Damping unit

FIELD: mechanical engineering.

SUBSTANCE: damping unit comprises housing with a space filled with viscous liquid and movable vertical member submerged in the liquid. The top section of the movable member receives pivot for the end of the rotor shaft and ends of the centering springs. The other ends of the centering springs are secured to the housing. The bottom section of the movable member is mounted on the pivot of the flexible diaphragm whose periphery is secured to the housing. The damping member is connected to the diaphragm and interposed between the diaphragm and bottom of the space.

EFFECT: expanded frequency band of damping.

12 cl, 2 dwg

 

The invention relates to mechanical engineering and can be used in vertical rotors rapidly rotating machines and devices, for example, energy storage devices, centrifuges.

Known damper oscillations of rapidly rotating rotor with a vertical axis of rotation (Patent RU №2121089, F 16 F 15/02, 29.05.1996)containing pivotally supported in a fluid-filled reservoir movable element of stepped form with a bearing to support the rotor and the centering springs at the top, cross the separating membrane, which is tightly connected with the tank wall and the lower thickened part of the rolling element made in the form of an open bottom of the hollow of the damping cylinder, and a Central bearing pin at the bottom of the reservoir with a gap in the cavity of the damping cylinder. The center of rotation of the hinge is located in the plane of the dividing membrane.

Known damper simple design effectively reduces both low-frequency and high-frequency radial vibrations of the rotor and has a high stability of the damping characteristics, however, cannot be used for damping vertical oscillations, for example, multi-tiered rotors.

Closest to the invention, the technical solution is the basic unit vectors of the vertical rotor (U.S. patent No. 5090822, F 16 25/00, 25.02.92), p is rednaznachenie for damping radial as and vertical forces produced by the rotation of the centrifuge rotor. Basic unit includes a housing with a cavity filled with damping fluid, in which is mounted a movable cylindrical element. In the upper part of the rolling element has a supporting bearing for the rotor shaft with a spherical bearing and a damping cap with axial and radial holes. To the lower part of the rolling element at a right angle to its longitudinal axis is fixed a circular membrane, the outer edge of which is fixed to the inner wall of the housing. Between the membrane and the bottom of the body has a limiting deflection of the membrane support.

This damper can not provide effective damping in a wide range of frequencies (low and high frequency vibrations due to the great cast to support the rotor mass of the moving element, so as mutual arrangement of the damping surfaces (radial and axial) is not optimal.

The task, which is aimed by the invention is the extension of the frequency range of effective damping of vertical vibrations of the rotor.

The problem is solved in that a damping node supports vertical rotor, comprising a housing with a cavity filled with a viscous fluid, and shipped it extended in the vertical direction is the situation movable element, in the upper part of which a thrust bearing for supporting the shaft end of the rotor and secured to the ends of the centering springs, the other ends attached to the housing, and the lower part is installed on a hinge mounted on an elastic membrane attached on the periphery of the housing, between the membrane and the bottom of the cavity has a damping element attached to the membrane.

Additionally, the damping element is connected with the diaphragm by a rod.

In addition, the damping element is connected with the elastic membrane element, for example, coil springs.

Additionally, the damping element is designed in the form of a flat circular plate.

In addition, between the membrane and the damping element mounted partition, fixed in the case.

An additional damping element mounted bearing limiting the axial deflection of the diaphragm relative to the bottom of the cavity.

In addition, at the bottom of the cavity bearing installed, limiting the axial displacement of the damping element relative to the bottom of the cavity.

Additional support is executed in the form of an elastic element, for example, in the form of helical springs.

In addition, the membrane is made of two or more through holes.

Additionally, the damping element is made of two or more through holes.

In addition, the partition wall is made of two or more squozen the x holes.

Additionally,the movable element is made in the form of a stepped cylinder shape, thickened lower part of which forms a radial damping gap with the case.

In addition, the movable element is connected to the elastic hinge connection, for example, an elastic rod.

The invention is additionally illustrated by the attached drawings, where:

figure 1 shows a General view of a variant of the damping Assembly;

figure 2 shows an embodiment of the damping elements of the node.

Damping the site supports a vertical rotor includes a housing 1 with a cavity 2 is filled with a viscous fluid 3, which shipped extended in the vertical direction of the movable element 4. In the upper part of the element 4 has a thrust bearing 5 for supporting the end of the shaft 6 of the rotor 7 and the fixed ends of the centering springs 8, the other ends attached to the housing 1. The lower portion of the element 4 is installed on the hinge 9, fixed on the elastic membrane 10, is attached on the periphery of the case 1, the ring 11. Between the membrane 10 and the bottom 12 of the cavity 2 has a damping element 13 made in the form of a flat circular plate connected to the diaphragm 10 by the rod 14.

Between the membrane 10 and the damping element 13 is installed partition 15, fixed in the housing 1. On the damping element 13 is installed bearing 16 limiting the axial deflection of the membrane 10 on the relative bottom 12 of the cavity 2. In the membrane 10, the damping element 13 and the partition wall 15 is made in two or more through holes 17, 18 and 19, respectively, for the passage of damping liquid 3. The movable element 4 is made in the form of a stepped cylinder shape, the lower thickened portion 20 which forms a radial damping gap with the housing 1 and connected with the hinge 9 of the elastic connection in the form of an elastic rod 21.

In the embodiment of figure 2 the damping element 13 is connected to the diaphragm 10 by the elastic element in the form of a helical spring 22, and bearing limiting the axial displacement of the damping element 13 relative to the bottom of the cavity 12, made in the form of helical springs 23 and mounted on the bottom 12 of the cavity 2.

The operation of the damping node is as follows.

During rotation of the rotor 7 different modes of operation can occur its radial and axial vibrations caused by the rotor unbalance and destabilizing perturbations. When the radial vibrations of the shaft 6 for the thrust bearing 5 deflects the movable element 4 on the hinge 9 and moves it into the cavity 2 with the viscous fluid 3. The movement of the rolling element 4 in a viscous fluid 3 causes the absorption of the vibration energy of the rotor 7 and inhibits its radial oscillations, and the centering of the spring 8 returns the movable element 4 and the rotor 7 to the original position.

Axial vibrations of the rotor 7 of the shaft 6 through p is dpatrick 5, the movable element 4 and the hinge 9 loads and prohibit membrane 10, is connected by a rod 14 with a circular plate 13, which moves in the cavity with a viscous fluid and absorbs the vibration energy of the rotor 7 and inhibits its axial oscillations. The elastic membrane 10 returns the movable element 4 and the rotor 7 to the original position.

The extension of the frequency range of effective damping radial vibrations of a vertical rotor 7 is achieved by performing the rolling element 4 a stepped shape with a thickened lower part 20, which is moved near the wall of the housing 1 and reduces the effective mass of the moving element 4 at low frequencies, and the connection with the hinge 9 of the elastic connection in the form of an elastic rod 21 allows you to adjust the amount of damping in the desired frequency range.

Increase the effectiveness of the damping axial vibrations of the rotor 7 is achieved by attaching the partition 15 between the membrane 10 and the damping element 13 and run through holes 17, 18, 19 for the flow of damping fluid during the displacement of the membrane 10 and the damping element 13 relative to the partition wall 15 and the bottom 12 of the housing 1.

The connection of the damping element 13 with the diaphragm 10 by the elastic element in the form of a helical spring 22 allows you to adjust the frequency range of the axial damping, and in the execution of a support, limiting the load of the elastic membrane 10 and the axial displacement of the damping element 13 relative to the bottom of the cavity 12, in the form of a helical spring 23, eliminates shock loads between the shaft 6 and the thrust bearing 5 and increases the efficiency of support.

1. Damping the site supports a vertical rotor, comprising a housing with a cavity filled with a viscous fluid, and shipped it extended in the vertical direction of the movable element, in the upper part of which a thrust bearing for supporting the shaft end of the rotor and secured to the ends of the centering springs, the other ends attached to the housing, and the lower part is installed on a hinge mounted on an elastic membrane attached on the periphery of the housing, characterized in that between the membrane and the bottom of the cavity has a damping element attached to the membrane.

2. Damping the node according to claim 1, characterized in that the damping element is connected with the diaphragm by a rod.

3. Damping the node according to claim 1, characterized in that the damping element is connected with the elastic membrane element, for example a helical spring.

4. Damping the node according to claim 1, characterized in that the damping element is designed in the form of a flat circular plate.

5. Damping the node according to claim 1, characterized in that between the membrane and the damping element mounted partition, fixed the traveler in case.

6. Damping the node according to claim 1, characterized in that the damping element mounted bearing limiting the axial deflection of the diaphragm relative to the bottom of the cavity.

7. Damping the node according to claim 1, characterized in that on the bottom of the cavity bearing installed, limiting the axial displacement of the damping element relative to the bottom of the cavity.

8. Damping the node according to claim 6 or 7, characterized in that the support is executed in the form of an elastic element, for example in the form of helical springs.

9. Damping the node according to claim 1, characterized in that the membrane is made of two or more through holes.

10. Damping the node according to claim 1, characterized in that the damping element is made of two or more through holes.

11. Damping the node according to claim 5, characterized in that the partition wall is made of two or more through holes.

12. Damping the node according to claim 1, characterized in that the movable element is made in the form of a stepped cylinder shape, thickened lower part of which forms a radial damping gap with the case.

13. Damping the node according to claim 1, characterized in that the movable element is connected to the elastic hinge connection, such as an elastic rod.



 

Same patents:

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