According to the structure, pumps mainly have three

classes, including: gear pumps,

What are the basic conditions that constitute a

hydraulic pump?

The three main problems of a gear pump

are

$,$

$,$

To deal with the trapped oil, the usual solution is to

around the

meshing place. To deal with the problem of the leakage

between the gears and covers, the usual solution is to

design

bushing$/$shaft sleeve.

For a gear pump, the working pressure is $p=10$MPa,

the delivery $V=12m\frac{l}{r},q_t=24\frac{L}{m}in,$ Mechanical

efficiency ${}_m$ is $0\mathrm{.}8,$ Volumetric efficiency ${}_v$ is $0\mathrm{.}9$ ;

Try to solve:

the rotating speed of the pump $n$;

the output power $P_o$ and input power $P_i$;

the input moment $T$ of the pump $.$