CN108131444B - Piezoelectric gear shifting control valve with self-sensing characteristic - Google Patents
Piezoelectric gear shifting control valve with self-sensing characteristic Download PDFInfo
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- CN108131444B CN108131444B CN201711499443.XA CN201711499443A CN108131444B CN 108131444 B CN108131444 B CN 108131444B CN 201711499443 A CN201711499443 A CN 201711499443A CN 108131444 B CN108131444 B CN 108131444B
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- 230000008878 coupling Effects 0.000 claims abstract description 47
- 238000010168 coupling process Methods 0.000 claims abstract description 47
- 238000005859 coupling reaction Methods 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 17
- 230000008859 change Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
- F16K31/005—Piezoelectric benders
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
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- Control Of Transmission Device (AREA)
Abstract
The present invention relates to a piezoelectric shift control valve with self-sensing feature, said control valve comprising: the hydraulic coupling valve comprises a shell, a piezoelectric actuator component, a hydraulic coupling cavity component and a valve sleeve component; the piezoelectric actuator component, the hydraulic coupling cavity assembly and the valve sleeve component are arranged in sequence from top to bottom; the piezoelectric actuator component and the valve sleeve component are respectively communicated with the upper through hole and the lower through hole of the shell. The invention has the advantages that the pressure closed-loop control of the transmission gear shifting oil filling phase and the torque phase clutch oil cylinder is realized, and the requirements of a self-sensing, high-precision and high-response gear shifting control mechanism are met.
Description
Technical Field
The invention relates to a gear shifting control mechanism of a transmission device, in particular to a piezoelectric gear shifting control valve with a self-sensing characteristic.
Background
The existing transmission device for the mainstream vehicle adopts open-loop control on gear shifting oil filling phase and torque phase, and a large number of calibration tests are required to be carried out in the early stage according to various working conditions such as different temperature changes, different abrasion degrees of friction plates, centrifugal oil pressure action and the like to obtain open-loop control MAP. Meanwhile, the vehicle transmission device has higher structure compactness and cannot be provided with a high-response pressure or displacement sensor, so that closed-loop control is difficult to realize. Therefore, a technical scheme for solving the problem that the oil filling phase and the torque phase of the vehicle transmission device cannot control the pressure of the clutch oil cylinder in a closed loop mode under the restriction of the compact structure space of the existing vehicle transmission device is needed.
Disclosure of Invention
In order to solve the above-mentioned shortcomings in the prior art, the present invention provides a piezoelectric shift control valve with a self-sensing feature.
The technical scheme provided by the invention is as follows: a piezoelectric shift control valve with a self-sensing feature, the control valve comprising: the hydraulic coupling valve comprises a shell, a piezoelectric actuator component, a hydraulic coupling cavity component and a valve sleeve component; the piezoelectric actuator component, the hydraulic coupling cavity assembly and the valve sleeve component are arranged in sequence from top to bottom;
the piezoelectric actuator component and the valve sleeve component are respectively communicated with the upper through hole and the lower through hole of the shell.
Preferably, the piezoelectric actuator component comprises: two ends of the columnar piezoelectric actuator are provided with a stop block, a columnar piezoelectric actuator provided with a shell outside and a base positioned at the bottom end of the columnar piezoelectric actuator.
Preferably, the hydraulic coupling cavity assembly is T-shaped, and includes: the T-shaped transverse part is sequentially provided with a metal diaphragm, a coupling cavity and an oil filling block from top to bottom, and the lower end of the vertical part is sleeved with a metal corrugated pipe and a valve core.
Preferably, the upper side hole of the coupling cavity is communicated with the exhaust hole plug, the lower side hole is communicated with the oil-filled check valve with the O-shaped sealing rings on two sides and the oil-filled joint on the lower side surface of the oil-filled check valve.
Preferably, the vertical part of the T-shaped structure is provided with a valve sleeve and a filter screen which are glued or in interference fit together.
Preferably, the component provided with the through hole on the shell is a rectangular mounting plate matched with the shell.
Preferably, the vertical surface of the rectangular mounting plate is provided with fixing pieces fixed on the base, and the number of the fixing pieces is 4.
Preferably, the fixing member comprises a mounting screw.
Preferably, a sliding part is arranged on the lower side of the vertical surface of the metal corrugated pipe.
Preferably, the sliding member comprises a sliding bearing.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) according to the technical scheme provided by the invention, the piezoelectric actuator component and the hydraulic coupling cavity assembly are adopted, the self-sensing function of the component is fully utilized, and the problem that a sensor cannot be installed on an operating mechanism of the existing transmission gear shifting device is solved;
(2) according to the technical scheme provided by the invention, the piezoelectric actuator is adopted, so that the responsiveness of the gear shifting control mechanism is greatly improved;
(3) according to the technical scheme provided by the invention, a pressure signal in the gear shifting control operation oil cylinder can be transmitted out without additionally installing a sensor, so that a basis for solving a fault possibly occurring in a diagnosis system is provided;
(4) the technical scheme provided by the invention has the characteristic of compact structure, and can be conveniently installed on a main stream transmission system;
(5) the technical scheme provided by the invention has a self-sensing function, so that the whole-course closed-loop control of the speed change control mechanism is realized, and the speed change control precision is also improved;
(6) therefore, the hydraulic coupling cavity can amplify the output displacement of the piezoelectric actuator.
Drawings
FIG. 1 is a schematic diagram of a piezoelectric shift control valve according to the present invention;
FIG. 2 is a schematic view of a piezoelectric shift control valve of the present invention;
FIG. 3 is a schematic diagram of the piezoelectric actuator components of the piezoelectric shift control valve of the present invention;
FIG. 4 is a schematic diagram of a hydraulic coupling cavity assembly of the piezoelectric shift control valve of the present invention;
FIG. 5 is a schematic structural view of a valve sleeve component of the piezoelectric shift control valve of the present invention;
FIG. 6 is a schematic view of a slider configuration of the piezoelectric shift control valve of the present invention;
FIG. 7 is a schematic illustration of the housing configuration of the piezoelectric shift control valve of the present invention;
FIG. 8 is a schematic view of a fixture configuration for a piezoelectric shift control valve in accordance with the present invention;
FIG. 9 is a schematic structural view of an oil charging tool for a hydraulic coupling cavity assembly of the piezoelectric shift control valve of the present invention;
wherein, 1-a piezoelectric actuator component; 2-a rectangular mounting plate; 3-a hydraulic coupling cavity assembly; 4-a valve housing component; 5-a sliding bearing; 6-a shell; 7-mounting screws; 8-a stop block; 9-a piezoelectric actuator; 10-a thin metal shell; 11-a base; 12-a metal diaphragm; 13-plugging the exhaust hole; 14-a coupling cavity; 15-oil-filled block; 16-a metal bellows; 17-a valve core; 18-oil filled check valve; 19-an oil filled joint; 20-O type sealing ring; 21-a valve housing; 22-filter screen.
Detailed Description
For a better understanding of the present invention, the technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the piezoelectric shift control valve with self-sensing feature provided by the present invention is composed of a mounting screw 7, a housing 6, a rectangular mounting plate 2, a sliding bearing 5, a valve sleeve component 4, a piezoelectric actuator component 1 and a hydraulic coupling cavity assembly 3; holes which are vertically communicated with the piezoelectric actuator component 1 and the valve sleeve component 4 are arranged above and below the shell 6; the piezoelectric actuator component 1 and the rectangular mounting plate 2 arranged on the upper hole are fixed through 4 mounting screws 7, and the piezoelectric actuator component 1 and the hydraulic coupling cavity assembly 3 are connected with the shell 6 through the rectangular mounting plate 2 on the upper side of the shell 6; the sliding bearing 5 is arranged in the corresponding vertical holes of the valve core 17 and the valve sleeve 21; the valve sleeve 4 is connected to the housing 6 by an upper external thread.
As shown in fig. 3, the piezoelectric actuator component 1 is composed of a columnar piezoelectric actuator 9 externally provided with a metal thin shell 10, two ends of the columnar piezoelectric actuator are provided with stoppers 8 and a base 11; the stoppers 8 are arranged at the upper end and the lower end of the piezoelectric actuator 9, and the base 11 is arranged at the bottom end of the piezoelectric actuator 9 and is vertical to the piezoelectric actuator 9; the thin metal shell 10 and the piezoelectric actuator base 11 are welded together, and the welding height is 3mm-5 mm.
As shown in fig. 4 and 9, the hydraulic coupling cavity assembly 3 and the oil-filled tooling structure provided by the present invention comprise a square coupling cavity 14 with round holes on the upper and lower sides, a welded metal diaphragm 12 on the upper end of the coupling cavity 14, a vent plug 13 penetrating through the round hole on the coupling cavity 14, an oil-filled block 15 arranged on one side of the lower end of the coupling cavity 14, a cylindrical metal bellows 16 vertically welded on the lower end of the coupling cavity 14 shaft, a valve core 17 positioned at the lower end of the metal bellows 16 and welded coaxially, an oil-filled check valve 18 penetrating through the round hole on the lower end of the coupling cavity 14, an oil-filled connector 19 of the shelf product penetrating through the round hole on the lower end of the coupling cavity 14 and positioned on the lower end face of the oil-filled block 15, and O-type sealing rings 20 arranged on both sides of the oil-filled check valve 18.
As shown in fig. 5, in which the sleeve member 4 is composed of a sleeve 21 and a screen 22, which are glued or interference fit together.
As shown in fig. 6, in which the shelf product slide bearing 5 has an inner diameter of 8 mm.
As shown in fig. 7, in which the housing 6 is provided with holes at the upper and lower ends thereof, the housing 6 is interconnected with the valve housing part 4 and the rectangular mounting plate 2, respectively, and the pitch of the thread in the holes is 2 mm.
As shown in fig. 8, there are 4 mounting screws provided on the base 11 of the piezoelectric actuator, and the mounting screws are socket head cap screws having a thread size of M5.
In the technical scheme of the invention, a linear corresponding relation exists between a pressure curve of the hydraulic coupling cavity and an output pressure curve of the piezoelectric gear shifting solenoid valve, the pressure of the coupling cavity 14 is transmitted to the piezoelectric actuator 9 with positive and inverse piezoelectric effects through the metal diaphragm, the pressure and the output pressure in the coupling cavity 14 are further converted into electric signals at two ends of a cable of the piezoelectric actuator, the electric signals are collected to execute decoupling of control signals, a self-sensing function is realized, and thus closed-loop control of gear shifting control pressure is realized.
(1) Assembling:
firstly, as shown in fig. 9, an oil filling joint is arranged on the lower end face of an oil filling block of the hydraulic coupling cavity, and the hydraulic coupling cavity assembly is pre-filled with oil at 0.5-1MPa according to the actual working outlet pressure. Before oil is filled, the upper end face of the metal film sheet and the lower end face of the valve core of the hydraulic coupling cavity assembly are clamped in a vice, so that small deformation after oil filling is ensured. The air release plug is opened, the oil charging pressure of an external oil source is adjusted to be 0.2MPa, oil flows into the hydraulic coupling cavity through the oil charging one-way valve, and the air release plug is screwed into the coupling cavity when the oil flows out of the air release hole, so that reliable sealing is guaranteed. And then, when the pressure of the external oil source is adjusted to a set value of 0.5-1.0MPa, the pressure can be measured by bypassing a pressure gauge between the oil filling joint and the external oil source.
Secondly, the hydraulic coupling cavity assembly with the oil filled is installed in the shell, the piezoelectric actuator component is vertically placed in the upper hole of the shell, and the rectangular installation plate is placed in the shell again until the upper surface of the hydraulic coupling cavity assembly is pressed. Finally, 4 set screws are installed to tighten the piezoelectric actuator component and the rectangular mounting plate, thereby compressing the piezoelectric actuator component and the hydraulic coupling cavity assembly within the housing.
Thirdly, according to the thread parameters of the embodiment, finally, the valve sleeve component is screwed into the lower hole of the shell and the screwing number of turns is calculated, so that the valve sleeve screwing displacement x calculated according to the following formula is obtained: x is n multiplied by 2, wherein n is the number of turns of screwing and the thread pitch is 2 mm; thereby ensuring that the initial covering amount of the valve core and the valve hole in the valve sleeve reaches a set value of 0.1 mm.
(2) The specific implementation process is as follows:
when voltage of 0-200V is applied to the piezoelectric actuator, the piezoelectric actuator outputs linear variable force FSAnd generating a displacement XSThereby pushing the metal diaphragm to displace XSThe displacement of the metal diaphragm causes the oil volume of the coupling cavity to change XS×AdAccording to the oil motion quality continuous principle in the hydraulic coupling cavity, the oil volume change generated by the displacement of the metal diaphragm and the oil volume change X of the end of the metal corrugated pipeb×AbThe two are equal, and the area ratio of the metal diaphragm to the metal corrugated pipe is AdA, wherein XbIs the displacement of the end of the metal bellows, i.e. the valve core. Therefore, the hydraulic coupling cavity can amplify the output displacement of the piezoelectric actuator.
Secondly, when the initial covering amount of the valve core is minus 0.1mm, the oil inlet and the oil outlet are closed, and when the displacement X of the valve core isbWhen the opening is larger than 0.1mm, the oil inlet and the oil outlet of the valve are communicated, so that the pressure of the oil outlet is obtained, and the pressure linearly changes according to the change of the opening amount of the valve port.
The pressure control effect curve in the technical scheme of the invention shows the relationship among the driving voltage of the piezoelectric actuator, the displacement of the valve core and the output pressure. When the driving voltage of the piezoelectric actuator changes linearly from 0 to 200V, the displacement curve of the piezoelectric actuator changes from 0 to 14 micrometers, and as can be seen from the control effect curve, the piezoelectric actuator is acted by the pre-charging pressure in the hydraulic coupling cavity, and only when the driving voltage is increased to 65V, the displacement is output. Therefore, the valve core displacement curve corresponds to the piezoelectric actuator displacement curve, and changes from 0 to 0.33mm, and the displacement ratio is 23, namely the area ratio of the metal diaphragm to the metal corrugated pipe is 23. Therefore, the output pressure curve has better proportionality with the piezoelectric actuator driving voltage curve, the piezoelectric actuator displacement curve and the valve core displacement curve, the inflection point of the output pressure is determined by the load characteristic, and the control effect of the piezoelectric gear-shifting control valve in the embodiment is not influenced.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (5)
1. A piezoelectric shift control valve with a self-sensing feature, the control valve comprising:
the hydraulic coupling valve comprises a shell, a piezoelectric actuator component, a hydraulic coupling cavity component and a valve sleeve component; the hydraulic coupling valve is characterized in that the piezoelectric actuator component, the hydraulic coupling cavity component and the valve sleeve component are sequentially arranged from top to bottom;
the piezoelectric actuator component and the valve sleeve component are respectively communicated with the upper through hole and the lower through hole of the shell;
the piezoelectric actuator component includes: two ends of the columnar piezoelectric actuator are provided with a stop block, a shell is arranged outside the columnar piezoelectric actuator, and a base is positioned at the bottom end of the columnar piezoelectric actuator;
the hydraulic coupling cavity assembly is T-shaped and comprises: the T-shaped transverse part is sequentially provided with a metal diaphragm, a coupling cavity and an oil filling block from top to bottom, and the lower end of the vertical part is sleeved with a metal corrugated pipe and a valve core;
the upper side hole of the coupling cavity is communicated with the exhaust hole plug, and the lower side hole is communicated with an oil-filled one-way valve of which two sides are provided with O-shaped sealing rings; the oil filling joint is arranged on the lower side surface of the oil filling one-way valve in the assembling process;
a sliding part is arranged on the lower side of the vertical surface of the metal corrugated pipe;
the sliding member includes a sliding bearing.
2. A piezoelectric shift control valve with self-sensing feature as in claim 1 wherein the vertical portion of the T is provided with a valve sleeve and a screen glued or interference fit together.
3. A piezoelectric shift control valve having a self-sensing feature as recited in claim 1 wherein the means for providing a through-hole in said housing is a rectangular mounting plate that mates with said housing.
4. A piezoelectric shift control valve having a self-sensing feature as claimed in claim 3 wherein the vertical face of the rectangular mounting plate is provided with 4 number of fasteners fixed to the base of the piezoelectric actuator assembly.
5. The piezoelectric shift control valve with self-sensing feature of claim 4, wherein the fixture includes a mounting screw.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710946838 | 2017-10-12 | ||
| CN2017109468383 | 2017-10-12 |
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| Publication Number | Publication Date |
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| CN108131444A CN108131444A (en) | 2018-06-08 |
| CN108131444B true CN108131444B (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668848A (en) * | 2002-09-04 | 2005-09-14 | 松下制冷工业(新加坡)私人有限公司 | Piezo-electric compressor with displacement amplifier |
| CN102635586A (en) * | 2012-04-10 | 2012-08-15 | 大连海事大学 | Pure water piezoelectric ceramic driven reversing valve |
| CN102818069A (en) * | 2012-08-28 | 2012-12-12 | 哈尔滨工业大学 | Bellows-type piezoelectrically-hydraulically-actuated microfluidic servo valve and actuating device thereof |
| CN103016434A (en) * | 2012-12-20 | 2013-04-03 | 北京航空航天大学 | Piezoelectric ceramic direct-driving servo valve based on hydraulic micro-displacement amplification structure |
| CN103115149A (en) * | 2013-01-30 | 2013-05-22 | 中国北方车辆研究所 | Mass flow piezoelectric straight moving hydraulic reliever |
-
2017
- 2017-12-29 CN CN201711499443.XA patent/CN108131444B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668848A (en) * | 2002-09-04 | 2005-09-14 | 松下制冷工业(新加坡)私人有限公司 | Piezo-electric compressor with displacement amplifier |
| CN102635586A (en) * | 2012-04-10 | 2012-08-15 | 大连海事大学 | Pure water piezoelectric ceramic driven reversing valve |
| CN102818069A (en) * | 2012-08-28 | 2012-12-12 | 哈尔滨工业大学 | Bellows-type piezoelectrically-hydraulically-actuated microfluidic servo valve and actuating device thereof |
| CN103016434A (en) * | 2012-12-20 | 2013-04-03 | 北京航空航天大学 | Piezoelectric ceramic direct-driving servo valve based on hydraulic micro-displacement amplification structure |
| CN103115149A (en) * | 2013-01-30 | 2013-05-22 | 中国北方车辆研究所 | Mass flow piezoelectric straight moving hydraulic reliever |
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| CN108131444A (en) | 2018-06-08 |
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