In the power engineering installation, the cable terminal head and the middle cable connector are important power equipment components in the power transmission cable line. Its function is to disperse the electric field at the cutoff of the cable terminal head shield and protect the cable from breakdown. With internal and external insulation and waterproof effect. In the cable line, more than 60% of the accidents are caused by accessories, so the quality of the fittings is very important for the safety and reliability of the entire power transmission.

1, the conductor connection The conductor connection requires low resistance and sufficient mechanical strength, the connection can not appear sharp corners. Low-voltage cable conductor is commonly used in crimping, crimping should pay attention to:

(1) Select the appropriate conductivity and mechanical strength of the conductor connecting pipe;

(2) The inner diameter of the crimping pipe and the outer diameter of the core to be connected with the take 0.8 to 1.4mm gap;

(3) The resistance value of the joint after crimping should not be more than 1.2 times of the conductor of the same section, the tensile strength of the copper conductor joint should not be lower than 60N / mm2;

(4) Before crimping, the outer surface of the conductor and the inner surface of the connecting pipe are coated with conductive glue, and the wire brush damages the oxide film;

(5) connecting pipe, core conductor sharp corners, burrs, etc., polished with a file or sandpaper smooth.

2, the semiconductor shielding process Where the cable body has an inner shield, the connector must be restored in the manufacture of connectors pressure conductor portion of the shield, the cable must be set aside part of the internal semiconductor shield in order to make the connector on the connector The inner shields are able to communicate with each other to ensure the continuity of the inner semiconductors so that the field strength at the joint connector is evenly distributed.

3. Outer Semiconductor Shielding Outer semiconductor shielding is a semi-conductive material that acts as an even electric field on the outside of the cable and cable connector insulation. As with the inner semiconductor shield, it plays a very important role in cables and connectors. The external semiconductor ports must be neat and uniform and also require a smooth transition to the insulation and the semiconductor tapes are wound around the cable gland and the semiconductor shield on the outside of the cable.

4, the cable reaction cone processing construction shape, make inch accurate reaction cone, in the entire cone surface potential distribution is equal, in the production of cross-linked cable reaction cone, the general use of special cutting tools, can also be used Micro heat slightly heating, cutting with a sharp knife, the basic shape, then 2mm thick glass repair scratch, and finally sandpaper from coarse to fine grinding until smooth.

5, metal shielding and grounding metal shield in the role of the cable and connector is mainly used to conduct short-circuit current cable fault, as well as the electromagnetic shielding electromagnetic field near the communications equipment, metal shield in good grounding in the operating state at zero Potential, when the cable fails, it has the ability to conduct short-circuit current in a very short period of time. Grounding wire should be reliable welding, metal shield and armored belt on both ends of the cable box body firmly welded, the grounding of the terminal should be reliable.

6, the joint seal and mechanical seal The seal and mechanical protection is to ensure safe and reliable operation of the joint protection. Should prevent infiltration of moisture and moisture within the cable connector, the other in the joint position should be built connector protection slot or install cement protection box.

Deutz Engine Spare Parts

Deutz Engine Spare Parts TD266B-6G with original quality and best price.

Automobile engine overhaul mainly includes bai change valve, piston, Cylinder liner, or boring cylinder, grinding shaft, etc. According to the standard of the general 4S shop, dao all need to replace 4 sets, that is, piston, piston ring, valve, valve oil seal, valve guide, crankshaft bush, connecting rod bush, timing belt, tension wheel.
1. What are the major repair projects?
1. If it is the timing of the chain, it is necessary to change the timing chain and tensioner, except for machining, boring the lower sleeve of the cylinder, grinding shaft, cold-pressed pipe, and also need to replace the overhaul kit, the front oil seal and the rear oil seal , Camshaft oil seals, oil pumps, relatively researched valves, etc. Sometimes external parts need to be replaced, such as clutch plates. In short, all the parts that are not sure are replaced to repair the engine to ensure the use of the engine performance.
2. The mechanical part generally includes a set of valve intake and exhaust, a set of piston rings, a set of 4 cylinder liners (if it is a 4-cylinder engine), two thrust plates, and 4 pistons;
3. The cooling system generally mainly includes the water pump (corrosion of the pump blades or water seepage phenomenon in the water seal), the upper and lower water pipes of the engine, the large circulating iron pipe, the small circulating rubber pipe, the throttle water pipe (it must be replaced if it is aging and swelling), and temperature saving, etc.;
The fuel part generally mainly includes the upper and lower oil rings of the fuel injector and the gasoline filter; the ignition part: whether the high-voltage line is swollen or leaks, replace it, the fire piston; the upper and lower oil rings of the fuel injector, and the gasoline filter;
4. Ignition part: If the high-voltage line is swollen or leaked, replace it, fire piston;
5. The intake part generally mainly includes air filter;
6. Other auxiliary materials generally mainly include antifreeze, engine oil, engine oil grid, chemical cleaner, engine metal cleaner or all-purpose water;
7. The components to be inspected generally mainly include whether the cylinder head is corroded or uneven, crankshaft, camshaft, timing belt tensioner, timing belt adjusting wheel, timing belt, external engine belt and adjusting wheel, rocker arm or rocker arm Shaft, if it is a hydraulic tappet, check the hydraulic tappet more;
8. Cooling system part: water pump (corrosion of pump blades or water seepage phenomenon in water seal), engine upper and lower water pipes, large circulating iron water pipe, small circulating rubber pipe, throttle water pipe (it must be replaced if it is aging and swelling);
9. Fuel part: The overhaul kit includes cylinder gaskets and various oil seals, valve cover gaskets, valve oil seals, etc. and gaskets;
Engine overhaul projects generally mainly include overhauling the engine, external machining of cylinder head planes, boring cylinders, clearing water tanks, grinding valves, inserting cylinder liners, pressing pistons, cleaning oil circuits, maintaining motors, maintaining generators, etc.
2. Parts that need to be replaced for overhauling the engine
1. Valve oil seal package, one set of valve intake and exhaust, one set of plug ring, one set of cylinder liner, four pusher pieces, two large and small tiles, four plugs,
2. The cooling system generally mainly includes the water pump (the pump blade is corroded or the water seal has no signs of water seepage)
3. Engine upper and lower water pipes, large circulating iron water pipes, small circulating rubber pipes, and bone valve water pipes (must be replaced if they are not aging or shrinking);
4. The fuel part generally mainly includes the upper and lower oil rings of the injector and the gasoline filter;
5. The ignition part generally mainly includes whether the high-voltage line can be replaced without shrinking or leakage. The spark plug and the intake part generally mainly include air filter.
6. Other auxiliary materials: antifreeze, engine oil; whether the cylinder head is corroded or uneven, crankshaft, camshaft, reverse timing belt tension pulley, reverse timing belt zero adjustment pulley, reverse timing belt, external engine belt and zero adjustment pulley, shake For the arm or rocker shaft, if it is a hydraulic tappet, check the hydraulic tappet. The overhaul kit includes cylinder gaskets and various oil seals, valve cover gaskets, valve oil seals, and gaskets.
Deutz Engine Spare Parts,Oil Cut Solenoid Of Excavator,Shutdown Solenoid Of Hitachi,Solenoid Valve Of Cat Excavator

Deutz Engine Spare Parts,Oil Cut Solenoid Of Excavator,Shutdown Solenoid Of Hitachi,Solenoid Valve Of Cat Excavator

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