Circulating cooling type roots vacuum pump

Abstract

The invention relates to a circulating cooling type Roots vacuum pump which comprises a pump body with a pump cavity, an air inlet and an air outlet are formed in the pump body, two rotors are rotationally connected in the pump cavity, the circulating cooling type Roots vacuum pump is characterized by further comprising a gas-liquid separation assembly, cooling channels are formed in the two rotors respectively, a water storage cavity and a separation cavity are formed in the pump body, and the water storage cavity is communicated with the separation cavity. The water storage cavity communicates with the separation cavity and the two cooling channels and is adjacent to the pump cavity, the separation cavity communicates with the air inlet and the pump cavity, and the gas-liquid separation assembly is arranged in the separation cavity and used for conducting gas-liquid separation on mixed gas entering the separation cavity and sending liquid into the water storage cavity and sending the gas into the pump cavity. Liquid in the water storage cavity cools the adjacent pump cavity, so that the possibility of high temperature of the pump cavity is reduced; and the cooling channel is formed in the rotor, so that liquid in the water outlet cavity flows into the cooling channel to cool the rotor, and the possibility of seizure and locking phenomena caused by heating in the operation process of the roots vacuum pump is reduced.

Description

Technical Field

[0001] The invention relates to the field of Roots vacuum pumps, in particular to a circulating cooling type Roots vacuum pump. Background Art

[0002] Roots vacuum pump is a vacuum pump without internal compression. Usually, the compression ratio is very low and it needs to be matched with a fore-stage pump. It has a pair of "8"-shaped rotors that rotate synchronously at high speed, installed on a pair of parallel shafts, and driven by a pair of gears with a transmission ratio of 1 to rotate synchronously in opposite directions. There is no contact between the rotors and between the rotors and the pump housing, and the gap is generally 0.1-0.8 mm. The gas is moved by the pushing effect of the synchronous and reverse rotation of the rotors to achieve exhaust. The gas is sucked into the space between the rotor and the pump housing from the air inlet, and then discharged through the exhaust port.

[0003] However, a large amount of heat is generated when the Roots vacuum pump is working. This heat is easily transferred to the Roots rotor and pump casing inside the Roots vacuum pump. The Roots rotor and pump casing are metal parts, which will expand when heated, which can easily lead to friction between the two rotors or between the rotor and the pump casing, resulting in biting and locking, and causing Roots vacuum pump operation failure. Summary of the invention

[0004] In order to reduce the possibility of failure of a Roots vacuum pump due to heat generation, the present application provides a circulating cooling Roots vacuum pump.

[0005] The present application provides a circulating cooling Roots vacuum pump adopts the following technical solution: A circulating cooling Roots vacuum pump comprises a pump body with a pump cavity, wherein the pump body is respectively provided with an air inlet and an air outlet, wherein two rotors are rotatably connected in the pump cavity, and further comprises a gas-liquid separation component, wherein the two rotors are respectively provided with cooling channels, wherein a water storage cavity and a separation cavity are respectively provided on the pump body, wherein the water storage cavity is respectively connected to the separation cavity and the two cooling channels, and wherein the water storage cavity is adjacent to the pump cavity, wherein the separation cavity is respectively connected to the air inlet and the pump cavity, wherein the gas-liquid separation component is arranged in the separation cavity, wherein the gas-liquid separation component is used for performing gas-liquid separation on the mixed gas entering the separation cavity, and sending the liquid into the water storage cavity and the gas into the pump cavity.

[0006] By adopting the above technical scheme, when the Roots vacuum pump is started, the mixed gas is sucked in, and after passing through the separation chamber, the mixed gas is separated into gas and liquid, so that the gas flows into the pump chamber and the liquid flows into the water storage chamber. The adjacent pump chamber is cooled by the liquid in the water storage chamber, thereby reducing the possibility of high temperature in the pump chamber, thereby reducing the possibility of friction between the rotor and the pump casing; and by opening a cooling channel on the rotor, the liquid in the water outlet chamber flows into the cooling channel to cool the rotor, thereby reducing the possibility of friction between the two rotors, thereby reducing the possibility of the Roots vacuum pump being stuck or locked due to heat during operation; and when the liquid in the water storage chamber is insufficient, the liquid in the water storage chamber can be supplemented by slowly adding liquid at the air inlet.

[0007] Preferably, the two rotors are respectively provided with rotating shafts which are coaxially and fixedly connected along their rotating axes, a water inlet channel connected to the cooling channel is provided on the rotating shaft, the axial cross-section of the water inlet channel is annular, and an impeller is provided on the rotating shaft, a swivel is provided on the pump body, the rotating shaft is coaxially and rotatably connected to the swivel, an annular groove is provided on the swivel, the impeller is located in the annular groove, the annular groove respectively connects the water inlet channel and the water storage chamber, and a first valve is provided on the swivel, the first valve only allows liquid to flow from one side of the water storage chamber to one side of the water inlet channel.

[0008] By adopting the above technical scheme, the impeller rotates to absorb water when the rotating shaft rotates, and when the first valve is opened, the liquid flows from one side of the water storage chamber to one side of the water inlet channel and flows into the cooling channel to cool the rotor, thereby reducing the possibility of friction between the two rotors or between the rotor and the pump chamber; and by setting the first valve, the possibility of liquid backflow is reduced, and by setting the swivel, the liquid can still flow into the cooling channel of the rotating shaft when the rotating shaft rotates; and by setting the axial cross-section of the water inlet channel in an annular shape and providing an annular groove on the swivel, the setting of the water inlet pipeline and the swivel does not affect the rotation of the rotating shaft, and the liquid can have sufficient flow length and contact area in the water inlet channel and the cooling channel to exchange heat with the rotor, so that the effect of removing heat is better.

[0009] Preferably, bearings are respectively provided at both ends of the swivel in the axial direction, the inner ring of the bearing is fixedly connected to the rotating shaft, the outer ring of the bearing is fixedly connected to the swivel, a plurality of first annular plates are provided on the swivel, a plurality of second annular plates are provided on the rotating shaft, and the plurality of first annular plates and the plurality of second annular plates are staggered with each other.

[0010] By adopting the above technical solution, by arranging bearings, the friction between the rotating ring and the rotating shaft is reduced, which facilitates the stable rotation of the rotating shaft, and by arranging a plurality of first annular plates and second annular plates that are staggered with each other, a labyrinth seal is achieved, which reduces the possibility of lubricating oil at the bearing entering the annular groove and reduces the possibility of liquid in the annular groove overflowing.

[0011] Preferably, a cold water chamber is further provided on the pump body, the end of the rotating shaft away from the swivel is located in the cold water chamber, and a plurality of second valves are provided on the end of the rotating shaft away from the swivel, the plurality of second valves only allow liquid and gas to flow from one side of the water inlet channel to the other side of the water inlet channel, the plurality of second valves are evenly distributed around the circumference of the rotating shaft, and the cold water chamber is provided with a water inlet pipe connected to the water storage chamber, and the water inlet pipe is provided with a hydraulic valve.

[0012] By adopting the above technical scheme, the water in the cooling channel flows into the cold water chamber for cooling. When the water in the cold water chamber reaches a certain amount, the water in the cold water chamber flows back to the water storage chamber for circulation. The setting of the cold water chamber can also cool the pump chamber, reduce the possibility of high temperature in the pump chamber, and thus reduce the possibility of friction between the rotor and the pump casing. By setting a second valve on the rotating circumferential side, when the rotating shaft rotates, the centrifugal force generated during the rotation causes the liquid in the water inlet channel to be discharged from the water inlet channel. When the liquid is thrown out through the second valve, the liquid is evenly splashed into the cold water chamber, which facilitates the uniform cooling of the pump chamber. At the same time, the second valve can also reduce the possibility of liquid reflux in the cold water chamber.

[0013] Preferably, a motor is provided on the pump body, one end of the output shaft of the motor is coaxially and fixedly connected to one end of any rotating shaft close to the cold water chamber, and a fan is coaxially provided on the output shaft of the motor.

[0014] By adopting the above technical solution, a fan is arranged at one end of the cold water chamber to cool the pump casing while cooling the liquid in the cold water chamber, thereby reducing the temperature of the liquid flowing out of the rotor.

[0015] Preferably, the cold water chamber is also provided with a water outlet channel connected to the outside, and a plurality of abutment rings are arranged in the water outlet channel, and the plurality of abutment rings make the water outlet channel arranged in a stepped shape, and a sliding rod is slidably connected to the water outlet channel along its axial direction, and a plurality of sealing blocks are provided on the sliding rod, and the plurality of sealing blocks correspond to the plurality of abutment rings, and the plurality of sealing blocks are evenly distributed along the axial direction of the sliding rod, and a spring is provided on any of the sealing blocks, and the spring always drives the sealing block to slide toward the side away from the cold water chamber until it abuts against the corresponding abutment ring.

[0016] By adopting the above technical scheme and setting a water outlet channel, when the water level in the cold water chamber is too high, the liquid in the cold water chamber can be discharged through the water outlet channel, thereby reducing the possibility of excessive water circulating in the pump body; when the liquid needs to be discharged, the sliding rod is pushed toward one side of the cold water chamber to separate the sealing block from the corresponding abutment ring, and the water outlet channel can be opened, and the water outlet channel is arranged in a stepped shape to increase the drainage speed; when drainage is not required, a spring drives a plurality of sealing blocks to abut against the corresponding sealing blocks to close the water outlet channel, and by arranging the water outlet channel in a stepped shape, the sealing blocks are pressed by hydraulic pressure to reduce the possibility of the sealing blocks or the sliding rod moving, thereby reducing the possibility of water overflowing from the cold water chamber.

[0017] Preferably, the gas-liquid separation component includes a spiral blade, a gas phase outlet pipe and a liquid separation net, the air inlet is located at the top of the separation chamber, the water storage chamber is located below the separation chamber, the gas phase outlet pipe is fixedly connected in the separation chamber, the upper end of the gas phase outlet pipe is connected to the pump chamber, the spiral blade is coaxial and fixedly connected to the circumferential surface of the gas phase outlet pipe, and the outer circumferential surface of the spiral blade is fixedly connected to the inner wall of the separation chamber, the liquid separation net is fixedly connected in the separation chamber, and the liquid separation net is located below the gas phase outlet pipe.

[0018] By adopting the above technical scheme, when the gas-liquid mixture enters from one side of the air inlet, it flows along the spiral blades. The spiral blades cause the gas-liquid mixture to perform centrifugal swirling motion to generate centrifugal force. The liquid adheres to the side wall of the separation chamber and is gathered together downward due to the action of gravity and flows into the water storage chamber. The gas side is transported upward from the gas phase outlet pipe to the pump chamber, thereby achieving the effect of gas-liquid separation. The liquid separation network is set to buffer the impact of the medium airflow on the accumulated liquid at the bottom of the separator, preventing the possibility of the liquid at the bottom of the separation chamber entering the gas phase outlet pipe with the gas.

[0019] The technical effects of the present invention are mainly reflected in the following aspects: 1. The present invention provides a water storage chamber, a separation chamber and a cooling channel. When the Roots vacuum pump is started, the mixed gas is sucked in. After passing through the separation chamber, the mixed gas is separated into gas and liquid, so that the gas flows into the pump chamber and the liquid flows into the water storage chamber. The adjacent pump chamber is cooled by the liquid in the water storage chamber, thereby reducing the possibility of high temperature in the pump chamber, thereby reducing the possibility of friction between the rotor and the pump housing; and by providing a cooling channel on the rotor, the liquid in the water outlet chamber flows into the cooling channel to cool the rotor, thereby reducing the possibility of friction between the two rotors, thereby reducing the possibility of the Roots vacuum pump being stuck or locked due to heat during operation; and when the liquid in the water storage chamber is insufficient, the liquid in the water storage chamber can be slowly added at the air inlet to replenish the liquid in the water storage chamber; 2. The present invention provides a rotating ring and an annular groove, so that the impeller rotates to absorb water when the rotating shaft rotates. When the first valve is opened, the liquid flows from one side of the water storage chamber to one side of the water inlet channel and flows into the cooling channel to cool the rotor, thereby reducing the possibility of friction between the two rotors or between the rotor and the pump chamber; and by providing the first valve, the possibility of liquid backflow is reduced. By providing the rotating ring, the liquid can still flow into the cooling channel of the rotating shaft when the rotating shaft rotates; and by providing the axial cross-section of the water inlet channel in an annular shape and providing an annular groove on the rotating ring, the water inlet pipeline and the rotating ring do not affect the rotation of the rotating shaft, and the liquid can have sufficient flow length and contact area in the water inlet channel and the cooling channel to exchange heat with the rotor, so that the effect of removing heat is better; 3. The present invention sets a gas-liquid separation component. When the gas-liquid mixture enters from one side of the air inlet, it flows along the spiral blades. The spiral blades cause the gas-liquid mixture to perform centrifugal swirling motion to generate centrifugal force. The liquid adheres to the side wall of the separation chamber and is gathered together downward due to the action of gravity and flows into the water storage chamber. The gas side is transported upward from the gas phase outlet pipe to the pump chamber, thereby achieving the effect of gas-liquid separation. The liquid separation network is set to buffer the impact of the medium airflow on the accumulated liquid at the bottom of the separator, preventing the possibility that the liquid at the bottom of the separation chamber enters the gas phase outlet pipe with the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of the water storage chamber structure of an embodiment of the present application.

[0022] Figure 3 is along Figure 2 Enlarged view of point A in the middle.

[0023] Figure 4 It is a schematic diagram of the rotor structure of an embodiment of the present application.

[0024] Figure 5 It is a schematic diagram of the cold water chamber structure of an embodiment of the present application.

[0025] Figure 6 It is a schematic diagram of the water outlet channel structure of an embodiment of the present application.

[0026] Figure 7 is along Figure 6 Enlarged view of point B in the middle.

[0027] Figure 8 It is a schematic diagram of the gear structure of an embodiment of the present application.

[0028] Fig. 9 It is a schematic diagram of the swivel structure of an embodiment of the present application.

[0029] Fig.10 is along Fig. 9 Enlarged view of point C in the middle.

[0030] Explanation of the accompanying drawings: 1. Pump body; 11. Pump chamber; 12. Air inlet; 13. Air outlet; 14. Water storage chamber; 15. Separation chamber; 16. Cold water chamber; 161. Water inlet pipe; 162. Water outlet channel; 163. Abutment ring; 164. Sealing block; 165. Sliding rod; 166. Hemisphere; 167. Spring; 2. Rotor; 21. Gear; 22. Cooling channel; 23. Rotating shaft; 231. Second valve; 232. Second annular plate; 24. Water inlet channel; 25. Impeller; 3. Motor; 31. Fan; 4. Gas-liquid separation component; 41. Spiral blade; 42. Gas phase outlet pipe; 43. Liquid separation net; 5. Rotating ring; 51. Annular groove; 52. Bearing; 53. First annular plate; 54. First valve. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-Figure 10 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0032] The embodiment of the present application discloses a circulating cooling Roots vacuum pump.

[0033] Reference Figure 1 , Figure 5 and Figure 8 A circulating cooling Roots vacuum pump comprises a pump body 1 with a pump chamber 11. An air inlet 12 and an air outlet 13 are respectively opened on the pump body 1. Two rotors 2 are rotatably connected in the pump chamber 11. Gears 21 are coaxially and fixedly connected to the two rotors 2, and the two gears 21 are meshed with each other. A motor 3 is fixedly connected to the pump body 1, and the motor 3 is used to drive any rotor 2 to rotate.

[0034] Reference Figure 2 and Figure 4 , also includes a gas-liquid separation component 4, the two rotors 2 are respectively provided with cooling channels 22, the pump body 1 is provided with a water storage chamber 14 and a separation chamber 15, the water storage chamber 14 is respectively connected to the separation chamber 15 and the two cooling channels 22, and the water storage chamber 14 is adjacent to the pump chamber 11, the separation chamber 15 is respectively connected to the air inlet 12 and the pump chamber 11, the gas-liquid separation component 4 is arranged in the separation chamber 15, the gas-liquid separation component 4 is used for gas-liquid separation of the mixed gas entering the separation chamber 15, and sending the liquid into the water storage chamber 14 and the gas into the pump chamber 11.

[0035] Reference Figure 4 and Fig. 9The two rotors 2 are coaxially and fixedly connected with a rotating shaft 23 along the rotating shaft 23 line, respectively. The two gears 21 are coaxially and fixedly connected to the two rotating shafts 23, respectively. The two rotating shafts 23 are provided with a water inlet channel 24 connected with the cooling channel 22. The axial cross-section of the water inlet channel 24 is annular, and the two rotating shafts 23 are fixedly connected with an impeller 25. A swivel 5 is fixedly connected to the pump body 1. The rotating shaft 23 is coaxially and rotatably connected to the swivel 5. An annular groove 51 is provided on the swivel 5. The impeller 25 is located in the annular groove 51. The annular groove 51 connects the water inlet channel 24 and the water storage chamber 14, respectively. A first valve 54 is fixedly connected to the swivel 5. The first valve 54 only allows liquid to flow from one side of the water storage chamber 14 to one side of the water inlet channel 24.

[0036] Reference Figure 5 , Figure 6 and Figure 7 A cold water chamber 16 is also provided on the pump body 1. The end of the rotating shaft 23 away from the swivel 5 is located in the cold water chamber 16, and the end of the rotating shaft 23 away from the swivel 5 is fixedly connected to a plurality of second valves 231. The plurality of second valves 231 only allow liquid and gas to flow from one side of the water inlet channel 24 to the other side of the water inlet channel 24. The plurality of second valves 231 are evenly distributed around the circumference of the rotating shaft 23. The cold water chamber 16 is fixedly connected to a water inlet pipe 161 connected to the water storage chamber 14, and the water inlet pipe 161 is fixedly connected to a hydraulic valve. The cold water chamber 16 is also provided with a water outlet channel 162 connected to the outside, and the circumferential cross-section of the water outlet channel 162 is arranged in a stepped shape. The cold water chamber 16 is also provided with a water outlet channel 162 connected to the outside, and a plurality of abutment rings 163 are fixedly connected in the water outlet channel 162, and the plurality of abutment rings 163 make the water outlet channel 162 arranged in a stepped shape. A sliding rod 165 is slidably connected to the water outlet channel 162 along its axial direction, and a plurality of sealing blocks 164 are fixedly connected to the sliding rod 165, and the plurality of sealing blocks 164 correspond to the plurality of abutment rings 163, and the plurality of sealing blocks 164 are respectively arranged along the axial direction of the water outlet channel 162. The axial direction of the sliding rod 165 is evenly distributed, and a spring 167 is fixedly connected to any sealing block 164. The two ends of the spring 167 respectively abut against the inner wall of the water outlet channel 162 and the sealing block 164. The spring 167 always drives the sealing block 164 to slide toward the side away from the cold water chamber 16 until it abuts against the corresponding abutment ring 163, and the end of the sliding rod 165 away from the cold water chamber 16 is fixedly connected to a hemisphere 166. When the sealing block 164 abuts against the abutment ring 163, the hemisphere 166 abuts against the outlet of the water outlet channel 162 away from the cold water chamber 16.

[0037] Reference Figure 5One end of the output shaft of the motor 3 is coaxially and fixedly connected to one end of any rotating shaft 23 close to the cold water chamber 16, and a fan 31 is coaxially and fixedly connected to the output shaft of the motor 3. By arranging the fan 31 at one end of the cold water chamber 16, the pump housing is cooled while the liquid in the cold water chamber 16 is cooled, thereby reducing the temperature of the liquid flowing out of the rotor 2. The cooling speed of the liquid in the cold water chamber 16 can be increased, and the possibility of high temperature of the circulating liquid can be reduced.

[0038] Reference Figure 2 and Fig. 9 When the Roots vacuum pump is started, the mixed gas is sucked in, and after passing through the separation chamber 15, the mixed gas is separated into gas and liquid, so that the gas flows into the pump chamber 11 and the liquid flows into the water storage chamber 14. The adjacent pump chamber 11 is cooled by the liquid in the water storage chamber 14, thereby reducing the possibility of high temperature in the pump chamber 11, thereby reducing the possibility of friction between the rotor 2 and the pump housing; and by opening a cooling channel 22 on the rotor 2, the impeller 25 rotates when the rotating shaft 23 rotates to absorb water. When the first valve 54 is opened, the liquid flows from one side of the water storage chamber 14 to one side of the water inlet channel 24 and flows into the cooling channel 22 to cool the rotor 2, thereby reducing the possibility of friction between the two rotors 2, thereby reducing the possibility of the Roots vacuum pump being stuck or locked due to heat during operation; and when the liquid in the water storage chamber 14 is insufficient, the liquid in the water storage chamber 14 can also be supplemented by slowly adding liquid at the air inlet 12.

[0039] Reference Figure 2 and Fig. 9 By setting the first valve 54, the possibility of liquid backflow is reduced. By setting the swivel 5, the liquid can still flow into the cooling channel 22 of the rotating shaft 23 when the rotating shaft 23 rotates; and by making the axial cross-section of the water inlet channel 24 annular and providing an annular groove 51 on the swivel 5, the water inlet pipe 161 and the setting of the swivel 5 do not affect the rotation of the rotating shaft 23, and the liquid can have sufficient flow length and contact area in the water inlet channel 24 and the cooling channel 22 to exchange heat with the rotor 2, so that the effect of removing heat is better.

[0040] Reference Figure 5 and Fig. 9, after the water in the cooling channel 22 flows into the cold water chamber 16 for cooling, when the water in the cold water chamber 16 reaches a certain amount, the water in the cold water chamber 16 flows back to the water storage chamber 14 for circulation; and the setting of the cold water chamber 16 can also cool the pump chamber 11, reduce the possibility of high temperature in the pump chamber 11, and thus reduce the possibility of friction between the rotor 2 and the pump housing; and by arranging the second valve 231 on the rotating circumferential side, when the rotating shaft 23 rotates, the liquid in the water inlet channel 24 is discharged from the water inlet channel 24 by the centrifugal force generated during the rotation, and when the liquid is thrown out through the second valve 231, the liquid is evenly splashed into the cold water chamber 16, so as to facilitate the uniform cooling of the pump chamber 11; at the same time, the second valve 231 can also reduce the possibility of liquid reflux in the cold water chamber 16.

[0041] Reference Figure 6 and Figure 7 By setting the water outlet channel 162, when the water level in the cold water chamber 16 is too high, the liquid in the cold water chamber 16 can be discharged through the water outlet channel 162, thereby reducing the possibility of excessive water circulating in the pump body 1; when the liquid needs to be discharged, force is applied to the hemispherical body 166 to push the sliding rod 165 toward one side of the cold water chamber 16, so that the sealing block 164 is separated from the corresponding abutment ring 163, and the water outlet channel 162 is opened, and the water outlet channel 162 is arranged in a stepped shape to increase the drainage speed; when no drainage is required, the spring 167 drives a plurality of sealing blocks 164 to abut against the corresponding sealing blocks 164, closing the water outlet channel 162, and by arranging the water outlet channel 162 in a stepped shape, the sealing block 164 is pressed by hydraulic pressure, thereby reducing the possibility of the sealing block 164 or the sliding rod 165 moving, thereby reducing the possibility of water overflowing from the cold water chamber 16.

[0042] Reference Fig. 9 and Fig.10 , bearings 52 are respectively installed at both ends of the swivel 5 in the axial direction, the inner ring of the bearing 52 is fixedly connected to the rotating shaft 23, the outer ring of the bearing 52 is fixedly connected to the swivel 5, a plurality of first annular plates 53 are coaxially and fixedly connected to the swivel 5, the plurality of first annular plates 53 are evenly distributed along the axial direction of the swivel 5, a plurality of second annular plates 232 are coaxially and fixedly connected to the rotating shaft 23, the plurality of second annular plates 232 are evenly distributed along the axial direction of the swivel 5, and the plurality of first annular plates 53 and the plurality of second annular plates 232 are staggered. By setting the bearing 52, the friction between the swivel 5 and the rotating shaft 23 is reduced, and the stable rotation of the rotating shaft 23 is facilitated, and by setting the plurality of first annular plates 53 and second annular plates 232 staggered with each other, the effect of labyrinth seal is played, that is, the possibility of lubricating oil at the bearing 52 entering the annular groove 51 is reduced, and the possibility of liquid in the annular groove 51 overflowing is reduced.

[0043] Reference Figure 2 and Figure 3The gas-liquid separation component 4 includes a spiral blade 41, a gas phase outlet pipe 42 and a liquid separation net 43. The air inlet 12 is located at the top of the separation chamber 15, the water storage chamber 14 is located below the separation chamber 15, the gas phase outlet pipe 42 is fixedly connected in the separation chamber 15, the upper end of the gas phase outlet pipe 42 is connected to the pump chamber 11, the spiral blade 41 is coaxially and fixedly connected to the circumferential surface of the gas phase outlet pipe 42, and the outer circumferential surface of the spiral blade 41 is fixedly connected to the inner wall of the separation chamber 15, the liquid separation net 43 is fixedly connected in the separation chamber 15, and the liquid separation net 43 is located below the gas phase outlet pipe 42. When the gas-liquid mixture enters from the side of the air inlet 12, it flows along the spiral blades 41. The spiral blades 41 cause the gas-liquid mixture to perform centrifugal swirling motion to generate centrifugal force. The liquid adheres to the side wall of the separation chamber 15. Due to the effect of gravity, it gathers together downward and flows into the water storage chamber 14. The gas side is transported upward from the gas phase outlet pipe 42 to the pump chamber 11, thereby achieving the effect of gas-liquid separation. The liquid separation network 43 is set to buffer the impact of the medium airflow on the accumulated liquid at the bottom of the separation chamber 15, and prevent the possibility that the liquid at the bottom of the separation chamber 15 enters the gas phase outlet pipe 42 with the gas.

[0044] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A circulating cooling Roots vacuum pump, comprising a pump body (1) with a pump chamber (11), the pump body (1) being provided with an air inlet (12) and an air outlet (13), two rotors (2) being rotatably connected in the pump chamber (11), characterized in that: The invention also comprises a gas-liquid separation component (4), wherein the two rotors (2) are respectively provided with cooling channels (22), the pump body (1) is provided with a water storage chamber (14) and a separation chamber (15), the water storage chamber (14) is respectively connected to the separation chamber (15) and the two cooling channels (22), and the water storage chamber (14) is adjacent to the pump chamber (11), the separation chamber (15) is respectively connected to the air inlet (12) and the pump chamber (11), the gas-liquid separation component (4) is arranged in the separation chamber (15), and the gas-liquid separation component (4) is used for performing gas-liquid separation on the mixed gas entering the separation chamber (15), and sending the liquid into the water storage chamber (14) and the gas into the pump chamber (11).

2. A circulating cooling Roots vacuum pump according to claim 1, characterized in that: The two rotors (2) are coaxially and fixedly connected with a rotating shaft (23) along the rotating shaft (23) line, respectively; a water inlet channel (24) connected to the cooling channel (22) is provided on the rotating shaft (23); the axial cross section of the water inlet channel (24) is annular, and an impeller (25) is provided on the rotating shaft (23); a rotating ring (5) is provided on the pump body (1); the rotating shaft (23) is coaxially and rotatably connected to the rotating ring (5); an annular groove (51) is provided on the rotating ring (5); the impeller (25) is located in the annular groove (51); the annular groove (51) is connected to the water inlet channel (24) and the water storage chamber (14) respectively; a first valve (54) is provided on the rotating ring (5); the first valve (54) only allows liquid to flow from one side of the water storage chamber (14) to one side of the water inlet channel (24).

3. A circulating cooling Roots vacuum pump according to claim 2, characterized in that: Bearings (52) are respectively provided at both ends of the rotating ring (5) in the axial direction, the inner ring of the bearing (52) is fixedly connected to the rotating shaft (23), and the outer ring of the bearing (52) is fixedly connected to the rotating ring (5). The rotating ring (5) is provided with a plurality of first annular sheets (53), and the rotating shaft (23) is provided with a plurality of second annular sheets (232), and the plurality of first annular sheets (53) and the plurality of second annular sheets (232) are arranged alternately.

4. A circulating cooling Roots vacuum pump according to claim 2, characterized in that: The pump body (1) is also provided with a cold water chamber (16), and the end of the rotating shaft (23) away from the rotating ring (5) is located in the cold water chamber (16), and the end of the rotating shaft (23) away from the rotating ring (5) is provided with a plurality of second valves (231), and the plurality of second valves (231) only allow liquid and gas to flow from one side of the water inlet channel (24) to the other side of the water inlet channel (24), and the plurality of second valves (231) are evenly distributed around the circumference of the rotating shaft (23), and the cold water chamber (16) is provided with a water inlet pipe (161) connected with the water storage chamber (14), and the water inlet pipe (161) is provided with a hydraulic valve.

5. A circulating cooling Roots vacuum pump according to claim 4, characterized in that: The pump body (1) is provided with a motor (3), one end of the output shaft of the motor (3) is coaxially and fixedly connected to one end of any rotating shaft (23) close to the cold water chamber (16), and a fan (31) is coaxially provided on the output shaft of the motor (3).

6. A circulating cooling Roots vacuum pump according to claim 4, characterized in that: The cold water chamber (16) is also provided with a water outlet channel (162) connected to the outside, and a plurality of abutment rings (163) are arranged in the water outlet channel (162). The plurality of abutment rings (163) make the water outlet channel (162) arranged in a stepped shape. A sliding rod (165) is slidably connected to the water outlet channel (162) along its axial direction. The sliding rod (165) is provided with a plurality of sealing blocks (164). The plurality of sealing blocks (164) correspond to the plurality of abutment rings (163). The plurality of sealing blocks (164) are evenly distributed along the axial direction of the sliding rod (165). A spring (167) is provided on any of the sealing blocks (164). The spring (167) always drives the sealing block (164) to slide toward a side away from the cold water chamber (16) until it abuts against the corresponding abutment ring (163).

7. A circulating cooling Roots vacuum pump according to claim 1, characterized in that: The gas-liquid separation component (4) comprises a spiral blade (41), a gas phase outlet pipe (42) and a liquid separation net (43); the gas inlet (12) is located at the top of the separation chamber (15); the water storage chamber (14) is located below the separation chamber (15); the gas phase outlet pipe (42) is fixedly connected to the separation chamber (15); the upper end of the gas phase outlet pipe (42) is connected to the pump chamber (11); the spiral blade (41) is coaxially and fixedly connected to the circumferential surface of the gas phase outlet pipe (42); and the outer circumferential surface of the spiral blade (41) is fixedly connected to the inner wall of the separation chamber (15); the liquid separation net (43) is fixedly connected to the separation chamber (15); and the liquid separation net (43) is located below the gas phase outlet pipe (42).

Images