CN110360186B - Test method for hydraulic turnover system based on PLC cab - Google Patents
Test method for hydraulic turnover system based on PLC cab Download PDFInfo
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- CN110360186B CN110360186B CN201910700142.1A CN201910700142A CN110360186B CN 110360186 B CN110360186 B CN 110360186B CN 201910700142 A CN201910700142 A CN 201910700142A CN 110360186 B CN110360186 B CN 110360186B
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- oil pump
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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
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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
- F15B19/005—Fault detection or monitoring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/87—Detection of failures
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Fluid-Pressure Circuits (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The invention relates to the technical field of automobiles, in particular to a test method of a hydraulic turnover system based on a PLC cab. The method comprises the following steps: initializing the starting and testing device positions; step two: initializing an internal program of the PLC; step three: the oil pump reversing switching position is controlled to be in a rising position, the PLC controls the electromagnetic valve of the oil pump reversing handle to act, the oil pump reverses and rotates the small cylinder to act, and the oil pump reversing handle is in a rising position; step four: the oil pump rocker arm and the large cylinder are controlled to reciprocate, the cab is lifted through the lever mechanism, the PLC controls the electromagnetic valve of the oil pump rocker arm to act, the oil pump rocker arm and the large cylinder reciprocate, and the lever mechanism drives the hydraulic overturning oil pump to pump oil; to control cab lift; reliable operation, high efficiency and low cost.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a test method of a hydraulic turnover system based on a PLC cab.
Background
The head of a modern heavy truck is generally short-head, an engine and a gearbox power assembly are arranged below a cab, and in the whole service period of the heavy truck, the cab needs to be turned over for the daily maintenance and repair of the power assembly to vacate the working space, so that a cab hydraulic turning system is of great importance; in order to ensure the working reliability of the heavy-steam commercial vehicle cab hydraulic turnover system in the design service life cycle, heavy-steam manufacturers need to test the durability of the heavy-steam cab hydraulic turnover system during heavy-steam research and development demonstration; at present, many enterprises are in an original state of adopting manual operation to carry out tests, a large amount of manpower is consumed, the efficiency is low, the PLC control method has excellent PLC control algorithm, full-automatic operation, automatic fault identification and processing, reliable work and high efficiency and low cost; the test method is successfully applied to the durability test of the hydraulic turnover system of the Jiangling heavy-steam cab.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, adapt to practical requirements and provide a test method of a hydraulic turnover system based on a PLC cab.
In order to realize the purpose of the invention, the invention adopts the technical scheme that: a test method based on a PLC cab hydraulic turnover system comprises the following steps:
the method comprises the following steps: initializing the starting and testing device positions;
step two: initializing an internal program of the PLC;
step three: the oil pump reversing switching position is controlled to be in a rising position, the PLC controls the electromagnetic valve of the oil pump reversing handle to act, the oil pump reverses and rotates the small cylinder to act, and the oil pump reversing handle is in a rising position;
step four: the oil pump rocker arm and the large cylinder are controlled to reciprocate, the cab is lifted through the lever mechanism, the PLC controls the electromagnetic valve of the oil pump rocker arm to act, the oil pump rocker arm and the large cylinder reciprocate, and the lever mechanism drives the hydraulic overturning oil pump to pump oil; to control cab lift;
step five: judging whether the cab is turned to the upward maximum position within preset time, wherein within the preset time, the PLC continuously reads a detection switch of 'turning in place', if so, the program goes to 'step six', and if not, the program jumps to 'step eleven';
step six: according to the test requirements, program control is carried out, the test requirements are waited for 10 seconds, and the waiting time can be set according to different test requirements; after waiting for the time, jumping to 'step seven';
step seven: the oil pump reversing switching position is controlled to be in a descending position, the PLC controls the electromagnetic valve of the oil pump reversing handle to act, the oil pump reverses and rotates the small cylinder to act, and the oil pump reversing handle is in a descending position;
step eight: the oil pump rocker arm and the large cylinder are controlled to reciprocate, the cab descends through the lever mechanism, the PLC controls the electromagnetic valve of the oil pump rocker arm to act, the oil pump rocker arm and the large cylinder reciprocate, and the lever mechanism drives the hydraulic overturning oil pump to pump oil; to control the cab to descend;
step nine: judging whether the cab is overturned to the maximum downward position within preset time, wherein within the preset time, the PLC continuously reads the detection switch of 'overturning in place', if the detection switch closing signal is read within the preset time, the program is transferred to 'step ten', and if the detection switch closing signal is not read, the program is transferred to 'step eleven';
step ten: according to the test requirements, program control is carried out, the test requirements are waited for 10 seconds, and the waiting time can be set according to different test requirements; after the waiting time is up, jumping to step three;
step eleven: and (5) fault processing.
The initialization setting in the first step comprises the following steps:
(1) the cab is in a falling position;
(2) the large oil pump rocker arm cylinder and the small oil pump reversing rotary cylinder are in a preset state;
(3) the 'gas' loop and the 'electric' loop of the test device are connected in place;
(4) the upper in-place detection switch and the lower in-place detection switch are turned over and are arranged at proper positions;
(5) count display module sensors are also disposed in appropriate locations.
The second step comprises the following steps:
(1) correspondingly turning over for a preset time from top to bottom, wherein the preset time is used for judgment in the step five;
(2) the reciprocating time of a rocker arm large cylinder;
(3) the oil pump changes the movement time of the rotating small cylinder; these preset data are input into the interior of the PLC.
The fault processing of the step eleven comprises the following steps:
(1) the electromagnetic valve of the oil pump reversing handle is powered off;
(2) the electromagnetic valve of the rocker arm of the oil pump is powered off;
(3) the alarm device works.
The invention has the beneficial effects that:
the invention has excellent PLC control algorithm and program operation idea to completely simulate the normal use of customers;
the automatic running and starting device does not need testers to take care of the test at one side
The fault is automatically identified and processed, the fault occurs, and an alarm lamp sounds to remind a tester;
reliable work, high efficiency and low cost;
the turnover cycle times are visible in real time, and the turnover device has the functions of power-off storage and automatic power-on restoration to display of the last display.
Drawings
The invention is further explained below with reference to the drawings and the embodiments.
FIG. 1: a schematic diagram of the system;
FIG. 2: reversing handle & manual rocker arm schematic;
FIG. 3: program control flow chart.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
see fig. 1-3.
The invention discloses a test method of a hydraulic turnover system based on a PLC cab, which comprises the following steps:
the method comprises the following steps: initializing the starting and testing device positions;
step two: initializing an internal program of the PLC;
step three: the oil pump reversing switching position is controlled to be in a rising position, the PLC controls the electromagnetic valve of the oil pump reversing handle to act, the oil pump reverses and rotates the small cylinder to act, and the oil pump reversing handle is in a rising position;
step four: the oil pump rocker arm and the large cylinder are controlled to reciprocate, the cab is lifted through the lever mechanism, the PLC controls the electromagnetic valve of the oil pump rocker arm to act, the oil pump rocker arm and the large cylinder reciprocate, and the lever mechanism drives the hydraulic overturning oil pump to pump oil; to control cab lift;
step five: judging whether the cab is turned to the upward maximum position within preset time, wherein within the preset time, the PLC continuously reads a detection switch of 'turning in place', if so, the program goes to 'step six', and if not, the program jumps to 'step eleven';
step six: according to the test requirements, program control is carried out, the test requirements are waited for 10 seconds, and the waiting time can be set according to different test requirements; after waiting for the time, jumping to 'step seven';
step seven: the oil pump reversing switching position is controlled to be in a descending position, the PLC controls the electromagnetic valve of the oil pump reversing handle to act, the oil pump reverses and rotates the small cylinder to act, and the oil pump reversing handle is in a descending position;
step eight: the oil pump rocker arm and the large cylinder are controlled to reciprocate, the cab descends through the lever mechanism, the PLC controls the electromagnetic valve of the oil pump rocker arm to act, the oil pump rocker arm and the large cylinder reciprocate, and the lever mechanism drives the hydraulic overturning oil pump to pump oil; to control the cab to descend;
step nine: judging whether the cab is overturned to the maximum downward position within preset time, wherein within the preset time, the PLC continuously reads the detection switch of 'overturning in place', if the detection switch closing signal is read within the preset time, the program is transferred to 'step ten', and if the detection switch closing signal is not read, the program is transferred to 'step eleven';
step ten: according to the test requirements, program control is carried out, the test requirements are waited for 10 seconds, and the waiting time can be set according to different test requirements; after the waiting time is up, jumping to step three;
step eleven: and (5) fault processing.
The initialization setting in the first step comprises the following steps:
(1) the cab is in a falling position;
(2) the large oil pump rocker arm cylinder and the small oil pump reversing rotary cylinder are in a preset state;
(3) the 'gas' loop and the 'electric' loop of the test device are connected in place;
(4) the upper in-place detection switch and the lower in-place detection switch are turned over and are arranged at proper positions;
(5) count display module sensors are also disposed in appropriate locations.
The second step comprises the following steps:
(1) correspondingly turning over for a preset time from top to bottom, wherein the preset time is used for judgment in the step five;
(2) the reciprocating time of a rocker arm large cylinder;
(3) the oil pump changes the movement time of the rotating small cylinder; these preset data are input into the interior of the PLC.
The fault processing of the step eleven comprises the following steps:
(1) the electromagnetic valve of the oil pump reversing handle is powered off;
(2) the electromagnetic valve of the rocker arm of the oil pump is powered off;
(3) the alarm device works.
Based on signals acquired by the PLC, calculating an internal control algorithm, and further performing corresponding output control, wherein the system architecture diagram refers to FIG. 1:
explanation of functions of each module:
1. the PLC control core: the PLC module is based on Mitsubishi FX2N series PLC, and PLC control statements are written in the PLC module; the main function is to carry out corresponding output control according to the signal of the acquisition sensor;
2. 220V exchanges 24V voltage regulator unit: providing power supply output with corresponding voltage for each subsystem of the device;
3. the detection switch of 'turning in place': when the heavy-steam cab overturns and moves upwards to the maximum position, the detection switch outputs a closing signal, and the detection switch is Normally Open (NO);
4. the detection switch of "turning down to the right": when the heavy-steam cab overturns and runs downwards to the maximum position, the detection switch outputs a closing signal, and the detection switch is Normally Open (NO);
5. an alarm module: if a fault occurs in the endurance test process of the cab hydraulic turnover system, the test is suspended, and a buzzer alarm lamp of an alarm module sounds to remind a tester of the abnormal test;
6. a counting display module: the test device completes a cab turnover cycle without failure, the displayed number is increased by 1, and meanwhile, the module has the functions of power-off protection and automatic recovery to the previous counting state after being electrified again;
7. oil pump reversing handle solenoid valve: a three-position 5-way electromagnetic valve (middle exhaust type) controls the oil pump to rotate in a reversing way to make the small cylinder act;
8. oil pump rocker solenoid valve: a three-position five-way electromagnetic valve (middle exhaust type) controls the action of a big cylinder of an oil pump rocker arm;
9. air pressure adjusting/stabilizing device a: the system mainly comprises a pressure reducing valve and a stop valve, wherein the pressure reducing valve and the stop valve are used for manually adjusting the gas pressure and flow rate in a gas pipe between an oil pump rocker arm electromagnetic valve interface and an oil pump rocker arm large cylinder;
10. the air supply providing device comprises: the system is connected with the whole factory air supply or the air compressor air supply and comprises an oil-water separator and an air dryer;
11. air pressure adjusting/stabilizing device b: the device mainly comprises a pressure reducing valve and a shutoff valve, and is used for manually adjusting the gas pressure and flow rate in a gas pipe between an oil pump reversing handle electromagnetic valve interface and an oil pump reversing rotary small cylinder;
12. oil pump switching-over rotation small cylinder: the cylinder is connected with an oil pump reversing handle through a small connecting clamp, and the cylinder rotates; the switching of the rotating position controls the driving to be in an 'ascending' or 'descending' mode;
13. the oil pump rocker arm is a large cylinder, namely a manual rocker arm connected with an oil pump through a lever mechanism, and the cylinder operates in a reciprocating mode.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (4)
1. A test method based on a PLC cab hydraulic turnover system is characterized by comprising the following steps:
the method comprises the following steps: initializing the starting and testing device positions;
step two: initializing an internal program of the PLC;
step three: the oil pump reversing switching position is controlled to be in a rising position, the PLC controls the electromagnetic valve of the oil pump reversing handle to act, the oil pump reverses and rotates the small cylinder to act, and the oil pump reversing handle is in a rising position;
step four: the oil pump rocker arm and the large cylinder are controlled to reciprocate, the cab is lifted through the lever mechanism, the PLC controls the electromagnetic valve of the oil pump rocker arm to act, the oil pump rocker arm and the large cylinder reciprocate, and the lever mechanism drives the hydraulic overturning oil pump to pump oil; to control cab lift;
step five: judging whether the cab is turned to the upward maximum position within preset time, wherein within the preset time, the PLC continuously reads a detection switch of 'turning in place', if so, the program goes to 'step six', and if not, the program jumps to 'step eleven';
step six: according to the test requirements, program control is carried out, the test requirements are waited for 10 seconds, and the waiting time can be set according to different test requirements; after waiting for the time, jumping to 'step seven';
step seven: the oil pump reversing switching position is controlled to be in a descending position, the PLC controls the electromagnetic valve of the oil pump reversing handle to act, the oil pump reverses and rotates the small cylinder to act, and the oil pump reversing handle is in a descending position;
step eight: the oil pump rocker arm and the large cylinder are controlled to reciprocate, the cab descends through the lever mechanism, the PLC controls the electromagnetic valve of the oil pump rocker arm to act, the oil pump rocker arm and the large cylinder reciprocate, and the lever mechanism drives the hydraulic overturning oil pump to pump oil; to control the cab to descend;
step nine: judging whether the cab is overturned to the maximum downward position within preset time, wherein within the preset time, the PLC continuously reads the detection switch of 'overturning in place', if the detection switch closing signal is read within the preset time, the program is transferred to 'step ten', and if the detection switch closing signal is not read, the program is transferred to 'step eleven';
step ten: according to the test requirements, program control is carried out, the test requirements are waited for 10 seconds, and the waiting time can be set according to different test requirements; after the waiting time is up, jumping to step three;
step eleven: and (5) fault processing.
2. The PLC-based cab hydraulic rollover system testing method as recited in claim 1, wherein the initialization setting in the first step comprises:
(1) the cab is in a falling position;
(2) the large oil pump rocker arm cylinder and the small oil pump reversing rotary cylinder are in a preset state;
(3) the 'gas' loop and the 'electric' loop of the test device are connected in place;
(4) the upper in-place detection switch and the lower in-place detection switch are turned over and are arranged at proper positions;
(5) count display module sensors are also disposed in appropriate locations.
3. The PLC-based cab hydraulic turnover system test method of claim 1, wherein the second step comprises:
(1) correspondingly turning over for a preset time from top to bottom, wherein the preset time is used for judgment in the step five;
(2) the reciprocating time of a rocker arm large cylinder;
(3) the oil pump changes the movement time of the rotating small cylinder; these preset data are input into the interior of the PLC.
4. The PLC-based cab hydraulic rollover system testing method as defined in claim 1, wherein the fault handling of step eleven comprises:
(1) the electromagnetic valve of the oil pump reversing handle is powered off;
(2) the electromagnetic valve of the rocker arm of the oil pump is powered off;
(3) the alarm device works.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910700142.1A CN110360186B (en) | 2019-07-31 | 2019-07-31 | Test method for hydraulic turnover system based on PLC cab |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910700142.1A CN110360186B (en) | 2019-07-31 | 2019-07-31 | Test method for hydraulic turnover system based on PLC cab |
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| CN110360186A CN110360186A (en) | 2019-10-22 |
| CN110360186B true CN110360186B (en) | 2020-06-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595593A (en) * | 2020-05-29 | 2020-08-28 | 东风商用车有限公司 | Cab turnover test device and test method thereof |
| CN112014121A (en) * | 2020-09-07 | 2020-12-01 | 湖南行必达网联科技有限公司 | Cab turnover system experiment device and vehicle experiment system |
| CN112684752A (en) * | 2020-12-02 | 2021-04-20 | 湖南行必达网联科技有限公司 | Cab turnover test device and test method |
| CN113666315B (en) * | 2021-08-23 | 2023-05-23 | 东风柳州汽车有限公司 | Cab turnover device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828001A (en) * | 1981-08-08 | 1983-02-18 | Diesel Kiki Co Ltd | Hydraulic cylinder for cab tilting |
| CN203868043U (en) * | 2014-05-06 | 2014-10-08 | 浙江科力车辆控制系统有限公司 | Remote-controllable driving cab hydraulic lifter |
| CN204279667U (en) * | 2014-12-11 | 2015-04-22 | 襄阳群龙汽车部件股份有限公司 | A kind of hydraulic lifting turning device of automobile cab |
| CN204575344U (en) * | 2015-05-20 | 2015-08-19 | 湖北三江航天万山特种车辆有限公司 | A kind of driver's cab turnover test unit |
| CN106697079A (en) * | 2015-11-12 | 2017-05-24 | 北汽福田汽车股份有限公司 | Supporting device for cab, vehicle and safety early warning method of vehicle |
| CN205843971U (en) * | 2016-07-18 | 2016-12-28 | 陕西汽车实业有限公司 | Hydraulic cab upset systems test bed |
| CN107472382B (en) * | 2017-08-15 | 2019-08-06 | 安徽江淮汽车集团股份有限公司 | A kind of driver's cab turnover control device and its control method |
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