School Bus Clutch Maintenance
1, the separation of the bearing and bearing housing lubrication Separation bearing oil shortage will burn or fall, will wear clutch clutch separation contact surface, the lack of oil in the bearing seat will return poor, resulting in flywheel, friction plate and pressure plate accelerated wear or even cracking; general car driving 4000-5000KM Lubrication once, if there is no oiling device, grease must be added to the separate bearing and the separate bearing seat when removing the gearbox or changing the clutch. If the disengaging bearing does not return quickly, the return spring must be added or the elasticity of the return spring must be increased; 2. Inspection of clutch production system The degree of freedom of the clutch pedal should be checked before going out every day. If there is no free stroke or if the free stroke is too small, the pedal will quickly feel resistance. This is not allowed. It will cause the release bearing to press the clutch and the pressure is insufficient, causing slipping and burning. malfunction. If there is no adjustment mechanism for the sub-pump push rod, the free stroke of the pedal is 3-6. The sub-pump push rod has an adjustment mechanism. The pedal stroke is 20-45. If it does not meet the requirements, it must be adjusted before use. 3, clutch control system adjustment As the friction plate wears off the clutch, the disengagement finger will retreat toward the gearbox and the pedal's free stroke will decrease. Without a free stroke, it is equivalent to half-clutch slipping and burning. Correct adjustment steps and methods: (1) The total pump clearance must be guaranteed to be 0.5-1mm. If the clearance is too large, the pedal stroke will be insufficient, which will directly affect the separation stroke of the sub-pump. The clutch separation is unclear and the wear is intensified. When the check valve of the master pump piston is closed, the high-pressure oil cannot return to the sub-pump and it cannot return to the position and the clutch plate is burned. When the clearance is too small, the total pump oil is not smooth, resulting in insufficient oil. It also shows that the separation course of the sub-pump is not difficult enough. Hanging gear. Adjustment method: Loosen the master cylinder and adjust the lock nut. After rotating the master cylinder push rod to hit the ball socket on the master cylinder piston, use the lock nut as a reference to retract the 0.5 thread and lock the nut. Note: Different master cylinder adjustment methods may be different, but the master pump clearance must be guaranteed. (2) The adjustable sub-pump clearance must be guaranteed to be 5-7 mm (the corresponding clutch free travel is 3-5 mm). When the clearance is too large, the effective separation stroke of the clutch is reduced, which makes it difficult to separate the clutch. When the clearance is too small, the separation of the bearing and the clutch will cause the disengagement finger and the disengagement bearing to fluctuate. When the clearance is severe, the clutch is in the disengaged state, which is characterized by insufficient pressure, abrasion, and burning of the clutch plate. Adjustment method: remove the return spring on the sub-pump, loosen the sub-pump to adjust the lock nut, rotate the sub-pump push rod to disengage the disengaging bearing forward to the clutch disengagement finger (narrow push the sub-pump push rod can not move back and forth) Use the lock nut as a reference to retreat 3.5 threads and lock the nut. Then attach the return spring. Note: Different adjustable sub-pumps may have different adjustment methods, but the sub-pump clearance must be guaranteed. 4, clutch clutch disk timing replacement (1) The phenomenon that occurs when the driven disk is close to the wear limit: It is prone to slippage, start-up jitter, or clutch abnormal noise. (2) Driven disk replacement time period: slippery wear occurs every time the clutch is clutched, and the thickness of a single plate with a driven plate diameter of less than 300 allows 3.2 millimeters of wear, and the number of clutches is approximately 18,000; frequently-clutched buses are daily If the number of clutches is more than 500 times, you need to replace the clutch disc one month later. The number of clutches is about 100 times per day. After six months, replace the clutch disc. Users can change the timing according to the frequency of use. (3) Failure to promptly change the driven plate that wears to the limit. Consequence: The driven plate that wears to the limit will expose the rivet, and the rivet will damage the flywheel and the clutch platen. The responsibility is borne by the user.
The brazed Plate Heat Exchanger (BPHE) is a type of heat exchanger construction in which metal plates with flat surface offer an effective and efficient method of heat transfer. These plates are joined together by brazing (mainly copper), typically stainless steel. Due to the close contact between the two surfaces, there is a very high heat transfer coefficient, leading to a low overall unit size. They therefore provide much greater efficiency than a Shell And Tube Heat Exchanger.
Brazed Plate Heat Exchangers are widely used in air-conditioning and refrigeration, power generation, and other process applications. For example, within a cooling cycle, a BPHE can be used to transfer heat from one fluid to another. Typical fluids in such coils and systems are either glycol or water. In a power system, a BPHE can be used to cool oils, recirculating lubricants, fuels, and other fluids.
The major advantages of BPHE are their compact size, efficient heat transfer and minimal pressure loss. BPHEs also have low maintenance requirements and a long service lifetime. Furthermore, because of their flat surface design, BPHEs have no patterns or turns and thus lower energy costs and minimize fouling. Finally, the material used in BPHEs makes them resist to corrosion and heat, making them ideal for high temperature and hostile environments.
Brazed Plate Heat Exchanger,Brazed Phe,Brazed Type Heat Exchanger,Copper Brazed Heat Exchanger Guangdong Jiema Energy Saving Technology Co.,Ltd , https://www.heatexchangerjiema.com