CN115318709B - Acid-base balance automatic impact cleaning system and method for new energy motor simulator and storage medium - Google Patents
Acid-base balance automatic impact cleaning system and method for new energy motor simulator and storage medium Download PDFInfo
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- CN115318709B CN115318709B CN202210808929.1A CN202210808929A CN115318709B CN 115318709 B CN115318709 B CN 115318709B CN 202210808929 A CN202210808929 A CN 202210808929A CN 115318709 B CN115318709 B CN 115318709B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 89
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- 239000012535 impurity Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000012153 distilled water Substances 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 7
- 239000002585 base Substances 0.000 claims description 59
- 239000002253 acid Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000010926 purge Methods 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000011010 flushing procedure Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
A new energy motor simulator acid-base balance automatic impact cleaning system, method and storage medium relate to the technical field of motor simulator maintenance and solve the problem of non-ideal descaling effect. An acid-base electromagnetic valve, a waterway electromagnetic valve and a gas circuit electromagnetic valve in the system control the opening and closing of the acid-base solution, distilled water and compressed air loops; the PH sensor detects the PH value of the cleaning liquid in real time, and the proportional valve controls the proportion of the acid-base solution entering the liquid storage tank so as to control the PH value of the cleaning liquid; the electromagnetic valve controls the on-off of the liquid loop and is matched with the gas circuit electromagnetic valve to form impact flow for flushing impurities; the flowmeter monitors the flow in the pipeline to prevent the circulating pump from idling, and compares the flow with a set value to control the output of the frequency converter in a closed loop manner so as to reach the set flow value; the silicon controlled trigger module controls the start and stop of the power supply loop, the PLC controller is used for automatic control of the system, and the touch screen is connected with the PLC controller through a TCP communication interface. The invention can be used for maintaining the motor simulator of the new energy inverter assembly test bed.
Description
Technical Field
The invention relates to the technical field of maintenance of motor simulators, in particular to an acid-base balance automatic impact cleaning technology of a new energy motor simulator.
Background
Along with the rapid development of new energy automobiles, the new energy test and verification bench is updated faster and faster, and the new energy inverter assembly test bench is a comprehensive test bench which can complete the performance, reliability and functional safety test and evaluation of the inverter assembly and can realize the functions of limit working condition reinforcement assessment, failure mode control strategy development and the like. The motor simulator is used as an important component of the test bed, and the state of the motor simulator influences whether the test bed can normally perform a test.
Among the state indexes of the motor simulator, the temperature of the power module is the most visual data index and is also a fault point with frequent problems. When the temperature exceeds the warning value, the scaling of the inner pipe wall of the backflow mechanism of the power module radiator is indicated, and the heat dissipation performance is reduced. Conventional solutions for this are generally means for descaling by pickling or for flushing the inner wall with water. In the acid washing mode, the scale is manually added according to experience, the actual acid-base concentration detection is not carried out, the severity degree of the scale formation of the pipe wall in the flow guide mechanism is difficult to judge, when the concentration of acid is increased, the flow guide mechanism of the radiator of the power module is corroded due to acid residue after cleaning, and equipment is damaged; when the acid concentration is insufficient, the acid cannot fully react with the scale, and is difficult to clean. In the water washing impact mode, only surface impurities can be removed, scale residues are difficult to remove, and an ideal result cannot be achieved.
Disclosure of Invention
The invention provides an acid-base balance automatic impact cleaning method for a new energy motor simulator, which aims to solve the problem of non-ideal descaling effect in the prior art.
The technical scheme of the invention is as follows:
The utility model provides a new energy motor simulator acid-base balance automatic impact cleaning system, includes proportional valve, acid-base solenoid valve, water route solenoid valve, gas route solenoid valve, liquid storage pot, PH sensor, circulating pump, solenoid valve, flowmeter, touch-sensitive screen, PLC controller, silicon controlled rectifier trigger module and converter;
The acid-base electromagnetic valve is used for controlling the switching of an acid-base solution loop; the waterway electromagnetic valve is used for controlling a distilled water loop switch; the air circuit electromagnetic valve is used for controlling a compressed air loop switch; the PH sensor is used for detecting the PH value of the cleaning liquid in real time and comparing the PH value with a set value, and the proportion of the acid solution and the alkali solution entering the liquid storage tank is controlled through the proportional valve, so that the PH value of the cleaning liquid is controlled; the electromagnetic valve is used for controlling the on-off of the liquid loop, and is matched with the gas circuit electromagnetic valve to form impact flow so as to flush the attached impurities; the flowmeter monitors the flow in the pipeline after the system circulates, prevents the circulating pump from idling, compares the flow with a set value, and controls the output of the frequency converter in a closed loop manner to reach the set flow value of the cleaning liquid; the controllable silicon trigger module is used for controlling the start and stop of a power supply loop, the PLC is used for automatic control of the system, and the touch screen is connected with the PLC through a TCP communication interface.
Preferably, the system further comprises a liquid level sensor for detecting the liquid level of the cleaning liquid in the liquid storage tank so as to ensure that enough cleaning liquid is supplied to the system for circulation.
Preferably, the device also comprises a temperature sensor and a heater, wherein the temperature sensor is used for monitoring the real-time temperature in the liquid storage tank, comparing the real-time temperature with a set value and controlling the temperature of the cleaning liquid in cooperation with the heater.
Preferably, the acquisition signals and the control signals of the PLC are acquired and output through digital DI and DO modules and analog AI and AO modules.
Preferably, the DI collects a scram signal of a scram button; the DO module is used for outputting control signals of the acid-base electromagnetic valve, the waterway electromagnetic valve, the gas circuit electromagnetic valve, the frequency converter and the silicon controlled rectifier triggering module; the AI module is used for collecting signals of the PH sensor, the temperature sensor, the flowmeter and the liquid level sensor, transmitting the data to the PLC, and transmitting the data to a display interface of the touch screen in a PROFINET communication mode; the AO module is used for outputting analog input signals of the comparison valve, the frequency converter and the silicon controlled rectifier trigger module.
The acid-base balance automatic impact cleaning method for the new energy motor simulator adopts the system as described above, and comprises the following steps:
s1, powering up a touch screen and a PLC controller, and resetting a program in the PLC controller once;
S2, selecting working conditions, and preparing the system before starting according to the corresponding working conditions;
S3, clicking the touch screen to start the equipment, sending a start signal to the PLC controller, and entering the next step;
S4, stopping adding liquid when the liquid level is greater than a set value when the selected working condition is an acid-base working condition or a waterway cleaning working condition, and closing an acid-base electromagnetic valve or a waterway electromagnetic valve; judging whether the liquid level is normal in the time t S through a PLC timing program and a liquid level sensor, if the liquid level is lower than a set value in the time t S, starting the system to stop suddenly and alarming, otherwise, entering the next step;
S5, outputting a 0-10 VDC signal by the PLC to a silicon controlled rectifier triggering module, starting a heater to control the temperature in the liquid storage tank, setting a maximum limit value T X, if the temperature is exceeded, considering that the heating in the liquid storage tank is faulty, stopping the heating of the heater at the moment, stopping a system program after T D time, generating an alarm prompt, and if no fault exists, entering the next step;
S6, starting a circulating pump, and enabling liquid in the liquid storage tank to enter the diversion mechanism through the circulating pump and the electromagnetic valve in sequence to finish cleaning; the flow is constant in operation condition, a flow value is set at the interface of the touch screen, a PLC (programmable logic controller) outputs a 0-10V DC signal to be given to a frequency converter, and the constant cleaning flow is ensured;
S7, detecting the flow of the cleaning loop through a flowmeter, setting a minimum alarm value F L, and triggering a system alarm and system scram once the flow is lower than the alarm value F L within t p after starting, stopping the heater and the circulating pump, and preventing the circulating pump from idling; if the actual flow is greater than the minimum alarm value F L, the next step can be carried out;
S8, the circulating pump enters a fixed frequency mode, the gas circuit electromagnetic valve and the electromagnetic valve enter an alternate switching working mode, gas-liquid impact is formed in a loop, and residual impurities on the surface of the flow guiding mechanism are removed;
s9, triggering a continuous liquid adding option to adjust the pH value to a set value if the pH set value is greatly different from an actual value after the operation for a certain time when the selected working condition is an acid-base cleaning working condition;
S10, clicking a touch screen end button, stopping the heater and the control program by the system, stopping detecting various alarms of the system, stopping the circulating pump, and enabling the valves to be in a closed state.
Preferably, step S2 further comprises:
(1) When the acid-base working condition is selected, the acid-base electromagnetic valve is opened, the waterway electromagnetic valve is closed, the gas circuit electromagnetic valve is closed, and according to the setting of the PH value, the proportional valve forms closed-loop control with the actual monitoring value of the PH sensor by adjusting, and liquid is filled into the liquid storage tank in proportion;
(2) When the waterway cleaning working condition is selected, the waterway electromagnetic valve is opened, the acid-base electromagnetic valve is closed, the waterway electromagnetic valve is closed, and distilled water starts to be filled into the liquid storage tank;
(3) When the purging working condition is selected, the gas circuit electromagnetic valve is opened, the acid-base electromagnetic valve and the waterway electromagnetic valve are closed, the electromagnetic valve in the system loop is closed, the purging of the flow guiding mechanism by compressed air is performed, when the flow monitored by the flowmeter is 0L/min, the purging is finished after 3 s.
Preferably, t S in step S4 is 180S, t D in step S5 is 30S, and t P in step S7 is 10S.
Preferably, in step S8, the alternately switching operation modes are specifically: the gas circuit electromagnetic valve is connected for 1s and disconnected for 3s; the electromagnetic valve is disconnected for 1s and connected for 3s; and so forth.
The invention also provides a computer readable storage medium for storing a computer program for executing the acid-base balance automatic impact cleaning method of the new energy motor simulator.
Compared with the prior art, the invention solves the problem of non-ideal descaling effect of the diversion mechanism of the simulator, and has the following specific beneficial effects:
1. the system provided by the invention utilizes the temperature sensor and combines the sensitivity of impurities to the temperature to realize the constant control of the temperature; the PH sensor and the acid-base control valve in the system form closed-loop control, the acid cleaning solution is reacted to realize strong solubility of impurities, so that moderate acidity is realized, the impurities attached to the radiating deflector of the cleaning clothes are fully softened, alkalinity neutralization is realized, the acidity on the surface of the radiator is fully neutralized and passivated, and alkalinity closed-loop is realized.
2. The invention solves the problem of impurity residue cleaning of the special structure radiating element of the power module of the new energy motor simulator, sets various modes such as temperature closed loop, acidity closed loop, impact closed loop flushing and the like and emergency stop protection measures, has safe and reliable system operation, and can be applied to maintenance and repair of the motor simulator of the new energy inverter assembly test bed.
Drawings
FIG. 1 is a schematic diagram of a new energy motor simulator acid-base balance automatic impact cleaning system;
FIG. 2 is a schematic diagram of the acquisition and control signal paths of the PLC controller of example 5;
FIG. 3 is a schematic diagram of the main circuit of the acid-base equilibrium automatic impact cleaning system according to example 5;
Fig. 4 is a schematic flow chart of an acid-base balance automatic impact cleaning method of the new energy motor simulator.
Detailed Description
In order to make the technical solution of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it should be noted that the following embodiments are only used for better understanding of the technical solution of the present invention, and should not be construed as limiting the present invention.
Example 1.
The embodiment provides an acid-base balance automatic impact cleaning system of a new energy motor simulator, which is shown in fig. 1 and comprises a proportional valve, an acid-base electromagnetic valve, a waterway electromagnetic valve, a gas circuit electromagnetic valve, a liquid storage tank, a PH sensor, a circulating pump, an electromagnetic valve, a flowmeter, a touch screen, a PLC controller, a silicon controlled rectifier triggering module and a frequency converter;
The acid-base electromagnetic valve is used for controlling the switching of an acid-base solution loop; the waterway electromagnetic valve is used for controlling a distilled water loop switch; the air circuit electromagnetic valve is used for controlling a compressed air loop switch; the PH sensor is used for detecting the PH value of the cleaning liquid in real time and comparing the PH value with a set value, and the proportion of the acid solution and the alkali solution entering the liquid storage tank is controlled through the proportional valve, so that the PH value of the cleaning liquid is controlled; the electromagnetic valve is used for controlling the on-off of the liquid loop, and is matched with the gas circuit electromagnetic valve to form impact flow so as to flush the attached impurities; the flowmeter monitors the flow in the pipeline after the system circulates, prevents the circulating pump from idling, compares the flow with a set value, and controls the output of the frequency converter in a closed loop manner to reach the set flow value of the cleaning liquid; the controllable silicon trigger module is used for controlling the start and stop of a power supply loop, the PLC is used for automatic control of the system, and the touch screen is connected with the PLC through a TCP communication interface.
In the embodiment, closed-loop control is formed by a PH sensor and an acid-base control valve in the system, and the acid solution is weak acid and is mainly used for cleaning and softening residual impurities on the surface of the diversion mechanism; the alkali solution is weak base and is mainly used for neutralizing residual acid on the surface of the diversion mechanism and preventing the mechanism from being corroded by the residual acid; distilled water is mainly used for cleaning the inside of the mechanism and diluting acid-base residues; the compressed air is mainly used for completing impact cleaning in cooperation with loop control, and purging of the inside of the mechanism is completed after each mode is finished. The acid cleaning solution has strong solubility to impurities through reaction, realizes moderate acidity, fully softens impurities attached to the heat dissipation deflector of the cleaning clothes, realizes alkalinity neutralization, fully neutralizes and passivates the acidity of the surface of the radiator, realizes alkalinity closed loop, can fully remove residual dirt in the deflector mechanism, can realize acid-base neutralization, avoids acid and alkali residues from corroding the deflector mechanism, and simultaneously achieves the aim of thorough cleaning.
Example 2.
This embodiment is a further limitation of embodiment 1, the system further comprising a liquid level sensor for detecting a liquid level of the cleaning liquid in the liquid storage tank to ensure that sufficient cleaning liquid is available for the system to circulate.
Example 3.
This embodiment is further defined in embodiment 2, wherein the system further comprises a temperature sensor and a heater, and the temperature sensor is configured to monitor a real-time temperature in the liquid storage tank, compare the real-time temperature with a set value, and cooperatively control the temperature of the cleaning liquid with the heater.
Example 4.
This embodiment is further defined in embodiment 3, where the collection signal and the control signal of the PLC controller are collected and output through digital DI and DO modules and analog AI and AO modules.
Example 5.
This embodiment is further defined in embodiment 4, as shown in fig. 2, wherein the DI collects a scram signal of the scram button;
the DO module is used for outputting control signals of the acid-base electromagnetic valve, the waterway electromagnetic valve, the gas circuit electromagnetic valve, the frequency converter and the silicon controlled rectifier triggering module;
The AI module is used for collecting signals of the PH sensor, the temperature sensor, the flowmeter and the liquid level sensor, transmitting the data to the PLC, and transmitting the data to a display interface of the touch screen in a PROFINET communication mode;
The AO module is used for outputting analog input signals of the comparison valve, the frequency converter and the silicon controlled rectifier trigger module.
More specifically, the acid-base balance automatic impact cleaning system of the new energy motor simulator consists of four parts of main circuits, wherein as shown in fig. 3, the first part is an input power circuit for supplying power to the outside 380V, and Q1 is used as a total circuit breaker of the system; the second part is a 380V-to-24V variable-voltage power supply loop, the output end supplies power to the touch screen 18 and the PLC 19, and the F1 and F2 fuses provide overcurrent protection for the loop; the third part is a regenerative heater loop, the heater adjusts the two-phase on-off frequency of SCRT (silicon controlled rectifier) through the AO output of the PLC controller 19 by 0-10V, the purpose of controlling the fixed temperature of the liquid storage tank 9 is achieved, KM1 is an on-off contactor of the heater, when heating is started, a main contactor KM1 is connected, HR1 starts heating, when heating is stopped, the contactor is disconnected, HR1 stops heating, and F4, F5 and F6 provide overcurrent protection for the whole loop; the fourth part is a variable-frequency speed regulation loop part, Q2 is used as a protection breaker of the loop, VVF is a frequency converter, the start and stop of the circulating pump 14 are controlled by the on-off control of the relay KA1 through the PLC 19, meanwhile, the output frequency of the frequency converter VVF is controlled through the AO output of the PLC 19, and the constant flushing flow is ensured through the rotating speed of the circulating pump 14.
Example 6.
The embodiment provides a new energy motor simulator acid-base balance automatic impact cleaning method, the flow chart of the method is shown in fig. 4, the system according to any one of embodiments 1-5 is applied, and the method comprises the following steps:
s1, powering up a touch screen and a PLC controller, and resetting a program in the PLC controller once;
S2, selecting working conditions, and preparing the system before starting according to the corresponding working conditions;
S3, clicking the touch screen to start the equipment, sending a start signal to the PLC controller, and entering the next step;
S4, stopping adding liquid when the liquid level is greater than a set value when the selected working condition is an acid-base working condition or a waterway cleaning working condition, and closing an acid-base electromagnetic valve or a waterway electromagnetic valve; judging whether the liquid level is normal in the time t S through a PLC timing program and a liquid level sensor, if the liquid level is lower than a set value in the time t S, starting the system to stop suddenly and alarming, otherwise, entering the next step;
S5, outputting a 0-10 VDC signal by the PLC to a silicon controlled rectifier triggering module, starting a heater to control the temperature in the liquid storage tank, setting a maximum limit value T X, if the temperature is exceeded, considering that the heating in the liquid storage tank is faulty, stopping the heating of the heater at the moment, stopping a system program after T D time, generating an alarm prompt, and if no fault exists, entering the next step;
S6, starting a circulating pump, and enabling liquid in the liquid storage tank to enter the diversion mechanism through the circulating pump and the electromagnetic valve in sequence to finish cleaning; the flow is constant in operation condition, a flow value is set at the interface of the touch screen, a PLC (programmable logic controller) outputs a 0-10V DC signal to be given to a frequency converter, and the constant cleaning flow is ensured;
S7, detecting the flow of the cleaning loop through a flowmeter, setting a minimum alarm value F L, and triggering a system alarm and system scram once the flow is lower than the alarm value F L within t p after starting, stopping the heater and the circulating pump, and preventing the circulating pump from idling; if the actual flow is greater than the minimum alarm value F L, the next step can be carried out;
S8, the circulating pump enters a fixed frequency mode, the gas circuit electromagnetic valve and the electromagnetic valve enter an alternate switching working mode, gas-liquid impact is formed in a loop, and residual impurities on the surface of the flow guiding mechanism are removed;
s9, triggering a continuous liquid adding option to adjust the pH value to a set value if the pH set value is greatly different from an actual value after the operation for a certain time when the selected working condition is an acid-base cleaning working condition;
S10, clicking a touch screen end button, stopping the heater and the control program by the system, stopping detecting various alarms of the system, stopping the circulating pump, and enabling the valves to be in a closed state.
The cleaning method provided by the embodiment sets various modes such as temperature closed loop, acidity closed loop, impact closed loop flushing and the like and emergency stop protection measures, is safe and reliable in system operation, and can be applied to maintenance of the motor simulator of the new energy inverter assembly test bed.
Example 7.
This embodiment is a further limitation of embodiment 6, step S2 further comprising:
(1) When the acid-base working condition is selected, the acid-base electromagnetic valve is opened, the waterway electromagnetic valve is closed, the gas circuit electromagnetic valve is closed, and according to the setting of the PH value, the proportional valve forms closed-loop control with the actual monitoring value of the PH sensor by adjusting, and liquid is filled into the liquid storage tank in proportion;
(2) When the waterway cleaning working condition is selected, the waterway electromagnetic valve is opened, the acid-base electromagnetic valve is closed, the waterway electromagnetic valve is closed, and distilled water starts to be filled into the liquid storage tank;
(3) When the purging working condition is selected, the gas circuit electromagnetic valve is opened, the acid-base electromagnetic valve and the waterway electromagnetic valve are closed, the electromagnetic valve in the system loop is closed, the purging of the flow guiding mechanism by compressed air is performed, when the flow monitored by the flowmeter is 0L/min, the purging is finished after 3 s.
Example 8.
This example is a further limitation of example 6, wherein t S is 180S in step S4, t D is 30S in step S5, and t P is 10S in step S7.
Example 9.
This embodiment is further defined in embodiment 6, and the alternately switching operation modes in step S8 specifically include: the gas circuit electromagnetic valve is connected for 1s and disconnected for 3s; the electromagnetic valve is disconnected for 1s and connected for 3s; and so forth.
Example 10.
The present embodiment provides a computer-readable storage medium for storing a computer program for executing the acid-base balance automatic impact cleaning method of the new energy motor simulator according to any one of embodiments 6 to 9.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (6)
1. The acid-base balance automatic impact cleaning method for the new energy motor simulator is characterized by comprising a proportional valve, an acid-base electromagnetic valve, a waterway electromagnetic valve, a gas circuit electromagnetic valve, a liquid storage tank, a PH sensor, a circulating pump, an electromagnetic valve, a flowmeter, a touch screen, a PLC (programmable logic controller), a silicon controlled trigger module and a frequency converter;
The acid-base electromagnetic valve is used for controlling the switching of an acid-base solution loop; the waterway electromagnetic valve is used for controlling a distilled water loop switch; the air circuit electromagnetic valve is used for controlling a compressed air loop switch; the PH sensor is used for detecting the PH value of the cleaning liquid in real time and comparing the PH value with a set value, and the proportion of the acid solution and the alkali solution entering the liquid storage tank is controlled through the proportional valve, so that the PH value of the cleaning liquid is controlled; the electromagnetic valve is used for controlling the on-off of the liquid loop, and is matched with the gas circuit electromagnetic valve to form impact flow so as to flush the attached impurities; the flowmeter monitors the flow in the pipeline after the system circulates, prevents the circulating pump from idling, compares the flow with a set value, and controls the output of the frequency converter in a closed loop manner to reach the set flow value of the cleaning liquid; the controllable silicon trigger module is used for controlling the start and stop of a power supply loop, the PLC is used for automatically controlling the system, and the touch screen is connected with the PLC through a TCP communication interface;
the acid-base balance automatic impact cleaning method of the new energy motor simulator comprises the following steps of:
s1, powering up a touch screen and a PLC controller, and resetting a program in the PLC controller once;
S2, selecting working conditions, and preparing the system before starting according to the corresponding working conditions;
S3, clicking the touch screen to start the equipment, sending a start signal to the PLC controller, and entering the next step;
S4, stopping adding liquid when the liquid level is greater than a set value when the selected working condition is an acid-base working condition or a waterway cleaning working condition, and closing an acid-base electromagnetic valve or a waterway electromagnetic valve; judging whether the liquid level is normal in the time t S through a PLC timing program and a liquid level sensor, if the liquid level is lower than a set value in the time t S, starting the system to stop suddenly and alarming, otherwise, entering the next step;
S5, outputting a 0-10 VDC signal by the PLC to a silicon controlled rectifier triggering module, starting a heater to control the temperature in the liquid storage tank, setting a maximum limit value T X, if the temperature is exceeded, considering that the heating in the liquid storage tank is faulty, stopping the heating of the heater at the moment, stopping a system program after T D time, generating an alarm prompt, and if no fault exists, entering the next step;
S6, starting a circulating pump, and enabling liquid in the liquid storage tank to enter the diversion mechanism through the circulating pump and the electromagnetic valve in sequence to finish cleaning; the flow is constant in operation condition, a flow value is set at the interface of the touch screen, a PLC (programmable logic controller) outputs a 0-10V DC signal to be given to a frequency converter, and the constant cleaning flow is ensured;
S7, detecting the flow of the cleaning loop through a flowmeter, setting a minimum alarm value F L, and triggering a system alarm and system scram once the flow is lower than the alarm value F L within t p after starting, stopping the heater and the circulating pump, and preventing the circulating pump from idling; if the actual flow is greater than the minimum alarm value F L, the next step can be carried out;
S8, the circulating pump enters a fixed frequency mode, the gas circuit electromagnetic valve and the electromagnetic valve enter an alternate switching working mode, gas-liquid impact is formed in a loop, and residual impurities on the surface of the flow guiding mechanism are removed;
s9, triggering a continuous liquid adding option to adjust the pH value to a set value if the pH set value is greatly different from an actual value after the operation for a certain time when the selected working condition is an acid-base cleaning working condition;
s10, clicking an end button of the touch screen, stopping a heater and a control program by the system, stopping detecting various alarms of the system, stopping a circulating pump, and enabling various valves to enter a closed state;
Step S2 further comprises:
(1) When the acid-base working condition is selected, the acid-base electromagnetic valve is opened, the waterway electromagnetic valve is closed, the gas circuit electromagnetic valve is closed, and according to the setting of the PH value, the proportional valve forms closed-loop control with the actual monitoring value of the PH sensor by adjusting, and liquid is filled into the liquid storage tank in proportion;
(2) When the waterway cleaning working condition is selected, the waterway electromagnetic valve is opened, the acid-base electromagnetic valve is closed, the waterway electromagnetic valve is closed, and distilled water starts to be filled into the liquid storage tank;
(3) When a purging working condition is selected, the gas circuit electromagnetic valve is opened, the acid-base electromagnetic valve and the waterway electromagnetic valve are closed, the electromagnetic valve in the system loop is closed at the same time, purging of compressed air to the diversion mechanism is carried out, when the flow monitored by the flowmeter is 0L/min, the purging is finished after 3s of time delay;
the acquisition signal and the control signal of the PLC are acquired and output through a digital DI module, a digital DO module, an analog AI and an analog AO module;
the digital DI module is used for collecting an emergency stop signal of the emergency stop button; the digital DO module is used for outputting control signals of the acid-base electromagnetic valve, the waterway electromagnetic valve, the gas circuit electromagnetic valve, the frequency converter and the silicon controlled rectifier triggering module; the analog AI module is used for collecting signals of the PH sensor, the temperature sensor, the flowmeter and the liquid level sensor, transmitting the data to the PLC, and transmitting the data to a display interface of the touch screen in a PROFINET communication mode; the analog quantity AO module is used for outputting analog quantity input signals of the comparison valve, the frequency converter and the silicon controlled rectifier trigger module.
2. The method for automatic impact cleaning of acid-base balance of new energy motor simulator according to claim 1, further comprising a liquid level sensor for detecting the liquid level of the cleaning liquid in the liquid storage tank to ensure that sufficient cleaning liquid is supplied to the system for circulation.
3. The automatic impact cleaning method for the acid-base balance of the new energy motor simulator according to claim 2, further comprising a temperature sensor and a heater, wherein the temperature sensor is used for monitoring the real-time temperature in the liquid storage tank, comparing the real-time temperature with a set value and controlling the temperature of the cleaning liquid in cooperation with the heater.
4. The method for automatically cleaning the acid-base balance of the new energy motor simulator according to claim 1, wherein t S in the step S4 is 180S, t D in the step S5 is 30S, and t P in the step S7 is 10S.
5. The method for automatically cleaning the acid-base balance of the new energy motor simulator according to claim 1, wherein the alternately switching operation mode in step S8 is specifically: the gas circuit electromagnetic valve is connected for 1s and disconnected for 3s; the electromagnetic valve is disconnected for 1s and connected for 3s; and so forth.
6. A computer readable storage medium storing a computer program for executing the new energy motor simulator acid-base equilibrium automatic impact cleaning method according to any one of claims 1 to 5.
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