How to choose a suitable motor for XG series shaft mounted reducer

Choosing the appropriate motor for the XG series shaft mounted reducer is a systematic project that requires comprehensive consideration from four dimensions: power, structure, electrical, and environment. The following are detailed selection steps and key points:

Step 1: Matching core power parameters

This is the most crucial step in the selection process, which directly determines whether the transmission system can meet the load requirements and operate stably.

1. Determine load requirements

Load torque (T ₂): First, calculate the actual torque required for equipment (such as conveyor belts, mixers) to operate, in Newton meters (N · m).

Output speed (n ₂): Specify the speed required for the equipment to operate normally, in revolutions per minute (r/min).

2. Calculate and match key parameters

(1) Reduction ratio (i):

Determine based on the rated speed of the motor (n ₁, usually 1440 r/min or 1500 r/min) and the required output speed of the equipment (n ₂).

i = n₁ / n₂

The calculated speed ratio needs to be compared with the gearbox model table to select the closest standard speed ratio.

(2) Output torque (T ₂):

This is the core of verifying the capability of the gearbox. The "rated output torque" on the nameplate of the reducer must be greater than the actual load torque required by the equipment.

Calculation formula: Theoretical output torque T ₂=9550 × P/n ₂ (P is the motor power, in kW).

Safety factor: To ensure system reliability, a safety factor must be introduced (usually 1.2 to 1.5, with larger impact loads). When selecting, the rated torque of the reducer should meet the following requirements:

Rated torque of reducer ≥ load torque × safety factor

(3) Motor power (P):

Derive the minimum motor power required based on load demand and transmission efficiency.

Calculation formula: P ≥ (T ₂× n ₂)/(9550 × η)

P: Motor power (kW)

T ₂: Required torque for load (N · m)

N ₂: Load required speed (r/min)

η: Overall efficiency of the transmission system (considering the efficiency of the gearbox, usually 0.8-0.95 for gear reducers)

After calculation, select motors with standard power levels (such as 0.75kW, 1.5kW, 2.2kW, etc.) upwards.

Step 2: Match the structure and installation dimensions

The characteristics of shaft mounted reducers determine their special requirements for structural matching.

1. Confirmation of installation method

The XG series is shaft mounted, which means that the reducer is directly mounted on the spindle of the working machine and fixed to the frame through a torsion arm. When selecting, it is necessary to confirm that the gearbox model supports this installation method and obtain the corresponding installation dimension drawings.