SPARES FOR LANZHOU LS DRAW WORKS - 106.33.20.XX Series

1

106.33.20.01

High-strength alloy steel (42CrMo), quenched and tempered to HRC 38-42, corrosion-resistant coating

1. Long-term high-torque transmission causes fatigue wear; 2. Impurities in lubricating oil accelerate surface abrasion

1. Replace lubricating oil every 500 working hours, use ISO VG 46 grade industrial gear oil; 2. Install high-precision oil filters to remove impurities ≥5μm

2

106.33.20.02

Ductile iron (QT450-10) with nickel-plated surface, tensile strength ≥450MPa

1. Thermal expansion mismatch under alternating temperature; 2. Impact load during emergency braking

1. Avoid rapid temperature changes, preheat components to 40℃ before startup in low-temperature environments; 2. Adjust brake pressure to 0.6-0.8MPa to reduce impact

3

106.33.20.03

Aluminum bronze (CuAl10Fe3), anti-seizure and wear-resistant, suitable for heavy-load sliding friction

1. Insufficient lubrication leads to dry friction; 2. Misalignment of transmission shafts causes uneven wear

1. Apply molybdenum disulfide grease to friction surfaces before assembly; 2. Check shaft alignment with a dial indicator, control runout within 0.02mm

4

106.33.20.04

Stainless steel (304) with passivation treatment, corrosion resistance to salt spray ≥48 hours

1. Corrosion from drilling fluid (pH 7-11); 2. Vibration-induced loose fasteners cause secondary wear

1. Clean surface with neutral detergent after each shift, apply anti-corrosion spray; 2. Use lock washers and torque wrench to fasten, torque control at 35±2N·m

5

106.33.20.05

Polyether ether ketone (PEEK) composite material, heat resistance up to 260℃

1. Overheating due to poor heat dissipation; 2. Mechanical impact from foreign objects

1. Ensure cooling system flow rate ≥8L/min, clean radiator fins monthly; 2. Install protective covers to prevent foreign objects from hitting components

1

106.33.20.06

Semi-metallic friction material, friction coefficient 0.35-0.45, wear rate ≤0.15cm³/(N·m×10⁻⁷)

1. Frequent emergency braking causes high-temperature ablation; 2. Oil contamination reduces friction performance

1. Avoid continuous braking for over 3 seconds, allow cooling intervals; 2. Inspect seal rings regularly, replace immediately if oil leakage occurs

2

106.33.20.07

Carbon structural steel (Q235B) with galvanized finish, bending strength ≥235MPa

1. Fatigue cracking from repeated braking load; 2. Corrosion in humid offshore drilling environments

1. Conduct non-destructive testing every 1000 working hours to detect hidden cracks; 2. Use anti-rust oil in offshore operations, inspect every 30 days

3

106.33.20.08

Nitrile rubber (NBR) with shore hardness 70±5, oil resistance to mineral oil at 120℃

1. Aging and hardening due to high temperature; 2. Mechanical extrusion from improper assembly

1. Store spare parts in a cool dry place (temperature 5-25℃), shelf life ≤18 months; 2. Use special tools for assembly, avoid direct hammering

4

106.33.20.09

Tungsten carbide (WC-Co) alloy, hardness HRA 88-90, wear resistance 5 times that of steel

1. Impact damage from uneven braking force; 2. Oxidation at high temperature (above 600℃)

1. Adjust brake caliper clearance evenly (0.15-0.2mm); 2. Avoid braking system overheating, monitor temperature ≤200℃

5

106.33.20.10

Alloy steel (20CrMnTi) with carburizing treatment, case hardness HRC 58-62, core hardness HRC 30-35

1. Wear from meshing with gears under high load; 2. Improper lubrication causes tooth surface pitting

1. Use extreme pressure gear oil with EP additives; 2. Check gear meshing backlash monthly, adjust to 0.2-0.3mm

How to judge if 106.33.20.01 transmission components need replacement?

Check for three signs: 1. Transmission noise exceeds 85dB; 2. Surface wear depth ≥0.5mm; 3. Lubricating oil contains metal particles (detected by oil analysis). Replace immediately if any sign appears to avoid secondary damage.

Can the 106.33.20.06 friction pads be replaced with non-original parts?

It is not recommended. Non-original pads may not meet API Spec 7K friction coefficient requirements, leading to braking delay or failure. Original pads ensure consistent performance and compatibility, reducing accident risks in drilling operations.