CN104141618B - The decoupling zero testing apparatus of centrifugal pump - Google Patents
The decoupling zero testing apparatus of centrifugal pump Download PDFInfo
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- CN104141618B CN104141618B CN201410410605.8A CN201410410605A CN104141618B CN 104141618 B CN104141618 B CN 104141618B CN 201410410605 A CN201410410605 A CN 201410410605A CN 104141618 B CN104141618 B CN 104141618B
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Abstract
The present invention relates to a kind of decoupling zero testing apparatus of centrifugal pump, the spiral case of centrifugal pump is by being separated decoupling zero support installing on spiral case supporting base, vane rotor is arranged on the motor shaft of the drive motor of centrifugal pump, the drive motor of centrifugal pump is arranged on motor support pedestal, and spiral case supporting base and motor support pedestal separate, make physical separation between spiral case and drive motor rotor, realize the vibration uncoupling of fluid excitation, mechanical excitation and electromagnetic excitation; Spiral case is arranged dynamic pressure ripple sensor, vibration acceleration sensor, arrange current vortex sensor at vane rotor place, blade is arranged wireless stress strain gauge and arrange vibration acceleration sensor at the bearing place of motor and under-chassis place, and each sensor connects collection and data analysis set-up, for obtaining the vibration transmissibility of fluid excitation source respectively, realize fluid excitation source quantitative performance and according to quantitative excitation source specificity analysis.
Description
Technical field
The present invention relates to a kind of centrifugal pump test device, especially a kind of decoupling zero testing apparatus of centrifugal pump.
Background technique
Centrifugal pump is a kind of is the universal fluid machinery being transferred fluid pressure energy and kinetic energy by the changes mechanical energy of prime mover, reduce centrifugal pump vibration noise to be not only conducive to extending its working life, also can improve working environment and its periphery living environment of equipment operation simultaneously.
The excitation source causing centrifugal pump vibration noise forms primarily of three aspects: fluid excitation, mechanical excitation and electromagnetic excitation, wherein fluid excited vibration noise creates the pulsation of fluid unsteady flo w owing to streaking liquid during electric centrifugal pump vane rotary, and evoke centrifugal pump spiral casing, impeller vibration noise and be delivered to support, it is relevant with centrifugal pump flow field fluid flow, and the principal element affecting centrifugal pump flow field fluid flow has impeller structure parameter, vane type line, worm frame parameter, dynamic and static gaps etc.; Mechanical vibration noise is mainly caused by factors such as electric centrifugal pump bearing, rotor unbalances, is delivered to equipment under-chassis by the bearing of electric machine casing in electric centrifugal pump group and stator end cap; Electromagnetic vibration noise is the electromagnetic force wave that in motor gas-gap, electromagnetic field produces, evoke motor stator, rotor oscillation noise be delivered to support, it with motor gas-gap, interior harmonic field and consequent electromagnetic force wave amplitude, winding configuration, teeth groove form be relevant with the factor such as cooperation, level logarithm.
At present simulation calculation and simple frequency spectrum qualitative analysis aspect are mainly concentrated on to the research of electric centrifugal pump vibration noise, quantitative judge and the quantitative Treatment of excitation source cannot be realized.Existing electric centrifugal pump group main structure is made up of motor and centrifugal pump, spiral case is directly installed on electric motor end cap, or use transition supporting structure and motor rigidly connected, under this structural type, fluid excitation, mechanical excitation, the coupling of electromagnetic excitation height, the drive characteristic causing electric centrifugal pump vibration noise well cannot be separated and be identified, just from source, quantitative analysis and optimal design can not be carried out to centrifugal pump vibration noise.Centrifugal pump test device domestic at present can not realize the physical separation of the different drive characteristics such as fluid excitation, mechanical excitation, electromagnetic excitation, does not more realize the decoupling zero testing apparatus of the excitation of centrifugal pump fluid and mechanical excitation and electromagnetic excitation physical separation specially.
At present following defect is also existed to the research of electric centrifugal pump vibration noise:
(1) vibration noise that fluid excitation, mechanical excitation and electromagnetic excitation produce intercouples, the vibration noise response of electric centrifugal pump group is the aliasing coupling of each excitation source, the separation of excitation source can not be realized, this brings great difficulty to the quantitative judge of excitation source, also cannot realize having the vibration and noise reducing of Directivity to design for the drive characteristic that centrifugal pump is different;
(2) under existing centrifugal pump structure, spiral case and motor are rigidly connected, and cannot complete the experimental studies of single factor test change to electric centrifugal pump vibration noise affecting laws such as spiral case inlet pressure design, spiral case rapidoprint and processing technology.
Summary of the invention
The present invention is the decoupling zero testing apparatus that will provide a kind of centrifugal pump, under the prerequisite not changing performance of centrifugal pump parameter, realizes the physical separation of the excitation of centrifugal pump fluid and mechanical excitation and electromagnetic excitation; Can encourage centrifugal pump fluid, motor electromagnetic excitation, mechanical excitation and vibration transmissibility further investigate, worm frame or changes in material can be completed to the experimental study of vibration equipment influence of noise rule simultaneously.
For achieving the above object, technological scheme of the present invention is: a kind of decoupling zero testing apparatus of centrifugal pump, comprise centrifugal pump spiral casing, be positioned at the blade of centrifugal pump spiral casing, vane rotor, the drive motor of centrifugal pump, be characterized in: spiral case is by being separated decoupling zero support installing on spiral case supporting base, vane rotor is arranged on the motor shaft of the drive motor of centrifugal pump, drive motor is arranged on motor support pedestal, and spiral case supporting base and motor support pedestal separate, make physical separation between spiral case and drive motor rotor, realize fluid excitation, the vibration uncoupling of mechanical excitation and electromagnetic excitation, spiral case is arranged dynamic pressure ripple sensor, acceleration transducer, arrange current vortex sensor at vane rotor place, blade is arranged wireless stress strain gauge and arrange acceleration transducer at the bearing place of motor and under-chassis place, and each sensor connects collection and data analysis set-up, for obtaining the vibration transmissibility of fluid excitation source respectively, realize fluid excitation source quantitative performance and according to quantitative excitation source specificity analysis.
The pump cover of centrifugal pump is installed on the lower flange place of drive motor, and the seal style between pump cover with lower flange is that labyrinth seal 10 coordinates O type silica gel ring to seal the double seal pattern of 11.
Motor support pedestal is rigid support pedestal or elastic support pedestal.
First and second acceleration transducer 5,14 is arranged, for testing of electric motors vibration acceleration in the under-chassis position of drive motor 4.
The lower flange place of drive motor arranges the 3rd acceleration transducer 12, arranges the 4th acceleration transducer 13, for testing the vibration acceleration of two positions in the spiral case corresponding position of centrifugal pump.
Dynamic pressure ripple sensor 7 is arranged near near the 4th acceleration transducer 13 on spiral case, and is evenly arranged along spiral case circumference, from snail tongue position, arrange one every 90 °, for testing the fluid excitation that pump operation produces.
Current vortex sensor 8 is fixed on motor support pedestal 3, and stretches to motor shaft outer surface, and two current vortex sensors are that 90 ° of angles are arranged, for testing the radial displacement of axle system.
Beneficial effect of the present invention:
The present invention mainly contains following feature:
(1) water pump spiral casing of the present invention's design is installed with independent mounting bracket and spiral case pedestal, vane rotor is arranged on motor shaft, motor under-chassis and motor base are installed, the physical separation between spiral case and rotor can be realized, namely realize the vibration uncoupling of fluid excitation and mechanical excitation and electromagnetic excitation.By arranging dynamic pressure ripple sensor, vibration acceleration sensor on spiral case, arrange current vortex sensor at vane rotor place, blade is arranged wireless stress strain gauge and arrange that vibration acceleration sensor can obtain the vibration transmissibility of fluid excitation source respectively at the bearing place of motor and under-chassis place, realize the quantitative performance analysis of fluid excitation source and have the vibration and noise reducing of Directivity to design, for low noise water pump research and design provides technical support according to the realization of quantitative excitation source characteristic (containing transmission characteristics).
(2) the present invention can measure spiral case and motor is rigidly connected and the vibratory response under physical separation two states, by vibration characteristics under comparative analysis two states, centrifugal pump vibration bang path can be obtained, thus can be optimized the linkage structure of electric centrifugal pump, reduce the vibration passing of equipment.
(3) present invention achieves the physical separation of spiral case and vane rotor and motor case, by changing spiral case inlet pressure structural design, and research adopts new material, novel process to manufacture spiral case, can be used for research worm frame or changes in material on the impact of vibration equipment, the Low Noise Design for worm frame proposes concrete requirement.
(4) present invention achieves the physical separation of motor case and spiral case, significantly reduce the impact of fluid excitation on motor oscillating, carrier frequency (5kHz, 10kHz, 15kHz etc.) by changing frequency variator changes electric current quality, to obtain drive motor drive characteristic to the influence of noise of centrifugal pump drive motor partial vibration.
Device of the present invention can realize carrying out correlation test by under fluid excitation and mechanical excitation and electromagnetic excitation decoupling zero situation, specifically comprises:
1) excitation of centrifugal pump fluid and mechanical excitation and electromagnetic excitation physical separation can be realized;
2) directly can carry out fluid excitation to encourage static part Vibration-coupling moving element Vibration-coupling and fluid;
3) research of centrifugal pump flow passage components structural behaviour parameter and vibration characteristics relation can be carried out, for the change of centrifugal pump single factor test provides law study to influence of vibration.
Accompanying drawing explanation
Fig. 1 is the principle schematic of centrifugal pump decoupling zero testing apparatus of the present invention;
Fig. 2 is centrifugal pump decoupling zero testing apparatus structural representation of the present invention;
Fig. 3 is decoupling zero seal form structural representation;
Fig. 4 is separated decoupling zero supporting structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As Fig. 1, shown in 2, a kind of decoupling zero testing apparatus of centrifugal pump, primarily of decoupled system, support system, water pump system, drive system, test system composition.
Decoupled system forms by being separated decoupling zero support 2.Support system is made up of spiral case supporting base 1, motor support pedestal 3, and water pump system 6 is made up of the parts such as impeller, spiral case of centrifugal pump.Drive system is made up of drive motor 4.Test system is made up of acceleration transducer, wireless stress strain gauge 15, dynamic pressure ripple sensor 7, current vortex sensor 8 and signals collecting and data analysis set-up 9 etc.
Spiral case is arranged on spiral case supporting base 1 by being separated decoupling zero support 2, vane rotor is arranged on the motor shaft of drive motor 4, drive motor 4 is arranged on motor support pedestal 3, and spiral case supporting base 1 and motor support pedestal 3 separate, make physical separation between spiral case and drive motor rotor, realize the vibration uncoupling of fluid excitation, mechanical excitation and electromagnetic excitation; Spiral case is arranged dynamic pressure ripple sensor 7, acceleration transducer, arrange current vortex sensor 8 at vane rotor place, blade is arranged wireless stress strain gauge 15 and arrange acceleration transducer at the bearing place of motor and under-chassis place, and each sensor connects collection and data analysis set-up 9, for obtaining the vibration transmissibility of fluid excitation source respectively, realize fluid excitation source quantitative performance and according to quantitative excitation source specificity analysis.
According to the optional rigid support pedestal of test objective drive system or elastic support pedestal; Drive motor 4 is installed on motor support pedestal 3, the dynamic components such as the impeller in water pump system 6 are installed on the outrigger shaft of drive motor 4, pump cover is installed on motor lower flange place, spiral case is by being separated decoupling zero support 2(Fig. 4) be installed on spiral case supporting base 1, the excitation of centrifugal pump fluid and mechanical excitation and electromagnetic excitation physical separation can be realized.
As shown in Figure 3, the pump cover after decoupling zero and the sealing between lower flange adopt labyrinth seal 10 to coordinate O type silica gel ring to seal the double seal pattern of 11, guarantee the reliability being separated rear static seal.
Based on the above structure, the present invention to be separated the test method concrete steps after decoupling zero to the excitation of centrifugal pump fluid with mechanical excitation and launching characteristics as described below:
1) drive motor 4 is fixed on motor support pedestal 3; By pump cover and motor cabinet tight joint; Impeller is installed; Mounting O-shaped silica gel sealing ring; Spiral case is installed, with locating stud location, with attachment bolt tight joint; Before tighting a bolt, between spiral case and motor cabinet, insert the thick assistant metal pad of 1mm, after ensureing tight joint, leave 1mm gap between the two; Install and be separated decoupling zero support 2, regulate support system, make to be separated decoupling zero support 2 and naturally connect rear bolton with the spiral case in water pump system 6; Remove all attachment bolts, locating stud and the assistant metal pad between spiral case and motor cabinet; Complete low speed rotation pump shaft after installing, check assembly quality, if find the anomalies such as stuck, repeat above step, until meet the demands.
2) first and second acceleration transducer 5,14 is arranged in drive motor 6 under-chassis position, testing of electric motors vibration acceleration, major mechanical energizing frequency and electromagnetic excitation frequency can be analyzed.Comprise main energizing frequency composition in signal to have: the axle of the axle system that mechanical excitation and rotor and impeller form frequently and harmonic frequency; Electromagnetic excitation and motor electromagnetic frequency and harmonic wave thereof.
3) the 3rd acceleration transducer 12 is arranged in motor cabinet lower flange place, the 4th acceleration transducer 13 is arranged in water pump spiral casing corresponding position, test two position vibration accelerations, by comparative analysis 2 test datas, separation machinery excitation and electromagnetic excitation are on the impact of water pump spiral casing.
4) dynamic pressure ripple sensor 7 is arranged on spiral case near near the 4th acceleration transducer 13, can be evenly arranged along spiral case circumference, from snail tongue position, arrange one every 90 °, the fluid excitation that test pump operation produces, the excitation of this fluid is not disturbed by mechanical factors such as motors.And record vibrating numerical by pressure pulsation numerical value and the 4th acceleration transducer 13 and contrast, analysing fluid excitation causes the size of solid wall surface vibration.Test signal frequency component mainly comprises the wideband fluid excitation of leaf frequency and harmonic frequency and water pump herein.
5) be fixed on motor support pedestal 3 by current vortex sensor 8, and stretch to motor shaft outer surface, two current vortex sensors are that 90 ° of angles are arranged, the radial displacement of test axle system; Wireless stress strain gauge is pasted on impeller, analysing fluid can be avoided to encourage and put on the influence that axle system brings.
6) first to fourth acceleration transducer 5,12,13,14, current vortex sensor 8, wireless stress strain gauge 15, pressure pulsation sensor 7 is all connected with dynamic data collection system 9.Drive motor 4 is opened, drive motor 4 operate impeller rotate, dynamic data collection system 9 can be opened after pilot system running is stable and start image data, and can need to regulate motor speed, water pump operation parameter etc. according to research, repeat step 2)-5) and in data capture, carry out the analysis of experiments under different operating mode.After the collection corresponding time, close drive motor 4, system shuts down.
Except separation decoupling zero support 2 is installed on spiral case side, also separation decoupling zero support 2 can be arranged on other positions such as spiral case bottom surface and realizes physical separation; Except vertical installation, also horizontal installation the effect that this testing apparatus realizes can be reached.
Claims (7)
1. the decoupling zero testing apparatus of a centrifugal pump, comprise the spiral case of centrifugal pump, be positioned at the blade of the spiral case of centrifugal pump, vane rotor, the drive motor (4) of centrifugal pump, it is characterized in that: described spiral case is arranged on spiral case supporting base (1) by being separated decoupling zero support (2), vane rotor is arranged on the motor shaft of drive motor (4), drive motor (4) is arranged on motor support pedestal (3), and spiral case supporting base (1) and motor support pedestal (3) separate, make physical separation between spiral case and drive motor rotor, realize fluid excitation, the vibration uncoupling of mechanical excitation and electromagnetic excitation, spiral case is arranged dynamic pressure ripple sensor (7), acceleration transducer, arrange current vortex sensor (8) at vane rotor place, blade is arranged wireless stress strain gauge (15) and arrange acceleration transducer at the bearing place of motor and under-chassis place, and each sensor connects collection and data analysis set-up, for obtaining the vibration transmissibility of fluid excitation source respectively, realize fluid excitation source quantitative performance and according to quantitative excitation source specificity analysis.
2. the decoupling zero testing apparatus of centrifugal pump according to claim 1, it is characterized in that: described centrifugal pump, its pump cover is installed on the lower flange place of drive motor, and the seal style between pump cover with lower flange is that labyrinth seal (10) coordinates O type silica gel ring to seal the double seal pattern of (11).
3. the decoupling zero testing apparatus of centrifugal pump according to claim 1, is characterized in that: described motor support pedestal (3) is rigid support pedestal or elastic support pedestal.
4. the decoupling zero testing apparatus of centrifugal pump according to claim 1, is characterized in that: first and second acceleration transducer (5,14) is arranged, for testing of electric motors vibration acceleration in the under-chassis position of described drive motor (4).
5. the decoupling zero testing apparatus of centrifugal pump according to claim 1, it is characterized in that: the lower flange place of described drive motor (4) arranges the 3rd acceleration transducer (12), the 4th acceleration transducer (13) is arranged, for testing the vibration acceleration of two positions in the spiral case corresponding position of centrifugal pump.
6. the decoupling zero testing apparatus of centrifugal pump according to claim 1, it is characterized in that: described dynamic pressure ripple sensor (7) is arranged on spiral case near near the 4th acceleration transducer (13), and be evenly arranged along spiral case circumference, one is arranged every 90 °, for testing the fluid excitation that pump operation produces from snail tongue position.
7. the decoupling zero testing apparatus of centrifugal pump according to claim 1, it is characterized in that: described current vortex sensor (8) is fixed on motor support pedestal (3), and stretching to motor shaft outer surface, two current vortex sensors are that 90 ° of angles are arranged, for testing the radial displacement of axle system.
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| CN201410410605.8A CN104141618B (en) | 2014-08-20 | 2014-08-20 | The decoupling zero testing apparatus of centrifugal pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106768752A (en) * | 2016-11-11 | 2017-05-31 | 哈尔滨工程大学 | Stream excited vibration separator and test method in a kind of centrifugal pump |
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| CN105317704B (en) * | 2015-11-26 | 2017-01-11 | 江苏大学 | Centrifugal pump operation condition judgment method |
| CN108254149B (en) * | 2018-01-22 | 2019-12-17 | 航天科工防御技术研究试验中心 | Multi-axis vibration and impact composite environment test system |
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Inventor after: Li Guoping Inventor after: Wang Qiang Inventor after: Chen Changsheng Inventor after: Liu Ruifeng Inventor after: Zhou Xiangrong Inventor after: Dai Xuechang Inventor after: Ma Zhenlai Inventor before: Li Guoping Inventor before: Wang Qiang Inventor before: Chen Changsheng Inventor before: Liu Ruifeng Inventor before: Zhou Xiangrong Inventor before: Dai Xuechang |
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Effective date of registration: 20190812 Address after: 200031 Xuhui District, Hengshan Road, No. 10, Co-patentee after: SHANGHAI CSIC SHIP PROPULSION EQUIPMENT CO., LTD. Patentee after: China Shipbuilding Industry Corp seventh 0 four Institute Address before: 200031 Xuhui District, Hengshan Road, No. 10, Patentee before: China Shipbuilding Industry Corp seventh 0 four Institute |
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