1. Pumping unit shaking
Cause: Improper foundation construction
Solution: Correct according to the blueprint
2. Displacement between parts
Cause: Incorrect installation of the beam pumping unit
Solution: Correct improper assembly points according to the manual
3. Frame or horse head vibration, motor emitting uneven noise
Cause: Loose connection bolts between frame and base, gearbox and base, or base and foundation
Solution: Tighten all connection bolts and regularly check their tightness
4. Crank pin loose in crank hole or periodic noise due to axial displacement
Causes:
① Excessive horse head suspension point load, too many strokes
② Beam pumping unit imbalance
③ Improper connection between connecting rod and crank
④ Poor fit between crank pin and shaft sleeve pin hole
⑤ Dirty mating surfaces of crank pin and pin hole
Solutions:
① Readjust parameters according to the manual's technical specifications
② Adjust balance
③ Correct the assembly position of connecting rod and crank
④ Tighten lock nut, implement anti-loosening measures
⑤ Clean pin and pin hole
5. Connecting rod rubbing against crank or flat block
Cause: Skewed walking beam installation
Solution: Adjust walking beam to align its longitudinal centerline with the gearbox's longitudinal centerline
6. Broken connection between crank and gearbox crank shaft, crank violently jumping
Causes:
① Loose differential bolts on crank
② Damaged keyway or key on shaft
Solutions:
① Tighten differential bolts
② Replace with new key, install in a new keyway 90° from the old one
7. Bearing or bearing housing displacement
Cause: Loose bolts
Solution: Tighten bolts
8. U-bolt bending
Cause: Gap between walking beam support and shim plate
Solution: Tighten bolts
9. Walking beam axial displacement
Cause: Loose U-bolts
Solution: Tighten bolts
10. Brake failure or automatic braking
Causes:
① Improperly adjusted brake clearance
② Worn brake (brake pads)
③ Oil contamination on brake drum and brake band (pads)
Solutions:
① Adjust regulating nut to achieve required brake clearance
② Replace brake band (pads)
③ Clean brake drum and brake band (pads) with gasoline
11. Knocking sound in gearbox
Causes:
① Poor Beam pumping unit balance
② Loose fit between shaft gear and shaft, causing displacement
③ Excessive gear wear or breakage
④ Worn or damaged bearings
Solutions:
① Adjust balance
② Replace gearbox
③ Replace gearbox
④ Replace bearings
12. Severe pitting wear or scoring of gearbox gears under good lubrication conditions
Cause: Gear overload
Solution: Reduce load
13. Uneven wire rope tension in hanger
Cause: Wire rope jumped groove and got stuck
Solution: Adjust clearance between wire rope pulley, horse head arc plate, and wire rope pressure plate
14. Loose connection between hanger and polished rod
Cause: Mismatch between polished rod and rod clamp specifications
Solution: Use appropriate rod clamps
15. Belt loosening causing belt slippage
Causes:
① Worn clamp teeth
② Uniform belt elongation
③ Inconsistent belt lengths used
④ Loose fixation of prime mover slide rail
⑤ Oil contamination on belt pulley and belt
Solutions:
① Replace rod clamps
② Adjust center distance
③ Replace with a set of consistent length belts
④ Adjust center distance and tighten bolts
⑤ Clean belt and belt pulley
Vigor will provide you with a reliable solution, please contact us at info@vigorpetroleum.com.
