Hydrogen production screw compressor seal gas device

Abstract

The utility model discloses a kind of hydrogen production screw compressor sealing gas devices, it is related to the sealing field of screw shaft end of compressor, including mutually interlocked male screw and female screw, the both ends of the male screw and the female screw are integrally formed with the end shaft that projects outward, the end shaft is rotatably connected with the inner wall of the cylinder portion of end plate through rotating bearing, the outer wall of the straight plate portion of end plate is equipped with the end cover that the end plate cylinder portion opening is closed, sealing mechanism is installed between the outer wall of the end shaft and the end of the male screw, female screw. The utility model is set to static sealing component assembly, rotating sealing piece in static sealing component assembly, rotating sealing piece will be in friction with dynamic sealing piece and rotate, to reduce the wear between dynamic sealing piece, prolong the service life of sealing piece.

Description

Technical Field

[0001] This utility model relates to the field of sealing the screw shaft end of a compressor, specifically a sealing gas device for a hydrogen production screw compressor. Background Technology

[0002] Screw compressors have high compression efficiency, good adaptability to gaseous conditions, and can handle hydrogen containing certain impurities and moisture. The flow rate can be easily adjusted according to the hydrogen production requirements.

[0003] In existing technology, the shaft end sealing mechanism of screw compressors generally consists of dynamic and static sealing rings working together to achieve a sealing effect. During the rotation of the male and female screws, the dynamic and static sealing rings rotate relative to each other. These two sealing rings gradually wear down, and after long-term use, the sealing performance gradually decreases. Utility Model Content

[0004] The purpose of this utility model is to provide a sealing gas device for a hydrogen production screw compressor in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing gas device for a hydrogen production screw compressor, comprising a male screw and a female screw that interlock, wherein both ends of the male screw and the female screw are integrally formed with outwardly protruding end shafts, the end shafts being rotatably connected to the inner wall of the cylindrical portion of an end plate via a rotating bearing, an end cap for sealing the opening of the cylindrical portion of the end plate being installed on the outer wall of the straight portion of the end plate, and a sealing mechanism being installed between the outer wall of the end shaft and the ends of the male screw and the female screw.

[0006] As a further embodiment of this utility model: the sealing mechanism includes a dynamic sealing element fixedly installed on the outer wall of the end shaft, and the sealing mechanism also includes a fixed plate fixedly installed on the inner wall of the cylindrical part of the end plate. A guide rod is axially slidably installed on the inner wall of the fixed plate. A static sealing element assembly is installed at one end of the guide rod and is slidably connected to the cylindrical part of the end plate and the outer wall of the end shaft. The static sealing element assembly is in contact with the end face of the end shaft that is close to it. A compensating spring that is sleeved with the guide rod is directly abutted between the end of the static sealing element assembly away from the end shaft and the end of the fixed plate.

[0007] As a further embodiment of this utility model: the static sealing component assembly includes a static sealing component and a rotary sealing component. The static sealing component is fixedly installed at one end of the guide rod and is fixedly connected to one end of the compensating spring. The rotary sealing component is rotatably installed at one end of the static sealing component and abuts against one end face of the dynamic sealing component. A nut is threadedly connected to the end of the guide rod away from the static sealing component.

[0008] As a further embodiment of this utility model: the stationary seal has an outwardly protruding rotating ring integrally formed at one end near the rotating seal, and the rotating seal has a rotating groove at one end near the stationary seal for the rotating ring to rotate, and the rotating ring and the rotating groove are rotatably connected by a connecting bearing.

[0009] As a further embodiment of this utility model: the end of the rotary seal near the dynamic seal is formed with an outwardly protruding sealing tooth, and the end of the dynamic seal near the rotary seal is integrally formed with a sealing groove that engages with the sealing tooth, and a labyrinth sealing cavity is formed between the sealing tooth and the sealing groove in the engaged state.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By setting a static sealing component assembly, the rotating seal in the static sealing component assembly will rotate with the moving seal under friction, thereby reducing wear between the rotating seal and the moving seal and extending the service life of the seal. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the end plate of this utility model;

[0014] Figure 3 For the present utility model Figure 2 Enlarged view of a portion of point A in the middle;

[0015] Figure 4 This is a schematic diagram showing the connection between the stationary seal and the rotary seal of this utility model;

[0016] Figure 5 This is a schematic diagram of the connection between the sealing tooth and the sealing groove of this utility model.

[0017] In the diagram: 1. Male screw; 2. Female screw; 3. End plate; 4. End cap; 5. End shaft; 6. Rotary bearing; 7. Dynamic seal; 8. Fixing plate; 9. Guide rod; 10. Nut; 11. Static seal assembly; 1101. Static seal; 1102. Rotary seal; 12. Compensating spring; 13. Rotating ring; 14. Rotating groove; 15. Sealing tooth; 16. Sealing groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-5 In this embodiment of the present invention, a sealing gas device for a hydrogen production screw compressor includes a male screw 1 and a female screw 2 that interlock with each other. Both ends of the male screw 1 and the female screw 2 are integrally formed with outwardly protruding end shafts 5. The end shafts 5 are rotatably connected to the inner wall of the cylindrical part of the end plate 3 through a rotating bearing 6. An end cap 4 is installed on the outer wall of the straight plate part of the end plate 3 to seal the opening of the cylindrical part of the end plate 3. A sealing mechanism is installed between the outer wall of the end shaft 5 and the ends of the male screw 1 and the female screw 2.

[0020] In this embodiment: when installing the male screw 1 and female screw 2, the end shaft 5 at the ends of the male screw 1 and female screw 2 is inserted into the cylindrical part of the end plate 3. Then, the rotating bearing 6 is installed on the outer wall of the end shaft 5, and the outer ring of the rotating bearing 6 is assembled with the inner wall of the cylindrical part of the end plate 3. After the assembly is completed, the end cover 4 is installed on the end plate 3. After the installation is completed, the two parts of the sealing mechanism are connected, and the sealing mechanism can perform airtight sealing on the ends of the male screw 1 and female screw 2 to avoid leakage problems during hydrogen production.

[0021] Please refer to this carefully. Figure 3 , Figure 4 and Figure 5 The sealing mechanism includes a dynamic seal 7 fixedly installed on the outer wall of the end shaft 5. The sealing mechanism also includes a fixed plate 8 fixedly installed on the inner wall of the cylindrical part of the end plate 3. A guide rod 9 is axially slidably installed on the inner wall of the fixed plate 8. A static seal assembly 11 is installed at one end of the guide rod 9 and is slidably connected to the cylindrical part of the end plate 3 and the outer wall of the end shaft 5. The static seal assembly 11 is in contact with the end face of the end shaft 5 that is close to it. A compensating spring 12 that is sleeved with the guide rod 9 is directly abutted between the end of the static seal assembly 11 away from the end shaft 5 and the end of the fixed plate 8.

[0022] In this embodiment: After the end shaft 5 is installed, one end of the dynamic seal 7 is connected to and abuts against the static seal assembly 11. During the process of the male screw 1 and the female screw 2 rotating in opposite directions, the dynamic seal 7 rotates synchronously with the end shaft 5. At this time, the part of the static seal assembly 11 that abuts against the dynamic seal 7 rotates under the action of friction. During this process, the compensating spring 12 applies sufficient thrust to the stationary part of the static seal assembly 11, so that the static seal assembly 11 and the dynamic seal 7 are always in abutting state, thereby maintaining the dynamic and static sealing state.

[0023] Please refer to this carefully. Figure 4 and Figure 5 The static sealing component assembly 11 includes a static seal 1101 and a rotary seal 1102. The static seal 1101 is fixedly installed on one end of the guide rod 9 and is fixedly connected to one end of the compensating spring 12. The rotary seal 1102 is rotatably installed on one end of the static seal 1101 and abuts against one end face of the dynamic seal 7. A nut 10 is threadedly connected to the end of the guide rod 9 away from the static seal 1101. A rotating ring 13 protruding outward is integrally formed on the end of the static seal 1101 near the rotary seal 1102. A rotating groove 14 for the rotating ring 13 to rotate is opened on the end of the rotary seal 1102 near the static seal 1101. The rotating ring 13 and the rotating groove 14 are rotatably connected by a connecting bearing.

[0024] In this embodiment: when the dynamic seal 7 rotates, the dynamic seal 7 drives the rotary seal 1102 to rotate synchronously. The rotary seal 1102 drives the rotating groove 14 to rotate around the outer periphery of the rotating ring 13. At this time, the stationary seal 1101 always remains stationary. This design can avoid the high frequency of wear caused by the relative rotational friction between the stationary seal assembly 11 and the dynamic seal 7.

[0025] Please refer to this carefully. Figure 4 and Figure 5 The rotary seal 1102 has an outwardly protruding sealing tooth 15 formed at one end near the dynamic seal 7, and the dynamic seal 7 has an integrally formed sealing groove 16 that engages with the sealing tooth 15 at one end near the rotary seal 1102. A labyrinth sealing cavity is formed between the sealing tooth 15 and the sealing groove 16 in the engaged state.

[0026] In this embodiment: when the rotary seal 1102 and the dynamic seal 7 are in a mating state, there is a labyrinth sealing cavity between the sealing teeth 15 and the sealing groove 16 in the meshing state. When the gas enters the low-pressure side from the high-pressure side, it will enter the end face of the rotary seal 1102 from the outer periphery of the dynamic seal 7 and flow in from between the dynamic seal 7 and the rotary seal 1102. Since the labyrinth sealing cavity is a tortuous channel and the gap of the sealing channel is very small, the fluid velocity increases. According to Bernoulli's equation, the pressure will decrease, forming a low-pressure area after each sealing tooth 15, so that the fluid pressure gradually decreases, which plays a role in interception and improves the sealing effect. Moreover, the gas will form a vortex in the labyrinth sealing cavity, which consumes the fluid flow and prevents gas leakage.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing gas device for a hydrogen production screw compressor, comprising a male screw (1) and a female screw (2) that interlock, characterized in that, Both ends of the male screw (1) and the female screw (2) are integrally formed with outwardly protruding end shafts (5). The end shafts (5) are rotatably connected to the inner wall of the cylindrical part of the end plate (3) through a rotating bearing (6). An end cap (4) is installed on the outer wall of the straight plate part of the end plate (3) to close the opening of the cylindrical part of the end plate (3). A sealing mechanism is installed between the outer wall of the end shaft (5) and the ends of the male screw (1) and the female screw (2). The sealing mechanism includes a dynamic seal (7) fixedly installed on the outer wall of the end shaft (5), and a fixing plate (8) fixedly installed on the inner wall of the cylindrical part of the end plate (3). A guide rod (9) is axially slidably installed on the inner wall of the fixing plate (8). A static seal assembly (11) is installed at one end of the guide rod (9) and is slidably connected to the cylindrical part of the end plate (3) and the outer wall of the end shaft (5). The end face of the static seal assembly (11) close to the end shaft (5) is in contact with the end face of the end shaft (5). A compensating spring (12) that is sleeved with the guide rod (9) is directly abutted against the end of the static seal assembly (11) away from the end shaft (5) and the end of the fixing plate (8).

2. The sealing gas device for a hydrogen production screw compressor according to claim 1, characterized in that, The static sealing component assembly (11) includes a static seal (1101) and a rotary seal (1102). The static seal (1101) is fixedly installed on one end of the guide rod (9) and fixedly connected to one end of the compensating spring (12). The rotary seal (1102) is rotatably installed on one end of the static seal (1101) and abuts against one end face of the dynamic seal (7). A nut (10) is threadedly connected to the end of the guide rod (9) away from the static seal (1101).

3. The sealing gas device for a hydrogen production screw compressor according to claim 2, characterized in that, The stationary seal (1101) has an integrally formed outwardly protruding rotating ring (13) at one end near the rotating seal (1102). The rotating seal (1102) has a rotating groove (14) at one end near the stationary seal (1101) for the rotating ring (13) to rotate. The rotating ring (13) and the rotating groove (14) are rotatably connected by a connecting bearing.

4. A sealing gas device for a hydrogen production screw compressor according to claim 3, characterized in that, The rotary seal (1102) has an outwardly protruding sealing tooth (15) at one end near the dynamic seal (7), and the dynamic seal (7) has an integrally formed sealing groove (16) that engages with the sealing tooth (15) at one end near the rotary seal (1102). A labyrinth sealing cavity is formed between the sealing tooth (15) and the sealing groove (16) in the engaged state.

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