CN103512738B - 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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- CN103512738B CN103512738B CN201310432913.6A CN201310432913A CN103512738B CN 103512738 B CN103512738 B CN 103512738B CN 201310432913 A CN201310432913 A CN 201310432913A CN 103512738 B CN103512738 B CN 103512738B
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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 invention belongs to the hydraulic recovery technical field in the field such as low-temperature liquefaction, cryogenic air separation, relate 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 choke valve in the high energy consumption low-temperature circulating devices such as sky divides, liquefied natural gas, it is while meeting the step-down of technological process needs, effectively can suppress vaporization, the irreversible loss of the destruction avoiding cavitation to produce and 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 ", the patent No. 200810150526.2; " a kind of liquid expander ", the patent No. is 200910023562.7; " optimization design method of radial-flow-type hydraulic turbine ", 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 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 rigors of existing liquid expander to rate-of flow and brake power generating machine, common generator, pump or fan can be adopted to brake, 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 point flow process of existing tradition and adopt the problems such as the loss of Jiao-Tang head that choke valve brings, cavitation damage." optimization design method of radial-flow-type hydraulic turbine " 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 unitary 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 comparatively 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, test macro and the method effect of low-temperature hydraulic turbine are great.But see with regard to home and overseas scope, do not find the open source information of this respect.
Summary of the invention
The object of the invention is to the shortcoming overcoming 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 storage tank, cryogenic pump, vaporizer, petrol station, hydraulic turbine and dynamometer; Liquefied gas in described liquefied gas storage tank is after piping and cryogenic pump adherence pressure, one tunnel enters hydraulic turbine through pipeline, as the working media of hydraulic turbine, returned in liquefied gas storage tank by the liquefied gas after reducing pressure by regulating flow by pipeline in hydraulic turbine, pipeline of separately leading up to enters vaporizer, flash distillation is gas, is introduced 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.
The outside of above-mentioned each pipeline is all wrapped up with thermal insulation heat-insulating material.
Above-mentioned hydraulic turbine is placed in ice chest inner heat insulation.
Above-mentioned cryogenic pump adopts variable frequency adjustment.
The bearing of above-mentioned hydraulic turbine uses forces oil system lubrication.
Above-mentioned petrol station is made up of oil groove, oil pump, oil-piping and cooler, and the lubricating oil after oil pump pressurization flows into the bearing of hydraulic turbine through oil pipe, used lubricating oil gets back to oil groove through oil pipe, again enters oil pump after being cooled by oil cooler.
Further, the outlet of above-mentioned liquefied gas storage tank is connected with the import of cryogenic pump 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; Second tunnel is connected with the inlet pipeline of the second valve with liquefied gas storage tank by pipeline; 3rd tunnel is connected to the entrance of vaporizer 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 storage tank with the 5th valve by pipeline, the inlet pipeline of described liquefied gas storage tank is provided with the 3rd valve, and is connected with relief valve by pipeline; The outlet of described vaporizer 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 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 comparatively wide, 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 storage tank; 2 is cryogenic pump; 3 is vaporizer; 4 is petrol station; 5 is hydraulic turbine; 6 is dynamometer; 7 is relief valve; 8 is flowmeter; 9 is ice chest.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
See Fig. 1, low-temperature hydraulic turbine enclosed experimental system of the present invention, comprises liquefied gas storage tank 1, cryogenic pump 2, vaporizer 3, petrol station 4, hydraulic turbine 5 and dynamometer 6; Liquefied gas in described liquefied gas storage tank 1 is after piping and cryogenic pump 2 adherence pressure, one tunnel enters hydraulic turbine 5 through pipeline, as hydraulic turbine 5(Cryogenic Liquid Turbine) working media, returned in liquefied gas storage tank 1 by the liquefied gas after reducing pressure by regulating flow by pipeline in hydraulic turbine 5, pipeline of separately leading up to enters vaporizer 3, flash distillation is gas, is introduced 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 storage tank 1 is connected with the import of cryogenic pump 2 with the first valve A by pipeline, and the outlet of described cryogenic pump 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; Second tunnel is connected with the inlet pipeline of liquefied gas storage tank 1 with the second valve B by pipeline; 3rd tunnel is connected to the entrance of vaporizer 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 storage tank 1 with the 5th valve E by pipeline, the inlet pipeline of described liquefied gas storage tank 1 is provided with the 3rd valve C, and is connected with relief valve 7 by pipeline; The outlet of described vaporizer 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, the outside of above each pipeline is all wrapped up with thermal insulation heat-insulating material.Hydraulic turbine 5 is placed in ice chest inner heat insulation.Cryogenic pump adopts variable frequency adjustment.The bearing of hydraulic turbine 5 uses forces oil system lubrication.Petrol station 4 is made up of oil groove, oil pump, oil-piping and cooler, and the lubricating oil after oil pump pressurization flows into the bearing of hydraulic turbine 5 through oil pipe, used lubricating oil gets back to oil groove through oil pipe, again enters oil pump after being cooled by oil cooler.
The method of testing of above low-temperature hydraulic turbine enclosed experimental system, comprises the following steps:
1) cryogenic pump 2 is cooled;
Before carrying out test, need system to carry out precooling.Precooling is divided into two steps: i.e. the cooling of cryogenic pump and the cooling of hydraulic turbine.
First and second and three valve A, B and C are opened, and fourth, fifth and six valve D, E and F close, as shown in Figure 1, form a closed circuit for cooling cryogenic pump 2; In the process, a small amount of liquefied gas is evaporated to gas, and these a small amount of gases are discharged in air by relief valve 7;
2) cooling of hydraulic turbine 5;
After the cooling of the cryogenic pump of step 1) completes, closed by the second valve B, the first valve A and the three to seven valve C-G all opens; Wherein valve the 4th valve D and the 5th valve E is respectively used to the inlet and outlet pressure regulating hydraulic turbine, and the 6th valve F and the 7th valve G is for controlling the import and export flow of vaporizer 3; In this cooling stage, all parts in each loop are all in running status; The oil pump of petrol station 4 maintains the circulation of lubricating oil;
3) test
When the precooling of whole enclosed pilot system is complete, and in each loop all parts stable after, just can start the test experiments of described hydraulic turbine.Test job mainly comprises the adjustment of measurement condition point and the collection of experimental data, and they are realized by following method.
(1) adjustment of operating point
The adjustment of operating mode mainly comprises the adjustment of the adjustment of hydraulic turbine inlet and outlet pressure, the adjustment of hydraulic turbine flow and hydraulic turbine rotating speed:
The adjustment of inlet and outlet pressure: mainly through regulating the 4th valve D and the 5th valve E to come, and the 3rd valve D is as auxiliary adjustment.
The adjustment of hydraulic turbine flow: the flow needed for being obtained by the aperture changing the adjustable nozzle of hydraulic turbine, the 4th valve D needing simultaneously to regulate hydraulic turbine to import and export in the adjustment process of this flow and the 5th valve E has come.
The rotational speed regulation of hydraulic turbine: by arranging the instruction rotating speed of dynamometer 6 by its control realization.
The collection of test data has been come by test platform, and the point layout of pressure and temperature as shown in FIG., has 8 temperature points and 6 pressure-measuring-points.
The measuring point of temperature has 8, is respectively used to out temperature, bearing bush temperature, the lubricating oil temperature of monitoring hydraulic turbine, in FIG, is expressed as T1, T2, T3, T4, T5, T6, T7, and T8.Pressure-measuring-point has 6, is respectively used to pressure and the blanket gas pressure of side clearance before and after the inlet and outlet pressure of monitoring hydraulic turbine, impeller.In FIG, be expressed as P1, P2, P3, P4, P5 and P6.
The measurement of pressure can adopt pressure transmitter or Pressure gauge to complete.The measurement of temperature adopts RTD to complete.The measurement of flow can adopt vortex-shedding 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.The data gathered are summarized in terminal integrative display by data collecting system, realize the dynamic monitoring of hydraulic turbine data.
Under measurement condition, after hydraulic turbine and test macro thereof enter 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 (4)
1. a low-temperature hydraulic turbine enclosed experimental system, it is characterized in that, comprise liquefied gas storage tank (1), cryogenic pump (2), vaporizer (3), petrol station (4), low-temperature hydraulic turbine (5), dynamometer (6); Liquefied gas in described liquefied gas storage tank (1) is after piping and cryogenic pump (2) adherence pressure, one tunnel enters hydraulic turbine (5) through pipeline, as the working media of hydraulic turbine (5), returned in liquefied gas storage tank (1) by the liquefied gas after reducing pressure by regulating flow by pipeline in hydraulic turbine (5), pipeline of separately leading up to enters vaporizer (3), flash distillation is gas, the shaft seal annular seal space of hydraulic turbine (5) is introduced, 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; The outside of described each pipeline is all wrapped up with thermal insulation heat-insulating material; Described cryogenic pump adopts variable frequency adjustment; The bearing of described hydraulic turbine (5) uses forces oil system lubrication.
2. low-temperature hydraulic turbine enclosed experimental system according to claim 1, it is characterized in that, described petrol station (4) is made up of oil groove, oil pump, oil-piping and cooler, lubricating oil after oil pump pressurization flows into the bearing of hydraulic turbine (5) through oil pipe, used lubricating oil gets back to oil groove through oil pipe, again enters oil pump after being cooled by oil cooler.
3. low-temperature hydraulic turbine enclosed experimental system according to claim 1, it is characterized in that, the outlet of described liquefied gas storage tank (1) is connected with the import of the first valve (A) with cryogenic pump (2) by pipeline, the outlet of described cryogenic pump (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); Second tunnel is connected with the inlet pipeline of the second valve (B) with liquefied gas storage tank (1) by pipeline; 3rd tunnel is connected to the entrance of vaporizer (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 storage tank (1) with the 5th valve (E) by pipeline, the inlet pipeline of described liquefied gas storage tank (1) is provided with the 3rd valve (C), and is connected with relief valve (7) by pipeline; The outlet of described vaporizer (3) is connected to the shaft seal annular seal space entrance of hydraulic turbine (5) by pipeline and the 7th valve (G).
4. a method of testing for low-temperature hydraulic turbine enclosed experimental system, is characterized in that, comprises the following steps:
1) cryogenic pump (2) is cooled;
First and second and three valves (A, B and C) are opened, and fourth, fifth and six valve (D, E and F) close; Form a closed circuit for cooling cryogenic pump (2); In the process, a small amount of liquefied gas is evaporated to gas, and these a small amount of gas is discharged in air by relief valve (7);
2) cooling of hydraulic turbine (5);
Until step 1) the cooling of cryogenic pump complete after, closed by the second valve (B), the first valve (A) and the three to seven valve (C-G) are all opened; Wherein valve the 4th valve (D) and the 5th valve (E) are respectively used to the inlet and outlet pressure regulating hydraulic turbine, and the 6th valve (F) and the 7th valve (G) are for controlling the import and export flow of vaporizer (3); In this cooling stage, all parts in each loop are all in running status; The oil pump of petrol station (4) maintains the circulation of lubricating oil;
3) test
Comprise the adjustment of measurement condition point and the collection of experimental data:
(1) adjustment of operating point
Comprise the adjustment of hydraulic turbine inlet and outlet pressure, the adjustment of hydraulic turbine flow and the adjustment of hydraulic turbine rotating speed:
The adjustment of inlet and outlet pressure: by regulating the 4th valve (D) and the 5th valve (E), and the 3rd valve (D) is as auxiliary adjustment;
The adjustment of hydraulic turbine flow: the flow needed for being obtained by the aperture changing the adjustable nozzle of hydraulic turbine, the 4th valve (D) needing simultaneously to regulate hydraulic turbine to import and export in the adjustment process of this flow and the 5th valve (E) have come;
The rotational speed regulation of hydraulic turbine: by arranging the instruction rotating speed of dynamometer (6) by its control realization;
(2) collection of experimental data
Gather pressure and temperature data, in the point layout of pressure and temperature, have 8 temperature points and 6 pressure-measuring-points; The measurement of pressure adopts pressure transmitter or Pressure gauge to complete; The measurement of temperature adopts RTD to complete; The measurement of flow adopts vortex-shedding meter or orifice flowmeter to complete; The measurement of rotating speed and moment of torsion adopts dynamometer (6); The data gathered are summarized in terminal integrative display by data collecting system, 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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| CN103512738B (en) * | 2013-09-23 | 2015-04-29 | 西安交通大学 | Low-temperature hydraulic turbine closed type experimental system and test method |
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Effective date of registration: 20210702 Address after: 712000 room 106, B1 / F, West Yungu phase I, Fengxi new town, Xixian New District, Xi'an City, Shaanxi Province Patentee after: Kaishan (Xi'an) Turbine Machinery Co.,Ltd. Address before: 710049 No. 28 West Xianning Road, Shaanxi, Xi'an Patentee before: XI'AN JIAOTONG University |