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Title: |
1888 Article-Robey & Co. Ltd., High-Speed Horizontal Steam Engine |
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Source: |
The Electrical Journal, V 21, 24 Aug 1888, pg. 465 |
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Insert Date: |
1/14/2017 7:44:58 PM |
High-Speed Compound Engine by Robey and Co.
Messrs. Robey and Co., the well-known engine makers, exhibit a small high-speed compound engine which has been specially designed for driving dynamos either direct or from the fly-wheel. This engine, which is represented in the accompanying illustration, runs at 500 revolutions per minute. The moving parts are all made of steel, the piston and rod being in one piece, and the number of pieces has been kept as few as possible. The crank is steel, and runs in very long bearings of gunmetal.
It will be noticed from the drawing that the whole of the working parts are enclosed within the base-plate, or hinged cones surrounding the crank, completely protecting it not only from dust and grit, but also preventing the splash of any oil. The working parts are lubricated from the inside, a licker fixed under the large end of the connecting rod taking up a portion of the oil at each revolution, and not only lubricating the crank pin but throwing it upon the connecting rod, slipper, and piston-rod. There is thus continuous circulation of oil from the well underneath the crank through the piston-rod slide, and back again through a channel provided for it to the well.
In consequence of this arrangement the consumption of oil is practically nil, and the lubrication seems to be very perfect. The engine illustrated is designed for a working pressure of 150 lb., and has a high-pressure cylinder 5¼ in. diameter, low-pressure cylinder 9 in. diameter, and is said to work economically up to 25 horse-power.
The valve of the high-pressure cylinder is of the piston type, and runs practically without friction. There is little or no vibration perceptible, and compared with the ordinary single-acting engines for high-speed there can be no question that this engine works with a very economical use of steam. |
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1888 Robey & Co. Ltd., High-Speed Horizontal Steam Engine
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