CN211900966U

CN211900966U - Vane type oil pump

Info

Publication number: CN211900966U
Application number: CN201922202726.4U
Authority: CN
Inventors: 蔡宗修
Original assignee: Kunshan Zhimei Mould Co ltd
Current assignee: Kunshan Zhimei Mould Co ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-11-10
Anticipated expiration: 2029-12-10

Abstract

The utility model discloses a vane type oil pump, which comprises a stator and a rotor eccentrically arranged in the stator, wherein a plurality of holding tanks are arranged on the rotor, the holding tanks extend from the rotor to the center of the rotor towards one side of the stator, and vanes are arranged in the holding tanks; the device also comprises a blade auxiliary device; the blade auxiliary device comprises a spring and a pin, one end of the spring is connected with the bottom end of the accommodating groove, the other end of the spring is connected with the blade, the expansion amount of the spring is changed along with the rotation of the rotor in the stator, and the pin is movably arranged in the accommodating groove and acts on the blade together with the pin to enable the blade to be abutted against the stator. By using the vane type oil pump, the vanes are not influenced by the rotating speed of the rotor and can be always kept in a state of offsetting against the stator, so that the oil pump is ensured to work according to the preset oil absorption and oil discharge, and the working efficiency of the oil pump is ensured.

Description

Vane type oil pump

Technical Field

The utility model relates to a hydraulic equipment field especially relates to a vane type oil pump.

Background

The vane pump is a pump in which vanes in a rotor groove are in contact with a pump casing (stator ring) to press sucked liquid from an oil inlet side to an oil discharge side. When the vane pump rotor rotates, the tip of the vane clings to the inner surface of the stator under the action of centrifugal force and pressure oil. Like this two blades constitute sealed work and hold the chamber with rotor and stator internal surface, because stator and rotor are eccentric installation, at the rotatory in-process of rotor, sealed work holds the chamber and forms the negative pressure by little increase earlier, and sealed work holds the chamber and diminishes by big again after oil is inhaled, and oil is discharged to realize oil absorption and oil extraction. The sealing effect of the sealed working cavity directly influences the internal pressure, thereby influencing the working efficiency of the oil pump. The sealed working chamber is formed by two vanes, the inner surfaces of the rotor and the stator, so that how to ensure that the tip parts of the two vanes are tightly attached to the inner surface of the stator is very important.

Disclosure of Invention

The utility model aims at providing a vane type oil pump through using this vane type oil pump, makes the blade not receive rotor speed's influence, can both be in the state that offsets with the stator all the time to guarantee that the oil pump carries out work according to predetermined oil absorption and oil extraction volume, guarantee its work efficiency.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a vane type oil pump comprises a stator and a rotor eccentrically arranged in the stator, wherein a plurality of accommodating grooves are formed in the rotor, the accommodating grooves extend from one side, facing the stator, of the rotor to the center of the rotor, and vanes are arranged in the accommodating grooves; the device also comprises a blade auxiliary device;

the blade auxiliary device comprises a spring and a pin, one end of the spring is connected with the bottom end of the accommodating groove, the other end of the spring is connected with the blade, the expansion amount of the spring is changed along with the rotation of the rotor in the stator, the pin is movably arranged in the accommodating groove, and the spring and the pin jointly act on the blade to enable the blade to be abutted against the stator.

In the technical scheme, the accommodating groove is long-strip-shaped, and the groove bottom of the accommodating groove is an arc-shaped mechanism.

In the above technical scheme, the number of the springs includes two, and the two springs are arranged at two ends of the groove bottom.

In the technical scheme, the pin is cylindrical and is positioned between the two springs, and the pin is abutted against the blade under the action of oil pressure in the accommodating groove.

In the above technical scheme, a first fixing hole is arranged at the center of the tank bottom, and one end of the spring facing the tank bottom is embedded in the first fixing hole.

In the above technical scheme, a second fixing hole is formed in one end, opposite to the groove bottom, of the blade, the second fixing hole is opposite to the first fixing hole, and one end, facing the blade, of the spring is embedded in the second fixing hole.

In the technical scheme, the accommodating grooves are distributed on the rotor at equal intervals, and are symmetrically arranged relative to the center of the rotor.

In the above technical solution, one end of the blade opposite to the stator is provided with a plurality of balance holes, the balance holes are communicated with the second fixing holes, and the diameters of the balance holes are smaller than the diameter of the second fixing holes.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

1. the utility model discloses in be provided with blade auxiliary device in the blade type oil pump, blade auxiliary device includes spring and pin, spring one end links to each other with the holding tank bottom, the spring other end links to each other with the blade, the flexible volume of spring changes along with the rotation of rotor in the stator, be in compression state because of the spring in the holding tank, consequently, can continuously push the blade to the stator, the state that makes the surface of blade and stator keep offsetting, and still be provided with the pin in the holding tank, because the pin receives the effect of oil pressure in the holding tank, push it to the blade, therefore, it also can produce a thrust to the blade, when rotor rotational speed is too fast, the pin has certain rigidity, its vertical action is on the blade, produce the guide effect to the blade, prevent the blade skew.

2. The tank bottom of holding tank is the arc structure, and to present automated processing equipment, the arc structure is more convenient for the processing of lathe, has simplified its degree of difficulty that sets up on the rotor, has improved the machining precision.

3. The first fixing hole is formed in the center of the bottom of the groove, the second fixing hole is formed in the end, opposite to the groove bottom, of each blade, the two ends of each spring are embedded into the first fixing hole and the second fixing hole respectively, it is guaranteed that the springs cannot be deviated by the blades in the rotating process of the rotor, the blades are continuously acted, the first fixing holes are formed in the center of the groove bottom, the acting force direction is perpendicular to the surface of the stator, and the force is evenly applied.

Drawings

FIG. 1 is a schematic view of a rotor structure of the present invention;

FIG. 2 is a schematic view of a blade according to the present invention;

FIG. 3 is a schematic view of the assembly of the middle blade and the auxiliary device of the present invention

Wherein: 1. a rotor; 2. accommodating grooves; 3. a blade; 4. a spring; 5. the bottom of the tank; 6. a balance hole; 7. a second fixing hole; 8. and a pin.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

the first embodiment is as follows: referring to fig. 1 to 3, a vane type oil pump includes a stator and a rotor 1 eccentrically disposed in the stator, wherein the rotor 1 is provided with a plurality of accommodating grooves 2, the accommodating grooves 2 extend from one side of the rotor 1 facing the stator to the center of the rotor 1, and vanes 3 are disposed in the accommodating grooves 2;

the blade auxiliary device comprises a spring 4 and a pin 8, one end of the spring 4 is connected with the bottom end of the accommodating groove 2, the other end of the spring 4 is connected with the blade 3, the expansion amount of the spring 4 is changed along with the rotation of the rotor 1 in the stator, the pin 8 is movably arranged in the accommodating groove 2, and the spring 4 and the pin 8 jointly act on the blade 3 to enable the blade 3 to be abutted against the stator.

In the rotating process of the rotor 1, the blade 3 arranged in the accommodating groove 2 is acted by centrifugal force and moves outwards in the accommodating groove 2 so as to be abutted against the surface of the stator, but when the rotating speed is low and the blade is used for a long time, the resistance of internal oil stain prevents the blade 3 from moving outwards smoothly, namely, the blade cannot be abutted against the surface of the stator so as not to form a sealed working accommodating cavity with the stator and the rotor 1, when the working accommodating cavity is opposed to an oil inlet, the oil absorption effect of the working accommodating cavity is influenced due to the change of pressure in the working accommodating cavity, the later oil discharge effect is also influenced, through arranging the spring 4 in the accommodating groove 2, one end of the spring 4 is connected with the groove bottom 5 of the accommodating groove, the other end of the spring 4 is connected with the blade 3, in the rotating process of the rotor 1, the expansion amount of the spring 4 can be changed, so that the original moving track of the blade 3 is not influenced, but, therefore, the vane 3 is continuously pushed toward the stator to keep the vane 3 in a state of being abutted against the surface of the stator, the pin 8 is provided in the housing groove 2, and the pin 8 is pushed toward the vane 3 by the oil pressure in the housing groove 2, so that it also generates a thrust force to the vane 3, and when the rotor 1 rotates at an excessively high speed, the pin 8 has a certain rigidity and acts perpendicularly on the vane 3 to generate a guiding action to the vane 3 to prevent the vane 3 from being deviated.

Referring to fig. 1, the accommodating groove 2 is in a long strip shape, and the bottom 5 of the accommodating groove 2 is in an arc-shaped structure. The arc-shaped structure is more convenient for the processing of a lathe, simplifies the difficulty of the arrangement of the arc-shaped structure on the rotor 1 and improves the processing precision. The number of the springs 4 comprises two, the two springs 4 are arranged at two ends of the groove bottom 5, and the springs 4 are arranged at two ends of the groove bottom 5, so that the blades 3 are not easy to incline in the rotating process of the rotor 1.

As shown in fig. 3, the pin 8 is cylindrical, and the pin 8 is located between the two springs 4 and abuts against the blade 3 under the action of oil pressure in the receiving groove.

In order to ensure that the spring 4 always generates a thrust force on the blade 3 and is not influenced by the rotating speed of the rotor 1, a first fixing hole is formed in the center of the groove bottom 5, and one end, facing the groove bottom 5, of the spring 4 is embedded in the first fixing hole. A second fixing hole 7 is formed in one end, opposite to the groove bottom 5, of the blade 3, the second fixing hole 7 is opposite to the first fixing hole, and one end, facing the blade 3, of the spring 4 is embedded in the second fixing hole 7, as shown in fig. 3.

Referring to fig. 1, the accommodating grooves 2 are distributed on the rotor 1 at equal intervals, and the accommodating grooves 2 are arranged in a central symmetry manner with respect to the rotor 1.

Referring to fig. 2, the end of the vane 3 opposite to the stator is provided with a plurality of balancing holes 6, the balancing holes 6 are communicated with the second fixing holes 7, and the diameter of the balancing holes 6 is smaller than that of the second fixing holes.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A vane-type oil pump characterized by: the rotor is eccentrically arranged in the stator, a plurality of accommodating grooves are formed in the rotor, the accommodating grooves extend from one side, facing the stator, of the rotor to the center of the rotor, and blades are arranged in the accommodating grooves; the device also comprises a blade auxiliary device;

2. The vane-type oil pump according to claim 1, wherein: the holding tank is rectangular shape, the tank bottom of holding tank is arc mechanism.

3. The vane oil pump as set forth in claim 2, wherein: the number of the springs comprises two, and the two springs are arranged at two ends of the groove bottom.

4. The vane oil pump as set forth in claim 3, wherein: the pin is cylindric, the pin is located two between the spring, the pin is in the holding tank oil pressure effect down with the blade offsets.

5. The vane oil pump as set forth in claim 2, wherein: the center of the tank bottom is provided with a first fixing hole, and one end, facing the tank bottom, of the spring is embedded in the first fixing hole.

6. The vane oil pump as set forth in claim 5, wherein: the blade with the opposite one end of tank bottom is provided with the second fixed orifices, the second fixed orifices with first fixed orifices is relative, the spring orientation the one end of blade is embedded in the second fixed orifices.

7. The vane-type oil pump according to claim 1, wherein: the holding tank is in be equidistant distribution on the rotor, just the holding tank is relative rotor centrosymmetric sets up.

8. The vane oil pump as set forth in claim 6, wherein: the blade with the one end that the stator is relative is provided with a plurality of balanced holes, balanced hole with the second fixed orifices communicates with each other, the diameter in balanced hole is less than the diameter of second fixed orifices.