Pumping Unit Gear Reducers-2

JLH Series Gear Reducer

JLH-500-9, JLH550-9H

Gear: 20CrMnTi alloy steel (carburized and quenched); Gearbox housing: HT250 gray cast iron (normalized); Shaft: 42CrMo alloy steel (quenched and tempered); Bearing: GCr15 bearing steel

1. Gear tooth surface pitting caused by impure lubricating oil and long-term alternating load; 2. Housing deformation caused by uneven foundation and installation deviation

1. Use high-purity industrial gear oil (NAS 7 level) and replace the oil filter element every 800 operating hours; 2. Calibrate the installation levelness before use (allowable deviation ≤ 0.2mm/m) and pad shims under the housing if necessary

JLH Series Gear Reducer

JLH-600-13, JLH600-13H, JLH640-13H

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Sealing ring: nitrile rubber

1. Oil leakage caused by sealing ring aging and high operating temperature; 2. Shaft shoulder wear caused by bearing end play deviation

1. Replace the sealing ring every 12 months and install a cooling fin on the housing to control temperature ≤ 75℃; 2. Check the bearing end play regularly (allowable range 0.02-0.05mm) and adjust with adjusting gaskets

JLH Series Gear Reducer

JLH-650-18, JLH650-18H, JLH-750-26

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Countershaft: 40Cr alloy steel

1. Countershaft bending deformation caused by sudden load impact (e.g., well sand plugging); 2. Gear meshing deviation caused by housing vibration

1. Install a torque limiter at the input end to avoid overload and clean the well in time if sand plugging occurs; 2. Fix the housing with anti-vibration bolts and check the bolt tightness every 7 days

JLH Series Gear Reducer

JLH750-26-31.71, JLH750-26H, JLH850-37H

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Bearing: GCr15 bearing steel

1. Bearing damage caused by insufficient lubrication and high-speed operation; 2. Gear tooth wear caused by dust intrusion into the gearbox

1. Inject lubricating oil into the bearing chamber every 15 days and check the oil level (maintain at 1/2-2/3 of the oil window); 2. Replace the air filter regularly and seal the housing joint with sealant to prevent dust intrusion

JLH Series Gear Reducer

JLH-850-37-48, JLH850-48H, JLH950-48

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Gear shaft: integral forging 42CrMo

1. Gear shaft fatigue crack caused by long-term continuous operation; 2. Lubricating oil degradation caused by high temperature, reducing lubrication effect

1. Arrange 2-hour shutdown rest every 24 hours of continuous operation and check the gear shaft for abnormal noise; 2. Replace the lubricating oil every 1500 operating hours and test the oil viscosity regularly

JLH Series Gear Reducer

JLH1000-53H, JLH-1000-73-53, JLH1000-73H, JLH1100-89H, JLH1200-105

Gear: 20CrMnTi alloy steel; Gearbox housing: HT300 gray cast iron; Shaft: 42CrMo alloy steel; Sealing ring: fluororubber

1. Housing crack caused by excessive load and poor heat dissipation; 2. Sealing ring damage caused by corrosive gas in the oilfield

1. Install a forced cooling system (cooling water jacket) for the housing and monitor the load in real time; 2. Use corrosion-resistant fluororubber sealing rings and check the housing for corrosion regularly

CJH Series Gear Reducer

CJH500×7, CJH600×13, CJH650×18, CJH750×26

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Bearing: GCr15 bearing steel

1. Gear meshing wear caused by improper installation of modular components; 2. Oil leakage caused by loose joint surfaces of modular parts

1. Follow the modular assembly manual during installation and check the meshing clearance (allowable range 0.15-0.25mm); 2. Tighten the joint bolts with a torque wrench (specified torque: 35-40N·m) and apply sealant

CJH Series Gear Reducer

CJH850×37, CJH850×48, CJH1100×53 II, CJH1100×53 I

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Sealing ring: nitrile rubber

1. Bearing wear caused by dust and sand entering the modular bearing chamber; 2. Gear tooth pitting caused by lubricating oil contamination

1. Install a dust cover at the bearing chamber inlet and clean the bearing chamber every 3 months; 2. Use a high-precision oil filter and replace the lubricating oil every 1200 operating hours

CJH Series Gear Reducer

CJH1100×73 II, CJH1100×73 I, CJH1100×89

Gear: 20CrMnTi alloy steel; Gearbox housing: HT300 gray cast iron; Shaft: 42CrMo alloy steel; Gear shaft: integral forging

1. Gear shaft wear caused by long-term alternating load; 2. Housing deformation caused by uneven ground in remote oilfields

1. Monitor the gear shaft runout regularly (allowable runout ≤ 0.03mm) and replace if excessive; 2. Level the installation ground with concrete and pad a shock-absorbing cushion under the housing

CJH Series Gear Reducer

CJH500-7, CJH600-13, CJH650-18, CJH750-26, CJH850-37, CJH850-48

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Countershaft: 40Cr alloy steel

1. Countershaft bearing failure caused by insufficient lubrication; 2. Sealing ring aging caused by extreme temperature in desert oilfields

1. Add lubricating grease to the countershaft bearing every 10 days and check the oil level; 2. Use high-temperature resistant sealing rings (operating temperature -40℃~120℃) and install a heat insulation cover in high-temperature environments

CJH Series Gear Reducer

CJH9*43.6*420, CJH3*43.6*420, CJH18*41.4*450

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Bearing: GCr15 bearing steel

1. Gear wear caused by small meshing clearance due to thermal expansion and contraction; 2. Housing joint leakage caused by vibration

1. Adjust the meshing clearance according to the ambient temperature (increase by 0.02mm for every 10℃ rise); 2. Use anti-vibration washers for the joint bolts and check tightness regularly

CJH Series Gear Reducer

CJH26*44.4*480, CJH37*45.8*560, CJH48*42.8*590

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Sealing ring: fluororubber

1. Gear tooth breakage caused by sudden overload; 2. Lubricating oil degradation caused by long-term non-replacement

1. Install an overload protector and avoid starting the pumping unit with load; 2. Formulate a fixed oil change plan (every 1000 operating hours) and test the oil quality regularly

API Standard Gear Reducer

API114, API160, API228

Gear: 20CrNiMo alloy steel (API Spec 11E compliant); Gearbox housing: HT250 gray cast iron (normalized); Shaft: 42CrMo alloy steel; Bearing: GCr15 bearing steel (API certified)

1. Gear surface corrosion caused by offshore salt spray environment; 2. Bearing damage caused by humid air intrusion

1. Spray anti-salt spray coating (API specified type) on the gear surface and housing; 2. Install a dehumidifier in the bearing chamber and check the humidity regularly (relative humidity ≤ 60%)

API Standard Gear Reducer

API320, API640, API912

Gear: 20CrNiMo alloy steel; Gearbox housing: HT300 gray cast iron; Shaft: 42CrMo alloy steel; Sealing ring: perfluoroelastomer (API compliant)

1. Sealing failure caused by chemical corrosion in high-sulfur oilfields; 2. Gear wear caused by sand particles in the oilfield air

1. Use API-specified corrosion-resistant sealing rings and check the sealing performance every 5 days; 2. Install a high-efficiency air filter and clean the gearbox internal every 6 months

JS Series Gear Reducer

JS950H, 1050H, 1200, 1280

Gear: 20CrMnTi alloy steel (precision grinding); Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Bearing: precision angular contact bearing

1. Gear meshing deviation caused by installation eccentricity; 2. Bearing wear caused by high-speed operation and insufficient lubrication

1. Use a laser alignment instrument for installation (alignment accuracy ≤ 0.01mm); 2. Use synthetic gear oil (API GL-4) and replace it every 1800 operating hours

JS Series Gear Reducer

J640D，456D，320D，228D，160D，114D, 912D

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Sealing ring: nitrile rubber

1. Oil leakage caused by sealing ring wear and vibration; 2. Gear tooth wear caused by lubricating oil contamination

1. Replace the sealing ring every 10 months and use anti-vibration bolts to fix the housing; 2. Install an oil purification device and check the oil cleanliness regularly (NAS 8 level)

JS Series Gear Reducer

JS-1200-912D, JS-1050-640D, JS-1000-456D

Gear: 20CrMnTi alloy steel; Gearbox housing: HT300 gray cast iron; Shaft: 42CrMo alloy steel; Gear shaft: integral forging

1. Gear shaft fatigue damage caused by long-term continuous operation; 2. Housing overheating caused by poor heat dissipation

1. Arrange 1.5-hour shutdown rest every 20 hours of continuous operation; 2. Install a forced air cooling system and monitor the housing temperature (≤ 70℃)

JS Series Gear Reducer

JS-950-320D, JS-850-228D, JS-750-160D

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 42CrMo alloy steel; Bearing: GCr15 bearing steel

1. Bearing failure caused by voltage fluctuation and unstable input speed; 2. Gear wear caused by dust intrusion

1. Install a voltage stabilizer and speed governor at the input end; 2. Replace the air filter every 3 months and seal the housing joint with high-temperature sealant

JS Series Gear Reducer

JS-650-114D, JS-550-80D, JS-500-57机, JS-450-40D, JS-420-25

Gear: 20CrMnTi alloy steel; Gearbox housing: HT250 gray cast iron; Shaft: 40Cr alloy steel; Sealing ring: fluororubber

1. Sealing ring damage caused by extreme low temperature in alpine oilfields; 2. Gear meshing wear caused by improper lubricating oil viscosity

1. Use low-temperature resistant sealing rings (operating temperature -50℃~100℃) and install a heating jacket in low-temperature environments; 2. Select lubricating oil with appropriate viscosity according to the ambient temperature (ISO VG 100 for low temperature)