CN215865757U - Gas-liquid two-phase pump as turbine experiment table - Google Patents
Gas-liquid two-phase pump as turbine experiment table Download PDFInfo
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- CN215865757U CN215865757U CN202120973922.6U CN202120973922U CN215865757U CN 215865757 U CN215865757 U CN 215865757U CN 202120973922 U CN202120973922 U CN 202120973922U CN 215865757 U CN215865757 U CN 215865757U
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Abstract
The utility model belongs to the technical field of pump-used turbine experimental equipment, and discloses a gas-liquid two-phase pump-used turbine experimental bench. The gas-liquid two-phase pump used as a turbine experiment table comprises a slow release device, a gas-liquid mixed delivery pump, a pump used as a turbine and a magnetic powder brake; the magnetic powder brake is characterized in that the slow releaser is provided with an air inlet, a liquid inlet and an output port, the air inlet of the slow releaser is communicated with an external air source, the liquid inlet of the slow releaser is communicated with an external liquid source, the output port of the slow releaser is communicated with the inlet of the gas-liquid mixed delivery pump, the outlet of the gas-liquid mixed delivery pump is communicated with the inlet of the pump serving as a turbine, and the magnetic powder brake is connected with the output shaft of the pump serving as the turbine. The gas-liquid two-phase pump is used as a turbine experiment table, so that the error of the experiment result of the gas-liquid two-phase pump for turbine experiment can be reduced, the precision of the experiment result can be improved, the energy dissipation can be performed on the power of different shafts, and the experiment cost and the experiment process can be reduced.
Description
Technical Field
The utility model belongs to the technical field of pump-used turbine experimental equipment, and particularly relates to a gas-liquid two-phase pump-used turbine experimental bench.
Background
The centrifugal pump is used as turbine in reverse rotation (pump is used as turbine for short) and is an energy recovery device which can be used for recovering the pressure energy of high-pressure fluid in the coal chemical industry, seawater desalination and other process industries.
When performance prediction and structure optimization are performed on the pump turbine in a laboratory, efficiency and stability tests need to be performed on the pump turbine. Most of tests are directly carried out on a liquid phase test bench when a pump is used as a turbine, but a rich solution generated in the ammonia synthesis process is a gas-liquid mixed high-pressure fluid containing gas with the volume fraction of about 0-20%, and the problems of inaccurate result and large error exist when a conventional liquid phase test bench is adopted to carry out a pump-gas turbine test on the gas-liquid mixed high-pressure fluid.
In addition, in the current experiment process of using the pump as the turbine, aiming at the shaft power generated after the high-pressure fluid pushes the impeller of the pump as the turbine to rotate, energy dissipation is usually performed by means of centrifugal pumps with different rated powers, so that a plurality of centrifugal pumps with different rated powers can be prepared as energy dissipation pumps, the cost of experiment equipment is increased, switching among different energy dissipation pumps is required, and the flow and complexity of experiment operation are increased.
SUMMERY OF THE UTILITY MODEL
Based on the above, the utility model provides a gas-liquid two-phase pump as a turbine experiment table, which aims to solve the problems existing when a liquid phase experiment table is adopted for carrying out a pump as a turbine experiment at present. The gas-liquid two-phase pump is used as a turbine experiment table and comprises a slow release device, a gas-liquid mixed delivery pump, a pump serving as a turbine and a magnetic powder brake; the magnetic powder brake is characterized in that the slow releaser is provided with an air inlet, a liquid inlet and an output port, the air inlet of the slow releaser is communicated with an external air source, the liquid inlet of the slow releaser is communicated with an external liquid source, the output port of the slow releaser is communicated with the inlet of the gas-liquid mixed delivery pump, the outlet of the gas-liquid mixed delivery pump is communicated with the inlet of the pump serving as a turbine, and the magnetic powder brake is connected with the output shaft of the pump serving as the turbine.
Preferably, the gas-liquid two-phase pump serving as the turbine experiment table is further provided with a gas-liquid flowmeter, and the gas-liquid flowmeter is located between the output port of the slow release device and the inlet of the gas-liquid mixed delivery pump.
Preferably, the gas inlet of the slow releaser is provided with a gas phase flowmeter, and the liquid inlet of the slow releaser is provided with a liquid phase flowmeter.
Preferably, the gas-liquid two-phase pump used as the turbine experiment table is also provided with a low-pressure gas-liquid separation tank; the low-pressure gas-liquid separation tank is internally provided with a liquid phase area and a gas phase area, the gas phase area of the low-pressure gas-liquid separation tank is provided with gas and is communicated with the gas inlet of the slow-release device through a first gas phase pipeline, and the liquid phase area of the low-pressure gas-liquid separation tank is provided with liquid and is communicated with the liquid inlet of the slow-release device through a first liquid phase pipeline.
Further preferably, the gas-liquid two-phase pump as the turbine test bench is further provided with an air compressor, and the air compressor is communicated with the gas phase area of the low-pressure gas-liquid separation tank.
Further preferably, the gas-liquid two-phase pump as a turbine experiment table is also provided with a high-pressure gas-liquid separation tank, and a liquid phase region and a gas phase region are arranged in the high-pressure gas-liquid separation tank; the inlet of the high-pressure gas-liquid separation tank is communicated with the outlet of the pump serving as a turbine, the gas phase area of the high-pressure gas-liquid separation tank is communicated with the gas phase area of the low-pressure gas-liquid separation tank through a second gas phase pipeline, and the liquid phase area of the high-pressure gas-liquid separation tank is communicated with the liquid phase area of the low-pressure gas-liquid separation tank through a second liquid phase pipeline.
Preferably, the gas-liquid two-phase pump is provided with a variable frequency motor as a turbine experiment table, and an output shaft of the variable frequency motor is connected with the gas-liquid mixed transportation pump.
Further preferably, the gas-liquid two-phase pump is provided with a rotating speed and torque measuring instrument as a turbine experiment table, and the rotating speed and torque measuring instrument is located at a connecting position of the variable frequency motor and the gas-liquid mixed transportation pump and is used for acquiring rotating speed and torque of the gas-liquid mixed transportation pump.
Preferably, the casing of the pump turbine and the pipelines connected with the inlet and the outlet of the pump turbine are both made of transparent materials.
Preferably, the casing of the pump as the turbine and the pipeline connected with the inlet and the outlet of the pump as the turbine are made of organic glass materials.
In the gas-liquid two-phase pump turbine experiment table, the gas and the liquid are mixed in advance by arranging the slow release device to form a gas-liquid mixture, the gas-liquid mixture is pressurized by the gas-liquid mixing and conveying pump to do work and output the high-pressure gas-liquid mixture to the pump as a turbine so as to form the gas-liquid mixture to drive the rotation of an impeller in the pump as the turbine, and then the energy dissipation is performed on the power output by the pump as the turbine by the aid of the magnetic powder brake, so that the conversion of pressure energy to mechanical energy is completed. Therefore, the pump of the gas-liquid two-phase flow can be used as a turbine experiment, the result error existing when the pump of the gas-liquid two-phase flow is used as the turbine experiment by adopting the current liquid phase experiment table is reduced, the accuracy of the experiment result of the pump of the gas-liquid two-phase flow as the turbine experiment is improved, and the magnetic powder brake can be used for dissipating energy of different shaft powers output by the pump as the turbine, so that the use of energy dissipation pumps with different rated powers is omitted, the equipment cost is reduced, and the experiment operation is simplified.
Drawings
FIG. 1 is a schematic diagram of a gas-liquid two-phase pump as a turbine laboratory bench according to an embodiment of the present invention.
Detailed Description
The technical scheme of the utility model is described in detail in the following with reference to the accompanying drawings.
Referring to fig. 1, the gas-liquid two-phase pump as a turbine experiment table in this embodiment includes a slow-release device 1, a gas-liquid mixed transportation pump 2, a pump as a turbine 3, and a magnetic powder brake 4. The gas inlet of the slow releaser 1 is communicated with an external gas source to introduce gas, the liquid inlet of the slow releaser 1 is communicated with an external liquid source to introduce liquid, so that the gas and the liquid are mixed in the slow releaser 1 to form a gas-liquid mixture, and the output port of the slow releaser 1 is communicated with the inlet of the gas-liquid mixed delivery pump 2 through a pipeline with a valve to deliver the gas-liquid mixture to the gas-liquid mixed delivery pump 2 for pressurization. The outlet of the gas-liquid mixed transportation pump 2 is communicated with the inlet of the pump turbine 3 through a pipeline with a valve, and the magnetic powder brake 4 is connected with the output shaft of the pump turbine 3.
When the gas-liquid two-phase pump is used as a turbine experiment table to perform a gas-liquid two-phase pump turbine experiment, firstly, gas and liquid required by the experiment are mixed by the slow release device, such as air and water or carbon dioxide gas and water, so as to form a gas-liquid mixture satisfying the gas-liquid two-phase pump turbine experiment, then, the gas-liquid mixture in the slow release device is pressurized and does work by the gas-liquid mixed transmission pump, so as to obtain a gas-liquid mixture with high pressure energy, then, the gas-liquid mixture with pressure energy is transmitted to the pump as a turbine to push an impeller of the pump as the turbine to rotate at high speed, and the generated shaft power is subjected to energy dissipation by the magnetic powder brake, so that the conversion from the pressure energy to mechanical energy is realized, the recovery operation of energy is realized, and the purpose of performing the gas-liquid two-phase pump turbine experiment on the gas-liquid two-phase pump is finally achieved.
Preferably, a gas-liquid flow meter 5 is arranged in the gas-liquid two-phase pump as the turbine experiment table in the embodiment, and the gas-liquid flow meter 5 is located between the output port of the slow release device 1 and the inlet of the gas-liquid mixed transportation pump 2, and is used for performing real-time flow measurement on the gas-liquid mixture flowing into the gas-liquid mixed transportation pump 2 to obtain accurate experiment data, and the accurate experiment data is used as reference data for adjusting the gas-liquid mixed transportation pump to output the high-pressure energy gas-liquid mixture, so as to improve the final experiment accuracy.
Further, a gas phase flowmeter 6 is arranged at the gas inlet of the slow releaser 1 and used for detecting the flow of the gas input into the slow releaser 1, and a liquid phase flowmeter 7 is arranged at the liquid inlet of the slow releaser 1 and used for detecting the flow of the liquid input into the slow releaser 1.
At this moment, gas and liquid that just can carry out real-time flow detection to the gas and the liquid of input slow-release ware through set up gas phase flowmeter and liquid phase flowmeter respectively at the air inlet and the inlet of slow-release ware to can carry out real-time adjustment to the gas quantity and the liquid quantity of inputing in the slow-release ware based on this flow detection data, the precision of experiment is guaranteed to the gas-liquid ratio among the gas-liquid mixture that accurate control formed.
As shown in fig. 1, a low-pressure gas-liquid separation tank 8 is further provided in the gas-liquid two-phase pump turbine laboratory bench of the present embodiment, and a liquid phase region and a gas phase region are provided inside the low-pressure gas-liquid separation tank 8 to store liquid and gas forming a gas-liquid mixture, respectively. Wherein, the gas phase area of the low-pressure gas-liquid separation tank 8 is communicated with the gas inlet of the slow release device 1 through a first gas phase pipeline 9 so as to convey the gas in the low-pressure gas-liquid separation tank 8 to the slow release device 1. The liquid phase region of the low-pressure gas-liquid separation tank 8 is communicated with the liquid inlet of the slow-release device 1 through a first liquid phase pipeline 10 so as to convey the liquid in the low-pressure gas-liquid separation tank 8 to the slow-release device 1.
Through setting up low pressure gas-liquid separation jar to by low pressure gas-liquid separation jar as gas source and liquid source in order to carry out the transport of gas and liquid to the slow-release ware, just can carry out steady voltage operation in advance to the gas and the liquid that get into the slow-release ware with the help of low pressure gas-liquid separation jar, make gas and liquid get into the slow-release ware with the more steady state of pressure in, improve the control accuracy to carrying to gas volume and liquid volume in the slow-release ware, and then guarantee the gas-liquid proportion precision of gas-liquid mixture that forms.
As shown in fig. 1, an air compressor 11 is further provided in the gas-liquid two-phase pump turbine test bench of the present embodiment. The air compressor 11 is communicated with the gas phase zone of the low-pressure gas-liquid separation tank 8 through a valved pipe to charge compressed air into the low-pressure gas-liquid separation tank 8. Similarly, in other embodiments, other forms of gas sources can be selected for gas-liquid mixtures composed of other gases to output the gases into the low-pressure gas-liquid separation tank.
Further, as shown in fig. 1, a high-pressure gas-liquid separation tank 12 is provided in the gas-liquid two-phase pump turbine test bench of the present embodiment, and a gas phase region and a liquid phase region are provided inside the high-pressure gas-liquid separation tank 12. Wherein an inlet of the high-pressure gas-liquid separation tank 12 is communicated with an outlet of the pump turbine 3, a gas phase region of the high-pressure gas-liquid separation tank 12 is communicated with a gas phase region of the low-pressure gas-liquid separation tank 8 through a second gas phase pipeline 13, and a liquid phase region of the high-pressure gas-liquid separation tank 12 is communicated with a liquid phase region of the low-pressure gas-liquid separation tank 8 through a second liquid phase pipeline 14.
At the moment, a high-pressure gas-liquid mixture output by a pump as a turbine flows into the high-pressure gas-liquid separation tank, the high-pressure gas-liquid separation tank is used for releasing pressure of the high-pressure gas-liquid mixture, gas and liquid in the gas-liquid mixture are separated, and then the gas and the liquid are led back to the low-pressure gas-liquid separation tank through the second gas-phase pipeline and the second liquid-phase pipeline respectively, so that a closed experiment table is formed to recycle the gas and the liquid, the utilization rate of the gas and the liquid is improved, and the experiment cost is further reduced.
In addition, in this embodiment, the gas-liquid mixture transportation pump 2 is driven by the inverter motor 15 controlled by the inverter, so as to adjust the high-pressure gas-liquid mixture output by the gas-liquid mixture transportation pump 2 by controlling the inverter motor 15, so as to meet the requirement of the high-pressure gas-liquid mixture flowing into the turbine of the pump in different experiments, and improve the experimental efficiency of the gas-liquid two-phase pump as a turbine experimental bench.
Meanwhile, a rotating speed and torque measuring instrument 16 is further arranged at the connecting position of the variable frequency motor 15 and the gas-liquid mixed delivery pump 2 and used for acquiring the actual rotating speed and torque of the gas-liquid mixed delivery pump 2 in real time to serve as parameters for calculating the efficiency of the pump serving as a turbine.
Preferably, in the gas-liquid two-phase pump turbine laboratory bench of the present embodiment, the casing of the pump turbine and the pipelines connected to the inlet and the outlet of the pump turbine are made of transparent materials, such as organic glass. Therefore, the change conditions of the internal structure and the internal fluid of the pump as well as the change of the fluid in the pipeline can be directly observed through the shell of the pump as the turbine, so that the visual experimental effect is achieved, and the experimental effect is further improved.
In addition, in the gas-liquid two-phase pump turbine test bench of the present embodiment, a pressure gauge 17, a safety valve 18, and an instrument console 19 are provided. The pressure gauge 17 is distributed on the pipeline with valve between the low-pressure gas-liquid separation tank 8, the high-pressure gas-liquid separation tank 12, the gas-liquid mixed transportation pump 2 and the pump acting turbine 3 to detect the pressure of the gas-liquid mixture at different positions, and the safety valve 18 is respectively arranged on the low-pressure gas-liquid separation tank 8 and the high-pressure gas-liquid separation tank 12 to control the pressure in the low-pressure gas-liquid separation tank 8 and the high-pressure gas-liquid separation tank 12 to ensure the safety of the whole experimental process. The instrument console 19 is used for carrying out centralized monitoring on the frequency converter and the pressure gauge, and at the moment, all pipelines with valves can be matched with electromagnetic valves to be integrated into the instrument console for centralized control, so that the control integration level and the control convenience of the gas-liquid two-phase pump as a turbine experiment table are improved.
Referring to fig. 1, the specific process of using the gas-liquid two-phase pump of this embodiment as a turbine test bench to perform a water-gas two-phase pump turbine test is as follows:
firstly, injecting an aqueous medium into a low-pressure gas-liquid separation tank 8, and injecting compressed air into the low-pressure gas-liquid separation tank 8 through an air compressor 11;
secondly, respectively introducing air and water media in the low-pressure gas-liquid separation tank 8 into the slow-release device 1 through the first gas phase pipeline 9 and the first liquid phase pipeline 10, and forming a water-gas mixture in the slow-release device 1, wherein the proportional relation of the air and the water media entering the slow-release device 1 is accurately regulated and controlled through the gas phase flowmeter 6, the liquid phase flowmeter 7, the first gas phase pipeline 9 and the valve on the first liquid phase pipeline 10;
and thirdly, driving the gas-liquid mixed conveying pump 2 to rotate through the variable frequency motor 15, performing pressurization work on the water-gas mixture in the slow release device 1 to obtain a high-pressure water-gas mixture, conveying the high-pressure water-gas mixture into the pump serving as a turbine 3 to drive an impeller of the pump serving as the turbine 3 to rotate at a high speed, and dissipating energy by using the generated shaft power through the magnetic powder brake 4 to complete conversion from pressure energy to mechanical energy. In the process, the magnetic powder brake can be adjusted in real time according to the shaft power generated by the pump as a turbine, so that the energy dissipation effect on different shaft powers is met. Meanwhile, data obtained by detection of the rotating speed and torque measuring instrument 16 are recorded in real time for subsequent calculation of the turbine efficiency of the pump;
and fourthly, pumping a water-gas mixture with pressure output by the turbine 3 into a high-pressure gas-liquid separation tank 12 for pressure relief and water-gas separation, and respectively guiding air and water media into a low-pressure gas-liquid separation tank 8 through a second gas-phase pipeline 13 and a second liquid-phase pipeline 14, so that the air and water media are recycled, wherein when the air pressure of the low-pressure gas-liquid separation tank 8 is too low, compressed air can be supplemented into the low-pressure gas-liquid separation tank 8 through an air compressor 11, and the experiment can be continuously carried out.
Claims (10)
1. A gas-liquid two-phase pump is taken as a turbine experiment table and is characterized by comprising a slow release device, a gas-liquid mixed delivery pump, a pump serving as a turbine and a magnetic powder brake; the magnetic powder brake is characterized in that the slow releaser is provided with an air inlet, a liquid inlet and an output port, the air inlet of the slow releaser is communicated with an external air source, the liquid inlet of the slow releaser is communicated with an external liquid source, the output port of the slow releaser is communicated with the inlet of the gas-liquid mixed delivery pump, the outlet of the gas-liquid mixed delivery pump is communicated with the inlet of the pump serving as a turbine, and the magnetic powder brake is connected with the output shaft of the pump serving as the turbine.
2. The gas-liquid two-phase pump turbine experiment table as claimed in claim 1, wherein a gas-liquid flow meter is further provided, and the gas-liquid flow meter is located between the output port of the slow release device and the inlet of the gas-liquid mixed delivery pump.
3. The gas-liquid two-phase pump turbine experiment table as claimed in claim 1, wherein a gas phase flow meter is arranged at a gas inlet of the slow release device, and a liquid phase flow meter is arranged at a liquid inlet of the slow release device.
4. The gas-liquid two-phase pump turbine experiment table as claimed in any one of claims 1 to 3, wherein the gas-liquid two-phase pump turbine experiment table is further provided with a low-pressure gas-liquid separation tank; the low-pressure gas-liquid separation tank is internally provided with a liquid phase area and a gas phase area, the gas phase area of the low-pressure gas-liquid separation tank is provided with gas and is communicated with the gas inlet of the slow-release device through a first gas phase pipeline, and the liquid phase area of the low-pressure gas-liquid separation tank is provided with liquid and is communicated with the liquid inlet of the slow-release device through a first liquid phase pipeline.
5. The gas-liquid two-phase pump turbine test bench according to claim 4, wherein an air compressor is further provided, and the air compressor is communicated with the gas phase zone of the low-pressure gas-liquid separation tank.
6. The gas-liquid two-phase pump turbine test bench as claimed in claim 4, wherein the gas-liquid two-phase pump turbine test bench is further provided with a high-pressure gas-liquid separation tank, and the high-pressure gas-liquid separation tank is internally provided with a liquid phase region and a gas phase region; the inlet of the high-pressure gas-liquid separation tank is communicated with the outlet of the pump serving as a turbine, the gas phase area of the high-pressure gas-liquid separation tank is communicated with the gas phase area of the low-pressure gas-liquid separation tank through a second gas phase pipeline, and the liquid phase area of the high-pressure gas-liquid separation tank is communicated with the liquid phase area of the low-pressure gas-liquid separation tank through a second liquid phase pipeline.
7. The gas-liquid two-phase pump turbine experiment table as claimed in any one of claims 1 to 3, wherein the gas-liquid two-phase pump turbine experiment table is provided with a variable frequency motor, and an output shaft of the variable frequency motor is connected with the gas-liquid mixed delivery pump.
8. The gas-liquid two-phase pump turbine experiment table as recited in claim 7, wherein a rotation speed and torque measuring instrument is provided for the gas-liquid two-phase pump turbine experiment table, and the rotation speed and torque measuring instrument is located at a connection position of the variable frequency motor and the gas-liquid mixed transportation pump, and is used for obtaining rotation speed and torque of the gas-liquid mixed transportation pump.
9. The gas-liquid two-phase pump turbine laboratory bench according to any one of claims 1 to 3, wherein the casing of the pump turbine and the pipelines connected to the inlet and the outlet of the pump turbine are made of transparent materials.
10. The gas-liquid two-phase pump turbine experiment table as claimed in claim 9, wherein the casing of the pump turbine and the pipelines connected with the inlet and the outlet of the pump turbine are made of organic glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120973922.6U CN215865757U (en) | 2021-05-08 | 2021-05-08 | Gas-liquid two-phase pump as turbine experiment table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120973922.6U CN215865757U (en) | 2021-05-08 | 2021-05-08 | Gas-liquid two-phase pump as turbine experiment table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215865757U true CN215865757U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120973922.6U Expired - Fee Related CN215865757U (en) | 2021-05-08 | 2021-05-08 | Gas-liquid two-phase pump as turbine experiment table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215865757U (en) |
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2021
- 2021-05-08 CN CN202120973922.6U patent/CN215865757U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220218 |