Spring-Suspended Amplifier Vibration Isolation for Stationary Engines
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Solution Overview
Problem
Existing vibration isolating devices for instrumentation devices mounted on stationary engine frames are costly, complex, and have limited vibration isolating effectiveness, leading to resonance and potential faults or malfunctions due to inadequate attenuation of engine frame vibrations.
Innovation Solution
The use of elongated spring members to suspend instrumentation devices, setting their natural vibration frequency outside the resonance region of the engine frame vibrations, thereby enhancing vibration attenuation and preventing resonance between the engine frame and the instrumentation devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration isolating device with wires and floating stage is used to prevent vibration transmission, then the instrumentation device is protected from vibration, but the structure becomes complicated and installation space is required
Solution Approach 1:
The patent extracts the essential vibration isolation function from the complex floating stage structure and implements it through simple elastic elements (rubber bands or springs) that directly connect the instrumentation device to the engine frame, eliminating the need for wires, bases, and floating stages while maintaining vibration protection
Solution Approach 2:
The patent replaces expensive and complex vibration isolation mechanisms with inexpensive elastic elements (rubber bands or springs) that are simple to manufacture and install, achieving the same vibration isolation effect with much lower cost and structural complexity
2Reliability
If a vibration isolating device with wires and floating stage is used to prevent vibration transmission, then the instrumentation device is protected from vibration, but the device becomes expensive
Solution Approach 1:
The patent replaces expensive vibration isolation mechanisms with inexpensive elastic elements (rubber bands or springs) that are simple to manufacture and install, achieving the same vibration isolation effect with much lower cost and structural complexity
Solution Approach 2:
The patent extracts the essential vibration isolation function from the complex floating stage structure and implements it through simple elastic elements, eliminating unnecessary components and reducing manufacturing cost
3Ease of manufacture
If the instrumentation device is fixed via vibration isolating material with weight imposed on the cylinder body, then the device is mounted, but resonance occurs and vibration isolating effect is limited
Solution Approach 1:
The patent changes the key parameter of the elastic elements (rigidity, elasticity coefficient) to ensure that the natural vibration frequency of the instrumentation device system falls within the resonance occurrence region with respect to engine frame vibration, thereby avoiding resonance and improving vibration isolation effectiveness
Solution Approach 2:
The patent uses elastic elements that can dynamically adapt to vibration frequencies, allowing the system to operate effectively across varying engine speeds and vibration conditions while maintaining reliable vibration isolation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves the vibration isolating effect, reduces the risk of faults and malfunctions, and extends the lifespan of instrumentation devices by effectively suppressing vibrations and avoiding resonance, while maintaining a simple and cost-effective configuration.
Implementation Method 1
a spring member (36) which suspends the instrumentation device (22)
Implementation Method 2
a vibration isolating rubber plate (42) interposed between the outer circumferential surface of the amplifier (22) and the fixing band (38)
Data Source
Figure 1
Figure 2
Figure 3(A)~3(B)
AI summary
A cylinder head 14 of a stationary gas engine 10 is provided with a cylinder internal pressure sensor 18. An engine frame 12 is provided with an instrumentation device installation device 30A. An amplifier 22 for amplifying a signal detected by the cylinder internal pressure sensor 18 is fixed to the instrumentation device installation device 30A. The instrumentation device installation device 30A includes a suspending tool 32 formed of a fixing plate 32a which is in contact with a horizontal plane 16 and is fixed thereto by bolts 34, an extension plate 32b bent at a right angle to the fixing plate 32a, and a suspending plate 32c bent at a right angle to the extension plate 32b and arranged in parallel with the fixing plate 32a, and a coil spring 36 connected at one end thereof to the suspending plate 32c, and connected at the other end thereof to a fixing band 38 for holding the amplifier 22. By suspending the amplifier 22 by the coil spring 36, the vibration of the amplifier 22 is suppressed.