Centrifugal compressor impeller labyrinth sealer

Abstract

The utility model discloses a centrifugal compressor impeller labyrinth sealer, which belongs to the field of impeller labyrinth sealers and comprises a rotating shaft, a labyrinth sealer body is movably inserted on the outer side of the rotating shaft, a plurality of zigzag grooves are arranged on the inner side of the labyrinth sealer body, and a fixed cylinder is fixedly connected on the outer side of the rotating shaft. A plurality of first blocks are fixedly connected to the top of the labyrinth sealer body, a plurality of inserting grooves matched with the first blocks are formed in the bottom of the fixing cylinder, the outer sides of the first blocks are movably connected to the inner sides of the corresponding inserting grooves in an inserted mode, first grooves are formed in the outer sides of the first blocks, and second blocks are movably connected to the inner sides of the first grooves in an inserted mode. A plurality of second grooves matched with the second blocks are formed in the inner side of the fixing cylinder. The labyrinth sealer is reasonable in structural design, through cooperation of the hand wheel, the fixing cylinder, the fixing rod, the first block, the second block, the spring and the U-shaped block, the labyrinth sealer body can be conveniently fixed to the device, and therefore a user can conveniently disassemble the labyrinth sealer.

Description

Technical Field

[0001] The utility model relates to the field of impeller labyrinth seals, in particular to an impeller labyrinth seal for a centrifugal compressor. Background Technique

[0002] During the operation of a centrifugal compressor, an effective sealing device is required between the impeller and the compressor housing to prevent the leakage of the compressed medium and ensure the efficiency and safe operation of the compressor. Traditional sealing methods such as mechanical seals and packing seals have problems such as short service life and complex maintenance. Therefore, the development of a new type of efficient and reliable seal has become an industry demand.

[0003] When the existing impeller labyrinth seals are in use, most of the impeller labyrinth seals are directly fixed at a certain place of the device. After long-term use, the impeller labyrinth seals may have problems, which makes it necessary for users to replace the new impeller labyrinth seals. However, this fixing method of the impeller labyrinth seals makes it difficult for users to disassemble them; therefore, we propose an impeller labyrinth seal for a centrifugal compressor to solve this problem. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an impeller labyrinth seal for a centrifugal compressor to solve the problems raised in the above background technique.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An impeller labyrinth seal for a centrifugal compressor, comprising: a rotating shaft, a labyrinth seal body is movably inserted outside the rotating shaft, and a plurality of zigzag grooves are formed inside the labyrinth seal body. A fixed cylinder is fixedly connected to the outside of the rotating shaft. A plurality of first blocks are fixedly connected to the top of the labyrinth seal body. A plurality of slots adapted to the first blocks are formed at the bottom of the fixed cylinder. The outside of the plurality of first blocks is movably inserted inside the corresponding slots, and a first groove is formed on the outside of each of the plurality of first blocks. A second block is movably inserted inside each of the plurality of first grooves, and a plurality of second grooves adapted to the second blocks are formed inside the fixed cylinder. The outside of the plurality of second blocks is slidably connected inside the corresponding second grooves.

[0007] Preferably, a plurality of U-shaped blocks are fixedly connected to the outside of the fixed cylinder. A spring is fixedly connected to one side of each of the plurality of U-shaped blocks, and the other end of each of the plurality of springs is fixedly connected to one side of the corresponding second block. A handwheel is threadedly connected to the outside of the fixed cylinder, and the inside of the handwheel is movably abutted against the outside of the second block.

[0008] Preferably, cylinders are fixedly connected to one side of each of the plurality of U-shaped blocks, fixing rods are slidably connected to the inner sides of the plurality of cylinders, one sides of the plurality of fixing rods are fixedly connected to the outer sides of the corresponding second blocks, and a friction pad is fixedly sleeved on the outer side of the handwheel.

[0009] Preferably, an impeller is fixedly connected to the outer side of the rotating shaft.

[0010] Preferably, a flange is fixedly connected to the outer side of the rotating shaft, and a plurality of threaded holes are formed in the top of the flange.

[0011] Preferably, a plurality of threaded blocks are fixedly connected to the outer side of the labyrinth seal body.

[0012] In the present utility model, for a centrifugal compressor impeller labyrinth seal, by placing the rotating shaft inside a certain device to make it rotate and work, and the threaded holes inside the flange facilitate the user to install other mechanisms. When the impeller and the rotating shaft start to rotate, the impeller rotates to generate high-speed air flow. When these high-speed air flows pass through the labyrinth seal body, due to the tortuous design of the channels of the labyrinth seal body, the air flow velocity decreases and the pressure rises. This pressure difference will prevent the gas from leaking from the impeller side to the housing side, thereby achieving the sealing effect. And when it is necessary to replace the labyrinth seal body after the device has been used for a long time, the handwheel can be rotated so that the inner side of the handwheel no longer abuts against the outer side of the second block. At this time, the labyrinth seal body can be directly pulled out. After replacing the new labyrinth seal body;

[0013] In the present utility model, for a centrifugal compressor impeller labyrinth seal, by inserting the labyrinth seal body into the inner side of the fixed cylinder. When the labyrinth seal body is inserted, the first block first enters the inner side of the slot. Further, the first block presses the second block, causing the spring to contract, and the second block slides in the second slot. Further, when the first block is completely inserted into the inner side of the slot, the second block is no longer pressed by the first block at this time, and under the action of the spring, it starts to reset. Further, the second block enters the corresponding first slot of the first block. At this time, the handwheel is rotated so that the inner side of the handwheel abuts against the outer side of the second block, thereby completing the fixation of the labyrinth seal body and the rotating shaft;

[0014] The structure of the present utility model is reasonably designed. Through the cooperation among the handwheel, the fixed cylinder, the fixing rod, the first block, the second block, the spring and the U-shaped block, the labyrinth seal body can be conveniently fixed to the device, thereby facilitating the user to disassemble it. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a centrifugal compressor impeller labyrinth seal proposed by the present utility model;

[0016] Figure 2Schematic cross-sectional structure diagram of a labyrinth seal for an impeller of a centrifugal compressor proposed by the present utility model;

[0017] Figure 3 is Figure 2 the enlarged view A of the local part in

[0018] In the figure: 1, rotating shaft; 2, labyrinth seal body; 3, zigzag groove; 4, fixed cylinder; 5, handwheel; 6, first block; 7, second block; 8, fixed rod; 9, cylinder; 10, spring; 11, U-shaped block; 12, impeller; 13, flange; 14, threaded block. Specific implementation mode

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying 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.

[0020] Referring to Figures 1-3 , a labyrinth seal for an impeller of a centrifugal compressor includes: a rotating shaft 1, a labyrinth seal body 2 is movably inserted outside the rotating shaft 1, and a plurality of zigzag grooves 3 are opened inside the labyrinth seal body 2. A fixed cylinder 4 is fixedly connected to the outside of the rotating shaft 1. A plurality of first blocks 6 are fixedly connected to the top of the labyrinth seal body 2. A plurality of slots adapted to the first blocks 6 are opened at the bottom of the fixed cylinder 4. The outside of the plurality of first blocks 6 are movably inserted inside the corresponding slots, and a first groove is opened on the outside of the plurality of first blocks 6. A second block 7 is movably inserted inside each of the plurality of first grooves, and a plurality of second grooves adapted to the second blocks 7 are opened inside the fixed cylinder 4. The outside of the plurality of second blocks 7 are slidably connected inside the corresponding second grooves.

[0021] In this embodiment, a plurality of U-shaped blocks 11 are fixedly connected to the outside of the fixed cylinder 4. A spring 10 is fixedly connected to one side of each of the plurality of U-shaped blocks 11, and the other end of each of the plurality of springs 10 is fixedly connected to one side of the corresponding second block 7. A handwheel 5 is threadedly connected to the outside of the fixed cylinder 4. The inside of the handwheel 5 is movably abutted against the outside of the second block 7. A cylinder 9 is fixedly connected to one side of each of the plurality of U-shaped blocks 11, and a fixed rod 8 is slidably connected inside each of the plurality of cylinders 9. One side of each of the plurality of fixed rods 8 is fixedly connected to the outside of the corresponding second block 7. A friction pad is fixedly sleeved on the outside of the handwheel 5, which is convenient for the user to hold the handwheel 5 and rotate.

[0022] In this embodiment, an impeller 12 is fixedly connected to the outside of the rotating shaft 1. A flange 13 is fixedly connected to the outside of the rotating shaft 1, and a plurality of threaded holes are opened at the top of the flange 13. A plurality of threaded blocks 14 are fixedly connected to the outside of the labyrinth seal body 2, which is convenient for installing other mechanisms.

[0023] In this embodiment, during use, the rotating shaft 1 is placed inside a certain device to make it rotate and work. Moreover, the threaded holes inside the flange 13 facilitate the user to install other mechanisms. When the impeller 12 and the rotating shaft 1 start to rotate, the impeller 12 rotates to generate high-speed airflows. When these high-speed airflows pass through the labyrinth seal body 2, due to the tortuous design of the channels of the labyrinth seal body 2, the airflow speed decreases and the pressure increases. This pressure difference will prevent the gas from leaking from the impeller 12 side to the housing side, thereby achieving the sealing effect. And when it is necessary to replace the labyrinth seal body 2 after the device has been used for a long time, the handwheel 5 can be rotated so that the inside of the handwheel 5 no longer abuts against the outside of the second block 7. At this time, the labyrinth seal body 2 can be directly pulled out. After replacing the new labyrinth seal body 2, the labyrinth seal body 2 is inserted into the inside of the fixed cylinder 4. When the labyrinth seal body 2 is inserted, the first block 6 first enters the inside of the slot. Further, the first block 6 squeezes the second block 7, causing the spring 10 to contract, and the second block 7 slides in the second slot. Further, when the first block 6 is completely inserted into the inside of the slot, the second block 7 is no longer squeezed by the first block 6 and starts to reset under the action of the spring 10. Further, the second block 7 enters the inside of the first slot of the corresponding first block 6. At this time, the handwheel 5 is rotated so that the inside of the handwheel 5 abuts against the outside of the second block 7, thereby completing the fixation of the labyrinth seal body 2 to the rotating shaft 1.

[0024] The above has introduced in detail a labyrinth seal for the impeller of a centrifugal compressor provided by the present utility model. Specific embodiments are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A labyrinth seal for a centrifugal compressor impeller, characterized in that, Including: A rotating shaft (1), with a labyrinth seal body (2) movably inserted on the outer side of the rotating shaft (1), and a plurality of zigzag grooves (3) are formed on the inner side of the labyrinth seal body (2). A fixed cylinder (4) is fixedly connected to the outer side of the rotating shaft (1). A plurality of first blocks (6) are fixedly connected to the top of the labyrinth seal body (2). A plurality of slots adapted to the first blocks (6) are formed at the bottom of the fixed cylinder (4). The outer sides of the plurality of first blocks (6) are movably inserted into the corresponding slots, and a first groove is formed on the outer side of each of the plurality of first blocks (6). A second block (7) is movably inserted into each of the plurality of first grooves, and a plurality of second grooves adapted to the second blocks (7) are formed on the inner side of the fixed cylinder (4). The outer sides of the plurality of second blocks (7) are slidably connected to the corresponding second grooves.

2. The labyrinth seal of a centrifugal compressor impeller according to claim 1, characterized in that, A plurality of U-shaped blocks (11) are fixedly connected to the outer side of the fixed cylinder (4). A spring (10) is fixedly connected to one side of each of the plurality of U-shaped blocks (11), and the other ends of the plurality of springs (10) are fixedly connected to one side of the corresponding second block (7). A handwheel (5) is threadedly connected to the outer side of the fixed cylinder (4), and the inner side of the handwheel (5) is movably abutted against the outer side of the second block (7).

3. The labyrinth seal of a centrifugal compressor impeller according to claim 2, characterized in that, A cylinder (9) is fixedly connected to one side of each of the plurality of U-shaped blocks (11). A fixed rod (8) is slidably connected to the inner side of each of the plurality of cylinders (9). One side of each of the plurality of fixed rods (8) is fixedly connected to the outer side of the corresponding second block (7), and a friction pad is fixedly sleeved on the outer side of the handwheel (5).

4. A labyrinth seal for a centrifugal compressor impeller according to claim 1, characterized in that, An impeller (12) is fixedly connected to the outer side of the rotating shaft (1).

5. A labyrinth seal for a centrifugal compressor impeller according to claim 1, characterized in that, A flange plate (13) is fixedly connected to the outer side of the rotating shaft (1), and a plurality of threaded holes are formed in the top of the flange plate (13).

6. A labyrinth seal for a centrifugal compressor impeller according to claim 1, wherein, A plurality of threaded blocks (14) are fixedly connected to the outer side of the labyrinth seal body (2).

Images