Lifeboat diesel engine self-adaptive test bed

Abstract

A lifeboat diesel engine self-adaptive test bed comprises a base, a loading device and two transverse sizing blocks. The two transverse sizing blocks are fixedly connected with four support seats andcorrespond to diesel engine mounting feet one by one; and at least two adjacent support seats in the four support seats are internally provided with adjusting devices. Each adjusting device is sequentially provided with a swivel nut, a fixing nut, a nut seat and a positioning pin from top to bottom, wherein the upper half section of the inner wall of the swivel nut is a thread, the lower half section of the inner wall of the swivel nut is a smooth hole, the upper section of the outer wall of a pipe is a hexagonal cylinder, the middle section of the outer wall of the pipe is a left-handed outerstud, the lower section of the outer wall of the pipe is a cylinder, an upper hole of the fixing nut is provided with a left-handed internal thread, a lower hole is a cylindrical hole, the left-handed internal thread of the upper hole and the middle section of the swivel nut form a threaded pair, the cylindrical hole of the lower hole and the lower section cylinder of the swivel nut form a cylindrical pair, the fixing nut is fixedly connected to the nut seat, and the nut seat is fixedly connected with the corresponding support frame through the positioning pin. The adjusting support effect ofan adjusting support is utilized, the test installation requirement of a diesel engine is met, and meanwhile, the loosening of an installation screw can be effectively prevented.

Description

technical field [0001] The invention relates to a diesel engine test stand, in particular to a lifeboat diesel engine self-adaptive test stand, which belongs to the technical field of diesel engine production technology. Background technique [0002] Before the lifeboat diesel engine leaves the factory, commissioning, running-in and other test items are required. Therefore, it is necessary to install the diesel engine on the test bench. The test bench is usually on a base with a longitudinal T-shaped slot, and through T-shaped bolts, two transverse pad irons and a load device are respectively fixed. There is a bracket seat on the iron. Before the diesel engine is tested, the diesel engine and the load device are connected axially through an elastic coupling, and then the diesel engine mounting feet are fixed and connected to the bracket seat with screws. As we all know, the lifeboat diesel engine has four independent rigid mounting feet, which are rigidly connected with the...

AI Technical Summary

Problems solved by technology

As we all know, the lifeboat diesel engine has four independent rigid mounting feet, which are rigidly connected with the fuselage. In theory, in the height direction, the height of the bottom plane of each mounting foot to the centerline of the crankshaft of the diesel engine is the same, that is, The bottom planes of the four mounting feet are theoretically on the same plane. In fact, due to manufacturing errors, positioning errors, assembly errors, etc., the bottom planes of the four mounting feet are not on the same plane, but there are some errors, although it does not affect the diesel engine. The connection accuracy with the load device in the height direction, but the diesel engine mounting feet and the support frame are fixed and connected by screws, usually one of the four mounting legs will be suspended in the air, and cannot be effectively supported on the corresponding support frame at the same time

[0003] The four installation feet cannot be effectively supported on the corresponding support frame at the same time; the bottom surface of the installation foot is supported on the support frame at three points, thus causing the center of gravity of the diesel engine to be unstable, and vibration and noise will be generated during the test run of the diesel engine. It will cause the mounting feet to break. In order to ensure that the four mounting feet of the diesel engine can be effectively supported at the same time, gaskets are usually added under the suspended mounting feet. Because the suspension height of each diesel engine’s mounting feet is different, and the thickness of the gasket is limited. , therefore, this method is difficult to completely eliminate the gap between the mounting foot and the support frame, so it cannot effectively overcome the vibration and noise of the diesel engine due to the installation

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