The invention discloses a novel torque limiting valve and a hydraulic-control torque limiting system with the novel torque limiting valve. The novel torque limiting valve and hydraulic-control torque limiting system with the novel torque limiting valve comprises a torque limiting unloading valve and a torque limiting control valve. A control oil port of the torque limiting unloading valve is communicated with a control oil port of the torque limiting control valve. A first oil port of the torque limiting unloading valve and a second oil port of the torque limiting unloading valve are communicated with a first derricking cylinder through a one-way balance valve. A third oil port of the torque limiting unloading valve and a fourth oil port of the torque limiting unloading valve are communicated with a second derricking cylinder through a first bidirectional balance valve. A fifth oil port of the torque limiting unloading valve is communicated with a telescopic cylinder through a second bidirectional balance valve. A first oil port of the torque limiting control valve is communicated with a rodless cavity of the first derricking cylinder, and a second oil port of the torque limiting control valve is communicated with a rod cavity of the first derricking cylinder. The novel torque limiting valve and hydraulic-control torque limiting system with the novel torque limiting valve has the advantages that the unloading part of the torque limiting valve can control five actions; five groups of one-way valves and a hydraulic control one-way valve from a main oil way, the flow capacity is strong, the oil ways are independent, and interference does not exist.
Novel torque limiting valve and hydraulic-control torque limiting system with novel torque limiting valve
2015-08-19
Patent
Electronic Resource
English