CN213450823U

CN213450823U - Novel cycloid rotor pump

Info

Publication number: CN213450823U
Application number: CN202022597293.XU
Authority: CN
Inventors: 杨章福; 涂山奎; 陈波
Original assignee: Chongqing Huafu Industrial Co ltd
Current assignee: Chongqing Huafu Industrial Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-06-15
Anticipated expiration: 2030-11-11

Abstract

The utility model provides a novel cycloid impeller pump, is cycloid's inner rotor and outer rotor including the molded lines, inner rotor eccentric mounting is in the outer rotor, and the axle center of inner rotor is located the outer rotor under, installs back in the outer rotor when the inner rotor, and in the great position department of relative sliding velocity, the intertooth space clearance is 0.06 mm-0.08 mm, and lower extreme meshing department at the impeller pump, the clearance between inner rotor addendum and the outer rotor tooth root is 0.15 mm-0.20 mm, and the clearance between inner rotor tooth root and the outer rotor addendum is 0.10 mm-0.15 mm. After the installation, all the gear teeth are not contacted simultaneously, so that the processing progress of the inner rotor and the outer rotor is reduced, and the installation is easy; because the gear teeth have certain gaps at the position with higher relative sliding speed, the gear teeth are not in relative contact, and the rapid abrasion is avoided; and the lower end of the rotor pump is engaged with a certain gap, so that lubricating oil can be stored, and the occurrence of interference can be effectively prevented.

Description

Novel cycloid rotor pump

Technical Field

The utility model relates to a zero technical field of cycloid impeller pump, concretely relates to novel cycloid impeller pump.

Background

The rotor oil pump is an oil supply device of a gearbox, and has the characteristics of small volume, simple structure, low noise, stable operation and high volumetric efficiency. With the development of the automobile industry, the demand is increasing. The cycloid type oil pump has the advantages of simple structure, small volume, light weight and large oil delivery capacity. The cycloidal rotor pump has meshed inner and outer rotors, less teeth, compact structure and small number of parts. Therefore, the industrial application of the cycloid type oil pump is increasingly widespread.

In the prior art, the molded lines of the inner rotor and the outer rotor of the cycloid type are designed according to the cycloid theory, so that the teeth are meshed simultaneously, the gear teeth are easy to wear at the position with a large relative sliding speed, the machining precision is high, and the assembly is difficult.

SUMMERY OF THE UTILITY MODEL

The utility model discloses plan to provide a novel cycloid impeller pump, the assembly is simple, and is difficult wearing and tearing in the great department of relative sliding speed.

Therefore, the utility model discloses the technical scheme who adopts does: the utility model provides a novel cycloid impeller pump, is cycloid's inner rotor and outer rotor including the molded lines, inner rotor eccentric mounting is in the outer rotor, and the axle center of inner rotor is located the outer rotor under, installs back in the outer rotor when the inner rotor, in the great position department of relative sliding velocity, and the intertooth space clearance between inner rotor and the outer rotor is 0.06 mm-0.08 mm, and in the lower extreme meshing department of impeller pump, the clearance between inner rotor addendum and the outer rotor dedendum is 0.15 mm-0.20 mm, and the clearance between inner rotor dedendum and the outer rotor addendum is 0.10 mm-0.15 mm.

Preferably, after the inner rotor is installed in the outer rotor, the gap between teeth between the teeth of the inner rotor and the teeth of the outer rotor is 0.04 mm-0.05 mm at the upper end of the rotor pump.

More preferably, the inner rotor is provided with 7 convex teeth, and the outer rotor is provided with 8 concave teeth.

The utility model has the advantages that:

(1) after the installation, all the gear teeth are not contacted simultaneously, so that the processing progress of the inner rotor and the outer rotor is reduced, and the installation is easy;

(2) because the gear teeth have certain gaps at the position with higher relative sliding speed, the gear teeth are not in relative contact, thereby avoiding rapid abrasion and prolonging the service life;

(3) at the lower extreme meshing department of rotor pump, there is certain clearance between inner rotor and the outer rotor, can store lubricating oil, and convenient lubrication can effectively prevent to take place to interfere between inner rotor and the outer rotor.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the outer rotor of the present embodiment.

Fig. 3 is a schematic structural diagram of the inner rotor of the present embodiment.

Detailed Description

The invention will be further described by way of examples with reference to the accompanying drawings:

referring to fig. 1-3, a novel cycloid rotor pump is composed of an inner rotor 1 and an outer rotor 2, the main profiles of which are cycloid, the inner rotor 1 is eccentrically installed in the outer rotor 2, the axis of the inner rotor 1 is positioned right below the outer rotor 2, when the inner rotor 1 is installed in the outer rotor 2, the gap between teeth between the inner rotor 1 and the outer rotor 2 is 0.06 mm-0.08 mm at the position with larger relative sliding speed, and at the meshing position of the upper end of the rotor pump, the gap between the tooth top of the inner rotor 1 and the tooth bottom of the outer rotor 2 is 0.15 mm-0.20 mm, and the gap between the tooth bottom of the inner rotor 1 and the tooth top of the outer rotor 2 is 0.10 mm-0.15 mm.

After the inner rotor 1 is installed in the outer rotor 2, at the sealing end, the gap between teeth between the tooth top of the inner rotor 1 and the tooth top of the outer rotor 2 is 0.04 mm-0.05 mm, and the gap between the teeth is small, so that the sealing performance is good.

According to the data of the inner rotor profile shown in table 1, the inner rotor shown in fig. 3 can be obtained, the inner rotor 1 is provided with 7 convex teeth, the diameter of the tip circle is 39.6mm, the diameter of the root circle is 29.6mm, the tip clearance at the tip position is 0.03-0.12 mm, and the eccentricity is 2.5 mm.

TABLE 1 inner rotor profile

According to the outer rotor profile data shown in table 2, the outer rotor shown in fig. 2 can be obtained, the outer rotor 2 is provided with 8 concave teeth, the pitch circle diameter of the outer rotor is 40mm, the crest circle diameter is 34.68mm, the root circle diameter is 45mm, the crest gap at the crest position is 0.03-0.12 mm, and the eccentricity is 2.5 mm.

TABLE 2 outer rotor profile data

When the inner rotor 1 is installed in the outer rotor 2 with an eccentricity e, as shown in fig. 1, the outer rotor 2 is wound around the rotation center O₂At an angular velocity ω₂Rotating clockwise, the inner rotor 1 is around the centre of rotation O₁At an angular velocity ω₁When rotating clockwise, the left side is the oil inlet chamber, i.e. the low pressure area, and the right sideThe faces are oil drainage cavities, i.e. high pressure zones.

Meanwhile, the gear tooth clearance between the inner rotor 1 and the outer rotor 2 is 0.06 mm-0.08 mm at the position with larger relative sliding speed, namely the position C and the vicinity in the figure 1, so that the inner rotor 1 and the outer rotor 2 are not contacted with each other, the rapid wear is avoided, the service life can be prolonged, the gear tooth clearance is 0.04 mm-0.05 mm at the upper end of the rotor pump, namely the position D, E, F in the figure 1, the gear tooth clearance is 0.15 mm-0.20 mm at the lower end meshing position of the rotor pump, namely the position A clearance in the figure 1 and the gear tooth clearance is 0.10 mm-0.15 mm at the position B in the figure 1, so that lubricating oil can be stored between the inner rotor 1 and the outer rotor 2, the lubrication is convenient, and the interference can be prevented.

Claims

1. The utility model provides a novel cycloid impeller pump, includes that the molded lines is inner rotor (1) and outer rotor (2) of cycloid, its characterized in that: inner rotor (1) eccentric mounting is in outer rotor (2), just the axle center of inner rotor (1) is located outer rotor (2) under, installs back in outer rotor (2) when inner rotor (1), in the great position department of relative sliding velocity, the intertooth space clearance between inner rotor (1) and outer rotor (2) is 0.06 mm-0.08 mm, and at the lower extreme meshing department of rotor pump, the clearance between inner rotor (1) addendum and outer rotor (2) dedendum is 0.15 mm-0.20 mm, and the clearance between inner rotor (1) dedendum and outer rotor (2) addendum is 0.10 mm-0.15 mm.

2. The new gerotor pump of claim 1, further comprising: after the inner rotor (1) is installed in the outer rotor (2), the gap between teeth between the tooth top of the inner rotor (1) and the tooth top of the outer rotor (2) is 0.04-0.05 mm at the upper end of the rotor pump.

3. The new gerotor pump of claim 1, further comprising: the inner rotor (1) is provided with 7 convex teeth, and the outer rotor (2) is provided with 8 concave teeth.