CN217002426U - Self-adaptive balance locking mechanism of multistage centrifugal pump - Google Patents
Self-adaptive balance locking mechanism of multistage centrifugal pump Download PDFInfo
- Publication number
- CN217002426U CN217002426U CN202220664195.XU CN202220664195U CN217002426U CN 217002426 U CN217002426 U CN 217002426U CN 202220664195 U CN202220664195 U CN 202220664195U CN 217002426 U CN217002426 U CN 217002426U
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- balance
- snap ring
- balance disc
- centrifugal pump
- balance pan
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Abstract
The utility model provides a balanced locking mechanism of multistage centrifugal pump self-adaptation, includes the snap ring, the side profile of snap ring is the step face, and is close to one side of balanced cover for the stub end, and the taut cover of balance pan is established to the snap ring overcoat, and the cooperation of the taut cover step face of snap ring and balance pan, the left side of the taut cover of balance pan is equipped with the balance pan, and the taut cover of balance pan passes through bolted connection with the balance pan, is equipped with the adjustment pad between snap ring and the balance pan, and the adjustment pad is located the inboard of the taut cover of balance pan. Compared with the prior art, the centrifugal pump has the technical effects that an expansion gap is reserved between the balance disc and the adjusting sleeve of the centrifugal pump, when the rotor is subjected to thermal expansion, the difference between the accumulated deformation of each part on the rotor and the expansion deformation of the pump shaft can be offset through the gap, and the balance disc can be ensured to be fixed at a proper position of the pump shaft.
Description
Technical Field
The utility model relates to the technical field of fluid machinery, in particular to a self-adaptive balance locking mechanism of a multistage centrifugal pump.
Background
The balance locking mechanism is used for fixing a balance disc part in the balance mechanism on the water supply pump rotor component. When the operation temperature of the water-feeding pump is high, the thermal expansion amount of the rotor is large, the expansion deformation amount of each part on the rotor is different from that of the pump shaft, the balance locking mechanism on the rotor of the traditional water-feeding pump is tightly connected with the adjacent part, and at the moment, stress concentration occurs due to the fact that the accumulated expansion deformation amount of each part on the shaft is inconsistent with the deformation amount of the pump shaft, and the rotor is bent and deformed.
At present, a balance locking mechanism at home and abroad is a balance disc and then a pair of locking nuts are added, the balance disc is tightly connected with adjacent parts on a rotor, and the balance disc and the adjacent parts are locked through the locking nuts.
SUMMERY OF THE UTILITY MODEL
The technical problems to be solved by the utility model are as follows: after a thermal expansion gap is reserved on the rotor, how to lock and fix the balance disc.
The technical scheme of the utility model is as follows:
the utility model provides a multistage centrifugal pump self-adaptation balanced locking mechanism, includes the snap ring, and the side profile of snap ring is the step face, and is close to one side of balanced cover for big head end, and the snap ring overcoat is established the taut cover of balance dish, and the snap ring cooperates with the taut cover step face of balance dish, and the left side of the taut cover of balance dish is equipped with the balance dish, and the taut cover of balance dish passes through screw connection with the balance dish, is equipped with the adjustment pad between snap ring and the balance dish, and the adjustment pad is located the inboard of the taut cover of balance dish.
The snap ring is a semicircular ring with two symmetrical halves.
The balance disc tensioning sleeve is connected with the balance disc through eight screws.
Compared with the prior art, the centrifugal pump has the technical effects that an expansion gap is reserved between the balance disc and the adjusting sleeve of the centrifugal pump, when the rotor is thermally expanded, the difference value between the accumulated deformation of each part on the rotor and the expansion deformation of the pump shaft can be offset through the gap, and the balance disc can be fixed on the pump shaft after the expansion gap is reserved by using the balance locking mechanism.
Drawings
Fig. 1 is a schematic view of a state of use of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.
As shown in fig. 1, the self-adaptive balance locking mechanism of the multistage centrifugal pump comprises a snap ring 7, the thickness of the snap ring 7 is adapted to the snap ring groove 11 of the shaft 1, the side profile of the snap ring 7 is a step surface (see reference numeral 71), one side (the side is called the left side below) close to the balance sleeve 3 is a big head end, a balance disc tensioning sleeve 5 is sleeved outside the snap ring 7, the snap ring 7 is matched with the step surface of the balance disc tensioning sleeve 5, a balance disc 4 is arranged on the left side of the balance disc tensioning sleeve 5, the balance disc tensioning sleeve 5 is connected with the balance disc 4 through eight screws 6, an adjusting pad 8 is arranged between the snap ring 7 and the balance disc 4, and the adjusting pad 8 is located on the inner side of the balance disc tensioning sleeve 5.
For the convenience of installation, the snap ring 7 is a semicircular ring with two symmetrical halves.
The working principle is as follows:
firstly, a balance sleeve 3 is fixedly connected to a feed water pump shell through screws, an adjusting sleeve 2 is sleeved outside a shaft 1, an expansion gap 21 is reserved between the adjusting sleeve 2 and a balance disc 4, the size of the expansion gap 21 is tmm, and gaps of different types of pumps are calculated respectively.
Secondly, snap ring 7 symmetry card is in axle 1 snap ring inslot, and the taut cover of balancing disk is in the snap ring 7 outside through axle 1 cover, guarantees that snap ring 7 fixes on axle 1.
Finally, when the running amount of the rotor is adjusted through the feed pump, the thickness of the adjusting pad 8 is calculated, namely the position of the balance disc 4 in the axial direction of the shaft 1 is determined (for example, if the balance disc 4 is moved rightwards a little, the theoretical value of the adjusting pad 8 is thickened a little), the adjusting pad 8 is processed to the calculated size, then the adjusting pad is installed behind the balance disc 4, the snap ring 7 and the balance disc tensioning sleeve 5 are installed, the connecting screw 6 between the balance disc tensioning sleeve 5 and the balance disc 4 is screwed, and the balance disc 4 and the balance disc tensioning sleeve 5 are fixed with the snap ring 7 at the moment, and the position of the snap ring 7 on the shaft is fixed.
At this time, for the whole of the balance disc tensioning sleeve 5 and the balance disc 4, the outer contour of the left end of the snap ring 7 is similar to a convex ring, and the convex ring is wedged between the balance disc tensioning sleeve 5 and the balance disc 4, so that the whole is relatively fixed with the position of the snap ring 7 in the axial direction of the shaft 1 and cannot move left and right, and the position of the snap ring 7 is fastened in the snap ring groove 11 of the shaft 1, and at this time, the balance disc 4, the balance disc tensioning sleeve 5, the snap ring 7 and the whole of the adjusting pad 8 are fixed on the shaft 1, and the rotation of a rotor part is not influenced.
The balance disc 4 is fixed on the rotor, when the rotor is thermally expanded, the accumulated deformation of each part on the rotor is different from the expansion deformation of the pump shaft, the reserved gap t is reduced after the deformation is offset, but not 0, and even if the expansion gap exists, the balance disc 4 can still be stably fixed at the determined position of the pump shaft 1 because the balance disc tensioning sleeve 5 is connected with the balance disc 4 through 8 screws.
An expansion gap is reserved between the centrifugal pump balance disc and the adjusting sleeve, when the rotor is in thermal expansion, the difference value of the accumulated deformation of each part on the rotor and the expansion deformation of the pump shaft can be partially offset by the gap, but the expansion gap still exists, if the balance disc is locked by the paired locking nuts, the balance disc is in an active state on the shaft due to the existence of the expansion gap.
See the prior art for additional details.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (3)
1. The utility model provides a balanced locking mechanism of multistage centrifugal pump self-adaptation, includes snap ring (7), its characterized in that: the profile of the side of the snap ring (7) is a step surface, one side close to the balance sleeve (3) is a big head end, a balance disc tensioning sleeve (5) is sleeved outside the snap ring (7), the snap ring (7) is matched with the step surface of the balance disc tensioning sleeve (5), a balance disc (4) is arranged on the left side of the balance disc tensioning sleeve (5), the balance disc tensioning sleeve (5) is connected with the balance disc (4) through a screw (6), an adjusting pad (8) is arranged between the snap ring (7) and the balance disc (4), and the adjusting pad (8) is located on the inner side of the balance disc tensioning sleeve (5).
2. The self-adaptive balancing and locking mechanism of a multistage centrifugal pump according to claim 1, characterized in that: the snap ring (7) is a semicircular ring with two symmetrical halves.
3. The self-adaptive balancing and locking mechanism of a multistage centrifugal pump according to claim 2, characterized in that: the balance disc tensioning sleeve (5) is connected with the balance disc (4) through eight screws (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220664195.XU CN217002426U (en) | 2022-03-25 | 2022-03-25 | Self-adaptive balance locking mechanism of multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220664195.XU CN217002426U (en) | 2022-03-25 | 2022-03-25 | Self-adaptive balance locking mechanism of multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217002426U true CN217002426U (en) | 2022-07-19 |
Family
ID=82373228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220664195.XU Active CN217002426U (en) | 2022-03-25 | 2022-03-25 | Self-adaptive balance locking mechanism of multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217002426U (en) |
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2022
- 2022-03-25 CN CN202220664195.XU patent/CN217002426U/en active Active
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