Underwater motor bearing complex load

Abstract

The invention discloses a underwater motor bearing a complex load. The underwater motor comprises an output shaft, a shell, angular contact bearings, a coil, magnetic steel, a compaction ring, a control board card, a tail baffle plate, a watertight socket, a balanced film plug, a pressure balance film and insulating oil. A front end of the shell is provided with the angular contact bearings. A middle portion of the output shaft is provided with the magnetic steel and a tail end is coupled to the compaction ring through the angular contact bearings. A peripheral shell of the magnetic steel is provided with the coil. A rear end of the shell and the tail baffle plate are sealed and fixed together in a screw joint mode. A front end of the tail baffle plate is equipped with the control board card, and a rear end is equipped with the watertight socket, the balanced film plug and the pressure balance film. The two angular contact bearings are arranged on the output shaft in a wide surface towide surface mode. The insulating oil is injected into the shell. In the invention, through the wide surface to wide surface mode, the angular contact bearings are arranged; the insulating oil is filled into a motor shell chamber and the pressure balance film is arranged so that internal and external differential pressure is reduced and simultaneously a capability of the underwater motor to bear the complex load is increased; and heat dissipation is effectively performed and self-weight is reduced.

Description

technical field [0001] The invention relates to the technical equipment field of underwater motors, in particular to an underwater motor bearing compound loads; it is mainly applicable to the fields of underwater propellers, underwater mechanical arms and other underwater actuators. Background technique [0002] With the continuous development of marine technology and equipment, motors are more and more widely used in underwater robots, mainly in underwater propellers, underwater robotic arms and other underwater actuators. There are the following key technical problems in the application of motors to underwater robots: [0003] The first is the sealing problem. If the coils and other electronic components on the motor are exposed to water, they will short-circuit. In the prior art, the underwater motor generally uses the motor housing as the pressure-bearing part, and the wall thickness increases with the increase of the depth of use, which not only increases the weight of...

AI Technical Summary

Problems solved by technology

[0003] The first is the sealing problem. If the coils and other electronic components on the motor are exposed to water, they will short-circuit

In the prior art, the motor shell is generally used as the pressure-bearing part of the underwater motor, and the wall thickness increases with the increase of the depth of use, which not only increases the weight of the motor, but also deteriorates the heat dissipation environment of the motor

[0004] The second is the problem of bearing load. The operating environment of underwater robots is complex, and the loads they bear are also relatively complicated. Especially the underwater robotic arm may bear axial force and bending moment in addition to normal torque.

At present, the output shaft of the underwater motor can only bear torque and a small axial force and bending moment. Therefore, the underwater motor often fails to work normally due to the misalignment and deformation of the output bearing due to the axial force and bending moment. Fault

[0005] The third is the lightweight problem, that is, to reduce the weight of the motor itself, the carrying capacity of the underwater robot is very limited, so the weight of the motor itself should be reduced as much as possible; in the prior art, the weight of the underwater motor mainly comes from the shell, coil and heat dissipation The weight of the shell is mainly determined by the depth of the water used. The coil must consider the problem of the decrease in the current carrying capacity due to the increase in the temperature of the coil during operation (the wire of the coil needs to be thickened), and the radiator is also because Equipment necessary for increased coil temperature

Therefore, it is very difficult to reduce the weight of the motor

Images