CN212774901U - Packing structure of circulating pump - Google Patents
Packing structure of circulating pump Download PDFInfo
- Publication number
- CN212774901U CN212774901U CN202020977785.9U CN202020977785U CN212774901U CN 212774901 U CN212774901 U CN 212774901U CN 202020977785 U CN202020977785 U CN 202020977785U CN 212774901 U CN212774901 U CN 212774901U
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- China
- Prior art keywords
- packing
- pump
- pump case
- pump shaft
- cover
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Abstract
The utility model discloses a packing structure of circulating pump, including pump case, pump shaft, packing cover suit is fixed in the pump shaft outside, and the packing cup joints in packing cover outside, has rolling device between packing and the packing cover, and the pump case cup joints in the packing outside, and the fixed setting of pump case, and the one end of pump case has the cavity, and the packing is installed in the cavity of pump case, the other end and the pump case of pump shaft pass through seal structure and are connected. The utility model has the advantages that: the installation rolling device between packing and the packing cover can reduce friction and loss between the two, and the poor problem of leakproofness for reducing to set up the rolling device and bring, the leakage quantity of cooling water is reduced to the seal structure of pump shaft tail end.
Description
Technical Field
The utility model relates to a circulating pump especially relates to a circulating pump packing structure.
Background
The cooling water circulating pump is an important auxiliary equipment of a thermal power plant, and has the function of sending a large amount of cooling water into a steam turbine condenser to cool and condense exhaust steam discharged by a steam turbine, so that the vacuum degree in the condenser is maintained. When the circulating pump packing fails, the conveying capacity of cooling water is insufficient due to insufficient pump output, the vacuum degree of the unit is directly influenced, and the output of the unit is reduced.
At present stage water pump is at the operation in-process, and the packing is as sealing device, and packing cover are dry friction contact when rotating, cause the packing loss, and long-term operation makes packing sealing performance descend, and the circulating water leaks in a large number, leads to equipment to shut down when serious, therefore the packing needs periodic replacement as the loss piece, wastes time and energy.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: how to solve packing department among the prior art and easily reveal, the hard problem of consumptive material.
The utility model discloses a following technical means realizes solving above-mentioned technical problem:
the utility model provides a packing structure of circulating pump, includes pump case, pump shaft, packing cover, and packing cover suit is fixed in the pump shaft outside, and the packing cup joints at packing cover outside, has the rolling device between packing and the packing cover, and the pump case cup joints in the packing outside, and the fixed setting of pump case, and the one end of pump case has the cavity, and the packing is installed in the cavity of pump case, the other end and the pump case of pump shaft pass through seal structure and are connected.
The utility model discloses at the rotatory in-process of pump shaft, the packing cover is together synchronous revolution with the pump shaft is fixed, and the pump case is static part to it is fixed with the packing, installs rolling device between packing and the packing cover, can reduce friction and loss between the two, for reducing the poor problem of leakproofness that sets up rolling device and bring, the seal structure of pump shaft tail end realizes sealedly, can reduce the leakage volume of cooling water.
Preferably, the one end that seal structure was kept away from to the cavity is the opening, and the packing structure of circulating pump still includes the ring flange, and the ring flange is fixed the setting, and the ring flange cup joints in the pump shaft outside to stretch into the cavity butt and sheathe in the packing by the opening part.
Preferably, the sealing structure is a tooth seal, and the inner wall of the pump shell is provided with a plurality of teeth arranged at intervals.
Preferably, the sealing structure is a tooth seal, the inner wall of the pump casing is provided with a plurality of teeth arranged at intervals, the outer wall of the pump shaft is provided with a plurality of teeth arranged at intervals, and the teeth on the pump casing and the teeth on the pump shaft are arranged in a crossed manner.
Through tooth seal structure is comparatively simple, uses with the packing cooperation, simple structure, sealed effectual.
Preferably, the rolling device is a plurality of balls arranged at intervals.
Preferably, the packing set is provided with a ball groove for placing balls on the inner wall.
Preferably, the packing sleeve is provided with a ball groove for placing balls on the outer wall. The ball groove is used for limiting the ball, the ball is prevented from rolling out, and the packing and/or the packing sleeve are/is provided with the ball groove according to requirements.
Preferably, the balls are the same in size and are uniformly arranged between the packing and the packing sleeve. The stress is uniform.
The utility model has the advantages that:
(1) in the rotating process of the pump shaft, the packing sleeve and the pump shaft are fixed together to rotate synchronously, the pump shell is a static part and fixes the packing, the rolling device is arranged between the packing and the packing sleeve, the friction and the loss between the packing and the packing sleeve can be reduced, and the sealing structure at the tail end of the pump shaft reduces the leakage amount of cooling water in order to reduce the problem of poor sealing caused by the arrangement of the rolling device;
(2) the tooth sealing structure is simple, and is matched with a packing for use, so that the structure is simple, and the sealing effect is good;
(3) the ball groove is used for limiting the ball, the ball is prevented from rolling out, and the packing and/or the packing sleeve are/is provided with the ball groove according to requirements.
Drawings
Fig. 1 is a schematic structural diagram of a packing structure of a circulation pump according to an embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic view of another sealing arrangement;
fig. 4 is an enlarged view at B.
Reference numbers in the figures: 1. a pump housing; 2. a pump shaft; 3. packing; 4. packing sleeve; 5. a flange plate; 6. and a ball.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The first embodiment is as follows:
as shown in figure 1, a packing structure of circulating pump, including pump case 1, pump shaft 2, packing 3, packing cover 4, ring flange 5, 4 suits of packing cover are fixed and are outside at pump shaft 2, and packing 3 cup joints outside 4 at packing cover, has rolling device between packing 3 and the packing cover 4, the right-hand member and the pump case 1 of pump shaft 2 pass through seal structure and are connected.
The diameter of the left end of the pump shaft 2 is smaller than the diameter of the right end, the packing sleeve 4 is installed at one section with a smaller diameter, the outer wall of the packing sleeve 4 is the same as the diameter of the end with a larger diameter of the pump shaft 2, the length of the packing sleeve 4 is longer than that of the packing 3, and the packing sleeve 4 covers the packing 3.
The left end of pump case 1 has the axial cavity, the left end opening of cavity, the right-hand member forms the step with seal structure, pump case 1 cup joints in packing 3 outsidely, and pump case 1 is fixed to be set up, packing 3 is installed in the cavity of pump case 1, and closely laminate with the cavity, ring flange 5 is fixed to be set up, ring flange 5 cup joints in 2 outsidess of pump shaft, and stretch into the interior butt of cavity on packing cover 4 by the opening part of left end, pump case 1 is fixed with packing 3 with ring flange 5 jointly.
When the sealing structure meets the sealing requirement, the inner diameter of the packing 3 is slightly larger than the outer diameter of the packing sleeve 4, so that the dry friction between the packing 3 and the packing sleeve 4 is reduced, and the loss rate of the packing 3 is reduced.
This embodiment is at 2 rotatory in-process of pump shaft, and packing cover 4 is fixed synchronous revolution together with pump shaft 2, and pump case 1 is fixed and is static part with ring flange 5 to fixed with packing 3, installation rolling device between packing 3 and the packing cover 4 can reduce friction and loss between the two, for the poor problem of leakproofness that the reduction set up rolling device and bring, the seal structure of 2 tail ends of pump shaft reduces the leakage quantity of cooling water.
Example two:
as shown in fig. 1 and 2, in the present embodiment, on the basis of the first embodiment, the sealing structure is a tooth seal;
the seal structure of the right end of the pump shell 1 is teeth arranged on the inner wall of the pump shell 1, the teeth are evenly arranged at intervals, the left end of each tooth is sealed with the right end of the packing sleeve 4, and the right end of each tooth is sealed with one section of the pump shaft 2 with a larger diameter.
Or as shown in fig. 3, the inner wall of the pump case 1 is provided with a plurality of teeth arranged at intervals, the outer wall of the pump shaft 2 is provided with a plurality of teeth arranged at intervals, and the teeth on the pump case 1 and the teeth on the pump shaft 2 are arranged in a crossed manner to form a sealing structure.
The tooth sealing structure is simple, simple in structure and good in sealing effect.
Sealing may also be performed by other means, such as labyrinth seals, mechanical seals, etc.
Example three:
as shown in fig. 1 and 4, in addition to the first or second embodiment, the rolling device is a plurality of balls 6 arranged at intervals.
A ball groove for placing a ball 6 can be formed on the inner wall of the packing 3; or set up the ball groove that is used for ball 6 to place on the outer wall of packing cover 4, perhaps all set up the ball groove on packing 3 and packing cover 4, all set up on packing 3 and packing cover 4 in this embodiment.
The ball groove is for adapting to the setting of ball 6, and ball groove size slightly is greater than ball 6, sets up the degree of depth in ball groove according to the setting mode, if only setting of packing 3 or packing cover 4, then need set up the ball groove degree of depth darker, if packing 3 or packing cover 4 all set up the ball groove, then need not to set up darker, as long as guarantee that the ball groove can carry on spacingly to ball 6, prevent that ball 6 from rolling out can.
The packing is characterized in that the number of the balls 6 is three, the balls are the same in size, and the balls are uniformly arranged between the packing 3 and the packing sleeve 4, so that the stress is uniform.
The balls 6 can also be replaced by rollers, and rolling can also be achieved. The friction and the loss between the packing 3 and the packing sleeve 4 are reduced.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The utility model provides a packing structure of circulating pump, its characterized in that includes pump case, pump shaft, packing cover, and packing cover suit is fixed outside the pump shaft, and the packing cup joints outside packing cover, has the rolling device between packing and the packing cover, and the pump case cup joints outside packing, and the fixed setting of pump case, and the one end of pump case has the cavity, and the packing is installed in the cavity of pump case, the other end and the pump case of pump shaft pass through seal structure and are connected.
2. The packing structure of the circulation pump according to claim 1, wherein the end of the cavity away from the sealing structure is an opening, the packing structure of the circulation pump further comprises a flange plate, the flange plate is fixedly arranged, and the flange plate is sleeved outside the pump shaft and extends into the cavity from the opening to abut against the packing sleeve.
3. The packing structure of a circulation pump according to claim 1, wherein the sealing structure is a tooth seal, and the inner wall of the pump housing is provided with a plurality of teeth arranged at intervals.
4. The packing structure of a circulation pump according to claim 1, wherein the sealing structure is a tooth seal, the inner wall of the pump casing is provided with a plurality of teeth arranged at intervals, the outer wall of the pump shaft is provided with a plurality of teeth arranged at intervals, and the teeth on the pump casing and the teeth on the pump shaft are arranged in a crossed manner.
5. The packing structure of a circulation pump according to claim 1, wherein the rolling means is a plurality of balls disposed at intervals.
6. The packing structure of a circulation pump according to claim 5, wherein the packing has a ball groove for a ball to be placed on an inner wall thereof.
7. The packing structure of a circulation pump according to claim 5, wherein the packing sleeve has a ball groove for ball placement on an outer wall thereof.
8. The packing structure of a circulation pump according to claim 5, wherein the balls are the same size and are uniformly installed between the packing and the packing sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020977785.9U CN212774901U (en) | 2020-06-01 | 2020-06-01 | Packing structure of circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020977785.9U CN212774901U (en) | 2020-06-01 | 2020-06-01 | Packing structure of circulating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212774901U true CN212774901U (en) | 2021-03-23 |
Family
ID=75070062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020977785.9U Expired - Fee Related CN212774901U (en) | 2020-06-01 | 2020-06-01 | Packing structure of circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212774901U (en) |
-
2020
- 2020-06-01 CN CN202020977785.9U patent/CN212774901U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210323 |
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| CF01 | Termination of patent right due to non-payment of annual fee |