T:010-84282935 | E:sales@cnmec.biz


主要产品

CAN总线显示器

 
 
 
 
 
  液位仪表
 

振动开关

 
 
 
 
 
 
 
 
 
 

发动机J1939总线产品

  Battery Chargers
 
 
 
 
 
 
 
市场应用
 
 
 

工业市场

 

石油天然气业绩案例

 
最新消息
 

展览计划

 
 

 

振动开关及振动变送器、传感器
Vibration Transmitter / Sensors Vibration Monitoring Solutions

Cooling tower vibration switches
却塔振动开关

 

当发生过度振动时,冷却塔振动开关触发警报和/或关闭设备有多种选择,从简单的机械开关到“智能”开关。SPX冷却技术提供以下开关类型,每种类型都具有不同的复杂程度,可帮助监测和保护冷却塔部件免受振动的潜在破坏性影响。Cooling tower vibration switches trigger an alarm and/or shut down equipment when excessive vibration occurs. A variety of options are available, from simple mechanical switches to “smart” switches. SPX Cooling Technologies provides the following switch types, each with varying levels of sophistication, which can help monitor and protect cooling tower components from potentially destructive effects of vibration.

 

Mechanical Vibration Switch
机械振动开关

 

机械振动开关是冷却塔振动管理最经济有效的选择。然而,它往往是最不准确和最不可靠的选择。机械开关包括一个惯性敏感机构,当振动超过规定的设定值时,该机构激活一个速动开关。当开关“跳闸”时,可以同时触发警报并关闭设备。因为这些开关不收集数据,所以它们只能在振动事件发生时作出反应。在许多情况下,这对于防止故障已经太迟了;机械开关唯一能防止的是对风塔的进一步损坏。The mechanical vibration switch is the most cost-effective option for cooling tower vibration management. However, it is often the least accurate and least reliable option. The mechanical switch comprises an inertia-sensitive mechanism that activates a snap-action switch if vibration exceeds a specified set point. The switch, when “tripped,” can simultaneously trigger an alert and shut down the equipment. Because these switches do not collect data, they are able only to react to a vibration event as it is occurring. In many cases this is too late to prevent a failure; the only thing the mechanical switch prevents is further damage to the tower.

 

Electronic Vibration Switch
电子振动开关

电子振动开关

用于冷却塔振动管理的电子振动开关比机械开关有几个优点。电子开关利用固态压电晶体在振动力变形时提供4-20毫安的电输出。超过预设极限的振动会触发警报,提醒操作人员检查冷却塔,并在故障发生前将其关闭。如果在操作员手动关闭风塔之前,振动超过第二个预设限值,则开关触发固态继电器自动关闭。机械和电子开关通常安装在结构支撑梁上。另外,电子开关还提供了一个外部加速计选项,当安装在变速箱外壳上时,可以提供更高的振动测量精度。The electronic vibration switch for cooling tower vibration management has several advantages over a mechanical switch. The electronic switch utilizes a solid-state piezoelectric crystal to provide a 4-20mA electrical output when deformed by vibration forces. Vibration that exceeds a preset limit triggers an alarm, alerting operators to inspect the cooling tower and shut it down before failure occurs. If vibration exceeds a second preset limit before operators manually shut down the tower, the switch triggers a solid-state relay for automatic shutdown. Both the mechanical and electronic switches typically are mounted on structural support beams. Alternately, the electronic switch offers an external accelerometer option which provides superior vibration measurement accuracy when mounted on the casing of the gearbox.

 

“Smart” Vibration Switch
“智能”振动开关

 

“智能”振动开关用于冷却塔振动管理的“智能”振动开关提供了电子振动开关的许多优点。智能开关使用内置压电加速度计测量振动。它占地面积小,外壳密封,可直接安装在齿轮箱或轴承箱上,不需要额外的外部加速计。SPX提供的智能开关具有工厂编程设定值、启动延迟和警报延迟计时器,特别针对冷却塔振动保护进行了优化。The “smart” vibration switch for cooling tower vibration management offers many of the advantages of an electronic vibration switch. The smart switch measures vibration with an imbedded piezoelectric accelerometer. Its small footprint and hermetically sealed casing allow installation directly onto the gearbox or bearing housing and does not require an additional external accelerometer. Smart switches offered by SPX feature factory-programmed set points, start-up delays, and alarm delay timers specifically optimized for cooling tower vibration protection.

 

SKF振动变送器 CMSS 420VT
传感器和变送器一体式,直接输出4-20mA信号
SKF Loop-powered Vibration Transmitter CMSS 420VT
SKF Machine Condition Transmitter (MCT) systems
CMSS 5301 / CMSS 5302

One and two channel, complete MCT system
传感器和变送器分开式的,同样输出4-20mA信号


SKF Machine Condition Transmitter (MCT) systems CMSS 5301 / CMSS 5302
Metrix ST5484E振动变送器

产品特性
- 环路供电,无极性无极性(IPT)1. 连接防止接线错误
- 可提供不同的安装螺栓
- 可提供架空引线,滑槽端子及MIL接头
- 最稳定的检测电路
- 温度冲击保护
- 宽频响
- 可选高/低通滤波器
- 嵌入式机座 & 壳体张力保护
- 可选动态信号
Metrix ST5491E速度变送器,现场显示型4-20mA速度变送器

产品特性
- LCD 显示
- 环路供电
- 与速度成比例的4-20 mA 输出
- 直接与PLC, DCS及4-20 mA监视器连接
- 可选不同的安装螺栓
- 最稳定的检测电路
- 内置温度冲击保护
- “滑坡斜率*” 保护
- 宽频响
- 可配高/低通滤波器
- 嵌入式底座 & 壳体张力保护
- 极低的交叉轴灵敏度
Metrix速度传感器 Metrix 5485C (375°C) 高温型速度传感器

温度: -54°C to 375°C
频率响应: 15 Hz 至 2000 Hz
加速度极限: 0 至 50 g
位移极限: 1.8 mm (70 mils) pk-pk
Bently Nevada 2300 Series Vibration Monitor
美国本特利BENTLY传感器,BENTLY传感器, BENTLY电缆, BENTLY前置器, BENTLY探头等
GE Bently Nevada本特利 1900/65A振动检测器

轻巧体积和多功能的完美结合
1900监测器采用简单、高性价比的方式对选定的机器或监测点进行机械保护。 它们在设计上作为独立装置工作,或与我们的Trendmaster ?
Pro在线状态监测系统协同工作。
常用型号:1900/65A-01-00-01-00-00;1900/65A-00-00-01-00-00;1900/65A-01-00-03-00-00;1900/65A-01-01-01-00-00;1900/65A-01-01-03-00-00;1900/65A-00-00-03-00-00;1900/65A-00-01-01-00-00;1900/65A-01-01-03-00-01等
GE Bently Nevada本特利 190501 Velomitor?CT低频速度传感器

190501 Velomitor* CT Velocity Transducer
190501 Velomitor?CT低频速度传感器,专为冷却塔振动监测设计,转速低至90rpm。
常用型号:190501-01-00-00,190501-12-00-00,190501-10-00-01......
190501 Velomitor* CT Velocity Transducer
190501 Velomitor?CT低频速度传感器,专为冷却塔振动监测设计,转速低至90rpm
GE Bently Nevada本特利 330505低频速度传感器

330505低频速度传感器
用于水力发电,检测定子铁芯、定子机座和轴承支撑的振动;
常用型号:
330505-01-02-02;330505-02-02-02
330505-01-02-00;330505-02-02-00
330505 Low Frequency Velocity Sensor
330505低频速度传感器

Dwyer Vibration Transmitter
Model VBT-1 Vibration Transmitter

Specifications
Housing Material:316 SS.
Temperature Limit:-22 to 221°F (-30 to 105°C).
Accuracy:< ±3%.
Connections:M12 connector.
Enclosure Rating:NEMA 6 (IP68).
Electrical Rating:9.6 to 32 VDC.
Mounting Orientation:Any position.
Nonlinearity:< ±0.25% of span.
Frequency Range:10 to 1000 Hz.
Output Signal:4 to 20 mA.
Repeatability:< 0.5%.
Weight:0.28 lb (0.125 kg).
Agency Approval:CE.

 

 


Murphy by Enovation Controls | FW Murphy Production Controls
Murphy Instrument Distributor
信德迈科技(北京)有限公司 CNMEC Technology

地址:北京市朝阳区望京街10号望京SOHO - T1- C座2115室
邮编:100102
电话:010 - 8428 2935,8428 9077,8428 3983
手机:13910122694
网站:Http://www.cnmec.com

VIEW ONLINE CATALOG >>
REQUEST A CUSTOM PANEL QUOTE >>


QQ: 209136943
Email: sales@cnmec.biz
传真:010-8428 8762

美国DMK Engineering Solutions公司


京ICP备08000876号-3
京公网安备 101050201974