CN217712931U

CN217712931U - Primary and secondary blade for vane pump

Info

Publication number: CN217712931U
Application number: CN202221006171.1U
Authority: CN
Inventors: 王洪继
Original assignee: Individual
Current assignee: Taizhou Hongyi Hydraulic Servo Technology Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-11-01
Anticipated expiration: 2032-04-28

Abstract

The utility model provides a primary and secondary blade for vane pump, it includes the stator in the vane pump, be equipped with rotatable rotor in the stator, the surface of rotor is equipped with a plurality of blade grooves, be equipped with in the blade groove and follow the inside and outside gliding mother blade in blade groove, mother blade orientation one side of blade groove root is equipped with the cotyledon groove, be equipped with in the cotyledon groove and follow the inside and outside gliding son blade in cotyledon groove, the width of son blade is 1/6 to 1/13 of mother blade width. The utility model discloses a reduce the width that the width ratio between son, the female blade reduces the son blade to make the frictional force between female blade and the stator inner wall reduce, practice thrift electric energy, noise reduction, increase flow, reduce the oil temperature, prevent overheated, prolong the life of impeller pump.

Description

Primary and secondary blade for vane pump

Technical Field

The utility model relates to a hydraulic pump technical field, more specifically say, the utility model relates to a primary and secondary blade for vane pump.

Background

The characteristics of the vane pump, such as compact structure, large flow, high pressure, small pulsation, high efficiency and low noise during working, enable the vane pump to be widely applied to the fields of machine tools, plastic machines, leather machines, forging and pressing machines, engineering machines and the like. With the development of times and the continuous expansion of application fields, under the use requirements of high speed and high pressure, the service life of the blade is difficult to meet the requirements due to over-fast abrasion, therefore, a primary-secondary blade pump is produced, a secondary blade groove is formed in one side edge of the primary blade facing the root part of the blade groove, a secondary blade is arranged in the secondary blade groove, a rotor and a side plate are provided with oil channels, the pressure at the top and the bottom of the primary blade is completely the same, in this way, the force of the primary blade pressing the stator is equal to the force of high-pressure oil acting on the end surface area of the secondary blade, according to the design specification of the primary-secondary blade pump, the width of a common secondary blade is 1/3-1/5 of the width of the primary blade, therefore, the blade pump adopts a primary-secondary blade form, the force of the blade pressing the blade to the stator can be reduced to 1/3-1/5 of the original force, and the service life of the blade can be prolonged by at least 3-5 times. With the rapid development of the injection molding machine industry, the heavy machinery industry and the military industry in more than ten years, higher requirements are put forward on the rotating speed and the pressure of the vane pump.

In order to overcome the problem, the Chinese patent office 2011, 06, 15 discloses an invention patent with the publication number of CN102094816A, and the patent name is 'Primary and secondary vane pump', the primary and secondary vane pump comprises a pump body, a cavity is arranged in the pump body, a rotor is arranged in the cavity, a vane groove is arranged on the rotor, a primary vane is arranged in the vane groove, a secondary vane groove is arranged on the primary vane, a secondary vane is arranged in the secondary vane groove, one end of the secondary vane and the secondary vane form a high-pressure cavity, the other end of the secondary vane and the vane groove form a low-pressure cavity, materials on the side surfaces, matched with the primary vane, of the secondary vane and the primary vane are removed along the length direction to form a chamfer, the chamfer forms a pressure relief channel with the side walls of the secondary vane groove and the side walls of the vane groove, one end of the pressure relief channel is communicated with the high-pressure cavity, and the other end of the pressure relief channel is communicated with the low-pressure cavity. This patent primary and secondary impeller pump reduced the noise, practiced thrift the electric energy and prolonged life, but this patent has increased manufacturing procedure, sets up four pressure release passageways to impeller pump's manufacturing cost has been increased by a wide margin.

Disclosure of Invention

In order to overcome the above-mentioned defects, the utility model discloses the technical problem that needs to solve is: the utility model provides a do not increase manufacturing procedure, do not increase manufacturing cost's prerequisite under, still can realize reducing the mutual acting force between female blade and the stator by a wide margin under the high-speed, high-pressure condition to reduce frictional force, practice thrift the electric energy, prevent overheated, noise reduction, increase of service life.

The utility model provides a technical scheme that prior art exists the problem is: the utility model provides a primary and secondary blade for vane pump, it includes the stator in the vane pump, be equipped with rotatable rotor in the stator, the surface of rotor is equipped with a plurality of blade grooves, be equipped with in the blade groove and follow the inside and outside gliding mother blade in blade groove, mother blade orientation one side of blade groove root is equipped with the cotyledon groove, be equipped with in the cotyledon groove and follow the inside and outside gliding son blade in cotyledon groove, the width of son blade is 1/6 to 1/13 of mother blade width.

Since the primary-secondary vane pump is born, the width of the secondary vane is 1/3-1/5 of the width of the primary vane, which becomes a design specification, and after the primary-secondary vane pump is introduced into China, people regard the design specification as Kingkoyu law, so that no one can consider the improvement from the angle of the width of the secondary vane when subsequently improving the interaction force between the primary vane and the stator, the improvement is from other angles as in the comparison document described in the background technology, the comparison document in the background technology is that the material on two sides is removed from two sides of the secondary vane and the primary vane along the length direction to form four chamfers, the chamfers form pressure relief channels with the side walls of the secondary vane groove and the side walls of the vane groove, and the pressure difference between the top and the bottom of the vane is improved through the four pressure relief channels, so that the purposes of reducing friction force, saving electric energy, reducing noise and prolonging service life are achieved.

The inventor finds out the reason why the son blades are arranged on the mother blades when researching the son blades and obtains inspiration after the action principle, decides to break the Kingo Yu Lai that the width of the son blades is 1/3-1/5 of the width of the mother blades, and solves the problem from the angle of the width of the son blades. Therefore, the technical scheme of the utility model defines the width of the sub-blade as 1/6 to 1/13 of the width of the main blade. According to the action principle of the sub-blades: "the force that female blade pressed to the stator equals the force that high-pressure oil acted on the end face area of the son blade", the thickness of the son blade is invariable, then the end face area of the son blade is in direct proportion with width of the son blade, the son blade width of the utility model discloses technical scheme is less than the son blade width of prior art, therefore, the utility model discloses the force that female blade pressed to the stator is less than the force that the female blade of prior art pressed to the stator, that is to say the friction that the female blade of the utility model technical scheme received is less, then the power that drive the rotor rotation required is also relatively less, practices thrift the electric energy, noise abatement; the abrasion between the female blade and the inner cavity wall of the stator is less, so that the service lives of the female blade and the stator can be prolonged; furthermore, the heat generated by friction is less, so that the primary and secondary vane pumps can be prevented from being overheated; the width of the sub-blade is reduced without increasing the processing procedure and the manufacturing cost; because the width of the sub-blade is smaller, the amount of the inner leakage through the channel is less, and the flow rate can be increased. The utility model discloses these technological effects of technical scheme obtain the experiment through contrast test and verify, and the experimental result sees the record on attaching table A in the embodiment.

As a further technical scheme, the width of the sub-blade is 1/7 to 1/12 of the width of the parent blade.

As a further technical scheme, the width of the sub-blade is 1/8 to 1/11 of the width of the parent blade.

As a further technical scheme, the width of the sub-blade is 1/9 to 1/11 of the width of the main blade.

As a further technical scheme, the width of the sub blade is 1/10 of that of the parent blade.

The utility model discloses a reduce the width that the width ratio between son, the female blade reduces the son blade to make the frictional force between female blade and the stator inner wall reduce, practice thrift electric energy, noise reduction, increase flow, reduce the oil temperature, prevent overheated, prolong the life of impeller pump.

Drawings

FIG. 1 is a schematic cross-sectional view of a master-slave vane pump;

FIG. 2 is a schematic diagram of a prior art structure of the present invention;

fig. 3 is a schematic structural diagram of the present invention.

In the figure: stator 1, female blade 2, male blade 3, rotor 4.

Detailed Description

The present invention will be further described with reference to the following specific embodiments and the accompanying drawings.

Example (b): a primary and secondary blade for a vane pump is shown in figure 1 and comprises a stator in the vane pump, wherein a rotatable rotor is arranged in the stator, a plurality of blade grooves are formed in the outer surface of the rotor, a primary blade capable of sliding inside and outside along the blade grooves is arranged in each blade groove, a secondary blade groove is formed in one side, facing the root of each blade groove, of the primary blade, a secondary blade capable of sliding inside and outside along the secondary blade groove is arranged in each secondary blade groove, and the width of each secondary blade is 1/10 of the width of the primary blade as shown in figure 3.

Test verification: the pump core model of the primary-secondary vane pump in the prior art is 35V-3A, the width of the primary vane is 40.162mm, the thickness is 3.114mm, and the height is 18.100mm; the width of the sub-blade is 8.42mm (marked as 8mm of sub-width), the thickness is 3.114mm, and the height is 10.13mm; the pump core model of the utility model is also 35V-3A, the width of the female blade is 40.162mm, the thickness is 3.114mm, and the height is 18.100mm; the width of the sub-blades was 4mm (denoted as sub-width 4 mm), the thickness was 3.114mm, and the height was 10.13mm. Comparative tests were carried out on the same test bed according to the test method of the JB-T7040-1993 hydraulic vane pump published by the ministry of the mechanical industry, and the test results are recorded in the attached Table A.

Attached table A

Can find out from the test data, the technical scheme of the utility model gain beneficial effect and effectively verify.

The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.

Details not described in the present specification belong to the prior art known to those skilled in the art.

Claims

1. The primary and secondary blades for the vane pump comprise a stator in the vane pump, a rotatable rotor is arranged in the stator, a plurality of blade grooves are formed in the outer surface of the rotor, primary blades capable of sliding inside and outside along the blade grooves are arranged in the blade grooves, a secondary blade groove is formed in one side, facing the root part of the blade grooves, of the primary blades, and a secondary blade capable of sliding inside and outside along the secondary blade groove is arranged in the secondary blade groove.

2. Primary and secondary vanes for a vane pump according to claim 1, wherein the width of the secondary vanes is 1/7 to 1/12 of the width of the primary vanes.

3. Primary and secondary vanes for a vane pump according to claim 2, wherein the width of the secondary vanes is 1/8 to 1/11 of the width of the primary vanes.

4. Primary and secondary vanes for a vane pump according to claim 2, wherein the width of the secondary vanes is 1/9 to 1/11 of the width of the primary vanes.

5. Primary and secondary vanes for a vane pump according to claim 2, wherein the width of the secondary vane is 1/10 of the width of the primary vane.