High-speed main shaft vibration suppression device and method based on energy absorption

Abstract

The invention discloses a high-speed main shaft vibration suppression device and method based on energy absorption, and relates to the technical field of high-speed shaft vibration reduction, the high-speed main shaft comprises a high-speed shaft, and the high-speed shaft extends outwards in the radial direction to form a vibration reduction disc; the two annular discs sleeve the left side and the right side of the damping disc in the axial direction of the high-speed shaft, annular damping fins are embedded in the sides, close to the damping disc, of the annular discs, the annular damping fins correspond to the damping disc and are made of magnetic materials, and the annular discs are connected with the fixing base. When the high-speed shaft generates axial vibration, a magnetic field is generated through the annular damping fins made of magnetic materials on the two sides of the high-speed shaft, and the magnetic field generates axial damping force on the high-speed shaft; when the high-speed shaft generates radial vibration, radial damping force is generated on the high-speed shaft through the damping grease filled in the high-speed shaft; compared with the prior art, the magnetic field for vibration reduction and the damping grease are not in direct contact with the high-speed shaft, and assembly errors, abrasion and the like caused by contact of the vibration reduction device and the high-speed shaft can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed shaft vibration reduction, and in particular to a high-speed main shaft vibration reduction device and method based on energy absorption. Background Art

[0002] High-speed shafts are mechanical structures used to transmit power and motion in mechanical equipment. They have the advantages of high efficiency, stability, low noise, and high precision. They are currently widely used in CNC machine tools, wind power equipment, aerospace, electronic semiconductor manufacturing, medical technology, robotics and other fields. As equipment manufacturing requirements continue to increase, the vibration resistance requirements for high-speed shafts are also getting higher and higher.

[0003] Existing high-speed shaft vibration reduction mostly adopts passive vibration reduction technology. The vibration reduction device needs to contact with the shaft to achieve the vibration reduction function by reducing or consuming the vibration energy. On the one hand, the contact between the vibration reduction device and the shaft will cause assembly errors, which will affect the transmission of the shaft; on the other hand, it will also cause wear on the shaft.

[0004] In view of this, how to provide a vibration suppression device that does not contact the high-speed shaft is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a high-speed spindle vibration suppression device and method based on energy absorption to solve the problems existing in the prior art.

[0006] To achieve the above object, the present invention provides a high-speed spindle vibration suppression device based on energy absorption, comprising:

[0007] A high-speed shaft, the high-speed shaft extending radially outward to form a vibration damping disk;

[0008] Two annular disks are axially sleeved on the left and right sides of the damping disk along the high-speed shaft, an annular damping sheet is embedded on one side of the annular disk close to the damping disk, the annular damping sheet corresponds to the damping disk and is made of magnetic material, the two annular disks are fixedly connected, the annular damping sheet is used to form a magnetic field and the damping disk is located in the magnetic field;

[0009] A fixing seat, the annular disk is connected to the fixing seat;

[0010] When the high-speed shaft generates axial vibration, the magnetic field can generate a damping force on the high-speed shaft along the axial direction of the high-speed shaft.

[0011] Furthermore, a side of the annular disk close to the shock absorbing disk is recessed inward to form an installation cavity, and the annular damping plate is embedded in the installation cavity and sleeved on the high-speed shaft.

[0012] Furthermore, the two annular disks are connected by a first bolt.

[0013] Furthermore, the annular disk is connected to the base through a second bolt and a nut, and the connection point is close to the bottom of the annular disk.

[0014] Furthermore, a mounting hole is opened inwardly along the axial direction of the high-speed shaft at one end of the high-speed shaft, and the mounting hole is a non-through hole. The mounting hole is filled with damping grease, and the mounting hole is sealed by a plastic bolt; when the high-speed shaft generates radial vibration, the damping grease can generate radial damping force on the high-speed shaft.

[0015] Furthermore, a plastic gasket is provided between the plastic bolt and the mounting hole.

[0016] The present invention also provides a method for suppressing vibration of a high-speed spindle based on energy absorption, and the method for suppressing vibration of a high-speed spindle based on energy absorption is applied, comprising the following steps:

[0017] When the high-speed shaft vibrates axially, a magnetic field is generated through the annular damping plates made of magnetic material on both sides of the high-speed shaft, and the magnetic field generates an axial damping force on the high-speed shaft;

[0018] When the high-speed shaft generates radial vibration, the damping grease filled inside the high-speed shaft generates radial damping force on the high-speed shaft.

[0019] The present invention discloses the following technical effects:

[0020] When the high-speed shaft generates axial vibration, a magnetic field is generated by the annular damping plates made of magnetic material on both sides of the high-speed shaft, and the magnetic field generates an axial damping force on the high-speed shaft; when the high-speed shaft generates radial vibration, a radial damping force is generated on the high-speed shaft through the damping grease filled inside the high-speed shaft; compared with the existing technology, the magnetic field and damping grease used for vibration reduction are not in direct contact with the high-speed shaft (not connected to the outside of the high-speed shaft), which can avoid assembly errors and wear caused by the contact between the shock absorbing device and the high-speed shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the present invention from another perspective;

[0024] Figure 3 It is a schematic diagram of the assembly of the shock absorbing plate and the annular damping plate;

[0025] Figure 4 It is a schematic diagram of the annular disk structure;

[0026] Figure 5 It is a schematic diagram of the high-speed shaft structure;

[0027] Figure 6 This is the exploded diagram of the high-speed shaft structure;

[0028] Figure 7 It is the cross-sectional view of the high-speed shaft;

[0029] Among them, 1. high-speed shaft; 101. vibration damping plate; 102. mounting hole; 2. annular plate; 201. mounting cavity; 3. annular damping plate; 4. fixing seat; 5. first bolt; 6. second bolt; 7. plastic bolt; 8. plastic gasket. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] The embodiment of the present invention provides a high-speed main shaft vibration suppression device based on energy absorption, comprising: a high-speed shaft 1, both ends of the high-speed shaft 1 are connected and fixed to an external mechanical structure (the external mechanical structure is an existing structure, not shown in the figure), the middle part of the high-speed shaft 1 extends radially outward to form a vibration damping disk 101, the vibration damping disk 101 is a circular disk and is coaxial with the high-speed shaft 1, and its outer diameter is roughly twice that of the high-speed shaft 1; two annular disks 2 are sleeved on the left and right sides of the vibration damping disk 101 along the axial direction of the high-speed shaft 1, and the middle part of the annular disk 2 is provided with a sleeve hole with an aperture larger than the outer diameter of the high-speed shaft 1, and an annular damping plate 3 is embedded on the side of the annular disk 2 close to the vibration damping disk 101, and the annular damping plate 3 corresponds to the vibration damping disk 101 and is made of magnetic material, and a magnet is specifically used in this embodiment. The annular damping plate 3 is close to the vibration damping disk 101, but a certain gap is left between the annular damping plate 3 and the vibration damping disk 101. The two annular disks 2 are connected to each other on one side close to the vibration damping disk 101, the vibration damping disk 101 and the annular damping plate 3 are wrapped inside the two annular disks 2, the annular damping plate 3 is used to form a magnetic field and the vibration damping disk 101 is located in the magnetic field, and the annular disks 2 are connected to the fixed seat 4; when the high-speed shaft 1 generates axial vibration, the magnetic field can generate a damping force on the high-speed shaft 1 along the axial direction of the high-speed shaft 1.

[0033] In this embodiment, the side of the annular disk 2 close to the vibration damping disk 101 is recessed inward to form an installation cavity 201, the annular damping plate 3 is embedded in the installation cavity 201 and sleeved on the high-speed shaft 1, and the middle part of the annular damping plate 3 is also provided with a sleeve hole with a hole diameter larger than the outer diameter of the high-speed shaft 1.

[0034] In this embodiment, two annular disks 2 are provided with a screw hole on the left and right sides of the sleeve hole, and the two annular disks 2 are connected by a first bolt 5 .

[0035] In this embodiment, the base has two connecting ears. After the two annular disks 2 are fixed, they are placed in the gap between the two connecting ears. Two screw holes are arranged below the sleeve holes of the annular disks 2. The annular disks 2 are connected to the two connecting ears of the base through second bolts 6 (stud bolts) and nuts.

[0036] In this embodiment, a long straight mounting hole 102 is opened inward along the axial direction of the high-speed shaft 1 at one end of the high-speed shaft 1. The mounting hole 102 is a non-through hole. The mounting hole 102 is filled with damping grease. The mounting hole 102 is blocked by a plastic bolt 7. When the high-speed shaft 1 generates radial vibration, the damping grease can generate radial damping force on the high-speed shaft 1. A plastic gasket 8 is arranged between the plastic bolt 7 and the mounting hole 102.

[0037] The embodiment of the present invention further provides a method for suppressing vibration of a high-speed spindle based on energy absorption, and the method uses a device for suppressing vibration of a high-speed spindle based on energy absorption, and comprises the following steps:

[0038] When the high-speed shaft 1 generates axial vibration, a magnetic field is generated through the annular damping plates 3 made of magnetic material on both sides of the high-speed shaft 1, and the magnetic field generates an axial damping force on the high-speed shaft 1;

[0039] When the high-speed shaft 1 generates radial vibration, the damping grease filled inside the high-speed shaft 1 generates radial damping force on the high-speed shaft 1 .

[0040] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A high-speed spindle vibration suppression device based on energy absorption, characterized in that: include: A high-speed shaft (1), the high-speed shaft (1) extending radially outward to form a vibration damping plate (101); Two annular disks (2) are axially sleeved on the left and right sides of the vibration damping disk (101) along the high-speed shaft (1); an annular damping sheet (3) is embedded on one side of the annular disk (2) close to the vibration damping disk (101); the annular damping sheet (3) corresponds to the vibration damping disk (101) and is made of magnetic material; the two annular disks (2) are fixedly connected; the annular damping sheet (3) is used to form a magnetic field and the vibration damping disk (101) is located in the magnetic field; A fixing seat (4), the annular disk (2) being connected to the fixing seat (4); When the high-speed shaft (1) generates axial vibration, the magnetic field can generate a damping force on the high-speed shaft (1) along the axial direction of the high-speed shaft (1).

2. The high-speed spindle vibration suppression device based on energy absorption according to claim 1 is characterized in that: The side of the annular disk (2) close to the vibration damping disk (101) is recessed inward to form a mounting cavity (201), and the annular damping plate (3) is embedded in the mounting cavity (201) and sleeved on the high-speed shaft (1).

3. The high-speed spindle vibration suppression device based on energy absorption according to claim 1, characterized in that: The two annular disks (2) are connected via a first bolt (5).

4. The high-speed spindle vibration suppression device based on energy absorption according to claim 1, characterized in that: The annular disk (2) is connected to the base via a second bolt (6) and a nut, and the connection point is close to the bottom of the annular disk (2).

5. A high-speed spindle vibration suppression device based on energy absorption according to any one of claims 1 to 4, characterized in that: One end of the high-speed shaft (1) is provided with a mounting hole (102) inwardly along the axial direction of the high-speed shaft (1); the mounting hole (102) is a non-through hole; the mounting hole (102) is filled with damping grease; the mounting hole (102) is sealed by a plastic bolt (7); when the high-speed shaft (1) generates radial vibration, the damping grease can generate radial damping force on the high-speed shaft (1).

6. The high-speed spindle vibration suppression device based on energy absorption according to claim 5, characterized in that: A plastic gasket (8) is provided between the plastic bolt (7) and the mounting hole (102).

7. A method for suppressing vibration of a high-speed spindle based on energy absorption, characterized in that: The high-speed spindle vibration suppression device based on energy absorption described in claim 5 or claim 6 comprises the following steps: When the high-speed shaft (1) generates axial vibration, a magnetic field is generated through the annular damping plates (3) made of magnetic material on both sides of the high-speed shaft (1), and the magnetic field generates an axial damping force on the high-speed shaft (1); When the high-speed shaft (1) generates radial vibration, the damping grease filled inside the high-speed shaft (1) generates radial damping force on the high-speed shaft (1).

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