Loader function and construction technology future development trend
1. In recent years, the wheeled loader has been centered around the application of new technologies, multi-functional machines, modular design and improved efficiency. It has continued to develop into large-scale and miniaturized 名媛直播, constantly launching new 名媛直播, and accelerating the replacement.
2. The working mechanism of the new structure is constantly emerging. The hydraulic system of the working device uses a lifting limit device and a lowering automatic positioning device to avoid the high pressure and impact of the hydraulic cylinder at the end of the mechanical limit. The installed accumulator can absorb the impact load and The longitudinal sway of the whole machine has a damping effect; the current technology is more mature and widely used is the technical scheme of using electrical control to switch the pilot control circuit of the working hydraulic system.
loader repair
3. The design of the driver's cab The design of the driver's cab of the new wheeled loader fully considers the physiological needs of people. The arrangement of the instrument, the operating handles and pedals, the driver's seat, visibility, noise and vibration isolation, temperature adjustment, etc. are all in line with people's needs. Mechanical engineering enables drivers to operate in a comfortable, relaxed and safe environment and improve work efficiency.
4. Reduce the cost of construction projects for equipment users from the perspective of improving operating efficiency. Due to the continuous advancement of technology, performance and application of wheeled loaders, the reliability, maneuverability and adaptability of loading hard materials have been comprehensively developed, and it has become the main loading of construction engineering, transportation and water conservancy, and open-pit mines. device.
In the 21st century, automated and intelligent wheeled loaders with higher efficiency, more convenient maintenance and better comfort will be introduced to the market.
At present, the most commonly used transmission system in China is hydraulic mechanical transmission, so here we mainly talk about the variable speed device in hydraulic mechanical transmission.
Repair and maintenance of the shifter of loader
The gearbox is one of the important transmission components of the wheeled loader. It is responsible for transmitting the speed and torque from the engine to the final drive system, changing the transmission ratio between the engine and the wheels, and realizing the forward and reverse gears of the loader It can be operated and can cut off the power transmitted to the walking device when the engine is running, so as to meet the needs of loader operation and driving, and it is convenient to start and stop the engine safely. While important, he is also a relatively prone to malfunction.
During the working process of loader, the failure rate of the transmission due to improper use and maintenance has been high, especially when the maintenance and maintenance procedures are not strictly followed during the use, and the lack of timely inspection and daily maintenance will accelerate the damage of the transmission. And the formation of faults will even expand the hazards of fault consequences.
①: Common faults and inquiries of the loader gearbox:
1. When the gear is engaged, it cannot enter the gear smoothly. The reasons are:
(1) The pressure of the pressure valve is too low;
(2) The hydraulic pump works badly and the seal is not good;
(3) The hydraulic pipeline is blocked;
(4) Damaged and leaked clutch seal ring;
(5) The gear stem is not in place.
2. When the gearbox is shifting, the gear cannot be disengaged. The reasons are:
(1) The piston ring swells to death;
(2) The clutch friction plate is burnt out;
(3) The return spring of the clutch is invalid or damaged;
(4) The oil return line is blocked.
3. The gear has been engaged, but the loader runs weakly and cannot even walk. The reasons are:
(1) The friction plate is seriously worn and the gap is too large;
(2) The clutch automatic emptying valve is not tightly sealed, which reduces the pressure;
(3) The pipeline of the shift control valve is blocked;
(4) The shut-off valve cannot be returned;
(5) The positioning spring of the transmission valve is fatigued or broken, and the steel ball jumps;
(6) The piston ring of the clutch and the seal ring are seriously worn, which causes serious leakage.
4. The operating pressure is too low. The reasons are:
(1) Insufficient oil in the oil pan of the transmission;
(2) Oil leakage in the main oil passage;
(3) The gearbox filter is clogged;
(4) The steering pump (or hydraulic pump) is damaged, causing serious internal leakage;
(5) Improper pressure adjustment of the gearbox regulator valve;
(6) The spring of the lock pressure valve is invalid or broken.
5. The gearbox is automatically disengaged or disordered. The reasons are:
(1) The positioning device of the shift control valve fails, and the main cause of the failure is the serious wear of the positioning steel ball or the failure of the spring;
(2) Due to long-term use of the shift lever, the position and length of the lever change, and the proportion of the lever is inaccurate, resulting in deviations in the operating position, resulting in misalignment.
②: Maintenance matters of the shifting device of loader:
