電動執行器可靠性“規定的條件”
Electric Actuator Reliability "Prescribed Conditions"

天蝶閥門電動執行器重要的優點：
The important advantages of electric actuators:
在接近終點位置時可自動將轉速降到低，從而避免對閥門的沖撞。
When approaching the end position, the speed can be automatically reduced to a minimum to avoid collision with the valve.
實際工作力矩永遠不會超過設定的關斷力矩。
The actual working torque never exceeds the set cut-off torque.
柔性啟動功能和電磁制動功能可確保的控制質量-高控制精度。
The flexible start function and electromagnetic brake function ensure perfect control quality - high control accuracy.
而無需另配電機保護裝置。
No additional motor protection device is required.
安裝調試極為簡便快捷。
Installation and commissioning is extremely simple and quick.
啟動電流小于電機的額定電流，從而節省布線成本。
The starting current is less than the rated current of the motor, thus saving wiring costs.
防出錯接線方式
Anti-error wiring
的電子式電機保護功能。
Full range of electronic motor protection.
閥位控制優化 如閥位控制信號和閥位反饋信號偏差很大，則以快速 度運行，如偏差很小，則以低速運行
。Optimal valve position control If the deviation of the valve position control signal and the valve position feedback signal is large, the operation is performed at the fastest speed. If the deviation is small, the operation is performed at a low speed.
電動執行器的內置位置控制器可根據偏差大小 自動采用合適的輸出軸轉速。
The built-in position controller of the electric actuator can automatically adopt the appropriate output shaft speed according to the size of the deviation.
在制定采購計劃時，型號的不確定性 在制定采購計劃時，因現場的工況很難*掌握，所以 希望選定的型號到達現場后能盡可能接近實際需要。

When developing a procurement plan, the uncertainty of the model When preparing a procurement plan, it is difficult to fully grasp the conditions of the site, so it is hoped that the selected model will be as close as possible to the actual needs after arriving at the site. 
電動執行器的可靠性是指它在規定的條件下、規定時間內完成規定功能的能力。
The reliability of electric actuator refers to its ability to complete the specified function within the specified time and under the specified conditions.
“規定的條件”一般可概括為：
he "conditions stipulated" can generally be summarized as:
(1)環境條件：指能影響電動執行機構性能的環境特性，如溫度、濕度、氣壓、磁場、機械沖擊、振動、粉塵等。
(1) Environmental conditions: refer to the environmental characteristics that can affect the performance of electric actuators, such as temperature, humidity, air pressure, magnetic field, mechanical impact, vibration, and dust.
(2)動力條件：指能影響電動執行機構性能的動力特性。
(2) Dynamic conditions: refers to the dynamic characteristics that can affect the performance of electric actuators.
(3)負載條件：指能影響電動執行機構性能的負載特性，如力矩、被控對象的類型與特性等。
(3) Load conditions: It refers to the load characteristics that can affect the performance of the electric actuator, such as torque, the type and characteristics of the controlled object.
(4)使用和維護條件：電動執行機構的可靠性只有在使用中得以實現，并在維護中得到提高，對于使用和維護條件而言，首先要注意的是完善的使用和維護保養；其次是必須要求操作者達到相應的技術水平。
(4) Usage and maintenance conditions: The reliability of electric actuators can only be achieved during use and can be improved during maintenance. For use and maintenance conditions, the first thing to notice is the perfect use and maintenance; the second is The operator must be required to reach the corresponding technical level.
“規定的條件”是電動執行機構可靠性定義中重要而又容易忽略的部分。不同條件下，其可靠性是絕然不同的，離開具體條件談可靠性將毫無意義。而“規定的功能”是表征電動執行器構完成任務的各參量，如力矩、開/關及時間、行程、不動時間、死區等。
The "conditions stipulated" is the most important and most easily overlooked part of the reliability definition of electric actuators. Under different conditions, their reliability is absolutely different, and reliability will be meaningless without specific conditions. "Function" is the parameter that characterizes the electric actuator's task, such as torque, on/off and time, stroke, immobility time, dead zone, etc.
電動執行器在壽命期內的可靠性變化規律是研究其可靠性的基礎，取決于早期失效、隨機失效及耗損失效。理論上常用可靠度(R)這一定量指標來表征設備的可靠性，它是指設備在規定條件和時間內完成規定功能的概率。為簡便直觀起見，電動執行機構行業在實際使用時，簡單地用平均*時間(MTBF)來表征可靠性的特征量，并作為代表
The reliability change law of the electric actuator during its life is the basis for the study of its reliability, and it depends on the early failure, random failure and consumption loss. Theoretically, the reliability index (R) is used as a quantitative indicator to characterize the reliability of a device. It refers to the probability that a device performs a specified function within a specified condition and time. For simplicity and intuition, the electric actuator industry simply uses the mean time between failures (MTBF) to characterize the reliability of the feature and represents it.
電動執行器可靠性的性能指標。
電動執行器的可靠性一般受下列主要因素的制約與影響：系統選擇與設計、元件/組件適用性、動作參數、機械構造、制造技術、裝配度、運行與維護人員能力、操作與維護程序、操作正確性、維護結果、現場裝配與施工條件、備品性能的退化、運輸及使用影響等。
Electrical actuator reliability performance indicators.
The reliability of electric actuators is generally limited and influenced by the following major factors: system selection and design, component/component applicability, motion parameters, mechanical construction, manufacturing techniques, assembly accuracy, operation and maintenance personnel capabilities, and operation and maintenance procedures , Operational correctness, maintenance results, on-site assembly and construction conditions, degradation of the performance of spare parts, transportation and use effects.