CN215521287U

CN215521287U - Multi-stage pump with novel structure

Info

Publication number: CN215521287U
Application number: CN202120208183.1U
Authority: CN
Inventors: 王海波; 李光勇
Original assignee: GUANGDONG LINGXIAO PUMP INDUSTRY CO LTD
Current assignee: GUANGDONG LINGXIAO PUMP INDUSTRY CO LTD
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2022-01-14
Anticipated expiration: 2031-01-25

Abstract

The utility model discloses a novel-structure multistage pump which comprises a base, a pump shell, an outer barrel, a middle section, a pump shaft and a motor, wherein the pump shell is arranged on the base; a water outlet channel is arranged between the inner wall of the outer barrel and the outer wall of the middle section and is communicated with a water outlet section arranged above the middle section at the top end; the middle section comprises a bottom bracket, an outer bracket and an inner bracket, a plurality of groups of space guide vanes are arranged between the inner bracket and the outer bracket, the space guide vanes, the inner bracket and the outer bracket define a flow guide channel, and a supporting seat is arranged on the inner side of the top end of the inner bracket; the pump shaft is provided with a plurality of impellers which are uniformly distributed; one side of the pump shell is provided with a water inlet which is communicated with the impeller at the bottom end, the impeller is communicated with the adjacent diversion channel, and the other side of the pump shell is provided with a water outlet. The vertical centrifugal pump unit solves the problems of strong vibration and large noise of the existing vertical centrifugal pump unit, prolongs the service life of the unit, avoids water accumulation due to the arrangement of the middle section, and has simple structure and manufacturing process and low cost.

Description

Multi-stage pump with novel structure

Technical Field

The utility model relates to the technical field of multistage pumps, in particular to a multistage pump with a novel structure.

Background

At present, most of pumps for working conditions of ships and warships commonly used in the market adopt vertical multistage centrifugal pumps due to the limitation of installation space and the performance requirement of high lift. The centrifugal pump unit with the traditional structure is made of a common three-phase asynchronous motor, and the coupler is made of a powder metallurgy process. However, the vertical multistage centrifugal pump has multiple stages and high gravity center, and the positions of the pump, the equipment device or the base body are arranged and connected on the base of the pump. When a centrifugal pump or an equipment unit is strongly impacted, the vibration noise generated by the pump is too large due to the unbalance of a rotor of the centrifugal pump, insufficient rigidity of a support, defects of a coupler, friction of a moving part and a static part, high gravity center of the centrifugal pump and the like, so that the safety and the stability of the operation of the unit can be directly influenced, and the service life of the unit is influenced. And the existing middle section lower bracket and the upper bracket are connected into a whole through welding or integral casting, a liquid storage chamber can be formed, after the water pump is normally used, water is accumulated in the liquid storage chamber, the sanitary requirement is not met, the structure is complex, the manufacturing process is complex, the cost is high, and the consumed materials are more. In view of the above, it is desirable to design a multistage pump with a new structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multistage pump with a new structure, which solves the problems of strong vibration and large noise of the existing vertical centrifugal pump unit, prolongs the service life of the unit, avoids water accumulation due to the arrangement of the middle section, and has the advantages of simple structure and manufacturing process and low cost.

In order to achieve the aim, the utility model provides a multistage pump with a new structure, which comprises a base, a pump shell arranged on the base, an outer cylinder arranged on the pump shell, a middle section arranged in the outer cylinder, a pump shaft arranged at the center of the middle section and a motor for driving the pump shaft to be connected;

a water outlet channel is arranged between the inner wall of the outer barrel and the outer wall of the middle section, and the water outlet channel is communicated with a water outlet section arranged above the middle section at the top end;

the middle section comprises a bottom bracket, an outer bracket arranged above the bottom bracket and an inner bracket arranged in the outer bracket, a plurality of groups of space guide vanes are arranged between the inner bracket and the outer bracket, the space guide vanes, the inner bracket and the outer bracket define a flow guide channel, a supporting seat is arranged on the inner side of the top end of the inner bracket, and a central hole penetrating through the pump shaft is formed in the center of the supporting seat;

the pump shaft is provided with a plurality of impellers which are uniformly distributed, and the impellers are arranged inside the bottom bracket;

and a water inlet is formed in one side of the pump shell and communicated with the impeller at the bottom end, the impeller is communicated with the adjacent flow guide channel, a water outlet is formed in the other side of the pump shell, and the water outlet is communicated with the water outlet channel.

Preferably, an end cover is arranged at the upper end of the pump shell, and a sealing ring is arranged at the joint of the end cover and the outer cylinder.

Preferably, a pump cover is arranged above the water outlet section, two ends of the pump cover are fixed on the outer barrel, and an elastic adjusting pad is arranged at the joint of the pump cover and the water outlet section.

Preferably, a motor seat is arranged above the pump cover, a fixing bolt is arranged on one side of the motor seat, and the bottom end of the fixing bolt is fixed on the end cover.

Preferably, the connection part of the pump shaft, the pump cover and the motor seat is provided with a mechanical seal, and the pump shaft is connected with the motor through a clamping shell coupling.

Preferably, one side of the pump cover is provided with a release valve.

Preferably, a sliding bearing is arranged at the joint of the supporting seat and the pump shaft, a bearing sleeve is arranged on the outer side of the sliding bearing, and the outer wall of the bearing sleeve is connected with the supporting seat.

Preferably, an opening conical expansion sleeve is arranged at the joint of the impeller and the pump shaft.

Preferably, one side of the middle section is provided with a pull rod, the top end of the pull rod is fixed on the pump cover, and the bottom end of the pull rod is fixed on the end cover.

Therefore, the novel-structure multistage pump adopting the structure solves the problems of strong vibration and large noise of the existing vertical centrifugal pump unit, prolongs the service life of the unit, avoids water accumulation due to the arrangement of the middle section, and has simple structure and manufacturing process and lower cost.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic diagram of a multi-stage pump of a new configuration according to an embodiment of the present invention;

FIG. 2 is a mid-section axial cross-sectional view of an embodiment of a new configuration multi-stage pump of the present invention.

Detailed Description

The technical solution of the present invention is further illustrated by the accompanying drawings and examples.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Examples

Fig. 1 is a schematic structural diagram of an embodiment of a new-structure multistage pump of the present invention, and fig. 2 is a sectional view of a middle-section shaft of an embodiment of a new-structure multistage pump of the present invention, and as shown in the drawings, the present invention provides a new-structure multistage pump, which includes a base 1, a pump case 2 disposed on the base 1, an outer cylinder 3 disposed on the pump case 2, a middle section 4 disposed inside the outer cylinder 3, a pump shaft 5 disposed at the center of the middle section 4, and a motor 6 connected to the drive pump shaft 5; a water outlet channel 7 is arranged between the inner wall of the outer barrel 3 and the outer wall of the middle section 4, and the water outlet channel 7 is communicated with a water outlet section 8 arranged above the middle section 4 at the top end; the middle section 4 comprises a bottom bracket 41, an outer bracket 42 arranged above the bottom bracket 41 and an inner bracket 43 arranged inside the outer bracket 42, a plurality of groups of space guide vanes 44 are arranged between the inner bracket 43 and the outer bracket 42, the space guide vanes 44, the inner bracket 43 and the outer bracket 42 define a flow guide channel 45, a support seat 46 is arranged on the inner side of the top end of the inner bracket 43, and a central hole 47 penetrating through the pump shaft 5 is arranged in the center of the support seat 46; the pump shaft 5 is provided with a plurality of impellers 9 which are uniformly distributed, and the impellers 9 are arranged inside the bottom bracket 41; one side of the pump shell 2 is provided with a water inlet 10, the water inlet 10 is communicated with an impeller 9 at the bottom end, the impeller 9 is communicated with an adjacent diversion channel 45, the other side of the pump shell 2 is provided with a water outlet 11, and the water outlet 11 is communicated with a water outlet channel 7. The reinforcing ribs with the triangle-like structures are arranged on the outer wall of the upper end of the outer support, so that the strength of the middle section can be increased, in addition, the liquid storage chamber is not arranged outside the flow guide channel, the water accumulation is avoided, the structure is simpler, the manufacturing process is simple, the material consumption is less, and the cost is greatly reduced. When the vertical centrifugal pump unit is used, water enters from the water inlet, sequentially passes through the impeller, the flow guide channel, the impeller and the flow guide channel, is analogized in sequence, then passes through the water outlet section, flows through the water outlet channel and flows out of the water outlet, the problems of strong vibration and large noise of the existing vertical centrifugal pump unit are solved by the structure, and the service life of the unit is prolonged.

An end cover 12 is arranged at the upper end of the pump shell 2, and a sealing ring 13 is arranged at the joint of the end cover 12 and the outer cylinder 3, so that the connection sealing performance is improved.

A pump cover 14 is arranged above the water outlet section 8, two ends of the pump cover 14 are fixed on the outer cylinder 3, and an elastic adjusting pad 15 is arranged at the joint of the pump cover 14 and the water outlet section 8. A motor base 16 is arranged above the pump cover 14, a fixing bolt 17 is arranged on one side of the motor base 16, and the bottom end of the fixing bolt 17 is fixed on the end cover 12.

The connection part of the pump shaft 5, the pump cover 14 and the motor base 16 is provided with a mechanical seal 18, and the pump shaft 5 is connected with the motor 6 through a clamping shell coupling 19. One side of the pump cover 14 is provided with a deflation valve 20, so that deflation can be performed at any time, and the influence of overlarge internal pressure on the use of the multistage pump is avoided.

The supporting seat 46 is provided with a sliding bearing 21 at the joint with the pump shaft 5, a bearing sleeve 22 is arranged outside the sliding bearing 21, and the outer wall of the bearing sleeve 22 is connected with the supporting seat 46. An opening conical expansion sleeve 23 is arranged at the joint of the impeller 9 and the pump shaft 5.

One side of middle section 4 is provided with pull rod 24, and the top of pull rod 24 is fixed on pump cover 14, and the bottom is fixed on end cover 12.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the utility model without departing from the spirit and scope of the utility model.

Claims

1. A new construction multistage pump characterized in that:

the pump comprises a base, a pump shell arranged on the base, an outer barrel arranged on the pump shell, a middle section arranged in the outer barrel, a pump shaft arranged at the center of the middle section and a motor for driving the pump shaft to be connected;

2. A new construction multi-stage pump according to claim 1, wherein: an end cover is arranged at the upper end of the pump shell, and a sealing ring is arranged at the joint of the end cover and the outer barrel.

3. A new construction multi-stage pump according to claim 2, wherein: a pump cover is arranged above the water outlet section, two ends of the pump cover are fixed on the outer barrel, and an elastic adjusting pad is arranged at the joint of the pump cover and the water outlet section.

4. A new construction multi-stage pump according to claim 3, wherein: a motor seat is arranged above the pump cover, a fixing bolt is arranged on one side of the motor seat, and the bottom end of the fixing bolt is fixed on the end cover.

5. A new construction multistage pump according to claim 4, characterized in that: and the pump shaft is connected with the motor through a clamping shell coupling.

6. A new construction multi-stage pump according to claim 5, wherein: and one side of the pump cover is provided with a release valve.

7. A new construction multi-stage pump according to claim 6, wherein: the supporting seat with the pump shaft junction is provided with slide bearing, slide bearing's the outside is provided with the bearing housing, the outer wall of bearing housing with the supporting seat is connected.

8. A new construction multi-stage pump according to claim 7 wherein: and an opening conical expansion sleeve is arranged at the joint of the impeller and the pump shaft.

9. A new construction multi-stage pump according to claim 8, wherein: and a pull rod is arranged on one side of the middle section, the top end of the pull rod is fixed on the pump cover, and the bottom end of the pull rod is fixed on the end cover.