A containerized double-sided staggered labyrinth sealing device and its installation method

Abstract

The present invention discloses a containerized double-sided staggered labyrinth seal device and an installation method thereof, the device comprises a rotor assembly, a stator assembly, a sealing cavity assembly and a dynamic and stator connecting piece, the rotor labyrinth teeth are axially compressed and fixed on the installation sleeve by an axial compression sleeve, the locking transmission sleeve fixes the installation sleeve on the connecting dummy shaft, the stator labyrinth teeth are fixed in the sealing cavity assembly through the shaft end gland, a sealing gap is formed between the rotor labyrinth teeth and the stator labyrinth teeth, an eccentric piece is fixed on the shaft end gland, the eccentric piece is stuck in the installation sleeve positioning groove to achieve axial positioning of the rotor assembly and the stator assembly, and the connecting dummy shaft is respectively fixed to the installation sleeve and the sealing cavity assembly to achieve radial positioning of the rotor assembly and the stator assembly. The present invention solves the problem of being difficult to disassemble and assemble as a whole while ensuring that the double-sided staggered labyrinth seal is installed in place and has high flow resistance characteristics by ensuring the installation gap detection method of a certain thickness of metal strip can be drawn out of the sealing gap.

Description

Technical Field

[0001] The present invention belongs to the technical field of cylindrical fluid seals, and specifically relates to a containerized double-sided staggered labyrinth seal device and an installation method thereof, which is suitable for shaft end and interstage seal devices of large turbine machinery such as various gas turbines, steam turbines, compressors, etc. Background Art

[0002] As an important component of large turbine machinery, the sealing performance and reliability of the sealing device are crucial to the production efficiency and operation safety of mechanical equipment. At present, according to whether the two parts that make up the relative motion sealing pair are in contact, they can be divided into contact type and non-contact type dynamic seals. Because the parts of the contact dynamic seal are in contact with each other, there is direct contact friction between the rotor and the stator during operation, and the friction will cause the temperature of the contact surface between the rotor and the stator to rise, irreversible material wear and equipment vibration, which will lead to the deterioration of sealing performance and stability, shortened service life and reduced reliability. Therefore, contact dynamic seals are mostly used in low-speed and low-pressure conditions. As the operation of equipment develops towards high speed and high pressure, non-contact dynamic seals are more and more widely used in large rotating machinery, because there is a certain sealing gap between the parts of the relative motion, which can avoid a series of problems caused by friction and wear caused by contact.

[0003] As a typical non-contact seal, labyrinth seal is widely used in cylindrical rotating mechanical equipment due to its advantages such as simple structure and low cost. Labyrinth seals are mainly divided into three typical structural forms: straight-through type, staggered type and stepped type. Among the three, the teeth of the staggered labyrinth seal are arranged in a zigzag shape along the axial direction, and a dissipation cavity is formed between the dynamic and static teeth. Therefore, the flow channel formed by the seal is more complex and tortuous than that of the straight-through and stepped labyrinth seals, which significantly inhibits its air permeability and straight-through effect. When the fluid flows through the staggered flow channel, the flow resistance is greater, the vortex dissipation capacity is stronger, and the pressure energy is converted into more internal energy of the fluid. Therefore, compared with the straight-through and stepped labyrinth seals, the leakage is significantly smaller. However, because the staggered teeth are formed by the labyrinth teeth on the rotor and the labyrinth teeth on the stator being staggered along the axial direction, the traditional double-sided staggered labyrinth seal can only be designed as a split-flap structure, so it is difficult to disassemble and assemble, and the split-flap surface brings additional leakage channels, which greatly limits the application of double-sided staggered labyrinth seals in many devices. It is urgent to develop a new double-sided staggered labyrinth seal structure that can be assembled as a whole without splitting the stator assembly up and down. At the same time, in order to prevent the rotor teeth and the stator teeth from rubbing against each other during the rotation process, the installation sealing gap between the labyrinth seal rotor and the stator needs to be strictly guaranteed during the initial assembly. However, due to the existence of actual assembly errors, the actual sealing gap is not in an ideal circumferentially uniform state, which will generate airflow excitation force and increase the probability of friction between the seal rotor and the stator, which will have an adverse effect on the sealing leakage prevention effect and the unit operation stability. Therefore, how to propose a double-sided staggered labyrinth seal that can maintain high flow resistance characteristics, is easy to disassemble and assemble, and can accurately control the installation sealing gap is a problem that needs to be solved urgently. Summary of the invention

[0004] In order to solve the problem that the conventional double-sided staggered labyrinth seal needs to be installed in an upper and lower petal type and the installation sealing gap is uneven, the present invention provides a containerized double-sided staggered labyrinth seal device and an installation method thereof.

[0005] The technical solution of the present invention is:

[0006] A containerized double-sided staggered labyrinth sealing device comprises a rotor assembly, a stator assembly, a sealing cavity assembly and a dynamic and stator connecting piece. The rotor assembly comprises a rotor labyrinth tooth, a mounting sleeve, an axially pressing sleeve and a locking transmission sleeve. The stator assembly comprises a stator labyrinth tooth and a shaft end pressure cover. The dynamic and stator connecting piece comprises an eccentric piece and a connecting dummy shaft. A group of rotor labyrinth teeth connected in sequence are axially pressed by the axially pressing sleeve and limited on the mounting sleeve. The locking transmission sleeve fixes the mounting sleeve on the connecting dummy shaft. A group of stator labyrinth teeth connected in sequence are fixed in the sealing cavity assembly through the shaft end pressure cover. The rotor labyrinth teeth and the stator labyrinth teeth are staggered to form a sealing gap. The eccentric piece is fixed on the shaft end pressure cover and clamped in the mounting sleeve positioning groove on the outer surface of the mounting sleeve to realize axial positioning of the rotor assembly and the stator assembly. The connecting dummy shaft is respectively fixed to the mounting sleeve and the sealing cavity assembly to realize radial positioning of the rotor assembly and the stator assembly. A metal thin strip is provided at the sealing gap.

[0007] Furthermore, a first auxiliary sealing ring is provided radially between the rotor labyrinth teeth and the mounting sleeve, and the two side end faces of each rotor labyrinth tooth are respectively provided with a first end face tooth and a second end face tooth, and the second end face tooth of the rotor labyrinth tooth is meshed with the first end face tooth of the adjacent rotor labyrinth tooth to ensure transmission between adjacent rotor labyrinth teeth.

[0008] Furthermore, a second auxiliary sealing ring is provided radially between the stator labyrinth teeth and the sealing cavity assembly, a stator axial sleeve is provided axially between the stator labyrinth teeth and the shaft end pressure cover, and a stator adjustment gasket for adjusting the axial position of the stator labyrinth teeth is provided axially between the stator labyrinth teeth and the sealing cavity assembly.

[0009] Furthermore, the sealing cavity assembly includes a first sealing cavity, a second sealing cavity and a third sealing cavity arranged in sequence along the axial direction, the first sealing cavity and the third sealing cavity are axially fastened by a first cavity fastening screw, the second sealing cavity is limited between the first sealing cavity and the third sealing cavity, and the first sealing cavity and the connecting false shaft are fastened by a second cavity fastening screw.

[0010] Furthermore, the locking transmission sleeve includes an inner tapered sleeve and an outer tapered sleeve, which are axially fastened by a transmission sleeve locking screw. The axial spacing between the inner tapered sleeve and the outer tapered sleeve can be adjusted by the transmission sleeve locking screw and the mounting sleeve can be fastened to the connecting fake shaft.

[0011] A method for installing a containerized double-sided staggered labyrinth seal device, wherein the double-sided staggered labyrinth seal device is installed in the following order:

[0012] (1) Fix the sealing chamber assembly and the mounting sleeve on the connecting dummy shaft;

[0013] (2) Place the stator adjustment gasket in the sealing cavity assembly;

[0014] (3) Place a thin metal strip in the radial cavity between the sealing cavity assembly and the mounting sleeve;

[0015] (4) Install the rotor labyrinth teeth and stator labyrinth teeth alternately on the outer periphery of the mounting sleeve and inside the sealing cavity assembly, and ensure that the metal strip is located in the sealing gap;

[0016] (5) Install an axial compression sleeve on the installation sleeve to limit the rotor labyrinth teeth on the connecting sleeve, install the stator axial sleeve and the shaft end gland in the sealing cavity assembly, and fix the shaft end gland on the sealing cavity assembly;

[0017] (6) Install the eccentric piece on the shaft end gland and clamp the eccentric piece in the positioning groove of the mounting sleeve;

[0018] (7) Install the locking transmission sleeve on the mounting sleeve, and fix the mounting sleeve to the connecting dummy shaft through the transmission sleeve locking screw.

[0019] Furthermore, the number of metal strips ranges from 2 6, the preferred number is 3, and the ratio of the thickness of the metal strip to the thickness of the sealing gap is in the range of 0.5 0.9, the preferred value range is 0.7 0.8, after the installation is completed, if the metal strip can be smoothly pulled out from the sealing gap axially from the outside, it can be considered that the sealing device is installed in place.

[0020] The advantages and beneficial effects of the present invention are

[0021] 1) The containerized labyrinth seal structure designs the rotor teeth and stator teeth of the double-sided staggered labyrinth seal into sealing units that can be axially overlapped and installed in sequence, and realizes the reliable positioning of the rotor assembly and the stator assembly through a detachable connection dummy shaft and an eccentric piece. On the one hand, it avoids the inconvenience of disassembly and assembly and the increase of leakage channels caused by the traditional double-sided staggered labyrinth seal that requires the stator assembly to be designed as an upper and lower petal structure for installation. On the other hand, it can ensure the installation accuracy of the sealed rotor and stator before leaving the factory, avoiding additional assembly errors caused by on-site assembly.

[0022] 2) During assembly, a metal strip of a certain thickness is installed in the sealing gap between the rotor teeth and the stator teeth, and whether the metal strip can be easily pulled out from the sealing gap is used to determine whether the minimum installation sealing gap meets the standard. This can ensure that the installation accuracy of the double-sided staggered labyrinth seal meets the standard, reduce the probability of rotor-stator friction during seal operation, and suppress airflow vibration.

[0023] (3) Serrated patterns are provided on both side end faces of the rotor labyrinth teeth to provide greater friction and meshing force during assembly and tightening, thereby avoiding movement and slippage between adjacent rotor teeth and improving the reliability and stability of sealing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of the device of the present invention;

[0025] Figure 2 is a schematic diagram of the cross-sectional structure of the rotor assembly;

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the stator assembly;

[0027] Figure 4 It is a schematic diagram of the structure of the sealed cavity section assembly;

[0028] Figure 5 It is a partial enlarged view of the sealing teeth;

[0029] Figure 6 It is a schematic diagram of the end face tooth cross-section structure of the rotor labyrinth tooth.

[0030] In the figure: 1. rotor assembly; 11. rotor labyrinth teeth; 111. first auxiliary sealing ring; 112. first end face teeth; 113. second end face teeth; 12. mounting sleeve; 122. mounting sleeve positioning groove; 13. axial compression sleeve; 14. locking transmission sleeve; 141. inner tapered sleeve; 142. outer tapered sleeve; 143. transmission sleeve locking screw; 2. stator assembly; 21. stator labyrinth teeth; 211. second auxiliary sealing ring; 22. shaft end gland; 23. stator axial sleeve; 24. stator adjustment gasket; 3. sealing cavity assembly; 31. first sealing cavity; 32. second sealing cavity; 33. third sealing cavity; 34. first cavity fastening screw; 35. second cavity fastening screw; 4. dynamic and stator connecting parts; 41. eccentric piece; 42. connecting dummy shaft; 5. metal strip; 6. sealing gap. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the term "comprising" and any of its variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or components is not necessarily limited to those steps or components clearly listed, but may include other steps or components that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] In the present application, the terms "inside", "outside", "radial", "axial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements, or components to a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "inside" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the present application may be understood based on the specific circumstances.

[0034] In addition, the terms "installed" and "provided with" should be understood in a broad sense. For example, it can be fixed installation, detachable installation, or integral structure; it can be contact installation, or placing elements or components in corresponding positions. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Example 1

[0036] like Figure 1 As shown, a containerized double-sided staggered labyrinth sealing device includes a rotor assembly 1, a stator assembly 2, a sealing cavity assembly 3 and a dynamic and stator connector 4, the dynamic and stator connector 4 is used to fix the rotor assembly 1 and the stator assembly 2, the rotor assembly 1 includes a rotor labyrinth tooth 11, a mounting sleeve 12, an axial pressing sleeve 13 and a locking transmission sleeve 14, the stator assembly 2 includes a stator labyrinth tooth 21 and a shaft end pressure cover 22, the locking transmission sleeve 14 fixes the mounting sleeve 12 on the connecting dummy shaft 42, and a group of stator labyrinth teeth 21 connected in sequence are fixed in the sealing cavity assembly 3 through the shaft end pressure cover 22, as shown in FIG. Figure 5 As shown, a sealing gap 6 is formed between the rotor labyrinth teeth 11 and the stator labyrinth teeth 21, and a metal thin strip (5) is provided at the sealing gap (6).

[0037] like Figure 1 , 2As shown, a first auxiliary sealing ring 111 is provided between the rotor labyrinth teeth 11 and the mounting sleeve 12 in the rotor assembly 1 in the radial direction, wherein the material of the first auxiliary sealing ring 111 is selected from rubber or polytetrafluoroethylene with strong elasticity, heat resistance and wear resistance according to the working conditions, and the size is determined according to the radial clearance between the mounting sleeve 12 and the rotor labyrinth teeth 11, and is used to prevent leakage and ensure stable assembly. The axial compression sleeve 13 fixes a group of rotor labyrinth teeth 11 connected in sequence to the mounting sleeve 12 by applying axial force to ensure stable installation. The locking transmission sleeve 14 includes an inner tapered sleeve 141 and an outer tapered sleeve 142, and the inner tapered sleeve 141 and the outer tapered sleeve 142 are axially fastened by a transmission sleeve locking screw 143. The axial spacing can be changed by adjusting the transmission sleeve locking screw 143, and the mounting sleeve 12 is installed on the connecting false shaft 42, wherein the cone angle of the inner tapered sleeve 141 is 5°-10°, and the cone angle of the outer tapered sleeve 142 is 8°-12°, and the specific size is adapted according to the shaft diameter and load.

[0038] like Figure 6 As shown, a first end face tooth 112 and a second end face tooth 113 are provided on both sides of each rotor labyrinth tooth 11. The second end face tooth 113 of the rotor labyrinth tooth 11 meshes with the first end face tooth 112 of the adjacent rotor labyrinth tooth 11 to ensure the transmission of the adjacent rotor labyrinth teeth. The tooth thickness and tooth height are selected according to the equipment speed, pressure and sealing requirements to reduce vibration and improve the stability of movement.

[0039] like Figure 1 , 4 As shown, the sealed cavity assembly 3 is sequentially arranged with a first sealed cavity 31, a second sealed cavity 32, and a third sealed cavity 33 in the axial direction, and the first sealed cavity 31 and the third sealed cavity 33 are axially fixed with a first cavity fastening screw 34. The first sealed cavity 31 and the connecting pseudo shaft 42 are fastened with a second cavity fastening screw 35. There are 5 first cavity fastening screws 34 and 5 second cavity fastening screws 35, which are staggered in the circumferential direction to ensure radial positioning and overall stability.

[0040] like Figure 1 , 3As shown, the stator labyrinth teeth 21 of the stator assembly 2 and the sealing cavity assembly 3 are radially sealed by the second auxiliary sealing ring 211, which is made of the same material as the first auxiliary sealing ring 111, and the size is set according to the radial clearance between the sealing cavity assembly 3 and the stator labyrinth teeth 21. A stator adjustment gasket 24 is axially arranged between the stator labyrinth teeth 21 and the sealing cavity assembly 3 to adjust the position of the labyrinth teeth. The preferred range of its thickness size is 0.5-2mm, and a variety of specifications are prepared with a step difference of 0.5mm, which can be adjusted according to the specific needs of the equipment. A stator axial sleeve 23 is axially arranged between the stator labyrinth teeth 21 and the shaft end pressure cover 22 to ensure axial positioning and smooth operation. The shaft end pressure cover 22 fixes the stator labyrinth teeth 21 to the sealing cavity assembly 3, and the radial size is adapted according to the cavity, and the number of threaded holes can be arranged according to the tightening requirements.

[0041] like Figure 1 As shown, the dynamic and stator connecting member 4 includes an eccentric piece 41 and a connecting dummy shaft 42, wherein the eccentric piece 41 is a high-strength alloy steel sheet with a thickness of 2-4 mm and an eccentricity of 0.5-1.5 mm, one end of which is fixed to the shaft end gland 22, and the other end is clamped in the mounting sleeve positioning groove 122 on the outer surface of the mounting sleeve (12) to achieve axial positioning of the rotor assembly 1 and the stator assembly 2. The connecting dummy shaft 42 is respectively fixed to the mounting sleeve 12 and the sealing cavity assembly 3 to achieve radial positioning of the rotor assembly 1 and the stator assembly 2, and its radial dimension is determined according to the diameter of the main shaft of the equipment, and the axial dimension should exceed the sealing device to facilitate pre-installation and assembly with the main shaft of the equipment.

[0042] The installation method is as follows:

[0043] The installation process is divided into two parts: pre-installation and actual on-site installation. The pre-installation method is:

[0044] (1) Fix the sealing chamber assembly 3 and the mounting sleeve 12 on the connecting dummy shaft 42;

[0045] (2) A stator adjustment gasket 24 of appropriate thickness is placed in the sealing cavity assembly 3 to adjust the stator labyrinth teeth 21; (3) A metal strip 5 with a thickness of 0.28 mm and a width of 10 mm is evenly distributed at 120° in the radial direction in the cavity between the sealing cavity assembly 3 and the mounting sleeve 12. The metal strips 5 are evenly distributed at 120° in the circumferential direction. There are three metal strips in total. The thickness-to-gap ratio is 0.7 to ensure that the gap value of the sealing gap 6 is 0.4 mm;

[0046] (4) The rotor labyrinth teeth 11 and the stator labyrinth teeth 21 are installed alternately on the outer periphery of the mounting sleeve 12 and inside the sealing cavity assembly 3, and the thin copper strip 5 must be located in the sealing gap 6;

[0047] (5) Install the axial compression sleeve 13 on the installation sleeve 12 to fix the rotor labyrinth tooth 11 on the connecting sleeve 12, install the stator axial sleeve 23 and the shaft end gland 22 in the sealing cavity assembly 3, and fix the shaft end gland 22 on the sealing cavity assembly 3;

[0048] (6) Install the eccentric piece 41 on the shaft end gland 22, and clamp the eccentric piece 41 in the mounting sleeve positioning groove 122 to ensure the axial positioning between the rotor assembly 1 and the stator assembly 2;

[0049] (7) Install the locking transmission sleeve 14 on the mounting sleeve 12, and fix the mounting sleeve 12 to the connecting dummy shaft 42 by means of the transmission sleeve locking screw 143; (8) After the installation is completed, if the thin copper strip 5 can be smoothly pulled out from the sealing gap 6 along the axial direction from the outside, it can be considered that the sealing device is installed in place.

[0050] On-site installation method:

[0051] (1) Remove the connecting dummy shaft 42;

[0052] (2) The sealing device is inserted into the main shaft of the equipment (such as a steam turbine), fixed to the steam turbine casing at the end away from the equipment, and fixed to the main shaft by locking the transmission sleeve 14 at the end close to the equipment;

[0053] (3) Remove the eccentric piece 41;

[0054] (4) During operation and debugging, if the equipment does not experience any phenomenon such as tooth sticking, severe vibration or abnormal noise, it can be considered that the sealing device is installed in place.

[0055] The above description is only the preferred embodiment of the present application and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, 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 containerized double-sided staggered labyrinth sealing device, characterized in that: The invention comprises a rotor assembly (1), a stator assembly (2), a sealing chamber assembly (3) and a dynamic-stator connecting member (4); the rotor assembly (1) comprises a rotor labyrinth tooth (11), a mounting sleeve (12), an axially pressing sleeve (13) and a locking transmission sleeve (14); the stator assembly (2) comprises a stator labyrinth tooth (21) and a shaft end gland (22); the dynamic-stator connecting member (4) comprises an eccentric piece (41) and a connecting dummy shaft (42); a group of rotor labyrinth teeth (11) connected in sequence are axially pressed by the axially pressing sleeve (13) and are limited on the mounting sleeve (12); the locking transmission sleeve (14) fixes the mounting sleeve (12) on the connecting dummy shaft (42); The stator labyrinth teeth (21) connected in sequence are fixed in a sealing cavity assembly (3) via a shaft end pressure cover (22); the rotor labyrinth teeth (11) and the stator labyrinth teeth (21) are arranged alternately to form a sealing gap (6); the eccentric piece (41) is fixed on the shaft end pressure cover (22) and clamped in a mounting sleeve positioning groove (122) on the outer surface of the mounting sleeve (12) to achieve axial positioning of the rotor assembly (1) and the stator assembly (2); the connecting dummy shaft (42) is respectively fixed to the mounting sleeve (12) and the sealing cavity assembly (3) to achieve radial positioning of the rotor assembly (1) and the stator assembly (2); and a metal thin strip (5) is provided at the sealing gap (6).

2. A containerized double-sided staggered labyrinth seal device according to claim 1, characterized in that: A first auxiliary sealing ring (111) is provided radially between the rotor labyrinth tooth (11) and the mounting sleeve (12); both side end faces of each rotor labyrinth tooth (11) are provided with a first end face tooth (112) and a second end face tooth (113); the second end face tooth (113) of the rotor labyrinth tooth (11) meshes with the first end face tooth (112) of an adjacent rotor labyrinth tooth (11) to ensure transmission between adjacent rotor labyrinth teeth (11).

3. A containerized double-sided staggered labyrinth seal device according to claim 2, characterized in that: A second auxiliary sealing ring (211) is provided radially between the stator labyrinth tooth (21) and the sealing cavity assembly (3), a stator axial sleeve (23) is provided axially between the stator labyrinth tooth (21) and the shaft end pressure cover (22), and a stator adjustment gasket (24) for adjusting the axial position of the stator labyrinth tooth (21) is provided axially between the stator labyrinth tooth (21) and the sealing cavity assembly (3).

4. The containerized double-sided staggered labyrinth seal device according to claim 3, characterized in that: The sealed cavity assembly (3) comprises a first sealed cavity (31), a second sealed cavity (32) and a third sealed cavity (33) which are arranged in sequence along the axial direction; the first sealed cavity (31) and the third sealed cavity (33) are axially fastened by a first cavity fastening screw (34); the second sealed cavity (32) is limited between the first sealed cavity (31) and the third sealed cavity (33); and the first sealed cavity (31) and the connecting dummy shaft (42) are fastened by a second cavity fastening screw (35).

5. The containerized double-sided staggered labyrinth seal device according to claim 4, characterized in that: The locking transmission sleeve (14) comprises an inner tapered sleeve (141) and an outer tapered sleeve (142). The inner tapered sleeve (141) and the outer tapered sleeve (142) are axially fastened by a transmission sleeve locking screw (143). The axial spacing between the inner tapered sleeve (141) and the outer tapered sleeve (142) can be adjusted by the transmission sleeve locking screw (143) and the mounting sleeve (12) is fastened to the connecting dummy shaft (42).

6. A method for installing a containerized double-sided staggered labyrinth seal according to claim 5, characterized in that: Install the double-sided staggered labyrinth seal in the following order: 1) Fixing the sealing chamber assembly (3) and the mounting sleeve (12) on the connecting dummy shaft (42); 2) Place the stator adjustment gasket (24) into the sealing cavity assembly (3); 3) placing a metal strip (5) in the radial cavity between the sealing cavity assembly (3) and the mounting sleeve (12); 4) The rotor labyrinth teeth (11) and the stator labyrinth teeth (21) are alternately installed on the outer periphery of the mounting sleeve (12) and inside the sealing chamber assembly (3), and the metal strip (5) must be ensured to be located within the sealing gap (6); 5) Installing an axial compression sleeve (13) on the installation sleeve (12) to limit the rotor labyrinth teeth (11) on the connecting sleeve (12), installing a stator axial sleeve (23) and a shaft end gland (22) in the sealing chamber assembly (3), and fixing the shaft end gland (22) on the sealing chamber assembly (3); 6) Install the eccentric piece (41) on the shaft end gland (22), and fit the eccentric piece (41) into the mounting sleeve positioning groove (122); 7) Install the locking transmission sleeve (14) on the installation sleeve (12), and fix the installation sleeve (12) and the connecting dummy shaft (42) by means of the transmission sleeve locking screw (143).

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