Centrifugal pump bearing drainage sealing structure

Abstract

The utility model discloses a centrifugal pump bearing drainage sealing structure, which belongs to the technical field of bearing sealing, solves the problem that a sealing gasket is troublesome to replace in the prior art, and comprises a pump body and a rotating shaft, the rotating shaft is rotatably mounted in the pump body, the outer surface of the rotating shaft is movably sleeved with a bearing cover, and an annular clamping groove is formed in the end part of the pump body. A sealing gasket matched with the bearing cover is clamped in the annular clamping groove, the bearing cover is in threaded connection with the end face of the pump body, the outer surface of the bearing cover is fixedly sleeved with a lantern ring, and two symmetrically-distributed shifting blocks are fixed to the outer surface of the lantern ring; through the arrangement of the structures such as the pull block, the arc-shaped connecting rod, the shifting block, the movable rod and the U-shaped clamping block, the effect of limiting the mounted bearing cover is achieved, the stability of the bearing cover is kept, the bearing cover is driven to rotate through the shifting block, the bearing cover is separated from the pump body, and therefore a worker can conveniently take down the sealing gasket from the annular clamping groove, and the working efficiency is improved. And the sealing gasket is convenient to replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing seals, and in particular relates to a centrifugal pump bearing drainage seal structure. Background Art

[0002] A centrifugal pump is a common fluid conveying device, and its working principle is based on the principle of centrifugal force. Specifically, a centrifugal pump generates centrifugal force through the rotating impeller, accelerates the fluid and brings it into the pump body, and then discharges the fluid through the outlet; a centrifugal pump is composed of multiple parts, including the pump casing, impeller, pump shaft, bearings, sealing rings, etc.

[0003] In the prior art, the bearing is one of the most important components in the centrifugal pump, and the bearing plays a role of supporting and reducing friction. During operation, the centrifugal pump bearing is shielded and sealed by the bearing cover and the sealing gasket. The sealing gasket is prone to wear after long-term use, resulting in a loose seal of the bearing cover, and the sealing gasket needs to be replaced. The bearing cover is usually connected and fixed to the centrifugal pump with multiple bolts. The staff needs to use handheld tools to operate it, and the operation is relatively troublesome, which brings trouble to the replacement of the sealing gasket.

[0004] Therefore, a centrifugal pump bearing drainage sealing structure is needed to solve the problem of troublesome replacement of sealing gaskets in the prior art. Utility Model Content

[0005] The utility model aims to provide a centrifugal pump bearing drainage sealing structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a centrifugal pump bearing drainage sealing structure, comprising a pump body and a rotating shaft, the rotating shaft is rotatably installed inside the pump body, the outer surface of the rotating shaft is movably sleeved with a bearing cover, the end of the pump body is provided with an annular groove, the inside of the annular groove is clamped with a sealing gasket that matches the bearing cover, the bearing cover is threadedly connected to the end face of the pump body, the outer surface of the bearing cover is fixedly sleeved with a ring, the outer surface of the ring is fixed with two symmetrically distributed shifting blocks, the outer surface of the pump body is fixedly sleeved with a fixing ring, and the surface of the fixing ring is provided with a limiting mechanism that matches the shifting block.

[0007] It should be noted in the scheme that the limiting mechanism includes two movable rods that are movable and penetrate the surface of the fixed ring and are symmetrically distributed. U-shaped blocks are fixed at the ends of the two movable rods. The U-shaped blocks are engaged with the shift blocks. A spring is sleeved on the outer surface of the movable rod. One end of the spring is fixed to the surface of the U-shaped block, and the other end of the spring is fixed to the surface of the fixed ring.

[0008] It is further worth noting that an arc-shaped connecting rod is fixed to one end of the two movable rods away from the U-shaped clamping block.

[0009] It should be further explained that the inner wall of the bearing cover is rotatably connected to a rotating ring, a plurality of positioning rods are evenly fixed on the surface of the rotating ring, a circular through hole is opened on the surface of the sealing gasket corresponding to the positioning rod, a plurality of positioning holes are opened on the inner wall of the annular groove corresponding to the positioning rod, and the positioning rods are plugged into the positioning holes.

[0010] As a preferred embodiment, a sealing groove is provided on the surface of the bearing cover, a sealing sleeve is provided on the outer surface of the rotating shaft, the sealing sleeve is rotatably connected to the sealing groove, a fixing hole is provided on the surface of the sealing sleeve corresponding to the rotating shaft, and a fixing bolt is threadedly connected to the inner wall of the fixing hole corresponding to the rotating shaft.

[0011] As a preferred implementation, a pull block is fixed in the middle of the top surface of the arc-shaped connecting rod.

[0012] Compared with the prior art, the centrifugal pump bearing drainage sealing structure provided by the utility model has at least the following beneficial effects:

[0013] (1) By setting up structures such as a pull block, an arc-shaped connecting rod, a shift block, a movable rod and a U-shaped clamp block, the effect of limiting the bearing cover after installation is achieved, the stability of the bearing cover is maintained, and the bearing cover is driven to rotate by the shift block so that the bearing cover is separated from the pump body, thereby making it convenient for the staff to remove the sealing gasket from the annular groove and replace the sealing gasket.

[0014] (2) By setting structures such as the positioning rod, the circular through hole and the rotating ring, the sealing gasket is limited in position, thereby maintaining the stability of the sealing gasket during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0017] Figure 3 It is a partial structural schematic diagram of the utility model;

[0018] Figure 4 This is a schematic diagram of the sealing sleeve and fixing bolt structure of the utility model;

[0019] Figure 5 This is a schematic diagram of the sealing gasket structure of the utility model;

[0020] Figure 6 This is a schematic diagram of the bearing cover structure of the utility model;

[0021] Figure 7 This is a structural schematic diagram of the bearing cover of the utility model from another perspective.

[0022] In the figure: 1. pump body; 2. rotating shaft; 3. bearing cover; 4. fixing ring; 5. sleeve ring; 6. shift block; 7. sealing sleeve; 8. U-shaped clamping block; 9. movable rod; 10. arc-shaped connecting rod; 11. spring; 12. pull block; 13. annular clamping groove; 14. positioning hole; 15. sealing gasket; 16. circular through hole; 17. positioning rod; 18. rotating ring; 19. sealing groove; 20. fixing hole; 21. fixing bolt. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-7 The utility model provides a centrifugal pump bearing drainage sealing structure, including a pump body 1 and a rotating shaft 2, the rotating shaft 2 is rotatably installed inside the pump body 1, the outer surface of the rotating shaft 2 is movably sleeved with a bearing cover 3, the end of the pump body 1 is provided with an annular groove 13, the inside of the annular groove 13 is clamped with a sealing gasket 15 matched with the bearing cover 3, the bearing cover 3 is threadedly connected to the end surface of the pump body 1, the outer surface of the bearing cover 3 is fixedly sleeved with a collar 5, the outer surface of the collar 5 is fixed with two symmetrically distributed shifting blocks 6, the outer surface of the pump body 1 is fixedly sleeved with a fixing ring 4, and the surface of the fixing ring 4 is provided with a limiting mechanism matched with the shifting block 6.

[0025] Further Figure 1 and Figure 2 As shown, it is worth explaining in detail that the limiting mechanism includes two movable rods 9 that are movable and penetrate the surface of the fixed ring 4 and are symmetrically distributed. U-shaped blocks 8 are fixed at the ends of the two movable rods 9. The U-shaped block 8 is clamped with the shift block 6. The outer surface of the movable rod 9 is sleeved with a spring 11. One end of the spring 11 is fixed to the surface of the U-shaped block 8, and the other end of the spring 11 is fixed to the surface of the fixed ring 4.

[0026] Further Figure 2 and Figure 3 As shown, it is worth explaining in detail that an arc-shaped connecting rod 10 is fixed to one end of the two movable rods 9 away from the U-shaped block 8, and a pull block 12 is fixed in the middle of the top surface of the arc-shaped connecting rod 10. The pull block 12 and the arc-shaped connecting rod 10 facilitate the simultaneous movement of the two movable rods 9, thereby facilitating the movement of the U-shaped block 8.

[0027] Further Figure 3 , Figure 5 and Figure 6 As shown, it is worth explaining in detail that the inner wall of the bearing cover 3 is rotatably connected with a rotating ring 18, and a plurality of positioning rods 17 are evenly fixed on the surface of the rotating ring 18. A circular through hole 16 is opened on the surface of the sealing gasket 15 corresponding to the positioning rod 17, and a plurality of positioning holes 14 are opened on the inner wall of the annular groove 13 corresponding to the positioning rod 17, and the positioning rod 17 is plugged into the positioning hole 14.

[0028] Further Figure 1 , Figure 4 and Figure 7 As shown, it is worth explaining in detail that a sealing groove 19 is provided on the surface of the bearing cover 3, a sealing sleeve 7 is movably sleeved on the outer surface of the rotating shaft 2, the sealing sleeve 7 is rotatably connected to the sealing groove 19, a fixing hole 20 is provided on the surface of the sealing sleeve 7 corresponding to the rotating shaft 2, and a fixing bolt 21 is threadedly connected to the inner wall of the fixing hole 20 corresponding to the rotating shaft 2.

[0029] The present solution has the following working process: by rotating the fixing bolt 21, the fixing bolt 21 is disengaged from the fixing hole 20, and then the sealing sleeve 7 is removed from the rotating shaft 2, and then by pulling the pull block 12, the arc-shaped connecting rod 10 is driven to move in the direction away from the shift block 6, thereby driving the two movable rods 9 to move, and then driving the two U-shaped blocks 8 to disengage from the shift block 6, and then only the shift block 6 needs to be rotated to drive the bearing cover 3 to rotate, and then the bearing cover 3 is separated from the pump body 1, so that the staff can remove the sealing gasket 15 from the annular groove 13, which is convenient for the staff to replace the new sealing gasket 15, and then put the new sealing gasket 15 into the annular groove 13 Finally, the positioning rod 17 on the bearing cover 3 passes through the circular through hole 16 on the sealing gasket 15 and is inserted into the positioning hole 14, thereby limiting the sealing gasket 15 and maintaining the stability of the sealing gasket 15 after installation, and then the bearing cover 3 is rotated to connect with the pump body 1. During the rotation of the bearing cover 3, the rotating ring 18 does not move. After the bearing cover 3 is installed, the U-shaped block 8 is stuck on the shift block 6 under the elastic force of the spring 11, so as to limit the bearing cover 3 and maintain the stability of the bearing cover 3. Then, the sealing sleeve 7 is put on the rotating shaft 2, and the sealing sleeve 7 is fixed to the surface of the rotating shaft 2 with the fixing bolts 21, so as to cooperate with the sealing groove 19 to seal the bearing cover 3.

[0030] According to the above working process, it can be known that: through the setting of structures such as the pulling block 12, the arc-shaped connecting rod 10, the shifting block 6, the movable rod 9 and the U-shaped clamping block 8, the effect of limiting the bearing cover 3 after installation is achieved, and the stability of the bearing cover 3 is maintained. The bearing cover 3 is driven to rotate by the shifting block 6, so that the bearing cover 3 is separated from the pump body 1, so that the staff can easily remove the sealing gasket 15 from the annular groove 13, which is convenient for the replacement of the sealing gasket 15. Through the setting of structures such as the positioning rod 17, the circular through hole 16 and the rotating ring 18, the effect of limiting the sealing gasket 15 is achieved, and the stability of the sealing gasket 15 during installation is maintained.

[0031] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0032] Finally: 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 in the protection scope of the present utility model.

Claims

1. A centrifugal pump bearing drainage sealing structure, comprising a pump body (1) and a rotating shaft (2), It is characterized in that The rotating shaft (2) is rotatably mounted inside the pump body (1); a bearing cover (3) is movably sleeved on the outer surface of the rotating shaft (2); an annular groove (13) is provided at the end of the pump body (1); a sealing gasket (15) matching with the bearing cover (3) is clamped inside the annular groove (13); the bearing cover (3) is threadedly connected to the end surface of the pump body (1); a collar (5) is fixedly sleeved on the outer surface of the bearing cover (3); two symmetrically distributed shifting blocks (6) are fixedly disposed on the outer surface of the collar (5); a fixing ring (4) is fixedly sleeved on the outer surface of the pump body (1); a limiting mechanism matching with the shifting blocks (6) is disposed on the surface of the fixing ring (4).

2. A centrifugal pump bearing drainage sealing structure according to claim 1, Features: The limiting mechanism comprises two movable rods (9) which are movable and penetrate the surface of the fixing ring (4) and are symmetrically distributed. U-shaped clamping blocks (8) are fixed at the ends of the two movable rods (9). The U-shaped clamping blocks (8) are clamped with the shifting blocks (6). A spring (11) is sleeved on the outer surface of the movable rod (9). One end of the spring (11) is fixed to the surface of the U-shaped clamping block (8), and the other end of the spring (11) is fixed to the surface of the fixing ring (4).

3. A centrifugal pump bearing drainage sealing structure according to claim 2, Features: An arc-shaped connecting rod (10) is fixed to one end of the two movable rods (9) away from the U-shaped clamping block (8).

4. A centrifugal pump bearing drainage sealing structure according to claim 1, Features: The inner wall of the bearing cover (3) is rotatably connected to a rotating ring (18), a plurality of positioning rods (17) are evenly fixed on the surface of the rotating ring (18), a circular through hole (16) is formed on the surface of the sealing gasket (15) corresponding to the positioning rod (17), a plurality of positioning holes (14) are formed on the inner wall of the annular groove (13) corresponding to the positioning rod (17), and the positioning rod (17) is plugged into the positioning hole (14).

5. A centrifugal pump bearing drainage sealing structure according to claim 1, Features: A sealing groove (19) is provided on the surface of the bearing cover (3); a sealing sleeve (7) is movably sleeved on the outer surface of the rotating shaft (2); the sealing sleeve (7) is rotatably connected to the sealing groove (19); a fixing hole (20) is provided on the surface of the sealing sleeve (7) corresponding to the rotating shaft (2); and a fixing bolt (21) is threadedly connected to the inner wall of the fixing hole (20) corresponding to the rotating shaft (2).

6. A centrifugal pump bearing drainage sealing structure according to claim 3, Features: A pull block (12) is fixed in the middle of the top surface of the arc-shaped connecting rod (10).

Images