天蝶閥門電動(dòng)執(zhí)行器的結(jié)構(gòu)說明
Structure description of Tandy Valve's electric actuator

電動(dòng)執(zhí)行器是由電動(dòng)機(jī)、減速器、力矩行程限制器、開關(guān)控制箱、手輪、機(jī)械限位裝置組成的。那么每個(gè)部位究竟有什么用呢，天蝶閥門小編帶您一起來看看吧。
The electric actuator is composed of motor speed reducer, torque stroke limiter, switch control box, hand wheel, and mechanical limiter. So what's the use each part? Let's take a look.

1、電動(dòng)機(jī)：電動(dòng)機(jī)是特種單相或三相交流異步電動(dòng)機(jī)，具有高啟動(dòng)力矩、低啟動(dòng)電流和較小的轉(zhuǎn)動(dòng)慣量，因而有較好的伺服特性。在電動(dòng)機(jī)定子內(nèi)部裝有熱敏開關(guān)做過熱保護(hù)，當(dāng)電動(dòng)機(jī)出現(xiàn)異常過熱(內(nèi)部溫度超過130℃)時(shí)該開關(guān)將控制電動(dòng)機(jī)的電路斷開以保護(hù)電動(dòng)執(zhí)行機(jī)構(gòu)，當(dāng)電動(dòng)機(jī)冷卻以后開關(guān)恢復(fù)接通，電路恢復(fù)工作。為了克服慣性惰走，電動(dòng)執(zhí)行機(jī)構(gòu)的電動(dòng)機(jī)控制電路均有電制動(dòng)功能.

1. Motor: The motor is a special single-phase or three-phase AC asynchronous motor, with high starting torque, low starting current and small moment of inertia, and therefore has better servo characteristics. The motor stator is equipped with a thermal switch for overheat protection. When the motor is abnormally overheated (internal temperature exceeds 130°C), the switch will control the motor circuit to protect the electric actuator. When the motor is cooled, the switch is turned back on. The circuit resumes work. In order to overcome inertial idleness, the motor control circuit of the electric actuator has an electric brake function.

2、減速器：角行程執(zhí)行機(jī)構(gòu)采用行星減速加渦輪渦桿傳動(dòng)機(jī)構(gòu)，既有較高的機(jī)械效率，又具有機(jī)械自鎖特性。直行程執(zhí)行機(jī)構(gòu)的減速器由多轉(zhuǎn)執(zhí)行機(jī)構(gòu)減速器配接絲桿螺母傳動(dòng)裝置組成。
2. Reducer: The rotary actuator adopts planetary reduction and turbo-worm transmission mechanism, which has high mechanical efficiency and mechanical self-locking characteristics. The reducer of the linear travel actuator is composed of a multi-turn actuator reducer and a screw nut transmission.

3、力矩行程限制器：它是一個(gè)設(shè)置在減速器內(nèi)的標(biāo)準(zhǔn)單元，由過力矩保護(hù)機(jī)構(gòu)、行程控制機(jī)構(gòu)(電氣限位)、位置傳感器及接線端子等組成。
3. Torque travel limiter: It is a standard unit set in the reducer, by the over-torque protection mechanism, travel control mechanism (electric limit), position sensor and wiring terminals and other components.

4、開關(guān)控制箱：在開關(guān)控制箱內(nèi)裝有PM電子位置定位器。
4. Switch control box: In the switch control box is equipped with PM electronic position locator.

5、手輪：在故障狀態(tài)和調(diào)試過程中，可通過轉(zhuǎn)動(dòng)手輪來實(shí)現(xiàn)手動(dòng)就地操作。
5. Hand wheel: In the fault state and debugging process, manual operation can be achieved by turning the hand wheel.

6、機(jī)械限位裝置：主要用于故障時(shí)以及防止手動(dòng)操作時(shí)超過極限位置保護(hù)。電動(dòng)執(zhí)行器的機(jī)械限位采用內(nèi)置扇形渦輪限位結(jié)構(gòu)，外形體積小，限位可靠;電動(dòng)執(zhí)行機(jī)構(gòu)的機(jī)械限位采用內(nèi)置擋塊型限位結(jié)構(gòu)，可十分有效地保護(hù)閥座、閥桿、閥芯。
6. Mechanical limit device: mainly used for failure and to prevent over-limit position protection during manual operation. The mechanical limit of the angular stroke electric actuator adopts a built-in fan turbine limit structure, small size, reliable limit; the mechanical limit of the electric actuator adopts a built-in stopper type limit structure, which can effectively protect the valve seat and valve Rod, spool.