SU1291759A1 - Brake disk with electrohydraulic cooling - Google Patents

Abstract

The invention relates to the field of mechanical engineering and can be applied for braking rotating shafts of machines and mechanisms. The aim of the invention is to increase braking efficiency by improving heat transfer. For this, the internal cavity of the friction support disk (CRF) 4 (L with to 19 No. JS is 20

Description

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divided by a mobile conductive flat membrane (PM) 11 into two chambers 12 and 13, filled with heat-transfer fluid 14. The end walls 9 and 10 of the CRF are connected to opposite poles of a source of constant voltage. The PM is connected to the same source through a switch that periodically changes its polarity. Thorp wall 9 and 10 are insulated

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The invention relates to a power engineering machine and can be used in various sectors of the national economy of the country for braking heavily loaded rotating shafts of machines and mechanisms.

The aim of the invention is to increase braking efficiency by improving the tag exchange of friction surfaces of brake friction discs by moving the heated coolant from the chamber located near the friction surface to the finned chamber to be cooled by oscillating a flat conductive membrane in a constant high voltage field with periodically variable polarity.

The drawing shows a disk brake with electro-hydraulic cooling, a cross-section.

A brake movable friction disk 1 is mounted on the shaft 2 by means of a key 3 with the possibility of rotation around an axis. A supporting friction disk 4 with radiator fins 5 and its switching-on element 6 is mounted on a shaft 7 and can be moved along an axis, for example, along a guide pin 8 and its end walls 9 and 10 are electrically connected to the opposite poles of a low-power high-voltage source of constant voltage ( not shown). In this case, the wall 9 with radiator fins 5 is designed for cooling, and the outer surface of the wall 10 is the friction surface of the disc 4. The inner cavity of the supporting disc 4 is divided by

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from PM dielectric rings 19 and 20. In dielectric rings 19 and 20, channels 15 and 16 are made. In channels 15 and 16, check valves 17 and 18 are installed in series. Periodically, the polarity of the PM changes, PM oscillates. Fluctuations of PM provide the flow of liquid coolant 14 from chamber 12 to chamber 13 for cooling. 1 il.

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ABOUT

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A separator (membrane) 11 with two chambers 12 and 13 of variable volume, which are completely filled with dielectric coolant 14 and are connected to each other by channels 15 and 16, equipped with check valves 17 and 18, with the formation of a sequential closed hydrochain. The separator 11 is made in the form of a movable conductive membrane, connected to a high-voltage source of direct voltage through a switch (not shown), which periodically changes the polarity of the separator, and is electrically isolated from the end surfaces 9 and 10 by dielectric rings 19 and 20.

The brake disc works as follows.

To brake the rotating friction disk 1 rotating around its axis, the friction disk 4 is moved along it along the axis. The movement is carried out until the disks 1 and 4 are completely in contact with each other. A non-rotating friction bearing disk 4 can move reciprocally along the axis of rotation under the force applied to its element 6. To make this movement between the non-rotating friction support disk 4 and the shaft 7, onto which it is mounted, a movable connection is made, for example, with a guide key 8.

When pressing the supporting friction disk 4 on the face surface of the friction rotating friction

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disk 1 during the braking process, heat is generated as a result of friction between disks 1 and 4 with each other. Under the influence of the generated heat, the dielectric coolant 14 located in the chamber 13 adjacent to the end wall 10 is heated, and in the chamber 12 adjacent to the cooling end wall 9 with radiator fins 5 has a lower temperature equal to the surrounding brake medium due to heat exchange with her. To provide heated heat carrier 14 from chamber 13 to chamber 12, and cold heat carrier vice versa, chamber 12 moves to end walls 9 and 10 when applied for braking from a high-voltage source. At the same time, a movable conductor, a flat flat membrane separator 11 from the same source, is supplied with voltage through a switch, periodically changing the polarity of the separator 11. As a result, alternating homogeneous electric fields occur between the movable separator 11 and fixed end walls 9 and 10, which cause the appearance of an alternating electrostatic ponderomotive force acting on the movable separator 11, causing it to oscillate about the equilibrium position. This leads to a change in the volume of chambers 12 and 13 in antiphase: with an increase in volume, for example, chamber 12, chamber 13 decreases its volume, and vice versa. The change in volume of chambers 12 and 13 causes, in turn, a change in pressure in them. Under the action of the pressure differential in the chambers, the check valves 17 and 18 alternately open and close to ensure unidirectional flow of the dielectric coolant.

Editor O. Yurkovetska Order 218/37

Compiled by I.Lukina

Tehred L.Syordyukov Proofreader

Circulation 812. Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

917594

From one chamber to another through channels 15 and 16. Together with the coolant, heat is actively transported from the end wall 10 of the friction to the end 5 cooling wall 9. At the same time, radiator fins 5 intensify heat removal from wall 9 and heat carrier 14 to the environment.

fO As a heat transfer fluid in the proposed brake, you can use both liquid and gaseous dielectrics.

15 F o rmula of the invention

Brake disc with electro-hydraulic cooling, large with a cavity limited by the frontal

20 walls, and containing a current-conducting separator installed in the cavity, electrically isolated from the end walls with the formation of two chambers, one of which is filled with liquid

25 by a heat carrier, a high-voltage source of direct voltage, the negative pole of which is connected to one of the end walls of the supporting disk, and radiator fins, is 30 in order to increase service life and reliability by improving heat exchange and using single-phase heat carrier it is provided with a reverse

 35 by a valve and a switch for periodically changing the polarity of the source, the positive pole of the constant high voltage source is connected to another end wall,

40, the separator is connected to the source through a switch and is made in the form of a flat membrane, the second chamber is filled with coolant and communicates with the first chamber through return valves to form a sequential closed hydraulic circuit.

Compiled by I.Lukina

Tehred L.Syordyukov Proofreader N.Korol

Claims (1)

Claim Electro-hydraulic cooled brake disc made with a cavity bounded by end walls and containing a current-conducting separator installed in the cavity, electrically isolated from the end walls with the formation of two chambers, one of which is filled with liquid 25 coolant, a high-voltage source of constant voltage, the negative pole of which is connected to one of the end walls of the support disk, and radiator fins, about 30 kicking in that, in order to increase the service life and reliability by improving heat transfer and using a single-phase coolant, it is equipped with check valve and switch for periodically changing the polarity of the source, the positive pole of the constant high voltage source is connected to another end wall, 40 spacer inen to the source through the commutator and is made in the form of a flat membrane, the second chamber is filled with coolant and communicated with the first chamber through check valves to form a sequential closed hydraulic circuit. Compiled by I. Lukin Editor O. Yurkovetskaya Tehred L. Serdyukova Proofreader N.Korol Order 218/37 Circulation 812. Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and printing company, Uzhgorod, Project 4,