Dual-output packaging motor for roots vacuum pump

Abstract

The utility model relates to the technical field of motors for vacuum pumps, in particular to a dual-output packaging motor for a roots vacuum pump. Comprising a stator and two rotors installed in the stator, the rotors and the stator are spaced through an isolation sleeve, and the isolation sleeve and the stator are packaged through glue; the motor further comprises a cooling channel used for cooling the stator, and a water inlet and a water outlet of the cooling channel are formed in the two sides of the stator respectively. The utility model provides the dual-output packaging motor for the roots vacuum pump, which has the advantages of wide application range, high heat dissipation efficiency, long service life, simple structure, convenience in assembly and disassembly and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of motors for vacuum pumps, in particular to a double-output packaged motor for a Roots vacuum pump. Background Art

[0002] Roots vacuum pumps have been tested by long-term operation in devices such as petroleum, chemical industry, plastics, pesticides, turbine rotor dynamic balancing, aerospace space simulation, etc., so they have been vigorously promoted and applied in China, and are also widely used in industries such as petroleum, chemical industry, metallurgy, and textiles.

[0003] Chinese patent CN103107647B discloses a motor for a dry vacuum pump, including a motor housing, a stator and a rotor, wherein a stator with a cavity is provided in the motor housing, the rotor is mounted on the driving shaft of the dry vacuum pump and is located in the cavity of the stator; the stator and the pump body are positioned by a stopper. The present invention completely solves the problems of shaft seal leakage and starting impact, transforms the dynamic seal between the pump and the shaft into a static seal between the motor stator and the pump, and does not require lubricating fluid, completely solves the problems of shaft seal leakage and medium contamination, and at the same time solves the problems of high-frequency vibration and starting impact noise caused by the rigid coupling, and the motor as a whole can be disassembled at will, which is convenient for maintenance, easy to install, and has a short maintenance period, saving time and effort, and reducing costs.

[0004] However, the motor of this technical solution has only one main shaft. When the power of the installed pump body is too large, the motor cannot drive it to work. It has great limitations and a small scope of application. In addition, the heat dissipation effect of the motor is not good, and the motor performance will decrease after long-term use. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the prior art and provide a dual-output packaged motor for a Roots vacuum pump. By installing two rotors on a single motor and cooperating with a main shaft corresponding to the rotors, the function of driving a high-power pump body to operate is realized, thereby solving the problem that the single-axis motor of the prior art cannot drive a high-power pump body to operate.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A dual-output packaged motor for a Roots vacuum pump comprises a stator and two rotors installed in the stator, wherein the rotors and the stator are spaced apart by an isolation sleeve, and the isolation sleeve and the stator are packaged by glue.

[0008] Preferably, it further comprises a cooling channel for cooling the stator, and a water inlet and a water outlet of the cooling channel are respectively arranged on both sides of the stator.

[0009] Preferably, the cooling channel is arranged inside the stator.

[0010] Preferably, the cooling channel is arranged inside the stator along the side length of the stator.

[0011] Preferably, a main shaft is connected inside the rotor, one end of the main shaft is integrally connected to one end of the rotor through a pressure plate and a fastener, and the other end extends out of the rotor to generate driving force.

[0012] Preferably, the other end of the main shaft limits the rotor via a shaft sleeve.

[0013] Preferably, it further comprises a frequency converter, wherein the frequency converter is installed on the top plane of the stator.

[0014] Preferably, a temperature sensor is provided inside the stator.

[0015] The beneficial effects of the utility model are:

[0016] (1) The utility model installs two sets of rotors, and the main shafts are also correspondingly provided with two sets, which are connected in parallel inside the stator to form a dual-output motor, so as to reduce the resistance of the motor operation, make the motor operation more convenient, improve the working efficiency, can well meet the requirements of energy saving and speed regulation, have excellent operating performance, and have a wider range of applications.

[0017] (2) The utility model adopts aluminum alloy material in the stator and has a built-in water cooling pipe. The aluminum alloy has good thermal conductivity and high heat dissipation efficiency. The built-in cooling system can remove the heat generated by the motor during operation through heat exchange between water and the motor. The utility model has a small size, high integration, light weight, and is easy to disassemble and assemble.

[0018] (3) The utility model seals and protects the stator and the rotor by potting. The potted motor has good sealing performance and reduces the requirements for internal seals. During the operation of the vacuum pump, the interior is in a vacuum environment, and the potted motor is isolated from the outside. In addition, the motor in the vacuum state runs at high speed with the advantages of low vibration and low noise.

[0019] (4) The utility model adopts the method of installing a permanent magnet on the pump head rotor, which is driven in one piece, has a simple structure and is easy to operate.

[0020] In summary, the utility model has the advantages of wide application range, high heat dissipation efficiency, long service life, simple structure and convenient disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 An exploded view of the components of the utility model;

[0023] Figure 3 It is a cross-sectional view of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the cooling channel of the utility model;

[0025] Figure 5 This is a schematic diagram of the utility model installed on a pump body.

[0026] Figure numerals: 1-stator; 11-isolation sleeve; 12-glue; 13-cooling channel; 131-water inlet; 132-water outlet; 2-rotor; 21-spindle; 22-pressure plate; 23-fastener; 24-shaft sleeve; 3-inverter; 4-temperature sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] Example

[0030] like Figure 1-5As shown, this embodiment provides a dual-output packaged motor for a Roots vacuum pump, including: a stator 1 and two rotors 2 installed in the stator 1, the rotor 2 and the stator 1 are spaced by an isolation sleeve 11, and the isolation sleeve 11 and the stator 1 are packaged by glue 12. By installing two groups of rotors 2, two groups of main shafts 21 are also correspondingly provided, which are connected in parallel inside the stator 1 to form a dual-output motor, so as to reduce the resistance of the motor operation, make the motor operation more convenient, improve the work efficiency, can well meet the requirements of energy saving and speed regulation, have excellent operating performance, and have a wider range of applications.

[0031] Among them, the potting protection is mainly achieved by using a specific potting glue 12 to seal the key parts such as the electronic components and coils inside the motor. After mixing, it has the characteristics of high viscosity, long operation time and good processability, which means that the staff can have more time to complete the potting operation when using it, while ensuring the stability and uniformity of the potting process. When the potting glue is cured, it shows excellent temperature resistance. Whether it is a high temperature or low temperature environment, it can maintain stable physical and chemical properties, providing continuous and reliable protection for the motor. It also has good insulation performance and chemical corrosion resistance, which can ensure that the electronic components inside the motor are not disturbed by external factors during normal operation, and there is no oil leakage or air leakage.

[0032] At the same time, the motor also includes a cooling channel 13 for cooling the stator 1. The water inlet 131 and the water outlet 132 of the cooling channel 13 are respectively arranged on both sides of the stator 1. Cold water is introduced to cool the stator 1 to avoid overheating of the motor, improve heat dissipation efficiency, and ensure the working efficiency of the motor.

[0033] In this embodiment, the cooling channel 13 is disposed inside the stator 1. It should be noted that the cooling channel 13 is placed inside the stator 1 when the stator 1 is cast, so as to improve the cooling effect.

[0034] In this embodiment, the cooling channel 13 is arranged inside the stator 1 along the side length of the stator 1. The cooling channel 13 is preferably made of aluminum alloy. Aluminum alloy has good thermal conductivity and high heat dissipation efficiency. The heat generated by the motor during operation is brought out through heat exchange between water and the motor. It has a small size, high integration, light weight, and is easy to disassemble and assemble.

[0035] In this embodiment, a main shaft 21 is connected inside the rotor 2, one end of the main shaft 21 is connected to one end of the rotor 2 through a pressure plate 22 and a fastener 23, and the other end extends out of the rotor 2 to generate a driving force, thereby ensuring that the rotor 2 can work normally without jamming.

[0036] In this embodiment, the other end of the main shaft 21 limits the rotor 2 through the shaft sleeve 24, and the permanent magnet is installed on the pump head rotor 2, which is driven as a whole, has a simple structure, and is easy to operate.

[0037] Of course, the motor also includes a frequency converter 3, which is installed on the top plane of the stator 1. The frequency converter 3 and the motor share a water cooling system. The cooling plate formed by the top plane of the stator 1 can reduce the additional cooling method of the frequency converter 3, reduce the size of the motor, reduce the volume, and improve the integration of the equipment. The water-cooled frequency converter 3 changes the power supply frequency and then changes the compressor motor speed to achieve a variable cooling capacity that matches the actual heat load. The speed can be changed rapidly, which is more efficient and energy-saving than a fixed-frequency unit.

[0038] In addition, a temperature sensor 4 is provided inside the stator 1. The temperature sensor 4 refers to a sensor that can sense temperature and convert it into a usable output signal. There are many varieties. The present embodiment is preferably a PTC temperature sensor 4, which can detect when the motor is overheated by the resistance change caused by the temperature change. And through the unique self-heating application of the PTC thermistor, it can increase the current to increase its own resistance value and then suppress the current, thereby realizing the function of protecting the circuit and extending the service life of the motor.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-output packaged motor for a Roots vacuum pump, characterized in that: include: A stator and two rotors installed in the stator, the rotor and the stator are spaced by an isolation sleeve, and the isolation sleeve and the stator are packaged by glue.

2. A dual-output packaged motor for a Roots vacuum pump according to claim 1, characterized in that: It also includes a cooling channel for cooling the stator, and a water inlet and a water outlet of the cooling channel are respectively arranged on both sides of the stator.

3. A dual-output packaged motor for a Roots vacuum pump according to claim 2, characterized in that: The cooling channel is arranged inside the stator.

4. A dual-output packaged motor for a Roots vacuum pump according to claim 3, characterized in that: The cooling channel is arranged inside the stator along the side length of the stator.

5. A dual-output packaged motor for a Roots vacuum pump according to claim 1, characterized in that: A main shaft is connected inside the rotor, one end of the main shaft is connected to one end of the rotor through a pressure plate and a fastener, and the other end extends out of the rotor to generate driving force.

6. A dual-output packaged motor for a Roots vacuum pump according to claim 5, characterized in that: The other end of the main shaft limits the rotor through a shaft sleeve.

7. A dual-output packaged motor for a Roots vacuum pump according to claim 1, characterized in that: The invention also comprises a frequency converter, wherein the frequency converter is installed on the top plane of the stator.

8. A dual-output packaged motor for a Roots vacuum pump according to claim 1, characterized in that: A temperature sensor is arranged inside the stator.

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