Shanghai schiak testing machinery Corp., Ltd.
Email: 66630177@163.com
Mobile: +86 195 2621 8985
Fax: +86 021-3102 9308
Address: No. 11, Lane 803, Shuangcheng Road, Baoshan District, Shanghai
Balance accuracy level | eω①②/(mm/s) | Rotor type |
G4000 | 4000 | The crankshaft transmission of a rigidly mounted low-speed marine diesel engine with an odd number of cylinders. |
G1600 | 1600 | Rigidly mounted crankshaft transmission of a large two-stroke engine. |
G630 | 630 | Rigidly installed crankshaft transmission for large four-stroke engines, and elastically installed crankshaft transmission for marine diesel engines. |
G250 | 250 | The crankshaft drive of a rigidly mounted high-speed four-cylinder diesel engine. |
G100 | 100 | The crankshaft drive of a high-speed diesel engine with six or more cylinders, the entire engine (gasoline or diesel) of cars, trucks and locomotives. |
G40 | 40 | Automobile wheels, wheel rims, axle seats, drive shafts, and elastically installed crankshaft transmissions for high-speed 4-stroke engines (gasoline or diesel engines) with six or more cylinders. |
G16 | 16 | Drive shafts (propellers, universal joint shafts) with special requirements, parts of crushers, parts of agricultural machinery, individual components of engines (gasoline or diesel engines of automobiles, trucks and locomotives), with 6 Engine crankshaft transmission with one or more cylinders. |
G6.3 | 6.3 | Refinery machinery parts, marine main turbine transmission mechanism (for merchant ships), centrifuge drums, and fans. The assembled aircraft's gas turbine rotor, flywheel, pump propeller, machine tool and ordinary mechanical parts, ordinary armature. Individual parts of the engine with special requirements. |
G2.5 | 2.5 | Gas and steam turbines, including marine main turbines (for commercial ships), rigid turbine generator rotors, turbine wheel compressors, machine tool transmissions, medium and large armatures, small armatures, and turbo drive pumps with special requirements. |
G1 | 1 | Drives for tape recorders and phonographs, drives for grinders, and small armatures with special requirements. |
G0.4 | 0.4 | Drive shaft, grinding disc and armature of precision grinder, gyroscope. |
①ω=2πn/60, when ω is in rad/s and n is in r/min, then ω≈1/10.
②For rigid rotors with two correction planes, 1/2 of the recommended residual unbalance is usually used for each plane; this value applies to two arbitrarily selected planes. The unbalanced state at the bearing can be improved. For a disc-shaped rotor, it is recommended that all residual unbalances be on a plane.
Note: 1. Low-speed diesel engines usually refer to machines with piston speeds less than 9m/s, while high-speed diesel engines are machines with piston speeds greater than 9.
2. The crankshaft transmission is a component. It includes crankshaft, flywheel, clutch, pulley, vibration damper, rotating part of connecting rod, etc. Therefore, for the engine, the rotor mass refers to the sum of the masses of the above components.