Device for measuring friction coefficient of water-lubricated bearing with low speed and heavy load

Abstract

The invention provides a device for measuring the friction coefficient of a water-lubricated bearing with low speed and heavy load. The device mainly comprises an executing mechanism, a water circulating device, a sealing device, a motor, a transmission device, a shaft, bearing and a friction-force measuring device, wherein the executing mechanism is used for meeting vertical and uniform loading of load of the specific-pressure bearing; the water circulating device and the sealing device are used for guaranteeing full cooling and lubrication of the bearing; the motor and the transmission device drive a shaft system to rotate; and the friction-force measuring device is designed on the basis of the force-balance principle. The device provided by the invention has the advantages that the systems are connected by utilizing a base, a pipeline and a rod-beam structure to form the process of lubricating, rotating, loading and measuring the whole water-lubricated bearing, so that the measurement of the friction coefficient is realized; a hydraulic cylinder is adopted for combining with an ejecting rod, a linear bearing and a rolling bearing and is used as a loading device, so that the vertical loading force only applied on the measured bearing is guaranteed and the large-load loading is realized; simultaneously, the interference of the friction force of other supporting bearings on a measured result is effectively avoided, and the accurate measurement of the friction coefficient is realized.

Description

technical field [0001] The invention relates to a bearing friction coefficient measuring device, in particular to a bearing friction coefficient measuring device suitable for measuring the friction coefficient of a marine low-speed heavy-load water lubricated bearing. Background technique [0002] The continuous improvement of ship tonnage puts forward higher requirements for its main engine and propulsion system. In order to ensure the strength, the quality of the propeller shaft system is constantly increasing, and the friction phenomenon caused by the continuous increase of the load on the stern bearing of the ship affects the normal operation of the shaft system and the service life of the bearing, and makes the design and selection of the bearing face new problems. Bearing friction coefficient is an important index for bearing selection and an important prerequisite in the bearing design process. It is necessary to obtain its value accurately in the test stage for subse...

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Problems solved by technology

The test device described in this paper can measure and study the bearing friction coefficient. Since the loading device directly acts on the bearing to be tested, it can measure the bearing friction coefficient with a large specific pressure, and obtain the bearing friction coefficient with the specific pressure, speed, etc. However, the device still uses the measurement results of the torque sensor as the experimental results for the calculation of the friction coefficient, which includes the friction torque of each intermediate bearing and support bearing, so the measurement results still cannot accurately reflect the friction coefficient of the bearing to be tested value

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