Spherical differential self-aligning mechanical sealing device

Abstract

The utility model belongs to the technical field of mechanical sealing, and discloses a spherical differential-diameter self-aligning mechanical sealing device which comprises a shell, a shaft sleeve is rotatably connected to the middle of the shell, a static body is fixedly installed on one surface of the shell, the static body is connected to the outer surface of the shaft sleeve in a sleeved mode, and a movable body is connected to the outer surface of the static body in a sealed mode. A sealing contact surface between the static body and the movable body is arranged to be a spherical surface, one end of the movable body is fixedly provided with a top-connection compensation assembly, and the top-connection compensation assembly is fixedly connected to the outer surface of the shaft sleeve in a sleeving mode; the self-aligning mechanical seal is simple in overall structure, self-aligning can be achieved through spherical surface contact, the sealing effect is improved, the service life of the mechanical seal is prolonged, and the using effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals, in particular to a spherical surface differential diameter self-aligning mechanical seal device. Background Art

[0002] A mechanical seal is a shaft sealing device used in rotating fluid machinery. Due to its advantages such as low leakage and long service life, it is widely used in various types of rotating fluid machinery. It is a device that relies on the end faces of the static ring and the dynamic ring to be pressed tightly, and achieves axial end face sealing under the action of fluid pressure and the spring force of the compensation mechanism.

[0003] Mechanical seals can improve machine efficiency, reduce energy consumption, reduce internal leakage, external leakage and penetration of the machine, increase the volumetric efficiency of the machine, reduce friction loss, and improve the mechanical efficiency of the machine by improving the sealing method (such as changing the double-end face seal to a single-end face seal, changing the unbalanced type to a balanced type, etc.); the leakage and life of the shaft seal directly affect the reliability of the shaft seal and the machine, and reduce environmental pollution and safety hazards caused by leakage.

[0004] The crystallizer is a kind of rotary fluid machinery, which is mostly used in the glucose crystallization industry. The existing technology mostly adopts mechanical seals to seal the crystallizer and the stirring center shaft. However, the sugar paste in the crystallizer is very viscous, the solid grains are small and have high hardness, and the circular runout of the crystallizer center shaft is large, so the existing mechanical seals are prone to leakage after a few months and have a short service life.

[0005] A Chinese patent application number CN2020107749952 discloses a V-type mechanical seal device, comprising a housing, a shaft sleeve rotatably arranged in the housing, a dynamic sealing device arranged between the housing and the shaft sleeve, the dynamic sealing device comprising a static body fixedly mounted on the housing and a dynamic body sleeved on the shaft sleeve, the contact surface between the static body and the dynamic body is a conical surface, the static body and the dynamic body are sealed by friction contact, and a top compensation component for constantly compensating for the wear gap between the static body and the dynamic body is provided at the rear of the dynamic body. The present invention can be used to seal the connection between the stirring center shaft and the crystallizer, making the crystallizer less likely to leak sugar, greatly improving the hygiene of the production site, and the overall structure is simple, easy to use, maintenance-free, and has a long overall service life, effectively reducing the labor intensity of workers, thereby greatly reducing the cost of use and improving the economic benefits of the enterprise;

[0006] However, during use, the sealing base of this patent is in contact with the sealing cone hole, wherein the sealing base is located on the static body and the sealing cone hole is located on the dynamic body. During long-term use, the sealing base of the mechanical seal wears out quickly and cannot adjust itself automatically. At the same time, due to the influence of processing errors, uneven wear occurs, which affects the service life of the mechanical seal. Utility Model Content

[0007] The main technical problem to be solved by the utility model is to provide a spherical surface difference diameter self-aligning mechanical seal device with a simple overall structure, which can realize automatic centering through spherical contact during use, thereby increasing the sealing effect, extending the service life of the mechanical seal, and improving the use effect.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A spherical surface difference diameter self-aligning mechanical seal device comprises a housing, a shaft sleeve being rotatably connected at a middle position of the housing, a static body being fixedly mounted on one surface of the housing, the static body being sleeved on the outer surface of the shaft sleeve, a dynamic body being sealingly connected to the outer surface of the static body, the sealing contact surface between the static body and the dynamic body being set as a spherical surface, a top compensation assembly being fixedly mounted on one end of the dynamic body, the top compensation assembly being fixedly sleeved on the outer surface of the shaft sleeve;

[0010] The static body includes a mounting plate fixedly mounted on the housing, a mounting base is provided at one end of the mounting plate away from the housing, a sealing base is provided at the end of the mounting base, and an outer surface of the sealing base is provided as a spherical surface;

[0011] The moving body includes a mounting body, a sealing body is fixedly mounted inside the mounting body, and a first sealing spherical hole and a second sealing spherical hole are sequentially provided at a position where the sealing body contacts the outer surface of the sealing base in a sealing manner;

[0012] The spherical diameter of the spherical surface of the sealing base corresponds to the spherical diameter of the first sealing spherical hole and the spherical diameter of the second sealing spherical hole.

[0013] The following is a further optimization of the above technical solution by the present invention:

[0014] A positioning plate is provided at one end of the sleeve, a plurality of positioning holes are provided in a circular array at a position on the outer surface of the sleeve away from the positioning plate, and an intermediate hole is provided inside the sleeve;

[0015] A plurality of first sealing grooves arranged at intervals are opened on the inner wall of the middle hole, and a first sealing ring is placed in each of the plurality of first sealing grooves.

[0016] Further optimization: a second sealing groove is opened on the end surface of the housing close to the positioning plate and close to the edge, and a second sealing ring is placed in the second sealing groove;

[0017] A plurality of mounting holes are provided in an annular array on the end surface of the housing close to the positioning plate and close to the second sealing groove;

[0018] A process mounting bracket is fixedly mounted on the end surface of the shell away from the positioning plate and at a position corresponding to the second sealing groove.

[0019] Further optimization: a common center hole is opened between the mounting plate and the mounting base, the static body is sleeved on the outer surface of the shaft sleeve through the center hole, a third sealing groove is opened on the end surface of the mounting plate close to the shell and close to the center hole, and a third sealing ring is placed in the third sealing groove;

[0020] There are multiple elastic pads in a circular array near the edge of the mounting plate;

[0021] A fourth sealing groove is provided on the inner wall of the center hole, a fourth sealing ring is placed in the fourth sealing groove, and the fourth sealing ring is in contact with the outer surface of the shaft sleeve at the same time.

[0022] Further optimization: a sealing straight hole is provided in the sealing body near the second sealing spherical hole, a fifth sealing groove is provided on the inner wall of the sealing straight hole, a fifth sealing ring is placed in the fifth sealing groove, the moving body is sleeved on the outer surface of the sleeve through the sealing straight hole, and the fifth sealing ring is sealed and connected to the outer surface of the sleeve.

[0023] Further optimization: a top plate is fixedly installed at one end of the mounting body close to the first sealing spherical hole, and a guide rod is connected to one end of the mounting body away from the first sealing spherical hole.

[0024] Further optimization: the top connection compensation assembly includes a fixed ring fixedly sleeved at one end of the outer surface of the sleeve away from the shell.

[0025] Further optimization: A process plate is sleeved on the outer surface of the sleeve, the process plate is located between the moving body and the fixed ring and is top-connected to one end face of the fixed ring, and a plurality of process bolts are arranged in a circular array near the edge of the process plate, and the plurality of process bolts are simultaneously threadedly connected to the process mounting frame.

[0026] Further optimization: a movable ring is sleeved on the outer surface of the sleeve near the mounting body, and the guide rod also passes through the movable ring. A compression spring is fixedly installed on the end surface of the movable ring close to the top plate, and the other end of the compression spring is connected to the top plate.

[0027] Further optimization: the fixed ring has a plurality of connecting rods in an annular array, the plurality of connecting rods are connected to the fixed ring through threads, and the plurality of connecting rods simultaneously penetrate the process plate and are connected to the movable ring;

[0028] The top connecting rod is simultaneously threadedly connected with a locking nut.

[0029] The present invention adopts the above technical solution, which is ingenious in conception and reasonable in structure. It can be used to seal the connection between the stirring center shaft and the crystallizer, making the crystallizer less likely to leak sugar, greatly improving the hygiene of the production site, and the overall structure is simple, easy to use, maintenance-free, and has a long overall service life, effectively reducing the labor intensity of workers, thereby greatly reducing the cost of use and improving the economic benefits of the enterprise.

[0030] At the same time, the sealing surface between the static body and the dynamic body is set to a spherical surface, so that the dynamic sealing effect between the dynamic body and the static body is further improved when the dynamic body rotates. At the same time, during the rotation of the dynamic body, the tolerance between the first sealing spherical hole and the second sealing spherical hole can gradually tend to balance, thereby improving the sealing effect and extending the service life.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present utility model;

[0033] Figure 2 This is a schematic structural diagram of the static body in Example 1 of the present utility model;

[0034] Figure 3 This is a schematic structural diagram of the moving body in Example 1 of the present utility model;

[0035] Figure 4 This is a schematic structural diagram of the moving body in Example 2 of the present utility model.

[0036] In the figure: 1. Bushing; 11. Middle hole; 12. First sealing groove; 13. First sealing ring; 14. Positioning plate; 15. Positioning hole; 2. Housing; 21. Second sealing groove; 22. Second sealing ring; 23. Mounting hole; 24. Process mounting bracket; 25. Process bolt; 3. Stationary body; 31. Third sealing groove; 32. Third sealing ring; 33. Mounting plate; 34. Elastic pad; 35. Mounting base; 36. Sealing base; 37. Center hole; 38. Fourth sealing groove; 39. Fourth sealing ring; 4. Dynamic body Body; 41. Mounting body; 42. Top plate; 43. Guide rod; 44. Sealing body; 46. First positioning bolt; 47. First sealing spherical hole; 48. Second sealing spherical hole; 480. Third sealing spherical hole; 481. Fourth sealing spherical hole; 49. Sealing straight hole; 490. Fifth sealing groove; 491. Fifth sealing ring; 5. Top connection compensation assembly; 51. Fixing ring; 52. Process plate; 53. Second positioning bolt; 54. Locking nut; 55. Top connection rod; 56. Movable ring; 57. Compression spring. DETAILED DESCRIPTION

[0037] Example 1: Figure 1-3 The figure shows a spherical surface difference self-aligning mechanical seal device, comprising a housing 2, a shaft sleeve 1 being rotatably connected to the middle position of the housing 2, a stationary body 3 being fixedly mounted on one surface of the housing 2, the stationary body 3 being sleeved on the outer surface of the shaft sleeve 1, a moving body 4 being sealingly connected to the outer surface of the stationary body 3, the sealing contact surface between the stationary body 3 and the moving body 4 being set as a spherical surface, a top compensation component 5 being fixedly mounted on one end of the moving body 4, the top compensation component 5 being fixedly sleeved on the outer surface of the shaft sleeve 1;

[0038] The static body 3 includes a mounting plate 33 fixedly mounted on the housing 2. A mounting base 35 is provided at one end of the mounting plate 33 away from the housing 2. A sealing base 36 is provided at the end of the mounting base 35. The outer surface of the sealing base 36 is provided as a spherical surface.

[0039] The moving body 4 includes a mounting body 41, a sealing body 44 is fixedly mounted inside the mounting body 41, and a first sealing spherical hole 47 and a second sealing spherical hole 48 are sequentially provided in the sealing body 44 at a position in sealing contact with the outer surface of the sealing base 36;

[0040] The spherical diameter of the spherical surface of the sealing base 36 corresponds to the spherical diameter of the first sealing spherical hole 47 and the spherical diameter of the second sealing spherical hole 48 .

[0041] like Figure 1 As shown, a positioning plate 14 is provided at one end of the sleeve 1 , and a plurality of positioning holes 15 are provided in a circular array at a position on the outer surface of the sleeve 1 away from the positioning plate 14 , and each of the positioning holes 15 is threadedly connected with a top screw.

[0042] A middle hole 11 is provided inside the shaft sleeve 1 , and the shaft sleeve 1 is sleeved on the central shaft of the crystallizer through the middle hole 11 .

[0043] The top screw in the positioning hole 15 is simultaneously connected to the central rotating shaft of the crystallizer. With this design, the sleeve 1 can be fixedly mounted on the central rotating shaft of the crystallizer and rotate along with the central rotating shaft.

[0044] A plurality of first sealing grooves 12 arranged at intervals are formed on the inner wall of the middle hole 11 , and a first sealing ring 13 is placed in each of the plurality of first sealing grooves 12 . This design enhances the sealing between the sleeve 1 and the central shaft of the crystallizer.

[0045] A second sealing groove 21 is formed on the end surface of the housing 2 close to the positioning plate 14 and close to the edge thereof. A second sealing ring 22 is placed in the second sealing groove 21 .

[0046] A plurality of mounting holes 23 are provided in an annular array on the end surface of the housing 2 close to the positioning plate 14 and close to the second sealing groove 21 .

[0047] The first bolt is inserted into the mounting hole 23, that is, the housing 2 is fixedly mounted on the crystallizer housing by the first bolt, and the second sealing ring 22 is in close contact with the crystallizer housing to seal the housing 2 and the crystallizer housing.

[0048] A through hole is provided in the middle of the housing 2 , that is, the housing 2 is sleeved on the outer surface of the shaft sleeve 1 through the through hole, and the shaft sleeve 1 rotates in the through hole of the housing 2 .

[0049] A process mounting bracket 24 is fixedly mounted on the end surface of the housing 2 away from the positioning plate 14 and at a position corresponding to the second sealing groove 21 .

[0050] like Figure 2 As shown, a central hole 37 is defined between the mounting plate 33 and the mounting base 35 . The stationary body 3 is sleeved on the outer surface of the sleeve 1 through the central hole 37 , and the sleeve 1 rotates in the central hole 37 .

[0051] A third sealing groove 31 is formed on the end surface of the mounting plate 33 close to the housing 2 and close to the center hole 37 , and a third sealing ring 32 is placed in the third sealing groove 31 .

[0052] The mounting plate 33 is provided with a plurality of elastic pads 34 in a circular array near the edge thereof, and a second bolt is inserted into each of the plurality of elastic pads 34 .

[0053] The static body 3 is fixedly mounted on the housing 2 by a second bolt. Meanwhile, the third sealing ring 32 is in contact with the housing 2 , thus completing the sealing between the static body 3 and the housing 2 .

[0054] In this embodiment 1, the second bolt and the elastic pad 34 are softly connected, so that the static body 3 can float slightly on the shell 2, which is used to automatically adjust the circular runout of the stirring center axis of the crystallizer, improve the sealing effect and extend the service life.

[0055] A fourth sealing groove 38 is formed on the inner wall of the central hole 37 , and a fourth sealing ring 39 is placed in the fourth sealing groove 38 .

[0056] The fourth sealing ring 39 is also in contact with the outer surface of the sleeve 1 . This design improves the sealing between the outer surface of the sleeve 1 and the stationary body 3 and prevents the paste from entering between the sleeve 1 and the stationary body 3 .

[0057] like Figure 3 As shown, a sealing straight hole 49 is provided in the sealing body 44 near the second sealing spherical hole 48 .

[0058] A fifth sealing groove 490 is formed on the inner wall of the sealing straight hole 49 , and a fifth sealing ring 491 is placed in the fifth sealing groove 490 .

[0059] The moving body 4 is sleeved on the outer surface of the sleeve 1 through the sealing straight hole 49, and the fifth sealing ring 491 is sealed and connected to the outer surface of the sleeve 1, thereby improving the sealing performance between the moving body 4 and the outer surface of the sleeve 1.

[0060] A top plate 42 is fixedly mounted on one end of the mounting body 41 close to the first sealing spherical hole 47 , and a guide rod 43 is connected to one end of the mounting body 41 away from the first sealing spherical hole 47 .

[0061] There are multiple first positioning bolts 46 in a circular array at the middle position of the mounting body 41, and threaded holes are opened at positions corresponding to the first positioning bolts 46 on the sealing body 44, that is, multiple first positioning bolts 46 are threadedly connected in the corresponding threaded holes at the same time, fixing the mounting body 41 on the outer surface of the sealing body 44.

[0062] With this design, when the moving body 4 rotates, the first and second sealing spherical holes 47, 48 of the moving body 4 rotate on the surface of the sealing base 36 to form a dynamic seal, because the spherical diameter of the sealing base 36 corresponds to the spherical diameter of the first and second sealing spherical holes 47, 48, respectively. This prevents leakage of the paste, and the use of spherical sealing contact can improve the sealing effect and extend the service life.

[0063] At the same time, due to the existence of processing tolerances, there is a tolerance between the ball diameter of the first sealing spherical hole 47 and the ball diameter of the second sealing spherical hole 48, and this tolerance can automatically tend to balance during the rotation and running-in process of the moving body 4, thereby improving the fit between the first sealing spherical hole 47 and the second sealing spherical hole 48 and the sealing base 36, respectively, and extending the service life.

[0064] After long-term use, the walls of the first sealing spherical hole 47 and the second sealing spherical hole 48 are worn. At this time, the moving body 4 automatically adjusts and compensates under the action of the top-contact compensation component 5, so that the inner walls of the second sealing spherical hole 48 and the first sealing spherical hole 47 are in contact with the sealing base 36 and maintain contact and sealing, further improving the sealing effect.

[0065] like Figure 1 As shown, the top contact compensation assembly 5 includes a fixing ring 51 fixedly sleeved on one end of the outer surface of the sleeve 1 away from the housing 2, and a plurality of second positioning bolts 53 are arranged in an annular array at positions corresponding to the fixing ring 51 on the sleeve 1.

[0066] The fixing ring 51 is fixedly sleeved on the outer surface of the shaft sleeve 1 through a plurality of second positioning bolts 53 and rotates along with the shaft sleeve 1 .

[0067] A process plate 52 is sleeved on the outer surface of the shaft sleeve 1 . The process plate 52 is located between the moving body 4 and the fixing ring 51 and is in contact with one end surface of the fixing ring 51 .

[0068] The process plate 52 has a plurality of process bolts 25 arranged in a circular array near the edge thereof. The plurality of process bolts 25 are simultaneously threadedly connected to the process mounting frame 24 .

[0069] The function of the process bolts 25 is to facilitate the installation of the mechanical sealing device. When the housing 2 is sleeved on the shaft sleeve 1, it is initially locked by the process bolts 25. When the mechanical sealing device is in operation, multiple process bolts 25 can be removed, thereby increasing the installation efficiency of the device and facilitating use.

[0070] A movable ring 56 is sleeved on the outer surface of the sleeve 1 near the mounting body 41 , and the guide rod 43 also passes through the movable ring 56 , that is, the movable ring 56 can move along the direction of the guide rod 43 .

[0071] A compression spring 57 is fixedly mounted on the end surface of the movable ring 56 close to the top plate 42 , and the other end of the compression spring 57 is connected to the top plate 42 .

[0072] A guide shaft is provided at a position on the top plate 42 corresponding to the compression spring 57 . The compression spring 57 is sleeved on the guide shaft, and a gap is provided between the other end surface of the guide shaft and the movable ring 56 .

[0073] The fixed ring 51 has a plurality of connecting rods 55 in a circular array. The plurality of connecting rods 55 are connected to the fixed ring 51 by threads. The plurality of connecting rods 55 simultaneously penetrate the process plate 52 and connect with the movable ring 56 .

[0074] With this design, when the sleeve 1 rotates along with the central axis of the crystallizer, it drives the fixed ring 51 to rotate, and the multiple connecting rods 55 drive the movable ring 56 to rotate, which in turn drives the moving body 4 to rotate on the surface of the sealing base 36 to form a dynamic seal.

[0075] The jacking rod 55 is also threadedly connected with a locking nut 54 , and the locking nut 54 can fix the position of the jacking rod 55 .

[0076] When in use, the mechanical sealing device is installed on the central axis of the crystallizer, and the top connecting rod 55 is rotated to make the movable ring 56 contact with the moving body 4, and the compression spring 57 is in a compressed state to ensure that the first sealing spherical hole 47 and the second sealing spherical hole 48 of the moving body 4 are in sealing contact with the sealing base 36, and the locking nut 54 is locked to fix the position of the top connecting rod 55.

[0077] When the central shaft of the crystallizer rotates and stirs, the sleeve 1 rotates along with the central shaft. Under the action of the first sealing ring 13, the paste in the crystallizer will not flow out from between the sleeve 1 and the central shaft. When the paste flows to the position between the housing 2 and the static body 3, the second sealing ring 22, the third sealing ring 32 and the fourth sealing ring 39 seal the paste and prevent it from flowing out of the housing 2 and the connection between the housing 2 and the static body 3.

[0078] With long-term use, the fourth sealing ring 39 wears out faster due to the relative movement between the static body 3 and the sleeve 1. When the fourth sealing ring 39 wears out, the paste flows out from between the static body 3 and the sleeve 1. At this time, the contact seals at the first sealing spherical hole 47 and the second sealing spherical hole 48 take effect respectively. During this period, since the sealing base 36 adopts spherical contact with the first sealing spherical hole 47 and the second sealing spherical hole 48 respectively, the sealing effect is improved and the service life of the device is extended; and under the sealing action of the fifth sealing ring 491, the sealing effect is further improved.

[0079] When the inner walls of the first sealing spherical hole 47 and the second sealing spherical hole 48 are worn, the compression spring 57 keeps the inner walls of the first sealing spherical hole 47 and the second sealing spherical hole 48 of the moving body 4 in a sealed contact state with the sealing base 36, thereby extending the service life.

[0080] Example 2: Figure 4 As shown, based on Example 1, a third sealing spherical hole 480 and a fourth sealing spherical hole 481 are provided in the sealing body 44 at the sealing contact position with the outer surface of the sealing base 36 and close to the first sealing spherical hole 47 and the second sealing spherical hole 48. The spherical diameters of the third sealing spherical hole 480 and the fourth sealing spherical hole 481 match the spherical diameter of the spherical surface of the sealing base 36.

[0081] The hole walls of the third sealing spherical hole 480 and the fourth sealing spherical hole 481 have the same sealing effect as the hole walls of the first sealing spherical hole 47 and the second sealing spherical hole 48 , which can increase the sealing time and extend the service life.

[0082] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spherical surface difference diameter self-aligning mechanical seal device, comprising a housing (2), characterized in that: The housing (2) is rotatably connected to a shaft sleeve (1) at a middle position, a static body (3) is fixedly mounted on one surface of the housing (2), the static body (3) is sleeved on the outer surface of the shaft sleeve (1), a dynamic body (4) is sealingly connected to the outer surface of the static body (3), the sealing contact surface between the static body (3) and the dynamic body (4) is set as a spherical surface, a top compensation component (5) is fixedly mounted on one end of the dynamic body (4), and the top compensation component (5) is fixedly sleeved on the outer surface of the shaft sleeve (1); The static body (3) includes a mounting plate (33) fixedly mounted on the housing (2), a mounting base (35) being provided at one end of the mounting plate (33) away from the housing (2), a sealing base (36) being provided at the end of the mounting base (35), and an outer surface of the sealing base (36) being provided as a spherical surface; The moving body (4) includes a mounting body (41), a sealing body (44) is fixedly mounted inside the mounting body (41), and a first sealing spherical hole (47) and a second sealing spherical hole (48) are sequentially provided at a position in the sealing body (44) that is in sealing contact with the outer surface of the sealing base (36); The spherical diameter of the spherical surface of the sealing base (36) corresponds to the spherical diameter of the first sealing spherical hole (47) and the spherical diameter of the second sealing spherical hole (48).

2. The spherical surface difference diameter self-aligning mechanical seal device according to claim 1, characterized in that: A positioning plate (14) is provided at one end of the shaft sleeve (1), a plurality of positioning holes (15) are provided in a circular array at a position of the outer surface of the shaft sleeve (1) away from the positioning plate (14), and a middle hole (11) is provided inside the shaft sleeve (1); A plurality of first sealing grooves (12) arranged at intervals are provided on the inner wall of the middle hole (11), and a first sealing ring (13) is placed in each of the plurality of first sealing grooves (12).

3. The spherical surface difference diameter self-aligning mechanical seal device according to claim 2, characterized in that: A second sealing groove (21) is provided on the end surface of the housing (2) close to the positioning plate (14) and close to the edge thereof, and a second sealing ring (22) is placed in the second sealing groove (21); A plurality of mounting holes (23) are provided in an annular array on an end surface of the housing (2) close to the positioning plate (14) and close to the second sealing groove (21); A process mounting frame (24) is fixedly mounted on the end surface of the housing (2) away from the positioning plate (14) and at a position corresponding to the second sealing groove (21).

4. The spherical surface difference diameter self-aligning mechanical seal device according to claim 3, characterized in that: A common center hole (37) is formed between the mounting plate (33) and the mounting base (35); the stationary body (3) is sleeved on the outer surface of the shaft sleeve (1) through the center hole (37); a third sealing groove (31) is formed on the end surface of the mounting plate (33) close to the housing (2) and close to the center hole (37); a third sealing ring (32) is placed in the third sealing groove (31); A plurality of elastic pads (34) are provided in a circular array near the edge of the mounting plate (33); A fourth sealing groove (38) is provided on the inner wall of the center hole (37), a fourth sealing ring (39) is placed in the fourth sealing groove (38), and the fourth sealing ring (39) is in contact with the outer surface of the shaft sleeve (1).

5. The spherical surface difference diameter self-aligning mechanical seal device according to claim 4, characterized in that: A sealing straight hole (49) is provided in the sealing body (44) near the second sealing spherical hole (48), a fifth sealing groove (490) is provided on the inner wall of the sealing straight hole (49), a fifth sealing ring (491) is placed in the fifth sealing groove (490), the moving body (4) is sleeved on the outer surface of the shaft sleeve (1) through the sealing straight hole (49), and the fifth sealing ring (491) is sealed and connected to the outer surface of the shaft sleeve (1).

6. The spherical surface difference diameter self-aligning mechanical seal device according to claim 5, characterized in that: A top plate (42) is fixedly mounted on one end of the mounting body (41) close to the first sealing spherical hole (47), and a guide rod (43) is connected to one end of the mounting body (41) away from the first sealing spherical hole (47).

7. The spherical surface difference diameter self-aligning mechanical seal device according to claim 6, characterized in that: The top connection compensation assembly (5) comprises a fixing ring (51) fixedly sleeved on the shaft sleeve (1) at an end position away from the outer surface of the housing (2).

8. The spherical surface difference diameter self-aligning mechanical seal device according to claim 7, characterized in that: A process plate (52) is sleeved on the outer surface of the shaft sleeve (1). The process plate (52) is located between the moving body (4) and the fixed ring (51) and is in contact with one end face of the fixed ring (51). A plurality of process bolts (25) are arranged in a circular array near the edge of the process plate (52). The plurality of process bolts (25) are simultaneously threadedly connected to the process mounting frame (24).

9. The spherical surface difference diameter self-aligning mechanical seal device according to claim 8, characterized in that: A movable ring (56) is sleeved on the outer surface of the shaft sleeve (1) at a position close to the mounting body (41), and the guide rod (43) also passes through the movable ring (56). A compression spring (57) is fixedly installed on the end surface of the movable ring (56) close to the top plate (42), and the other end of the compression spring (57) is connected to the top plate (42).

10. The spherical surface difference diameter self-aligning mechanical seal device according to claim 9, characterized in that: The fixed ring (51) has a plurality of top connecting rods (55) in an annular array, the plurality of top connecting rods (55) are connected to the fixed ring (51) by threads, and the plurality of top connecting rods (55) simultaneously penetrate the process plate (52) and are connected to the movable ring (56); The top connecting rod (55) is simultaneously threadedly connected with a locking nut (54).

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