This article introduces 5 vulnerable concrete mixer spare parts and their causes, and provides tips to avoid damage or maintain them.
1. Concrete mixer blades, Concrete mixer blade arm – Concrete mixer spare parts
During the operation of the mixer, concrete mixer machine spare parts are in direct contact with hard materials and are subject to reverse forces, resulting in wear, especially under high load conditions.
Improper use, such as mixing materials with larger particle sizes, or lack of regular maintenance and cleaning, can also increase wear on these components.
Therefore, when using a mixer, you must regularly maintain concrete mixer blades and concrete mixer blade arms. Do not wait until the parts are particularly severely worn before performing maintenance. Otherwise, these cement mixer spare parts will need to be replaced frequently, which will increase the cost of the equipment.
2. Concrete mixer liner plates – Concrete mixer spare parts
Concrete mixer liner plates will wear, mainly due to the friction of sand and gravel on the wall of the mixing drum, the reverse working pressure of the abrasive on the worn surface of the liner, and the tangential force of the abrasive on the worn surface of the liner. , specifically as follows:
Friction between sand and gravel on the wall of the mixing drum
Because the sand and gravel will produce relatively large friction on the wall of the mixing drum during the mixing process of the forced mixer.
Reverse working pressure of abrasive on liner wear surface
This force occurs when the abrasive is squeezed by the blade and liner, causing the sharp edges and corners of the sand to be pressed into the wear surface.
Tangential force of abrasive on wear surface of liner
This kind of force causes the abrasive to rotate in a circle at a certain speed when pushed by the agitator blade, causing corresponding radial movement between the abrasive and the wear surface of the liner, resulting in the abrasive drilling furrows on the liner. effect.
Solution for the above two types of wearing parts (concrete mixer blades, concrete mixer blade arm, concrete mixer liner plates)
For the above two types of wearing parts, it is necessary to clean up the mixture residues after the mixer is in operation and after one cycle of operation, and inspect the mixing shaft, mixing arm, and mixing knife. Thorough cleaning. When workers are cleaning, it is strictly forbidden to use a hammer to remove the mixture residue, because violent impact may cause the mixing knife to break.
3. Concrete Mixer Shaft Seal Kits – Concrete mixer spare parts
Low lubricating oil quality or failure of the lubrication system prevents the lubricating oil from fully functioning. If the lubricating oil is of poor quality and has poor fluidity, the lubricating oil pump will not absorb enough oil, which can easily cause concrete slurry to penetrate, and the lubricating oil passages and nozzles to become clogged, thus causing The main shaft end of the mixing station is leaking slurry.
The lubricating oil not only plays a normal lubrication role here, but more importantly, it plays a sealing role. When the lubricating oil fills all the gaps in the shaft end seal, the cement slurry cannot enter, which ensures that the shaft end seal can work normally with oil lubrication.
How to maintain mixer shaft seal kits?
Regularly inspect concrete mixer shaft seal kits
Regularly inspect the shaft seal package for any obvious signs of wear, damage or leaks. Make sure all fasteners, such as bolts and nuts, are securely tightened.
Replace wear parts
If any signs of wear, age, or damage are discovered during inspection, replace the seal immediately.
Clean and lubricate concrete mixer shaft seal kits regularly
Removing and lubricating accumulated dirt, concrete residue or debris around the area of concrete mixer shaft seal kits will prevent contaminants from affecting sealing performance.
4. Concrete solenoid valve – Concrete mixer spare parts
Solenoid valve circuit aging
The aging of the solenoid valve circuit of the mixing station is one of the main reasons for poor contact of the solenoid valve. Due to the harsh production environment, long-term working conditions will cause damage to the solenoid valve circuit, leading to circuit aging. In addition, the mixing station is susceptible to corrosion by water vapor and chemicals during operation, which is also one of the reasons for the aging of the solenoid valve circuit.
Damaged solenoid coil
Damage to the solenoid coil is also one of the main reasons for poor contact of the solenoid valve in the mixing station. Due to insufficient quality and processing technology of the coil itself, coil breakage is prone to occur after long-term use. Damage to the coil will cause the solenoid valve to not work properly, thus affecting production efficiency.
Improper junction box connection
During the installation process of the solenoid valve of the mixing station, improper connection of the junction box is also one of the important reasons for poor contact of the solenoid valve. If the junction box connection is not tight or not in place, it will cause poor contact and cause the solenoid valve to malfunction.
Solution to poor contact of solenoid valve in mixing station
For the aging of the solenoid valve line of the mixing station, it is necessary to repair or replace the solenoid valve line, and re-weld or replace the aged or damaged parts. In this way, the replacement of old and new can be effectively solved.
Replace the coil
If the solenoid valve coil of the mixing station is seriously damaged and seriously affects production efficiency, the coil needs to be replaced. Be sure to choose good quality coils to ensure stable overall performance.
Check the junction box
When installing the solenoid valve of the mixing station, carefully check the connection of the junction box to ensure that the connection on the junction box is tight and in place without looseness or poor contact, and eliminate the problem of solenoid valve failure caused by improper connection of the junction box.
5. Gearbox for concrete mixer – Concrete mixer spare parts
Failure to properly use and protect oil seals
The oil seal plays a very important role in the maintenance of the gearbox for concrete mixer. It can prevent hydraulic oil from overflowing from the inside of the gearbox, and also prevent dust and other impurities from entering the gearbox and causing damage to the gears and bearings. However, many users use it improperly or fail to replace damaged oil seals in time, resulting in hydraulic oil leakage or gear damage.
Over pressurized start
There are many warning lights on the dashboard, including a pressure gauge. If there is not enough hydraulic oil, the mixer will not work properly, and someone will over-pressurize the equipment to start it. In this way, “pressure” causes the hydraulic system to be overloaded, which will increase wear on the gearbox and other parts, leading to equipment damage.
Incorrect use of gears
The mixer gearbox contains many gears and gear shafts, and different models of equipment have different specifications of gears and gear shafts. If the user does not use regular original gears or uses gears with incorrect specifications when replacing gears or repairing the gearbox, the gearbox will be overstressed and easily damaged.
How to maintain gearbox for concrete mixer
Check gearbox for concrete mixer regularly
Check the transmission regularly for signs of oil leakage, corrosion or damage, and for unusual noises. If there are any unusual noises during operation, as they may indicate potential problems with the gears or bearings that need to be addressed promptly.
Add hydraulic oil regularly and replace oil seals
Change the hydraulic oil regularly and ensure the oil level is appropriate. Replace worn or damaged oil seals promptly to prevent contamination of the gearbox and ensure good sealing.
Check gear teeth regularly for signs of wear, chipping or damage. Perform timely maintenance and replacement of internal gears and gear shafts.
Avoid overloading the concrete mixer beyond its specified capacity as this can put undue stress on the gearbox and cause premature wear.