The selection of universal reducers includes proposing usage conditions, selecting types, and determining standards.
In contrast, the selection of types is relatively simple, while accurately providing the working conditions of the reducer and mastering the planning, manufacturing, and application characteristics of the reducer are the key to the correct and reasonable selection criteria for universal reducers. The standard selection should satisfy conditions such as strength, thermal balance, and radial load acceptance of the shaft extension part.
1、 Selection criteria based on mechanical power or torque (strength verification)
The major difference between the planning and selection methods of universal reducers and specialized reducers is that the former is suitable for various professions, but the deceleration can only be planned according to a specific operating condition. Therefore, when selecting, users need to consider different correction factors according to their own requirements. Factories should label the motor power (not the rated power of the reducer) selected in practice; The latter is planned according to the specific conditions of the user, and the coefficients to be considered are generally considered during planning. When selecting, it is only necessary to be satisfied with the application power being less than or equal to the rated power of the reducer, and the method is relatively simple.
2、 Thermal balance verification
The allowable thermal power value of a universal reducer is determined based on the high equilibrium temperature allowed by the lubricating oil (usually 85 ℃) under specific operating conditions (generally 20 ℃, 100% per hour, continuous operation, and 100% power utilization). When the conditions are different, the corresponding coefficient (sometimes combined into a single coefficient) is used for correction.
3、 Check the radial load received by the shaft extension part
Universal reducers often require constraints on the large radial loads that can be accepted at the middle of the input and output shaft extensions, and should be verified. If the limit is exceeded, requirements such as thicker shaft diameters and larger bearings should be proposed to the manufacturing factory.
