PM645B测点配置要求多事件键相：往复式压缩机的驱动端安装多事件键相转轮MEW来测量往复式压缩机的键相参考信号。该多事件键相转轮可选择本特利标准多事件转轮MEW，或者往复式压缩机生产厂家结合自己设备结构设计特点、按照本特利对于多事件键相转轮的工程实践经验来特殊定制和设计多事件键相转轮。多事件键相信号采用本特利3300XL系列电涡流传感器进行测量。

1. Measurement point configuration requirementsMulti event Keyphasor: a multi event Keyphasor runner mew is installed at the drive end of the reciprocating compressor to measure the Keyphasor reference signal of the reciprocating compressor. Bentley standard multi event runner mew can be selected as the multi event Keyphasor runner, or the reciprocating compressor manufacturer can customize and design the multi event Keyphasor runner according to Bentley's engineering practice experience on multi event Keyphasor runner in combination with its own equipment structure design characteristics. Multi event Keyphasor signals are measured by Bentley 3300xl series eddy current sensors.



Crankcase vibration: a vibration speed sensor is arranged on the horizontal axis of each main bearing between the two cylinder banks of the crankcase of the reciprocating compressor to measure the vibration of the crankcase body. When the working speed of the reciprocating compressor is higher than 500rpm, Bentley 330500 series velomitor piezoelectric vibration speed sensor is used; When the working speed is lower than 500rpm, Bently 190501 velomitorct piezoelectric vibration speed sensor is used.



Crosshead vibration: redundant acceleration sensors are configured on the vertical plane of the crosshead movement midpoint of each cylinder of the reciprocating compressor to monitor the impact events of reciprocating parts; Bently 330425 acceleration sensor is used for measurement.



Piston rod position: a pair of mutually perpendicular piston rod position measuring points are arranged in the horizontal and vertical directions of each cylinder of the reciprocating compressor perpendicular to the piston rod plane; Bentley 3300xl series eddy current sensor is used for measurement. For reciprocating compression piston rod measurement.



Cylinder dynamic pressure: two cylinder pressure measuring points (intake and exhaust) are arranged on each cylinder of the reciprocating compressor, and Bently 165855 cylinder pressure sensor is used for measurement.



Bearing vibration: each main bearing in the crankcase of the reciprocating compressor is equipped with a speed sensor to measure the vibration of the bearing. When the working speed of the reciprocating compressor is higher than 500rpm, Bentley 330500 series velomitor piezoelectric vibration speed sensor is used; When the working speed is lower than 500rpm, Bently 190501 velomitorct piezoelectric vibration speed sensor is used.



Bearing temperature: each main bearing is equipped with a temperature sensor to measure the bearing temperature.



Air valve temperature: each air valve (intake valve and exhaust valve) of the reciprocating compressor cylinder is equipped with a temperature measuring valve temperature.



Gearbox shell vibration (if applicable): a pair of X / Y direction shell vibration measuring points are arranged at the support bearings of input and output shafts of each gearbox; Bentley 330400 series piezoelectric vibration acceleration sensor is used for measurement.



Motor bearing vibration: each rolling support bearing is equipped with two bearing vibration measuring points (installed in horizontal and vertical directions), and Bently 330500 series velomitor piezoelectric vibration speed sensor is used for measurement.



2. Bently 3500 configuration requirements



Each key compressor unit is equipped with Bentley 3500 frame



Bently redundant 3500 / 15 power module



Bently bently3500 / 22m transient data interface module (RJ45 network interface)



The Bentley 3500 frame of each unit is equipped with corresponding 3500 / 25 Keyphasor module



Reciprocating compressor crankcase vibration, crosshead vibration and bearing vibration are equipped with corresponding 3500 / 70m monitor modules



The corresponding 3500 / 72m monitor module shall be configured for the piston rod position measuring point



Reciprocating compressor cylinder dynamic pressure configuration corresponding 3500 / 77m monitor module



Bearing temperature and air valve temperature measurement points shall be equipped with corresponding 3500 / 60, / 61, / 62 or / 65 monitor modules



Corresponding 3500 / 42m monitor module shall be configured for gearbox shell vibration and motor pad vibration



Each monitoring channel is configured with two relay output channels of vertical D; The 3500 / 32 (4-channel) or 3500 / 33 (16 channel) relay module Bently is used as a 3500 / 92 Modbus communication gateway. For the unit working in the hazardous area, the 3500 monitor module accessing the field signal shall be equipped with a built-in safety barrier; And 3500 / 04 intrinsically safe grounding module shall be configured in the 3500 rack.



The product quality of Bently 3500 rotary machinery vibration protection instrument and condition monitoring system strictly complies with the American API 670 standard.

Bentley vibration monitoring training course, the main content of this course: displacement sensor noise source



Noise is a signal you don't need, but in most cases, noise is unavoidable in the measurement process. Although the noise cannot be removed during the measurement process, the noise can be reduced to a small level Z so that it will not affect your analysis of the signal. To do this, it is necessary to understand the source and characteristics of noise. Noise is an undesirable signal component, which can distort data and hinder your ability to extract machine state information from the data. The information contained is irrelevant to the state of the machine. Noise can be introduced into the vibration signal from one part of the measurement system, but each part of the system has different sensitivity to noise. Bently displacement sensors include Bently 3300 series eddy current sensor probes.



Noise source of displacement sensor



1. Installation: vibration of sensor support 5. Runout - Mechanical deviation



Noise source of displacement sensor



Runout – electrical deviation: alloy elements are non-uniform, conductivity is non-uniform, magnetic conductivity is non-uniform, local stress of the material is concentrated, and there is local magnetization area on the axis



Noise source of displacement sensor



Runout and run time – short time mechanical and electrical deviations are stable



Noise source of displacement sensor



Runout and running time - the noise source of displacement sensor when thermal and process parameters change in medium time曲轴箱振动：在往复式压缩机曲轴箱两个气缸列之间的每个主轴承的水平轴线上配置一个振动速度传感器测量曲轴箱体振动。当往复式压缩机的工作转速高于500rpm时采用本特利330500系列Velomitor压电式振动速度传感器；当工作转速低于500rpm时采用本特利190501VelomitorCT压电式振动速度传感器。
 
　　十字头振动：在往复式压缩机每个气缸十字头运动中点位置的垂直平面上配置冗余的加速度传感器来监测往复运动部件的冲击事件；采用本特利330425加速度传感器进行测量。
 
　　活塞杆位置：在往复式压缩机每个气缸垂直于活塞杆平面的水平和垂直方向，配置一对互为垂直的活塞杆位置测点；采用本特利3300XL系列电涡流传感器进行测量。对于往复式压缩活塞杆的测量。
 
　　气缸动态压力：在往复式压缩机的每个气缸上配置两个气缸压力测点（吸气和排气），采用本特利165855气缸压力传感器进行测量。
 
　　轴承振动：往复式压缩机曲轴箱中每个主轴承配置一个速度传感器测量轴承的振动。当往复式压缩机的工作转速高于500rpm时采用本特利330500系列Velomitor压电式振动速度传感器；当工作转速低于500rpm时采用本特利190501VelomitorCT压电式振动速度传感器。
 
　　轴承温度：每个主轴承上配置温度传感器测量轴承温度。
 
　　气阀温度：在往复式压缩机气缸的每个气阀（吸气阀和排气阀）上配置温度测量阀门温度。
 
　　齿轮箱壳振（如适用）：每个齿轮箱的输入和输出轴的支持轴承处各配置一对X/Y方向壳振测点；采用本特利330400系列压电式振动加速度传感器进行测量。
 
　　电动机瓦振：每个滚动支持轴承上配置两个瓦振测点（水平和垂直方向安装），采用本特利330500系列Velomitor压电式振动速度传感器进行测量。
 
　　2.本特利bently3500配置要求
 
　　每套关键压缩机组配备本特利3500框架
 
　　本特利bently冗余的3500/15电源模块
 
　　本特利bently3500/22M瞬态数据接口模块（RJ45网络接口）
 
　　每台机组的本特利3500框架内配置相应的3500/25键相模块
 
　　往复式压缩机曲轴箱振动、十字头振动、以及轴承振动振均配置相应的3500/70M监测器模块
 
　　活塞杆位置测点，需配置相应的3500/72M监测器模块
 
　　往复式压缩机气缸动态压力配置相应的3500/77M监测器模块
 
　　轴承温度和气阀温度测量点，需配置相应的3500/60、/61、/62或/65监测器模块
 
　　齿轮箱壳振和电动机瓦振，需配置相应的3500/42M监测器模块
 
　　每个监测通道配置D立的两个继电器输出通道；采用3500/32（4通道）或3500/33（16通道）继电器模块本特利bently一个3500/92Modbus通讯网关,对于工作在危险区的机组，接入现场信号的3500监测器模块要带有内置安全栅；并且3500框架内要配置3500/04本安接地模块。
 
　　本特利bently3500旋转机械振动保护仪表和状态监测系统的产品质量严格遵循美国API670标准。
本特利振动监测培训教程，本教程的主要内容：位移传感器噪声源
 
　　噪声是一种你不需要的信号，但多数情况下，在测量过程中，噪声是无法避免的。尽管在测量过程中无法除噪声，但可以将噪声降低到Z小程度，使其不影响你对信号的分析。要做到这一点，就要了解噪声的来源和特征。噪声是一种不合乎需要的信号成分，它可以歪曲数据，妨碍你从数据中提取机器状态信息的能力，包含的信息与机器的状态无关。噪声可以从测量系统的一个环节引入振动信号，但系统各个部分对噪声的敏感程度不同。本特利位移传感器包括bently3300系列的涡流传感器探头。
 
　　位移传感器噪声源
 
　　1·安装：传感器支架振动5、偏差（runout）–机械偏差
 
　　位移传感器噪声源
 
　　偏差（runout）–电偏差合金元素不均匀导电性不均匀导磁性不均匀轴材料局部应力集中轴上存在局部磁化区域
 
　　位移传感器噪声源
 
　　偏差（runout）与运行时间–短时间机械偏差和电偏差是稳定的
 
　　位移传感器噪声源
 
　　偏差（runout）与运行时间–中等时间热力参数和工艺参数发生变化位移传感器噪声源