Improved device for mechanical seal of horizontal sand mill

Abstract

The application relates to an improved device for a mechanical seal of a horizontal sand mill, and relates to the field of mechanical manufacturing technology, which comprises a movable ring seat, a spiral pumping ring and a limiting block, the limiting block and the movable ring seat are located at two ends of the spiral pumping ring, an atmosphere-side movable ring and an atmosphere-side static ring are sealingly installed between the movable ring seat and the spiral pumping ring, a medium-side static ring and a medium-side movable ring are sealingly installed between the limiting block and the spiral pumping ring; a pushing ring is installed in the spiral pumping ring, a first O-shaped ring is installed between the pushing ring and the medium-side static ring, a blocking ring is installed between the first O-shaped ring and the medium-side static ring, an inclined step surface is integrally formed on one side of an outer side wall of the medium-side static ring close to the movable ring seat, and the blocking ring is located on the inner side of the inclined step surface. The application can prolong the service life of the mechanical seal and reduce the frequency of replacing the seal of the equipment.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing technology, and in particular to an improved mechanical seal device for a horizontal sand mill. Background Technology

[0002] The mechanical seal used in the horizontal sand mill has a double-end mechanical seal structure. The sealing liquid pressure is 0.2 MPa higher than that of the medium. Its main working principle is as follows: First, the inlet and outlet pipelines of the seal are connected. An appropriate amount of liquid compatible with the medium is injected into the cooling tank, which can be observed through the liquid level sight glass. Then, an appropriate amount of compressed air is added until it reaches about 0.45 MPa. After the rotating shaft rotates, it drives the shaft sleeve to rotate. The sealing liquid is circulated and pressurized by the circulating pump. Under the action of the jerk, the sealing liquid returns to the cooling tank. The friction between the stationary ring and the rotating ring generates a lot of heat. The pressure-holding sealing water can carry this heat into the cooling tank. Cooling water is connected to the outside of the cooling tank pipe to cool the sealing pressure-holding water.

[0003] However, most existing sand mill seals, both domestically and internationally, use a large-plane integrated gold ring structure for the rotating ring. Due to the wide sealing surface of the alloy ring, it is very heavy and expensive, increasing the cost of the seal. The unstable verticality and eccentricity of the rotating ring affect the service life of the mechanical seal, leading to frequent seal replacements and increased maintenance workload. Utility Model Content

[0004] In order to extend the service life of mechanical seals and reduce the frequency of seal replacement, this application provides an improved device for mechanical seals of horizontal sand mills.

[0005] The improved mechanical seal device for a horizontal sand mill provided in this application adopts the following technical solution:

[0006] An improved mechanical seal device for a horizontal sand mill includes a rotating ring seat, a spiral pumping ring, and a limiting block. The limiting block and the rotating ring seat are located at both ends of the spiral pumping ring. An atmospheric rotating ring and an atmospheric stationary ring are sealed between the rotating ring seat and the spiral pumping ring. A medium-side stationary ring and a medium-side rotating ring are sealed between the limiting block and the spiral pumping ring.

[0007] A push ring is installed inside the spiral pumping ring, and a first O-ring is installed between the push ring and the medium-side stationary ring. A retaining ring is installed between the first O-ring and the medium-side stationary ring. An inclined stepped surface is integrally formed on the outer side wall of the medium-side stationary ring near the moving ring seat, and the retaining ring is located inside the inclined stepped surface.

[0008] Preferably, the spiral pumping ring includes a bushing and a gland assembly. The outer wall of the bushing is provided with a pumping annular groove. The gland assembly is coaxially sleeved on the outside of the pumping annular groove. The push ring, the first O-ring, the retaining ring, and the medium-side stationary ring are located inside the gland assembly.

[0009] The inner wall of the bushing is provided with an annular groove, and a second O-ring is installed in the annular groove.

[0010] Preferably, the capping assembly has a plurality of capping holes on the side wall near the atmospheric side stationary ring, and springs are installed in the plurality of capping holes, all of which are pressed against the capping assembly and the atmospheric side stationary ring.

[0011] Preferably, the moving ring seat is fixedly connected to the end of the bushing by screws, a third O-ring is sealed between the moving ring seat and the atmospheric moving ring, a fourth O-ring is sealed between the inner side of the moving ring seat and the outer side of the bushing, and a fifth O-ring is sealed between the inner side of the gland assembly and the outer wall of the atmospheric stationary ring.

[0012] Preferably, a sixth O-ring is sealed between the outer end of the bushing away from the moving ring seat and the moving ring on the medium side.

[0013] Preferably, the retaining ring is a high-molecular-weight PTFE retaining ring.

[0014] Preferably, both the atmospheric side static ring and the dielectric side static ring are made of SiC material.

[0015] Preferably, both the atmospheric side moving ring and the medium side moving ring are made of alloy material.

[0016] In summary, the improved mechanical seal device for a horizontal sand mill disclosed in this application has the following beneficial technical effects:

[0017] 1. A high-molecular-weight PTFE retaining ring is added in front of the medium-side stationary ring and the first O-ring. The purpose is to block tiny zirconium beads in the medium and prevent zirconium beads from jamming the medium-side stationary ring and the first O-ring, thus affecting the service life of the mechanical seal.

[0018] 2. Since both the atmospheric side dynamic ring and the media side dynamic ring are made of alloy material, the wear resistance of the atmospheric side friction pair and the media side friction pair can be improved, and the service life of the sealing structure can be extended.

[0019] 3. By using a spiral pumping ring, the temperature of the sealing structure can be reduced by circulating cooling medium when the equipment rotates, further extending the service life of the sealing structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the overall structure of the mechanical seal structure in an embodiment of this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Moving ring seat; 2. Spiral pumping ring; 21. Shaft sleeve; 22. Pressure cap assembly; 3. Limiting block; 4. Atmospheric side moving ring; 5. Atmospheric side stationary ring; 6. Medium side stationary ring; 7. Medium side moving ring; 8. Push ring; 9. First O-ring; 10. Retaining ring; 11. Second O-ring; 12. Spring; 13. Third O-ring; 14. Fourth O-ring; 15. Fifth O-ring; 16. Sixth O-ring; 17. Snap ring. Detailed Implementation

[0022] The following combination Figure 1 This application will be described in further detail.

[0023] Example

[0024] This application discloses an improved mechanical seal device for a horizontal sand mill. (Refer to...) Figure 1 It mainly includes a moving ring seat 1, a spiral pumping ring 2 and a limiting block 3. The limiting block 3 and the moving ring seat 1 are located at both ends of the spiral pumping ring 2. An atmospheric moving ring 4 and an atmospheric stationary ring 5 are sealed between the moving ring seat 1 and the spiral pumping ring 2. A medium-side stationary ring 6 and a medium-side moving ring 7 are sealed between the limiting block 3 and the spiral pumping ring 2.

[0025] A push ring 8 is installed inside the spiral pumping ring 2. A first O-ring 9 is installed between the push ring 8 and the medium-side stationary ring 6. A retaining ring 10 is installed between the first O-ring 9 and the medium-side stationary ring 6. An inclined stepped surface is integrally formed on the outer side wall of the medium-side stationary ring 6 near the moving ring seat 1. The retaining ring 10 is located inside the inclined stepped surface.

[0026] It should be noted that in this embodiment, the retaining ring 10 is made of high-molecular-weight PTFE. Both the atmospheric-side stationary ring 5 and the dielectric-side stationary ring 6 are preferably made of SiC. Both the atmospheric-side moving ring 4 and the dielectric-side moving ring 7 are made of alloy.

[0027] Reference Figure 1 The spiral pumping ring 2 includes a bushing 21 and a gland assembly 22. The outer wall of the bushing 21 is provided with a pumping annular groove. The gland assembly 22 is located on the outside of the pumping annular groove along with the bushing 21. The push ring 8, the first O-ring 9, the retaining ring 10, and the medium-side stationary ring 6 are located inside the gland assembly 22. The inner wall of the bushing 21 is provided with an annular groove, and a second O-ring 11 is installed in the annular groove.

[0028] In this embodiment, the pressure cap assembly 22 has a plurality of pressure cap holes on the side wall near the atmospheric side static ring 5. The plurality of pressure cap holes are evenly arranged in a circumferential array on the end face of the pressure cap assembly 22. Springs 12 are installed in the plurality of pressure cap holes, and the springs 12 are all pressed against the pressure cap assembly 22 and the atmospheric side static ring 5.

[0029] Reference Figure 1The moving ring seat 1 is fixedly connected to the end of the bushing 21 by screws. A third O-ring 13 is sealed between the moving ring seat 1 and the atmospheric moving ring 4. A fourth O-ring 14 is sealed between the inner side of the moving ring seat 1 and the outer side of the bushing 21. A fifth O-ring 15 is sealed between the inner side of the gland assembly 22 and the outer wall of the atmospheric stationary ring 5.

[0030] In this embodiment, stepped ring grooves are provided on the side of the outer wall of the moving ring seat 1 near the atmospheric side stationary ring 5 seat and at the bottom of the atmospheric side stationary ring 5. The third O-ring 13 is sealed and installed between the two stepped ring grooves.

[0031] Reference Figure 1 A sixth O-ring 16 is sealed between the outer end of the bushing 21 away from the rotating ring seat 1 and the medium-side rotating ring 7, which can restrict the position of the medium-side rotating ring 7.

[0032] It should be noted that, in this embodiment, a retaining ring 17 is installed on the outer side of the end of the bushing 21 away from the moving ring seat 1.

[0033] The implementation principle of the improved mechanical seal device for a horizontal sand mill according to an embodiment of this application is as follows: High-molecular-weight PTFE material is added in front of the medium-side stationary ring 6 and the first O-ring 9. The purpose is to block tiny zirconium beads in the medium, preventing them from jamming the medium-side stationary ring 6 and the first O-ring 9 and affecting the service life of the mechanical seal. Since both the atmospheric-side and medium-side moving rings are made of alloy material, the wear resistance of the atmospheric-side friction pair and the medium-side friction pair can be improved, extending the service life of the sealing structure. Through the use of the spiral pumping ring 2, the temperature of the sealing structure can be reduced by the circulating cooling medium during equipment rotation, further extending the service life of the sealing structure.

[0034] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An improved mechanical seal device for a horizontal sand mill, characterized in that, It includes a moving ring seat (1), a spiral pumping ring (2) and a limiting block (3). The limiting block (3) and the moving ring seat (1) are located at both ends of the spiral pumping ring (2). An atmospheric moving ring (4) and an atmospheric stationary ring (5) are sealed between the moving ring seat (1) and the spiral pumping ring (2). A medium stationary ring (6) and a medium moving ring (7) are sealed between the limiting block (3) and the spiral pumping ring (2). A push ring (8) is installed inside the spiral pumping ring (2). A first O-ring (9) is installed between the push ring (8) and the medium-side stationary ring (6). A retaining ring (10) is installed between the first O-ring (9) and the medium-side stationary ring (6). An inclined step surface is integrally formed on the side of the outer wall of the medium-side stationary ring (6) near the moving ring seat (1). The retaining ring (10) is located on the inner side of the inclined step surface.

2. The improved mechanical seal device for a horizontal sand mill according to claim 1, characterized in that, The spiral pumping ring (2) includes a bushing (21) and a gland assembly (22). The outer wall of the bushing (21) is provided with a pumping annular groove. The gland assembly (22) is located on the outside of the pumping annular groove along with the bushing (21). The push ring (8), the first O-ring (9), the retaining ring (10), and the medium-side stationary ring (6) are located inside the gland assembly (22). The inner wall of the bushing (21) is provided with an annular groove, and a second O-ring (11) is installed in the annular groove.

3. The improved mechanical seal device for a horizontal sand mill according to claim 2, characterized in that, The cap assembly (22) has several cap holes on its side wall near the atmospheric side static ring (5), and springs (12) are installed in the cap holes. The springs (12) are all pressed against the cap assembly (22) and the atmospheric side static ring (5).

4. The improved mechanical seal device for a horizontal sand mill according to claim 3, characterized in that, The moving ring seat (1) is fixedly connected to the end of the bushing (21) by screws. A third O-ring (13) is sealed between the moving ring seat (1) and the atmospheric moving ring (4). A fourth O-ring (14) is sealed between the inner side of the moving ring seat (1) and the outer side of the bushing (21). A fifth O-ring (15) is sealed between the inner side of the gland assembly (22) and the outer wall of the atmospheric stationary ring (5).

5. An improved mechanical seal device for a horizontal sand mill according to claim 4, characterized in that, A sixth O-ring (16) is sealed between the outer end of the bushing (21) away from the moving ring seat (1) and the moving ring (7) on the medium side.

6. The improved mechanical seal device for a horizontal sand mill according to claim 1, characterized in that, The retaining ring (10) is made of high molecular weight PTFE.

7. The improved mechanical seal device for a horizontal sand mill according to claim 1, characterized in that, Both the atmospheric side static ring (5) and the dielectric side static ring (6) are made of SiC material.

8. The improved mechanical seal device for a horizontal sand mill according to claim 1, characterized in that, Both the atmospheric side moving ring (4) and the medium side moving ring (7) are made of alloy material.

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