Following-type hydraulic damping device, system and method

Abstract

The invention provides a following-type hydraulic damping device, system and method, and relates to the field of damping equipment. The following-type hydraulic damping device comprises a hydraulic cylinder; one end of the hydraulic cylinder is connected with an elastic telescoping mechanism, and the other end of the hydraulic cylinder is connected with a ground rack fixing block through a lengthadjusting mechanism; the elastic telescoping mechanism comprises a telescopic rod which is coaxially in butt joint with the hydraulic cylinder and a spring which is coaxially arranged on the telescopic rod in a sleeving mode; the spring is correspondingly extended or contracted along with the action of the telescopic rod; and the length adjusting mechanism is used for changing the distance betweenthe hydraulic cylinder and the ground rack fixing block. The hydraulic cylinder is matched with the elastic telescoping mechanism so that hydraulic supporting force can be automatically adjusted according to the operation state of to-be-damped equipment, thus the frequency of an offset test system is adjusted, mechanical resonance of the equipment under parts of rotating speeds is reduced, and the equipment is overall protected.

Description

technical field [0001] The present disclosure relates to the field of vibration damping equipment, in particular to a follow-up hydraulic vibration damping device, system and method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Structural vibration of the low-speed diesel engine body is a common problem in the bench test process of this type of diesel engine. Running the diesel engine for a long time under excessive (exceeding the standard) structural vibration state will cause quality accidents such as component fatigue or even damage. [0004] The vibration of the main body structure of the low-speed diesel engine is directly related to the excitation force of the diesel engine, the speed of the diesel engine under each working condition, and the fixed structure of the diesel engine. Once the model of the diesel engine and the posit...

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Problems solved by technology

[0005] The inventors found that the current design of diesel engines is generally based on the input of the shipping environment. After the diesel engine is shipped, the body and the hull are reinforced and supported, so that the natural vibration frequency of the diesel engine is affected by the support of the hull, and the natural vibration frequency of the system is far away from the actual operation of the diesel engine. The frequency corresponding to the working condition, the vibration problem basically meets the standard

However, there is no condition to install a similar support structure for the diesel engine in the bench test run-in of the manufacturer. The diesel engine body is located on the ground rail platform, with a cushion of about 1 meter in the middle, and the bolts are fixed, so the resonance is obvious at some speeds; manufacturing The factory implements part of the reinforcement scheme, which has poor versatility and cannot adjust the natural frequency up and down according to the target value. When there are multiple models, the manufacturing cost is high, and it is difficult to meet the test requirements of diesel engine manufacturers.

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