What are the standards for changing oil in a deceleration motor?

What are the standards for changing oil in a deceleration motor?

The refueling standard of the gearbox is the core link to ensure its normal operation and extend its service life, involving multiple aspects such as lubricant selection, oil level control, oil change cycle, and operation process. The following is a systematic summary based on industry norms and technical standards:

Selection criteria for lubricating oil

Viscosity and type

Worm gear reducer: Priority should be given to using VG220~VG460 viscosity grade compression gear oil (ISO standard), and synthetic ester low-temperature oil should be used when the ambient temperature is ≤ -5 ℃. The oil product should contain ≥ 3% zinc dithiophosphate (ZDDP) anti-wear agent, with a four ball pressure value greater than 400N136.

Hard tooth surface gear reducer: N220 industrial gear oil or ISO VG220 lubricating oil is used at room temperature environment; High temperature/frequent start stop conditions require synthetic oils such as Mobil 632 and Shell 320, and mixing different types of oils is prohibited.

High speed worm gear (sliding speed VS>10m/s): Forced oil injection lubrication must be used, and the viscosity index (VI) of the lubricating oil should be greater than 1002810.

performance parameter 

Worm gear oil needs to match viscosity according to sliding speed:

VS ≤ 2.2m/s → N680 (viscosity 324cSt/50 ℃)

VS>12m/s → N220 (viscosity 114cSt/50 ℃)

 

Oil level control standard

General rules

Vertical installation of worm gear reducer: The oil level is between 1/3 below and 1/3 above the axis of the worm gear, with a range of 16.

Oil free window model: Inject oil at 85% of the volume indicated on the nameplate.

Special type requirements

Hardened reducer:

Horizontal: oil window centerline position (oil dipstick inserted into the bottom of the tank at a depth of 55-65mm)

Oblique installation: The oil level of the first plate is 285-300mm, and the oil level of the second plate is 215-225mm47.

Cycloid reducer: based on the centerline of the oil window

Oil change cycle and status monitoring

Oil change interval

Normal operating conditions:

Worm gear reducer: continuous operation for 2000 hours or 3 months; Intermittent use ≤ 6 months 16.

Hard tooth surface reducer: 8000 hours, 9 every 20000 hours thereafter.

Harsh working conditions:

Temperature>80 ℃: Cycle shortened by 30%.

Dust/high temperature environment: Check the oil quality every half month.

Oil quality monitoring

Monthly testing: If the moisture content is greater than 0.1% or the iron spectrum abrasive particles are greater than 500ppm, the oil should be changed immediately.

Oil pool temperature: temperature rise ≤ 35 ℃, high temperature ≤ 100 ℃ (worm gear) or 60 ℃ (hard tooth surface) 589.

 

 

4、 Refueling operation process standard

pretreatment

Shutdown cooling for more than 2 hours, oil temperature drops below 60 ℃.

Clean the oil inlet and outlet, and wipe them with a lint free cloth.

Oil injection specifications

Third level filtration: oil drum → fixed oil pot → oil injector (filter screen ≥ 200 mesh) 1.

Graded oil injection: speed ≤ 0.5L/min, complete 6 in 3 intervals of 10 minutes.

Cleaning requirements: Before changing the oil, rinse with the same brand of cleaning oil (30% rated oil) for 15 minutes and 3 cycles.

 

 

5、 Special working condition handling standards

Installation method adaptation

Vertical installation/reverse operation: Install auxiliary lubricating oil passage 36 on the non working side.

Multi level series system: equipped with pressure equalization tube anti siphon 1.

Environmental adaptability

If the temperature exceeds the range of -10 ℃~50 ℃: choose synthetic oil and adjust the viscosity to 9.

Long term disuse (>12 months): Lubricating oil must be replaced before resuming use

Sealing detection

After oil injection, run without load for 30 minutes. If the oil leakage rate is greater than 1 drop/minute, seal 6 needs to be replaced.