RU1778380C - Damping device - Google Patents

Abstract

Usage: in vibration protection technology. SUMMARY OF THE INVENTION: A damping device comprises a housing with a working cavity partially filled with liquid with suspended ferromagnetic particles, and installed hydraulic resistance in the form of a mesh zigzag spring made of non-magnetic material, a magnet located outside the housing and interacting with ferromagnetic particles. The design of the mesh in the form of a spring increases damping efficiency. 2 ill.

Description

FIG.

The invention relates to mechanical engineering, instrumentation, and in particular to depreciation devices of various machines, devices, mechanisms.

A damping device is known that comprises a housing with a working cavity filled with a liquid with ferromagnetic particles suspended in it, installed by hydraulic resistance in the form of a grid of non-magnetic material, a magnet located outside the housing.

The disadvantage of this device is its low damping efficiency.

An object of the invention is to increase damping efficiency.

The goal is achieved in that the damping device comprises a housing with a working cavity partially filled with liquid with suspended ferromagnetic particles, and a set hydraulic resistance in the form of a grid of non-magnetic material, a magnet located outside the housing and interacting with ferromagnetic particles, while the hydraulic resistance is made in the form of a zigzag spring.

Figure 1 shows the proposed device; figure 2 is a section aa in figure 1.

The damping device comprises a housing 1 with a working cavity 2 partially filled with liquid. A magnetizing body 3 is placed in the inner cavity, which is a suspension of ferromagnetic particles in a liquid (toluene or kerosene), the viscosity of which changes under the influence of a magnetic field. In the working cavity, a hydraulic resistance 4 is installed, made in the form of a mesh zigzag spring of non-magnetic material. Outside the housing 1, a magnet 5 is created, which creates a magnetic field, and a suspension unit 6.

Ј.

The damping device operates as follows.

The magnet 5, which creates a magnetic field, through air gaps and walls of the working cavity 2 made of non-magnetic material is in constant interaction with the magnetic fluid and holds it in working position between the poles of the magnet 5. During vibrations of the housing 1, damping is carried out due to the hydraulic resistance of the friction of the magnetic fluid against the walls of the working cavity and through the mesh cells of the hydraulic resistance 4. In this case, due to inertia, the zigzag mesh spring 4 is compressed. For example, when the housing 1 deviates from the vertical position to the right, the liquid and the mesh spring move to the left under the action of inertia forces. Due to the difference in the masses of the spring and the liquid, depending on the stiffness of the spring, the speed of movement of the spring and the liquid will be different. The compression of the spring increases the pressure in the cavities between the zigzags of the spring where the fluid is directed. With increasing back pressure, the hydraulic resistance increases. At the same time, the damping efficiency increases.

Claims (1)

The claims A damping device comprising a housing with a working cavity partially filled with liquid with suspended ferromagnetic particles and installed hydraulic resistance in the form of a grid of non-magnetic material, a magnet located outside the housing and interacting with ferromagnetic particles, characterized in that, in order to increase efficiency, hydraulic resistance is made in the form of a zigzag spring.