CN112483460A - Axial flow pump impeller structure for preventing transmission shaft from reversing - Google Patents

Axial flow pump impeller structure for preventing transmission shaft from reversing Download PDF

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Publication number
CN112483460A
CN112483460A CN202011348784.9A CN202011348784A CN112483460A CN 112483460 A CN112483460 A CN 112483460A CN 202011348784 A CN202011348784 A CN 202011348784A CN 112483460 A CN112483460 A CN 112483460A
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CN
China
Prior art keywords
transmission shaft
impeller
flow pump
axial flow
preventing
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
CN202011348784.9A
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Chinese (zh)
Inventor
焦海峰
陈松山
秦钟建
朱亚东
周正富
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Yangzhou University
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Yangzhou University
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Filing date
Publication date
Application filed by Yangzhou University filed Critical Yangzhou University
Priority to CN202011348784.9A priority Critical patent/CN112483460A/en
Publication of CN112483460A publication Critical patent/CN112483460A/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
    • F04D29/18—Rotors
    • F04D29/181—Axial flow rotors
    • 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
    • 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
    • F04D29/046—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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/648—Mounting; Assembling; Disassembling of axial pumps especially adapted for liquid pumps

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

Abstract

An impeller structure of an axial flow pump for preventing a transmission shaft from reversing belongs to the technical field of hydraulic engineering equipment and is formed by connecting a water guide cone, an impeller hub, blades, the transmission shaft, a guide vane and a bearing, wherein the impeller hub and the transmission shaft are supported by a rolling bearing, and a metal key is connected between the hub and the rolling bearing to transmit torque; the impeller structure of the axial flow pump effectively avoids the active reverse rotation of the impeller caused by the reverse rotation of the motor, protects the safe operation of a unit and improves the integral stability of the pump device during working.

Description

Axial flow pump impeller structure for preventing transmission shaft from reversing
Technical Field
The invention belongs to the technical field of hydraulic engineering equipment, relates to an axial flow pump impeller structure, and particularly relates to an axial flow pump impeller structure for preventing a transmission shaft from reversing.
Background
In the normal working process of the axial-flow pump, the motor drives the impeller to rotate forward through the bearing to generate lift force, so that water flow is pushed to flow, and the aim of improving a water head is fulfilled. However, in the actual operation process of the water pump motor, the stator and the rotor are seriously abraded, the phases are lost, the circuit is not aged and the contact is poor, the circuit is reversely connected and the like, and the motor reversely rotates and simultaneously drives the impeller to actively rotate, so that the phenomena of serious damage to the water pump unit, such as loosening of the back cap of the impeller, loosening of the nut, even shaft release of the impeller, deformation and fracture of the transmission shaft and the like are caused, and great economic loss is caused. The existing device for preventing the impeller of the water pump from reversing is mainly matched with a friction wheel through an eccentric block, has more using limitation conditions, can only be used for a small submersible pump, is difficult to install and is not beneficial to later-stage operation and maintenance; aiming at a large axial flow pump, the existing anti-inversion device has insufficient use stability. Therefore, a structure capable of preventing the impeller of the axial flow pump from actively reversing is designed, and the structure is particularly important for improving the safety and the operation stability of a water pump unit.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an axial flow pump impeller structure for preventing a transmission shaft from reversely rotating, which can avoid the active reverse rotation of an impeller caused by the reverse rotation of a motor, protect the safe operation of a unit and improve the overall stability of a pump device during working.
The technical scheme of the invention is as follows: the utility model provides a prevent axial-flow pump impeller structure of transmission shaft reversal which characterized in that: the axial flow pump impeller structure is formed by connecting a water guide cone, an impeller hub, blades, a transmission shaft, guide vanes and a bearing; blade and stator connect gradually to be fixed on impeller wheel hub's the outer wall, be equipped with a plurality of mounting grooves on impeller wheel hub's the inner wall, the fixed interior locating pin that is equipped with of tank bottom surface of mounting groove, the fixed round pin axle that is equipped with on the lateral wall of mounting groove, it is equipped with the check piece to sell epaxial cover, the check piece rotates around the round pin axle, the fixed outer locating pin that is equipped with on the medial surface of check piece, it is equipped with the spring to connect between interior locating pin and the outer locating pin, be equipped with the round sawtooth on the outer circumference of transmission shaft, the both sides of sawtooth are equipped with left bearing and right bearing, the transmission shaft passes through left bearing and right bearing rotate to be connected impeller wheel hub's inside, the tight setting in top under the effort of spring.
The quantity of mounting groove is 6, and the mounting groove equipartition sets up on impeller wheel hub's inner wall.
The spring is a compression type spring, one end of the spring is fixedly connected with the outer positioning pin, and the other end of the spring is fixedly connected with the inner positioning pin.
The number of teeth of sawtooth is 6, evenly sets up on the excircle of transmission shaft, and the tooth top height and the tooth width homogeneous phase of every sawtooth are less than the groove width of mounting groove.
Inner rings of the left bearing and the right bearing are in interference fit with an outer circle of the transmission shaft, key grooves are formed in outer rings of the left bearing and the right bearing, keys are arranged in the key grooves, and the outer rings of the bearings are circumferentially fixed with the impeller hub through the keys.
And a gap is formed between the addendum circle of the transmission shaft and the inner diameter of the impeller hub, and the gap value in the diameter direction is not more than 0.3 mm.
The inner positioning pin is welded and fixed at the bottom of the mounting groove, the outer positioning pin is welded and fixed on the inner side face of the check sheet, the two positioning pins are coaxially arranged, and the two positioning pins and the spring form interference fit connection.
The width of the check sheet is equal to the tooth width of the saw teeth, and the length of the check sheet is smaller than the arc length of the opening of the mounting groove.
The invention has the beneficial effects that: the invention provides an axial flow pump impeller structure for preventing a transmission shaft from reversing, which is formed by connecting a water guide cone, an impeller hub, blades, the transmission shaft, a guide vane and a bearing, wherein the impeller hub and the transmission shaft are supported by adopting a rolling bearing, and the hub and the rolling bearing are connected by a metal key to transmit torque; the impeller structure of the axial flow pump effectively avoids the active reverse rotation of the impeller caused by the reverse rotation of the motor, protects the safe operation of a unit and improves the integral stability of the pump device during working.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic sectional view at a-a in fig. 1.
Fig. 3 is a schematic sectional view of an impeller hub according to the present invention.
Fig. 4 is a schematic sectional view of a propeller shaft according to the present invention.
Fig. 5 is a front view schematically illustrating a structure of a bearing according to the present invention.
In the figure: the water guide cone comprises a water guide cone 1, a left bearing 2, a key 3, an impeller hub 4, blades 5, a spring 6, a check sheet 7, a transmission shaft 8, a guide vane 9, a right bearing 10, an outer positioning pin 11, an inner positioning pin 12, a pin shaft 13, an installation groove 14, sawteeth 15 and a key groove 16.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1-5, an axial flow pump impeller structure for preventing a transmission shaft from reversing comprises a water guide cone 1, an impeller hub 4, blades 5, a transmission shaft 8, a guide vane 9 and a bearing which are connected; blade 5 and stator 9 connect gradually to be fixed on impeller wheel hub 4's outer wall, be equipped with a plurality of mounting grooves 14 on impeller wheel hub 4's the inner wall, the fixed interior locating pin 12 that is equipped with of tank bottom surface of mounting groove 14, the fixed round pin axle 13 that is equipped with on mounting groove 14's the lateral wall, the cover is equipped with check piece 7 on the round pin axle 13, check piece 7 rotates around round pin axle 13, fixed outer locating pin 11 that is equipped with on the medial surface of check piece 7, it is equipped with spring 6 to connect between interior locating pin 12 and the outer locating pin 11, be equipped with round sawtooth 15 on the outer circumference of transmission shaft 8, the both sides of sawtooth 15 are equipped with left bearing 2 and right bearing 10, transmission shaft 8 rotates through left bearing 2 and right bearing 10 and connects the inside at impeller wheel hub 4, check.
As shown in fig. 1-5, in an impeller structure of an axial flow pump for preventing a transmission shaft from rotating reversely, the number of mounting grooves 14 is 6, and the mounting grooves 14 are uniformly distributed on the inner wall of an impeller hub 4; the spring 6 is a compression type spring, one end of the spring 6 is fixedly connected with the outer positioning pin 11, and the other end of the spring 6 is fixedly connected with the inner positioning pin 12; the number of the teeth of the saw teeth 15 is 6, the teeth are uniformly arranged on the excircle of the transmission shaft 8, the tooth top height and the tooth width of each saw tooth 15 are the same, and the tooth width of each saw tooth 15 is smaller than the groove width of the mounting groove 14; inner rings of the left bearing 2 and the right bearing 10 are in interference fit with an outer circle of the transmission shaft 8, key grooves 16 are formed in outer rings of the left bearing 2 and the right bearing 10, keys 3 are arranged in the key grooves 16, and the outer rings of the bearings are circumferentially fixed with the impeller hub 4 through the keys 3; a clearance is arranged between the addendum circle of the transmission shaft 8 and the inner diameter of the impeller hub 4, and the clearance value in the diameter direction is not more than 0.3 mm; the inner positioning pin 12 is fixedly welded at the bottom of the mounting groove 14, the outer positioning pin 11 is fixedly welded at the inner side surface of the check sheet 7, the two positioning pins are coaxially arranged, and the two positioning pins and the spring 6 are in interference fit connection; the width of the check sheet 7 is equal to the tooth width of the sawteeth 15, and the length of the check sheet 7 is smaller than the opening arc length of the mounting groove 14.
As shown in fig. 1-5, an impeller structure of an axial flow pump for preventing the reverse rotation of a drive shaft works according to the following principle: the impeller hub is supported on the transmission shaft through rolling bearings on two sides, the impeller hub and the transmission shaft are supported by the rolling bearings, and the hub and the rolling bearings are connected through a metal key to transmit torque; the impeller structure of the axial flow pump effectively avoids the active reversal of the impeller caused by the reversal of the motor, protects the safe operation of a unit and improves the integral stability of a pump device during working.

Claims (8)

1. The utility model provides a prevent axial-flow pump impeller structure of transmission shaft reversal which characterized in that: the axial flow pump impeller structure is formed by connecting a water guide cone (1), an impeller hub (4), blades (5), a transmission shaft (8), a guide vane (9) and a bearing; blade (5) and stator (9) connect gradually to be fixed on impeller wheel hub (4)'s outer wall, be equipped with a plurality of mounting grooves (14) on impeller wheel hub (4)'s the inner wall, the fixed interior locating pin (12) that is equipped with of tank bottom surface of mounting groove (14), fixed round pin axle (13) that is equipped with on the lateral wall of mounting groove (14), the cover is equipped with on round pin axle (13) and stops piece (7), it rotates around round pin axle (13) to stop piece (7), the fixed outer locating pin (11) that is equipped with on the medial surface of stopping piece (7), it is equipped with spring (6) to connect between interior locating pin (12) and outer locating pin (11), be equipped with round sawtooth (15) on the outer circumference of transmission shaft (8), the both sides of sawtooth (15) are equipped with left bearing (2) and right bearing (10), transmission shaft (8) pass through left bearing (2) and right bearing (10) rotate to be connected in impeller wheel hub's (4), the check sheet (7) is tightly propped against the sawteeth (15) under the action of a spring.
2. The impeller structure of an axial flow pump for preventing the reverse rotation of a transmission shaft according to claim 1, wherein: the quantity of mounting groove (14) is 6, and mounting groove (14) equipartition sets up on impeller wheel hub's (4) inner wall.
3. The impeller structure of an axial flow pump for preventing the reverse rotation of a transmission shaft according to claim 1, wherein: the spring (6) is a compression spring, one end of the spring (6) is fixedly connected with the outer positioning pin (11), and the other end of the spring is fixedly connected with the inner positioning pin (12).
4. The impeller structure of an axial flow pump for preventing the reverse rotation of a transmission shaft according to claim 1, wherein: the number of teeth of sawtooth (15) is 6, evenly sets up on the excircle of transmission shaft (8), and the tooth top height and the tooth width of every sawtooth (15) are all the same, and the tooth width of sawtooth (15) is less than the groove width of mounting groove (14).
5. The impeller structure of an axial flow pump for preventing the reverse rotation of a transmission shaft according to claim 1, wherein: the inner rings of the left bearing (2) and the right bearing (10) form interference fit with the outer circle of the transmission shaft (8), key grooves (16) are formed in the outer rings of the left bearing (2) and the right bearing (10), keys (3) are arranged in the key grooves (16), and the outer rings of the bearings are circumferentially fixed with the impeller hub (4) through the keys (3).
6. The impeller structure of an axial flow pump for preventing the reverse rotation of a transmission shaft according to claim 1, wherein: and a gap is formed between the addendum circle of the transmission shaft (8) and the inner diameter of the impeller hub (4), and the gap value in the diameter direction is not more than 0.3 mm.
7. The impeller structure of an axial flow pump for preventing the reverse rotation of a transmission shaft according to claim 1, wherein: the inner positioning pin (12) is welded and fixed at the bottom of the mounting groove (14), the outer positioning pin (11) is welded and fixed on the inner side surface of the check sheet (7), the two positioning pins are coaxially arranged, and the two positioning pins and the spring (6) form interference fit connection.
8. The impeller structure of an axial flow pump for preventing the reverse rotation of a transmission shaft according to claim 1, wherein: the width of the check sheet (7) is equal to the tooth width of the sawteeth (15), and the length of the check sheet (7) is smaller than the opening arc length of the mounting groove (14).
CN202011348784.9A 2020-11-26 2020-11-26 Axial flow pump impeller structure for preventing transmission shaft from reversing Pending CN112483460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011348784.9A CN112483460A (en) 2020-11-26 2020-11-26 Axial flow pump impeller structure for preventing transmission shaft from reversing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011348784.9A CN112483460A (en) 2020-11-26 2020-11-26 Axial flow pump impeller structure for preventing transmission shaft from reversing

Publications (1)

Publication Number Publication Date
CN112483460A true CN112483460A (en) 2021-03-12

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CN202011348784.9A Pending CN112483460A (en) 2020-11-26 2020-11-26 Axial flow pump impeller structure for preventing transmission shaft from reversing

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2202473A5 (en) * 1972-10-06 1974-05-03 Walther Bueromasch Gmbh
EP0145644A2 (en) * 1983-12-06 1985-06-19 RUD-Kettenfabrik Rieger & Dietz GmbH u. Co. Device for tensioning lines, especially chains or belts
CN107299874A (en) * 2016-12-14 2017-10-27 江苏国泉泵业制造有限公司 A kind of axial flow pump hydraulic turbine with double-clutch mechanism
CN207792321U (en) * 2017-12-22 2018-08-31 重庆华旗线缆有限公司 A kind of cable take-up
CN210240027U (en) * 2019-07-02 2020-04-03 安徽正元机械有限公司 Planetary gear speed reduction submersible electric pump
CN211709895U (en) * 2019-12-10 2020-10-20 苏州宏昌达塑业有限公司 Grass trimmer casing forming structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2202473A5 (en) * 1972-10-06 1974-05-03 Walther Bueromasch Gmbh
EP0145644A2 (en) * 1983-12-06 1985-06-19 RUD-Kettenfabrik Rieger & Dietz GmbH u. Co. Device for tensioning lines, especially chains or belts
CN107299874A (en) * 2016-12-14 2017-10-27 江苏国泉泵业制造有限公司 A kind of axial flow pump hydraulic turbine with double-clutch mechanism
CN207792321U (en) * 2017-12-22 2018-08-31 重庆华旗线缆有限公司 A kind of cable take-up
CN210240027U (en) * 2019-07-02 2020-04-03 安徽正元机械有限公司 Planetary gear speed reduction submersible electric pump
CN211709895U (en) * 2019-12-10 2020-10-20 苏州宏昌达塑业有限公司 Grass trimmer casing forming structure

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Application publication date: 20210312