CN201627724U

CN201627724U - Vertical multi-stage centrifugal pump

Info

Publication number: CN201627724U
Application number: CN201020136188XU
Authority: CN
Inventors: 顾军
Original assignee: SHANGHAI LIANSHENG PUMP MANUFACTURING Co Ltd
Current assignee: SHANGHAI LIANSHENG PUMP MANUFACTURING Co Ltd
Priority date: 2010-03-19
Filing date: 2010-03-19
Publication date: 2010-11-10
Anticipated expiration: 2020-03-19

Abstract

The utility model relates to a vertical multi-stage centrifugal pump comprising a connecting seat arranged above a body, wherein a motor coupling is closely connected with a pump coupling on the connecting seat; the pump coupling is closely connected with a pump shaft; a mechanical seal with a sealing cover is arranged in a sealing cavity of a water outlet section and is fixed by a positioning groove at the upper end of the pump shaft; a final-stage impeller is connected at the upper end of the pump shaft in a water pumping chamber of the water outlet section; at least one impeller is arranged below the final-stage impeller which is spaced and positioned with the impeller through a first shaft sleeve; the impeller is arranged in a guide vane; the two impellers are spaced and positioned by a jacket and then spaced with a bearing bushing arranged on a bearing through a second shaft sleeve; the pump shaft is locked with the bearing through a check washer and a nut; a water inlet section with a water inlet is arranged at the bottom of the body; the water outlet section with a water outlet is arranged at the upper part; the water inlet section is spaced with the water outlet section through a middle section; one end of the connecting seat between a motor and a pump is connected with the water outlet section, and the other end thereof is connected with the motor; and the pump running is axially balanced.

Description

Vertical multi-stage centrifugal pump

Technical field

The utility model relates to a kind of vertical multi-stage centrifugal pump, relates in particular to the structure of this vertical multi-stage centrifugal pump.

Background technique

Multistage centrifugal pump all is to adopt Balance disc or balancing drum to come balancing axial thrust basically in the prior art, but starting frequently makes Balance disc or balancing drum wearing and tearing very fast because pump is in operation, and has the shortcomings such as shortening in working life, water pump operation poor reliability of pump.

Summary of the invention

The utility model technical issues that need to address have provided a kind of vertical multi-stage centrifugal pump, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises: the connection seat that is placed in the body top; Motor coupler closely is connected with the pump coupling on described connection seat; Described pump coupling closely is connected with pump shaft; The mechanical seal that has the machine capping is located in the water exit end Seal cage to be fixed by the locating slot of pump shaft upper end; In the water exit end pumping chamber, described pump shaft upper end connects an impeller; Under described impeller, also comprise an impeller at least; Described impeller is by first axle sleeve and impeller positioned at intervals; Impeller is located in the stator; Between two impellers by the chuck positioned at intervals, again by second axle sleeve and be arranged on the bearing bearing sleeve at interval; On pump shaft and bearing by floor clip and nut check; Have the inlet segment of water intake to be positioned at the bottommost of body, the water exit end that water outlet is arranged has middle spacer segment on top between inlet segment and the water exit end; Motor is connected water exit end with connection seat one end between the pump, and the other end is connected with motor.

Compared with prior art, the beneficial effects of the utility model are: reduce hydraulic loss, improve pump efficiency; Adopt rigid coupling to make the assurance that more is easy to get of drive end and pump rotor parts concentricity; Increased equalizing orifice and controlled axial force, made the pump operation longitudinal balance.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that water intake becomes 0 degree structural representation among Fig. 1 with water outlet;

Fig. 3 is that water intake becomes 90 degree structural representations among Fig. 1 with water outlet;

Fig. 4 is that water intake becomes 180 degree structural representations among Fig. 1 with water outlet;

Fig. 5 is that water intake becomes 270 degree structural representations among Fig. 1 with water outlet.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

By Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 as seen: the utility model comprises: the connection seat 1 that is placed in the body top; Motor coupler 2 closely is connected with pump coupling 3 on described connection seat 1; Described pump coupling 3 closely is connected with pump shaft 12; The mechanical seal 5 that has machine capping 4 is located in water exit end 6 Seal cages to be fixed by the locating slot of pump shaft 12 upper ends; In water exit end 6 pumping chambers, described pump shaft 12 upper ends connect an impeller 7; Also comprise an impeller 11 at least 7 times at described impeller; Described impeller 7 is by first axle sleeve 10 and impeller 11 positioned at intervals; Impeller is located in the stator 9; Between two impellers 11 by chuck 13 positioned at intervals, again by second axle sleeve 14 and be arranged on the bearing 15 bearing sleeve 16 at interval; On pump shaft 12 and bearing 15, lock by floor clip 17 and nut 18; Have the inlet segment 19 of water intake 20 to be positioned at the bottommost of body, the water exit end 6 that water outlet 21 is arranged has stage casing 8 at interval on top between inlet segment and the water exit end; Motor is connected water exit end 6 with connection seat 1 one ends between the pump, and the other end is connected with motor;

The diameter of described impeller 7 is greater than the diameter of impeller 11;

Described impeller 11 has the two sides seal ring and is provided with control balance of axial force hole with impeller 7 designs;

Described bearing 15 is directly installed on inlet segment 19 places with interference fit;

Described water intake 20 is 0 ° or 90 ° or 180 ° or 270 ° of setting angles with water outlet 21.

The utility model is compared with conventional apparatus has following advantage:

The utility model improves the tactic pattern of impeller, changes original single seal ring into double seal ring, and has increased equalizing orifice and control axial force, makes the pump operation longitudinal balance.

The utility model improves the tactic pattern of water pump, and it is bigger than normal that the impeller that original diameter is identical changes the impeller diameter into, is not directly installed in the water exit end pumping chamber by stator, reduces hydraulic loss, improves pump efficiency.

Driven end bearing of the present utility model is directly installed on the inlet segment with interference fit, adopts water lubrication, makes the bearing mounting or dismounting convenient.

The utility model adopts rigid coupling to make the assurance that more is easy to get of drive end and pump rotor parts concentricity.

The utility model is provided with rigid coupling at the pump drive end, and promptly motor coupler 2 closely is connected with pump coupling 3, and pump coupling 3 closely is connected with pump shaft 12, makes the assurance that more is easy to get of motor axis and pump rotor parts concentricity.Impeller 11, impeller 7, mechanical seal 5, bearing sleeve 16, first axle sleeve 10, second axle sleeve 14, chuck 13 are installed in respectively on the pump shaft 12, mechanical seal 5 is located in water exit end 6 Seal cages and is fixed by the locating slot on the pump shaft 12, impeller 7 is located in water exit end 6 pumping chambers, by first axle sleeve 10 and impeller 11 positioned at intervals, impeller is located in the stator 9; Whenever enhance between the one-level impeller 11 by chuck 13 positioned at intervals, have second axle sleeve 14 and bearing sleeve 16 at interval again, by floor clip 17, nut 18 locking rotor parts, the rotor that produces when preventing the water pump reversing is loosening.

Inlet segment 19 is positioned at bottommost water intake 20, water exit end 6 has water outlet 21 on top, stage casing 8 is arranged at interval between inlet segment and the water exit end, and be provided with the O RunddichtringO at the interval in case stopping leak leaks, the stator 9 of packing in the stage casing 8, motor is connected water exit end 6 with connection seat 1 one ends between the pump, and the other end is connected with motor, and is firm by turnbuckle.

For convenience the user pump house arrange and piping design on different demands, the utility model with the intake-outlet pipe be designed to that intake-outlet becomes that 0 ° of structure is shown in Figure 2, intake-outlet becomes that 90 ° of structures are shown in Figure 3, intake-outlet become 180 ° of structures shown in Figure 4, and intake-outlet become shown in 270 ° of structural drawing.

Working procedure of the present utility model and traditional multistage centrifugal pump there is no obvious difference, be that liquid is radially sucked from the pump water inlet mouth, enter impeller inlet from the inlet segment runner, be pressed into the stator pumping chamber by the impeller suction and after the impeller acting promotes energy, enhance energy by second level impeller, third level impeller again, water exit end pumping chamber harvest energy is arranged at last and send pump discharge.

The utility model is applicable to other liquid that is similar to water of carrying clear water or physicochemical properties, can be widely used in occasions such as factory, city water and urban architecture water.

Claims

1. a vertical multi-stage centrifugal pump comprises: the connection seat that is placed in the body top; It is characterized in that: motor coupler closely is connected with the pump coupling on described connection seat; Described pump coupling closely is connected with pump shaft; The mechanical seal that has the machine capping is located in the water exit end Seal cage to be fixed by the locating slot of pump shaft upper end; In the water exit end pumping chamber, described pump shaft upper end connects an impeller; Under described impeller, also comprise an impeller at least; Described impeller is by first axle sleeve and impeller positioned at intervals; Impeller is located in the stator; Between two impellers by the chuck positioned at intervals, again by second axle sleeve and be arranged on the bearing bearing sleeve at interval; On pump shaft and bearing by floor clip and nut check; Have the inlet segment of water intake to be positioned at the bottommost of body, the water exit end that water outlet is arranged has middle spacer segment on top between inlet segment and the water exit end; Motor is connected water exit end with connection seat one end between the pump, and the other end is connected with motor.

2. a kind of vertical multi-stage centrifugal pump according to claim 1 is characterized in that: the diameter of described impeller is greater than the diameter of impeller.

3. a kind of vertical multi-stage centrifugal pump according to claim 1 is characterized in that: described impeller and impeller design have the two sides seal ring and are provided with control balance of axial force hole.

4. a kind of vertical multi-stage centrifugal pump according to claim 1 is characterized in that: described bearing is directly installed on the inlet segment place with interference fit.

5. a kind of vertical multi-stage centrifugal pump according to claim 1 is characterized in that: described water intake and water outlet are 0 ° or 90 ° or 180 ° or 270 ° of setting angles.