A limited vibration isolation device and installation method thereof

Abstract

The present invention relates to the field of vibration isolation technology, and specifically provides a limit vibration isolation device and an installation method thereof. The device includes an upper limit mechanism, a lower limit mechanism, a steel wire rope, and a locking assembly; the upper limit mechanism includes an upper mounting plate and a limit upper plate; the lower limit mechanism includes a limit lower plate and a lower mounting plate; a sink groove is provided at the center of the limit lower plate, and the sink groove is used to accommodate a limit column; the upper limit mechanism and the lower limit mechanism are connected by a steel wire rope, and the steel wire rope is passed through the cylindrical through hole on one side, and the holes are alternately placed up and down, and then passed out from the cylindrical through hole on the other side. The upper limit mechanism and the lower limit mechanism clamp the steel wire rope to form a multi-turn spiral ring structure, so that the length h2 of the limit column penetrating into the inside of the sink groove is ≥0.5mm; the two ends of the steel wire rope are fixed with a locking assembly. The present invention adopts the form of matching the steel column with the polytetrafluoroethylene ring, which improves the vibration reduction and buffering performance of the device.

Description

Technical Field

[0001] The present invention relates to the field of vibration isolation technology, and in particular to a position limiting vibration isolation device and an installation method thereof. Background Art

[0002] Wire rope isolators are a type of vibration isolation component widely used in equipment. Due to their good damping characteristics, strong environmental adaptability, long service life, diverse installation methods, good buffering resistance, and easy installation, they are suitable for shock absorption, vibration isolation, and impact resistance in various structures, and play a vital role in load equipment in aerospace, aviation, and other fields.

[0003] The wire rope isolator is a nonlinear vibration isolation device. Its principle is to use a frame bar to fix the wire rope, and the wire is fixed in a spiral shape. This structure can produce a three-dimensional deformation of the wire rope, which is similar to the effect of spring shock absorption. While deforming, the wire rope causes dry friction, and the reaction force is generated through the change of its spiral structure to achieve a shock absorption effect.

[0004] Traditional wire rope vibration isolators only consider the load-bearing capacity and shock absorption effect of the wire rope, while ignoring the relative displacement between the two pairs of wire rope pressure plates. If there are strict requirements on the displacement of the pressure plates before and after shock absorption, general shock absorbers cannot be used, so it is necessary to add a limit mechanism to the shock absorption equipment. The limit structure plays a role of limitation and support, but traditional shock absorbers generally ignore the displacement of the equipment in three directions; the installation interface of many types of wire ropes is buried in the middle of the wire rope, and there will be problems with the reserved position of the installation interface and the interference of the wire rope, which is not conducive to the installation of screws and equipment; the contact area of ​​the pressure plate is too small to be installed with the equipment structure; at the same time, some limit design structures use the combination of columns and rubber. Because the rubber material is soft and difficult to process, it is easy to produce debris after long-term use. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a position limiting vibration isolation device and an installation method thereof.

[0006] The first object of the present invention is to provide a limit vibration isolation device, comprising an upper limit mechanism, a lower limit mechanism, a steel wire rope, and a locking assembly; the upper limit mechanism and the lower limit mechanism are connected by a steel wire rope, and the upper limit mechanism and the lower limit mechanism clamp the steel wire rope to form a multi-turn spiral ring structure; the two ends of the steel wire rope are fixed by a locking assembly;

[0007] The upper limit mechanism comprises an upper mounting plate and an upper limit plate;

[0008] A mounting hole is provided at the center of the plane of the upper mounting plate, which is used to install bolts to fasten the limit vibration isolation device to other equipment; a plurality of first screw holes are evenly distributed on both sides of the mounting hole; and a plurality of semicircular grooves are provided on the bottom surface of the upper mounting plate at positions between each two first screw holes;

[0009] The upper limit plate is provided with a plurality of second screw holes, which correspond to the positions of the first screw holes one by one and are used to install bolts to fasten the upper mounting plate and the upper limit plate; the upper surface of the upper limit plate is provided with a plurality of semicircular grooves; the positions of the second semicircular grooves correspond to the positions of the first semicircular grooves to form a cylindrical through hole for assembling a steel wire rope; the center of the lower bottom surface of the upper limit plate has a raised columnar structure, which is a limit column;

[0010] The lower limit mechanism comprises a limit lower plate and a lower mounting plate; the limit lower plate is fixedly connected to the lower mounting plate, and the cross-sectional area of ​​the lower mounting plate is larger than that of the limit lower plate;

[0011] A sink groove is provided at the center of the limit lower plate for accommodating the limit column; the limit column goes deep into the sink groove; a polytetrafluoroethylene ring is installed on the inner wall of the sink groove to limit the mutual collision between the limit column and the sink groove; a plurality of semicircular grooves are provided at corresponding positions on the lower bottom surface of the limit lower plate and the upper surface of the lower mounting plate, and a lower limit mechanism is formed when the limit lower plate is fastened to the lower mounting plate, and the cylindrical through hole on the side is used to assemble the wire rope;

[0012] The lower mounting plate is provided with holes for installing bolts to fasten the position limiting vibration isolation device to other equipment.

[0013] Preferably, the lower edge of the limiting column is an oblique chamfer, and the chamfer value is C0.5.

[0014] Preferably, the limiting column is a cylinder, and the sink is a cylindrical groove.

[0015] Preferably, the multi-turn spiral ring structure is an axisymmetric multi-turn spiral ring structure with the limiting column as the symmetry axis.

[0016] Preferably, the length h of the limit column extending into the interior of the sink is 2 ≥0.5mm.

[0017] Preferably, the steel wire rope is made of stainless steel wire.

[0018] Preferably, the bottom edge of the sink groove of the limiting lower plate has a circle of depression, which is used to embed the bottom of the polytetrafluoroethylene ring into the depression.

[0019] The second object of the present invention is to provide a method for installing a position limiting vibration isolation device, comprising the following steps:

[0020] S1. Grind and correct each component before installation to ensure flatness;

[0021] S2. Install the polytetrafluoroethylene ring into the inner wall of the sinking groove of the lower limit plate so that the polytetrafluoroethylene ring is completely wrapped by the sinking groove;

[0022] S3. Slightly tighten the upper mounting plate and the upper limit plate, the lower limit plate and the lower mounting plate by passing bolts through the screw holes respectively;

[0023] S4. Start to penetrate the steel wire rope from the cylindrical through hole on one side, and penetrate the upper and lower holes alternately. The upper limit mechanism and the lower limit mechanism clamp the steel wire rope to form a multi-turn spiral ring structure, ensuring that the formed single ring is approximately circular and has the same height; ensure that there is enough length for the locking assembly to lock the ends of the steel wire rope, and ensure that the limit column penetrates into the sink of the lower limit plate for a length h 2 ≥0.5mm;

[0024] S5. Tighten the wire rope with bolts and use a fixed-value feeler gauge to check that the clearance of the matching tolerance is not greater than 0.1mm. For any non-compliance, fine-tune the degree of tightening of the bolts; fix both ends of the wire rope 4 with locking components to prevent displacement.

[0025] Preferably, the flatness is measured using a three-coordinate measuring instrument.

[0026] Beneficial effects of the present invention:

[0027] (1) The steel column and the polytetrafluoroethylene ring are matched, and the steel column is used to move equally in its plane, and the vibration reduction and buffering performance of the polytetrafluoroethylene ring itself is used to effectively avoid collision between the structural parts in the horizontal directions; at the same time, there is a certain distance between the bottom surface of the steel column and the cylinder in the groove in the normal direction to ensure a certain amount of movement in the normal direction;

[0028] (2) The interface positions of the mounting plate and the device in the present invention are distributed around the wire rope, and no hole penetrates the middle of the wire rope, thereby avoiding interference with the wire rope;

[0029] (3) In the present invention, the contact area between the lower mounting plate and the equipment is increased to avoid misalignment of the two pairs of pressure plates, which would result in uneven force on the vibration isolator. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of a position limiting vibration isolation device provided in an embodiment of the present invention.

[0031] Figure 2 It is a top view of a position limiting vibration isolation device provided by an embodiment of the present invention.

[0032] Figure 3 3-1 is a cross-sectional view of a position limiting vibration isolation device provided in an embodiment of the present invention; 3-1 is a local enlarged view.

[0033] Figure 4It is a schematic diagram of an upper mounting plate in a position limiting vibration isolation device provided in an embodiment of the present invention.

[0034] Figure 5 It is a schematic diagram of a limiting upper plate in a limiting vibration isolation device provided in an embodiment of the present invention.

[0035] Reference numerals

[0036] 1. Upper mounting plate; 2. Limiting upper plate; 3. Locking buckle; 4. Steel wire rope; 5. Limiting lower plate; 6. Lower mounting plate; 7. Polytetrafluoroethylene ring; 8. Cylindrical through hole; 101. Mounting hole; 102. First screw hole; 103. First semicircular groove; 201. Second screw hole; 202. Second semicircular groove; 203. Limiting column; 204. Chamfer; 501. Sink; 601. Hole position. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0038] Example 1

[0039] The overall structure of a position limiting vibration isolation device provided in this embodiment is as follows Figure 1-5 As shown, it includes: an upper limit mechanism, a lower limit mechanism, a steel wire rope 4, and a locking assembly;

[0040] The upper limit mechanism comprises an upper mounting plate 1 and a limit upper plate 2;

[0041] A mounting hole 101 is provided at the center of the plane of the upper mounting plate 1 for installing bolts to fasten the limit vibration isolation device to other equipment; a plurality of first screw holes 102 are evenly distributed on both sides of the mounting hole 101, and a first semicircular groove 103 is provided on the bottom surface of the upper mounting plate 1 between every two first screw holes 102, so that the first screw holes 102 and the first semicircular groove 103 are avoided;

[0042] A plurality of second screw holes 201 are distributed on the plane of the limiting upper plate 2, and the positions of the second screw holes 201 and the first screw holes 102 correspond one by one, and are used to install bolts to fasten the upper mounting plate 1 and the limiting upper plate 2; a second semicircular groove 202 is opened on the upper surface of the limiting upper plate 2, and the second semicircular groove 202 corresponds to the position of the first semicircular groove 103 to form a cylindrical through hole 8 on the side of the upper limit mechanism, which is used to assemble the wire rope 4; the central protruding column structure on the lower bottom surface of the limiting upper plate 2 is the limiting column 203, and the lower edge of the limiting column 203 is an oblique chamfer 204, and its chamfer value is C0.5 (a 45-degree chamfer with a side length of 0.5 mm);

[0043] The lower limit mechanism includes a limit lower plate 5 and a lower mounting plate 6; the limit lower plate 5 is fixedly connected to the lower mounting plate 6, and the cross-sectional area of ​​the lower mounting plate 6 is larger than that of the limit lower plate 5;

[0044] A sink 501 is provided at the center of the limiting lower plate 5 for accommodating the limiting column 203; the depth of the sink is mainly affected by two factors, the main factor being the distance between the limiting column and the bottom surface, i.e., h 1 The height is usually set according to the parameters given in the outline (including the weight distance of the equipment). The secondary factor is the length of the limit column into the sink, that is, h 2 height; a polytetrafluoroethylene ring 7 is installed on the inner wall of the sink 501 to limit the mutual collision between the limit column 203 and the sink 501, which plays a role in shock absorption and buffering; there is a circle of depression at the bottom edge of the sink 501, which is used to embed the polytetrafluoroethylene ring 7 into the depression; a plurality of grooves are provided at corresponding positions on the lower bottom surface of the limit lower plate 5 and the upper surface of the lower mounting plate 6. After the limit lower plate 5 is fastened to the lower mounting plate 6, a lower limit mechanism is formed, and the cylindrical through hole 8 on its side is used to assemble the wire rope 4; the length h of the limit column 203 penetrating into the interior of the sink 501 2 ≥0.5mm, the limit column 203 is stuck in the sink 501 to limit the left and right and up and down movement of the structural parts connected to the device, ensuring that the structural parts do not collide with each other;

[0045] Holes 601 are provided on the four edges of the lower mounting plate 6 for installing bolts to fasten the limit vibration isolation device to other equipment;

[0046] The upper limit mechanism and the lower limit mechanism are connected by a steel wire rope 4, which penetrates the steel wire rope 4 from the cylindrical through hole 8 of the upper limit mechanism on one side, and the holes are alternated up and down to form a symmetrical structure. The upper limit mechanism and the lower limit mechanism clamp the steel wire rope 4 to form a symmetrical multi-turn spiral ring structure, and pass through the cylindrical through hole 8 of the upper limit mechanism on the other side. The two ends of the steel wire rope 4 are fixed with locking components to prevent displacement; the symmetrical multi-turn spiral ring structure of the steel wire rope 4 eliminates the stress between the axial directions and prevents the vibration isolator from tilting along one side;

[0047] The locking assembly is two lock buckles 3, which respectively lock the two ends of the steel wire rope 4;

[0048] The material of the steel wire rope 4 is stainless steel wire;

[0049] The working principle of the limit vibration isolation device of the present invention is: the deformation is generated by the stretching and compression of the wire rope, and the wire rope causes dry friction at the same time, and the reaction force is generated by the change of its spiral structure to achieve a shock-absorbing effect on the load, thereby avoiding damage to the equipment due to huge impact force; the limit can limit the movement range of the load, and it limits the displacement of the equipment by the movement distance of the limit column in the groove, effectively solving the interference problem of the equipment.

[0050] Example 2

[0051] The limit vibration isolation device provided in this embodiment starts to penetrate the wire rope 4 from the cylindrical through hole 8 of the lower limit mechanism on one side and comes out from the cylindrical through hole 8 of the lower limit mechanism on the other side; the rest of the structure is the same as that of Embodiment 1.

[0052] Example 3

[0053] A method for installing a limit vibration isolation device specifically comprises the following steps:

[0054] S1. Grind and correct each component before installation to ensure its flatness; and the flatness is measured with a three-coordinate instrument;

[0055] S2. Clean the concave part of the lower limit plate. Figure 3 As shown in B in the figure); install the polytetrafluoroethylene ring into the inner wall of the sinking groove of the limit lower plate so that the polytetrafluoroethylene ring is completely wrapped by the sinking groove; the outer diameter of the polytetrafluoroethylene ring and the inner diameter of the sinking groove of the limit lower plate must have a certain dimensional tolerance;

[0056] S3. Slightly tighten the upper mounting plate and the upper limit plate, the lower limit plate and the lower mounting plate by passing bolts through the screw holes respectively;

[0057] S4. Start to penetrate the steel wire rope from the cylindrical through hole on one side, and penetrate the upper and lower holes alternately. The upper limit mechanism and the lower limit mechanism clamp the steel wire rope to form a symmetrical multi-turn spiral ring structure, ensuring that the formed single ring is approximately circular and has the same height; ensure that there is enough length for the locking assembly to lock at both ends of the steel wire rope, and ensure that the limit column penetrates into the sinking groove of the lower limit plate for a length h 2 ≥0.5mm;

[0058] S5. Tighten the wire rope with bolts and use a fixed-value feeler gauge to check that the clearance of the matching tolerance is not greater than 0.1mm. For any non-compliance, fine-tune the degree of tightening of the bolts; fix both ends of the wire rope 4 with locking components to prevent displacement.

[0059] During installation, the overall length of the wire rope is adjusted to complete the overall shape. The installation effect is as follows: Figure 1 As shown; when in use, it is fixedly connected to other equipment through the mounting holes of the upper mounting plate and the holes of the lower mounting plate.

[0060] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0061] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A limit vibration isolation device, characterized in that: It includes an upper limit mechanism, a lower limit mechanism, a steel wire rope, and a locking assembly; the upper limit mechanism and the lower limit mechanism are connected by a steel wire rope, and the upper limit mechanism and the lower limit mechanism clamp the steel wire rope to form a multi-turn spiral ring structure; both ends of the steel wire rope are fixed by a locking assembly; The upper limit mechanism comprises an upper mounting plate and an upper limit plate; A mounting hole is provided at the center of the plane of the upper mounting plate, which is used to install bolts to fasten the limit vibration isolation device to other equipment; a plurality of first screw holes are evenly distributed on both sides of the mounting hole; and a plurality of first semicircular grooves are provided on the bottom surface of the upper mounting plate at positions between every two first screw holes; The upper limit plate is provided with a plurality of second screw holes, which correspond to the positions of the first screw holes one by one and are used to install bolts to fasten the upper mounting plate and the upper limit plate; the upper surface of the upper limit plate is provided with a plurality of second semicircular grooves; the positions of the second semicircular grooves correspond to the positions of the first semicircular grooves, forming a cylindrical through hole for assembling a steel wire rope; the center of the lower bottom surface of the upper limit plate has a raised columnar structure, which is a limit column; The lower limit mechanism comprises a limit lower plate and a lower mounting plate; the limit lower plate is fixedly connected to the lower mounting plate, and the cross-sectional area of ​​the lower mounting plate is larger than that of the limit lower plate; A sink groove is provided at the center of the limit lower plate for accommodating the limit column; the limit column goes deep into the sink groove; a polytetrafluoroethylene ring is installed on the inner wall of the sink groove to limit the mutual collision between the limit column and the sink groove; a plurality of semicircular grooves are provided at corresponding positions on the lower bottom surface of the limit lower plate and the upper surface of the lower mounting plate, and a lower limit mechanism is formed when the limit lower plate is fastened to the lower mounting plate, and the cylindrical through hole on the side is used to assemble the wire rope; The lower mounting plate is provided with holes for installing bolts to fasten the position limiting vibration isolation device to other equipment.

2. A position limiting vibration isolation device according to claim 1, characterized in that: The lower edge of the limiting column is an oblique chamfer, and the chamfer value is C0.

5.

3. A position limiting vibration isolation device according to claim 2, characterized in that: The limiting column is a cylinder, and the sink is a cylindrical groove.

4. A position limiting vibration isolation device according to claim 3, characterized in that: The multi-turn spiral ring structure is an axisymmetric multi-turn spiral ring structure with the limiting column as the symmetry axis.

5. A position limiting vibration isolation device according to claim 4, characterized in that: The length h2 of the limiting column penetrating into the interior of the sink is ≥0.5mm.

6. A position limiting vibration isolation device according to claim 5, characterized in that: The steel wire rope is made of stainless steel wire.

7. A position limiting vibration isolation device according to claim 6, characterized in that: The bottom edge of the sink groove of the limiting lower plate is provided with a circle of depression, which is used to embed the bottom of the polytetrafluoroethylene ring into the depression.

8. The installation method of the position limiting vibration isolation device according to claim 1, characterized in that: The steps include: S1. Grind and correct each component before installation to ensure flatness; S2. Install the polytetrafluoroethylene ring into the inner wall of the sinking groove of the lower limit plate so that the polytetrafluoroethylene ring is completely wrapped by the sinking groove; S3. Slightly tighten the upper mounting plate and the upper limit plate, the lower limit plate and the lower mounting plate by passing bolts through the screw holes respectively; S4. Start to penetrate the steel wire rope from the cylindrical through hole on one side, and penetrate the upper and lower holes alternately. The upper limit mechanism and the lower limit mechanism clamp the steel wire rope to form a multi-turn spiral ring structure, ensuring that the formed single ring is approximately circular and has the same height; ensure that there is enough length for the locking assembly to lock the two ends of the steel wire rope, and ensure that the length h2 of the limit column penetrating into the sink groove of the lower limit plate is ≥0.5mm; S5. Tighten the wire rope with bolts and use a fixed-value feeler gauge to check that the clearance of the matching tolerance is not greater than 0.1mm. For any non-compliance, fine-tune the tightening degree of the bolts; fix both ends of the wire rope with locking components to prevent displacement.

9. The installation method according to claim 8, characterized in that: The flatness is measured using a three-coordinate instrument.

Images