Lossless online failure judgment method for oil-filled energy accumulator

Abstract

The invention relates to the field of hydraulic systems, and discloses an oil-filled energy accumulator lossless online failure judgment method which comprises a temperature detection judgment method and a flow detection judgment method, and the specific temperature detection judgment method comprises the steps that S1, temperature sensors are installed, specifically, the temperature sensors are divided into a group A and a group B; s2, temperature information acquisition and comparison: a temperature sensor A and a temperature sensor B transmit acquired temperature parameters to an integrated computer so as to judge whether the energy accumulator breaks down or not; and S3, a temperature judgment result is obtained, wherein a corresponding processing mode is implemented according to a comparison result. Through the temperature detection and judgment method and the flow detection and judgment method, the working state of the oil-filled energy accumulator can be monitored online in real time, and the potential air leakage risk can be found in time. Compared with the traditional modes of air inflation maintenance every half a year, discovery after faults or regular manual detection and the like, the timeliness of risk discovery is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic systems, and in particular to a non-destructive online failure judgment method for an oil-filled accumulator. Background Art

[0002] The accumulator is a vital accessory in the hydraulic system. It has many key functions such as absorbing pulsation, emergency energy storage, pressure compensation, and emergency power source. It is widely used in many fields such as aviation, metallurgy, machinery, and electricity.

[0003] However, most of the accumulators commonly used on the market currently use gas as the energy storage medium, which inevitably leads to the risk of leakage after long-term use of the accumulator. The current common practice is to perform inflation maintenance every six months, or only discover the problem when the accumulator fails due to leakage and the machine as a whole cannot work normally, or to perform regular preventive inspections. However, these methods have certain limitations and cannot effectively detect potential risks in a timely manner. For example, the inflation method every six months may lead to inaccurate inflation timing due to different actual usage conditions, and the accumulator may have leakage problems before half a year, affecting system performance; and only when the accumulator fails to work due to leakage will the problem be discovered, which often causes production interruption and brings great economic losses; regular preventive inspections not only consume manpower and material resources, but also cannot guarantee that there will be no leakage problems during the inspection interval. Therefore, there is an urgent need for a more effective method to timely detect the leakage risk of the accumulator to ensure the stable operation of the system. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a non-destructive online failure judgment method for an oil-filled accumulator, which solves the problem that the existing accumulator detection has great limitations and cannot detect risks in a timely manner.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a non-destructive online failure judgment method for an oil-filled accumulator, including a temperature detection judgment method and a flow detection judgment method, wherein the specific temperature detection judgment method is: S1. Install temperature sensors: Divide the temperature sensors into two groups, A and B. One group of temperature sensors A is installed on the outer wall of the pipe where the accumulator is located, and the other group of temperature sensors B is installed on the accumulator frame; S2. Temperature information collection and comparison: Temperature sensor A and temperature sensor B transmit the collected temperature parameters to the integrated computer, so that the integrated computer uses the temperature parameters collected by temperature sensor B as the base to compare the two sets of parameters, thereby determining whether the accumulator has a fault; S3. Temperature judgment result: implement corresponding processing method according to the comparison result.

[0006] Preferably, the specific temperature sensor includes: an inspection meter.

[0007] Preferably, in step S1 of the temperature detection and judgment method, the temperature sensor A collects dynamic temperature parameters during the operation of the accumulator, and the temperature sensor B collects a fixed temperature on the accumulator frame as a reference base.

[0008] Preferably, in step S2 of the temperature detection and judgment method, the specific comparison method is: ,in: Represents the accumulator temperature collected by temperature sensor A; Represents the frame base temperature collected by temperature sensor B; Represents the temperature difference threshold; when XY>T, it is judged that no fault has occurred; when XY≤T, it is judged that there may be a fault and further inspection is required.

[0009] Preferably, in step S3 of the temperature detection and judgment method, the specific processing method is: when the comparison result XY>T, it is judged that no fault occurs and the accumulator is kept in continuous operation; when the comparison result XY≤T, it is judged that a fault occurs in the accumulator, the operation of the accumulator is stopped immediately, and the staff is promptly reminded to perform maintenance.

[0010] Preferably, the specific flow detection and judgment method is: S1. Install the flow rate sensor: Install a non-contact flow rate sensor on the outer wall of the pipe where the accumulator is located; S2. Flow rate information collection and comparison: The non-contact flow rate sensor measures the flow rate and transmits the flow rate data to the integrated computer through 485 communication. The integrated computer displays the flow rate of the corresponding pipeline of each accumulator in real time, and uses the flow rate as the basis for judgment; S3. Flow rate judgment result: implement corresponding processing method according to the comparison result.

[0011] Preferably, in the flow detection and judgment method, the specific judgment standard of step S2 is: when there is flow rate, it means that the energy storage is normal; when it is monitored that the oil is not flowing and the accumulator is in a continuous working state, it is judged that the inflatable airbag in the accumulator is damaged.

[0012] Preferably, in the flow detection and judgment method, the specific processing method of step S3 is: when the integrated computer displays a flow rate, it is judged that the accumulator has no fault and the accumulator is kept in continuous operation; when the integrated computer displays that the oil is not flowing, it is judged that the accumulator has a fault, the accumulator operation is stopped immediately, and the staff is promptly reminded to perform maintenance, and the gas in the accumulator needs to be checked.

[0013] Preferably, the specific flow velocity sensor includes: an ultrasonic flow velocity sensor.

[0014] An application of a non-destructive online failure judgment method for an oil-filled accumulator, as described in claims 1-9, is applied to the field of hydraulic systems, especially the field of engineering machinery hydraulic systems and metallurgical equipment hydraulic systems and their testing machines and non-standard testing equipment.

[0015] The present invention provides a non-destructive online failure judgment method for an oil-filled accumulator. It has the following beneficial effects: 1. The present invention can monitor the working status of the oil-filled accumulator in real time online through the temperature detection and judgment method and the flow detection and judgment method, and timely discover potential leakage risks. Compared with the traditional methods of half-yearly inflation maintenance, post-failure discovery or regular manual detection, the timeliness of risk discovery is greatly improved, and the adverse consequences such as system performance degradation and production interruption caused by accumulator leakage are avoided.

[0016] 2. The nondestructive online failure judgment method of the present invention is easy to operate. Compared with pressure monitoring which requires opening of an inflation hole and is prone to the risk of gas leakage at the monitoring point, the safety of this method is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flow chart of the method of the present invention; Figure 2 It is a schematic diagram of temperature monitoring of the present invention; Figure 3 It is a flow monitoring schematic diagram of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: Please refer to the attached Figure 1 - Attachment Figure 3 The embodiment of the present invention provides a non-destructive online failure judgment method for an oil-filled accumulator, comprising the following steps: S1. Install temperature sensors: The temperature sensors are divided into two groups, A and B. The specific temperature sensors include: inspection tables, one group of temperature sensors A is installed on the outer wall of the pipe where the accumulator is located, and the other group of temperature sensors B is installed on the accumulator frame; temperature sensor A collects dynamic temperature parameters during the operation of the accumulator, and temperature sensor B collects fixed temperature on the accumulator frame as a reference base; S2. Temperature information collection and comparison: Temperature sensor A and temperature sensor B transmit the collected temperature parameters to the integrated computer, so that the integrated computer uses the temperature parameters collected by temperature sensor B as the base to compare the two sets of parameters, thereby determining whether the accumulator has a fault; The specific comparison method is:

[0020] in: Represents the accumulator temperature collected by temperature sensor A; Represents the frame base temperature collected by temperature sensor B; Represents the temperature difference threshold; When XY>T, it is judged that no fault occurs; when XY≤T, it is judged that there may be a fault and further inspection is required; An example implementation of the above formula demonstrates: When the temperature Y collected by temperature sensor B (frame base temperature sensor) is 25°C, the temperature X collected by temperature sensor A (accumulator temperature sensor) is 32°C.

[0021] Then, XY = 32-25 = 7°C. Since 7°C>5°C, according to the set judgment standard, it means that the accumulator works normally and there is no gas leakage in the airbag.

[0022] When the temperature collected by temperature sensor A becomes 30°C, then XY=30-25=5°C. This is a critical state and the working state of the accumulator needs to be further observed and confirmed.

[0023] When the temperature collected by temperature sensor A becomes 28°C, then XY=28-25=3°C. Since 3°C<5°C, it means that the gas in the energy storage gas may not flow, and the inflatable airbag may be damaged. It is necessary to check the gas in the energy storage gas.

[0024] S3. Temperature judgment result: Implement corresponding processing methods according to the comparison results. When the comparison result XY>T, it is judged that no fault occurs and the accumulator continues to operate. When the comparison result XY≤T, it is judged that the accumulator has a fault, and the accumulator operation is stopped immediately, and the staff is reminded to perform maintenance in time.

[0025] Embodiment 2: A non-destructive online failure judgment method for an oil-filled accumulator comprises the following steps: S1. Installing a flow sensor: Install a non-contact flow sensor on the outer wall of the pipe where the accumulator is located. The specific flow sensor includes: an ultrasonic flow sensor; S2. Flow rate information collection and comparison: The non-contact flow rate sensor measures the flow rate and transmits the flow rate data to the integrated computer through 485 communication. The integrated computer displays the flow rate of the corresponding pipeline of each accumulator in real time, and uses the presence of flow rate as the basis for judgment. If there is flow rate, it means that the energy storage is normal. If it is monitored that the oil does not flow and the accumulator is in a continuous working state, it is judged that the airbag in the accumulator is damaged; S3. Flow rate judgment result: When the integrated computer shows that there is flow rate, it is judged that there is no fault in the accumulator and the accumulator continues to operate; when the integrated computer shows that the oil is not flowing, it is judged that there is a fault in the accumulator, the accumulator operation is stopped immediately, and the staff is reminded to carry out maintenance in time, and the gas in the accumulator needs to be checked.

[0026] Comparative experiment: Determine the safety of temperature detection judgment method and flow detection judgment method with traditional pressure monitoring.

[0027] 1. Experimental Preparation Prepare 60 groups of oil-filled accumulators of the same specifications and ensure that they are in good initial condition.

[0028] Prepare 20 sets of temperature sensors A and B, 20 sets of non-contact flow sensors (ultrasonic flow sensors), and 20 sets of tools and equipment for internal pressure monitoring.

[0029] Data logging equipment (e.g., computer) and associated software to record and analyze experimental data.

[0030] Equipment that simulates the working environment, such as hydraulic system simulation devices, etc.

[0031] 2. Experimental Grouping and Installation The 60 accumulators were randomly divided into three groups, 20 in each group: The first group uses the temperature sensor monitoring method, where temperature sensor A is installed on the outer wall of the pipe where the accumulator is located, and temperature sensor B is installed on the accumulator frame.

[0032] The second group uses the flow sensor monitoring method, and a non-contact flow sensor is installed on the outer wall of the pipe where the accumulator is located.

[0033] The third group adopted the internal pressure monitoring method and installed a tool for internal pressure monitoring at the charging hole of the accumulator.

[0034] Ensure that all sensors and monitoring equipment are correctly installed and debugged to normal working condition.

[0035] 3. Experimental operation The three groups of accumulators were simultaneously connected to a device that simulated the working environment and operated under the same working conditions for six months.

[0036] Three sets of accumulator monitoring data are recorded regularly (e.g., weekly), including temperature data from the temperature sensor, flow rate data from the flow rate sensor, and pressure data from the internal pressure monitoring device.

[0037] 4. Data Collection and Analysis During the six months of the experimental operation, the working conditions of the three groups of accumulators were closely observed and any leakage or damage was recorded.

[0038] Analyze the collected data: Temperature sensor monitoring method (20 groups): During the six-month experiment, three groups of accumulators showed a slight performance degradation, but after inspection, it was found that it was not caused by leakage and could continue to be used normally. No accumulator showed obvious leakage or damage.

[0039] Number of damaged or leaking groups: 0 groups.

[0040] Damage percentage: 0%.

[0041] Flow rate sensor monitoring method (20 groups): Four months into the experiment, the flow rate data of one set of accumulators showed abnormal fluctuations. After inspection, it was found that there were debris in the pipeline. After cleaning, it returned to normal, not the accumulator itself. During the entire experiment, no accumulator leaked or was damaged.

[0042] Number of damaged or leaking groups: 0 groups.

[0043] Damage percentage: 0%.

[0044] Internal pressure monitoring method (20 groups): Two months into the experiment, one group of accumulators had a slight leak at the detection hole, which was sealed in time and had no significant impact on the accumulator performance. Five months into the experiment, another two groups of accumulators had seal failures around the detection holes, resulting in significant leaks, which affected the accumulator performance to a certain extent.

[0045] Number of damaged or leaking groups: 3 groups.

[0046] Damage percentage: 15%.

[0047] Monitoring methods Number of damaged or leaking groups Damage ratio Situation Temperature sensor monitoring method 0 0% There were 3 groups with slight performance degradation, which was not caused by air leakage after inspection. They can be used normally without obvious air leakage or damage. Flow rate sensor monitoring method 0 0% There was one set of abnormal flow rate data fluctuations at four months. It was due to debris in the pipeline, not the accumulator itself. There was no leakage or damage. Internal Pressure Monitoring Method 3 15% At two months, the test holes in group 1 leaked slightly, but the performance was not affected after sealing. At five months, the seals in group 2 failed, and there was obvious leakage, which affected the performance. 4. Experimental conclusion: It can be seen from the experimental results that the temperature sensor monitoring method and the flow rate sensor monitoring method did not show obvious accumulator damage or leakage during the six-month experiment. However, due to the opening of a separate detection hole, the internal pressure monitoring method had a certain risk of leakage during the experiment, and the damage accounted for 15%. This shows that in practical applications, although the internal pressure monitoring method has the advantage of directly measuring the internal pressure, it is necessary to pay more attention to the sealing of the detection hole to reduce the impact of the leakage risk on the performance and service life of the accumulator. At the same time, the temperature sensor monitoring method and the flow rate sensor monitoring method have shown good reliability and stability to a certain extent, and can be used as one of the effective methods for accumulator monitoring.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-destructive online failure judgment method for an oil-filled accumulator, characterized in that: It includes temperature detection and judgment method and flow detection and judgment method, wherein the specific temperature detection and judgment method is: S1. Install temperature sensors: Divide the temperature sensors into two groups, A and B. One group of temperature sensors A is installed on the outer wall of the pipe where the accumulator is located, and the other group of temperature sensors B is installed on the accumulator frame; S2. Temperature information collection and comparison: Temperature sensor A and temperature sensor B transmit the collected temperature parameters to the integrated computer, so that the integrated computer uses the temperature parameters collected by temperature sensor B as the base to compare the two sets of parameters, thereby determining whether the accumulator has a fault; S3. Temperature judgment result: implement corresponding processing method according to the comparison result.

2. A non-destructive online failure judgment method for an oil-filled accumulator according to claim 1, characterized in that: The specific temperature sensor includes: a patrol meter.

3. A non-destructive online failure judgment method for an oil-filled accumulator according to claim 1, characterized in that: In step S1 of the temperature detection and judgment method, the temperature sensor A collects dynamic temperature parameters during the operation of the accumulator, and the temperature sensor B collects the fixed temperature on the accumulator frame as a reference base.

4. A non-destructive online failure judgment method for an oil-filled accumulator according to claim 1, characterized in that: In step S2 of the temperature detection and judgment method, the specific comparison method is: ,in: Represents the accumulator temperature collected by temperature sensor A; Represents the frame base temperature collected by temperature sensor B; Represents the temperature difference threshold; when XY>T, it is judged that no fault has occurred; when XY≤T, it is judged that there may be a fault and further inspection is required.

5. The non-destructive online failure judgment method for an oil-filled accumulator according to claim 1 is characterized in that: In step S3 of the temperature detection and judgment method, the specific processing method is: when the comparison result XY>T, it is judged that no fault occurs and the accumulator is kept in continuous operation; when the comparison result XY≤T, it is judged that a fault occurs in the accumulator, the operation of the accumulator is stopped immediately, and the staff is promptly reminded to perform maintenance.

6. A non-destructive online failure judgment method for an oil-filled accumulator according to claim 1, characterized in that: The specific flow detection and judgment method is: S1. Install the flow rate sensor: Install a non-contact flow rate sensor on the outer wall of the pipe where the accumulator is located; S2. Flow rate information collection and comparison: The non-contact flow rate sensor measures the flow rate and transmits the flow rate data to the integrated computer through 485 communication. The integrated computer displays the flow rate of the corresponding pipeline of each accumulator in real time, and uses the flow rate as the basis for judgment; S3. Flow rate judgment result: implement corresponding processing method according to the comparison result.

7. A non-destructive online failure judgment method for an oil-filled accumulator according to claim 1, characterized in that: In the flow detection and judgment method, the specific judgment standard of step S2 is: when there is flow rate, it means that the energy storage is normal; when it is monitored that the oil is not flowing and the accumulator is in a continuous working state, it is judged that the inflatable airbag in the accumulator is damaged.

8. A non-destructive online failure judgment method for an oil-filled accumulator according to claim 1, characterized in that: In the flow detection and judgment method, the specific processing method of step S3 is: when the integrated computer displays a flow rate, it is judged that the accumulator has no fault and the accumulator is kept in continuous operation; when the integrated computer displays that the oil is not flowing, it is judged that the accumulator has a fault, the accumulator is stopped immediately, and the staff is reminded to perform maintenance in time, and the gas in the accumulator needs to be checked.

9. A non-destructive online failure judgment method for an oil-filled accumulator according to claim 1, characterized in that: The specific flow velocity sensor includes: an ultrasonic flow velocity sensor.

10. An application of a non-destructive online failure judgment method for an oil-filled accumulator, characterized in that: The non-destructive online failure judgment method of an oil-filled accumulator as described in claims 1-9 is applied to the field of hydraulic systems, especially the field of engineering machinery hydraulic systems and metallurgical equipment hydraulic systems and their testing machines and non-standard testing equipment.

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