CN213116880U

CN213116880U - Improved generation CFB boiler multistage feed pump balancing unit

Info

Publication number: CN213116880U
Application number: CN202022037236.6U
Authority: CN
Inventors: 朱元芳
Original assignee: Jiangsu Kaifeng Pump Valve Co ltd
Current assignee: Jiangsu Kaifeng Pump Valve Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-05-04
Anticipated expiration: 2030-09-17

Abstract

The utility model relates to a feed pump technical field just discloses a multistage feed pump balancing unit of improved generation CFB boiler, including the pump body and center pin, the center pin sets up the inside at the pump body, the inner wall of the pump body is provided with the balancing ring, the surface of center pin is provided with balanced cover. This multistage feed pump balancing unit of improved generation CFB boiler, one side of compensating ring is fixed with the compensating ring arch, and one side of compensating ring is fixed with the compensating disc arch, and the compensating ring is protruding all to adopt wear-resisting steel to make with the compensating disc arch, and the feed pump operation in-process, the compensating ring is protruding to rub the operation with the compensating disc arch, damages the back at balancing unit and can reach the repairing action through the compensating ring is protruding with the compensating disc arch, has reduced the replacement cost.

Description

Improved generation CFB boiler multistage feed pump balancing unit

Technical Field

The utility model relates to a feed pump technical field specifically is a multistage feed pump balancing unit of improved generation CFB boiler.

Background

The existing water pump comprises various types such as centrifugation, axial flow, mixing, self-suction, pressurization, diving type and the like, and generally comprises a pump body, an impeller and a motor; when the pump works, the motor drives the impeller to rotate at a high speed, liquid in the pump body rotates along with the impeller, the liquid is thrown out by the impeller under the action of centrifugal force, and a vacuum low-pressure area is formed in the center of the impeller, so that the liquid is continuously sucked into the pump body and then is discharged through the outlet of the water pump. The balance disc is one of key parts for balancing axial stress of the water pump in the starting and running processes, wherein the balance disc and the balance ring form a pair of mutually-frictional components, and the axial thrust borne by the impeller is offset by generating an axial thrust directed to the outlet side on the balance disc; the method specifically comprises the following steps: when the axial force generated by the impeller is greater than the axial force on the balance disc, the pump moves in the axial direction of the pump inlet to reduce the gap between the balance disc and the balance ring, so that the resistance of high-pressure fluid passing through the gap is increased, the leakage rate is reduced, the pressure between the balance disc and the balance ring is increased, and the balance force on the balance disc is increased until the balance force is equal to the axial force; and conversely, when the axial force is smaller than the balance force, the axial outlet side of the pump moves, the gap between the balance disc and the balance ring is increased, the leakage amount of the high-pressure fluid is increased, the pressure between the balance disc and the balance ring is reduced, and the balance force acting on the balance disc is reduced until the axial force is equal to the axial force generated on the impeller.

The existing balance disc and balance ring are easy to wear due to friction when in use, the service life is short, the water pump can be normally used only by frequent maintenance, the damage belongs to the aspect of wear, the balance disc and the balance ring are integrated with each other, the repair is basically impossible, the wear is serious, and only the replacement is needed, so the use cost is increased.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides an improved generation CFB boiler multistage feed pump balancing unit has solved the easy wearing and tearing of current balance disk and the balance ring that proposes in the above-mentioned background art and can not carry out the problem of repairing.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model provides an improved generation CFB boiler multistage feed pump balancing unit, includes the pump body and central shaft, the central shaft sets up the inside at the pump body, the inner wall of the pump body is provided with the balancing ring, the surface of central shaft is provided with the balance sleeve.

Furthermore, a balance ring protrusion is fixed on one side of the balance ring, and the cross section of the balance ring is L-shaped.

Furthermore, a balance disc is fixed on the outer surface of the balance sleeve, and a balance disc bulge is fixed on one side of the balance disc.

Furthermore, the balance ring bulge and the balance disc bulge are both made of wear-resistant steel.

Further, the balance ring is fixed on the inner wall of the pump body, the balance ring and the balance disc are concentric with the central shaft, and the balance ring bulge is matched with the balance disc bulge.

Further, the inner surface of the balance sleeve is matched with the outer surface of the central shaft, and a gap is reserved between the inner surface of the balance ring and the outer surface of the balance sleeve.

Further, the balance ring, the balance sleeve and the balance disc are all annular.

(III) advantageous effects

The utility model provides an improved generation CFB boiler multistage feed pump balancing unit possesses following beneficial effect:

this multistage feed pump balancing unit of improved generation CFB boiler, one side of compensating ring is fixed with the compensating ring arch, and one side of compensating ring is fixed with the compensating disc arch, and the compensating ring is protruding all to adopt wear-resisting steel to make with the compensating disc arch, and the feed pump operation in-process, the compensating ring is protruding to rub the operation with the compensating disc arch, damages the back at balancing unit and can reach the repairing action through the compensating ring is protruding with the compensating disc arch, has reduced the replacement cost.

Drawings

FIG. 1 is a schematic structural diagram of an improved CFB boiler multi-stage feed pump balancing device of the present invention;

FIG. 2 is a schematic structural diagram of a balancing ring of the multi-stage feed pump balancing device of the CFB boiler of the present invention;

fig. 3 is a schematic structural diagram of a balance disc of the multi-stage feed pump balancing device of the improved CFB boiler of the present invention.

In the figure: the pump body 1, center pin 2, compensating ring 3, compensating ring arch 301, balance cover 4, balance disk 5, balance disk arch 501.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the present invention provides a technical solution:

an improved CFB boiler multistage feed pump balancing device comprises a pump body 1 and a central shaft 2, wherein the central shaft 2 is arranged inside the pump body 1, the inner wall of the pump body 1 is provided with a balance ring 3, one side of the balance ring 3 is fixedly provided with a balance ring bulge 301, the balance ring bulge 301 and a balance disc bulge 501 are both made of wear-resistant steel, the cross section of the balance ring 3 is L-shaped, the balance ring 3 is fixed on the inner wall of the pump body 1, the balance ring 3 and the balance disc 5 are concentric with the central shaft 2, the balance ring bulge 301 is matched with the balance disc bulge 501, the outer surface of the central shaft 2 is provided with a balance sleeve 4, the outer surface of the balance sleeve 4 is fixedly provided with a balance disc 5, one side of the balance disc 5 is fixedly provided with the balance disc bulge 501, the inner surface of the balance sleeve 4 is matched with the outer surface of the central shaft 2, and a gap is reserved; the balance ring 3, the balance sleeve 4 and the balance disc 5 are all annular; the balance ring bulge 301 and the balance disc bulge 501 perform friction operation, and after the balance device is damaged, the balance ring bulge 301 and the balance disc bulge 501 can achieve a repairing effect, so that the replacement cost is reduced.

The theory of operation, this improved generation CFB boiler multistage feed pump balancing unit, when the balancing unit wearing and tearing were changed, opened pump body 1, took out balancing ring 3 and balance sleeve 4, and the use tool takes off the protruding 301 of balancing ring and the protruding 501 of balancing disk after wearing and tearing, and it can to change the protruding 301 of balancing ring and the protruding 501 of balancing disk of new.

It should be noted that, in the present invention, unless explicitly fixed or limited otherwise, the terms "set", "install", "connect", and "fix" should be understood in a broad sense, for example, they may be fixedly connected or detachably connected; or indirectly through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an improved generation CFB boiler multistage feed pump balancing unit, includes pump body (1) and central axle (2), its characterized in that: the central shaft (2) is arranged inside the pump body (1), the inner wall of the pump body (1) is provided with a balance ring (3), and the outer surface of the central shaft (2) is provided with a balance sleeve (4);

a balance ring bulge (301) is fixed on one side of the balance ring (3), and the cross section of the balance ring (3) is L-shaped;

the outer surface of the balance sleeve (4) is fixed with a balance disc (5), and one side of the balance disc (5) is fixed with a balance disc bulge (501).

2. An improved CFB boiler multi-stage feedwater pump balancing device of claim 1, wherein: the balance ring bulge (301) and the balance disc bulge (501) are both made of wear-resistant steel.

3. An improved CFB boiler multi-stage feedwater pump balancing device of claim 1, wherein: the inner wall at the pump body (1) is fixed in stabilizer ring (3), stabilizer ring (3) and balance dish (5) all with center pin (2) concentric circles, stabilizer ring arch (301) and balance dish arch (501) looks adaptation.

4. An improved CFB boiler multi-stage feedwater pump balancing device of claim 1, wherein: the inner surface of the balance sleeve (4) is matched with the outer surface of the central shaft (2), and a gap is reserved between the inner surface of the balance ring (3) and the outer surface of the balance sleeve (4).

5. An improved CFB boiler multi-stage feedwater pump balancing device of claim 1, wherein: the balance ring (3), the balance sleeve (4) and the balance disc (5) are all annular.