CN106353024B - Mechanical seal face friction torque measuring device based on piezoelectric effect power supply - Google Patents
Mechanical seal face friction torque measuring device based on piezoelectric effect power supply Download PDFInfo
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- CN106353024B CN106353024B CN201610877966.2A CN201610877966A CN106353024B CN 106353024 B CN106353024 B CN 106353024B CN 201610877966 A CN201610877966 A CN 201610877966A CN 106353024 B CN106353024 B CN 106353024B
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- axle sleeve
- main shaft
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- mechanical seal
- module
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0042—Force sensors associated with force applying means applying a torque
Abstract
This technology provides a kind of torque precise measurement that can be realized mechanical seal to be measured in mechanical sealing performance tester, mechanical seal face friction torque measuring device based on piezoelectric effect and wireless data transmission, it includes axle sleeve, trundle, force snesor, signal processor, wireless transmitter module, wireless receiving module, self-powered module；Main shaft passes through axle sleeve, and the mechanical seal of end face friction torque to be measured is set on axle sleeve, and rotating ring is connected on axle sleeve, and stationary ring is fixed on seal chamber；The torque that the dynamic and static ring of the mechanical seal is generated due to end face friction, is balanced each other with main shaft by the torque that trundle passes to axle sleeve；The product of the arm of force of peripheral force and force-detecting position that the torque is measured by the force snesor pasted on trundle determines that the peripheral force surveyed is transmitted to wireless receiving module by signal processor processes and by wireless transmitter module；It is powered by self-powered module to signal processor and wireless transmitter module using the electric energy that main shaft or axle sleeve rotation generate.
Description
Technical field
The application be the applying date be on January 15th, 2015, application No. is 2015100208076, it is entitled based on from
The divisional application of the original application of the mechanical seal face friction torque measuring device of power supply and wireless data transmission.
This technology belongs to the field of test technology, more particularly to a kind of examination for carrying out mechanical seal face friction torque measurement
Experiment device.
Background technique
The continuous deterioration of the increasingly in short supply and environment of resource, proposes the production requirement of zero leakage and zero-emission to enterprise.
On the one hand mechanical seal is provided safeguard as the main shaft seal for moving equipment in industrial production for the leakproof of equipment, on the other hand,
Due to end face frictional wear, shaft power is also consumed.For this purpose, people are continually striving to, seek suitable face pressure and material, with
Reduce end face friction power loss, extend service life, while guaranteeing the leakproofness of mechanical seal again.However, sealing pair match materials
Quality and face pressure properly whether, embody a concentrated reflection of in the size of end face friction torque.
In currently known technology the end face friction torque measurement method of mechanical sealing performance tester have anti-Zhi Lifa and
TRANSFER METHOD.The end face friction torque measuring technique that developed by both methods has 4 kinds:
Dynamometer link is installed on rotary seal chamber and is connected to torque sensor.As (Beijing mechanical seal: chemical industry goes out Mayer
Version society, 1981) it measures seal face with the torque sensor of being installed on rotary seal chamber of the propositions such as patent CN103630301 and rubs
Wipe torque technology.Seal chamber need to be supported by this technology, and the friction that seal chamber rotationally supports can not to measuring accuracy presence
The influence of ignorance.
Torque speed sensor is installed between motor and line shaft.Such as Silvaggio (Silvaggo J A, Lipski
M J,and Van Bramer K G.Successful Field Operation through Seal Development
And Testing.Lubrication Engineering, 1987,43 (6): 433-439) and document (high parameter mechanical seal
Testing stand data acquisition and control system petroleum machinery, the 1st phase of volume 32 in 2004) etc. propositions use in motor and bearing block
Between installation torque speed sensor measure mechanical seal face friction torque.When test, the torque of this technology measurement is
Total torque on experimental rig main shaft, the frictional resistance moment and machinery of friction torque, base bearing including tested seal face are close
Seal stirring torque of the rotary part in sealing medium.Due to carrying the frictional resistance moment and machinery of the base bearing of axially different power
Sealing stirring torque of the rotary part in the sealing medium of different pressures can not also directly measure, usually with the main shaft under zero load
Stirring torque that the frictional resistance moment and sealing medium held are under normal pressure replaces, these give the measurement of end face friction torque
Precision brings very big influence；In addition, when due to mechanical seal test device starting total torque be 5-7 times of normal torque with
On, thus need to be equipped with the torque speed sensor of larger stress shaft diameter, and the mechanical seal test device under operating normally
End face friction torque it is smaller, if with this torque speed sensor measure mechanical seal face friction torque, the axis generated
Strain is smaller, and measurement accuracy will be lower.In order to improve measurement accuracy, the stress shaft diameter of selected torque sensor just should be compared with
It is small, but the lesser stress axis of diameter is easy to produce plastic deformation again and is even broken, so both measurement accuracy and stress axis size
It can not get both.
Torque sensor is installed between stationary seat and stationary ring.Sun Jianjun (answer by mechanical seal controllability Study and its engineering
With the discussion mechanical engineering journal of problem, 2005,41 (2): 15-19) etc. propositions torque is installed between stationary seat and stationary ring
Small-range major diameter tubular torque sensor is exactly connected on stationary seat by the method for sensor measurement seal face friction torque
Between stationary ring, generated friction torque is deflected with dynamic and static ring by rotating ring rotation and is put down by the resistive torque of torque sensor
Weighing apparatus, to measure mechanical seal face friction torque.The advantages of this method is that sensor structure is simple, easy for installation, especially
Influence of the frictional resistance moment to measurement of O-ring between stationary ring and stationary seat is eliminated, but small-range major diameter tubular torque passes
The design and manufacture of sensor have difficulties, and fail to obtain effective breakthrough always.For the mechanical seal with bellows stationary ring, end face
Friction torque can use patent ZL 200610039084.5 " multi-parameter controllable high-rotating speed mechanical sealing performance tester "
In method measurement, measuring system described in this method is driven fan-shaped gear piece by stationary seat, guide cylinder, angular displacement, angular displacement passes
Sensor and pinion gear composition；Guide cylinder one end is closely connect with stationary ring filler ring inner hole thread, and the other end loop of guide cylinder is quiet
It is reached outside seal chamber in ring seat gland inner hole and by axle sleeve.It is measured and is stretched out outside seal chamber by angular displacement sensor
The offset of guide cylinder can measure the mechanical variation for being sealed in work front and back elastic element windup-degree, further according to elastic element
Rigidity Calculation goes out end face friction torque.This measurement method can make the angular displacement of stationary ring pass to guide cylinder without loss, until
Fan-shaped gear piece, until pinion gear, then to angular displacement sensor, avoid interference of the additional torque to measured value.But it is present in sector
Driving error between gear piece and pinion gear drastically influences measurement accuracy.
The mechanical seal face friction torque measurement method that patent CN102183327B is related to is placed on stationary ring notch
Coin type torque sensor.With the null principle of moment balance of total torque suffered by stationary ring when operating normally, by sensor institute
It surveys each moment of resistance and is added as end face friction torque.For being supported by rotating ring, stationary ring, stationary ring sealing O-ring, load sensor
In the mechanical seal measuring system that frame, load sensor, end face bearing, end face bearing block and seal chamber end cap form, 2 loadings
Sensor axis is symmetrically mounted on the load sensor bracket of seal chamber end cap inner hole side, and force-detecting position is along a tangential direction at axial symmetry
It is arranged in the side of 2 anti-rotation pin holes of stationary ring.It is quiet due to the effect of the end face friction torque Mm between dynamic and static ring in work
Ring has the trend to rotate with phantom ring, the friction of this trend seal chamber end cap inner hole suffered by stationary ring sealing O-ring
The moment of resistance M1s that moment of resistance Mf and the load sensor of anti-rotation pin hole lateral position installation generate is balanced, i.e. Mm=Mf+M1s.
2 anti-rotation pin hole sides of stationary ring can be arranged in seal chamber in the wherein frictional resistance moment Mf of stationary seat inner hole and O-ring
Load sensor makes a reservation in advance；The moment of resistance Ms that the load sensor that anti-rotation pin hole lateral position is installed under working condition generates is by passing
The tangential force equivalent on the stationary ring periphery that sensor measures is obtained multiplied by the distance between 2 load sensor force-detecting positions (arm of force).This
Method disadvantage is equally obvious, because to measure the frictional resistance moment of seal chamber end cap inner hole suffered by O-ring, and O-ring is because of its material
Matter reason, individual between coefficient of friction be also not quite similar, cause end face friction torque measurement precision it is not good enough.
Torque sensor is set between axle sleeve and axis.As patent CN103267613A propose axle sleeve both ends open up about
Trundle is arranged on corresponding to the main shaft at U-shaped mouth in the symmetrical U-shaped mouth of axle sleeve central cross-section；Two sections of spiral shells are processed in the middle part of axle sleeve
Away from equal, oppositely oriented screw thread, two nuts are screwed on it, and back side is installed dynamic in two mechanical seals to be measured respectively
Ring seat；Rotating seat slides axially with axle sleeve, is connected circumferentially positioned；Circumferential force snesor is arranged on trundle to be used to survey indirectly
Measure end face friction torque.Should be pointed out that is, which does not refer to detailed torque sensor arrangement embodiment, i.e., in height
Long-time powerup issue under fast state when the specific effective transmission and wireless signal transmitting of wireless signal.
Summary of the invention
The purpose of this technology is to provide a kind of torsion that can be realized mechanical seal to be measured in mechanical sealing performance tester
Square precise measurement is capable of self-powered in the course of work and carries out the mechanical seal face friction torque measurement of wireless data transmission
Device.
Mechanical seal face friction torque measuring device described in this technology based on self-powered and wireless data transmission, packet
Include trundle, force snesor, the signal for offering the axle sleeve of U-shaped mouth on the same bus in both ends, being connected on main shaft across U-shaped mouth
Processor, wireless transmitter module, wireless receiving module, self-powered module；Main shaft passes through axle sleeve, the machine of end face friction torque to be measured
Tool sealing is set on axle sleeve, and rotating ring is connected on axle sleeve, and stationary ring is fixed on seal chamber；It is characterized in that: the machinery is close
The torque that the dynamic and static ring of envelope is generated due to end face friction, is balanced each other with main shaft by the torque that trundle passes to axle sleeve；This
The product of the arm of force of peripheral force and force-detecting position that torque is measured by the force snesor pasted on trundle determines, the circumferential direction surveyed
Power is transmitted to wireless receiving module by signal processor processes and by wireless transmitter module；It is generated using main shaft or axle sleeve rotation
Electric energy is powered by self-powered module to signal processor and wireless transmitter module.
The above-mentioned mechanical seal face friction torque measuring device based on self-powered and wireless data transmission, feature
It is that the self-powered module includes the magnet being fixed on outside seal chamber, the coil windings for following main shaft to rotate, rectification circuit
And voltage regulator circuit, the coil windings cutting magnetic line of rotation are handled after generating induced electromotive force through over commutation circuit, voltage regulator circuit
As stable DC source.Here it is the mechanical seal face friction torque surveys based on induced electromotive force and wireless data transmission
Measure device.
The above-mentioned mechanical seal face friction torque measuring device based on self-powered and wireless data transmission, feature
It is that the sleeve end is wrapped main shaft end using enclosed construction, one placement box of sleeve end connection is built-in with
Signal processor, wireless transmitter module, rectification circuit and voltage regulator circuit, output end and rectification circuit, the pressure stabilizing electricity of coil windings
Road is connected.
The above-mentioned mechanical seal face friction torque measuring device based on self-powered and wireless data transmission, feature
It is that the self-powered module includes piezoelectric chip, pressure block and the voltage regulator circuit for following main shaft to rotate；When piezoelectric chip is in diameter
To when being squeezed by the pressure block rotated with main shaft, inside can generate polarization phenomena, make charged ion that relative displacement occur, thus
The opposite charge of symbol equal in magnitude is generated on plane of crystal and forms two poles, is treated as through voltage regulator circuit stable straight
Galvanic electricity source.Here it is the mechanical seal face friction torque measuring devices based on piezoelectric effect and wireless data transmission.
The above-mentioned mechanical seal face friction torque measuring device based on self-powered and wireless data transmission, feature
It is that the sleeve end is wrapped main shaft end using enclosed construction, one placement box of sleeve end connection is built-in with
Signal processor, wireless transmitter module, voltage regulator circuit and piezoelectric chip and pressure block；The periphery of piezoelectric chip sticks in placement
On the inner hole wall of box, pressure block is sticked on the inner sidewall of piezoelectric chip.
The above-mentioned mechanical seal face friction torque measuring device based on self-powered and wireless data transmission, feature
It is circumferentially uniformly to place 3 or more balls between the both ends and main shaft of the axle sleeve respectively on the cross section of axis.
It can reduce friction in this way, passed so that dynamic and static ring friction torque almost to be passed to the power pasted on trundle without loss
Sensor.
This technology has the advantage that and good effect:
Realize the precise measurement of mechanical seal face friction torque.End face friction torque by main shaft, trundle there are few
Loss passes to axle sleeve.The power measured by piezoelectric transducer multiplied by the corresponding arm of force (force snesor to spindle centerline away from
From) obtained end face friction torque, precision is improved.
U-shaped mouth is opened up on axle sleeve, fixed conveyor pin on main shaft corresponding with U-shaped mouth, in trundle side wall and U-shaped mouth side
Force snesor is placed at wall.By measurement mechanical seal test device operate normally when trundle side wall suffered by peripheral force multiplied by
The corresponding arm of force obtains end face friction torque.The end face that coin type torque sensor obtains is placed compared in stationary ring stop pin opening
Friction torque avoids the frictional resistance moment between stationary ring sealing O-ring and seal chamber end cap inner hole, improves the essence of actual measurement
Accuracy.
The axle sleeve is wrapped main shaft end using semi-enclosed structure, the placement box of end directly with axle sleeve phase
Even, integral with axle sleeve.Signal processor is (including signal amplification module, signal conditioning module, the list with A/D conversion function
Piece machine etc.), wireless transmitter module, rectification circuit, voltage regulator circuit place and rotate in the placement box of main shaft end with axle sleeve.Installation
When only need to be set on main shaft with the axle sleeve of mechanical seal, at the U-shaped mouth of axle sleeve by trundle by screwing in main shaft
The screw of screw hole is fixed, and when disassembly need to only shed trundle and can unload axle sleeve from main shaft together with placement box, convenient
Fast.
This experimental rig has installed ball additional in main shaft and shaft room, so that main shaft and shaft room are become by original static friction
Sliding friction improves the precision of end face friction torque measurement.
The signal of acquisition is sent to axis external signal receiving end by the way of wireless data transmission, avoids measurement dynamic
The winding problem of transmission signal line when torque signal.
Self-powered module is ingenious to test high-speed rotating main shaft by mechanical seal, utilizes main shaft high speed rotation band moving winding
Winding, which surrounds, is fixed on the magnet rotors of seal chamber, the coil windings cutting magnetic line of rotation generate induced electromotive force and as electricity
Source；Or piezoelectric chip and pressure block are driven by main shaft high speed rotation, under the centrifugal force effect of pressure block, piezoelectric chip
The positive and negative charge of surfaces externally and internally redistributes, and forms positive and negative charged surface and becomes power supply.Mechanical sealing performance testing machine main shaft
Once operating, self-powered module just starts to generate electricity, as long as mechanical sealing performance testing machine does not shut down, self-powered module
Continued power solves self-powered module to signal processor and wireless transmitter module long period power reguirements, avoids dry electricity
Pond or lithium battery power supply system occur needing to shut down the generation that battery phenomenon is replaced in provision for disengagement during test.
Detailed description of the invention
Fig. 1 is a kind of mechanical seal face friction torque measuring device based on induced electromotive force and wireless data transmission
Schematic diagram；
Fig. 2 is the enlarged drawing of main shaft, axle sleeve, magnet, coil windings, placement box in Fig. 1 etc.；
Fig. 3 is A in Fig. 1 to partial view；
Fig. 4 is a kind of showing for mechanical seal face friction torque measuring device based on piezoelectric effect and wireless data transmission
It is intended to；
Fig. 5 is the enlarged drawing of main shaft, axle sleeve, piezoelectric chip, pressure block, placement box in Fig. 4 etc.；
Fig. 6 is the B-B cross-sectional view of Fig. 5；
Fig. 7 is wireless sending module NRF24L01 workflow schematic diagram；
Fig. 8 is the block diagram of signal processing and transmitting module；
Fig. 9 is the block diagram of signal reception and processing module.
In figure, main shaft 1, axle sleeve 2, front end U-shaped mouth 21, rear end U-shaped mouth 23, ball 3, seal chamber 4, end cap 41, side leakage chamber
End cap 5 disposes box 6, stationary ring O-ring 71, stationary ring 72, rotating ring 73, rotating ring O-ring 74, filler ring 75, spring 76, rotating seat 77, spiral shell
Mother 78, short pin 79, trundle 8, force snesor 9, magnet 101, coil windings 102, rectification circuit 103, voltage regulator circuit 104, pressure
Power block 108, piezoelectric chip 109.
Specific embodiment
This technology is described further below with reference to schematic diagram and specific embodiment:
Referring to shown in Fig. 1-6,1 periphery of main shaft is formed by ball 3 and axle sleeve 2 and is rotatablely connected.The right end of axle sleeve 2 is closed,
Main shaft protrudes into axle sleeve.Main shaft and axle sleeve pass through the seal chamber 4 that both ends have end cap 41 jointly, and seal chamber right end is fixed with side leakage
Chamber end cap 5.The placement box 6 in side leakage chamber end cap is fixed on the outside of the right end closed end of axle sleeve.
Tested mechanical seal respectively includes stationary ring O-ring 71, stationary ring 72, rotating ring 73, rotating ring O-ring 74, filler ring 75, spring
76, rotating seat 77, nut 78, short pin 79 etc..Rotating ring 73 slides axially with rotating seat 77 to be connected circumferentially positioned, in rotating seat
Spring 76, filler ring 75, rotating ring O-ring 74 are disposed between 77 and rotating ring 73；Rotating ring 73 passes through rotating ring O-ring 74 and axle sleeve
Between seal.Filler ring 75 slides axially with rotating seat 77 and connect.Stationary ring 72 passes through the stationary ring O shape being arranged on 72 periphery of stationary ring
Circle 71 is connected with the centre bore sealing on end cap；Stationary ring 72 is with rotating ring 73 axially opposing.There are two sections of screw pitch phases in the middle part of axle sleeve 2
Deng, oppositely oriented screw thread；Two nuts 78 are threadedly engaged with described respectively；The short pin 79 parallel with axle sleeve axis protrudes into simultaneously
In the short pin hole opened on two nuts；The back side of two nuts is two rotating seats 77 respectively；Rotating seat 77 and axle sleeve exist
It slides axially and is connected circumferentially positioned.
The both ends that axle sleeve stretches out end cap open up U-shaped mouth 21,23 of the own centre line on same bus, are corresponding to U-shaped mouth
Trundle 8 has been connected by screw on main shaft 1 at 23.
Force sensor 9 is pasted on trundle side wall corresponding with U-shaped mouth side wall, for detecting U-shaped mouth side wall and passing
The size of peripheral force between dynamic pin.Force snesor 9 uses FLEXIFORCE A310 piezoelectric film sensor, which passes
Sensor has more preferable linear, drift, magnetic hysteresis, temperature sensitivity compared to other piezoelectric film sensors, and cost performance is higher.
The detection data of force snesor 9 is transmitted to signal condition amplifying circuit.
Signal processing and transmitting module by signal condition amplifying circuit, with the 3.3V low-voltage and low-power dissipation of A/D conversion function
The composition such as single-chip microcontroller STC12LE5608AD, wireless transmitter module NRF24L01, self-powered module.Wireless transmitter module is by signal
Improve the composition such as amplifying circuit, low-power consumption RF device, antenna.Self-powered module is signal condition amplifying circuit, single-chip microcontroller, wireless
The power supply such as transmitting module.The surveyed physical quantity of FLEXIFORCE A310 piezoelectric film sensor is converted by signal condition amplifying circuit
At analog signals, digital signal is changed by Chip Microcomputer A/D conversion circuit, is most transmitted afterwards through wireless transmitter module.Single-chip microcontroller
STC12LE5608AD is identical as wireless sending module NRF24L01 supply voltage.Self-powered module is tried with mechanical sealing performance
The operating tested and start power generation, power to each functional unit at wireless signal transmission end.
Charge variation is generated by stress inside piezoelectric film sensor FLEXIFORCE A310 to put through signal amplification conditioning
Output voltage signal after big circuit, the A/D converter circuit carried through STC12LE5608AD single-chip microcontroller are converted by analog signals
Digital signal, then wireless data transmission is carried out by wireless transport module NRF24L01.
NRF24L01 be by NORDIC production work 2.4GHz~2.5GHz ISM band monolithic wireless transceiver
Chip.Have the advantage that output power channel selection and the setting of agreement can be directly configured by SPI interface；Almost
It may be coupled to various singlechip chips, and complete Wireless data transmission work；Extremely low current drain.
It is illustrated in figure 7 the workflow of wireless transport module NRF24L01: being initially located in sleep to awakening mode, this mould
Formula possesses extremely low current drain, is greatly saved power supply power supply amount；After data enter, wireless transport module NRF24L01
Normal mode of operation is switched to by sleep pattern, transmits 8 significant characters and check bit；It is attributed to again when check bit end of transmission
Sleep pattern waits next group of data to enter.
Signal receives and processing module is arranged outside seal chamber, it includes wireless receiving module NRF24L01, low-power consumption
Single-chip microcontroller, host computer, Labview data processing and display unit etc..Wireless sending module is received by wireless receiving module to send
Signal, after conditioning after send to single-chip microcontroller, be finally transmitted to host computer through serial ports by single-chip microcontroller, then send to Labview data
Reason and display unit carry out data processing, real-time display, printing preservation.Data receiver by 5V power supply be wireless receiving mould
The power supply such as block, low-power scm.
Labview processing and display unit use Development of Modular integration mode, real-time by serial ports input submodule, data
Display sub-module, data processing (curve matching) submodule, real time data preservation and report generation submodule remotely monitor submodule
Block composition；Data enter Labview processing display unit through serial ports input module, and data processing module carries out friction torque data
It is shown through data real-time display module in host computer interface after curve matching；Processed data save in the form of statements simultaneously
In upper computer end.
It is circumferentially provided with annular groove on main shaft between the both ends and axle sleeve of main shaft, uniformly places 3 or 3 or more respectively and rolls
Pearl 3.The friction torque of main shaft and shaft room is rolling friction torque, reduces friction, almost relative to end face friction torque
It is negligible, so that dynamic and static ring friction torque is almost passed to main shaft by axle sleeve without loss, according to mechanical seal
The principle that dynamic and static ring is balanced each other due to the torque and main shaft of end face friction generation by the torque that trundle passes to axle sleeve, will
Paste the peripheral force that the piezoelectric transducer on trundle the is measured end face friction torque that is multiplied that you can get it with the arm of force of force-detecting position.
There are two types of self-powered modules, and one is the confessions that the principle that electromotive force is generated based on coil cutting magnetic line is designed
Electric module, referring to Fig. 1-3；One is based on direct piezoelectric effect, that is, piezoelectric chip, its surface will appear opposed polarity electricity under stress
The self-powered module of the principle design of lotus, referring to Fig. 3-5.
Referring to Fig. 1-3, and it includes solid for generating the self-powered module of the principle design of electromotive force based on coil cutting magnetic line
Coil windings 102, rectification circuit 103 and the voltage regulator circuit 104 for being scheduled on the magnet 101 to leak hunting on chamber end cap, main shaft being followed to rotate,
The main part of coil windings 102 is extend into magnet 101, and the output end of coil windings is connected with rectification circuit, voltage regulator circuit.
The coil windings cutting magnetic line of rotation is sent after generating induced electromotive force to rectification circuit and voltage regulator circuit processing.Signal condition is put
Big circuit, 3.3V low-voltage and low-power dissipation single-chip microcontroller STC12LE5608AD, wireless transmitter module with A/D conversion function
NRF24L01, rectification circuit, voltage regulator circuit are both placed in placement box.Placement box is connected with axle sleeve, rotation synchronous with axle sleeve, main shaft
Turn.It only needs the trundle at U-shaped mouth being fixed on main shaft (or shedding from main shaft) by screw when installation (or disassembly)
Axle sleeve is installed into axis (or removing from axis) together with holder.According to electromagnetic induction principle, coil windings are fixed on
It follows main shaft high-speed rotation constantly to cut in placement box and is fixed on the magnet to leak hunting on chamber end cap and the magnetic field flux quantitative change generated
Change, generates induced electromotive force；The induced electromotive force of generation obtains stable supply voltage after rectified and steady pressure treatment, avoids
Because experimental period is too short caused by using general dry battery or lithium battery power supply capacitance limited, it need to frequently stop experiment disassembly dress
Replacement battery is set, the case where obtaining end face friction torque valid data can not be continued.
Referring to Fig. 3-5, designed based on the piezoelectric chip principle that its surface will appear opposed polarity charge under pressure
Self-powered module include be set to placement 6 inner wall of box two piezoelectric chips 109, two pressure blocks 108, voltage regulator circuits 104；
Signal condition amplifying circuit, the 3.3V low-voltage and low-power dissipation single-chip microcontroller STC12LE5608AD with A/D conversion function, wireless transmission
Module NRF24L01, rectification circuit are both placed in placement box.Placement box is connected with axle sleeve, with axle sleeve, main shaft synchronous rotary.With
The rotation of main shaft, piezoelectric chip is in the main shaft extruding by the centrifugal force generated from pressure block in the radial direction, inside and outside
Side forms the two poles of the earth for having positive and negative charge.After two piezoelectric chip series connection, the two poles of the earth of two piezoelectric chip positive and negative charges are connected to
Voltage regulator circuit.The output of voltage regulator circuit is respectively with signal condition amplifying circuit, with the 3.3V low-voltage and low-power dissipation of A/D conversion function
Single-chip microcontroller STC12LE5608AD, wireless transmitter module NRF24L01 are connected, and power to it.
To each component part of this technology patent carried out on the basis of not changing function corresponding equivalence replacement and this
The protection scope of item technology.
Claims (1)
1. based on the mechanical seal face friction torque measuring device of piezoelectric effect power supply, including being offered on the same bus in both ends
The axle sleeve of U-shaped mouth, the trundle being connected to across U-shaped mouth on main shaft, force snesor, signal processor, wireless transmitter module, nothing
Line receiving module, self-powered module；Main shaft passes through axle sleeve, and the mechanical seal of end face friction torque to be measured is set on axle sleeve, moves
Ring is connected on axle sleeve, and stationary ring is fixed on seal chamber；It is characterized in that: the dynamic and static ring of the mechanical seal is due to rubbing end face
The torque generated is wiped, is balanced each other with main shaft by the torque that trundle passes to axle sleeve；This torque is by pasting on trundle
The product of the arm of force of peripheral force and force-detecting position that measures of force snesor determine, the peripheral force surveyed by signal processor processes simultaneously
Wireless receiving module is transmitted to through wireless transmitter module；Using main shaft or axle sleeve rotation generate electric energy by self-powered module to
Signal processor and wireless transmitter module power supply；
The self-powered module includes piezoelectric chip, pressure block and the voltage regulator circuit for following main shaft to rotate；When piezoelectric chip exists
When the radial extruding by the pressure block rotated with main shaft, inside can generate polarization phenomena, make charged ion that relative displacement occur,
Two poles are formed to generate the opposite charge of symbol equal in magnitude on plane of crystal, are treated as stablizing through voltage regulator circuit
DC power supply；
The sleeve end is wrapped main shaft end using enclosed construction, one placement box of sleeve end connection, built-in
There are signal processor, wireless transmitter module, voltage regulator circuit, piezoelectric chip and pressure block；The periphery of piezoelectric chip sticks in peace
It sets on the inner hole wall of box, pressure block sticks on the inner sidewall of piezoelectric chip；
Circumferentially uniformly place 3 or more balls between the both ends and main shaft of the axle sleeve respectively on the cross section of axis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877966.2A CN106353024B (en) | 2015-01-15 | 2015-01-15 | Mechanical seal face friction torque measuring device based on piezoelectric effect power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510020807.6A CN104655342B (en) | 2015-01-15 | 2015-01-15 | Mechanical seal face friction torque measurement apparatus based on self-powered and wireless data transmission |
| CN201610877966.2A CN106353024B (en) | 2015-01-15 | 2015-01-15 | Mechanical seal face friction torque measuring device based on piezoelectric effect power supply |
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| CN201510020807.6A Division CN104655342B (en) | 2015-01-15 | 2015-01-15 | Mechanical seal face friction torque measurement apparatus based on self-powered and wireless data transmission |
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| CN106353024B true CN106353024B (en) | 2019-05-07 |
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| CN201610877966.2A Active CN106353024B (en) | 2015-01-15 | 2015-01-15 | Mechanical seal face friction torque measuring device based on piezoelectric effect power supply |
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| CN105424250B (en) * | 2015-11-16 | 2018-02-27 | 江苏大学 | A kind of rotating shaft instantaneous torque detection means and method |
| CN105424244B (en) * | 2015-11-19 | 2018-10-16 | 青岛理工大学 | A kind of contactless self-generating wireless torque sensor |
| CN105973512B (en) * | 2016-06-22 | 2018-09-04 | 大连理工大学 | A kind of self-generating wireless transmission piezoelectric type torque dynamometer |
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| CN104655342A (en) | 2015-05-27 |
| CN106353024A (en) | 2017-01-25 |
| CN104655342B (en) | 2017-07-14 |
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