CN215486610U

CN215486610U - Horizontal split axial split ten-stage centrifugal pump

Info

Publication number: CN215486610U
Application number: CN202023305273.7U
Authority: CN
Inventors: 姜伟; 陈海娇
Original assignee: Shenyang Fonda Pumps Co ltd
Current assignee: Shenyang Fonda Pumps Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-01-11
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a horizontal split axial split ten-stage centrifugal pump which comprises a pump body, a pump cover, an impeller and a bearing component, wherein the pump cover is fixedly connected with the pump body through a fastening bolt; a driving end bearing part and a driving end mechanical seal are arranged on one side of the driving end of the pump shaft, and a non-driving end bearing part and a non-driving end mechanical seal are arranged on one side of the non-driving end of the pump shaft; the impeller includes suction side impeller and spits the side impeller, and suction side impeller and spit the side impeller and equally divide five respectively, are provided with between every impeller and the pump shaft and divide half snap ring, and every impeller is equallyd divide and is positioned the pump shaft alone through dividing half snap ring respectively. Each impeller is independently positioned through the half clamping ring, so that the axial positioning accuracy is achieved, and the error is reduced; five impellers of the suction side impeller and five impellers of the discharge side impeller are symmetrically arranged back to back, so that the axial force can be balanced, and the balance system is simple in structure.

Description

Horizontal split axial split ten-stage centrifugal pump

Technical Field

The utility model belongs to the technical field of industrial pumps, and particularly relates to a horizontal split axial split ten-stage centrifugal pump.

Background

The multistage centrifugal pump is characterized by that the liquid is fed into the pump from the suction inlet of impeller, the prime mover can be used for driving impeller to rotate by means of pump shaft to apply work to the liquid so as to increase its energy, and the medium can be used for transferring the mechanical energy of prime mover to the liquid by means of action of rotating impeller to the liquid. Because the speed energy and the pressure energy of the acting liquid are increased in the process of flowing from the inlet to the outlet of the impeller, the liquid discharged by the impeller passes through the extrusion chamber, most of the speed energy is converted into the pressure energy, and then the pressure energy is conveyed out along the discharge pipeline, at the moment, the vacuum or low pressure is formed at the inlet of the impeller due to the discharge of the liquid, the liquid in the liquid pool at the suction inlet is pressed into the inlet of the impeller under the action of the liquid level pressure (atmospheric pressure), and then the rotating impeller continuously sucks and discharges the liquid; wherein the medium is a liquid. The multistage centrifugal pump is composed of a plurality of impellers, and can meet requirements when high output pressure is needed. At present, some existing multistage centrifugal pumps have the following disadvantages: the use and maintenance are inconvenient, and parts in the pump are inconvenient to overhaul, so that the overhaul time is long, and the operation cost is high; the impeller arrangement mode of the existing multistage centrifugal pump has the disadvantages that the axial force of a rotor is large, a complex balancing mechanism is needed to balance the axial force, the safety and the reliability of the operation of the pump are reduced, and the axial positioning of the impeller of the existing multistage centrifugal pump is not accurate enough.

Disclosure of Invention

Aiming at the problems, the utility model makes up the defects of the prior art and provides a horizontal split axial split ten-stage centrifugal pump.

In order to achieve the purpose, the utility model adopts the following technical scheme.

The utility model relates to a horizontal split axial split ten-stage centrifugal pump which comprises a pump body, a pump cover, an impeller and a bearing component, wherein the pump cover is fixedly connected with the pump body through a fastening bolt; the method is characterized in that: a driving end bearing part and a driving end mechanical seal are arranged on one side of the driving end of the pump shaft, and a non-driving end bearing part and a non-driving end mechanical seal are arranged on one side of the non-driving end of the pump shaft; the impeller comprises an intake-side impeller and a discharge-side impeller, the number of the intake-side impeller and the number of the discharge-side impeller are five respectively, a half-dividing snap ring is arranged between each impeller and the pump shaft, and each impeller is independently positioned on the pump shaft through the half-dividing snap ring; an impeller sealing ring and a shell sealing ring are arranged between each impeller and the pump body, and the shell sealing ring is arranged on the outer side of the impeller sealing ring; a drive end throat bush is arranged between the pump shaft positioned on the drive end side of the suction side impeller and the pump body, a pressure relief shaft sleeve and a non-drive end throat bush are arranged between the pump shaft positioned on the non-drive end side of the discharge side impeller and the pump body, and a pressure relief bush is arranged between the outer side of the pressure relief shaft sleeve and the pump body; a suction inlet and a discharge outlet are arranged below the pump body, and a balance pipe is also arranged below the pump body;

the suction side impeller comprises a first-stage impeller, a second-stage impeller, a third-stage impeller, a fourth-stage impeller and a fifth-stage impeller which are sequentially arranged behind a throat lining of the driving end, and impeller suction ports of the first-stage impeller, the second-stage impeller, the third-stage impeller, the fourth-stage impeller and the fifth-stage impeller face the driving end of the pump shaft; the impeller at the spitting side comprises a sixth-stage impeller, a seventh-stage impeller, an eighth-stage impeller, a ninth-stage impeller and a tenth-stage impeller which are sequentially arranged from the non-driving end of the pump shaft to the shaft center side, and impeller suction ports of the sixth-stage impeller, the seventh-stage impeller, the eighth-stage impeller, the ninth-stage impeller and the tenth-stage impeller face the non-driving end of the pump shaft.

As a preferable scheme of the utility model, the pump body and the pump cover adopt a horizontal split structure and are axially split.

In another preferred embodiment of the present invention, an intermediate bushing is disposed between the suction-side impeller and the discharge-side impeller, the intermediate bushing is connected to the pump shaft through an intermediate bushing, and the suction-side impeller and the discharge-side impeller are symmetrically disposed on the pump shaft on both sides of the intermediate bushing.

As another preferable mode of the present invention, the first-stage impeller, the second-stage impeller, the third-stage impeller, the fourth-stage impeller, the fifth-stage impeller, the sixth-stage impeller, the seventh-stage impeller, the eighth-stage impeller, the ninth-stage impeller, and the tenth-stage impeller are provided with hub sealing rings, an interstage bush is provided between the outer side of the hub sealing ring on the first-stage impeller, the second-stage impeller, the third-stage impeller, the fourth-stage impeller, the sixth-stage impeller, the seventh-stage impeller, the eighth-stage impeller, and the ninth-stage impeller and the pump body, and an intermediate bush is provided between the outer side of the hub sealing ring on the fifth-stage impeller and the hub sealing ring on the tenth-stage impeller and the pump body.

The utility model has the beneficial effects.

1. According to the horizontal split axial split ten-stage centrifugal pump provided by the utility model, the pump body and the pump cover are in a horizontal split structure and are split axially, so that the convenience of use and maintenance is ensured, and all parts and sealing can be checked by disassembling the pump cover; the suction inlet and the discharge outlet are positioned below the pump, the whole pump rotor can be taken down without disassembling a pipeline, liquid is completely discharged, all surfaces can be cleaned, the maintenance time is saved, and the operation cost is reduced.

2. Each impeller is independently positioned through the half clamping ring, so that the axial positioning accuracy is achieved, and the error is reduced; the five impellers on the suction side and the five impellers on the discharge side are symmetrically arranged back to back, and the arrangement mode can self balance the axial force, so that the balance system has a simple structure, a complex balance mechanism is not required to be configured, and the pump runs more safely and reliably when a medium containing a solid shell is conveyed.

Drawings

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

FIG. 1 is an overall structure diagram of a horizontal split axial split ten-stage centrifugal pump according to the present invention.

FIG. 2 is a side view structural diagram of a horizontal split axial split ten-stage centrifugal pump of the utility model.

The labels in the figure are: 1 is a pump body; 2 is a pump cover; 3 is a shell sealing ring; 4 is an interstage bushing; 5 is a middle lining; 6 is a pressure relief lining; 7 is a drive end throat bush; 8 is a non-drive end throat bushing; 9 is a driving end mechanical seal; 10 is a drive end bearing component; 11 is a non-drive end bearing component; 12 is a pump shaft; 13 is a suction side impeller; 14 is a discharge-side impeller; 15 is an impeller sealing ring; 16 is a hub sealing ring; 17 is a middle shaft sleeve; 18 is a pressure relief shaft sleeve; 19 is a halved snap ring; 20 is a balance tube; 21 is a non-drive end mechanical seal.

Detailed Description

Referring to the attached drawing 1, the horizontal split axial split ten-stage centrifugal pump comprises a pump body 1, a pump cover 2, a pump shaft 12, an impeller and a bearing component, wherein the pump cover 2 is fixedly connected with the pump body 1 through a fastening bolt, the pump shaft 12 penetrates through the pump body 1, and the impeller is arranged on the pump shaft 12; a driving end bearing part 10 and a driving end mechanical seal 9 are arranged on one side of the driving end of the pump shaft 12, and a non-driving end bearing part 11 and a non-driving end mechanical seal 21 are arranged on one side of the non-driving end of the pump shaft 12; the impeller comprises an intake-side impeller 13 and a discharge-side impeller 14, the number of the intake-side impeller 13 and the number of the discharge-side impeller 14 are five respectively, a semi-dividing snap ring 19 is arranged between each impeller and the pump shaft 12, and each impeller is independently positioned on the pump shaft 12 through the semi-dividing snap ring 19; each impeller is independently positioned through the half-divided clamping ring 19, so that the axial positioning accuracy is achieved, and the error is reduced.

An impeller sealing ring 15 and a shell sealing ring 3 are arranged between each impeller and the pump body 1, and the shell sealing ring 3 is arranged on the outer side of the impeller sealing ring 15; a drive-end throat bushing 7 is arranged between the pump shaft 12 positioned on the drive end side of the suction-side impeller 13 and the pump body 1, a pressure relief shaft sleeve 18 and a non-drive-end throat bushing 8 are arranged between the pump shaft 12 positioned on the non-drive end side of the discharge-side impeller 14 and the pump body 1, and a pressure relief bushing 6 is arranged between the outer side of the pressure relief shaft sleeve 18 and the pump body 1; the pressure relief bushing 6 can reduce the pressure to the minimum and then returns to the suction inlet through the balance pipe 20, so that the non-driving mechanical seal 21 does not need to bear high pressure and can bear the pressure of the suction inlet as the driving-end mechanical seal 9; the suction inlet and the discharge outlet are arranged below the pump body 1, the whole pump rotor can be taken down without disassembling a pipeline, liquid is completely discharged, all surfaces can be cleaned, the maintenance time is saved, and the operation cost is reduced; a balance pipe 20 is arranged below the pump body 1.

The pump body 1 and the pump cover 2 are of a horizontal split structure and are axially split, the convenience of use and maintenance of the oil transfer pump is guaranteed, and all parts and sealing can be checked by disassembling the pump cover.

An intermediate bushing 5 is arranged between the suction-side impeller 13 and the discharge-side impeller 14, the intermediate bushing 5 is connected with the pump shaft 12 through an intermediate shaft sleeve 17, and the suction-side impeller 13 and the discharge-side impeller 14 are symmetrically arranged on the pump shaft 12 on two sides of the intermediate bushing 5.

The suction side impeller 13 comprises a first-stage impeller, a second-stage impeller, a third-stage impeller, a fourth-stage impeller and a fifth-stage impeller which are sequentially arranged behind the throat lining 7 of the driving end, and impeller suction ports of the first-stage impeller, the second-stage impeller, the third-stage impeller, the fourth-stage impeller and the fifth-stage impeller face the driving end of the pump shaft 12; the impeller 14 at the discharge side comprises a sixth-stage impeller, a seventh-stage impeller, an eighth-stage impeller, a ninth-stage impeller and a tenth-stage impeller which are sequentially arranged from the non-driving end to the axis side of the pump shaft 12, and impeller suction ports of the sixth-stage impeller, the seventh-stage impeller, the eighth-stage impeller, the ninth-stage impeller and the tenth-stage impeller face the non-driving end of the pump shaft 12; five impellers of the suction side impeller 13 and five impellers of the discharge side impeller 14 are symmetrically arranged back to back, and the arrangement mode can self balance the axial force, so that the balance system has a simple structure; and a complex balance mechanism is not required to be configured, and the pump is safer and more reliable to operate when a medium containing a solid shell is conveyed.

Hub sealing rings 16 are arranged on the first-stage impeller, the second-stage impeller, the third-stage impeller, the fourth-stage impeller, the fifth-stage impeller, the sixth-stage impeller, the seventh-stage impeller, the eighth-stage impeller, the ninth-stage impeller and the tenth-stage impeller, interstage bushes 4 are arranged between the outer sides of the hub sealing rings 16 on the first-stage impeller, the second-stage impeller, the third-stage impeller, the fourth-stage impeller, the sixth-stage impeller, the seventh-stage impeller, the eighth-stage impeller and the ninth-stage impeller and the pump body 1, and intermediate bushes 5 are arranged between the outer sides of the hub sealing rings 16 on the fifth-stage impeller and the tenth-stage impeller and the pump body 1.

In addition, the shaft diameter of the pump shaft 12 is increased, the width of a flow channel is reduced, the span ratio between the pump shaft 12 and a bearing is increased, and the deflection of a rotor is reduced; the interstage bushings 4 are made into a middle-open structure, so that the impeller is convenient to mount and dismount.

The working process of the horizontal split axial subdivision ten-stage centrifugal pump is explained by combining the accompanying drawings and the technical scheme: the medium enters the suction flow channel from the suction inlet and then enters the first-stage impeller → the interstage short flow channel enters the second-stage impeller → the second-stage impeller, the third-stage impeller and the fourth-stage impeller, all of which flow to the fifth-stage impeller through the interstage short flow channel → then enters the sixth-stage impeller through the transition long flow channel → enters the seventh-stage impeller, the eighth-stage impeller, the ninth-stage impeller and the tenth-stage impeller through the interstage short flow channel → finally passes through the discharge flow channel to the discharge outlet.

It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the utility model.

Claims

1. The horizontal split axial split ten-stage centrifugal pump comprises a pump body, a pump cover, an impeller and a bearing component, wherein the pump cover is fixedly connected with the pump body through a fastening bolt, a pump shaft penetrates through the pump body, and the impeller is arranged on the pump shaft; the method is characterized in that: a driving end bearing part and a driving end mechanical seal are arranged on one side of the driving end of the pump shaft, and a non-driving end bearing part and a non-driving end mechanical seal are arranged on one side of the non-driving end of the pump shaft; the impeller comprises an intake-side impeller and a discharge-side impeller, the number of the intake-side impeller and the number of the discharge-side impeller are five respectively, a half-dividing snap ring is arranged between each impeller and the pump shaft, and each impeller is independently positioned on the pump shaft through the half-dividing snap ring; an impeller sealing ring and a shell sealing ring are arranged between each impeller and the pump body, and the shell sealing ring is arranged on the outer side of the impeller sealing ring; a drive end throat bush is arranged between the pump shaft positioned on the drive end side of the suction side impeller and the pump body, a pressure relief shaft sleeve and a non-drive end throat bush are arranged between the pump shaft positioned on the non-drive end side of the discharge side impeller and the pump body, and a pressure relief bush is arranged between the outer side of the pressure relief shaft sleeve and the pump body; a suction inlet and a discharge outlet are arranged below the pump body, and a balance pipe is also arranged below the pump body;

2. The horizontal split axial split ten-stage centrifugal pump according to claim 1, characterized in that: the pump body and the pump cover are in a horizontal split structure and are axially split.

3. The horizontal split axial split ten-stage centrifugal pump according to claim 1, characterized in that: the impeller at the suction side and the impeller at the discharge side are provided with a middle lining between, the middle lining is connected with the pump shaft through a middle shaft sleeve, and the impeller at the suction side and the impeller at the discharge side are symmetrically arranged on the pump shaft at two sides of the middle lining.

4. The horizontal split axial split ten-stage centrifugal pump according to claim 1, characterized in that: the pump is characterized in that hub sealing rings are arranged on the first-stage impeller, the second-stage impeller, the third-stage impeller, the fourth-stage impeller, the fifth-stage impeller, the sixth-stage impeller, the seventh-stage impeller, the eighth-stage impeller, the ninth-stage impeller and the tenth-stage impeller, interstage bushes are arranged between the outer sides of the hub sealing rings on the first-stage impeller, the second-stage impeller, the third-stage impeller, the fourth-stage impeller, the sixth-stage impeller, the seventh-stage impeller, the eighth-stage impeller and the ninth-stage impeller and the pump body, and middle bushes are arranged between the outer sides of the hub sealing rings of the fifth-stage impeller and the tenth-stage impeller and the pump body.