CN114412822A - Coupling mechanism capable of preventing axial movement and centrifugal pump thereof - Google Patents

Coupling mechanism capable of preventing axial movement and centrifugal pump thereof Download PDF

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Publication number
CN114412822A
CN114412822A CN202210064830.5A CN202210064830A CN114412822A CN 114412822 A CN114412822 A CN 114412822A CN 202210064830 A CN202210064830 A CN 202210064830A CN 114412822 A CN114412822 A CN 114412822A
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CN
China
Prior art keywords
bearing
pump
shaft
motor
coupling mechanism
Prior art date
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Pending
Application number
CN202210064830.5A
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Chinese (zh)
Inventor
蒋龙福
蒋列锋
吴介军
郭丹枫
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Yixing Zeus Pump Manufacture Co ltd
Original Assignee
Yixing Zeus Pump Manufacture 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 Yixing Zeus Pump Manufacture Co ltd filed Critical Yixing Zeus Pump Manufacture Co ltd
Priority to CN202210064830.5A priority Critical patent/CN114412822A/en
Publication of CN114412822A publication Critical patent/CN114412822A/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • F04D29/044—Arrangements for joining or assembling shafts
    • 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
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings 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
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a centrifugal pump capable of preventing axial movement of a pump shaft, which relates to the field of centrifugal pumps and comprises a motor and a pump body, wherein the pump body is connected with the motor through a pump shaft, the impeller and the pump shaft are integrally manufactured and molded to form a long-handle impeller, a transitional coupling shaft sleeve is arranged between the end part of the pump shaft of the long-handle impeller and a shaft head of the motor, one end of the transitional coupling shaft sleeve is inserted into a central connecting hole of the long-handle impeller, the other end of the transitional coupling shaft sleeve is sleeved on the shaft head of the motor, an axial movement prevention coupling mechanism is additionally arranged at the joint of the shaft head of the motor and the transitional coupling shaft sleeve, the axial movement prevention coupling mechanism comprises a connecting support and a bearing support, the connecting support is used for mounting the motor and the pump body of the centrifugal pump, the bearing support comprises a base body, a bearing culvert arranged on the base body, a bearing and a bearing gland arranged in the bearing culvert, the bearing is fixedly arranged in the bearing culvert, and the bearing support and the connecting support are in an integrated or split combined structure, the motor mounting disc is fixedly mounted with the connecting bracket. The axial seal device has the advantages of no axial play, good shaft seal stability and difficult damage.

Description

Coupling mechanism capable of preventing axial movement and centrifugal pump thereof
Technical Field
The invention relates to the field of manufacturing of centrifugal pumps, in particular to a centrifugal pump with a motor and pump shaft direct-connected structure.
Background
The direct-coupled centrifugal pump in the prior art is a direct connection of a motor shaft head and a pump shaft of a pump machine, and is not provided with a transition device, and has the advantages of small installation volume, manufacturing cost saving and low power consumption, but the centrifugal pump of the type does not have the following defects:
firstly, the axial float of motor pump shaft is the problem that the motor often takes place, but the safe operation of the axial float of motor pump shaft direct impact pump shaft, and this kind of float enables the pump machine to seal the specific pressure between ring, the quiet ring and changes: namely, the moving ring moves forwards, the specific pressure between the moving ring 1 and the static ring 2 is increased, and the mechanical seal is damaged as a result; if the motor shaft moves backwards, namely the pump shaft is driven to move backwards, the specific pressure between the sealing movable ring and the sealing static ring is reduced, and leakage can be caused. (as in FIG. 1)
The second hidden danger of the axial movement exists, namely, after the pump shaft moves, the position of the pump shaft of the pump body moves back and forth, the front-back distance between the impeller 3 of the pump and the pump cavity is changed, the volumetric efficiency of the pump is directly influenced, and sometimes the impeller 3 and the pump body 4 are rubbed, so that the impeller or the pump is damaged due to friction. These deficiencies, as described above, have long existed in the industry.
A third disadvantage of the prior art is that: in the prior art, a direct-connected pump must be assembled with a motor to form a whole assembly, so that a customer can purchase the assembly with the motor when purchasing the pump, if the customer does not purchase the motor, the customer can only purchase a pile of scattered components including a pump shell, a pump shaft, a seal, an impeller, a pump cover, a support and the like if purchasing a pump component singly. In transaction and use, it is very inconvenient, all have the inconvenience of different degrees including transportation, storage, installation, debugging, especially after the customer buys the subassembly, will assemble by oneself, the quality problem of product will be formed in the debugging of oneself, influences user's result of use, can consequently cause the pump machine to damage sometimes, influences the operation effect of equipment.
The above disadvantages affect the product manufacturing, product quality and service system of the centrifugal pump in the direct connection type, and therefore, improvement and promotion are still needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the coupling mechanism which is free from axial movement, has good shaft sealing stability and is not easy to damage, and the centrifugal pump thereof.
In order to realize the purpose of the invention, a first technical scheme is provided: the utility model provides a centrifugal pump is with preventing axial float coupling mechanism for being connected of motor spindle nose and pump shaft, motor spindle nose and the direct fixed connection of pump shaft spindle nose, its characterized in that is including coupling support and the bearing bracket that is used for installing the motor and the centrifugal pump body, the bearing bracket includes the base member, set up bearing culvert (bearing culvert) on the base member, set up bearing in the bearing culvert, and bearing gland, the bearing suit is on the spindle nose of pump shaft, bearing fixed mounting is in the bearing culvert, bearing bracket and coupling support formula as an organic whole or split type integrated configuration, motor mounting disc and coupling support fixed mounting.
Preferably, the bearing contained in the bearing is provided as at least one.
Preferably, the connection structure of the motor shaft head and the pump shaft head is a sleeve-insertion type anti-torque connection of the pump shaft head and the motor shaft head sleeved by the pump shaft head. Preferably, the shaft head of the pump shaft is provided with a gear-shaped or spline-shaped shaft hole, and the shaft head of the motor is provided with a gear-shaped or spline-shaped convex strip which are in coupling sleeve joint.
Further preferably, the connecting structure of the motor shaft head and the pump shaft head is characterized in that the motor shaft head and the pump shaft head are respectively provided with a connecting flange, and the two flanges are fastened and connected through a pin and a rubber elastic ring.
Preferably, the connecting bracket, the suction inlet tee joint and the pump cover are manufactured integrally.
Preferably, the bearing side is provided with a thrust nut, and the thrust nut is screwed on an external thread processed on the shaft head of the pump shaft.
Preferably, the axial float prevention coupling mechanism for the centrifugal pump is applied to a side-suction centrifugal pump, and the side-suction centrifugal pump comprises a pump body, a pump cover, a pump shaft, a suction inlet tee joint and a shaft sealing assembly. The side suction centrifugal pump is a vertical centrifugal pump or a horizontal centrifugal pump.
In order to realize the purpose of the invention, a second technical scheme is provided: a centrifugal pump preventing axial movement of a pump shaft comprises a motor and a pump body, wherein the pump body is connected with the motor through a pump shaft, one end of the pump shaft is connected with a motor driving shaft, the other end of the pump shaft extends into the pump body to be connected with an impeller, the pump body comprises a suction inlet tee joint, a pump cover and a pump shell in sequence from top to bottom, a shaft sealing assembly is arranged at the upper end of the suction inlet tee joint, the anti-axial-movement coupling mechanism is characterized in that an anti-axial-movement coupling mechanism is additionally arranged at the joint of the motor shaft head and the pump shaft head, the anti-axial-movement coupling mechanism comprises a connecting support and a bearing frame, the connecting support is used for mounting a motor and a centrifugal pump body, the bearing frame comprises a base body, a bearing culvert arranged on the base body, a bearing and a bearing gland are arranged in the bearing culvert, the bearing is sleeved on the shaft head of the pump shaft, the bearing is fixedly mounted in the bearing culvert, the bearing frame and the connecting support are of an integrated or split combined structure, and a motor mounting disc is fixedly mounted with the connecting support.
Preferably, the split-type combined structure of the bearing frame and the connecting support is that the base body of the bearing frame is fixedly connected with the flange plate of the connecting support or the base body of the bearing frame comprises a flange part and a bearing culvert part, the flange part is fixedly connected with the flange plate of the connecting support and the mounting plate of the motor correspondingly, the bearing culvert part is connected with the flange part, and the bearing culvert part is provided with a bearing culvert and a bearing gland.
In order to realize the purpose of the invention, a third technical scheme is provided: a centrifugal pump for preventing axial movement of pump shaft is composed of a motor, a pump body connected to said motor via pump shaft, a long-handle impeller with a central connecting hole for inserting one end of said connecting shaft sleeve, a long-handle axle head with a central connecting hole, a transition connecting axle sleeve between the end of pump shaft and the axle head of motor, and a bearing frame consisting of a base body, a bearing on said base body, a bearing in said bearing and a bearing gland, and a bearing cover on said transition connecting axle sleeve, the motor mounting disc is fixedly mounted with the connecting bracket.
The invention has the beneficial effects that:
the invention is characterized in that: the anti-axial-play structure is additionally arranged on the basis of the prior art, and the pump shaft of the pump is fixed through the bearing and the bearing box and cannot move radially and axially, so that the structure and the characteristics of the direct-coupled centrifugal pump are changed, the problem of unstable sealing force of a shaft seal movable ring and a static ring due to the fact that the direct-coupled centrifugal pump is easy to move axially for a long time is solved, the problem of damage of a mechanical seal is further caused, the direct-coupled centrifugal pump can have a packaging function, all parts of the working end of the centrifugal pump are integrated, the storage, the transportation and the installation of products are facilitated, and the use effect of the centrifugal pump is improved.
The method specifically comprises the following steps:
1. the improved direct-coupled centrifugal pump effectively controls the axial float of the pump shaft of the pump, further controls the specific pressure between the moving ring and the static ring of the mechanical seal of the pump, prevents the pressure between the moving ring and the static ring from changing due to the axial float of the pump to damage the mechanical seal, and improves the stability of the seal of the pump.
2. The improved centrifugal pump has no axial play and controls the up-and-down running distance between the impeller and the pump body, so that the volumetric efficiency of the pump is improved.
3. Under the condition that the direct-connected centrifugal pump does not contain a motor, the centrifugal pump can be integrated into an assembly whole without the motor, and the storage, the transportation and the installation of products are convenient.
Drawings
Fig. 1 is a schematic structural diagram of a direct-coupled centrifugal pump in the prior art.
Fig. 2 is a schematic structural view of embodiment 1.
Fig. 3 is a schematic structural view of an open impeller.
Fig. 4 is a schematic structural view of a closed impeller.
Fig. 5 is a structural schematic diagram of an impeller with a long handle.
Fig. 6 is a schematic view of a shaft seal in the form of a lip seal.
Fig. 7 is a schematic structural view of embodiment 2.
Fig. 8 is a partially enlarged view of the shaft head of the pump shaft and the shaft head of the motor in a sleeved manner.
Fig. 9 is a schematic view of gear-like coupling between a pump shaft head and a motor shaft head.
FIG. 10 is a schematic view of spline-like coupling between a pump shaft head and a motor shaft head.
Fig. 11 is a schematic view of a pump flow element of a metallic material.
Fig. 12 is a schematic view of the mounting block being secured to the pump housing.
Fig. 13 is a schematic view of a nut with a thrust function mounted on the bearing side.
FIG. 14 is a schematic view of the suction inlet tee joint and the pump cover fixedly connected by bolts.
FIG. 15 is a schematic structural view of example 3.
FIG. 16 is a schematic structural view of example 4.
FIG. 17 is a schematic structural view of example 5.
FIG. 18 is a schematic structural view of example 6.
Fig. 19 is a schematic structural view of a side-suction horizontal direct-coupled pump in embodiment 7.
FIG. 20 is a schematic structural view of a front suction type horizontal direct connection pump according to embodiment 7.
FIG. 21 is a schematic structural view of example 8.
FIG. 22 is a schematic structural view of example 9.
Detailed Description
Example 1: as shown in fig. 2, a centrifugal pump for preventing axial movement of a pump shaft comprises a motor 1 and a pump body 2, wherein the pump body 2 is connected with the motor 1 through a pump shaft 3, the pump shaft 3 is provided with a shaft sleeve 4, one end of the pump shaft 3 is connected with a main shaft of the motor 1, the other end of the pump shaft extends into the pump body and is connected with an impeller 9, the pump body 2 sequentially comprises a suction inlet tee joint 2.1, a pump cover 2.2 and a pump shell 2.3 from top to bottom, a shaft seal assembly 5 is arranged at the upper end of the suction inlet tee joint 2.1, the shaft seal assembly 5 comprises a seal box 5.1, a mechanical seal 5.2 for driving a stationary ring and a stationary ring gland 5.3, the seal box 5.1 is sealed with the top end of the suction inlet tee joint 2.1, the stationary ring 5.2.1 is arranged on the seal box 5.1, the stationary ring gland 5.3 is pressed on the shaft head 5.2.1 of the stationary ring and is connected with the top end of the suction inlet tee joint 2.1, the shaft 5.2.2.2.1 is connected with an axial movement preventing mechanism, the coupling mechanism for preventing axial movement comprises a connecting support 6 and a bearing frame 7, wherein the connecting support 6 and the bearing frame 7 are used for mounting a motor 1 and a pump body 2, the bearing frame 7 comprises a base body 7.1, a bearing culvert 7.1.1 is arranged on the base body 7.1, a bearing 7.2 and a bearing gland 7.3 are arranged in the bearing culvert 7.1.1, the bearing 7.2 is sleeved on a shaft head 3.1 of a pump shaft 3, the bearing 7.2 is fixedly arranged in a step of a fixed bearing in the bearing culvert 7.1.1 and is pressed and fixed through the bearing gland 7.3, the bearing frame 7 and a flange 6.1 of the connecting support 6 are of an integrally formed structure, and the motor mounting plate 1.2 is fixedly connected with the flange 6.1 of the connecting support through bolts. The upper end of the pump body 2 is fixedly connected with a flange 6.2 at the lower end of the connecting support, and the flange 6.2 at the lower end is also provided with a mounting seat 8. The pump shell 2.3, the pump cover 2.2, the suction inlet tee joint 2.1 and the impeller 5 are made of steel lining plastic structures.
The bearing culvert 7.1.1 refers to a cavity for accommodating and installing the fixed bearing 7.2.
The plastic of the steel lining plastic is made of ultra-high molecular polyethylene with the molecular weight of 500 ten thousand, and the lining plastic process is made according to the conventional lining plastic method of the prior art.
The pump shaft 3 is made of carbon steel or stainless steel, and an inward-concave barrel sleeve part 3.1.1 is arranged at one end of the pump shaft head 3.1 matched with the motor shaft head 1.1 during manufacturing. The sleeve part 3.1.1 is arranged to be inserted and connected with the motor shaft head 1.1. The inner wall of the sleeve part 3.1.1 is provided with a key groove 3.1.2. The pump shaft head 3.1 is connected with the motor shaft head 1.1 through a connecting key. The mounting seat 8 is made of metal materials according to a conventional machining method.
The shaft sleeve 4 is made of a non-metal material or a metal material, and is determined according to the anti-corrosion requirement of a use post, which is not limited in this embodiment.
Each part can be installed after being manufactured: firstly, sleeving a bearing 7.2 on a shaft head of a pump shaft, sleeving a shaft head 3.1 of the pump shaft and the bearing 7.2 on a bearing culvert 7.1.1, covering a bearing gland 7.3, screwing a gland bolt, and sleeving a shaft sleeve 4 and a mechanical seal movable ring 5.2.2 on the pump shaft 3; and then the suction inlet tee joint 2.1 is provided with a sealing box 5.1, a mechanical seal static ring 5.2.1 and a static ring gland 5.3, the suction inlet tee joint 2.1 is arranged on the pump cover 2.2, the suction inlet tee joint 2.1 is sleeved on the pump shaft 3, the pump shaft 3 is sequentially provided with an impeller 9 and an impeller locking nut 10, and the pump body 2 is assembled together by a connecting bracket 6. And the connecting bracket 6 and the pump shell 2.3 are used for clamping and fixing the mounting part of the suction inlet tee joint 2.1.
After the installation process is completed, an assembly of the vertical direct-connection centrifugal pump without a motor and a mounting seat is obtained. Further, the mounting base 8, the motor 1 and the centrifugal pump assembly are assembled together, so that a complete blank of the direct-coupled centrifugal pump with the function of preventing the pump shaft from moving is obtained, and the blank can be used as a finished product to leave a factory after debugging, painting and packaging.
Example 2:
referring to example 1, as shown in fig. 7, the remaining features are unchanged, the mechanical seal 5.2 is referred to as a mechanical seal for short, in order to adapt to the transportation of a medium with a higher temperature and prevent the excessive rise of the sealing temperature, it is better to arrange an oil storage pan 11 on one side of the stationary ring 5.2.1, fill the oil storage pan 11 with lubricating oil, partially immerse the stationary ring 5.2.1 in the lubricating oil, increase the lubrication of the mechanical seal and reduce the temperature. In order to prevent the mud in the pump cavity from contacting the movable ring 5.2.2 and the static ring 5.2.1 of the mechanical seal and influencing the service life of the mechanical seal, a lip-shaped rubber ring 12 is arranged below the static ring 5.2.1 for blocking sand. In order to reduce the working temperature of the mechanical seal of the direct connection centrifugal pump, a good method is that a wind wheel 13 is arranged on the pump shaft 3 and above the moving ring 5.2.2, and the working temperature of the mechanical seal is reduced by the generated wind.
Example 3:
referring to embodiment 1, as shown in fig. 15, with reference to the embodiment 1, the rest features are unchanged, the bearing bracket 7 and the flange 6.1 of the connecting bracket 6 are of a split structure, the base body 7.1 of the bearing bracket 7 is an independent mounting plate, a bearing culvert 7.1.1 for placing a bearing is arranged in the mounting plate, the mounting plate is clamped between the motor mounting plate 1.2 and the flange 6.1 of the connecting bracket, and the three are fastened and connected through bolts, so that the purpose of controlling the axial movement of the pump shaft 3 and the integrated installation of the direct-coupled pump can be achieved.
Example 4:
referring to embodiment 1, as shown in fig. 16, with the rest features unchanged, the split type combination structure of the bearing bracket 7 and the connecting bracket 6 is that the flange 6.1 of the connecting bracket is fixedly connected with the base body 7.1 of the bearing bracket 7 through bolts, the base body 7.1 is provided with a bearing culvert 7.1.1 and a bearing gland 7.3, and the bearing 7.2 is installed in the bearing culvert 7.1.1. The connecting structure of the motor shaft head 1.1 and the pump shaft head 3.1 is characterized in that the motor shaft head 1.1 and the pump shaft head 3.1 are both provided with connecting flanges, and the two flanges are in bolt fastening connection through a pin 14 and a rubber elastic ring 15. The structure of the embodiment can enable the space of the connecting part of the motor shaft head 1.1 and the pump shaft head 3.1 to be a little larger, and is more suitable for installing a coupling part with large torsion resistance.
Example 5:
as shown in fig. 17, referring to embodiment 1, the other features are unchanged, the base body 7.1 of the bearing holder 7 includes a flange portion 7.1a and a bearing culvert portion 7.1b, the flange portion 7.1a is fixedly connected to the flange 6.1 of the connecting bracket and the mounting plate 1.2 of the motor by corresponding bolts, the bearing culvert portion 7.1b is connected to the flange portion 7.1a by bolts, and the bearing culvert portion 7.1b is provided with the bearing culvert 7.1.1 and the bearing gland 7.3. The connecting structure of the motor shaft head 1.1 and the pump shaft head 3.1 is characterized in that the motor shaft head 1.1 and the pump shaft head 3.1 are both provided with connecting flanges, and the two flanges are in bolt fastening connection through a pin 14 and a rubber elastic ring 15. The structure of the embodiment can enable the space of the connecting part of the motor shaft head 1.1 and the pump shaft head 3.1 to be a little larger, and is more suitable for installing a coupling part with large torsion resistance.
Example 6:
referring to embodiment 1, as shown in fig. 18, with the remaining features unchanged, the connection bracket 6 is integrally manufactured with the suction inlet tee joint 2.1 and the pump cover 2.2.
The purpose of adopting this kind of structure is to simplify the structure, reduce cost, but this kind of structure is only suitable for the non-corrosive use post.
Example 7: as shown in fig. 19 and 20, the direct centrifugal pump is a horizontal centrifugal pump, and the mounting seat 8 of the centrifugal pump is arranged on one side of the motor 1 and the pump body 2.
The flow passage component of the direct-coupled horizontal centrifugal pump can be made of non-metal or metal materials. The non-metallic material may be plastic and ceramic.
Example 8:
as shown in fig. 21, a centrifugal pump for preventing axial movement of a pump shaft comprises a motor 1 and a pump body 2, the pump body 2 is connected with the motor 1 through a pump shaft 3, an impeller 9 and the pump shaft 3 are integrally manufactured and formed to form a long-handle impeller, a transition connection shaft sleeve 16 is arranged between the end part of the pump shaft of the long-handle impeller and a motor shaft head 1.1, one end of the transition connection shaft sleeve 16 is inserted in a central connecting hole of the long-handle impeller, the other end of the transition connection shaft sleeve is sleeved on the motor shaft head 1.1, an axial movement prevention coupling mechanism is additionally arranged at the joint of the motor shaft head 1.1 and the transition connection shaft sleeve 16, the axial movement prevention coupling mechanism comprises a coupling bracket 6 and a bearing frame 7 for mounting the motor 1 and the pump body 2, the bearing frame 7 comprises a base body 7.1, a bearing culvert 7.1.1 arranged on the base body 7.1, a bearing 7.2 arranged in the bearing culvert 7.1.1 and a bearing gland 7.3, the bearing 7.2 is sleeved on the transition connection shaft sleeve 15, the bearing 7.2 is fixedly arranged in the bearing culvert 7.1.1, the bearing frame 7 and the connecting support 6 are of an integrated structure, and the motor mounting disc 1.2 and the connecting support flange 6.1 are fixedly mounted. A metal impeller core 5.1 is embedded in the long handle of the long-handle plastic impeller.
Example 9:
referring to example 8, as shown in fig. 22, the remaining features are unchanged, and in order to prevent the impeller from being detached from the motor shaft, it is good to make a hole in the center of the motor shaft head 1.1 and the transition coupling sleeve 16, and to provide a tie bolt 17 to hang down the long handle of the long handle impeller. The long-handle impeller is a plastic impeller.
In the centrifugal pump structure in the embodiments 8 and 9, the shaft seal is arranged on the plastic-coated long handle of the impeller, so that the corrosion resistance of the centrifugal pump can be improved.
The mounting 8 described in embodiment 1 may be arranged fixed to the pump housing (see fig. 12).
The material of the flow passage component of the centrifugal pump of embodiment 1 may be a metal material or a non-metal material. The non-metallic material can be one or more of plastic, ceramic, rubber, resin and other non-metallic materials.
The bearing in embodiment 1 may be selected to have a thrust or retaining function according to the axial play inertia generated by the structure of the centrifugal pump, and is not limited in this embodiment.
In order to prevent axial play of the mounting disk bearing 7.2, it is effective to provide the bearing side with a nut 17 with a thrust function, as shown in fig. 13).
The suction inlet tee joint 2.1 described in embodiment 1 can be fixedly connected with the pump cover 2.2 by bolts 19 (as shown in fig. 14).
In the above embodiments 1 to 9, the impeller may be an open impeller (as shown in fig. 3) or a closed impeller (as shown in fig. 4).
The impeller can be a through-shaft impeller (as shown in figure 4) or a long-handle end socket impeller (as shown in figure 5).
The shaft seal may be a lipped rubber ring seal 20 (see fig. 6).
The pump shaft head 3.1 in embodiment 1 can be provided with a gear-shaped or spline-shaped shaft hole, and the motor shaft head 1.1 is provided with a gear-shaped or spline-shaped convex strip, and the two are coupled and sleeved. As shown in fig. 8, 9, 10.

Claims (12)

1. The utility model provides a centrifugal pump is with preventing axial float coupling mechanism for being connected of motor spindle nose and pump shaft, motor spindle nose and the direct fixed connection of pump shaft spindle nose, its characterized in that is including coupling support and the bearing bracket that is used for installing the motor and the centrifugal pump body, the bearing bracket includes the base member, set up the bearing on the base member and contain, set up bearing and bearing gland in the bearing contains, the bearing suit is on the spindle nose of pump shaft, bearing fixed mounting is in the bearing contains, bearing bracket and coupling support formula as an organic whole or split type integrated configuration, motor mounting disc and coupling support fixed mounting.
2. The anti-axial-shift coupling mechanism for the centrifugal pump according to claim 1, wherein at least one bearing is provided in the bearing housing.
3. The coupling mechanism of claim 1, wherein the connection between the motor shaft head and the pump shaft head is a sleeve-type anti-torque connection in which the motor shaft head is wrapped by the pump shaft head.
4. The coupling mechanism of claim 3, wherein the shaft head of the pump shaft is provided with a gear-shaped or spline-shaped shaft hole, and the shaft head of the motor shaft is provided with a gear-shaped or spline-shaped protrusion strip, which are coupled and sleeved.
5. The coupling mechanism of claim 1, wherein the motor shaft head and the pump shaft head are connected by a connecting flange, and the two flanges are fastened and connected by a pin and a rubber elastic ring.
6. The coupling mechanism of claim 1, wherein the coupling bracket is integrally formed with the suction inlet tee and the pump cover.
7. The coupling mechanism of claim 1, wherein the thrust nut is disposed on the bearing side and screwed onto an external thread formed on the shaft head of the pump shaft.
8. The coupling mechanism for preventing axial play for a centrifugal pump according to any one of claims 1 to 7, wherein the coupling mechanism is applied to a side-suction centrifugal pump, and the side-suction centrifugal pump comprises a pump body, a pump cover, a pump shaft, a suction inlet tee joint and a shaft seal assembly.
9. The axial play prevention coupling mechanism for the centrifugal pump according to claim 8, wherein the side suction type centrifugal pump is a vertical centrifugal pump or a horizontal centrifugal pump.
10. A centrifugal pump preventing axial movement of a pump shaft comprises a motor and a pump body, wherein the pump body is connected with the motor through a pump shaft, one end of the pump shaft is connected with a motor driving shaft, the other end of the pump shaft extends into the pump body to be connected with an impeller, the pump body comprises a suction inlet tee joint, a pump cover and a pump shell in sequence from top to bottom, a shaft sealing assembly is arranged at the upper end of the suction inlet tee joint, the anti-axial-movement coupling mechanism is characterized in that an anti-axial-movement coupling mechanism is additionally arranged at the joint of the motor shaft head and the pump shaft head, the anti-axial-movement coupling mechanism comprises a connecting support and a bearing frame, the connecting support is used for mounting a motor and a centrifugal pump body, the bearing frame comprises a base body, a bearing culvert arranged on the base body, a bearing and a bearing gland are arranged in the bearing culvert, the bearing is sleeved on the shaft head of the pump shaft, the bearing is fixedly mounted in the bearing culvert, the bearing frame and the connecting support are of an integrated or split combined structure, and a motor mounting disc is fixedly mounted with the connecting support.
11. The centrifugal pump of claim 10, wherein the split combination of the bearing bracket and the connecting bracket is such that the base of the bearing bracket is fixedly connected to the flange of the connecting bracket or the base of the bearing bracket includes a flange portion and a bearing receiving portion, the flange portion is fixedly connected to the flange of the connecting bracket and the mounting plate of the motor, the bearing receiving portion is connected to the flange portion, and the bearing receiving portion is provided with a bearing receiving and a bearing pressing cover.
12. A centrifugal pump for preventing axial movement of pump shaft is composed of a motor, a pump body connected to said motor via pump shaft, a long-handle impeller with a central connecting hole for inserting one end of said connecting shaft sleeve, a long-handle axle head with a central connecting hole, a transition connecting axle sleeve between the end of pump shaft and the axle head of motor, and a bearing frame consisting of a base body, a bearing on said base body, a bearing in said bearing and a bearing gland, and a bearing cover on said transition connecting axle sleeve, the motor mounting disc is fixedly mounted with the connecting bracket.
CN202210064830.5A 2022-01-20 2022-01-20 Coupling mechanism capable of preventing axial movement and centrifugal pump thereof Pending CN114412822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210064830.5A CN114412822A (en) 2022-01-20 2022-01-20 Coupling mechanism capable of preventing axial movement and centrifugal pump thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210064830.5A CN114412822A (en) 2022-01-20 2022-01-20 Coupling mechanism capable of preventing axial movement and centrifugal pump thereof

Publications (1)

Publication Number Publication Date
CN114412822A true CN114412822A (en) 2022-04-29

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Country Link
CN (1) CN114412822A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101509521A (en) * 2009-03-19 2009-08-19 日立泵制造（无锡）有限公司 Improved vertical water pump coupler
CN105570182A (en) * 2015-12-10 2016-05-11 安徽凯特泵业有限公司 Connecting structure of pump shaft and motor of submerged pump
CN112324699A (en) * 2020-11-22 2021-02-05 宜兴市宙斯泵业有限公司 Slurry vertical centrifugal pump
CN112324701A (en) * 2020-11-22 2021-02-05 宜兴市宙斯泵业有限公司 Corrosion-resistant high-pressure vertical centrifugal pump
CN215444414U (en) * 2021-07-19 2022-01-07 开利泵业集团上海有限公司 Convenient to detach type centrifugal pump with water drainage tank

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101509521A (en) * 2009-03-19 2009-08-19 日立泵制造（无锡）有限公司 Improved vertical water pump coupler
CN105570182A (en) * 2015-12-10 2016-05-11 安徽凯特泵业有限公司 Connecting structure of pump shaft and motor of submerged pump
CN112324699A (en) * 2020-11-22 2021-02-05 宜兴市宙斯泵业有限公司 Slurry vertical centrifugal pump
CN112324701A (en) * 2020-11-22 2021-02-05 宜兴市宙斯泵业有限公司 Corrosion-resistant high-pressure vertical centrifugal pump
CN215444414U (en) * 2021-07-19 2022-01-07 开利泵业集团上海有限公司 Convenient to detach type centrifugal pump with water drainage tank

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
北京轴承研究所: "简明滚动轴承手册", 31 December 1984, 中国农业机械出版社, pages: 41 *

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