受电弓是用来从接触网取得电能而引入机车的重要部件,因此受电弓的受流性能在很大程度上决定于接触压力。若压力太小,则接触电阻增大且易跳动,导致接触不良产生电弧;若压力太大则增加滑板和导线磨损,因此要求受电弓能保证滑板在工作高度范围内具有一定的接触压力并使上升压力与下降压力之差尽可能小。此外,还应使升降弓过程中初始运动迅速,运动终了比较缓慢,前者在降弓时可使受电弓很快断弧;后者可防止受电弓对接触网和受电弓底架有过大的机械冲击。以上所述受电弓的静特性和动特性试验要求必须通过试验台进行测试达到以下技术数据: Pantograph is used to obtain electricity from the catenary and the introduction of an important part of the locomotive, so the pantograph flow performance is largely determined by the contact pressure. If the pressure is too small, the contact resistance increases and easy to beat, resulting in poor contact arc; if the pressure is too large, increase the skateboard and wire wear, so the pantograph to ensure that the skateboard in the working height range with a certain contact pressure and Make the difference between rising pressure and decreasing pressure as small as possible. In addition, the process of raising and lowering the bow should also make the initial rapid movement, the end of the movement is relatively slow, the former in the bow down pantograph can quickly arc; the latter can prevent the pantograph on the catenary and pantograph chassis Excessive mechanical shock. The above pantograph static and dynamic characteristics of the test requirements must be tested through the test bench to achieve the following technical data: