Methods, devices and electronic equipment for detecting oil leaks in hydraulic systems

Abstract

This invention relates to the field of hydraulic equipment technology and provides a method, device, and electronic equipment for detecting oil leaks in a hydraulic system. The method includes: a hydraulic system oil leak detection method, wherein the hydraulic system includes an oil tank, multiple first hydraulic cylinders equipped with displacement sensors, and multiple second hydraulic cylinders without displacement sensors; the method includes: obtaining a first oil volume in the oil tank and the multiple first hydraulic cylinders at a first set time; obtaining a second oil volume in the oil tank and the multiple first hydraulic cylinders at a second set time after the first set time; obtaining a third oil volume, wherein the third oil volume is the sum of the maximum changes in hydraulic oil volume in the multiple second hydraulic cylinders; and comparing the difference between the first oil volume and the second oil volume with the third oil volume to determine whether the hydraulic system is leaking. This ensures accurate and timely detection of oil leaks in the hydraulic system and avoids affecting the normal operation of the hydraulic equipment.

Description

Technical Field

[0001] This invention relates to the field of hydraulic equipment technology, and more specifically, to a method, detection device, and electronic equipment for detecting oil leakage in hydraulic systems. Background Technology

[0002] Hydraulic equipment is widely used in various industries. It has the characteristics of strong load-bearing capacity and stable operation. However, the hydraulic systems of various equipment are prone to oil leakage to some extent. Therefore, oil leakage detection and alarm systems are often installed on hydraulic equipment to detect oil leakage as early as possible and take corresponding maintenance measures.

[0003] However, the commonly used method for existing oil leak alarms is to trigger an alarm when the main oil tank level drops to the low level indicated by the level sensor. While this method can detect and trigger an alarm, its drawback is that it is not timely in detecting and detecting leaks, leading to delayed alarms. By the time a leak is detected, the hydraulic oil in the tank may have already completely leaked, often reaching 60%-70% of the tank's volume. At this point, the alarm is severely delayed, causing the hydraulic equipment to malfunction. Furthermore, the leaked hydraulic oil also pollutes the environment. Summary of the Invention

[0004] The present invention aims to solve the problem that existing oil leakage detection methods fail to detect oil leaks in hydraulic equipment in a timely manner, resulting in alarm delays and affecting the normal operation of hydraulic equipment.

[0005] To address the above problems, this invention provides a method for detecting oil leakage in a hydraulic system. The hydraulic system includes an oil tank, multiple first hydraulic cylinders equipped with displacement sensors, and multiple second hydraulic cylinders without displacement sensors.

[0006] Obtain the first oil volume in the oil tank and the plurality of first hydraulic cylinders at a first set time;

[0007] The second oil volume in the oil tank and the plurality of first hydraulic cylinders is obtained at a second set time after the first set time.

[0008] A third oil quantity is obtained, wherein the third oil quantity is the sum of the maximum changes in hydraulic oil in multiple second hydraulic cylinders;

[0009] The difference between the first oil volume and the second oil volume is compared with the third oil volume to determine whether the hydraulic system is leaking oil.

[0010] Optionally, obtaining the third oil quantity, wherein the third oil quantity is the sum of the maximum changes in hydraulic oil volume within the plurality of second hydraulic cylinders, includes:

[0011] Obtain the maximum volume change of the second hydraulic cylinder;

[0012] The third oil quantity is calculated based on the maximum volume change of the second hydraulic cylinder.

[0013] Optionally, calculating the third oil quantity based on the maximum volume change of the second hydraulic cylinder includes:

[0014] According to the formula:

[0015] The third oil quantity is obtained, wherein:

[0016] △V N The total amount of third oil in j second hydraulic cylinders;

[0017] A pm Let be the cross-sectional area of ​​the side without piston rod inside the m-th second hydraulic cylinder;

[0018] A bm Let be the cross-sectional area of ​​the side with the piston rod inside the m-th second hydraulic cylinder;

[0019] L m This represents the stroke of the m-th second hydraulic cylinder.

[0020] Optionally, the step of comparing the difference between the first oil quantity and the second oil quantity with the third oil quantity to determine whether the hydraulic system is leaking includes:

[0021] If the difference between the first oil quantity and the second oil quantity is greater than the third oil quantity, it is determined that the hydraulic system is leaking oil.

[0022] If the difference between the first oil quantity and the second oil quantity is less than the third oil quantity, then the hydraulic system is determined to be leak-free.

[0023] Optionally, the step of comparing the difference between the first oil quantity and the second oil quantity with the third oil quantity to determine whether the hydraulic system is leaking includes:

[0024] The second oil quantity is set to the sum of the real-time hydraulic oil quantities of the oil tank and the plurality of first hydraulic cylinders during a set time period after the first set time.

[0025] If, within the set time period, the difference between the first oil quantity and the second oil quantity is always greater than the third oil quantity, then it is determined that the hydraulic system is leaking oil.

[0026] Optionally, obtaining the first oil quantity in the oil tank and the plurality of first hydraulic cylinders at the first set time includes:

[0027] A liquid level sensor is installed in the oil tank. At the first set time, the amount of hydraulic oil in the oil tank is obtained based on the hydraulic oil level detected by the liquid level sensor.

[0028] At the first set time, the hydraulic oil volume in the first hydraulic cylinder is obtained according to the piston rod position of the first hydraulic cylinder detected by each displacement sensor.

[0029] The first oil quantity is obtained based on the hydraulic oil quantity in the oil tank and the hydraulic oil quantity in the plurality of first hydraulic cylinders.

[0030] Optionally, obtaining the hydraulic oil quantity in the multiple first hydraulic cylinders at the first set time, based on the piston rod position of the first hydraulic cylinder detected by each displacement sensor, includes:

[0031] According to the formula:

[0032] The hydraulic oil volume in multiple first hydraulic cylinders is obtained, wherein:

[0033] V c1 The total amount of hydraulic oil in the first hydraulic cylinder at the first set time;

[0034] A pn Let be the cross-sectional area of ​​the side without piston rod inside the nth first hydraulic cylinder;

[0035] A bn Let be the cross-sectional area of ​​the side with the piston rod inside the nth first hydraulic cylinder;

[0036] S cn The position of the piston rod of the first hydraulic cylinder detected by the displacement sensor of the nth first hydraulic cylinder at a first set time;

[0037] L cn Let be the stroke of the piston rod of the nth first hydraulic cylinder.

[0038] Optionally, both the first oil quantity and the second oil quantity contain the total oil quantity in all pipelines of the hydraulic system, which is obtained based on the volume of all pipelines in the hydraulic system.

[0039] In addition, the present invention also provides a hydraulic system oil leakage detection device, wherein the hydraulic system includes an oil tank, multiple first hydraulic cylinders equipped with displacement sensors, and multiple second hydraulic cylinders without displacement sensors, comprising:

[0040] The acquisition unit is configured to acquire the first oil volume in the oil tank and the plurality of first hydraulic cylinders at a first set time; the acquisition unit is also configured to acquire the second oil volume in the oil tank and the plurality of first hydraulic cylinders at a second set time after the first set time.

[0041] The judgment unit is used to determine whether the hydraulic system is leaking oil based on the sum of the first oil quantity, the second oil quantity, and the maximum change in hydraulic oil in the plurality of second hydraulic cylinders; and

[0042] An alarm unit is activated when the judgment unit determines that the hydraulic system is leaking oil.

[0043] In addition, the present invention also provides an electronic device, including: a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the hydraulic system oil leakage detection method.

[0044] Compared with the prior art, the present invention has the following technical effects:

[0045] This invention reveals that the main factor preventing accurate determination of whether there is an oil leak in the hydraulic system during operation is whether the piston rod in the hydraulic cylinder is retracted or extended. This directly affects the effective volume of the hydraulic cylinder. When the piston rod is retracted, the volume decreases; when it is extended, the volume reaches its maximum. Therefore, during operation, the hydraulic oil volume in each cylinder is dynamically changing, causing significant fluctuations in the overall hydraulic oil volume. This makes it impossible to accurately calculate the change in hydraulic oil volume and, consequently, to accurately determine whether there is an oil leak.

[0046] To address this, the present invention categorizes the hydraulic cylinders of the entire hydraulic system into first hydraulic cylinders equipped with displacement sensors and second hydraulic cylinders without displacement sensors. For the first hydraulic cylinders with displacement sensors, the hydraulic oil volume can be calculated by detecting the piston rod's movement position using the displacement sensor. This volume is then included in the first and second oil volumes and can be obtained in real time, recorded at corresponding first and second set times. For the second hydraulic cylinders, where the real-time piston rod movement position cannot be detected, a "third oil volume" is obtained, which is the sum of the maximum changes in hydraulic oil volume within multiple second hydraulic cylinders. This obtains the maximum fluctuation range of hydraulic oil volume within multiple second hydraulic cylinders, i.e., the third oil volume. This quantifies the significant fluctuation in the hydraulic oil volume of the entire hydraulic system as the third oil volume, which represents the maximum hydraulic oil volume error during system operation—the sum of the maximum volume changes caused by the operation of the second hydraulic cylinders without displacement sensors. Finally, by comparing the difference between the first and second oil volumes with the third oil volume, it is determined whether the hydraulic system is leaking oil. This ensures the accuracy of hydraulic system leak detection. Furthermore, by using only the third oil quantity, which is the sum of the maximum changes in hydraulic oil in multiple second hydraulic cylinders, as the judgment benchmark, we can avoid the situation where the third oil quantity is set too low, causing the entire hydraulic system to make incorrect judgments and lead to false alarms due to the aforementioned normal "significant fluctuations in hydraulic oil quantity" under normal operating conditions. Therefore, using only the third oil quantity, which is the sum of the maximum changes in hydraulic oil in multiple second hydraulic cylinders, as the judgment benchmark has a certain degree of system fault tolerance, thereby ensuring both accurate judgment and avoiding the occurrence of false alarms caused by incorrect judgment.

[0047] Simultaneously, the total oil volume in the tank and multiple first hydraulic cylinders is obtained at a first set time and recorded as the first oil volume. Then, at a second set time after the first set time, the total oil volume in the tank and multiple first hydraulic cylinders is obtained again and recorded as the second oil volume. The first oil volume is used as the benchmark for subsequent detection. This ensures that the second oil volume detected at any second set time after the first set time can be subtracted from the first oil volume, and the difference is compared with the third oil volume. This allows for real-time detection of oil leaks in the hydraulic system, ensuring timely detection and alarm activation. This guarantees accurate and timely detection of hydraulic system leaks, preventing disruption to the normal operation of hydraulic equipment. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the hydraulic system described in this invention;

[0049] Figure 2This is a schematic flowchart illustrating the main processes of the hydraulic system oil leakage detection method of the present invention;

[0050] Figure 3 This is a schematic flowchart illustrating the entire process of the hydraulic system oil leakage detection method of the present invention.

[0051] Explanation of reference numerals in the attached diagram: oil tank 100, first hydraulic cylinder 200, second hydraulic cylinder 300. Detailed Implementation

[0052] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0056] To solve the above technical problems, see [link to relevant documentation]. Figure 1 and Figure 2 This embodiment provides a method for detecting oil leakage in a hydraulic system. The hydraulic system includes an oil tank 100, multiple first hydraulic cylinders 200 equipped with displacement sensors, and multiple second hydraulic cylinders 300 without displacement sensors.

[0057] Obtain the first oil volume in the oil tank 100 and the plurality of first hydraulic cylinders 200 at a first set time;

[0058] The second oil volume in the oil tank 100 and the plurality of first hydraulic cylinders 200 is obtained at a second set time after the first set time.

[0059] A third oil quantity is obtained, wherein the third oil quantity is the sum of the maximum changes in hydraulic oil within the plurality of second hydraulic cylinders 300;

[0060] The difference between the first oil volume and the second oil volume is compared with the third oil volume to determine whether the hydraulic system is leaking oil.

[0061] It should be noted that the hydraulic oil here can be replaced by other fluid media, as long as they can replace the hydraulic oil and enable the entire system to operate normally.

[0062] This invention reveals that the main factor preventing accurate determination of whether there is an oil leak in the hydraulic system during operation is whether the piston rod in the hydraulic cylinder is retracted or extended. This directly affects the effective volume of the hydraulic cylinder. When the piston rod is retracted, the volume decreases; when it is extended, the volume reaches its maximum. Therefore, during operation, the hydraulic oil volume in each cylinder is dynamically changing, causing significant fluctuations in the overall hydraulic oil volume. This makes it impossible to accurately calculate the change in hydraulic oil volume and, consequently, to accurately determine whether there is an oil leak.

[0063] Therefore, this invention classifies the hydraulic cylinders of the entire hydraulic system into first hydraulic cylinders 200 equipped with displacement sensors and second hydraulic cylinders 300 without displacement sensors. The hydraulic oil volume in the first hydraulic cylinder 200 with displacement sensors can be calculated by detecting the piston rod's movement position using the displacement sensors. This volume is then included in the first and second oil volumes and can be obtained in real time, recorded at corresponding first and second set times. For the second hydraulic cylinders 300, where the real-time piston rod movement position cannot be detected, a "third oil volume" is obtained, which is the sum of the maximum changes in hydraulic oil volume within multiple second hydraulic cylinders 300. This obtains the maximum fluctuation range of hydraulic oil volume within multiple second hydraulic cylinders 300, i.e., the third oil volume. This quantifies the significant fluctuation in the hydraulic oil volume of the entire hydraulic system as the third oil volume, which is the maximum hydraulic oil volume error during system operation, i.e., the sum of the maximum volume changes caused by the operation of the second hydraulic cylinders 300 without displacement sensors. Finally, the difference between the first and second oil volumes is compared with the third oil volume to determine whether the hydraulic system is leaking oil. This ensures the accuracy of detecting oil leaks in the hydraulic system. Furthermore, by using only the third oil quantity—the sum of the maximum changes in hydraulic oil levels within multiple second hydraulic cylinders 300—as the judgment criterion, the system avoids making incorrect judgments and false alarms due to excessively low third oil quantity settings caused by significant fluctuations in hydraulic oil levels during normal operation. Therefore, using only the third oil quantity—the sum of the maximum changes in hydraulic oil levels within multiple second hydraulic cylinders 300—as the judgment criterion provides a certain degree of system fault tolerance, thus ensuring both accurate judgment and preventing false alarms caused by incorrect judgments.

[0064] Simultaneously, the total oil volume in the oil tank 100 and the multiple first hydraulic cylinders 200 is obtained at a first set time and recorded as the first oil volume. Then, at a second set time after the first set time, the total oil volume in the oil tank 100 and the multiple first hydraulic cylinders 200 is obtained again and recorded as the second oil volume. The first oil volume is used as the benchmark for subsequent detection. This ensures that the second oil volume detected at any second set time after the first set time can be subtracted from the first oil volume, and the difference is compared with the third oil volume. This allows for real-time detection of oil leaks in the hydraulic system, ensuring timely detection and alarm activation. This guarantees accurate and timely detection of hydraulic system leaks, preventing disruption to the normal operation of hydraulic equipment.

[0065] See Figures 1 to 3 Furthermore, obtaining the third oil quantity, wherein the third oil quantity is the sum of the maximum changes in hydraulic oil within the plurality of second hydraulic cylinders 300, includes:

[0066] To obtain the maximum volume change of the second hydraulic cylinder 300;

[0067] The third oil quantity is calculated based on the maximum volume change of the second hydraulic cylinder 300.

[0068] See Figures 1 to 3 Furthermore, calculating the third oil quantity based on the maximum volume change of the second hydraulic cylinder 300 includes:

[0069] According to the formula:

[0070] The third oil quantity is obtained, wherein:

[0071] △V n The third oil quantity is for a total of j second hydraulic cylinders 300;

[0072] A pm Let be the cross-sectional area of ​​the side without piston rod inside the m-th second hydraulic cylinder 300;

[0073] A bm Let be the cross-sectional area of ​​the side with the piston rod inside the m-th second hydraulic cylinder 300;

[0074] L m This represents the stroke of the m-th second hydraulic cylinder 300.

[0075] Thus, through the formula Calculate the total amount of third oil ΔV in j second hydraulic cylinders 300. n .

[0076] See Figures 1 to 3 Furthermore, the first oil quantity in the oil tank 100 and the plurality of first hydraulic cylinders 200 at the first set time includes:

[0077] A liquid level sensor is installed in the oil tank 100. At the first set time, the amount of hydraulic oil in the oil tank 100 is obtained based on the hydraulic oil level detected by the liquid level sensor.

[0078] At the first set time, the hydraulic oil volume in the first hydraulic cylinder 200 is obtained according to the piston rod position of the first hydraulic cylinder 200 detected by each displacement sensor.

[0079] The first oil quantity is obtained based on the hydraulic oil quantity in the oil tank 100 and the hydraulic oil quantity in the plurality of first hydraulic cylinders 200.

[0080] See Figures 1 to 3Furthermore, the step of obtaining the hydraulic oil quantity in the multiple first hydraulic cylinders 200 at the first set time based on the piston rod position of the first hydraulic cylinder 200 detected by each displacement sensor includes:

[0081] According to the formula:

[0082] The hydraulic oil levels in multiple first hydraulic cylinders 200 are obtained, wherein:

[0083] V c1 The total amount of hydraulic oil in the i first hydraulic cylinders 200 at the first set time;

[0084] A pn Let be the cross-sectional area of ​​the side without piston rod inside the nth first hydraulic cylinder 200;

[0085] A bn Let be the cross-sectional area of ​​the side with the piston rod inside the nth first hydraulic cylinder 200;

[0086] S cn The position of the piston rod of the first hydraulic cylinder 200 detected by the displacement sensor of the nth first hydraulic cylinder 200 at a first set time;

[0087] L cn This is the stroke of the piston rod of the nth first hydraulic cylinder 200.

[0088] See Figures 1 to 3 Furthermore, both the first oil quantity and the second oil quantity contain the total oil quantity in all pipelines of the hydraulic system, which is obtained based on the volume of all pipelines in the hydraulic system.

[0089] Considering that hydraulic oil is always present in the pipelines throughout the entire hydraulic system operation, to ensure the accuracy of the initially established first oil volume, the sum of the total oil volume in the oil tank 100, the multiple first hydraulic cylinders 200, and all pipelines at the first set time is calculated as the first oil volume. Correspondingly, the sum of the total oil volume in the oil tank 100, the multiple first hydraulic cylinders 200, and all pipelines at the second set time is calculated as the second oil volume. This ensures that the total oil volume in all pipelines can eventually be offset, and also uses the total oil volume in all pipelines as a parameter to verify the accuracy of the calculation.

[0090] See Figures 1 to 3 Furthermore, the step of comparing the difference between the first oil quantity and the second oil quantity with the third oil quantity to determine whether the hydraulic system is leaking includes:

[0091] If the difference between the first oil quantity and the second oil quantity is greater than the third oil quantity, it is determined that the hydraulic system is leaking oil.

[0092] If the difference between the first oil quantity and the second oil quantity is less than the third oil quantity, then the hydraulic system is determined to be leak-free.

[0093] See Figures 1 to 3 Furthermore, the step of comparing the difference between the first oil quantity and the second oil quantity with the third oil quantity to determine whether the hydraulic system is leaking includes:

[0094] The second oil quantity is set to the sum of the real-time hydraulic oil quantities of the oil tank 100 and the plurality of first hydraulic cylinders 200 during a set time period after the first set time.

[0095] If, within the set time period, the difference between the first oil quantity and the second oil quantity is always greater than the third oil quantity, then it is determined that the hydraulic system is leaking oil.

[0096] For example, the second oil volume is obtained in real time within 5 seconds after the first set time, where the second set time is any time within those 5 seconds. Correspondingly, if the difference between the first and second oil volumes is consistently greater than the third oil volume within the 5 seconds after the first set time, it indicates that the fluctuation in the hydraulic oil volume of the hydraulic system has not decreased, and it can be determined that the system is leaking oil, triggering an alarm.

[0097] Therefore, by ensuring that the difference between the first oil quantity and the second oil quantity is always greater than the third oil quantity within the set time period, the accuracy of oil leakage detection in the system is guaranteed. This avoids incorrect leakage detection and false alarms caused by fluctuations in the hydraulic oil quantity in the hydraulic system.

[0098] Specifically, the entire hydraulic system is configured to have i first hydraulic cylinders 200 and j second hydraulic cylinders 300;

[0099] First, calculate the first oil volume V1 at the first set time, which is the total volume of the hydraulic system at the first set time:

[0100] Using the formula: V t1 =A t *S t1 Obtain the hydraulic oil volume model within the 100mm oil tank, where:

[0101] V t1 The hydraulic oil level in tank 100 at the first set time, A t For a fuel tank with a base area of ​​100, S t1 The hydraulic oil level is the level detected by the liquid level sensor in the oil tank 100 at the first set time.

[0102] Using the formula: V p =∑A p *L p Obtain the total oil volume in all pipelines, where:

[0103] V p A represents the total oil volume in the pipeline. p L is the cross-sectional area within each section of the pipe. p This represents the length of each pipe segment.

[0104] According to the formula:

[0105] Obtain the hydraulic oil volume in multiple first hydraulic cylinders 200 at a first set time, wherein:

[0106] V c1 The total amount of hydraulic oil in the i first hydraulic cylinders 200 at the first set time;

[0107] A pn Let be the cross-sectional area of ​​the side without piston rod inside the nth first hydraulic cylinder 200;

[0108] A bn Let be the cross-sectional area of ​​the side with the piston rod inside the nth first hydraulic cylinder 200;

[0109] S cn The position of the piston rod of the first hydraulic cylinder 200 detected by the displacement sensor of the nth first hydraulic cylinder 200 at a first set time;

[0110] L cn This is the stroke of the piston rod of the nth first hydraulic cylinder 200.

[0111] Thus, the first fuel quantity V1 at the first set time is V t1 +V p +V c1 Completed.

[0112] Next, the second oil volume V2 at the second set time after the first set time, which is the total volume of the hydraulic system at the second set time:

[0113] Using the formula: V t2 =A t *S t2 Obtain the hydraulic oil volume model within the 100mm oil tank, where:

[0114] V t2 The hydraulic oil level in tank 100 at the second set time, A t For a fuel tank with a base area of ​​100, S t2The hydraulic oil level detected by the level sensor in the oil tank 100 at the second set time.

[0115] Using the formula: V p =∑A p *L p Obtain the total oil volume in all pipelines, where:

[0116] V p A represents the total oil volume in the pipeline. p L is the cross-sectional area within each section of the pipe. p This represents the length of each pipe segment.

[0117] According to the formula:

[0118] Obtain the hydraulic oil volume in multiple first hydraulic cylinders 200 at a second set time, wherein:

[0119] V c2 The total amount of hydraulic oil in the i first hydraulic cylinders 200 at the second set time;

[0120] A pn Let be the cross-sectional area of ​​the side without piston rod inside the nth first hydraulic cylinder 200;

[0121] A bn Let be the cross-sectional area of ​​the side with the piston rod inside the nth first hydraulic cylinder 200;

[0122] S cn The position of the piston rod of the first hydraulic cylinder 200 detected by the displacement sensor of the nth first hydraulic cylinder 200 at the second set time;

[0123] L cn This is the stroke of the piston rod of the nth first hydraulic cylinder 200.

[0124] Thus, the second oil quantity V2 = V at the second set time. t2 +V p +V c2 Completed.

[0125] Then, through the formula Calculate the total amount of third oil ΔV in j second hydraulic cylinders 300. N .

[0126] Next, the difference between the first oil quantity and the second oil quantity is compared with the third oil quantity to determine whether the hydraulic system is leaking oil.

[0127] Specifically, if V1-V2<△V N If so, it is determined that the system is not leaking oil;

[0128] If V1-V2>△V N If the fluctuation of the hydraulic oil volume in the hydraulic system does not decrease for K seconds, it can be determined that the system is leaking oil, and an alarm will be triggered.

[0129] In addition, this embodiment also provides a hydraulic system oil leakage detection device. The hydraulic system includes an oil tank 100, multiple first hydraulic cylinders 200 equipped with displacement sensors, and multiple second hydraulic cylinders 300 without displacement sensors, including:

[0130] The acquisition unit is configured to acquire the first oil volume in the oil tank 100 and the plurality of first hydraulic cylinders 200 at a first set time; the acquisition unit is also configured to acquire the second oil volume in the oil tank 100 and the plurality of first hydraulic cylinders 200 at a second set time after the first set time.

[0131] The judgment unit is used to determine whether the hydraulic system is leaking oil based on the first oil quantity, the second oil quantity, and the sum of the maximum changes in hydraulic oil within the plurality of second hydraulic cylinders 300; and

[0132] An alarm unit is activated when the judgment unit determines that the hydraulic system is leaking oil.

[0133] The first oil volume in the oil tank 100 and the plurality of first hydraulic cylinders 200 at a first set time is obtained by the acquisition unit; and the second oil volume in the oil tank 100 and the plurality of first hydraulic cylinders 200 at a second set time after the first set time can also be obtained; then the judgment unit determines whether the hydraulic system is leaking oil based on the sum of the first oil volume, the second oil volume and the maximum change in hydraulic oil in the plurality of second hydraulic cylinders 300; since the technical effect obtained by the hydraulic system oil leakage detection device is the same as that of the hydraulic system oil leakage detection method, the technical effect obtained by the hydraulic system oil leakage detection device will not be explained further.

[0134] In addition, this embodiment also provides an electronic device, including: a processor, a memory, and a program or instructions stored in the memory and executable on the processor. When the program or instructions are executed by the processor, they implement the hydraulic system oil leakage detection method. Since the technical effect achieved by the electronic device is the same as that of the hydraulic system oil leakage detection method, the technical effect achieved by the electronic device will not be explained further.

[0135] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A hydraulic system oil leakage detection method, the hydraulic system comprising an oil tank (100), a plurality of first hydraulic cylinders (200) provided with displacement sensors, a plurality of second hydraulic cylinders (300) not provided with displacement sensors, characterized in that, The method comprises: obtaining a first oil amount in the oil tank (100) and in the plurality of first hydraulic cylinders (200) at a first set time; obtaining a second oil amount in the oil tank (100) and in the plurality of first hydraulic cylinders (200) at a second set time after the first set time; obtaining a third oil amount, which is a sum of maximum hydraulic oil change amounts in the plurality of second hydraulic cylinders (300); comparing a difference between the first oil amount and the second oil amount with the third oil amount to determine whether the hydraulic system leaks oil, including: setting the second oil amount as a sum of real-time hydraulic oil amounts in the oil tank (100) and in the plurality of first hydraulic cylinders (200) within a set time period after the first set time; if the difference between the first oil amount and the second oil amount is always greater than the third oil amount within the set time period, determining that the hydraulic system leaks oil; the obtaining of the third oil amount, which is a sum of maximum hydraulic oil change amounts in the plurality of second hydraulic cylinders (300) includes: obtaining a maximum volume change amount of the second hydraulic cylinder (300); calculating the third oil amount according to the maximum volume change amount of the second hydraulic cylinder (300); the calculation of the third oil amount according to the maximum volume change amount of the second hydraulic cylinder (300) includes: According to the formula: ; obtaining the third oil amount, wherein: △V N is the total amount of the third oil in the j second hydraulic cylinders (300); A pm S m is the cross-sectional area of the mth second hydraulic cylinder (300) on the side without the piston rod; A bm A for the mth second hydraulic cylinder (300) inside the piston rod side of the cross-sectional area; L m is the stroke of the mth second hydraulic cylinder (300).

2. The hydraulic system oil leak detection method of claim 1, wherein the comparison of the difference between the first oil amount and the second oil amount with the third oil amount to determine whether the hydraulic system leaks oil further includes: if the difference between the first oil amount and the second oil amount is greater than the third oil amount, determining that the hydraulic system leaks oil; if the difference between the first oil amount and the second oil amount is less than the third oil amount, determining that the hydraulic system does not leak oil.

3. The hydraulic system oil leak detection method according to claim 1 or 2, characterized by, the obtaining of the first oil amount in the oil tank (100) and in the plurality of first hydraulic cylinders (200) at the first set time includes: setting a liquid level sensor in the oil tank (100), and obtaining the hydraulic oil amount in the oil tank (100) according to the hydraulic oil height in the oil tank (100) detected by the liquid level sensor at the first set time; obtaining the hydraulic oil amount in the plurality of first hydraulic cylinders (200) according to the piston rod position of the first hydraulic cylinder (200) detected by each displacement sensor at the first set time; obtaining the first oil amount according to the hydraulic oil amount in the oil tank (100) and the hydraulic oil amount in the plurality of first hydraulic cylinders (200).

4. The hydraulic system oil leak detection method of claim 3, wherein the obtaining of the hydraulic oil amount in the plurality of first hydraulic cylinders (200) according to the piston rod position of the first hydraulic cylinder (200) detected by each displacement sensor at the first set time includes: According to the formula: ; obtaining the hydraulic oil amount in the plurality of first hydraulic cylinders (200), wherein: V c1 Total amount of hydraulic oil in the i-th first hydraulic cylinder (200) for the first set time A pn A for the nth first hydraulic cylinder (200) inside the cross-sectional area without the piston rod side; A bn A for the nth first hydraulic cylinder (200) inside the piston rod side of the cross-sectional area; S cn the piston rod position of the first hydraulic cylinder (200) detected by the displacement sensor of the first hydraulic cylinder (200) for the first set time instant L cn is the stroke of the piston rod of the n-th first hydraulic cylinder (200).

5. The hydraulic system oil leak detection method according to claim 1 or 2, characterized by, all pipeline total oil amounts in all pipelines of the hydraulic system are contained in the first oil amount and the second oil amount, and the pipeline total oil amount is obtained according to the volume in all pipelines of the hydraulic system.

6. A hydraulic system oil leakage detection device, the hydraulic system comprising an oil tank (100), a plurality of first hydraulic cylinders (200) provided with displacement sensors, a plurality of second hydraulic cylinders (300) not provided with displacement sensors, characterized in that, a device for performing the hydraulic system oil leakage detection method according to any one of claims 1-5, comprising: An acquisition unit is configured to obtain a first oil amount in the oil tank (100) and in the plurality of first hydraulic cylinders (200) at a first set time; the acquisition unit is also configured to obtain a second oil amount in the oil tank (100) and in the plurality of first hydraulic cylinders (200) at a second set time after the first set time; A judgment unit is configured to judge whether the hydraulic system leaks oil according to the first oil amount, the second oil amount, and a sum of maximum hydraulic oil change amounts in the plurality of second hydraulic cylinders (300), and specifically configured to set the second oil amount as a sum of real-time hydraulic oil amounts in the oil tank (100) and in the plurality of first hydraulic cylinders (200) in a set time period after the first set time; if a difference between the first oil amount and the second oil amount is always greater than a third oil amount in the set time period, it is judged that the hydraulic system leaks oil; and An alarm unit is configured to alarm when the judgment unit judges that the hydraulic system leaks oil.

7. An electronic device, comprising: The hydraulic system leak detection method comprises: a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and the program or instructions are executed by the processor to implement the hydraulic system leak detection method according to any one of claims 1-5.

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