A hydraulic oil tank filter element detection method and device and a hydraulic system

Abstract

The present application relates to the field of hydraulic system, specifically, a kind of hydraulic oil tank filter element detection method, device and hydraulic system.A kind of hydraulic oil tank filter element detection method, for detecting the working state of multiple filter elements, multiple filter elements are simultaneously connected with hydraulic oil tank, it includes the following steps: obtaining the first signal of the pressure value in the hydraulic oil tank and obtaining the second signal of the pressure value of multiple filter elements;Calculate the pressure difference value of each filter element, wherein the pressure difference value is the absolute value of the pressure value of each filter element minus the pressure value of the hydraulic oil tank;Compare each pressure difference value with the corresponding filter element life pressure difference curve, obtain the life signal of each filter element;According to the life signal of each filter element, output the signal representing the working state of each filter element.The hydraulic oil tank filter element detection method can monitor the use state of each filter element in real time.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic systems, and in particular to a method and device for detecting a hydraulic oil tank filter element, and a hydraulic system. Background Art

[0002] Contamination in the hydraulic system is the main cause of hydraulic system failure. Therefore, corresponding filters are designed in various hydraulic systems of construction machinery such as excavators / rotary drilling rigs.

[0003] As the filter element intercepts contaminants in the system, its filtration efficiency decreases. To ensure system cleanliness, the filter element must be replaced. To ensure timely replacement, the supplier often provides a service life estimate to determine the replacement time. This approach fails to consider the characteristics of the hydraulic fluid, operating conditions, and the operator's maintenance awareness, and can easily contaminate the hydraulic system, leading to component damage and thus affecting equipment operation. Summary of the Invention

[0004] The objects of the present invention include, for example, providing a method, device and hydraulic system for detecting filter elements in a hydraulic oil tank, which can monitor the usage status of each filter element in real time.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, an embodiment provides a hydraulic oil tank filter element detection method for detecting the working status of multiple filter elements, wherein the multiple filter elements are simultaneously connected to the hydraulic oil tank, and the method includes the following steps:

[0007] Acquire a first signal representing a pressure value in a hydraulic oil tank and acquire a second signal representing a pressure value of a plurality of filter elements;

[0008] Calculate the pressure difference of each filter element, where the pressure difference is the absolute value of the pressure value of each filter element minus the pressure value of the hydraulic oil tank;

[0009] Compare each pressure difference value with the corresponding filter element life pressure difference curve to obtain the life signal of each filter element;

[0010] According to the life signal of each filter element, a signal representing the working status of each filter element is output.

[0011] In an optional embodiment, the step of outputting a signal representing the working status of each filter element according to the life signal of each filter element includes:

[0012] If the life signal of each filter element is greater than the first preset information, a signal indicating that each filter element is working normally is output;

[0013] If the life signal of one or more filter elements is within the first preset information interval, a signal indicating that the filter element needs to be replaced is output;

[0014] If the life signal of one or more filter elements is less than the second preset information, a signal indicating that the filter element needs to be replaced is output, and a shutdown signal and a buzzer alarm signal are output.

[0015] In an optional implementation manner, the first preset information is 0.1;

[0016] The first preset information interval is 0.03-0.1;

[0017] The second preset information is 0.03.

[0018] In an optional embodiment, after obtaining a first signal representing a pressure value in the hydraulic oil tank and obtaining a second signal representing pressure values ​​of multiple filter elements, the steps before calculating the pressure difference of each filter element include:

[0019] If the pressure of one of the filter elements is outside the first preset pressure range, a shutdown signal and a buzzer alarm signal are output.

[0020] In an optional embodiment, after obtaining a first signal representing a pressure value in the hydraulic oil tank and obtaining a second signal representing pressure values ​​of multiple filter elements, the steps before calculating the pressure difference of each filter element include:

[0021] If the pressure in the hydraulic oil tank is outside the second preset pressure range, a shutdown signal and a buzzer alarm signal are output.

[0022] In a second aspect, an embodiment provides a hydraulic oil tank filter element detection device, which includes a plurality of pressure sensors, a plurality of filter elements simultaneously connected to the hydraulic oil tank, and a controller;

[0023] The plurality of pressure sensors are respectively connected to the hydraulic oil tank and the plurality of filter elements to output a first signal representing the pressure of the hydraulic oil tank and a second signal representing the pressure of the plurality of filter elements;

[0024] The controller is used to obtain a first signal representing a pressure value in the hydraulic oil tank and a second signal representing a pressure value of a plurality of filter elements;

[0025] The controller is used to calculate the pressure difference of each filter element, wherein the pressure difference is the absolute value of the pressure value of each filter element minus the pressure value of the hydraulic oil tank;

[0026] The controller is used to compare each pressure difference value with the corresponding filter element life pressure difference curve to obtain the life signal of each filter element;

[0027] The controller is used to output a signal representing the working status of each filter element according to the life signal of each filter element.

[0028] In an optional embodiment, the plurality of filter elements include an oil return filter element, an oil drain filter element, and an oil suction filter element;

[0029] The plurality of pressure sensors include a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor;

[0030] The first pressure sensor is used to detect the pressure in the hydraulic oil tank;

[0031] The second pressure sensor is used to detect the pressure of the oil return filter element;

[0032] The third pressure sensor is used to detect the pressure of the oil drain filter element;

[0033] The fourth pressure sensor is used to detect the pressure of the oil suction filter element.

[0034] In an optional embodiment, the first pressure sensor is disposed in the hydraulic oil tank;

[0035] The second pressure sensor is arranged at the oil inlet of the oil return filter element;

[0036] The third pressure sensor is arranged at the oil inlet of the oil drain filter element;

[0037] The fourth pressure sensor is arranged at the oil outlet of the oil suction filter element.

[0038] In an optional embodiment, the hydraulic oil tank filter element detection device further includes a buzzer alarm electrically connected to the controller.

[0039] In a third aspect, an embodiment provides a hydraulic system comprising the above-mentioned hydraulic oil tank filter element detection device.

[0040] The beneficial effects of the embodiments of the present invention include:

[0041] The hydraulic oil tank filter element detection method collects the pressure data of the hydraulic oil tank and the filter element, and calculates the pressure difference of each filter element. The pressure difference of each filter element is then compared with the life pressure difference curve of the filter element, so as to obtain the working status of each filter element and monitor the working status of each filter element in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1Flowchart of a method for detecting a hydraulic oil tank filter element according to an embodiment of the present invention;

[0044] Figure 2 Schematic diagram of the structure of the hydraulic oil tank filter element detection device in an embodiment of the present invention;

[0045] Figure 3 Schematic diagram of the connection between the filter element and the pressure sensor in an embodiment of the present invention.

[0046] Icons: 200-Hydraulic oil tank filter detection device; 230-Pressure sensor; 210-Hydraulic oil tank; 220-Filter element; 240-Controller; 250-Buzzer alarm; 221-Return oil filter element; 222-Drain oil filter element; 223-Suction oil filter element; 231-First pressure sensor; 232-Second pressure sensor; 233-Third pressure sensor; 234-Fourth pressure sensor. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0050] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0051] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0052] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0053] Please refer to Figure 1 , Figure 1 A flow chart of a method for detecting a hydraulic oil tank filter element in an embodiment of the present invention is shown.

[0054] This embodiment provides a hydraulic oil tank filter element detection method for detecting the working status of multiple filter elements 220. The multiple filter elements 220 are simultaneously connected to the hydraulic oil tank 210. The method includes the following steps:

[0055] Acquire a first signal representing a pressure value in the hydraulic oil tank 210 and acquire a second signal representing a pressure value in the plurality of filter elements 220;

[0056] Calculate the pressure difference of each filter element 220, wherein the pressure difference is the absolute value of the pressure value of each filter element 220 minus the pressure value of the hydraulic oil tank 210;

[0057] Compare each pressure difference value with the corresponding life pressure difference curve of the filter element 220 to obtain a life signal of each filter element 220;

[0058] According to the life signal of each filter element 220, a signal representing the working status of each filter element 220 is output.

[0059] The working principle of this hydraulic oil tank filter element detection method is:

[0060] The hydraulic oil tank filter element detection method collects the pressure data of the hydraulic oil tank 210 and the filter element 220, and calculates the pressure difference of each filter element 220, and then compares the pressure difference of each filter element 220 with the life pressure difference curve of the filter element 220 to obtain the working status of each filter element 220.

[0061] Subsequently, by monitoring the working status of each filter element 220 , a signal corresponding to the working status of the filter element 220 can be output according to the working status of the filter element 220 .

[0062] Furthermore, in this embodiment, the step of outputting a signal representing the working status of each filter element 220 according to the life signal of each filter element 220 includes:

[0063] If the life signal of each filter element 220 is greater than the first preset information, a signal indicating that each filter element 220 is working normally is output;

[0064] If the life signal of one or more filter elements 220 is within the first preset information interval, a signal indicating that the filter element 220 needs to be replaced is output;

[0065] If the life signal of one or more filter elements 220 is less than the second preset information, a signal indicating that the filter element 220 needs to be replaced is output, and a shutdown signal and a buzzer alarm signal are output.

[0066] It should be noted that, through the above steps, the working status of each filter element 220 can be judged, so as to output a corresponding working status signal according to the working status of each filter element 220 .

[0067] Furthermore, the step of outputting a signal representing the working status of each filter element 220 according to the life signal of each filter element 220 includes:

[0068] If the life signal of each filter element 220 is greater than the first preset information, a signal indicating that each filter element 220 is working normally is output;

[0069] If the life signal of one or more filter elements 220 is within the first preset information interval, a signal indicating that the filter element 220 needs to be replaced is output;

[0070] If the life signal of one or more filter elements 220 is less than the second preset information, a signal indicating that the filter element 220 needs to be replaced is output, and a shutdown signal and a buzzer alarm signal are output.

[0071] It should be noted that when the controller 240 outputs a signal of normal operation, it means that each filter element 220 is in a normal working state and there is no need to replace the filter element 220; and when the controller 240 outputs a signal that the filter element 220 needs to be replaced, since in the above steps, the pressure difference value of each filter element 220 is compared with the corresponding life pressure difference curve of the filter element 220 to obtain the life signal of each filter element 220, so when the signal that the filter element 220 needs to be replaced is output, the controller 240 can determine the filter element 220 that needs to be replaced. In addition, when the controller 240 outputs a signal indicating that the filter element 220 needs to be replaced and outputs a shutdown signal and a buzzer alarm signal, it means that at least one of the filter elements 220 can no longer work normally and needs to be shut down in time to avoid damage to the entire system. Similarly, since in the above steps, the pressure difference value of each filter element 220 is compared with the corresponding life pressure difference curve of the filter element 220 to obtain the life signal of each filter element 220, when outputting the signal, the controller 240 can determine the filter element 220 that needs to be replaced.

[0072] Furthermore, in this embodiment, the first preset information of 0.1 means that the life signal of each filter element 220 is obtained by comparing each pressure difference value with the corresponding life pressure difference curve of the filter element 220, and the life of the filter element 220 obtained in this step is 10% left;

[0073] The first preset information interval of 0.03-0.1 means that by comparing each pressure difference value with the corresponding life pressure difference curve of the filter element 220, the life signal of each filter element 220 is obtained. The life of the filter element 220 obtained in this step is 3%-10%;

[0074] The second preset information of 0.03 means that the life signal of each filter element 220 is obtained by comparing each pressure difference value with the corresponding life pressure difference curve of the filter element 220. The life of the filter element 220 obtained in this step is 3%.

[0075] Furthermore, before calculating the working status and life of the filter element 220 based on the pressure of the filter element 220 and the pressure of the hydraulic oil tank 210, it is necessary to determine whether the pressure of the multiple filter elements 220 at this time is normal. Specifically, after obtaining a first signal representing the pressure value in the hydraulic oil tank 210 and obtaining a second signal representing the pressure values ​​of the multiple filter elements 220, the steps before calculating the pressure difference of each filter element 220 include:

[0076] If the pressure of one of the filter elements 220 is outside the first preset pressure range, a shutdown signal and a buzzer alarm signal are output.

[0077] Similarly, before calculating the working status and life of the filter element 220 based on the pressure of the filter element 220 and the pressure of the hydraulic oil tank 210, it is necessary to determine whether the pressure of the hydraulic oil tank 210 at this time is normal. Specifically, after obtaining a first signal representing the pressure value in the hydraulic oil tank 210 and obtaining a second signal representing the pressure values ​​of multiple filter elements 220, the steps before calculating the pressure difference of each filter element 220 include:

[0078] If the pressure in the hydraulic oil tank 210 is outside the second preset pressure range, a shutdown signal and a buzzer alarm signal are output.

[0079] Please refer to Figure 2 and Figure 3 , Figure 2 The structure of the hydraulic oil tank filter element detection device in the embodiment of the present invention is shown. Figure 3 The figure shows the arrangement of the filter element and the pressure sensor in the embodiment of the present invention.

[0080] Based on the above-mentioned hydraulic oil tank filter element detection method, this embodiment provides a hydraulic oil tank filter element detection device 200, which includes multiple pressure sensors 230, multiple filter elements 220 simultaneously connected to the hydraulic oil tank 210, and a controller 240.

[0081] The plurality of pressure sensors 230 are respectively connected to the hydraulic oil tank 210 and the plurality of filter elements 220 to output a first signal representing the pressure of the hydraulic oil tank 210 and a second signal representing the pressure of the plurality of filter elements 220;

[0082] The controller 240 is used to obtain a first signal representing a pressure value in the hydraulic oil tank 210 and obtain a second signal representing a pressure value of the plurality of filter elements 220;

[0083] The controller 240 is used to calculate the pressure difference of each filter element 220, wherein the pressure difference is the absolute value of the pressure value of each filter element 220 minus the pressure value of the hydraulic oil tank 210;

[0084] The controller 240 is used to compare each pressure difference value with the corresponding life pressure difference curve of the filter element 220 to obtain a life signal of each filter element 220;

[0085] The controller 240 is used to output a signal representing the working status of each filter element 220 according to the life signal of each filter element 220.

[0086] Furthermore, in this embodiment, the plurality of filter elements 220 include a return filter element 221, a drain filter element 222, and an oil suction filter element 223. It should be noted that in other embodiments of the present invention, the filter element 220 connected to the hydraulic oil tank 210 may be one or more of the return filter element 221, the drain filter element 222, and the oil suction filter element 223.

[0087] In addition, when the above-mentioned hydraulic oil tank filter element detection method is applied to the hydraulic oil tank 210 including the return oil filter element 221, the drain oil filter element 222 and the suction oil filter element 223, in order to enable the hydraulic oil tank filter element detection method to detect the working status of the return oil filter element 221, the drain oil filter element 222 and the suction oil filter element 223, the hydraulic oil tank filter element 220 detection device includes a first pressure sensor 231, a second pressure sensor 232, a third pressure sensor 233 and a fourth pressure sensor 234.

[0088] Among them, the first pressure sensor 231 is used to detect the pressure inside the hydraulic oil tank 210; the second pressure sensor 232 is used to detect the pressure of the return oil filter 221; the third pressure sensor 233 is used to detect the pressure of the drain filter 222; and the fourth pressure sensor 234 is used to detect the pressure of the suction filter 223.

[0089] In addition, the first pressure sensor 231 is arranged in the box body of the hydraulic oil tank 210; the second pressure sensor 232 is arranged at the oil inlet of the return oil filter 221; the third pressure sensor 233 is arranged at the oil inlet of the drain filter 222; and the fourth pressure sensor 234 is arranged at the oil outlet of the oil suction filter 223.

[0090] Furthermore, it should be noted that in other embodiments of the present invention, when the filter element 220 connected to the hydraulic oil tank 210 is one or more of the return oil filter element 221, the drain oil filter element 222 and the suction oil filter element 223, a corresponding pressure sensor 230 needs to be set according to the specific setting of the filter element 220.

[0091] Specifically, the hydraulic oil tank filter element detection device 200 comprises a first pressure sensor 231, the first pressure sensor 231 is used for detecting the tank pressure of the hydraulic oil tank 210, and the first pressure sensor 231 is arranged in the tank body of the hydraulic oil tank 210.

[0092] When the hydraulic oil tank filter element detection device 200 comprises the oil return filter element 221, the hydraulic oil tank filter element detection device 200 further comprises a second pressure sensor 232; the second pressure sensor 232 is used for detecting the pressure of the oil return filter element 221; and the second pressure sensor 232 is arranged at the oil inlet of the oil return filter element 221.

[0093] When the hydraulic oil tank filter element detection device 200 comprises the oil drain filter element 222, the hydraulic oil tank filter element detection device 200 further comprises a third pressure sensor 233; the third pressure sensor 233 is used for detecting the pressure of the oil drain filter element 222; and the third pressure sensor 233 is arranged at the oil inlet of the oil drain filter element 222.

[0094] When the hydraulic oil tank filter element detection device 200 comprises the oil suction filter element 223, the hydraulic oil tank filter element detection device 200 further comprises a fourth pressure sensor 234; the fourth pressure sensor 234 is used for detecting the pressure of the oil suction filter element 223, and the fourth pressure sensor 234 is arranged at the oil outlet of the oil suction filter element 223.

[0095] And when the first pressure sensor 231, the second pressure sensor 232, the third pressure sensor 233 and the fourth pressure sensor 234 are arranged at the same time, and the oil return filter element 221, the oil drain filter element 222 and the oil suction filter element 223 are arranged at the same time, the intervals of the first pressure sensor 231, the second pressure sensor 232, the third pressure sensor 233 and the fourth pressure sensor 234 relative to the hydraulic oil tank 210 are arranged to avoid interference between the pressure detection of the first pressure sensor 231, the second pressure sensor 232, the third pressure sensor 233 and the fourth pressure sensor 234.

[0096] In addition, when the life signal of one or more filter elements 220 is less than the second preset information, i.e. less than 3%, the hydraulic oil tank filter element detection device 200 can issue a buzzer alarm, so the hydraulic oil tank filter element detection device 200 further comprises a buzzer alarm 250 electrically connected to the controller 240.

[0097] Based on the above-mentioned hydraulic oil tank filter element detection device 200, the embodiment provides a hydraulic system comprising the above-mentioned hydraulic oil tank filter element detection device 200.

[0098] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for detecting a hydraulic oil tank filter element, for detecting the working status of multiple filter elements, wherein the multiple filter elements are simultaneously connected to the hydraulic oil tank, characterized in that: The hydraulic oil tank filter element detection method is performed using a hydraulic oil tank filter element detection device, which includes multiple pressure sensors, multiple filter elements connected to the hydraulic oil tank at the same time, and a controller; wherein the multiple pressure sensors are respectively connected to the hydraulic oil tank and the multiple filter elements, and the multiple pressure sensors include a first pressure sensor, which is disposed in the hydraulic oil tank; The hydraulic oil tank filter element detection method comprises the following steps: Acquire a first signal representing the pressure value in the hydraulic oil tank by the first pressure sensor, and acquire a second signal representing the pressure values ​​of multiple filter elements by multiple pressure sensors; The controller calculates a pressure difference value of each filter element, wherein the pressure difference value is an absolute value obtained by subtracting a pressure value of each filter element from a pressure value of the hydraulic oil tank; The controller compares each of the pressure difference values ​​with the corresponding life pressure difference curve of the filter element to obtain a life signal of each of the filter elements; The controller outputs a signal representing the working status of each filter element according to the life signal of each filter element; The step of outputting a signal representing the working status of each filter element by the controller according to the life signal of each filter element comprises: If the life signal of each filter element is greater than the first preset information, the controller outputs a signal indicating that each filter element is working normally; If the life signal of one or more of the filter elements is within a first preset information interval, the controller outputs a signal indicating that the filter element needs to be replaced; If the life signal of one or more of the filter elements is less than the second preset information, the controller outputs a signal indicating that the filter element needs to be replaced, a shutdown signal, and a buzzer alarm signal.

2. The hydraulic oil tank filter element detection method according to claim 1, characterized in that: The first preset information is 0.1; The first preset information interval is 0.03-0.1; The second preset information is 0.

03.

3. The hydraulic oil tank filter element detection method according to claim 1, characterized in that: After obtaining a first signal representing the pressure value in the hydraulic oil tank and obtaining a second signal representing the pressure values ​​of the plurality of filter elements, the steps before calculating the pressure difference value of each filter element include: If the pressure of one of the filter elements is outside the first preset pressure range, a shutdown signal and a buzzer alarm signal are output.

4. The hydraulic oil tank filter element detection method according to claim 1, characterized in that: After obtaining a first signal representing the pressure value in the hydraulic oil tank and obtaining a second signal representing the pressure values ​​of the plurality of filter elements, the steps before calculating the pressure difference value of each filter element include: If the pressure in the hydraulic oil tank is outside the second preset pressure range, a shutdown signal and a buzzer alarm signal are output.

5. The hydraulic oil tank filter element detection method according to claim 1, characterized in that: The plurality of filter elements include an oil return filter element, an oil drain filter element and an oil suction filter element; The plurality of pressure sensors include a second pressure sensor, a third pressure sensor, and a fourth pressure sensor; The first pressure sensor is used to detect the pressure in the hydraulic oil tank; The second pressure sensor is used to detect the pressure of the oil return filter element; The third pressure sensor is used to detect the pressure of the oil drain filter element; The fourth pressure sensor is used to detect the pressure of the oil suction filter element.

6. The hydraulic oil tank filter element detection method according to claim 5, characterized in that: The second pressure sensor is arranged at the oil inlet of the oil return filter element; The third pressure sensor is arranged at the oil inlet of the oil drain filter element; The fourth pressure sensor is arranged at the oil outlet of the oil suction filter element.

7. The hydraulic oil tank filter element detection method according to claim 1, characterized in that: The hydraulic oil tank filter element detection device also includes a buzzer alarm electrically connected to the controller.

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