CN111022332A - Axially split sectional type multistage pump and manufacturing method thereof - Google Patents

Axially split sectional type multistage pump and manufacturing method thereof Download PDF

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Publication number
CN111022332A
CN111022332A CN202010011080.6A CN202010011080A CN111022332A CN 111022332 A CN111022332 A CN 111022332A CN 202010011080 A CN202010011080 A CN 202010011080A CN 111022332 A CN111022332 A CN 111022332A
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CN
China
Prior art keywords
pump
sectional type
shell
core assembly
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010011080.6A
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Chinese (zh)
Inventor
潘世群
王立
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changsha Zhonglian Pump Co Ltd
Original Assignee
Changsha Zhonglian Pump Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changsha Zhonglian Pump Co Ltd filed Critical Changsha Zhonglian Pump Co Ltd
Priority to CN202010011080.6A priority Critical patent/CN111022332A/en
Publication of CN111022332A publication Critical patent/CN111022332A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Abstract

The invention discloses an axially split sectional type multistage pump and a manufacturing method thereof, and the pump comprises a pump cover, a sectional type pump core assembly and a pump body, wherein the pump cover and the pump body are combined together through the joint surfaces to form a pump shell, the shell is provided with a hollow cavity, and the sectional type pump core assembly is arranged in the hollow cavity of the shell and is coaxial with the shell; the sealing gasket is arranged between the joint surfaces of the pump cover and the pump body and plays a role in sealing; the pump cover is connected with the pump body through bolts and is positioned through two conical pins arranged at opposite angles. The segmented pump core assembly has an outer cylindrical surface and right each has an outer conical surface. The pump body is provided with a horizontal inlet and a flange, the suction section is provided with a horizontal water inlet, and the horizontal inlet is opposite to the horizontal water inlet; the pump cover is provided with a vertical outlet and a flange, the outlet section is provided with a vertical water outlet, and the vertical outlet is opposite to the vertical water outlet. The pump has good integral rigidity, reliable sealing and good part universality, and is more suitable for high-temperature and high-pressure occasions.

Description

Axially split sectional type multistage pump and manufacturing method thereof
Technical Field
The invention relates to the field of water pumps, in particular to an axially split sectional type multistage pump and a manufacturing method thereof.
Background
The multistage pump is a pump which is commonly applied and is widely applied to the fields of electric power, metallurgy, mines, municipal administration, ships, petroleum, chemical industry and the like. Multistage pumps are generally classified into axial split multistage pumps and segmented multistage pumps.
In the prior art, the sectional type multistage pump is positioned by overlapping an inner spigot and an outer spigot between a suction section, a middle section and a water outlet section step by step, along with the increase of the number of steps, the axial length of the pump is increased, the accumulation of positioning errors is large, the rigidity of the pump is reduced, the vibration is large, and the mechanical fault is increased; each spigot position is provided with a static seal, and when the number of stages is increased, the number of sealing positions is large, and certainly, the number of hidden leakage points is large. As temperature and pressure increase, stiffness decreases and the seal point is more susceptible to failure. Therefore, the prior art axial split multi-stage pump is not suitable for high temperature and high pressure applications.
The axial split type multi-stage pump in the prior art has good rigidity, but poor interchangeability, few universal parts and particularly prominent improvement along with the increase of the stage number, so that the technical economy of the multi-stage pump in the form is poor.
Disclosure of Invention
In order to solve the problems, the invention provides an axially split sectional type multi-stage pump which has the advantages of compact structure and good rigidity of the axially split sectional type multi-stage pump, has the advantage of good interchangeability of the sectional type multi-stage pump, and has the characteristics of safety, reliability and convenient maintenance.
The technical scheme adopted by the invention is as follows:
an axially split segmented multi-stage pump comprises a pump cover, a segmented pump core assembly and a pump body, wherein the pump cover and the pump body are combined together through a joint surface to form a pump shell, the shell is provided with a hollow cavity, and the segmented pump core assembly is arranged in the hollow cavity of the shell and is coaxial with the shell; the sealing gasket is arranged between the joint surfaces of the pump cover and the pump body and plays a role in sealing; the pump cover is connected with the pump body through bolts and is positioned through two conical pins arranged at opposite angles.
As a further improvement of the present invention, the segmented pump core assembly includes an intake section, a middle section, radial guide vanes, an impeller, a pump shaft, and an outlet section, and the segmented pump core assembly has an outer cylindrical surface and an outer conical surface on the right; the suction section, the middle section, the radial guide vane and the outlet section are connected with each other through the seam allowance.
As a further improvement of the invention, the shell formed by combining the pump cover and the pump body is provided with an inner cylindrical surface and inner conical surfaces respectively arranged on the left and the right, and the sectional type pump core assembly is positioned in the inner cylindrical surface and is compressed by the axial force of the inner conical surface acting on the outer conical surface.
As a further improvement of the present invention, the O-ring is embedded in the outer circular grooves of the suction section and the outlet section to seal the segment type pump core assembly and the casing of the pump.
As a further improvement of the invention, the pump body is provided with a horizontal inlet and a flange, the suction section is provided with a horizontal water inlet, and the horizontal inlet is opposite to the horizontal water inlet; the pump cover is provided with a vertical outlet and a flange, the outlet section is provided with a vertical water outlet, and the vertical outlet is opposite to the vertical water outlet.
As a further improvement of the invention, the stop openings of the suction section, the middle section and the outlet section are not provided with static seals.
As a further improvement of the invention, no tension element such as a lead screw is arranged between the suction section and the outlet section.
The invention also provides a manufacturing method of the axially split sectional type multistage pump, which comprises the following steps: after the assembly of the sectional type pump core assembly is finished, an outer cylindrical surface and a left outer conical surface and a right outer conical surface are processed at one time by taking an axis as a reference; the processing method of the pump body and the pump cover comprises the steps of firstly milling joint surfaces of the pump body and the pump cover respectively, clamping the sealing gasket between the two joint surfaces of the pump body and the pump cover and fastening and fixing the sealing gasket by using a clamp, drilling a bolt hole, then penetrating a bolt for fixing, then drilling two conical pin holes at opposite angles, driving a conical pin into the two conical pin holes, and finally processing a left cylindrical hole, a right cylindrical hole, an inner conical surface and a middle inner cylindrical surface on a boring machine at one time; the assembly sequence of the axially split sectional type multistage pump is that a sectional type pump core assembly is assembled firstly, the sectional type pump core assembly is arranged on a pump body, a sealing gasket is sealed, the pump cover is closed, a positioning conical pin is driven in, and the pump body is tightened by a bolt so as to form the pump cover.
Compared with the prior art, the axially split sectional type multistage pump and the manufacturing method thereof have the following beneficial effects:
1. the overall rigidity of the pump is good, and the positioning accuracy is high: the pump cover and the pump body attach together the casing that forms and have an interior cylinder and respectively have an interior conical surface about and, festival segmentation pump core assembly is located and is positioned in the interior cylinder, and suction section, middle section and export section are unified by the cylinder in common benchmark and are fixed a position, and positioning accuracy is very high, can not prior art the same accumulative error that appears. Meanwhile, the axial force generated by the inner conical surface of the shell acting on the outer conical surface of the sectional type pump core assembly is compressed, and the whole pump has good rigidity.
2. The hidden danger of leakage is less, and the sealing is reliable: the static sealing part between the pump and the outside is only two parts, one part is the static seal (the sealing part is a sealing gasket) between the pump cover and the pump body, the other part is the static seal (the sealing part is an O-shaped ring) between the shell and the sectional type pump core assembly, and the static sealing part is not increased along with the increase of the number of stages.
3. The parts have good universality and high interchangeability: the impeller, the middle section and the radial guide vane are not changed along with the increase of the stage number, and the interchangeability and the universality are good.
4. The machining method is high in precision and convenient to install, and high installation precision is guaranteed.
In conclusion, the axially-split segmented multistage pump and the manufacturing method thereof have the advantages of high positioning precision, good rigidity, reliable sealing and good part universality. Therefore, the present invention is more suitable for high temperature and high pressure occasions.
Drawings
The invention is further described with reference to the following figures and embodiments.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a left side view of the present invention.
Fig. 3 is a top view of the present invention.
FIG. 4 is a sectional core assembly of the present invention.
Fig. 5 is a schematic diagram of the combination of the pump cover and the pump body.
In the figure: 1. o-shaped sealing ring, 2, pump cover, 3, segmented pump core assembly, 4, pump body, 5, sealing gasket, 6, taper pin, 7, bolt, 31, suction section, 32, middle section, 33, radial guide vane, 34, impeller, 35, pump shaft, 36, outlet section, 100, outer conical surface, 101, outer cylindrical surface, 102, inner conical surface, 103, inner cylindrical surface
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
An axially split segmented multi-stage pump as shown in fig. 1 to 5 comprises a pump cover 2, a segmented pump core assembly 3, and a pump body 4, wherein the pump cover 2 and the pump body 4 are combined together through a joint surface to form a pump casing, the casing is provided with a hollow cavity, and the segmented pump core assembly 3 is arranged in the hollow cavity of the casing and is coaxial with the casing; the sealing gasket 5 is arranged between the joint surfaces of the pump cover 2 and the pump body 4 and plays a role in sealing; the pump cover 2 is connected with the pump body 4 through a bolt 7 and is positioned through two taper pins 6 arranged at opposite angles. The static seal of the shell only comprises the O-shaped seal ring 1 and the seal gasket 5, and compared with the sectional type multistage pump in the prior art, the sectional type multistage pump has the characteristic of less hidden leakage danger.
The sectional type pump core assembly 3 comprises an intake section 31, a middle section 32, a radial guide vane 33, an impeller 34, a pump shaft 35 and an outlet section 36, wherein the sectional type pump core assembly 3 is provided with an outer cylindrical surface 101 and outer conical surfaces 100 on the right; the suction section 31, the middle section 32, the radial guide vanes 33, the outlet section 36 are interconnected by a spigot. The outer conical surface 100 and the outer cylindrical surface 101 are formed in one step by machining, and the positioning accuracy is high.
The pump cover 2 and the pump body 4 are assembled to form a shell which is provided with an inner cylindrical surface and an inner conical surface on the left and the right, the sectional type pump core assembly 3 is positioned in the inner cylindrical surface 103 and is compressed through the axial force of the inner conical surface 102 acting on the outer conical surface 100, the positioning mainly depends on the inner conical surface 102 and the outer conical surface 100, the inner cylindrical surface 103 and the outer cylindrical surface 101 play a role in auxiliary positioning, and therefore, the sectional type pump core assembly 3 has high rigidity. The inner conical surface 102 and the inner cylindrical surface 103 are formed in one step by machining, and the positioning precision is high.
In the invention, the O-shaped sealing ring 1 is embedded in the outer circular grooves of the suction section 31 and the outlet section 36 to seal the sectional type pump core assembly 3 and the shell of the pump.
In the invention, the pump body 4 is provided with a horizontal inlet and a flange, the suction section 31 is provided with a horizontal water inlet, and the horizontal inlet is opposite to the horizontal water inlet; the pump cover 2 is provided with a vertical outlet and a flange, the outlet section 36 is provided with a vertical water outlet, and the vertical outlet is opposite to the vertical water outlet. When the pump works, liquid is sucked from the horizontal inlet, enters the suction section 31 through the horizontal water inlet, is sucked into the first-stage impeller 34 for pressurization, then enters the first-stage radial guide vane 33, then enters the next-stage impeller 34 for gradual pressurization, finally enters the outlet section 36, and flows out from the vertical water outlet of the outlet section 36 through the vertical outlet of the pump cover 2.
Static seals are not arranged at the stop openings of the suction section 31, the middle section 32 and the outlet section 36. No tensioning element such as a lead screw is arranged between the suction section 31 and the outlet section 36.
The manufacturing method of the axially split sectional type multistage pump comprises the following steps: after the assembly of the sectional type pump core assembly is finished, an outer cylindrical surface and a left outer conical surface and a right outer conical surface are processed at one time by taking an axis as a reference; the processing method of the pump body and the pump cover comprises the steps of firstly milling joint surfaces of the pump body and the pump cover respectively, clamping the sealing gasket between the two joint surfaces of the pump body and the pump cover and fastening and fixing the sealing gasket by using a clamp, drilling a bolt hole, then penetrating a bolt for fixing, then drilling two conical pin holes at opposite angles, driving a conical pin into the two conical pin holes, and finally processing a left cylindrical hole, a right cylindrical hole, an inner conical surface and a middle inner cylindrical surface on a boring machine at one time; the assembly sequence of the axially split sectional type multistage pump is that a sectional type pump core assembly is assembled firstly, the sectional type pump core assembly is arranged on a pump body, a sealing gasket is sealed, the pump cover is closed, a positioning conical pin is driven in, and the pump body is tightened by a bolt so as to form the pump cover.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. An axially split segmented multistage pump and a method of manufacturing the same, characterized in that: the pump cover and the pump body are combined through the joint surfaces to form a shell of the pump, the shell is provided with a hollow cavity, and the sectional type pump core assembly is arranged in the hollow cavity of the shell and is coaxial with the shell; the sealing gasket is arranged between the joint surfaces of the pump cover and the pump body and plays a role in sealing; the pump cover is connected with the pump body through bolts and is positioned through two conical pins arranged at opposite angles.
2. The axially split segmented multi-stage pump of claim 1, wherein: the sectional type pump core assembly comprises an intake section, a middle section, radial guide vanes, an impeller, a pump shaft and an outlet section, and is provided with an outer cylindrical surface and an outer conical surface on the right; the suction section, the middle section, the radial guide vane and the outlet section are connected with each other through the seam allowance.
3. The axially split segmented multi-stage pump of claim 1, wherein: the pump cover and the pump body are combined to form a shell, the shell is provided with an inner cylindrical surface and a left inner conical surface and a right inner conical surface, and the sectional type pump core assembly is positioned in the inner cylindrical surface and is compressed by axial force of the inner conical surface acting on the outer conical surface.
4. The axially split segmented multi-stage pump of claim 1, wherein: the O-shaped sealing ring is embedded in the outer circular grooves of the suction section and the outlet section to seal the sectional type pump core assembly and the shell of the pump.
5. The axially split segmented multi-stage pump of claim 1, wherein: the pump body is provided with a horizontal inlet and a flange, the suction section is provided with a horizontal water inlet, and the horizontal inlet is opposite to the horizontal water inlet; the pump cover is provided with a vertical outlet and a flange, the outlet section is provided with a vertical water outlet, and the vertical outlet is opposite to the vertical water outlet.
6. The axially split segmented multi-stage pump of claim 1, wherein: and the stop openings of the suction section, the middle section and the outlet section are not provided with static seals.
7. The axially split segmented multi-stage pump of claim 1, wherein: tension elements such as a lead screw and the like are not arranged between the suction section and the outlet section.
8. A method for manufacturing an axially split segmented multistage pump is characterized in that: after the assembly of the sectional type pump core assembly is finished, an outer cylindrical surface and a left outer conical surface and a right outer conical surface are processed at one time by taking an axis as a reference; the processing method of the pump body and the pump cover comprises the steps of firstly milling joint surfaces of the pump body and the pump cover respectively, clamping the sealing gasket between the two joint surfaces of the pump body and the pump cover and fastening and fixing the sealing gasket by using a clamp, drilling a bolt hole, then penetrating a bolt for fixing, then drilling two conical pin holes at opposite angles, driving a conical pin into the two conical pin holes, and finally processing a left cylindrical hole, a right cylindrical hole, an inner conical surface and a middle inner cylindrical surface on a boring machine at one time; the assembly sequence of the axially split sectional type multistage pump is that a sectional type pump core assembly is assembled firstly, the sectional type pump core assembly is arranged on a pump body, a sealing gasket is sealed, the pump cover is closed, a positioning conical pin is driven in, and the pump body is tightened by a bolt so as to form the pump cover.
CN202010011080.6A 2020-01-06 2020-01-06 Axially split sectional type multistage pump and manufacturing method thereof Pending CN111022332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010011080.6A CN111022332A (en) 2020-01-06 2020-01-06 Axially split sectional type multistage pump and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010011080.6A CN111022332A (en) 2020-01-06 2020-01-06 Axially split sectional type multistage pump and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN111022332A true CN111022332A (en) 2020-04-17

Family

ID=70198615

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010011080.6A Pending CN111022332A (en) 2020-01-06 2020-01-06 Axially split sectional type multistage pump and manufacturing method thereof

Country Status (1)

Country Link
CN (1) CN111022332A (en)

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