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Protection Function Of Hydraulic Coupling

Ningbo E.H Hydraulic Co.,Ltd | Updated: Aug 14, 2017

The hydraulic coupling is composed of a transmission pump wheel and a transmission turbine, the transmission pump wheel 1 and the Power machine shaft connection, transmission turbine 2 and pump shaft connection.

The hydraulic coupling includes an inner sleeve and a coat of the coaxial bushing, and the outer circumference of the jacket is fixed with a brake disc, and the axis of the brake disc is coincident with the axis of the jacket. The hydraulic coupling of the invention has a brake disc installed on the outer circumference of the jacket, Hydraulic Couplings and the brake disc is controlled by the corresponding braking component to realize the braking or locking operation of the coupling.

Hydraulic couplings work smoothly, reliable, can be in a wider range of stepless speed regulation, can be self-lubricating, can make the power machine load-free start-up. Power machine speed is equal to pump speed, transmission efficiency is 95---97%, when the pump speed is reduced to 25---30%, Hydraulic Couplings the transmission efficiency is 68---70%, in the automatic control of the pump station, stop the pump often due to the inertia of the pump group and the backflow of water in the tube to cause the action of the hammer. However, the use of this structure, the need to add another hydraulic coupling and its internal oil, if the use of hydraulic coupling, the earth can reduce the water hammer (or hydraulic pump) coupling cold oil equipment, such as the more complex

Structure and working principle of hydraulic coupling

The core parts of the hydraulic coupling are composed of a coupling sleeve, a shearing ring, a safety pipe and a pressure oil,

The combination structure of the hydraulic coupling and the drum type tooth coupling, the coupling sleeve 1 is a sealed double-layer sleeve, in which the outer diameter is connected with the drive shaft and the hub inner hole respectively. The pressure oil is injected into the coupling sleeve by the injection port through the manual high-pressure oil pump, and then screwed tightly in the coupling sleeve on the safety tube 2, Hydraulic Couplings and the high-pressure oil 3 is sealed in the coupling sleeve. Under the action of oil pressure, the inner and outer diameter of the coupling sleeve is locked with the drive shaft and hub, and the transfer of the frictional force in the work is proportional to the pressure in the cavity. The size of the oil pressure in the cavity can be controlled by a manual high-pressure oil pump during installation. After the oil pressure is given, the limit value (called sliding torque) of the torque that can be transmitted is fixed. During the working process, Hydraulic Couplings when the working torque is greater than the sliding torque, the relative sliding between the coupling sleeve and the drive shaft is generated, the top of the safety pipe is connected with the axial shear Ring 4 shear, the coupling sleeve cavity pressure oil quickly leaked out, the oil pressure disappeared, the coupling sleeve and the shaft between the relative sliding, torque transmission interruption played a safe protection function. After replacing the safety tube and injecting the pressure oil again, Hydraulic Couplings it will be able to work again.

The safety element of the hydraulic coupling is not affected by the fatigue factor, and the driving torque stability is set. When the overload time is short (20ms or so), the protection performance is safe and reliable; by adjusting the injected oil pressure, the accurate overload protection torque value can be set, Hydraulic Couplings the replacement safety tube is convenient, the auxiliary working hours are shortened, the structure is compact, the quality is small, and it is easy to combine with other transmission


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