CN210531216U - Leakage-proof centrifugal pump - Google Patents
Leakage-proof centrifugal pump Download PDFInfo
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- CN210531216U CN210531216U CN201921542600.5U CN201921542600U CN210531216U CN 210531216 U CN210531216 U CN 210531216U CN 201921542600 U CN201921542600 U CN 201921542600U CN 210531216 U CN210531216 U CN 210531216U
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- pump
- impeller
- positioning section
- shaft
- mechanical seal
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Abstract
The utility model relates to an anti-leakage centrifugal pump, which comprises an impeller, a pump body, a pump cover, a pump shaft and a mechanical seal, wherein the pump cover is fixedly connected with the pump body; the pump shaft is also provided with a mechanical seal, the mechanical seal is encapsulated in the pump cover, a shaft sleeve of the mechanical seal is connected with a hub of the impeller, and a gland of the mechanical seal is fixed with the pump cover. The utility model prevents the medium from contacting the pump shaft; the embodiment reduces the requirement on the material of the pump shaft and saves the manufacturing and maintenance cost.
Description
Technical Field
The utility model relates to a centrifugal pump field especially relates to a prevent leakage type centrifugal pump.
Background
The application range of centrifugal pump is very wide, can use a lot of places, all will use the centrifugal pump when needing to carry out liquid transport, and the centrifugal pump passes through the rotation of impeller, lets liquid carry, has saved a large amount of time, has increased liquid transport efficiency, has avoided the consumption of human cost.
The pump shaft and the impeller of the traditional chemical centrifugal pump are generally in key transmission, and the impeller is fixed on the pump shaft by an impeller nut; the materials adopted by the chemical centrifugal pump generally have stronger corrosion resistance or stronger wear resistance, the commonly used pump shaft materials can not effectively resist the corrosion and the wear, and the pump shaft must adopt the materials with better corrosion resistance and wear resistance. The pump manufacturing costs and the maintenance costs for the user are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an increase the moment of torsion, improved the life of impeller, practiced thrift manufacturing and cost of maintenance's leakage-proof type centrifugal pump.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides an anti-leakage centrifugal pump, including impeller, pump body, pump cover, pump shaft and mechanical seal, the pump cover with pump body fixed connection, the one end of pump shaft is provided with the impeller and the impeller is located in the pump body, the pump shaft other end runs through the pump cover setting, the periphery of one end of pump shaft has the external screw thread, the wheel hub inner wall of impeller at least part have with the internal thread that the external screw thread matches, pump shaft screw thread fixes in the wheel hub of impeller; the pump is characterized in that a mechanical seal is further arranged on the pump shaft and encapsulated in the pump cover, a shaft sleeve of the mechanical seal is abutted to a wheel hub of the impeller, an O-shaped sealing ring is fixed between the wheel hub of the impeller and the shaft sleeve of the mechanical seal, and a gland of the mechanical seal is fixed to the pump cover.
Further, the pump shaft comprises a shaft body and a positioning section, the positioning section comprises a first positioning section and a second positioning section, and the diameter of the first positioning section is smaller than that of the second positioning section; the impeller is characterized in that a step blind hole matched with the positioning section is formed in the hub of the impeller, the internal thread is located on the inner wall of a small hole of the step blind hole, the external thread is located on the periphery of the first positioning section, the first positioning section is in threaded connection with the small hole, and one end, close to the first positioning section, of the second positioning section is connected with the inside of a large hole of the step blind hole in a clamped mode.
Furthermore, a sealing gasket is arranged between the pump body and the pump cover.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model discloses an anti-leakage centrifugal pump, the wheel hub of impeller has the internal thread, and one end of pump shaft has the external thread, screws the connection mode in the screw thread with similar bolt, connects the pump shaft screw thread in the wheel hub of impeller, has increased the transmission moment of torsion; the shaft sleeve of the mechanical seal is abutted against the hub of the impeller, and an O-shaped sealing ring is fixed between the hub of the impeller and the shaft sleeve of the mechanical seal, so that the mechanical seal is invalid, a medium can be prevented from leaking into the pump shaft from the joint of the hub and the mechanical seal, and the medium is prevented from contacting with the pump shaft; the embodiment reduces the requirement on the material of the pump shaft and saves the manufacturing and maintenance cost.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic view of a leakage-proof centrifugal pump according to an embodiment of the present invention;
fig. 2 is an exploded view of an impeller, a pump shaft and a mechanical seal of the leakage-proof centrifugal pump shown in fig. 1.
Wherein the reference numerals are as follows:
1. an impeller; 2. a pump body; 3. a pump cover; 4. a pump shaft; 5. mechanical sealing; 6. an O-shaped sealing ring; 7. a pump body sealing gasket; 8. a shaft sleeve; 9. a first positioning section; 10. a second positioning section; 11. a shaft body; 12. step blind holes.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the structure for avoiding contact between a pump shaft 4 and a medium includes an impeller 1, a pump body 2, a pump cover 3, a pump shaft 4 and a mechanical seal 5, wherein the pump cover 3 is fixedly connected with the pump body 2 through a bolt, one end of the pump shaft 4 is provided with the impeller 1, the impeller 1 is located in the pump body 2, the other end of the pump shaft 4 penetrates through the pump cover 3, the periphery of one end of the pump shaft 4 is provided with an external thread, at least a part of the inner wall of a hub of the impeller 1 is provided with an internal thread matched with the external thread, and the pump shaft 4 is fixed in the hub of the impeller 1 in; the pump shaft 4 is further provided with a mechanical seal 5, the mechanical seal 5 is packaged in the pump cover 3, a shaft sleeve 8 of the mechanical seal 5 is abutted to a hub of the impeller 1, and a gland of the mechanical seal 5 is fixed to the pump cover 3 through bolts.
From the exploded view of the impeller 1, the pump shaft 4 and the mechanical seal 5 shown in fig. 2, the pump shaft 4 includes a shaft body 11 and a positioning section arranged on the left side of the shaft body 11, the positioning section includes a first positioning section 9 and a second positioning section 10 arranged on the right side of the first positioning section 9, it can be seen from the figure that the first positioning section 9, the second positioning section 10 and the shaft body 11 are sequentially arranged from left to right, and the diameter of the first positioning section 9 is smaller than that of the second positioning section 10; the impeller 1's in-wheel form with location section assorted step blind hole 12 shape, the internal thread is located the aperture inner wall of step blind hole 12, the external screw thread is located the periphery of first location section 9, first location section 9 threaded connection be in the aperture, just second location section 10 is close to the one end joint of first location section 9 and is in the aperture of step blind hole 12.
An O-shaped sealing ring 6 is fixed between the hub of the impeller 1 and a shaft sleeve 8 of the mechanical seal 5, so that the medium is prevented from leaking from the joint of the hub and the mechanical seal 5 and further leaking into the pump shaft 4, and the medium is prevented from contacting with the pump shaft 4.
A sealing washer 7 is arranged between the pump body 2 and the pump cover 3, so that the pump body 2 and the pump cover 3 are connected more tightly, and the medium is prevented from leaking to the outside.
As shown in fig. 1, the pump body 2 has a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet form an L shape, that is, the liquid inlet is located on the left side of the impeller 1, and the liquid outlet is located on the upper end of the impeller 1.
The impeller 1 of the embodiment is internally provided with internal threads, one end of the pump shaft 4 is provided with external threads, and the pump shaft 4 is connected in the hub of the impeller 1 in a threaded manner in a manner similar to a connection mode that a bolt is screwed in the threads, so that the transmission torque is increased; meanwhile, a step is arranged in the hub of the impeller 1, the hub of the impeller 1 is in a step blind hole 12 shape, the first positioning section 9 is in threaded connection with the small hole, and one end, close to the first positioning section 9, of the second positioning section 10 is clamped in the large hole of the step blind hole 12, so that the connection concentricity of the pump shaft 4 and the impeller 1 is ensured; the mechanical seal 5 is arranged on the pump shaft 4, a shaft sleeve 8 of the mechanical seal 5 is abutted against a hub of the impeller 1, an O-shaped sealing ring 6 is fixed between the hub of the impeller 1 and the shaft sleeve 8 of the mechanical seal 5, and a gland of the mechanical seal 5 is fixed with the pump cover 3 through a bolt, so that even if the mechanical seal 5 fails, a medium can be prevented from leaking into the pump shaft 4 from the joint of the hub and the mechanical seal 5, and the medium is prevented from contacting with the pump shaft 4; the embodiment reduces the requirement on the material of the pump shaft 4 and saves the manufacturing and maintenance cost.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (3)
1. The utility model provides a prevent leakage type centrifugal pump, includes impeller, the pump body, pump cover, pump shaft and mechanical seal, the pump cover with pump body fixed connection, the one end of pump shaft is provided with the impeller just the impeller is located in the pump body, the pump shaft other end runs through the pump cover sets up its characterized in that: the periphery of one end of the pump shaft is provided with an external thread, at least part of the inner wall of the hub of the impeller is provided with an internal thread matched with the external thread, and the pump shaft is fixed in the hub of the impeller in a threaded manner; the pump shaft is further provided with a mechanical seal, the mechanical seal is packaged in the pump cover, a shaft sleeve of the mechanical seal is abutted to a wheel hub of the impeller, an O-shaped sealing ring is fixed between the wheel hub of the impeller and the shaft sleeve of the mechanical seal, and a gland of the mechanical seal is fixed to the pump cover.
2. The leakage-proof centrifugal pump according to claim 1, wherein: the pump shaft comprises a shaft body and a positioning section, the positioning section comprises a first positioning section and a second positioning section, and the diameter of the first positioning section is smaller than that of the second positioning section; the impeller is characterized in that a step blind hole shape matched with the positioning section is formed in the hub of the impeller, the internal thread is located on the inner wall of a small hole of the step blind hole, the external thread is located on the periphery of the first positioning section, the first positioning section is in threaded connection with the small hole, and one end, close to the first positioning section, of the second positioning section is connected with the inside of a large hole of the step blind hole in a clamped mode.
3. The leakage-proof centrifugal pump according to claim 1, wherein: and a sealing gasket is arranged between the pump body and the pump cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921542600.5U CN210531216U (en) | 2019-09-17 | 2019-09-17 | Leakage-proof centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921542600.5U CN210531216U (en) | 2019-09-17 | 2019-09-17 | Leakage-proof centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210531216U true CN210531216U (en) | 2020-05-15 |
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ID=70605482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921542600.5U Active CN210531216U (en) | 2019-09-17 | 2019-09-17 | Leakage-proof centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210531216U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027808A (en) * | 2021-05-13 | 2021-06-25 | 毅飞泵业（福州）有限公司 | Centrifugal pump |
-
2019
- 2019-09-17 CN CN201921542600.5U patent/CN210531216U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027808A (en) * | 2021-05-13 | 2021-06-25 | 毅飞泵业（福州）有限公司 | Centrifugal pump |
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