CN103512738A - Low-temperature hydraulic turbine closed type experimental system and test method - Google Patents
Low-temperature hydraulic turbine closed type experimental system and test method Download PDFInfo
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Abstract
The invention discloses a low-temperature hydraulic turbine closed type experimental system and a test method. Liquefied gas in a liquefied gas storage tank of the system passes through a pipeline, is pressurized by a low temperature pump, and enters a hydraulic turbine all the way through the pipeline. The liquefied gas throttled and decompressed in the hydraulic turbine returns to the liquefied gas storage tank through a pipeline, another path of liquefied gas enters a vaporizer and is led into a shaft seal cavity of the hydraulic turbine through a pipeline to serve as seal gas of the hydraulic turbine. The hydraulic turbine is connected with a dynamometer through a coupler, and an oil station is connected with the hydraulic turbine through an oil pipe.
Description
Technical field
The hydraulic recovery technical field that the invention belongs to the fields such as low-temperature liquefaction, cryogenic air separation, relates to a kind of experimental system and method for testing, especially a kind of low-temperature hydraulic turbine enclosed experimental system and method for testing.
Background technology
In large-scale energy-dissipating device, the recovery of industrial complementary energy is one of key measure of energy-saving and emission-reduction, has great social benefit and economic worth.Low-temperature hydraulic turbine is the substitute products of Jiao-soup body throttling valve in the high energy consumption low-temperature circulating devices such as sky divides, liquefied natural gas (LNG), it is when meeting the step-down of technological process needs, can effectively suppress vaporization, avoid the destruction of cavitation generation and the irreversible loss of highly pressurised liquid energy, and utilize the high-pressure energy generating of reclaiming, there is considerable economic benefit.
In published patent in recent years, what relate to low-temperature hydraulic turbine has " a kind of expansion machine rotor for highly pressurized liquid throttling ", a patent No. 200810150526.2; " a kind of liquid expander ", the patent No. is 200910023562.7; " radial-flow type hydraulic turbine Optimization Design ", the patent No. is 201110439235.7; " a kind of low-temperature hydraulic turbine ", the patent No. is 201110455237.5.Also have the disclosed latent liquid type hydraulic turbine for liquefied natural gas (LNG) step-down of Japanese Ebara company, its patent No. is US2006/0186671A1." a kind of expansion machine rotor for highly pressurized liquid throttling " discloses a kind of expansion machine rotor for highly pressurized liquid throttling, rotor adopts impeller cantilever horizontal structure, in order to solve the harsh requirement of existing liquid expander to rate-of flow and brake power generating machine, can adopt common generator, pump or fan braking, be applicable to the medium step-down of arbitrary size flow." a kind of liquid expander " discloses the full liquid expander of a kind of liquid throttling, can solve in the empty minute flow process of existing tradition and adopt the problems such as the loss of Jiao-Tang manometric head that throttling valve brings, cavitation damage." radial-flow type hydraulic turbine Optimization Design " discloses the complete machine Optimization Design of radial-flow type hydraulic turbine passage component, comprises the original shape Design and optimization method for designing of monobasic optimal design, passage component." a kind of low-temperature hydraulic turbine " discloses a kind of cryogenic high pressure liquid throttling hydraulic turbine, and in order to solve, existing low-temperature hydraulic turbine loss of refrigeration capacity is large, impeller outlet flow losses are large and the problem of complete machine structure location and installation difficulty.In addition, Ebara company discloses a kind of turbine rotor vertical latent liquid type low-temperature hydraulic turbine coaxial with generator amature.
In the technology application and product development of low-temperature hydraulic turbine, the test macro of low-temperature hydraulic turbine and method effect are great.But with regard to home and overseas scope, see, do not find the open source information of this respect.
Summary of the invention
The object of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of low-temperature hydraulic turbine enclosed experimental system and method for testing are provided.
The object of the invention is to be achieved through the following technical solutions:
This low-temperature hydraulic turbine enclosed experimental system, comprises liquefied gas tank stores, cryopump, carburetor, petrol station, hydraulic turbine and dynamometer; Liquefied gas in described liquefied gas tank stores is after piping and cryopump adherence pressure, one tunnel enters hydraulic turbine through pipeline, actuating medium as hydraulic turbine, in hydraulic turbine, by the liquefied gas after reducing pressure by regulating flow, by pipeline, returned in liquefied gas tank stores, the pipeline of separately leading up to enters carburetor, flash distillation is gas, introduces the shaft seal annular seal space of hydraulic turbine, as the blanket gas of hydraulic turbine by pipeline; Described hydraulic turbine is connected with dynamometer by shaft coupling; Described petrol station is connected with hydraulic turbine by oil pipe.
All wrap up with thermal insulation thermal insulation material in the outside of above-mentioned each pipeline.
Above-mentioned hydraulic turbine is placed in ice chest inner heat insulation.
Above-mentioned cryopump adopts variable frequency adjustment.
The bearing of above-mentioned hydraulic turbine uses forces oil system lubricated.
Above-mentioned petrol station is comprised of oil groove, oil pump, oil-piping and refrigeratory, and the lubricating oil after oil pump pressurization flows into the bearing of hydraulic turbine through oil pipe, and used lubricating oil is got back to oil groove through oil pipe, enters oil pump after cooling by oil cooler again.
Further, the outlet of above-mentioned liquefied gas tank stores is connected with the import of cryopump with the first valve by pipeline, and described low temperature delivery side of pump is divided into three tunnels, and the first via is connected to the high-pressure liquefaction gas import of low-temperature hydraulic turbine by pipeline, the 4th valve and flowmeter; The second tunnel is connected with the inlet pipeline of liquefied gas tank stores with the second valve by pipeline; Third Road is connected to the entrance of carburetor by pipeline and the 6th valve; The low pressure liquefied gas outlet of described low-temperature hydraulic turbine is connected with the inlet pipeline of liquefied gas tank stores with the 5th valve by pipeline, is provided with the 3rd valve, and is connected with relief valve by pipeline on the inlet pipeline of described liquefied gas tank stores; The outlet of described carburetor is connected to the shaft seal annular seal space entrance of hydraulic turbine by pipeline and the 7th valve.
The present invention has following beneficial effect:
1. low-temperature hydraulic turbine closed circulation system described in the invention and method of testing can complete the test job of low-temperature hydraulic turbine product or model machine.Compare with low-temperature liquefaction system with the industrial low-temperature space division system of existing complexity, described test macro and method of testing initial outlay cost are very low, and have operating cost few, be easy to the advantages such as realization.
2. test macro described in the invention and method have universality, and the scope of application is wider, can be used for the low-temperature hydraulic turbine test job of different medium, as liquid air hydraulic turbine, LNG hydraulic turbine, liquid hydrogen hydraulic turbine etc.
Accompanying drawing explanation
Fig. 1 is hydraulic turbine measurement system diagram of the present invention.
Wherein: 1 is liquefied gas tank stores; 2 is cryopump; 3 is carburetor; 4 is petrol station; 5 is hydraulic turbine; 6 is dynamometer; 7 is relief valve; 8 is flowmeter; 9 is ice chest.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Referring to Fig. 1, low-temperature hydraulic turbine enclosed experimental system of the present invention, comprises liquefied gas tank stores 1, cryopump 2, carburetor 3, petrol station 4, hydraulic turbine 5 and dynamometer 6; Liquefied gas in described liquefied gas tank stores 1 is after piping and cryopump 2 adherence pressures, one tunnel enters hydraulic turbine 5 through pipeline, as hydraulic turbine 5(Cryogenic Liquid Turbine) actuating medium, in hydraulic turbine 5, by the liquefied gas after reducing pressure by regulating flow, by pipeline, returned in liquefied gas tank stores 1, the pipeline of separately leading up to enters carburetor 3, flash distillation is gas, introduces the shaft seal annular seal space of hydraulic turbine 5, as the blanket gas of hydraulic turbine 5 by pipeline; Described hydraulic turbine 5 is connected with dynamometer 6 by shaft coupling; Described petrol station 4 is connected with hydraulic turbine 5 by oil pipe.Physical relationship of the present invention is as follows:
The outlet of liquefied gas tank stores 1 is connected with the import of cryopump 2 with the first valve A by pipeline, and the outlet of described cryopump 2 is divided into three tunnels, and the first via is connected to the high-pressure liquefaction gas import of low-temperature hydraulic turbine 5 by pipeline, the 4th valve D and flowmeter 8; The second tunnel is connected with the inlet pipeline of liquefied gas tank stores 1 with the second valve B by pipeline; Third Road is connected to the entrance of carburetor 3 by pipeline and the 6th valve F; The low pressure liquefied gas outlet of described low-temperature hydraulic turbine 5 is connected with the inlet pipeline of liquefied gas tank stores 1 with the 5th valve E by pipeline, is provided with the 3rd valve C, and is connected with relief valve 7 by pipeline on the inlet pipeline of described liquefied gas tank stores 1; The outlet of described carburetor 3 is connected to the shaft seal annular seal space entrance of hydraulic turbine 5 by pipeline and the 7th valve G.
In most preferred embodiment of the present invention, all wrap up with thermal insulation thermal insulation material in the outside of above each pipeline.Hydraulic turbine 5 is placed in ice chest inner heat insulation.Cryopump adopts variable frequency adjustment.The bearing of hydraulic turbine 5 uses forces oil system lubricated.Petrol station 4 is comprised of oil groove, oil pump, oil-piping and refrigeratory, and the lubricating oil after oil pump pressurization flows into the bearing of hydraulic turbine 5 through oil pipe, and used lubricating oil is got back to oil groove through oil pipe, enters oil pump after cooling by oil cooler again.
The method of testing of above low-temperature hydraulic turbine enclosed experimental system, comprises the following steps:
1) to cryopump 2, carry out cooling;
Before carrying out test, system need to be carried out to precooling.Precooling is divided into two steps: cooling the and hydraulic turbine of cryopump is cooling.
First and second is opened with three valve A, B and C, and fourth, fifth and six valve D, E and F close, and as shown in Figure 1, form a closed circuit for cooling cryopump 2; In this process, a small amount of liquefied gas is evaporated to gas, and these a small amount of gases are discharged in atmosphere by relief valve 7;
2) hydraulic turbine 5 is cooling;
After cooling the completing of the cryopump of step 1), the second valve B is closed, the first valve A and the 3rd to seven valve C-G all open; Wherein valve the 4th valve D and the 5th valve E are respectively used to regulate the inlet and outlet pressure of hydraulic turbine, and the 6th valve F and the 7th valve G are for controlling the import and export flow of carburetor 3; All parts in this cooling stage Zhong，Ge loop are all in running status; The oil pump of petrol station 4 maintains the circulation of lubricating oil;
3) test
In the complete ，Qie Ge of whole enclosed pilot system precooling loop all parts stable after, just can start the test experiments of described hydraulic turbine.Test job mainly comprises tests the adjusting of operating point and the collection of experimental data, and they are realized by following method.
(1) adjusting of operating point
The adjusting of operating mode mainly comprises the adjusting of the adjusting of hydraulic turbine inlet and outlet pressure, the adjusting of hydraulic turbine flow and hydraulic turbine rotating speed:
The adjusting of inlet and outlet pressure: mainly by regulating the 4th valve D and the 5th valve E to complete, and the 3rd valve D is as auxiliary adjustment.
The adjusting of hydraulic turbine flow: obtain required flow by changing the aperture of the adjustable nozzle of hydraulic turbine, need the 4th valve D and the 5th valve E that regulate hydraulic turbine to import and export to complete in the adjustment process of this flow simultaneously.
The rotational speed regulation of hydraulic turbine: control and realize by it by the indication rotating speed of dynamometer 6 is set.
The collection of test figure completes by test platform, and the measuring point of pressure and temperature is arranged as shown in FIG., had 8 temperature points and 6 pressure-measuring-points.
The measuring point of temperature has 8, is respectively used to monitor out temperature, bearing bush temperature, the lubricating oil temperature of hydraulic turbine, in Fig. 1, is expressed as T1, T2, T3, T4, T5, T6, T7, and T8.Pressure-measuring-point has 6, is respectively used to monitor the inlet and outlet pressure of hydraulic turbine, pressure and the blanket gas pressure of impeller front and back side clearance.In Fig. 1, be expressed as P1, P2, P3, P4, P5 and P6.
Press force measurement can adopt pressure unit or tensimeter to complete.The measurement of temperature adopts platinum resistance to complete.The measurement of flow can adopt vortex shedding flow meter or orifice flowmeter to complete.Dynamometer 6 is for braking hydraulic turbine, and the measurement of rotating speed and moment of torsion simultaneously adopts dynamometer 6 to complete.The data that gather are summarized in the integrated demonstration of terminal by data acquisition system (DAS), realize the dynamic monitoring of hydraulic turbine data.
Under test operating mode, when hydraulic turbine and test macro thereof enter after steady operational status, i.e. recorded data.The experimental datas such as the hydraulic turbine inlet and outlet pressure that utilization obtains and temperature, flow, moment of torsion, rotating speed, can assess the performance of liquid turbine, complete the test job of described hydraulic turbine.
Claims (7)
1. a low-temperature hydraulic turbine enclosed experimental system, is characterized in that, comprises liquefied gas tank stores (1), cryopump (2), carburetor (3), petrol station (4), low-temperature hydraulic turbine (5), dynamometer (6); Liquefied gas in described liquefied gas tank stores (1) is after piping and cryopump (2) adherence pressure, one tunnel enters hydraulic turbine (5) through pipeline, actuating medium as hydraulic turbine (5), in hydraulic turbine (5), by the liquefied gas after reducing pressure by regulating flow, by pipeline, returned in liquefied gas tank stores (1), the pipeline of separately leading up to enters carburetor (3), flash distillation is gas, introduces the shaft seal annular seal space of hydraulic turbine (5), as the blanket gas of hydraulic turbine (5) by pipeline; Described hydraulic turbine (5) is connected with dynamometer (6) by shaft coupling; Described petrol station (4) is connected with hydraulic turbine (5) by oil pipe.
2. low-temperature hydraulic turbine enclosed experimental system according to claim 1, is characterized in that, all wrap up with thermal insulation thermal insulation material in the outside of described each pipeline.
3. low-temperature hydraulic turbine enclosed experimental system according to claim 1, is characterized in that, described cryopump adopts variable frequency adjustment.
4. low-temperature hydraulic turbine enclosed experimental system according to claim 1, is characterized in that, the bearing of described hydraulic turbine (5) uses forces oil system lubricated.
5. according to the low-temperature hydraulic turbine enclosed experimental system described in claim 1 or 4, it is characterized in that, described petrol station (4) is comprised of oil groove, oil pump, oil-piping and refrigeratory, lubricating oil after oil pump pressurization flows into the bearing of hydraulic turbine (5) through oil pipe, used lubricating oil is got back to oil groove through oil pipe, enters oil pump after cooling by oil cooler again.
6. low-temperature hydraulic turbine enclosed experimental system according to claim 1, it is characterized in that, the outlet of described liquefied gas tank stores (1) is connected with the import of cryopump (2) with the first valve (A) by pipeline, the outlet of described cryopump (2) is divided into three tunnels, and the first via is connected to the high-pressure liquefaction gas import of low-temperature hydraulic turbine (5) by pipeline, the 4th valve (D) and flowmeter (8); The second tunnel is connected with the inlet pipeline of liquefied gas tank stores (1) with the second valve (B) by pipeline; Third Road is connected to the entrance of carburetor (3) by pipeline and the 6th valve (F); The low pressure liquefied gas outlet of described low-temperature hydraulic turbine (5) is connected with the inlet pipeline of liquefied gas tank stores (1) with the 5th valve (E) by pipeline, on the inlet pipeline of described liquefied gas tank stores (1), be provided with the 3rd valve (C), and be connected with relief valve (7) by pipeline; The outlet of described carburetor (3) is connected to the shaft seal annular seal space entrance of hydraulic turbine (5) by pipeline and the 7th valve (G).
7. a method of testing for low-temperature hydraulic turbine enclosed experimental system, is characterized in that, comprises the following steps:
1) to cryopump (2), carry out cooling;
First and second and three valves (A, B and C) are opened, and fourth, fifth and six valves (D, E and F) are closed; Form a closed circuit for cooling cryopump (2); In this process, a small amount of liquefied gas is evaporated to gas, and these a small amount of gases are discharged in atmosphere by relief valve (7);
2) hydraulic turbine (5) is cooling;
After cooling the completing of the cryopump of step 1), the second valve (B) to be closed, the first valve (A) and the 3rd to seven valves (C-G) are all opened; Wherein valve the 4th valve (D) and the 5th valve (E) are respectively used to regulate the inlet and outlet pressure of hydraulic turbine, and the 6th valve (F) and the 7th valve (G) are for controlling the import and export flow of carburetor (3); All parts in this cooling stage Zhong，Ge loop are all in running status; The oil pump of petrol station (4) maintains the circulation of lubricating oil;
3) test
Comprise and test the adjusting of operating point and the collection of experimental data:
(1) adjusting of operating point
Comprise the adjusting of the adjusting of hydraulic turbine inlet and outlet pressure, the adjusting of hydraulic turbine flow and hydraulic turbine rotating speed:
The adjusting of inlet and outlet pressure: by regulating the 4th valve (D) and the 5th valve (E) to complete, and the 3rd valve (D) is as auxiliary adjustment;
The adjusting of hydraulic turbine flow: obtain required flow by changing the aperture of the adjustable nozzle of hydraulic turbine, need the 4th valve (D) and the 5th valve (E) that regulate hydraulic turbine to import and export to complete in the adjustment process of this flow simultaneously;
The rotational speed regulation of hydraulic turbine: control and realize by it by the indication rotating speed of dynamometer (6) is set;
(2) collection of experimental data
Gather pressure and temperature data, in the measuring point of pressure and temperature is arranged, have 8 temperature points and 6 pressure-measuring-points; Press force measurement to adopt pressure unit or tensimeter to complete; The measurement of temperature adopts platinum resistance to complete; The measurement of flow adopts vortex shedding flow meter or orifice flowmeter to complete; The measurement of rotating speed and moment of torsion adopts dynamometer (6) to complete; The data that gather are summarized in the integrated demonstration of terminal by data acquisition system (DAS), realize the dynamic monitoring of hydraulic turbine data.
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| CN201310432913.6A CN103512738B (en) | 2013-09-23 | 2013-09-23 | Low-temperature hydraulic turbine closed type experimental system and test method |
| PCT/CN2014/074902 WO2015039428A1 (en) | 2013-09-23 | 2014-04-08 | Closed experiment system and test method for low-temperature hydraulic turbine |
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| CN103758744A (en) * | 2014-02-24 | 2014-04-30 | 大连深蓝泵业有限公司 | Novel cryogenic pump test stand |
| WO2015039428A1 (en) * | 2013-09-23 | 2015-03-26 | 西安交通大学 | Closed experiment system and test method for low-temperature hydraulic turbine |
| CN104865043A (en) * | 2015-05-07 | 2015-08-26 | 中国石油大学(华东) | Liquefied natural gas (LNG) low-temperature flowing characteristic experimental device |
| CN104931248A (en) * | 2015-06-23 | 2015-09-23 | 江苏大学 | High-pressure waste energy recovery hydraulic turbine test stand and control method thereof |
| CN105937415A (en) * | 2016-06-08 | 2016-09-14 | 西安交通大学 | Supercritical carbon dioxide turbine device capable of adapting to large-range back pressure and flow |
| CN106226089A (en) * | 2016-07-28 | 2016-12-14 | 上海发电设备成套设计研究院 | The expansion ratios such as Quan Wen rotate turbine flowing cooling test device and Parameters design |
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| CN107702431A (en) * | 2017-11-01 | 2018-02-16 | 西安交通大学 | A kind of cryogenic liquid expanding machine thermal starting system and method |
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| CN103758744A (en) * | 2014-02-24 | 2014-04-30 | 大连深蓝泵业有限公司 | Novel cryogenic pump test stand |
| CN104865043A (en) * | 2015-05-07 | 2015-08-26 | 中国石油大学(华东) | Liquefied natural gas (LNG) low-temperature flowing characteristic experimental device |
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| CN106226089A (en) * | 2016-07-28 | 2016-12-14 | 上海发电设备成套设计研究院 | The expansion ratios such as Quan Wen rotate turbine flowing cooling test device and Parameters design |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103512738B (en) | 2015-04-29 |
| WO2015039428A1 (en) | 2015-03-26 |
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