2.2 Smooth flow

The oil spilled on the inner wall of the box must be allowed to flow back to the oil pool as soon as possible, and do not remain at the shaft head seal to prevent the oil from gradually leaching out along the shaft head. For example, an oil seal ring is designed on the shaft head of the speed-regulating reduction motor, or a semi-circular groove is glued to the upper cover of the speed-regulating reduction motor at the shaft head, so that the oil splashed on the upper cover flows along both ends of the semi-circular groove to the lower box .

2.3 Improve the shaft seal structure

( 1 ) Improvement of shaft seal of speed-regulating reduction motor with output shaft as half shaft

The output shaft of the speed-regulating reduction motor of most equipment such as belt conveyors, screw unloaders, and impeller coal feeders is a half shaft, which is easy to modify. Disassemble the speed-regulating reduction motor, remove the coupling, take out the shaft seal end cover of the speed-regulating reduction motor, machine a groove on the outside of the original end cover according to the size of the matching skeleton oil seal, and install the skeleton oil seal with the side with the spring facing inward. During reassembly, if the end cover is more than 35 mm away from the inner end face of the coupling, a spare oil seal can be installed on the shaft outside the end cover. Once the oil seal fails, the damaged oil seal can be removed and the spare oil seal can be pushed into the end cover, thereby This eliminates the need for time-consuming and laborious processes such as disassembling the speed-regulating reduction motor and disassembling the coupling.

( 2 ) Improvement of shaft seal of speed-regulating reduction motor with output shaft as whole shaft

The output shaft of the speed-regulating reduction motor driven by the whole shaft has no coupling. If it is modified according to the plan ( 1 ), the workload will be too large and it is unrealistic. In order to reduce the workload and simplify the installation procedure, a split end cover was designed and an open oil seal was tried. The grooves are machined on the outside of the split end cap. When installing the oil seal, first take out the spring, saw the oil seal into an opening, put the oil seal on the shaft from the opening, use adhesive to butt the opening, with the opening facing upward, and then install it. Load the spring and push in the end cap.

2.4 Use polymer composite materials

Polymer composite materials are materials composed of polymers, metal or ceramic ultrafine powders, fibers, etc., as base materials, and under the action of curing agents and curing accelerators. Various materials complement each other in terms of performance, creating a synergistic effect, making the overall performance of composite materials better than the original component materials. It has extremely strong adhesion, mechanical properties, and chemical corrosion resistance, so it is widely used in the repair of mechanical wear, scratches, pits, cracks, leaks, casting blisters, etc. on metal equipment and various chemical storage tanks. , chemical anti-corrosion protection and repair of reaction tanks and pipelines.

For leakage at the static sealing point of the speed-adjustable reduction motor, polymer composite materials and technology can be used to control the leakage on site without disassembly. Polymer composite materials are used to control the leakage externally, saving time and effort, and the effect is immediate. Its products have superior adhesion Strength, oil resistance and 350% stretch, overcome the impact of vibration of speed-adjustable reduction motors, and effectively solve problems that companies have been unable to solve for many years. If the static sealing point leaks oil during the operation of the speed-adjustable reduction motor, the oil level emergency repair agent of surface engineering technology can be used to stick and plug it, so as to eliminate the oil leakage.