CN216343098U - Piezoelectric motor displacement control device - Google Patents
Piezoelectric motor displacement control device Download PDFInfo
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- CN216343098U CN216343098U CN202120837631.4U CN202120837631U CN216343098U CN 216343098 U CN216343098 U CN 216343098U CN 202120837631 U CN202120837631 U CN 202120837631U CN 216343098 U CN216343098 U CN 216343098U
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- piezoelectric
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- valve body
- motor
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 59
- 238000010248 power generation Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
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Abstract
The utility model discloses a piezoelectric motor displacement control device which comprises a piezoelectric valve I and a piezoelectric valve II, wherein the piezoelectric valve I and the piezoelectric valve II are connected with a variable displacement motor through an air cylinder, and the variable displacement motor is connected with an angular displacement sensor. The utility model solves the problems of unstable power generation frequency and high maintenance cost of the existing power generation device.
Description
Technical Field
The utility model belongs to the technical field of underwater power generation, and relates to a piezoelectric motor displacement control device.
Background
The water flow energy as new energy refers to the kinetic energy of river and seawater flow. As a country with relatively abundant water resources, China uses new energy as much as possible, strives to promote and develop renewable energy, and can effectively change the pressure on the aspects of economy and environment caused by coal serving as main energy in China.
At present, the autonomous research and development capability of China in the aspect of hydropower technology is still insufficient, the autonomous research and development pace of developed countries cannot be kept up with, the autonomous research and development power is insufficient, and a power generation device has a plurality of defects which are mainly shown as follows: firstly, the existing water flow power generation device can obtain water energy under the condition that the water speed stably flows, and can not stably and continuously generate power under the conditions that the water speed is unstable and the direction is disordered; secondly, the current variable speed constant frequency technology can generate a large amount of harmonic waves, the influence on a power grid is large, and the stability of the power generation frequency is seriously influenced; finally, the whole device is underwater, so that the device is not easy to install and maintain, and the cost is increased. Therefore, the improvement of the existing facilities has great practical significance and long-term value.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a piezoelectric motor displacement control device, which solves the problems of unstable power generation frequency and high maintenance cost of the conventional power generation device.
The technical scheme adopted by the utility model is that the piezoelectric motor displacement control device comprises a piezoelectric valve I and a piezoelectric valve II, wherein the piezoelectric valve I and the piezoelectric valve II are connected with a variable displacement motor through an air cylinder, and the variable displacement motor is connected with an angular displacement sensor.
The utility model is also characterized in that:
piezoelectric valve I includes valve body I, and valve body I is inside to have seted up air guide groove I, is equipped with piezoelectric patches I along air guide groove I's length direction, and the upper end both sides are equipped with air inlet I and gas vent I respectively relatively, and valve body I's lower extreme one side is equipped with work mouth I.
The piezoelectric patch I is connected to the valve body I through a flexible hinge I.
Piezoelectric valve II includes valve body II, and valve body II is inside to have seted up air guide groove II, is equipped with piezoelectric patches II along air guide groove II's length direction, and valve body II's the relative both sides in upper end are equipped with air inlet II and gas vent II respectively, and valve body II's lower extreme one side is equipped with work mouth II.
The piezoelectric patch II is connected to the valve body II through a flexible hinge II.
The working port I of the piezoelectric valve I is connected with a rod cavity of the cylinder, the working port II of the piezoelectric valve II is connected with a rodless cavity of the cylinder, and a piston rod of the cylinder is connected with the variable displacement motor.
The utility model has the advantages that the control method that the position of the piston rod of the cylinder is controlled by the pair of piezoelectric valves so as to adjust the displacement of the variable motor is adopted, the controller outputs driving voltage to adjust the movement of the piezoelectric sheets in the two piezoelectric valves, so that the two cavities of the cylinder are sequentially ventilated, the piston rod is pushed to transmit the displacement to be adjusted to the swash plate of the variable motor, the zero displacement direction of the piston rod is detected by the angular displacement sensor and fed back to the controller to be compared with the set parameters, and the operation is repeated, so that the control of the displacement of the variable motor is realized, the output rotating speed fluctuation range of the variable motor is smaller by adjusting the displacement of the variable motor, the rotating speed of the motor is controlled at about 1500r/min, and the output rotating speed of the motor is ensured to be stable. In addition, the device has simple structure, convenient maintenance and low cost.
Drawings
FIG. 1 is a schematic diagram of a piezoelectric motor displacement control device according to the present invention;
fig. 2 is a schematic diagram of the working state of the displacement control device of the piezoelectric motor according to the utility model.
In the figure, 1, a valve body I, 2, a flexible hinge I, 3, an exhaust port I, 4, a piezoelectric plate I, 5, an air inlet I, 6, a working port I, 7, an air cylinder I, 8, a variable motor, 9, an air guide groove I, 10, an angular displacement sensor, 11 and a controller are arranged;
1-1, valve body II, 2-1, flexible hinge II, 3-1, exhaust port II, 4-1, piezoelectric plate II, 5-1, air inlet II, 6-1, working port II, 7-1, air cylinder II, 9-1 and air guide groove II.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model discloses a piezoelectric motor displacement control device, which comprises a piezoelectric valve I and a piezoelectric valve II, wherein the piezoelectric valve I and the piezoelectric valve II are connected with a variable motor 8 through a cylinder 7, and the variable motor 8 is connected with an angular displacement sensor 10, as shown in figure 1.
Piezoelectric valve I includes valve body I1, and valve body I1 is inside to be seted up air guide groove I9, is equipped with piezoelectric patch I4 along air guide groove I9's length direction, and the upper end of valve body I1 is relative both sides and is equipped with air inlet I5 and gas vent I3 respectively, and valve body I1's lower extreme one side is equipped with work mouth I6. The piezoelectric patch I4 is connected to the valve body I1 through a flexible hinge I2. The flexible hinge I2 is used for changing the bending motion of the piezoelectric sheet I4 into linear motion to control the opening and closing of the air inlet I5 and the air outlet I3, and simultaneously can ensure that the air inlet I5 and the air outlet I3 have good sealing performance.
The piezoelectric valve II comprises a valve body II1-1, a gas guide groove II9-1 is formed in the valve body II1-1, a piezoelectric piece II4-1 is arranged in the length direction of the gas guide groove II9-1, the two opposite sides of the upper end of the valve body II1-1 are respectively provided with a gas inlet II5-1 and a gas outlet II3-1, and one side of the lower end of the valve body II1-1 is provided with a working port II 6-1. The piezoelectric patch II4-1 is connected to the valve body II1-1 through a flexible hinge II 2-1. The flexible hinge II2-1 is used for changing the bending motion of the piezoelectric sheet II4-1 into linear motion to control the opening and closing of the air inlet II5-1 and the air outlet II3-1, and simultaneously can ensure that the air inlet II5-1 and the air outlet II3-1 have good sealing performance.
The working port I6 of the piezoelectric valve I is connected with the rod cavity of the cylinder 7, the working port II6-1 of the piezoelectric valve II is connected with the rodless cavity of the cylinder 7, and the piston rod of the cylinder 7 is connected with the variable motor 8.
The variable motor 8 is connected with an angular displacement sensor 10, and the angular displacement sensor 10, the piezoelectric sheet II4-1 and the piezoelectric sheet I4 are all connected with a controller 11. The swash plate displacement parameters of the variable displacement motor 8 are arranged in the controller 11, and when the actual parameters fluctuate, the controller 11 generates driving voltage to control the piston rod of the cylinder 7 to extend and retract through the pair of piezoelectric valves, so that the displacement of the variable displacement motor 8 is adjusted.
The working process of the displacement control device of the piezoelectric motor comprises the following steps:
when the variable displacement motor works, the piezoelectric sheet II4-1 in the piezoelectric valve II keeps an initial position, the air inlet II5-1 is closed, the valve body II1-1 is not ventilated, the piezoelectric sheet I4 in the piezoelectric valve I generates bending motion under the inverse piezoelectric effect (see figure 2), the flexible hinge I2 is driven to move to cover the air outlet I3, the air inlet I5 is opened, the air outlet I3 is closed, air enters the valve body I1, reaches a rod cavity of the air cylinder 7 through a working port I6 along an air guide groove I9, a piston rod of the air cylinder 7 is pushed to be shortened, the inner swash plate of the variable motor 8 is controlled to move so as to adjust the displacement of the variable motor 8, the displacement value of the inner swash plate of the variable motor 8 is detected by the angular displacement sensor 10, the displacement direction of the inner swash plate leaving the zero position is judged, parameters are fed back to the piezoelectric controller 11, the input parameters are compared with the set parameters by the controller 11, and whether the variable motor 8 needs to be adjusted and the displacement of the piezoelectric sheet I4 in the piezoelectric valve I and the piezoelectric sheet II in the piezoelectric valve I4 and the piezoelectric valve II in the valve I1 outputs a driving voltage.
When the value output by the variable motor 8 through the angular displacement sensor 10 is deviated from the displacement parameter set in the controller 11, the controller 11 generates a negative direction driving voltage, so that the piezoelectric plate I4 in the piezoelectric valve I is reset, the air inlet I5 is closed, and the air in the valve body I1 is exhausted through the air outlet I3. The piezoelectric sheet II4-1 in the piezoelectric valve II generates bending motion under the inverse piezoelectric effect (see fig. 1), drives the flexible hinge II2-1 to move to cover the exhaust port II3-1, so that the air inlet II5-1 is opened, the exhaust port II3-1 is closed, the air enters the valve body II1-1, reaches the rodless cavity of the air cylinder 7 through a pipeline along the air guide groove II9-1 through the working port II6-1, pushes the piston rod of the air cylinder 7 to extend, controls the swash plate in the variable motor 8 to move so as to adjust the displacement of the variable motor 8, detects the displacement value of the swash plate in the variable motor 8 through the angular displacement sensor 10, judges the displacement direction of the swash plate, which leaves the zero position, and feeds back the parameter to the controller 11, and the controller 11 compares the input parameter with the set parameter, judges whether the displacement of the variable motor 8 needs to be adjusted and respectively outputs driving voltage to the piezoelectric sheet I4 in the piezoelectric valve I and the piezoelectric sheet II4-1 in the piezoelectric valve II.
The utility model relates to a piezoelectric motor displacement control device which is characterized in that: the control method is characterized in that the position of a piston rod of an air cylinder is controlled by a pair of piezoelectric valves to adjust the displacement of a variable motor, the controller outputs driving voltage to adjust the movement of piezoelectric sheets in the two piezoelectric valves, so that air is sequentially introduced into two cavities of the air cylinder, the piston rod is pushed to transmit the displacement to be adjusted to a swash plate of the variable motor, the zero displacement direction of the piston rod is detected by an angular displacement sensor and fed back to the controller to be compared with set parameters, the control on the displacement of the variable motor is realized, the output rotation speed fluctuation range of the variable motor is smaller by adjusting the displacement of the variable motor, the rotation speed of the motor is controlled to be about 1500r/min, and the stability of the output rotation speed of the motor is ensured.
Claims (6)
1. A piezoelectric motor displacement control apparatus, characterized by: the piezoelectric variable valve comprises a piezoelectric valve I and a piezoelectric valve II, wherein the piezoelectric valve I and the piezoelectric valve II are connected with a variable motor through a cylinder, and the variable motor is connected with an angular displacement sensor.
2. A piezoelectric motor displacement control device as claimed in claim 1, wherein: piezoelectric valve I includes valve body I, and valve body I is inside to be seted up and to lead gas groove I, is equipped with piezoelectric patches I along the length direction of leading gas groove I, and the upper end of valve body I is equipped with air inlet I and gas vent I respectively to the both sides relatively, and lower extreme one side of valve body I is equipped with work mouth I.
3. A piezoelectric motor displacement control device as claimed in claim 2, wherein: the piezoelectric piece I is connected to the valve body I through a flexible hinge I.
4. A piezoelectric motor displacement control device as claimed in claim 2, wherein: piezoelectric valve II includes valve body II, and valve body II is inside to have seted up air guide groove II, is equipped with piezoelectric patches II along air guide groove II's length direction, and valve body II's the relative both sides in upper end are equipped with air inlet II and gas vent II respectively, and valve body II's lower extreme one side is equipped with work mouth II.
5. A piezoelectric motor displacement control device as claimed in claim 4, wherein: the piezoelectric patch II is connected to the valve body II through a flexible hinge II.
6. A piezoelectric motor displacement control device as claimed in claim 5, wherein: the working port I of the piezoelectric valve I is connected with a rod cavity of the cylinder, the working port II of the piezoelectric valve II is connected with a rodless cavity of the cylinder, and a piston rod of the cylinder is connected with the variable displacement motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120837631.4U CN216343098U (en) | 2021-04-22 | 2021-04-22 | Piezoelectric motor displacement control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120837631.4U CN216343098U (en) | 2021-04-22 | 2021-04-22 | Piezoelectric motor displacement control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216343098U true CN216343098U (en) | 2022-04-19 |
Family
ID=81128162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120837631.4U Expired - Fee Related CN216343098U (en) | 2021-04-22 | 2021-04-22 | Piezoelectric motor displacement control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216343098U (en) |
-
2021
- 2021-04-22 CN CN202120837631.4U patent/CN216343098U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |