Maintenance is an effective means to restore sprinkler performance and extend its useful life. However, in the actual operation process, some use and maintenance personnel have many wrong practices, which reduces the normal service life of the sprinkler. The following Xiao Bian uses the Zoomlion sprinkler as an example to summarize the maintenance of several sprinklers. 1, avoid oil only increase Oil is essential in the use of diesel engines, mainly for lubrication, cooling, and cleaning. Under normal circumstances, the loss of oil is not great, but it is very easy to pollute, thus losing the role of protecting the diesel engine. During the operation of the diesel engine, many contaminants (soot, coke, fouling, etc. resulting from incomplete combustion of fuel) will enter the engine oil. People often ignore the replacement of deteriorating oil, or do not thoroughly clean the oil passage during the replacement, so that mechanical impurities still remain in the sump and the oil path, resulting in some engine parts are always in a poor lubrication environment Operation to accelerate the wear of all parts. 2, avoid butter mess with smear (1) Grease the cylinder pad. Butter is a grease commonly used in the repair of construction machinery and can act as a lubricant and seal. However, it is a mistake to apply a layer of butter to the cylinder pad. This will directly affect the performance of the diesel engine. If the cylinder pad is greased during installation, when the cylinder head bolts are tightened, part of the butter will be squeezed into the cylinder water channel and the oil channel. When the grease remaining in the cylinder pad is working in the cylinder, due to the influence of high temperature, part of the grease will flow. The human cylinder burns, and the other part remains on the joint surface between the cylinder block and the cylinder head, which creates a gap between the cylinder pad, the cylinder head and the plane of the machine body. The high temperature and high pressure gas can easily impact the cylinder pad from this, destroying the cylinder pad, causing leakage. gas. In addition, the butter will produce carbon deposits at high temperatures for a long time, resulting in premature aging and deterioration of the cylinder mat. Therefore, do not apply butter when installing the cylinder head gasket. (2) Apply butter to tire nuts. In order to easily tighten the nuts and prevent corrosion, many repairmen apply oil to the bolts and nuts of the tires. This is actually a wrong practice. After the oil coating, the equivalent friction angle between the threads is reduced, and the self-locking performance of the bolt connection is deteriorated, which may cause the nut to loosen or even cause an accident. 3, avoid cylinder sleeve and piston new products without installation When replacing cylinder liners and pistons, the new cylinder liners and pistons are considered to be standard parts. They are interchangeable and can be used when they are installed. In fact, there is a certain tolerance range between the size of the cylinder liner and the piston. If the cylinder with the largest size is equipped with the piston with the smallest size, the fitting gap will be too large, resulting in weak compression and difficulty in starting. Therefore, the standard cylinder sleeve and piston size grouping code must be checked when reloading. The cylinder sleeve and the piston must be assembled so that the standard piston size grouping code is the same as the standard cylinder sleeve size group code. Only in this way can the two be guaranteed. With standard fit clearance. In addition, cylinders and pistons of the same grouping code should be installed at the same time, and cylinder plug clearance must be checked before installation. In order to ensure assembly standards, a test should be performed before installation to prevent the installation of counterfeit products. . 4, bogey does not check the plunger stroke margin In the satirical test of a plunger-type fuel injection pump, many maintenance personnel did not pay attention to checking the stroke allowance of the plunger. The so-called plunger stroke margin refers to the amount of movement that the plunger can continue to ascend after it is top-dead-centered on the camshaft. After adjusting the start time of fuel supply, the reason why the travel allowance is also checked is because the stroke allowance of the plunger is related to the wear of the plunger and the sleeve. After the plunger and sleeve are worn out, the plunger must move upwards for a while to start oil supply, thereby delaying the start of oil supply. When the adjustment bolt is screwed out or replaced with a thicker adjustment pad or spacer, the lowermost position of the plunger moves upwards, so that the stroke margin of the plunger is reduced. Therefore, when repairing and debugging the fuel injection pump, it is firstly necessary to check the travel allowance to determine whether the injection pump also allows adjustment. During the inspection, the following different methods should be used according to the different structures of the fuel injection pump: a) Turn the camshaft, push the plunger to the top dead center, remove the oil valve and valve seat, and measure with a deep vernier. b) After the plunger is topped to the top dead center, use a screwdriver to pry the spring seat of the plunger spring to raise the plunger to the highest point. Then use a thick gauge inserted between the plunger lower plane and the tappet adjustment bolt to measure. The standard travel distance of the plunger is about 1.5mm, and the limit stroke after wear is not less than 0.5mm. 5, avoid cylinder gap measurement is not allowed When measuring the cylinder gap, it cannot be measured in the direction perpendicular to the piston pin hole of the piston skirt, but measured in other directions. The structural characteristics of the aluminum alloy piston is that it is small and large, it is a cone, and the partial section is oval, so the cylinder gap along the circumferential direction is not equal. During the measurement, it is specified that the clearance in the direction of the long axis of the ellipse shall prevail, that is, the clearance of the piston skirt perpendicular to the direction of the piston pin hole shall be measured. This measurement is more convenient and accurate, and in the reciprocating motion, the direction of the piston skirt perpendicular to the pin hole of the piston is greatly abraded due to the effect of lateral pressure. Therefore, when measuring the cylinder gap, the piston skirt should be perpendicular to the piston. Pin hole direction measurement. Do you have any of the above five maintenance errors? If you have ever remembered the next correction, please do not make the same mistake when you do maintenance. Otherwise, it will reduce the normal service life of the sprinkler.
Material Selection:
1. Frame: 2MM thicknesses cold-roll Stainless steel.
2. Motor: Germany SEW brake motor (outer), power 0.75KW, power supply 220V.
3. Control system: Imported Japan Mitsubishi converter and PLC to control of electric box (150%1HZ)
4. Opening & closing speed: 0.6-1.5m/s (adjustable).
5. Safety Device: Korea Photocell Sensor, emergency stopping reaction when sensing obstacles.
6. Curtain: France high-density polyester fiber and the surface coating processing, thickness 0.8MM, variety colors can be chose: Red, yellow, blue, green, orange, gray, white, transparent, etc. Tensile strength: 4000/3500N/5cm, tear strength 600/600N. Fire-proofing level: German standard DIN75200 Usage temperature: -30 ° C +70 ° C.
7. Wind resistant: The Aluminium alloy Reinforce Girder to increase wind resistant effect.
8. Curtain replacement function: Aluminium alloy Reinforce Girder is loaded between 2 pieces Curtain, can be replaced easily if any curtain broken, save your cost.
9. Transparent window: 1.2MM thickness transparent PVC window, size and location is up to your request, more safer.
10. Seal: Seal brush are Installed inside the guides, and the special bottom design, to fit any uneven ground.
11. Cotrolling way: Push button + radar sensor, very convenient.
12. Limiting Switch: Mechanical limiting switch, easily and exactly.
13. Emergency STOP: With emergency stop button on control panel, can stop easily by
Hand once disconnect or accident
14 Fault recovery function: All Hongfa's production is with fault recovery function, system will self-recovery after power cut off.
15. Delivery time: About 7 business days with contract and deposit confirmed.
16. Pyament item: 50% before production, and the other 50% before shipment.
17. Warranty Details: We provide 12 months warranty for all doors and accessories (except man-made disasters, Irresistible natural disasters, ect^).
We have many professional engineers with rich experience, qualified products, perfect service system, and good cooperation relationship with many famous companies.
PVC high speed door, plastic roll up doors, high speed fabric roll up doors, high speed rolling doors, pvc roll up doors SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , https://www.hongfahsrd.com