12/24 Volt DC hydraulic pump motors for sale, price cheap, 500W, 800W, 1.6 kW, 2.2 kW and 2.5 kW hydraulic pump motor for selection, hydraulic pump motor is widely used in dump trucks, fixed boarding bridges, lifting platforms, van wings, car lifts, vehicle headboards, etc. It has the characteristics of high speed and small rotational inertia, which is convenient for starting, braking, speed regulation and commutation.
Hydraulic motor and hydraulic pump, all with the help of sealing work in the capacity of the transformation to complete the kinetic energy, - the same with the flow distribution organization. Hydraulic motor in the keyed high-pressure liquid state effect, into the liquid cavity from the small increase, and the rotating components caused by the torque, in order to get rid of the load resistance torque, to complete the rotation; In addition, the motor back to the liquid cavity from the large shrinkage, to the car tank or pump suction pipe mouth back to the liquid, the work pressure is reduced. The pressure wave state continues to enter from the leakage port of the hydraulic motor, and discharge from the return port, then the motor rotor of the hydraulic motor rotates continuously and opens to the external work.
From the theory. In theory, in addition to the valve type hydraulic pump, other ways of hydraulic pump and hydraulic motor with cross, can be used. In fact, because the performance indicators and provisions are not the same, the same way the pump and motor in the structure is still different.
The hydraulic motor is keyed into the liquid containing the working pressure to promote its rotation, so it is necessary to ensure the original confinement, without having the ability of self-priming. While the hydraulic pump - generally must have self-priming ability.
Hydraulic motor should be able to forward and reverse, so the internal structure of the hydraulic transmission must be symmetrical. Hydraulic pump is generally all single-sided rotation, in the structure of the general do not have this limit.
Hydraulic motor speed than a large range, especially when the speed is relatively low, super piston hydraulic motor should be able to ensure that all the normal work, so should be selected with roller bearings or negative pressure rolling bearings, if the choice of gas pressure rolling bearings, it is not easy to produce grease film. And the hydraulic pump speed is relatively high, the general shift is small, there is no such provision.