The invention relates to a mud turbo
alternator, which is used for providing power supply for the drilling instruments in the mine and comprises a
turbine, a
turboshaft, a sliding bearing, a magnetic
coupling outer
magnet rotor, a shielding case, a magnetic
coupling inner
magnet rotor, a generator and a case; A guide
pulley for guiding the mud is arranged above the
turbine; the inner
magnet rotor is arranged in the upper part of the magnetic
coupling outer magnet rotor and is coaxially connected with the generator; the shielding case is arranged between the outer magnet rotor and the inner magnet rotor; A standby high-temperature battery which is used when the generator is in failure or the pump is stopped is arranged in the upper
air cavity inside the case. The invention has the advantages that the device is the complete non-contact power transference, the complete static seal, the seal is safe and reliable, the hydraulic vibration is small, the pressure is even, the hydraulic performance of the worm wheel is good; additionally, the mud turbo
alternator is provided with a standby battery, therefore,, the operation is stable and reliable, the service life of the generator is long and the technology capability is good and the cost is low.