压力继电器是把油压讯号转换成电气讯号的一种感触、发送装置,当油路中压力变化到预先规定的范围时,继电器动作,推动所控制的部分去完成各项使命。我们自己动手试制了动作压力为0.3公斤/厘米~2的压力继电器,装在球磨机润滑轴瓦的油路中,实现了轴瓦无油自动保护,使用效果很好。具体结构如图1所示,它 Pressure relay is a feeling of the hydraulic signal into an electrical signal, sending device, when the oil pressure changes to a predetermined range, the relay action to promote the control of the part to complete the mission. Our own trial of the operating pressure of 0.3 kg / cm ~ 2 pressure relay, mounted on the ball mill lubrication of oil in the oil, to achieve the bearing oil-free automatic protection, the use of good results. The specific structure shown in Figure 1, it