CN112229601A - Pulsating pressure test system for rotating impeller of water jet propulsion hydraulic model - Google Patents
Pulsating pressure test system for rotating impeller of water jet propulsion hydraulic model Download PDFInfo
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- CN112229601A CN112229601A CN202011083546.XA CN202011083546A CN112229601A CN 112229601 A CN112229601 A CN 112229601A CN 202011083546 A CN202011083546 A CN 202011083546A CN 112229601 A CN112229601 A CN 112229601A
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- impeller
- jet propulsion
- pulsating pressure
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000003566 sealing material Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000011056 performance test Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a pulsating pressure test system of a rotary impeller of a water jet propulsion hydraulic model aiming at the requirement of the pulsating pressure test of the water jet propulsion rotary impeller, the test system is based on a hydraulic system of the water jet propulsion hydraulic performance test, a pressure sensor is arranged on a blade of the rotary impeller, an electric connector fixed in an inlet guide cap is adopted to connect an output cable of the pressure sensor and a connecting cable in an impeller shaft, and the connecting cable is connected to a data acquisition and analysis system, so that the pressure sensor, the data acquisition and analysis system and the device can synchronously rotate in the operation process, the real-time measurement of the pulsating pressure of the rotary impeller of the water jet propulsion hydraulic model is realized, and the system has the characteristics of exquisite structure, strong operability and the like.
Description
Technical Field
The invention relates to a pulsating pressure testing system for a rotary impeller of a water jet propulsion hydraulic model, and belongs to the field of ship propulsion.
Background
The flow passage component of the water jet propeller generates pulsating pressure during operation, wherein the pulsating pressure on the surface of the blade of the impeller is an important influence factor influencing the hydrodynamic performance and the acoustic performance of the water jet propeller pump. The measurement of the pulsating pressure value of the blade is a requirement for researching the microscopic flow field of the blade of the rotating impeller under the operating condition of the water jet propulsion pump, is a basis for optimizing the hydrodynamic design of the water jet propulsion and improving the technical level of low-noise water jet propulsion, and is a necessary means for exploring the flow mechanism of the water jet propulsion. Generally, a pulsating pressure measuring method of a hydraulic machine is basically on a non-rotating part, and no special test system exists for testing the pulsating pressure of a rotating blade of a water jet propulsion pump.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the pulsating pressure test of the rotating blade of the water jet propulsion pump has no problem of a special test system.
In order to solve the problems, the technical scheme of the invention is to provide a pulsating pressure testing system for a rotating impeller of a water-jet propulsion hydraulic model, which is characterized in that: including establishing the test pipeline section between hydraulic system import pipeline section and hydraulic system export pipeline section, establishing water jet propulsion hydraulic model, data acquisition and analytic system, pressure sensor in the test pipeline section, water jet propulsion hydraulic model includes rotatory impeller, guide vane body, impeller shaft and establishes the water conservancy diversion cap at the impeller shaft both ends, rotatory impeller and guide vane body are established on the impeller shaft, and the impeller shaft drives rotatory impeller rotation, pressure sensor establishes the real-time pulsating pressure that is used for detecting rotatory impeller blade on rotatory impeller's blade, rotatory impeller is connected to impeller shaft one end, and the other end passes hydraulic system export pipeline section and is connected with analytic system with data acquisition, data acquisition and analytic system receive pressure sensor's pulsating pressure signal and carry out the analysis to the pulsating pressure data of rotatory impeller blade.
Preferably, the impeller shaft is a hollow sealed shaft, and the inner bore of the shaft is used for passing through a connecting cable for connecting the data acquisition and analysis system and the pressure sensor.
Preferably, the test pipe section comprises an impeller outer pipe connected with the hydraulic system inlet pipe section and a connecting pipe connected with the hydraulic system outlet pipe section, and the impeller outer pipe and the connecting pipe are connected through a guide vane body.
Preferably, the guide cap comprises an inlet guide cap and an outlet guide cap which are arranged at two ends of the impeller shaft and used for guiding flow.
Preferably, the pressure sensor and the connection cable are connected by an electrical connector, which is fixed inside the inlet deflector cap.
Preferably, the data acquisition and analysis system is connected with the impeller shaft through a coupling, and the connecting cable penetrates through the coupling.
Preferably, a cable trough is arranged on the hub of the rotary impeller, and an output cable of the pressure sensor is connected with an electrical connector through the cable trough.
Preferably, one end of the impeller shaft is provided with an inlet guide cap, and the other end of the impeller shaft sequentially penetrates through the rotary impeller, the guide vane body, the outlet guide cap and the outlet pipe section of the hydraulic system from the inlet to the outlet of the hydraulic system to be connected with the coupling.
Preferably, a shaft sleeve is arranged between the guide vane body and the impeller shaft.
Preferably, the two ends of the impeller shaft are filled with sealing materials, so that the connecting cable is watertight and cannot be swung when the impeller shaft runs.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a pulsating pressure test system of a rotary impeller of a water jet propulsion hydraulic model aiming at the requirement of the pulsating pressure test of the water jet propulsion rotary impeller, the test system is based on a hydraulic system of the water jet propulsion hydraulic performance test, a pressure sensor is arranged on a blade of the rotary impeller, an electric connector fixed in an inlet guide cap is adopted to connect an output cable of the pressure sensor and a connecting cable in an impeller shaft, and the connecting cable is connected to a data acquisition and analysis system, so that the pressure sensor, the data acquisition and analysis system and the device can synchronously rotate in the operation process, the real-time measurement of the pulsating pressure of the rotary impeller of the water jet propulsion hydraulic model is realized, and the system has the characteristics of exquisite structure, strong operability and the like.
Drawings
FIG. 1 is a schematic diagram of a system for testing pulsating pressure of a rotating impeller of a water jet propulsion hydraulic model.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the invention relates to a test pipe section-based pulsating pressure testing system for a rotary impeller of a water jet propulsion hydraulic model, which mainly comprises an impeller outer pipe 1, an inlet guide cap 2, a rotary impeller 3, a guide vane body 4, a connecting pipe 5, an outlet guide cap 6, an electrical connector 7, a pressure sensor 8, an impeller shaft 9, a connecting cable 10, a coupler 11 and a data acquisition and analysis system 12.
The impeller outer pipe 1 and the connecting pipe 5 form a test pipe section, one end of the test pipe section is connected with an inlet pipe section of a test bench hydraulic system, the other end of the test pipe section is connected with an outlet pipe section of the hydraulic system, and a pipeline of the test pipe section is made of an antirust metal material or organic glass. One end flange face of the impeller outer pipe 1 is connected with a hydraulic system inlet straight pipe section through a bolt, the other end face of the impeller outer pipe 1 is connected with a guide vane body 4 flange end face through a bolt, one end flange face of the connecting pipe 5 is connected with the other end face of the guide vane body 4 through a bolt, the other end face of the connecting pipe 5 is connected with a hydraulic system outlet pipe section through a bolt, so that the hydraulic system is connected through a test pipe section to keep watertight, and can normally operate under a water spray propulsion test working condition.
The test pipe section is internally provided with a water jet propulsion hydraulic model which comprises an inlet guide cap 2, a rotary impeller 3, a guide vane body 4, an outlet guide cap 6 and an impeller shaft 9. An inlet guide cap 2 and a rotary impeller 3 are arranged in the impeller outer tube 1, and an outlet guide cap 6 is arranged in the connecting tube 5. The rotary impeller 3 and the guide vane body 4 are arranged on an impeller shaft 9, and the inlet guide cap 2 and the outlet guide cap 6 are respectively arranged at two ends of the impeller shaft 9. The impeller shaft 9 is a hollow shaft, the middle hollow part is used for installing a connecting cable 10, the rotary impeller 3 is connected with the impeller shaft 9 through a key, an embedded pressure sensor 8 for measuring the pulsating pressure of the impeller is installed on the blade of the rotary impeller 3, an electrical connector 7 is arranged in the inlet diversion cap 2, the electrical connector 7 is respectively connected with an output cable of the pressure sensor 8 and the connecting cable 10, and then is connected with a data acquisition and analysis system 12 at the shaft end of the impeller shaft 9 through the connecting cable 10, so that pulsating pressure signals are acquired, and the time domain and frequency domain characteristics of the pulsating pressure are analyzed.
The rotary impeller 3 can be made of stainless steel or aluminum alloy, mounting grooves are machined in the designated positions of the blades of the rotary impeller 3 according to the test requirements and used for arranging the pressure sensors 8, and the groove depth of each mounting groove is slightly larger than the thickness of each pressure sensor 8. An output cable mounting groove is processed behind the mounting groove, an output cable wiring groove is processed on the hub of the rotary impeller 3, and an output cable of the pressure sensor 8 is connected with the electric connector 7 through the output cable wiring groove. When the hydraulic system runs, the pulsating pressure on the blades of the rotating impeller 3 is measured by the pressure sensor 8 to obtain the real-time pressure.
The pressure sensor 8 is installed on the surface of the blade of the rotary impeller 3, the output cable of the pressure sensor 8 passes through the output cable installation groove on the blade, the cable wiring groove on the impeller hub is coated with sealing material after installation, the operation is ensured to be watertight, and the sealing material is coated on the pressure sensor 8 after the pressure sensor is installed, so as to ensure the watertight performance. The pressure sensor 8 is connected to an electrical connector 7 mounted in the inlet hood 2, ensuring that the pressure sensor 8 and the output cable rotate synchronously with the rotary impeller 3 and do not move relative to each other when the rotary impeller 3 rotates.
The inlet diversion cap 2 is made of nylon or aluminum alloy materials, the interior of the inlet diversion cap is hollow, the inlet diversion cap is used for placing the electrical connector 7, the electrical connector 7 needs to be fixed inside the inlet diversion cap 2, and the inlet diversion cap 2 cannot move relatively during operation. The inlet guide cap 2 is connected with the impeller shaft 9 through a bolt.
The electrical connector 7 is a watertight part and can be in a circular or rectangular connector form, one end of a connector of the electrical connector 7 is connected with an input cable of the pressure sensor 8, the other end of the connector is connected with a connecting cable 10, the connecting cable 10 is welded to a pin of the connector, and the electrical connector 7 is connected with a data acquisition and analysis system 12 installed on the outer end of the coupler 11 through the connecting cable 10.
The impeller shaft 9 is a hollow shaft, an electric connector 7 in the inlet guide cap 2 is connected with an input cable of a data acquisition and analysis system 12 through a connecting cable 10 penetrating through an inner cavity of the impeller shaft 9, epoxy or other sealing materials are filled at two ends of the impeller shaft 9, epoxy can be filled in an inner hole of the whole impeller shaft 9, the connecting cable 10 is ensured to be watertight, and the impeller shaft 9 cannot be swung when running.
A wiring groove is formed in the end face of the coupler 11, the connecting cable 10 penetrating out of the impeller shaft 9 is led out from the end face of the coupler 11, materials such as epoxy are coated on the surface of the wiring groove after installation, the effect of fixing the connecting cable 10 is achieved, the connecting cable 10 is ensured to rotate along with the operation of the coupler 11, and relative movement cannot be generated. The outer end face of the coupling 11 is provided with a key groove for connecting the impeller shaft 9 and the data acquisition and analysis system 12.
The data acquisition and analysis system 12 is mounted at the outer end of the coupler 11 through key connection, can adopt a split axle-clasping mode, and is further fixed with the impeller shaft 9 through a key, so that relative movement cannot be generated during operation. The data acquisition and analysis system 12 may be built-in, and the data may be derived after the test is completed, or may be non-contact to output the data in real time, but the stability of non-contact data output at high rotation speed is ensured.
The invention discloses a use method of a rotating impeller pulsating pressure test system of a water jet propulsion hydraulic model, which comprises the following steps:
step one, completing the installation of the water jet propulsion hydraulic model test pipe section, starting the data acquisition and analysis system 12, confirming that the data acquisition and analysis system 12 operates normally, and closing the data acquisition and analysis system 12.
And step two, starting the test operation of the hydraulic system and confirming that the operation state is good.
And step three, starting the water jet propulsion hydraulic model to operate under the test working condition, and starting the pressure sensor 8 and the data acquisition and analysis system 12 after the operation is stable until the required data acquisition is finished.
And step four, closing the data acquisition and analysis system 12, stopping the operation of the hydraulic system, and processing the acquired pulsating pressure signal to obtain the time domain and frequency domain characteristics of the water jet propulsion pulsating pressure. And completing a pulsating pressure test of the rotating impeller of the water jet propulsion hydraulic model.
Claims (10)
1. The utility model provides a rotatory impeller pulsating pressure test system of water jet propulsion water model which characterized in that: including establishing the test pipeline section between hydraulic system import pipeline section and hydraulic system export pipeline section, establishing water jet propulsion hydraulic model, data acquisition and analytic system (12), pressure sensor (8) in the test pipeline section, water jet propulsion hydraulic model includes rotatory impeller (3), guide vane body (4), impeller shaft (9) and establishes the water conservancy diversion cap at impeller shaft (9) both ends, establish on impeller shaft (9) rotatory impeller (3) and guide vane body (4), impeller shaft (9) drive rotatory impeller (3) are rotatory, pressure sensor (8) are established and are used for detecting the real-time pulsating pressure of rotatory impeller (3) blade on the blade of rotatory impeller (3), rotatory impeller (3) are connected to impeller shaft (9) one end, and the other end passes hydraulic system export pipeline section and is connected with analytic system (12) data acquisition, data acquisition and analytic system (12) receive the pulsating pressure signal pairing rotation of pressure sensor (8) The pulsating pressure data of the blades of the impeller (3) are collected and analyzed.
2. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: the impeller shaft (9) is a hollow sealing shaft, and a shaft inner hole is used for penetrating through a connecting cable (10) for connecting a data acquisition and analysis system (12) and the pressure sensor (8).
3. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: the test pipe section comprises an impeller outer pipe (1) connected with the inlet pipe section of the hydraulic system and a connecting pipe (5) connected with the outlet pipe section of the hydraulic system, and the impeller outer pipe (1) is connected with the connecting pipe (5) through a guide vane body (4).
4. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: the guide cap comprises an inlet guide cap (2) and an outlet guide cap (6) which are arranged at the two ends of the impeller shaft (9) and used for guiding flow.
5. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: the pressure sensor (8) is connected with the connecting cable (10) through an electrical connector (7), and the electrical connector (7) is fixed in the inlet diversion cap (2).
6. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: the data acquisition and analysis system (12) is connected with the impeller shaft (9) through a coupler (11), and the connecting cable (10) penetrates through the coupler (11).
7. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: a cable wiring groove is formed in a hub of the rotary impeller (3), and an output cable of the pressure sensor (8) is connected with the electrical connector (7) through the cable wiring groove.
8. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: one end of the impeller shaft (9) is provided with an inlet guide cap (2), and the other end of the impeller shaft sequentially penetrates through the rotary impeller (3), the guide vane body (4), the outlet guide cap (6) and the outlet pipe section of the hydraulic system from the inlet to the outlet of the hydraulic system to be connected with the coupling (11).
9. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: a shaft sleeve is arranged between the guide vane body (4) and the impeller shaft (9).
10. The system for testing the pulsating pressure of the rotating impeller of the water-jet propulsion hydraulic model as claimed in claim 1, wherein: sealing materials are poured at two ends of the impeller shaft (9) to ensure that the connecting cable (10) is watertight and cannot swing when the impeller shaft (9) runs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011083546.XA CN112229601A (en) | 2020-10-12 | 2020-10-12 | Pulsating pressure test system for rotating impeller of water jet propulsion hydraulic model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011083546.XA CN112229601A (en) | 2020-10-12 | 2020-10-12 | Pulsating pressure test system for rotating impeller of water jet propulsion hydraulic model |
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| Publication Number | Publication Date |
|---|---|
| CN112229601A true CN112229601A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011083546.XA Pending CN112229601A (en) | 2020-10-12 | 2020-10-12 | Pulsating pressure test system for rotating impeller of water jet propulsion hydraulic model |
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| CN (1) | CN112229601A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202707521U (en) * | 2012-08-27 | 2013-01-30 | 哈尔滨电气动力装备有限公司 | Pump hydraulic model testing device |
| CN103950528A (en) * | 2014-04-10 | 2014-07-30 | 湖北三江船艇科技有限公司 | Axial-flow type water-jet propulsion pump |
| CN104215426A (en) * | 2014-09-22 | 2014-12-17 | 中国船舶工业集团公司第七〇八研究所 | Measuring device and measuring method of internal flow field and external characteristic of water-jet propeller |
| CN105823581A (en) * | 2016-05-12 | 2016-08-03 | 江苏大学 | System and method for wirelessly measuring the surface pressure of pump impeller blade |
| CN106015029A (en) * | 2016-05-12 | 2016-10-12 | 江苏大学 | System and method for measuring surface pressure of pump impeller blade |
| CN106704255A (en) * | 2017-02-08 | 2017-05-24 | 中国农业大学 | Centrifugal pump and impeller convenient to measure centrifugal pump blade pressure pulses |
| CN108750061A (en) * | 2018-04-16 | 2018-11-06 | 江苏大学镇江流体工程装备技术研究院 | A kind of shaft-driven axis stream of list is to revolving water jet propulsion pump |
| CN208076127U (en) * | 2018-04-27 | 2018-11-09 | 江苏金风科技有限公司 | Blade pressure pulsating detection system and wind power generating set |
| CN111306076A (en) * | 2020-02-26 | 2020-06-19 | 江苏大学 | Device and method for testing backflow vortex cavitation of vane pump |
| CN111498054A (en) * | 2020-05-13 | 2020-08-07 | 中国船舶工业集团公司第七0八研究所 | Device and method suitable for hull hydrodynamic model test of water jet propulsion ship |
-
2020
- 2020-10-12 CN CN202011083546.XA patent/CN112229601A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202707521U (en) * | 2012-08-27 | 2013-01-30 | 哈尔滨电气动力装备有限公司 | Pump hydraulic model testing device |
| CN103950528A (en) * | 2014-04-10 | 2014-07-30 | 湖北三江船艇科技有限公司 | Axial-flow type water-jet propulsion pump |
| CN104215426A (en) * | 2014-09-22 | 2014-12-17 | 中国船舶工业集团公司第七〇八研究所 | Measuring device and measuring method of internal flow field and external characteristic of water-jet propeller |
| CN105823581A (en) * | 2016-05-12 | 2016-08-03 | 江苏大学 | System and method for wirelessly measuring the surface pressure of pump impeller blade |
| CN106015029A (en) * | 2016-05-12 | 2016-10-12 | 江苏大学 | System and method for measuring surface pressure of pump impeller blade |
| CN106704255A (en) * | 2017-02-08 | 2017-05-24 | 中国农业大学 | Centrifugal pump and impeller convenient to measure centrifugal pump blade pressure pulses |
| CN108750061A (en) * | 2018-04-16 | 2018-11-06 | 江苏大学镇江流体工程装备技术研究院 | A kind of shaft-driven axis stream of list is to revolving water jet propulsion pump |
| CN208076127U (en) * | 2018-04-27 | 2018-11-09 | 江苏金风科技有限公司 | Blade pressure pulsating detection system and wind power generating set |
| CN111306076A (en) * | 2020-02-26 | 2020-06-19 | 江苏大学 | Device and method for testing backflow vortex cavitation of vane pump |
| CN111498054A (en) * | 2020-05-13 | 2020-08-07 | 中国船舶工业集团公司第七0八研究所 | Device and method suitable for hull hydrodynamic model test of water jet propulsion ship |
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Application publication date: 20210115 |