SU992380A2

SU992380A2 - Pulley

Info

Publication number: SU992380A2
Application number: SU802952980A
Authority: SU
Inventors: Валерий Анатольевич Иванов; Василий Николаевич Петрина
Original assignee: Ивано-Франковский Институт Нефти И Газа
Priority date: 1980-04-30
Filing date: 1980-04-30
Publication date: 1983-01-30

Description

(54) ШКИВ(54) SHKIV

1one

Изобретение относитс к грузоподъемным устройствам, а именно к футерованным шкивам с подвижной футеровкой подъемных установок.The invention relates to lifting devices, namely, lined pulleys with movable lining of lifting installations.

По основному авт. св. № 583965 известен шкив, содержащий ступицу с ободом, в котором расположены футеровочные элементы , выполненные в виде автономных тел качени , смонтированных в ободе на подшипниках скольжени и образуюш.их замкнутую систему 1.According to the main author. St. No. 583965 is known for a pulley comprising a hub with a rim in which lining elements are arranged, made in the form of autonomous rolling bodies mounted in a rim on slide bearings and forming their closed system 1.

К недостаткам известного шкива относ тс сравнительно низка долговечность и надежность элементов подвижной футеровки .The disadvantages of the known pulley are relatively low durability and reliability of the elements of the movable lining.

Цель изобретени - повышение долговечности и надежности элементов подвижной футеровки.The purpose of the invention is to increase the durability and reliability of the elements of the movable lining.

Поставленна цель достигаетс тем, что между, двум соседними футеровочными элементами, установленными в ободе на подшипниках скольжени размешены футеровочные элементы, установленные в ободе на подшипниках качени .This goal is achieved by the fact that between the two adjacent lining elements mounted in the rim on the sliding bearings are placed the lining elements mounted in the rim on the rolling bearings.

На фиг. 1 изображен шкив, вид сбоку; на фиг. 2 - разрез А-А на фиг. 1.FIG. 1 shows a pulley, side view; in fig. 2 shows section A-A in FIG. one.

Шкив содержит ступицу 1 с ободом 2. На ободе 2 смонтированы в подшипниках 3 качени и подшипниках 4.скольжени футеровочные элементы 5 подвижной футеровки. На футеровочные элементы 5 опираетс The pulley comprises a hub 1 with a rim 2. On the rim 2, rolling bearings 3 and 4. sliding bearings are mounted on the rim 2 of the movable lining. On the lining elements 5 rests

5 канат 6.5 rope 6.

Работает шкив следующим образом.Pulley works as follows.

В первоначальный момент при приработке шкива канат 6 будет опиратьс только на подшипники 4 скольжени . При этом удельна нагрузка на каждый подшипникAt the initial moment during the run-in of the pulley, the rope 6 will be supported only on the slide bearings 4. In this case, the specific load on each bearing

О скольжени будет вдвое выше того уровн , когда канат 6 опираетс не только на подшипники скольжени , но и одновременно на подшипники 3 качени . Следствием увеличенной удельной нагрузки будетThe slip will be twice as high as the rope 6 rests not only on the slide bearings, but also simultaneously on the three rolling bearings. The consequence of the increased specific load will be

j увеличенна сила трени в подшипниках 4 скольжени , а значит в этом случае будет иметь место увеличение суммарного статического момента от сил трени в подшипниках скольжени . Другими словами, величина суммарного статического моментаj is an increased friction force in sliding bearings 4, which means in this case there will be an increase in the total static moment from the friction forces in sliding bearings. In other words, the value of the total static moment

Claims

20 from the frictional forces in the bearings of the movable lining elements 5 will be almost the same as in the case when the rope rests on all rolling and sliding bearings, despite the fact that until the end of the moment of running-in of the sliding bearings, the rolling bearings do not take the load. Practically unchanged total static moment from friction forces in bearings of movable lining elements, regardless of whether the running-in of sliding bearings is finished or not finished, ensures a constant pulley performance, since movable lining elements will turn, together with a pulley rim, i.e. to engage in a portable movement. Further, in operation, the rolling bearings wear less than the sliding bearings. Since each lining element, bearing on the slide bearings, is interposed between two lining elements placed on rolling bearings, the sliding bearings cannot be worn to an extent greater than rolling bearings. This is due to the fact that when the sliding bearings are worn, the lining element, together with the rope supported on it, will begin to fall, but only until the rope is supported on the lining elements mounted on rolling bearings. This, in turn, will lead to a decrease in the load on the considered sliding bearing, and hence to a decrease in its wear. Thus, the wear of the sliding bearing is slowed down until the rolling bearings are worn out by a certain amount. After this, the process of mutual adjustment of the wear of the sliding and rolling bearings is repeated. The mutual adjustments of the wear of the slide and roll bearings are repeated. Mutual adjustment of wear is possible only when rolling and sliding bearings are installed in alternate order. This method of installation allows to increase the durability of sliding bearings, since rolling bearings will prevent their rapid wear. At the same time, the presence of sliding bearings ensures unconditional participation of the movable lining elements in a portable movement with a rim during rotation of the pulley, which provides increased reliability and durability of the movable lining as a whole. The proposed device can be widely used in the lifting mechanisms of the oil, coal, mining industries and other branches of the national economy. The invention of the Pulley on the author, St. No. 583965, characterized in that, in order to increase the durability and reliability of the movable lining elements, between the adjacent lining elements mounted in the Rim on slide bearings are lining elements mounted in the rim on rolling bearings. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 583965, cl. B 66 B 15/04, 1976.