GB305285A - Improvements in or relating to labyrinth gland packing - Google Patents

Abstract

305,285. Baumann, K., and Metropolitan-Vickers Electrical Co., Ltd. Nov. 7, 1927. Stuffing-boxes, substitutes for.-In labyrinth packing of the type in which expansion of a strip due to rubbing contact tends to increase the clearance, each of a. pair of coacting strips is conical. Two conical strips 1, 2, Fig. 1 may be in end to end association. The strip 2 may be of the form shown or may be a simple cone, bent at the end to form a radial clearance with the strip 1. A number of conical flanges carried on a single root member may be in end to end association with similar flanges carried by another root member, Fig. 8. The ends of the flanges may be shaped to form a number of constricted passages d, e, f. Alternatively, the strips may coact by their edges g, h, Fig. 10, and the two sets of strips may be inclined at different angles. The plane in which the ends of the strips lie may be radial, or inclined, as shown, or the ends of the strips may be staggered. Packing for a turbine diaphragm comprises a segmental ring 20, Fig. 11, on the rotor carrying conical packing strips 19, which coact with similar strips 22 on the diaphragm 23. The latter is carried by the nozzle portions 25, which are secured in a groove 27 in the casing by caulking 26, and by a flange and groove engagement 28, 29. Specifications 217,457, [Class 110 (iii), Turbines &c.], and 225,936 are referred to.