CN220185423U

CN220185423U - Single-end-face mechanical sealing device for pump

Info

Publication number: CN220185423U
Application number: CN202321972583.5U
Authority: CN
Inventors: 金云忠; 王美清; 李成; 覃方浩
Original assignee: Jiashan Tianyi Sealing Co ltd
Current assignee: Jiashan Tianyi Sealing Co ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2023-12-15
Anticipated expiration: 2033-07-26

Abstract

The utility model relates to the field of single-end-face mechanical sealing devices and discloses a single-end-face mechanical sealing device for a pump, which comprises a central shaft, wherein a sealing shell is arranged on the outer side of the central shaft, a plurality of first thread grooves are formed in the sealing shell, first bolts are connected to the first thread grooves in a threaded mode, a circle of positioning blocks are fixedly arranged in the sealing shell, a cushion block is arranged on one side of the positioning blocks in a sliding mode, a first sealing ring is arranged on one side of the cushion block, and a first sealing block is arranged on one side of the cushion block. According to the utility model, the positioning block is arranged on one side of the sealing shell to position the sealing device, so that the sealing device is prevented from being deviated during rotation and incapable of being sealed, meanwhile, the first sealing ring is arranged on one side of the cushion block to provide tightness for the rotation of the pump body, and the first sealing ring is clamped by the first sealing block to prevent deviation during operation.

Description

Single-end-face mechanical sealing device for pump

Technical Field

The utility model relates to the field of single-end-face mechanical sealing devices, in particular to a single-end-face mechanical sealing device for a pump.

Background

A pump is a mechanical device for transporting and lifting liquid, and during operation of the pump, hydraulic forces cause the pump bearings to exert an outward force and relative movement between the rotating and stationary parts of the pump, which movement causes liquid flow between the pump bearings and the seal gap, thereby affecting the performance and life of the pump.

The common pump inevitably causes liquid leakage or gas entering when in use, thereby reducing the service life of the pump, and in addition, the common single-end surface mechanical seal has only one sealing ring, so that the leakage problem is easy to occur under the conditions of high speed, high temperature and high pressure, the sealing gasket is generally sealed by the cooperation of the pressure of a spring and the sealing gasket, the sealing gasket is damaged, and frequent replacement and inspection are required.

Accordingly, one skilled in the art would be able to provide a single-ended mechanical seal for a pump that addresses the problems set forth in the background above.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a single-end-face mechanical sealing device for a pump, which is provided with a positioning block to prevent the sealing device from being deviated during rotation, a first sealing ring is arranged to provide tightness for the rotation of a pump body, the sealing property of the sealing device is also increased by the first sealing block, a first bolt is used for fixing, the sealing strip is used for increasing the tightness for the sealing device, a second sealing ring and a third sealing ring are arranged on the inner side of a shell so as to increase the tightness of the sealing device, and meanwhile, the second sealing shell is prevented from being incapable of achieving the tightness, so that guarantee is provided for the sealing device.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the single-end-face mechanical sealing device for the pump comprises a central shaft, wherein a sealing shell is arranged on the outer side of the central shaft, a plurality of first thread grooves are formed in the sealing shell, first bolts are connected to the first thread grooves in a threaded mode, a circle of positioning blocks are fixedly arranged in the sealing shell, a cushion block is arranged on one side of the positioning blocks in a sliding mode, a first sealing ring is arranged on one side of the cushion block, and a first sealing block is arranged on one side of the cushion block;

through above-mentioned technical scheme, set up the locating piece and fix a position sealing device, avoid sealing device can take place the skew when rotating, set up first sealing washer in one side of cushion, provide the leakproofness when rotating for the pump body, use first bolt to fix the seal shell, prevent to appear moving during the operation.

Further, one side of the first sealing block is provided with a circle of first groove, a limiting block is arranged in the first groove, and one side of the limiting block is fixedly provided with a second sealing block;

through the technical scheme, the limiting block is matched with the first groove, so that the second sealing block is prevented from being deviated during operation.

Further, a second groove is formed in one side of the second sealing block, and a sealing strip is arranged in the second groove;

through above-mentioned technical scheme, set up the second recess and set up the sealing strip in the second recess, make sealing strip and shell cooperate, avoid liquid leakage or gaseous entering.

Further, a shell is arranged on the outer side of the central shaft, a second sealing ring is arranged in the shell, and a third sealing ring is arranged in the shell;

through above-mentioned technical scheme, at the internally mounted second sealing washer and the third sealing washer of shell, can increase the leakproofness for sealing device, can also provide the leakproofness for it when the sealing strip takes place to squint.

Further, a plurality of second thread grooves are formed in the outer side of the shell;

through the technical scheme, the outer side of the shell is provided with the plurality of second thread grooves, so that the shell can be conveniently connected by using bolts.

Further, a plurality of second thread grooves are in threaded connection with second bolts;

through the technical scheme, the second bolt is connected to the second thread groove, and the shell and the central shaft can be fixed by using the second bolt.

Further, a U-shaped groove is formed in the top end of the central shaft;

through the technical scheme, the impeller can be fixed by arranging the U-shaped groove at the central shaft and installing the U-shaped block.

Further, a third thread groove is formed in the outer side of the central shaft;

through the technical scheme, the third thread groove is formed in the outer side of the central shaft, so that the screw cap can be used for clamping the impeller conveniently.

The utility model has the following beneficial effects:

1. according to the single-end-face mechanical sealing device for the pump, the positioning block is arranged on one side of the sealing shell, the sealing device is positioned, the situation that the sealing device is deviated and cannot be sealed during rotation is avoided, meanwhile, the first sealing ring is arranged on one side of the cushion block, sealing performance is provided for the pump body during rotation, the first sealing ring is clamped by the first sealing block, the deviation during operation is prevented, meanwhile, the sealing performance of the sealing device is improved by the first sealing block, the sealing effect is guaranteed, meanwhile, the sealing shell is fixed by the first bolt, the movement during operation is prevented, and the sealing cannot be performed correctly.

2. According to the single-end-face mechanical sealing device for the pump, the limiting block is arranged on one side of the second sealing block and is limited with the first sealing block, so that the second sealing block is prevented from being deviated during use, and the sealing strip is arranged between the second sealing block and the shell, so that the tightness of the sealing device can be improved, and the situation that gaps exist between the second sealing block and the shell during use of the device, and the sealing effect cannot be achieved is avoided.

3. According to the single-end-face mechanical sealing device for the pump, the second sealing ring and the third sealing ring are arranged on the inner side of the shell, and meanwhile, the second sealing ring and the third sealing ring are attached to the central shaft, so that the sealing performance of the sealing device is improved, meanwhile, the situation that the second sealing block cannot be sealed with the shell correctly, the sealing performance cannot be achieved can be prevented, and the second sealing ring and the third sealing ring provide guarantee to avoid the situation that the second sealing block cannot be sealed.

Drawings

FIG. 1 is an isometric view of a single-ended mechanical seal device for a pump according to the present utility model;

FIG. 2 is a side view of a single-ended mechanical seal device for a pump with a housing removed;

FIG. 3 is a front view of a single-ended mechanical seal for a pump according to the present utility model;

FIG. 4 is a side view of a single-ended mechanical seal for a pump according to the present utility model;

FIG. 5 is a side cross-sectional view of a single-ended mechanical seal for a pump according to the present utility model;

fig. 6 is a partial enlarged view at a in fig. five.

Legend description:

1. a central shaft; 2. a sealed housing; 3. a first thread groove; 4. a first bolt; 5. a positioning block; 6. a cushion block; 7. a first seal ring; 8. a first sealing block; 9. a first groove; 10. a limiting block; 11. a second sealing block; 12. a second groove; 13. a sealing strip; 14. a housing; 15. a second seal ring; 16. a third seal ring; 17. a second thread groove; 18. a second bolt; 19. a U-shaped groove; 20. and a third thread groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-6, one embodiment provided by the present utility model is: the utility model provides a single-end face mechanical seal device for pump, including center pin 1, center pin 1's the outside is provided with seal shell 2, a plurality of first thread grooves 3 have been seted up to seal shell 2's inside, a plurality of first thread grooves 3 department equal threaded connection has first bolt 4, seal shell 2's inside is fixed to be provided with round locating piece 5, one side of locating piece 5 is provided with cushion 6 in a sliding way, one side of cushion 6 is provided with first sealing washer 7, one side of cushion 6 is provided with first sealing piece 8, set up the locating piece and fix a position sealing device, avoid sealing device can take place the skew when rotating, set up first sealing washer in one side of cushion, provide the leakproofness when rotating for the pump body, use first bolt to fix seal shell, prevent to appear moving during the operation.

One side of first sealing block 8 has seted up round first recess 9, the inside of first recess 9 is provided with stopper 10, one side of stopper 10 is fixed to be provided with second sealing block 11, make stopper and first recess cooperate, avoid the second sealing block to take place the off tracking when the operation, second recess 12 has been seted up to one side of second sealing block 11, be provided with sealing strip 13 in the second recess 12, set up the second recess and set up the sealing strip in the second recess, make sealing strip and shell cooperate, avoid liquid leakage or gaseous entering, the outside of center pin 1 is provided with shell 14, the inside of shell 14 is provided with second sealing washer 15, the inside of shell 14 is provided with third sealing washer 16, internally mounted second sealing washer and the third sealing washer at the shell, can increase the leakproofness for sealing device, can also provide the leakproofness for it when the sealing strip takes place the skew, a plurality of second thread grooves 17 have been seted up in the outside of shell, can be convenient for use the bolt to connect, a plurality of second thread grooves 17 department threaded connection have second 18, the second thread groove 18 has been set up at the second bolt groove 17 department threaded connection, the center pin is provided with the second center pin 1 in the second thread groove, the profile of screw thread groove is set up with the center pin type impeller 1 in the outside the second center pin, the profile is set up with the second center pin groove is fixed with the profile of screw thread groove is set up at the outside profile of the center pin 1, the center pin is used to the second thread groove is set up at the profile of the center pin, the profile is fixed outside profile of screw groove is set up.

Working principle: when the sealing device is used, the second sealing ring 15 and the third sealing ring 16 are firstly arranged on the inner side of the shell 14, the central shaft 1 is inserted into the shell 14, the threaded hole of the central shaft 1 is aligned with the second threaded groove 17 at the position of the shell 14, the central shaft 1 and the shell 14 are fixed by using the second bolt 18, the cushion block 6 is aligned with the positioning block 5 to be arranged in the sealing shell 2, the first sealing ring 7 is arranged on one side of the cushion block 6, the first sealing block 8 is arranged on one side of the cushion block 6 again, the limiting block 10 is aligned with the first groove 9 to be arranged on one side of the first sealing block 8, the sealing strip 13 is arranged on one side of the second sealing block 11, the first bolt 4 is matched with the first threaded groove 3, the sealing device is arranged through the central shaft 1, the shell 14 is attached to the second sealing block 11, the first bolt 4 is fastened again, the sealing shell 2 is fixed with the central shaft 1, and movement is avoided during operation.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. Single-end-face mechanical sealing device for pumps, comprising a central shaft (1), characterized in that: the utility model discloses a sealing device for the automobile engine, including center pin (1), sealing shell (2) is provided with in the outside of center pin (1), a plurality of first screw thread groove (3) have been seted up to the inside of sealing shell (2), and a plurality of equal threaded connection in first screw thread groove (3) department has first bolt (4), the inside of sealing shell (2) is fixed to be provided with round locating piece (5), one side of locating piece (5) is provided with cushion (6) in a sliding way, one side of cushion (6) is provided with first sealing washer (7), one side of cushion (6) is provided with first sealing piece (8).

2. A single-ended mechanical seal for a pump according to claim 1, wherein: one side of the first sealing block (8) is provided with a circle of first groove (9), a limiting block (10) is arranged in the first groove (9), and one side of the limiting block (10) is fixedly provided with a second sealing block (11).

3. A single-ended mechanical seal for a pump according to claim 2, wherein: a second groove (12) is formed in one side of the second sealing block (11), and a sealing strip (13) is arranged in the second groove (12).

4. A single-ended mechanical seal for a pump according to claim 1, wherein: the outer side of the central shaft (1) is provided with a shell (14), the inside of the shell (14) is provided with a second sealing ring (15), and the inside of the shell (14) is provided with a third sealing ring (16).

5. The single-ended mechanical seal device for a pump of claim 4, wherein: a plurality of second thread grooves (17) are formed in the outer side of the shell (14).

6. A single-ended mechanical seal for a pump as defined in claim 5 wherein: a plurality of second thread grooves (17) are in threaded connection with second bolts (18).

7. A single-ended mechanical seal for a pump according to claim 1, wherein: the top end of the central shaft (1) is provided with a U-shaped groove (19).

8. A single-ended mechanical seal for a pump according to claim 1, wherein: a third thread groove (20) is formed in the outer side of the central shaft (1).