Locomotive Valves and Valve Gears, with a Special Treatise on Valve Setting; An Explanation of the Construction and Action of the Plain Slide Valve, t

 
9781155103952: Locomotive Valves and Valve Gears, with a Special Treatise on Valve Setting; An Explanation of the Construction and Action of the Plain Slide Valve, t

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...reversing valve in place in the valve bushing 1, with the operating lever 2, attached to the reversing valve by means of a taper pin and key. The section AA, taken through the ports, shows the reversing valve in the central position in the bushing. The reversing valve is rotated in the bushing by means of the operating lever 2, and turns through equal angles each side of its central position, so that ports b in the valve register with the admission port a in the bushing, and the other ends C of the valve port register with port d in the bushing. This establishes communication with either end of the reversing cylinder, depending on which way the reversing valve is turned. When the valve is rotated to admit steam at one end of the reversing cylinder, the other end of the reversing cylinder is opened to the exhaust by means of the exhaust cavity shown. Diagram V shows the brake release valve. This valve is arranged with an automatic float or check valve D (with a scat at each end) which from A through C to the brake cylinder. Likewise, when steam enters at B it forces the valve over and seats it at end A, in which position the valve D closes the end A and opens a passage from B through C to the brake cylinder. Diagram VI illustrates the brake cylinder, brake piston and brake spring arrangement. The brake spring C acts on piston D and applies the brake to the main crosshead of the reversing gear (see diagram I). Steam to release the brake enters brake cylinder E at A, acts on piston D against the force of the brake spring and moves the brake piston in the direction opposite to that produced by the action of the spring, thus releasing the brake (see diagram I). The tension of the brake spring is adjusted by means of the nut as shown. By...

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