The selection of reducer is a necessary work, and the user shall provide the following data: technical requirements, load cycle and operating conditions. In order to ensure that the functions of reducer meets the technical requirements, the selection, storage, installation, lubrication, operation and maintenance of the reducer shall be considered according to the company’s instructions. The systems connecting rotating parts must be compatible and not affected by critical speed, torsion and other forms of vibration within the specified speed range.

Normal supplies include:

Lip-sealed Dipstick on HSS

End Key Vent on HSS (if required)

Lifting Lug of Oil Drain Plug

Lip Seal on LSS

End Key on LSS (Solid Shaft)

End Plate, Retaining Ring and Shrink Disk Cover (Hollow Shaft with Shrink Disk)

End Plate, Retaining Ring and Shaft End Cover (Hollow Shaft with Keyway)

Normal supplies exclude:

End Plate Bolt and Shrink Disk (Hollow Shaft with Shrink Disk)

End Plate Bolt and Parallel Key (Hollow Shaft with Keyway)

Reducer Anchor Bolt

No oil in reducers delivered

Abbreviations:

LSS= Low Speed Shaft

HSS= High Speed Shaft

尺寸图中所用的插图说明

V. Selection method

1. Necessary parameters and conditions for gearbox selection

2. Calculation and method of selecting reducer

2.1 Transmission ratio

Calculate the transmission ratio _i=n1/n2. Select the similar nominal transmission ratio _in and exact transmission i in the power table.

2.2 Operating power _Pk1. _Pk2 and operating torque _Mk2
 

_Pk2 and _Mk2 are the necessary raw power and torque

Where η - efficiency, secondary drive η = 0.96. tertiary drive η = 0.94

2.3 Selection of speed reducer by coefficients

The selection of reducer must consider the load characteristics of the prime mover and the slave motor coefficient Fs, hourly start coefficient Fp and safety and reliability coefficient FR. PN1 in the selection power table must be greater than or equal to _Pk1xFsxFfxFr

P_n1≥P_k1xF_sxF_fxF_r

FR is a multiple of the load artificially increased for safety. Different industry applications, according to the industry's experience in the use of appropriate selection of FR.The table FR value is for reference only.

2.4 Calibration of thermal power

Thermal power PT, is the actual power, reducer continuous operation does not exceed +90 "C

_{Pt=PTHxf1xf2xf3xf4≥PK1}

Where: f1=elevation coefficient

f2=Installation position coefficient

f3=Installation structure type coefficient. Installation moment arm fa=1.07. other f3=1.0

f4=Lubrication mode coefficient. Pressure lubrication f4=1. 10,Oil immersion and ^splash f4=1.0

PTH=thermal power

Pk1=running power