RU2437009C1 - Pneumatic magnet suspension - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: pneumatic magnet suspension consists of rubber cord casing (2) with cover (3) forming main working cavity (4) located in cylinder case (1), of additional reservoir (5) of partition (6) between them with electro-magnetic valve (7) controlled with control system (8). Opposite and in pairs permanent magnets (11, 12) with magnetic poles of one polarity facing each other are arranged inside main working cavity (4) on cover (3) and on partition (6). Stops (9, 10) colliding at a pressure stroke are set on cylinder case (1) and on external surface of additional reservoir (5). When stops (9) of cylinder case (1) contact stops (10) of additional reservoir (5) at the compression stroke, an air gap between magnetic poles of opposite located permanent magnets (11, 12) is within ranges of 0-10 mm.

EFFECT: reduced probability of breakdown due to sharp increase of rigidity characteristics of pneumatic magnet suspension.

3 cl, 2 dwg

Description

The invention relates to the field of engineering, in particular to vibration protection devices.

A device for a magnetic shock absorber is described in RF patent No. 2298118, IPC F16F 6/00, comprising a cylindrical body closed on both sides by covers, a rod passed into the hole of one cover, with a piston made in the form of a round magnetic washer having calibrated through channels a fixed circular magnetic washer mounted on the second cover; a set of circular magnetic washers with through calibrated channels placed between the fixed circular magnetic washer and the piston at a certain distance from each other, th pair of circular magnetic disk, mobile and fixed, facing each other with their like poles.

The main disadvantages of the device include the fact that the magnetic shock absorber has a low energy intensity, is able to damp only vibrations with a small amplitude due to the close interaction of the magnetic forces of permanent magnets, therefore, it is difficult to use it to amortize large objects with large masses and amplitude of oscillations.

Also known is a pneumatic suspension device described in RF patent No. 2225285, IPC F16F 9/04 (prototype), containing a rubber-cord casing with a lid, forming the main working cavity, additional capacity, a partition located between them with an electromagnetic valve controlled by a control system. The main working cavity and additional capacity are installed between the sprung and unsprung masses of the depreciable object.

The main disadvantages of the device include the fact that when amortizing large-sized objects with large masses and fluctuations in case of possible breakdowns of the air suspension, dynamic effects (impacts) on the depreciable object are accompanied by increased overloads, which negatively affects the state of the depreciable object, its mechanisms, as well as cargo safety and the condition of the crew if the vehicle to be depreciated.

The objective of the invention is to prevent breakdowns and reduce their harmful effects due to a sharp increase in the stiffness of the air suspension by creating additional magnetic forces acting near the breakdown zones of the air suspension.

The problem is achieved in that in the known pneumatic suspension containing a rubber-cord shell with a cover, forming the main working cavity located in the cylindrical body, an additional capacity, located between them a partition with an electromagnetic valve controlled by the control system, according to the invention inside the main working cavity on the cover and on the partition are placed opposite oppositely permanent magnets, facing the magnetic poles of the same polarity to each other, on a cylindrical body The main working cavity and on the outer surface of the additional capacity are equipped with stops with the possibility of collision during compression, the permanent magnets being installed so that when the stops of the cylindrical body and the stops of the additional capacity touch during compression, the air gap between the magnetic poles of the oppositely arranged permanent magnets has a value in the range of 0-10 mm.

At least one pair of permanent magnets is placed inside the main working cavity.

The valve control system comprises an object displacement converter, an object speed signal generator, a power switch control unit, a power switch for connecting the coil of the electromagnetic valve to a power source, connected in series.

The invention is illustrated by drawings, where:

- figure 1 presents the proposed air suspension;

- figure 2 shows the structural diagram of the control system of the electromagnetic valve.

The pneumatic magnetic suspension comprises a cylindrical body 1, a rubber-cord casing 2 with a cover 3, forming the main working cavity 4, an additional container 5, a partition 6 with a valve device 7 located between them and a valve control system 8. On the cylindrical body 1 there are stops 9, on the outer on the surface of the additional tank 5, stops 10 are placed. Inside the main working cavity 4 on the lid 3 and on the partition 6 there are opposed in pairs permanent magnets 11 and permanent magnets 12 facing the magnetic pole E of one polarity to each other. With the possible contact of the stops 9 and 10 during compression, the air gap between the permanent magnets 11 and 12 has a value in the range of 0-10 mm.

The valve control system comprises an object displacement transducer 13 connected in series, an object speed signal driver 14, a power switch control unit 15, a power switch 16 for connecting a solenoid valve winding 7 to a power source.

Air magnetic suspension works as follows.

During the compression of the pneumatic magnetic suspension, the electrovalve 7 is turned off, the pressure in the main working cavity 4 increases, the pressure in the additional tank 5 is constant, the tanks 4 and 5 are disconnected. With large fluctuations in the shock absorption of the object during the collision of the stops 9 and 10 (breakdown of the suspension) during compression, the air gap between the permanent magnets 11 and 12 becomes the minimum possible and has a value in the range of 0-10 mm. In this case, the repulsive forces between the same poles of the permanent magnets 11 and 12 are of the greatest importance and counteract the movement of the moving part of the suspension, which is equivalent to a sharp increase in the stiffness of the suspension at the end of the compression stroke.

At the beginning of the rebound stroke, the energy of the compressed gas and the magnetic field energy of the permanent magnet system are given to the shock-absorbing object, to reduce the stiffness of the suspension, the control system 8 turns on the electro-valve 7 for a short time, the gas pressure in the tanks 4 and 5 is equalized, which leads to additional damping of the oscillations of the shock-absorbed object.

Thus, the proposed pneumatic magnetic suspension allows during operation to reduce the likelihood of breakdowns (shock) due to a sharp increase in the stiffness of the pneumatic magnetic suspension at the end of the compression stroke by creating additional magnetic forces acting near the breakdown zone of the pneumatic magnetic suspension.

Using the proposed pneumatic magnetic suspension allows the depreciation of large-sized objects with large masses and swings to reduce overloads, increase the efficiency and reliability of the shock-absorbed devices, in particular in vehicles, increase smoothness, improve crew conditions and ensure the required safety of special cargoes during transportation.

Claims (3)

1. Pneumatic magnetic suspension, containing a rubber-cord shell with a cover, forming the main working cavity located in the cylindrical body, an additional capacity, a partition located between them with an electromagnetic valve controlled by a control system, characterized in that inside the main working cavity on the cover and on the partition oppositely coupled permanent magnets are placed, facing the magnetic poles of the same polarity to each other, on the cylindrical body of the main working cavity and on the outer surface has the additional tank stops the chance of collision on the compression stroke, wherein the permanent magnets are set so that when the stops contact the cylindrical body and thrusts the additional tank to the compression stroke air gap between the magnetic poles of permanent magnets oppositely disposed has a value in the range 0-10 mm. 2. The pneumatic magnetic suspension according to claim 1, characterized in that at least one pair of permanent magnets is placed inside the main working cavity. 3. The pneumatic magnetic suspension according to claim 1, characterized in that the valve control system comprises an object displacement transducer, an object speed signal conditioner, a power switch control unit, a power switch for connecting an electromagnetic valve coil to a power source.

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