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公开(公告)号：US4598188A
公开(公告)日：1986-07-01
申请号：US665714
申请日：1984-10-29
IPC分类号： H01H33/91 , H01H33/90 , H01H33/915 , H01H33/88
CPC分类号： H01H33/901 , H01H2033/906 , H01H2033/908 , H01H33/905
摘要： A movable and a stationary contact element are tubularly structured for the purpose of axially discharging arc gases. A blast nozzle is associated in a fixed reference position with respect to one of the contact elements. A narrowest location or throat of the blast nozzle is positioned forwardly of the end of this one contact element and is closed by the other contact element in the cut-on position of the gas-blast switch. An inlet of the blast nozzle communicates with a pump space bounded by a cylinder and a piston. The contact element with which the blast nozzle is associated displaceably extends through the piston. The pump space can be pressurized during a cut-off stroke. Both of the contact elements are provided with related outlets in their related regions which are remote from the free ends of the contact elements. At least in the cut-off position the outlets interconnect an interior space formed in the related contact element and a blow-out space. In order to utilize the pressure pulses occurring due to a switching arc, for supporting the pressure prevailing in the pump space, the outlet of the contact element, with which the blast nozzle is associated, opens into the pump space in the cut-on position and the distance of this outlet from the free end of the related contact element is greater than the pumping stroke between the piston and the cylinder which occurs during the cut-off stroke.
摘要翻译： 为了轴向排出电弧气体的目的，可移动的和固定的触点元件是管状构造的。 鼓风喷嘴相对于其中一个接触元件固定在参考位置。 喷嘴的最窄位置或喉部位于该一个接触元件的端部的前方，并且在气体鼓风开关的切入位置处的另一接触元件封闭。 喷嘴的入口与由气缸和活塞限定的泵空间连通。 与喷嘴相关联的接触元件可移动地延伸穿过活塞。 在切断行程期间泵的空间可以被加压。 两个接触元件在其相关区域中设置有远离接触元件的自由端的相关出口。 至少在切断位置，出口将形成在相关接触元件中的内部空间与吹出空间相互连接。 为了利用由于开关电弧而产生的压力脉冲，为了支持泵空间中的压力，与喷嘴相关联的接触元件的出口在开启位置开启到泵空间 并且该出口与相关接触元件的自由端的距离大于在截止冲程期间发生的活塞和气缸之间的泵送冲程。
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