CN113357205A - Gas-liquid ejection servo actuating system - Google Patents
Gas-liquid ejection servo actuating system Download PDFInfo
- Publication number
- CN113357205A CN113357205A CN202110666105.0A CN202110666105A CN113357205A CN 113357205 A CN113357205 A CN 113357205A CN 202110666105 A CN202110666105 A CN 202110666105A CN 113357205 A CN113357205 A CN 113357205A
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- Prior art keywords
- valve
- oil
- pressure
- booster pump
- electro
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
Abstract
The invention belongs to the field of ejection systems, and discloses a gas-liquid ejection servo actuating system which comprises a proportional reversing valve, a hydraulic motor, a booster pump, a bag-type energy accumulator, an electro-hydraulic servo valve, a single-rod hydraulic cylinder, a first pressure sensor, a second pressure sensor, a first pressure gauge, a second pressure gauge, a first travel switch, a second travel switch and a plurality of stop valves; the proportional reversing valve controls the rotating speed of the hydraulic motor and is used for controlling the oil pressure output by the booster pump; the bag-type separated energy accumulator is intersected with an oil way of the booster pump and is connected with an oil liquid inlet of the electro-hydraulic servo valve; the electro-hydraulic servo valve is connected with and controls the single-rod hydraulic cylinder. According to the invention, the hydraulic motor is controlled through the proportional reversing valve, so that the booster pump is driven to boost oil, and more electrical connection caused by the combination of the motor and the booster pump is avoided; the oil liquid is pressurized and then ejected, so that the power-weight ratio of the system is improved, the flow of the system is reduced, and the difficulty in component selection is reduced.
Description
Technical Field
The invention belongs to the field of ejection systems, and particularly relates to a gas-liquid ejection servo actuating system.
Background
In recent years, the use of ejection servo devices has been increasing. The conventional ejection device mainly includes a mechanical ejection device and a pneumatic ejection device. The mechanical ejection device has a complex structure and cannot be adjusted in time according to changes. The pneumatic ejection device has high requirements on energy and sealing, and the energy conversion efficiency is low. Therefore, the gas-liquid type ejection device is developed and applied as a new ejection device. And traditional gas-liquid formula jettison device is great to the flow demand of fluid, leads to the type selection of components and parts to be comparatively difficult always.
Disclosure of Invention
In view of the above problems, the structure of the traditional gas-liquid ejection servo actuating system is improved, and the hydraulic motor drives the booster pump to boost low-pressure oil provided by an external system and then eject the oil, so that the ejection servo actuating system has a larger power-weight ratio, the flow rate of the system is effectively reduced, the volume and the cost of components are reduced, and the difficulty in component selection in a design stage can be reduced.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
the gas-liquid ejection servo actuating system comprises a proportional reversing valve, a hydraulic motor, a booster pump, a bag isolation type energy accumulator, an electro-hydraulic servo valve, a single-rod hydraulic cylinder, a first pressure sensor, a second pressure sensor, a first pressure gauge, a second pressure gauge, a first travel switch, a second travel switch and a plurality of stop valves; the proportional reversing valve controls the rotating speed of the hydraulic motor and is used for controlling the oil pressure output by the booster pump; the bag-type separated energy accumulator is intersected with an oil way of the booster pump and is connected with an oil liquid inlet of the electro-hydraulic servo valve; the electro-hydraulic servo valve is connected with and controls the single-rod hydraulic cylinder.
Furthermore, a first pressure sensor and a first pressure gauge are arranged on an oil path between the bag isolation type energy accumulator and the third stop valve, and a second pressure sensor and a second pressure gauge are arranged on an oil path where the electro-hydraulic servo valve, the booster pump and the bag isolation type energy accumulator meet and used for detecting the internal pressure of the system.
Furthermore, an overflow valve is arranged on an output oil path of the booster pump, and when the pressure on an outlet pipeline of the booster pump is overlarge, the overflow valve is opened to remove partial pressure of the system.
Further, the control strategy of the system is:
step 1): before ejection, the third stop valve is opened, the air source charges certain pressure gas into the air bag of the bag-type energy accumulator, and when the charging pressure of the air bag reaches a set value, the third stop valve is closed and the second stop valve is opened;
step 2): when the oil pressure of the bag type energy accumulator reaches a set value, the energy storage is finished, the proportional reversing valve is powered off, and the booster pump stops supplying oil;
step 3): starting ejection, pushing high-pressure oil into an electro-hydraulic servo valve by compressed gas in a bag-type isolated accumulator, controlling oil inlet and return flows of the single-rod hydraulic cylinder by the electro-hydraulic servo valve, controlling the telescopic speed of a piston rod of the single-rod hydraulic cylinder in the ejection process, and pushing an ejection body out of a launch tube by the piston rod;
step 4): when the piston rod triggers the first travel switch, the valve port area of the electro-hydraulic servo valve is reduced according to a set rule, and the deceleration process is completed; when the piston rod triggers the second travel switch, the ejection process is completed, and the electro-hydraulic servo valve controls the piston rod to retract.
Compared with the traditional gas-liquid ejection servo actuating system, the invention has the following advantages:
1. according to the invention, the hydraulic motor is controlled by the proportional reversing valve, so that the booster pump is driven to boost oil, and more electrical connection caused by the combination of the motor and the booster pump is avoided; the rotation speed of the hydraulic motor is controlled through the proportional reversing valve, so that the supercharging flow is controlled.
2. According to the invention, the ejection is carried out after the oil liquid is pressurized, so that the power-weight ratio of the system is improved, the flow of the system is reduced, the size and the cost of components are effectively reduced, and the difficulty in component selection is reduced.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a hydraulic ejection system of the present invention.
In the figure: 1. the hydraulic control system comprises a proportional reversing valve, 2, a hydraulic motor, 3, a booster pump, 4, an overflow valve, 5, a one-way valve, 6, a safety valve, 7.1, a first stop valve, 7.2, a second stop valve, 7.3, a third stop valve, 8, a bag isolation type energy accumulator, 9.1, a first pressure sensor, 9.2, a second pressure sensor, 10.1, a first pressure gauge, 10.2, a second pressure gauge, 11, an electro-hydraulic servo valve, 12, a single-rod hydraulic cylinder, 13.1, a first travel switch, 13.2 and a second travel switch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The specific technical scheme of the invention is as follows:
as shown in figure 1, the gas-liquid ejection servo actuating system provided by the invention comprises a proportional reversing valve 1, a hydraulic motor 2, a booster pump 3, an overflow valve 4, a one-way valve 5, a safety valve 6, a first stop valve 7.1, a second stop valve 7.2, a third stop valve 7.3, a bag isolation type energy accumulator 8, a first pressure sensor 9.1, a second pressure sensor 9.2, a first pressure gauge 10.1, a second pressure gauge 10.2, an electro-hydraulic servo valve 11, a single-rod hydraulic cylinder 12, a first travel switch 13.1 and a second travel switch 13.2. The sac-isolated accumulator 8 is intersected with the oil circuit of the booster pump 3 and then led to the electro-hydraulic servo valve 11. The second shut-off valve 7.2 is open during operation of the system.
And a first pressure sensor 9.1 and a first pressure gauge 10.1 are arranged on an oil path between the bag isolation type energy accumulator 8 and the third stop valve 7.3, and a second pressure sensor 9.2 and a second pressure gauge 10.2 are arranged on an oil path where the electro-hydraulic servo valve 11, the booster pump 3 and the bag isolation type energy accumulator 8 are communicated and are used for detecting the internal pressure of the system. Meanwhile, a safety valve 6 is arranged on an oil path between the bag type energy accumulator 8 and the second stop valve 7.2 in the system, when the pressure in the system is overlarge, the first stop valve 7.1 is opened, partial pressure is removed through the safety valve 6, and the safe operation of the system is guaranteed. An overflow valve 4 is arranged on an output oil path of the booster pump 3, and when the pressure on an outlet pipeline of the booster pump 3 is overlarge, the overflow valve 4 is opened to discharge partial pressure. In order to prevent the high-pressure oil from flowing back during operation, a check valve 5 is provided in front of the booster pump 3.
The control strategy of the gas-liquid ejection servo actuating system is as follows:
step 1): before ejection, the third stop valve 7.3 is opened, the air source fills certain pressure gas into the air bag of the bag-type energy accumulator 8, when the inflation pressure of the air bag reaches a set value, the third stop valve 7.3 is closed, and the second stop valve 7.2 is opened.
Step 2): an electromagnet at one end of the proportional reversing valve 1 is electrified, the hydraulic motor 2 rotates to drive the booster pump 3 to boost oil entering the system, and then high-pressure oil is injected into the bag type energy accumulator 8 through the second stop valve 7.2 to store energy for ejection. At this time, the electrohydraulic servo valve 11 is at the neutral position, and the oil passage is temporarily cut off. The system controls the rotating speed of the hydraulic motor 2 through the proportional reversing valve 1, so that the oil flow of the booster pump 3 is controlled. When the oil pressure of the bladder type accumulator 8 reaches a set value, the energy storage is completed. At this time, the proportional directional valve 1 is de-energized, and the booster pump 3 stops supplying the oil.
Step 3): the ejection is started and the compressed gas in the bladder type accumulator 8 pushes the high pressure oil into the electro-hydraulic servo valve 11. The electro-hydraulic servo valve 11 is used for controlling oil inlet and return flow of the single-rod hydraulic cylinder 12, so that the extension and retraction speed of a piston rod of the single-rod hydraulic cylinder 12 in the ejection process is controlled, and the piston rod can push the projectile out of the launch tube.
Step 4): when the piston rod triggers the first travel switch 13.1, the valve port area of the electro-hydraulic servo valve 11 is reduced according to a set rule, the deceleration process is completed, and the impact and vibration in the ejection process are effectively reduced by additionally arranging a buffer structure at one end of the rod cavity of the single-rod hydraulic cylinder 12. When the piston rod triggers the second travel switch 13.2, the ejection process is complete. At this time, the electro-hydraulic servo valve 11 controls the retraction of the piston rod of the single-rod hydraulic cylinder 12. This completes a working cycle of ejection and retraction.
Claims (4)
1. The utility model provides a servo system that actuates is launched to gas-liquid which characterized in that:
the hydraulic control system comprises a proportional reversing valve, a hydraulic motor, a booster pump, a bag isolation type energy accumulator, an electro-hydraulic servo valve, a single-rod hydraulic cylinder, a first pressure sensor, a second pressure sensor, a first pressure gauge, a second pressure gauge, a first travel switch, a second travel switch and a plurality of stop valves;
the proportional reversing valve controls the rotating speed of the hydraulic motor and is used for controlling the oil pressure output by the booster pump;
the bag-type separated energy accumulator is intersected with an oil way of the booster pump and is connected with an oil liquid inlet of the electro-hydraulic servo valve;
the electro-hydraulic servo valve is connected with and controls the single-rod hydraulic cylinder.
2. The gas-liquid ejection servo actuating system according to claim 1, wherein:
and a first pressure sensor and a first pressure gauge are arranged on an oil path between the bag isolation type energy accumulator and the third stop valve, and a second pressure sensor and a second pressure gauge are arranged on an oil path where the electro-hydraulic servo valve, the booster pump and the bag isolation type energy accumulator meet and are used for detecting the internal pressure of the system.
3. The gas-liquid ejection servo actuating system according to claim 1, wherein:
and an overflow valve is arranged on an output oil path of the booster pump, and is opened when the pressure on an outlet pipeline of the booster pump is overlarge, so that partial pressure of the system is relieved.
4. The gas-liquid ejection servo actuating system according to claim 1, wherein:
the control strategy of the system is as follows:
step 1): before ejection, the third stop valve is opened, the air source charges certain pressure gas into the air bag of the bag-type energy accumulator, and when the charging pressure of the air bag reaches a set value, the third stop valve is closed and the second stop valve is opened;
step 2): when the oil pressure of the bag type energy accumulator reaches a set value, the energy storage is finished, the proportional reversing valve is powered off, and the booster pump stops supplying oil;
step 3): starting ejection, pushing high-pressure oil into an electro-hydraulic servo valve by compressed gas in a bag-type isolated accumulator, controlling oil inlet and return flows of the single-rod hydraulic cylinder by the electro-hydraulic servo valve, controlling the telescopic speed of a piston rod of the single-rod hydraulic cylinder in the ejection process, and pushing an ejection body out of a launch tube by the piston rod;
step 4): when the piston rod triggers the first travel switch, the valve port area of the electro-hydraulic servo valve is reduced according to a set rule, and the deceleration process is completed; when the piston rod triggers the second travel switch, the ejection process is completed, and the electro-hydraulic servo valve controls the piston rod to retract.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110666105.0A CN113357205B (en) | 2021-06-16 | 2021-06-16 | Gas-liquid ejection servo actuating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110666105.0A CN113357205B (en) | 2021-06-16 | 2021-06-16 | Gas-liquid ejection servo actuating system |
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| Publication Number | Publication Date |
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| CN113357205A true CN113357205A (en) | 2021-09-07 |
| CN113357205B CN113357205B (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110666105.0A Active CN113357205B (en) | 2021-06-16 | 2021-06-16 | Gas-liquid ejection servo actuating system |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081639A (en) * | 2006-06-02 | 2007-12-05 | 珠海星宇模型实业有限公司 | Ejecting system applied for unmanned aerial plane launching system |
| CN102003919A (en) * | 2010-10-29 | 2011-04-06 | 浙江工业大学 | Novel gas-liquid mixed power ejection device |
| CN103277353A (en) * | 2013-05-08 | 2013-09-04 | 燕山大学 | Unmanned aerial vehicle low impact catapult pneumatic and hydraulic system |
| CN105351260A (en) * | 2015-11-19 | 2016-02-24 | 南京理工大学 | Gas-liquid mixed multistage high-speed catapult |
| CN105480430A (en) * | 2015-12-24 | 2016-04-13 | 郑州彩通科技股份有限公司 | Hydraulic ejection system for unmanned aerial vehicle |
| CN206417215U (en) * | 2016-12-15 | 2017-08-18 | 邵大伟 | Launch the ejection firing device of the cable traction of the gas storage promotion of gas or gas recoverable |
| CN110500344A (en) * | 2019-08-26 | 2019-11-26 | 天津格特斯检测设备技术开发有限公司 | A kind of surge pilot system |
| CN110787887A (en) * | 2019-11-15 | 2020-02-14 | 左同明 | Fine crusher |
-
2021
- 2021-06-16 CN CN202110666105.0A patent/CN113357205B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081639A (en) * | 2006-06-02 | 2007-12-05 | 珠海星宇模型实业有限公司 | Ejecting system applied for unmanned aerial plane launching system |
| CN102003919A (en) * | 2010-10-29 | 2011-04-06 | 浙江工业大学 | Novel gas-liquid mixed power ejection device |
| CN103277353A (en) * | 2013-05-08 | 2013-09-04 | 燕山大学 | Unmanned aerial vehicle low impact catapult pneumatic and hydraulic system |
| CN105351260A (en) * | 2015-11-19 | 2016-02-24 | 南京理工大学 | Gas-liquid mixed multistage high-speed catapult |
| CN105480430A (en) * | 2015-12-24 | 2016-04-13 | 郑州彩通科技股份有限公司 | Hydraulic ejection system for unmanned aerial vehicle |
| CN206417215U (en) * | 2016-12-15 | 2017-08-18 | 邵大伟 | Launch the ejection firing device of the cable traction of the gas storage promotion of gas or gas recoverable |
| CN110500344A (en) * | 2019-08-26 | 2019-11-26 | 天津格特斯检测设备技术开发有限公司 | A kind of surge pilot system |
| CN110787887A (en) * | 2019-11-15 | 2020-02-14 | 左同明 | Fine crusher |
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| CN113357205B (en) | 2022-11-29 |
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