Underwater motor bearing complex load

Abstract

The invention discloses an underwater motor bearing compound loads, which comprises an output shaft, a shell, an angular contact bearing, a coil, a magnetic steel, a pressing ring, a control board, a tail baffle, a watertight socket, a balance film plug, a pressure balance film, insulating oil; the front end of the housing is provided with an angular contact bearing, the middle of the output shaft is provided with a magnetic steel, the tail end is connected to the compression ring through an angular contact bearing, and the outer peripheral housing of the magnetic steel is provided with Coil, the rear end of the housing is sealed and screwed to the tail baffle, the front end of the tail baffle is equipped with a control board, the rear end is equipped with a watertight socket, a balance film plug and a pressure balance film; two angular contact bearings It is arranged on the output shaft in a wide-to-wide manner, and insulating oil is injected into the housing; in the present invention, angular contact bearings are arranged in a wide-end-to-wide-end manner, and insulating oil is filled in the motor housing cavity, and configured The pressure balance membrane reduces the pressure difference between the inside and the outside, and at the same time improves the ability of the underwater motor to withstand combined loads, effectively dissipates heat, and reduces its own weight.

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...

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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

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