Anti-vibration system for machine-tools

FIELD: machine building.

SUBSTANCE: anti-vibration system consists of at least four bumpers of different stiffness. A platform rests on two vertically arranged bumpers and of a bumping element. One bumper is installed over a free end of the platform and with another end it is attached to a lever. At least two bumpers are fastened to the lever on opposite sides relative to the free end of the platform. The bumping element formed with two axial cylinder sleeves is mounted on the opposite end of the platform. A pressure tight circular cavity is formed between external and internal sleeves. An upper part of the cavity is closed with a movable circular flange, while the lower one is closed with a circular washer. A circular piston with throttling holes is arranged in the circular cavity. The piston is hinged by means of at least three rods with the circular flange whereupon a spring rests. An upper base of the spring thrusts against a cover rigidly connected with a rod of the damper. A bushing is rigidly tied with the cover and operates as a guide for the spring. The rod is installed coaxially to sleeves. A lower end of the rod is connected with a vibration protected object, while an upper one is connected with the cover.

EFFECT: increased efficiency of anti-vibration in resonance mode.

3 dwg

 

The invention relates to mechanical engineering and can be used for isolation of process equipment with a displaced center of mass, such as turning machines, weaving machines, platforms ventilation units and other

The closest technical solution to the declared object is picked-up system according to the patent of Russian Federation №2282080, F16F 7/00, 1989 (prototype), containing at least four vibration damper with pendulum suspension with different stiffness and related support items of equipment.

A disadvantage of the known device is the lack of efficiency at resonance due to the lack of damping.

Technical result - increase the effectiveness of vibration isolation in a resonant mode and a simplified design and installation.

This is achieved in that in the vibration-insulating system for machines with at least four of insulator having a different stiffness and related support items of equipment, the system further comprises a platform on which is mounted vibrotherapy machine and which is supported by two vertically spaced insulator and a damping element located under the platform, and one vibration absorber is located above the free end of the platform and secured to the other face on the lever with G-mod is a great cross-section in a vertical plane and U-shaped in cross section a horizontal plane, and on the arm with a U-shaped cross-section in the horizontal plane is fixed at least two insulator on opposite sides relative to the free end of the platform and at the opposite end of the platform has a damping element, which is formed by two coaxial cylindrical sleeves - external and internal with the formation of the sealed annular cavity, the top of which is closed by a movable annular flange is sealed to the inner and outer surfaces, and the bottom is sealed annular washer, the annular cavity is placed a circular piston with a throttling holes for the passage of damping medium from the lower part of the annular cavity at the top and Vice versa, and the articulated piston connected by means of at least three rods with annular flange on which rests a spring, while the upper base of the spring abuts against the cover rigidly connected with the rod of the damper, and the sleeve is rigidly connected with the cover, serves as a guiding device for the spring, and the rod is coaxially mounted to the cartridge - external and internal, and its lower end connected with vibroisolating object, and top with lid.

Figure 1 shows the General layout of the proposed vibration-insulating system, figure 2 is a top view of figure 1, figure 3 - damping element./p>

Vibration-damping system for machine comprises a base 1 and at least four of the insulator 5, 7, 9, 10, having different hardness and related support items of equipment. The system further comprises a platform 3 on which is mounted vibrotherapy machine 2 and which is supported by two vertically spaced insulator 5 and the damping element 4 located under the platform, and one vibration absorber 7 is located above the free end of the platform 3 and is fixed to the other face on the lever 6, having a D-shaped cross-section in a vertical plane and U-shaped in cross section 8 horizontal plane. On the lever 8 with a U-shaped cross-section in the horizontal plane is fixed at least two insulator 9 and 10 on opposite sides relative to the free end of the platform 3, and at the opposite end of the platform has a damping element 4.

The hydraulic damper is formed of two coaxial cylindrical sleeves - 16 external and internal 17 with the formation of the sealed annular cavity 8, the top of which is closed by a movable annular flange 15 is sealed to the inner and outer surfaces, and the bottom is sealed annular washer 20. In the annular cavity 8 posted by annular piston 21, which divides the cavity 18 into two parts: upper and lower. The piston 21 is made shall be elirueda holes 22 for the passage of damping medium from the lower part of the annular cavity 8 at the top and Vice versa. When the piston 21 is pivotally connected by means of at least three rods 19 with an annular flange 15 on which rests a spring 14, while the upper base of the spring 14 abuts against the cover 12, is rigidly connected with the rod 11 of the damper, and bushing 13 rigidly connected with the cover, serves as a guiding device for the spring 14.

The shaft 11 is coaxially installed cartridges - 16 external and internal 17, and its lower end connected with vibroisolating object (not shown), and the upper cover 12. This arrangement allows the rod 11 to make a pendulum oscillations with amplitude, measured within the diameter of the inner sleeve 17.

Due to the introduction of the pendulum suspension provides additional spatial vibration of the object in all six directions of oscillations (on the three coordinate axes x, y, z, and turning around these axes).

In General, the design of the damper is effective, feasible and meets the requirements of ergonomics and design.

Vibration-damping system works as follows.

Fluctuations vibroisolating object 2 springs 5 and 7 take up vertical loads, thus weakening the dynamic effects on the overlapping buildings. Horizontal loads are perceived by the springs 9 and 10 arranged on the lever 8 with a U-shaped cross section in a horizontal plane. For the odd such schemes perform pendulum suspension provides additional spatial vibration isolation equipment in all six directions of oscillations (on the three coordinate axes x, y, z and rotary oscillations around these axes).

Hydraulic damper works as follows.

Fluctuations vibroisolating object through the guide mechanism is transmitted to the rod 11, with the spring 14 takes the vertical load, thus weakening dynamic effect. Horizontal loads are perceived pendulum suspension. Significantly increase the system damping at the resonant modes are possible due to the dissipation of energy when passing through a throttling orifice 22 in the piston 21.

The proposed vibration-damping system is effective, and is simple in installation and operation.

Vibration-damping system for machines with at least four of insulator having a different stiffness and related support items of equipment, the platform on which is mounted vibrotherapy machine and which is supported by two vertically spaced insulator, and a damping element located under the platform, and one vibration absorber is located above the free end of the platform and secured the other end of the lever having a D-shaped cross-section in a vertical plane and U-shaped in cross section a horizontal plane, characterized in that the lever is U-shaped cross-section in the horizontal plane for repleni at least two insulator from opposite sides relative to the free end of the platform, and at the opposite end of the platform has a damping element, which is formed by two coaxial cylindrical sleeves - external and internal with the formation of the sealed annular cavity, the top of which is closed by a movable annular flange is sealed to the inner and outer surfaces, and the bottom is sealed annular washer, the annular cavity is placed a circular piston with a throttling holes for the passage of damping medium from the lower part of the annular cavity at the top and Vice versa, and the piston is pivotally connected by means of at least three rods with annular flange on which rests a spring, while the upper base of the spring abuts against the cover is rigidly connected with the rod of the damper, and the sleeve is rigidly connected with the cover, serves as a guiding device for the spring, and the rod is coaxially mounted to the cartridge - external and internal, and its lower end connected with vibroisolating object, and top with lid.



 

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