In-line arrangement four-cylinder diesel engine balance mechanism

Abstract

The invention relates to an in-line arrangement four-cylinder diesel engine balance mechanism, which comprises a balance mechanism case and two balance shafts, wherein the two balance shafts are arranged inside the balance mechanism case through balance mechanism sliding bearings, the two balance shafts are both provided with balance blocks, balance shaft gears which are mutually engaged are respectively arranged on the balance shafts, the two balance blocks are uniformly arranged on the two balance shafts, the two balance blocks have different mass-radius products, the diameter of the balance block with large mass-radius product equals to the diameter of a dedendum circle of the balance shaft gear, both end surfaces of the balance shaft gear in the axial direction are provided with grooves, and balance block gravity center regulators are arranged in the grooves. Engine oil pumps are arranged on the flange surface of the balance mechanism case and can move. The invention has the advantages of reasonable structure, small vibration of the mechanism per se, low noise, convenient repairing and maintenance and long service life, and can realize the 100 percent balance of the secondary reciprocating inertia of the engine and the 19.51 percent inertia overturning moment counteraction. Through the test, the vibration intensity grade reaches grade B level, and the work noise is reduced by 5.0 dB(A).

Description

[0001] technical field [0002] The invention relates to a diesel engine balance mechanism, in particular to an in-line four-cylinder diesel engine balance mechanism. Background technique [0003] The engine should have low noise, good maneuverability, ride comfort, and ride comfort, while the diesel engine, due to the reciprocating inertial force and the overturning moment caused by it, will cause engine vibration. The vibration and noise of the engine directly affect the comfort of the vehicle and the structural strength of the engine. Excessive vibration will reduce the service life and performance of related parts. The in-line four-cylinder engine can achieve internal balance by reasonably arranging balance weights on the crankshaft. Through internal balance, the secondary reciprocating inertial force and overturning moment cannot be balanced, and a balance mechanism must be installed to achieve external balance. [0004] The in-line four-cylinder engine is generally eq...

AI Technical Summary

Problems solved by technology

[0007] The weights of the balance blocks on the balance shafts of the balance mechanism of the aforementioned two structures are equal, which can only balance the secondary reciprocating inertial force of the in-line four-cylinder diesel engine, and are powerless against the left and right vibration caused by the overturning moment of the diesel engine; the balance blocks are generally distributed at both ends of the balance shaft. The stress on the dangerous section of the balance shaft is relatively large, which is prone to fatigue damage

The long-term use of the balance mechanism is prone to wear and tear, and the vibration caused by the inertial force of the diesel engine cannot be effectively eliminated. It is necessary to add a device that can adjust the center of gravity of the balance weight, and regularly adjust the center of gravity of the balance weight; the transmission gear, intermediate gear and balance shaft gear Due to wear and vibration during the meshing process, the meshing gap between them becomes larger, which may cause gear meshing resonance and cause fatigue damage to the gears. It is also necessary to regularly adjust the meshing gap on the gear tooth side

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