What are the selection criteria for ZSY three-stage cylindrical gear reducer

The core of selecting ZSY three-stage cylindrical gear reducers is to ensure that the rated power of the selected model can meet the calculated power requirements under actual working conditions, and to verify the thermal power. The following are detailed selection steps and standards.

1、 Selection steps and standards

1. Clarify the basic operating parameters

Before selecting, you need to collect and clarify the following basic parameters:

Original engine information: name (such as electric motor), power P1 (kW), speed n1 (r/min).

Working machine information: name, required power P2 (kW), target speed n2 (r/min).

Transmission ratio: i=n1/n2.

Work system: daily working hours, hourly start-up frequency, and operating cycle.

Load characteristics: stable, with impact or severe impact.

Reliability requirements: average, high, or high.

2. Calculate the required power

The rated power of the reducer must meet the following formula, which is the core basis for selection:

Pc = P2 × KA × KS × KR ≤ PA

Pc: Calculate power, which is the actual power that the gearbox needs to withstand.

P2: Working machine power.

PA: The nominal input power of the gearbox (can be found from the manufacturer's sample or power meter).

KA: The usage factor is determined based on the characteristics of the load (stability, impact, etc.) and the working time.

KS: Start factor, determined based on the number of starts per hour.

KR: Reliability coefficient, determined based on the requirements for equipment operational reliability.

Simply put, you need to multiply the working machine power P2 by a series of coefficients based on the actual working conditions to obtain a calculated power Pc, and then select a gearbox model with a nominal input power PA greater than Pc.

3. Verify the thermal power

In addition to mechanical strength, the gearbox is also limited by thermal balance. When the gearbox operates at high speeds, heavy loads, or high ambient temperatures, thermal power verification must be performed to ensure that the heat generated by the gearbox can be effectively dissipated.

Conventional cooling: ZSY reducers generally use oil pool lubrication and natural cooling.

Forced cooling: When the thermal power cannot meet the requirements, it is necessary to use circulating oil lubrication or install auxiliary heat dissipation devices such as fans and cooling coils.

2、 General Technical Conditions for ZSY Reducer

When conducting selection calculations, it is necessary to ensure that the operating conditions meet the following basic technical conditions:

3、 Product Structure and Characteristics

Understanding the basic composition and characteristics of ZSY reducers can help you better select and maintain them.

Model meaning:

Z: Cylindrical gear

S: Three stage transmission

Y: Hard tooth surface.