CN216200521U

CN216200521U - Integrated mechanical seal for fire pump

Info

Publication number: CN216200521U
Application number: CN202122742021.9U
Authority: CN
Inventors: 应志伟
Original assignee: Zhejiang Zhongji Mechanical Seal Co ltd
Current assignee: Zhejiang Zhongji Mechanical Seal Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-05
Anticipated expiration: 2031-11-10

Abstract

The utility model relates to the field of mechanical seal, in particular to a cartridge mechanical seal for a fire pump, which comprises: the shaft sleeve is provided with a first boss at one end of the side wall of the shaft sleeve, a fixing ring is arranged at the other end of the side wall of the shaft sleeve, and a toggle column is fixed on a first step; the middle part of the static ring seat is provided with a first through hole, and one side of the first through hole, which is close to the first boss, is also provided with an accommodating step; the static ring is fixedly arranged in the accommodating step; the movable ring assembly is sleeved on the shaft sleeve, the east ring assembly is positioned between the static ring and the first boss, the movable ring assembly comprises a connecting ring and a contact ring fixed on one side of the connecting ring close to the static ring, and a clamping groove is formed in the inner ring of the connecting ring; and one end of the spring is fixed on the first step, and the other end of the spring is fixedly arranged on the connecting ring. The utility model adopts integrated seal, when in use, only the shaft sleeve and the rotating shaft are fixed, and the static ring seat and the machine base are fixed, thus the utility model has excellent sealing performance and is very suitable for fire pumps.

Description

Integrated mechanical seal for fire pump

Technical Field

The utility model relates to the field of mechanical seals, in particular to a cartridge mechanical seal for a fire pump.

Background

The mechanical seal is a shaft seal device of a rotating machine. In the equipment such as centrifugal pump, because the transmission shaft penetrates inside and outside the equipment, a circumferential gap exists between the shaft and the equipment, the medium in the equipment leaks outwards through the gap, if the pressure in the equipment is lower than the atmospheric pressure, air leaks into the equipment, and therefore a shaft seal device for preventing leakage, namely a mechanical seal, is required.

The fire pump is used in the pump on the fire-fighting equipment, and it needs to satisfy totally enclosed, leak-free and corrosion-resistant, and these requirements all need the pump body to have fine isolated effect in the external world, and general mechanical seal's effect is not ideal enough, has the quality hidden danger.

Therefore, there is a need for an improved structure that overcomes the above-mentioned deficiencies.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a cartridge mechanical seal for a fire pump, which is realized by the following technical scheme:

a cartridge mechanical seal for a fire pump, comprising: the side wall of the shaft sleeve is provided with a boss at one end, the other end of the side wall of the shaft sleeve is detachably and fixedly provided with a fixing ring, and a toggle column is fixed on the boss; the middle part of the static ring seat is provided with a through hole, the shaft sleeve penetrates through the through hole, the static ring seat is positioned between the boss and the fixed ring, the static ring seat is not contacted with the shaft sleeve, and one side of the through hole, which is close to the boss, is also provided with an accommodating step; the static ring is fixedly arranged in the accommodating step; the movable ring assembly is sleeved on the shaft sleeve and is positioned between the static ring and the boss, the movable ring assembly comprises a connecting ring and a contact ring fixed on one side of the connecting ring close to the static ring, a clamping groove is formed in the inner ring of the connecting ring and is in contact with the shifting column, and the contact ring is not in contact with the shaft sleeve; and one end of the spring is fixed on the boss, and the other end of the spring is fixedly arranged on the connecting ring.

In the above technical scheme: the shaft sleeve is used for being connected with the rotating shaft and penetrating through a gap between the rotating shaft and the equipment part; the boss and the fixed ring limit the positions of the static ring seat, the static ring and the movable ring component so as to achieve integrated sealing; the static ring seat is used for connecting the technical scheme with the machine base and limiting the rotation of the static ring; the static ring is contacted with the contact ring to achieve sealing; the movable ring assembly is used for rotating together with the shaft sleeve; the spring is used for keeping the contact ring in contact with the static ring.

The utility model is further provided with: still include the checkpost, it is a plurality of the checkpost is fixed to be set up on the retaining ring, just checkpost one end with quiet ring seat fixed connection.

In the above technical scheme: the clip is used for keeping the relative position of the static ring seat and the fixed ring.

The utility model is further provided with: the inner wall of the shaft sleeve is at least provided with a first annular groove, and each first annular groove is internally provided with a first rubber ring.

In the above technical scheme: the first rubber ring enables the shaft sleeve and the rotating shaft to be tightly contacted so as to ensure the sealing performance of the shaft sleeve.

The utility model is further provided with: be provided with the second annular on the inner wall of go-between, be provided with the second rubber circle in the second annular, the second rubber circle with the boss contact.

In the above technical scheme: the second rubber ring enables the movable ring assembly to be tightly contacted with the shaft sleeve so as to ensure the sealing performance of the movable ring assembly.

The utility model is further provided with: the outer wall of the static ring is provided with a third ring groove, a third rubber ring is arranged in the third ring groove, and the third rubber ring is in contact with the static ring seat.

In the above technical scheme: the third rubber ring enables the static ring to be in close contact with the static ring seat, and the sealing performance of the static ring seat is ensured.

The utility model is further provided with: the fixed ring seat is far away from be provided with the fourth annular on the side of retainer plate, be provided with the fourth rubber circle in the fourth annular inslot.

In the above technical scheme: the fourth rubber circle is used for increasing the frictional force between quiet ring seat and the frame to ensure the stability of this technical scheme after the installation.

The utility model is further provided with: the connecting ring is not in contact with the shaft sleeve.

In the above technical scheme: the connecting ring is not in contact with the shaft sleeve, and the second rubber ring is in contact with the shaft sleeve, so that the contact area can be reduced, and the friction force is reduced.

The utility model is further provided with: the cross-sectional shape of the contact ring is L-shaped.

In the above technical scheme: the cross-sectional shape of contact ring is "L" type for the contact surface of contact ring and quiet ring meets and reduces, thereby has reduced frictional force, makes the relative rotation of rotating ring subassembly and quiet ring keep smooth state.

The utility model discloses a cartridge mechanical seal for a fire pump, which is compared with the prior art:

1. the integrated seal is adopted, and the mechanical seal can be subjected to tightness test before installation, so that the excellent sealing performance of the integrated seal after installation is ensured, and the integrated seal is very suitable for fire pumps requiring high tightness;

2. the sectional area of the contact ring is L-shaped, so that the friction force is reduced, and the service life of the product is prolonged.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the bushing of the present invention;

FIG. 3 is a cross-sectional view of the stationary ring seat of the present invention;

FIG. 4 is a cross-sectional view of a stationary ring of the present invention;

figure 5 is a cross-sectional view of a connector ring of the present invention.

The corresponding part names indicated by the numbers and letters in the drawings: 10-shaft sleeve; 101-a boss; 102-a toggle post; 103-a first ring groove; 103 a-a first rubber ring; 20-a fixed ring; 30-stationary ring seat; 301-a through hole; 302-accommodation step; 303-a fourth ring groove; 303 a-a fourth rubber ring; 40-stationary ring; 401-a third ring groove; 401 a-a third rubber ring; 50-a rotating ring assembly; 501-connecting ring; 501 a-card slot; 502-contact ring; 503-a second ring groove; 503 a-a second rubber ring; 60-a spring; 70-clip.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

As shown in fig. 1 to 5, the present invention provides a cartridge mechanical seal for a fire pump, comprising: the side wall of the shaft sleeve 10 is provided with a boss 101 at one end, a fixing ring 20 is detachably and fixedly arranged at the other end, and a toggle column 102 is fixed on the boss 101; a through hole 301 is formed in the middle of the stationary ring seat 30, the shaft sleeve 10 penetrates through the through hole 301, the stationary ring seat 30 is located between the boss 101 and the fixed ring 20, the stationary ring seat 30 is not in contact with the shaft sleeve 10, and an accommodating step 302 is further formed in one side, close to the boss 101, of the through hole 301; a stationary ring 40, the stationary ring 40 being fixedly disposed within the receiving step 302; the movable ring assembly 50 is sleeved on the shaft sleeve 10, the movable ring assembly 50 is located between the stationary ring 40 and the boss 101, the movable ring assembly 50 comprises a connecting ring 501 and a contact ring 502 fixed on one side, close to the stationary ring 40, of the connecting ring 501, a clamping groove 501a is formed in the inner ring of the connecting ring 501, the clamping groove 501a is in contact with the toggle column 102, and the contact ring 502 is not in contact with the shaft sleeve 10; and one end of the spring 60 is fixed on the boss 101, and the other end of the spring 60 is fixedly arranged on the connecting ring 501. Wherein, 3 toggle columns 102 are arranged on one side of the boss 101 close to the fixed ring 20; 4 fixing holes are uniformly formed in the stationary ring seat 30, and the stationary ring seat 30 is fixed on the base through the matching of bolts and the fixing holes; the edge of the accommodating step 302 is also provided with a chamfer so as to facilitate the placement of the stationary ring 40, and the accommodating step 302 is also provided with 3 axial pin shafts; one end of the stationary ring 40 is provided with 3 pin holes corresponding to the pin shafts, one side of each pin hole is open and semicircular, and the pin shafts are matched with the pin holes, so that the stationary ring 40 does not rotate relative to the stationary ring seat 30; the connecting ring 501 is evenly provided with 3 placing holes, the springs 60 are arranged in the placing holes, the number of the clamping grooves 501a is 3, the clamping grooves 501a are evenly placed, and the clamping grooves 501a and the placing holes are arranged in a staggered mode.

As shown in fig. 1, the present invention provides a cartridge mechanical seal for a fire pump, comprising: the fixing ring further comprises a plurality of clips 70, the clips 70 are fixedly arranged on the fixing ring 20, and one end of each clip 70 is fixedly connected with the fixed ring seat 30. Wherein, one side that quiet ring seat 30 is close to retainer plate 20 is provided with annular joint groove, and checkpost 70 is the cuboid, be provided with on checkpost 70's the bottom surface with quiet ring seat 30 joint mouth, still run through on checkpost 70 and be provided with the second connecting hole, checkpost 70 is together fixed with retainer plate 20 through the second connecting hole, and the relative position that rethread joint mouth and joint groove make quiet ring seat 30 fixed with checkpost 70. After the sealing performance test is carried out, the states of the parts of the product can be kept consistently.

As shown in fig. 1 and 2, the present invention provides a cartridge mechanical seal for a fire pump, comprising: at least one first ring groove 103 is formed in the inner wall of the shaft sleeve 10, and a first rubber ring 103a is arranged in each first ring groove 103. The number of the first ring grooves 103 is two, and correspondingly, the number of the first rubber rings 103a is also two; the first rubber ring 103a is a fluorine rubber O-shaped ring.

As shown in fig. 1 and 5, the present invention provides a cartridge mechanical seal for a fire pump, comprising: a second annular groove 503 is formed in the inner wall of the connecting ring 501, a second rubber ring 503a is arranged in the second annular groove 503, and the second rubber ring 503a is in contact with the boss 101. Wherein, the second rubber ring 503a is a fluorine rubber O-ring.

As shown in fig. 1 and 4, the present invention provides a cartridge mechanical seal for a fire pump, comprising: be provided with third annular 401 on the outer wall of stationary ring 40, be provided with third rubber circle 401a in the third annular 401, third rubber circle 401a with stationary ring seat 30 contacts. Wherein, the third rubber ring 401a is a fluorine rubber O-shaped ring.

As shown in fig. 1 and 3, the present invention provides a cartridge mechanical seal for a fire pump, comprising: a fourth ring groove 303 is formed in one side face, far away from the fixed ring 20, of the stationary ring seat 30, and a fourth rubber ring 303a is arranged in the fourth ring groove 303. Wherein, the fourth rubber ring 303a is a fluorine rubber O-shaped ring.

As shown in fig. 1, the present invention provides a cartridge mechanical seal for a fire pump, comprising: the connection ring 501 does not contact the sleeve 10. Wherein, the connection ring 501 has a recess corresponding to the raised portion of the shaft sleeve 10, so that the connection ring and the raised portion do not contact each other, and only the second rubber ring 503a contacts the shaft sleeve 10, thereby reducing the friction force between the connection ring and the shaft sleeve, reducing the amount of wear, and prolonging the service life.

As shown in fig. 1, the present invention provides a cartridge mechanical seal for a fire pump, comprising: the contact ring 502 has an "L" shaped cross-section. Wherein, the external diameter that contact ring 502 is close to the terminal surface of quiet ring 40 is less than the external diameter of quiet ring 40 corresponding surface, and the internal diameter that contact ring 502 is close to the terminal surface of quiet ring 40 is greater than the internal diameter of quiet ring 40 corresponding surface to make even if contact ring 502 rocks a little along with connecting ring 501 in the axial direction, contact ring 502 also can be with quiet ring 40 full face contact, in order to guarantee that the atress of contact ring 502 is even.

The working principle of the utility model is as follows:

1. before leaving the factory, carrying out detection on the sealing performance of the utility model, and fixing the relative position of the stationary ring seat and the fixed ring by using a clip after the relative position is qualified;

2. the utility model is arranged on a fire pump, a shaft sleeve is fixedly connected with a rotating shaft, and a static ring seat is fixedly connected with a machine base; 3. taking down the clip;

4. the shaft sleeve rotates along with the rotating shaft, the rotating ring assembly rotates along with the shaft sleeve, the static ring keeps not rotating, and the contact ring and the static ring rotate and rub relatively;

5. the spring keeps the static ring in contact with the dynamic ring, so that the sealing performance is guaranteed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims

1. The utility model provides a cartridge type mechanical seal for fire pump which characterized in that includes:

the device comprises a shaft sleeve (10), wherein a boss (101) is arranged at one end of the side wall of the shaft sleeve (10), a fixing ring (20) is detachably and fixedly arranged at the other end of the side wall of the shaft sleeve (10), and a toggle column (102) is fixed on the boss (101);

the middle of the static ring seat (30) is provided with a through hole (301), the shaft sleeve (10) penetrates through the through hole (301), the static ring seat (30) is located between the boss (101) and the fixed ring (20), the static ring seat (30) is not in contact with the shaft sleeve (10), and one side, close to the boss (101), of the through hole (301) is further provided with an accommodating step (302);

a stationary ring (40), the stationary ring (40) being fixedly disposed within the containment step (302);

the movable ring assembly (50) is sleeved on the shaft sleeve (10), the movable ring assembly (50) is located between the static ring (40) and the boss (101), the movable ring assembly (50) comprises a connecting ring (501) and a contact ring (502) fixed to one side, close to the static ring (40), of the connecting ring (501), a clamping groove (501a) is formed in the inner ring of the connecting ring (501), the clamping groove (501a) is in contact with the toggle column (102), and the contact ring (502) is not in contact with the shaft sleeve (10);

one end of the spring (60) is fixed on the boss (101), and the other end of the spring (60) is fixedly arranged on the connecting ring (501).

2. The integrated mechanical seal for a fire pump according to claim 1, wherein: still include checkpost (70), a plurality of checkpost (70) are fixed to be set up on retainer plate (20), just checkpost (70) one end with quiet ring seat (30) fixed connection.

3. The integrated mechanical seal for a fire pump according to claim 2, wherein: the inner wall of the shaft sleeve (10) is at least provided with a first ring groove (103), and each first ring groove (103) is internally provided with a first rubber ring (103 a).

4. A cartridge type mechanical seal for a fire pump according to claim 3, wherein: the inner wall of the connecting ring (501) is provided with a second annular groove (503), a second rubber ring (503a) is arranged in the second annular groove (503), and the second rubber ring (503a) is in contact with the boss (101).

5. The integrated mechanical seal for a fire pump according to claim 4, wherein: be provided with third annular (401) on the outer wall of quiet ring (40), be provided with third rubber circle (401a) in third annular (401), third rubber circle (401a) with quiet ring seat (30) contact.

6. The integrated mechanical seal for a fire pump according to claim 5, wherein: the fixed ring seat (30) is far away from a side face of the fixed ring (20) is provided with a fourth ring groove (303), and a fourth rubber ring (303a) is arranged in the fourth ring groove (303).

7. The integrated mechanical seal for a fire pump as recited in claim 6, wherein: the connecting ring (501) is not in contact with the shaft sleeve (10).

8. The integrated mechanical seal for a fire pump according to claim 2, wherein: the cross-sectional shape of the contact ring (502) is 'L' shaped.