產品詳情 Product details

1.概述

速度開關結合了施耐德傳感器的先進技術和國內速度傳感器的實際應用開發而成（又名速度傳感器、低速開關、速度開關、打滑開關)本產品主要用于皮帶輸送機、提升機、螺旋輸送機、研磨機、破碎機、泵、離心干火機、攪拌機和除塵器等轉動設備，對皮帶打滑、皮帶斷裂、卡轉、慢轉、動軸剪切和過載、傳動鏈（帶）脫落等機械故障能及時處理，起到保護設備減少損失。

2.工作原理
速度開關不同于接近開關主要區別在于內部裝有延時電路，他可根據被動軸不同的轉速調整內部延時來達到保護設備的卡死堵轉，速度開關安裝在被動軸上如圖1他是通過裝在被傳動軸上的檢測片，利用電磁感應的原理給速度開關脈沖信號（當檢測片轉動到離速度開關4-8毫米距離時為一個脈沖），以圖一為例:通電瞬間速度開關通過串連的繼電器使繼電器吸合延時為設定的秒數，設備被動軸轉動一圈需要給速度開關兩個脈沖，如果速度開關設定在8秒，設備轉動一圈小于8秒，速度開關通過串連的繼電器無動作（繼電器保持吸合）當設備轉動一圈大于8秒，速度開關認為已發生卡死堵轉，通過串連的繼電器使電繼器跳脫（繼電器斷電），保護設備。

所有的傳動裝置，如螺旋輸送機、提升機、皮帶輸送機、拉鏈機、破碎機等都應在其被傳動軸處（機器尾端）進行安裝。

4.注意
安裝示意圖中旋轉速度監測儀的安裝位置視具體情況:而定，不必拘泥于圖，在不影響正常工作的前提下只要滿足“單位時間內給探頭間隔均勻的脈沖信號”這個條件即可。

5.主要技術參數

The speed switch is developed by combining the advanced technology of Schneider sensors and the practical application ofdomestic speed sensors(also known as speed sensors, low speed switches, speed switches, slip switches).This product ismainly used in belt conveyors, elevators, screw conveyors, grinders, crushers, pumps,centrifugal dryers, mixers and dustcollectors, etc.Mechanical failures such as shearing and overloading of the moving shaft, and falling of the transmission chain(belt) can be handled in time to protect the equipment and reduce losses.

2.Working Principle
The speed switch is different from the proximity switch.The main difference is that it has a delay circuit inside. lt can adjust theinternal delay according to the different speeds of the passive shaft to achieve the stall of the protection device.The detectionpiece mounted on the driven shaftuses the principle of electromagnetic induction to give a pulse signal to the speed switch (apulse when the detection piece rotates to a distance of 4-8 mm from the speed switch).The following figure is an example:Themoment the power is turned on, the speed switch makes the relay pull-in delay to a set number of seconds through a series ofrelays. One rotation of the passive axis of the device requires two pulses to the speed switch. The device rotates for less than 8seconds, and the speed switch does not operate through the serially connected relays (the relays remain closed). When thedevice rotates one turn for more than 8 seconds, the speed switch considers that a stall has occurred.The relay is tripped (relayde-energized) through a series of relays to protect the device.

3.Use & lnstallation
All ransmission devices, such as screw conveyors, hoists, belt conveyors,zippers, crushers, etc., should be installed at thedriven shaft (end of the machine).

4.Notes

The installation position of the rotation speed monitor in the installation diagram depends on the specifi situation it oes notneed to be constrained by the diagram.As long as it does not affect the normal work, it only needs to meet the condition of "pulsesignals uniformly spaced to the probe within a unit time".

5.Technical Parameters