Double-end-face mechanical seal

Abstract

The utility model provides a double-end-face mechanical seal which comprises a left static support, a left static ring, a left movable support, a left movable ring, a right static support, a right static ring, a right movable support and a right movable ring, the left static ring is fixed on the left static support, the right static ring is fixed on the right static support, the left movable ring is fixed on the left movable support, and the right movable ring is fixed on the right movable support. The left movable ring is fixed on the left movable support, the right movable ring is fixed on the right movable support, the left static ring abuts against the left movable ring, the right static ring abuts against the right movable ring, the outer wall of the left movable support is connected with a left fixing frame, the outer wall of the right movable support is connected with a right fixing frame, the left fixing frame is provided with a left L-shaped section, the right fixing frame is provided with a right L-shaped section, and the right L-shaped section is provided with a right L-shaped section. An elastic piece is arranged between the left L-shaped section and the right L-shaped section, the left movable ring can abut against the left static ring, the right movable ring can abut against the right static ring, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to a double-end surface mechanical seal. Background Art

[0002] At present, a Chinese patent with authorization announcement number CN201696343U discloses a double-end mechanical seal device for a pump, including a fastening drive block sleeved on a pump drive shaft, a stationary ring seal and a dynamic ring seal are sleeved on both sides of the fastening drive block, a stationary ring seal is embedded in a stationary ring grinding block, the dynamic ring sealing ring is embedded in the dynamic ring grinding block, the dynamic ring grinding block is in contact with the stationary ring grinding block, a straight keyway is provided between the fastening drive block and the pump drive shaft, and an anti-rotation pin is embedded in the straight keyway.

[0003] However, this type of double-end mechanical seal device for pumps requires the use of two compression springs, and during the installation of the compression springs, pressure needs to be applied in advance to compress and deform the compression springs, which is inconvenient for workers to install. Utility Model Content

[0004] In view of this, the utility model aims to provide a double-end mechanical seal, which applies elastic force to the left movable ring and the right movable ring through an elastic member to achieve sealing, thereby achieving the purpose of easy installation.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a double-end mechanical seal, including a left static support, a left static ring, a left movable support, a left movable ring, a right static support, a right static ring, a right movable support, and a right movable ring. The left static ring is fixed on the left static support, the right static ring is fixed on the right static support, the left movable ring is fixed on the left movable support, and the right movable ring is fixed on the right movable support. The left static ring is in conflict with the left movable ring, and the right static ring is in conflict with the right movable ring. A left fixing frame is connected to the outer wall of the left movable support, and a right fixing frame is connected to the outer wall of the right movable support. A left L-shaped section is arranged on the left fixing frame, and a right L-shaped section is arranged on the right fixing frame. An elastic member is connected between the left L-shaped section and the right L-shaped section.

[0006] To implement the above technical solution, first fix the left fixing frame on the left moving support and the right fixing frame on the right moving support, then fix the left moving support and the right moving support on the pump shaft, and connect the left moving ring and the right moving ring to the left moving support and the right moving support respectively. Sleeve the elastic member on the outside of the left fixing frame and the right fixing frame, apply force to the elastic member, so that the elastic member is embedded between the left fixing frame and the right fixing frame, and through the elastic force of the elastic member, the left moving ring tends to move closer to the left static ring, and the right moving ring tends to move closer to the right static ring, so as to achieve the sealing effect. Only one elastic member is needed to achieve the sealing function, which reduces the labor intensity of workers and improves the convenience of installation.

[0007] As a preferred solution of the utility model, a left positioning ring is fixedly connected to the outer wall of the left fixing frame, a left supporting ring is arranged on the outer wall of the left positioning ring, and the left supporting ring is connected to the left L-shaped section via a left limiting structure.

[0008] To implement the above technical solution, the left support ring is fixed to the left positioning ring, and a pulling force is applied to the left L-shape through the left limiting structure to resist the centrifugal force generated by the pump shaft during high-speed rotation, so that the left L-shaped section is not easily deformed.

[0009] As a preferred solution of the utility model, the left limiting structure includes a left T-shaped groove and a left T-shaped rod. The left T-shaped groove is opened on the left L-shaped segment and is arranged along the axial direction of the left L-shaped segment. The left T-shaped rod is fixed on the outer wall of the left support ring and is slidably connected to the left T-shaped groove.

[0010] To implement the above technical solution, the left positioning ring is fixed to the left movable support. During this process, the left T-shaped rod is slidably connected to the left T-shaped groove. The left T-shaped rod and the inner wall of the left T-shaped groove are in contact with each other to resist the centrifugal force, thereby keeping the left L-shaped section stable.

[0011] As a preferred solution of the utility model, a right positioning ring is fixedly connected to the outer wall of the right fixing frame, a right supporting ring is arranged on the outer wall of the right positioning ring, and the right supporting ring is connected to the right L-shaped segment via a right limiting structure.

[0012] To implement the above technical solution, the right support ring is fixed to the right positioning ring, and a pulling force is applied to the right L-shape through the right limiting structure to resist the centrifugal force generated by the pump shaft during high-speed rotation, so that the right L-shaped section is not easily deformed.

[0013] As a preferred solution of the utility model, the right limiting structure includes a right T-shaped groove and a right T-shaped rod, the right T-shaped groove is opened on the right L-shaped segment and is arranged along the axial direction of the right L-shaped segment, and the right T-shaped rod is fixed on the outer wall of the right support ring and is slidably connected in the right T-shaped groove.

[0014] To implement the above technical solution, the right positioning ring is fixed to the right movable support. During this process, the right T-shaped rod is slidably connected to the right T-shaped groove. The right T-shaped rod and the inner wall of the right T-shaped groove are in contact with each other to resist the centrifugal force, thereby keeping the right L-shaped section stable.

[0015] As a preferred solution of the utility model, a convex portion is integrally provided on the right moving ring, the convex portion abuts against the right stationary ring, and a cavity is formed between the convex portion and the right stationary ring.

[0016] To implement the above technical solution, lubricating oil can be filled in the cavity to ensure that the right moving ring and the right static ring can maintain lubrication for a long time, thereby extending the service life.

[0017] As a preferred solution of the utility model, a left hook is connected to the outer wall of the left L-shaped section, and the left hook is connected to the elastic member. A right hook is connected to the outer wall of the right L-shaped section, and the right hook is connected to the elastic member.

[0018] To implement the above technical solution, through the pulling force of the left and right hooks, the elastic member is not easily separated from the left L-shaped section and the right L-shaped section during high-speed rotation, thereby improving stability.

[0019] As a preferred solution of the utility model, a left connecting convex ring is arranged on the outer wall of the left movable support, a left connecting ring groove for embedding the left connecting convex ring is opened on the left fixed frame, a right connecting convex ring is arranged on the outer wall of the right movable support, and a right connecting ring groove for embedding the right connecting convex ring is opened on the right fixed frame.

[0020] The above technical solution is implemented to make the relationship between the left movable support and the left fixed frame more stable, and the relationship between the right movable support and the right fixed frame more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment;

[0022] Figure 2 A three-dimensional diagram showing the left limit structure;

[0023] Figure 3 It is a three-dimensional diagram showing the right limit structure.

[0024] 1. The left stationary support; 2. The left stationary ring; 3. The left movable support; 4. The left movable ring; 5. The right stationary support; 6. The right stationary ring; 7. The right movable ring; 8. The right movable ring; 9. The left stationary support; 10. The left stationary ring; 11. The left stationary support; 12. The left stationary ring; 13. The left movable support; 14. The left movable ring; 21. The right stationary support; 22. The right stationary ring; 23. The right movable support; 24. The right movable ring; 31. The convex portion; 32. The cavity; 41. The left fixing frame; 42. The left connecting convex ring; 43. The left connecting ring groove; 44. The right fixing frame; 45. The right connecting convex ring; 46. The right connecting ring groove; 51. The left L-shaped section; 52. The right L-shaped section; 53. The elastic member; 61. The left positioning ring; 62. The left supporting ring; 63. The left limiting structure; 64. The left T-shaped groove; 65. The left T-shaped rod; 71. The right positioning ring; 72. The right supporting ring; 73. The right limiting structure; 74. The right T-shaped groove; 75. The right T-shaped rod; 81. The left hook; 82. The right hook. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0026] A double-end mechanical seal comprises a left static support 11, a left static ring 12, a left dynamic support 13, a left dynamic ring 14, a right static support 21, a right static ring 22, a right dynamic support 23 and a right dynamic ring 24.

[0027] The left static ring 12 is fixed on the left static support 11, and the right static ring 22 is fixed on the right static support 21; the left dynamic ring 14 is fixed on the left dynamic support 13, and the right dynamic ring 24 is fixed on the right dynamic support 23. The left static ring 12 abuts against the left dynamic ring 14, and the right static ring 22 abuts against the right dynamic ring 24.

[0028] The right moving ring 24 is integrally provided with a convex portion 31, which contacts the right stationary ring 22, and a cavity 32 is formed between the convex portion 31 and the right stationary ring 22. The cavity 32 is filled with lubricating oil.

[0029] A left fixing frame 41 is connected to the outer wall of the left movable support 13, and a right fixing frame 44 is connected to the outer wall of the right movable support 23. A left connecting protruding ring 42 is provided on the outer wall of the left movable support 13, and a left connecting ring groove 43 for embedding the left connecting protruding ring 42 is provided on the left fixing frame 41. A right connecting protruding ring 45 is provided on the outer wall of the right movable support 23, and a right connecting ring groove 46 for embedding the right connecting protruding ring 45 is provided on the right fixing frame 44.

[0030] The left fixing frame 41 is provided with a left L-shaped section 51, and the right fixing frame 44 is provided with a right L-shaped section 52. An elastic member 53 is connected between the left L-shaped section 51 and the right L-shaped section 52. The elastic member 53 is a spring, and the two ends of the elastic member 53 are fixedly connected to the left L-shaped section 51 and the right L-shaped section 52 respectively.

[0031] A left positioning ring 61 is fixedly connected to the outer wall of the left fixing frame 41 , and a left supporting ring 62 is integrally provided on the outer wall of the left positioning ring 61 . The left supporting ring 62 is connected to the left L-shaped section 51 via a left limiting structure 63 .

[0032] The left limiting structure 63 includes a left T-shaped groove 64 and a left T-shaped rod 65. The left T-shaped groove 64 is opened on the left L-shaped section 51 and arranged along the axial direction of the left L-shaped section 51. The left T-shaped rod 65 is fixed on the outer wall of the left supporting ring 62 and slidably connected in the left T-shaped groove 64.

[0033] A right positioning ring 71 is fixedly connected to the outer wall of the right fixing frame 44 . A right supporting ring 72 is arranged on the outer wall of the right positioning ring 71 . The right supporting ring 72 is connected to the right L-shaped section 52 via a right limiting structure 73 .

[0034] The right limiting structure 73 includes a right T-shaped groove 74 and a right T-shaped rod 75. The right T-shaped groove 74 is formed on the right L-shaped section 52 and is arranged along the axial direction of the right L-shaped section 52. The right T-shaped rod 75 is fixed on the outer wall of the right supporting ring 72 and is slidably connected in the right T-shaped groove 74.

[0035] A left hook 81 is fixedly connected to the outer wall of the left L-shaped section 51 and is hung in the middle of the elastic member 53. A right hook 82 is fixedly connected to the outer wall of the right L-shaped section 52 and is also hung in the middle of the elastic member 53.

[0036] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A double-end mechanical seal, comprising a left static support (11), a left static ring (12), a left dynamic support (13), a left dynamic ring (14), a right static support (21), a right static ring (22), a right dynamic support (23), and a right dynamic ring (24), wherein the left static ring (12) is fixed on the left static support (11), the right static ring (22) is fixed on the right static support (21), the left dynamic ring (14) is fixed on the left dynamic support (13), the right dynamic ring (24) is fixed on the right dynamic support (23), the left static ring (12) is in conflict with the left dynamic ring (14), and the right static ring (22) is in conflict with the right dynamic ring (24), wherein: The outer wall of the left movable support (13) is connected to a left fixing frame (41), the outer wall of the right movable support (23) is connected to a right fixing frame (44), the left fixing frame (41) is provided with a left L-shaped section (51), the right fixing frame (44) is provided with a right L-shaped section (52), and an elastic member (53) is connected between the left L-shaped section (51) and the right L-shaped section (52).

2. A double-end mechanical seal according to claim 1, characterized in that: A left positioning ring (61) is fixedly connected to the outer wall of the left fixing frame (41), a left supporting ring (62) is arranged on the outer wall of the left positioning ring (61), and the left supporting ring (62) is connected to the left L-shaped section (51) via a left limiting structure (63).

3. A double-end mechanical seal according to claim 2, characterized in that: The left limiting structure (63) comprises a left T-shaped groove (64) and a left T-shaped rod (65); the left T-shaped groove (64) is opened on the left L-shaped section (51) and is arranged along the axial direction of the left L-shaped section (51); the left T-shaped rod (65) is fixed on the outer wall of the left supporting ring (62) and is slidably connected to the left T-shaped groove (64).

4. A double-end mechanical seal according to claim 1, characterized in that: A right positioning ring (71) is fixedly connected to the outer wall of the right fixing frame (44), a right supporting ring (72) is arranged on the outer wall of the right positioning ring (71), and the right supporting ring (72) is connected to the right L-shaped section (52) via a right limiting structure (73).

5. A double-end mechanical seal according to claim 4, characterized in that: The right limiting structure (73) comprises a right T-shaped groove (74) and a right T-shaped rod (75); the right T-shaped groove (74) is opened on the right L-shaped section (52) and is arranged along the axial direction of the right L-shaped section (52); the right T-shaped rod (75) is fixed on the outer wall of the right supporting ring (72) and is slidably connected in the right T-shaped groove (74).

6. A double-end mechanical seal according to claim 1, characterized in that: The right moving ring (24) is integrally provided with a convex portion (31), the convex portion (31) abuts against the right stationary ring (22), and a cavity (32) is formed between the convex portion (31) and the right stationary ring (22).

7. A double-end mechanical seal according to claim 1, characterized in that: A left hook (81) is connected to the outer wall of the left L-shaped section (51), and the left hook (81) is connected to the elastic member (53). A right hook (82) is connected to the outer wall of the right L-shaped section (52), and the right hook (82) is connected to the elastic member (53).

8. A double-end mechanical seal according to claim 1, characterized in that: A left connecting convex ring (42) is arranged on the outer wall of the left movable support (13), a left connecting ring groove (43) for embedding the left connecting convex ring (42) is provided on the left fixed frame (41), a right connecting convex ring (45) is arranged on the outer wall of the right movable support (23), and a right connecting ring groove (46) for embedding the right connecting convex ring (45) is provided on the right fixed frame (44).

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