CN214273947U - Vacuum pump structure - Google Patents
Vacuum pump structure Download PDFInfo
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- CN214273947U CN214273947U CN202022362041.9U CN202022362041U CN214273947U CN 214273947 U CN214273947 U CN 214273947U CN 202022362041 U CN202022362041 U CN 202022362041U CN 214273947 U CN214273947 U CN 214273947U
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Abstract
The utility model discloses a vacuum pump structure belongs to vacuum pump technical field. It comprises a bracket, an oil tank and a motor; one end of the bracket is fixed with the oil tank in a sealing way, the other end of the bracket is fixed with the motor in a sealing way, and the upper cover is provided with an air inlet stop valve with a filter screen; a pump body end cover, a low-stage stator inner end cover, a low-stage stator and a high-stage stator which are connected in sequence are arranged in the oil tank; a low-stage rotor is arranged in the low-stage stator, and a high-stage rotor is arranged in the high-stage stator; one end of the low-level rotor is movably connected with the inner end cover of the low-level stator and the pump body end cover, the other end of the low-level rotor is connected with the end part of the high-level rotor through a coupling between the rotors, the other end of the high-level rotor is connected with a rotating shaft of the motor through a pump end coupling, and a dynamic sealing structure is arranged between the high-level rotor and the support. The motor is adopted to drive the high-grade rotor and the low-grade rotor to rotate simultaneously, and two-stage relay vacuum pumping is utilized, so that higher vacuum pumping speed and higher limit pressure can be achieved.
Description
Technical Field
The utility model relates to a vacuum pump structure belongs to vacuum pump technical field.
Background
A vacuum pump is an air-extracting apparatus for evacuating a vacuum container. With the development of vacuum applications, the variety of vacuum pumps has been developed in many ways, with pumping speeds ranging from a few tenths of liters per second to hundreds of thousands, millions of liters per second. Common vacuum pumps include dry screw vacuum pumps, water ring pumps, reciprocating pumps, slide valve pumps, rotary vane pumps, roots pumps, diffusion pumps, and the like. The rotary vane pump mainly comprises a stator, a rotor, a rotary vane, a fixed cover, a spring and other parts. The structure is that the rotor is eccentrically arranged in the stator cavity (the clearance between the excircle of the rotor and the inner surface of the stator is tangent is very small) and the two rotary sheets which slide in the rotor groove and cling to the inner wall of the stator by the spring tension and the centrifugal force are utilized, and when the rotor rotates, the rotary sheets always slide along the inner wall of the stator. Typically, the gap between the vane and the pump chamber is sealed with oil, so vane vacuum pumps are typically oil-sealed mechanical vacuum pumps.
According to a wet vane rotary electric vacuum pump for an automobile (application number CN200910154501.4), the vacuum pump is driven by a motor. The vacuum pumping process is completed by using a single rotor, and on one hand, the vacuum pumping speed is low, and on the other hand, the vacuum pumping limiting pressure is low. Therefore, the vacuum pump structure is designed, and the vacuum pump structure utilizes the relay of the multi-stage rotor and can have better vacuumizing performance.
Disclosure of Invention
The utility model discloses the technical problem that will solve lies in: the utility model provides a vacuum pump structure, it has solved the problem that present vacuum pump pumping speed and ultimate pressure need further improvement.
The utility model discloses the technical problem that will solve takes following technical scheme to realize:
a vacuum pump structure comprises a bracket, an oil tank and a motor;
one end of the bracket is fixed with the oil tank in a sealing way, the other end of the bracket is fixed with the motor in a sealing way, the periphery of the bracket is sealed by the base, the two side covers and the upper cover, and the upper cover is provided with an air inlet stop valve with a filter screen;
a pump body end cover, a low-stage stator inner end cover, a low-stage stator and a high-stage stator which are connected in sequence are arranged in the oil tank, wherein the pump body end cover is fixed at the end part of the oil tank, and the high-stage stator is fixed at the end part of the bracket in a sealing manner;
a low-stage rotor is arranged in the low-stage stator, both sides of the low-stage rotor are respectively provided with a low-stage rotor vane pressed on the inner wall of the low-stage stator through a spring, a high-stage rotor is arranged in the high-stage stator, and both sides of the high-stage rotor are respectively provided with a high-stage rotor vane pressed on the inner wall of the high-stage stator through a spring;
one end of the low-stage rotor is movably connected with an inner end cover of the low-stage stator and an end cover of the pump body, the other end of the low-stage rotor is connected with the end part of the high-stage rotor through a coupling between rotors, the other end of the high-stage rotor is connected with a rotating shaft of the motor through a coupling at the pump end, and a dynamic sealing structure is arranged between the high-stage rotor and the bracket;
the air inlet stop valve is communicated with the inside air cavity of the high-grade stator through the support inner channel and the exhaust valve, the exhaust port of the high-grade stator is communicated with the inside air cavity of the low-grade stator, the top of the inside air cavity of the low-grade stator is provided with an exhaust port, the exhaust port is connected with an exhaust port joint arranged at the top of the oil tank through an exhaust port cover, and a baffle spring piece is arranged above the exhaust.
As a preferred example, the end part of the oil tank is hermetically fixed with a glass gland.
As a preferable example, the bottom of the oil tank is provided with an oil outlet with a plug.
As a preferred example, the top of the oil tank is provided with a lubricating oil hole with a hole cover.
As a preferred example, a lifting lug is fixed at the top of the bracket.
As a preferable example, the dynamic sealing structure comprises a step sealing groove hole arranged in the middle of the bracket and used for accommodating the high-grade rotor rotating shaft, a sealing element and a gland, wherein the sealing element is filled between the step sealing groove hole and the high-grade rotor rotating shaft, and the sealing element is pressed and fixed through the gland.
As a preferable example, the outer wall of the oil tank is provided with a plurality of convex ribs.
As a preferred example, the maximum volume of the air chamber sandwiched between the high-stage rotor vanes is larger than the maximum volume of the air chamber sandwiched between the low-stage rotor vanes.
The utility model has the advantages that: the motor is adopted to drive the high-level rotor and the low-level rotor to rotate simultaneously, and two-stage relay vacuum pumping is utilized, so that higher vacuum pumping speed and higher limit pressure can be achieved; the periphery of the bracket is sealed by the base, the two side covers and the upper cover, so that the bracket can be conveniently disassembled, maintained and repaired; the end part of the oil tank is hermetically fixed with a glass gland, so that the internal oil quantity can be conveniently observed; the oil tank outer wall is equipped with the protruding muscle of multichannel, not only can improve oil tank intensity, can also improve the oil tank radiating effect.
Drawings
FIG. 1 is a schematic view of a bracket connected to a motor;
FIG. 2 is a schematic view of the interior of the fuel tank;
fig. 3 is a schematic view of the overall structure of the bracket, the oil tank and the motor after assembly.
In the figure: the structure comprises a bracket 1, a base 101, two side covers 102, an upper cover 103, a filter screen 104, an air inlet stop valve 105, an exhaust valve 106, a lifting lug 107, a step seal slot hole 108, a sealing element 109, a gland 110, an oil tank 2, a pump body end cover 201, a low-level stator inner end cover 202, a low-level stator 203, a high-level stator 204, a low-level rotor 205, a low-level rotor rotary vane 206, a high-level rotor 207, a high-level rotor rotary vane 208, an inter-rotor coupling 209, a pump end coupling 210, an exhaust port 211, an exhaust port cover 212, an exhaust port connector 213, a baffle spring leaf 214, a glass gland 215, a plug 216, an oil filling hole 217, a convex rib 218, a sealing gasket 219, an exhaust port pressing plate 220 and a motor 3.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.
As shown in fig. 1-3, a vacuum pump structure comprises a bracket 1, an oil tank 2 and a motor 3;
one end of a bracket 1 is hermetically fixed with an oil tank 2 through a sealing gasket 219, the other end of the bracket 1 is hermetically fixed with a motor 3, the periphery of the bracket 1 is sealed through a base 101, two side covers 102 and an upper cover 103, and the upper cover 103 is provided with an air inlet stop valve 105 with a filter screen 104;
a pump body end cover 201, a low-stage stator inner end cover 202, a low-stage stator 203 and a high-stage stator 204 which are connected in sequence are arranged in the oil tank 2, wherein the pump body end cover 201 is fixed at the end part of the oil tank 2, and the high-stage stator 204 is fixed at the end part of the bracket 1 in a sealing manner;
a low-stage rotor 205 is arranged in the low-stage stator 203, low-stage rotor vanes 206 pressed on the inner wall of the low-stage stator 203 through springs are respectively arranged at two sides of the low-stage rotor 205, a high-stage rotor 207 is arranged in the high-stage stator 204, and high-stage rotor vanes 208 pressed on the inner wall of the high-stage stator 204 through springs are respectively arranged at two sides of the high-stage rotor 207;
one end of a low-stage rotor 205 is movably connected with a low-stage stator inner end cover 202 and a pump body end cover 201, the other end of the low-stage rotor 205 is connected with the end of a high-stage rotor 207 through an inter-rotor coupling 209, the other end of the high-stage rotor 207 is connected with a rotating shaft of a motor 3 through a pump end coupling 210, and a dynamic sealing structure is arranged between the high-stage rotor 207 and a support 1;
air inlet stop valve 105 passes through support 1 internal passage (sheltered from in the figure), discharge valve 106 and the inside air cavity intercommunication of senior stator 204, the gas vent of senior stator 204 and the inside air cavity intercommunication of low-grade stator 203, the inside air cavity top of low-grade stator 203 is equipped with gas vent 211, gas vent 211 passes through discharge cover 212 and is connected with the gas vent joint 213 of establishing at oil tank 2 top, gas vent 211 top is equipped with baffle spring leaf 214, inside being equipped with of discharge cover 212 with gas vent 211 sealing connection's gas vent clamp plate 220.
A glass gland 215 is hermetically fixed at the end of the oil tank 2. The bottom of the oil tank 2 is provided with an oil discharge port with a plug 216. The top of the oil tank 2 is provided with an oil filling hole 217 with a hole cover. A lifting lug 107 is fixed on the top of the bracket 1.
The dynamic sealing structure comprises a stepped sealing groove hole 108 arranged in the middle of the bracket 1 and used for accommodating the rotating shaft of the high-stage rotor 207, a sealing element 109 and a gland 110, wherein the sealing element 109 is filled between the stepped sealing groove hole 108 and the rotating shaft of the high-stage rotor 207, and the sealing element 109 is pressed and fixed through the gland 110. The sealing element 109 is a sealing gasket or packing. The outer wall of the oil tank 2 is provided with a plurality of convex ribs 218.
Wherein the maximum volume of the air chamber sandwiched between the high-stage rotor vanes 208 (at the beginning of compression) is greater than the maximum volume of the air chamber sandwiched between the low-stage rotor vanes 206 (at the beginning of compression). For example, the cross-sectional area of the air chamber clamped between the high-stage rotor vanes 208 is shortened to 1/3 in the axial direction, and the volume of the air chamber clamped between the high-stage rotor vanes 208 is 3 times that of the air chamber clamped between the low-stage rotor vanes 206, so that the pressure can be increased step by step, and the effect of increasing the limiting pressure is achieved.
The working principle is as follows: the motor 3 rotates to drive the high-stage rotor 207 and the low-stage rotor 205 to rotate; the air cavity clamped between the high-grade rotor rotary vanes 208 on the two sides of the eccentric high-grade rotor 207 is gradually reduced, the air is compressed and discharged to achieve the effects of exhausting and vacuumizing, and the external air enters the air cavity inside the high-grade stator 204 through the air inlet stop valve 105, the internal channel of the bracket 1 and the exhaust valve 106 in sequence after negative pressure is formed; the air outlet of the high-stage stator 204 is communicated with the air cavity in the low-stage stator 203, the air cavity clamped by the low-stage rotor rotary vanes 206 on two sides of the eccentric low-stage rotor 205 is gradually reduced, the air is compressed for the second stage, and the air is discharged from the air outlet joint 213 on the top of the oil tank 2.
It includes the following advantages: the motor 3 is adopted to drive the high-level rotor 207 and the low-level rotor 205 to rotate simultaneously, and two-level relay vacuum pumping (different two-level compression ratios, relay vacuum pumping effect is generated) is utilized, so that higher vacuum pumping speed and limit pressure can be achieved; the periphery of the bracket 1 is sealed by the base 101, the two side covers 102 and the upper cover 103, so that the disassembly, maintenance and repair can be conveniently carried out; the end part of the oil tank 2 is hermetically fixed with a glass gland 215, so that the internal oil quantity can be conveniently observed; the outer wall of the oil tank 2 is provided with a plurality of convex ribs 218, so that the strength of the oil tank 2 can be improved, and the heat dissipation effect of the oil tank 2 can also be improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A vacuum pump structure is characterized by comprising a bracket, an oil tank and a motor;
one end of the bracket is fixed with the oil tank in a sealing way, the other end of the bracket is fixed with the motor in a sealing way, the periphery of the bracket is sealed by the base, the two side covers and the upper cover, and the upper cover is provided with an air inlet stop valve with a filter screen;
a pump body end cover, a low-stage stator inner end cover, a low-stage stator and a high-stage stator which are connected in sequence are arranged in the oil tank, wherein the pump body end cover is fixed at the end part of the oil tank, and the high-stage stator is fixed at the end part of the bracket in a sealing manner;
a low-stage rotor is arranged in the low-stage stator, both sides of the low-stage rotor are respectively provided with a low-stage rotor vane pressed on the inner wall of the low-stage stator through a spring, a high-stage rotor is arranged in the high-stage stator, and both sides of the high-stage rotor are respectively provided with a high-stage rotor vane pressed on the inner wall of the high-stage stator through a spring;
one end of the low-stage rotor is movably connected with an inner end cover of the low-stage stator and an end cover of the pump body, the other end of the low-stage rotor is connected with the end part of the high-stage rotor through a coupling between rotors, the other end of the high-stage rotor is connected with a rotating shaft of the motor through a coupling at the pump end, and a dynamic sealing structure is arranged between the high-stage rotor and the bracket;
the air inlet stop valve is communicated with the inside air cavity of the high-grade stator through the support inner channel and the exhaust valve, the exhaust port of the high-grade stator is communicated with the inside air cavity of the low-grade stator, the top of the inside air cavity of the low-grade stator is provided with an exhaust port, the exhaust port is connected with an exhaust port joint arranged at the top of the oil tank through an exhaust port cover, and a baffle spring piece is arranged above the exhaust port.
2. A vacuum pump structure according to claim 1, wherein a glass gland is sealingly fixed to an end of the oil tank.
3. A vacuum pump structure according to claim 1, wherein the bottom of the oil tank is provided with an oil outlet with a plug.
4. A vacuum pump structure according to claim 1, wherein a filler hole with a hole cover is provided at a top of the oil tank.
5. A vacuum pump structure according to claim 1, wherein a lifting lug is fixed to the top of the bracket.
6. A vacuum pump structure according to claim 1, wherein the dynamic sealing structure comprises a stepped sealing groove hole arranged in the middle of the bracket for accommodating the high-grade rotor rotating shaft, a sealing element and a gland, the sealing element is filled between the stepped sealing groove hole and the high-grade rotor rotating shaft, and the sealing element is tightly pressed and fixed by the gland.
7. A vacuum pump structure according to claim 1, wherein the outer wall of the oil tank is provided with a plurality of ribs.
8. A vacuum pump construction according to claim 1, wherein the maximum volume of the air chamber sandwiched between the high-stage rotor vanes is greater than the maximum volume of the air chamber sandwiched between the low-stage rotor vanes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022362041.9U CN214273947U (en) | 2020-10-21 | 2020-10-21 | Vacuum pump structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022362041.9U CN214273947U (en) | 2020-10-21 | 2020-10-21 | Vacuum pump structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214273947U true CN214273947U (en) | 2021-09-24 |
Family
ID=77772590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022362041.9U Active CN214273947U (en) | 2020-10-21 | 2020-10-21 | Vacuum pump structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214273947U (en) |
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2020
- 2020-10-21 CN CN202022362041.9U patent/CN214273947U/en active Active
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