Structure for dry gas seal installation and compressor

Abstract

The utility model relates to a structure for dry gas seal installation, which comprises a dry gas seal assembly installed on a main shaft, and the end face of a rotating assembly, close to the atmosphere side, of the dry gas seal assembly is fixedly connected with a torque transmission device. The torque transmission device is of an annular structure and is connected with the main shaft through a first radial connecting hole and a first connecting piece, and the torque transmission function is achieved. An anti-rotation device is arranged on the end face, close to a static assembly of the atmosphere side, of the dry gas sealing assembly and used for being connected with a machine shell. The anti-rotation device is of an annular structure and is connected with the machine shell through a second radial connecting hole and a second connecting piece, and the anti-rotation function of the static assembly is achieved. Starting from the sealing structure, the connecting piece of the torque transmission device of the rotating assembly is designed on the atmosphere side, the anti-rotating device of the static assembly is also designed on the atmosphere side, and the split design is adopted, so that the dry gas seal is convenient to install, the installation efficiency and accuracy are improved, and the torque transmission pin and the anti-rotating pin are prevented from being damaged during installation.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor seals, and particularly relates to a structure for dry gas seal installation and a compressor. Background Technique

[0002] Dry gas seal is a new type of non-contact shaft end seal. In actual application, based on the principle of fluid dynamics, hydrodynamic grooves are provided on the end face of the rotating ring of the seal, so that the seal end face can operate in a non-contact manner, with good sealing effect, almost achieving no leakage at the shaft end, and it has been widely used in compressors in industries such as petroleum and chemical industry.

[0003] Previously, the torque transmission device of the dry gas seal rotating assembly was designed at the front end of the dry gas seal rotating assembly, close to the medium side, and on the main shaft of the compressor unit. At the front end of the area where the dry gas seal is installed on the main shaft of the compressor unit, close to the medium side, torque transmission pins of the rotating assembly are designed. These torque transmission pins need to cooperate with the assembly holes or notches of the rotating assembly of the dry gas seal. The anti-rotation device of the stationary assembly of the dry gas seal is also designed at the front end of the dry gas seal, close to the medium side, and anti-rotation pins are designed on the compressor housing. These pins need to cooperate with the assembly holes or notches on the anti-rotation device of the stationary assembly of the dry gas seal. The installation of the dry gas seal is usually to install the seal from the front to the back into the cavity of the compressor (that is, install the dry gas seal from the medium side to the atmosphere side into the cavity of the compressor). Due to this design, when installing the dry gas seal, these mating pins cannot be clearly seen, and it is difficult to align the position at one time during the installation process, making it difficult to assemble the pins on the compressor and the assembly holes or notches on the dry gas seal well. Therefore, it is necessary to align the position and install multiple times, resulting in low installation efficiency. Even worse, during the assembly process, the pins may be broken or bent. Due to repeated installations, the rubber rings in contact with the main shaft and housing of the compressor unit by the dry gas seal are often damaged (these rubber rings are called rubber rings for dry gas seal installation). Summary of the Utility Model

[0004] In order to solve the above problems, the purpose of this patent application is to provide a structure for dry gas seal installation, and also provide a compressor. Starting from the structure of the seal, the connecting piece of the torque transmission device of the rotating assembly is designed on the atmosphere side, and the anti-rotation device of the stationary assembly is also designed on the atmosphere side, which is convenient for the installation of the dry gas seal, improves the installation efficiency and accuracy, and avoids damaging the torque transmission pins, anti-rotation pins and installation rubber rings during installation.

[0005] The utility model is realized through the following technical solutions:

[0006] The purpose of the present utility model is to provide a structure for dry gas seal installation, including a dry gas seal assembly installed on the main shaft. The end face of the rotating assembly of the dry gas seal assembly close to the atmosphere side is fixedly connected to a torque transmission device;

[0007] The torque transmission device is a ring structure, which is connected to the main shaft through a first radial connection hole and a first connecting piece to achieve the torque transmission function;

[0008] An anti-rotation device is provided on the end face of the stationary assembly of the dry gas seal assembly close to the atmosphere side for connection with the casing;

[0009] The anti-rotation device is a ring structure, which is connected to the casing through a second radial connection hole and a second connecting piece to achieve the anti-rotation function of the stationary assembly.

[0010] Furthermore, a plurality of first axial connection holes are provided on the torque transmission device. A third connecting piece passes through the first axial connection holes to fix the torque transmission device and the rotating assembly together.

[0011] Furthermore, a plurality of second axial connection holes are provided on the anti-rotation device. A fourth connecting piece passes through the second axial connection holes to fix the anti-rotation device and the stationary assembly together.

[0012] Furthermore, the first radial connection hole and the second radial connection hole are pin holes, and the first connecting piece and the second connecting piece are pins.

[0013] Furthermore, the torque transmission device is disconnected in the diameter direction to form two semi-circular structures, that is, split design, which is convenient for installation.

[0014] Furthermore, the anti-rotation device is composed of four petals, that is, one petal each on the upper, lower, left, and right sides, which is convenient for installation.

[0015] Furthermore, the first radial connection holes are arranged on the inner diameter circumference of the torque transmission device and are evenly distributed;

[0016] The second radial connection holes are arranged on the outer diameter circumference of the anti-rotation device, and a plurality of air holes are provided on the outer diameter circumference of the anti-rotation device.

[0017] Furthermore, the first axial connection holes are through holes.

[0018] Furthermore, the second axial connection holes are counterbored holes.

[0019] This application also provides a compressor, including the main shaft, casing, and dry gas seal structure of the compressor unit. A first assembly hole is provided on the main shaft and is connected to the torque transmission device through a first connecting piece;

[0020] The housing is provided with a second assembly hole and is connected to the housing through a second connecting member; the first assembly hole and the second assembly hole are pin holes or notches.

[0021] In an optional embodiment, the axial connection hole is a through hole, and the axial connecting member is a socket head cap screw.

[0022] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0023] The structure for dry gas seal installation and the compressor provided by the embodiment of the present utility model adopt a torque transmission device for the rotating component and an anti-rotation device for the stationary component on the atmosphere side in the dry gas seal structure. These torque transmission pins and anti-rotation pins are visible during the seal installation. The present utility model can ensure the successful installation of the seal at one time, and there is no need to align the installation position of the seal and the compressor multiple times. According to the design space of the user's unit, pin holes are designed and machined on the torque transmission device of the rotating component of the dry gas seal, and pins are assembled. Matching pin holes or notches are machined on the main shaft of the compressor unit. The pins on the torque transmission device of the rotating component of the dry gas seal cooperate with the pin holes or notches on the main shaft of the unit to play a role in torque transmission. Pin holes are designed and machined on the anti-rotation device of the stationary component of the dry gas seal, and pins are assembled. Matching pin holes or notches are machined on the housing of the compressor unit. The pins on the anti-rotation device of the stationary component of the dry gas seal cooperate with the pin holes or notches on the housing of the compressor unit to play a role in preventing the stationary component from rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the structure for dry gas seal installation provided by the embodiment of the present utility model;

[0026] Figure 2 It is a schematic structural diagram of the torque transmission device structure of the rotating component provided by the embodiment of the present utility model;

[0027] Figure 3 It is a cross-sectional view of the torque transmission device structure of the rotating component provided by the embodiment of the present utility model;

[0028] Figure 4 It is a schematic structural diagram of the anti-rotation device structure of the stationary component provided by the embodiment of the present utility model;

[0029] Figure 5 Cross-sectional view of the anti-rotation device structure of the stationary component provided by the embodiment of the present utility model;

[0030] Wherein: 1 - torque transmission device, 2 - first radial connection hole, 3 - first connecting piece, 4 - main shaft, 5 - first assembly hole, 6 - first axial connection hole, 7 - third connecting piece, 8 - rotating component, 10 - anti-rotation device, 20 - second radial connection hole, 30 - second connecting piece, 40 - housing, 50 - second assembly hole, 60 - second axial connection hole, 70 - fourth connecting piece, 80 - stationary component, air hole - 90. Specific embodiments

[0031] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with embodiments and drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and shall not be construed as a limitation to the present utility model.

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application described and illustrated herein can generally be arranged and designed in various different configurations.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0034] As Figures 1 - 5 shown, the present embodiment provides a structure for dry gas seal installation, including a dry gas seal assembly installed on the main shaft 4. The end face of the rotating component 8 on the atmosphere side of the dry gas seal assembly is fixedly connected to the torque transmission device 1, connecting the torque transmission device 1 of the rotating component to the rotating component 8 of the dry gas seal, and realizing the torque transmission function from the sealing structure;

[0035] The torque transmission device 1 is a ring structure, which is connected to the main shaft 4 through the first radial connection hole 2 and the first connecting piece 3, so that the torque transmission device 1 of the dry gas seal rotating component 8 is assembled to the main shaft 4 of the compressor unit to realize the torque transmission function;

[0036] On the end face of the stationary component 80 on the atmosphere side ( Figure 1 the right side, the left side is the medium side) of the dry gas seal assembly, there is an anti-rotation device 10 for connecting to the housing 40;

[0037] The anti-rotation device 10 is of a ring structure. A second radial connection hole 20 is formed in the anti-rotation device 10 of the stationary component on the atmosphere side ( Figure 1 the right side). A second connecting piece 30 for preventing the stationary component 80 of the seal from rotating is fitted in the second radial connection hole 20. The anti-rotation device 10 is assembled to the casing 40 of the compressor unit through the second radial connection hole 20 and the second connecting piece 30, so as to realize the anti-rotation function of the stationary component.

[0038] In another embodiment of the present application, a plurality of first axial connection holes 6 are formed in the end face of the torque transmission device 1 of the rotating component 8 on the atmosphere side and are evenly arranged. The first axial connection holes 6 connect the torque transmission device 1 of the rotating component 8 to the rotating component 8 of the dry gas seal through a third connecting piece 7, so as to realize the torque transmission function from the seal structure.

[0039] In another embodiment of the present application, a second axial connection hole 60 is formed in the anti-rotation device 10 of the stationary component 80 on the atmosphere side. The second axial connection hole 60 is formed in the end face of the anti-rotation device of the stationary component on the atmosphere side and is evenly arranged. The second axial connection hole 60 connects the anti-rotation device 10 of the stationary component 80 to the stationary component 80 of the dry gas seal through a fourth connecting piece 70, so as to realize the anti-rotation function of the stationary component from the seal structure. A plurality of air holes 90 are provided on the outer diameter circumference of the anti-rotation device 10 and are evenly distributed.

[0040] In another embodiment of the present application, the first radial connection holes 2 are formed on the inner diameter circumference of the torque transmission device 1 of the rotating component 8 on the atmosphere side and are evenly arranged. The first radial connection holes 2 on the torque transmission device 1 of the rotating component are pin holes, and the first connecting piece 3 of the torque transmission device 1 of the rotating component is a pin. According to the main shaft design space of the user's compressor unit, pin holes (first radial connection holes 2) are designed and machined on the torque transmission device 1 of the sealed rotating component, and pins are fitted. The center distance, size, depth and number of the pin holes on the torque transmission device 1 of the rotating component are determined by the main shaft size of the compressor unit;

[0041] The first axial connection holes 6 on the torque transmission device 1 of the rotating component are through holes. The first axial connection holes 6 connect the torque transmission device 1 of the rotating component to the rotating component 8 of the dry gas seal through a third connecting piece 7. According to the design space of the seal, through holes are designed on the torque transmission device 1 of the sealed rotating component, and corresponding threaded holes are designed on the sealed rotating component 8. The center distance and depth of the threaded holes are determined by the design space of the seal, and the number and specifications of the threaded holes are determined by the seal cavity pressure and the working conditions of the compressor unit;

[0042] The second radial connection holes 20 are opened on the outer diameter circumference of the anti-rotation device and are evenly arranged. The second radial connection holes 20 on the anti-rotation device 10 of the stationary assembly 80 on the atmospheric side are pin holes, and the second connecting member 30 of the anti-rotation device 10 of the stationary assembly 80 is a pin. According to the design space of the casing 40 of the user's compressor unit, pin holes are designed and machined on the anti-rotation device 10 of the sealed stationary assembly, and pins are assembled. The center distance, size, depth, and quantity of the pin holes on the anti-rotation device 10 of the stationary assembly 80 are determined by the size of the casing of the compressor unit;

[0043] The second axial connection holes 60 on the anti-rotation device 10 of the stationary assembly 80 are designed as counterbored holes to save axial space. The second axial connection holes 60 connect the anti-rotation device 10 of the stationary assembly 80 to the stationary assembly 80 of the dry gas seal through the fourth connecting member 70. According to the design space of the seal, counterbored holes are designed on the anti-rotation device 10 of the sealed stationary assembly, and corresponding threaded holes are designed on the sealed stationary assembly 80. The center distance and depth of the threaded holes are determined by the design space of the seal, and the quantity and specifications of the threaded holes are determined by the seal chamber pressure and the operating conditions of the compressor unit;

[0044] In this embodiment, the third connecting member 7 and the fourth connecting member 70 are hexagon socket countersunk head screws.

[0045] In another embodiment of the present application, as Figure 2 and Figure 3 shown, the torque transmission device 1 is disconnected in the diameter direction to form two semi-circular structures, that is, split design, which is convenient for installation.

[0046] In another embodiment of the present application, as Figure 4 and Figure 5 shown, the anti-rotation device 10 is composed of four petals, that is, one petal for each of the upper, lower, left, and right, which is convenient for installation.

[0047] The present application also provides a compressor, including the main shaft 4, casing 40 of the compressor unit, and dry gas seal structure. The compressor unit adopts known technology. A structure for dry gas seal installation is designed on the atmospheric side of the dry gas seal. Corresponding pin holes or notches (the first assembly hole 5 and the second assembly hole 50) are machined on the main shaft 4 and casing 40 of the compressor unit. The pins on the torque transmission device 1 of the rotating assembly 8 and the anti-rotation device 10 of the stationary assembly 80 cooperate with the corresponding pin holes or notches on the unit main shaft 4 and casing 40, and these pins are visible during the installation of the dry gas seal. The torque transmission of the rotating assembly and the anti-rotation function of the stationary assembly are realized from the dry gas seal structure, and the convenience of dry gas seal installation is also realized;

[0048] The axial connection holes of the torque transmission device 1 of the rotating assembly 8 and the anti-rotation device 10 of the stationary assembly 80 in the dry gas seal structure are through holes or counterbores. The torque transmission device of the rotating assembly and the anti-rotation device of the stationary assembly are respectively connected to the rotating assembly and the stationary assembly by socket head cap screws, so as to realize the torque transmission of the rotating assembly and the anti-rotation function of the stationary assembly on the dry gas seal structure.

[0049] The above specific embodiments have further detailed the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above are only the specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A structure for dry gas seal installation, characterized in that: It includes a dry gas seal assembly installed on the main shaft (4), and the end face of the rotating assembly (8) of the dry gas seal assembly close to the atmosphere side is fixedly connected to the torque transmission device (1); The torque transmission device (1) is of an annular structure, and it is connected to the main shaft (4) through the first radial connection hole (2) and the first connecting piece (3); An anti-rotation device (10) is provided on the end face of the stationary assembly (80) of the dry gas seal assembly close to the atmosphere side for connecting to the casing (40); The anti-rotation device (10) is of an annular structure, and it is connected to the casing (40) through the second radial connection hole (20) and the second connecting piece (30).

2. The structure for dry gas seal installation according to claim 1, wherein: A plurality of first axial connection holes (6) are provided on the torque transmission device (1), and the third connecting piece (7) passes through the first axial connection holes (6) to fix the torque transmission device (1) and the rotating assembly (8) together.

3. The structure for dry gas seal installation according to claim 1, characterized in that: A plurality of second axial connection holes (60) are provided on the anti-rotation device (10), and the fourth connecting piece (70) passes through the second axial connection holes (60) to fix the anti-rotation device (10) and the stationary assembly (80) together.

4. The structure for dry gas seal installation according to claim 1, characterized in that: The first radial connection hole (2) and the second radial connection hole (20) are pin holes, and the first connecting piece (3) and the second connecting piece (30) are pins.

5. The structure for dry gas seal installation according to claim 1, characterized in that: The torque transmission device (1) is disconnected in the diameter direction to form two semi-circular structures.

6. The structure for dry gas seal installation according to claim 1, wherein: The anti-rotation device (10) is composed of four petals combined.

7. The structure for dry gas seal installation according to claim 1, characterized in that: The first radial connection hole (2) is opened on the inner diameter circumference of the torque transmission device (1); The second radial connection hole (20) is opened on the outer diameter circumference of the anti-rotation device (10), and a plurality of air holes (90) are provided on the outer diameter circumference of the anti-rotation device (10).

8. The structure for dry gas seal installation according to claim 2, wherein: The first axial connection hole (6) is a through hole.

9. The structure for dry gas seal installation according to claim 3, characterized in that: The second axial connection hole (60) is a counterbore.

10. A compressor, comprising the structure for dry gas seal installation according to any one of claims 1-9, characterized in that: A first assembly hole (5) is provided on the main shaft (4) and is connected to the torque transmission device (1) through the first connecting piece (3); A second assembly hole (50) is opened on the casing (40) and is connected to the casing (40) through the second connecting piece (30).

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