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Water pump service life reliability acceleration test method

A test method and reliability technology, applied in the field of water pumps, can solve the problems of large time and economic cost, unfavorable water pump development, etc., and achieve the effect of reducing test cost, shortening test time and improving test efficiency

Pending Publication Date: 2021-11-09
GUANGZHOU KEYE VENTILATION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the accelerated life reliability testing method for water pumps has always been a blank. Without the accelerated life testing method, the accelerated life test of the water pump cannot be carried out. To obtain the life information, the only way to get the life information is to pass the conventional life test, which will bring huge Time and economic costs are not conducive to the development of the pump industry

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  • Water pump service life reliability acceleration test method

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Experimental program
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Effect test

test approach 1

[0044] Test scheme 1: The test sample size is 5 water pump test items. Accelerated stress level adopts ①AC254V / 50Hz (0~720hrs), ②AC254V / 45Hz (720~1440hrs), ③AC254V / 60Hz (1440~2880hrs) three accelerated stress levels. The acceleration condition of the set operation is as follows: the maximum working condition head stress: 2m. Temperature stress: The liquid temperature of the working medium (water or oil) is 45°C. pH stress: pH=7.0. Physical and mechanical friction and abrasion stress: sediment mixture 3.0kg / 100L working fluid. Viscous resistance stress: The dosage of viscous substance in polymer resin coating waste liquid is 1.5kg / 100L working fluid.

[0045] Test results: the cumulative test time of the first accelerated stress level (AC254V / 50Hz) is 720hrs, the cumulative test time of the second accelerated stress level (AC254V / 45Hz) is 1440hrs, and the third accelerated stress level (AC254V / 60Hz) The accumulative test time is 2880hrs, and the accelerated feature test val...

test approach 2

[0046]Test scheme 2: The test sample size is 7 water pump test items. Accelerated stress level adopts ①AC254V / 50Hz (0~1200hrs) and ②AC240V / 50Hz (1200~2160hrs) two accelerated stress levels. The acceleration condition of the set operation is as follows: the maximum working condition head stress: 2m. Temperature stress: working medium (water or oil) liquid temperature is 50°C. pH stress: pH=6.0. Physical and mechanical friction and abrasion stress: sediment mixture 4.0kg / 100L working fluid. Viscous resistance stress: The dosage of viscous substance in polymer resin coating waste liquid is 2.0kg / 100L working fluid.

[0047] Test results: the accumulative test time of the first accelerated stress level (AC254V / 50Hz) is 1200hrs, the accumulative test time of the second accelerated stress level (AC240V / 50Hz) is 2160hrs, and the mean time between failure (MTBF) of the screening standard Accelerated characteristic test value (AFEV): The end point of the accelerated life test is 21...

test approach 3

[0048] Test scheme 3: The test sample size is 11 water pump test items. Accelerated stress level adopts ①AC254V / 50Hz (0~360hrs), ②AC207V / 50Hz (360~720hrs), ③AC240V / 50Hz (720~1440hrs) three accelerated stress levels. The acceleration condition of the set operation is as follows: the maximum working condition head stress: 2m. Temperature stress: the liquid temperature of the working medium (water or oil) is 55°C. pH stress: pH=10.0. Physical and mechanical friction and abrasion stress: sediment mixture 3.0kg / 100L working fluid. Viscous resistance stress: The dosage of viscous substance in polymer resin coating waste liquid is 1.5kg / 100L working fluid.

[0049] Test results: the cumulative test time of the first accelerated stress level (AC254V / 50Hz) is 360hrs, the cumulative test time of the second accelerated stress level (AC207V / 50Hz) is 720hrs, and the third accelerated stress level (AC240V / 50Hz) The cumulative test time is 1440hrs, and the accelerated characteristic test...

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Abstract

The invention discloses a water pump life reliability accelerated test method, which comprises the following steps of: determining an accelerated life test platform and a working medium, and determining a test sample size of a tested pump; taking voltage and frequency as acceleration stress of the test and respectively setting acceleration working conditions of operation, wherein the acceleration working conditions at least comprise a temperature acceleration factor, a pH value acceleration factor, a mechanical physical abrasion acceleration factor, a viscous resistance acceleration factor and a lift acceleration factor; selecting a corresponding power supply excitation module according to the electrical parameter characteristics of the tested pump; using different voltages and frequencies as acceleration stress levels of the test on the tested pump, performing an accumulative acceleration test of at least two acceleration stress levels under a set operation acceleration working condition, stopping operation after an expected set failure point is reached, and therefore, the accumulative time from test starting to operation stopping of the tested pump is recorded; and achieving the acceleration reliability comprehensive simulation test under the composite working condition of six acceleration factors, and therefore, the test time is shortened, the efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of water pumps, in particular to an accelerated test method for life reliability of water pumps. Background technique [0002] A water pump is a machine that transports or pressurizes a fluid. As a product, the water pump has attracted much attention from consumers for its service life. When the flow rate and head meet the requirements of consumers, the pump with longer service life will be favored by consumers. For a water pump, the most effective and reliable way to know its accurate service life is to conduct a life test on it. Through life testing, not only accurate life information can be obtained, but also weak points in product design and manufacturing can be found, which in turn can guide product optimization. Therefore, it is very necessary to conduct a life test on the water pump. [0003] There are two main types of life testing: conventional life testing and accelerated life testing. Conventional life...

Claims

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Application Information

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IPC IPC(8): G01M99/00F04B51/00
CPCG01M99/00F04B51/00
Inventor 黄成勇李绍华黄嘉华
Owner GUANGZHOU KEYE VENTILATION EQUIP CO LTD
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