The invention relates to the technical field of lubricating systems, and provides a wharf portal crane intelligent lubricating system which comprises an oil pump control circuit, the oil pump control circuit comprises an operational amplifier U1, a NAND gate U2, a NOT gate U3, a switch tube Q1, a switch tube Q2 and a resistor R4, the in-phase input end of the operational amplifier U1 is connected with Vref reference voltage, the output end of the operational amplifier U1 is connected with the first input end of the NAND gate U2, and the output end of the NAND gate U2 is connected with the first input end of the NOT gate U3. The input end of the NOT gate U3 is connected with the main control unit, the input end of the NOT gate U3 is connected with the second input end of the NAND gate U2, the output end of the NAND gate U2 is connected with the control end of the switching tube Q1, the output end of the NOT gate U3 is connected with the control end of the switching tube Q2, the first end of the switching tube Q1 is connected with a 24V power supply, and the second end of the switching tube Q1 is connected with a first terminal of an oil pump. The first end of the switch tube Q2 is connected with the second terminal of the oil pump, and the second end of the switch tube Q2 is grounded through the resistor R4 and connected with the inverted input end of the operational amplifier U1. According to the technical scheme, the problem that a power source of an oil pump works unstably in the prior art is solved.
本发明涉及润滑系统技术领域,提出了码头门机智能润滑系统,包括油泵控制电路,油泵控制电路包括运放U1、与非门U2、非门U3、开关管Q1、开关管Q2和电阻R4,运放U1的同相输入端连接Vref参考电压,运放U1的输出端连接与非门U2的第一输入端,非门U3的输入端连接主控单元,非门U3的输入端连接与非门U2的第二输入端,与非门U2的输出端连接开关管Q1的控制端,非门U3的输出端连接开关管Q2的控制端,开关管Q1的第一端连接24V电源,开关管Q1的第二端连接油泵第一接线端,开关管Q2的第一端连接油泵的第二接线端,开关管Q2的第二端通过电阻R4接地,开关管Q2的第二端连接运放U1的反相输入端。通过上述技术方案,解决了相关技术中油泵的电源工作不稳定的问题。
Intelligent lubricating system for wharf portal crane
码头门机智能润滑系统
2023-12-29
Patent
Electronic Resource
Chinese