Vibroisolating system for machine tools

FIELD: machine building.

SUBSTANCE: proposed system comprises platform resting on two vibroisolators and damping element arranged there under. One vibroisolator is arranged above the platform free end and secured at the lever. Two vibroisolators are secured at the lever opposite ends relative to platform free end. Damping element is secured at the platform opposite end. Every said vibroisolator comprises the case rigidly connected with the base composed by round centre plate. Damper is secured to case base with the help of upper pressure plate. Said damper comprises gauze elastic element to be locked by upper and lower plates to rest on the base. Said base is composed by the plate with mounting holes. Lower plate is connected with the base. Upper pressure plate is connected with central ring clamped by coaxial ring connected with the base.

EFFECT: efficient damping in resonance mode, simplified design and assembly.

3 dwg

 

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

The closest technical solution to the declared object is picked-up system according to the patent of Russian Federation №2451848, (prototype)that contains at least four of the insulator, 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, and the lever is U-shaped cross-section in the horizontal plane is fixed at least two of insulator on opposite sides relative to the free end of the platform and at the opposite end of the platform has a damping element.

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

The technical result - increasing the efficiency of the vibration in the resonant mode and the simplification of the structure and the redecoration of the MS.

This is achieved in that in the vibration-insulating system for machine tools, comprising 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 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, and the lever is U-shaped cross-section in the horizontal plane is fixed, at least two of insulator on opposite sides relative to the free end of the platform and at the opposite end of the platform is installed the damping element, the upper limiter serves as an upper providentialism element made of elastomer, and a threaded sleeve fixed screw for connection of the elastic element with vibroisolating object, while there is also a mesh damper.

Figure 1 shows the General layout of the proposed vibration-insulating system, figure 2 is a top view of figure 1, figure 3 is a frontal section of the insulator.

Vibration-damping system for machine tools (figure 1 and figure 2) comprises a base 1 and at least four of insulator 5,7,9, and 10 having different stiffness and related support elements on which orogovenia. 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 fastened the other end to 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.

Each of the vibration isolators (figure 3) includes a housing 18, is rigidly associated with the base 11 made in the form of a circular thrust bearing, on which rests the lower cylindrical providentiae element 14 of elastomer with an axial cylindrical bore 12 that performs the functions of the lower limit switch spring 22.

Elastic element of insulator is made of a spring 22, which axis is perpendicular to the base 11. The spring 22 communicates with the upper and lower stroke limits through the lower bearing Cup 23 and the top cover spring cover 19, which is rigidly connected with the axisymmetric spring 22 of the threaded sleeve 16. is the cover 19 fixed upper limit switch spring 22, made in the form of a cylindrical sleeve 15 covering the top of the cover 19. Upper limiter serves as an upper providentialism element made of elastomer. In the threaded sleeve 16 is fixed to the screw 17 for connection of the elastic element with vibroisolating object (not shown). Case 18 in the upper part is connected to the cover 20, on the end surfaces of which facing vibroisolating object attached elastic stopper 21 dynamic travel of the object, made of elastomer. In the cover 20, perpendicular to its axis, made a hole 13 for injection into the lubricating system of viscous material such as grease.

To the base 11 of the housing 18, is made in the form of a circular thrust bearing, rigidly attached mesh damper by means of the upper pressure washers 28.

Net damper comprises a base 14 in the form of a plate with the mounting holes 25, mesh elastic element 30, the lower part resting on the base 24, and the fixed bottom plate 29, is rigidly connected with the base 24, and the upper part of the fixed upper pressure plate 28 rigidly connected to a centrally located ring 17 covered coaxially located by the ring 26, is rigidly connected to the base 24.

The density of the mesh structure elastic mesh element is in an optimal range of values: 1,2 is/cm...2.0 g/cm, moreover, the material of the elastic wire mesh elements - steel EI-708, and its diameter is optimum interval values 0,09 0,15 mm...mm

The density of the mesh structure of the outer layers of elastic mesh element is 1.5 times the density of the mesh structure of the inner layers of elastic mesh element.

Elastic mesh element 30 may be performed by a combination of mesh cage filled with elastomer, for example polyurethane.

Vibration-damping system works as follows.

Fluctuations vibroisolating object 2 springs 5 and 7 takes the vertical load, 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. Due to 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).

Under the application of static loads on the object, it goes down, compressing the spring 22, which senses the vertical load, thus weakening the dynamic impact on the base 11 mounted on the intermediate floor of the building or chassis transport the CSOs means (not shown). Nonlinear damping in the system is due to the presence of the bottom 14 and top 15 restrictors spring 22, is made of elastomer. Horizontal oscillations are damped due to the unfettered (with a clearance) location lower bearing Cup 23 of the spring 22 and the upper cover spring cover 19.

Under the application of dynamic loads from the side of the object, such as operating equipment, vibration is suppressed by the spring 22 and providentiality elements 14 and 15, the rigidity of which is calculated on complex systems "overlap-elastic elements-object" in the above-resonance mode.

The proposed solution is effective vibration protection tool that can be used to protect both the equipment and operator, with ease of service and reliability in operation.

Vibration-damping system for machine tools, comprising 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 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, and the lever is U-shaped cross-section in Gori is ostalnoe 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, and each of the vibration isolators includes a housing which is rigidly connected with the base, made in the form of a circular thrust bearing, on which rests the lower cylindrical providentiae element of elastomer with an axial cylindrical bore, performing the functions of the lower limit switch spring, the axis of which is perpendicular to the ground, with the spring cooperates with the upper and lower stroke limits through the lower bearing Cup and the top cover spring cover, which is rigidly connected with the axisymmetric spring screw sleeve, and the cover is fixed the upper limit switch spring, made in the form of a cylindrical sleeve covering the top cover, the upper limiter serves as an upper providentialism element made of elastomer, and a threaded sleeve fixed screw for connection of the elastic element with vibroisolating object, in this case in the upper part is connected with the cap, on the end surfaces of which facing vibroisolating object attached elastic limiter dynamic travel of the object, made of elastomer, and a cover, the perpendicular is about its axis, made a hole for injection into the lubricating system of viscous material such as grease, characterized in that thethe base, made in the form of a circular thrust bearing, rigidly attached mesh damper through the top of the pressure washer that holds the base plate with the mounting holes, mesh elastic element, the lower part resting on the base and fixed bottom washer rigidly connected with the base and the upper part of the fixed upper pressure plate rigidly connected to a centrally located ring covered coaxially located ring rigidly connected to the base.



 

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