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测试解决方案 » 测试解决方案 测试类型 » 高周疲劳 » Compressor Valves

Fatigue Testing of Compressor Valves

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  • 高周疲劳

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In service, the internal components of a reciprocating compressor valve, comprising springs, and a stiff perforated membrane are subjected to repeated cyclic loading at a frequency of approximately 20 Hz (equivalent to a synchronous motor speed of 1300 rpm). The failure mechanism of the device is typically associated with either failure of the return spring, used to preload the membrane, or failure of the membrane itself due to fatigue cracking between perforations

An ElectroPuls™ E3000 test instrument was used to investigate the fatigue life and failure mechanisms of these compressor devices at frequencies above 20 Hz. This particular compressor manufacturer supplied the internal components of the valve and fixtures were manufactured to fit them into the test instrument. SAX single-axis fatigue software was used to define and run the tests.

Three different test scenarios were successfully run:

  • A digital position controlled test to model basic loading of the springs
  • A position controlled test using the Advanced Amplitude controls in SAX to provide outer-loop control with a 2 mm positive position peak and -38 N compression lower peak. This test simulates full stress loading of the springs prior to valve having full contact.
  • A digital position controlled test with amplitude and mean position to produce impact loads in the region of -150 N at 20 Hz, simulating the valve in full contact.

ElectroPuls™ Electrodynamic Test Instruments

ElectroPuls instruments are state-of-the-art electrodynamic test systems for dynamic and static tests on materials & components. Powered entirely from a single-phase mains supply, they feature the latest in testing technology and a host of other user-oriented features.

  • 产品
  • 4/24/2013
  • 1.7 MB

ElectroPuls™ E1000 All-Electric Dynamic Test Instrument

The ElectroPulsTM E1000 is a state-of-the-art, all-electric test instrument designed for dynamic and static testing on a wide range of materials and components. It includes Instron® advanced digital control electronics, DynacellTM load cell, Console software, and the very latest in testing technology – hassle-free tuning based on specimen stiffness, electrically operated crosshead lifts, a T-slot table for flexible test set ups, and a host of other user-orientated features. Powered from a single-phase supply it requires no additional utilities for basic machine operation (for example, pneumatic air, hydraulics, or water).

  • 产品
  • 3/3/2017
  • 0.7 MB

ElectroPuls™ E3000 All-Electric Dynamic Test Instrument

The ElectroPulsTM E3000 is a state-of-the-art, all-electric test instrument designed for dynamic and static testing on a wide range of materials and components. It includes Instron® advanced digital control electronics, DynacellTM load cell, Console software, and the very latest in testing technology–hassle-free tuning based on specimen stiffness, electrically operated crosshead lifts, a T-slot table for flexible test set ups and a host of other user-orientated features. Powered from a single-phase supply it requires no additional utilities for basic machine operation (for example, pneumatic air, hydraulics, or water).

  • 产品
  • 3/3/2017
  • 0.7 MB

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