# US 2017/0288520 A1 · Wide-frequency-band large displacement angle shaker > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288520 A1 - Document ID: US20170288520A1 - Status: Published application - Kind: A1 - Application number: 15/508,337 - Filed: 2015-07-03 - Published: 2017-10-05 - Earliest claimed: 2014-09-02 - Assignees: Zhejiang University - Applicants: Zhejiang University - Inventors: Wen He; Bo Tang; JinLin Li; ShuShi Jia; Jie Zhou - Web page: https://patentgrep.com/patent/US20170288520A1 ## CPC - H02K 33/00: Motors with reciprocating, oscillating or vibrating magnet, armature or coil system (arrangements for handling mechanical energy structurally associated with motors H02K7/00, e.g. H02K7/06) - B06B 1/045: {using vibrating magnet, armature or coil system} - G01D 18/00: Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00 - H02K 1/34: Reciprocating, oscillating or vibrating parts of the magnetic circuit - B06B 2201/53: with vibrating magnet or coil - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R) - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR ## Abstract Provided is a broadband and large displacement angular vibrator, comprising an outer housing, a vibration table, a main spindle, a moving coil assembly, a magnetic circuit assembly, a holding brake assembly, a motor and closed loop control assembly thereof, an electric viscoelastic feedback control assembly, an air bearing, and an angular displacement sensor; the moving coil comprises a moving coil substrate and a coil; the moving coil substrate is fixed to the main spindle; the magnetic circuit assembly comprises a magnetic ring, a central magnetic pole, and magnets; the magnetic ring, central magnetic pole, magnets, and air gap form a closed magnetic circuit; the central magnetic pole is located inside the magnetic ring, the magnets are located between the magnetic ring and the central magnetic pole, and the magnets are attached to the central magnetic pole; the outer housing has the holding brake assembly; the holding brake assembly comprises a brake lining, an oil distribution sleeve, and an oil reservoir having a piston; the brake lining and the oil distribution sleeve enclose a hydraulic oil chamber; when the hydraulic oil is pressed into the hydraulic oil chamber from the oil reservoir, the magnetic circuit assembly brakes; when the hydraulic oil flows back to the oil reservoir, the magnetic circuit assembly rotates with the motor rotor. The present angular shaker has the advantage of being able to switch between intermediate-frequency and low-frequency, and has small output waveform distortion. ## Claims ### Claim at position 1 -9. (canceled) ### Claim 10 A broadband and large displacement angular vibrator includes a shell, a vibration table, a main spindle which drives the vibration table to rotate, moving coil components, magnetic circuit components, brake components, a motor that drives the magnetic circuit components to rotate and its closed-loop control components, electrical viscoelastic feedback control components, an air bearing and an angular displacement sensor; wherein the main spindle and the moving coil components are fixedly connected, and the magnetic circuit components are fixedly connected with the motor rotor by a connector; wherein the moving coil components include a moving coil substrate, which is connected to the main spindle, and a coil wrapped around the moving coil substrate, and the moving coil substrate is fixedly connected with the main spindle; wherein the magnetic circuit components include a magnetic ring, a central magnetic pole and magnets, and the closed magnetic circuit is produced by the magnetic ring, the central magnetic pole, the magnets and the air gap; the central magnetic pole is located in the magnetic ring and it is coaxial with the magnetic ring, and the magnets are located between the magnetic ring and the central magnetic pole, and absorb on the central magnetic pole, wherein the moving coil components are located between the magnets and the magnetic ring, and the magnetic ring and the moving coil components are coaxial; wherein brake components are on the shell for braking the magnetic circuit components, which include a brake lining, an oil distribution sleeve and an oil cylinder equipped with a piston, wherein the brake lining includes an annular thin-wall deformation part, and the upper connection part and the bottom connection part, which are respectively located at the two end of the thin-wall deformation part, and the upper connection part and the bottom connection part all bulge on thin-wall deformation part, and the upper connection part and the bottom connection part are respectively tightly-coupled with the oil distribution sleeve through the sealing ring, and the brake lining and the oil distribution sleeve together make up a hydraulic oil vessel, and there are connect channels in the oil distribution sleeve, which connects the oil cylinder with the hydraulic oil vessel, and the sealing rings are also equipped between the oil distribution sleeve and the oil cylinder; wherein when the hydraulic oil is pressed and flows from the oil cylinder into the hydraulic oil vessel, the thin-wall deformation part will press the magnetic ring and brake the magnetic circuit components; wherein when the hydraulic oil flows back to the oil cylinder, there will be gaps between the thin-wall deformation part and the magnetic ring, then the magnetic circuit components can rotate with the motor rotor. ### Claim 11 (depends on 10) A broadband and large displacement angular vibrator according to claim 10, wherein the properties are: the fittings include the rotating components and the connection ring, and the rotating components include the spindle that is fixed on the center of base and the rotatable swivel installed on the spindle, and rolling bearings are equipped between the spindle and the swivel. ### Claim 12 (depends on 11) A broadband and large displacement angular vibrator according to claim 11, wherein the properties are: The swivel includes the first connection part which is fixed with central magnetic pole, the second connection part which is fixed with motor rotor and the third connection part which is fixed with connection ring. ### Claim 13 (depends on 12) A broadband and large displacement angular vibrator according to claim 12, wherein the properties are: the first circular grating is designed on the connection ring, and the first reading head and its mounting bracket is designed on an pressing plate, and the first circular grating and the first reading head together become the first angular displacement sensor to detect the movement of motor, and the pressing plate is fixed on the support base of the motor and is pressed on the motor stator to fix the motor stator, and the pressing plate is a ring-shaped connection plate. ### Claim 14 (depends on 13) A broadband and large displacement angular vibrator according to claim 13, wherein the properties are: the oil cylinder piston in the brake components is fixed with the pushrod of the brake air cylinder, the oil cylinder in the brake components contains a cylinder body, a piston that is adapted with the inner cavity of the cylinder body, seals and their adjustments that are designed on the cylinder body, the seals are sealed with the piston, and holding tanks are designed on the cylinder body to accommodate the seals and their adjustments, the steps for supporting the seals are formed on the holding tanks and the upper section of the cylinder body, and the sealing adjustments pressure the seals through the steps. ### Claim 15 (depends on 14) A broadband and large displacement angular vibrator according to claim 14, wherein the properties are: the electrical viscoelastic feedback control components contains the second angular displacement sensor, a feedback unit, a signal generator, a subtracter, a PID controller, a power amplifier and the angular vibrator; the second angular displacement sensor includes the second reading head and second circular grating, and the second circular grating is installed on the vibration table, and the second reading head is installed on the bearing sleeve of the air bearing through a mounting rack; the second angular displacement sensor is used for detecting the angular displacement signal of the moving coil components and the vibration table, and the signal is input to the feedback unit, and the feedback unit amplifies the signal to be the first output signal, and the derivative of the signal is also got and then amplified to be the second output signal, and the output signal of the feedback unit is got after the first output signal and the second output signal are superimposed, and the difference between the output signal of the feedback unit and the standard signal generate by the signal generator is got to be a deviation signal, then the deviation signal is processed by the PID controller and then the output signal is amplified by the power amplifier, and drives the angular vibrator to move to realize the electrical viscoelastic feedback control for the rotating parts of the angular vibrator. ### Claim 16 (depends on 10) A broadband and large displacement angular vibrator according to claim 10, wherein the properties are: the air bearing includes a bearing sleeve and a bearing body, a main spindle sleeve is joined in the bearing body, and the bearing body is joined in the bearing sleeve, and bearing sleeve is fixed with bearing body, and a step is designed at the bottom of the main spindle to fit with the bearing body; a circular inlet groove is designed on the outside surface of the bearing body, and an air inlet is designed on the bearing sleeve, which is connected with the inlet groove, and radial gas ports are designed on the bearing body to guide the gas to the gaps between the bearing body and the main spindle, and the upper axial gas ports are designed on the bearing body to guide the gas to the gaps between the bearing body and the vibration table, and the bottom axial gas ports are designed on the bearing body to guide the gas to the gaps between the bearing body and the step of the main spindle, and orifices are designed at the outlet ends of the radial gas ports, the upper axial gas ports and the bottom axial gas ports, respectively, and they are uniformly distributed along the circumferential direction. ### Claim 17 (depends on 16) A broadband and large displacement angular vibrator according to claim 16, wherein the properties are: the main spindle is hollow to form an exhaust cavity, and the first exhaust channels are designed on the upper end of the main spindle to guide the gas between the bearing body and the vibration table to the exhaust cavity, and the second exhaust channels are designed on the bearing body to guide the gas between the main spindle and the bearing body to exhaust outside, and the exhaust port of the second exhaust channels is located outside of the main spindle step, and the second exhaust channels are evenly distributed on the bearing body and are isolated with the inlet groove; wherein the first exhaust channels include a circular groove that is designed on the upper surface of the main spindle, pores that discharge the gas between the bearing body and the vibration table into the circular groove and axial holes that discharge the gas in the circular groove into the exhaust cavity; the pores are multiple and uniformly distributed along the circular groove; the axial holes are also multiple and uniformly distributed along the circular groove; and the pores are opened along the radial direction of the main spindle upper surface, and the axial holes are opened along the main spindle axial direction; wherein the second exhaust channels include the radial exhaust hole and the axial exhaust hole, and one side of the radial exhaust hole is connected with the gas film between the bearing body and the main spindle, but the other side is connected with the axial exhaust hole; the air outlet of the axial exhaust hole is also the air outlet of the second exhaust channels; the radial exhaust hole guides the gas in the neck part gas film into the axial exhaust hole and then discharge from the axial exhaust hole to the outside; wherein the radial exhaust hole runs through the bearing body, and end caps are designed on the end of the radial exhaust holes where the inlet groove is connected. ### Claim 18 (depends on 17) A broadband and large displacement angular vibrator according to claim 17, wherein the properties are: the shell includes a barrel fixed on the base and a damping block fixed on the bearing sleeve of the air bearing, and the brake components is installed between the barrel and the damping block; the exhaust cavity is connected with the space among the moving coil components, the central magnetic pole and the magnets. ### Claim 19 (depends on 17) A broadband and large displacement angular vibrator according to claim 17, wherein the properties are: the coil of the moving coil components is covered on the outer flank of the moving coil substrate, and the coil includes coil windings and insulation layers, which are alternatively set, and there is at least one coil winding layer. The insulation layers are made of the epoxy and the glass cloth, which will cover the coil winding completely; wherein each coil winding includes the first coil and the second coil, and the first coil is counterclockwise winded from inside to outside, and the second coil is clockwise winded from outside to inside, and the first coil and the second coil are on the same layer, and wounded with multi-turn, each of which is composed by effective wires and connection conductors, and the galvanical effective wires produce ampere force when they are put in the magnetic field, and the connection wires are put outside the magnetic field; wherein the equal-interval-distributed effective wires compose an ampere-force-occurred part, and the number of ampere-force-occurred parts is twice the number of coil windings, and each ampere-force-occurred part contains the same quantity of effective wires, and the epoxy is filled between each turn of the coil winding, and the coil windings are connected with each other in series or parallel.