Centrifuge unidirectional heavy load shaking table
The adaptive support and guidance system solves the problems of structural deformation and overturning moment of the centrifuge heavy-duty vibration table under high load conditions, realizes stable movement of the slide table and reduces wear, and improves the reliability and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING RUIYUAN FUFENG TECH CO LTD
- Filing Date
- 2025-01-14
- Publication Date
- 2026-06-05
AI Technical Summary
Existing centrifuge heavy-duty vibration tables exhibit complex structural deformation under heavy loads, making it difficult for linear guides to adapt. Rubber supports cannot balance the overturning moment and vibration disturbance caused by inertial forces, leading to jamming and premature wear.
An adaptive support and guidance system, consisting of a bottom rigid support, a support sliding support, a guide sliding support, and an anti-overturning support, provides degrees of freedom through the axial deformation of the rubber support and the planar dense ball joint bearing, balancing the complex deformation and overturning moment of the slide table and avoiding jamming and vibration crosstalk.
It achieves adaptive structural deformation under heavy loads, avoids jamming and vibration crosstalk, reduces frictional resistance and energy dissipation, and improves the reliability and durability of the system.
Smart Images
Figure CN224327875U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of vibration testing equipment, specifically relating to a centrifuge unidirectional heavy-load vibration table. Background Technology
[0002] Centrifuge vibration tables are important experimental equipment. Compared with traditional ground vibration tables, they have a significant spatiotemporal compression effect and play an irreplaceable role in the simulation study of geological disasters such as earthquakes.
[0003] With the increasing mass of test loads, there is an urgent need to develop a single-item heavy-load vibration table for centrifuges. Compared to light-load vibration tables, the importance of the support and guidance system for heavy-load vibration tables is becoming increasingly prominent. Linear guides, as a common support and guidance system, while providing good support and guidance, are only suitable for situations with relatively small effective loads, typically in the range of tens or hundreds of kilograms, with centrifugal accelerations in the range of tens of gravitational accelerations. At this level, structural deformation is small and the deformation state is not too complex, and linear guides can generally perform their support and guidance functions normally without jamming. For effective loads of several tons, the structural deformation under centrifugal force becomes extremely complex, and the deformation becomes significant. Linear guides struggle to adapt to such complex and substantial deformation conditions. Simultaneously, the overturning moment caused by inertial forces during vibration is also substantial, leading to significant vibration disturbance.
[0004] To cope with complex deformation under heavy loads, multiple rubber bearings are sometimes used to support the sliding table. Distributed rubber bearings can adapt to structural deformation by changing their axial dimensions. However, when the vibration amplitude is large, the energy dissipated by the shear deformation of the rubber caused by vibration cannot be ignored. In addition, since rubber bearings can only withstand compressive loads and not tensile loads, they cannot balance the overturning moment caused by inertial forces during vibration and cannot solve the resulting vibration disturbance. Utility Model Content
[0005] This invention addresses the support and guidance problems of a unidirectional heavy-duty vibration table for centrifuges and the balance of overturning moment caused by inertial forces. It proposes a new unidirectional heavy-duty vibration table for centrifuges, which can adapt to complex structural deformation through a new support and guidance method, avoiding jamming and the resulting vibration crosstalk and premature wear of the system. The method is simple, reliable, and easy to implement in engineering.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows:
[0007] A centrifuge unidirectional heavy-duty vibration table comprises a bottom rigid support, a supporting sliding support, a slide, an actuator, a planar ball bearing, a guide sliding support, an anti-overturning support, a clamping screw, and a geared motor. The bottom rigid support provides rigid support for the entire vibration table. The lower end of the supporting sliding support is fixedly connected to the bottom rigid support, and the upper end is fixedly connected to the slide, balancing the centrifugal force on the slide and providing unidirectional motion freedom for the slide. The slide provides support and corresponding motion for the effective load. One end of the planar ball bearing is connected to the slide, and the other end is connected to the actuator, providing planar motion perpendicular to the direction of slide motion and three-dimensional motion. The slide has a partial degree of freedom for axial rotation, and the actuator can be a hydraulic cylinder or an electromagnetic cylinder. The guide sliding support is installed on the side of the slide, with one end fixed to the rigid support and the other end fixed to the side of the slide, providing motion support and guidance for the slide. The anti-overturning support is installed on the upper surface of the front and rear ends of the slide, with one end fixed to the upper surface of the slide and the other end pressed by the clamping screw to balance the overturning moment of the slide. One end of the clamping screw is connected to the anti-overturning support through a ball joint, and the other end is connected to the bottom rigid support. The clamping screw is extended and retracted by the drive of the geared motor, thereby pressing the anti-overturning support onto the upper surface of the slide.
[0008] The supporting sliding support consists of two parts connected in series: a rubber support one fixed to the bottom rigid support, and a planar ball bearing one fixed to the slide table. Multiple supporting sliding supports are installed between the slide table and the bottom rigid support to effectively balance the centrifugal force on the slide table. The axial deformation of the rubber support one adapts to the different structural deformations that may occur in different parts of the slide table. The planar ball bearing one provides the degree of freedom required for the vibration of the slide table. The multiple supporting sliding supports not only effectively balance the hypergravity force on the slide table, but also prevent jamming during the vibration of the slide table.
[0009] The planar ball joint bearing is fixedly connected to the actuator, providing planar motion perpendicular to the vibration direction and local rotational degrees of freedom around three axes, and bearing bidirectional tensile and compressive driving loads.
[0010] The guide sliding support consists of two parts connected in series. The part fixed to the bottom rigid support is a rubber support two, and the part fixed to the slide is a planar ball bearing two. Multiple guide sliding supports are pre-pressed onto the side of the slide. Through the axial deformation of the rubber support two, it adapts to the different possible deformations of different parts of the slide structure during vibration. The planar ball bearing two provides the vibration degree of freedom required for the slide vibration. The multiple guide sliding supports not only support and guide the vibration of the slide, preventing the slide from swaying during vibration, but also avoid jamming during the vibration of the slide.
[0011] The anti-overturning support consists of three parts connected in series: a ball joint plate, a rubber bearing, and a planar ball bearing. Multiple anti-overturning supports are pressed onto the upper surfaces at both ends of the slide by clamping screws. The axial deformation of the rubber bearing adapts to the different deformations that may occur in different parts of the slide during vibration. The planar ball bearing provides the degree of freedom required for the slide vibration. The multiple anti-overturning supports not only balance the overturning moment on the slide but also effectively prevent jamming during the slide vibration process.
[0012] One end of the clamping screw is clamped to the anti-overturning support through a ball joint plate, and the other end is connected to the bottom rigid support. The clamping screw is extended and retracted by the drive of the geared motor, thereby pressing the anti-overturning support onto the upper surface of the slide. The clamping force can be effectively controlled by the extension and retraction of the clamping screw. Each clamping screw corresponds to one anti-overturning support.
[0013] The number or arrangement of the supporting sliding bearings, planar ball bearings, guide sliding bearings, and anti-overturning bearings can be selected according to different loads and structural dimensions.
[0014] The beneficial effects of this invention are:
[0015] 1) This invention adapts to the structural deformation of the slide by changing the axial compression of the rubber support, thereby avoiding jamming during vibration.
[0016] 2) This invention provides the required degrees of freedom for vibration through planar ball bearings, with low rolling friction resistance and minimal energy dissipation.
[0017] 3) The present invention clamps the slide table by tightening the screw and the anti-overturning support, which can effectively balance the overturning moment generated during the vibration of the slide table, and at the same time will not cause the slide table to jam during the vibration.
[0018] 4) The supporting sliding bearing, guiding sliding bearing, and anti-overturning bearing of the present invention are modularly designed in terms of structure, and can be combined according to different load requirements, which facilitates engineering implementation. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of this utility model, the drawings used in the following description are briefly introduced. The drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:
[0020] Figure 1 This is a structural schematic diagram of a unidirectional heavy-duty vibration table for a centrifuge, provided in a specific embodiment of this utility model.
[0021] Figure 2 This is a front cross-sectional view of a centrifuge unidirectional heavy-duty vibration table according to a specific embodiment of this utility model.
[0022] Figure 3 This is a structural schematic diagram of the sliding support provided in a specific embodiment of the present invention.
[0023] Figure 4 This is a schematic diagram of the drive connection structure provided in a specific embodiment of the present invention.
[0024] Figure 5 This is a structural schematic diagram of the guide sliding support provided in a specific embodiment of this utility model.
[0025] Figure 6 This is a structural schematic diagram of the anti-overturning support provided in a specific embodiment of this utility model.
[0026] Figure 7 This is a schematic diagram of the installation of the anti-overturning support provided in a specific embodiment of this utility model.
[0027] In the diagram, the numbers represent: 1-bottom rigid support, 2-support sliding support, 201-flat ball bearing one, 202-rubber bearing one, 3-slide table, 4-actuator, 5-flat ball bearing, 6-guide sliding support, 601-flat ball bearing two, 602-rubber bearing two, 7-anti-overturning support, 701-flat ball bearing three, 702-rubber bearing three, 703-ball socket plate, 8-clamping screw, and 9-gear motor. Detailed Implementation
[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.
[0029] A centrifuge unidirectional heavy-duty vibration table is composed of a bottom rigid support (1), a supporting sliding support (2), a slide (3), an actuator (4), a planar ball bearing (5), a guide sliding support (6), an anti-overturning support (7), a clamping screw (8), and a geared motor (9). The bottom rigid support (1) provides rigid support for the entire vibration table. The lower end of the supporting sliding support (2) is fixedly connected to the bottom rigid support (1), and the upper end is fixedly connected to the slide (3), balancing the centrifugal force on the slide (3) and providing the unidirectional motion degree of freedom of the slide (3). The slide (3) provides support and corresponding motion for the effective load. One end of the planar ball bearing (5) is connected to the slide, and the other end is connected to the actuator (4), providing a plane perpendicular to the motion direction of the slide (3). The actuator (4) can be a hydraulic cylinder or an electromagnetic cylinder for the motion and local degrees of freedom of rotation around three axes; the guide sliding support (6) is installed on the side of the slide (3), one end of which is fixedly connected to the rigid support (1) and the other end is fixedly connected to the side of the slide (3), providing motion support and guidance for the slide (3); the anti-overturning support (7) is installed on the upper surface of the front and rear ends of the slide (3), one end of which is fixedly connected to the upper surface of the slide (3), and the other end is pressed by the clamping screw (8) to balance the overturning moment of the slide (3); one end of the clamping screw (8) is ball-jointed with the anti-overturning support (7), and the other end is connected to the rigid support. The clamping screw (8) is extended and retracted by the drive of the geared motor, thereby pressing the anti-overturning support (7) onto the upper surface of the slide (3).
[0030] The supporting sliding support (2) consists of two parts connected in series. The part fixed to the bottom rigid support (1) is a rubber support (202), and the part fixed to the slide (3) is a planar ball bearing (201). Multiple supporting sliding supports (2) are installed between the slide (3) and the bottom rigid support (1) to effectively balance the centrifugal force on the slide (3). Through the axial deformation of the rubber support (202), different structural deformations that may occur in different parts of the slide (3) are adapted. The planar ball bearing (201) provides the degree of freedom required for the vibration of the slide (3). Multiple supporting sliding supports (2) not only effectively balance the hypergravity force on the slide (3), but also avoid jamming during the vibration of the slide (3).
[0031] The planar ball bearing (5) is fixedly connected to the actuator (4). The planar ball bearing (5) provides planar motion perpendicular to the vibration direction and local rotational degrees of freedom about three axes, and bears bidirectional tensile and compressive driving loads.
[0032] The guide sliding support (6) consists of two parts connected in series. The part fixed to the bottom rigid support (1) is the second rubber support (602), and the part fixed to the slide (3) is the second planar ball bearing (601). Multiple guide sliding supports (6) are pre-pressed on the side of the slide (3). Through the axial deformation of the second rubber support (602), it adapts to the possible different deformations of different parts of the slide (3) during vibration. The second planar ball bearing (601) provides the vibration degree of freedom required for the vibration of the slide (3). Multiple guide sliding supports (6) not only support and guide the vibration of the slide (3) to prevent the slide (3) from swinging during vibration, but also avoid the slide (3) from getting stuck during vibration.
[0033] The anti-overturning support (7) consists of three parts connected in series, namely, a ball socket plate (703), a rubber support three (702), and a planar ball bearing three (701). Multiple anti-overturning supports (7) are pressed onto the upper surfaces of both ends of the slide table (3) by clamping screws (8). The axial deformation of the rubber support three (702) adapts to the possible different deformations of different parts of the slide table (3) during vibration. The planar ball bearing three (701) provides the degree of freedom required for the vibration of the slide table (3). Multiple anti-overturning supports (7) not only balance the overturning moment on the slide table (3), but also effectively prevent the slide table (3) from jamming during movement.
[0034] One end of the clamping screw (8) is clamped to the anti-overturning support (7) through the ball socket plate (703), and the other end is connected to the bottom rigid support (1). The clamping screw (8) is extended and retracted by the drive of the reduction motor (9), thereby pressing the anti-overturning support (7) onto the upper surface of the slide table (3). The clamping force can be effectively controlled by the extension and retraction of the clamping screw (8). Each clamping screw (8) corresponds to one anti-overturning support (7).
[0035] The number or arrangement of the supporting sliding bearing (2), the planar ball bearing (5), the guide sliding bearing (6), and the anti-overturning bearing (7) can be selected according to different loads and structural dimensions.
[0036] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.
Claims
1. A unidirectional heavy-duty vibration table for centrifuges, characterized in that, It consists of a bottom rigid support, a supporting sliding support, a slide table, an actuator, a planar ball joint bearing, a guide sliding support, an anti-overturning support, a clamping screw, and a geared motor. The bottom rigid support provides rigid support for the entire vibration table. The lower end of the supporting sliding support is fixed to the bottom rigid support, and the upper end is fixed to the slide table, balancing the centrifugal force on the slide table and providing unidirectional motion freedom for the slide table. The slide table provides support and corresponding motion for the effective load. One end of the planar ball joint bearing is connected to the slide table, and the other end is connected to the actuator, providing planar motion perpendicular to the direction of slide table motion and rotation around three axes. The slide has multiple degrees of freedom, and the actuator can be either a hydraulic cylinder or an electromagnetic cylinder. The guide sliding support is installed on the side of the slide, with one end fixed to the rigid support and the other end fixed to the side of the slide, providing motion support and guidance for the slide. The anti-overturning support is installed on the upper surface of the front and rear ends of the slide, with one end fixed to the upper surface of the slide and the other end pressed by the clamping screw to balance the overturning moment of the slide. One end of the clamping screw is connected to the anti-overturning support through a ball joint, and the other end is connected to the bottom rigid support. The clamping screw is extended and retracted by the drive of the geared motor, thereby pressing the anti-overturning support onto the upper surface of the slide.
2. The centrifuge unidirectional heavy-duty vibration table according to claim 1, characterized in that, The supporting sliding support consists of two parts connected in series: a rubber support one fixed to the bottom rigid support, and a planar ball bearing one fixed to the slide table. Multiple supporting sliding supports are installed between the slide table and the bottom rigid support to effectively balance the centrifugal force on the slide table. The axial deformation of the rubber support one adapts to the different structural deformations that may occur in different parts of the slide table. The planar ball bearing one provides the degree of freedom required for the vibration of the slide table. The multiple supporting sliding supports not only effectively balance the hypergravity force on the slide table, but also prevent jamming during the vibration of the slide table.
3. The centrifuge unidirectional heavy-duty vibration table according to claim 1, characterized in that, The planar ball joint bearing is fixedly connected to the actuator, providing planar motion perpendicular to the vibration direction and local rotational degrees of freedom about three axes, and bearing bidirectional tensile and compressive driving loads.
4. The centrifuge unidirectional heavy-duty vibration table according to claim 1, characterized in that, The guide sliding support consists of two parts connected in series. The part fixed to the bottom rigid support is a rubber support two, and the part fixed to the slide is a planar ball bearing two. Multiple guide sliding supports are pre-pressed onto the side of the slide. Through the axial deformation of the rubber support two, it adapts to the different possible deformations of different parts of the slide structure during vibration. The planar ball bearing two provides the degree of freedom required for the vibration of the slide. The multiple guide sliding supports not only support and guide the vibration of the slide, preventing swaying during vibration, but also avoid jamming during the vibration of the slide.
5. A centrifuge unidirectional heavy-duty vibration table according to claim 1, characterized in that, The anti-overturning support consists of three parts connected in series: a ball joint plate, a rubber bearing, and a planar ball bearing. Multiple anti-overturning supports are pressed onto the upper surfaces at both ends of the slide by clamping screws. The axial deformation of the rubber bearing adapts to the different deformations that may occur in different parts of the slide during vibration. The planar ball bearing provides the degree of freedom required for the slide vibration. The multiple anti-overturning supports not only balance the overturning moment on the slide but also effectively prevent jamming during the slide vibration process.
6. A centrifuge unidirectional heavy-duty vibration table according to claim 1, characterized in that, One end of the clamping screw is clamped to the anti-overturning support through a ball joint plate, and the other end is connected to the bottom rigid support. The clamping screw is extended and retracted by the drive of the geared motor, thereby pressing the anti-overturning support onto the upper surface of the slide. The clamping force can be effectively controlled by the extension and retraction of the clamping screw. Each clamping screw corresponds to one anti-overturning support.
7. A centrifuge unidirectional heavy-duty vibration table according to claim 1, characterized in that, The number or arrangement of the supporting sliding bearings, planar ball bearings, guide sliding bearings, and anti-overturning bearings can be selected according to different loads and structural dimensions.