Magnetic-suspension swash plate type axial plunger pump

The invention discloses a magnetic-suspension swash plate type axial plunger pump and belongs to the field of coal bed methane mining. The magnetic-suspension swash plate type axial plunger pump comprises a pump casing, a bearing seat, a swash plate base, a cylinder body, a valve body, an adapter connector, a tapered roller bearing, a pump shaft, a magnetic swash plate, magnetic sliding shoes, a return plate, a return plate press head, a spring, a spring block piece, plungers, cylinder liners, connecting rings and liquid inlet/outlet valves. According to the magnetic-suspension swash plate type axial plunger pump, the magnetic swash plate and the magnetic sliding shoe structure with the same magnetic polarity are arranged, so that the magnetic sliding shoes can be suspended on the magnetic swash plate; contact sliding between the sliding shoes and the swash plate in the prior art is changed into non-contact sliding, accordingly, friction wear between the magnetic sliding shoes and the magnetic swash plate is avoided, and the service life of the plunger pump is prolonged; besides, the application field of the swash plate type axial plunger pump which can only operate in an oil medium is broadened, a new technology with low energy consumption is provided for discharge and recovery of a coal bed methane well, and a new path is provided for specialization of discharge and recovery equipment of the coal bed methane well.