CN110529463B - Flexible hydraulic throttling speed regulation loop experimental system - Google Patents
Flexible hydraulic throttling speed regulation loop experimental system Download PDFInfo
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- CN110529463B CN110529463B CN201910671360.7A CN201910671360A CN110529463B CN 110529463 B CN110529463 B CN 110529463B CN 201910671360 A CN201910671360 A CN 201910671360A CN 110529463 B CN110529463 B CN 110529463B
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- 230000033228 biological regulation Effects 0.000 title claims abstract description 31
- 238000002474 experimental method Methods 0.000 claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
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- 238000012258 culturing Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2838—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT with out using position sensors, e.g. by volume flow measurement or pump 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/007—Simulation or modelling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
- G06Q50/20—Education
- G06Q50/205—Education administration or guidance
- G06Q50/2057—Career enhancement or continuing education service
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Abstract
The invention discloses a flexible hydraulic throttling speed regulation loop experimental system which comprises an oil tank (1), a filter (2), a motor (3), a hydraulic pump (4), an overflow valve (5), a throttling valve (6,8,13,15), a hydraulic cylinder (10), a spring (12) and various sensors, wherein the components can jointly form the flexible hydraulic throttling speed regulation loop experimental system; the various sensors are connected with the control system (16), and can feed various data information in the flexible hydraulic throttling speed regulation loop experimental system back to a display (2-3) in the control system (16) in real time and store the data information in a controller cabinet (2-5). The flexible hydraulic throttling speed regulation loop experimental system can be used for carrying out experiments of different throttling speed regulation loops without disassembling pipelines, and meanwhile, experimental data are collected and stored, so that the efficiency and the service life of the experimental system are improved.
Description
Technical Field
The invention relates to a hydraulic transmission experimental system, in particular to a flexible hydraulic throttling speed regulation loop experimental system, and belongs to the technical field of hydraulic transmission in the mechanical industry.
Background
The hydraulic transmission technology has wide application in engineering machinery equipment. The hydraulic transmission course is a professional technical basic course of the industry professions such as automation, mechano-electronic engineering, mechanical engineering and automation, and is a course with strong practicability; when learning hydraulic transmission, besides basic theoretical knowledge, the method is also an important learning method through experimental deepening understanding; the experimental teaching is an important practical teaching link combining theory and practice, is an important teaching means for learning, understanding and mastering the knowledge of hydraulic theory, and is an important technical means for culturing the practical capability and the manual operation capability of students.
The throttle speed regulating loop is a basic loop in a hydraulic system and is the basis for understanding and learning a hydraulic control theory. The existing hydraulic throttling speed regulation experiment system is generally a scattered part, and parts and pipelines are required to be disassembled when different loop experiments are carried out, so that leakage of hydraulic oil, pollution of the hydraulic oil and damage of the parts are caused. The environment pollution of a laboratory and dirtiness and unwilling to operate of students are caused, the switching time of a loop is long, and the time waste is caused. Meanwhile, the existing experimental equipment lacks of data acquisition and storage, cannot quantitatively analyze a hydraulic circuit, and influences experimental effects.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a flexible hydraulic throttling speed regulation loop experimental system, which is used for experiments, can realize flexible switching of different throttling speed regulation loops, and simultaneously performs data acquisition and storage, thereby improving the efficiency of loop switching, avoiding pollution, and improving the reliability of the system and the quality of experimental teaching.
In order to achieve the above purpose, the invention adopts the following technical scheme: a flexible hydraulic throttling speed regulation loop experimental system comprises an oil tank, a filter, a motor, a hydraulic pump, an overflow valve, a first throttling valve, a first pressure sensor, a second throttling valve, a second pressure sensor, a hydraulic cylinder, a displacement sensor, a spring, a third throttling valve, a third pressure sensor, a fourth throttling valve, a first flow sensor, a second flow sensor and a control system;
the motor is connected with a hydraulic pump; an oil suction port of the hydraulic pump is connected with the filter, and an oil outlet of the hydraulic pump is connected with the first throttle valve and the overflow valve; the outlet of the first throttle valve is connected with a second throttle valve and a third throttle valve, and the outlet of the second throttle valve is connected with a rodless cavity of the hydraulic cylinder; the rod cavity of the hydraulic cylinder is connected with the oil tank through a fourth throttle valve;
A first pressure sensor is arranged at the outlet of the first throttle valve; a second pressure sensor is arranged between the second throttle valve and the rodless cavity of the hydraulic cylinder; a third pressure sensor is arranged between the rod cavity of the hydraulic cylinder and the fourth throttle valve;
A first flow sensor is arranged between the third throttle valve and the oil tank; a second flow sensor is arranged between the overflow valve and the oil tank; a displacement sensor is arranged on a hydraulic rod of the hydraulic cylinder; one end of the spring is fixed, and the other end of the spring is connected with a hydraulic rod of the hydraulic cylinder.
The first pressure sensor, the second pressure sensor, the displacement sensor, the third pressure sensor, the first flow sensor and the second flow sensor are all connected with a control system.
Further, the control system comprises a hydraulic power control cabinet box, an experiment working platform, a display, a throttle valve control panel and a controller cabinet box.
Further, the data collected during the experiment are stored in the controller cabinet, and after calculation, processing and analysis are performed in the controller, the result is displayed by the display.
The invention can perform experiments of different throttling speed regulating loops without disassembling pipelines, and collect and store experimental data at the same time, thereby improving the switching efficiency of different loops in the experimental process, avoiding leakage of hydraulic oil and prolonging the service life of an experimental system.
The invention can compare and analyze the speed conditions under different loads, and can perform comprehensive system analysis and research through the fusion of the sensors, and the transmission efficiency, the load characteristics and the like of the system can be deeply reflected through data analysis according to the tested data.
Drawings
FIG. 1 is a schematic diagram of a hydraulic system of the present invention;
FIG. 2 is a schematic diagram of an experimental system of the present invention;
FIG. 3 is a schematic view of a throttle adjustment panel of the present invention;
FIG. 4 is a diagram of a test curve display interface of the present invention;
in the figure, 1, tank, 2, filter, 3, motor, 4, hydraulic pump, 5, relief valve, 6, first throttle, 7, first pressure sensor, 8, second throttle, 9, second pressure sensor, 10, hydraulic cylinder, 11, displacement sensor, 12, spring, 13, third throttle, 14, third pressure sensor, 15, fourth throttle, 16, control system, 17, first flow sensor, 18, second flow sensor, 2-1, hydraulic power control cabinet, 2-2, experimental work platform, 2-3, display, 2-4, throttle control panel, 2-5, controller cabinet, 3-1, throttle control knob, 4-1, hydraulic cylinder position curve, 4-2, hydraulic cylinder speed curve, 4-3 loop efficiency curve.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, a flexible hydraulic throttling speed regulation loop experimental system comprises an oil tank 1, a filter 2, an electric motor 3, a hydraulic pump 4, an overflow valve 5, a first throttling valve 6, a first pressure sensor 7, a second throttling valve 8, a second pressure sensor 9, a hydraulic cylinder 10, a displacement sensor 11, a spring 12, a third throttling valve 13, a third pressure sensor 14, a fourth throttling valve 15, a first flow sensor 17, a second flow sensor 18 and a control system 16, wherein all the above components can be combined into the flexible hydraulic throttling speed regulation loop experimental system;
The motor 3 is connected with a hydraulic pump 4; an oil suction port of the hydraulic pump 4 is connected with the filter 2, and an oil outlet of the hydraulic pump is connected with the first throttle valve 6 and the overflow valve 5; the outlet of the first throttle valve 6 is connected with a second throttle valve 8 and a third throttle valve 13, and the outlet of the second throttle valve 8 is connected with a rodless cavity of the hydraulic cylinder 10; the rod cavity of the hydraulic cylinder 10 is connected with an oil tank after passing through a fourth throttle valve 15;
A first pressure sensor 7 is arranged at the outlet of the first throttle valve 6; a second pressure sensor 9 is arranged between the second throttle valve 8 and the rodless cavity of the hydraulic cylinder 10; a third pressure sensor 14 is arranged between the rod cavity of the hydraulic cylinder 10 and a fourth throttle valve 15;
a first flow sensor 17 is arranged between the third throttle valve 13 and the oil tank 1; a second flow sensor 18 is arranged between the overflow valve 5 and the oil tank 1;
A displacement sensor 11 is arranged on a hydraulic rod of the hydraulic cylinder 10; one end of the spring 12 is fixed, and the other end is connected with a hydraulic rod of the hydraulic cylinder 10.
The first pressure sensor 7, the second pressure sensor 9, the displacement sensor 11, the third pressure sensor 14, the first flow sensor 17 and the second flow sensor 18 are all connected to a control system 16.
As shown in fig. 2 and 3, the control system 16 includes a hydraulic power control cabinet 2-1, an experiment working platform 2-2, a display 2-3, a throttle control panel 2-4, and a controller cabinet 2-5, the throttle control panel 2-4 further having 4 throttle control buttons 3-1.
As shown in fig. 4, data collected during the experiment are stored in the controller, and are calculated, processed and analyzed in the controller, and then a curve map is drawn, such as a hydraulic cylinder position curve 4-1 and a hydraulic cylinder speed curve 4-2 which are drawn after being processed and analyzed by data measured by a displacement sensor, and a loop efficiency curve 4-3 which is drawn after being processed and analyzed by data measured by a plurality of sensors in cooperation with each other.
When the variable-pressure outlet throttling speed regulation loop experiment is carried out, the size of the spring 12 and the opening pressure of the overflow valve 5 are set at the same time (at the moment, the overflow valve 5 is not opened), and the outlet pressure of the hydraulic pump 4 rises along with the increase of the compression amount of the spring; at this time, the outlet pressure of the hydraulic pump 4 is varied, and the reading of the second flow sensor 18 is zero. The reading of the first flow sensor 17 is inversely proportional to the speed of the hydraulic cylinder 10. Control of the speed of the hydraulic cylinder 10 is achieved by adjusting the fourth throttle 15. When the opening size of the fourth throttle valve 15 is fixed, the speed of the hydraulic cylinder 10 decreases as the compression amount of the spring 12 increases.
When the variable-pressure inlet throttling speed regulation loop experiment is carried out, the size of the spring 12 and the opening pressure of the overflow valve 5 are set at the same time (at the moment, the overflow valve 5 is not opened), and the outlet pressure of the hydraulic pump 4 is increased along with the increase of the compression amount of the spring; the outlet pressure of the hydraulic pump 4 is varied at this time. The reading of the second flow sensor 18 is zero. The reading of the first flow sensor 17 is inversely proportional to the speed of the hydraulic cylinder 10. The control of the speed of the hydraulic cylinder 10 is achieved by adjusting the second throttle valve 8. When the opening size of the second throttle valve 8 is fixed, the speed of the hydraulic cylinder 10 decreases as the compression amount of the spring 12 increases.
When the constant-pressure outlet throttling speed regulation loop experiment is carried out, the third throttling valve 13 is closed, the size of the spring 12 and the opening pressure of the overflow valve 5 are set, at the moment, the overflow valve 5 is opened, the outlet pressure of the hydraulic pump 4 is basically equal to the set pressure of the overflow valve 5, and the outlet pressure of the hydraulic pump 4 is basically constant. The first flow sensor 17 reads zero. The reading of the second flow sensor 18 is inversely proportional to the speed of the hydraulic cylinder 10. Control of the speed of the hydraulic cylinder 10 is achieved by adjusting the fourth throttle 15. When the opening size of the fourth throttle valve 15 is fixed, the speed of the hydraulic cylinder 10 decreases as the compression amount of the spring 12 increases.
When the constant-pressure inlet throttling speed regulation loop experiment is carried out, the third throttling valve 13 is closed, the size of the spring 12 and the opening pressure of the overflow valve 5 are set, at the moment, the overflow valve 5 is opened, the outlet pressure of the hydraulic pump 4 is basically equal to the set pressure of the overflow valve 5, and the outlet pressure of the hydraulic pump 4 is basically constant. The first flow sensor 17 reads zero. The reading of the second flow sensor 18 is inversely proportional to the speed of the hydraulic cylinder 10. The control of the speed of the hydraulic cylinder 10 is achieved by adjusting the second throttle valve 8. When the opening size of the second throttle valve 8 is fixed, the speed of the hydraulic cylinder 10 decreases as the amount of compression of the spring 12 increases.
In several governor circuits, the calculation of the efficiency of the transmission circuit can be performed by the readings of the sensor. The position and speed of the hydraulic cylinders may be displayed in the control system. The speed regulation characteristic of the throttling speed regulation loop can be intuitively embodied. I.e. as the load increases, the speed of the hydraulic cylinder will decrease, i.e. the load characteristics of the throttle control will be softer.
When the inlet throttling speed regulation loop experiment is carried out, the speed regulation characteristic of the constant-difference pressure-reducing speed regulation valve can be simulated for improving the load characteristic of throttling speed regulation. At this time, the third throttle valve 13 is closed while the size of the spring 12 and the opening pressure of the relief valve 5 are set, and at this time, the relief valve 5 is opened, the outlet pressure of the hydraulic pump 4 is substantially equal to the set pressure of the relief valve 5, and the outlet pressure of the hydraulic pump 4 is substantially constant. The first flow sensor 17 reads zero. The reading of the second flow sensor 18 is inversely proportional to the speed of the hydraulic cylinder 10. The opening size of the second throttle valve 8 is fixed, the pressure difference of the second throttle valve 8 is basically constant by adjusting the opening size of the first throttle valve 6, namely, the speed of the hydraulic cylinder 5 is basically constant, the speed is lower without increasing the pressure of the spring 12, and the speed regulation performance of the constant-difference speed regulating valve is realized.
When the inlet throttling speed regulation loop experiment is carried out, the speed regulation characteristic of the three-way flow valve can be simulated in order to improve the load characteristic of throttling speed regulation. At this time, the first throttle valve 6 is completely opened, the size of the spring 12 and the opening pressure of the relief valve 5 are set, at this time, the relief valve 5 is not opened, and the outlet pressure of the hydraulic pump 4 varies with the load. The first flow sensor 17 reads zero. The reading of the second flow sensor 18 is inversely proportional to the speed of the hydraulic cylinder 10. The opening size of the second throttle valve 8 is fixed, and the pressure difference of the second throttle valve 8 is basically constant by adjusting the opening size of the third throttle valve 13, so that the speed of the hydraulic cylinder 10 is basically constant, the speed is not reduced along with the increase of the pressure of the spring 12, and the speed regulation performance experiment of the three-way speed regulation valve is realized.
Claims (2)
1. The flexible hydraulic throttling speed regulation loop experimental system comprises an oil tank (1), a filter (2), a motor (3), a hydraulic pump (4), an overflow valve (5), a first throttling valve (6), a first pressure sensor (7), a second throttling valve (8), a second pressure sensor (9), a hydraulic cylinder (10), a displacement sensor (11), a spring (12), a third throttling valve (13), a third pressure sensor (14), a fourth throttling valve (15), a first flow sensor (17) and a second flow sensor (18), and is characterized by further comprising a control system (16);
The motor (3) is connected with a hydraulic pump (4); an oil suction port of the hydraulic pump (4) is connected with the filter (2), and an oil outlet of the hydraulic pump is connected with the first throttle valve (6) and the overflow valve (5); the outlet of the first throttle valve (6) is connected with a second throttle valve (8) and a third throttle valve (13), and the outlet of the second throttle valve (8) is connected with a rodless cavity of the hydraulic cylinder (10); the rod cavity of the hydraulic cylinder (10) is connected with an oil tank through a fourth throttle valve (15);
A first pressure sensor (7) is arranged at the outlet of the first throttle valve (6); a second pressure sensor (9) is arranged between the second throttle valve (8) and the rodless cavity of the hydraulic cylinder (10); a third pressure sensor (14) is arranged between the rod cavity of the hydraulic cylinder (10) and the fourth throttle valve (15);
a first flow sensor (17) is arranged between the third throttle valve (13) and the oil tank (1); a second flow sensor (18) is arranged between the overflow valve (5) and the oil tank (1);
A displacement sensor (11) is arranged on a hydraulic rod of the hydraulic cylinder (10); one end of the spring (12) is fixed, and the other end of the spring is connected with a hydraulic rod of the hydraulic cylinder (10);
The first pressure sensor (7), the second pressure sensor (9), the displacement sensor (11), the third pressure sensor (14), the first flow sensor (17) and the second flow sensor (18) are all connected with the control system (16);
The control system (16) comprises a hydraulic power control cabinet (2-1), an experiment working platform (2-2), a display (2-3), a throttle control panel (2-4) and a controller cabinet (2-5), wherein the throttle control panel (2-4) is further provided with 4 throttle control buttons (3-1).
2. The flexible hydraulic throttle timing loop experiment system according to claim 1, wherein the data collected during the experiment are stored in a controller cabinet (2-5), and the result is displayed by a display (2-3) after calculation, processing and analysis are performed in the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910671360.7A CN110529463B (en) | 2019-07-24 | 2019-07-24 | Flexible hydraulic throttling speed regulation loop experimental system |
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| CN201910671360.7A CN110529463B (en) | 2019-07-24 | 2019-07-24 | Flexible hydraulic throttling speed regulation loop experimental system |
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| CN110529463B true CN110529463B (en) | 2024-08-13 |
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| CN113757197B (en) * | 2021-07-22 | 2023-02-14 | 浙江大学 | Constant pressure control method of pump station |
| CN115405573B (en) * | 2022-08-16 | 2024-07-16 | 浙江大学高端装备研究院 | Multifunctional teaching experiment platform for electrohydraulic servo proportional system |
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| CN211370887U (en) * | 2019-07-24 | 2020-08-28 | 徐州工程学院 | Flexible hydraulic throttling speed-regulating loop experimental system |
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| CN102155007B (en) * | 2011-01-28 | 2012-08-15 | 黄河勘测规划设计有限公司 | Hydraulic system for trolley driving mechanism of inclined sliding door hoist |
| CN202040151U (en) * | 2011-04-20 | 2011-11-16 | 重庆工商大学 | Automatic multi-functional testing system for teaching |
| CN104299503B (en) * | 2014-08-12 | 2017-03-29 | 北京理工大学 | A kind of weight loading Pattern of Hydraulic Experiment Teaching system and its experimental technique |
| CN207637404U (en) * | 2017-10-20 | 2018-07-20 | 北京理工大学 | A hydraulic experiment teaching device |
| CN207920989U (en) * | 2018-03-15 | 2018-09-28 | 四川职业技术学院 | A kind of throttling speed control circuit for maintaining hydraulic pressure system speed to stablize |
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