Salt Water Test Strips,Drinking Water Test Kit,Water Bacteria Test Kit,Safe Home Water Test Kit Changchun LYZ Technology Co., Ltd , https://www.lyzstrips.com
Shipping:We ship goods by UPS/DHL/FEDEX/TNT express which is door to door,
takes 3~ 5 days to arrive
2. We can also help you ship by air cargo which you need to go to Air port to takehome,
it takes about 2-7 days to arrive
3. If goods are large quantity and you not need so urgently ,
you can choose by sea to save some freight cost which takes about one month to arrive
No matter what delivery way ,depending on your actual requirements
Agricultural Machinery Maintenance Six Methods
First, adjustment and transposition method Increase and decrease the use of gaskets, adjusting screws, elastic nuts and other methods to compensate for the wear of parts. For example: use the method of increasing and decreasing the gasket to adjust the gap of the worn conical spade bearing, use the screw to adjust the valve clearance, adjust the clutch to adjust the clutch clearance and so on. Replace worn part parts in one direction or position, ie continue working with unworn parts. For example, the left and right tractor drive wheel tires are used interchangeably; after the crawler tractor drive sprocket teeth are worn unilaterally, they are used interchangeably. Second, welding repair welding repair method is to use a certain method of welding parts repair. For example: The cylinder block, cylinder head, transmission housing and rear axle housing of the tractor are all made of high-quality cast iron. The metal consumables are large, the structure is complex, the machining accuracy is high, the manufacturing cost is high, and the cold welding method is used for repair. Cracks, breaks, and holes in these types of parts are economical and simple. Vibration and surfacing can be used to repair tractor shafts and wheels. Third, adhesive bonding and adhesive repair Adhesive bonding and adhesive repair is the use of adhesives to connect a variety of materials repair process. For example: using inorganic adhesive to repair cracks on engine cylinder heads, intake and exhaust valve lintels; use adhesive to fill small holes in the side walls of tractor body; corrosion pits near the sink hole are severely pitted and can be repaired by filling adhesives. Fourth, additional parts method Additional parts method is the use of a special part, assembled to the parts of the wear or damaged parts, to compensate for wear or damage parts, so that parts meet the technical requirements. For example: cracks in the cylinder block, can be used to screw holes in the body, add asbestos pads and pressure plate screw fastening method for plugging. When there are more than two buckles in the threaded hole or there is a large amount of looseness after the bolt is screwed in, the threaded hole can be enlarged, the steel screw plug can be screwed in, and the standard thread can be tapped in the inner hole of the screw plug. In order to prevent the looseness of the screw plug, a small hole can be drilled into the screw plug and the cylinder body to join the steel nail. Fifth, partial repair and replacement method Partial repair and replacement method is to replace or remove the damaged or worn parts of the parts, and then replace and manufacture some new parts so that they can meet the technical requirements for continued use. For example, some gear teeth can be individually repaired by inserts; individual rotary blades can be replaced by individual blades, and the rotor windings of the DC generator can be wound by winding the coil again. Sixth, the repair and recovery of some parts of the size method, especially more expensive, more complex design, in the course of the use of damage or natural wear exceeds a certain limit, so that it can not meet the technical requirements, can be achieved through mechanical processing The correct cooperation relationship is restored to the technical requirements. For example: crankshafts and bearings, due to burning tile or natural wear, their fit clearance and geometry exceeds the limit of use, through the grinding shaft, the use of increased bearing to make it meet the normal fit clearance; gear teeth wear or damage , It can be achieved by electric welding surfacing and machined after machining; precision upper part plunger sleeve upper surface, outlet valve seat lower surface, injector body lower end surface, fuel injector needle body End faces, etc. These end faces require a high degree of tightness. When the surface is rusted or uneven, it can be manually ground on a dedicated cast iron platform.