Screw booster pump
By setting heat dissipation channels and cooling liquid flow at both ends of the screw booster pump, the problem of poor heat dissipation effect of the Roots booster pump is solved, and efficient water-cooled cooling is achieved, which significantly reduces the working temperature and improves the service life.
Patent Information
- Application Number
- CN202421117948.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-21
AI Technical Summary
During the high-speed rotation of the traditional Roots booster pump, the heat dissipation effect is poor due to the contact between the end and the pump housing, resulting in high temperatures in the pump body and internal airflow, affecting normal use.
The first and second heat dissipation channels are arranged at both ends of the screw booster pump, and the water-cooled cooling is achieved through the circulation of coolant, and the left end cover and the right end cover are efficiently dissipated to prevent the pump body from producing high temperature and high pressure.
It significantly reduces the operating temperature of the booster pump from 130°-140° to 40°-50°, greatly improving the service life and preventing the high temperature of the fuel tank from affecting the transmission system.
Smart Images
Figure CN222208272U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of boosting equipment, in particular to a screw booster pump. Background technology:
[0002] Roots booster pump is a high-efficiency, oil-free, low-maintenance vacuum equipment, widely used in industrial and scientific research fields that require high cleanliness and pollution-free environment. Its working principle is based on two synchronous counter-rotating rotors with a shape similar to the figure of "8". The gas is sucked, compressed and discharged through the change of space formed between the rotor and the pump chamber. Since this design does not require the use of oil as a lubricant or sealant, oil pollution is avoided and high cleanliness is ensured. It is particularly suitable for occasions with extremely high environmental requirements such as semiconductor manufacturing, food processing and pharmaceutical industries.
[0003] For example: the vacuum pump with Chinese patent application number 202310073318.1 is a typical Roots booster pump protected by this patent. As the technical solution disclosed in this patent, a pair of Roots rotors of the Roots booster pump will always be in contact with the inner wall of the rotor chamber 5 during operation. Therefore, the inner wall will generate heat due to friction during the high-speed rotation of the Roots rotor. Therefore, it is necessary to dissipate heat from the pump housing 6. The traditional heat dissipation method usually adopts air cooling. Since air cooling is achieved by taking away the heat from the outer wall of the pump housing 6, the contact area between the ends of the Roots rotor and the end faces of the pump housing 6 is the largest when the Roots rotor rotates, and the heat generated is also the largest. Since drive modules and transmission modules are also provided at both ends of the Roots rotor, the heat at both ends of the pump housing cannot be effectively taken away during air cooling, resulting in poor heat dissipation. After working for a long time, it is easy to cause high temperatures of the pump body and internal airflow, affecting normal use.
[0004] In view of this, the inventor proposes the following technical solution. Utility model content:
[0005] The utility model aims to overcome the deficiencies of the prior art and provide a screw booster pump.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a screw booster pump, comprising: a pump body, a pair of Roots rotors rotatably installed in the pump body, and a driving device arranged at one end of the pump body and used to drive the pair of Roots rotors to rotate, the pump body is provided with an air inlet and an air outlet symmetrically located on both sides of the pair of Roots rotors, the left end cover and the right end cover at both ends of the pump body are respectively provided with a first heat dissipation channel and a second heat dissipation channel for circulating coolant, and the end faces of the pair of Roots rotors are respectively in contact with the inner side faces of the left end cover and the right end cover.
[0007] Furthermore, in the above technical solution, the first heat dissipation channel and the second heat dissipation channel are respectively integrally injection molded in the left end cover and the right end cover, or the first heat dissipation channel and the second heat dissipation channel are heat dissipation pipes respectively arranged in the left end cover and the right end cover.
[0008] Furthermore, in the above technical solution, further, in the above technical solution, the first heat dissipation channel and the second heat dissipation channel are respectively bent in a serpentine shape and wound around the left end cover and the right end cover.
[0009] Furthermore, in the above technical solution, the first heat dissipation channel and the second heat dissipation channel are respectively arranged in a "U" shape in the left end cover and the right end cover.
[0010] Furthermore, in the above technical solution, a first oil tank and a second oil tank are respectively provided at both ends of the pump body, and a connecting pipe is provided between the first oil tank and the second oil tank, and the connecting pipe is located in the inner cavity of the pump body.
[0011] Furthermore, in the above technical solution, the driving device is a motor, the output shaft of the motor is connected to one end of a pair of Roots rotors, the other ends of the pair of Roots rotors are provided with mutually meshing gears for linkage, and the two ends of the pair of Roots rotors are respectively located in the first oil tank and the second oil tank.
[0012] Furthermore, in the above technical solution, the left end cover and the right end cover are respectively provided with a first sealing ring groove and a second sealing ring groove on both sides, and an annular sealing ring is installed in the first sealing ring groove and the second sealing ring groove; the left end cover and the right end cover are also provided with a sealing gasket assembly which is sleeved and installed on both ends of a pair of Roots rotors.
[0013] Furthermore, in the above technical solution, the left end cover and the right end cover are both in the shape of double-hole flanges and are symmetrically installed at both ends of the pump body, wherein the sealing gasket assembly is installed in the two axial holes in the middle of the left end cover and the right end cover, and the first sealing ring groove and the second sealing ring groove are arranged on the outer edges of the left end cover and the right end cover.
[0014] Furthermore, in the above technical solution, a low-pressure chamber and a high-pressure chamber respectively connected to the air inlet and the air outlet are provided in the pump body, and a boosting chamber for a pair of Roots rotors to rotate is provided between the low-pressure chamber and the high-pressure chamber, and the pair of Roots rotors always keep in contact with the inner wall of the boosting chamber, and divide the boosting chamber into two parts in contact with the low-pressure chamber and the high-pressure chamber.
[0015] Further, in the above technical scheme, further, in the above technical scheme, a pressure relief valve is also arranged between the low-pressure chamber and the high-pressure chamber, and the pressure relief valve includes an air relief cover fixed on the pump body, a pressure relief cover slidably mounted on the air relief cover and capable of separating the low-pressure chamber and the high-pressure chamber, and a pressure-recombining spring for pushing the pressure relief cover to always keep the low-pressure chamber and the high-pressure chamber separated, and when the pressure in the high-pressure chamber is greater than the thrust generated by the pressure-recombining spring, the pressure relief cover is pushed open to connect the high-pressure chamber with the low-pressure chamber.
[0016] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: in the utility model, a first heat dissipation channel and a second heat dissipation channel are set in the left end cover and the right end cover at both ends of the pump body for water cooling, thereby achieving efficient heat dissipation of the left end cover and the right end cover, preventing the pump body from generating high temperature and high pressure during operation, thereby greatly improving the service life of the booster pump. Description of the drawings:
[0017] Figure 1 The utility model is a three-dimensional Figure 1 ;
[0018] Figure 2 The internal structure of the utility model Figure 1 ;
[0019] Figure 3 The internal structure of the utility model Figure 2 ;
[0020] Figure 4 The internal structure of the utility model Figure 3 ;
[0021] Figure 5 It is a three-dimensional structure of the left end cover in the utility model. Figure 1 ;
[0022] Figure 6 It is a three-dimensional structure of the left end cover in the utility model. Figure 2 ;
[0023] Figure 7 The utility model is a three-dimensional Figure 2 . Specific implementation method:
[0024] The utility model is further described below in conjunction with specific embodiments and drawings.
[0025] See Figures 1 to 7As shown, a screw booster pump comprises: a pump body 1, a pair of Roots rotors 2 rotatably mounted in the pump body 1, and a driving device 3 arranged at one end of the pump body 1 and used to drive the pair of Roots rotors 2 to rotate, the pump body 1 is provided with an air inlet 11 and an air outlet 12 symmetrically located on both sides of the pair of Roots rotors 2, the left end cover 4 and the right end cover 5 at both ends of the pump body 1 are respectively provided with a first heat dissipation channel 40 and a second heat dissipation channel 50 for circulating coolant, and the end faces of the pair of Roots rotors 2 are respectively in contact with the inner side faces of the left end cover 4 and the right end cover 5. The first heat dissipation channel 40 and the second heat dissipation channel 50 are arranged in the left end cover 4 and the right end cover 5 at both ends of the pump body 1 for water cooling, thereby achieving efficient heat dissipation of the left end cover 4 and the right end cover 5, preventing the pump body 1 from generating high temperature and high pressure during operation, thereby greatly improving the service life of the booster pump. In actual use, when the traditional heat dissipation method is adopted, the working temperature of the booster pump can reach 130°-140°. After adopting the solution of the utility model, the working temperature of the booster pump can be reduced to 40°-50°, the heat dissipation effect is obvious, and the service life of the booster pump can be greatly improved.
[0026] The first heat dissipation channel 40 and the second heat dissipation channel 50 are respectively integrally injection molded in the left end cover 4 and the right end cover 5, or the first heat dissipation channel 40 and the second heat dissipation channel 50 are heat dissipation pipes respectively arranged in the left end cover 4 and the right end cover 5. In one embodiment, the first heat dissipation channel 40 and the second heat dissipation channel 50 are integrally molded in the left end cover 4 and the right end cover 5, and the material of the left end cover 4 and the right end cover 5 can be cast iron, stainless steel, aluminum, and copper with better thermal conductivity can also be used. In another embodiment, the first heat dissipation channel 40 and the second heat dissipation channel 50 are both copper heat dissipation pipes, which are arranged in the left end cover 4 and the right end cover 5 by in-mold injection molding.
[0027] The first heat dissipation channel 40 and the second heat dissipation channel 50 are respectively bent in a serpentine shape and wound in the left end cover 4 and the right end cover 5. The first heat dissipation channel 40 and the second heat dissipation channel 50 are wound in a serpentine shape in the left end cover 4 and the right end cover 5, which can effectively take away the heat of the left end cover 4 and the right end cover 5.
[0028] The first heat dissipation channel 40 and the second heat dissipation channel 50 are respectively arranged in a "U" shape in the left end cover 4 and the right end cover 5. The first heat dissipation channel 40 and the second heat dissipation channel 50 are arranged in a "U" shape in the left end cover 4 and the right end cover 5, which is convenient for injection molding. The water inlet and outlet of the first heat dissipation channel 40 and the second heat dissipation channel 50 are both located at the bottom of the left end cover 4 and the right end cover 5.
[0029] The two ends of the pump body 1 are respectively provided with a first oil tank 6 and a second oil tank 7, and a connecting pipe 8 is provided between the first oil tank 6 and the second oil tank 7, and the connecting pipe 8 is located in the inner cavity of the pump body 1. The two ends of the pair of Roots rotors 2 respectively penetrate the left end cover 4 and the right end cover 5, and extend into the first oil tank 6 and the second oil tank 7. The driving device 3 is a motor, the output shaft of the motor is connected to one end of the pair of Roots rotors 2, the other end of the pair of Roots rotors 2 is provided with mutually meshing gears for linkage, and the two ends of the pair of Roots rotors 2 are respectively located in the first oil tank 6 and the second oil tank 7. In order to ensure the long-term and efficient rotation of the Roots rotors, the first oil tank 6 and the second oil tank 7 are usually provided at the two ends of the booster pump to lubricate the transmission system. Since the heat generated at the two ends of the booster pump is greater when the booster pump is working, the first heat dissipation channel 40 and the second heat dissipation channel 50 are provided in the left end cover 4 and the right end cover 5 for water cooling and heat dissipation, which can effectively avoid the high temperature of the first oil tank 6 and the second oil tank 7.
[0030] The left end cover 4 and the right end cover 5 are respectively provided with a first sealing ring groove A and a second sealing ring groove B on both sides, and an annular sealing ring is installed in the first sealing ring groove A and the second sealing ring groove B; the left end cover 4 and the right end cover 5 are also provided with a sealing gasket assembly C which is sleeved and installed on both ends of a pair of Roots rotors 2.
[0031] The left end cover 4 and the right end cover 5 are both in the shape of double-hole flanges and are symmetrically installed at the two ends of the pump body 1, wherein the sealing gasket assembly C is installed in the two axial holes in the middle of the left end cover 4 and the right end cover 5, and the first sealing ring groove A and the second sealing ring groove B are arranged on the outer edges of the left end cover 4 and the right end cover 5.
[0032] The pump body 1 is provided with a low-pressure chamber 110 and a high-pressure chamber 120 which are connected to the air inlet 11 and the air outlet 12 respectively. A boosting chamber 10 for a pair of Roots rotors 2 to rotate is provided between the low-pressure chamber 110 and the high-pressure chamber 120. The pair of Roots rotors 2 always keep in contact with the inner wall of the boosting chamber 10, and divide the boosting chamber 10 into two parts which are in contact with the low-pressure chamber 110 and the high-pressure chamber 120.
[0033] The low-pressure chamber 110 and the high-pressure chamber 120 are separated by a pressure relief valve 9, which includes an air relief cover 91 fixed to the pump body 1, a pressure relief cover 92 slidably mounted on the air relief cover 91 and capable of separating the low-pressure chamber 110 and the high-pressure chamber 120, and a pressure-recombining spring 93 for pushing the pressure relief cover 92 to always keep the low-pressure chamber 110 and the high-pressure chamber 120 separated, and when the pressure in the high-pressure chamber 120 is greater than the thrust generated by the pressure-recombining spring 93, the pressure relief cover 92 is pushed open to connect the high-pressure chamber 120 with the low-pressure chamber 110.
[0034] The lower end of the pump body 1 is provided with two spaced-apart strip support seats 13, wherein the air inlet 11 and the air outlet 12 are respectively located on the upper and lower end surfaces of the pump body 1, and the air outlet 12 is located between the two strip support seats 13. The air inlet 11 and the air outlet 12 are provided with flanges for connecting pipelines, and when not in use, the flanges are sealed with a cover plate, and the height of the cover plate is higher than the strip support seat 13. At the same time, the height of the pump body 1 supported by the strip support seat 13 can be used for pipeline installation.
[0035] In summary, when the utility model is working, the driving device 3 drives a pair of Roots rotors 2 to rotate, and continuously pushes the gas in the low-pressure chamber 110 into the high-pressure chamber 120, so as to achieve pressurization. By introducing coolant (such as water) into the first heat dissipation channel 40 and the second heat dissipation channel 50, the heat generated by the friction between the Roots rotors and the left end cover 4 and the right end cover 5 is taken away, so as to achieve heat dissipation of the booster pump, avoid high-temperature damage to the booster pump, and improve the service life of the booster pump. Moreover, after the heat of the left end cover 4 and the right end cover 5 is taken away, the oil in the first oil tank 6 and the second oil tank 7 can be prevented from being heated to a high temperature, which affects the normal operation of the transmission system, reduces the wear of the transmission system, and improves the service life.
[0036] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.
Claims
1. A screw booster pump, comprising: A pump body (1), a pair of Roots rotors (2) rotatably mounted in the pump body (1), and a driving device (3) disposed at one end of the pump body (1) and used to drive the pair of Roots rotors (2) to rotate, wherein the pump body (1) is provided with an air inlet (11) and an air outlet (12) symmetrically located on both sides of the pair of Roots rotors (2), and characterized in that: A first heat dissipation channel (40) and a second heat dissipation channel (50) for circulating coolant are respectively arranged in the left end cover (4) and the right end cover (5) at both ends of the pump body (1), and the end surfaces of both ends of the pair of Roots rotors (2) are respectively in contact with the inner side surfaces of the left end cover (4) and the right end cover (5).
2. A screw booster pump according to claim 1, characterized in that: The first heat dissipation channel (40) and the second heat dissipation channel (50) are respectively integrally injection-molded in the left end cover (4) and the right end cover (5); or the first heat dissipation channel (40) and the second heat dissipation channel (50) are heat dissipation pipes respectively provided in the left end cover (4) and the right end cover (5).
3. A screw booster pump according to claim 1, characterized in that: The first heat dissipation channel (40) and the second heat dissipation channel (50) are respectively bent in a serpentine shape and wound inside the left end cover (4) and the right end cover (5).
4. A screw booster pump according to claim 1, characterized in that: The first heat dissipation channel (40) and the second heat dissipation channel (50) are respectively arranged in a "U" shape in the left end cover (4) and the right end cover (5).
5. A screw booster pump according to any one of claims 1 to 4, characterized in that: A first oil tank (6) and a second oil tank (7) are respectively provided at both ends of the pump body (1), and a connecting pipe (8) is provided between the first oil tank (6) and the second oil tank (7), and the connecting pipe (8) is located in the inner cavity of the pump body (1).
6. A screw booster pump according to claim 5, characterized in that: The driving device (3) is a motor, the output shaft of which is connected to one end of a pair of Roots rotors (2), the other ends of the pair of Roots rotors (2) are provided with mutually meshing gears for linkage, and the two ends of the pair of Roots rotors (2) are respectively located in a first oil tank (6) and a second oil tank (7).
7. A screw booster pump according to claim 5, characterized in that: A first sealing ring groove (A) and a second sealing ring groove (B) are respectively provided on both sides of the left end cover (4) and the right end cover (5), and an annular sealing ring is installed in the first sealing ring groove (A) and the second sealing ring groove (B); and a sealing gasket assembly (C) which is sleeved and installed on both ends of a pair of Roots rotors (2) is also provided in the left end cover (4) and the right end cover (5).
8. A screw booster pump according to claim 7, characterized in that: The left end cover (4) and the right end cover (5) are both in the shape of double-hole flanges and are symmetrically installed at the two ends of the pump body (1), wherein the sealing gasket assembly (C) is installed in two axial holes in the middle of the left end cover (4) and the right end cover (5), and the first sealing ring groove (A) and the second sealing ring groove (B) are arranged on the outer edges of the left end cover (4) and the right end cover (5).
9. A screw booster pump according to any one of claims 1 to 4, characterized in that: The pump body (1) is provided with a low-pressure chamber (110) and a high-pressure chamber (120) which are respectively connected to an air inlet (11) and an air outlet (12); a boost chamber (10) for rotating a pair of Roots rotors (2) is provided between the low-pressure chamber (110) and the high-pressure chamber (120); the pair of Roots rotors (2) always keep in contact with the inner wall of the boost chamber (10), and the boost chamber (10) is divided into two parts which are in contact with the low-pressure chamber (110) and the high-pressure chamber (120).
10. A screw booster pump according to claim 9, characterized in that: A pressure relief valve (9) is also provided between the low-pressure chamber (110) and the high-pressure chamber (120). The pressure relief valve (9) comprises a gas relief cover (91) fixed on the pump body (1), a pressure relief cover (92) slidably mounted on the gas relief cover (91) and capable of separating the low-pressure chamber (110) and the high-pressure chamber (120), and a pressure-compression spring (93) used to push the pressure relief cover (92) to always keep the low-pressure chamber (110) and the high-pressure chamber (120) separated. When the pressure in the high-pressure chamber (120) is greater than the thrust generated by the pressure-compression spring (93), the pressure relief cover (92) is pushed open, so that the high-pressure chamber (120) is connected to the low-pressure chamber (110).