A three-dimensional frequency-adjustable NiTi serpentine spring / metal wire mesh composite bearing

Abstract

The present application relates to a kind of NiTi serpentine spring piece / wire mesh composite bearing that can be three-way frequency modulation, both NiTi memory alloy wire is made into tubular wire mesh structure, wire mesh structure is bent into circular ring and adds heating resistance wire at its center, serpentine spring piece in external tooling is made of NiTi memory alloy, then wire mesh structure is integrated into tooling, using the characteristics that the stiffness and damping of NiTi memory alloy will change with temperature change under temperature change, realize the temperature control adjustment of the stiffness and damping of the present composite bearing, meet the requirements of variable stiffness and variable damping under different working conditions. The rod body of the prepared wire mesh structure is bent into circular ring, so that the wire mesh structure can simultaneously bear axial and two-way radial load. The composite bearing device designed by the present application has compact structure, three-way damping, temperature-controlled adjustable damping, is easy to process and form, has high forming quality and good fatigue strength.

Description

Technical Field

[0001] The invention relates to the technical field of composite bearings, in particular to a NiTi serpentine reed / wire mesh composite bearing capable of three-way frequency modulation. Background Art

[0002] The main problems and defects of existing composite bearing vibration reduction are:

[0003] 1) Currently, the wire mesh structures in composite bearings with wire mesh composite structures are mostly made of stainless steel wire, and their stiffness and damping are not adjustable, resulting in only passive vibration reduction. To meet different operating conditions, the wire mesh structure must be replaced with the one with the appropriate damping and stiffness, which is very inconvenient. The rotor bearing in the present invention, which combines a NiTi shape memory alloy wire mesh structure with a NiTi serpentine spring, can adjust its stiffness and damping through temperature control to meet varying operating conditions, achieving active vibration reduction.

[0004] 2) The latest NiTi shape memory alloy wire mesh structure variable damping method is to evenly add insulated remote heating resistor wire to the initial wire mesh blank during stamping. By energizing the resistor wire to generate heat, the stiffness and damping of the wire mesh structure are adjusted. However, the stamping process can cause the heating resistor wire to break to a certain extent, thus failing to achieve the desired heating effect and losing the original temperature control properties. The addition of the heating wire also significantly reduces the molding quality of the metal rubber.

[0005] 3) The traditional wire mesh structure is made of stamped metal wire, so the three-dimensional stiffness is unequal, which cannot meet the three-dimensional equal stiffness requirements under complex working conditions. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a NiTi serpentine reed / wire mesh composite bearing with three-way frequency modulation. Only a simple structural transformation is used to enable the composite bearing to have three-way stiffness damping, so that the composite bearing has the characteristics of compact structure, three-way damping, adjustable damping temperature control, easy processing and forming, high molding quality, and good fatigue strength.

[0007] To achieve the above object, the present invention adopts the following technical solution: a NiTi serpentine reed / wire mesh composite bearing capable of three-way frequency modulation, which comprises, in sequence, a left outer shell of the composite bearing, a left NiTi serpentine reed, a left inner shell of the rotor bearing, a NiTi wire mesh structure, a heating resistor wire, an outer NiTi serpentine reed, an inner NiTi serpentine reed, a right inner shell of the composite bearing, a right NiTi serpentine reed, and a right outer shell of the composite bearing;

[0008] Insert the heating resistance wire into the through hole reserved in the NiTi metal mesh structure ring; match the NiTi metal mesh structure ring with the heating resistance wire with the left inner shell of the composite bearing; connect the right surface of the matched left inner shell of the composite bearing and the upper left surface of the right inner shell of the composite bearing by welding; connect the outer surface of the left inner shell of the composite bearing and the inner surface of the left outer shell of the composite bearing by welding; connect the outer surface of the right inner shell of the composite bearing and the inner surface of the right outer shell of the composite bearing by welding; connect the outer surface of the right inner shell of the composite bearing and the inner surface of the right outer shell of the composite bearing by welding; finally, connect the right surface of the left outer shell of the composite bearing and the left surface of the right outer shell of the composite bearing by welding.

[0009] In a preferred embodiment, the NiTi wire mesh structure ring includes a NiTi wire mesh structure blank, a metal rod, a pressing block, an upper block, a sleeve and a lower block in sequence; first, the NiTi wire blank is evenly wound on the metal rod at 45°; then the wound blank is placed in the sleeve, and the two ends are blocked by the upper block and the lower block; next, the pressing block is placed on the upper baffle, and the press applies pressure on the upper end of the pressing block; then the formed NiTi wire mesh structure rod is taken out and bent into a NiTi wire mesh structure ring.

[0010] In a preferred embodiment, first, the composite bearing is tightly connected according to the connection method described above, the composite bearing is connected to the rotating shaft, and then the host computer, NI acquisition card, solid-state relay, heating resistor and temperature sensor are connected in sequence; during the working process, the temperature needs to be quickly increased. First, the host computer sets the required temperature and sends an instruction to the NI acquisition card. The NI acquisition card then sends a signal to the solid-state relay, the solid-state relay sends a signal to the heating resistor, and the heating resistor sends a heating signal to the composite bearing. The temperature signal of the composite bearing is collected through the temperature sensor. Finally, the temperature sensor transmits the resistance voltage signal to the NI acquisition card, and the NI acquisition card then transmits the temperature signal to the host computer.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1) Design of NiTi serpentine reed / wire mesh composite bearing structure with three-way frequency modulation

[0013] The composite bearing's structure is rationally designed, integrating three-dimensional vibration damping with stable temperature control. The wire mesh structure is wound into a cylindrical structure with fine through-holes and bent into a ring shape to withstand three-dimensional loads. The placement of the heating resistor wire is strategically designed to prevent the wire from breaking during the forming process. A serpentine reed structure constructed from NiTi shape memory alloy increases the adjustable range of frequency damping. Appropriate rigid connections ensure the stability of all components of the composite bearing during operation.

[0014] 2) NiTi serpentine reed / wire mesh composite bearing heating method with three-way frequency modulation

[0015] The present invention uses an insulated heating wire to achieve the heating function. By placing the heating wire into the prepared NiTi metal mesh structure, the NiTi metal mesh structure and NiTi serpentine reed in the composite bearing can be heated, completing the phase transformation between martensite and austenite, thereby achieving the purpose of adjusting the damping strength of the composite bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Figure 1 is a diagram of the preparation process of the NiTi metal mesh structure ring;

[0017] Figure 2 This is the overall structural appearance of a NiTi serpentine reed / wire mesh composite capable of three-way frequency modulation;

[0018] Figure 3 A schematic diagram of a NiTi snake-shaped reed / wire mesh composite explosion capable of three-way frequency modulation;

[0019] Figure 4 A working diagram of a NiTi serpentine reed / wire mesh composite capable of three-way frequency modulation;

[0020] Figure 5 A partial installation diagram of a NiTi serpentine reed / wire mesh composite capable of three-way frequency modulation;

[0021] Figure 6 Schematic diagram of the working process of the NiTi serpentine reed / wire mesh composite with three-way frequency modulation. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form, and it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0025] refer to Figure 1-6 The three-way frequency-modulated NiTi serpentine reed / wire mesh composite includes, in sequence, the left outer shell of the rotor bearing, the left NiTi serpentine reed, the left inner shell of the composite bearing, the NiTi wire mesh structural ring, the heating resistor wire, the outer NiTi serpentine reed, the inner NiTi serpentine reed, the right inner shell of the composite bearing, the right NiTi serpentine reed and the right outer shell of the rotor bearing.

[0026] Preparation process of NiTi wire mesh structure:

[0027] The preparation process of NiTi wire mesh structure ring is as follows Figure 1 As shown; from left to right: NiTi wire mesh blank 1, metal rod 2, pressing block 3, upper stopper 4, sleeve 5, lower stopper 6, NiTi wire mesh structural rod 7, NiTi wire mesh structural ring 8.

[0028] Preparation process: First, the NiTi metal mesh structure blank 1 is evenly wound on the metal rod 2 at 45°; then the wound blank is placed in the sleeve 5, and the two ends are blocked with upper and lower blocks 4 and 6; next, the pressing block 3 is placed on the upper baffle 4, and the press applies pressure on the upper end of the pressing block 3; then the formed NiTi metal mesh structure 7 is taken out and bent into a NiTi metal mesh structure ring.

[0029] The present invention is a NiTi serpentine reed / wire mesh composite capable of three-way frequency modulation. The main part of the present invention is the structural design of the composite bearing, the detailed information of which is as follows:

[0030] Three-way frequency-tunable NiTi serpentine reed / wire mesh composite structure design:

[0031] The appearance of the NiTi serpentine reed / wire mesh composite structure with three-way frequency modulation is shown in the figure below. Figure 2 As shown; the specific structural explosion diagram is as follows Figure 3 As shown, from left to right are: left outer shell 9 of composite bearing, left NiTi serpentine reed 10, left inner shell 11 of composite bearing, NiTi wire mesh structure ring 12, heating resistance wire 13, outer NiTi serpentine reed 14, inner NiTi serpentine reed 15, right inner shell 16 of composite bearing, right NiTi serpentine reed 17, and right outer shell 18 of composite bearing.

[0032] Connection method: insert the heating resistance wire 13 into the reserved through hole of the NiTi metal mesh structure ring 12; match the NiTi metal mesh structure ring 12 with the heating resistance wire 13 with the left inner shell 11 of the composite bearing; connect the right surface of the matched left inner shell 11 of the composite bearing and the upper left surface of the right inner shell 16 of the composite bearing by welding with the inner NiTi serpentine reed 15; connect the outer surface of the left inner shell 11 of the composite bearing and the inner surface of the left outer shell 9 of the rotor bearing by welding with the left NiTi serpentine reed 10; connect the outer surface of the right inner shell 15 of the composite bearing and the inner surface of the right outer shell 18 of the composite bearing by welding with the right NiTi serpentine reed 17; finally, connect the right surface of the left outer shell 9 of the rotor bearing and the left surface of the right outer shell 18 of the composite bearing by welding with the outer NiTi serpentine reed 14.

[0033] Three-way frequency-adjustable NiTi serpentine reed / wire mesh composite working scene design:

[0034] The working scene of the NiTi snake-shaped reed / wire mesh composite with three-way frequency modulation is shown in the figure. Figure 4 Shown are: a workbench 19, a motor platform 20, a motor 21, a right rigid base 22, a rotating shaft 23, a counterweight 24, and a left rigid base 25.

[0035] The partial installation diagram of the NiTi serpentine reed / wire mesh composite with three-way frequency modulation is as follows Figure 5 Shown: left rigid pedestal 26, right composite bearing cover 27, left composite bearing cover 28, bearing 29, composite bearing 30.

[0036] Connection method: Place the right rotor bearing cover 27 into the left rigid pedestal 26, then place the rotor bearing 30 into the right composite bearing cover 27, place the bearing 29 into the composite bearing 30, and then fix the left composite bearing cover 28 to the left rigid pedestal 26 by bolting.

[0037] Before using this composite bearing, first, connect the composite bearing tightly according to the connection method described above, connect the composite bearing to the rotating shaft, and then connect the host computer, NI acquisition card, solid-state relay, heating resistor wire and temperature sensor in sequence. Figure 6 As shown in the figure, during the working process, the temperature needs to be increased quickly. First, the host computer sets the required temperature and then sends a command to the NI acquisition card. The NI acquisition card then sends a signal to the solid-state relay. The solid-state relay then sends a signal to the heating resistor wire. The heating resistor wire then sends a heating signal to the composite bearing. The temperature signal of the composite bearing is collected through the temperature sensor. Finally, the temperature sensor transmits the resistance voltage signal to the NI acquisition card, and the NI acquisition card then transmits the temperature signal to the host computer.

[0038] The present invention realizes stable temperature regulation of the NiTi composite bearing by rationally placing the heating wire position and designing the NiTi metal wire mesh structure, thereby achieving the effect of stably regulating the frequency damping and stiffness of the rotor bearing.

[0039] The composite bearing designed in the present invention can combine temperature control and three-way vibration reduction, and can be expanded to be used as a vibration reduction device in working scenarios where the rotor system has special requirements such as frequency conversion, variable damping, and three-way vibration reduction in industries such as automobiles, rolling mills, mining, metallurgy, and plastic machinery.

[0040] Design of NiTi serpentine reed / wire mesh composite structure with three-way frequency modulation

[0041] The composite bearing's structure is rationally designed, integrating three-dimensional vibration damping with stable temperature control. The wire mesh structure is wound into a cylindrical structure with fine through-holes and bent into a ring shape to withstand three-dimensional loads. The placement of the heating resistor wire is strategically designed to prevent the wire from breaking during the forming process. A serpentine reed structure constructed from NiTi shape memory alloy increases the adjustable range of frequency damping. Appropriate rigid connections ensure the stability of all components of the composite bearing during operation.

[0042] NiTi serpentine reed / wire mesh composite heating method with three-way frequency modulation

[0043] The present invention uses an insulated heating wire to achieve the heating function. By placing the heating wire into a prepared NiTi wire mesh structure, the NiTi wire mesh structure and NiTi serpentine reed in the rotor bearing are heated, completing the phase transition between martensite and austenite, thereby adjusting the damping strength of the composite bearing.

[0044] In summary, the heating method of placing the heating wire inside the metal wire mesh structure can quickly change the damping of the composite bearing, and has a simple structure and reliable operation.

[0045] Through the aforementioned working process, the present invention can quickly and reliably adjust the temperature around the wire mesh structure vibration damping element and the NiTi serpentine reed in the composite bearing while the composite bearing is operating, effectively changing the damping and stiffness of the composite bearing through temperature control. With a simple structure, the NiTi composite bearing achieves efficient temperature control during operation, achieving variable stiffness and damping, and expanding the composite bearing's application scenarios.

Claims

1. A three-way frequency-modulated NiTi serpentine reed and wire mesh composite bearing, characterized in that: It includes, in sequence, a left outer shell of the composite bearing, a left NiTi serpentine reed, a left inner shell of the composite bearing, a NiTi wire mesh ring, a heating resistance wire, an outer NiTi serpentine reed, an inner NiTi serpentine reed, a right inner shell of the composite bearing, a right NiTi serpentine reed, and a right outer shell of the composite bearing; Insert the heating resistance wire into the through hole reserved by the NiTi wire mesh ring; match the NiTi wire mesh ring with the heating resistance wire with the left inner shell of the composite bearing; connect the right surface of the matched left inner shell of the composite bearing to the upper left surface of the right inner shell of the composite bearing through the inner NiTi serpentine reed by welding; connect the outer surface of the left inner shell of the composite bearing to the inner surface of the left outer shell of the composite bearing through the left NiTi serpentine reed by welding; connect the outer surface of the right inner shell of the composite bearing to the inner surface of the right outer shell of the composite bearing through the right NiTi serpentine reed by welding; finally, connect the right surface of the left outer shell of the rotor bearing to the left surface of the right outer shell of the composite bearing through the outer NiTi serpentine reed by welding; The NiTi wire mesh ring is prepared from a NiTi wire mesh blank, a metal rod, a pressing block, an upper block, a sleeve, and a lower block. First, the NiTi wire mesh blank is evenly wound on the metal rod at a 45-degree angle. Then, the wound blank is placed in the sleeve, and both ends are blocked by the upper block and the lower block. Next, the pressing block is placed on the upper block, and a press is used to apply pressure on the upper end of the pressing block. Then, the formed NiTi wire mesh rod is taken out and bent into the NiTi wire mesh ring.

2. A three-way frequency-adjustable NiTi serpentine reed and wire mesh composite bearing according to claim 1, characterized in that: First, tightly connect the composite bearing according to the connection method described above, connect the composite bearing to the rotating shaft, and then connect the host computer, NI acquisition card, solid-state relay, heating resistor wire and temperature sensor in sequence; during operation, the temperature needs to be increased quickly. First, the host computer sets the required temperature and sends a command to the NI acquisition card. The NI acquisition card then sends a signal to the solid-state relay, the solid-state relay sends a signal to the heating resistor wire, and the heating resistor wire sends a heating signal to the composite bearing. The temperature signal of the composite bearing is collected through the temperature sensor. Finally, the temperature sensor transmits the resistance voltage signal to the NI acquisition card, and the NI acquisition card then transmits the temperature signal to the host computer.

Images