CN113586450A

CN113586450A - Vacuum pump

Info

Publication number: CN113586450A
Application number: CN202110757646.4A
Authority: CN
Inventors: 王丽娜; 程建军; 刘欣
Original assignee: Individual
Current assignee: Xiamen Micro Energy Electronic Technology Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-11-02
Anticipated expiration: 2041-07-05
Also published as: CN113586450B

Abstract

The invention relates to a vacuum pump, comprising: the pump body is provided with an air inlet channel and an air outlet channel; the end cover is fixedly connected with the pump body, a cylindrical pump cavity is formed between the end cover and the pump body, and the end cover is composed of a cover body and a plurality of cover plates which are rotatably connected to the cover body through rotating shafts; the input shaft is rotatably arranged on the pump body and extends into the pump cavity, and the input shaft is eccentrically arranged; the rotor is arranged in the pump cavity and fixedly connected with the input shaft, a plurality of blades are arranged on the rotor in a sliding mode, and when the rotor rotates, the end portions of the blades can abut against the inner wall of the pump cavity, so that the pump cavity is divided into a plurality of sub-containing cavities; the control assembly, the advantage of the invention lies in: when the pressure difference between the air pressure of the air inlet channel and the air pressure of the air outlet channel is higher than a preset value, the control assembly can control the cover plate to rotate, so that the pump cavity is communicated with the outer side of the end cover, and the vacuum pump fails.

Description

Vacuum pump

Technical Field

The invention relates to the technical field of vacuum pumps, in particular to a vacuum pump.

Background

The vacuum pump is a rotary variable-capacity vacuum pump, can be used in a wider pressure range by being matched with a backing pump, and has a mechanical device with larger pumping speed and insensitivity to dust and water vapor contained in the pumped gas. The vacuum pump is widely applied to the fields of plastic machinery, pesticide chemical industry, dye chemical industry, tile machinery, low-temperature equipment, paper making machinery, pharmaceutical chemical industry, food machinery, industrial electric furnaces, electronic industry, vacuum equipment, chemical fertilizers, metallurgy, petroleum, mines, foundation treatment and the like. When the vacuum pump in the prior art is used on an automobile, usually, an engine driving shaft always drives an automobile vacuum pump rotor to rotate, so that the maximum vacuum degree is always kept in a booster, but the vacuum degree does not need to be maintained at the maximum level which can be reached by one vacuum pump when the booster works, so that the vacuum pump always in a working state consumes a lot of unnecessary energy, the oil consumption of the engine is increased, and the vacuum pump is designed for solving the problems.

Disclosure of Invention

In view of the above, it is necessary to provide a vacuum pump in view of the above problems.

The invention discloses a vacuum pump, which comprises: the pump body is provided with an air inlet channel and an air outlet channel; the end cover is fixedly connected with the pump body, a cylindrical pump cavity is formed between the end cover and the pump body, and the end cover is composed of a cover body and a plurality of cover plates which are rotatably connected to the cover body through rotating shafts; the input shaft is rotatably arranged on the pump body and extends into the pump cavity, and the input shaft is eccentrically arranged; the rotor is arranged in the pump cavity and fixedly connected with the input shaft, a plurality of blades are arranged on the rotor in a sliding mode, and when the rotor rotates, the end portions of the blades can abut against the inner wall of the pump cavity, so that the pump cavity is divided into a plurality of sub-containing cavities;

and when the pressure difference between the air pressure of the air inlet channel and the air pressure of the air outlet channel is higher than a preset value, the control assembly can control the cover plate to rotate, so that the pump cavity is communicated with the outer side of the end cover, and the vacuum pump fails.

In one embodiment, a regulating cavity is formed in the pump body, the air inlet channel and the air outlet channel are both communicated with the regulating cavity, the regulating cavity is communicated with the pump cavity through a connecting channel, a first arc-shaped groove and a second arc-shaped groove are formed in one side, located on the pump cavity, of the pump body, the connecting channel is communicated with the first arc-shaped groove, and the air outlet channel is communicated with the second arc-shaped groove.

In one embodiment, the pump body is further provided with a control cavity, the control assembly comprises a control plate, a piston member and a plurality of toggle members, the control plate is rotatably arranged in the control cavity, the piston member is slidably arranged in the adjustment cavity, the toggle members are fixedly connected to the rotating shaft in a one-to-one correspondence manner, a first toggle protrusion and a plurality of second toggle protrusions are arranged on the control plate, a first toggle groove is arranged on the piston member, the first toggle protrusion is connected to the first toggle groove, a second toggle groove is arranged on the toggle member, the second toggle protrusions are arranged in the second toggle groove in a one-to-one correspondence manner, when the pressure difference between the air pressure in the air outlet channel and the air pressure in the air inlet channel is higher than a preset value, the piston member can move from a first working position to a second working position, so as to block the air inlet channel and the connecting channel, and the control panel is driven to rotate in the positive direction, so that the stirring piece can be driven to rotate, the rotating shaft is driven to rotate in the positive direction, and the cover plate is opened.

In one embodiment, the control assembly further includes an elastic member, the elastic member is disposed in the adjustment cavity, one end of the elastic member abuts against an inner wall of the adjustment cavity, and the other end of the elastic member abuts against the piston member, and when a pressure difference between air pressure in the air outlet channel and air pressure in the air inlet channel is lower than a preset value, the elastic member can drive the piston member to move from the second working position to the first working position.

In one embodiment, the rotor is provided with 6 vanes, and the vanes divide the pump chamber into 6 sub-chambers.

In one embodiment, the sub-volume communicates with the first or second arcuate slot.

In one embodiment, the vacuum pump has 6 cover plates, and 6 cover plates are uniformly distributed on the cover body in a ring shape.

The invention has the advantages that:

1. by arranging the piston piece, when the pressure difference between the gas pressure in the gas inlet channel and the gas pressure in the gas outlet channel is larger than the elasticity of the elastic piece to the piston piece, the piston piece moves from the first working position to the second working position to open the cover plate, so that the vacuum pump fails, and the energy consumption of the vacuum pump is reduced;

2. the cover plate is arranged to control the communication between the pump cavity and the outside, so that the working state of the vacuum pump can be controlled, and the vacuum pump is simple and convenient;

3. the working state of the vacuum pump is controlled by matching the elastic piece and the piston piece, a complex electric control device is not needed, and the vacuum pump is simple, effective and low in cost.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 2 in accordance with the present invention;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 2 in accordance with the present invention;

FIG. 6 is a cross-sectional view taken along line E-E of FIG. 2 in accordance with the present invention;

FIG. 7 is a cross-sectional view of the vacuum pump of the present invention in the event of a failure;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7 in accordance with the present invention;

FIG. 9 is a cross-sectional view taken along line C-C of FIG. 8 in accordance with the present invention;

fig. 10 is a cross-sectional view taken along the direction D-D of fig. 8 in accordance with the present invention.

In the figure, the pump body 1, the air inlet channel 11, the air outlet channel 12, the pump cavity 13, the adjusting cavity 14, the first arc-shaped groove 15, the second arc-shaped groove 16, the control cavity 17, the connecting channel 18, the end cover 2, the cover body 21, the cover plate 22, the rotating shaft 23, the input shaft 3, the rotor 4, the blades 41, the control plate 51, the first toggle protrusion 511, the second toggle protrusion 512, the piston member 52, the first toggle groove 521, the toggle member 53, the second toggle groove 531 and the elastic member 54.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 6, the present invention discloses a vacuum pump, including: the pump body 1, end cover 2, input shaft 3, rotor 4, control assembly. The pump body 1 is provided with an air inlet channel 11 and an air outlet channel 12; the end cover 2 is fixedly connected with the pump body 1, a cylindrical pump cavity 13 is formed between the end cover 2 and the pump body 1, and the end cover 2 is composed of a cover body 21 and a plurality of cover plates 22 which are rotatably connected to the cover body 21 through a rotating shaft 23; the input shaft 3 is rotatably arranged on the pump body 1 and extends into the pump cavity 13, and the input shaft 3 is eccentrically arranged; the rotor 4 is arranged in the pump cavity 13 and fixedly connected with the input shaft 3, the rotor 4 is provided with a plurality of blades 41 in a sliding mode, when the rotor 4 rotates, the end portions of the blades 41 can abut against the inner wall of the pump cavity 13 so as to divide the pump cavity 13 into a plurality of sub-containing cavities, and when the pressure difference between the air pressure of the air inlet channel 11 and the air pressure of the air outlet channel 12 is higher than a preset value, the control assembly can control the cover plate 22 to rotate, so that the pump cavity 13 is communicated with the outer side of the end cover 2, and the vacuum pump fails.

Preferably, as shown in fig. 2, an adjusting cavity 14 is formed in the pump body 1, the air inlet channel 11 and the air outlet channel 12 are both communicated with the adjusting cavity 14, the adjusting cavity 14 is communicated with the pump cavity 13 through a connecting channel 18, a first arc-shaped groove 15 and a second arc-shaped groove 16 are formed in one side of the pump cavity 13 on the pump body 1, the connecting channel 18 is communicated with the first arc-shaped groove 15, and the air outlet channel 12 is communicated with the second arc-shaped groove 16.

Preferably, a control chamber 17 is further formed in the pump body 1, as shown in fig. 3 to 6, the control assembly includes a control plate 51, a piston member 52, and a plurality of toggle members 53, the control plate 51 is rotatably disposed in the control chamber 17, the piston member 52 is slidably disposed in the adjustment chamber 14, the toggle members 53 are fixedly connected to the rotating shaft 23 in a one-to-one correspondence manner, the control plate 51 is provided with a first toggle protrusion 511 and a plurality of second toggle protrusions 512, the piston member 52 is provided with a first toggle groove 521, the first toggle protrusion 511 is connected to the first toggle groove 521, the toggle member 53 is provided with a second toggle groove 531, the second toggle protrusions 512 are disposed in the second toggle groove 531 in a one-to-one correspondence manner, when a pressure difference between an air pressure in the air outlet channel 12 and an air pressure in the air inlet channel 11 is higher than a predetermined value, the piston member 52 can move from the first working position to the second working position, so as to block the air inlet channel 11 and the connecting channel 18, and drive the control plate 51 to rotate in the forward direction, so as to drive the toggle member 53 to rotate, and further drive the rotating shaft 23 to rotate in the forward direction, so as to open the cover plate 22. It will be appreciated that when the cover 22 is opened, the sub-chambers are all in communication with the outside, allowing the vanes 41 to freewheel.

Preferably, the control assembly further includes an elastic member 54, the elastic member 54 is disposed in the adjusting cavity 14, one end of the elastic member 54 abuts against an inner wall of the adjusting cavity 14, and the other end of the elastic member 54 abuts against the piston member 52, when a pressure difference between the air pressure in the air outlet channel 12 and the air pressure in the air inlet channel 11 is lower than a preset value, the elastic member 54 can drive the piston member 52 to move from the second working position to the first working position. It will be appreciated that when the pressure difference is higher than a predetermined value, the piston member 52 moves from the first operating position to the second operating position, compressing the resilient member 54. It should be noted that, since the air outlet channel 12 is communicated with the atmosphere, it can be considered that the air pressure in the air outlet channel 12 is constant, that is, when the pressure in the air inlet channel 11 is less than a certain value, the pressure difference can move the piston member 52 from the first working position to the second working position.

Preferably, the rotor 4 is provided with 6 vanes 41, and the vanes 41 divide the pump cavity 13 into 6 sub-cavities.

Preferably, said sub-volume communicates with said first arc-shaped slot 15 or with said second arc-shaped slot 16.

Preferably, the vacuum pump has 6 cover plates 22, and the 6 cover plates 22 are uniformly distributed on the cover body 21 in a ring shape.

The working mode of the invention is as follows: as shown in fig. 1 to 6, when the vacuum pump is in a normal operation state, the cover plate 22 covers the cover body 21, thus forming a closed pump chamber 13, which, by driving the input shaft 3 in rotation, can bring about the rotation of the rotor 4 and thus of the blades 41, due to the action of centrifugal force, the end of the vane 41 is closely attached to the inner wall of the end cover 2, thereby dividing the pump cavity 13 into 6 sub-cavities, since the first and second arc-

shaped grooves

15 and 16 communicate with the pump chamber 13, and the input shaft 3 is eccentrically disposed, so that the volume of the sub-volume changes constantly as the rotor 4 rotates, and in particular, as shown in figure 1, the volume of the sub-volume communicating with the first arc-shaped groove 15 is continuously increased, the volume of the sub-volume communicating with the second arc-shaped groove 16 is continuously decreased, thereby, the air is caused to enter the pump chamber 13 from the air inlet passage 11 through the connecting passage 18 and then to be discharged from the air outlet passage 12.

When the air pressure in the booster is reduced, so that the air pressure difference between the air outlet channel 12 and the air inlet channel 11 is increased, the piston piece 52 overcomes the elastic force of the elastic piece 54 and moves from the first working position to the second working position, so as to drive the control plate 51 to rotate in the forward direction, as shown in fig. 7 to 10, when the control plate 51 rotates in the forward direction, the toggle piece 53 can be synchronously driven to rotate, so as to drive the cover plate 22 to rotate and open, so that the pump cavity 13 is communicated with the outside, the rotor 4 is in an idle running state, and when the piston piece 52 is located at the second working position, the air inlet channel 11 and the connecting channel 18 can be blocked, so that the vacuum state is maintained in the booster. It is worth mentioning that each sub-cavity is communicated with the outside by arranging 6 cover plates 22 on the cover body 21.

When the air pressure in the booster is increased, the air pressure difference between the air outlet channel 12 and the air inlet channel 11 is reduced, the piston piece 52 moves from the second working position to the first working position under the action of the elastic piece 54, the air inlet channel 11 is communicated with the connecting channel 18, meanwhile, the control plate 51 can be driven to rotate reversely, the cover plate 22 is rotated reversely to seal the pump cavity 13, the rotor 4 can continue to do work, and the air in the booster is pumped out.

The booster circularly works in such a way, so that a certain vacuum degree can be kept in the booster, the power of an engine can be saved, and the energy consumption is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A vacuum pump, characterized in that said vacuum pump comprises:

the pump body is provided with an air inlet channel and an air outlet channel;

the end cover is fixedly connected with the pump body, a cylindrical pump cavity is formed between the end cover and the pump body, and the end cover is composed of a cover body and a plurality of cover plates which are rotatably connected to the cover body through rotating shafts;

the input shaft is rotatably arranged on the pump body and extends into the pump cavity, and the input shaft is eccentrically arranged;

the rotor is arranged in the pump cavity and fixedly connected with the input shaft, a plurality of blades are arranged on the rotor in a sliding mode, and when the rotor rotates, the end portions of the blades can abut against the inner wall of the pump cavity, so that the pump cavity is divided into a plurality of sub-containing cavities;

2. A vacuum pump according to claim 1, wherein a regulating cavity is formed in the pump body, the air inlet channel and the air outlet channel are both communicated with the regulating cavity, the regulating cavity is communicated with the pump cavity through a connecting channel, a first arc-shaped groove and a second arc-shaped groove are formed in one side of the pump cavity on the pump body, the connecting channel is communicated with the first arc-shaped groove, and the air outlet channel is communicated with the second arc-shaped groove.

3. A vacuum pump according to claim 2, wherein the pump body further comprises a control chamber, the control assembly comprises a control panel, a piston member and a plurality of toggle members, the control panel is rotatably disposed in the control chamber, the piston member is slidably disposed in the adjustment chamber, the toggle members are fixedly connected to the rotating shaft in a one-to-one correspondence manner, the control panel is provided with a first toggle protrusion and a plurality of second toggle protrusions, the piston member is provided with a first toggle groove, the first toggle protrusion is connected to the first toggle groove, the toggle members are provided with second toggle grooves, the second toggle protrusions are disposed in the second toggle grooves in a one-to-one correspondence manner, when the pressure difference between the air pressure in the air outlet channel and the air pressure in the air inlet channel is higher than a predetermined value, the piston member can move from a first working position to a second working position, thereby block inlet channel and interface channel to drive the control panel forward rotation, thereby can drive stir the piece rotation, and then drive the rotation axis forward rotation, thereby make the apron open.

4. A vacuum pump according to claim 3, wherein the control assembly further comprises an elastic member, the elastic member is disposed in the adjustment chamber, one end of the elastic member abuts against an inner wall of the adjustment chamber, and the other end of the elastic member abuts against the piston member, and when a pressure difference between the air pressure in the air outlet channel and the air pressure in the air inlet channel is lower than a predetermined value, the elastic member can drive the piston member to move from the second working position to the first working position.

5. A vacuum pump according to claim 2, wherein the rotor is provided with 6 vanes which divide the pump chamber into 6 sub-volumes.

6. A vacuum pump according to claim 5, wherein the sub-volume communicates with the first or second arcuate slot.

7. A vacuum pump according to claim 1, wherein the vacuum pump has 6 cover plates, 6 cover plates being evenly distributed on the cover body in a ring shape.