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


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        振動開關及振動變送器、傳感器
        Vibration Transmitter / Sensors Vibration Monitoring Solutions

        Cooling tower vibration switches
        卻塔振動開關

         

        當發生過度振動時,冷卻塔振動開關觸發警報和/或關閉設備有多種選擇,從簡單的機械開關到“智能”開關。SPX冷卻技術提供以下開關類型,每種類型都具有不同的復雜程度,可幫助監測和保護冷卻塔部件免受振動的潛在破壞性影響。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
        機械振動開關

         

        機械振動開關是冷卻塔振動管理最經濟有效的選擇。然而,它往往是最不準確和最不可靠的選擇。機械開關包括一個慣性敏感機構,當振動超過規定的設定值時,該機構激活一個速動開關。當開關“跳閘”時,可以同時觸發警報并關閉設備。因為這些開關不收集數據,所以它們只能在振動事件發生時作出反應。在許多情況下,這對于防止故障已經太遲了;機械開關唯一能防止的是對風塔的進一步損壞。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
        電子振動開關

        電子振動開關

        用于冷卻塔振動管理的電子振動開關比機械開關有幾個優點。電子開關利用固態壓電晶體在振動力變形時提供4-20毫安的電輸出。超過預設極限的振動會觸發警報,提醒操作人員檢查冷卻塔,并在故障發生前將其關閉。如果在操作員手動關閉風塔之前,振動超過第二個預設限值,則開關觸發固態繼電器自動關閉。機械和電子開關通常安裝在結構支撐梁上。另外,電子開關還提供了一個外部加速計選項,當安裝在變速箱外殼上時,可以提供更高的振動測量精度。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”振動開關

         

        “智能”振動開關用于冷卻塔振動管理的“智能”振動開關提供了電子振動開關的許多優點。智能開關使用內置壓電加速度計測量振動。它占地面積小,外殼密封,可直接安裝在齒輪箱或軸承箱上,不需要額外的外部加速計。SPX提供的智能開關具有工廠編程設定值、啟動延遲和警報延遲計時器,特別針對冷卻塔振動保護進行了優化。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振動變送器 CMSS 420VT
        傳感器和變送器一體式,直接輸出4-20mA信號
        SKF Loop-powered Vibration Transmitter CMSS 420VT
        SKF Machine Condition Transmitter (MCT) systems
        CMSS 5301 / CMSS 5302

        One and two channel, complete MCT system
        傳感器和變送器分開式的,同樣輸出4-20mA信號


        SKF Machine Condition Transmitter (MCT) systems CMSS 5301 / CMSS 5302
        Metrix ST5484E振動變送器

        產品特性
        - 環路供電,無極性無極性(IPT)1. 連接防止接線錯誤
        - 可提供不同的安裝螺栓
        - 可提供架空引線,滑槽端子及MIL接頭
        - 最穩定的檢測電路
        - 溫度沖擊保護
        - 寬頻響
        - 可選高/低通濾波器
        - 嵌入式機座 & 殼體張力保護
        - 可選動態信號
        Metrix ST5491E速度變送器,現場顯示型4-20mA速度變送器

        產品特性
        - LCD 顯示
        - 環路供電
        - 與速度成比例的4-20 mA 輸出
        - 直接與PLC, DCS及4-20 mA監視器連接
        - 可選不同的安裝螺栓
        - 最穩定的檢測電路
        - 內置溫度沖擊保護
        - “滑坡斜率*” 保護
        - 寬頻響
        - 可配高/低通濾波器
        - 嵌入式底座 & 殼體張力保護
        - 極低的交叉軸靈敏度
        Metrix速度傳感器 Metrix 5485C (375°C) 高溫型速度傳感器

        溫度: -54°C to 375°C
        頻率響應: 15 Hz 至 2000 Hz
        加速度極限: 0 至 50 g
        位移極限: 1.8 mm (70 mils) pk-pk
        Bently Nevada 2300 Series Vibration Monitor
        美國本特利BENTLY傳感器,BENTLY傳感器, BENTLY電纜, BENTLY前置器, BENTLY探頭等
        GE Bently Nevada本特利 1900/65A振動檢測器

        輕巧體積和多功能的完美結合
        1900監測器采用簡單、高性價比的方式對選定的機器或監測點進行機械保護。 它們在設計上作為獨立裝置工作,或與我們的Trendmaster ?
        Pro在線狀態監測系統協同工作。
        常用型號: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低頻速度傳感器

        190501 Velomitor* CT Velocity Transducer
        190501 Velomitor?CT低頻速度傳感器,專為冷卻塔振動監測設計,轉速低至90rpm。
        常用型號:190501-01-00-00,190501-12-00-00,190501-10-00-01......
        190501 Velomitor* CT Velocity Transducer
        190501 Velomitor?CT低頻速度傳感器,專為冷卻塔振動監測設計,轉速低至90rpm
        GE Bently Nevada本特利 330505低頻速度傳感器

        330505低頻速度傳感器
        用于水力發電,檢測定子鐵芯、定子機座和軸承支撐的振動;
        常用型號:
        330505-01-02-02;330505-02-02-02
        330505-01-02-00;330505-02-02-00
        330505 Low Frequency Velocity Sensor
        330505低頻速度傳感器

        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
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