The invention relates to the field of submersible linear motors, in particular to a submersible
linear motor and a rotor thereof. The rotor of the submersible
linear motor comprises a rotor inner
pipe, wear-resistant magnetic conduction rings and magnets, wherein the wear-resistant magnetic conduction rings and the magnets are arranged on the rotor inner
pipe at intervals. The rotor inner
pipe is of a hollow structure. Oil passing passageways are arranged on the pipe wall. Oil guide grooves are formed in the end faces of the wear-resistant magnetic conduction rings. The oil passing passageways and the oil guide grooves are communicated with each other. The oil passing passageways and the oil guide grooves are communicated with each other, and therefore a circulation lubricating oil way is formed by the oil passing passageways, the oil guide grooves and a
stator inner cavity. When the submersible
linear motor rotor reciprocates to work, the
pressure difference is generated by the two ends of the submersible linear motor
stator inner cavity, and lubricating
oil can pass through the oil passing passageways of the rotor inner pipe, flows through the oil guide grooves in the end faces of the wear-resistant magnetic conduction rings and flows to the friction faces of the wear-resistant magnetic conduction rings and the
stator inner cavity to form a protection
oil film. By forming the protection
oil film, friction between the wear-resistant magnetic conduction rings and the stator inner cavity can be effectively relieved, and therefore the service life of the submersible linear motor is easily prolonged.