CN2895819Y

CN2895819Y - Combined balancing apparatus for multi-stage pump

Info

Publication number: CN2895819Y
Application number: CNU2006200705658U
Authority: CN
Inventors: 钱万钧; 高稳戈; 李诗
Original assignee: 李冬庆
Priority date: 2006-03-17
Filing date: 2006-03-17
Publication date: 2007-05-02
Anticipated expiration: 2016-03-17

Abstract

The utility model discloses a combined balancing apparatus for multi-stage pump relating to a combined balancing apparatus for the axial force balance between the pump shaft of the horizontal multi-stage pump and housing. The pump shaft of the multi-stage pump(2)is connected with a motor output shaft by an elastic coupling component(1); a rolling bearing component(3)is respectively connected with an inhalation section(4) and a filler functional body(9)by bolts; the functional body(9)is connected with an exhalable section(8)by bolts; the inhalation section(4), a middle section(5)and an exhalable section(8)are connected together by tension bolts(1);an impeller(6)is arranged on the pump shaft(2)by the key; guide vanes(7)are arranged on the middle section(5)and the exhalable section(8)by pins; the combined balancing apparatus is arranged in the exhalable section(8)of the pump shaft(2)and hefiller functional body(9);a balancing drum(13), a balancing disc(12) and a mechanical seal(10)are arranged on the pump shaft(2)by pins; a balanced ring(14)is arranged on the exhalable section(8)by screws; the mechanical seal(10)is arranged in the filler functional body(9);both ends of the pump shaft(2)are supported on a short cylindrical roller bearing (15)and a double angular contact ball bearing(16);the axial clearance is provided between the balance disc(12)and the balanced ring(14). The combined balancing apparatus for multi-stage pump eliminates the axial jump of the pump rotor, and the clearance between the balance disc and balanced ring is the best clearance, which enhances the reliability and service life of the pump.

Description

Multistage pump associating Equilibrator

Technical field:

The utility model multistage pump relates to balance of axial force device between the pump shaft of horizontal type multi-stage pump and the body with the associating Equilibrator.

Background technique:

The multistage oil transfer pump that use in the oil field is the multistage segmented centrifugal pump of horizontal single suction, and pump stator mainly is made up of component such as suction casing, Spit Section, stage casing, stator, tail-hood and bearing suppories; Pump rotor is mainly formed by being installed in several impellers on the pump shaft, Balance disc balanced controls etc., and the bearing of supporting pump rotor is two single row roller bearings.

The mechanical seal of this series multistage pump, effect is still goodr at short notice, but mechanical seal subsequently just exposes problem successively, promptly use the life-span short, leaking just appears in continuous operation one wheat harvesting period that has, mean lifetime also just has only 3-4 month, does not reach normal projected life (8000-10000 hour).

After the pump mechanical sealing strip inspection of leaking, find that all rubber corrugated pipe and stationary ring rubber L pad suffer serious destruction, mainly show as the rubber swelling, tear, twist off and " phenomenon bites ", spring is turned round and is scratched etc., cause the rotating ring deflection, kill, bite, cause the axial free compensate function forfeiture of rotating ring, cause type of belt drive to lose efficacy.

In frequent replacing mechanical seal, brought infringement in various degree for main parts size such as pump shaft, bearing, cause the pump machine life to reduce.

Cause rubber corrugated pipe and L type rubber pad swelling, tear, twist off and " phenomenon bites ", the main cause that spring is turned round problems such as scratching is because the multistage pump rotor is constantly adjusted equilibrium position (starting for reaching the transient equiliblium axial force, particularly outstanding when adjusting operating mode), thereby make spring produce excessive pressing, the moment of torsion of spring transmission is too big, promptly moving, friction wasted work between the stationary ring attrition surface is too big, the frictional heat that produces makes Seal cage place temperature too high, quickened the chemical corrosion of medium to rubber parts, driving component (spring) is not enough to overcome this bigger moment of torsion and frictional force simultaneously, and pump starting, impact when stopping causes rubber parts, spring, bearing bites mutually; Go round and begin again, finally cause seal failure.Therefore, the multistage pump axial float is one of major reason that influences the mechanical seal life-span.

In sum, just need to improve the device of multi-stage pump axial force balance, and improve the block bearing of pump rotor parts.

Summary of the invention:

The purpose of this utility model provides a kind of multistage pump with the associating Equilibrator, adopts special Balance disc, balancing drum, gimbal and mechanical seal associating balance device structure, reduces the Balance disc radial dimension, is difficult for producing wearing and tearing; The Spit Section changes double-row angular contact bal bearing into, to bear the remaining axial force and the impact of starting and stopping pump.

A kind of multistage pump associating Equilibrator, the pump shaft of multistage pump (2) is connected with motor output shaft by elastic coupling flexible coupling parts (1), roller bearing component (3) respectively with suction casing (4), stuffing box body (9) is connected by double-screw bolt, stuffing box body (9) is connected by bolt with Spit Section (8), suction casing (4), be connected by turnbuckle (11) between stage casing (5) and Spit Section (8), impeller (6) is installed in pump shaft (2) by key, stator (7) is installed on stage casing (5) and Spit Section (8) by pin, it is characterized in that the associating Equilibrator is positioned at Spit Section of pump shaft (2) (8) and stuffing box body (9), balancing drum (13), Balance disc (12) and mechanical seal (10) are installed on the pump shaft (2) by key, gimbal (14) is installed on the Spit Section (8) by screw, and mechanical seal (10) is positioned at stuffing box body (9); Pump shaft (2) two ends are bearing in respectively on short cylindrical rolling bearing (15) and the double-row angular contact bal bearing (16).

As follows to the utility model multistage pump earlier now with the multistage centrifugal pump structure schematic illustration of associating Equilibrator:

Pump shaft is connected with motor output shaft by the elastic coupling flexible coupling parts, the roller bearing component at multistage centrifugal pump two ends respectively with suction casing, the stuffing box body is connected by double-screw bolt, the stuffing box body is connected by bolt with the Spit Section; Be connected by turnbuckle between suction casing, stage casing and the Spit Section; Some impellers are installed on the pump shaft by key respectively, and some stators are installed on stage casing and the Spit Section by dowel fixes respectively.

This multistage pump is made up of balancing drum, gimbal, Balance disc and mechanical seal with the associating Equilibrator.This multistage pump is positioned at Spit Section and stuffing box body with the associating Equilibrator, balancing drum in the associating Equilibrator, Balance disc and mechanical seal are installed by key and are connected on the pump shaft, gimbal is fixed on the Spit Section by screw, and mechanical seal is positioned at the stuffing box body.Gapped A between Balance disc and the gimbal, gap A are best clearance.

The pump shaft that this multistage pump is installed with the associating Equilibrator, two ends are bearing in respectively on short cylindrical rolling bearing and the double-row angular contact bal bearing.

This multistage pump is as follows with the advantage of associating Equilibrator:

1, because axially throwing of pump rotor eliminated in the change of bearing configuration, therefore, the position of Balance disc is also with regard to relative fixed, and promptly the axial clearance of Balance disc is definite value.

2, the variable quantity minimum of the axial clearance A between Balance disc and the gimbal, promptly Balance disc axial clearance is best clearance.

3, because the setting of this Equilibrator, when the axial force of water pump changes, rotor axial displacement minimum, thereby the reliability and the working life of having improved water pump.

4, the double-row angular contact bal bearing rating life is long.

Description of drawings:

Fig. 1: multistage centrifugal pump structural representation.

Fig. 2: the mutual alignment of associating Equilibrator on the pump shaft (2) and impeller (6), Spit Section (8), stuffing box body (9) concerns schematic representation.

Fig. 3: the bearing configuration schematic diagram that pump shaft (2) two ends of associating Equilibrator are installed.

Embodiment:

Referring to Fig. 1: among Fig. 1: (1) is the elastic coupling flexible coupling parts, and (2) are pump shaft, and (3) are roller bearing component, (4) be suction casing, (5) are the stage casing, and (6) are impeller, (7) be stator, (8) be the Spit Section, (9) are the stuffing box body, and (10) are mechanical seal, (11) be turnbuckle, (12) be Balance disc, (13) are balancing drum, and (14) are gimbal.

Pump shaft (2) is connected with motor output shaft by elastic coupling flexible coupling parts (1), elastic coupling flexible coupling parts (1) are connected on the pump shaft (2) by key, the roller bearing component at multistage centrifugal pump two ends (3) is connected by double-screw bolt with suction casing (4), stuffing box body (9) respectively, and stuffing box body (9) is connected by bolt with Spit Section (8); Be connected by turnbuckle (11) between suction casing (4), stage casing (5) and Spit Section (8); Some impellers (6) are installed on the pump shaft (2) by key respectively, and the stator (7) identical with impeller (6) quantity is installed on stage casing (5) and Spit Section (8) by dowel fixes respectively; This multistage pump is positioned at the Spit Section (8) and the stuffing box body (9) of pump shaft (2) with the associating Equilibrator.

Part is the suction pipe of connecting tube shown in left upper end double dot dash line among Fig. 1, horizontal two dot and dash line in Fig. 1 middle and upper part are the axle seal water pipe, axle seal water pipe left end is connected to the mechanical seal chamber of suction casing (4), right-hand member is connected to the mechanical seal chamber of stuffing box body (9), and left and right mechanical seal (10) is indoor in left and right mechanical seal respectively.The effect of axle seal water pipe is lubricated, cools off water supply to mechanical seal (10).

Fig. 1 middle and lower part two dot and dash line are balance tube, and the effect of balance tube is the axial force between balance impeller (6) entrance point and the associating Equilibrator.The balance tube left end is connected suction casing (4) import, and the balance tube right-hand member is connected on the associating Equilibrator behind the Spit Section (8).

Referring to Fig. 2: among Fig. 2: (6) are impeller, and (8) are the Spit Section, and (9) are the stuffing box body, (10) be mechanical seal, (12) are Balance disc, and (13) are balancing drum, (14) be gimbal, A is illustrated between Balance disc (12) and the gimbal (14) among Fig. 2 axial clearance.

This multistage pump is made up of balancing drum (13), gimbal (14), Balance disc (12) and mechanical seal (10) with the associating Equilibrator.Balancing drum in the associating Equilibrator (13), Balance disc (12) and mechanical seal (10) are installed by key and are connected on the pump shaft (2), and gimbal (14) is fixed on the Spit Section (8) by screw, and mechanical seal (10) is positioned at stuffing box body (9).

Axial clearance A between Balance disc (12) and the gimbal (14) is a best clearance.

Referring to Fig. 3: among Fig. 3: (2) are pump shaft, and (6) are the identical impellers of several structures, and (15) are the short cylindrical rolling bearing, and (16) are double-row angular contact bal bearing.

The pump shaft (2) that this multistage pump is installed with the associating Equilibrator is bearing in respectively on short cylindrical rolling bearing (15) and the double-row angular contact bal bearing (16) at its two ends.

Claims

1, a kind of multistage pump associating Equilibrator, the pump shaft of multistage pump (2) is connected with motor output shaft by elastic coupling flexible coupling parts (1), roller bearing component (3) respectively with suction casing (4), stuffing box body (9) is connected by double-screw bolt, stuffing box body (9) is connected by bolt with Spit Section (8), suction casing (4), be connected by turnbuckle (11) between stage casing (5) and Spit Section (8), impeller (6) is installed in pump shaft (2) by key, stator (7) is installed on stage casing (5) and Spit Section (8) by pin, it is characterized in that the associating Equilibrator is positioned at Spit Section of pump shaft (2) (8) and stuffing box body (9), balancing drum (13), Balance disc (12) and mechanical seal (10) are installed on the pump shaft (2) by key, gimbal (14) is installed on the Spit Section (8) by screw, and mechanical seal (10) is positioned at stuffing box body (9); Pump shaft (2) two ends are bearing in respectively on short cylindrical rolling bearing (15) and the double-row angular contact bal bearing (16).

2, a kind of multistage pump according to claim 1 is characterized in that between Balance disc (12) and the gimbal (14) axial clearance A being arranged with the associating Equilibrator.