CN210343854U - Sealing structure of centrifugal pump and centrifugal pump - Google Patents
Sealing structure of centrifugal pump and centrifugal pump Download PDFInfo
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- CN210343854U CN210343854U CN201920959472.8U CN201920959472U CN210343854U CN 210343854 U CN210343854 U CN 210343854U CN 201920959472 U CN201920959472 U CN 201920959472U CN 210343854 U CN210343854 U CN 210343854U
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Abstract
The utility model relates to a centrifugal pump seals technical field, provides a seal structure and centrifugal pump of centrifugal pump, seal structure includes: a pump casing (1) formed with a housing chamber (11) and a fluid inlet (12); an impeller (2) disposed within the containment chamber, the impeller comprising an impeller body (21) and an impeller sealing ring (22) arranged coaxially with the fluid inlet; and an annular seal (4) detachably mounted to the centrifugal pump, wherein a first seal portion (41) is formed between the annular seal and a circumferential wall of the fluid inlet, and a second seal portion (42) is formed between the annular seal and the impeller seal ring. The seal structure of centrifugal pump can change annular seal spare alone, need not whole change impeller, reduce the use cost and the maintenance cost of centrifugal pump.
Description
Technical Field
The utility model relates to a centrifugal pump seals technical field, in particular to seal structure and centrifugal pump of centrifugal pump.
Background
Centrifugal pump wide application in coal chemical industry, thermal power, petrochemical field, in the centrifugal pump use, centrifugal pump input medium often contains the buggy, influences the long period of centrifugal pump, safe operation, leads to the wear-resisting welt entry sealing ring and the impeller sealing ring of centrifugal pump to be worn and torn easily, leads to the clearance seal structure between the two to be worn and torn, and the clearance increases for the flow reduction of centrifugal pump, the lift descends, can't continue to satisfy the operation demand. At present, the wear-resistant lining plate sealing ring and the impeller sealing ring respectively form an integrated structure with the wear-resistant lining plate and the impeller, cannot be repaired and independently replaced, and only can replace the new wear-resistant lining plate and the new impeller, so that the maintenance cost of the centrifugal pump is increased.
Accordingly, it would be desirable to have a seal structure for a centrifugal pump that overcomes or at least alleviates the above-mentioned deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to a sealing structure of a centrifugal pump to reduce the maintenance cost of the centrifugal pump.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a seal structure of a centrifugal pump, the seal structure comprising: a pump housing formed with a housing chamber and a fluid inlet; an impeller disposed within the containment chamber, the impeller including an impeller body and an impeller seal ring, the impeller seal ring being coaxially disposed with the fluid inlet; and an annular seal detachably mounted to the centrifugal pump, wherein a first seal portion is formed between the annular seal and a circumferential wall of the fluid inlet, and a second seal portion is formed between the annular seal and the impeller seal ring.
Preferably, the annular sealing member is sleeved on the periphery of the impeller sealing ring, the circumferential wall of the fluid inlet is sleeved on the periphery of the annular sealing member, the first sealing portion is a sealing ring arranged between the annular sealing member and the circumferential wall of the fluid inlet, and the second sealing portion is a gap sealing structure formed between the annular sealing member and the impeller sealing ring.
Preferably, the gap sealing structure comprises a first gap sealing part and a second gap sealing part, wherein an included angle is formed between a surface where the first gap sealing part is located and a surface where the second gap sealing part is located.
Preferably, seal structure including set up in hold the interior wear-resisting welt of cavity, wear-resisting welt fixed mounting in the pump case, wear-resisting welt include the welt cavity and with the coaxial welt sealing ring who arranges of fluid inlet, the impeller set up in the welt cavity, welt sealing ring cover is located annular seal's periphery.
Preferably, a third sealing portion is formed between the annular sealing member and the backing plate sealing ring.
Preferably, the third sealing portion is a sealing ring disposed between the annular sealing member and the liner sealing ring.
Preferably, the periphery of the annular sealing element is provided with a mounting boss corresponding to the wear-resistant lining plate, and a positioning pin is arranged between the mounting boss and the lining plate sealing ring.
Preferably, the diameter of the fluid inlet and the inner diameter of the annular sealing member are equal to the inner diameter of the impeller sealing ring, the fluid inlet is formed with a sealing member installation groove, the annular sealing member is at least partially arranged in the sealing member installation groove, the annular sealing member is provided with an impeller installation groove, and the impeller sealing ring is at least partially arranged in the impeller installation groove.
Preferably, a clearance fit is formed between the pump casing and the annular seal and between the wear liner and the annular seal in the axial direction of the fluid inlet.
According to another aspect of the present invention, there is provided a centrifugal pump provided with a sealing structure of the centrifugal pump according to the above.
Compared with the prior art, the seal structure of centrifugal pump has following advantage:
the seal structure of centrifugal pump realize the sealed between pump case and the impeller sealing ring through the annular seal spare of the centrifugal pump that detachable installed in, when the impeller sealing ring of centrifugal pump and/or annular seal spare were worn and torn and lead to unsatisfied user demand, can change annular seal spare alone, need not whole change impeller, reduce the use cost and the maintenance cost of centrifugal pump.
Compared with the prior art, the sealing structure of the centrifugal pump and the centrifugal pump has the same advantages, and the description is omitted.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic view of a sealing structure of a centrifugal pump according to an embodiment of the present invention.
Description of reference numerals:
1-pump shell, 11-accommodating chamber, 12-fluid inlet, 2-impeller, 21-impeller body, 22-impeller sealing ring, 3-wear-resistant lining plate, 31-lining plate sealing ring, 32-lining plate chamber, 4-annular sealing element, 41-first sealing part, 42-second sealing part, 43-third sealing part, 44-installation boss, 5-positioning pin and 6-pump cover.
Detailed Description
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
In addition, in the embodiments of the present invention, the terms "inside" and "outside" refer to the inside and the outside of the contour of the component itself.
The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.
According to an aspect of the present invention, there is provided a sealing structure of a centrifugal pump, see fig. 1, the sealing structure comprising: a pump housing 1, the pump housing 1 being formed with a housing chamber 11 and a fluid inlet 12; the impeller 2 is arranged in the accommodating chamber 11, the impeller 2 comprises an impeller body 21 and an impeller sealing ring 22, and the impeller sealing ring 22 is coaxially arranged with the fluid inlet 12; and an annular seal 4 to which the annular seal 4 is detachably attached, wherein a first seal portion 41 is formed between the annular seal 4 and the circumferential wall of the fluid inlet 12, and a second seal portion 42 is formed between the annular seal 4 and the impeller seal ring 22.
The sealing structure of the centrifugal pump realizes the sealing between the pump shell 1 and the impeller sealing ring 22 through the annular sealing piece 4 which is detachably arranged on the centrifugal pump, and when the impeller sealing ring 22 and/or the annular sealing piece 4 of the centrifugal pump are worn to cause that the use requirement is not met, the annular sealing piece 4 can be independently replaced without integrally replacing the impeller 2, so that the use cost and the maintenance cost of the centrifugal pump are reduced.
When the impeller seal ring 22 is worn seriously, the seal surface of the impeller seal ring 22 may be further processed (for example, turned, ground, or the like), and then a new annular seal 4 having a size corresponding to the size of the processed impeller seal ring 22 may be selected.
The arrangement of the annular sealing element 4, the fluid inlet 12 and the impeller sealing ring 22 can be selected according to actual needs, and the sealing requirement can be met, preferably, referring to fig. 1, the annular sealing element 4 is sleeved on the periphery of the impeller sealing ring 22, and the circumferential wall of the fluid inlet 12 is sleeved on the periphery of the annular sealing element 4, so that the sealing structure is compact in structure and good in sealing performance. Furthermore, the method is simple. The specific types of the first sealing portion 41 and the second sealing portion 42 may be appropriately selected according to actual needs, and preferably, the first sealing portion 41 is a sealing ring disposed between the annular sealing member 4 and the circumferential wall of the fluid inlet 12, and the second sealing portion 42 is a gap sealing structure formed between the annular sealing member 4 and the impeller sealing ring 22, the gap sealing structure utilizes a small gap between moving members to perform a sealing function, and has a simple and compact structure, a small size, a small friction force, a small amount of heat generation, and a long service life.
When the sealing performance of the second seal portion 42 is degraded, the annular seal 4 may be removed, the impeller seal ring 22 may be turned so that the outer peripheral surface thereof meets the use requirement, the outer diameter of the impeller seal ring 22 after the turning is reduced, and the corresponding annular seal 4 may be selected. The reduced size of the outer diameter of the impeller seal ring 22 can be selected according to actual wear and usage requirements. For the ring seal 4, a series of ring seals with different inner diameters can be manufactured, or a ring seal 4 with a smaller inner diameter can be manufactured, and then the ring seal 4 is further processed according to the outer diameter of the corresponding impeller seal ring 22 so as to have an appropriate inner diameter. The impeller 2 and the annular sealing element 4 (which can be used for other centrifugal pumps after being processed again after not meeting the use requirement of one centrifugal pump) can be reused for multiple times, so that the equipment maintenance cost is reduced.
Preferably, the gap sealing structure comprises a first gap sealing part and a second gap sealing part, wherein an included angle is formed between a surface where the first gap sealing part is located and a surface where the second gap sealing part is located, so that the sealing performance of the gap sealing structure is further improved. Referring to fig. 1, in the illustrated preferred embodiment, the interior of the annular seal 4 includes a first section with a larger inner diameter and a second section with a smaller inner diameter, a radially extending transition joint section is formed between the first and second sections, the first gap seal is an annular gap extending in the axial direction of the fluid inlet 12, and the second gap seal is a planar gap disposed between the end face of the impeller seal ring 22 and the inner wall of the transition joint section.
Preferably, seal structure is including setting up the wear-resisting welt 3 in holding the cavity 11, and wear-resisting welt 3 fixed mounting is in pump case 1, and wear-resisting welt 3 includes welt cavity 32 and the welt sealing ring 31 with fluid inlet 12 coaxial arrangement, and impeller 2 sets up in welt cavity 32, and the periphery of annular seal 4 is located to welt sealing ring 31 cover, and wear-resisting welt 3 can further improve seal structure's wearability, the life of extension centrifugal pump, and the periphery of annular seal 4 is located to welt sealing ring 31 cover, can further improve seal structure's intensity.
Preferably, a third sealing portion 43 is formed between the annular sealing member 4 and the backing plate sealing ring 31 to further improve the sealing performance of the sealing structure.
The specific structure of the third sealing portion 43 can be selected as required, and preferably, the third sealing portion 43 is a sealing ring disposed between the annular sealing member 4 and the inner periphery of the liner sealing ring 31.
Referring to fig. 1, in the illustrated embodiment, the first sealing portion 41 includes two O-rings arranged side by side, and two corresponding O-rings are formed in the circumferential wall of the fluid inlet 12, and more O-rings may be provided if desired. The third sealing portion 43 also includes two O-ring seals arranged side by side, and two corresponding seal ring mounting grooves are formed on the circumferential wall of the lining wear ring 31, and if necessary, more O-ring seals may be provided.
The mounting mode between annular seal 4 and the centrifugal pump can carry out appropriate selection according to actual need, for example, install in pump case 1 through threaded connection spare, through installation checkpost joint in wear-resisting welt 3 etc.. Preferably, the periphery of annular sealing member 4 is formed with the installation boss 44 corresponding to the wear-resisting welt 3, is provided with locating pin 5 between installation boss 44 and the welt sealing ring 31, simple structure, easy dismounting. Wherein, the quantity of locating pin 5 can carry out appropriate selection according to actual need, can satisfy seal structure's intensity demand can.
Preferably, the diameter of the fluid inlet 12 and the inner diameter of the annular sealing member 4 are equal to the inner diameter of the impeller sealing ring 22, the fluid inlet 12 is formed with a sealing member installation groove, the annular sealing member 4 is at least partially arranged in the sealing member installation groove, the annular sealing member 4 is provided with an impeller installation groove, and the impeller sealing ring 22 is at least partially arranged in the impeller installation groove, so that the fluid inlet diameter of the centrifugal pump is equal, and the flow resistance is reduced. The specific structure of the annular sealing element 4 can be designed appropriately according to actual needs, and the sealing requirements and the use requirements of convenient assembly can be met.
Preferably, clearance fit is formed between the pump casing 1 and the annular seal 4 and between the wear liner 3 and the annular seal 4 along the axial direction of the fluid inlet 12 to facilitate the disassembly and assembly of the annular seal 4. The range of the clearance fit can be appropriately selected according to actual needs, for example, the clearance is between 1mm and 2 mm.
Referring to fig. 1, in the illustrated preferred embodiment, an impeller 2 is driven by a drive shaft to rotate in a housing chamber 11 and pumps fluid flowing into the housing chamber from a fluid inlet 12, a wear liner 3 is fixedly mounted to a pump housing 1 by fixing bolts, and a pump cover 6 is provided on a side away from the fluid inlet 12 to facilitate assembly and maintenance of the impeller 2 and the wear liner 3 in the housing chamber 11.
According to another aspect of the present invention, there is provided a centrifugal pump provided with a sealing structure of the centrifugal pump according to the above. The centrifugal pump has the same advantages as the sealing structure of the centrifugal pump, and the description is omitted.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A seal structure of a centrifugal pump, characterized in that the seal structure comprises:
a pump housing (1), the pump housing (1) being formed with a housing chamber (11) and a fluid inlet (12);
an impeller (2), the impeller (2) being disposed within the containment chamber (11), the impeller (2) comprising an impeller body (21) and an impeller sealing ring (22), the impeller sealing ring (22) being arranged coaxially with the fluid inlet (12); and
an annular seal (4), the annular seal (4) being detachably mounted to the centrifugal pump, wherein a first seal portion (41) is formed between the annular seal (4) and a circumferential wall of the fluid inlet (12), and a second seal portion (42) is formed between the annular seal (4) and the impeller seal ring (22).
2. The seal structure of a centrifugal pump according to claim 1, wherein the annular seal member (4) is fitted over an outer periphery of the impeller seal ring (22), the circumferential wall of the fluid inlet (12) is fitted over an outer periphery of the annular seal member (4), the first seal portion (41) is a seal ring provided between the annular seal member (4) and the circumferential wall of the fluid inlet (12), and the second seal portion (42) is a gap seal structure formed between the annular seal member (4) and the impeller seal ring (22).
3. A seal structure of a centrifugal pump according to claim 2, wherein the gap seal structure includes a first gap seal portion and a second gap seal portion, wherein a plane on which the first gap seal portion is located and a plane on which the second gap seal portion is located have an angle therebetween.
4. A sealing structure of a centrifugal pump according to any one of claims 1 to 3, wherein the sealing structure comprises a wear liner (3) disposed in the accommodation chamber (11), the wear liner (3) is fixedly mounted to the pump housing (1), the wear liner (3) comprises a liner chamber (32) and a liner sealing ring (31) coaxially disposed with the fluid inlet (12), the impeller (2) is disposed in the liner chamber (32), and the liner sealing ring (31) is fitted around an outer periphery of the annular sealing member (4).
5. Sealing structure of a centrifugal pump according to claim 4, characterized in that a third sealing portion (43) is formed between the annular sealing member (4) and the packing plate sealing ring (31).
6. Sealing structure of a centrifugal pump according to claim 5, characterized in that the third sealing portion (43) is a sealing ring provided between the annular sealing member (4) and the packing plate sealing ring (31).
7. The seal structure of a centrifugal pump according to claim 4, wherein the outer periphery of the annular seal member (4) is formed with a mounting boss (44) corresponding to the wear-resistant liner plate (3), and a positioning pin (5) is provided between the mounting boss (44) and the liner plate seal ring (31).
8. Sealing structure of a centrifugal pump according to claim 4, characterized in that the diameter of the fluid inlet (12), the inner diameter of the annular seal (4) and the inner diameter of the impeller sealing ring (22) are equal, the fluid inlet (12) is formed with a seal mounting groove, the annular seal (4) is at least partially disposed in the seal mounting groove, the annular seal (4) is provided with an impeller mounting groove, and the impeller sealing ring (22) is at least partially disposed in the impeller mounting groove.
9. Sealing structure of a centrifugal pump according to claim 4, characterized in that clearance fits are formed between the pump casing (1) and the annular seal (4) and between the wear liner (3) and the annular seal (4) in the axial direction of the fluid inlet (12).
10. A centrifugal pump, characterized in that it is provided with a sealing structure of the centrifugal pump according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920959472.8U CN210343854U (en) | 2019-06-24 | 2019-06-24 | Sealing structure of centrifugal pump and centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920959472.8U CN210343854U (en) | 2019-06-24 | 2019-06-24 | Sealing structure of centrifugal pump and centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210343854U true CN210343854U (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920959472.8U Active CN210343854U (en) | 2019-06-24 | 2019-06-24 | Sealing structure of centrifugal pump and centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210343854U (en) |
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2019
- 2019-06-24 CN CN201920959472.8U patent/CN210343854U/en active Active
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