Camshaft testing equipment

Abstract

The invention discloses camshaft testing equipment. The camshaft testing equipment comprises a base, loading devices arranged on the base, a supporting device for supporting a camshaft and a driving device for driving the camshaft to rotate; each loading device comprises a support, loading swing arm assemblies matched with cams arranged on the camshaft and preloading assemblies mutually cooperating with the loading swing arm assemblies; each loading swing arm assembly comprises a swing arm and a reading board perpendicularly arranged in the middle of the swing arm, rollers are arranged at thetwo ends of each swing arm, standing boards are arranged on the supports, and the middles of the swing arms are rotatably connected to the standing boards; and each preloading assembly comprises a shell, a gland located over the shell, an elastic part, an upper spring base and a lower spring base, wherein the elastic part and the upper spring base are located in the space formed between the shelland the gland,the upper end of the elastic part acts on the upper spring base, and the lower end of the elastic part acts on the lower spring base.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a camshaft testing device. Background technique [0002] The camshaft is the core part of the diesel generator for nuclear power emergency. Through the rotation of the cams with different phase angles, the opening and closing of the crankshaft valve is controlled to provide the fresh air necessary for combustion of the diesel generator. The camshaft is inside the diesel generator High-speed rotation, the maximum rotation speed is 750rpm. At this speed, because the cam is impacted by the cyclic force from the valve spring and the combustion cylinder, the cam surface of the camshaft is prone to contact fatigue wear, and high temperature is likely to occur between the journal of the camshaft and the bearing bush, reducing the camshaft The operating life of the diesel generator will affect the overall stability and reliability of the diesel generator. [0003] At pres...

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Problems solved by technology

[0004] In the prior art, such as Chinese patent application number: 201620850696.1, patent name: an invention patent for a diesel engine camshaft and tappet wear test device, the technical solution has the following disadvantages: 1. The mechanical structure is a closed structure , unable to adapt to the replacement of various camshaft test pieces, it is necessary to develop a separate test tool for each different length of the test camshaft; 2. The test preload on the cam can only be changed by changing the spring, and what is the size of the preload? Unable to accurately measure 3. Unable to test the magnitude of the dynamic loading force during the rotation of the cam under the condition of applying the rated preload

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