Routine Maintenance And Overhaul Of Sand Washing Machine

Routine maintenance and overhaul of sand washing machine

Sand washing machine is an indispensable important equipment in the production of sand and gravel, mainly divided into wheel type and spiral type. It can remove the dust on the sand and gravel surface, make the sand cleaner and better quality. Regarding the use and maintenance of the sand washer, we have received advice from friends, so this article has compiled the relevant content, and attached the troubleshooting points for bearing and shaft failures for your reference.

Installation Precautions

  • 1. The equipment should be installed on a horizontal concrete foundation and fixed with anchor bolts.
  • 2. When installing, pay attention to the main body and the vertical.
  • 3. After installation, check whether the bolts in all parts are loose, and tighten them if necessary.
  • 4. Configure the power cord and control switch according to the power of the device.
  • 5. After the inspection is completed, carry out a no-load test run, and the test run can be carried out normally.

Items to check before starting

Before starting, be sure to check the following points:

  • 1. Whether the transmission system of the sand washing machine is operating normally and the speed is complete.
  • 2. Whether the operation of the sand washer is sensitive and reliable.
  • 3. Whether the sand washing machine lubrication system is complete, the pipeline is complete, and the oil circuit is unblocked.
  • 4. Whether the electrical system of the sand washing machine is reliable and sensitive in performance.
  • 5. Whether the sliding part of the sand washing machine is operating normally, and whether each sliding part has serious tensile, grinding, bruising and crack damage.

Maintenance points in use

  • 1. Always check the oil level of the reducer, the tightness of the V-belt, the degree of gear meshing and lubrication, and whether the connecting fasteners are loose. The machine must be in a normal and stable working state. At the same time, it is necessary to fully lubricate each friction part, and regularly add grease.
  • 2. After using the lubricant for the first time for one month, the lubricant should be replaced in a timely manner. Filtering should be performed when filling. In the choice of lubricant model, the south should choose a higher viscosity lubricant than the north.
  • 3. The bearing part of the sand washer is a component that is easy to be damaged. It is subject to heavy wear during use, so regular maintenance is required, and lubricant is added regularly to increase bearing life. Generally check every 2 months of work, and should be replaced immediately when the wear is severe.
  • 4. For sand washing machines using rolling bearings, the bearing seats at both ends of the screw shaft must be checked frequently. Pay attention to the reliability of the bearing sealing device. If you find wear, water seepage, sand soaking, etc., stop the machine immediately, replace the sealing device, and use clean gasoline. Or kerosene carefully wash the bearings. Rolling bearings can generally be filled with oil every 5000 hours.
  • 5. In daily use, pay attention to the noise of the machine at any time; observe the operation and working conditions of the screw shaft, V-belt, sealing device, water pipe and other components at any time; check whether the motor and the gearbox are overheated, and whether the bolts in each part are tightened and many more.
  • 6. The gearbox should be cleaned and changed after 3-6 months of operation, and the bearing seat must be replaced with a new grease (calcium base) every 6-12 months.
  • 7. The electrical equipment of large sand washing equipment must have a reliable grounding device. In addition, the wires should be reliably insulated and housed in snake skin tubes. Always check the motor wiring for wear and leakage to avoid accidents.
  • 8. Seasonal maintenance of sand washing equipment is also very important. It is mainly to change oil, fuel oil, antifreeze, and increase refrigeration facilities.
  • 9. In the process of using the sand washing machine, there should be specialized technical personnel to take care of it, and the operators need to have certain skills. Before installation of the sand washing machine, the operator must be trained in technical operations to understand the principle and performance of the sand washing machine and be familiar with the operating procedures.
  • 10. When the sand washer is in operation, it is strictly forbidden for anyone to stand next to it, touch the body with hands, and perform operations such as adjustment, cleaning, and maintenance.
  • 11. Be equipped with the necessary maintenance tools, as well as lubricants and corresponding accessories.

The bearing of the sand washer is the key to the efficient operation of the entire equipment, and it is also the part that is easily damaged. Therefore, it is necessary to do maintenance work normally, and to perform maintenance work in a timely manner if a failure occurs.

Bearing troubleshooting

The shaft rotates through the bearing support. It is the most heavily loaded part and is also a part that is easy to wear.

  • ① Failure check

    Check during operation: When the rolling bearing is short of oil, you will hear the sound of "bone and bones"; if you hear a discontinuous sound of "stalks", the bearing steel ring may be broken. Sand and other debris in the bearing or slight wear of the bearing parts will cause slight noise.

    Inspection after disassembly: First check the bearing rolling elements, inner and outer steel rings for damage, rust, scars, etc., then pinch the inner ring of the bearing with your hand, and make the bearing flat, and push the outer rigid ring with the other hand. If the bearing is good The outer steel rim should rotate smoothly, without vibration and obvious stagnation during rotation, and the outer steel rim does not reverse after stopping. Otherwise, the bearing can no longer be used. Hold the outer ring with your left hand, pinch the inner ring with your right hand, and push it hard in all directions. If you feel loose when you push it, it is severely worn.

  • ②Troubleshooting

    The rust spots on the outer surface of the bearing can be erased with sandpaper No. 00, and then washed in gasoline; when the bearing is cracked, the inner and outer rings are cracked, or the bearing is excessively worn, the new bearing should be replaced. When replacing a new bearing, use the same bearing as the original model.

Shaft troubleshooting

  • ① Shaft bending

    If the bending is not large, it can be repaired by polishing the journal and slip ring; if the bending exceeds 0.2mm, the shaft can be placed under the press and pressurized and corrected at the bend. Light; if the bend is too large, a new shaft needs to be replaced.

  • ② journal wear

    When the journal wear is not great, the journal can be plated with chrome and then ground to the required size; when there is more wear, the journal can be overlay welded and cut on the lathe; if the journal is worn When it is large, it is also turned 2-3mm on the journal, and then a sleeve is placed on the journal while it is hot, and then turned to the required size.