電渦流測功機主要加載范疇

　　電渦流測功機是目前國內(nèi)先進的加載測功設(shè)備，主要用來測量各種動力裝置的機械性能。DW及DWD系列主要由旋轉(zhuǎn)部分(感應(yīng)盤)、擺動部分(電樞和勵磁部分)、測力部分和校正部分組成。

　　勵磁繞組通電后，產(chǎn)生一個閉合磁通。當感應(yīng)盤(齒狀)旋轉(zhuǎn)時，氣隙磁密隨之發(fā)生周期性變化，感應(yīng)出渦流，由于“渦流”和磁場的耦合作用，在轉(zhuǎn)子上產(chǎn)生制動力矩，而在電樞體上則產(chǎn)生與拖動力矩相同的轉(zhuǎn)矩，并經(jīng)裝在電樞體四氟上的力傳感器檢測出來，從而達到測試扭矩的目的。 在轉(zhuǎn)速測量上，采用非接觸式的磁電式轉(zhuǎn)速傳感器，將轉(zhuǎn)速信號轉(zhuǎn)換成電信號輸出。

　　本機適用于中、小型功率電機、汽車、內(nèi)燃機、燃氣輪機、水輪機、工程機械、林業(yè)、礦山、石油鉆采等機械的性能試驗，也可作為其它動力設(shè)備的吸功裝置消聲設(shè)備。

　　性能特點

　　結(jié)構(gòu)簡單，操作維護方便;

　　制動力矩大，測試精度高，工作穩(wěn)定;

　　轉(zhuǎn)動慣量小，動態(tài)響應(yīng)快;

　　與測控系統(tǒng)配套，可實現(xiàn)自動化操作。

　　性能指標

　　冷卻水壓：0.02～0.1Mpa。

　　測功機出水溫度：小于55oC

　　工作方向：左旋或右旋，連續(xù)工作。

　　扭矩測量精度：±0.4%F.S

　　轉(zhuǎn)速測量精度：±1r/min

　　Eddy current dynamometer is the advanced load dynamometer equipment, mainly used to measure the mechanical properties of various power plant. DW, and DWD series mainly by the rotating part (sensor plate), swing part (armature and the excitation part), part of the measuring and calibration components.

　　After the excitation winding power to produce a closed magnetic flux. When the sensor disk (dentate) rotation, the air-gap flux density in the ensuing cyclical changes, induced eddy current, due to "swirl" and the magnetic field coupling, in the rotor to generate braking torque, and in the armature body, while in produces the same torque and drag torque, and mounted on the armature by the force sensors on the body of PTFE detected, so as to achieve the purpose of testing torque. In the speed measurements, using non-contact magnetic-electric speed sensor, the output speed signals into electrical signals.

　　This machine suitable for medium and small-power motors, automobiles, internal combustion engines, gas turbines, turbine, engineering, machinery, forestry, mining, oil drilling and other mechanical performance tests, but also other power equipment can be used as the suction power device muffler equipment.

　　DW Series (disc) eddy current dynamometer

　　DWB Series (claw type) eddy current dynamometer

　　Features ：

　　Simple structure, convenient operation and maintenance;

　　Braking torque large, high accuracy, stable;

　　Moment of inertia is small, fast dynamic response;

　　Supporting monitoring and control system can realize automation.

　　Performance：

　　Cooling water pressure: 0.02 ~ 0.1Mpa.

　　Dynamometer water temperature: less than 55oC

　　Direction: L-or D, continuous work.

　　Torque measurement accuracy: ± 0.4% F.S

　　Speed Measurement Accuracy: ± 1r/min