CN105910750B - Pump installation impeller dynamic circumference vector force measuring device and method - Google Patents
Pump installation impeller dynamic circumference vector force measuring device and method Download PDFInfo
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- CN105910750B CN105910750B CN201610222518.9A CN201610222518A CN105910750B CN 105910750 B CN105910750 B CN 105910750B CN 201610222518 A CN201610222518 A CN 201610222518A CN 105910750 B CN105910750 B CN 105910750B
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- 238000009434 installation Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 14
- 239000010453 quartz Substances 0.000 claims abstract description 86
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000000126 substance Substances 0.000 claims abstract description 67
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000013461 design Methods 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims description 31
- 230000000694 effects Effects 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 230000005622 photoelectricity Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 230000004323 axial length Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/08—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
Abstract
A kind of pump installation impeller dynamic circumference vector force measuring device, including left flange plate, upper cover, pedestal and right ring flange, upper cover and pedestal are arranged between left flange plate and right ring flange after being connected with each other, piezoelectric quartz crystalline substance group is provided between upper cover and pedestal, left flange plate, upper cover, pedestal and the rigid connection of right ring flange, as an overall structure, the overall structure and pump installation main shaft synchronous rotary.The configuration of the present invention is simple, dynamic characteristic be good, high sensitivity, solves the measurement problem of pump installation impeller dynamic circumference vectorial force, for the practical radial force state for further appreciating that pump installation impeller, the safety and reliability for improving pump installation design provides reference frame.
Description
Technical field:
The present invention relates to a kind of pump installation impeller dynamic circumference vector force measuring device and method, belong to and pump class fluid machine
Tool impeller internal waterpower radial load measures relevant technical field.
Background technique:
The stability that the work of class fluid machinery is pumped in fields such as petrochemical industry, defence and military, nuclear powers and safety are to Guan Chong
It wants.When fluid machine blade wheel works, since the structure and impeller internal complex flowfield of pump case cause impeller to generate radial force, the diameter
Pump shaft is acted on by alternate stress to power, to generate the amount of deflection of orientation, directly influences the job stability of pump shaft.Together
When, since the effect of radial force can make axle envelope gap become unevenly, to will lead to pump installation leakage when serious.Therefore, it is filled in pump
The radial force that timing is generated for impeller is installed to account for being very necessary.
Currently, the radial force size of research pump installation impeller mainly uses the sides such as empirical equation, numerical simulation, experiment measurement
Method.It is still to be improved for the prediction accuracy specifically pumped although empirical equation comparison of computational results is reliable.Impeller exists
Simulating analysis based on declared working condition lower stress has obtained good application, but under complex flowfield such as pump installation
Instantaneous action power under start and stop, small flow and variable working condition is that the Unsteady Flow Calculation of impeller brings sizable difficulty.
The previous measurement for pump installation impeller force in radial uses the measurement method based on strain-type, i.e., with foil gauge
As force sensing element, strain gauge adhesion is measured on testing elastic element.Due to fluid inertia and instantaneous acceleration pair
The transient impact of impeller acts on, and impeller internal flow shows strong unsteady during the starting of pump installation, small flow etc.
Property and transient effect.Meanwhile impeller is by cavitation in working media, stream Induced Oscillation, and since the sound of impeller and guide vane is dry
The high frequencies impact loading such as pressure fluctuation caused by relating to.Therefore, using elastic element stress deformation occurs measuring principle, nothing
Method meets high rigidity, high sensitivity, the testing requirement of high frequency sound.
Summary of the invention:
Goal of the invention:
The present invention provides a kind of pump installation impeller dynamic circumference vector force measuring device and method, the purpose is to solve with
The problems of toward.
Technical solution:
A kind of pump installation impeller dynamic circumference vector force measuring device, including left flange plate, upper cover, pedestal and right flange
Disk, upper cover and pedestal are arranged between left flange plate and right ring flange after being connected with each other, it is characterised in that: in upper cover and pedestal
Between be provided with piezoelectric quartz crystalline substance group, left flange plate, upper cover, pedestal and the rigid connection of right ring flange become an overall structure,
The overall structure and pump installation main shaft synchronous rotary.
Piezoelectric quartz crystalline substance group is yx cut type piezoelectric quartz crystalline substance group, it makes use of the shearing effect of quartz crystal, each piezoelectricity
Quartz-crystal group is made of two piezoelectric quartz crystals.
It is provided on upper lid with reeded round boss, piezoelectric quartz crystalline substance group is embedded in groove, and the depth of groove is pressure
The thickness of electric quartz-crystal group, so that the exposed surface of piezoelectric quartz crystalline substance group maintains an equal level with boss surface and is bonded with pedestal.
It is fastenedly connected between upper cover and pedestal using pretension bolt, while pretension bolt passes through the thin-walled cylinder and pressure of upper cover
The through-hole of electric quartz-crystal group；The axial length of thin-walled cylinder is identical as depth of groove, therefore piezoelectric quartz crystalline substance group is in relatively close
In the space closed, prevent from being contaminated and bringing measurement error.
The center of groove is overlapped with the center in the pretension bolt hole that pretension bolt passes through, and thin-walled cylinder is arranged in groove
Center is provided with the face that main shaft is installed in left flange plate and right ring flange and merges with main shaft matching for guaranteeing pump main shaft
With the outer concave mouth of measuring device concentricity, it is provided with and is used for the face that upper cover is connect with pedestal in left flange plate and right ring flange
It blocks upper cover and pedestal and then guarantees the interior concave mouth of left flange plate, upper cover, pedestal and right ring flange concentricity.
The piezoelectric quartz crystalline substance group is arranged four altogether；Each piezoelectric quartz crystalline substance group is by two panels with the yx cut type of rotation direction quartz crystal
Quartz wafer is formed in parallel, and four piezoelectric quartz crystalline substance groups use the orthogonal arrangement in peak response direction.
Left flange plate, upper cover, pedestal, right ring flange and piezoelectric quartz crystalline substance group form measuring device, during which is
Heart symmetrical structure, external whole presentation disc-shape, exterior design size can change with the size of pump main shaft；The court of upper cover
Cover rim boss is extended to form to piezoelectric quartz crystalline substance group direction along axial direction to the circumferential edges on the surface of piezoelectric quartz crystalline substance group, is used
It is arranged in the range of cover rim boss is crowded around and during the boss with the upper cover center of circle is the boss of piezoelectric quartz crystalline substance group is arranged
The heart is uniformly distributed, and is respectively designed with threading hole in the radial direction in the side wall of boss sum, that there are wirings between two boss is empty
Between, so that the signal wire of four piezoelectric quartz crystalline substance groups is drawn outward by threading hole.
The measuring device further includes photoelectric whirl encoder；It is equipped with mark line outside the measuring device, with the mark line
0 ° of initial position when as measuring device static demarcating, then by measuring device rotate certain ladder angle carry out 360 ° of circumference it is quiet
State calibration, establishes the output signal relationship of each angle and four piezoelectric quartz crystalline substance groups within the scope of 0 ° to 360 °, mark line and photoelectricity
Rotating speed coder is used cooperatively, and when which passes through photoelectric whirl encoder, the signal of record photoelectricity rotating speed coder becomes
Change.
The pump installation impeller dynamic circumference implemented using above-mentioned pump installation impeller dynamic circumference vector force measuring device
Vector force measuring method, it is characterised in that: measuring device is mounted between two disconnected main shafts of pump installation, it is fixed by outer concave mouth
Position guarantees the concentricity of measuring device and main shaft, by outer-hexagonal bolt that left flange plate, upper cover, pedestal and right ring flange is rigid
Connection makes measuring device axial, radial without relative displacement；When tested pump installation impeller work, impeller is by waterpower diameter
It is acted on to load, piezoelectric quartz crystalline substance group passes through letter due to being generated charge by the radial forces inside measuring device at this time
Number line is transmitted to charge amplifier, is transmitted in data acquisition module after signal amplifies, after amplification, A/D conversion
To radial force size to be measured；Meanwhile photoelectric encoder signal is also sent in data acquisition module, is calculated by numerical value,
Obtain the direction of radial force.
Shown in the calculation method such as formula (1) of pump installation impeller dynamic circumference vectorial force:
In formula (1), SrFor the size of radial force value, S1、S2、S3、S4Respectively quartz-crystal group L1、L2、L3、L4Output letter
Number, θ is the angle where instantaneous moment radial force and quartz-crystal group between plane coordinate system x-axis；
One mark line of outer ring design of measuring device, mark line are 0 ° of angle of plane coordinate system x-axis where quartz-crystal group
Direction determines x-axis instantaneous moment position in pump installation main shaft rotary course using photoelectric whirl encoder, to calculate impeller
Space vector power of the radial force relative to pump installation.
Advantage and effect: the characteristic in order to study radial force under impeller full working scope, improve pump installation design reliability and
Safety, this paper presents a kind of pump installation impeller dynamic circumference vector force measuring device and method,
Advantages of the present invention and good effect are as follows:
1. measurement method of the invention realizes high rigidity connection by left and right ring flange, upper cover and four part of pedestal, utilize
Conducting slip ring exports the radial force signal of measuring device outward.Measuring device passes through left and right ring flange for the left and right two of pump installation
Root off-axis positions and realizes rigid connection.Therefore, two measuring device, left and right off-axises are integrally formed.
2. the outer ring design of measuring device of the invention has a mark line to encode when pump installation works using photoelectric whirl
Device acquires the mark line by photoelectric whirl code device signal state, to obtain radial force signal and measuring device rotation angle
Between corresponding relationship.
3. the shearing effect of piezoelectric quartz crystal is utilized in measuring device of the invention, inside is by four yx cut type piezoelectricity stones
Ying Jing group is constituted, and each piezoelectric quartz crystalline substance group is formed in parallel by two panels with the yx chip of rotation direction quartz crystal.
4. measuring device dynamometry broad quantum of the invention, high sensitivity, dynamic characteristic is good, and nonlinearity erron and repeatability are accidentally
Difference is small, solves the problems, such as the measurement of circumference of impeller vectorial force.
In conclusion piezoelectric quartz crystalline substance group signal of the invention is drawn outward by conducting slip ring, charge amplifier is accessed
And data acquisition module.The radial force size of impeller is directly measured by measuring device, passes through theoretical calculation analysis and photoelectric whirl
Encoder auxiliary signal obtains the direction of radial force.The configuration of the present invention is simple, dynamic characteristic be good, high sensitivity, solves pump dress
The measurement problem of impeller dynamic circumference vectorial force is set, for the practical radial force state for further appreciating that pump installation impeller, is improved
The safety and reliability of pump installation design provides reference frame.
Detailed description of the invention
Fig. 1 shows an overall structure diagrams；
Fig. 2 is internal structure cross-sectional view；
Wherein: 1 is left flange plate, and 2 be upper cover, and 3 be pedestal, and 4 be right ring flange, and 5 be photoelectric whirl encoder, and A is logical
Hole, B are outer concave mouth, and C pretension bolt hole, D is screwde on hole, and E is pretension bolt, and F is groove, and G is boss, and H is through-hole,
I is outer-hexagonal bolt, and J is hex nut, and K is through-hole, and L is quartz-crystal group, and M is threaded hole, and N is thin-walled cylinder, and O is piezoelectricity stone
Ying Jing group through-hole, P are boss, and Q is interior concave mouth.
Specific embodiment:
Following further describes the present invention with reference to the drawings:
Proposed by the present invention is a kind of pump installation impeller dynamic circumference vector force measuring device, including left flange plate 1, upper cover
2, pedestal 3 and right ring flange 4, upper cover 2 and pedestal 3 are arranged after being connected with each other by pretension bolt E in left flange plate 1 and right method
Between blue disk 4, it is characterised in that: be provided with piezoelectric quartz crystalline substance group L between upper cover 2 and pedestal 3, wherein left and right flange dish type
Shape is identical, structure mirror symmetry, and design has through-hole A, outer concave mouth B and interior concave mouth Q, screwde on hole D；Upper cover 2, pedestal 3
It is respectively equipped with pretension bolt hole C and threaded hole M, left flange plate 1, upper cover 2, pedestal 3 and right ring flange 4 pass through outer-hexagonal bolt I
Rigid connection becomes an overall structure, the overall structure and pump installation main shaft synchronous rotary.
Piezoelectric quartz crystalline substance group L is yx cut type piezoelectric quartz crystalline substance group, it makes use of the shearing effect of quartz crystal, each piezoelectricity
Quartz-crystal group L is made of two piezoelectric quartz crystal plates, is mutually hung down between four piezoelectric quartz crystalline substance groups using peak response direction
Straight arrangement.
Piezoelectric quartz crystalline substance group L is formed using two panels yx cut type piezoelectric quartz crystal plate, the thickness direction of yx cut type quartz wafer
Parallel with the y-axis of quartz crystal, wafer face is vertical with y-axis.The shearing effect of quartz crystal, i.e. impeller is utilized in the cut type mode
In circumference in the radial direction by active force when, according to piezoelectric effect principle, the surface of quartz-crystal group generates charge, and impeller
Axially loaded does not interfere with radial measurement result.
The boss G with fluted F is provided in upper cover 2, piezoelectric quartz crystalline substance group L is embedded in groove F, and the depth of groove is stone
The thickness of Ying Jing group, so that piezoelectric quartz crystalline substance group L exposed surface maintains an equal level with the surface boss G and is bonded with pedestal 3.
It is fastenedly connected between upper cover 2 and pedestal 3 using pretension bolt E, while pretension bolt passes through the thin-walled cylinder N of upper cover
With the through-hole O of piezoelectric quartz crystalline substance group L；The axial length of thin-walled cylinder is identical as groove F depth.
The center of groove F is overlapped with the center for the pretension bolt hole C that pretension bolt passes through, and thin-walled cylinder N is arranged in groove F
Center, be provided in left flange plate 1 and right ring flange 4 with the face that main shaft is installed and merge with main shaft matching for guaranteeing to pump
The outer concave mouth B of main shaft and measuring device concentricity, in the face that left flange plate 1 and right ring flange 4 are connect with upper cover 2 with pedestal 3
It is provided with for blocking in upper cover 2 and pedestal 3 and then guarantee left flange plate 1,4 concentricity of upper cover 2, pedestal 3 and right ring flange
Concave mouth Q.
Piezoelectric quartz crystalline substance group L is arranged four altogether；Each piezoelectric quartz crystalline substance group L is cut by two panels with the yx of rotation direction quartz crystal
Type chip is formed in parallel.
Left flange plate 1, upper cover 2, pedestal 3, right ring flange 4 and piezoelectric quartz crystalline substance group L form measuring device, the measuring device
For center symmetrical structure, external whole presentation disc-shape, exterior design size can change with the size of pump main shaft；On
The circumferential edges on the surface towards piezoelectric quartz crystalline substance group L of lid 2 extend to form upper cover side to the direction piezoelectric quartz crystalline substance group L along axial direction
Edge boss P is arranged in the range of cover rim boss P is crowded around and boss G for the boss G of piezoelectric quartz crystalline substance group L is arranged
It is uniformly distributed centered on the upper cover center of circle.
The measuring device further includes photoelectric whirl encoder 5；It is equipped with mark line 6 outside the measuring device, the mark line
The x-axis direction of plane coordinate system where four piezoelectric quartz crystalline substance groups is as measuring device radial force when for measuring device static demarcating
0 ° of initial position of output；The mark line 6 is used cooperatively with photoelectric whirl encoder 5, which encodes by photoelectric whirl
When device 5, the signal intensity of photoelectricity rotating speed coder is recorded.
The outer-hexagonal bolt quantity is eight, is uniformly distributed using measuring device center as the center of circle.Inside measuring device
If the shearing effect of quartz crystal is utilized, each quartz-crystal group L is using maximum spirit there are four yx cut type piezoelectric quartz crystalline substance group L
The orthogonal arrangement in sensitivity direction, the design of piezoelectric quartz crystalline substance group have through-hole O, pass through thin-walled cylinder N, and the circle of upper cover is convex
Platform G, groove F, the plane of pedestal, the upper and lower surface of piezoelectric quartz crystalline substance group are bonded completely.
The upper cover circumferential edges boss P and round boss G has a threading hole, each piezoelectric quartz crystalline substance group it is defeated
Signal wire is drawn outward by the threading hole out.
As shown in Figure 1 and Figure 2, circumference of impeller vectorial force of the invention measurement is using the installation measurement on the main shaft of pump installation
The method of device realizes that the main shaft of pump installation is designed using off-axis mode, wherein an axis both ends are separately connected left flange plate 1
With driving motor, another axis both ends are separately connected the impeller of right ring flange 4 and pump installation.The both ends of left and right ring flange are set respectively
Be calculated as seam allowance connection type for guarantee pump main shaft and measuring device concentricity.Left flange plate 1, upper cover 2, pedestal 3, right ring flange
4 constitute an overall structure with main shaft rigid connection, when pump installation works, the overall structure and impeller synchronous rotary.
The radial direction design at the edge round boss G has threading hole.Pedestal 3 is designed as plane disc structure, is uniformly distributed
There are four threaded hole M, when upper cover 2 and pedestal 3 assemble, pretension bolt hole C and threaded hole M are corresponded.
Four piezoelectric quartz crystalline substance group L are designed as central through hole structure, and when encapsulation, the central through hole of quartz-crystal group L is covered
On thin-walled cylinder N, and the peak response direction of piezoelectric quartz crystalline substance group is mutually perpendicular to place.By the signal wire of quartz-crystal group from
The threading hole of round boss G is drawn, and the boss P by upper cover 2 is drawn outward, is filled by that can complete on calibration console to measurement
The static demarcating set obtains circumference radial force and applies between the size and Orientation and four piezoelectric quartz crystalline substance group output signals of load
Linear relationship.The depth of parallelism of the end face plane of boss P, the boss G and pedestal 3 of upper cover 2 is 0.01, roughness 0.4.Four
The flatness of groove F plane where piezoelectric quartz crystalline substance group is 0.02.Thin-walled cylinder N, piezoelectric quartz crystalline substance group L end face in same water
Plane passes through pretension bolt E1-4Realization is closely connect with 3 plane of pedestal.
Pump installation impeller dynamic circumference vector force measuring method, by measuring device be mounted on two disconnected main shafts of pump installation it
Between, by the concentricity of outer concave mouth B position assurance measuring device and main shaft, by outer-hexagonal bolt I by left flange plate 1, on
Lid 2, pedestal 3 and right ring flange 4 are rigidly connected, and make measuring device axial, radial without relative displacement；When tested pump installation leaf
When taking turns work, impeller is by waterpower Radial Loads, so that piezoelectric quartz crystalline substance group is by radial forces inside measuring device
And charge is generated, charge amplifier is transmitted to by signal wire, is transmitted in data acquisition module after signal amplifies, is passed through
Radial force size to be measured is obtained after amplification, A/D conversion；Meanwhile photoelectric encoder signal is also sent to data acquisition module
In, it is calculated by numerical value, obtains the direction of radial force.
Shown in the calculation method such as formula (1) of pump installation dynamic circumference vectorial force.
In formula (1), SrFor the size of radial force value, S1、S2、S3、S4Respectively quartz-crystal group L1、L2、L3、L4Output letter
Number, θ is the angle where instantaneous moment radial force and piezoelectric quartz crystalline substance group between plane coordinate system x-axis.
One mark line of outer ring design of measuring device, the mark line position is as shown in Figure 1, mark line is piezoelectricity stone
0 ° of position of plane coordinate system x-axis direction, determines x in pump installation main shaft rotary course using photoelectric whirl encoder where Ying Jing group
Axis instantaneous moment position, to calculate space vector power of the impeller radial force relative to pump installation.
The output signal of measuring device is connect with the conducting slip ring inner ring being mounted on pump installation main shaft, outside conducting slip ring
Ring is fixedly connected with pump installation shell, and outer ring output signal is transmitted in data acquisition module after charge amplifier amplifies, will
The data acquisition module is connected to computer, and the real-time aobvious of impeller radial force is carried out in software corresponding with data acquisition module
Show, analyze, handle and saves.
The present invention, as force sensing element, forms pump dress by left and right ring flange, upper cover and pedestal using piezoelectric quartz crystalline substance group
Impeller motion vector force test system is set, this method structure is simple and convenient to operate, and solves current pump installation impeller dynamic circumference
The measurement problem of vectorial force improves the peace of pump installation design for the practical radial force state for further appreciating that pump installation impeller
Full property and reliability provide reference frame.
Claims (6)
1. a kind of pump installation impeller dynamic circumference vector force measuring device, including left flange plate (1), upper cover (2), pedestal (3) and
Right ring flange (4), upper cover (2) and pedestal (3) are arranged between left flange plate (1) and right ring flange (4) after being connected with each other,
It is characterized in that: being provided with piezoelectric quartz crystalline substance group (L), left flange plate (1), upper cover (2), pedestal between upper cover (2) and pedestal (3)
(3) it is rigidly connected with right ring flange (4), becomes an overall structure, the overall structure and pump installation main shaft synchronous rotary；
Piezoelectric quartz crystalline substance group (L) is yx cut type piezoelectric quartz crystalline substance group, it makes use of the shearing effect of quartz crystal, each piezoelectricity stone
Ying Jing group (L) is made of two piezoelectric quartz crystals；
The round boss (G) with fluted (F) is provided in upper cover (2), piezoelectric quartz crystalline substance group (L) is embedded in groove (F), groove
Depth be piezoelectric quartz crystalline substance group thickness so that the exposed surface of piezoelectric quartz crystalline substance group (L) and the round boss surface (G) maintain an equal level
And it is bonded with pedestal (3)；
Left flange plate (1), upper cover (2), pedestal (3), right ring flange (4) and piezoelectric quartz crystalline substance group (L) form measuring device, the survey
Amount device is center symmetrical structure, and external whole presentation disc-shape, exterior design size can change with the size of pump main shaft
Become；The circumferential edges on the surface towards piezoelectric quartz crystalline substance group (L) of upper cover (2) prolong along axial direction to the direction piezoelectric quartz crystalline substance group (L)
It stretches to form cover rim boss (P), be arranged for the round boss (G) of piezoelectric quartz crystalline substance group (L) is arranged in cover rim boss
(P) in the range of crowding around and the round boss (G) is uniformly distributed centered on the upper cover center of circle, on round boss (G) and upper cover side
The side wall of edge boss (P) is respectively designed with threading hole in the radial direction, and there are wiring spaces between two boss, thus four
The signal wire of piezoelectric quartz crystalline substance group is drawn outward by threading hole；
The measuring device further includes photoelectric whirl encoder (5)；Mark line (6) are equipped with outside the measuring device, with the label
Then measuring device is rotated certain ladder angle and carries out circumference by 0 ° of initial position when line (6) is used as measuring device static demarcating
360 ° of static demarcatings establish the output signal relationship of each angle and four piezoelectric quartz crystalline substance groups within the scope of 0 ° to 360 °, mark line
(6) it is used cooperatively with photoelectric whirl encoder (5), when which passes through photoelectric whirl encoder (5), records photoelectricity
The signal intensity of rotating speed coder.
2. pump installation impeller dynamic circumference vector force measuring device according to claim 1, it is characterised in that: upper cover (2)
It is fastenedly connected between pedestal (3) using pretension bolt (E), while pretension bolt passes through the thin-walled cylinder (N) and piezoelectricity of upper cover
The through-hole (O) of quartz-crystal group (L)；The axial length of thin-walled cylinder is identical as groove (F) depth, therefore piezoelectric quartz crystalline substance group (L)
In relatively closed space, prevent from being contaminated and bringing measurement error.
3. pump installation impeller dynamic circumference vector force measuring device according to claim 2, it is characterised in that: groove (F)
The center in pretension bolt hole (C) that passes through of center and pretension bolt be overlapped, thin-walled cylinder (N) is arranged in groove (F)
Heart position is provided with the face that main shaft is installed in left flange plate (1) and right ring flange (4) and merges with main shaft matching for guaranteeing pump
The outer concave mouth (B) of main shaft and measuring device concentricity, in left flange plate (1) and right ring flange (4) and upper cover (2) and pedestal
(3) face connected is provided with for blocking upper cover (2) and pedestal (3) and then guaranteeing left flange plate (1), upper cover (2), pedestal (3)
With the interior concave mouth (Q) of right ring flange (4) concentricity.
4. pump installation impeller dynamic circumference vector force measuring device according to claim 1, it is characterised in that: the piezoelectricity stone
Ying Jing group (L) is arranged four altogether, and four piezoelectric quartz crystalline substance groups are respectively the first piezoelectric quartz crystalline substance group (L1), the second piezoelectric quartz it is brilliant
Group (L2), third piezoelectric quartz crystalline substance group (L3) and the 4th piezoelectric quartz crystalline substance group (L4)；Each piezoelectric quartz crystalline substance group is by the same rotation direction of two panels
The yx cut type quartz wafer of quartz crystal is formed in parallel, and four piezoelectric quartz crystalline substance groups are orthogonal using peak response direction
Arrangement.
5. dynamic using the pump installation impeller that pump installation impeller dynamic circumference vector force measuring device as claimed in claim 4 is implemented
State circumference vector force measuring method, it is characterised in that: measuring device is mounted between two disconnected main shafts of pump installation, by outer recessed
The concentricity of seam allowance (B) position assurance measuring device and main shaft, by outer-hexagonal bolt (I) by left flange plate (1), upper cover (2),
Pedestal (3) and right ring flange (4) rigid connection make measuring device axial, radial without relative displacement；When tested pump installation leaf
When taking turns work, impeller is by waterpower Radial Loads, and measuring device inside piezoelectric quartz crystalline substance group is due to by the radial direction at this time
Active force and generate charge, charge amplifier is transmitted to by signal wire, is transmitted to data acquisition module after signal amplifies
In, radial force size to be measured is obtained after amplification, A/D conversion；Meanwhile photoelectric encoder signal is also sent to data and adopts
Collect in module, is calculated by numerical value, obtain the direction of radial force.
6. pump installation impeller dynamic circumference vector force measuring method according to claim 5, it is characterised in that: pump installation leaf
Shown in the calculation method such as formula (1) for taking turns dynamic circumference vectorial force:
In formula (1), SrFor the size of radial force value, S1、S2、S3、S4Respectively four piezoelectric quartz crystalline substance group (L1、L2、L3、L4)
Output signal, θ are the angle where instantaneous moment radial force and quartz-crystal group between plane coordinate system x-axis；
One mark line of outer ring design of measuring device, mark line are 0 ° of direction of plane coordinate system x-axis angle where quartz-crystal group,
X-axis instantaneous moment position in pump installation main shaft rotary course is determined using photoelectric whirl encoder, to calculate impeller radial direction
Space vector power of the power relative to pump installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN100480653C (en) * | 2007-11-01 | 2009-04-22 | 大连理工大学 | Large value piezoelectric quartz multi-component force sensor |
| CN101650243B (en) * | 2009-07-16 | 2011-01-05 | 大连理工大学 | Piezoelectric type device for measuring drilling force of deep hole |
| DE102010034877A1 (en) * | 2009-08-23 | 2011-02-24 | GIF Gesellschaft für Industrieforschung mbH | Torque measuring device and arrangement of a torque measuring device and a drive shaft |
| CN101793574B (en) * | 2010-03-17 | 2011-09-14 | 大连理工大学 | Piezoelectric type six-dimensional force sensor with adjustable load sharing ratio and test method thereof |
| CN202153166U (en) * | 2011-07-28 | 2012-02-29 | 济南大学 | Parallel piezoelectric six-dimensional powerful force sensor |
| CN203191135U (en) * | 2013-04-10 | 2013-09-11 | 济南大学 | Spoke-type parallel piezoelectric six-dimensional force sensor |
| CN103196594B (en) * | 2013-04-10 | 2015-09-09 | 济南大学 | A kind of spoke type parallel piezoelectricity six-dimensional force sensor and measuring method |
| CN105203242A (en) * | 2014-06-15 | 2015-12-30 | 吴燕珊 | Torque measuring device |
| CN105043608A (en) * | 2015-07-13 | 2015-11-11 | 大连理工大学 | High thrust and variable thrust vector measuring device |
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