RU2621712C2 - Rotary piezoelectric engine - Google Patents

Rotary piezoelectric engine Download PDF

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Publication number
RU2621712C2
RU2621712C2 RU2015144435A RU2015144435A RU2621712C2 RU 2621712 C2 RU2621712 C2 RU 2621712C2 RU 2015144435 A RU2015144435 A RU 2015144435A RU 2015144435 A RU2015144435 A RU 2015144435A RU 2621712 C2 RU2621712 C2 RU 2621712C2
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RU
Russia
Prior art keywords
piezoelectric
pushers
rotor
rotation
housing
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RU2015144435A
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Russian (ru)
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RU2015144435A (en
Inventor
Сергей Васильевич Пономарев
Сергей Владимирович Рикконен
Антон Владимирович Азин
Сергей Александрович Орлов
Original Assignee
Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский государственный университет" (ТГУ)
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Priority to RU2015144435A priority Critical patent/RU2621712C2/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K41/00Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/06Rolling motors, i.e. having the rotor axis parallel to the stator axis and following a circular path as the rotor rolls around the inside or outside of the stator; Nutating motors, i.e. having the rotor axis inclined with respect to the stator axis and performing a nutational movement as the rotor rolls on the stator
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00Electric machines in general using piezo-electric effect, electrostriction or magnetostriction
    • H02N2/18Electric machines in general using piezo-electric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators

Abstract

FIELD: electricity.
SUBSTANCE: rotary piezoelectric engine comprises the immovable housing, the rotor with the shaft in the bearing supports of the immovable housing. Inside the fixed housing, the movable housing is coaxially arranged, which is connected to the immovable housing by resilient elements. Two piezoelements with pushers for direct rotor rotation and two piezoelements with pushers for reverse rotor rotation are fixed rigidly on the movable housing. The piezoelements with pushers with one direction of rotation are arranged diametrically opposite. The power supply of the piezoelements with pushers has one output channel for direct rotor rotation and one output channel for reverse rotor rotation. One of the piezoelements with a pusher for both rotation directions is connected through the power supply phase shifter.
EFFECT: increasing the efficiency and the specific power, reducing the overall dimensions, the possibility of reverse rotation, increasing the structure service life and reliability due to the structure equilibrium and the rotational-frictional mode of transferring the torque to the rotor.
2 dwg

Description

The invention relates to piezoelectric engines for use in devices and systems of automation, instrumentation, robotics, aerospace, automotive industry.

Various types of piezoelectric motors are known for use in automation systems and engineering structures. For example, a reverse piezoelectric motor [RF Patent No. 2055442. Reversible vibration motor / Agapova L.S., Ilyin A.G., Yatsenko V.K.], comprising a housing in which a rotor is placed in bearing bearings and a vibrator, which is two piezoelectric elements mounted at an angle to each other. The ends of the piezoelectric elements are connected by a shoe. The vibrator is attached to the body through a spring connected to the shoe. The rotor is located inside the corner formed by the piezoelectric elements. Or a single-frequency wave tubular piezoelectric motor [Soonho Park. Single vibration mode standing wave tubular piezoelectric ultrasonic motor // Theses and dissertations, Toronto. - 2011. - P. 3]. The device consists of a piezotube formed of four piezoelectric elements, two rotors, rigidly mounted on the shaft of the vibroengine and located on the ends of the piezotube. When applying time-shifted sinusoidal stresses, a circular field of elastic mechanical stresses is formed on the piezotube plate, which rotates both rotors and the vibrator motor shaft. A device is also known - a piezoelectric motor design T. Sashida [Soonho Park. Single vibration mode standing wave tubular piezoelectric ultrasonic motor // Theses and dissertations, Toronto. - 2011. - P. 5], consisting of a piezo actuator located at an angle to the surface of the rotor. When a signal is supplied to a piezo actuator, mechanical forces act on the rotor surface at an angle due to the frictional contact of the tangential component of the force, which causes the motor torque.

Closest to the claimed device is a piezoelectric motor design H.V. Bart [Kenji Uchino. Piezoelectric ultrasonic motors: overview // Smart Mater. Struct. - 1998. - P. 274] - prototype. The device consists of a fixed housing, a rotor with a shaft in bearings, two piezoelectric elements with pushers (forward and reverse), rigidly mounted on a fixed housing. When a sinusoidal voltage is applied to the piezoelectric element, the piezoelectric element lengthens and creates a mechanical force on the plunger, due to frictional contact and the misaligned application of force to the rotor, a torque is generated on the motor shaft.

The main disadvantages of the prototype are the low efficiency of the device, low strength in the attachment points of the piezoelectric element, and the possibility of jamming of the moving parts of the engine. In addition, increasing the power of the device is possible only by increasing the volume and power of the piezoelectric element.

The above listed disadvantages are excluded by the proposed design of a rotational piezoelectric motor.

The technical result achieved by the implementation of the present invention consists in increasing the efficiency of the piezoelectric motor and reducing its overall dimensions, the possibility of reverse rotation, increasing specific power, increasing the resource and reliability of the structure due to the balanced design and rotational-friction mode of transmitting torque to the rotor.

The technical result is achieved in that the rotational piezoelectric motor comprises a stationary housing, a rotor with a shaft in the bearings of the stationary housing, a movable housing is coaxially located inside the stationary housing, which is connected to the stationary housing by elastic elements, two piezoelectric elements with pushers for direct rotation are rigidly fixed rotor and two piezoelectric elements with pushers for reverse rotation of the rotor, and piezoelectric elements with pushers with one direction of rotation scheny diametrically opposite, wherein the power source of piezoelectric elements with pushers has a single output channel for direct rotation of the rotor and one output channel for the reverse rotation of the rotor, wherein one of the piezoelectric elements with a pusher for both directions of rotation is connected via a phase shifter power source.

The invention is illustrated by drawings.

FIG. 1 - Composition of a rotational piezoelectric motor.

The rotational piezoelectric motor of FIG. 1 contains two housings: an external fixed housing 1 and an inner movable housing 2, interconnected by elastic elements 3, piezoelectric elements with pushers 4, 5, 6, 7 are rigidly fixed in the inner movable housing - two for direct rotation 4 and 5 and two for reverse rotation 6 and 7 of the rotor 8 with a shaft 9, which is placed in the bearing bearings 10 in the shields 11 of the stationary housing.

The high-frequency power supply 12 through the switch 13 is connected to the piezoelectric element with the pusher 5 directly and 4 through the forward phase shifter 14 for in-phase adjustment of the operation of the piezoelectric elements with the pushers 5 and 4, for reverse rotation through the other contact of the switch (when switching the switch), the piezoelectric element with the pusher 6 is connected directly and the piezoelectric element with the pusher 7 through the reverse rotation phase shifter 15 for in-phase adjustment of the operation of the piezoelectric elements with the pushers 6 and 7.

FIG. 2 - Graphs of the input voltage to the piezoelectric elements.

For the effective operation of the piezoelectric motor, it is necessary that the forces of the piezoelectric elements with pushers (for example, 5 and 4) do not have a temporary phase shift, that is, they work completely in phase (Fig. 2a). It is impossible to produce exactly the same piezoelectric elements and therefore, even with the same excitation signals, the reactions of the piezoelectric elements with pushers 5 and 4 will not coincide in phase, which significantly reduces the total moment of the piezoelectric motor (Fig. 2b). Therefore, the excitation signal is supplied to the piezoelectric element with the pusher 4 through the direct rotation phase shifter 14, on which the phase difference between the operation of the piezoelectric elements with the pushers 5 and 4 is compensated (Fig. 2c).

A rotational piezoelectric motor operates as follows.

When connecting the power source 12 through the switch 13 to one piezoelectric element with a pusher 5 directly and to another, for in-phase adjustment of the vibration displacement, a piezoelectric element with a pusher 4 through a phase shifter 14, the piezoelectric elements with pushers 4 and 5 are extended and create a total torque on the rotor 8, due to friction friction together with the rotor 8 rotates the movable housing 2 with piezoelectric elements rigidly fixed in it with pushers 4, 5, 6, 7 on the elastic elements 3. When removing power from the piezoelectric elements with pushers 4 and 5, the mechanical contact piezoelements with pushers 4 and 5 of the rotor 8 disappears and the movable body 2 with fixed therein piezoelements with pushers 4, 5, 6, 7 by elastic elements 3 returns to the initial state relative to the fixed rotary body piezoelectric motor.

With the repetition of this process, the rotor 8 of the piezoelectric motor rotates counterclockwise.

Reverse rotation of a piezoelectric motor.

When connecting the power source 12 through the switched switch 13 to one piezoelectric element with the pusher 6 directly and to the other for in-phase adjustment of the vibration displacement of the piezoelectric element with the pusher 7 through the phase shifter 15, the piezoelectric elements with the pushers 6 and 7 are extended and create the total torque on the rotor 8, due to the friction together with the rotor 8, the movable body 2 rotates with the piezoelectric elements rigidly fixed in it with pushers 4, 5, 6, 7 on the elastic elements 3. When removing power from the piezoelectric elements with pushers 6 and 7, the mechanical cal contact with pushers piezoelectric elements 6 and 7 with the rotor 8 disappears and the movable body 2 with fixed therein piezoelements with pushers 4, 5, 6, 7 by elastic elements 3 returns to the initial state relative to the fixed rotary body piezoelectric motor.

With the repetition of this process, the rotor 8 of the piezoelectric motor rotates clockwise.

Of the sources of information and patent materials known to the authors, the totality of features similar to the totality of features of the claimed subject matter is not known.

LITERATURE

1. Pat. 2055442 Russian Federation, IPC H02N 2/10, Reversible vibration motor / Agapova L.S., Ilyin A.G., Yatsenko V.K.

2. Soonho Park. Single vibration mode standing wave tubular piezoelectric ultrasonic motor // Theses and dissertations, Toronto. - 2011 .-- 136 p.

3. Kenji Uchino. Piezoelectric ultrasonic motors: overview // Smart Mater. Struct. - 1998 .-- P. 273-285.

Claims (1)

  1. A rotational piezoelectric motor comprising a stationary housing, a rotor with a shaft in the bearings of the stationary housing, two piezoelectric elements with forward and reverse pushers, characterized in that an additional movable housing is coaxially placed inside the stationary housing, which is connected to the stationary housing by elastic elements on the movable housing two piezoelectric elements with pushers for direct rotation of the rotor and two piezoelectric elements with pushers for reverse rotation of the rotor, and the piezoelectric element is rigidly fixed Threads with pushers with one direction of rotation are diametrically opposite, while the power supply of piezoelectric elements with pushers has one output channel for direct rotation of the rotor and one output channel for reverse rotation of the rotor, and one of the piezoelectric elements with pusher for both directions of rotation is connected through the phase shifter of the power source .
RU2015144435A 2015-10-15 2015-10-15 Rotary piezoelectric engine RU2621712C2 (en)

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RU2015144435A RU2015144435A (en) 2017-04-21
RU2621712C2 true RU2621712C2 (en) 2017-06-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2703256C1 (en) * 2018-12-29 2019-10-16 Николай Иванович Кузин Electrostatic motor

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU612357A1 (en) * 1975-11-06 1978-06-25 Abramov Valentin A Wave-type electric motor
JPS61142978A (en) * 1984-12-17 1986-06-30 Nec Corp Step motor using piezoelectric element
US5144187A (en) * 1990-03-23 1992-09-01 Rockwell International Corporation Piezoelectric motor
RU2055442C1 (en) * 1992-07-17 1996-02-27 Любовь Стратоновна Агапова Reversing vibration motor
US20050269907A1 (en) * 2004-06-08 2005-12-08 Erickson David J Power generator employing piezoelectric materials
EP2041812A1 (en) * 2006-07-17 2009-04-01 Siemens Aktiengesellschaft Electromechanical motor
US20120146461A1 (en) * 2007-05-18 2012-06-14 Continental Automotive Gmbh Electromechanical Motor Especially a Piezoelectric Microstepper Motor
US20120204674A1 (en) * 2007-12-05 2012-08-16 Ivan Lundberg Harmonic motor, drive assembly, industrial robot, robot boom and robot joint
WO2014013443A1 (en) * 2012-07-18 2014-01-23 Cau Nicola Lussorio Improved torque rotary motor
US20150167801A1 (en) * 2012-07-17 2015-06-18 Nicola Lussorio Cau Motor with linear actuators

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU612357A1 (en) * 1975-11-06 1978-06-25 Abramov Valentin A Wave-type electric motor
JPS61142978A (en) * 1984-12-17 1986-06-30 Nec Corp Step motor using piezoelectric element
US5144187A (en) * 1990-03-23 1992-09-01 Rockwell International Corporation Piezoelectric motor
RU2055442C1 (en) * 1992-07-17 1996-02-27 Любовь Стратоновна Агапова Reversing vibration motor
US20050269907A1 (en) * 2004-06-08 2005-12-08 Erickson David J Power generator employing piezoelectric materials
EP2041812A1 (en) * 2006-07-17 2009-04-01 Siemens Aktiengesellschaft Electromechanical motor
US20120146461A1 (en) * 2007-05-18 2012-06-14 Continental Automotive Gmbh Electromechanical Motor Especially a Piezoelectric Microstepper Motor
US20120204674A1 (en) * 2007-12-05 2012-08-16 Ivan Lundberg Harmonic motor, drive assembly, industrial robot, robot boom and robot joint
US20150167801A1 (en) * 2012-07-17 2015-06-18 Nicola Lussorio Cau Motor with linear actuators
WO2014013443A1 (en) * 2012-07-18 2014-01-23 Cau Nicola Lussorio Improved torque rotary motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2703256C1 (en) * 2018-12-29 2019-10-16 Николай Иванович Кузин Electrostatic motor

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