CN105715530A - Accelerated life test platform for water pump of converter valve cooling system and test method of accelerated life test platform - Google Patents
Accelerated life test platform for water pump of converter valve cooling system and test method of accelerated life test platform Download PDFInfo
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- CN105715530A CN105715530A CN201410735161.5A CN201410735161A CN105715530A CN 105715530 A CN105715530 A CN 105715530A CN 201410735161 A CN201410735161 A CN 201410735161A CN 105715530 A CN105715530 A CN 105715530A
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Abstract
The invention relates to an accelerated life test platform for a water pump of a converter valve cooling system and a test method of the accelerated life test platform. The test platform comprises a pressurizing system, a driving system and a temperature control system, wherein the pressurizing system, the driving system and the temperature control system are connected through a circulating pipeline, so that a closed loop is formed. A heat source device, a temperature measuring device, a pressure sensor, a booster pump and a programmable logic controller (PLC) variable-frequency device of the test platform are all connected with a central processing unit, and a command is given out through the central processing unit to achieve automatic control over the test platform. Through the test platform, an accelerated life test of a pressure acceleration factor, an accelerated life test of a rotating speed acceleration factor and an accelerated life test of a temperature acceleration factor can be achieved; the average life of the water pump under the normal stress level condition is extrapolated by means of the average life of the water pump under the accelerated stress level condition, so that the acceleration factors are determined, and evaluation of the performance of the water pump is achieved. The accelerated life test platform for the water pump of the converter valve cooling system and the test method of the accelerated life test platform have extremely important significance for shortening the research and development cycle and improving the reliability of the water pump, and reliable test data are accumulated for the research and development of high-performance, high-pressure and large-flow water pumps.
Description
Technical field
The present invention relates to the test platform of a kind of DC transmission system and test method thereof, in particular to a kind of converter valve cooling system water pump accelerated life test platform and test method thereof.
Background technology
The development of current power equipment product is maked rapid progress, and the life and reliability of product is had higher requirement.Along with the raising of the life and reliability of product, as continued to use traditional test method, then test period and test funds will substantial increases.Simultaneously because the high speed development of science and technology, the speed of model change is more and more fast, in the urgent need to obtaining the life information of product within a short period of time.Therefore it is necessary to study the method for new shortening test period to adapt to life of product and reliability ever increasing need.Accelerated life test is paid attention in this case just and is grown up.The research of accelerated life test receives extensive attention at reliability test engineering field.
Accelerated life test belongs to statistical test category.It is to carry out on the basis of reasonable engineering and statistical hypothesis, utilize the statistical model relevant to physical failure rule that the reliability information obtained under the acceleration environment beyond normal stress level is changed, obtain product a kind of test method of the reproducible Numerical value of reliability characteristic under specified stress level.In short, accelerated life test is when keeping failure mechanism constant, shorten a kind of life test method of test period by strengthening proof stress.Accelerated life test adopts accelerated stress level to carry out the life test of product, thus shortening test period, improve test efficiency, reducing experimentation cost.
In industries such as nuclear power, thermal power generation, D.C. high voltage transmissions, its capital equipment is provided with corresponding intelligent monitor system, to guarantee the security reliability of its operation.But the auxiliary equipment of water pump, blower fan etc is then rested essentially within make regular check on, lower stage of maintenance down and accident analysis afterwards; and large rotating machinery equipment mostly be have employed the overall monitor maintenance of " centered by reliability " by developed country; therefore, " weight main frame, light subsidiary engine；Heavily protection, gently analyze " thought can not meet the Effec-tive Function of modern enterprise, the fail-safe analysis for the subsidiary engine such as water pump, blower fan is also increasingly paid attention to by enterprise.
The current research having had scientific research personnel that the reliability of water pump has been correlated with at nuclear power and thermoelectricity field, but the research relevant at high-voltage dc transmission electrical domain is relatively fewer, and converter valve cooling system is the significant components of whole straight-flow system, its key components water pump is the power-equipment of converter valve cooling system, directly influences the reliability of cooling system.And water pump is as the plant equipment of a kind of high reliability, test method traditionally studies its reliability, not only loses time but also waste funds, therefore adopts the test method of accelerated aging to study and both shortens test period, improve again test efficiency, also reduce experimentation cost.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of converter valve cooling system water pump accelerated life test platform and test method thereof, the present invention utilizes water pump average life under accelerated stress level to remove extrapolation water pump average life under normal stress level according to accelerated aging curve, determine accelerated factor, it is achieved the assessment to pump performance.The reliability of shortening R&D cycle, raising water pump is extremely important, and the research and development for high-performance, high-pressure high-flow water pump accumulate reliable test data.
It is an object of the invention to adopt following technical proposals to realize:
The present invention provides a kind of accelerated life test platform for converter valve cooling system water pump, it thes improvement is that, described test platform includes pressure charging system, drive system and temperature control system, and described pressure charging system, drive system and temperature control system connect formation closed-loop path by circulating line；The heat power supply device of described temperature control system is all connected with central processing unit with the PLC converter plant of booster pump and drive system with temperature measuring equipment, the pressure transducer of pressure charging system, and sends instruction by central processing unit, it is achieved automatically controlling of test platform.
Further, described pressure charging system includes water tank, booster pump, pressure transducer and vacuum tank；Described water tank is connected by pipeline with booster pump；Described booster pump and vacuum tank are connected on circulating line, and described pressure transducer is symmetricly set on vacuum tank both sides；By booster pump, test platform is pressurizeed, and guarantee that test platform stable maintaining runs under setting pressure 1.2～1.5 times of properly functioning pressure (setting pressure be), it is achieved the accelerated life test of pressure accelerated factor；
Pipeline between circulating line and water tank and booster pump all adopts seamless steel pipe.
Further, described drive system includes the tested water pump and the PLC converter plant that are connected by pipeline, and described tested water pump is connected on circulating line；The rotating speed of tested water pump is changed, it is achieved the accelerated life test of rotating speed accelerated factor by changing the running frequency of tested pump motor.
Further, described PLC converter plant is PLC converter；Pipeline between tested water pump and PLC converter plant adopts seamless steel pipe.
Further, described temperature control system includes heat power supply device and temperature measuring equipment, described temperature measuring equipment is arranged on the two ends of heat power supply device, by heat power supply device, the medium temperature of test platform is heated up, and guarantee that (design temperature is 1,05～1.25 times of normal operating temperature to the stable design temperature that maintains of test platform, and temperature is absolute temperature, unit is K) under run, it is achieved the accelerated life test of Temperature Accelerating Factor in Life Test.
Further, described heat power supply device is the constant temperature heating device that PLC converter automatically controls, and by main circulation pump, forms equipped with the heating tank of four heaters, two surge tanks, nitrogen stabilization pressure tank, liquidometer, Pressure gauge, temperature sensor, pressure transducer and flow transducer；
Described main circulation pump, temperature sensor, pressure transducer, Pressure gauge and flow transducer are arranged on circulating line, (temperature sensor is included by above-mentioned instrument, pressure transducer, Pressure gauge and flow transducer) signal feedback, the control system of the test platform fluid operating parameter according to test requirements document, it is turned on and off the heater on heating tank, pressure and flow to converter valve cooling system are controlled simultaneously, the medium of heating tank is entered test device by pipeline by main circulation pump, heating tank it is recycled into again by the medium after test device, carry out continuous periodic duty.Surge tank is connected with major cycle pipeline by three-way valve, nitrogen stabilization pressure tank is in parallel with surge tank, and liquidometer is arranged on surge tank, during when major cycle pipeline medium because of a small amount of evaporation or filter loss, surge tank is pressed into major cycle pipeline medium, to keep the constant pressure of pipeline and being full of of medium；
Described temperature measuring equipment adopts temperature sensor.
Further, described pressure charging system, drive system and temperature control system are separate, carry out the accelerated life test of single stress or the accelerated life test of many stress.
The present invention also provides for the test method of a kind of converter valve cooling system water pump accelerated life test platform, it thes improvement is that, described test method includes the accelerated life test of the accelerated life test of pressure accelerated factor, the accelerated life test of rotating speed accelerated factor and Temperature Accelerating Factor in Life Test.
Further, guarantee that medium is full of the pipeline between circulating line, water tank and booster pump and the pipeline between tested water pump and PLC converter plant before the test.
Further, test platform is carried out supercharging until being added to tested pressure and stopping by the booster pump starting pressure charging system, booster pump is controlled by central processing unit, guarantee when the force value of test platform reduces 1% compared with tested force value, start booster pump supercharging, supercharging is stopped when the force value of test platform exceedes the 1% of tested force value, then pass through vacuum tank and unstable system pressure is stably maintained at tested force value 1.2～1.5 times of properly functioning pressure (tested force value be), it is achieved the accelerated life test of pressure accelerated factor；
The running frequency being changed tested pump motor by the PLC converter plant in drive system changes rotating speed, it is achieved the accelerated life test of rotating speed accelerated factor；
By heat power supply device, the medium in circulating line is heated, the heating-up temperature of heat power supply device is controlled by central processing unit, guarantee when beginning to warm up when the temperature value of test platform reduces 1K compared with dut temperature value, heating is stopped when the temperature value of test platform exceedes dut temperature value 1K, the temperature stabilization making test platform maintains dut temperature value, and (dut temperature value is the 1 of normal operating temperature, 05～1.25 times), it is achieved the accelerated life test of Temperature Accelerating Factor in Life Test.
Force value in test platform is connected with central processing unit by pressure transducer；Temperature value is connected with central processing unit by temperature sensor；The tachometer value of water pump is connected with central processing unit by speed probe, described pressure transducer, temperature sensor and speed probe gather and record the pressure of correspondence, temperature and pump rotary speed information respectively, and the information of collection is fed back on central processing unit, facilitate operator to be collected data arranging；
The control program of central processing unit arranges alarming value, when process of the test occurring, actual value exceedes warning value alarm and is automatically stopped test, to avoid the generation of danger；
The interface that described test platform is reserved is all rapid translating interface, and the water pump for different model realizes interface docking, so that test platform constantly to be transformed.
Compared with the prior art, the present invention reaches to provide the benefit that:
1) present invention utilizes water pump average life under accelerated stress level to remove extrapolation water pump average life under normal stress level according to accelerated aging curve, it is determined that accelerated factor, it is achieved the assessment to pump performance.The reliability of shortening R&D cycle, raising water pump is extremely important, and the research and development for high-performance, high-pressure high-flow water pump accumulate reliable test data.
2) sensitive components in test platform and sensor etc. are protected; by data wire by measurement point access system; and components and parts itself are fixed on outside system; thus achieve components and parts access from system and isolate; improve the service life of components and parts, reduce the fault rate in process of the test.
3) use computer that each control parts in test platform are controlled, utilize collection, recording equipment automatically that various signal messages are acquired, improve the automaticity of test platform.
4) it is provided with the warning device of necessity, when process of the test occurring, actual value exceedes warning value alarm and is automatically stopped test, it is to avoid dangerous generation, improves the degree of protection to test platform.
5) test platform reserves various interface, conveniently platform is transformed, to facilitate the pump to various different models to be accelerated life test, extends the scope of application of platform, improve the versatility of test platform.
6) test platform pipeline all adopts seamless steel pipe, it is therefore prevented that the high-potting destruction to pipeline.
Accompanying drawing explanation
Fig. 1 is converter valve cooling system water pump accelerated life test platform structure schematic diagram provided by the invention, wherein: 1. heat power supply device；2. water tank；3.PLC converter plant；4. temperature sensor；5. pressure transducer；6. booster pump；7. vacuum tank；8. tested water pump；A. pressure charging system；B. drive system；C. temperature control system；D. central processing unit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Direct current transmission converter valve cooling system, including major cycle water pump, heating tank, air radiator, main filter, converter valve and degassing tank；Described major cycle exit of pump, heating tank, air radiator, main filter, converter valve, degassing tank and major cycle unit fixed on water pump suction are connected in turn formation closed circuit by pipeline.
Described direct current transmission converter valve cooling system includes water treatment loop, described water treatment loop includes ion exchanger and accurate filter, described water treatment loop is in parallel with converter valve, and described ion exchanger is connected with accurate filter, and described ion exchanger and accurate filter are equipped with standby.
Described direct current transmission converter valve cooling system includes nitrogen stabilization pressure system, and described nitrogen stabilization pressure system includes expansion drum and nitrogen cylinder, and expansion drum is connected with accurate filter, and nitrogen cylinder expansion drum connects, and described expansion drum is two series connection, and nitrogen cylinder is provided with standby.Direct current transmission converter valve cooling system includes automatic water replenishing system, described automatic water replenishing system includes the raw water pump, moisturizing filter, former water pot, small pump and the moisturizing electrodynamic valve that are sequentially connected with, moisturizing electrodynamic valve is connected with ion exchanger, and described small pump is provided with standby.Heating tank includes at least one electric heater.Degassing tank includes at least one electric heater.
Direct current transmission converter valve cooling system includes electric T-shaped valve, butterfly valve and ball valve, electric T-shaped valve is in parallel in ball valve after connecting with butterfly valve, being connected between heating tank and major cycle water pump, electric T-shaped valve the 3rd end is connected with main filter inlet, and described butterfly valve and electric T-shaped valve are equipped with standby.
Major cycle water pump, heating tank and main filter are equipped with standby.Converter valve and degassing tank are provided with virtue road.Water treatment loop and conductivity measurement branch circuit parallel connection.
The present invention provides a kind of test platform for converter valve cooling system water pump many stress accelerated life test, it is possible to realize the accelerated life test of pressure, rotating speed and three kinds of accelerated factors of temperature.
Test platform is made up of pressure charging system A, drive system B and temperature control system C tri-part.Three subsystems are separate, non-interference, can isolated operation, also can run simultaneously, they are connected by circulating line, form the closed circuit of a Guan Bi, and the heat power supply device 1 in system, PLC converter plant 3, temperature sensor 4, pressure transducer 5, booster pump 6 are all connected with central processing unit D, instruction is sent, it is achieved automatically controlling of system by central processing unit D.
As it is shown in figure 1, be converter valve cooling system water pump accelerated life test platform structure schematic diagram provided by the invention, pressure charging system A is made up of water tank 2, booster pump 6, pressure transducer 5 and vacuum tank 7, and described water tank is connected by pipeline with booster pump；Described booster pump and vacuum tank are connected on circulating line, and described pressure transducer is symmetricly set on vacuum tank both sides；The purpose arranging pressure charging system A is by booster pump, system to be pressurizeed, and guarantees that maintaining of system stability is run under setting pressure, it is achieved the accelerated life test of pressure accelerated factor.Pipeline between circulating line and water tank and booster pump all adopts seamless steel pipe.
Drive system B includes the tested water pump 8 and the PLC converter plant 3 that are connected by pipeline, and described tested water pump 8 is connected on circulating line；The rotating speed of tested water pump is changed, it is achieved the accelerated life test of rotating speed accelerated factor by changing the running frequency of tested water pump 8 motor.PLC converter plant 3 is PLC converter；Pipeline between tested water pump 8 and PLC converter plant 3 adopts seamless steel pipe, and the purpose arranging drive system B is to change the rotating speed of water pump by changing the running frequency of pump motor, it is achieved the accelerated life test of rotating speed accelerated factor.
Temperature control system C includes heat power supply device and temperature measuring equipment, described temperature measuring equipment is arranged on the two ends of heat power supply device, the purpose arranging temperature control system C is by heat power supply device, the medium temperature of whole system to be heated up, and guarantee that the maintenance of system stability runs at a set temperature, it is achieved the accelerated life test of Temperature Accelerating Factor in Life Test.Heat power supply device is the constant temperature heating device that PLC converter automatically controls, and temperature measuring equipment is temperature sensor.
By water pump accelerated life test platform is designed, key sensor and key components are taken special protective measure and design, reduce the various accelerated stress impact on its impact in process of the test.Use industrial computer that the components and parts of whole test platform are carried out Automatic Control and collection, the various state values of platform interior in process of the test are monitored and report to the police, improves the degree of protection to test platform.Test platform reserves various interface, conveniently platform is transformed, to facilitate the pump to various different models to be accelerated life test, extends the scope of application of platform.
In the design process the key components in test platform and sensor etc. are protected, crucial components and parts are accessed from system and isolate, improves the service life of components and parts, reduce the fault rate in process of the test；Use computer that each control parts in test platform are controlled, utilize collection, recording equipment automatically that various signal messages are acquired, improve the automaticity of test platform；It is provided with the warning device of necessity, when process of the test occurring, actual value exceedes warning value alarm and is automatically stopped test, it is to avoid dangerous generation；In the design process, it is considered to the operation principle of various pumps and working forms, improve the versatility of test platform.
The present invention also provides for the test method of a kind of converter valve cooling system water pump accelerated life test platform, when being accelerated life test, testing position will be arranged on by pump testing, and make whole test platform form the closed circuit of a Guan Bi, before test, guarantee that medium is full of whole pipeline.Start booster pump and whole system is carried out supercharging until being added to tested pressure and stopping, booster pump is controlled by central processing unit, guarantee the startup booster pump supercharging when system pressure is lower than a certain force value, supercharging is stopped when arriving a certain force value, then pass through vacuum tank and unstable pressure stability is maintained tested force value 1.2～1.5 times of properly functioning pressure (tested force value be), it is achieved the accelerated life test of pressure accelerated factor.Rotating speed is changed to by the motor of pump testing by Frequency, it is achieved the accelerated life test of rotating speed accelerated factor by PLC converter plant.By heat power supply device, medium is heated, the heating-up temperature controlling heat power supply device is processed by central authorities, guarantee to heat when system temperature is lower than a certain temperature value, heating is stopped when arriving a certain temperature value, (dut temperature value is the 1 of normal operating temperature to make whole system be stably maintained at dut temperature value, 05～1.25 times) left and right, it is achieved the accelerated life test of Temperature Accelerating Factor in Life Test.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit; although the present invention being described in detail with reference to above-described embodiment; the specific embodiment of the present invention still can be modified or equivalent replacement by those of ordinary skill in the field; these are without departing from any amendment of spirit and scope of the invention or equivalent replace, within the claims of the present invention all awaited the reply in application.
Claims (10)
1. the accelerated life test platform for converter valve cooling system water pump, it is characterized in that, described test platform includes pressure charging system, drive system and temperature control system, and described pressure charging system, drive system and temperature control system connect formation closed-loop path by circulating line；The heat power supply device of described temperature control system is all connected with central processing unit with the PLC converter plant of booster pump and drive system with temperature measuring equipment, the pressure transducer of pressure charging system, and sends instruction by central processing unit, it is achieved automatically controlling of test platform.
2. test platform as claimed in claim 1, it is characterised in that described pressure charging system includes water tank, booster pump, pressure transducer and vacuum tank；Described water tank is connected by pipeline with booster pump；Described booster pump and vacuum tank are connected on circulating line, and described pressure transducer is symmetricly set on vacuum tank both sides；By booster pump, test platform is pressurizeed, and guarantee that test platform stable maintaining runs under setting pressure, it is achieved the accelerated life test of pressure accelerated factor；
Pipeline between circulating line and water tank and booster pump all adopts seamless steel pipe.
3. test platform as claimed in claim 1, it is characterised in that described drive system includes the tested water pump and the PLC converter plant that are connected by pipeline, and described tested water pump is connected on circulating line；The rotating speed of tested water pump is changed, it is achieved the accelerated life test of rotating speed accelerated factor by changing the running frequency of tested pump motor.
4. test platform as claimed in claim 3, it is characterised in that described PLC converter plant is PLC converter；Pipeline between tested water pump and PLC converter plant adopts seamless steel pipe.
5. test platform as claimed in claim 1, it is characterized in that, described temperature control system includes heat power supply device and temperature measuring equipment, described temperature measuring equipment is arranged on the two ends of heat power supply device, by heat power supply device, the medium temperature of test platform is heated up, and guarantee that the stable maintenance of test platform runs at a set temperature, it is achieved the accelerated life test of Temperature Accelerating Factor in Life Test.
6. test platform as claimed in claim 1, it is characterized in that, described heat power supply device is the constant temperature heating device that PLC converter automatically controls, and by main circulation pump, forms equipped with the heating tank of four heaters, two surge tanks, nitrogen stabilization pressure tank, liquidometer, Pressure gauge, temperature sensor, pressure transducer and flow transducer；
Described main circulation pump, temperature sensor, pressure transducer, Pressure gauge and flow transducer are arranged on circulating line, and surge tank is connected with circulating line by three-way valve, and nitrogen stabilization pressure tank is in parallel with surge tank, and liquidometer is arranged on surge tank；
Described temperature measuring equipment adopts temperature sensor.
7. test platform as claimed in claim 1, it is characterised in that described pressure charging system, drive system and temperature control system are separate, carry out the accelerated life test of single stress or the accelerated life test of many stress.
8. the test method of the converter valve cooling system water pump accelerated life test platform as according to any one of claim 1-7, it is characterized in that, described test method includes the accelerated life test of the accelerated life test of pressure accelerated factor, the accelerated life test of rotating speed accelerated factor and Temperature Accelerating Factor in Life Test.
9. test method as claimed in claim 8, it is characterised in that guarantee that medium is full of the pipeline between circulating line, water tank and booster pump and the pipeline between tested water pump and PLC converter plant before the test.
10. test method as claimed in claim 8, it is characterized in that, test platform is carried out supercharging until being added to tested pressure and stopping by the booster pump starting pressure charging system, booster pump is controlled by central processing unit, guarantee when the force value of test platform reduces 1% compared with tested force value, start booster pump supercharging, supercharging is stopped when the force value of test platform exceedes the 1% of tested force value, then pass through vacuum tank and unstable system pressure is stably maintained at tested force value, it is achieved the accelerated life test of pressure accelerated factor；
The running frequency being changed tested pump motor by the PLC converter plant in drive system changes rotating speed, it is achieved the accelerated life test of rotating speed accelerated factor；
By heat power supply device, the medium in circulating line is heated, the heating-up temperature of heat power supply device is controlled by central processing unit, guarantee when beginning to warm up when the temperature value of test platform reduces 1K compared with dut temperature value, heating is stopped when the temperature value of test platform exceedes dut temperature value 1K, the temperature stabilization making test platform maintains dut temperature value, it is achieved the accelerated life test of Temperature Accelerating Factor in Life Test.
Force value in test platform is connected with central processing unit by pressure transducer；Temperature value is connected with central processing unit by temperature sensor；The tachometer value of water pump is connected with central processing unit by speed probe, and described pressure transducer, temperature sensor and speed probe gather and record the pressure of correspondence, temperature and pump rotary speed information respectively, and the information of collection are fed back on central processing unit；
The control program of central processing unit arranges alarming value, when process of the test occurring, actual value exceedes warning value alarm and is automatically stopped test, to avoid the generation of danger；
The interface that described test platform is reserved is all rapid translating interface, and the water pump for different model realizes interface docking, so that test platform to be transformed.
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Cited By (9)
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| CN108195605A (en) * | 2016-12-08 | 2018-06-22 | 山东省农业机械科学研究院 | A kind of water pump flow production line intelligence on-line checking testing stand |
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| CN110336059A (en) * | 2019-03-29 | 2019-10-15 | 上海楞次新能源汽车科技有限公司 | A kind of the pressure oscillation test device and method of fuel cell hydrogen circulating pump |
| CN110645197A (en) * | 2019-10-12 | 2020-01-03 | 苏州浪潮智能科技有限公司 | Method and system for detecting service life of fan |
| CN110645197B (en) * | 2019-10-12 | 2021-02-02 | 苏州浪潮智能科技有限公司 | Method and system for detecting service life of fan |
| CN114485778A (en) * | 2021-12-27 | 2022-05-13 | 广州高澜节能技术股份有限公司 | Automatic detection device and method for FACTS cooling equipment |
| CN116292242A (en) * | 2023-01-13 | 2023-06-23 | 合肥新沪屏蔽泵有限公司 | Water pump accelerated life test system |
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| CN105715530B (en) | 2018-01-19 |
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