A hydraulic system for a rapid mooring device of an offshore operation helicopter, comprising a fuel tank, a hydraulic pump, an electric motor, a first check valve, a second check valve, a first pressure sensor, a second pressure sensor, a first filter, a second filter, a first overflow valve, a second overflow valve, a two-position four-way electromagnetic reversing valve group, a three-position four-way Y-type hydraulically operated reversing valve, a stacked double throttle check valve, a stacked internally controlled hydraulic lock, an externally controlled large flow hydraulic lock, a first safety valve, a second safety valve, a cartridge valve, an energy accumulator, a pneumatic hydraulic pump, a thick and thin parallel single rod hydraulic cylinder, a mechanical claw unlocking cylinder, a centering lock unlocking cylinder, and an emergency lock unlocking cylinder,
- wherein the thick and thin parallel single rod hydraulic cylinder comprises a thick hydraulic cylinder and a thin hydraulic cylinder;
- in oilways of the hydraulic system, an oilway connected to a port A of the cartridge valve is called as a load oilway;
- and an oilway connected to a port B of the cartridge valve is called as an energy accumulating oilway;
- the hydraulic pump is connected to the load oilway through the first check valve and the first filter;
- and the first pressure sensor is connected to an oilway between the first check valve and the first filter;
- the pneumatic hydraulic pump is connected to the energy accumulating oilway through the second check valve and the second filter;
- and the second pressure sensor is connected to an outlet oilway of the second filter;
- the first overflow valve and the second overflow valve are respectively connected to the load oilway and the energy accumulating oilway to prevent pressures of the oilways from exceeding a preset valve, so as to protect safety of the oilways;
- the thick hydraulic cylinder is connected to the load oilway through the stacked internally controlled hydraulic lock, the stacked double throttle check valve, a third electromagnetic reversing valve and a fourth electromagnetic reversing valve;
- ports A and B of the thick hydraulic cylinder are respectively connected to ports A of the third electromagnetic reversing valve and the fourth electromagnetic reversing valve through oilways on sides A and B of the stacked double throttle check valve and the stacked internally controlled hydraulic lock;
- ports P and T of the third electromagnetic reversing valve and the fourth electromagnetic reversing valve are respectively connected to the load oilway and the fuel tank;
- ports A and B of the thick hydraulic cylinder are respectively connected to the fuel tank through oilways on sides A and B of the externally controlled large flow hydraulic lock and are further connected to the fuel tank through the first safety valve and the second safety valve;
- control oilways on sides A and B of the externally controlled large flow hydraulic lock are uniformly connected to a port A of an eighth electromagnetic reversing valve, and ports P and T of the eighth electromagnetic reversing valve are respectively connected to the energy accumulating oilway and the fuel tank;
- the thin hydraulic cylinder is connected to the load oilway through the three-position four-way Y type hydraulically operated reversing valve, the first electromagnetic reversing valve and the second electromagnetic reversing valve;
- ports A and B of the thin hydraulic cylinder are respectively connected to ports A and B of the three-position four-way Y type hydraulically operated reversing valve;
- ports A of the first electromagnetic reversing valve and the second electromagnetic reversing valve are respectively connected to left and right hydraulically controlled oilways of the three-position four-way Y type hydraulically operated reversing valve;
- and ports P and T of the three-position four-way Y type hydraulically operated reversing valve, the first electromagnetic reversing valve and the second electromagnetic reversing valve are respectively connected to the load oilway and the fuel tank;
- a port A of the mechanical claw unlocking cylinder is connected to a port A of a fifth electromagnetic reversing valve;
- and ports P and T of the fifth electromagnetic reversing valve are respectively connected to the load oilway and the fuel tank;
- ports A of the centering lock unlocking cylinder and the emergency lock unlocking cylinder are connected to ports A of a sixth electromagnetic reversing valve and a ninth electromagnetic reversing valve;
- and ports P and T of the sixth electromagnetic reversing valve and the ninth electromagnetic reversing valve are respectively connected to the energy accumulating oilway and the fuel tank;
- and
- ports A and B of the cartridge valve are respectively connected to the load oilway and the energy accumulating oilway;
- and a control oilway of the cartridge valve is connected to a port B of a seventh electromagnetic reversing valve, and ports P and T of the seventh electromagnetic reversing valve are respectively connected to the energy accumulating oilway and the fuel tank.