotor are bigger and thick, when the oil pump rotating speed is higher, because the external rotor external diameter is big, thereby linear velocity is big, oil sucting cavity is darker, will cause oil sucting cavity can't be full of fluid, thereby cavitate, fuel-displaced cavity pressure pulse is big, causes taking place excessive noise.

Summary of the invention

The purpose of this utility model is to overcome the above-mentioned deficiency of prior art and a kind of perforated rotor formula oil pump is provided, and its rotor weight is light, and the cavitation erosion possibility occurrence is few in the oil pocket, long service life, and operating noise is low.

The technical solution of the utility model is: a kind of perforated rotor formula oil pump, it comprises the pump housing, transmission shaft, internal rotor, external rotor, pump cover, idler shaft and positioning ring, internal rotor and external rotor are installed in the pump housing, transmission shaft is installed in the axis hole of the pump housing, its upper end connects driving gear, its lower end connects internal rotor, and pump cover is installed on the pump housing, has through hole on the external rotor.

The further technological scheme of the utility model is: have through hole on the described internal rotor.

Another technological scheme of the utility model is: a kind of perforated rotor formula oil pump, it comprises the pump housing, transmission shaft, internal rotor, external rotor, pump cover, idler shaft and positioning ring, internal rotor and external rotor are installed in the pump housing, transmission shaft is installed in the axis hole of the pump housing, its upper end connects driving gear, its lower end connects internal rotor, and pump cover is installed on the pump housing, has through hole on the internal rotor.

The utility model compared with prior art has following characteristics:

The utility model has alleviated rotor weight so on the one hand because internal rotor and/or external rotor are provided with through hole, has saved raw material; Can make oil sucting cavity be full of oil fully on the other hand, oil outlet oil extraction resistance reduces, and the oil closed cavity that the inner and outer rotors engagement forms can be transported to out oil pocket to oil suction chamber fluid more stably, be full of oil fully and reduce cavitation erosion and take place owing to advancing oil sucting cavity, improved the life-span of rotor, reduced rotor being eager to excel to fatigue resistance, and because oil outlet oil drain out resistance reduces, fluid steadily is transported to out oil pocket, reduced pressure pulse greatly, this also all makes the noise of oil pump obtain very big improvement, helps environmental protection.

Below in conjunction with the drawings and specific embodiments detailed structure of the present utility model is further described.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is the rear view of Fig. 1;

Fig. 4 is the structural representation of internal rotor of the present utility model and external rotor Fig. 1;

Fig. 5 is the internal rotor of oil pump of prior art and the structural representation of external rotor.

Embodiment

Embodiment 1

Shown in accompanying drawing 1-4: a kind of perforated rotor formula oil pump, it comprises the pump housing 1, transmission shaft 2, internal rotor 3, external rotor 4, pump cover 5, idler shaft 6 and positioning ring 7, internal rotor 3 and external rotor 4 are installed in the pump housing 1, transmission shaft 2 is installed in the axis hole of the pump housing 1, its upper end connects driving gear 21, and its lower end connects internal rotor 3, and pump cover 5 is installed on the pump housing 1, the axle head of idler shaft 6 is fitted on the positioning ring 7, and the oilhole on the idler shaft 6 is an inclined oil hole of air; Having on the internal rotor 3 on through hole 31 or the external rotor 4 and have through hole 41, also can be to have on the internal rotor 3 on through hole 31 and the external rotor 4 to have through hole 41.

The utility model is not limited to above-mentioned concrete structure, just drops within the protection domain of the present utility model so long as have the rotor-type oil pump of through hole on internal rotor 3 and/or external rotor 4.

Claims

1, a kind of perforated rotor formula oil pump, it comprises the pump housing (1), transmission shaft (2), internal rotor (3), external rotor (4), pump cover (5), idler shaft (6) and positioning ring (7), internal rotor (3) and external rotor (4) are installed in the pump housing (1), transmission shaft (2) is installed in the axis hole of the pump housing (1), its upper end connects driving gear (21), its lower end connects internal rotor (3), and pump cover (5) is installed on the pump housing (1), it is characterized in that: have through hole (41) on the external rotor (4).

2, perforated rotor formula oil pump according to claim 1 is characterized in that: have through hole (31) on the described internal rotor (3).

3, a kind of perforated rotor formula oil pump, it comprises the pump housing (1), transmission shaft (2), internal rotor (3), external rotor (4), pump cover (5), idler shaft (6) and positioning ring (7), internal rotor (3) and external rotor (4) are installed in the pump housing (1), transmission shaft (2) is installed in the axis hole of the pump housing (1), its upper end connects driving gear (21), its lower end connects internal rotor (3), and pump cover (5) is installed on the pump housing (1), it is characterized in that: have through hole (31) on the internal rotor (3).