Флотационная машина стержневого типа XJB
XJB rod‑type flotation machine The XJB rod‑type flotation machine is similar to…
The main faults, their causes, and remedies during the operation of a jaw crusher are shown in Table 2-8.
Table 2-8 Main faults and their remedies
| Fault | Cause | Remedy |
|---|---|---|
| (1) Bearing temperature exceeds allowable limit; return oil temperature exceeds 60°C | 1) Bearing shell pressed too tightly; 2) Insufficient lubricating oil, oil line blocked, oil dirty; 3) Bearing scraping uneven | 1) Adjust the tightness of the bearing shell using shims; 2) Increase oil quantity, clean oil grooves and oil lines, replace lubricating oil; 3) Check if the shaft is installed correctly and scrape the bearing |
| (2) Water temperature discharged from the cooler exceeds 45°C | Insufficient cooling water; cooling system dirty | Supply water to the cooling system; clean the cooling system |
| (3) Oil flow indicator shows no oil flow | 1) Oil pump faulty; 2) Oil cold; 3) Valve closed too tightly | 1) Repair or replace the oil pump; 2) Heat the oil; 3) Check whether the valve is open |
| (4) Oil pressure in the supply system increases, with a corresponding rise in bearing and return oil temperatures | Oil pipe or oil grooves in crusher parts are blocked | Stop the crusher; clean the oil pipe and oil grooves in crusher parts |
| (5) Water enters the oil supply system | 1) Cooling water pressure in the filter-cooler is higher than the oil pressure in the supply system; 2) Cooling water pipe leaks | 1) Cooling water pressure should be 0.05 MPa lower than the oil pressure in the supply system; 2) Check and repair the leak |
| (6) Crushing plates vibrate, producing metallic impact sounds | Jaw plate liners loose | Stop the crusher; check the liner fixing; use a hammer to drive the fixing wedges on the side wall until fully seated, then tighten the fixing screws on the wedges and liners, or replace the support strips of the movable jaw plate |
| (7) Impact sound from the toggle plate support seat | 1) Insufficient spring tension or spring broken; excessive wear of the support seat; 2) Support seat loose | 1) Stop the crusher; adjust spring compression; replace the spring or support seat; 2) Tighten the support seat |
| (8) Impact sound from the connecting rod head | Eccentric shaft bearing liner worn | Rescrape the bearing liner or replace with a new one |
| (9) Crushed product size increases | Significant wear on the lower part of the liners | Turn the liners 180° or adjust the discharge opening |
| (10) After a loud cracking sound, the swing jaw stops swinging, the flywheel continues to rotate, the connecting rod moves back and forth, and the pull rod spring relaxes | 1) Toggle plate broken due to non-crushable metal, etc., falling into the crusher; 2) Connecting rod broken | 1) Replace the toggle plate; 2) Repair the connecting rod |
| (11) Flywheel rotates, crusher stops working, toggle plate comes out of the support seat | Spring broken, pull rod broken, pull rod nut stripped | Stop the crusher; inspect and replace damaged parts; reinstall the toggle plate |
| (12) Flywheel swings significantly; eccentric shaft rotates progressively slower | Key of pulley or flywheel loose or broken | Stop the crusher; replace the key; correct the keyway |
| (13) Impact sound from the lower part of the crusher | Spring of the pull rod has lost its elasticity or is broken | Replace the spring |
| (14) Vibration | Fastening screws loose, especially those of the assembled frame | Systematically tighten all connecting screws; if frame tension screws are loose, stop the crusher, preheat the screws in mineral oil to 150°C, then reinstall them |
