CN211449052U

CN211449052U - Vertical multi-stage centrifugal pump

Info

Publication number: CN211449052U
Application number: CN201921889127.8U
Authority: CN
Inventors: 朱智环; 叶策
Original assignee: Zhejiang Yineng Pump Co ltd
Current assignee: Zhejiang Yineng Pump Co ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-09-08
Anticipated expiration: 2029-11-01

Abstract

The utility model discloses a vertical multistage centrifugal pump, including the pump body and second screw hole, the top of the pump body is equipped with the back-off motor, the bottom of motor is equipped with the motor frame, the outer periphery parcel of motor has the motor waterproof protective housing, the bottom of shaft coupling is equipped with the main shaft that runs through the whole pump body, the below of primary shaft bearing is equipped with the filler axle sleeve, the below that the main shaft is located the filler axle sleeve is equipped with balanced hub, the below of balanced hub is equipped with a plurality of guide vane axle round the main shaft, the below from the top of pump body one side is equipped with the water end cover from the top down in proper order, exhaust end cover and water inlet end cover, be equipped with the secondary shaft bearing between the main shaft bottom and the pump body, one side that the water inlet end cover was located to pump body bottom is equipped with the bottom cap, one side that the water inlet end cover was kept away from to pump body bottom is equipped with, Vibration reduction and dynamic performance improvement of a shafting.

Description

Vertical multi-stage centrifugal pump

Technical Field

The utility model mainly relates to a pump body technical field, concretely relates to vertical multistage centrifugal pump.

Background

Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to rotate at a high speed, the water is thrown to the outer edge of the impeller to be thrown into a water pressure pipeline of the water pump through a flow channel of the volute-shaped pump shell.

The basic structure of the centrifugal pump is composed of six parts, namely an impeller, a pump body, a pump shaft, a bearing, a sealing ring and a stuffing box. The impeller is the core part of the centrifugal pump, the rotating speed of the impeller is higher than the output force, the blades on the impeller play a main role, and the impeller passes through a static balance experiment before assembly. The inner and outer surfaces on the impeller need to be smooth to reduce frictional losses from the water flow. The pump body is also called pump shell, and is the main body of the water pump. The supporting and fixing function is realized, and the supporting and fixing device is connected with a bracket for mounting the bearing. The pump shaft is connected with the motor through a coupling to transmit the torque of the motor to the impeller, so that the pump shaft is a main component for transmitting mechanical energy. The sliding bearing uses transparent oil as lubricant and is added to the oil level line. Too much oil needs to seep out along the pump shaft, too few bearings need to be burnt out due to overheating, and the temperature of the bearings is 85 ℃ at most in the running process of the water pump, and generally runs at about 60 ℃. The stuffing box mainly comprises stuffing, a water seal ring, a stuffing cylinder, a stuffing gland and a water seal pipe. The stuffing box mainly has the function of sealing a gap between the pump shell and the pump shaft, so that water in the pump is prevented from flowing to the outside and air outside is prevented from entering the pump. The vacuum in the water pump is always kept, when the pump shaft and the filler generate heat by friction, the water is held in the water seal ring by the water seal pipe to cool the filler, and the normal operation of the water pump is kept. The inspection of the stuffing box during the operational cycle inspection of the water pump is of particular interest, since the stuffing is to be replaced in about 600 hours of operation.

The centrifugal pump can be widely used for conveying slurry containing solid particles in the industries of electric power, metallurgy, coal, building materials and the like. Such as hydraulic ash removal in thermal power plants, ore pulp transportation in metallurgical dressing plants, coal slurry and dense medium transportation in coal washing plants, and the like. When the centrifugal pump works, the pump needs to be placed on the land, the water suction pipe is placed in water, and the pump needs to be filled and started. The mud pump and the submerged centrifugal pump are limited by the structure, the motor needs to be placed above the water surface during working, the pump is placed in water, and therefore the motor needs to be fixed, otherwise, the motor is scrapped when falling into the water. Moreover, since the length of the long shaft is generally fixed, the pump is troublesome to install and use, and the application occasions are limited.

The pipeline pump is used as a part of a pipeline, a submersible pump and a motor are manufactured into a whole without changing the pipeline during installation, the pump body of the submerged pump is immersed in liquid, a shield pump impeller and a motor rotor are connected into a whole, the pump body is arranged in the same sealing shell without adopting a sealing structure, the pump body is totally closed except an inlet and an outlet of a leakage-free pump magnetic pump, the pump and the motor are connected by adopting magnetic steel mutual attraction to drive a self-suction pump, the pump is started without filling a liquid high-speed pump, the rotating speed of a pump shaft is increased by a speed increasing box, the general rotating speed can reach more than 10000r/min, the inlet and the outlet connecting pipes of a partial flow pump or a tangential booster pump vertical cylinder type pump are also provided with an inner layer shell and an outer layer of shell on the same height of the upper. The ISG domestic water supply pump, the living pump, the community water pump and the living water supply and drainage equipment are designed according to the performance parameters of the IS and IR type centrifugal pumps and the unique structure combination of the vertical pump, are designed and manufactured strictly according to the ISO2858 requirements, are designed by adopting a domestic high-quality hydraulic model, and are the most ideal new-generation horizontal pump product. The product is uniformly sealed by hard alloy machinery. The application range is as follows: the ISW type pump is suitable for industrial and urban water supply and drainage, such as pressurization and water supply for high-rise buildings, garden sprinkling irrigation, fire fighting pressurization, remote transportation, heating, ventilation and refrigeration cycle, pressurization for bathrooms and the like, and is matched with equipment, and the use temperature is not more than 85 ℃. The ISWR type pump is widely applicable: the heat source water of the boilers in metallurgy, chemical engineering, textile, papermaking, guest restaurants and the like is pressurized, conveyed and used in an urban heating system, and the SGWR type service temperature is not more than 120 ℃.

Centrifugal pump structure among the prior art is complicated at present, and is also very poor to the water-proof effects of motor, uses not steady moreover, and the installation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a prevent that guide pulley from damaging fast and falling the line storage device of making an uproar for solve the technical problem who proposes in the above-mentioned background art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a vertical multistage centrifugal pump comprises a pump body and a second threaded hole, wherein a back-off motor is arranged at the top end of the pump body, a motor frame is arranged at the bottom of the motor, a waterproof motor protective shell is wrapped around the outer periphery of the motor, a shaft coupler is arranged at the output end of the motor, a main shaft penetrating through the whole pump body is arranged at the bottom of the shaft coupler, a first bearing seat is arranged between the center of the bottom of the motor frame and the main shaft, a packing shaft sleeve is arranged below the first bearing seat, a balance hub is arranged below the packing shaft sleeve, a plurality of guide vane shafts are arranged below the balance hub around the main shaft, each guide vane shaft is provided with a guide vane, a water end cover, an exhaust end cover and a water inlet end cover are sequentially arranged below one side of the pump body from top to bottom, a second bearing seat is arranged between the bottom of the main shaft and the pump body, and, one side of the bottom of the pump body, which is far away from the water inlet end cover, is provided with a mounting hole, and one side of the pump body, which is far away from the water inlet end cover, is provided with a water diversion device.

Furthermore, the water inlet end cover, the exhaust end cover and the water outlet end cover are all provided with plugs.

Furthermore, a mechanical seal is arranged on the first bearing seat.

Further, be equipped with first fixed orifices and second fixed orifices on the shaft coupling, be equipped with first screw hole on the main shaft of motor, the main shaft top is equipped with the second mounting hole, be equipped with first bolt between first screw hole and the first mounting hole, be equipped with the second bolt between second screw hole and the second mounting hole, it is fixed through first bolt and second bolt between the main shaft of shaft coupling and motor and the main shaft.

Furthermore, the water inlet end cover, the exhaust end cover and the water outlet end cover are communicated with the bottom of the pump body.

Further, the water diversion device is communicated with the bottom of the pump body.

Further, the main shaft is fixed through a first bearing seat and a second bearing seat.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up waterproof motor protective housing, can effectually carry out waterproofly to the motor, can make the pump body also can use under water, meanwhile, the shaft coupling of setting has buffering, damping and the effect that improves shafting dynamic behavior in the power transmission of high-speed heavy load.

The present invention will be explained in detail with reference to the drawings and specific embodiments.

Drawings

Fig. 1 is a front view of a vertical multistage centrifugal pump of the present invention;

fig. 2 is a schematic diagram of a shaft coupling of a vertical multistage centrifugal pump according to the present invention;

fig. 3 is a view of the plug of the vertical multistage centrifugal pump of the present invention.

In the figure 1, a pump body; 2. a waterproof protective shell of the motor; 3. a motor; 4. a coupling; 5. a motor frame; 6. a first bearing housing; 7. a balance hub; 8. a water end cap; 9. an exhaust end cap; 10. a water inlet end cover; 11. a lower end cover; 12. a second bearing housing; 13. mounting holes; 14. a guide vane; 15. A guide vane shaft; 16. a water diversion device; 17. a main shaft; 18. mechanical sealing; 19. a first threaded hole; 20. a second threaded hole; 21. a first bolt; 22. a first fixing hole; 23. a second fixing hole; 24. a second bolt; 25. a plug; 26. and a packing shaft sleeve.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully with reference to the accompanying drawings, in which several embodiments of the present invention are shown, but the present invention can be implemented in different forms, and is not limited to the embodiments described in the text, but rather, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

Referring to fig. 1-3, a vertical multistage centrifugal pump includes a pump body 1 and a second threaded hole 20, the top end of the pump body 1 is provided with an inverted motor 3, the bottom of the motor 3 is provided with a motor frame 5, the outer periphery of the motor 3 is wrapped with a motor waterproof protective shell 2, the output end of the motor 3 is provided with a coupling 4, the bottom of the coupling 4 is provided with a main shaft 17 penetrating through the whole pump body 1, a first bearing seat 6 is arranged between the center of the bottom of the motor frame 5 and the main shaft 17, a packing shaft sleeve 26 is arranged below the first bearing seat 6, a balance hub 7 is arranged below the packing shaft sleeve 26 of the main shaft 17, a plurality of guide vane shafts 15 are arranged below the balance hub 7 around the main shaft 17, each guide vane shaft 15 is provided with a guide vane 14, a water end cover 8, an exhaust end cover 9 and a water inlet end cover 10 are sequentially arranged below one side of the pump body 1 from, be equipped with second bearing frame 12 between main shaft 17 bottom and the pump body 1, one side that pump body 1 bottom is located into water end cover 10 is equipped with bottom end cover 11, one side that water end cover 10 was kept away from to pump body 1 bottom is equipped with mounting hole 13, one side that pump body 1 kept away from water end cover 8 is equipped with diversion device 16.

In order to further improve the use function of the vertical multistage centrifugal pump, the water inlet end cover 10, the exhaust end cover 9 and the water outlet end cover 8 are respectively provided with a plug 25.

In order to further improve the function of the vertical multistage centrifugal pump, the first bearing seat 6 is provided with a mechanical seal 18.

In order to further improve the service function of a vertical multistage centrifugal pump, be equipped with first fixed orifices 22 and second fixed orifices 23 on the shaft coupling 4, be equipped with first screw hole 19 on the main shaft of motor 3, main shaft 17 top is equipped with second mounting hole 13, be equipped with first bolt 21 between first screw hole 19 and the first mounting hole 13, be equipped with second bolt 24 between second screw hole 20 and the second mounting hole 13, it is fixed through first bolt 21 and second bolt 24 between the main shaft of shaft coupling 4 and motor 3 and main shaft 17.

In order to further improve the use function of the vertical multistage centrifugal pump, the water inlet end cover 10, the exhaust end cover 9 and the water outlet end cover 8 are communicated with the bottom of the pump body 1.

In order to further improve the use function of the vertical multistage centrifugal pump, the water diversion device 16 is communicated with the bottom of the pump body 1.

In order to further increase the functional use of a vertical multistage centrifugal pump, the main shaft 17 is fixed by the first bearing block 6 and the second bearing block 12.

The working principle is as follows: during the use, place the pump body 1 in the place of needs, starter motor 3, the motor drives the main shaft 17 rotatory, and main shaft 17 drives guide vane shaft 15 and rotates, pours water into from leading water device 16, can use, utility model discloses a set up the waterproof motor protective housing, can effectually carry out waterproofly to the motor, can make the pump body also can use under water, meanwhile, the shaft coupling of setting has buffering, damping and the effect that improves shafting dynamic behavior in the power transmission of high-speed heavy load.

The above description of the present invention is made in conjunction with the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and the method and the technical solution of the present invention are not substantially improved or directly applied to other occasions without improvement, and are all within the protection scope of the present invention.

Claims

1. A vertical multistage centrifugal pump, includes pump body (1) and second screw hole (20), its characterized in that: the top of the pump body (1) is equipped with back-off motor (3), the bottom of motor (3) is equipped with motor frame (5), the outer periphery parcel of motor (3) has motor waterproof protective housing (2), the output of motor (3) is equipped with shaft coupling (4), the bottom of shaft coupling (4) is equipped with main shaft (17) that run through whole pump body (1), be equipped with primary shaft bearing (6) between the bottom center department of motor frame (5) and main shaft (17), the below of primary shaft bearing (6) is equipped with packing axle sleeve (26), the below that main shaft (17) are located packing axle sleeve (26) is equipped with balanced hub (7), the below of balanced hub (7) is equipped with a plurality of and leads blade axle (15) round main shaft (17), every it all is equipped with stator (14) on blade axle (15), the below of pump body (1) one side from the top down is equipped with water end cover (8) in proper order, Exhaust end cover (9) and intake end cover (10), be equipped with second bearing seat (12) between main shaft (17) bottom and the pump body (1), one side that pump body (1) bottom is located intake end cover (10) is equipped with bottom end cover (11), one side that intake end cover (10) was kept away from to pump body (1) bottom is equipped with mounting hole (13), one side that the pump body (1) is kept away from water end cover (8) is equipped with diversion device (16).

2. A vertical multistage centrifugal pump according to claim 1, characterized in that: and the water inlet end cover (10), the exhaust end cover (9) and the water outlet end cover (8) are respectively provided with a plug (25).

3. A vertical multistage centrifugal pump according to claim 1, characterized in that: and a mechanical seal (18) is arranged on the first bearing seat (6).

4. A vertical multistage centrifugal pump according to claim 1, characterized in that: be equipped with first fixed orifices (22) and second fixed orifices (23) on shaft coupling (4), be equipped with first screw hole (19) on the main shaft of motor (3), main shaft (17) top is equipped with second mounting hole (13), be equipped with first bolt (21) between first screw hole (19) and first mounting hole (13), be equipped with second bolt (24) between second screw hole (20) and second mounting hole (13), it is fixed through first bolt (21) and second bolt (24) between main shaft and main shaft (17) of shaft coupling (4) and motor (3).

5. A vertical multistage centrifugal pump according to claim 1, characterized in that: the water inlet end cover (10), the exhaust end cover (9) and the water outlet end cover (8) are communicated with the bottom of the pump body (1).

6. A vertical multistage centrifugal pump according to claim 1, characterized in that: the water diversion device (16) is communicated with the bottom of the pump body (1).

7. A vertical multistage centrifugal pump according to claim 1, characterized in that: the main shaft (17) is fixed through a first bearing seat (6) and a second bearing seat (12).