Centrifugal Compressor Testing

所述离心式压缩机测试本文提供了有关所述离心式压缩机的空气动力学测试,机械运转试验,叶轮超速试验,套管检查和壳体水压试验,叶轮和动平衡,振动测试和分析和气体泄漏测试信息。您可能要检讨离心式压缩机检查过程and corresponding检验和测试计划

Centrifugal Compressor Aerodynamic Testing

centrifugal compressor aerodynamic testingis performed after completion of the assembly. The API Std. 617 requires that the aerodynamic testing being conducted based on the requirements of ASME PTC-1997.

基于该离心压缩机测试要求的最小数据点5包括浪涌和阻塞点可采取,和等熵头与体积流量被绘制。试验应被重复用于不同轴转速,并且类似地,浪涌点应被识别。

绘制的空气动力学性能曲线应aginst批准压缩机数据表和程序进行验证,以确保被满足验收范围等熵头,潮点,效率和功耗。

Centrifugal Compressor Mechanical Running Test

该mechanical running test is performed after Aerodynamic performance test. In the mechanical running test, we are testing mechanical operation of the compressor. The test shall be done based on approved test procedure.

该centrifugal comressor testing procedure or approved datasheet shall be used for acceptance criteria. The test starts with minimum speed almost at 1000 rpm to identify any abnormal issue and then increased to 100 % of MCS (maximum continuous speed) at the rate increment of 10%.

For example, if the rotor speed (MCS) is 12000 rpm, in the first stage the rotor speed is brought to 1200 rpm and then stays at this speed for a while and then is increased to the 2400 rpm, and this process continues until reaches to 12000 rpm.

For example, if the rotor speed (MCS) is 12000 rpm, in the first stage the rotor speed is brought to 1200 rpm and then stays at this speed for a while and then is increased to the 2400 rpm, and this process continues until reaches to 12000 rpm.

Subsequently, the rotor speed shall be increased to the trip speed and run for 15 min. The trip speed is 115% of MCS speed, and MCS speed is the highest rotor speed which designed and tested and capable of continuous operation.

After this 15 min, the rotor speed is reduced to the 100 MCS and compressor runs for 4 hours. When the compressor reached to MCS speed shall run for 30 minutes to get all variables such as oil temperature, pressure, bearing metal temperature and vibration levels stabilized.

fter stabilization, the test technician starts the collection of measurements in each 10 or 15 minutes. At the end of the test, the mechanical running test result is provided in the tabulated format.

轴承金属温度,润滑油温度和压力,密封油的温度和压力,冷却水温度和压力,轴承壳体振动,轴振动,和功率消耗是在机械运行试验测得的参数。

按照API 617,作业轴承,作业振动探针和工作的密封件应当用于机械运转试验。

所收集的测量被提供给检验员在测试结束时,并且它是检查员的责任验证测量aginst验收标准。

如前所述验收标准可以在经批准的程序或压缩机数据表中找到。对于振动验收标准测试程序或API 617直接可能取决于项目说明书中使用。

During the mechanical running test, the inspector shall make a visual inspection and walk around of compressor and make sure there is no leak from piping joints or compressor connections, and there is no abnormal noise, etc.

Centrifugal Compressor Impeller Overspeed Test (Spin Test)

压缩机叶轮超速试验性能rmed before rotor assembly.

在第一步骤中,叶轮进行试验前的透彻尺寸检验。内径(内孔),外径和眼密封件被测量和记录。

在第二步骤中,the impeller mounted in the machine in a vacuum chamber (to avoid windage) and then is rotated at the speed of 115% of the MCS for 1 minutes. The impeller is subjected to the strong centrifugal force during this 1 minutes.

In the third Step,a second dimensional inspection shall be performed and checked against first dimensional inspection. The change in the dimension is inevitable, but the change shall be within the acceptance range.

API 617未提供可接受的范围,并且是指该制造商的规范。检查人员应前和尺寸检查报告后,审查和检查aginst制造商的验收标准,并确保在秋季尺寸接受范围之内的变化。

在第四步骤中,叶轮进行染料渗透或磁粉检验,以确保没有叶轮超速测试期间裂纹的发展。

离心式压气机机匣检验

压缩机壳体“material test report (MTR)“进行复核,通过铸造或锻造的壳体或者是由该材料试验报告应aginst分配ASTM标准材料进行验证并确保化学组成,mechanical properties例如抗张强度,屈服强度,延伸率和断面收缩率是接受的范围内。

热处理的类型,保持时间和温度也应进行验证。在一些材料类型,硬度值应以布氏或洛技术来测量。你应该确保你可在地铁硬度值,该值小于允许的最大值。

该API 617, contrary to theAPI 610(泵)不寻址所需的目视检查和在压缩机壳体的无损检测量。测试的量取决于压缩机制造商和客户,但地址的试验方法和验收标准NDE测试之间的协议。

You should check approved inspection and test plan to see what NDE testing being considered for casing inspection and make sure you can locate those tests in the casing MTR.

API 617要求通过试验方法来进行PT测试在ASTM E165,基于ASTM E709,UT基于ASTM A609 MT(铸造)和ASTM A388(锻造)和RT寻址基于ASTM E94。

上面提到的ASTM标准测试公关ocedures, and you can not find acceptance criteria there. The API 617 requires the test interpretation be performed based on ASME Code Section VIII Div. 1 Appendix 7 (for Casting). This appendix covers all above tests e.g. PT, MT, RT, and UT.

If you refer to this appendix, you will notice this appendix in some tests refers you to some other ASTM standards. The most important ones are ASTM E446, ASTM E 186 and ASTM E280 for RT film interpretation.

该se 3 standards have adjunct comparator radiographs that shall be used in film interpretation. The RT technician shall match the actual compressor RT films with these reference radiographs and decide about acceptability or unacceptability of the films.

You should review the NDE test report and make sure the NDE tests being interpreted and reported aginst correct assigned standard. As you might know, an indication might be a defect in one standard and be an acceptable imperfection based the other standard.

用于焊接的部件,例如喷嘴和附件的验收标准都参考ASME第八节1区UW 51和52,用于RT和附录6和8为PT和MT和附录12,用于UT。

在材料试验报告审查的圆满完成(NDE报告包括)后,您需要见证水压试验。

Casing Hydrostatic Testing @ Centrifugal Compressor Testing

压缩机壳体应承受的水压试验,类似于其他旋转设备;外壳应在最大允许工作压力的1.5倍进行测试。

你作为督察或客户代表不需要计算测试压力。试验压力应批准水压试验过程或批准的压缩机数据表来读取。如果没有泄漏或渗漏在30分钟(最小时间压缩机壳体应当在压力下)所观察到的测试结果应被认为是令人满意的。

氯化物含量应低于50ppm,如果在外壳的材料是不锈钢。压力表应进行校准,并应验证规标签和计量认证校准和到期日期。

该preferable pressure range gage is two times of the test pressure but in no case shall be less than 1.5 times and more than 4 times of the test pressure.

Gas Leakage Test @Centrifugal Compressor Testing

该centrifugal compressor gas leakage test shall be performed after successful completion of the mechanical running test. The compressor shall be pressurized with inert gas to the maximum sealing pressure for 30 minutes. The test can be considered as the last test which is performed in centrifugal compressor testing.

该compressor end seals (contract seals) shall in the installed condition. The compressor shall be subjected to soap water bubble test. The bubble test can be done based on the requirement of the ASME Section V - Article 10 - Leak testing.

家用清洁剂不得用于肥皂水溶液。具体泄漏试验溶液应购买并用于试验。如果没有气泡的发展从接头,连接等中观察到的测试结果将是令人满意

Vibration Test & Analysis @ Centrifugal Compressor Testing

该API 617只要求离心式压缩机的振动试验和分析being performed at shaft adjacent to the bearings during the aerodynamic performance test and in the mechanical running test. The proximitor probe is used for measurement and usually is handled by 4 probes, two for suction bearings X and Y axises and two for discharge bearing same X and Y axises.

You may also review the第三方检验离心压缩机制品,它可以被认为是用于离心式压缩机的测试和检验一个检查指令。

您可能还需要一个样本centrifugal compressor inspection and test plan

以下内容提供了一种可能是有用的一个示例一般离心式压缩机的测试程序。betway GD真人验收标准并没有在本次测试过程得到解决。这是一个非常简单的和一般程序。betway GD真人

Applicable Standards @ Centrifugal Compressor Testing

为离心压缩机测试适用的标准是:

  • API Standard 617; Centrifugal Compressor for Petroleum, Chemical and Gas Service Industries
  • ASME PTC 10; Performance Test Code on Compressors and Exhausters
  • BS EN ISO 5167-2;通过插在圆形横截面的管道运行全压力的压差装置的流体流量的测量 - 第2部分:孔板
  • BS ISO 5389的涡轮压缩机性能试验规程

Required Data for Centrifugal Compressor Mechanical Running Test

Following data need to be extracted for centrifugal compressor testing from design documents, datasheet and operating manual and to be available during the test.

Specified Operating Speeds

  • 正常运行速度
  • 最小操作速度
  • 最大连续速度
  • 旅行速度

Maximum Shaft Vibration

  • At Maximum Continuous Speed
  • 在跳闸速度

润滑油数据

  • 油粘度等级
  • 石油进口温度
  • 石油进口压力
  • 最大油的体积流量压缩机

Shaft Seals

  • 密封类型
  • Seal Medium

Preparation for Centrifugal Compressor Mechanical Running Test

通常一个清单来确保所有的项目都根据设计和实际运行情况。

下列组件是由离心式压缩机试验台使用(不合同项)

  • 驱动单元(电动机)
  • Gear box
  • 连接器(带适配器POSS)。
  • 中冷器
  • 石油部
  • Process gas piping
  • 仪器
  • 振动监测系统
  • Data acquisition equipment

该following components are used from centrifugal compressor (original)

  • 耦合(POSS。带适配器)X
  • Seal gas panel
  • 仪器
  • 轴振动测量设备

注:耦合和仪器从两个系统中使用的,即试验台压缩机的原始部件

离心式压缩机测试 - 机械运行测试

该mechanical running test is done with the following sequence:

  1. 该speed increase from standstill up to minimum driver control speed.
  2. Speed increase in steps of approx. 10% of maximum continuous speed up to maximum continuous speed (MCS) under consideration of the lateral natural frequencies.
  3. Continuations of operation until lube oil and bearing temperatures have stabilized.
  4. Speed increases up to trip speed. Test runs for 15 minutes at trip. Babbitt metal temperatures, oil inlet and outlet temperatures and pressures and the overall oil volume flow are measured and recorded once. Shaft vibrations are measured and recorded once at all contact measuring locations.
  5. 速度减速到MCS。测试运行在MCS 4小时。巴氏合金的温度下,油的入口和出口的温度和压力以及整体油的体积流量测量并记录在约20分钟的间隔。入口和出口温度以及处理流体的压力被测量和记录。轴的振动被测量并在约20分钟的间隔在所有现有的测量点记录。振动光谱分析在4小时的测试运行的中间大约进行。
  6. Speed increase up to trip speed.
  7. Speed deceleration to final standstill.

未过滤并过滤位移幅值和对应的相位角将被记录和滑行期间作图速度。滑行过程中的波特图。

机械运转试验足够降温压缩机和后完成之后将根据检验和测试计划进行检查。

离心式压缩机测试 - 振动测量与分析

Shaft vibrations and axial displacements are measured. Vibration measurements are carried out with the vendor measuring system. All other necessary instrumentation for vibration analysis needs to be available by centrifugal compressor vendors.

对于根据设计安装在试验台上的监视系统中的轴的振动的容许振幅的评估使用。用于可视化和制备重复使用的移动诊断系统。

截杀被确定和记录。只有这些值都具有约束力的机器。低速轴的振动监视器仅指示慢滚信号。

If the measured slow-roll-signal values during the test run exceed distinctly the specified run out values, run out are controlled and, if necessary, refurbished after completion of the test run without repeating the test run.

Required Data for Thermodynamic Performance Test

下面的数据需要从离心压缩机设计书,数据表中提取和操作手册,并为可用于计算。

运行条件

  • 燃气种类
  • Mass Flow, Wet

Inlet conditions

  • Pressure
  • Ťemperature
  • 相对湿度
  • Inlet Volume, Wet

Discharge Conditions

  • Pressure
  • Ťemperature

Performance

  • Shaft power at compressor coupling (incl. losses)
  • 压缩机的转速
  • 变压头
  • 多变效率

Similarly the centrifugal compressor testing medium and related operating parameter need to be identified. N2 normally is used as the test medium. Following also need be specified:

Ťest Meduim Inlet Condition

  • Pressure
  • Ťemperature
  • 相对湿度
  • 气体常数X压缩系数
  • 进口体积流量,干

Ťest Meduim Discharge Condition

  • Pressure
  • Ťemperature

Performance

  • Gas Power
  • 压缩机的转速

Centrifugal Compressor Testing - Thermodynamic Performance Test Procedure

开始的热力学性能试验前的压缩机在所计算出的试验条件的足够的一段时间以证明所有测量的可接受的机械操作和稳定的值进行操作。

All instruments are inspected separately and the measured variables in identical measuring planes are compared to each other.

该duration of the test is depending on the time needed to reach steady-state test conditions. This condition is insured by steady-state values of pressures and temperatures.

自动数据采集系统中使用。该数据记录,处理和显示在线。

离心式压缩机测试 - 测量与分析

Previous to the test all measuring instruments for pressure and temperature are calibrated. On customer's request the calibration can be redone after the test for one instrument each for pressure and temperature at the inlet and discharge port.

该inlet and discharge pressures and temperatures are measured on centrifugal compressor testing on the basis of the applicable documents.

该mass flow is measured according to BS EN ISO 5167-2

轴功率将与热平衡方法来计算。

用于机械功率损耗被用于设计值。

该Reynolds Number correction is done in accordance to ICAAMC.

测量每个BS ISO 5389的不确定性

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