WD618 Engine Cylinder Block
Engine block: 1. Cylinder assembly, including cylinder head, cylinder block and oil pan. Some engines divide the cylinder block into two parts, the upper part is called the cylinder block, and the lower part is called the crankcase. The function of the engine body is to serve as the assembly basis for various engine mechanisms and systems; 2. And many of its parts are components of the crankshaft connecting rod mechanism, valve mechanism, supply system, cooling system, and lubrication system. The cylinder head and the gas inner wall together form part of the combustion chamber, which is the part that withstands high temperature and pressure; 3. Crank and connecting rod mechanism, which includes piston, connecting rod, crankshaft with flywheel, etc. It is a machine part that withstands high temperature and pressure. It is a mechanism that converts the linear reciprocating motion of the piston into the rotational motion of the crankshaft and outputs power.
cylinder block:
| WG1500010385 | VG1500010393 | VG1500010383 | P161500010374B | AZ1095010036 | 612600900208 | 612600010816 |
| QH50-4211306 | AZ1246010049A | 612600090039 | AZ1095010033 | 612600090049 | QGT-53E/A | AZ1238010002 |
| 1000317453 | 1001621520 | 1001422600 | 1001615024 | 1000509039 | 1000481612 | 1000433064 |
| AZ1034010030 | 202-01102-6481 | 1001771331 | 1001621526 | 612600900131 | 202-01102-6464 | 201-01102-6455 |
| 4060393X | 5486618 | 1002015A36D | 61557010037A | 61560010095B | 612600011726 | 612600011729 |
| 612600900216 | 612630900009 | AZ1099010077 | AZ1099010081 | 1000479080 | 13065523 | 612600900145 |
| AZ1096010023 | QH50-42111306 | QH50-4211306 | 13054042 | 612600011720 | 612600011721HQL | 612600900150 |
WD618 EngineCylinder block introduction: The cylinder block assembly is a key component composed of the cylinder block and the crankcase. It is not only the assembly base of various mechanisms and systems of the internal combustion engine, but also many parts of itself are the crankshaft connecting rod mechanism, the gas distribution mechanism, and the supply system. , Cooling system and lubrication system components. Each hole, each surface and each other on the cylinder block assembly have high size, shape and position tolerance requirements, and its processing is very difficult. The pattern processing of the cylinder block assembly uses general-purpose process equipment, and the processing process can be divided into four stages: rough machining, semi-finishing machining of cylinder block and crankcase parts, finishing machining of cylinder block assembly components, and fine machining of key parts
Cylinder blocks and crankcases are typical box-type parts, and their machining references are preferably positioned with two pins. Therefore, before semi-finishing each part, first machine the 2-Ø15H7 holes on the bottom surface of the cylinder block and the crankcase, and at the same time semi-finish the bottom surface, so that one side consisting of the bottom surface of the two parts and the 2-Ø15H7 holes on the bottom surface is formed. positioning benchmarks. It should be pointed out that the rough datum of the 2-Ø15H7 hole is also the outer wall of cylinders 1 to 6. After the datum of two holes on one side is established, the machining size of each part should be converted to the size starting from the main positioning pin hole. The establishment principles of 2-Ø15H7 hole "process benchmark" are as follows:
①The distribution on the diagonal line should be as far as possible;
②The accuracy of the hole distance is ±0.005mm; Holes take a long time to penetrate during machining.
The function of the cylinder block:
It has sufficient strength and rigidity, and the deformation is small, so that the position of each moving part is correct, the operation is normal, and the vibration noise is small;
It has good cooling performance, and there is a cooling water jacket around the cylinder to facilitate Let the cooling water take away the heat;
Wear resistance to ensure that the cylinder block has sufficient service life. Cylinder blocks are mostly made of cast iron or aluminum alloy. The cost of aluminum alloy cylinder blocks is high, but it is light in weight and has good cooling performance, so it is more and more widely used. The body is the skeleton that constitutes the engine, and is the installation basis for the various mechanisms and systems of the engine. All the main parts and accessories of the engine are installed inside and outside, and bear various loads.
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