A screw air compressor with a seal compensation function

Abstract

The present invention discloses a screw air compressor with a sealing compensation function, comprising: a housing, inside which a rotor is installed, both ends of the rotor are fixedly connected with a rotating shaft, a rotating shaft groove is formed inside the housing, and the rotor is rotatably connected inside the rotating shaft groove through the rotating shaft; a seal, the seal is arranged outside one of the rotating shafts, the seal is provided with two sealing rings, and the two sealing rings are arranged inside the rotating shaft groove; a driving mechanism, located outside the housing, for alternately pushing the two sealing rings so that the two sealing rings perform alternate sealing. By setting the driving mechanism in the present invention, since the sealing rings work alternately, when one sealing ring fits the rotating shaft for sealing, the other sealing ring is in a recovery state. This design reduces the continuous friction between the sealing ring and the rotating shaft, prolongs the service life of the sealing ring, and improves the overall sealing performance at the same time.

Description

Technical Field

[0001] The present invention relates to the field of screw air compressors, and particularly to a screw air compressor with a seal compensation function. Background Art

[0002] During the use of a screw air compressor, the rotor rotates inside the housing through a rotating shaft, and the contact part between the rotating shaft and the housing is sealed by a sealing ring. However, the sealing ring is prone to significant wear during long-term contact and friction with the rotating shaft, resulting in an imbalance in the sealing effect of the sealing ring, and further affecting the overall sealing performance of the device. For this reason, we provide a screw air compressor with a seal compensation function to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a screw air compressor with a seal compensation function to solve the problem that the sealing ring is prone to significant wear during long-term contact and friction with the rotating shaft, resulting in an imbalance in the sealing effect of the sealing ring, and further affecting the overall sealing performance of the device.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A screw air compressor with a seal compensation function, comprising: a housing, inside which a rotor is installed, both ends of the rotor are fixedly connected with a rotating shaft, a rotating shaft groove is opened inside the housing, and the rotor is rotationally connected inside the rotating shaft groove through the rotating shaft; a sealing member, which is arranged outside one of the rotating shafts, the sealing member is provided with two sealing rings, and the two sealing rings are arranged inside the rotating shaft groove; a driving mechanism, located outside the housing, for alternately pushing the two sealing rings so that the two sealing rings perform alternate sealing.

[0005] As a further solution of the present invention: It further includes a purging assistor, located inside the housing, for cleaning the debris inside the sealing ring;

[0006] As a further solution of the present invention: It further includes an auxiliary component, located inside the housing, for cooperating with the purging assistor to clean the impurities in the gap between the sealing ring and the rotating shaft.

[0007] As a further solution of the present invention: The driving mechanism includes a fixed frame fixedly connected to the outer wall of the housing. A servo motor is fixedly connected to the side wall of the fixed frame. The execution end of the servo motor is fixedly connected to a spur gear. A leakage sensor is installed inside the rotating shaft groove. The interior of the fixed frame is respectively provided with a first chamber and a second chamber. Two fixed rods are slidably connected inside the fixed frame, and one of the fixed rods extends into the first chamber, and the other fixed rod extends into the second chamber. One ends of the two fixed rods are respectively fixedly connected to a first rack and a second rack, and both sides of the spur gear are meshed with the first rack and the second rack respectively.

[0008] As a further solution of the present invention: The driving mechanism further includes electric telescopic rods respectively installed inside the two fixed rods. The execution ends of the two electric telescopic rods respectively penetrate to the outside of the fixed rods and are fixedly connected to piston plates, and the two piston plates are respectively installed inside the first chamber and the second chamber. Two sliders are respectively fixedly connected to the outer walls of the first rack and the second rack. A chute matching the slider is opened inside the fixed frame. The first rack and the second rack are respectively slidably connected inside the chute through the sliders. A communication component for communicating the first chamber and the second chamber is arranged inside the housing.

[0009] As a further solution of the present invention: The communication component includes a first communication groove and a second communication groove opened inside the housing. Air guide grooves are respectively opened inside the first chamber and the second chamber. The first communication groove and the second communication groove are respectively communicated with the first chamber and the second chamber through the air guide grooves. An upper air groove and a lower air groove are opened inside the rotating shaft groove. The upper air groove and the lower air groove are respectively communicated with the first communication groove and the second communication groove. The upper air groove and the lower air groove are separated by a partition plate, and the partition plate is fixedly connected to the inside of the housing. Two sealing rings are respectively installed inside the upper air groove and the lower air groove. The initial state of one of the sealing rings is in close fit with the rotating shaft, and the other sealing ring is separated from the rotating shaft.

[0010] As a further solution of the present invention: The purging assistor includes a connecting rod fixedly connected to the outer wall of one of the fixed rods. One end of the connecting rod penetrates to the outside of the fixed frame and extends into the interior of the housing and is fixedly connected to an auxiliary piston rod. An auxiliary chamber is provided inside the housing. The auxiliary piston rod is slidably connected to the interior of the auxiliary chamber through the connecting rod. An auxiliary groove is provided inside the housing. The auxiliary chamber communicates with the auxiliary groove. A third communication groove is provided inside the partition. A fixed cover is fixedly connected above the rotating shaft inside the housing. A one-way valve is fixedly connected to the top of the fixed cover. A flow pipe is installed at the output end of the one-way valve.

[0011] As a further solution of the present invention: The auxiliary assembly includes a plurality of blocking grooves provided inside the auxiliary chamber. An inclined groove is provided inside the auxiliary chamber. The plurality of blocking grooves communicate with the inclined groove. A first collecting hopper and a second collecting hopper are threadedly connected to the outside of the housing. A connecting pipe is installed at the bottom of the inclined groove. One end of the connecting pipe penetrates to the outside of the second communication groove and abuts against the feed port of the first collecting hopper. One end of the flow pipe penetrates to the inside of the housing and abuts against the feed port of the second collecting hopper.

[0012] As a further solution of the present invention: The upper half of the first collecting hopper and the second collecting hopper is composed of a filter sleeve, and the outer wall of the lower half is provided with threads, and a thread groove matching the first collecting hopper and the second collecting hopper is provided inside the housing.

[0013] As a further solution of the present invention: The auxiliary assembly further includes a return groove provided inside the housing. A first annular air outlet is provided inside the rotating shaft groove. The return groove communicates with the first annular air outlet. A sealing film is installed inside the return groove. The sealing film is composed of four rotatable elastic sealing rubbers, and the four elastic sealing rubbers are mutually attached.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. By setting the driving mechanism, since the sealing rings work alternately, when one sealing ring fits the rotating shaft for sealing, the other sealing ring is in a recovery state. Through the alternating sealing and dynamic compensation of the sealing rings, the sealing effect can be ensured without being affected. This design reduces the continuous friction between the sealing rings and the rotating shaft, extends the service life of the sealing rings, and improves the overall sealing performance at the same time;

[0016] 2. By setting up the cooperation of the purging auxiliary and the auxiliary components, when the second rack works under negative pressure or positive pressure inside the second chamber, the heat and impurities between the rotating shaft and the sealing ring can be sucked or blown into the first collecting hopper and the second collecting hopper for collection, so as to ensure that there is no foreign matter between the rotating shaft and the sealing ring after re-sealing, thereby reducing the wear degree between the rotating shaft and the sealing ring, and further improving the overall sealing effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a sectional view of the housing of the present invention;

[0019] Figure 3 is a schematic partial structural diagram of the housing of the present invention;

[0020] Figure 4 is of the present invention Figure 3 the enlarged view at A in;

[0021] Figure 5 is of the present invention Figure 3 the enlarged view at B in;

[0022] Figure 6 is a schematic inner structure diagram of the rotating shaft groove of the present invention;

[0023] Figure 7 is a sectional view of the fixing rod of the present invention;

[0024] Figure 8 is a schematic fitting diagram of the sealing ring of the present invention;

[0025] Figure 9 is a schematic partial structural diagram of the housing of the present invention;

[0026] Figure 10 is a schematic structure diagram of the sealing film of the present invention.

[0027] In the figure: 1. housing; 2. fixed frame; 3. rotor; 4. rotating shaft; 5. first chamber; 6. second chamber; 7. first communication groove; 8. upper air groove; 9. sealing ring; 10. second communication groove; 11. lower air groove; 12. partition board; 13. first rack; 14. rotating shaft groove; 15. auxiliary groove; 16. return groove; 17. first annular air outlet; 18. flow pipe; 19. air leakage sensor; 20. fixed cover; 21. one-way valve; 22. third communication groove; 23. second annular air outlet; 24. auxiliary chamber; 25. auxiliary piston rod; 26. blocking groove; 27. inclined groove; 28. fixed rod; 29. connecting pipe; 30. first collecting hopper; 31. second collecting hopper; 32. sealing film; 33. servo motor; 34. spur gear; 35. second rack; 36. slider; 37. sliding groove; 38. electric telescopic rod; 39. piston plate; 40. connecting rod. Detailed implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The embodiments of the present invention will be described below according to the overall structure of the present invention.

[0030] Embodiment 1

[0031] Please refer to Figures 1 to 10, this embodiment provides a screw air compressor with a sealing compensation function, including: a housing 1, two rotors 3 are installed inside the housing 1, both ends of the rotor 3 are fixedly connected with a rotating shaft 4, a plurality of rotating shaft grooves 14 are opened inside the housing 1, and the rotor 3 is rotatably connected inside the rotating shaft groove 14 through the rotating shaft 4; a sealing member, a set of sealing members is arranged on the outside of each rotating shaft 4, each set of sealing members is provided with two sealing rings 9, and both sealing rings 9 are arranged inside the rotating shaft groove 14; a driving mechanism, located outside the housing 1, is used to push the sealing ring 9 so that the two sealing rings 9 perform alternate sealing. The driving mechanism includes a fixed frame 2 fixedly connected to the outer wall of the housing 1, a servo motor 33 is fixedly connected to the side wall of the fixed frame 2, the execution end of the servo motor 33 is fixedly connected with a spur gear 34, a leakage sensor 19 is installed inside the rotating shaft groove 14, a first chamber 5 and a second chamber 6 are respectively opened inside the fixed frame 2, two fixed rods 28 are slidably connected inside the fixed frame 2, and one fixed rod 28 extends into the first chamber 5, and the other fixed rod 28 extends into the second chamber 6. One ends of the two fixed rods 28 are respectively fixedly connected with a first rack 13 and a second rack 35, and both sides of the spur gear 34 are meshed with the first rack 13 and the second rack 35 respectively. The driving mechanism further includes electric telescopic rods 38 respectively installed inside the two fixed rods 28, the execution ends of the two electric telescopic rods 38 respectively penetrate to the outside of the fixed rod 28 and are fixedly connected with a piston plate 39, and the two piston plates 39 are respectively installed inside the first chamber 5 and the second chamber 6. Sliders 36 are respectively fixedly connected to the outer walls of the first rack 13 and the second rack 35, a chute 37 matching the slider 36 is opened inside the fixed frame 2, and the first rack 13 and the second rack 35 are respectively slidably connected inside the chute 37 through the slider 36. A communication component for communicating the first chamber 5 and the second chamber 6 is arranged inside the housing 1. The communication component includes a first communication groove 7 and a second communication groove 10 opened inside the housing 1. Air guide grooves are respectively opened inside the first chamber 5 and the second chamber 6, and the first communication groove 7 and the second communication groove 10 are respectively communicated with the first chamber 5 and the second chamber 6 through the air guide grooves. An upper air groove 8 and a lower air groove 11 are opened inside the rotating shaft groove 14, the upper air groove 8 and the lower air groove 11 are respectively communicated with the first communication groove 7 and the second communication groove 10, the upper air groove 8 and the lower air groove 11 are separated by a partition plate 12, and the partition plate 12 is fixedly connected to the inside of the housing 1. Every two sealing rings 9 are respectively installed inside the upper air groove 8 and the lower air groove 11. The initial state of one of the sealing rings 9 is in close fit with the rotating shaft 4, and the other sealing ring 9 is loosened from the rotating shaft 4 and no longer clings to the rotating shaft 4.

[0032] When the screw air compressor is operating, the PLC controller intermittently starts the servo motor 33. The output end of the servo motor 33 drives the spur gear 34 to perform intermittent reciprocating rotation. When the spur gear 34 rotates forward, it drives the first rack 13 to drive a fixed rod 28 to move into the first chamber 5, and at the same time drives the second rack 35 to move out of the second chamber 6. The first rack 13 pushes the piston plate 39 to push the gas inside the first chamber 5 into the first communication groove 7. The second rack 35 evacuates the inside of the second communication groove 10 through the piston plate 39, so that the pressure inside the upper air groove 8 increases, enabling the sealing ring 9 installed inside it to closely fit the outer wall of the rotating shaft 4. At the same time, the pressure inside the lower air groove 11 decreases, causing the sealing ring 9 inside it to return to a relaxed state and no longer closely adhere to the rotating shaft 4. By the reciprocating rotation of the output end of the servo motor 33, the two sealing rings 9 can be alternately sealed on the outer wall of the rotating shaft 4.

[0033] Since the sealing rings 9 work alternately, when one sealing ring 9 fits the rotating shaft 4 for sealing, the other sealing ring 9 is in a recovery state and gradually moves away from the rotating shaft 4. This design reduces the continuous friction between the sealing ring 9 and the rotating shaft 4, extends the service life of the sealing ring 9, and improves the overall sealing performance. In addition, by intermittently starting the servo motor 33 through the PLC controller, the alternate sealing time of the sealing ring 9 can be precisely controlled, further optimizing the sealing effect. Strong adaptability: This design can adapt to the sealing requirements under different working conditions. For example, at the initial stage of the operation of the screw air compressor, the wear degree of the rotating shaft 4 is small, and at this time the fitting degree of the sealing ring 9 may be relatively high; as the operation time increases, the wear degree of the rotating shaft 4 gradually increases. At this time, through the alternate sealing and dynamic compensation of the sealing ring 9, the sealing effect can be ensured not to be affected. Since the sealing rings 9 work alternately, when one sealing ring 9 fails due to wear or aging, the other sealing ring 9 can immediately take over its sealing task, greatly reducing the risk of leakage. This design not only improves the operating efficiency of the screw air compressor but also ensures the safety of the working environment.

[0034] When the servo motor 33 is operating, the electrical signal sent by the air leakage sensor 19 during operation reaches the PLC controller. At this time, the PLC controller does not control the electric telescopic rod 38 to start; when the servo motor 33 is not operating, the air leakage sensor 19 operates to detect air leakage, detecting whether there is air leakage in the gap between the rotating shaft groove 14 and the rotating shaft 4. If there is air leakage, the PLC controller controls the electric telescopic rod 38 inside the first chamber 5 or the second chamber 6 where the air leakage occurs to start, thereby driving the piston plate 39 to move horizontally to pressurize the outer wall of the sealing ring 9 at the position where the elastic imbalance occurs, until the sealing ring 9 forms a seal again, compensating for the seal, and thus improving the overall sealing performance of the device.

[0035] An alarm light for alarm can be installed on the outer wall of the housing 1. Moreover, the electric telescopic rod 38 is started intermittently under the control of the PLC controller, and the output end of the electric telescopic rod 38 has three sections of stroke. When the air leakage sensor 19 still detects air leakage in the device after the output end of the electric telescopic rod 38 extends to the maximum distance, the PLC controller makes the alarm light operate to remind the staff that the device has air leakage.

[0036] Embodiment 2

[0037] The purging auxiliary device is located inside the housing 1 and is used to clean the debris inside the sealing ring 9. The auxiliary component is located inside the housing 1 and is used to cooperate with the purging auxiliary device to clean the impurities in the gap between the sealing ring 9 and the rotating shaft 4. The purging auxiliary device includes a connecting rod 40 fixedly connected to the outer wall of one of the fixed rods 28. One end of the connecting rod 40 penetrates to the outside of the fixed frame 2 and extends into the housing 1 and is fixedly connected with an auxiliary piston rod 25. An auxiliary chamber 24 is opened inside the housing 1. The auxiliary piston rod 25 is slidably connected inside the auxiliary chamber 24 through the connecting rod 40. An auxiliary groove 15 is opened inside the housing 1. The auxiliary chamber 24 is communicated with the auxiliary groove 15. A third communication groove 22 is opened inside the partition plate 12. A fixed cover 20 is fixedly connected above the rotating shaft 4 inside the housing 1. A one-way valve 21 is fixedly connected to the top of the fixed cover 20. A flow pipe 18 is installed at the output end of the one-way valve 21. The auxiliary component includes a plurality of blocking grooves 26 opened inside the auxiliary chamber 24. An inclined groove 27 is opened inside the auxiliary chamber 24. The plurality of blocking grooves 26 communicate with the inclined groove 27. The first collecting hopper 30 and the second collecting hopper 31 are threadedly connected to the outside of the housing 1. A connecting pipe 29 is installed at the bottom of the inclined groove 27. One end of the connecting pipe 29 penetrates to the outside of the second communication groove 10 and abuts against the feed inlet of the first collecting hopper 30. One end of the flow pipe 18 penetrates to the inside of the housing 1 and abuts against the feed inlet of the second collecting hopper 31. The upper half of the first collecting hopper 30 and the second collecting hopper 31 are composed of filter sleeves, and the outer walls of the lower halves are provided with threads. Moreover, threaded grooves matching the first collecting hopper 30 and the second collecting hopper 31 are opened inside the housing 1. The auxiliary component further includes a return groove 16 opened inside the housing 1. A first annular air outlet 17 is opened inside the rotating shaft groove 14. The first annular air outlet 17 is arranged below the lower sealing ring 9. The return groove 16 is communicated with the first annular air outlet 17. A sealing film 32 is installed inside the return groove 16. The sealing film 32 is composed of four rotatable elastic sealing rubbers, and the four elastic sealing rubbers are mutually attached.

[0038] A limiting groove matching the connecting rod 40 is provided inside the fixed frame 2. When the second rack 35 performs a pressurization operation inside the second chamber 6, the second rack 35 drives the connecting rod 40 to push the auxiliary piston rod 25 to move, thereby driving the auxiliary piston rod 25 to slide inside the auxiliary chamber 24, and conveying the gas from inside the auxiliary groove 15 to the third communication groove 22. At this time, the sealing ring 9 is loosened from the rotating shaft 4 and no longer clings to the rotating shaft 4. The gas is discharged from the third communication groove 22 through the second annular air outlet 23, blowing away the heat generated inside the sealing ring 9 that is gradually separated from the rotating shaft 4 and the debris generated by the wear of the rotating shaft 4, dissipating heat and cleaning between the rotating shaft 4 and the sealing ring 9. The heat-dissipating gas enters the fixed cover 20 from inside the rotating shaft groove 14, then enters the inside of the flow pipe 18 from the output port of the one-way valve 21, and enters the second collecting hopper 31, reducing excessive wear of the sealing ring 9 caused by heat between the rotating shaft 4 and the sealing ring 9 and reducing the service life. The pressurized gas blows away the heat generated between the rotating shaft 4 and the sealing ring 9, effectively reducing the temperature in this area. This heat-dissipating mechanism significantly reduces the material aging and wear of the sealing ring 9 caused by high temperature, further extending the service life of the sealing ring 9. By integrating the dynamic sealing and heat-dissipating mechanisms, this screw air compressor system not only improves the sealing performance but also enhances the overall efficiency and reliability of the equipment.

[0039] When the second rack 35 operates under negative pressure inside the second chamber 6, the hot air and impurities between the rotating shaft 4 and the sealing ring 9 will be drawn into the auxiliary chamber 24. Then, the drawn-in impurities will be blocked by the blocking groove 26, enter the connecting pipe 29 through the inclined groove 27, and then enter the first collecting hopper 30 for impurity collection. The unblocked impurities will be transported to the second collecting hopper 31 inside the remaining impurities in the auxiliary chamber 24 when the second rack 35 operates under positive pressure inside the second chamber 6. When pressurized gas enters the second collecting hopper 31, the impurities are filtered through the filter screen provided at the upper end of the second collecting hopper 31, and then the sealing film 32 is pushed to rotate and open, and then transported to the first annular air outlet 17 through the return groove 16, enter between the rotors 3, and send the drawn-out gas back into the rotor 3. When the staff cleans the impurities inside the first collecting hopper 30 and the second collecting hopper 31 and screws them out, the outside air will not flow into the return groove 16 through the position where the second collecting hopper 31 is screwed out. The outside air is blocked by the sealing film 32 to prevent impurities in the air from entering the housing 1 through the return groove 16 and causing unnecessary damage. When the second rack 35 operates under negative pressure inside the second chamber 6, the hot air and impurities between the rotating shaft 4 and the sealing ring 9 are drawn into the auxiliary chamber. The drawn-in impurities are blocked by the blocking groove 26 and enter the connecting pipe through the inclined groove 27, and then enter the first collecting hopper 30 for collection. This mechanism effectively prevents the impurities from wearing the rotating shaft 4 and the sealing ring 9 and protects the normal operation of the equipment. When the pressurized gas enters the second collecting hopper 31, it pushes the sealing film 32 to rotate, causing the port of the return groove 16 to open, so that the gas can be transported to the first annular air outlet 17 through the return groove 16 and enter between the rotors 3, and send the drawn-out gas back into the rotor 3. This mechanism realizes the effective recovery of the gas and improves the gas compression efficiency of the air compressor. When the staff cleans the impurities inside the first collecting hopper 30 and the second collecting hopper 31, the sealing film 32 blocks the outside air outside to prevent it from entering the rotor 3. This design effectively prevents the outside gas from causing unnecessary damage to the rotor 3 and ensures the stable operation of the equipment.

[0040] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A screw air compressor with sealing compensation function, characterized in that: include: A housing (1), wherein a rotor (3) is installed inside the housing (1), and two ends of the rotor (3) are fixedly connected to a rotating shaft (4), and a rotating shaft groove (14) is provided inside the housing (1), and the rotor (3) is rotatably connected inside the rotating shaft groove (14) via the rotating shaft (4); A sealing member, the sealing member being arranged on the outside of one of the rotating shafts (4), the sealing member being provided with two sealing rings (9), and the two sealing rings (9) being arranged inside the rotating shaft groove (14); A driving mechanism is located outside the housing (1), and an output end of the driving mechanism reciprocates to alternately push the two sealing rings (9) to seal on the outer wall of the rotating shaft (4), so that the two sealing rings (9) perform alternate sealing. Since the sealing rings (9) work alternately, when one sealing ring (9) is in contact with the rotating shaft (4) to perform sealing, the other sealing ring (9) is in a recovery state. Also includes: A purge assistant, located inside the housing (1) and used to clean debris inside the sealing ring (9); Also includes: An auxiliary component is located inside the housing (1) and is used to cooperate with the purge auxiliary device to clean impurities in the gap between the sealing ring (9) and the rotating shaft (4).

2. A screw air compressor with sealing compensation function according to claim 1, characterized in that: The driving mechanism comprises a fixed frame (2) fixedly connected to the outer wall of the housing (1); a servo motor (33) is fixedly connected to the side wall of the fixed frame (2); an execution end of the servo motor (33) is fixedly connected to a spur gear (34); a gas leakage sensor (19) is installed inside the rotating shaft groove (14); a first chamber (5) and a second chamber (6) are respectively provided inside the fixed frame (2); two fixed rods (28) are slidably connected inside the fixed frame (2); one of the fixed rods (28) extends into the first chamber (5) and the other of the fixed rods (28) extends into the second chamber (6); one end of the two fixed rods (28) is fixedly connected to a first rack (13) and a second rack (35) respectively; and two sides of the spur gear (34) are respectively meshed with the first rack (13) and the second rack (35).

3. A screw air compressor with sealing compensation function according to claim 2, characterized in that: The driving mechanism further comprises electric telescopic rods (38) respectively mounted inside the two fixed rods (28); the execution ends of the two electric telescopic rods (38) respectively penetrate the outside of the fixed rods (28) and are fixedly connected to piston plates (39); the two piston plates (39) are respectively mounted inside the first chamber (5) and the second chamber (6); the outer walls of the first rack (13) and the second rack (35) are respectively fixedly connected to two sliders (36); a slide groove (37) matching the slider (36) is provided inside the fixed frame (2); the first rack (13) and the second rack (35) are respectively slidably connected inside the slide groove (37) through the slider (36); and a connecting component for connecting the first chamber (5) and the second chamber (6) is provided inside the housing (1).

4. A screw air compressor with sealing compensation function according to claim 3, characterized in that: The communication component comprises a first communication groove (7) and a second communication groove (10) provided inside the shell (1); air guide grooves are provided inside the first chamber (5) and the second chamber (6), respectively; the first communication groove (7) and the second communication groove (10) are connected to the first chamber (5) and the second chamber (6) respectively through the air guide grooves; an upper air groove (8) and a lower air groove (11) are provided inside the rotating shaft groove (14), the upper air groove (8) and the lower air groove (11) are connected to the first communication groove (7) and the second communication groove (10) respectively; the upper air groove (8) and the lower air groove (11) are separated by a partition (12), and the partition (12) is fixedly connected to the inside of the shell (1); the two sealing rings (9) are respectively installed inside the upper air groove (8) and the lower air groove (11); one of the sealing rings (9) is in close contact with the rotating shaft (4) in an initial state, and the other sealing ring (9) is separated from the rotating shaft (4).

5. The screw air compressor with sealing compensation function according to claim 4, characterized in that: The purge assistant comprises a connecting rod (40) fixedly connected to the outer wall of one of the fixing rods (28); one end of the connecting rod (40) penetrates the outside of the fixing frame (2) and extends to the inside of the shell (1) and is fixedly connected to an auxiliary piston rod (25); an auxiliary chamber (24) is provided inside the shell (1); the auxiliary piston rod (25) is slidably connected to the inside of the auxiliary chamber (24) through the connecting rod (40); an auxiliary groove (15) is provided inside the shell (1); the auxiliary chamber (24) is connected to the auxiliary groove (15); a third connecting groove (22) is provided inside the partition (12); the third connecting groove (22) is connected to the auxiliary groove (15); a fixing cover (20) is fixedly connected to the inside of the shell (1) above the rotating shaft (4); a one-way valve (21) is fixedly connected to the top of the fixing cover (20); a flow pipe (18) is installed at the output end of the one-way valve (21).

6. The screw air compressor with sealing compensation function according to claim 5, characterized in that: The auxiliary component comprises a plurality of blocking grooves (26) provided inside the auxiliary chamber (24); an inclined groove (27) is provided inside the auxiliary chamber (24); the plurality of blocking grooves (26) are in communication with the inclined groove (27); the outer surface of the shell (1) is threadedly connected to a first collecting bucket (30) and a second collecting bucket (31); a connecting pipe (29) is installed at the bottom of the inclined groove (27); one end of the connecting pipe (29) passes through the outside of the second communicating groove (10) and abuts against the feed port of the first collecting bucket (30); one end of the circulation pipe (18) passes through the inside of the shell (1) and abuts against the feed port of the second collecting bucket (31).

7. The screw air compressor with sealing compensation function according to claim 6, characterized in that: The upper parts of the first collecting hopper (30) and the second collecting hopper (31) are composed of filter sleeves, the outer walls of the lower parts are provided with threads, and the inner side of the shell (1) is provided with thread grooves matching the first collecting hopper (30) and the second collecting hopper (31).

8. The screw air compressor with sealing compensation function according to claim 7, characterized in that: The auxiliary component further comprises a reflux groove (16) provided inside the housing (1), a first annular air outlet (17) being provided inside the rotating shaft groove (14), the reflux groove (16) being in communication with the first annular air outlet (17), a sealing film (32) being installed inside the reflux groove (16), and the sealing film (32) being composed of four rotatable elastic sealing rubbers, and the four elastic sealing rubbers being in contact with each other.

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