CN109404050B - Structure for reducing stress concentration of central hole of impeller part - Google Patents
Structure for reducing stress concentration of central hole of impeller part Download PDFInfo
- Publication number
- CN109404050B CN109404050B CN201811548454.7A CN201811548454A CN109404050B CN 109404050 B CN109404050 B CN 109404050B CN 201811548454 A CN201811548454 A CN 201811548454A CN 109404050 B CN109404050 B CN 109404050B
- Authority
- CN
- China
- Prior art keywords
- boss
- impeller
- stress
- face
- shaft
- 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.)
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Links
- 239000013585 weight reducing agent Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 description 6
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
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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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a structure for reducing stress concentration of a central hole of an impeller part, which comprises an impeller, a shaft and a locking nut, wherein a positioning boss is arranged on the lower end face of the impeller, the positioning boss is coaxially arranged with the impeller, a weight reduction groove is formed in the axial direction of the upper end face of the impeller, a stress boss is arranged on the bottom face of the weight reduction groove, the stress boss and the positioning boss are coaxially arranged, a fixing hole is formed in the axial direction of the stress boss, and the lower end of the fixing hole penetrates through the positioning boss; the upper end face of the stress boss is of a planar structure, the top end of the shaft penetrates through the fixing hole and extends into the weight reduction groove, the locking nut is in threaded connection with the top end of the shaft, and the lower end face of the locking nut abuts against the upper end face of the stress boss. The invention reduces the stress concentration phenomenon at the central hole and the stress peak value at the central hole of the impeller while ensuring the strength of the impeller.
Description
Technical field:
The invention relates to a structure for reducing stress concentration of a central hole of an impeller part.
The background technology is as follows:
Some larger impellers will remove the mass from the center to reduce the mass of the impeller itself. The impeller bottom surface is matched with a lock nut to be fixed with the rotating shaft. Removing the mass reduces the mass of the impeller, but the central hole in the bottom is subject to significant stress concentrations. And because impeller material is mostly the material that relative strength such as aluminum alloy is less, and the centre bore position is the locking terminal surface of nut again, and the material near this place can be destroyed over time.
After the material is removed from the center of the impeller, the lock nut stretches into the impeller and is locked on the end face of the bottom. The mating surface of this form of impeller and shaft is generally not a central bore, as if a central bore is used as a radial location, it is difficult to ensure the centering requirements of the impeller at high speed operation. While for impellers of this construction, higher stresses will be created near the inner bore and at the hub and disk, the former due to stress concentration phenomena, the latter being created by the hub centrifugally deforming "pulling" the disk edge.
The invention comprises the following steps:
The invention aims to solve the problems in the prior art and provides a structure for reducing stress concentration of a central hole of an impeller part.
The invention adopts the technical scheme that: the structure for reducing stress concentration of a central hole of an impeller part comprises an impeller, a shaft and a lock nut, wherein a positioning boss is arranged on the lower end face of the impeller, the positioning boss is coaxially arranged with the impeller, a weight reduction groove is formed in the axial direction of the upper end face of the impeller, a stress boss is arranged on the bottom face of the weight reduction groove, the stress boss and the positioning boss are coaxially arranged, a fixing hole is formed in the axial direction of the stress boss, and the lower end of the fixing hole penetrates through the positioning boss; the upper end face of the stress boss is of a planar structure, the top end of the shaft penetrates through the fixing hole and extends into the weight reduction groove, the locking nut is in threaded connection with the top end of the shaft, and the lower end face of the locking nut abuts against the upper end face of the stress boss.
Further, the outer wall surface of the stress boss is of a conical surface structure, and the diameter of the top of the stress boss is smaller than that of the bottom of the stress boss.
Further, a positioning groove is formed in the top end of the shaft, and the positioning boss extends into the positioning groove.
Further, the bottom surface corner of the weight reduction groove is of an arc surface structure.
The invention has the following beneficial effects: the invention reduces the stress concentration phenomenon at the central hole and the stress peak value at the central hole of the impeller while ensuring the strength of the impeller.
Description of the drawings:
fig. 1 is a structural diagram of the present invention.
The specific embodiment is as follows:
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the structure for reducing stress concentration of a central hole of an impeller part comprises an impeller 1, a shaft 2 and a lock nut 3, wherein a positioning boss 11 is arranged on the lower end face of the impeller 1, the positioning boss 11 is coaxially arranged with the impeller 1, a weight reducing groove 10 is formed in the axial direction of the upper end face of the impeller 1, a stress boss 12 is arranged on the bottom face of the weight reducing groove 10, the stress boss 12 is coaxially arranged with the positioning boss 11, a fixing hole 13 is formed in the axial direction of the stress boss 12, and the lower end of the fixing hole 13 penetrates through the positioning boss 11. The upper end face of the stress boss 12 is of a planar structure, the top end of the shaft 2 passes through the fixing hole 13 and extends into the weight reduction groove 10, the lock nut 3 is in threaded connection with the top end of the shaft 2, and the lower end face of the lock nut 3 abuts against the upper end face of the stress boss 12.
The outer wall surface of the stress boss 12 is of an outwards inclined conical surface structure, and the diameter of the top of the stress boss 12 is smaller than that of the bottom of the stress boss 12.
The top end of the shaft 2 is provided with a positioning groove, and a positioning boss 11 extends into the positioning groove.
The bottom corner of the weight reducing groove 10 is in an arc surface structure.
The invention further removes material near the locking end face, thus reducing stress concentration at the central hole (fixing hole 13) while ensuring adequate fit of the locking end face (in a manner that is convenient to understand, it is believed that "pulling" of the wheel hub against the wheel disc will create tension on the wheel disc that will concentrate at the central hole with the wheel disc flat, and that the stress distribution on the wheel disc will change once the material at the central hole is removed). The structure reduces the stress of the central hole, has small influence on the strength of the joint of the hub and the wheel disc, and the influence degree is completely within the safety margin.
The invention reduces the stress concentration phenomenon at the central hole and the stress peak value at the central hole of the impeller while ensuring the strength of the impeller.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.
Claims (2)
1. The utility model provides a reduce structure of impeller part centre bore stress concentration which characterized in that: the novel high-speed centrifugal impeller comprises an impeller (1), a shaft (2) and a lock nut (3), wherein a positioning boss (11) is arranged on the lower end face of the impeller (1), the positioning boss (11) and the impeller (1) are coaxially arranged, a weight reducing groove (10) is formed in the axial direction of the upper end face of the impeller (1), a stress boss (12) is arranged on the bottom face of the weight reducing groove (10), the stress boss (12) and the positioning boss (11) are coaxially arranged, a fixing hole (13) is formed in the axial direction of the stress boss (12), and the lower end of the fixing hole (13) penetrates through the positioning boss (11); the upper end face of the stress boss (12) is of a planar structure, the top end of the shaft (2) passes through the fixing hole (13) and extends into the weight reduction groove (10), the locking nut (3) is in threaded connection with the top end of the shaft (2), and the lower end face of the locking nut (3) is abutted against the upper end face of the stress boss (12);
The outer wall surface of the stress boss (12) is of a conical surface structure, and the top diameter of the stress boss (12) is smaller than the bottom diameter of the stress boss (12);
The bottom surface corner of the weight reduction groove (10) is of an arc surface structure.
2. The structure for reducing stress concentration in a center hole of an impeller component according to claim 1, wherein: the top end of the shaft (2) is provided with a positioning groove, and a positioning boss (11) extends into the positioning groove.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548454.7A CN109404050B (en) | 2018-12-18 | 2018-12-18 | Structure for reducing stress concentration of central hole of impeller part |
| PCT/CN2019/106740 WO2020125102A1 (en) | 2018-12-18 | 2019-09-19 | Structure for reducing stress concentration of central hole of impeller part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548454.7A CN109404050B (en) | 2018-12-18 | 2018-12-18 | Structure for reducing stress concentration of central hole of impeller part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109404050A CN109404050A (en) | 2019-03-01 |
| CN109404050B true CN109404050B (en) | 2024-05-28 |
Family
ID=65460690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811548454.7A Active CN109404050B (en) | 2018-12-18 | 2018-12-18 | Structure for reducing stress concentration of central hole of impeller part |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109404050B (en) |
| WO (1) | WO2020125102A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404050B (en) * | 2018-12-18 | 2024-05-28 | 南京磁谷科技股份有限公司 | Structure for reducing stress concentration of central hole of impeller part |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202867328U (en) * | 2012-07-20 | 2013-04-10 | 湖北省风机厂有限公司 | Automatic locking device for impeller of high-speed rotor |
| CN103362864A (en) * | 2013-08-02 | 2013-10-23 | 无锡杰尔压缩机有限公司 | Weight reduction mechanism of unshrouded impeller |
| DE102014203840A1 (en) * | 2014-03-03 | 2015-09-03 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Rotor for an exhaust gas turbocharger |
| CN105570198A (en) * | 2016-02-05 | 2016-05-11 | 广州市昕恒泵业制造有限公司 | Pump structure |
| CN106593941A (en) * | 2016-11-29 | 2017-04-26 | 东方电气集团东方汽轮机有限公司 | Rotor pump wheel installation positioning structure |
| CN206559193U (en) * | 2016-12-19 | 2017-10-13 | 南京磁谷科技有限公司 | A kind of magnetic suspension motor impeller of rotor quick despatch structure |
| CN107435655A (en) * | 2016-05-29 | 2017-12-05 | 襄阳新金开泵业有限公司 | A kind of impeller of chemical centrifugal pump locking device |
| CN107643173A (en) * | 2017-10-30 | 2018-01-30 | 南京磁谷科技有限公司 | The mounting structure of impeller in a kind of overspeed test bench |
| CN208089558U (en) * | 2018-03-28 | 2018-11-13 | 山东省章丘鼓风机股份有限公司 | A kind of breakage-proof ceramic slag and stuff pump impeller |
| CN209340003U (en) * | 2018-12-18 | 2019-09-03 | 南京磁谷科技有限公司 | A kind of structure for reducing Impeller Parts centre bore stress and concentrating |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5457621B2 (en) * | 2006-10-12 | 2014-04-02 | 株式会社日立産機システム | Multi-blade impeller |
| CN109404050B (en) * | 2018-12-18 | 2024-05-28 | 南京磁谷科技股份有限公司 | Structure for reducing stress concentration of central hole of impeller part |
-
2018
- 2018-12-18 CN CN201811548454.7A patent/CN109404050B/en active Active
-
2019
- 2019-09-19 WO PCT/CN2019/106740 patent/WO2020125102A1/en active Application Filing
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202867328U (en) * | 2012-07-20 | 2013-04-10 | 湖北省风机厂有限公司 | Automatic locking device for impeller of high-speed rotor |
| CN103362864A (en) * | 2013-08-02 | 2013-10-23 | 无锡杰尔压缩机有限公司 | Weight reduction mechanism of unshrouded impeller |
| DE102014203840A1 (en) * | 2014-03-03 | 2015-09-03 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Rotor for an exhaust gas turbocharger |
| CN105570198A (en) * | 2016-02-05 | 2016-05-11 | 广州市昕恒泵业制造有限公司 | Pump structure |
| CN107435655A (en) * | 2016-05-29 | 2017-12-05 | 襄阳新金开泵业有限公司 | A kind of impeller of chemical centrifugal pump locking device |
| CN106593941A (en) * | 2016-11-29 | 2017-04-26 | 东方电气集团东方汽轮机有限公司 | Rotor pump wheel installation positioning structure |
| CN206559193U (en) * | 2016-12-19 | 2017-10-13 | 南京磁谷科技有限公司 | A kind of magnetic suspension motor impeller of rotor quick despatch structure |
| CN107643173A (en) * | 2017-10-30 | 2018-01-30 | 南京磁谷科技有限公司 | The mounting structure of impeller in a kind of overspeed test bench |
| CN208089558U (en) * | 2018-03-28 | 2018-11-13 | 山东省章丘鼓风机股份有限公司 | A kind of breakage-proof ceramic slag and stuff pump impeller |
| CN209340003U (en) * | 2018-12-18 | 2019-09-03 | 南京磁谷科技有限公司 | A kind of structure for reducing Impeller Parts centre bore stress and concentrating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109404050A (en) | 2019-03-01 |
| WO2020125102A1 (en) | 2020-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: No. 99 Jinxin Middle Road, Jiangning Development Zone, Nanjing City, Jiangsu Province, 211102 Applicant after: Nanjing Cigu Technology Co.,Ltd. Address before: 211102 No. 100 Jiuzhu Road, Jiangning Development Zone, Nanjing, Jiangsu Province Applicant before: NANJING CIGU Ltd.,Corp. Country or region before: China |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |