高粘度齿轮泵的止回阀、安全阀及吸排油口

译文：
止回阀与安全阀：在齿轮泵的输出管路上安装有一个止回阀，这样在检修泵及输出管道时，系统中的液体不至于倒流；齿轮泵带负荷停车时，在其输出管道内产生局部真空，可防止泵倒转。高粘度齿轮泵的出口管路上还设置安全阀等保护装置，这样一旦泵的出口通道发生堵塞，就可以打开安全阀卸压。安全阀可以与泵体或泵盖铸成一体，也可以单独装配。 吸排油口 ：高粘度齿轮泵的吸液口管径一般较大，有时采用扩散形吸液口来扩大低压区的容积，以降低入口液体的流速，减小泵的吸液阻力。这种结构还可以减小作用在轴颈及轴承上的径向力，延长高粘度齿轮泵的使用寿命。

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原文：
Check with the safety valve: the output of the gear pump equipped with a check valve on the pipe, so HH47 H47XF HDH47X butterfly buffering check valvethat maintenance pump and output pipes in the system liquid Bu Zhiyu back; gear pump with a load stop, when, in its output pipeline generate partial vacuum pump to prevent reverse. The export of high-viscosity gear pump tube on the road also set safety valve HQ41 sliding path roller type check valveor other protective devices, such a place once the pump exit routes blocked, you can open the safety valve pressure relief. Safety valve can be cast with the pump or pump cover one, can also be a separate assembly. Suction oil port: high-viscosityHQ44/45X slightly resistance ball-Like check valve liquid gear pump suction mouth diameter generally higher, sometimes in the proliferation of suction-shaped area of low pressure liquid port to expand the volume to reduce the entrance of liquid flow rate, reducing the pump suction fluid resistance. This structure can also reduce the role of the journal and bearing radial force on the extension of high-viscosity gear pump life.