Reversible water pump and hydroturbine

A reversible water pump and hydroturbine, comprising a housing and a rotor movably provided in the housing;

• wherein
• the housing comprises two end boards, which have same shape and are parallel-disposed oppositely, and a sideboard that connects the two end boards respectively;
• each end board is includes two coaxial semicircle boards having two different radiuses, that is, a large semicircular board and a small semicircular board are joined together at their diameter, wherein an axis hole is provided;
• the sideboard comprises a first round sideboard to seal two large semicircular boards completely, and a second round sideboard to seal two small semicircular boards completely, such that a first inlet/outlet and a second inlet/outlet, are formed at the ends of the first round sideboard;
• the rotor comprises a rotary shaft, a rotary wheel arranged on the rotary shaft, and two blades configured on an outer wall of the rotary wheel;
• a service channel is between two small semicircular boards, the second round sideboard and the rotary wheel, and a return channel is between two large semicircular boards, the first round sideboard and the rotary wheel, the radial cross section area of the service channel is identical to the area of the blades and is smaller than the radial cross section area of the return channel;
• the housing is provided with a first water-blocking apparatus at the return channel, near the first inlet/outlet, a second water-blocking apparatus at the return channel, near the second inlet/outlet, and a driving device to drive the first water-blocking apparatus and the second water-blocking apparatus in an open status or a close status alternatively, the relative angle of the first water-blocking apparatus and the second water-blocking apparatus disposed on the first round sideboard is between 60° and 120°.