CN219499141U - Integrated shaft type sealed vacuum pump motor - Google Patents

Abstract

The utility model relates to an integrated shaft type sealed vacuum pump motor, comprising: a water jacket, a shell, a stator, a rotor, a first sealing ring, a pressure ring, a vacuum pump, an integrated shaft, sealant, a second sealing ring, and a sealing terminal assembly . The motor shaft of the utility model is integrated with the shaft of the pump body, which fully ensures the coaxiality of the motor and the pump body, and can effectively avoid abnormalities and wear of the motor caused by process objects through sealing. And effectively overcome the defects of poor sealing performance of the sealant, short service life, and easy leakage of the water inlet and outlet of the water jacket and the external waterway interface. Through the step part and the sealing ring, the sealing performance is not affected by the flatness and assembly of the installation surface of the housing mouth, ensuring the sealing performance, and overcoming the problem of easy leakage at the seam caused by connecting the terminal and the housing by welding. defect.

Description

Integrated Shaft Sealed Vacuum Pump Motor

technical field

The utility model relates to the technical field of vacuum pumps, in particular to an integrated shaft-type sealed vacuum pump motor.

Background technique

The purpose of the vacuum pump is to extract gas molecules from the vacuum chamber, reduce the gas pressure in the vacuum chamber, and make it reach the required vacuum degree. It is mainly used in pharmaceutical and chemical industry, vacuum coating, vacuum drying, surface treatment, vacuum smelting, ceramic manufacturing, food packaging, milking, beverage and other industries.

The two axes of the rotor of the vacuum pump are parallel to each other. The rotor is composed of the impeller and the shaft. There is a small gap between the impellers, between the impeller and the casing and the wall plate to avoid mutual contact. The two rotors are driven by a motor through a pair of synchronous gears, and rotate at a constant speed in opposite directions. With the help of the mutual meshing of the two impellers, the pump inlet and exhaust ports are not connected directly. The impeller, the casing and the wall panels form a closed elementary volume. With the continuous rotation of the impeller, the elementary volume is always in the suction-compression state. -Transportation-exhaust cycle state, continuously discharge the air and dust in the chamber to the outside of the pump to meet the process requirements.

The prior art is a split-shaft motor with a relatively complex structure, and it is difficult to ensure the coaxiality of the motor and the pump body, and the torque will be lost during the transmission process, and the efficiency is low. For the purpose of cooling the vacuum pump motor, some existing technologies use casting to integrate the water channel into the shell wall, but the casting tooling is difficult to process and difficult to take out, and some will set a water jacket on the vacuum pump motor shell, but The water jacket and the shell need to be sealed with sealant, which has poor sealing performance and short service life, and the water inlet and outlet of the water jacket and the external waterway interface are prone to leakage.

The motor stator in the prior art is not sealed, and the air and dust in the vacuum pump are easy to enter the motor stator, which will cause accidental wear and insulation damage of the stator, thereby wearing the rotor and increasing the shaft current.

In the prior art, in order to realize the size conversion of the seam of the housing and seal the seam of the housing, it is necessary to install a sealing ring on the seam of the housing. In addition, terminals need to be set on the shell for the lead out of the line. However, the sealing ring is added to the housing seam installation surface, which is easily affected by the flatness and assembly of the housing seam installation surface, resulting in that the sealing performance cannot be guaranteed. If the terminal post is connected to the housing by welding, it is easy to leak at the seam.

Therefore, how to overcome the shortcomings of the above-mentioned prior art solutions has become an urgent problem to be solved in the technical field.

Utility model content

In order to overcome the shortcomings of the above-mentioned prior art, the utility model provides an integrated shaft vacuum pump motor stator and rotor assembly. The utility model specifically adopts the following technical solutions.

An integrated shaft-type sealed vacuum pump motor, which includes: a water jacket, a housing, a stator, a rotor, a first sealing ring, a pressure ring, a vacuum pump, an integrated shaft, sealant, a second sealing ring, and a sealing terminal assembly;

The integrated shaft serves as the motor shaft of the integrated shaft sealed vacuum pump motor and the pump body shaft of the vacuum pump at the same time;

The stator is fixed inside the housing by means of interference fit;

The outer surface of the housing is provided with a grooved cooling channel for circulating cooling liquid to cool down the vacuum pump motor;

The outer surface of the housing is respectively provided with a sealing ring installation groove near both ends, and the first sealing ring is arranged in the sealing ring installation groove;

The water jacket is sleeved on the outer surface of the housing, and the first sealing ring is used to seal the gap between the water jacket and the housing;

The sealant is poured and arranged between the stator and the housing to seal the stator.

Further, the material of the water jacket is an aluminum alloy material, which is treated with an anti-rust surface; the water jacket is provided with a water inlet and a water outlet for communicating with the cooling liquid, and the inner walls of the water inlet and water outlet are provided with tapered threads, Used for fixed connection with joints of external waterways.

Further, the end face of the housing spigot is provided with a step portion for setting the pressure ring; a sealing groove is provided on the lower step surface of the step portion, and a second sealing ring is arranged in the sealing groove; the The pressure ring is fixed in the stepped portion by means of interference fit, and the second sealing ring is arranged between the pressure ring and the housing to seal the gap between the pressure ring and the housing.

Further, the material of the pressure ring is stainless steel, and the pressure ring is used to realize the conversion of the mouth size of the housing.

Further, the housing is provided with a wiring opening for passing through the lead wire;

The sealed terminal assembly includes a flat flange and several hollow terminal posts perpendicular to the flat flange; the flat flange is installed on the wiring opening and covers the wiring opening, and the flat flange A silicone pad is provided between the shell and the shell and sealed with glue; several screw holes are set on the edge of the flat flange, and the screws pass through the screw holes to fix the sealing terminal assembly on the shell; connected or welded within said terminal of the sealed terminal assembly.

Furthermore, the material of the sealant is epoxy resin AB glue, which can withstand high and low temperature impact ranges such that the high temperature is not lower than 150°C and the low temperature is not higher than -40°C.

Further, a glue-filling mandrel is inserted into the interior of the stator to perform the glue-filling operation; the material of the glue-filling mandrel is a polytetrafluoroethylene material that shrinks and expands greatly under the influence of temperature.

Further, the bottom of the glue filling mandrel is provided with a first threaded hole, and the bottom of the housing is provided with a second threaded hole. After the glue filling mandrel is inserted into the inside of the stator, bolts are used to pass through the first threaded hole. The hole is screwed to the second threaded hole, so that the glue filling mandrel is fixed inside the housing;

The top of the glue filling mandrel is provided with a plurality of third threaded holes, and the top of the housing is provided with fourth threaded holes having the same number as the third threaded holes, and the glue filling mandrel is inserted into the inside of the stator , use a bolt to pass through the third threaded hole and be screwed to the fourth threaded hole.

Further, glue filling holes are set on the housing, and the glue filling machine is used for automatic glue filling through the glue filling holes.

Further, the glue filling mandrel is heated together with the parts of the integrated shaft vacuum pump motor before glue filling, and the glue filling mandrel and the parts of the integrated shaft vacuum pump motor are cooled together after glue filling deal with.

The utility model adopts an integrated shaft motor, the motor shaft and the pump body shaft are integrated, which fully guarantees the coaxiality of the motor and the pump body, the torque will not be lost in the transmission process, and the efficiency is higher. parts, lower costs and higher reliability. The shell and the water jacket are processed separately, and then the shell and the water jacket are welded together to form a water channel and its seal. The utility model also effectively avoids motor abnormalities and abrasion phenomena caused by process objects by performing sealing protection on the motor stator. The replaceable sealing ring replaces the sealant, which effectively overcomes the defects of poor sealing performance and short service life of the sealant; the taper thread effectively overcomes the defect that the water inlet and outlet of the water jacket and the external waterway interface are prone to leakage; Through the step part and the sealing ring, the sealing performance is not affected by the flatness and assembly of the installation surface of the housing mouth, and the sealing performance is guaranteed; the terminal is connected with the housing through the sealing terminal assembly, which overcomes the need for welding to connect with the housing The defect that the connection is prone to leakage at the seam.

Description of drawings

Fig. 1 is a schematic diagram of the motor structure of the integrated shaft type sealed vacuum pump of the present invention.

Figure 2 is a schematic diagram of the sealing terminal assembly of the integrated shaft type sealed vacuum pump motor of the present invention

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described. The following examples are only used to illustrate the technical solution of the utility model more clearly, but not to limit the protection scope of the utility model. It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application.

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 application belongs. It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

Referring to the accompanying drawing 1, the specific embodiment 1 of the present utility model relates to an integrated shaft-type sealed vacuum pump motor, including: a water jacket 1, a casing 2, a stator 3, a rotor 4, a first sealing ring 5, and a pressure ring 6 , a vacuum pump 7, an integral shaft 8, a sealant 9, a second sealing ring 10, and a sealing terminal assembly 11.

The specific installation method of the integrated shaft-type sealed vacuum pump motor is to put the first sealing ring 5 into the sealing ring installation groove of the casing 2, then assemble the water jacket 1 to the casing 2, and then press the stator 3 into the casing Body 2, crimping or welding the lead wires to the sealing terminal assembly 11, adding a silicone pad and applying glue to seal, fixing the sealing terminal assembly 11 with screws, and then sealing with glue 9; putting the second sealing ring 10 into Seal the groove, and then press the pressure ring 6; assemble the rotor 4 on the integrated shaft 8 of the vacuum pump 7 first, and then install it inside the stator 3; finally assemble the motor as a whole with the vacuum pump 7, and fix it with screws.

Wherein, the integral shaft 8 serves as the motor shaft of the integral shaft-type sealed vacuum pump motor and the pump body shaft of the vacuum pump 7 at the same time; the stator 3 is fixed inside the housing 2 by means of interference fit.

The outer surface of the housing 2 is provided with a groove-like cooling channel for circulating cooling fluid to cool down the vacuum pump motor.

A sealing ring installation groove is respectively provided on the outer surface of the housing 2 close to both ends, and a first sealing ring 5 is arranged in the sealing ring installation groove. The water jacket 1 is sleeved on the outer surface of the housing 2 , and the first sealing ring 5 is used to seal the gap between the water jacket 1 and the housing 2 .

The material of the water jacket 1 is aluminum alloy material, and the surface treatment of the water jacket 1 is anti-rust.

The utility model replaces the sealant in the prior art by the replaceable first sealing ring 5 to seal the gap between the water jacket 1 and the shell 2, effectively overcoming the poor sealing performance and short service life of the sealant Defects.

The water jacket 1 is provided with a water inlet and a water outlet for communicating with cooling liquid, and the inner walls of the water inlet and water outlet are provided with taper threads for fixed connection with the joint of the external waterway.

The utility model effectively overcomes the defect that the water jacket water inlet, the water outlet and the external waterway interface are prone to leakage through the taper thread.

The end face of the seam of the housing 2 is provided with a stepped portion for setting the pressure ring 6 . A sealing groove is arranged on the lower step surface of the step portion, and a second sealing ring 10 is arranged in the sealing groove.

The pressure ring 6 is fixed in the stepped portion by means of interference fit, and the second sealing ring 10 is arranged between the pressure ring 6 and the housing 2 to oppose the pressure ring 6 and the housing 2 The gap between them is sealed.

The material of the pressure ring 6 is stainless steel, and the pressure ring 6 is used to realize the conversion of the notch size of the housing 2 .

In the utility model, the sealing performance is not affected by the flatness and assembly of the spigot installation surface of the shell through the step part and the sealing ring, so as to ensure the sealing performance.

The casing 2 is provided with a wiring opening for passing through the lead wires. The sealing terminal assembly 11 includes a flat flange and several hollow terminal posts perpendicular to the flat flange, as shown in FIG. 2 , the number of terminal posts in this embodiment is three.

The flat flange is installed on the wiring opening and covers the wiring opening, and a silicone pad is arranged between the flat flange and the housing 2 and sealed with glue.

A number of screw holes are provided on the edge of the flat flange, as shown in Figure 2, the number of screw holes in this embodiment is four. Screws pass through the screw holes to fix the sealing terminal assembly 11 on the housing 2 . The lead wires are crimped or welded in the terminals of the sealed terminal assembly 11 .

The terminal post of the utility model is connected with the casing through the sealing terminal assembly, which overcomes the defect that the connection with the casing by welding is easy to leak at the seam.

When the integrated axial vacuum pump motor seal housing assembly of the utility model is installed, the water jacket 1 and the housing 2 are pressed together through the gap to form a cooling water channel, and the circulating cooling liquid cools the vacuum pump motor, and the two ends of the water jacket 1 pass through The first sealing ring 5 is water-sealed, and the water pressure resistance is not less than 10kg, so as to prevent the coolant from leaking. The water jacket is made of aluminum alloy, and the surface is treated to prevent corrosion. The second sealing ring 10 is put into the seal groove of the shell 2, and then pressed into the pressure ring 6. The two are interference fit to realize the conversion of the seal size. At the same time, it is air-tight, and can withstand the pressure of 0.1MPa without leakage. Pressing ring 6 adopts stainless steel material, guarantees the colleague of intensity and prevents corrosion. The lead wires are crimped or welded in the terminal of the sealed terminal assembly 11, a silicone pad is added between the sealed terminal assembly 11 and the wiring opening of the housing 2 and sealed with glue, and finally the screw is passed through the terminal of the sealed terminal assembly 11. The mounting hole fixes it in the wiring opening of the casing 2 to realize airtightness and can withstand a pressure of 0.1 MPa without leakage.

The sealant 9 is poured and arranged between the stator 3 and the housing 2 to seal the stator 3 .

The stator 3 is used to cooperate with the rotor 4 to realize electromechanical energy conversion. The material of the sealant 9 is epoxy resin AB glue, which has good insulation, thermal conductivity, fluidity, air tightness, high hardness and can withstand high and low temperature impact (high temperature is not lower than 150°C, The low temperature is not higher than -40°C).

In order to prevent the glue from flowing into the inner hole of the stator 3 during the glue filling process, thereby affecting the rotation of the motor rotor 4, the utility model also includes a glue filling mandrel.

During glue filling, the glue filling mandrel is inserted into the inside of the stator 3. The glue filling mandrel must be easy to put in and take out, and it needs to be tightened during glue filling so that there is no gap between it and the stator 3. Therefore, the material of the glue-filling mandrel needs to use a material that has a large amount of shrinkage and expansion due to temperature, such as polytetrafluoroethylene.

The bottom of the glue filling mandrel is provided with a first threaded hole, and the bottom of the housing 2 is provided with a second threaded hole. After the glue filling mandrel is inserted into the inside of the stator 3, bolts are used to pass through the first threaded hole. The hole is screwed to the second threaded hole, so that the glue filling mandrel is fixed inside the housing 2 .

The fixed portion of the glue filling mandrel is provided with a plurality of third threaded holes, and the top of the housing 2 is provided with fourth threaded holes having the same number as the third threaded holes, and the glue filling mandrel is inserted into the stator 3, use bolts to pass through the third threaded hole and screw to the fourth threaded hole.

The shell 2 is provided with a glue filling hole, and the glue filling machine is used for automatic glue filling through the glue filling hole.

The specific process of glue filling is as follows:

(1) Take out the glue filling mandrel after refrigerating for 1 hour, apply the release agent and insert it into the stator 3, the bottom and top of the glue filling mandrel, and the bottom and top of the shell 3 are provided with threaded holes, and use Bolts fix the glue filling mandrel on the housing 2 to prevent glue flow at the joint between the bottom of the tooling and the motor housing.

(2) Put the integrated shaft-type sealed vacuum pump motor into the oven to heat and keep warm.

(3) The glue filling machine adds the sealant 9, and confirms the ratio of AB glue.

(4) After the heat preservation is completed, take out the integrated shaft-type sealed vacuum pump motor and place it on the glue filling table, check whether the inside of the stator 3 is tight, and start glue filling after confirming the tightness. The shell 2 is equipped with a filling Glue hole, the mixed glue flows into the motor from the glue hole, the glue fills the motor coil, and the covering thickness is not less than 5mm.

(5) After the glue filling is completed, put the integrated shaft-type sealed vacuum pump motor into the oven for heating.

(6) Turn off the oven after heating, and the motor will cool down with the oven.

(7) Take out the motor to cool naturally, and then put it in the refrigerator to cool down.

(8) Take out the glue-filling mandrel, remove the remaining glue, and clean it to ensure that there is no residual foreign matter inside or outside the stator 3 of the integrated shaft-type sealed vacuum pump motor.

The utility model can obtain the following technical effects: 1. An integrated shaft motor is adopted, the motor shaft and the pump body shaft are integrated, the structure is simple, the parts are saved, the cost is reduced, the coaxiality is easier to ensure, the efficiency is higher, and the reliability is higher. 2. The pressure ring at the mouth of the shell is sealed with a sealing ring between the pressure ring and the mouth of the shell. The lead wire is crimped or welded to the sealing terminal assembly, which is sealed by the sealing terminal assembly and a silicone pad. Glue is applied between the shell and the processing and assembly precision, which saves costs, and has better sealing performance and longer sealing life. 3. The installation surface of the sealing terminal assembly adopts a groove design, and the sealing terminal assembly is sunk under the installation surface. During the screw locking process, the silicone pad and glue are squeezed and filled in the groove to improve the sealing performance. 4. The motor housing of the vacuum pump is decomposed into two parts, the housing and the water jacket. The water jacket and the housing are sealed by an end sealing ring. The water inlet and outlet adopt taper threads, which are simple to process, low in cost, and convenient Airtight and better sealing performance. 5. After the stator assembly is completed, continue to process the motor seam and the inner circle of the stator to ensure the coaxiality; the rotor can be assembled on the vacuum pump because the rotating shaft is an integral shaft, and then the outer circle of the rotor and the seam of the pump body are guaranteed. The final assembly is completed after coaxiality, which reduces the assembly accuracy requirements of the motor and improves the product qualification rate. 6. The stator is filled with glue, which not only improves the insulation effect, prevents sundries from entering the stator, but also improves the sealing performance.

The above is only a preferred embodiment of the present utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, some improvements and deformations can also be made. And deformation should also be regarded as the protection scope of the present utility model.

Claims (10)

1. An integral shaft type sealed vacuum pump motor, characterized in that, the integral shaft type sealed vacuum pump motor includes: the device comprises a water jacket (1), a shell (2), a stator (3), a rotor (4), a first sealing ring (5), a compression ring (6), a vacuum pump (7), an integrated shaft (8), sealing glue (9), a second sealing ring (10) and a sealing binding post assembly (11);

the integral shaft (8) is used as a motor shaft of an integral shaft type sealed vacuum pump motor and a pump body shaft of the vacuum pump (7) at the same time;

the stator (3) is fixed in the shell (2) in an interference fit manner;

the outer surface of the shell (2) is provided with a groove-shaped cooling water channel for circulating cooling liquid to cool down the vacuum pump motor;

the outer surface of the shell (2) is provided with a sealing ring mounting groove close to two ends respectively, and the first sealing ring (5) is arranged in the sealing ring mounting groove;

the water jacket (1) is sleeved on the outer surface of the shell (2), and the first sealing ring (5) is used for sealing a gap between the water jacket (1) and the shell (2);

the sealant (9) is poured between the stator (3) and the shell (2) to seal the stator (3).

2. The integral shaft type sealed vacuum pump motor according to claim 1, wherein the material of the water jacket (1) is an aluminum alloy material, which is subjected to rust-preventive surface treatment; the water jacket (1) is provided with a water inlet and a water outlet for communicating cooling liquid, and the inner walls of the water inlet and the water outlet are provided with conical threads for fixedly connecting with a joint of an external waterway.

3. The integral shaft type sealed vacuum pump motor according to claim 1, wherein an end face of the spigot of the housing (2) is provided with a step portion for providing the press ring (6); a sealing groove is formed in the lower step surface of the step part, and a second sealing ring (10) is arranged in the sealing groove; the clamping ring (6) is fixed in the step part in an interference fit mode, and the second sealing ring (10) is arranged between the clamping ring (6) and the shell (2) and seals a gap between the clamping ring (6) and the shell (2).

4. A sealed vacuum pump motor of the integral shaft type according to claim 3, characterized in that the material of the pressure ring (6) is stainless steel material, the pressure ring (6) is used for realizing the spigot size conversion of the shell (2).

5. The integrated shaft type sealed vacuum pump motor according to claim 1, wherein the housing (2) is provided with a wiring opening for passing through a lead;

the sealing binding post assembly (11) comprises a flat flange and a plurality of hollow binding posts perpendicular to the flat flange; the flat flange is arranged on the wiring opening and covers the wiring opening, and a silica gel pad is arranged between the flat flange and the shell (2) and is glued and sealed; the edge of the flat flange is provided with a plurality of screw holes, and screws penetrate through the screw holes to fix the sealing terminal assembly (11) on the shell (2); the lead wire is crimped or welded into the terminal of the hermetic terminal assembly (11).

6. The integrated shaft type sealed vacuum pump motor according to claim 1, wherein the material of the sealing glue (9) is epoxy resin AB glue, and the high-low temperature impact bearing range is not lower than 150 ℃ and not higher than-40 ℃.

7. The integrated shaft type sealed vacuum pump motor according to claim 1, wherein a glue filling mandrel is inserted into the stator (3) for glue filling operation; the material of the glue filling mandrel is polytetrafluoroethylene material with large shrinkage and expansion quantity under the influence of temperature.

8. The integrated shaft type sealed vacuum pump motor according to claim 7, wherein a first threaded hole is formed in the bottom of the glue filling mandrel, a second threaded hole is formed in the bottom of the shell (2), and after the glue filling mandrel is inserted into the stator (3), the glue filling mandrel is screwed into the second threaded hole through the first threaded hole by using a bolt, so that the glue filling mandrel is fixed in the shell (2);

the top of the glue filling mandrel is provided with a plurality of third threaded holes, the top of the shell (2) is provided with fourth threaded holes with the same number as the third threaded holes, and after the glue filling mandrel is inserted into the stator (3), bolts penetrate through the third threaded holes and are in threaded connection with the fourth threaded holes.

9. The integrated shaft type sealed vacuum pump motor according to claim 8, wherein a glue filling hole is formed in the shell (2), and glue is automatically filled through the glue filling hole by a glue filling machine.

10. The integral shaft seal vacuum pump motor of claim 9 wherein said glue-filling mandrel is co-heat treated with components of said integral shaft vacuum pump motor prior to glue filling and is co-cool treated with components of said integral shaft vacuum pump motor after glue filling.