CN115342964A - Crane brake braking torque detection method and system, storage medium and intelligent terminal - Google Patents
Crane brake braking torque detection method and system, storage medium and intelligent terminal Download PDFInfo
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- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
- G01L5/284—Measuring braking-time or braking distance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
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Abstract
The application relates to a method and a system for detecting the brake torque of a crane brake, a storage medium and an intelligent terminal, and relates to the field of special equipment detection technology, wherein the method comprises the steps of increasing the output current of a frequency converter; acquiring current test torque information and rotation speed information; judging whether the rotation speed information is larger than 0 and is unchanged; if the current test torque is larger than 0 and is not changed, judging whether the current test torque information is smaller than a torque safety value; if the current test torque is smaller than the test torque, current test torque information and test failure information are output; if so, outputting current test torque information and test passing information; if not, judging whether the current test torque information is equal to the maximum torque value information or not; if yes, outputting test abnormal information; if not, then acquire the slew velocity information, this application has need not to test through the heavy object, has improved the security and the effect of convenience that brake moment detected.
Description
Technical Field
The application relates to the field of special equipment detection technology, in particular to a method and a system for detecting braking torque of a crane brake, a storage medium and an intelligent terminal.
Background
The large-scale hoisting equipment brake is generally controlled by matching mechanical transmission and hydraulic transmission, when pressure oil in a hydraulic station enters a brake oil cylinder through the control of an electromagnetic valve, the pressure oil further compresses a disc spring and simultaneously pushes a piston rod to drive two brake arms to expand outwards, and the braking torque is eliminated; when the electromagnetic valve is reset after power failure, hydraulic oil flows back to the oil tank of the hydraulic station under the action of the spring force, and meanwhile, the spring force is applied to the brake disc through the brake arm through the piston rod to establish a set brake torque.
During long-term continuous operation of equipment, the response speed of the brake changes, and the matching error of electric braking and mechanical braking causes friction between a clamping part and a rotating part during braking of the brake, so that the brake is abraded. This accumulation of wear causes an increasing clearance of the clamping part from the rotating part, resulting in a decreasing torque that the brake can provide. If an emergency needs to be stopped immediately, the emergency is finished through mechanical braking of the brake, at this time, if the braking torque is insufficient, the situation that the stop is delayed or the stop is not finished can be caused, so that danger is brought or accidents are caused, and from the analysis of a large number of safety accidents of the crane, the safety accidents caused by the fact that the brake torque is insufficient always occupy a high proportion due to the fact that the equipment is long in service time and cannot be maintained.
In view of the above-mentioned related technologies, the inventor believes that, in the past, a brake is clasped, then a test heavy object is directly hoisted on a crane through a lifting rope, and the test heavy object falls to a limit value of a test braking torque when the weight reaches a certain value, belongs to a dangerous operation test, and the test process is dangerous, has a large risk, and has room for improvement.
Disclosure of Invention
In order to improve the limit value of the brake torque of the crane, which is used for testing the falling of a heavy object when the weight reaches a certain value, the method belongs to a dangerous operation test, and the test process is dangerous and has a large risk problem, the application provides a method and a system for detecting the brake torque of a crane brake, a storage medium and an intelligent terminal.
In a first aspect, the application provides a method for detecting braking torque of a crane brake, which adopts the following technical scheme:
a method for detecting braking torque of a crane brake comprises the following steps:
after a friction plate of the brake clamps a brake disc, increasing the output current of the frequency converter to drive the test rotating speed of the motor to increase;
acquiring current test torque information and rotation speed information of a brake disc;
judging whether the rotation speed information is greater than 0 and is unchanged;
if the current test torque is larger than 0 and is not changed, judging whether the torque value corresponding to the current test torque information is smaller than a preset torque safety value or not;
if the current test torque is smaller than the test torque, current test torque information and test failure information are output;
if so, outputting current test torque information and test passing information;
if not, judging whether the torque value corresponding to the current test torque information is equal to the preset maximum torque value information or not;
if yes, outputting test abnormal information;
if not, the current test torque information is continuously increased, and the rotation speed information is obtained.
Through adopting above-mentioned technical scheme, thereby make the rotational speed increase of motor through converter increase output current, can convert the test torque of motor this moment into, when the brake disc can't be embraced by the friction disc of stopper because of the atress is too big, the brake disc begins to rotate, so when the brake disc just begins to rotate, the test torque of motor just is equivalent to the braking torque of friction disc on the stopper, need not to test through the heavy object, has improved the security and the convenience that braking torque detected.
Optionally, the method for outputting the current test torque information includes:
opening the brake after detection and placing test adsorption paper in a gap between the friction plate and the brake disc;
acquiring the paper body rotation speed information when the test adsorption paper rotates along the surface of the brake disc;
judging whether the rotating speed corresponding to the paper body rotating speed information is smaller than preset reference rotating speed information or not;
if the rotating speed is smaller than the reference rotating speed information, outputting impurity alarm information and judging whether the rotating speed information of the paper body is unchanged;
if so, outputting the current test torque information after testing again;
if not, continuing to rotate until the rotation speed information is not changed, and then retesting;
and if the current torque is equal to the reference rotating speed information, directly outputting the current test torque information.
By adopting the technical scheme, the test adsorption paper is placed in the gap and rotates, so that whether impurities exist between the friction plate and the brake disc is detected, whether the detection result is accurate is judged, and the condition of misjudgment is reduced; on the other hand, the impurities are brought away from the position between the friction plate and the brake disc, the friction plate and the brake disc are cleaned, the fact that interference of external factors does not exist in the result of re-detection is guaranteed, and accuracy of the detection result is improved.
Optionally, the impurity warning information includes liquid impurities and solid impurities, and the method of outputting the impurity warning information includes:
opening the hot air blower at the lower side of the brake disc when the paper body rotation speed information is not changed, and defining the paper body rotation speed as the rotating speed information of the heaviest paper body when the paper body rotation speed information is not changed;
judging whether the paper body rotation speed information changes or not;
if yes, judging whether the paper body rotation speed information is equal to the reference rotation speed information or not;
if the reference rotating speed information is equal to the reference rotating speed information, outputting liquid impurity information;
if the reference rotating speed information is not equal to the reference rotating speed information, liquid impurity information and solid impurity information are output;
if not, solid impurity information is output.
By adopting the technical scheme, the type of the impurities is judged by opening the hot air blower, if the impurities are liquid, the impurities are volatilized under the action of the hot air blower and removed, if the impurities are solid, the impurities are not influenced, and when the types of the impurities are different, the friction force between the impurities and the impurities is changed differently, so that the impurities can be used for prejudging the magnitude of the true value of the test torque, the situations that the test is not needed are eliminated, the possibility of repeated tests is reduced, and the test rapidity is improved.
Optionally, when the impurity alarm information is liquid impurity information, the further method for outputting the liquid impurity information includes:
when the paper body rotation speed information changes, the temperature of the hot air blower is increased to a preset oil-water separation temperature;
acquiring current paper weight information, and defining the paper weight information before temperature rise as initial paper weight information;
judging whether the current paper weight information changes;
if the paper weight information changes, calculating a difference value between the current paper weight information and preset pure paper weight information, and defining the difference value as residual difference value information;
judging whether the residual difference information is equal to 0;
if yes, outputting water impurity information;
if not, outputting water-oil mixing information;
and if the oil content is not changed, outputting oil impurity information.
Through adopting above-mentioned technical scheme, through setting up the temperature in certain high temperature for the temperature on the paper is about 100 degrees centigrade, thereby makes water volatilize earlier and oil is difficult for volatilizing, thereby distinguishes water oil according to the residual mass, thereby confirms the cause that influences braking torque this moment, and convenience of customers adopts corresponding measure to deal with in actual work, has improved the influence of test result.
Optionally, when the impurity alarm information is solid impurity information, the method for outputting the solid impurity information includes:
before the test adsorption paper is placed in a gap between the friction plate and the brake disc, the test adsorption paper is rotated to an angle corresponding to the idle angle information to be fixed, and the brake disc is rotated;
acquiring current paper weight information of the test adsorption paper;
judging whether the current paper weight information is larger than the pure paper weight information or not when the current paper weight information is not changed;
if yes, rotating the test adsorption paper along the surface of the brake disc, continuously acquiring current paper body weight information of the test adsorption paper, and defining the current paper body weight information as final weight information;
judging whether the final weight information is equal to the current paper weight information or not when the final weight information is not changed;
if the weight information is equal to the current paper weight information, outputting the impurity information of the brake disc;
if the weight information is larger than the current paper weight information, outputting brake disc impurity information and friction plate impurity information;
if not, the impurity information of the friction plate is output.
Through adopting above-mentioned technical scheme, through putting the scraps of paper on the brake disc earlier, then put in the clearance between friction disc and brake disc to whether distinguish for impurity on the brake disc or impurity on the friction disc, thereby confirm that the influence factor of impurity produces where, have certain referential to subsequent work.
Optionally, the method for checking out the brake disc impurity information includes:
acquiring the information of the width of a gap between a friction plate and a brake disc and the information of the rotation direction of the brake disc;
performing matching analysis according to angle information and gap width information stored in a preset angle database to determine the rotation angles of the plectrums positioned at the front side and the back side of the paper and corresponding to the gap width information, defining the rotation angle corresponding to the plectrum at the front side as first plectrum angle information, and defining the angle corresponding to the plectrum at the back side as second plectrum angle information;
when the rotation direction of the brake disc is set to be clockwise, the front side shifting piece is rotated according to the angle information of the first shifting piece, and then real-time angle information of the front shifting piece is obtained;
judging whether the angle information of the real-time front shifting piece changes or not;
if the real-time front shifting piece angle information changes, when the rotating direction of the brake disc is anticlockwise, the rear shifting piece is rotated according to the second shifting piece angle information, and then real-time rear shifting piece angle information is obtained;
judging whether the angle information of the rear plectrum changes in real time;
if the angle information of the rear shifting piece changes in real time, the impurity information and the information which cannot be removed of the brake disc are output;
if the angle information of the rear shifting piece does not change in real time, outputting the impurity information and the removed information of the brake disc;
and if the real-time angle information of the front shifting piece is not changed, outputting the impurity information and the removed information of the brake disc.
Through adopting above-mentioned technical scheme, stir in order to stir the impurity on the circumference lateral wall of brake disc through setting up the plectrum in corresponding position to judge the condition that whether can get rid of, if for the condition that can't get rid of, then remind the user to come its manual removal, from not influencing subsequent experimental work, improved the reliability of experimental work.
Optionally, if the real-time rear pad shift angle information changes, the method for outputting the brake disc impurity information and the information which cannot be removed includes:
acquiring plectrum torque information, wherein the plectrum torque information comprises front plectrum torque information and rear plectrum torque information;
judging whether the plectrum torque information is equal to the maximum torque information or not;
if the torque is equal to the maximum torque information, moving the plectrums on the front side and the rear side of the paper back and forth along the axis direction of the brake disc and judging whether the angle information of the real-time front plectrum and the angle information of the real-time rear plectrum are changed again;
if at least one of the brake disc impurity information and the removed information is not changed, outputting the brake disc impurity information and the removed information;
if the two changes, the information of the impurities of the brake disc is output and the information cannot be removed;
and if the maximum torque information is not equal, continuously increasing the torque of the shifting piece to shift.
Through adopting above-mentioned technical scheme, through the increase moment of torsion and with plectrum back-and-forth movement to get rid of though the plectrum is all not shoveled iron fillings and the mistake thinks can't get rid of in the rotation of brake disc along clockwise and anticlockwise direction, reduce the artificial circumstances that removes the bits of user, practiced thrift the manpower, improved automation efficiency.
In a second aspect, the present application provides a crane brake braking torque detection system, which adopts the following technical scheme:
a crane brake braking torque detection system comprising:
after a friction plate of the brake clamps a brake disc, increasing the output current of the frequency converter to drive the test rotating speed of the motor to increase;
the moment acquisition module is used for acquiring current test moment information and rotation speed information of the brake disc;
the processing module is connected with the torque acquisition module and the judgment module and is used for storing and processing information;
the output module is connected with the processing module and used for outputting the test result information;
the judging module is used for judging whether the rotation speed information is larger than 0 and is unchanged;
if the judgment module judges that the torque value is larger than 0 and is unchanged, the judgment module judges whether the torque value corresponding to the current test torque information is smaller than a preset torque safety value or not;
if the judgment module judges that the current test torque is smaller than the test torque, the output module outputs current test torque information and test failure information;
if the judgment module judges that the current test torque is larger than the preset test torque, the output module outputs current test torque information and test passing information;
if the judgment module judges that the torque value is not greater than 0, the judgment module judges whether the torque value corresponding to the current test torque information is equal to the preset maximum torque value information or not;
if the judgment module judges that the test result is positive, the output module outputs test abnormal information;
if the judgment module judges that the current test torque information is not the same as the current test torque information, the processing module continues to increase the current test torque information and obtains the rotation speed information.
Through adopting above-mentioned technical scheme, thereby increase the rotational speed increase of making the motor through the converter increase output current, can convert the test torque of motor this moment, when the brake disc is because of the atress too big can't be embraced by the friction disc of stopper, the brake disc begins to rotate, so when the brake disc just begins to rotate, the test torque of motor just is equivalent to the brake torque of friction disc on the stopper, need not to test through the heavy object, has improved the security and the convenience that brake torque detected.
In a third aspect, the present application provides an intelligent terminal, which adopts the following technical scheme:
an intelligent terminal comprises a memory and a processor, wherein the memory is stored with a computer program which can be loaded by the processor and can execute any one of the crane brake braking torque detection methods.
Through adopting above-mentioned technical scheme, thereby make the rotational speed increase of motor through converter increase output current, can convert the test torque of motor this moment into, when the brake disc can't be embraced by the friction disc of stopper because of the atress is too big, the brake disc begins to rotate, so when the brake disc just begins to rotate, the test torque of motor just is equivalent to the braking torque of friction disc on the stopper, need not to test through the heavy object, has improved the security and the convenience that braking torque detected.
In a fourth aspect, the present application provides a computer-readable storage medium, which can store a corresponding program and has the characteristics of sensitive sensing and accurate data.
A computer readable storage medium adopts the following technical scheme:
a computer readable storage medium storing a computer program that can be loaded by a processor and executed to perform any of the above-described crane brake braking torque detection methods.
Through adopting above-mentioned technical scheme, thereby increase the rotational speed increase of making the motor through the converter increase output current, can convert the test torque of motor this moment, when the brake disc is because of the atress too big can't be embraced by the friction disc of stopper, the brake disc begins to rotate, so when the brake disc just begins to rotate, the test torque of motor just is equivalent to the brake torque of friction disc on the stopper, need not to test through the heavy object, has improved the security and the convenience that brake torque detected.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the testing torque of the motor is converted into the braking torque of the friction plate on the brake, and a heavy object is not needed for testing, so that the safety and convenience of braking torque detection are improved;
2. whether the detection result is accurate or not is judged by testing the adsorption paper, and the condition of misjudgment is reduced;
3. through the test adsorption paper, the friction plate and the brake disc are cleaned, no external factor interference exists in the result of retesting, and the accuracy of the detection result is improved.
Drawings
Fig. 1 is a flowchart of a method for detecting a brake torque of a crane brake in an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a crane brake braking torque detection device in an embodiment of the application.
Fig. 3 is a flowchart of a method of outputting current test torque information in an embodiment of the present application.
Fig. 4 is a flowchart of a method of outputting impurity warning information in the embodiment of the present application.
Fig. 5 is a flow chart of a further method of outputting liquid impurity information in an embodiment of the present application.
Fig. 6 is a flowchart of a method of outputting solid impurity information in the embodiment of the present application.
Fig. 7 is a flowchart of a verification method of output brake disc inclusion information in the embodiment of the present application.
Fig. 8 is a flowchart of a method of outputting brake disc contamination information and non-removable information in an embodiment of the present application.
Fig. 9 is a block diagram of a method for detecting a braking torque of a crane brake in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-9 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.
Referring to fig. 1, an embodiment of the present invention provides a method for detecting a braking torque of a crane brake, and a main flow of the method for detecting a braking torque of a crane brake is described as follows:
step 100: after a friction plate of the brake clamps a brake disc, the output current of the frequency converter is increased to drive the test rotating speed of the motor to be increased.
As shown in fig. 2, when the friction plate of the brake is clamped, the output current of the frequency converter is continuously increased, so that the torque generated on the motor shaft is continuously increased, when the torque reaches a certain degree, the friction force between the friction plate and the brake disc cannot hold the brake disc, the brake disc starts to rotate, and the output torque of the motor is the braking torque of the brake at the moment.
Step 101: and acquiring the current test torque information and the rotation speed information of the brake disc.
The current test torque information is the torque information output when the motor is driven by the driving force. The rotation speed information is the rotation speed information when the brake drives the brake disc to rotate after the moment of the motor output shaft reaches a certain degree, and the brake disc is in low-speed uniform rotation. The current test torque information can be obtained by controlling a torque controller of the frequency converter, so that the output torque of the motor can be detected. The rotational speed information may be acquired by a rotational speed sensor.
Step 102: and judging whether the rotation speed information is greater than 0 and is unchanged.
The purpose of the judgment is to determine whether the braking torque is achieved.
Step 1021: if the current test torque is larger than 0 and unchanged, judging whether the torque value corresponding to the current test torque information is smaller than a preset torque safety value.
The moment safety value is the magnitude of the moment required to be achieved by the corresponding model set manually so as to ensure the safety of the crane in use. If the measured torque is larger than 0, the brake torque is measured, and the test torque corresponding to the current test torque information is the brake torque of the brake. The purpose of the judgment is to determine whether the brake can be continuously used.
Step 1022: if not, judging whether the torque value corresponding to the current test torque information is equal to the preset maximum torque value information or not.
The maximum torque value information is the torque value information corresponding to the maximum power which can be output by the motor. Because the mechanical properties of the motor and the frequency converter are limited, the maximum value of the moment of the motor and the frequency converter is also limited. If the brake torque is not greater than 0, the brake torque of the brake is larger than the test torque. The purpose of the determination is to stop the test in order to determine whether the motor cannot continue to increase the test torque. If the maximum torque value information is reached, the fact that the braking torque of the test result is larger is indirectly shown.
Step 1031: and if so, outputting the current test torque information and the test passing information.
The test passing information is the information that the brake torque of the tested brake meets the safety requirement. If the brake torque is larger than the preset brake torque, the brake torque tested at the moment meets the requirement, and current test torque information and test passing information are output. The output mode can be a combination of digital display and light color change, for example, a green light represents the test passing information.
Step 1032: if the current test torque is smaller than the preset test torque, current test torque information and test failure information are output.
The test failure information is information that the brake torque of the tested brake does not meet the safety requirement. If the measured braking torque does not meet the requirement, current test torque information and test passing information are output. The output mode can be a combination of digital display and light color change, for example, a red light indicates that the test fails.
Step 1041: if yes, test exception information is output.
The test abnormality information indicates information that the braking torque cannot be measured. The mode of any representation form, such as text display, can be adopted. If the torque value is equal to the maximum torque value information, the test torque output by the motor and the frequency converter reaches the maximum and does not reach the braking torque at the moment, but cannot be continuously increased, so that the braking torque cannot be measured, and test abnormal information is output.
Step 1042: if not, the current test torque information is continuously increased, and the rotation speed information is obtained.
If not, the current test torque information is continuously increased and then whether the brake disc rotates or not is observed, which indicates that the current test torque information can be continuously increased at the moment.
Referring to fig. 3, the method of outputting current test torque information includes:
step 200: after the detection, the brake is opened and the test adsorption paper is put into the gap between the friction plate and the brake disc.
As shown in fig. 2, the brake is opened by a certain gap to put the adsorption paper in the middle, and the thickness of the adsorption paper is less than or equal to the width of the gap between the friction plate and the brake disc, so that impurities on the friction plate and the brake disc can be removed when the adsorption paper rotates. All have the steel wire around the adsorption paper to maintain the shape and the integrality of adsorption paper, be difficult for because of rotating or scraping the damaged deformation, the surface of adsorption paper has certain sponge structure, can take place certain deformation when the surface through impurity, also can resume original shape, and can be with steel impurity embedding in it and be difficult for dropping. A rotatable clamping mechanism is provided outside the brake to clamp the wire to drive the paper between the friction plate and the brake disc and even along the surface of the brake disc.
Step 201: and acquiring the paper body rotating speed information when the test adsorption paper rotates along the surface of the brake disc.
The paper rotation speed information is information of a rotation speed at which the paper rotates at a constant output power when the brake disk is stationary. The acquisition can be carried out by a rotating speed sensor.
Step 202: and judging whether the rotating speed corresponding to the paper body rotating speed information is smaller than the preset reference rotating speed information or not.
The reference rotating speed information is the rotating speed information of rotating paper moving at a constant speed only when the paper body and the steel wire are pure.
Step 2021: and if the current torque is equal to the reference rotating speed information, directly outputting the current test torque information.
If the current torque is equal to the reference rotating speed information, the fact that no other impurities exist on the adsorption paper at the moment is indicated, and the current test torque information can be directly output.
Step 2022: if the rotating speed is less than the reference rotating speed information, outputting impurity alarm information and judging whether the rotating speed information of the paper body is unchanged.
The foreign matter alarm information is information having foreign matter on the friction plate or the brake disc. The output mode can be a text output mode. If the rotation speed is less than the reference rotation speed information, the information indicates that an object is attached to the adsorption paper and affects the rotation speed of the paper body. The purpose of the judgment is to determine whether the paper body has cleaned the impurities on the friction plate or the brake disc.
Step 2031: if yes, the current test torque information is output after the test is carried out again.
If yes, the impurities in the test board are completely cleaned, and the test can be carried out again.
Step 2032: if not, continuing to rotate until the rotation speed information is not changed, and then retesting.
If not, the cleaning is continued if the cleaning is still performed at the moment. Note that the sheet rotation speed information is performed at a time when the detection result is not started after a certain time.
Referring to fig. 4, the impurity warning information includes liquid impurities and solid impurities, and the method of outputting the impurity warning information includes:
step 300: and opening the hot air blower at the lower side of the brake disc when the paper body rotation speed information is not changed, and defining the paper body rotation speed as the heaviest paper body rotation speed information when the paper body rotation speed information is not changed.
The heaviest paper body rotating speed information is information that all impurities are cleaned to the adsorption paper when the paper body rotating speed information is unchanged. The purpose of turning on the hot air blower is to evaporate the liquid above the absorbent paper.
Step 301: and judging whether the paper body rotation speed information changes or not.
The purpose of the judgment is to determine whether liquid impurities, such as oil and water, are present.
Step 3011: if yes, judging whether the paper body rotating speed information is equal to the reference rotating speed information.
If yes, the paper is indicated to have impurities on the paper removed from the paper under the action of the hot air blower.
Step 3012: if not, solid impurity information is output.
If there is no change, it indicates that there is no change in the impurities at this time. Because the possibility that impurities exist between the brake disc and the friction plate is oil, water or rust stains, and the oil and the water can volatilize at a certain temperature, only the rust stains possibly exist, and then solid impurity information is output.
Step 3021: and if the liquid impurity information is equal to the reference rotating speed information, outputting the liquid impurity information.
If equal, it indicates that all impurities have been removed at this time, so only liquid impurity information can be present.
Step 3022: and if the reference rotating speed information is not equal to the reference rotating speed information, outputting liquid impurity information and solid impurity information.
If not, the impurities still exist under the action of the hot air blower at the moment, but a part of the impurities is removed, and the liquid impurities and the solid impurities exist. It should be noted that the test is performed after the rotation speed of the paper body is stabilized, and the determination is not performed in the middle process. Here the case of evaporation due to wind and its own causes is ignored by default.
Referring to fig. 5, when the impurity warning information is liquid impurity information, a further method of outputting the liquid impurity information includes:
step 400: when the paper body rotation speed information changes, the temperature of the hot air blower is raised to the preset oil-water separation temperature.
The oil-water separation temperature is a temperature at which oil and water can be separated, for example, 100 ℃. When the temperature of the hot air blower rises to the temperature, if the adsorption paper has an oil-water mixture, the two can be separated. The purpose of this step is to distinguish between oil and water.
Step 401: and acquiring current paper weight information, and defining the paper weight information before temperature rise as initial paper weight information.
The first sheet weight information is information on the weight of the sheet in advance. The acquisition can be performed by a gravity sensor on a bracket for supporting the paper. Here, the intention is only to make a distinction more quickly, but also to verify the authenticity of the result of the above-described measurement according to the rotational speed. The purpose of obtaining is to check the volatilization condition in real time. Here, the case of volatilization due to wind and its own causes is ignored by default.
Step 402: and judging whether the current paper weight information changes.
The purpose of the judgment is to determine whether water is present in the liquid impurity.
Step 4021: and if the weight information of the current paper body is changed, calculating the difference value between the weight information of the current paper body and the preset weight information of the pure paper body, and defining the difference value as the residual difference value information.
The pure paper weight information is the paper weight information when only paper and steel wires exist and no other impurities exist. The remaining difference information is the weight difference between the weight of the sheet after the processing by the hot air blower and the weight of the pure paper sheet. The way of calculation is subtracting the two. If there is a change, it indicates that the impurities are volatilized by the hot air blown by the hot air blower and removed. The purpose of the judgment is to determine whether or not a residue is still present. The judging time is carried out after the current paper weight information on the paper is not changed after the long-time air blowing.
Step 4022: and if the oil content is not changed, outputting oil impurity information.
The oil impurity information is information that the impurity is oil. The output mode is character output. If there is no change, it indicates that there is no water impurity at this time, and the oil impurity information can be directly output.
Step 403: it is determined whether the remaining difference information is equal to 0.
If the residual difference is equal to 0, the paper at the moment is restored to the weight of the original pure paper, and no impurities exist.
Step 4031: if yes, water impurity information is output.
The water impurity information is information that the impurity is water. The output mode is character output. If yes, the impurities are completely volatilized at the moment, the rest is only pure paper, and only water can be volatilized under the temperature limit, so that the impurities above are water, and the output is water impurities. Not only can the impurities be identified here, but also the moisture can be removed by this method.
Step 4032: if not, outputting the water-oil mixing information.
The water-oil mixture information is information that impurities are both water and oil. The output mode is character output. If not 0, it means that a part of the volatile matter remains, and the remaining part is oil. Therefore, the existence of both oil and water is indicated, and the water-oil mixed information is output.
Referring to fig. 6, when the impurity warning information is the solid impurity information, the method of outputting the solid impurity information includes:
step 500: and before the test adsorption paper is placed in the gap between the friction plate and the brake disc, the test adsorption paper is rotated to the angle corresponding to the idle angle information to fix and rotate the brake disc.
In order to detect the position of the foreign matter, it is only brought into contact with the brake disk.
Step 501: and acquiring current paper weight information of the test adsorption paper.
The manner of acquisition is consistent with step 401.
Step 502: and judging whether the current paper weight information is larger than the pure paper weight information or not when the current paper weight information is not changed.
The purpose of the judgment is to determine whether or not rust is adsorbed. The judged time is when the weight of the current paper weight information is not changed.
Step 5021: if yes, the test adsorption paper rotates along the surface of the brake disc, current paper body weight information of the test adsorption paper is continuously obtained, and the current paper body weight information is defined as final weight information.
The final weight information is information for testing the weight of the sucked paper after a long time after the sucked paper is placed at the idle angle information and in the gap. If yes, the rust iron is adsorbed on the brake disc at the moment, and the rust iron is moved to the gap to continuously judge whether solid impurities exist on the brake disc.
Step 5022: if not, the impurity information of the friction plate is output.
The friction plate impurity information is information of impurities on the friction plate. The output mode is a text mode. If the weight information is not more than the weight information of the pure paper body, the foreign matter does not exist on the brake disc, but only exists on the friction plate because the solid foreign matter is detected in the previous step, and the foreign matter information of the friction plate is output.
Step 503: and judging whether the final weight information is equal to the current paper weight information or not when the final weight information is not changed.
The purpose of the judgment is to determine whether or not solid foreign matter is present on the friction plate when the adsorption paper passes between the friction plate and the brake disc.
Step 5031: and if the weight information is equal to the current paper weight information, outputting brake disc impurity information.
The brake disc impurity information is information that solid impurities exist in the brake disc. If the weight information is equal to the current paper weight information, the paper weight is not changed when the paper weight information is placed between the friction plate and the brake disc.
Step 5032: if the weight information is larger than the current paper weight information, the brake disc impurity information and the friction plate impurity information are output.
If the value is larger than the preset value, the fact that solid impurities exist on the friction plate at the moment is indicated, and impurities exist on the brake disc, and then brake disc impurity information and friction plate impurity information are output at the same time.
Referring to fig. 7: the checking method for outputting the brake disc impurity information comprises the following steps:
step 600: and acquiring the information of the width of the gap between the friction plate and the brake disc and the information of the rotation direction of the brake disc.
The clearance width information is information on the width of the clearance between the friction plate and the brake disc, and as shown in fig. 2, the friction plate and the brake disc are coaxial circular arcs and discs, and therefore the width therebetween is information on the difference in diameter between the friction plate and the brake disc. The sensor can be obtained by arranging a distance sensor on the friction sheet. The brake disk rotation direction information is information of the rotation direction of the brake disk. Such as clockwise or counterclockwise. The acquisition mode is directly judged through the rotation mode of the motor.
Step 601: and performing matching analysis according to the angle information and the gap width information stored in the preset angle database to determine the rotation angles of the plectrums positioned at the front side and the rear side of the paper and corresponding to the gap width information, defining the rotation angle corresponding to the plectrum at the front side as first plectrum angle information, and defining the angle corresponding to the plectrum at the rear side as second plectrum angle information.
The first shifting piece angle information is rotation angle information of the shifting piece at the front side covering the width corresponding to the whole gap width information. The second shifting piece angle information is the rotation angle information of the width corresponding to the whole gap width information of the shifting piece at the rear side. The first, second, front and rear sides are only information for one-to-one correspondence and indicating relative positions, and are not specific names. As shown in fig. 2, the first paddle angle information may be rotation angle information of the paddle on the upper side in the figure. The second plectrum angle information is the rotation angle information of the plectrum at the lower side in the figure. It sets up on the steel wire and the width is unanimous with the thickness of brake disc to scrape all solid impurity on the brake disc. The database stores the mapping relation of the first shifting piece angle information, the second shifting piece angle information and the gap width information. The data obtained by measurement after rotation by workers in the field according to actual conditions can also be obtained by calculation by workers in the field. When the system receives the gap width information, the shifting piece is automatically rotated so that the shifting piece can rotate according to the first shifting piece angle information and the second shifting piece angle information respectively.
Step 602: and when the rotation direction of the brake disc is set to be clockwise, the front side shifting piece is rotated according to the angle information of the first shifting piece, and then the angle information of the real-time front shifting piece is obtained.
The real-time front shifting piece angle information is the real-time rotation angle information of the front shifting piece. When the rotation direction of the brake disc is set to be clockwise, the angle of the front side shifting piece is as shown in fig. 2, and the rotation direction of the brake disc is an acute angle, so that the solid impurities on the brake disc are shoveled and adsorbed on the adsorption paper. When solid impurities exist on the front face and the front face is connected with the brake disc, the front side shifting piece tilts to move when the front side shifting piece cannot shovel, and angle information of the front shifting piece is changed. Therefore, real-time angle information of the front plectrum needs to be acquired at the moment. The acquisition mode is an angle sensor.
Step 603: and judging whether the angle information of the real-time front shifting piece changes.
The purpose of the judgment is to determine whether impurities on the brake disc are present and if so, can be removed.
Step 6031: and if the real-time front shifting piece angle information changes, rotating the rear shifting piece according to the second shifting piece angle information when the rotating direction of the brake disc is anticlockwise so as to obtain the real-time rear shifting piece angle information.
The real-time rear shifting piece angle information is real-time rotation angle information of the rear shifting piece. When the rotation direction of the brake disc is set to be anticlockwise, the angle of the rear shifting piece is as shown in fig. 2, and the rotation direction of the brake disc is an acute angle, so that the solid impurities on the brake disc are shoveled and adsorbed on the adsorption paper. When solid impurities exist on the upper surface and the upper surface is connected with the brake disc, the rear shifting piece tilts to move, so that the angle information of the rear shifting piece changes. Therefore, real-time rear plectrum angle information needs to be acquired at the moment. The acquisition mode is an angle sensor.
Step 6032: and if the real-time angle information of the front shifting piece is not changed, outputting the impurity information and the removed information of the brake disc.
The removed information is information that the front plectrum has scooped up and removed the impurities. If the brake disc is not changed, the foreign matter can be scooped up at this time, and the brake disc foreign matter information and the removed information are output.
Step 604: and judging whether the angle information of the rear shifting piece changes in real time.
The step 603 is the same, and is not described herein again.
Step 6041: if the angle information of the rear shifting piece changes in real time, the impurity information of the brake disc is output and the information cannot be removed.
The information that cannot be removed is information that is not removed but impurities are present. And if the two pieces of shifting pieces are changed, the impurities cannot be removed through the two shifting pieces, and the information of the impurities of the brake disc and the information which cannot be removed are output.
Step 6042: if the angle information of the rear shifting piece does not change in real time, the impurity information and the removed information of the brake disc are output.
Consistent with step 6032, further description is omitted here.
Referring to fig. 8, the method for outputting the information of the impurities of the brake disc and the information that cannot be removed if the real-time rear pad shift angle information changes includes:
step 700: acquiring plectrum torque information which comprises front plectrum torque information and rear plectrum torque information.
The plectrum moment of torsion information has the torsional spring on for the plectrum to order about the plectrum and laminate the brake disc, reduce the plectrum and rotate the condition in disorder because of rotating the in-process unstability. The acquisition mode is that the torque measuring sensor performs acquisition.
Step 701: and judging whether the plectrum torque information is equal to the maximum torque information or not.
The purpose of the judgment is to determine whether the torque has reached a maximum value and cannot be increased further to increase the shoveling force of the paddle.
Step 7011: if the torque is equal to the maximum torque information, the plectrums on the front side and the back side of the paper move back and forth along the axis direction of the brake disc, and whether the angle information of the real-time front plectrum and the angle information of the real-time back plectrum change is judged again.
If the difference is equal, it indicates that the solid foreign matter cannot be scooped up by increasing the adhering force of the paddles at this time, and there is a possibility that both sides of the solid foreign matter in the circumferential direction of the brake disc are connected to the brake disc to form the guide surface, and both sides in the axial direction are opened, so that the paddles on both the front and rear sides of the paper are moved back and forth in the axial direction of the brake disc to scoop up the solid foreign matter from the oblique direction when the brake disc rotates.
Step 7012: and if the maximum torque information is not equal, continuously increasing the torque of the shifting piece to shift.
If not, there is also a case where although the openings are on both sides of the brake disk in the direction toward, the torque is not large and scooping up is not possible, so that the torque is increased first to discharge the possibility.
Step 7021: and if at least one of the brake disc impurity information and the removed information is not changed, outputting the brake disc impurity information and the removed information.
If at least one of the brake disks is not changed, the brake disk foreign matter information and the removed information are output, which indicates that the brake disk foreign matter information and the removed information are scooped up at the moment.
Step 7022: if the brake disc impurity information and the brake disc impurity information are changed, the brake disc impurity information and the information which cannot be removed are output.
If the number of the brake disc impurities is changed, the situation that the impurities exist is indicated, but the impurities cannot be removed, and the brake disc impurities information and the information cannot be removed are output. The purpose is to exclude all-round scoopable situations in connection with the preceding steps.
Based on the same invention concept, the embodiment of the invention provides a crane brake braking torque detection system, which comprises:
referring to fig. 9, a crane brake braking torque detection system includes:
after a friction plate of the brake clamps a brake disc, increasing the output current of the frequency converter to drive the test rotating speed of the motor to increase;
a torque obtaining module 803, configured to obtain current test torque information and rotational speed information of the brake disc;
the processing module 801 is connected with the torque acquisition module 803 and the judgment module 802 and is used for storing and processing information;
the output module 804 is connected with the processing module 801 and is used for outputting the test result information;
the checking module 805 is connected with the processing module 801 and used for checking and outputting the brake disc impurity information;
a judging module 802, configured to judge whether the rotation speed information is greater than 0 and is unchanged;
if the judgment module 802 judges that the torque value is greater than 0 and is not changed, the judgment module 802 judges whether the torque value corresponding to the current test torque information is smaller than a preset torque safety value;
if the judgment module 802 judges that the current test torque is smaller than the test torque, the output module 804 outputs current test torque information and test failure information;
if the judgment module 802 judges that the current test torque is greater than the preset test torque, the output module 804 outputs current test torque information and test passing information;
if the judgment module 802 judges that the torque value is not greater than 0, the judgment module 802 judges whether the torque value corresponding to the current test torque information is equal to the preset maximum torque value information;
if the determination module 802 determines yes, the output module 804 outputs test exception information;
if the determination module 802 determines no, the processing module 801 continues to increase the current test torque information and acquire the rotation speed information.
Embodiments of the present invention provide a computer-readable storage medium storing a computer program that can be loaded by a processor and execute a method for detecting a braking torque of a crane brake.
Computer storage media include, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Based on the same inventive concept, the embodiment of the invention provides an intelligent terminal, which comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and can execute the method for detecting the brake torque of the crane brake.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (10)
1. A method for detecting braking torque of a crane brake is characterized by comprising the following steps:
after a friction plate of the brake clamps a brake disc, increasing the output current of the frequency converter to drive the test rotating speed of the motor to increase;
acquiring current test torque information and rotation speed information of a brake disc;
judging whether the rotation speed information is greater than 0 and is unchanged;
if the current test torque is larger than 0 and unchanged, judging whether the torque value corresponding to the current test torque information is smaller than a preset torque safety value;
if the current test torque is smaller than the test torque, outputting current test torque information and test failure information;
if the current test torque is larger than the preset test torque, outputting current test torque information and test passing information;
if not, judging whether the torque value corresponding to the current test torque information is equal to the preset maximum torque value information or not;
if yes, outputting test abnormal information;
if not, the current test torque information is continuously increased, and the rotation speed information is obtained.
2. The method for detecting the braking torque of the crane brake as claimed in claim 1, wherein the method for outputting the current test torque information comprises the following steps:
opening the brake after detection and placing test adsorption paper in a gap between the friction plate and the brake disc;
acquiring the paper body rotation speed information when the test adsorption paper rotates along the surface of the brake disc;
judging whether the rotating speed corresponding to the paper body rotating speed information is smaller than preset reference rotating speed information or not;
if the rotating speed is less than the reference rotating speed information, outputting impurity alarm information and judging whether the rotating speed information of the paper body is unchanged;
if so, outputting the current test torque information after testing again;
if not, continuing to rotate until the rotation speed information is not changed, and then retesting;
and if the current torque is equal to the reference rotating speed information, directly outputting the current test torque information.
3. The crane brake braking torque detection method as claimed in claim 2, wherein the foreign matter alarm information includes liquid foreign matter and solid foreign matter, and the method of outputting the foreign matter alarm information includes:
opening the hot air blower at the lower side of the brake disc when the paper body rotation speed information is not changed, and defining the paper body rotation speed as the rotating speed information of the heaviest paper body when the paper body rotation speed information is not changed;
judging whether the paper body rotation speed information changes or not;
if yes, judging whether the paper body rotating speed information is equal to the reference rotating speed information or not;
if the rotating speed is equal to the reference rotating speed information, outputting liquid impurity information;
if the reference rotating speed information is not equal to the reference rotating speed information, liquid impurity information and solid impurity information are output;
if not, solid impurity information is output.
4. The crane brake braking torque detection method according to claim 3, wherein when the impurity warning information is liquid impurity information, the further method of outputting the liquid impurity information includes:
when the paper body rotation speed information changes, the temperature of the hot air blower is increased to a preset oil-water separation temperature;
acquiring current paper weight information, and defining the paper weight information before temperature rise as initial paper weight information;
judging whether the current paper weight information changes;
if the paper weight information changes, calculating a difference value between the current paper weight information and preset pure paper weight information, and defining the difference value as residual difference value information;
judging whether the residual difference information is equal to 0 or not;
if yes, outputting water impurity information;
if not, outputting water-oil mixing information;
and if the oil content is not changed, outputting oil impurity information.
5. The method for detecting the brake torque of the crane brake as claimed in claim 3, wherein when the impurity warning information is solid impurity information, the method for outputting the solid impurity information comprises:
before the test adsorption paper is placed in a gap between the friction plate and the brake disc, the test adsorption paper is rotated to an angle corresponding to the idle angle information to be fixed, and the brake disc is rotated;
acquiring current paper weight information of the test adsorption paper;
judging whether the current paper weight information is larger than the pure paper weight information or not when the current paper weight information is not changed;
if yes, rotating the test adsorption paper along the surface of the brake disc, continuously acquiring current paper body weight information of the test adsorption paper, and defining the current paper body weight information as final weight information;
judging whether the final weight information is equal to the current paper weight information or not when the final weight information is not changed;
if the weight information is equal to the current paper weight information, outputting brake disc impurity information;
if the weight information is larger than the current paper weight information, outputting the impurity information of the brake disc and the impurity information of the friction plate;
if not, the impurity information of the friction plate is output.
6. The method for detecting the braking torque of the crane brake as claimed in claim 5, wherein the method for checking the output brake disc impurity information comprises:
acquiring the information of the width of a gap between a friction plate and a brake disc and the information of the rotation direction of the brake disc;
performing matching analysis according to the angle information and the gap width information stored in the preset angle database to determine the rotation angles of the plectrums positioned at the front side and the back side of the paper and corresponding to the gap width information, defining the rotation angle corresponding to the front plectrum as first plectrum angle information, and defining the angle corresponding to the back plectrum as second plectrum angle information;
when the rotation direction of the brake disc is set to be clockwise, the front side shifting piece is rotated according to the angle information of the first shifting piece, and then real-time angle information of the front shifting piece is obtained;
judging whether the angle information of the real-time front plectrum changes;
if the real-time front shifting piece angle information changes, when the rotating direction of the brake disc is anticlockwise, the rear shifting piece is rotated according to the second shifting piece angle information, and then real-time rear shifting piece angle information is obtained;
judging whether the real-time rear plectrum angle information changes or not;
if the angle information of the rear shifting piece changes in real time, the impurity information and the information which cannot be removed of the brake disc are output;
if the angle information of the rear shifting piece does not change in real time, outputting the impurity information and the removed information of the brake disc;
and if the real-time angle information of the front shifting piece is not changed, outputting the impurity information and the removed information of the brake disc.
7. The method for detecting the braking torque of the crane brake as claimed in claim 6, wherein if the real-time angle information of the rear plectrum changes, the method for outputting the information of the impurities of the brake disc and the information which cannot be removed comprises the following steps:
acquiring plectrum torque information, wherein the plectrum torque information comprises front plectrum torque information and rear plectrum torque information;
judging whether the plectrum torque information is equal to the maximum torque information or not;
if the torque is equal to the maximum torque information, the plectrums on the front side and the back side of the paper move back and forth along the axis direction of the brake disc, and whether the angle information of the real-time front plectrum and the angle information of the real-time back plectrum change is judged again;
if at least one of the brake disc impurity information and the removed information is not changed, outputting the brake disc impurity information and the removed information;
if the brake disc impurity information and the brake disc impurity information are changed, the information cannot be removed;
and if the maximum torque information is not equal, continuously increasing the torque of the shifting piece to shift.
8. A crane brake braking torque detection system, comprising:
after a friction plate of the brake clamps a brake disc, increasing the output current of the frequency converter to drive the test rotating speed of the motor to increase;
the moment acquisition module is used for acquiring current test moment information and rotation speed information of the brake disc;
the processing module is connected with the torque acquisition module and the judgment module and is used for storing and processing information;
the output module is connected with the processing module and used for outputting the test result information;
the judging module is used for judging whether the rotation speed information is larger than 0 and is unchanged;
if the judgment module judges that the torque value is larger than 0 and is unchanged, the judgment module judges whether the torque value corresponding to the current test torque information is smaller than a preset torque safety value or not;
if the judgment module judges that the current test torque is smaller than the test torque, the output module outputs current test torque information and test failure information;
if the judgment module judges that the current test torque is larger than the test torque, the output module outputs current test torque information and test passing information;
if the judgment module judges that the torque value is not greater than 0, the judgment module judges whether the torque value corresponding to the current test torque information is equal to the preset maximum torque value information or not;
if the judgment module judges that the test result is positive, the output module outputs test abnormal information;
if the judgment module judges that the current test torque information is not the same as the current test torque information, the processing module continues to increase the current test torque information and obtains the rotation speed information.
9. An intelligent terminal, comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and that executes the method of detecting a brake torque of a crane brake as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that a computer program is stored which can be loaded by a processor and which executes a method for detecting a crane brake braking torque according to any one of claims 1 to 7.
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