A dry gas sealing structure for circulating hydrogen screw compressor

Abstract

The present invention relates to the technical field of dry gas sealing, and specifically to a dry gas sealing structure for a circulating hydrogen screw compressor, which solves the problems that the operation of the screw compressor is not stable enough, the inside of the dry gas sealing device is easily polluted and affects the normal use, and the air leakage efficiency cannot adapt to the air guide efficiency. The present invention comprises a rotor body, and a first leakage air hole, a second leakage air hole and an isolation air hole are arranged on the top of the outer wall of the rotor body from front to back in sequence. The outer wall of the rotor body is connected with a connecting tube near the front edge, and an L-shaped tube is fixedly passed through the inner wall of the connecting tube. The present invention designs the main sealing gas into a multi-channel gas source, and combines the isolation gas and the leakage gas to form a dry gas sealing system, which has the advantages of stabilizing the operation of the compressor and protecting the dry gas sealing device, and the inside of the dry gas sealing device will not be polluted and affect the normal use. At the same time, the air leakage efficiency of the dry gas sealing device can adapt to the air guide efficiency, and it is easy to use.

Description

Technical Field

[0001] The invention relates to the technical field of dry gas sealing, and in particular to a dry gas sealing structure for a circulating hydrogen screw compressor. Background Art

[0002] As the petrochemical industry places higher and higher requirements on the performance of compressors, the requirements on shaft seals are also becoming more and more stringent. Dry gas seals are a new type of non-contact shaft seal. Compared with other seals, dry gas seals have the characteristics of less leakage, less wear, longer life, lower energy consumption, simple and reliable operation, low maintenance, and the sealed fluid is not contaminated by oil. Mechanical seals have not been able to run dry, but dry gas seals use the dynamic pressure effect of the fluid to make the two rotating sealing end faces non-contact, and the leakage of the sealed medium is very small, thus achieving both sealing of gas and dry operation. In the field of compressor applications, whether centrifugal compressors, axial flow compressors, gear-driven compressors or turbine expanders, dry gas seals are being used more and more widely.

[0003] The existing dry gas sealing device has insufficient stability and cannot ensure the stable operation of the screw compressor. The interior of the existing dry gas sealing device is easily contaminated and affects normal use. At the same time, the air leakage efficiency of the existing dry gas sealing device cannot adapt to the air guide efficiency, which is inconvenient to use.

[0004] To this end, we propose a dry gas seal structure for circulating hydrogen screw compressor. Summary of the invention

[0005] The object of the present invention is to provide a dry gas sealing structure for a circulating hydrogen screw compressor that can ensure the stable operation of the screw compressor, avoid contamination of the inside of the dry gas sealing device that affects normal use, and improve the gas leakage efficiency to adapt to the gas guide efficiency, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dry gas sealing structure for a circulating hydrogen screw compressor, comprising a rotor body, a first leakage hole, a second leakage hole and an isolation hole are arranged on the top of the outer wall of the rotor body in sequence from front to back, the outer wall of the rotor body is connected with a connecting tube near the front edge, an L-shaped tube is fixedly passed through the inner wall of the connecting tube, and also includes an adjustment component for synchronously adjusting the sizes of the first leakage hole, the second leakage hole and the isolation hole to adapt to the gas guiding strength as the gas guiding strength of the L-shaped tube increases, and the adjustment component is arranged between the connecting tube and the rotor body; a filtering and collecting component is used to filter and intercept impurities in the gas entering the connecting tube along the L-shaped tube, and can clean and collect the filtered and intercepted impurities, and the filtering and collecting component is arranged between the connecting tube and the rotor body.

[0007] Preferably, the adjusting assembly includes a support rod, which is fixedly connected to the inner wall of the connecting tube, the end of the support rod is fixedly connected to a connecting ring, the interior of the connecting ring is slidably inserted with a guide column, the top of the guide column is fixedly connected to a bowl-shaped shell, a first spring is fixedly connected between the bowl-shaped shell and the connecting ring, the bowl-shaped shell is located directly below the lower port of the L-shaped tube, the first spring is slidably sleeved on the outer wall of the guide column, the upper edge of the bowl-shaped shell is fixedly connected to a fixing rod, the movement of the fixing rod passes through the upper end of the connecting tube, and the upper edge of the outer wall of the fixing rod is fixedly connected to a splicing rod, the end of the splicing rod away from the fixing rod is fixedly connected to a connecting rod, an expansion piece is provided between the connecting rod and the first leakage air hole, the second leakage air hole and the isolation air hole. By setting the adjusting assembly, the air leakage efficiency of the dry gas sealing device can adapt to the air guide efficiency, and it is easy to use.

[0008] Preferably, the expansion member comprises a frame, the frame is fixedly connected to the lower end of the connecting rod, and the lower end of the frame is rotatably connected to three groups of connecting plates in sequence from front to back, each group of

[0009] There are two connecting plates, which are symmetrically arranged. The lower ends of the two connecting plates are rotatably connected with sliding blocks. Three groups of two adjacent sliding blocks are respectively slidably inserted on the inner walls of the first leakage air hole, the second leakage air hole and the isolation air hole. Slide blocks are extended on the outer walls of the three groups of two adjacent sliding blocks. The three groups of two adjacent sliding blocks are slidably inserted in the inner wall of the rotor body. By setting an expansion piece, the leakage efficiency of the first leakage air hole, the second leakage air hole and the isolation air hole can be increased.

[0010] Preferably, the inner walls of the first leakage pore, the second leakage pore and the isolation pore are all provided with a slot, the sliding block slidably cooperates with the slot, and the inner wall of the rotor body is provided with a slide groove, the slider slidably cooperates with the slide groove, and by providing the slot and the slide groove, the sliding block and the slider are facilitated to slide in the inner wall of the rotor body.

[0011] Preferably, the filter collection assembly comprises an annular frame and an air pipe, a valve is installed on the air pipe, the annular frame is slidably fitted on the inner wall of the connecting cylinder near the lower edge, a first filter is fixedly connected to the inner wall of the annular frame, a protrusion is fixedly connected to the eccentric part of the upper surface of the first filter, a vertical rod is slidably inserted through the center of the inner wall of the first filter, the vertical rod is rotatably installed in the inner wall of the fixing frame, an inclined scraping rod is fixedly connected to the upper edge of the outer wall of the vertical rod, the bottom end of the scraping rod is fitted on the upper surface of the first filter, and the fixed One end of the fixed frame is fixedly connected to the inner wall of the connecting cylinder, the fixed frame is located below the first filter screen, the lower end of the annular frame is fixedly connected to a plurality of cylinders in an annular array around its center, the bottom ends of the plurality of cylinders are movably penetrated by a U-shaped plate, the plurality of U-shaped plates are fixedly connected to the inner wall of the connecting cylinder, a second spring is fixedly connected between the annular frame and the plurality of U-shaped plates, the plurality of second springs are respectively slidably sleeved on the outer walls of the plurality of cylinders, a driving member is provided at the lower end of the vertical rod, the air pipe is connected to the outer wall of the connecting cylinder, the air pipe

[0012] A dust collecting part is provided on the inner wall of the air pipe near the first filter screen, and a linkage part is provided between the dust collecting part and the driving part. By setting up a filtering and collecting assembly, impurities contained in the gas entering the connecting tube along the L-shaped pipe can be filtered and intercepted, and the impurities filtered and intercepted can be cleaned and collected centrally.

[0013] Preferably, the driving member includes a first bevel gear, a second bevel gear, a rotating shaft and a support plate, the rotating shaft passes through the inner wall of the connecting cylinder and is rotatably installed, the rotating shaft is located below the vertical pole, the first bevel gear and the second bevel gear are respectively fixedly connected to the rear end of the rotating shaft and the lower end of the vertical pole, the first bevel gear and the second bevel gear are meshed with each other, the support plate is fixedly connected to the front edge of the outer wall of the rotor body, a motor is fixedly passed through the inner wall of the support plate, a pulley is fixedly connected to the output shaft end of the motor and the outer wall of the rotating shaft, a belt is connected between the two pulleys, and the rotating shaft can be driven to rotate by setting the driving member.

[0014] Preferably, the dust collecting piece includes a cylinder, which is fixedly passed through the inner wall of the air pipe, and the bottom end of the cylinder is connected to a dust exhaust pipe, and a control valve is installed on the dust exhaust pipe, and the inner wall of the cylinder is fixedly connected to a second filter screen at the position corresponding to the air pipe, and a connecting column is slidably inserted through the center of the inner wall of the second filter screen, and a scraper is fixedly connected to the outer wall of the connecting column, and the scraper is attached to the rear surface of the second filter screen, the connecting column is slidably inserted into the rear end of the cross bar, and a hole groove is opened at the rear end of the cross bar, and the connecting column and the hole groove are slidably matched, and a third spring is horizontally connected between the inner wall of the hole groove and the front end of the cross bar, and the cross bar passes through and is rotatably installed in the inner wall of the U-shaped block, and the U-shaped block is fixedly connected to the inner wall of the air pipe, and the U-shaped block is located in front of the second filter screen. By setting the dust collecting piece, impurities intercepted by filtration can be collected.

[0015] Preferably, the linkage comprises a fifth bevel gear, a sixth bevel gear, a third bevel gear, a fourth bevel gear and a column, the column penetrates and is rotatably installed in the inner wall of the trachea, the fifth bevel gear and the sixth bevel gear are respectively fixedly connected to the upper end of the column and the front end of the cross bar, the third bevel gear and the fourth bevel gear are respectively fixedly connected to the lower end of the column and the front end of the rotating shaft, the fifth bevel gear and the sixth bevel gear are meshed with each other, and the third bevel gear and the fourth bevel gear are meshed with each other, and by setting a linkage, the cross bar can be driven to rotate when the rotating shaft rotates.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the dry gas sealing system combines the actual operating conditions of the enterprise, designs the main sealing gas into multiple gas sources, and combines the isolation gas and the leakage gas to form a dry gas sealing system, which has the advantages of stabilizing the operation of the compressor and protecting the dry gas sealing device, and the interior of the dry gas sealing device will not be contaminated and affect normal use. At the same time, the air leakage efficiency of the dry gas sealing device can adapt to the air guide efficiency, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

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

[0019] Figure 3 for Figure 2 Schematic diagram of the structure at A in FIG.

[0020] Figure 4 for Figure 2 Schematic diagram of the structure at B in FIG.

[0021] Figure 5 for Figure 2 Schematic diagram of the structure at C in FIG.

[0022] Figure 6 for Figure 2 Schematic diagram of the structure at D in FIG.

[0023] Figure 7 It is a partial cross-sectional view of the present invention;

[0024] Figure 8 It is a schematic diagram of the local structure of the present invention;

[0025] Fig. 9 Another partial cross-sectional view of the present invention.

[0026] In the attached drawings, the parts represented by the reference numerals are as follows: 1. rotor body; 2. isolation pores; 3. second leakage pores; 4. first leakage pores; 5. frame; 6. connecting rod; 7. splicing rod; 8. fixing rod; 9. air pipe; 10. support plate; 11. motor; 12. cylinder; 13. connecting cylinder; 14. valve; 15. connecting plate; 16. L-shaped tube; 17. bowl-shaped shell; 18. guide column; 19. first spring; 20. connecting ring; 21. support rod; 22. slider; 23. sliding block; 24. rotating shaft; 25. first bevel gear; 26. second bevel gear; 27, upright pole; 28, fixed frame; 29, annular frame; 30, first filter; 31, convex block; 32, scraper rod; 33, pulley; 34, belt; 35, third bevel gear; 36, fourth bevel gear; 37, upright pole; 38, fifth bevel gear; 39, sixth bevel gear; 40, cross bar; 41, U-shaped block; 42, second filter; 43, scraper; 44, dust exhaust pipe; 45, control valve; 46, connecting column; 47, slide groove; 48, cylinder; 49, second spring; 50, U-shaped plate; 51, third spring; 52, hole groove; 53, card groove. DETAILED DESCRIPTION

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

[0028] See also Figure 1-Figure 9, a dry gas sealing structure for a circulating hydrogen screw compressor shown in the figure includes a rotor body 1, on the top of the outer wall of the rotor body 1, a first leakage hole 4, a second leakage hole 3 and an isolation hole 2 are arranged in sequence from front to back, the outer wall of the rotor body 1 is connected with a connecting tube 13 near the front edge, an L-shaped tube 16 is fixedly passed through the inner wall of the connecting tube 13, and also includes an adjusting component for synchronously adjusting the sizes of the first leakage hole 4, the second leakage hole 3 and the isolation hole 2 to adapt to the gas guiding strength as the gas guiding strength of the L-shaped tube 16 increases, and the adjusting component is arranged between the connecting tube 13 and the rotor body 1; a filtering and collecting component is used to filter and intercept impurities in the gas entering the connecting tube 13 along the L-shaped tube 16, and can clean and collect the filtered and intercepted impurities, and the filtering and collecting component is arranged between the connecting tube 13 and the rotor body 1.

[0029] See also Figure 1 , Figure 2 and Figure 3 In the figure, the adjustment assembly includes a support rod 21, which is fixedly connected to the inner wall of the connecting tube 13, and the end of the support rod 21 is fixedly connected to a connecting ring 20, and a guide column 18 is slidably inserted inside the connecting ring 20. The top of the guide column 18 is fixedly connected to a bowl-shaped shell 17, and a first spring 19 is fixedly connected between the bowl-shaped shell 17 and the connecting ring 20. The bowl-shaped shell 17 is located directly below the lower end of the L-shaped tube 16. The first spring 19 is slidably sleeved on the outer wall of the guide column 18, and a fixing rod 8 is fixedly connected to the upper edge of the bowl-shaped shell 17. The movement of the fixing rod 8 runs through the upper end of the connecting tube 13, and a splicing rod 7 is fixedly connected to the upper edge of the outer wall of the fixing rod 8. The end of the splicing rod 7 away from the fixing rod 8 is fixedly connected to a connecting rod 6, and an expansion piece is provided between the connecting rod 6 and the first leakage pore 4, the second leakage pore 3 and the isolation pore 2.

[0030] See also Figure 1 , Figure 2 and Figure 4 In the figure, the expansion member includes a frame 5, which is fixedly connected to the lower end of the connecting rod 6. The lower end of the frame 5 is rotatably connected with three groups of connecting plates 15 from front to back in sequence. The number of each group of connecting plates 15 is two, and the two connecting plates 15 are symmetrically arranged. The lower ends of the two connecting plates 15 are rotatably connected with sliding blocks 23. The three groups of two adjacent sliding blocks 23 are respectively slidably inserted on the inner walls of the first leakage pore 4, the second leakage pore 3 and the isolation pore 2. Slide blocks 22 are extended on the outer walls of the three groups of two adjacent sliding blocks 23. The three groups of two adjacent sliding blocks 22 are slidably inserted in the inner wall of the rotor body 1.

[0031] See also Figure 4In the figure, a slot 53 is provided on the inner wall of the first leakage pore 4, the second leakage pore 3 and the isolation pore 2, and the sliding block 23 is slidably matched with the slot 53. A slot 47 is provided in the inner wall of the rotor body 1, and the slider 22 is slidably matched with the slot 47.

[0032] In this embodiment, external hydrogen, external nitrogen or process gas from the exhaust end of the compressor can be introduced into the L-shaped tube 16, and the external hydrogen, external nitrogen or process gas from the exhaust end of the compressor can enter the rotor body 1. The gas blown out along the L-shaped tube 16 can be blown toward the bowl-shaped shell 17. Under the special shape of the bowl-shaped shell 17, when the intensity of the gas blown out along the L-shaped tube 16 becomes stronger and stronger, the bowl-shaped shell 17 can be blown downward by the gas, and the bowl-shaped shell 17 can continue to move downward as the gas intensity increases. When the bowl-shaped shell 17 moves downward, it can squeeze the first spring 19 connected to the connecting ring 20, and the bowl-shaped shell 17 can drive the fixing rod 8, the splicing rod 7 and the connecting rod 6 to move downward, then the frame 5 can move downward, and when the frame 5 moves downward, the frame 5 The three groups of two adjacent connecting plates 15 connected at the lower end can rotate towards each other, and the sliding blocks 23 rotatably connected to the two connecting plates 15 can slide outward at the same time, and the three groups of two adjacent sliding blocks 23 can slide outward at the same time, the sliding block 23 can slide in the slot 53, and the sliding block 23 can drive the slider 22 to slide in the slide groove 47. The simultaneous outward sliding of the three groups of two adjacent sliding blocks 23 can gradually increase the exhaust range of the first leakage hole 4, the second leakage hole 3 and the isolation hole 2. As the gas conduction strength of the external hydrogen, external nitrogen or the process gas at the exhaust end of the compressor increases, the exhaust efficiency of the first leakage hole 4, the second leakage hole 3 and the isolation hole 2 will also increase, which is convenient to use. Example

[0033] See also Figure 5 and Figure 8In the figure, the filter collection assembly includes an annular frame 29 and an air pipe 9, a valve 14 is installed on the air pipe 9, the annular frame 29 is slidably fitted on the inner wall of the connecting tube 13 near the lower edge, a first filter screen 30 is fixedly connected to the inner wall of the annular frame 29, a protrusion 31 is fixedly connected to the eccentric part of the upper surface of the first filter screen 30, a vertical rod 27 is slidably inserted through the center of the inner wall of the first filter screen 30, the vertical rod 27 is rotatably installed in the inner wall of the fixing frame 28, an inclined scraper rod 32 is fixedly connected to the upper edge of the outer wall of the vertical rod 27, the bottom end of the scraper rod 32 is fitted on the upper surface of the first filter screen 30, and one end of the fixing frame 28 is fixedly connected to the inner wall of the connecting tube 13 The fixing frame 28 is located below the first filter screen 30. The lower end of the annular frame 29 is fixedly connected to a plurality of cylinders 48 in an annular array around its center. The bottom ends of the plurality of cylinders 48 are movably penetrated by a U-shaped plate 50. The plurality of U-shaped plates 50 are fixedly connected to the inner wall of the connecting tube 13. A second spring 49 is fixedly connected between the annular frame 29 and the plurality of U-shaped plates 50. The plurality of second springs 49 are respectively slidably sleeved on the outer walls of the plurality of cylinders 48. A driving member is provided at the lower end of the vertical rod 27. The air pipe 9 is connected to the outer wall of the connecting tube 13. The air pipe 9 is close to the first filter screen 30. A dust collecting member is provided on the inner wall of the air pipe 9. A linkage member is provided between the dust collecting member and the driving member.

[0034] See also Figure 1 , Figure 2 and Figure 5 In the figure, the driving member includes a first bevel gear 25, a second bevel gear 26, a rotating shaft 24 and a support plate 10. The rotating shaft 24 passes through the inner wall of the connecting tube 13 and is rotatably installed. The rotating shaft 24 is located below the vertical rod 27. The first bevel gear 25 and the second bevel gear 26 are respectively fixedly connected to the rear end of the rotating shaft 24 and the lower end of the vertical rod 27. The first bevel gear 25 and the second bevel gear 26 are meshed with each other. The support plate 10 is fixedly connected to the front edge of the outer wall of the rotor body 1. The motor 11 is fixedly passed through the inner wall of the support plate 10. The output shaft end of the motor 11 and the outer wall of the rotating shaft 24 are fixedly connected with pulleys 33, and a belt 34 is connected between the two pulleys 33.

[0035] In this embodiment, dust contained in the gas entering the connecting tube 13 can be intercepted by the first filter screen 30 to prevent the dust from entering the interior of the rotor body 1 and affecting the normal use of the rotor body 1. After the first filter screen 30 has been used for a period of time, the motor 11 is connected to an external power source, so that the motor 11 can drive the two pulleys 33 and the belt 34 to rotate together, and the rotating shaft 24 can rotate accordingly. Since the first bevel gear 25 and the second bevel gear 26 are meshed with each other, the vertical rod 27 can rotate accordingly, and the vertical rod 27 can drive the scraper rod 32 to scrape the dust on the upper surface of the first filter screen 30. Every time the scraper rod 32 passes through the protrusion 31, it will push the annular frame 29 downward to squeeze and contact with the plurality of The second spring 49 connected between the two U-shaped plates 50 is once and the annular frame 29 can rebound under the force of the second spring 49, so as the scraper rod 32 rotates, the first filter screen 30 can continuously and slightly shake up and down, and the dust adhering to the upper surface of the first filter screen 30 can be shaken up, which has a very good cleaning effect on the first filter screen 30. The valve 14 on the air pipe 9 is opened, and then the air pipe 9 is connected to the vacuum pump and the vacuum pump is started. The vacuum pump is a well-known prior art and will not be described in detail. The air pipe 9 can extract the dust scraped up by the scraper rod 32 and the shaken dust, thereby cleaning the first filter screen 30 and ensuring the long-term normal use of the first filter screen 30. Example

[0036] See also Figure 1 , Figure 2 and Figure 6 , this embodiment further illustrates embodiment 2. In the figure, the dust collecting member includes a cylinder 12, which is fixedly passed through the inner wall of the air pipe 9, and the bottom end of the cylinder 12 is connected to a dust exhaust pipe 44, and a control valve 45 is installed on the dust exhaust pipe 44. The inner wall of the cylinder 12 is fixedly connected to a second filter screen 42 corresponding to the air pipe 9. A connecting column 46 is slidably inserted through the center of the inner wall of the second filter screen 42. A scraper 43 is fixedly connected to the outer wall of the connecting column 46. The scraper 43 is attached to the rear surface of the second filter screen 42. The connecting column 46 is slidably inserted into the rear end of the cross bar 40. A hole groove 52 is opened at the rear end of the cross bar 40. The connecting column 46 and the hole groove 52 are slidably matched. A third spring 51 is horizontally connected between the inner wall of the hole groove 52 and the front end of the cross bar 40. The cross bar 40 passes through the inner wall of the U-shaped block 41 for rotation. The U-shaped block 41 is fixedly connected to the inner wall of the air pipe 9, and the U-shaped block 41 is located in front of the second filter screen 42.

[0037] See also Figure 6In the figure, the linkage parts include a fifth bevel gear 38, a sixth bevel gear 39, a third bevel gear 35, a fourth bevel gear 36 and a column 37. The column 37 is rotatably installed in the inner wall of the trachea 9. The fifth bevel gear 38 and the sixth bevel gear 39 are respectively fixedly connected to the upper end of the column 37 and the front end of the cross bar 40. The third bevel gear 35 and the fourth bevel gear 36 are respectively fixedly connected to the lower end of the column 37 and the front end of the rotating shaft 24. The fifth bevel gear 38 and the sixth bevel gear 39 are meshed with each other, and the third bevel gear 35 and the fourth bevel gear 36 are meshed with each other.

[0038] In this embodiment, the dust extracted by the air pipe 9 can enter the cylinder 12, and the dust can be intercepted by the second filter screen 42, and the cylinder 12 can collect the dust. The control valve 45 on the dust exhaust pipe 44 can be opened regularly to discharge the collected dust. When the rotating shaft 24 rotates, it can drive the fourth bevel gear 36 to rotate, and the third bevel gear 35 can rotate accordingly. The third bevel gear 35 can drive the column 37 to rotate, and the fifth bevel gear 38 and the sixth bevel gear 39 can rotate accordingly, and the sixth bevel gear 39 can drive the cross bar 40 By rotating, the cross bar 40 can drive the connecting column 46 to rotate, and the connecting column 46 can drive the scraper 43 to scrape the rear end surface of the second filter screen 42, so that the dust adhering to the rear end surface of the second filter screen 42 can be scraped off, thereby ensuring the permeability of the second filter screen 42. At the same time, the connecting column 46 is connected to the hole groove 52 at the rear end of the cross bar 40 through the third spring 51. Under the action of the third spring 51, the scraper 43 can scrape the rear end surface of the second filter screen 42 tightly, and the scraping effect is very good, which has a good cleaning effect on the second filter screen 42 and avoids the second filter screen 42 from being blocked.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry gas sealing structure for a circulating hydrogen screw compressor, comprising: A rotor body (1), wherein a first leakage pore (4), a second leakage pore (3) and an isolation pore (2) are sequentially arranged on the top of the outer wall of the rotor body (1) from front to back, a connection tube (13) is connected to the outer wall of the rotor body (1) near the front edge, and an L-shaped tube (16) is fixedly passed through the inner wall of the connection tube (13), characterized in that it also includes: an adjustment component for synchronously adjusting the sizes of the first leakage pore (4), the second leakage pore (3) and the isolation pore (2) as the air conduction strength of the L-shaped tube (16) increases to adapt to the air conduction strength, the adjustment component being arranged between the connection tube (13) and the rotor body (1); a filtering and collecting component for filtering and intercepting impurities contained in the gas entering the connection tube (13) along the L-shaped tube (16), and cleaning and centrally collecting the filtered and intercepted impurities, the filtering and collecting component being arranged between the connection tube (13) and the rotor body (1); The adjustment assembly comprises a support rod (21), the support rod (21) being fixedly connected to the inner wall of the connecting tube (13), the end of the support rod (21) being fixedly connected to a connecting ring (20), a guide column (18) being slidably inserted into the interior of the connecting ring (20), the top of the guide column (18) being fixedly connected to a bowl-shaped shell (17), a first spring (19) being fixedly connected between the bowl-shaped shell (17) and the connecting ring (20), the bowl-shaped shell (17) being located directly below the lower end of the L-shaped tube (16), and the first The spring (19) is slidably sleeved on the outer wall of the guide column (18); a fixing rod (8) is fixedly connected to the upper edge of the bowl-shaped shell (17); the fixing rod (8) moves through the upper end of the connecting tube (13); a splicing rod (7) is fixedly connected to the upper edge of the outer wall of the fixing rod (8); an end of the splicing rod (7) away from the fixing rod (8) is fixedly connected to a connecting rod (6); an expansion piece is provided between the connecting rod (6) and the first leakage pore (4), the second leakage pore (3) and the isolation pore (2); The expansion member comprises a frame (5), wherein the frame (5) is fixedly connected to the lower end of the connecting rod (6), and the lower end of the frame (5) is rotatably connected to three groups of connecting plates (15) in sequence from front to back, each group of connecting plates (15) comprises two connecting plates, and the two connecting plates (15) are symmetrically arranged, and the lower ends of the two connecting plates (15) are rotatably connected to sliding blocks (23), and the three groups of two adjacent sliding blocks (23) are respectively slidably inserted on the inner walls of the first leakage pore (4), the second leakage pore (3) and the isolation pore (2), and the outer walls of the three groups of two adjacent sliding blocks (23) are each extended with a sliding block (22), and the three groups of two adjacent sliding blocks (22) are each slidably inserted in the inner wall of the rotor body (1); A slot (53) is provided on the inner walls of the first leakage pore (4), the second leakage pore (3) and the isolation pore (2), the sliding block (23) is slidably engaged with the slot (53), a sliding slot (47) is provided in the inner wall of the rotor body (1), and the sliding block (22) is slidably engaged with the sliding slot (47).

2. A dry gas sealing structure for a circulating hydrogen screw compressor according to claim 1, characterized in that: The filter collection assembly comprises an annular frame (29) and an air pipe (9), the air pipe (9) being provided with a valve (14), the annular frame (29) being slidably fitted on the inner wall of the connecting tube (13) near the lower edge, a first filter screen (30) being fixedly connected to the inner wall of the annular frame (29), a protrusion (31) being fixedly connected to the eccentric portion of the upper surface of the first filter screen (30), a vertical rod (27) being slidably inserted through the center of the inner wall of the first filter screen (30), the vertical rod (27) being rotatably mounted through the inner wall of a fixing frame (28), an inclined scraper rod (32) being fixedly connected to the upper edge of the outer wall of the vertical rod (27), the bottom end of the scraper rod (32) being fitted on the upper surface of the first filter screen (30), one end of the fixing frame (28) being fixedly connected to the inner wall of the connecting tube (13), The fixing frame (28) is located below the first filter screen (30); the lower end of the annular frame (29) is fixedly connected to a plurality of cylinders (48) in an annular array around its center; the bottom ends of the plurality of cylinders (48) are movably penetrated by a U-shaped plate (50); the plurality of U-shaped plates (50) are fixedly connected to the inner wall of the connecting tube (13); a second spring (49) is fixedly connected between the annular frame (29) and the plurality of U-shaped plates (50); the plurality of second springs (49) are respectively slidably sleeved on the outer walls of the plurality of cylinders (48); a driving member is provided at the lower end of the vertical rod (27); the air pipe (9) is connected to the outer wall of the connecting tube (13); the air pipe (9) is close to the first filter screen (30); a dust collecting member is provided on the inner wall of the air pipe (9); and a linkage member is provided between the dust collecting member and the driving member.

3. A dry gas sealing structure for a circulating hydrogen screw compressor according to claim 2, characterized in that: The driving member comprises a first bevel gear (25), a second bevel gear (26), a rotating shaft (24) and a supporting plate (10); the rotating shaft (24) is rotatably mounted through the inner wall of the connecting tube (13); the rotating shaft (24) is located below the vertical rod (27); the first bevel gear (25) and the second bevel gear (26) are respectively fixedly connected to the rear end of the rotating shaft (24) and the lower end of the vertical rod (27); the first bevel gear (25) and the second bevel gear (26) are meshed with each other; the supporting plate (10) is fixedly connected to the front edge of the outer wall of the rotor body (1); a motor (11) is fixedly penetrated through the inner wall of the supporting plate (10); a pulley (33) is fixedly connected to the output shaft end of the motor (11) and the outer wall of the rotating shaft (24); a belt (34) is connected between the two pulleys (33).

4. A dry gas sealing structure for a circulating hydrogen screw compressor according to claim 2, characterized in that: The dust collecting member comprises a cylinder (12), the cylinder (12) being fixedly passed through the inner wall of the air pipe (9), and the bottom end of the cylinder (12) being connected to a dust exhaust pipe (44), the dust exhaust pipe (44) being provided with a control valve (45), a second filter screen (42) being fixedly connected to the inner wall of the cylinder (12) corresponding to the air pipe (9), a connecting column (46) being slidably inserted through the center of the inner wall of the second filter screen (42), a scraper (43) being fixedly connected to the outer wall of the connecting column (46), and the scraper (43) being attached to the second filter screen (42). The rear surface of the cross bar (40) is slidably inserted into the rear end of the cross bar (40), and the rear end of the cross bar (40) is provided with a hole groove (52). The connecting column (46) and the hole groove (52) are slidably matched. A third spring (51) is horizontally connected between the inner wall of the hole groove (52) and the front end of the cross bar (40). The cross bar (40) is rotatably installed in the inner wall of the U-shaped block (41). The U-shaped block (41) is fixedly connected to the inner wall of the air pipe (9). The U-shaped block (41) is located in front of the second filter screen (42).

5. A dry gas sealing structure for a circulating hydrogen screw compressor according to claim 4, characterized in that: The linkage member comprises a fifth bevel gear (38), a sixth bevel gear (39), a third bevel gear (35), a fourth bevel gear (36) and a column (37); the column (37) is rotatably mounted through the inner wall of the air pipe (9); the fifth bevel gear (38) and the sixth bevel gear (39) are respectively fixedly connected to the upper end of the column (37) and the front end of the crossbar (40); the third bevel gear (35) and the fourth bevel gear (36) are respectively fixedly connected to the lower end of the column (37) and the front end of the rotating shaft (24); the fifth bevel gear (38) and the sixth bevel gear (39) are meshed with each other; and the third bevel gear (35) and the fourth bevel gear (36) are meshed with each other.

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