Mechanical seal with more stable end faces of movable ring and static ring and pump with mechanical seal

Abstract

The utility model discloses a mechanical seal with more stable end faces of a moving ring and a static ring and a pump with the mechanical seal, and relates to the technical field of mechanical seal, the mechanical seal comprises a shaft sleeve 2, a transmission seat 1, a moving ring assembly 4, a static ring assembly 5 and a gland 6, the gland 6, the moving ring assembly 4 and the static ring assembly 5 are in end face sealing, the gland 6 is provided with a plurality of springs 61, and the springs 61 press the static ring assembly 5; and a Y-shaped ring 63 for pressing the side part of the static ring assembly 5 is arranged between the gland 6 and the static ring assembly 5. According to the mechanical seal, the spring 61 axially presses the static ring assembly 5, and the Y-shaped ring 63 radially presses the static ring assembly 5, so that the static ring assembly 5 is always kept in a relatively stable state, and the end face sealing effect is stable. When the mechanical seal is assembled on an output shaft of a pump to operate, the Y-shaped ring 63 is worn by mechanical vibration, the area of the side part of the static ring assembly 5 radially pressed by the Y-shaped ring 63 is larger, the contact pressure is smaller, and the static ring assembly 5 is resistant to extrusion and abrasion, so that the static ring assembly 5 can be kept in a stable state for a longer time.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a mechanical seal with more stable dynamic and static ring end faces and a pump having the same. Background Technology

[0002] Common mechanical seals mainly consist of rotating and stationary rings, and clamping sealing elements. The rotating ring rotates with the pump shaft, forming a sealing surface with the stationary ring during contact. The clamping element maintains the end face contact under pressure, preventing fluid leakage and avoiding leakage of the sealed medium. However, existing mechanical seals primarily use O-rings, X-rings, U-rings, and wedges as clamping elements between the gland and the stationary ring. These clamping elements have a small contact area with the stationary ring, high pressure, and poor wear resistance, which affects the stability of the stationary ring's end face and results in a short service life. Once the mechanical seal's end face becomes unstable, it will be returned to the factory for repair or scrapped. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a mechanical seal with more stable dynamic and static ring end faces.

[0004] The above-mentioned objectives of this utility model are achieved through the following technical means:

[0005] A mechanical seal with more stable dynamic and static ring end faces includes a bushing 2, one end of which is fixed to a transmission seat 1, and the other end of which is fixed to a dynamic ring assembly 4. The bushing 2 is also provided with a static ring assembly 5 and a pressure cap 6. The pressure cap 6 presses against the static ring assembly 5, and the dynamic ring assembly 4 and the static ring assembly 5 form an end face seal.

[0006] The pressure cap 6 has a plurality of spring holes 62 arranged in a circular pattern for setting springs 61. The springs 61 are arranged to press the rear end of the stationary ring assembly 5.

[0007] A Y-shaped ring 63 is provided between the pressure cap 6 and the stationary ring assembly 5 to press the side of the stationary ring assembly 5.

[0008] Furthermore, a wear-resistant sleeve 64 is provided between the pressure cap 6 and the stationary ring assembly 5 to press against the side of the stationary ring assembly 5.

[0009] Preferably, the moving ring assembly 4 includes a moving ring seat 41 and a moving ring 42, the moving ring 42 being connected to the moving ring seat 41 by a pin, and a first O-ring 43 being provided between the moving ring seat 41 and the moving ring 42.

[0010] Preferably, the stationary ring assembly 5 includes a stationary ring seat 51 and a stationary ring 52, the stationary ring 52 is connected to the stationary ring seat 51 by a pin, and a second O-ring 53 is provided between the stationary ring seat 51 and the stationary ring 52.

[0011] Preferably, the pressure cap 6 includes a right cap 6B and a left cap 6A. Both the right cap 6B and the left cap 6A are provided with a number of matching locking holes. The right cap 6B and the left cap 6A are fixed by screwing the locking holes with screws 65.

[0012] Preferably, the Y-shaped ring 63 is disposed between the right cover 6B and the stationary ring assembly 5, and the spring 61 and the spring hole 62 are disposed on the left cover 6A.

[0013] Preferably, the right cover 6B is provided with a groove and a third O-ring 66 that matches the groove.

[0014] Preferably, the inner side of the moving ring seat 41 is provided with a ring groove and a fourth O-ring 3 that matches the ring groove.

[0015] This utility model also discloses a pump with a mechanical seal, the pump having a gland fixing position and an output shaft, the mechanical seal being assembled on the pump; the bushing 2 being assembled on the output shaft of the pump and fixed to the output shaft by the transmission seat 1, and the gland 6 being fixed to the gland fixing position of the pump.

[0016] Optionally, the pump is at least one of the following: slurry pump, centrifugal pump, water ring pump, positive displacement pump, vacuum pump.

[0017] The beneficial effects of adopting the above technical solution are as follows:

[0018] 1) In this utility model, the stationary ring assembly 5 is axially pressed from the rear end of the stationary ring assembly 5 by a spring 61, and the stationary ring assembly 5 is radially pressed from the side of the stationary ring assembly 5 by a Y-ring 63, so that the stationary ring assembly 5 is always kept in a relatively stable state, and the end face of the moving ring assembly 4 is more stable when rotating relative to the end face of the stationary ring assembly 5, thereby forming an end face sealing effect.

[0019] 2) In this utility model, when the bushing 2 is assembled on the output shaft of the pump and fixed to the output shaft by the transmission seat 1, and the pressure cover 6 is fixed to the pressure cover fixing position of the pump, the output shaft drives the transmission seat 1 to rotate, and the transmission seat 1 further drives the bushing 2 and the rotating ring assembly 4 to rotate. The spring 61 provides axial compensation to the stationary ring assembly 5, and the Y-ring 63 provides radial compensation to the stationary ring assembly 5. Under mechanical vibration, the stationary ring assembly 5 will squeeze the spring 61 and the Y-ring 63. Long-term compression of the Y-ring 63 by the stationary ring assembly 5 will cause wear and deformation to the Y-ring 63. Compared with the existing O-rings, the Y-ring 63 has a larger radial compression area on the side of the stationary ring assembly 5, and the contact pressure is smaller. It is more resistant to compression and wear, so that the stationary ring assembly 5 can maintain a stable state for a longer period of time.

[0020] 3) In this utility model, the wear-resistant sleeve 64 radially presses the stationary ring assembly 5 from the other side, forming a radial double-pressure stationary ring assembly 5 with the Y-ring 63, which further makes the stationary ring assembly 5 more stable and makes the end face of the moving ring assembly 4 more stable when rotating relative to the end face of the stationary ring assembly 5, thereby forming a better end face sealing effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a mechanical seal structure with more stable dynamic and static ring end faces;

[0022] Figure 2 This is a schematic diagram of a Y-shaped ring;

[0023] Figure 3 This is a schematic diagram of a wear-resistant sleeve.

[0024] The components include: transmission seat 1; bushing 2; fourth O-ring 3; moving ring assembly 4; moving ring seat 41; moving ring 42; first O-ring 43; stationary ring assembly 5; stationary ring seat 51; stationary ring 52; second O-ring 53; pressure cap 6; spring 61; spring hole 62; Y-ring 63; wear-resistant sleeve 64; screw 65; third O-ring 66; right cover 6B; and left cover 6A. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1. Figure 1-3 This invention illustrates a mechanical seal with more stable dynamic and static ring end faces, comprising a bushing 2, with a transmission seat 1 fixed to one end and a dynamic ring assembly 4 fixed to the other end. The bushing 2 also includes a static ring assembly 5 and a pressure cap 6, which presses against the static ring assembly 5. The dynamic ring assembly 4 and the static ring assembly 5 form an end face seal.

[0027] The pressure cap 6 has a plurality of spring holes 62 arranged in a circular pattern for setting springs 61. The springs 61 are arranged to press the rear end of the stationary ring assembly 5.

[0028] A Y-shaped ring 63 is provided between the pressure cap 6 and the stationary ring assembly 5 to press the side of the stationary ring assembly 5.

[0029] This mechanical seal uses a spring 61 to axially press the stationary ring assembly 5 from the rear end, and a Y-ring 63 to radially press the stationary ring assembly 5 from the side, so that the stationary ring assembly 5 is always kept in a relatively stable state, and the end face of the rotating ring assembly 4 is more stable when rotating relative to the end face of the stationary ring assembly 5, thereby forming an end face sealing effect.

[0030] When the mechanical seal bushing 2 is assembled on the pump's output shaft and fixed to the output shaft by the transmission seat 1, and the pressure cover 6 is fixed to the pump's pressure cover fixing position, the output shaft drives the transmission seat 1 to rotate, and the transmission seat 1 further drives the bushing 2 and the rotating ring assembly 4 to rotate. The spring 61 provides axial compensation to the stationary ring assembly 5, and the Y-ring 63 provides radial compensation to the stationary ring assembly 5. Under mechanical vibration, the stationary ring assembly 5 will squeeze the spring 61 and the Y-ring 63. Long-term compression of the Y-ring 63 by the stationary ring assembly 5 will cause wear and deformation to the Y-ring 63. Compared with existing O-rings, the Y-ring 63 has a larger radial compression area on the side of the stationary ring assembly 5, lower contact pressure, and is more resistant to wear, allowing the stationary ring assembly 5 to maintain a stable state for a longer period of time.

[0031] Example 2. This example is based on Example 1, such as... Figure 1 and Figure 3 As shown, a wear-resistant sleeve 64 is provided between the pressure cap 6 and the stationary ring assembly 5 to press against the side of the stationary ring assembly 5. The wear-resistant sleeve 64 radially presses against the stationary ring assembly 5 from the other side, forming a radial double-pressure stationary ring assembly 5 with the Y-ring 63, further stabilizing the stationary ring assembly 5 and making the end face of the moving ring assembly 4 more stable when rotating relative to the end face of the stationary ring assembly 5, thereby forming a better end face sealing effect.

[0032] Example 3. Figure 1 The rotating ring assembly 4 is shown. The rotating ring assembly 4 includes a rotating ring seat 41 and a rotating ring 42. The rotating ring 42 is connected to the rotating ring seat 41 by a pin. A first O-ring 43 is provided between the rotating ring seat 41 and the rotating ring 42.

[0033] Example 4. Figure 1 The stationary ring assembly 5 is shown. The stationary ring assembly 5 includes a stationary ring seat 51 and a stationary ring 52. The stationary ring 52 is connected to the stationary ring seat 51 by a pin. A second O-ring 53 is provided between the stationary ring seat 51 and the stationary ring 52.

[0034] Example 5. Figure 1 The pressure cover 6 is shown. To facilitate the assembly of the pressure cover 6, the pressure cover 6 includes a right cover body 6B and a left cover body 6A. Both the right cover body 6B and the left cover body 6A are provided with a number of matching locking holes. The right cover body 6B and the left cover body 6A are fixed by screws 65 into the locking holes.

[0035] Example 6. This example is based on Example 5, such as... Figure 1 As shown, to facilitate the assembly of spring 61 and Y-ring 63, Y-ring 63 is located between right cover 6B and stationary ring assembly 5, and spring 61 and spring hole 62 are located in left cover 6A.

[0036] Example 7. This example shows the third O-ring 66, as follows. Figure 1 As shown, the right cover 6B is provided with a groove and a third O-ring 66 that matches the groove. When the gland is fixed to the pump, the third O-ring 66 provides a sealing function.

[0037] Example 8. This example shows the fourth O-ring 3, as follows. Figure 1 As shown, the inner side of the moving ring seat 41 is provided with a ring groove and a fourth O-ring 3 that matches the ring groove. When the shaft sleeve is fitted onto the output shaft of the pump, the fourth O-ring 3 serves as a seal.

[0038] Example 9. This example illustrates a pump with a mechanical seal, the pump having a gland fixing position and an output shaft (not shown in the figure). Please refer to... Figure 1 The mechanical seal is assembled on the pump; the bushing 2 is assembled on the output shaft of the pump and fixed to the output shaft by the transmission seat 1; and the pressure cover 6 is fixed to the pressure cover fixing position of the pump.

[0039] This pump with a mechanical seal has a bushing 2 mounted on the pump's output shaft and fixed to the output shaft by a transmission seat 1. The pressure cover 6 is fixed to the pump's pressure cover fixing position. The output shaft drives the transmission seat 1 to rotate, and the transmission seat 1 further drives the bushing 2 and the rotating ring assembly 4 to rotate. A spring 61 axially presses the stationary ring assembly 5 from the rear end, and a Y-ring 63 radially presses the stationary ring assembly 5 from the side, so that the stationary ring assembly 5 always remains in a relatively stable state. This makes the end face of the rotating ring assembly 4 more stable when rotating relative to the end face of the stationary ring assembly 5, thereby forming an end face sealing effect. Under mechanical vibration, the stationary ring assembly 5 will compress the spring 61 and the Y-ring 63. Long-term compression of the Y-ring 63 by the stationary ring assembly 5 will cause wear and deformation of the Y-ring 63. The spring 61 provides axial compensation for the stationary ring assembly 5, and the Y-ring 63 provides radial compensation for the stationary ring assembly 5. Compared with existing O-rings, the Y-ring 63 has a larger radial compression area on the side of the stationary ring assembly 5, lower contact pressure, and is more resistant to compression and wear, enabling the stationary ring assembly 5 to maintain a stable state for a longer period of time.

[0040] Example 10. This example is based on Example 9, and the pump is at least one of the following: slurry pump, centrifugal pump, water ring pump, positive displacement pump, vacuum pump.

[0041] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A mechanical seal with more stable dynamic and static ring end faces, comprising a bushing (2), a transmission seat (1) fixed at one end of the bushing (2), a dynamic ring assembly (4) fixed at the other end, a static ring assembly (5) and a pressure cap (6) also provided on the bushing (2), the pressure cap (6) pressing the static ring assembly (5), the dynamic ring assembly (4) and the static ring assembly (5) forming an end face seal, characterized in that, The pressure cap (6) has a plurality of spring holes (62) arranged in a circular pattern for setting springs (61), and the springs (61) press against the rear end of the stationary ring assembly (5); A Y-shaped ring (63) is provided between the pressure cap (6) and the stationary ring assembly (5) to press the side of the stationary ring assembly (5).

2. The mechanical seal with more stable dynamic and static ring end faces as described in claim 1, characterized in that, A wear-resistant sleeve (64) is provided between the pressure cap (6) and the stationary ring assembly (5) to press against the side of the stationary ring assembly (5).

3. The mechanical seal with more stable dynamic and static ring end faces as described in claim 1, characterized in that, The moving ring assembly (4) includes a moving ring seat (41) and a moving ring (42). The moving ring (42) is connected to the moving ring seat (41) by a pin. A first O-ring (43) is provided between the moving ring seat (41) and the moving ring (42).

4. The mechanical seal with more stable dynamic and static ring end faces as described in claim 1, characterized in that, The stationary ring assembly (5) includes a stationary ring seat (51) and a stationary ring (52). The stationary ring (52) is connected to the stationary ring seat (51) by a pin. A second O-ring (53) is provided between the stationary ring seat (51) and the stationary ring (52).

5. The mechanical seal with more stable dynamic and static ring end faces as described in claim 1, characterized in that, The cover (6) includes a right cover (6B) and a left cover (6A). Both the right cover (6B) and the left cover (6A) are provided with a number of matching locking holes. The right cover (6B) and the left cover (6A) are fixed by screws (65) into the locking holes.

6. The mechanical seal with more stable dynamic and static ring end faces as described in claim 5, characterized in that, The Y-ring (63) is located between the right cover (6B) and the stationary ring assembly (5), and the spring (61) and spring hole (62) are located on the left cover (6A).

7. The mechanical seal with more stable dynamic and static ring end faces as described in claim 5, characterized in that, The right cover (6B) is provided with a groove and a third O-ring (66) that matches the groove.

8. The mechanical seal with more stable dynamic and static ring end faces as described in claim 3, characterized in that, The inner side of the moving ring seat (41) is provided with a ring groove and a fourth O-ring (3) that matches the ring groove.

9. A pump with a mechanical seal, characterized in that, The pump has a gland fixing position and an output shaft, and the mechanical seal according to any one of claims 1-8 is assembled in the pump; the bushing (2) is assembled in the output shaft of the pump and fixed to the output shaft by the transmission seat (1), and the gland (6) is fixed in the gland fixing position of the pump.

10. The pump with a mechanical seal as described in claim 9, characterized in that, The pump is at least one of the following: slurry pump, centrifugal pump, water ring pump, positive displacement pump, vacuum pump.

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