Collaborative adjustment method and system for oil supply and return system of horizontal sliding table of vibrating table

Abstract

The invention discloses a collaborative regulation method and system for an oil supply and return system of a horizontal sliding table of a vibrating table, and belongs to the technical field of vibrating tables. According to the method, a liquid level sensor and a temperature sensor are arranged in a horizontal sliding table of a vibration table, an oil liquid level value and an oil outlet temperature value are collected, respective change rates are calculated, whether the liquid level exceeds a limit or not is judged, and if yes, protective adjustment is carried out; if not, the temperature-liquid level change rate influence is comprehensively utilized, and the opening degree of an oil inlet electromagnetic proportional valve and the opening degree of an oil outlet electromagnetic proportional valve are calculated and cooperatively adjusted. The temperature of the oil in the horizontal sliding table and the change rate of the temperature are introduced into the liquid level control loop, prediction and compensation of the dynamic trend of the liquid level of the oil in the horizontal sliding table are achieved, and the problems of insufficient liquid level control precision, oscillation and potential safety hazards caused by neglecting temperature disturbance in a traditional open type oil return mode are effectively solved.

Description

Technical Field

[0001] This application relates to the field of vibration table technology, specifically to a method and system for coordinated adjustment of the oil supply and return system of a vibration table horizontal slide. Background Technology

[0002] A vibration table is a key piece of equipment for conducting product vibration and environmental reliability tests. To test large, heavy specimens, a horizontal slide is typically added to the vibration table, supported by multiple T-shaped hydraulic rails. The hydraulic system continuously supplies pressurized oil to the rails to form a load-bearing oil film. The stability of the oil level directly affects the safe operation of the slide and the reliability of the test. If the oil level is too high, oil will splash out of the horizontal slide as the rails slide, requiring the test to be interrupted; if the oil level is too low, air will mix into the hydraulic oil, causing emulsification, significantly shortening the hydraulic oil's lifespan, and reducing the load-bearing capacity of the rails. Therefore, it is necessary to regulate and control the oil level.

[0003] The horizontal slide of a vibration table typically supplies oil to the T-shaped hydraulic guide rails via a supply system, while the oil in the guide rails is simultaneously drawn out through a return system, thus ensuring that the oil level in the T-shaped hydraulic guide rails remains within a reasonable range. In actual use, the hydraulic temperature control within the horizontal slide of the vibration table often relies primarily on manual experience to adjust the opening of the electromagnetic proportional valves in the supply and return systems. However, during actual testing, the oil temperature of the horizontal slide is easily affected by the external environment or operating conditions, causing significant fluctuations in the hydraulic oil temperature. Dynamic changes in oil temperature affect oil flow rate through viscosity. In such cases, using a fixed opening of the electromagnetic proportional valves in the supply and return systems can lead to continuous fluctuations in the oil level, potentially causing the oil level to be too low or too high, affecting the operational safety and testing reliability of the horizontal slide. Therefore, a method for adjusting the supply and return systems of the horizontal slide that can adapt to changes in oil temperature is needed to ensure accurate oil level control within the horizontal slide under varying operating conditions. Summary of the Invention

[0004] To overcome the above-mentioned technical defects, this application provides a method for coordinated adjustment of the oil supply and return system of a vibration table horizontal slide, comprising the following steps:

[0005] Step S1: Install a temperature sensor at the oil outlet of the oil source in the oil supply and return system of the vibration table, and install an oil level sensor in the hydraulic oil of the horizontal slide table.

[0006] Step S2: Start the system. From the start of the vibration table operation, every sampling period... Oil level value is obtained by collecting data from the liquid level sensor. The oil temperature value is obtained by collecting data from the oil outlet temperature sensor. The rate of change of liquid level is calculated starting from the second sampling period. and rate of temperature change ,in The sampling sequence number;

[0007] Step S3: Monitor liquid level With the preset upper limit liquid level and lower limit liquid level The size relationship, if ≥ or If the liquid level returns to normal, protective adjustments will be made by inputting different opening commands to the inlet and outlet solenoid proportional valves until the liquid level returns to normal.

[0008] Step S4: If the liquid level is not exceeded, then based on the rate of change of liquid level... The reference level of the oil. Reference temperature value of oil and rate of temperature change Calculate the overall rate of change of liquid level and temperature and according to With upper threshold and lower threshold The comparison results show that the opening of the inlet solenoid proportional valve is adjusted in a coordinated manner. and the opening degree of the oil outlet solenoid proportional valve This is to achieve dynamic stability of the liquid level.

[0009] As a preferred embodiment of this application, the sampling period described in step S2 is... The value range is 1~1.5min.

[0010] As a preferred embodiment of this application, the specific method of protective adjustment in step S3 is as follows:

[0011] When detected ≥ At that time, input the opening degree to the oil inlet solenoid proportional valve. Command to input opening degree to the oil outlet solenoid proportional valve Instructions, among which The value range is 10% to 15%. The value range is 80%~85%, and ; thereafter, the liquid level change was continuously monitored until the [number]th [day / month]. Oil level value for each sampling period satisfy At that time, among them Then proceed to step S4;

[0012] when ≤ At that time, input the opening degree to the oil inlet solenoid proportional valve. Command to input opening degree to the oil outlet solenoid proportional valve The instruction was given, and the liquid level was continuously monitored until the [number]th [day / time]. Oil level value for each sampling period satisfy At that time, among them Then proceed to step S4.

[0013] As a preferred embodiment of this application, the system-preset balance reference opening of the oil inlet electromagnetic proportional valve in step S4 is... The value range is 55%~60%, and the balance reference opening of the oil outlet electromagnetic proportional valve is... The value range is 55% to 60%.

[0014] As a preferred embodiment of this application, the reference liquid level value of the oil in step S4 is... The value range is 30mm~35mm, and the reference temperature value of the oil is... The value range is 50℃~55℃.

[0015] As a preferred embodiment of this application, the comprehensive change rate of liquid level temperature in step S4 is... upper threshold The value range is 1.0~1.5, and the lower threshold is... The value range is 0.7 to 0.8, and > .

[0016] As a preferred embodiment of this application, the extreme value of the liquid level change rate in step S4 is... The value range is 5~8 mm / min, and the extreme value of the temperature change rate is... The value range is 12~15℃ / min.

[0017] As a preferred embodiment of this application, step S4 is based on... The specific methods for adjusting the valve opening include:

[0018] like This indicates that the rate of change of liquid level plays a dominant role in influencing the liquid level at this time. Therefore, based on the rate of change of liquid level... Adjust the opening of the inlet and outlet electromagnetic proportional valves to further determine... Positive and negative: If ≥0 indicates that the liquid level has an upward trend. , ;like This indicates that the liquid level is trending downwards. , ;

[0019] like This indicates that the rate of temperature change plays a dominant role in the influence of liquid level at this point, and further analysis is needed. Adjust the opening of the inlet and outlet electromagnetic proportional valves to further determine the cause. The sign depends on the rate of temperature change. Adjust the opening of the inlet and outlet electromagnetic proportional valves: If This indicates that the liquid level is trending downwards. , ;like This indicates that the liquid level is trending upward. , ;

[0020] like This indicates that the rate of change of liquid level and the rate of change of temperature have roughly the same effect on the liquid level. , .

[0021] This application also provides a hydraulic supply and return system for a horizontal slide of a vibration table, used to implement the aforementioned coordinated adjustment method for a hydraulic supply and return system for a horizontal slide of a vibration table, comprising:

[0022] A level sensor is installed in the hydraulic oil of the horizontal slide to detect the oil level.

[0023] A temperature sensor is installed at the oil outlet of the oil source to detect the oil temperature.

[0024] The upper and lower limit liquid levels are marked in the hydraulic oil of the horizontal slide as visual reference marks for the safe range of liquid levels.

[0025] The inlet solenoid proportional valve and the outlet solenoid proportional valve are connected to the inlet oil pipeline and the return oil pipeline, respectively, and are used to regulate the supply and return oil flow rates.

[0026] The control unit is configured to perform steps S2 to S4 as described in claim 1, calculating the liquid level change rate based on the liquid level value detected by the liquid level sensor and the temperature value detected by the temperature sensor. and rate of temperature change And coordinately adjust the opening degree of the oil inlet electromagnetic proportional valve. and the opening degree of the oil outlet electromagnetic proportional valve .

[0027] The advantages of this application compared to existing technologies are:

[0028] 1. Dual-parameter collaborative sensing for more precise control decisions: The collaborative adjustment method of the horizontal slide oil supply and return system of the vibration table proposed in this invention can simultaneously sense the dynamic changes in liquid level and temperature. By incorporating the liquid level change rate and temperature change rate into the control decision in a synchronized manner, the system's judgment of the current working condition is more comprehensive and accurate, overcoming the limitations of previous adjustments that relied solely on a single parameter.

[0029] 2. Dynamic weight allocation for smoother adjustment: The collaborative adjustment method of the horizontal slide oil supply and return system of the vibration table proposed in this invention realizes a continuous and smooth valve adjustment process. By dynamically calculating the opening degree of the two valves based on the ratio of the rate of change, the system can adjust the oil supply and return flow in real time and synchronously when the liquid level fluctuates, effectively avoiding liquid level overshoot and continuous oscillation caused by response lag in traditional control methods.

[0030] 3. Adaptive to changing working conditions, resulting in higher system reliability: The collaborative adjustment method of the hydraulic system supply and return oil system of the horizontal slide of the vibration table proposed in this invention significantly improves the operational reliability of the hydraulic system. Through the collaborative control mechanism of liquid level and temperature change rate, the system can maintain the liquid level within the set range even when the system is running for a long time or when the temperature changes drastically, reducing the risk of equipment failure and maintenance costs caused by excessively high or low liquid levels. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the method principle of the present invention;

[0032] Figure 2 This is a system structure diagram of the present invention;

[0033] Figure 3 This is an overall flowchart of the coordinated adjustment method of the present invention;

[0034] 1. Liquid level sensor, 2. Horizontal slide, 3. Upper limit liquid level, 4. Lower limit liquid level, 5. Temperature sensor, 6. Oil inlet pipe, 7. Oil inlet solenoid proportional valve, 8. Oil outlet solenoid proportional valve, 9. Oil return pipe. Detailed Implementation

[0035] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements. It is also understood that when an element is referred to as being "between" two elements, it may be the only one between the two elements, or there may be one or more intermediate elements.

[0038] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0039] It should also be understood that, in interpreting an element, although not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of a particular value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0040] As attached Figure 1 - Appendix Figure 3 As shown, in order to achieve precise control of the oil level in the horizontal slide and adapt to the influence of oil temperature changes, this application provides a method for coordinated adjustment of the oil supply and return system of the vibration table horizontal slide, including the following steps:

[0041] Step S1: Install a temperature sensor at the oil outlet of the oil source in the oil supply and return system of the vibration table, and install an oil level sensor in the hydraulic oil of the horizontal slide table; the purpose of this is to obtain real-time temperature and level data of the oil respectively, so as to provide accurate input parameters for subsequent coordinated control.

[0042] Step S2: Start the system. From the start of the vibration table operation, every sampling period... Oil level value is obtained by collecting data from the liquid level sensor. , The value range is 1~1.5min. This sampling period was chosen to ensure real-time control while avoiding system oscillation caused by excessively frequent sampling; and the oil temperature value is obtained by collecting data from the oil outlet temperature sensor. The rate of change of liquid level is calculated starting from the second sampling period. and rate of temperature change ,in For sampling sequence number, The purpose of calculating the rate of change is to quantify the dynamic trends of liquid level and temperature changes, providing a basis for subsequent judgment of the dominant influencing factors.

[0043] Step S3: Monitor liquid level With the preset upper limit liquid level and lower limit liquid level The size relationship, if ≥ or If the liquid level exceeds the safe range, protective adjustments will be made by inputting different opening commands to the inlet and outlet solenoid proportional valves until the liquid level returns to the normal range. This protective adjustment mechanism aims to prevent the liquid level from exceeding the safe range and ensure the safe operation of the horizontal slide.

[0044] The specific method of the protective regulation is as follows:

[0045] When detected ≥ When this occurs, it indicates that the liquid level is too high and there is a risk of oil splashing. The opening degree is then input to the inlet solenoid proportional valve. The command is given to reduce the oil supply flow rate and input the opening degree to the oil outlet solenoid proportional valve. The instruction is to increase the return oil flow rate, thereby rapidly lowering the liquid level. The value range is 10% to 15%. The value range is 80%~85%, and ; thereafter, the liquid level change was continuously monitored until the [number]th [day / month]. Oil level value for each sampling period satisfy At that time, among them Then proceed to step S4;

[0046] when ≤ When the liquid level is too low, it indicates a risk of oil emulsification and reduced load-bearing capacity. To increase the oil supply flow, the opening degree is increased by inputting the oil inlet solenoid proportional valve. Command to input opening degree to the oil outlet solenoid proportional valve The instruction was given to reduce the return oil flow rate, thereby rapidly increasing the liquid level. Liquid level changes were then continuously monitored until the [number missing] [time missing]. Oil level value for each sampling period satisfy At that time, among them Then proceed to step S4.

[0047] Step S4: Set the system's preset balance reference opening degree of the oil inlet electromagnetic proportional valve to... , The value range is 55%~60%, and the system preset oil outlet electromagnetic proportional valve balance reference opening is... , The value range is 55%~60%; this balance reference opening is the valve opening reference value of the system under ideal stable operating conditions.

[0048] Record the reference level value of the oil. , The value range is 30mm~35mm, and the reference temperature of the oil is [value missing]. , The value range is 50℃~55℃; the reference liquid level and reference temperature are used for normalization to eliminate the influence of dimensions and facilitate comprehensive evaluation. Definition Calculate the overall rate of change of liquid level and temperature. , The calculation formula is: The overall rate of change Used to quantify and compare the relative impacts of liquid level changes and temperature changes on liquid level stability. Definition The upper threshold is , The value range is 1.0 to 1.5. The lower threshold is , The value range is 0.7~0.8, where: , This represents the extreme value of the rate of change of liquid level. The value range is 5~8 mm / min. This represents the extreme value of the rate of temperature change. The value range is 12~15℃ / min; the extreme value is used to normalize the rate of change, so that the valve opening adjustment is kept within a reasonable range.

[0049] according to Calculate and adjust the opening of the inlet electromagnetic proportional valve within different ranges. and the opening degree of the solenoid proportional valve at the oil outlet The core of this coordinated regulation strategy lies in dynamically allocating the opening adjustment of the two valves based on the relative dominance of the liquid level change rate and the temperature change rate, in order to achieve rapid stabilization of the liquid level. The specific classification is as follows:

[0050] like This indicates that the rate of change of liquid level plays a dominant role in influencing the liquid level at this time, and it is necessary to consider... Adjust the opening of the inlet and outlet electromagnetic proportional valves to further determine the cause. The positive and negative, if This indicates that the liquid level is trending upward. , ;like This indicates that the liquid level is trending downwards. , ;

[0051] like This indicates that the rate of temperature change plays a dominant role in the influence of liquid level at this point, and further analysis is needed. Adjust the opening of the inlet and outlet electromagnetic proportional valves to further determine the cause. The positive and negative, if This indicates that the liquid level is trending downwards. , ;like This indicates that the liquid level is trending upward. , ;

[0052] like This indicates that the rate of change of liquid level and the rate of change of temperature have roughly the same effect on the liquid level, so both the rate of change of liquid level and the rate of change of temperature need to be considered. , This formula achieves the superposition of the effects of two factors, and by adjusting the two valves in opposite directions, it realizes the coordinated control of the supply and return oil flow rates.

[0053] This application also provides a hydraulic supply and return system for a horizontal slide of a vibration table, used to implement the aforementioned coordinated adjustment method for a hydraulic supply and return system for a horizontal slide of a vibration table, comprising:

[0054] The level sensor 1 is installed in the hydraulic oil of the horizontal slide 2 to detect the oil level and transmit the signal to the control unit.

[0055] The upper limit liquid level 3 and the lower limit liquid level 4 are marked in the hydraulic oil of the horizontal slide 2 as visual reference marks for the safe range of liquid level.

[0056] Temperature sensor 5 is installed at the oil outlet of the oil source. This installation position is conducive to accurately measuring the temperature of the oil that is about to enter the hydraulic guide rail of the horizontal slide table and feeding the temperature signal back to the control unit.

[0057] The inlet solenoid proportional valve 7 and the outlet solenoid proportional valve 8 are connected to the inlet pipeline 6 and the return pipeline 9, respectively. As the actuators of the system, they receive electrical signal commands from the control unit and precisely adjust the flow rates of the oil supply and return.

[0058] The control unit (not shown separately in the diagram, but the core of the system): It is typically implemented by a programmable logic controller (PLC) or an industrial computer, and is specifically configured to perform all the calculations and logical judgments in steps S2 to S4 above. Specifically, it calculates the rate of change of liquid level based on the liquid level value detected by level sensor 1 and the temperature value detected by temperature sensor 5. and rate of temperature change And coordinately adjust the opening degree of the oil inlet electromagnetic proportional valve 7. and the opening degree of the oil outlet electromagnetic proportional valve 8 .

[0059] The above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope defined by the claims of this application.

Claims

1. A method for coordinated adjustment of an oil supply system for a horizontal sliding table of a vibration table, characterized in that Includes the following steps: Step S1: Install a temperature sensor at the oil outlet of the oil source in the oil supply and return system of the vibration table, and install an oil level sensor in the hydraulic oil of the horizontal slide table. Step S2: Start the system, from the start of the vibration table work, every sampling period Collecting liquid level sensor data to obtain oil liquid level value And collecting oil outlet temperature sensor data to obtain oil temperature value From the second sampling period, calculate the liquid level change rate And temperature change rate Wherein Sampling number; Step S3: Monitor liquid level With the preset upper limit liquid level and lower limit liquid level The size relationship, if ≥ or If the liquid level returns to normal, protective adjustments will be made by inputting different opening commands to the inlet and outlet solenoid proportional valves until the liquid level returns to normal. Step S4: If the liquid level is not exceeded, then based on the rate of change of liquid level... The reference level of the oil. Reference temperature value of oil and rate of temperature change Calculate the overall rate of change of liquid level and temperature and according to With upper threshold and lower threshold The comparison results show that the opening of the inlet solenoid proportional valve is adjusted in a coordinated manner. and the opening degree of the oil outlet solenoid proportional valve This is to achieve dynamic stability of the liquid level.

2. The method for coordinated adjustment of the oil supply and return system of a vibration table horizontal slide according to claim 1, characterized in that, The sampling period mentioned in step S2 The value range is 1~1.5min.

3. The method according to claim 1, characterized in that, The specific method of protective adjustment in step S3 is as follows: When detected ≥ At that time, input the opening degree to the oil inlet solenoid proportional valve. Command to input opening degree to the oil outlet solenoid proportional valve Instructions, among which The value range is 10% to 15%. The value range is 80%~85%, and ; thereafter, the liquid level change was continuously monitored until the [number]th [day / month]. Oil level value for each sampling period satisfy At that time, among them Then proceed to step S4; when ≤ At that time, input the opening degree to the oil inlet solenoid proportional valve. Command to input opening degree to the oil outlet solenoid proportional valve The instruction was given, and the liquid level was continuously monitored until the [number]th [day / time]. Oil level value for each sampling period satisfy At that time, among them Then proceed to step S4.

4. The method according to claim 1, characterized in that, In step S4, the system presets the balance reference opening of the oil inlet electromagnetic proportional valve. The value range is 55%~60%, and the balance reference opening of the oil outlet electromagnetic proportional valve is... The value range is 55% to 60%.

5. The method according to claim 1, characterized in that, The reference liquid level value of the oil in step S4 The value range is 30mm~35mm, and the reference temperature value of the oil is... The value range is 50℃~55℃.

6. The method according to claim 1, characterized in that, The overall change rate of liquid level and temperature in step S4 upper threshold The value range is 1.0~1.5, and the lower threshold is... The value range is 0.7 to 0.8, and > .

7. The method according to claim 1, characterized in that, Extreme values ​​of liquid level change rate in step S4 The value range is 5~8 mm / min, and the extreme value of the temperature change rate is... The value range is 12~15℃ / min.

8. The method according to claim 1, characterized in that, In step S4, according to The specific methods for adjusting the valve opening include: like This indicates that the rate of change of liquid level plays a dominant role in influencing the liquid level at this time. Therefore, based on the rate of change of liquid level... Adjust the opening of the inlet and outlet electromagnetic proportional valves to further determine... Positive and negative: If ≥0 indicates that the liquid level has an upward trend. , ;like This indicates that the liquid level is trending downwards. , ; like This indicates that the rate of temperature change plays a dominant role in the influence of liquid level at this point, and further analysis is needed. Adjust the opening of the inlet and outlet electromagnetic proportional valves to further determine the cause. The sign depends on the rate of temperature change. Adjust the opening of the inlet and outlet electromagnetic proportional valves: If This indicates that the liquid level is trending downwards. , ; like This indicates that the liquid level is trending upward. , ; like This indicates that the rate of change of liquid level and the rate of change of temperature have roughly the same effect on the liquid level. , .

9. A hydraulic supply and return system for a horizontal slide of a vibration table, used to implement the coordinated adjustment method for the hydraulic supply and return system of a horizontal slide of a vibration table as described in any one of claims 1-8, characterized in that, include: A level sensor (1) is installed in the hydraulic oil of the horizontal slide (2) to detect the level value of the oil. The upper limit liquid level (3) and the lower limit liquid level (4) are marked in the hydraulic oil of the horizontal slide (2) as visual reference marks for the safe range of liquid level; Temperature sensor (5) is installed at the oil outlet of the oil source to detect the oil temperature value; The inlet solenoid proportional valve (7) and the outlet solenoid proportional valve (8) are connected to the inlet pipeline (6) and the return pipeline (9) respectively, and are used to regulate the supply and return flow rates. The control unit is configured to perform steps S2 to S4 as described in claim 1, and to calculate the rate of change of liquid level based on the liquid level value detected by the liquid level sensor (1) and the temperature value detected by the temperature sensor (5). and rate of temperature change And coordinately adjust the opening degree of the oil inlet electromagnetic proportional valve (7). and the opening degree of the oil outlet electromagnetic proportional valve (8) .

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