Installation device for instrumentation device of stationary engine
A cylinder head of a stationary gas engine is provided with a cylinder internal pressure sensor. An engine frame is provided with an instrumentation device installation device. An amplifier for amplifying a signal detected by the cylinder internal pressure sensor is fixed to the instrumentation device installation device. The instrumentation device installation device includes a suspending tool formed of a fixing plate which is in contact with a horizontal plane and is fixed thereto by bolts, an extension plate bent at a right angle to the fixing plate, and a suspending plate bent at a right angle to the extension plate and arranged in parallel with the fixing plate, and a coil spring connected at one end thereof to the suspending plate, and connected at the other end thereof to a fixing band for holding the amplifier.
1. An installation device for an instrumentation device of a stationary engine, for mounting the instrumentation device to an engine frame,
the installation device comprising:
a suspending tool including a fixing part mounted and fixed to the engine frame, and an extension part connected to the fixing part and extending in a direction away from an engine frame surface; and
a spring member connected at one end thereof to the extension part, and connected at the other end thereof to a holding tool for holding the instrumentation device, the spring member being suspended by the extension part,
wherein the position in the spring member where the spring member is connected to the extension part is set at a position preventing the instrumentation device from coming in contact with the suspending tool even by a vibration of the engine frame, and the instrumentation device is suspended by the spring member with the spring member elongated by its own weight of the instrumentation device, and
wherein a natural vibration frequency of each of the spring member and the instrumentation device is set outside a resonance occurrence region with respect to a vibration frequency of the engine frame.
2. The installation device for an instrumentation device of a stationary engine according to claim 1 ,
wherein the instrumentation device is formed of a major axis cylinder body, the major axis cylinder body is suspended at a plurality of portions in the axial direction by a plurality of the spring members while maintaining a posture in a horizontal direction, and a natural vibration frequency of each spring member is adjusted, thereby to adjust the natural vibration frequency of the whole spring members.
3. The installation device for an instrumentation device of a stationary engine according to claim 1 ,
wherein the instrumentation device is formed of a major axis cylinder body, a lead wire is connected to opposite ends in an axial direction of the major axis cylinder body, and the major axis cylinder body is suspended by the spring member while maintaining a posture in a vertical direction.
4. The installation device for an instrumentation device of a stationary engine according to claim 1 ,
wherein the spring member comprises double coil springs concentrically disposed and wound in mutually opposite directions, and a natural vibration frequency of each coil spring is adjusted, thereby to adjust the natural vibration frequency of the whole spring members.
5. The installation device for an instrumentation device of a stationary engine according to claim 1 ,
wherein the spring member comprises a coil spring, and a natural vibration frequency of the coil spring is made variable by changing an axial pitch of the coil spring.