Water-cooling mechanical sealing device for pump

Abstract

The utility model discloses a water-cooling mechanical sealing device for a pump, which particularly relates to the technical field of mechanical sealing and comprises a sealing device shell, a first sealing supporting seat is arranged on one side of the outer end of the sealing device shell, a second sealing supporting seat is arranged outside one end of the sealing device shell, and a limiting supporting block is arranged at one end of the second sealing supporting seat. An L-shaped movable ring is arranged on the end face of the inner side of the limiting supporting block, and a first separation protruding block is arranged on one side of the inner end face of the L-shaped movable ring. In actual use, the sealing performance of the attaching position of the static ring and the L-shaped movable ring can be effectively improved under the corresponding arrangement state of the static ring and the L-shaped movable ring, when the static ring shakes and loosens, liquid in the static ring and the L-shaped movable ring can permeate into the attaching position of the static ring and the L-shaped movable ring, and therefore the sealing performance of the static ring and the L-shaped movable ring is improved. When the inner side edge of the L-shaped moving ring is attached to the static ring, the infiltrated liquid can be effectively prevented from overflowing outwards.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and more specifically, to a water-cooled mechanical seal device for pumps. Background Technology

[0002] A mechanical seal is a device that prevents fluid leakage by having at least one pair of end faces perpendicular to the axis of rotation, which remain in contact and slide relative to each other under the action of fluid pressure, the elastic force (or magnetic force) of the compensation mechanism, and the cooperation of an auxiliary seal. Mechanical seals with an elastic loading mechanism and an auxiliary seal made of metal bellows are collectively referred to as metal bellows seals. In light-duty seals, rubber bellows are also used as auxiliary seals. However, the elasticity of rubber bellows is limited, and springs are generally needed to meet the loading elastic force. For example, the water-cooled double-end-face mechanical seal device for pumps disclosed in patent publication number CN203420872U includes a main sealing structure and a secondary sealing structure. The main sealing structure includes a sealing seat fixed to the pump body end face, a first moving ring circumferentially linked to the shaft, a moving ring seat fixed to the first moving ring, and a first stationary ring located outside the shaft. The secondary sealing structure includes a second moving ring circumferentially linked to the shaft, a second stationary ring located outside the shaft, and a second spring. The second spring consists of multiple small springs, or a wave spring can also be used.

[0003] When the above-mentioned device is in use, the spring is sealed in the cavity between the rotating ring seat and the first rotating ring to avoid direct contact with the material and to prevent spring failure. During assembly, the first spring, the first rotating ring, the rotating ring, and the rotating ring seat are pre-assembled, and the spring and the rotating ring are axially limited in the rotating ring seat with a spring retainer. This makes installation convenient. However, when the first rotating ring is working, the shaking and gaps can easily cause liquid to leak out, which will affect the sealing performance of the water-cooled mechanical seal of the pump. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a water-cooled mechanical seal device for pumps. The technical problem to be solved by the present invention is: how to increase the sealing effect of the water-cooled mechanical seal structure for pumps.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water-cooled mechanical seal device for a pump, comprising a sealing device housing, a first sealing support seat on one side of its outer end, a second sealing support seat on the outside of one end of the sealing device housing, a limiting support block on one end of the second sealing support seat, an L-shaped moving ring on the inner end face of the limiting support block, a first separating protrusion on one side of the inner end face of the L-shaped moving ring, and a locking ring on one side of the inner end face of the sealing device housing;

[0006] The inner end face of the sealing device housing is provided with a locking top block on the side near the locking ring. The inner end faces of the locking ring and the locking top block are provided with concave limiting grooves. A support spring is provided inside the concave limiting grooves. A stationary ring is provided on one side of the outer end of the locking top block. A second separating protrusion is provided on the outer side of one end of the stationary ring.

[0007] In a preferred embodiment, a connecting flange is provided on one side of the outer end face of the sealing device housing and on one side of the outer end face of the second sealing support, and a connecting bolt is provided on the end face of the connecting flange.

[0008] The first sealing support and the second sealing support are provided with a sealing gasket in the middle of their inner end faces, and a concave mounting groove is provided on one side of the inner end face of the sealing device housing.

[0009] In a preferred embodiment, the interior of the concave mounting groove is provided with a first sealing ring, and the mating surface between the locking top block and the stationary ring is provided with a second sealing ring;

[0010] A limiting protrusion is provided on one side of the outer end face of the locking top block, an adapter groove is provided at one end of the stationary ring, and a locking thread block is provided on the end face of the locking ring.

[0011] In a preferred embodiment, the locking thread block, the limiting protrusion and the adapter slot are all provided in multiples, and are arranged in a ring array outside the center point of the sealing device housing in the right-view direction.

[0012] Both the first and second sealing rings are made of rubber, and the outer end face of the limiting protrusion is adapted to the inner end face of the adapter groove.

[0013] In a preferred embodiment, the number of connecting bolts is multiple, and they are arranged in a ring array outside the center point of the connecting flange in the right-view direction;

[0014] The mounting gasket is a rubber component, and the inner end face of the L-shaped moving ring is adapted to the outer end face of the stationary ring.

[0015] In a preferred embodiment, there are multiple first and second dividing protrusions, and they are set in an equidistant offset state on the end faces of the L-shaped moving ring and stationary ring.

[0016] The first and second separating protrusions are misaligned in the main viewing direction, the cross-section of the supporting spring is square, and the inner end face of the concave limiting groove is adapted to the outer end face of the supporting spring.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] In practical use, this invention effectively increases the sealing performance of the contact area between the stationary ring and the L-shaped rotating ring by configuring the stationary ring and the L-shaped rotating ring accordingly. When the stationary ring shakes or loosens, the liquid inside the stationary ring and the L-shaped rotating ring will seep into the contact area. The inner side of the L-shaped rotating ring, when in contact with the stationary ring, can effectively prevent the seeping liquid from overflowing. At the same time, the multiple first and second separating protrusions can form multiple sealing cavities, thereby forming multiple sealing films under the rotation of the stationary ring and the L-shaped rotating ring, which can effectively increase the sealing performance of the contact area between the stationary ring and the L-shaped rotating ring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the stationary ring connection structure of this utility model.

[0022] Figure 4 This utility model Figure 2 Enlarged structural diagram of section A in the middle.

[0023] The attached figures are labeled as follows: 1. Sealing device housing; 2. Connecting flange; 3. Connecting bolt; 4. First sealing support; 5. Second sealing support; 6. Mounting gasket; 7. Locking ring; 8. Locking threaded block; 9. Support spring; 10. Locking top block; 11. Concave limiting groove; 12. Limiting protrusion; 13. Adaptor slot; 14. Stationary ring; 15. Concave mounting groove; 16. First sealing ring; 17. Limiting support block; 18. L-shaped moving ring; 19. Second sealing ring; 20. First dividing protrusion; 21. Second dividing protrusion. Detailed Implementation

[0024] This utility model provides a water-cooled mechanical seal device for pumps, such as... Figure 1 and 2 As shown, the device includes a sealing device housing 1, with a first sealing support seat 4 on one side of its outer end, a second sealing support seat 5 on the outside of one end of the sealing device housing 1, a locking ring 7 on one side of the inner end face of the sealing device housing 1, and a locking top block 10 on the inner end face of the sealing device housing 1 near the locking ring 7. The inner end faces of the locking ring 7 and the locking top block 10 are provided with concave limiting grooves 11.

[0025] The concave limiting groove 11 is provided with a support spring 9. One side of the outer end face of the sealing device housing 1 and one side of the outer end face of the second sealing support 5 are provided with connecting flanges 2. The end face of the connecting flange 2 is provided with connecting bolts 3. The middle of the inner end face of the first sealing support 4 and the second sealing support 5 is provided with a sealing gasket 6.

[0026] The locking ring 7 has a locking thread block 8 on its end face. There are multiple connecting bolts 3, which are arranged in a ring array outside the center point of the connecting flange 2 in the right view direction. The mounting sealing gasket 6 is a rubber component. The cross-section of the support spring 9 is square. The inner end face of the concave limiting groove 11 is adapted to the outer end face of the support spring 9.

[0027] like Figure 3 and 4 As shown, one end of the second sealing support seat 5 is provided with a limiting support block 17, the inner end face of the limiting support block 17 is provided with an L-shaped moving ring 18, and one side of the inner end face of the L-shaped moving ring 18 is provided with a first separating protrusion 20.

[0028] A stationary ring 14 is provided on one side of the outer end of the locking top block 10. A second dividing protrusion 21 is provided on the outer side of one end of the stationary ring 14. A concave mounting groove 15 is provided on one side of the inner end face of the sealing device housing 1. A first sealing ring 16 is provided inside the concave mounting groove 15.

[0029] The locking top block 10 and the stationary ring 14 are fitted with a second sealing ring 19. A limiting protrusion 12 is provided on one side of the outer end face of the locking top block 10. An adapter groove 13 is provided at one end of the stationary ring 14. The locking thread block 8, the limiting protrusion 12 and the adapter groove 13 are all provided in multiple quantities and are arranged in a ring array outside the center point of the sealing device housing 1 in the right-view direction.

[0030] The first sealing ring 16 and the second sealing ring 19 are both made of rubber, which can effectively increase the sealing performance of the connection between the sealing device housing 1 and the second sealing support 5. The outer end face of the limiting protrusion 12 is adapted to the inner end face of the adapter groove 13, and the inner end face of the L-shaped moving ring 18 is adapted to the outer end face of the stationary ring 14. When displacement and shaking occur at the contact point between the L-shaped moving ring 18 and the stationary ring 14, the side of the L-shaped moving ring 18 is in contact with the stationary ring 14, which can effectively prevent internal liquid leakage when the stationary ring 14 shakes, thereby effectively increasing the stability and sealing performance of the mechanical seal.

[0031] The first dividing protrusion 20 and the second dividing protrusion 21 are provided in multiples, and are set in an equidistant offset state on the end faces of the L-shaped moving ring 18 and the stationary ring 14. The first dividing protrusion 20 and the second dividing protrusion 21 are set in a staggered state in the main viewing direction, which can facilitate the formation of multiple sealed cavities by the first dividing protrusion 20 and the second dividing protrusion 21 in the fit state, thereby forming multiple sets of sealing films, which can effectively increase the leakage prevention effect of the stationary ring 14 and the L-shaped moving ring 18.

[0032] Working principle of this utility model:

[0033] When using this utility model, the operator sequentially installs the first sealing support 4, locking ring 7, support spring 9, locking top block 10, stationary ring 14, and second sealing support 5 on the outer end of the pump body's output shaft. Then, the locking ring 7 is fixed to the outer end of the pump body's output shaft using the locking threaded block 8. Next, the support spring 9 is installed on the inner end face of the concave limiting groove 11, and the locking top block 10 is installed on the other side of the support spring 9. Then, the first sealing support 4 and the second sealing support 5 are locked and fixed using the connecting bolt 3. After locking, the support spring 9 will press against the locking top block 10, causing the stationary ring 14 to fit against the inner end face of the L-shaped moving ring 18. Subsequently, multiple first separating protrusions 20 and second separating protrusions 21 will form multiple sealed cavities. When the stationary ring 14 and the L-shaped moving ring 18 rotate, the multiple cavities at the fitting point will form a multi-layer isolation film, thereby ensuring the sealing performance of the fitting point between the stationary ring 14 and the L-shaped moving ring 18.

[0034] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water-cooled mechanical seal device for a pump, characterized in that, include: The sealing device housing (1) has a first sealing support seat (4) on one side of its outer end. The outer side of one end of the sealing device housing (1) has a second sealing support seat (5). One end of the second sealing support seat (5) has a limiting support block (17). The inner end face of the limiting support block (17) has an L-shaped moving ring (18). One side of the inner end face of the L-shaped moving ring (18) has a first separating protrusion (20). One side of the inner end face of the sealing device housing (1) has a locking ring (7). The inner end face of the sealing device housing (1) is provided with a locking top block (10) on the side near the locking ring (7). The inner end faces of the locking ring (7) and the locking top block (10) are provided with concave limiting grooves (11). The interior of the concave limiting groove (11) is provided with a support spring (9). The outer end of the locking top block (10) is provided with a stationary ring (14). The outer side of one end of the stationary ring (14) is provided with a second separating protrusion (21).

2. A water-cooled mechanical seal device for a pump according to claim 1, characterized in that: One side of the outer end face of the sealing device housing (1) and one side of the outer end face of the second sealing support (5) are provided with connecting flanges (2), and the end face of the connecting flanges (2) is provided with connecting bolts (3). The first sealing support (4) and the second sealing support (5) are provided with a sealing gasket (6) in the middle of their inner end faces, and a concave mounting groove (15) is provided on one side of the inner end face of the sealing device housing (1).

3. A water-cooled mechanical seal device for a pump according to claim 2, characterized in that: The concave mounting groove (15) is provided with a first sealing ring (16), and the mating surface of the locking top block (10) and the stationary ring (14) is provided with a second sealing ring (19); The locking top block (10) has a limiting protrusion (12) on one side of its outer end face, the stationary ring (14) has an adapter groove (13) at one end, and the locking ring (7) has a locking thread block (8) on its end face.

4. A water-cooled mechanical seal device for a pump according to claim 3, characterized in that: The number of locking threaded blocks (8), limiting protrusions (12) and adapter slots (13) are all provided in multiples, and they are arranged in a ring array outside the center point of the sealing device housing (1) in the right-view direction. The first sealing ring (16) and the second sealing ring (19) are both made of rubber. The outer end face of the limiting protrusion (12) is adapted to the inner end face of the adapter groove (13).

5. A water-cooled mechanical seal device for a pump according to claim 2, characterized in that: The number of the connecting bolts (3) is multiple, and they are arranged in a ring array outside the center point of the connecting flange (2) in the right-view direction; The mounting gasket (6) is a rubber component, and the inner end face of the L-shaped moving ring (18) is adapted to the outer end face of the stationary ring (14).

6. A water-cooled mechanical seal device for a pump according to claim 1, characterized in that: The first dividing protrusion (20) and the second dividing protrusion (21) are each provided in multiple quantities, and are set in an equidistant offset state on the end faces of the L-shaped moving ring (18) and the stationary ring (14); The first dividing protrusion (20) and the second dividing protrusion (21) are arranged in a misaligned state in the main viewing direction, the cross section of the support spring (9) is arranged in a square state, and the inner end face of the concave limiting groove (11) is adapted to the outer end face of the support spring (9).

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