DE3444344A1 - Method for controlling the load take-up on sliding-shoe bearings - Google Patents

Abstract

In known sliding-shoe bearings, in particular in known hydrodynamic sliding-shoe bearings which have at least one main sliding shoe and a relief sliding shoe, the setting and maintenance of a particular bearing gap presents difficulties and these can have a disadvantageous effect, in particular, on the emergency running properties of the sliding-shoe bearing. According to the invention, however, the setting and maintenance of a load-dependent bearing gap in hydrodynamic sliding-shoe bearings and hence an improvement in the emergency running properties is achieved by virtue of the fact that the outflow of oil and/or the outflow pressure of the oil is measured and that the load take-up of the relief sliding shoe is controlled as a function of the measured values determined during this measurement.

Description

H 84/67

Annex to the patent application by

Klöckner-Humboldt-Deutz

Corporation

dated November 26, 1984

Procedure for regulating the load absorption on sliding shoe bearings

The invention relates to a method for regulating the load absorption on sliding shoe bearings, in particular on hydrodynamic sliding shoe bearings, which have at least one main sliding shoe and one relief shoe.

From DE-OS 26 04 889 hydrostatic bearings with several Bearing points known, at least the storage areas for controlling and monitoring the individual bearing points the bearing shoes are connected to a common source for hydraulic carrier medium via feed lines, which are equipped with valve control units and pumps, which depend on the flow of the hydraulic medium regulate the pressure prevailing on the respective bearing surface of the bearing shoe.

For the storage of rotary tubes and the like, hydrodynamically or hydrostatically operating slide shoes are used as slide shoe bearings known. If more than two sliding shoes are used per bearing in a sliding shoe storage, the load distribution on the sliding blocks is to be set as evenly as possible. It must be taken into account here that the Storage as a whole is subject to different operating conditions that cause changes in the bearing gap.

3U4344

H 84/67

The object of the invention is to achieve an optimal setting and maintenance of a load-dependent bearing gap To achieve sliding shoe bearings, especially with hydrodynamic sliding shoe bearings, and thereby the emergency running properties to improve.

This object is achieved according to the invention in that the oil outflow and / or the oil flow pressure is measured and
the load absorption of the relief slide shoe is regulated as a function of the measured values determined in this way.

As is well known, the bearing gap height is or is an oil film thickness of bearings, among other things, depending on the load-bearing capacity of the sliding blocks. This causes a higher load or load absorption a smaller bearing gap with the same oil viscosity and bearing temperature. if you now have a certain additional amount of oil in the bearing gap of the supporting area of a hydrodynamically acting slide shoe brings in according to the pressure, the load-dependent bearing gap results in a proportional oil flow resistance, which represents a clear relation to the load absorption of the sliding shoe. An oil flow resistance that is established in this way or oil pressure is a clear control variable for the contact pressure or positioning of a a relief sliding shoe associated with a main sliding shoe. The control of the relief sliding shoe can here both by processing measured oil discharge values as well as the oil discharge pressure itself, with the necessary Forces are generated by the dimensioning of the lifting pocket diameter on the relief sliding shoe. The ADströmöl can be used both directly and indirectly by interposing a membrane or by separating the oil systems in some other way Avoid contamination or act on the lifting bag for control reasons. For setting more optimal Is bearing clearance conditions for an operating range

H 84/67

the proportionality of the bearing load to the outflow oil pressure, the manipulated variable can be influenced by additional controls known per se.

In an advantageous further development of the invention, the load absorption of the relief slide shoe is regulated by Supply and discharge of a predetermined additional amount of oil into the bearing gap of the slide shoe. The one that sets in here Oil discharge resistance or oil pressure of this The additional amount of oil supplied is a clear control variable for the contact pressure or positioning a relief sliding shoe relieving a main sliding shoe.

With the aid of the method according to the invention, the load-dependent Bearing gap of the relief sliding shoe optimally adjusted and thereby the emergency running properties of a hydrodynamic Slide shoe bearings, e.g. for rotary tubes, can be significantly improved. The inventive method can also can be used very advantageously in a cascade connection with more than two relief sliding shoes.

Claims (2)

34443U November 26, 1984 KHD Str / Ju H 84/67 claims 1. A method for regulating the load absorption on sliding shoe bearings, in particular on hydrodynamic sliding shoe bearings, which have at least one main sliding shoe and one relief sliding shoe, characterized aaaurch in that the oil outflow and / or the oil outflow pressure is measured and the load absorption of the relief sliding shoe is regulated as a function of the measured values determined in this way. 2. The method according to claim 1, characterized in that the regulation of the load absorption of the relief shoe takes place by supplying and removing a predetermined additional amount of oil into the bearing gap of the slide shoe.