Cooling device for Roots water ring vacuum unit

Abstract

The present invention belongs to the field of vacuum unit equipment, and proposes a cooling device for a Roots water ring vacuum unit, including a motor, a main shaft, a motor main shell, a front cover, a rear cover, a rear shell, a junction box, a base, a pump body, a working impeller, a heat dissipation impeller and a louver grille, wherein the rear shell is provided with a plurality of axial pipe columns near its edge, and a ceramic heat dissipation column core is provided in the pipe hole, and the motor main shell includes a shell, fixed heat dissipation fins, heat dissipation strip holes and a shell heat dissipation unit corresponding to the heat dissipation strip holes one by one, and the shell heat dissipation unit includes a pair of heat dissipation clamps distributed on both sides of the heat dissipation strip holes, and a porous ceramic plate core is provided between the heat dissipation clamps, and a partition is provided in the center of the porous ceramic plate core, and the partition is in a T-shaped structure and its top surface covers the top surface of the porous ceramic plate core. The present invention has reasonable design, simple structure, good heat dissipation performance, energy-saving advantages, and is conducive to ensuring the working performance of the unit, and is suitable for large-scale promotion.

Description

Technical Field

[0001] The invention belongs to the field of vacuum unit equipment, and in particular relates to a cooling device for a Roots water ring vacuum unit. Background Art

[0002] The water ring vacuum pump is a rough vacuum pump. The ultimate vacuum it can obtain is 2000-4000 Pa, and the atmospheric ejector in series can reach 270-670 Pa. The water ring pump can also be used as a compressor, called a water ring compressor, which is a low-pressure compressor. The water ring vacuum pump generally includes three steps of suction, compression and exhaust to achieve the purpose of exhaust. According to the number of compressions, it can be divided into single-stage pumps and multi-stage pumps. Since the motor part of the Roots water ring vacuum pump continuously works and generates a lot of heat, traditionally, the heat dissipation is promoted through the motor housing and the heat dissipation fins on the housing to ensure the real-time working performance of the motor.

[0003] The existing patent CN202223121066.5 discloses a Roots screw vacuum unit with a cooling device, which comprises a base, a top block is fixedly connected to the top of the base, a shell is arranged on the top of the base, a cooling assembly is arranged on one side of the shell, the cooling assembly comprises a connecting plate, a baffle shell and a cooling pipe, a connecting plate is arranged on one side of the shell, a baffle shell is fixedly connected to the inner wall of the shell, a cooling pipe is connected to one side of the connecting plate, and one end of the cooling pipe away from the connecting plate is connected to the baffle shell. Although such a vacuum unit can heat the motor, mainly the motor housing, its added multiple power structures such as water pumps increase the power consumption of the entire equipment, and there is a problem of not making up for the loss while increasing the cost to a certain extent; secondly, the cooling device is not conducive to the arrangement of the motor terminal box. If the spatial arrangement characteristics of the motor terminal box are fully considered, there is a certain distance between the cooling working surface and the motor, so its actual heat dissipation and cooling effect also need to be improved.

[0004] For another example, the existing patent CN214092200U discloses a vacuum pump with a metal cooling fan. Gas enters the pump body through the vacuum pump air inlet, and after the pump rotor rotates, the gas is compressed and discharged to the outside of the pump body through the exhaust port. The motor drives the rotor to rotate, and the cooling fan rotates accordingly. The heat generated at the rotor reaches the pump body, passes through the high-efficiency air outlet on the chassis of the cooling fan to reach between the fan blades, and is discharged from the vacuum pump with the air flow, thereby achieving the purpose of cooling. The vacuum pump achieves the purpose of heat dissipation through a cooling fan coaxially connected to the main shaft, but because its main working surface is located at the end of the motor, the heat dissipation effect on the motor housing is not good, and the motor housing still mainly relies on the heat exchange between its body surface and the air to achieve the purpose of heat dissipation. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned vacuum unit, the present invention proposes a cooling device for a Roots water ring vacuum unit which has a reasonable design, a simple structure, good heat dissipation performance, an energy-saving advantage and is beneficial to ensuring the working performance of the unit.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the cooling device for the Roots water ring vacuum unit provided by the present invention includes a motor, the motor includes a main shaft, a motor main shell, a front cover, a rear cover, a rear shell, a junction box and a base, a pump body is arranged at one end of the main shaft, a working impeller is arranged inside the pump body, a heat dissipation impeller is arranged at the other end of the main shaft between the rear cover and the rear shell, a louver grille is arranged on the end surface of the rear shell, a plurality of axial pipe columns are arranged near the edge of the rear shell, the pipe holes of the axial pipe columns are tangent to the shell wall of the rear shell, a ceramic heat dissipation column core is arranged in the pipe holes, the motor main shell includes a shell, and the The shell is provided with a plurality of fixed heat dissipation fins distributed at both ends of the junction box, and the shell is provided with a plurality of heat dissipation strip holes distributed at equal intervals except for the positions where the fixed heat dissipation fins are located. The shell is provided with a plurality of shell heat dissipation units corresponding to the heat dissipation strip holes one by one, and the shell heat dissipation units include a pair of heat dissipation clamps distributed on both sides of the heat dissipation strip holes, a porous ceramic plate core is provided between the heat dissipation clamps, one end of the porous ceramic plate core extends toward the center direction of the motor, and the other end of the porous ceramic plate core is pressed on the top of the heat dissipation clamp, and a partition member is provided in the center of the porous ceramic plate core, and the partition member is in a T-shaped structure and its top surface covers the top surface of the porous ceramic plate core.

[0007] Preferably, the bottom of the heat dissipation clamp is welded to the shell, and the two ends of the same pair of heat dissipation clamps are connected by countersunk bolts. The end face of the heat dissipation clamp is a trapezoidal structure and it is sealed and docked with another heat dissipation clamp. The opposite back faces of the same pair of heat dissipation clamps are both inclined and have an isosceles structure. The opposite faces of the same pair of heat dissipation clamps are provided with clamping openings corresponding to the heat dissipation strip holes, and the length of the clamping openings is less than the axial length of the heat dissipation clamp.

[0008] Preferably, the porous ceramic plate core has a T-shaped structure and a mounting groove for mounting a partition member is arranged at its center. Both sides of the porous ceramic plate core are provided with a plurality of positioning protrusions spaced apart along its length direction, and the positioning protrusions cooperate with the positioning grooves arranged on the inner wall of the clamping port.

[0009] Preferably, the top surface of the porous ceramic core is provided with a plurality of pairs of lower roller grooves symmetrically distributed about the mounting notches, the lower roller grooves are opposite to the upper roller grooves provided on the partition member, and support rollers are provided in the upper roller grooves and the lower roller grooves.

[0010] Preferably, the support roller is a conical structure, and the small bottom ends of the support rollers on both sides of the mounting slot are arranged opposite to each other.

[0011] Preferably, a plurality of positioning holes penetrating the mounting slots are provided on both sides of the porous ceramic core, and the positioning holes cooperate with spring positioning parts provided on both sides of the partition member, and the spring positioning parts are provided in countersunk holes opened on the sides of the partition member, and the spring positioning parts include a plurality of spring sheets arcing toward the positioning holes.

[0012] Preferably, a plurality of slide grooves are provided on both sides of the installation notch, the slide grooves correspond to the positioning holes and the tops of the slide grooves are open.

[0013] Preferably, stoppers are provided at both ends of the partition member, and ends of the stoppers are flush with ends of the heat dissipation clamping plate.

[0014] Preferably, the base comprises two pairs of base units symmetrically distributed about the main axis, a bridge plate is welded between the base units on the same side, and the base unit comprises a bottom plate, on which are two support plates obliquely connected to the shell at different angles.

[0015] Preferably, a portion of the axial column located on the inner side of the rear shell is provided with a guide groove, and an end of the ceramic heat dissipation column core is provided with a ceramic groove matching the guide groove.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] 1. The cooling device for the Roots water ring vacuum unit provided by the present invention realizes heat dissipation of the tail of the motor by continuous rotation of the heat dissipation impeller coaxially connected to the main shaft, accelerates the heat dissipation of the rear shell material by a ceramic heat dissipation column core, and dissipates the heat of the motor main shell and its internal rotor and stator working cavity by a shell heat dissipation unit, thereby effectively improving the heat dissipation and cooling performance of the Roots water ring vacuum unit during operation.

[0018] 2. The cooling device for the Roots water ring vacuum unit provided by the present invention has a design of multiple pairs of heat dissipation clamps, which not only increases the actual heat dissipation area of ​​the motor main shell, but also provides an assembly space for the porous ceramic plate core, so that the porous ceramic plate core can promote the heat dissipation of the motor. In addition to having a good heat dissipation effect, the porous ceramic plate core also has adsorption and filtration, insulation and other properties, and the spatial arrangement of all shell heat dissipation units does not affect the normal function and installation requirements of the junction box.

[0019] 3. The present invention has reasonable design, simple structure, good heat dissipation performance, energy-saving advantages and is conducive to ensuring the working performance of the unit, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is an exploded view of the cooling device and the motor tail structure for the Roots water ring vacuum unit;

[0022] Figure 2 An axonometric diagram of a cooling device for a Roots water ring vacuum unit provided in an embodiment;

[0023] Figure 3 A side view of a cooling device for a Roots water ring vacuum unit provided in an embodiment;

[0024] Figure 4 A front view of a cooling device for a Roots water ring vacuum unit provided in an embodiment;

[0025] Figure 5 An axonometric view of a motor provided in an embodiment;

[0026] Figure 6 A cross-sectional view of a cooling device for a Roots water ring vacuum unit provided in an embodiment;

[0027] Figure 7 An exploded view of a housing heat dissipation unit provided in an embodiment;

[0028] Figure 8 A cross-sectional view of a housing heat dissipation unit provided in an embodiment;

[0029] Fig. 9 A schematic diagram of the interior of a rear housing provided in an embodiment;

[0030] Fig.10 An enlarged schematic diagram of an end portion of a partition member provided in an embodiment;

[0031] In the above figures:

[0032] 1. Motor; 2. Spindle; 3. Motor main housing; 31. Heat dissipation strip hole; 4. Front cover; 5. Rear cover; 6. Rear housing; 61. Louver grille; 62. Axial pipe column; 63. Diversion groove; 7. Junction box; 8. Base; 81. Base unit; 811. Bottom plate; 812. Support plate; 82. Bridge plate; 9. Pump body; 10. Heat dissipation impeller; 11. Ceramic heat dissipation column core; 111. Ceramic groove; 12. Fixing Heat dissipation fins; 13, shell heat dissipation unit; 131, heat dissipation clamp; 1311, clamping mouth; 1312, positioning groove; 132, porous ceramic plate core; 1321, positioning protrusion; 1322, installation notch; 1323, lower roller groove; 1324, positioning hole; 1325, slide groove; 133, partition member; 134, support roller; 135, spring positioning member; 136, stopper; 137, countersunk bolt. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0035] Examples, such as Figures 1 to 10 As shown, the cooling device for the Roots water ring vacuum unit provided by the present invention comprises a motor 1, the motor 1 comprises a main shaft 2, a motor main housing 3, a front cover 4, a rear cover 5, a rear housing 6, a junction box 7 and a base 8, a pump body 9 is arranged at one end of the main shaft 2, a working impeller (not shown in the figure) is arranged inside the pump body 9, a heat dissipation impeller 10 located between the rear cover 5 and the rear housing 6 is arranged at the other end of the main shaft 2, and a louver grille 61 is arranged on the end surface of the rear housing 6. Among them, the heat dissipation impeller 10 is coaxially connected with the main shaft 2 and rotates synchronously with the main shaft 2. When the Roots water ring vacuum unit is working, the hot air between the rear cover 5 and the rear housing 6 is exchanged with the air in the working environment of the device through the louver grille 61 to achieve the purpose of heat dissipation. The main shaft 2, the front cover 4, the rear cover 5, the rear housing 6, the junction box 7, the pump body 9 and the working impeller are existing mature technologies, and this embodiment will not be repeated here.

[0036] On this basis, the rear shell 6 provided by the present invention is provided with a plurality of axial tube columns 62 at a position near its edge, the tube holes of the axial tube columns 62 are tangent to the shell wall of the rear shell 6, and a ceramic heat dissipation column core 11 is provided in the tube holes. The motor main shell 3 includes a shell, and a plurality of fixed heat dissipation fins 12 distributed at both ends of the terminal box 7 are provided on the shell. The shell is provided with a plurality of equally distributed heat dissipation strip holes 31 at positions other than the fixed heat dissipation fins 12. The shell is provided with a plurality of shell heat dissipation units 13 corresponding to the heat dissipation strip holes 31 one by one. The shell heat dissipation unit 13 includes a pair of heat dissipation clamps 131 distributed on both sides of the heat dissipation strip holes 31, and a porous ceramic plate core 132 is provided between the heat dissipation clamps 131. One end of the porous ceramic plate core 132 extends toward the center direction of the motor 1, and the other end of the porous ceramic plate core 132 is pressed on the top of the heat dissipation clamp 131. A partition member 133 is provided in the center of the porous ceramic plate core 132. The partition member 133 has a T-shaped structure and its top surface covers the top surface of the porous ceramic plate core 132.

[0037] Specifically, on the one hand, the device realizes heat dissipation of the tail of the motor 1 by continuously rotating the heat dissipation impeller 10 coaxially connected to the main shaft 2. On the other hand, the hot air between the rear shell 6 and the rear end cover 5 obtains dynamic potential energy, a part of the gas can be transmitted through the louver grille 61, and a small part is transmitted outward through the ceramic heat dissipation column core 11. The ceramic heat dissipation column core 11 can accelerate the heat dissipation of the rear shell 6 itself in the form of heat conduction, which has a better heat dissipation effect than the rear shell 6 made of all-metal materials, and improves the heat dissipation performance of the tail end of the motor 1. On the other hand, the present invention dissipates heat from the motor main shell 3 and its internal rotor and stator working chambers by arranging multiple shell heat dissipation units 13 on the surface of the motor main shell 3, effectively improving the heat dissipation and cooling performance of the Roots water ring vacuum unit during operation.

[0038] More specifically, regarding the shell heat dissipation unit 13, the design of multiple pairs of heat dissipation clamps 131 not only increases the actual heat dissipation area of ​​the motor main shell 3, but also provides an assembly space for the porous ceramic plate core 132, so that the porous ceramic plate core 132 can promote the heat dissipation of the motor 1; the porous ceramic plate core 132 builds a microporous channel between the inside of the motor main shell 3 and the external environment of the equipment, so that the heat generated by the continuous operation of the motor 1 is transferred in the telecentric direction and transferred to the outside through the porous ceramic plate core 132, thereby obtaining a better heat dissipation effect; in addition to having good heat dissipation performance, the porous ceramic plate core 132 also has adsorption and filtration, insulation and other properties, and the spatial arrangement of all shell heat dissipation units 13 does not affect the normal function and installation requirements of the junction box 7. On the basis of meeting the basic working requirements of the Roots water ring vacuum unit, it effectively realizes real-time heat dissipation and cooling without adding additional power equipment, which meets the energy-saving requirements of the industrial production link.

[0039] In order to ensure the electrical sealing of the motor 1 in the direction of the shell heat dissipation unit 13, the bottom of the heat dissipation clamp 131 provided by the present invention is welded to the shell, and the two ends of the same pair of heat dissipation clamps 131 are connected by countersunk bolts 137. The end face of the heat dissipation clamp 131 is a trapezoidal structure and it is sealed and docked with another heat dissipation clamp 131. The opposite back faces of the same pair of heat dissipation clamps 131 are both inclined surfaces and have an isosceles structure. The opposite faces of the same pair of heat dissipation clamps 131 are provided with clamping openings 1311 corresponding to the heat dissipation strip holes 31, and the length of the clamping opening 1311 is less than the axial length of the heat dissipation clamp 131. In this way, before the porous ceramic core 132 and the partition 133 are installed, the clamping opening 1311 between the heat dissipation clamps 131 can be opened to a certain diameter, and after the porous ceramic core 132 and the partition 133 are installed, the assembly can be completed by the countersunk bolts 137; at the same time, the two ends of the heat dissipation clamps 131 automatically complete the docking seal, the clamping opening 1311 is assembled by the porous ceramic core 132, and the partition 133 protects the top and both ends of the porous ceramic core 132, reducing the probability of the porous ceramic core 132 being damaged. On the basis of ensuring the effective assembly of all structures of the shell heat dissipation unit 13, the direct exchange area and gap between the inner cavity of the motor 1 and the outside world are reduced, ensuring the most basic electrical sealing of the unit, which is conducive to the effective and safe vacuum operation of the unit.

[0040] In order to improve the positioning effect of the porous ceramic core 132 between the heat dissipation clamps 131, the porous ceramic core 132 provided by the present invention is in a T-shaped structure and a mounting groove 1322 for mounting a partition member is arranged at the center thereof, and multiple positioning protrusions 1321 are arranged on both sides of the porous ceramic core 132 and are distributed at intervals along its length direction. The positioning protrusions 1321 cooperate with the positioning grooves 1312 arranged on the inner wall of the clamping opening 1311. Among them, the two sides of the top of the porous ceramic plate core 132 are tangentially oriented toward the top of the heat dissipation clamp 131, and have heat exchange sections in multiple directions, which is beneficial to accelerate the heat dissipation of the motor main shell 3 itself; the positioning protrusion 1321 is a part of the porous ceramic plate core 132, and is also a microporous ceramic material. When the two heat dissipation clamps 131 are clamped by the countersunk bolts 137, the positioning protrusion 1321 can be stuck in the installation slot 1322, effectively ensuring the assembly performance of the heat dissipation clamp 131 and the porous ceramic plate core 132, which is beneficial to the heat dissipation of the motor main shell 3 itself, and is also beneficial to ensuring the electrical working performance of the motor 1.

[0041] In order to improve the actual service life of the porous ceramic core 132, the present invention uses a partition member 133 to protect the top of the porous ceramic core 132, and considering the stress, the present invention provides a plurality of pairs of lower roller grooves 1323 symmetrically distributed about the mounting notch 1322 on the top surface of the porous ceramic core 132, the lower roller grooves 1323 are opposite to the upper roller grooves provided on the partition member 133, and support rollers 134 are provided in the upper roller grooves and the lower roller grooves 1323. The support rollers 134 are provided to resist the pressure on the surface of the porous ceramic core 132, so that the load resistance of the surface of the porous ceramic core 132 can be improved, which is conducive to extending its actual service life.

[0042] Furthermore, the support roller 134 provided by the present invention is a conical structure, and the small bottom ends of the support rollers 134 on both sides of the mounting groove 1322 are relatively arranged. By arranging two rows of support rollers 134, the force uniformity between the top surface of the porous ceramic plate core 132 and the partition member 133 can be improved, which is beneficial to ensure the integrity of the porous ceramic plate core 132 under long-term service conditions and improve the comprehensive utilization rate of the unit in industrial production.

[0043] In order to improve the rapid assembly performance of the porous ceramic core 132 and the partition member 133, the porous ceramic core 132 provided by the present invention is provided with a plurality of positioning holes 1324 that penetrate the installation slot 1322 on both sides, and the positioning holes 1324 cooperate with the spring positioning members 135 arranged on both sides of the partition member 133, and the spring positioning members 135 are arranged in the countersunk holes opened on the side of the partition member 133, and the spring positioning members 135 include a plurality of spring sheets that arc toward the positioning holes 1324. Among them, all the spring sheets on the same spring positioning member 135 can be completely pressed back into the countersunk holes under compression conditions, and if part of the pressure is released, the ends thereof can restore the curvature in the direction of deviating from the side of the partition member 133; therefore, in the process of assembling the partition member 133 along the direction of the installation slot 1322, the spring positioning member 135 is first pressed into the countersunk hole, and after the spring positioning member 135 enters the range where the positioning hole 1324 is located, its stretching effect can make it effectively stuck in the positioning hole 1324. When releasing the assembly relationship between the porous ceramic core 132 and the partition member 133, a rod tool is inserted into the positioning hole 1324 to compress the corresponding spring positioning member 135, and then the disassembly can be completed. The design is reasonable, the structure is simple and the cost is low.

[0044] In order to prevent the spring positioning member 135 under compression from causing obvious scratches on the inner wall of the porous ceramic core 132, the present invention provides a plurality of slide grooves 1325 on both sides of the installation slot 1322. The slide grooves 1325 correspond to the positioning holes 1324 and have open tops. During the process of disassembling and assembling the partition member 133, the spring positioning member 135 under compression can move along the direction of the slide grooves 1325. The slide grooves 1325 provide a positioning reference for the disassembly and assembly of the partition member 133 and also allow the spring positioning member 135 to complete the disassembly and assembly with less resistance, thereby reducing the probability of scratching the porous ceramic core 132.

[0045] In order to improve the protective effect of the partition member 133 on the top of the porous ceramic core 132, in addition to reserving a sufficient heat exchange cross-section for the porous ceramic core 132, considering that the two ends of the motor 1 are more susceptible to bumps, the present invention provides blocks 136 at both ends of the partition member 133, and the ends of the blocks 136 are flush with the ends of the heat dissipation clamping plate 131. The blocks 136 are used to protect the two ends of the porous ceramic core 132 to ensure the integrity of the porous ceramic core 132.

[0046] Regarding the position on the motor main housing 3 close to the junction box 7, the side of the junction box 7 is cooled by fixing the heat dissipation fins 12, and the other parts on the motor main housing 3 are effectively arranged with the shell heat dissipation unit 13, so as to meet the overall design of the basic structure of the motor 1 without affecting the electrical connection devices. In accordance with this, the base 8 provided by the present invention includes two pairs of base units 81 symmetrically distributed about the main axis 2, and a bridge plate 82 is welded between the base units 81 on the same side. The base unit 81 includes a bottom plate 811, and the bottom plate 811 is provided with two support plates 812 connected to the shell at different angles. In this way, by setting up a plurality of base units 81, not only can the installation nodes of the shell heat dissipation unit 13 be effectively avoided, but also an effective basic support function can be provided, especially each base unit 81 has two support line contacts with the motor main housing 3, thereby ensuring that the unit can be effectively and stably installed in the production workshop.

[0047] In order to improve the heat dissipation performance of the tail end of the motor 1, the present invention provides a flow guide groove 63 at the part of the axial column 62 located inside the rear shell 6, and the end of the ceramic heat dissipation column core 11 is provided with a ceramic groove 111 that matches the flow guide groove 63. In this way, on the basis of making the ceramic heat dissipation column core 11 have a certain axial length, the cutout for the ceramic heat dissipation column core 11 to contact with hot air is also increased, which is beneficial to its contact with flowing air. In addition, the tube hole of the axial column 62 is tangent to the shell wall of the rear shell 6, which is beneficial to promote solid-solid and solid-gas heat exchange, thereby improving the heat dissipation performance of the tail end of the motor 1.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A cooling device for a Roots water ring vacuum unit, comprising a motor, the motor comprising a main shaft, a motor main housing, a front cover, a rear cover, a rear housing, a junction box and a base, a pump body is arranged at one end of the main shaft, a working impeller is arranged inside the pump body, a heat dissipation impeller is arranged at the other end of the main shaft between the rear cover and the rear housing, a louver grille is arranged on the end surface of the rear housing, characterized in that: The rear shell is provided with a plurality of axial tube columns near its edge, the tube holes of the axial tube columns are tangent to the shell wall of the rear shell, and a ceramic heat dissipation column core is provided in the tube holes, the motor main shell includes a shell, and a plurality of fixed heat dissipation fins distributed at both ends of the terminal box are provided on the shell, and a plurality of equally distributed heat dissipation strip holes are provided on the shell except for the positions where the fixed heat dissipation fins are located, and a plurality of shell heat dissipation units corresponding to the heat dissipation strip holes are provided on the shell, and the shell heat dissipation units include a pair of heat dissipation splints distributed on both sides of the heat dissipation strip holes, a porous ceramic plate core is provided between the heat dissipation splints, one end of the porous ceramic plate core extends toward the center direction of the motor, and the other end of the porous ceramic plate core is pressed on the top of the heat dissipation splint, and a partition member is provided in the center of the porous ceramic plate core, and the partition member is in a T-shaped structure and its top surface covers the top surface of the porous ceramic plate core.

2. The cooling device for a Roots water ring vacuum unit according to claim 1, characterized in that: The bottom of the heat dissipation clamp is welded to the shell, and the two ends of the same pair of heat dissipation clamps are connected by countersunk bolts. The end face of the heat dissipation clamp is a trapezoidal structure and it is sealed and docked with another heat dissipation clamp. The opposite back faces of the same pair of heat dissipation clamps are both inclined and have an isosceles structure. The opposite faces of the same pair of heat dissipation clamps are provided with clamping openings corresponding to the heat dissipation strip holes, and the length of the clamping openings is less than the axial length of the heat dissipation clamp.

3. The cooling device for a Roots water ring vacuum unit according to claim 2, characterized in that: The porous ceramic plate core is in a T-shaped structure and has a mounting groove in the center for mounting a partition member. Both sides of the porous ceramic plate core are provided with a plurality of positioning protrusions spaced along its length, and the positioning protrusions cooperate with the positioning grooves arranged on the inner wall of the clamping opening.

4. The cooling device for a Roots water ring vacuum unit according to claim 3, characterized in that: The top surface of the porous ceramic core is provided with a plurality of pairs of lower roller grooves symmetrically distributed about the mounting notches, the lower roller grooves are opposite to the upper roller grooves provided on the partition member, and support rollers are provided in the upper roller grooves and the lower roller grooves.

5. The cooling device for a Roots water ring vacuum unit according to claim 4, characterized in that: The support roller is a conical structure, and the small bottom ends of the support rollers on both sides of the installation slot are arranged opposite to each other.

6. The cooling device for a Roots water ring vacuum unit according to any one of claims 3, 4 and 5, characterized in that: Multiple positioning holes that penetrate the installation slots are arranged on both sides of the porous ceramic plate core. The positioning holes cooperate with spring positioning parts arranged on both sides of the partition member. The spring positioning parts are arranged in countersunk holes opened on the sides of the partition member. The spring positioning parts include multiple spring sheets that are arced toward the positioning holes.

7. The cooling device for a Roots water ring vacuum unit according to claim 6, characterized in that: A plurality of slide grooves are arranged on both sides of the installation notch, the slide grooves correspond to the positioning holes and the tops of the slide grooves are open.

8. The cooling device for a Roots water ring vacuum unit according to claim 1, characterized in that: Stoppers are arranged at both ends of the partition member, and the ends of the stoppers are flush with the ends of the heat dissipation clamping plate.

9. The cooling device for a Roots water ring vacuum unit according to claim 1, characterized in that: The base comprises two pairs of base units symmetrically distributed about the main axis, a bridge plate is welded between the base units on the same side, and the base unit comprises a bottom plate, on which two support plates obliquely connected to the shell at different angles are arranged.

10. The cooling device for a Roots water ring vacuum unit according to claim 1, characterized in that: The portion of the axial tube column located on the inner side of the rear shell is provided with a flow guide groove, and the end of the ceramic heat dissipation column core is provided with a ceramic groove matched with the flow guide groove.

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