CN205754065U - A kind of runner auto-excitation type circular piezoelectric vibrator electromotor - Google Patents

Abstract

This utility model relates to a kind of runner auto-excitation type circular piezoelectric vibrator electromotor, belongs to field of piezoelectric generation.Gear shaft is placed in disk body centre bore, and disk body side is provided with heavy chamber and guide hole, opposite side is provided with slideway；Slideway end is through equipped with side plate, and side plate gear shaft is connected；Side plate is provided with heavy chamber and guide hole；Disk body sinks chamber and side plate sinks intracavity and is provided with excited magnet equipped with piezoelectric vibrator, the center of piezoelectric vibrator, and excited magnet is placed in disk body or side plate guide hole；Both sides are inlaid with the cylindrical activator of exciting magnet and are placed in the slideway being filled with lubricating oil；When activator quantity is more than 1, can be equipped with isolator between adjacent actuators.Advantage characteristic: without suffered by the external world fixing support, simple in construction, activator, rotatory force is little, the actuation duration easily adjusts, effective range of speeds is big；The structural parameters of piezoelectric vibrator are reasonable, generated energy is big；Piezoelectric chip bears compressive stress excitation, reliability height；Can be as standard component for cantilevered axle gear and the coaxial occasion of multi-gear.

Description

A kind of runner auto-excitation type circular piezoelectric vibrator electromotor

Technical field

This utility model belongs to new forms of energy and technical field of power generation, is specifically related to a kind of runner auto-excitation type circular piezoelectric vibrator Electromotor, rotates facility monitoring system power supply for electric power such as wind turbine gearboxes.

Background technology

Gear-box is the critical component of wind power generating set, and its function is transmission power.When wind-driven generator runs well, The rotating speed of wind wheel is relatively low, cause generator efficiency relatively low, therefore need to be by gear-box speedup to improve generating capacity and efficiency.Due to Wind turbine gearbox is operated under speed change varying load environment, therefore easily breaks down；Additionally, maintenance is tired when wind turbine gearbox breaks down Difficulty and cost are high, and wind turbine gearbox runs and maintenance cost may be up to the 30% of overall operation cost.Therefore, there has been proposed The gear-box real-time monitoring system for state of various ways and method, to obtaining each relevant parameter of gear-box in real time, sending out in time Now and solve problem, thus reduce device damage degree and maintenance cost.At present, the key element of wind turbine gearbox monitoring includes tooth All many-sides such as the load of moving component, vibration and temperature such as wheel, bearing and wheel shaft.

For the monitoring of gear and axle, preferable method is to be arranged on gear or axle by all kinds of sensing and monitoring systems Or install near gear or axle, thus realize the direct-on-line monitoring of its running status；But this monitoring scheme is because being biography Reliable, the sufficient supply of electric power that provides of sense monitoring system is difficult to popularization and application, and reason is: 1. gear and axle are in rotation Kinestate, it is impossible to pass through cable power supply；2. as used battery to power, need to often change because battery is limited, when Battery electric quantity is not enough and will be unable to realize effectively monitoring when changing the most in time；3. away from cantilevered axle and the end tooth thereof of bearing block When wheel and multiple gear are coaxial, all cannot be generated electricity by relative motion structure microminiature between swing pinion or axle and fixing support Machine.It is limited to the monitoring system energy supply problem of wind turbine gearbox gear and axle, current reality also cannot realize real meaning On real time on-line monitoring.

Summary of the invention

For the problem existing for wind turbine gearbox monitoring system power supply aspect, the utility model proposes a kind of runner self-excitation Formula circular piezoelectric vibrator electromotor.This utility model adopted implementation scheme is that gear shaft is placed in disk body centre bore, disk body one Side is provided with disk body and sinks chamber and disk body guide hole, opposite side and be provided with slideway；Slideway end is provided with side plate through screw, side plate through screw with Gear shaft is connected, and side plate is provided with side plate and sinks chamber and side plate guide hole；Disk body guide hole and side plate guide hole are blind hole；Disk body sink chamber and Side plate sinks intracavity and is all provided with piezoelectric vibrator by screw and end cap, piezoelectric vibrator by metal basal board and piezoelectric chip bonding and Become；Piezoelectric vibrator center is provided with excited magnet, in excited magnet is placed in disk body guide hole or in side plate guide hole；Cylindrical swashs Encouraging device to be placed in the slideway being filled with lubricating oil, activator both sides are all inlaid with exciting magnet；When activator quantity is more than 1, two The isolator of nonferromugnetic material can be installed between individual circumferencial direction adjacent actuators；Piezoelectric vibrator number when activator side When amount and activator quantity are both greater than 1, angle and two adjacent pressures between the center of circle of two adjacent actuators with disk body centre of gyration line Between angle between electric tachometer indicator center and the disk body line of centres can not integral multiple each other, thus reduce suffered by each cylinder activator Total tangential force rotatory force；When the like pole of axially adjacent excited magnet and exciting magnet is in time installing, piezoelectric vibrator In piezoelectric chip near slideway side install；When the opposite pole of axially adjacent excited magnet and exciting magnet is near installing Time, in piezoelectric vibrator, metal basal board is installed near slideway side.

In this utility model, for improving piezoelectric vibrator generating capacity, metal basal board is the beryllium-bronze of 0.2mm thickness, piezoelectricity Wafer d2 is the PZT4 that 0.3mm is thick；The voltage V that the deformation of piezoelectric vibrator first order buckling generates_gWith electric energy E_gIt is respectivelyWithIn formula, F is between excited magnet and exciting magnet Maximum axial active force, R_mFor metal basal board effective radius, R_pRadius for piezoelectric chip；R_mGive timing, rational R_pByTry to achieve.

In work process, gear shaft drives disk body, side plate, piezoelectric vibrator and excited magnet to rotate；At disk body rotation process In, activator and inlayed exciting magnet are in the bottom of slideway under the effect of its inertia force, so that exciting magnet and being subject to Relative motion is produced between excitatory ferrum.When piezoelectric vibrator and excited magnet go to exciting magnet close to time, excited magnet with swash The axial force that field core is asked is gradually increased, and piezoelectric vibrator produces axial bending deformation；When excited magnet and exciting magnet During the overlap of center, the deflection of piezoelectric vibrator reaches maximum；When the overlapping area of excited magnet Yu exciting magnet is gradually reduced, The deflection of piezoelectric vibrator is gradually reduced and finally returns to naturalness；After above-mentioned excited magnet is close to each other with exciting magnet During being gradually distance from again, piezoelectric vibrator completes a power generation process；When using multiple activator to encourage, the actuation duration can Adjusted by the quantity of isolator.

Advantage and characteristic: 1) utilize relative motion that inertia force realizes between disk body and activator and encourage piezoelectric vibrator axial Bending, it is not necessary to rotating torque suffered by extraneous fixing support, simple in construction, activator is little；2) actuation duration is prone to pass through isolator Quantity regulating, effective range of speeds width；3) structural parameters of piezoelectric vibrator are reasonable, and generated energy is big；4) in work, piezoelectric chip holds Compression chord excitation, reliability height；5) can be as building block for cantilevered axle gear and the coaxial occasion of multi-gear, it is achieved true The gear on-line monitoring of positive meaning.

Accompanying drawing explanation

Fig. 1 is the structural representation of electromotor in one preferred embodiment of this utility model；

Fig. 2 is without the A-A sectional view of Fig. 1 during isolator between activator；

The A-A sectional view of Fig. 1 when Fig. 3 is to have isolator between activator；

Fig. 4 is the B-B sectional view of Fig. 1；

Fig. 5 is the structural representation after disk body and side plate assemble in one preferred embodiment of this utility model；

Fig. 6 is piezoelectric vibrator generated energy and the graph of a relation of structural parameters in one preferred embodiment of this utility model；

Fig. 7 is piezoelectric vibrator generated energy and the graph of a relation of piezoelectric chip radius in one preferred embodiment of this utility model.

Detailed description of the invention

Cantilevered axle b of gear a is placed in the centre bore c4 of disk body c, and the side of disk body c is provided with disk body and sinks chamber c1 and disk body is led Hole c2, opposite side are provided with slideway c3；The end of slideway c3 is provided with side plate h, side plate h through screw and is connected with cantilevered axle b through screw, Side plate h is provided with side plate and sinks chamber h1 and side plate guide hole h2；Disk body guide hole c2 and side plate guide hole h2 is blind hole；Disk body sink chamber c1 and Side plate sinks and is all provided with piezoelectric vibrator d by screw and end cap e in the h1 of chamber, and piezoelectric vibrator d is by metal basal board d1 and piezoelectric chip D2 is bonding to be formed；The center of piezoelectric vibrator d is provided with in excited magnet g, excited magnet g are placed in disk body guide hole c2 or side plate is led In the h2 of hole；Cylindrical activator i is placed in the slideway c3 being filled with lubricating oil, and the both sides of activator i are all inlaid with excitation magnetic Ferrum f；When the quantity of activator i is more than 1, between the activator i that two circumferencial directions are adjacent, nonferromugnetic material can be installed Isolator j；When the quantity of piezoelectric vibrator d of activator i side and the quantity of activator i are both greater than 1, two adjacent actuators The center of angle Q2 and two adj acent piezoelectric oscillator d and the line of centres of disk body c between the center of circle of i and disk body c centre of gyration line Between angle Q1 between can not integral multiple each other, thus reduce the total tangential force rotatory force suffered by each cylinder activator i；Work as axle Like pole to adjacent excited magnet g and exciting magnet f is close when installing, and in piezoelectric vibrator d, piezoelectric chip d2 is near sliding C3 side, road is installed；When the opposite pole of axially adjacent excited magnet g and exciting magnet f is in time installing, in piezoelectric vibrator d Metal basal board d1 installs near slideway c3 side.

In this utility model, for improve piezoelectric vibrator d generating capacity, metal basal board d1 be 0.2mm thickness beryllium-bronze, Piezoelectric chip d2 is the PZT4 of thickness 0.3mm；The voltage V that the deformation of piezoelectric vibrator d first order buckling generates_gWith electric energy E_gIt is respectivelyWithIn formula, F is between excited magnet g and exciting magnet f Maximum axial active force, R_mFor the effective radius of metal basal board d1, R_pRadius for piezoelectric chip d2；R_mGive timing, reasonably R_pByTry to achieve.

In work process, cantilevered axle b of gear a drives disk body c, side plate h, piezoelectric vibrator d and excited magnet g to rotate；? In disk body c rotation process, activator i and inlayed exciting magnet f is in the bottom of slideway c3 under the effect of its inertia force, from And make to produce between exciting magnet f and excited magnet g relative motion.When piezoelectric vibrator d and excited magnet g goes to and exciting magnet F close to time, the axial force between excited magnet g and exciting magnet f is gradually increased, piezoelectric vibrator d produce axial bending deformation； When excited magnet g is overlapping with the center of exciting magnet f, the deflection of piezoelectric vibrator d reaches maximum；When excited magnet g is with sharp When the overlapping area of field core f is gradually reduced, the deflection of piezoelectric vibrator d is gradually reduced and finally returns to naturalness；On State excited magnet g and exciting magnet f close to each other after be gradually distance from again during, piezoelectric vibrator d completes and once generated electricity Journey；When using multiple activator i to encourage, the actuation duration can be adjusted by the quantity of isolator j.

Obviously, this utility model utilizes the relative motion between the inertia force realization of cylinder activator i and disk body c and encourages Piezoelectric vibrator d axial bending, it is not necessary to tangential rotatory force suffered by extraneous fixing support, simple in construction, activator is little；Use multiple sharp When encouraging device i excitation, the actuation duration is prone to be adjusted by isolator j, and effective range of speeds is big；The structural parameters of piezoelectric vibrator d close Reason, generated energy are big；In work, piezoelectric chip d2 bears compressive stress excitation, reliability height；Can be used for cantilevered axle gear and multi-gear Coaxial occasion, it is achieved the gear of real meaning and the on-line monitoring of axle system.

Claims (1)

1. a runner auto-excitation type circular piezoelectric vibrator electromotor, it is characterised in that: gear shaft is placed in disk body centre bore, disk body Side is provided with disk body and sinks chamber and disk body guide hole, opposite side and be provided with slideway；Slideway end is provided with side plate through screw, and side plate is through screw Being connected with gear shaft, side plate is provided with side plate and sinks chamber and side plate guide hole, disk body guide hole and side plate guide hole and be blind hole；Disk body sinks chamber Sink intracavity with side plate and all by screw and end cap, piezoelectric vibrator be installed, piezoelectric vibrator by metal basal board and piezoelectric chip bonding and Become；Piezoelectric vibrator center is provided with excited magnet, in excited magnet is placed in disk body guide hole or in side plate guide hole；Cylindrical swashs Encouraging device to be placed in the slideway being filled with lubricating oil, activator both sides are all inlaid with exciting magnet；When activator quantity is more than 1, two The isolator of nonferromugnetic material can be installed between circumferencial direction adjacent actuators；When activator side piezoelectric vibrator quantity is with sharp Encourage device quantity when being both greater than 1, between the two adjacent actuators centers of circle with disk body centre of gyration line in angle and two adjacent piezoelectric vibrators Can not integral multiple each other between angle between the heart and the disk body line of centres；When axially adjacent excited magnet and the exciting magnet same sex Magnetic pole is in time installing, and piezoelectric chip is installed near slideway side；When axially adjacent excited magnet and the opposite sex of exciting magnet Magnetic pole is in time installing, and metal basal board is installed near slideway side.