Crankshaft balance structure
A technology of balancing structure and crankshaft, applied in the direction of counterweight, spring/shock absorber, vibration suppression adjustment, etc., can solve the problem of not completely balancing the first-level reciprocating inertia force, increasing the probability of engine parts failure, and not conforming to the design of aero-engine requirements and other issues, to achieve the effect of less quantity, longer service life and simple production
Pending Publication Date: 2019-02-15
芜湖钻石航空发动机有限公司
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Problems solved by technology
The rigid connection structure can only offset the rotational inertial force generated by the engine crankshaft, and cannot completely balance the primary reciprocating inertial force;
[0012] 3. With the balance shaft structure, multiple parts need to be added, which will inevitably increase the probability of failure of engine parts and reduce the safety of the engine
Therefore, adopting the balance shaft structure of the above-mentioned existing patented technology will have an important impact on the overall size of the engine, and will also increase the weight of the engine
This does not meet the design requirements of aero-engines
Method used
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[0037] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.
[0038] Such as Figure 1 to Figure 4 The structure of the present invention shown is a crankshaft balance structure, which is suitable for an aviation piston engine, and the crankshaft 1 includes a crank arm.
[0039] For aviation piston engines, light weight, small size and long life are required. Therefore, when designing the engine, it is necessary to reduce the weight and vibration as much as possible.
[0040] In order to overcome the defects and existing problems of the prior art and realize the invention purpose of reducing the vibration of the engine, the technical solution adopted by the present invention is:
[0041] Su...
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The invention discloses a crankshaft balance structure. The crankshaft balance structure is provided with a balance weight, a crank arm is provided with a mounting flange used for mounting of the balance weight, the balance weight is provided with a mounting groove matched with the mounting flange in thickness, a positioning pin hole is formed in the mounting flange, a connecting pin hole adaptingto the positioning pin hole is formed in the balance weight, and the balance weight and the mounting flange are connected through the positioning pin hole and the connecting pin hole and pin sleevesinserted in the positioning pin hole and the connecting pin hole. Through the technical scheme, the balance weight is assembled on a crankshaft through flexible connection, the functions of vibrationreduction and noise reduction can be effectively achieved, vibration of an engine can be reduced, the service life of the engine is prolonged, meanwhile, airplane driving comfort can be effectively improved, the number of parts is small, part manufacturing is easy, the structure has the obvious advantage of reducing the failure rate of an engine product, and meanwhile, safety of the engine is improved.
Description
technical field [0001] The invention belongs to the technical field of aviation piston engines. More specifically, the present invention relates to a crankshaft balance structure. Background technique [0002] Existing four-cylinder engines generally do not design a balance weight (shaft) structure. When the engine is in working condition, the movement speed of the piston is very fast, and the speed is very uneven. When the piston is at the top and bottom dead centers, its speed is zero, but the speed at the middle of the top and bottom dead centers reaches the highest. Since the piston performs repeated high-speed linear motions in the cylinder, a large inertial force will inevitably be generated on the piston, piston pin and connecting rod. Although counterweights on the linkage effectively balance these inertial forces, only one part of the moving mass is involved in linear motion and the other part is involved in rotation. Therefore, except for the upper and lower de...
Claims
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IPC IPC(8): F16F15/28
CPCF16F15/283
Inventor 卢东亮郑君胡崇波卞少春李琪周昊周佳
Owner 芜湖钻石航空发动机有限公司