Screw sealing structure of centrifugal vapor compressor

Abstract

The utility model relates to the technical field of centrifugal vapor compressors, and discloses a screw sealing structure of a centrifugal vapor compressor, which comprises a screw piece, a volute is rotatably connected to the periphery of the screw piece, a pressing groove is arranged in the middle of the rear wall of the volute, a connecting ring is clamped in a mounting groove, a cavity is arranged in the connecting ring, and a sealing ring is arranged in the cavity. The inner front wall of the cavity is fixedly connected with uniformly distributed springs I, the rear ends of the multiple springs I are fixedly connected with an annular plate, the annular plate is slidably connected to the inner wall of the cavity, the rear wall of the annular plate is fixedly connected with an extrusion ring, and the rear wall of the extrusion ring is fixedly connected with a sealing ring; the rear wall of the sealing ring penetrates through the inner front wall of the pressing groove and abuts against the front wall of the pressing disc. According to the utility model, under the combined action of the screw rod piece, the volute, the pressure plate, the pressure groove, the sealing ring, the extrusion ring, the annular plate, the spring I and the mounting groove, the sealing performance of screw rod connection can be improved, and the sealing effect reduction caused by the aging of the sealing ring can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal steam compressors, in particular to a screw seal structure of a centrifugal steam compressor. Background Technique

[0002] A compressor is a mechanical device used to compress the volume of gas or air into a smaller space, thereby increasing the pressure of the gas. A centrifugal steam compressor is a device that uses centrifugal force to accelerate and compress steam. It drives the connected impeller to rotate through a high-speed rotating screw, so that the steam can be thrown from the center to the outside to increase the kinetic energy of the steam, and then the kinetic energy is converted into pressure energy through a diffuser.

[0003] However, during the operation of a centrifugal steam compressor, the screw will pass through the volute to drive the impeller to rotate. Therefore, it is necessary to ensure the sealing performance at the connection between the screw and the volute to avoid the influence on the compression effect caused by steam leakage through the connection. However, the existing sealing structures usually use sealing parts such as sealing rings for sealing. However, relying solely on the sealing of the sealing ring will result in poor sealing effect, and the service life of the sealing ring is limited. As the sealing ring is used, the sealing ring will gradually age. At this time, it is necessary for the staff to regularly check and replace the sealing ring, which is rather troublesome. Summary of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a screw seal structure of a centrifugal steam compressor, aiming to improve the problem of poor sealing effect in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: A screw seal structure of a centrifugal steam compressor, including a screw member, a volute is rotatably connected to the outer periphery of the screw member, a pressure groove is opened in the middle of the rear wall of the volute, a pressure plate is clamped in the pressure groove, the inner wall of the pressure plate is fixedly connected to the outer periphery of the screw member, an installation groove is opened in the middle of the front wall of the volute, a connection ring is clamped in the installation groove, a chamber is opened inside the connection ring, a uniformly distributed first spring is fixedly connected to the front wall inside the chamber, the rear ends of the plurality of first springs are fixedly connected to a ring plate, the ring plate is slidably connected to the inner wall of the chamber, an extrusion ring is fixedly connected to the rear wall of the ring plate, a sealing ring is fixedly connected to the rear wall of the extrusion ring, and the rear wall of the sealing ring penetrates through the front wall inside the pressure groove and abuts against the front wall of the pressure plate.

[0006] Through the above technical scheme: It can improve the sealing performance of the screw connection and prevent the sealing effect from decreasing due to the aging of the sealing ring.

[0007] As a further description of the above technical scheme:

[0008] On both sides of the outer wall of the connecting ring, mounting blocks are fixedly connected. One ends of two second springs are fixedly connected to the mutually adjacent side walls inside the two mounting blocks. The other ends of the two second springs are fixedly connected to moving plates. On the front walls of the two moving plates, dial blocks are fixedly connected. One ends of the two dial blocks away from the moving plates penetrate through the front walls of the mounting blocks. One ends of the two moving plates away from the second springs are fixedly connected to clamping blocks. One ends of the two clamping blocks away from the moving plates penetrate into the volute interior.

[0009] Through the above technical solution: The effect of facilitating the replacement of the sealing ring can be achieved.

[0010] As a further description of the above technical solution:

[0011] An annular groove is provided on the outer periphery inside the mounting groove. The two clamping blocks are both clamped and slidably connected to the inner wall of the annular groove.

[0012] Through the above technical solution: When the screw member rotates, the connecting ring will also rotate accordingly under the action of friction.

[0013] As a further description of the above technical solution:

[0014] Guide rods penetrate through the middle parts of the two moving plates. Both ends of the two guide rods are fixedly connected to the two side walls inside the mounting blocks. The two second springs are both arranged on the outer periphery of the guide rods.

[0015] Through the above technical solution: It can prevent the second springs from bending when being compressed.

[0016] As a further description of the above technical solution:

[0017] On the front wall inside the chamber, uniformly distributed limiting rods are fixedly connected. The rear ends of the multiple limiting rods all penetrate through the annular plate and are fixedly connected to the rear wall inside the chamber. The multiple first springs are all arranged on the outer periphery of the limiting rods.

[0018] Through the above technical solution: It can prevent the first springs from bending when being compressed.

[0019] As a further description of the above technical solution:

[0020] An impeller is fixedly connected to the front end of the screw member.

[0021] Through the above technical solution: The steam inside the device can be compressed.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the present utility model, under the combined action of the screw member, volute, pressure plate, pressure groove, sealing ring, extrusion ring, ring plate, spring one, and mounting groove, the sealing ring can be continuously pressed, thereby improving the sealing performance of the screw connection and preventing the sealing effect from decreasing due to the aging of the sealing ring.

[0024] 2. In the present utility model, under the combined action of the dial block, moving plate, clamping block, mounting groove, volute, connecting ring, sealing ring, mounting block, and spring two, the connecting ring can be disassembled and assembled, so as to achieve the effect of facilitating the replacement of the sealing ring. Description of the Drawings

[0025] Figure 1 is a three-dimensional view of a screw sealing structure of a centrifugal steam compressor proposed by the present utility model;

[0026] Figure 2 is an internal connection structure diagram of the connecting ring in a screw sealing structure of a centrifugal steam compressor proposed by the present utility model;

[0027] Figure 3 is Figure 2 the enlarged view of part A in

[0028] Legend Explanation:

[0029] 1. Screw member; 2. Volute; 3. Mounting groove; 4. Impeller; 5. Mounting block; 6. Dial block; 7. Pressure plate; 8. Sealing ring; 9. Pressure groove; 10. Extrusion ring; 11. Ring plate; 12. Spring one; 13. Limit rod; 14. Chamber; 15. Guide rod; 16. Spring two; 17. Moving plate; 18. Ring groove; 19. Clamping block; 20. Connecting ring. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer to Figures 1 - 3, an embodiment provided by the present utility model: a screw seal structure of a centrifugal steam compressor, including a screw member 1, a volute 2 is rotatably connected to the outer periphery of the screw member 1, a pressure groove 9 is formed in the middle of the rear wall of the volute 2, a pressure plate 7 is clamped in the pressure groove 9, the inner wall of the pressure plate 7 is fixedly connected to the outer periphery of the screw member 1, an installation groove 3 is formed in the middle of the front wall of the volute 2, a connection ring 20 is clamped in the installation groove 3, a chamber 14 is formed inside the connection ring 20, a uniformly distributed first spring 12 is fixedly connected to the front wall inside the chamber 14, the rear ends of the plurality of first springs 12 are fixedly connected to a ring plate 11, the ring plate 11 is slidably connected to the inner wall of the chamber 14, an extrusion ring 10 is fixedly connected to the rear wall of the ring plate 11, a sealing ring 8 is fixedly connected to the rear wall of the extrusion ring 10, and the rear wall of the sealing ring 8 penetrates through the front wall inside the pressure groove 9 and abuts against the front wall of the pressure plate 7; a uniformly distributed limiting rod 13 is fixedly connected to the front wall inside the chamber 14, the rear ends of the plurality of limiting rods 13 all penetrate through the ring plate 11 and are fixedly connected to the rear wall inside the chamber 14, and the plurality of first springs 12 are all arranged on the outer periphery of the limiting rod 13;

[0032] Specifically, when the screw member 1 passes through the volute 2, the pressure plate 7 connected to the screw member 1 will be clamped into the pressure groove 9 on the rear wall of the volute 2. As the pressure plate 7 is clamped, the sealing ring 8 will be extruded. When the sealing ring 8 is pressed, it will move into the chamber 14 in the connection ring 20. When the sealing ring 8 moves, it can push the extrusion ring 10 to move. Through the extrusion ring 10, the ring plate 11 can be driven to move. When the ring plate 11 moves, the first spring 12 connected to the ring plate 11 can be compressed. When the first spring 12 is compressed, it can provide a reverse acting force. Thus, through the first spring 12, the ring plate 11 can be pushed to drive the fixed extrusion ring 10 to move towards the pressure plate 7. When the extrusion ring 10 moves, it can drive the sealing ring 8 to squeeze towards the pressure plate 7. Therefore, under the action of the pressure plate 7 and the extrusion ring 10, the sealing ring 8 can be tightly pressed from the front and rear sides. At the same time, under the action of the limiting rod 13, the stability of the movement of the ring plate 11 can be ensured, and the first spring 12 can be prevented from bending when being compressed. Thus, through the continuous pressing of the sealing ring 8, the sealing performance of the screw connection can be improved, and the sealing effect can be prevented from decreasing due to the aging of the sealing ring 8.

[0033] Referring to Figures 1 - 3 , both sides of the outer wall of the connection ring 20 are fixedly connected with installation blocks 5. One ends of two second springs 16 are fixedly connected to the side walls close to each other inside the two installation blocks 5. The other ends of the two second springs 16 are fixedly connected to a moving plate 17. The front walls of the two moving plates 17 are fixedly connected with a dial block 6. One ends of the two dial blocks 6 far from the moving plate 17 penetrate through the front walls of the installation blocks 5. One ends of the two moving plates 17 far from the second springs 16 are fixedly connected with a clamping block 19. One ends of the two clamping blocks 19 far from the moving plate 17 penetrate into the inside of the volute 2; a guide rod 15 penetrates through the middle of the two moving plates 17. Both ends of the two guide rods 15 are fixedly connected to the two side walls inside the installation blocks 5. The two second springs 16 are both arranged on the outer periphery of the guide rod 15;

[0034] Specifically, by toggling the dial block 6, the fixed moving plate 17 can be driven to move. When the moving plate 17 moves, the connected clamping block 19 can be driven to move. After the clamping block 19 is completely retracted into the installation groove 3, the limit between the clamping block 19 and the volute 2 can be cancelled, so that the connecting ring 20 and the sealing ring 8 can be withdrawn and disassembled from the installation groove 3, and the sealing ring 8 can be replaced. When installation is required, only the connecting ring 20 needs to be directly snapped into the installation groove 3. During the process of snapping the connecting ring 20 into place, the installation groove 3 will contact and squeeze the clamping block 19. Since the contact surface between the clamping block 19 and the installation groove 3 is an inclined surface, as the clamping block 19 is squeezed, the clamping block 19 can be pushed to drive the moving plate 17 to move into the installation block 5, and the moving plate 17 will also compress the second spring 16 when it moves. After the connecting ring 20 is completely snapped into the installation groove 3, under the action of the second spring 16, the moving plate 17 can be pushed to drive the clamping block 19 to snap into the volute 2 for fixation, thus achieving the effect of facilitating the replacement of the sealing ring 8. And under the action of the guide rod 15, the stability of the movement of the moving plate 17 can be ensured, and the second spring 16 can be prevented from bending when compressed.

[0035] Refer to Figures 1 - 3 As shown in the figure, an annular groove 18 is formed on the outer periphery of the inner part of the installation groove 3, and both clamping blocks 19 are snapped and slidably connected to the inner wall of the annular groove 18; the front end of the screw member 1 is fixedly connected with an impeller 4;

[0036] Specifically, by providing the annular groove 18, after the connecting ring 20 is snapped into the installation groove 3, the clamping block 19 will snap into the annular groove 18. After the clamping block 19 snaps into the annular groove 18, on the basis of limiting the connecting ring 20, the connecting ring 20 and the clamping block 19 can be rotated along the annular groove 18. Thus, during the sealing process, when the screw member 1 rotates, the connecting ring 20 will also rotate accordingly under the action of friction, which can reduce the friction generated by sealing and ensure the stability of the rotation of the screw member 1; when the screw member 1 rotates, the impeller 4 can be driven to rotate, thereby compressing the steam inside the device.

[0037] Working principle: In actual use, when the screw 1 passes through the volute 2, the pressure plate 7 will be stuck in the pressure groove 9 and squeeze the sealing ring 8, so that the extrusion ring 10 can be pushed to drive the ring plate 11 to move. When the ring plate 11 moves, it can compress the spring 12. When the spring 12 is compressed, it can provide a reverse action to push the ring plate 11 to drive the sealing ring 8 to move toward the pressure plate 7. Therefore, under the action of the pressure plate 7 and the extrusion ring 10, the sealing ring 8 can be pressed tightly, thereby improving the screw connection. The sealing effect can be improved and the sealing ring 8 can be prevented from decreasing due to aging. In addition, by moving the shift block 6, the movable plate 17 and the clamping block 19 can be driven to move. When the clamping block 19 is completely retracted into the mounting groove 3, the limit between the clamping block 19 and the volute 2 can be cancelled, so that the connecting ring 20 and the sealing ring 8 can be pulled out from the mounting groove 3 and the sealing ring 8 can be replaced. When installation is required, the connecting ring 20 only needs to be directly inserted into the mounting groove 3 to be fixed, thereby achieving the effect of facilitating the replacement of the sealing ring 8.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw seal structure for a centrifugal steam compressor, comprising a screw member (1), characterized in that: A volute (2) is rotatably connected to the outer periphery of the screw member (1). A pressure groove (9) is formed in the middle of the rear wall of the volute (2). A pressure plate (7) is clamped in the pressure groove (9). The inner wall of the pressure plate (7) is fixedly connected to the outer periphery of the screw member (1). An installation groove (3) is formed in the middle of the front wall of the volute (2). A connection ring (20) is clamped in the installation groove (3). A chamber (14) is formed inside the connection ring (20). A uniformly distributed first spring (12) is fixedly connected to the front wall inside the chamber (14). The rear ends of the plurality of first springs (12) are fixedly connected to an annular plate (11). The annular plate (11) is slidably connected to the inner wall of the chamber (14). An extrusion ring (10) is fixedly connected to the rear wall of the annular plate (11). A sealing ring (8) is fixedly connected to the rear wall of the extrusion ring (10). The rear wall of the sealing ring (8) penetrates through the front wall inside the pressure groove (9) and abuts against the front wall of the pressure plate (7).

2. The screw seal structure of a centrifugal steam compressor according to claim 1, wherein: Installation blocks (5) are fixedly connected to both sides of the outer wall of the connection ring (20). One ends of uniformly distributed second springs (16) are fixedly connected to the side walls close to each other inside the two installation blocks (5). The other ends of the two second springs (16) are fixedly connected to moving plates (17). Pushing blocks (6) are fixedly connected to the front walls of the two moving plates (17). One ends of the two pushing blocks (6) far away from the moving plates (17) penetrate through the front walls of the installation blocks (5). One ends of the two moving plates (17) far away from the second springs (16) are fixedly connected to locking blocks (19). One ends of the two locking blocks (19) far away from the moving plates (17) penetrate into the volute (2).

3. The screw seal structure of a centrifugal steam compressor according to claim 2, characterized in that: An annular groove (18) is formed in the outer periphery inside the installation groove (3). The two locking blocks (19) are both clamped and slidably connected to the inner wall of the annular groove (18).

4. The screw seal structure of a centrifugal steam compressor according to claim 2, characterized in that: Guide rods (15) penetrate through the middle parts of the two moving plates (17). Both ends of the two guide rods (15) are fixedly connected to the two side walls inside the installation blocks (5). The two second springs (16) are both arranged on the outer peripheries of the guide rods (15).

5. The screw seal structure of a centrifugal steam compressor according to claim 1, characterized in that: Limit rods (13) are fixedly connected to the front wall inside the chamber (14) in a uniformly distributed manner. The rear ends of the plurality of limit rods (13) penetrate through the annular plate (11) and are fixedly connected to the rear wall inside the chamber (14). The plurality of first springs (12) are both arranged on the outer peripheries of the limit rods (13).

6. The screw seal structure of a centrifugal steam compressor according to claim 1, characterized in that: An impeller (4) is fixedly connected to the front end of the screw member (1).

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