CN214887734U - Rolling bearing-free multistage centrifugal pump - Google Patents
Rolling bearing-free multistage centrifugal pump Download PDFInfo
- Publication number
- CN214887734U CN214887734U CN202120964722.4U CN202120964722U CN214887734U CN 214887734 U CN214887734 U CN 214887734U CN 202120964722 U CN202120964722 U CN 202120964722U CN 214887734 U CN214887734 U CN 214887734U
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- pump
- pump shaft
- impeller
- supporting seat
- cavity
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Abstract
The utility model relates to a centrifugal pump especially relates to a no antifriction bearing formula multistage centrifugal pump. The utility model discloses a set up elementary impeller throttle cover, pump shaft supporting seat and pump shaft throttle cover, reduced pump shaft length, have throttle and support function simultaneously concurrently. The rolling bearing-free multistage centrifugal pump comprises a rotary support piece for connecting a pump body and a pump shaft, wherein the rotary support piece comprises a primary impeller throttling sleeve which is arranged between a first end of a pump cavity and a primary impeller and sleeved with the primary impeller; the accommodating cavity is communicated with the balance cavity and the second end of the pump cavity; the pump shaft supporting seat is fixed in the accommodating cavity and is in rotary connection with the pump shaft; and a pump shaft throttling sleeve sleeved and fixed with the pump shaft; one end of the pump shaft throttling sleeve is rotatably connected with the pump shaft supporting seat through a rotating part, and the other end of the pump shaft throttling sleeve is abutted to the impeller at the tail end of the secondary impeller set.
Description
Technical Field
The utility model relates to a centrifugal pump especially relates to a no antifriction bearing formula multistage centrifugal pump.
Background
The multistage centrifugal pump is characterized in that two or more than two impellers are arranged on a pump shaft, and the total lift of the pump is the sum of lifts generated by the impellers. The known multistage centrifugal pump has a serious problem of axial force because the impeller generates axial force when the impeller works, and the problem of the axial force is serious because the multistage centrifugal pump has more impellers.
Among the prior art, the rotation of pump shaft and the pump body is connected and set up sealedly through antifriction bearing more, and in the in-service use process, on the one hand because the roll axis bears the rotation influence and needs frequent lubrication and maintenance, and on the other hand because all need set up antifriction bearing at the pump shaft both ends to realize the rotation of pump shaft, further increased the axial length of pump shaft so as to be equivalent to, make pump shaft axial atress more serious, lead to the impeller axiality impaired.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing a no antifriction bearing formula multistage centrifugal pump, through setting up elementary impeller throttle cover, pump shaft supporting seat and pump shaft throttle cover, has reduced pump shaft length, has strengthened the rigidity support, has throttle and support function simultaneously concurrently.
The utility model discloses a no antifriction bearing formula multistage centrifugal pump, including the pump body, set up the pump shaft in the pump chamber along the pump body axial, be fixed in the water inlet end cover of pump chamber first end, be fixed in the play water section of pump chamber second end, connect the balance pipe of pump chamber first end and play water section to and set up in the play water section, and with the balance chamber of balance pipe intercommunication, the pump shaft is equipped with primary impeller and secondary impeller group from pump chamber first end to the play water section in proper order, still includes the rotation support piece of connecting the pump body and pump shaft, the rotation support piece is including setting up in between pump chamber first end and primary impeller, and with the primary impeller throttle cover of primary impeller suit; the accommodating cavity is communicated with the balance cavity and the second end of the pump cavity; the pump shaft supporting seat is fixed in the accommodating cavity and is in rotary connection with the pump shaft; and a pump shaft throttling sleeve sleeved and fixed with the pump shaft; one end of the pump shaft throttling sleeve is rotatably connected with the pump shaft supporting seat through a rotating part, and the other end of the pump shaft throttling sleeve is abutted to the impeller at the tail end of the secondary impeller set.
The primary impeller throttling sleeve, the pump shaft supporting seat and the pump shaft throttling sleeve can provide radial support for the pump shaft and have a throttling function, and the pump shaft throttling sleeve is abutted to the pump shaft supporting seat, so that the positioning bearing of the original multistage centrifugal pump can be replaced, the mechanical seal structure and the leakage point of the mechanical seal structure are reduced, and the production cost is reduced. When the centrifugal pump works, the axial acting force applied to the impeller acts on the pump shaft supporting seat through the pump shaft throttling sleeve, the self pressure is utilized to generate power for supporting, and the rigidity of the whole rotor structure is improved.
Preferably, the rotating part comprises a convex ring fixed at one end of the pump shaft supporting seat; the groove is arranged on the pump shaft throttling sleeve and is matched with the convex ring; the convex ring is rotatably connected with the groove.
Preferably, the pump shaft supporting seat is fixedly connected with the accommodating cavity through a key.
The utility model has the advantages that: the pump shaft length is reduced by arranging the primary impeller throttling sleeve, the pump shaft supporting seat and the pump shaft throttling sleeve, and the pump shaft throttling sleeve has the functions of throttling and supporting; the centrifugal pump has the advantages that the pump shaft throttling sleeve and the pump shaft supporting seat are arranged, the positioning bearing of the original multistage centrifugal pump can be replaced, the mechanical seal structure and the leakage point of the mechanical seal structure are reduced, the production cost is reduced, and the rigidity of the whole rotor structure is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment;
in the figure: 1. a pump body; 2. a pump chamber; 3. a pump shaft; 4. a water inlet end cover; 5. a water outlet section; 6. a balance tube; 7. a balancing chamber; 8. a primary impeller; 9. a secondary impeller set; 10. a primary impeller throttling sleeve; 11. an accommodating chamber; 12. a pump shaft supporting seat; 13. a pump shaft throttling sleeve; 14. a convex ring; 15. and (4) a groove.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the rolling bearing-free multistage centrifugal pump of the present invention comprises a pump body 1, a pump shaft 3 axially disposed in a pump cavity 2 along the pump body 1, a water inlet end cap 4 fixed to a first end of the pump cavity 2, a water outlet section 5 fixed to a second end of the pump cavity 2, a balance pipe 6 connecting the first end of the pump cavity 2 and the water outlet section 5, and a balance chamber 7 disposed in the water outlet section 5 and communicated with the balance pipe, wherein the pump shaft 3 is sequentially provided with a primary impeller 8 and a secondary impeller group 9 from the first end of the pump cavity 2 to the water outlet section 5, and further comprises a rotation support member connecting the pump body 1 and the pump shaft 3, the rotation support member comprises a primary impeller throttling sleeve 10 disposed between the first end of the pump cavity 2 and the primary impeller 8 and sleeved with the primary impeller 8; the accommodating cavity 11 is communicated with the balance cavity 7 and the second end of the pump cavity 2; a pump shaft supporting seat 12 fixed in the accommodating cavity 11 and rotationally connected with the pump shaft 3; and a pump shaft throttling sleeve 13 which is sleeved and fixed with the pump shaft 3; one end of the pump shaft throttling sleeve 13 is rotatably connected with the pump shaft supporting seat 12 through a rotating part, and the other end of the pump shaft throttling sleeve 13 is abutted to the impeller at the tail end of the secondary impeller set 9. The rotating part comprises a convex ring 14 fixed at one end of a pump shaft supporting seat 12; and a groove 15 which is arranged on the pump shaft throttling sleeve 13 and is matched with the convex ring 14; the male ring 14 is rotatably connected to the female groove 15. The pump shaft supporting seat 12 is fixedly connected with the accommodating cavity 11 through a key.
In this embodiment, the primary impeller throttle sleeve 10, the pump shaft support seat 12 and the pump shaft throttle sleeve 13 can provide radial support for the pump shaft 3, and have the throttling function, and the pump shaft throttle sleeve 13 abuts against the pump shaft support seat 12, so that the pump shaft throttle sleeve can replace a positioning bearing of an original multistage centrifugal pump, and meanwhile, a mechanical seal structure and a leakage point thereof are reduced, and the production cost is reduced. When the centrifugal pump works, the axial acting force applied to the impeller acts on the pump shaft supporting seat 12 through the pump shaft throttling sleeve 13, the self pressure can be utilized to generate power support, and the rigidity of the whole rotor structure is improved.
Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (3)
1. The utility model provides a no antifriction bearing formula multistage centrifugal pump, includes the pump body (1), along pump shaft (3) of pump chamber (2) of pump body (1) axial setting, be fixed in intake end cover (4) of pump chamber (2) first end, be fixed in play water section (5) of pump chamber (2) second end, connect balance pipe (6) of pump chamber (2) first end and play water section (5), and set up in play water section (5), and with balance chamber (7) of balance pipe intercommunication, pump shaft (3) are equipped with primary impeller (8) and secondary impeller group (9) by pump chamber (2) first end to play water section (5) in proper order, and its characterized in that still includes: a rotary support connecting the pump body (1) and the pump shaft (3), said rotary support comprising,
the primary impeller throttling sleeve (10) is arranged between the first end of the pump cavity (2) and the primary impeller (8) and is sleeved with the primary impeller (8);
the accommodating cavity (11) is communicated with the balance cavity (7) and the second end of the pump cavity (2);
a pump shaft supporting seat (12) fixed in the accommodating cavity (11) and rotationally connected with the pump shaft (3);
and a pump shaft throttling sleeve (13) which is sleeved and fixed with the pump shaft (3);
one end of the pump shaft throttling sleeve (13) is rotatably connected with the pump shaft supporting seat (12) through a rotating part, and the other end of the pump shaft throttling sleeve (13) is abutted to the impeller at the tail end of the secondary impeller set (9).
2. The rolling bearing-free multistage centrifugal pump according to claim 1, characterized in that: the rotating member includes a rotating member having a rotating shaft,
a convex ring (14) fixed at one end of the pump shaft supporting seat (12);
and a groove (15) which is arranged on the pump shaft throttling sleeve (13) and is matched with the convex ring (14);
the convex ring (14) is rotationally connected with the groove (15).
3. The rolling bearing-free multistage centrifugal pump according to claim 1, characterized in that: the pump shaft supporting seat (12) is fixedly connected with the accommodating cavity (11) through a key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120964722.4U CN214887734U (en) | 2021-05-07 | 2021-05-07 | Rolling bearing-free multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120964722.4U CN214887734U (en) | 2021-05-07 | 2021-05-07 | Rolling bearing-free multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214887734U true CN214887734U (en) | 2021-11-26 |
Family
ID=78946226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120964722.4U Active CN214887734U (en) | 2021-05-07 | 2021-05-07 | Rolling bearing-free multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214887734U (en) |
-
2021
- 2021-05-07 CN CN202120964722.4U patent/CN214887734U/en active Active
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