Two-way bearing smooth plane sliding bearing

Abstract

The utility model discloses a bidirectional bearing flexible plane sliding bearing which comprises a loading shaft, a plane sliding bearing I, a supporting plate, a plane sliding bearing II, a gasket and a locking nut. The plane sliding bearing I, the supporting plate, the plane sliding bearing II and the gasket are connected together through the loading shaft and are integrally pre-tightened through the locking nut. According to the utility model, tension-compression bidirectional bearing can be realized in the axial direction, and the bearing capacity is high; follow-up can be carried out in the radial direction, and certain flexibility is achieved; the centrifugal machine vibration table adopting the bidirectional bearing flexible plane moving bearing is simple in composition and compact in structure, can realize three-way or bidirectional vibration, and can solve the oil leakage problem of a hydrostatic bearing and the problems of energy consumption and control nonlinearity caused by a laminated rubber bearing.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration test equipment, and in particular relates to a bidirectional load-bearing compliant plane sliding bearing. Background Art

[0002] Earthquakes are natural disasters that can devastate humans in an instant, causing enormous losses to human life and property. China is one of the countries with the strongest seismic activity in the world. Furthermore, earthquakes in China are characterized by shallow focal depths, wide distribution, high frequency, and high intensity, posing a significant threat to human life and property. Therefore, conducting earthquake-related research, prediction, and earthquake prevention and disaster reduction efforts are of vital importance. Centrifuge vibration tables are currently the most effective and advanced scientific testing platforms for studying geotechnical earthquake engineering and soil dynamics. Most existing centrifuge vibration tables are unidirectional, with only a few bidirectional. However, actual seismic motion is tridirectional, and only a three-dimensional centrifuge vibration table can realistically simulate seismic motion. The development of a three-dimensional centrifuge vibration table is fraught with challenges, the most critical of which is how to achieve guided decoupling of motion. Conventional solutions include linear guides, laminated rubber bearings, and liquid hydrostatic bearings. Each method has its own shortcomings: linear guides have a small load capacity and are not suitable for applications involving vibration and impact; laminated rubber bearings have a certain amount of shear energy consumption and will have a nonlinear effect on waveform control; liquid hydrostatic bearings require an additional hydraulic system, which increases the complexity of the system, and liquid hydrostatic supports have an oil leakage risk in a centrifugal environment, which is difficult to overcome.

[0003] Therefore, it is urgent to develop a centrifuge vibration table motion decoupling device to solve the above problems. Summary of the Invention

[0004] The purpose of the utility model is to provide a bidirectional load-bearing compliant plane sliding bearing to achieve motion decoupling of the centrifuge vibration table. The bearing can effectively transmit vibration in the axial direction and can follow the movement in the radial direction. At the same time, it has a certain degree of flexibility. When the components connected at both ends of the bearing are relatively torsionally connected, the bearing can adapt to a certain angle.

[0005] To achieve the above purpose, the technical solutions provided by the present invention are as follows:

[0006] A bidirectionally load-bearing compliant plane sliding bearing comprises a loading shaft, a plane sliding bearing I, a support plate, a plane sliding bearing II, a gasket and a locking nut; the plane sliding bearing I, the support plate, the plane sliding bearing II and the gasket are connected together via the loading shaft and are pre-tightened as a whole via the locking nut.

[0007] Furthermore, the left end of the plane sliding bearing I is connected to the loading shaft; the right end of the plane sliding bearing I is a convex spherical surface, forming a ball joint with the support plate; the plane sliding bearing I contains balls inside, which can slide radially relative to each other; a through hole is provided in the middle of the plane sliding bearing I for the loading shaft to pass through.

[0008] Furthermore, the right end of the plane sliding bearing II is connected to the gasket; the left end of the plane sliding bearing II is a concave spherical surface, forming a ball joint with the support plate; the plane sliding bearing II contains balls inside, which can slide radially against each other; a through hole is provided in the middle of the plane sliding bearing II for the loading shaft to pass through.

[0009] Furthermore, the left end of the support plate is a concave spherical surface, and the right end is a convex spherical surface, and the center positions of the concave spherical surface and the convex spherical surface are the same; the concave spherical surface of the support plate cooperates with the convex spherical surface of the plane sliding bearing I to form a spherical pair; the convex spherical surface of the support plate cooperates with the concave spherical surface of the plane sliding bearing II to form a spherical pair; a through hole is provided in the middle of the support plate for the loading shaft to pass through, and the size of the through hole needs to reserve a certain space for the radial movement of the loading shaft; the side of the support plate is designed with a connecting flange, which can be connected to other components.

[0010] The beneficial effects of the present invention are:

[0011] 1. The bidirectionally load-bearing compliant plane sliding bearing of the present invention can realize bidirectional tensile and compressive load-bearing in the axial direction by pre-tightening. Moreover, since the support plate contacts the plane sliding bearings I and II respectively through spherical surfaces, the contact area is large, so the axial bearing load capacity is large.

[0012] 2. The bidirectionally loaded compliant plane sliding bearing of the present invention has a certain degree of compliance. When the components connected at both ends of the bearing are subjected to relative torsion, the support plate and the plane sliding bearings 1 and 11 respectively form spherical pairs, so the present invention can perform a certain degree of angular adaptation.

[0013] 3. The utility model is used for the centrifuge vibration table, which can realize three-way or two-way vibration, and has a simple composition and compact structure. It does not have the oil leakage risk of liquid static pressure support, nor does it have the shear energy consumption and nonlinear effect on waveform control of laminated rubber bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view of a bidirectional load-bearing compliant plane sliding bearing of the utility model;

[0015] Figure 2 This is an axonometric view of a bidirectional load-bearing compliant plane sliding bearing of the utility model;

[0016] Figure 3 This is a schematic diagram of the upper structure of the centrifuge vibration table of the present utility model;

[0017] Figure 4 This is a schematic diagram of the lower structure of the centrifuge vibration table of the present utility model;

[0018] Description of reference numerals:

[0019] 1. Bidirectionally loaded compliant plane sliding bearing; 2. Actuator; 3. Vibration table top; 4. Vibration table base; 11. Loading shaft; 12. Plane sliding bearing I; 13. Support plate; 14. Plane sliding bearing II; 15. Gasket; 16. Lock nut. DETAILED DESCRIPTION

[0020] The specific implementation methods of the present invention are further described in detail below with reference to the accompanying drawings. The described implementation cases are only part of the embodiments of the present invention and are not intended to limit the present invention.

[0021] Example 1

[0022] refer to Figure 1 、 Figure 2 A bidirectionally load-bearing compliant plane sliding bearing comprises a loading shaft (11), a plane sliding bearing I (12), a support plate (13), a plane sliding bearing II (14), a gasket (15) and a locking nut (16); the plane sliding bearing I (12), the support plate (13), the plane sliding bearing II (14) and the gasket (15) are connected together through the loading shaft (11) and are pre-tightened as a whole through the locking nut (16).

[0023] In this embodiment, the left end of the plane sliding bearing I (12) is connected to the loading shaft (11); the right end of the plane sliding bearing I (12) is a convex spherical surface, forming a ball joint with the support plate (13); the plane sliding bearing I (12) contains balls inside, which can slide radially relative to each other; a through hole is provided in the middle of the plane sliding bearing I (12) for the loading shaft (11) to pass through.

[0024] In this embodiment, the right end of the plane sliding bearing II (14) is connected to the gasket (15); the left end of the plane sliding bearing II (14) is a concave spherical surface, forming a ball joint with the support plate (13); the plane sliding bearing II (14) contains balls inside, which can slide radially relative to each other; a through hole is provided in the middle of the plane sliding bearing II (14) for the loading shaft (11) to pass through.

[0025] In this embodiment, the left end of the support plate (13) is a concave spherical surface, and the right end is a convex spherical surface, and the center positions of the concave spherical surface and the convex spherical surface are the same; the concave spherical surface of the support plate (13) cooperates with the convex spherical surface of the plane sliding bearing I (12) to form a spherical pair; the convex spherical surface of the support plate (13) cooperates with the concave spherical surface of the plane sliding bearing II (14) to form a spherical pair; a through hole is provided in the middle of the support plate (13) for the loading shaft (11) to pass through, and the size of the through hole needs to reserve a certain space for the radial movement of the loading shaft (11); the side of the support plate (13) is designed with a connecting flange, which can be connected with other components.

[0026] Example 2

[0027] refer to Figure 3 、 Figure 4 A bidirectionally loaded compliant plane sliding bearing is applied to a centrifuge vibration table, wherein a loading shaft (11) of the bidirectionally loaded compliant plane sliding bearing is connected to an actuator (2), a support plate (13) is connected to a vibration table surface (3), and the actuator is fixedly connected to a vibration table base (4).

[0028] In this embodiment, through different combinations of the bidirectionally loaded compliant plane sliding bearing (1) and the actuator (2), the centrifuge vibration table can achieve XYZ three-dimensional, XY bidirectional, XZ bidirectional or YZ bidirectional vibration.

[0029] The above description is only a part of the specific implementation of the present invention and does not limit the present invention. Any changes, modifications, additions, reductions, or substitutions made without departing from the technical solution of the present invention and within the scope of the present invention shall also fall within the scope of protection of the present invention.

Claims

1. A bidirectionally loaded compliant plane sliding bearing, characterized in that: The invention comprises a loading shaft (11), a plane sliding bearing I (12), a support plate (13), a plane sliding bearing II (14), a gasket (15) and a locking nut (16); the plane sliding bearing I (12), the support plate (13), the plane sliding bearing II (14) and the gasket (15) are connected together through the loading shaft (11) and are pre-tightened as a whole through the locking nut (16).

2. A bidirectional load-bearing compliant plane sliding bearing according to claim 1, characterized in that: The left end of the plane sliding bearing I (12) is connected to the loading shaft (11); the right end of the plane sliding bearing I (12) is a convex spherical surface, forming a ball joint with the support plate (13); the plane sliding bearing I (12) contains balls inside, which can slide radially relative to each other; a through hole is provided in the middle of the plane sliding bearing I (12) for the loading shaft (11) to pass through.

3. A bidirectionally load-bearing compliant plane sliding bearing according to claim 1, characterized in that: The right end of the plane sliding bearing II (14) is connected to the gasket (15); the left end of the plane sliding bearing II (14) is a concave spherical surface, forming a ball joint with the support plate (13); the plane sliding bearing II (14) contains balls inside, which can slide radially relative to each other; a through hole is provided in the middle of the plane sliding bearing II (14) for the loading shaft (11) to pass through.

4. A bidirectional load-bearing compliant plane sliding bearing according to claim 1, characterized in that: The left end of the support plate (13) is a concave spherical surface, and the right end is a convex spherical surface, and the center positions of the concave spherical surface and the convex spherical surface are the same; the concave spherical surface of the support plate (13) cooperates with the convex spherical surface of the plane sliding bearing I (12) to form a spherical pair; the convex spherical surface of the support plate (13) cooperates with the concave spherical surface of the plane sliding bearing II (14) to form a spherical pair; a through hole is provided in the middle of the support plate (13) for the loading shaft (11) to pass through, and the size of the through hole needs to reserve a certain space for the radial movement of the loading shaft (11); the side of the support plate (13) is designed with a connecting flange, which can be connected with other components.

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