CN110145472B - Impeller and volute gap measuring device - Google Patents
Impeller and volute gap measuring device Download PDFInfo
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- CN110145472B CN110145472B CN201910487300.XA CN201910487300A CN110145472B CN 110145472 B CN110145472 B CN 110145472B CN 201910487300 A CN201910487300 A CN 201910487300A CN 110145472 B CN110145472 B CN 110145472B
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- impeller
- volute
- tip cone
- clearance
- tested
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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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a device for measuring the clearance between an impeller and a volute, relates to visual measurement of the clearance between the impeller and the volute, and belongs to the technical field of engine measurement. The spiral-casing impeller comprises an impeller base, a spiral-casing tip cone, an impeller tip cone, a straight-groove hexagon head screw and a bracket; the support, the volute tip cone and the impeller tip cone are connected through a straight-groove hexagonal head screw, and the lower end face of the support is tightly attached to the end face of the impeller base and is connected with the impeller base; placing the tested volute and the tested impeller and then starting to measure; the measured value is the clearance between the impeller and the volute. The invention has simple, compact and reasonable structure; due to the adoption of the step-by-step indirect measurement method, the mutual conversion between the sizes which can be directly measured can be realized through the cooperation of the measurement tools in the assembling process of the centrifugal pump, so that the clearance value between the impeller and the volute after the assembly is obtained.
Description
Technical Field
The invention discloses a device for measuring the clearance between an impeller and a volute, relates to visual measurement of the clearance between the impeller and the volute, and belongs to the technical field of engine measurement.
Background
The presence of the impeller-volute gap is a major cause of leakage losses in centrifugal pumps. The overlarge gap can cause the liquid after the impeller does work to return to the inlet of the pump, and the liquid is converged with the liquid from the inlet pipeline and then enters the impeller to form repeated work, so that the hydraulic efficiency and the volumetric efficiency of the pump are influenced; and too small clearance can cause collision and friction between the pump volute and the impeller, so that the pump body is damaged. And for the centrifugal pump as a whole, after the assembly is finished, the size of the clearance between the impeller and the volute cannot be directly measured.
In summary, the clearance between the impeller and the volute has great significance on the performance of the centrifugal pump, and the existence of the clearance not only causes volume loss of the centrifugal pump, but also changes the flow condition inside the centrifugal pump. For which a measuring method is developed.
Disclosure of Invention
The invention aims to overcome the defects and provides the device for measuring the clearance between the impeller and the volute, which can directly measure the mutual conversion between the sizes through the matching of the measuring tools in the process of assembling the centrifugal pump, thereby obtaining the clearance value between the impeller and the volute after the assembly is finished.
According to the technical scheme provided by the invention, the device for measuring the clearance between the impeller and the volute comprises
The device comprises an impeller base, a volute tip cone, an impeller tip cone, a straight-groove hexagon head screw and a bracket; the support, the volute tip cone and the impeller tip cone are connected through a straight-groove hexagonal head screw, and the lower end face of the support is tightly attached to the end face of the impeller base and is connected with the impeller base; placing the tested volute and the tested impeller and then starting to measure; the measured value is the clearance between the impeller and the volute.
As a further improvement of the invention, the conicity and the conical surface form and position tolerance of the volute tip cone and the impeller tip cone are consistent with the conicity of the tested volute and the tested impeller.
The invention has the following advantages: the invention has simple, compact and reasonable structure; due to the adoption of the step-by-step indirect measurement method, the mutual conversion between the sizes which can be directly measured can be realized through the cooperation of the measurement tools in the assembling process of the centrifugal pump, so that the clearance value between the impeller and the volute after the assembly is obtained.
Drawings
Fig. 1 is a schematic structural diagram of the measurement of the clearance between the impeller and the volute of the invention.
FIG. 2 is a schematic representation of the impeller to volute clearance measurement of the present invention.
Fig. 3 is an enlarged view of section I of fig. 1.
Description of reference numerals: the device comprises a volute to be tested 1, an impeller to be tested 2, an impeller base 3, a volute tip cone 4, an impeller tip cone 5, a linear groove hexagon head screw 6 and a support 7.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1-3: a device for measuring the clearance between an impeller and a volute comprises an impeller base 3, a volute tip cone 4, an impeller tip cone 5, a linear groove hexagon head screw 6 and a support 7; the support 7, the volute tip cone 4 and the impeller tip cone 5 are connected through a straight groove hexagonal head screw 6, and the lower end face of the support 7 is tightly attached to the end face of the impeller base 3 and is connected with the impeller base 3.
The conicity and the conical surface form and position tolerance of the volute tip cone 4 and the impeller tip cone 5 are completely consistent with the conicity of the tested volute and impeller in the processing process; the size of the hole of the bracket 7 matched with the tested volute and the impeller base is processed according to the H7/f9 tolerance zone.
When the method is used for measuring the content of the liquid,
the tested volute 1 is inverted, the volute tip cone 4 is arranged in the support 7, the end face of the support 7 is tightly attached to the end face of the tested volute 1, the conical surface of the volute tip cone 4 is tightly attached to the conical surface of the tested volute 1 under the action of gravity, and the volute tip cone 4 and the support 7 are locked by the straight-groove hexagonal head screw 6. The impeller tip cone 5 is arranged in the volute tip cone 4, the tested volute 1 is removed, the volute tip cone 4, the impeller tip cone 5, the linear groove hexagonal head screw 6 and the support 7 are rotated, the lower end face of the support 7 is tightly attached to the end face of the impeller base 3, the conical face of the impeller tip cone 5 is tightly attached to the conical face of the tested impeller 2 under the action of gravity, and the linear groove hexagonal head screw 6 is used for locking the impeller tip cone 5 and the support 7. And measuring and recording the value, wherein the measured value is the clearance between the impeller and the volute.
The main principle of the invention is as follows:
through the cooperation of measuring the frock, carry out the interconversion that can directly measure between the size to reachd the impeller and the spiral case clearance value after the assembly is accomplished.
Claims (1)
1. A device for measuring the clearance between an impeller and a volute is characterized in that: comprises an impeller base (3), a volute tip cone (4), an impeller tip cone (5), a straight-groove hexagonal-head screw (6) and a bracket (7); the support (7), the volute tip cone (4) and the impeller tip cone (5) are connected through a straight groove hexagonal head screw (6), and the lower end face of the support (7) is tightly attached to the end face of the impeller base (3) and is connected with the impeller base (3); the measured volute (1) and the measured impeller (2) are placed and then measurement is started; the conicity and the conical surface form and position tolerance of the volute tip cone (4) and the impeller tip cone (5) are consistent with the conicity of the tested volute (1) and the tested impeller (2); and measuring and recording a value by measuring the height difference of the volute tip cone (4) and the impeller tip cone (5), wherein the obtained value is the clearance between the impeller and the volute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910487300.XA CN110145472B (en) | 2019-06-05 | 2019-06-05 | Impeller and volute gap measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910487300.XA CN110145472B (en) | 2019-06-05 | 2019-06-05 | Impeller and volute gap measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110145472A CN110145472A (en) | 2019-08-20 |
| CN110145472B true CN110145472B (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910487300.XA Active CN110145472B (en) | 2019-06-05 | 2019-06-05 | Impeller and volute gap measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110145472B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074611B (en) * | 2021-03-29 | 2023-08-29 | 势加透博洁净动力如皋有限公司 | Air compressor machine leaf top clearance measurement frock |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206593576U (en) * | 2016-12-27 | 2017-10-27 | 上海连成（集团）有限公司 | A kind of constant pressure pump pump housing and the measurement structure of impeller fit-up gap |
| CN207395621U (en) * | 2017-10-30 | 2018-05-22 | 中科航星科技有限公司 | For detecting the measuring device of impeller and inlet casing gap |
| CN208860334U (en) * | 2018-10-22 | 2019-05-14 | 浙江荣发动力有限公司 | Booster gap detection device |
| CN109357595B (en) * | 2018-12-07 | 2020-07-21 | 中国航发南方工业有限公司 | Method for measuring axial clearance between centrifugal impeller and impeller housing |
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2019
- 2019-06-05 CN CN201910487300.XA patent/CN110145472B/en active Active
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| Publication number | Publication date |
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| CN110145472A (en) | 2019-08-20 |
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