CS225515B1 - Mould for centrifugal pouring of thrust bearing plates - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to a metal mold for vertical centrifugal pouring of thrust bearing plates, in particular to support segments for thrust bearings of crankshafts of large ship engines.

For thrust bearings of large machines, for example large ship engines, solid or split support plates, consisting of tilting segments, are used. Both plates and segments are made of steel with a lining of bearing metal. The bearing metal layer was previously poured statically, now in a more modern and economically advantageous manner, centrifugally. After surface treatment before pouring, the plate is inserted into a steel mold - jig. The plate is loosely placed in the mold and due to dilatations during casting and inaccuracies in the production of the plates, even within the permissible tolerances, leakage occurs in the mold, bearing metal penetrates under the plate and metal splashes from the mold. Sealing the board with clay or asbestos cord is laborious and unreliable and leads to a large and irregular drop in the temperature of the board tinned before casting. In the production process, metal spattering leads to material losses and deterioration in the quality of the liner and the strength of the steel connection. Spraying hot metal also jeopardizes operator safety.

The invention is based on the known state of the art and the object of the present invention overcomes the above drawbacks. SUMMARY OF THE INVENTION The base plate of the centrifuge is supported and secured by connecting pins to a bearing plate which forms a bearing and sealing surface of the outer lower edge of the bearing and a spray plate which simultaneously forms a sealing surface of the inner lower edge of the bearing its position is secured by a central pressure screw and at least one driving pin, the top sealing plate being provided with a pressure ring with clamping wedges.

225 515

The mold according to the invention achieves an improvement in the quality of the lining by its more uniform structure. Splashing of metal is avoided, saving material and increasing casting safety. The assembly time before casting and the mold removal time after pouring the bearing metal are reduced.

An exemplary embodiment of the invention is illustrated in the accompanying drawing.

A bearing plate 2 secured against flooding by metal connecting pins 9 is mounted on the centrifuge base plate 1. Thus, the seating plate 2 forms the bearing and sealing surface of the outer lower edge of the bearing 10. The sealing of the inner lower edge of the bearing 10 is secured by a sprinkler 5 which is supported on the overload spring 7 and secured by a thrust bolt 16 and against rotation by a pin 8. The surface of the bearing surface 10 with metal 11 is sealed by a top sealing plate provided with a pressure ring 4 with clamping wedges.

Claims (1)

SUBJECT OF THE INVENTION 225 515 Mold for centrifugal pouring of thrust bearing plates, characterized in that a bearing plate (2), which forms the bearing and sealing surface of the outer lower edge of the bearing (10), is supported on the centrifuge base plate (1) and secured by connecting xolles (9); the sprinkler (5), which also forms the sealing surface of the inner lower edge of the bearing (10), is supported on the overload spring (7) and its position is secured by a central pressure screw (6) and at least one driving pin (8); the plate (3) is provided with a thrust ring (4) with clamping wedges.