CN202158020U

CN202158020U - Multi-stage pump combined balance device

Info

Publication number: CN202158020U
Application number: CN201120260125XU
Authority: CN
Inventors: 钱万钧; 李浩洲; 徐节; 朱立祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2012-03-07
Anticipated expiration: 2021-07-22

Abstract

A multi-stage pump combined balance device relates to balance devices of axial force between a pump shaft and a machine body. A tail cover (11) is connected with a water outlet section (5), a last-stage guide vane (7) is arranged on the water outlet section (5), an impeller (9) is arranged on the pump shaft (4), and a thread wave balance drum (1) and a balance disc (3) are arranged on the pump shaft (4) through a key (6). A balance ring (2) is arranged on the water outlet section (5), and a gap is reserved between the balance ring (2) and the thread wave balance drum (1). A mechanical sealing shaft sleeve (15) is sleeved on the pump shaft (4), and a mechanical sealing (13) is sleeved on the mechanical sealing shaft sleeve (15). A mechanical sealing pressing cover (10) arranged on the tail cover (11) is connected onto the outer end of the mechanical sealing (13). A gap is reserved between the thread wave balance drum (1) and the water outlet section (5), and a gap A is reserved between the balance ring (2) and the balance disc (3). The multi-stage pump combined balance device is in the best balance state, thereby prolonging service life of a pump.

Description

Multistage pump associating Equilibrator

Technical field

The utility model multistage pump associating Equilibrator relates to balance of axial force device between pump shaft and the body of multistage pump.

Background technique

The pump stator of multistage centrifugal pump mainly is made up of component such as suction casing, water exit end, stage casing, stator, tail-hood and bearing suppories, and pump rotor is mainly formed by being installed in a plurality of impellers on the pump shaft, Balance disc etc., and pump shaft is supported by two bearings.

Because multistage pump will produce spontaneous axial force in the running, this spontaneous axial force is prone to make mechanical seal to damage, and during frequent change mechanical seal, also can damage component such as pump shaft, bearing, and the machine life of pump is descended.

Therefore, need on pump, install the associating Equilibrator additional,, come the described spontaneous axial force of balance, thereby prolong the working life of pump so that produce an opposite axial force.

Summary of the invention

The purpose of the utility model provides multistage pump associating Equilibrator, adopts screw thread ripple balancing drum, gimbal, Balance disc and mechanical seal to constitute the associating Equilibrator, the purpose of the axial force that is produced when reaching the ballast pump running.

Multistage pump associating Equilibrator; Be connected through link between tail-hood and the water exit end, the final stage stator is installed on the water exit end through the stator screw, and impeller is installed on the pump shaft through impeller key; On the pump shaft in water exit end; Screw thread ripple balancing drum and Balance disc are installed on the pump shaft through key, and gimbal is installed on the water exit end through the gimbal attachment screw, and be gapped between the multiple thread ripple of gimbal inner ring wall and screw thread popin Heng Guwaiquanbi; Mechanical seal sleeve is sleeved on the pump shaft, and the mechanical seal that is positioned at the mechanical seal chamber is sleeved on mechanical seal axle and puts; The mechanical seal cover that is connected on the tail-hood through connecting bolt is connected the mechanical seal outer end; Between the multiple thread ripple of screw thread popin Heng Guwaiquanbi and water exit end inwall axial clearance is arranged, gapped A between gimbal and Balance disc; The pump shaft two ends are installed in the bearing of bearing support.

The design principle of the utility model multistage pump associating Equilibrator is explained as follows:

Multistage pump produces one to the left the spontaneous axial force of water exit end to the impeller direction when operation; This diminishes the spontaneous left side axial force of multistage pump for balance; Through on multistage pump, being designed with the associating Equilibrator; So that when pump operation, can produce a longitudinal balance power to the right through this associating Equilibrator, so that the above-mentioned left side of balance axial force.

Owing on pump shaft, screw thread ripple balancing drum is housed through key; And through the gimbal attachment screw the gapped gimbal that is enclosed within on the screw thread ripple balancing drum is being installed on the water exit end; And on pump shaft, Balance disc is installed through key; Final stage stator on being installed in water exit end and be installed in and just form the zone of high pressure in the pump chamber between the impeller on the pump shaft; Just form low pressure area in the pump chamber between water exit end, tail-hood and Balance disc; Between multiple thread ripple and the water exit end of medium fluid through screw thread ripple balancing drum outer surface axially the gap and and gimbal between the axial clearance that forms, also have formed best clearance between gimbal and Balance disc, between said pump chamber zone of high pressure and low pressure area, just produced a longitudinal balance power to the right; Just can balance each other with said left side axial force, prevent that with regard to reaching pump shaft when operation from producing play and damaging the optimum balance purpose of multistage pump.

The structure of the utility model multistage pump associating Equilibrator further specifies as follows:

Because tail-hood is installed on the water exit end; And mechanical seal cover is installed on the tail-hood through connecting bolt; Mechanical seal cover axially is being connected the mechanical seal outer end again, thus make mechanical seal can not produce axial motion, make mechanical seal the inner all the time with the flange crimping mutually of mechanical seal sleeve.

The utility model multistage pump associating Equilibrator advantage is: through screw thread ripple balancing drum, gimbal and the Balance disc of installing; Pressure difference between final stage stator and Balance disc is more obvious; And because best clearance A is arranged between gimbal and Balance disc; Then make the longitudinal balance power of whole multistage pump associating Equilibrator be tending towards the optimum balance state, thereby prolonged the working life of pump.

Description of drawings

Fig. 1: be multistage pump associating Equilibrator cross-sectional schematic.

Fig. 2: be screw thread ripple balancing drum 1 cross-sectional schematic.

Fig. 3: for looking schematic representation in screw thread ripple balancing drum 1 left side.

Fig. 4: be screw thread ripple balancing drum 1 schematic three dimensional views.

Embodiment

Referring to Fig. 1, be connected through link between the multistage pump associating Equilibrator, tail-hood 11 and water exit end 5; Final stage stator 7 is installed on the water exit end 5 through stator screw 8; Impeller 9 is installed on the pump shaft 4 through impeller key, and on the pump shaft 4 in water exit end 5, screw thread ripple balancing drum 1 is installed on the pump shaft 4 through key 6 with Balance disc 3; Gimbal 2 is installed on the water exit end 5 through gimbal attachment screw 14, and 16 in the multiple thread ripple of gimbal 2 inner ring walls and screw thread ripple balancing drum 1 collar wall is gapped; Mechanical seal sleeve 15 is sleeved on the pump shaft 4, and the mechanical seal 13 that is positioned at mechanical seal chamber 19 is sleeved on the mechanical seal sleeve 15; The mechanical seal cover 10 that is connected on the tail-hood 11 through connecting bolt 12 is connected mechanical seal 13 outer ends; Between the multiple thread ripple 16 of screw thread ripple balancing drum 1 collar wall and water exit end 5 inwalls axial clearance is arranged, 3 gapped A of gimbal 2 and Balance disc; Pump shaft 4 two ends are installed in the bearing of bearing support.

Referring to Fig. 2, Fig. 3 and Fig. 4; On screw thread ripple balancing drum 1 collar wall of round casing, multiple thread ripple 16 is arranged; The inner ring hole of screw thread ripple balancing drum 1 is circular pump shaft mounting hole 17, on the inner ring wall of screw thread ripple balancing drum 1, has keyway 18, and keyway 18 supplies fitting key 6 usefulness.

Claims

1. multistage pump is united Equilibrator; Be connected through link between tail-hood (11) and the water exit end (5); Final stage stator (7) is installed on the water exit end (5) through stator screw (8); Impeller (9) is installed on the pump shaft (4) through impeller key, it is characterized in that on the pump shaft (4) in water exit end (5), screw thread ripple balancing drum (1) and Balance disc (3) are installed on the pump shaft (4) through key (6); Gimbal (2) is installed on the water exit end (5) through gimbal attachment screw (14), and is gapped between the multiple thread ripple (16) of gimbal (2) inner ring wall and screw thread ripple balancing drum (1) collar wall; Mechanical seal sleeve (15) is sleeved on the pump shaft (4), and the mechanical seal (13) that is positioned at mechanical seal chamber (19) is sleeved on the mechanical seal sleeve (15); The mechanical seal cover (10) that is connected on the tail-hood (11) through connecting bolt (12) is connected mechanical seal (13) outer end; Between the multiple thread ripple (16) of screw thread ripple balancing drum (1) collar wall and water exit end (5) inwall axial clearance is arranged, gapped A between gimbal (2) and Balance disc (3); Pump shaft (4) two ends are installed in the bearing of bearing support.

2. multistage pump associating Equilibrator according to claim 1; It is characterized in that on screw thread ripple balancing drum (1) collar wall of round casing, multiple thread ripple (16) being arranged; The inner ring hole of screw thread ripple balancing drum (1) is circular pump shaft mounting hole (17); On the inner ring wall of screw thread ripple balancing drum (1), have keyway (18), use for fitting key (6).