A multifunctional retarder test oil circulation filtration system and method

Abstract

This invention discloses a multifunctional retarder test oil circulation filtration system and method, belonging to the field of retarders. This system utilizes a whole-machine control system to control each independent system as a whole. Automatic oil addition / return is achieved through an oil filling system and an oil return system. A multi-stage filtration system combining a filter media filtration system and a centrifugal filtration system is designed to target the particulate matter impurities in the oil, achieving high-precision oil filtration. An oil temperature control system ensures uniform oil temperature, and an oil particle size detection system effectively detects the particle size of the filtered oil. This system can achieve automated circulation filtration of retarder test oil, as well as automatic oil addition / return and post-filtration oil detection. It offers high filtration accuracy, requires no manual intervention, reduces labor intensity, meets various operating conditions, improves work efficiency, and facilitates maintenance and operation.

Description

Technical Field

[0001] This invention belongs to the field of retarders, specifically relating to a multifunctional oil circulation filtration system and method for retarder testing. Background Technology

[0002] A hydraulic retarder is a hydraulic speed reduction device, and the cleanliness of its assembly directly affects the product's performance, making it one of the important indicators for evaluating assembly quality. The cleanliness of a hydraulic retarder assembly is determined by multiple factors, including the cleanliness of parts, assembly, and test oil. Among these, the test oil, as the working medium in the retarder's testing process, plays a crucial role in flushing the assembly, and its cleanliness has a particularly significant impact on the overall cleanliness of the assembly.

[0003] Because the test oil is recycled, it contains a significant amount of impurities such as iron filings, aluminum filings, and gum. Furthermore, oil-water mixing occurs during retarder testing. Therefore, unfiltered oil or poorly filtered oil will rapidly deteriorate in cleanliness, affecting the overall assembly cleanliness and potentially causing secondary contamination of the retarder assembly. Retarder test oil requires a high cleanliness level, meeting ISO 4406-2017(E) cleanliness standard 17 / 12. Currently available oil filtration equipment typically uses a single filter cartridge structure, lacking water removal, particle size detection, and automatic oil addition / return functions. This results in high filter media consumption, excessive water content, uncontrolled oil cleanliness levels, inability to automatically add / return oil, and frequent and difficult maintenance, failing to meet the filtration requirements for retarder test oil. Summary of the Invention

[0004] This invention provides a multifunctional oil circulation filtration system and method for retarder testing, which can solve problems such as high filter material consumption, excessive water content, uncontrolled oil cleanliness, inability to automatically add / return oil, and frequent and difficult maintenance in oil filtration equipment.

[0005] To achieve the above objectives, the present invention employs the following technical content:

[0006] A multifunctional retarder test oil circulation filtration system includes:

[0007] An oil return system, wherein the oil return system is connected to an oil storage tank;

[0008] The oil storage tank is connected to a filter media filtration system, a centrifugal filtration system, and a refueling system.

[0009] The oil storage tank is equipped with an oil temperature control system.

[0010] The refueling system is connected to an oil particle size detection system;

[0011] The oil storage tank, the filter media filtration system, the centrifugal filtration system, the refueling system, the oil return system, the oil temperature control system, and the oil particle size detection system are all controlled by the overall machine control system.

[0012] Furthermore, the oil return system includes multiple sets of oil return ports; each set of oil return ports includes an oil drain rack; the oil drain rack is equipped with an oil drain tank, an oil return tank, and an oil return pump; the oil drain tank is connected to the oil return tank; a liquid level detector is installed inside the oil return tank; one end of the oil return pump is connected to the oil return tank, and the other end is connected to the oil storage tank through an oil return pipeline; a button box is installed on the oil return pump.

[0013] Furthermore, the oil storage tank includes a dirty oil tank, a transition oil tank, and a clean oil tank; the dirty oil tank is connected to the oil return system and the filter media filtration system respectively; the transition oil tank is connected to the filter media filtration system and the centrifugal filtration system respectively; and the clean oil tank is connected to the filter media filtration system.

[0014] Furthermore, the filter media filtration system includes a filter pump I and a level detector I installed in the dirty oil tank; the filter pump I is connected to the dirty oil tank, and the filter pump I is sequentially connected to a bag filter, a metal mesh filter, and a coalescing dehydration filter; a water content detection sensor is installed at the oil outlet pipe of the coalescing dehydration filter; the coalescing dehydration filter is connected to the transition oil tank; a level detector II is installed in the transition oil tank, and the transition oil tank is connected to the filter pump II, which is sequentially connected to a wire-wound filter and a melt-blown filter, and the melt-blown filter is connected to the clean oil tank; a level detector III is installed in the clean oil tank; and an air filter is installed on the clean oil tank.

[0015] Furthermore, the centrifugal filtration system includes a centrifugal filter, which is connected to the transition oil tank via a centrifugal pipeline.

[0016] Furthermore, the oil temperature control system includes an electric heater, an internal circulation pump, and a temperature controller installed in the clean oil tank; the temperature controller is connected to the electric heater and the internal circulation pump respectively.

[0017] Furthermore, the refueling system includes multiple sets of refueling ports; each set of refueling ports includes a refueling pump connected to the clean fuel tank; the refueling pump is sequentially connected to a safety filter and a refueling pipe; the refueling pump is equipped with an overflow valve, and the refueling pipe is connected to the dirty fuel tank.

[0018] Furthermore, the oil particle size detection system includes a detection pipeline connected to the refueling pump; the detection pipeline is sequentially connected to a constant temperature chamber and a particle size analyzer; the particle size analyzer is equipped with a solenoid valve.

[0019] Furthermore, the overall control system includes a programmable logic controller, a touch screen, and an electrical control system;

[0020] The programmable logic controller is connected to the touch screen and the electrical control system respectively; the electrical control system is connected to the oil storage tank, the filter media filtration system, the centrifugal filtration system, the refueling system, the oil return system, the oil temperature control system and the oil particle size detection system respectively.

[0021] A method for circulating and filtering oil for testing a multifunctional retarder, based on the aforementioned multifunctional retarder testing oil circulation and filtration system, includes:

[0022] The overall control system pumps the oil after the retarder test run to the oil storage tank through the oil return system. The oil is filtered by the filter media filtration system and the centrifugal filtration system. The temperature of the filtered oil is controlled by the oil temperature control system. The oil filling system adds the filtered oil into the retarder. At the same time as adding oil, the oil particle size detection system detects the particle size of the filtered oil.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This invention provides a multifunctional retarder test oil circulation and filtration system. The system utilizes a comprehensive control system to manage all independent systems. Automatic oil filling and return are achieved through a filling system and a return system. A multi-stage filtration system combining a filter media filtration system and a centrifugal filtration system is designed to address the particulate matter impurities in the oil, achieving high-precision filtration. An oil temperature control system ensures uniform oil temperature, and an oil particle size detection system effectively detects the particle size of the filtered oil. This system enables automated circulation and filtration of retarder test oil, as well as automatic oil filling / return and post-filtration oil detection. It offers high filtration accuracy, requires no manual intervention, reduces labor intensity, meets various operating conditions, improves work efficiency, and facilitates maintenance and operation.

[0025] Preferably, in this invention, the oil return system includes multiple sets of oil return ports, and each set of oil return ports includes an oil drain rack, an oil drain tank, an oil return tank, and an oil return pump. The oil is pumped from the oil return tank to the storage tank via the oil return pump and oil return pipeline. Each oil return tank is also equipped with a level detector to facilitate real-time monitoring of the oil level. The automatic oil return function is activated based on the monitoring results. Additionally, a button box is provided on the oil return pump for manual control of the oil return function. This allows for independent operation of each set of oil return ports, provides automatic oil return without manual intervention, reduces manual labor, and lowers labor intensity.

[0026] Preferably, in this invention, the oil storage tank includes a dirty oil tank, a transition oil tank, and a clean oil tank. The dirty oil tank is used to store the oil to be filtered, the transition oil tank is used for temporary storage of the filtered oil, and works in conjunction with the filter media filtration system and the centrifugal filtration system to achieve multi-stage filtration of the oil. The clean oil tank is used to store the filtered oil, which is used for refueling by the refueling system and for detection by the oil particle size detection system.

[0027] Preferably, in this invention, the filter media filtration system includes a bag filter, a metal mesh filter, and a coalescing dehydration filter, which, in conjunction with filter pump I, achieve preliminary filtration of the test oil, filtering out impurities and moisture in the oil. Then, through a wound filter and a melt-blown filter, in conjunction with filter pump II, fine filtration of the test oil is achieved. When the oil enters the filter element inside the filter cartridge, impurities in the oil are intercepted outside the filter element, and clean oil flows into the inner cavity of the filter element. The detection results of level detectors II and III determine whether the filtration function needs to be activated. Additionally, an air filter is installed above the clean oil tank to prevent water from the air from entering the oil.

[0028] Preferably, in this invention, the centrifugal filtration system employs a centrifugal filter and a centrifugal pipeline. The oil pump on the centrifugal filter automatically draws oil from the transition oil tank for centrifugal filtration, and then flows into the transition oil tank from the centrifugal pipeline, thereby achieving physical filtration of the oil in the transition oil tank.

[0029] As can be seen, the multi-stage filtration system developed specifically for the particulate impurities in the retarder test oil has high filtration precision. It can filter not only impurities such as iron filings, aluminum filings, colloids, and hair from the oil, but also water, thus ensuring the cleanliness requirements of the retarder test oil. In addition, this invention adopts a green manufacturing design concept, using inexpensive bag filters and reusable metal filters to filter large particulate impurities, adhesive impurities, and metal particles, reducing the filtration pressure of subsequent filter elements and reducing the consumption of high-precision filter media. At the same time, in addition to traditional filter media filtration, a centrifugal filter is added for physical filtration, which greatly reduces the consumption of filter media and saves production costs. Furthermore, this invention is designed with ease of maintenance in mind. All filters are located on the outside of the entire circulating filtration system, and the filter element supports are all integrated, allowing them to be removed from the filter cartridge for filter element replacement outside the cartridge. This unified installation facilitates maintenance and cleaning.

[0030] Preferably, in this invention, the oil temperature control system includes an electric heater, an internal circulation pump, and a temperature controller in the clean oil tank. The temperature controller controls the electric heater and the internal circulation pump and detects the oil temperature, thereby achieving a constant output oil temperature.

[0031] Preferably, in this invention, the refueling system includes multiple sets of refueling ports, and each set of refueling ports includes a refueling pump and a refueling pipe. The refueling pump adds filtered oil from the clean oil tank to the retarder. In addition, a safety filter is installed between the refueling pump and the refueling pipe to prevent possible unexplained contamination in the clean oil tank, and can also detect the degree of dirtiness of the filter element and issue an alarm signal. The refueling pump is also equipped with an overflow valve to protect the refueling pump. When the refueling pipe is blocked, the oil returns to the dirty oil tank through the overflow valve. It can meet the independent operation of each set of refueling ports, has quantitative and automatic refueling functions, requires no manual intervention, reduces manual work, and lowers labor intensity.

[0032] More preferably, in this invention, the oil particle size detection system includes a refueling pump. When refueling any set of refueling circuits, the refueling pump sends the oil into the detection pipeline. The solenoid valve on the corresponding detection pipeline automatically opens. After the oil is heated in a constant temperature chamber and the temperature stabilizes, it is sent to the particle size analyzer for detection. This process can effectively solve the problem that temperature has a great influence on the particle size detection results, and the detection results are more accurate.

[0033] Preferably, in this invention, the overall control system includes a programmable logic controller (PLC), a touch screen, and an electrical control system. The PLC, in conjunction with the electrical control system, can automate the filtration, oil filling / return, and detection functions of the overall circulating filtration system. Parameters such as oil filling time, oil filling amount, cleanliness upper and lower limits, temperature upper and lower limits, and particle size detection interval can all be manually set on the touch screen. Simultaneously, manual / automatic control switching can be achieved for various electrical components, pumps, solenoid valves, etc. The touch screen can display the operating status and alarm information of the oil filtration system, prompting the operator to restore the equipment.

[0034] This invention also provides a multifunctional retarder test oil circulation filtration method. This method can solve the problems of high filter material consumption, excessive water content, uncontrolled oil cleanliness, inability to automatically add / return oil, and frequent and difficult maintenance of oil filtration equipment on the market. Using this method can effectively improve the filtration accuracy of test oil and realize automated oil addition / return and oil filtration detection operations. Attached Figure Description

[0035] Figure 1 A schematic diagram of a multifunctional retarder test oil circulation filtration system provided in an embodiment of the present invention;

[0036] Figure 2 This invention provides a schematic diagram of the various mechanisms of a multifunctional retarder test oil circulation filtration system.

[0037] Figure 3 A schematic diagram of a multifunctional retarder test oil circulation filtration system provided in an embodiment of the present invention;

[0038] Figure 4 The flowchart illustrates a method for oil circulation filtration during testing of a multifunctional retarder, as provided by this invention.

[0039] Figure label:

[0040] 1. Oil storage tank; 2. Filter media filtration system; 3. Centrifugal filtration system; 4. Oil filling system; 5. Oil return system; 6. Oil temperature control system; 7. Oil particle size detection system; 8. Overall machine control system;

[0041] 1.1 Dirty oil tank; 1.2 Transition oil tank; 1.3 Clean oil tank; 1.4 Inspection window; 1.5 Oil return port; 2.1 Filter pump I; 2.2 Level detector I; 2.3 Bag filter; 2.4 Metal mesh filter; 2.5 Filter pump II; 2.6 Level detector II; 2.7 Meltblown filter; 2.8 Wire-wound filter; 2.9 Coalescing dehydration filter; 2.10 Moisture content sensor; 2.11 Air filter; 2.12 Level detector III; 3.1 3.1 Centrifugal filter; 4.2 Centrifugal pipeline; 4.1 Oil pump; 4.2 Safety filter; 4.3 Overflow valve; 4.4 Oil filling pipe; 5.1 Oil drain rack; 5.2 Oil drain tank; 5.3 Return oil tank; 5.4 Liquid level detector; 5.5 Return oil pump; 5.6 Return oil pipeline; 5.7 Button box; 6.1 Electric heater; 6.2 Internal circulation pump; 6.3 Temperature controller; 7.1 Constant temperature chamber; 7.2 Particle size analyzer; 7.3 Solenoid valve; 7.4 Detection pipeline. Detailed Implementation

[0042] To make the technical problems solved by the present invention, the technical solutions, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of the present invention. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0043] like Figure 1 As shown, the present invention provides a multifunctional retarder test oil circulation filtration system, characterized in that it includes:

[0044] Oil return system 5, which is connected to oil storage tank 1;

[0045] The oil storage tank 1 is connected to a filter media filtration system 2, a centrifugal filtration system 3, and a refueling system 4.

[0046] An oil temperature control system 6 is installed inside the oil storage tank 1;

[0047] The refueling system 4 is connected to the oil particle size detection system 7;

[0048] The oil storage tank 1, filter media filtration system 2, centrifugal filtration system 3, refueling system 4, oil return system 5, oil temperature control system 6, and oil particle size detection system 7 are all controlled by the whole machine control system 8.

[0049] The specific structure is as follows:

[0050] The oil return system 5 includes multiple sets of oil return ports; each set of oil return ports includes an oil drain rack 5.1; the oil drain rack 5.1 is equipped with an oil drain tank 5.2, an oil return tank 5.3 and an oil return pump 5.5; the oil drain tank 5.2 is connected to the oil return tank 5.3; the oil return tank 5.3 is equipped with a liquid level detector 5.4; one end of the oil return pump 5.5 is connected to the oil return tank 5.3, and the other end is connected to the oil storage tank 1 through the oil return pipeline 5.6; the oil return pump 5.5 is equipped with a button box 5.7.

[0051] The oil storage tank 1 includes a dirty oil tank 1.1, a transition oil tank 1.2, and a clean oil tank 1.3; the dirty oil tank 1.1 is connected to the oil return system 5 and the filter media filtration system 2 respectively; the transition oil tank 1.2 is connected to the filter media filtration system 2 and the centrifugal filtration system 3 respectively; and the clean oil tank 1.3 is connected to the filter media filtration system 2.

[0052] The filter media filtration system 2 includes a filter pump I 2.1 and a level detector I 2.2 installed in the dirty oil tank 1.1. The filter pump I 2.1 is connected to the dirty oil tank 1.1, and the filter pump I 2.1 is sequentially connected to a bag filter 2.3, a metal mesh filter 2.4, and a coalescing dehydration filter 2.9. A water content detection sensor 2.10 is installed at the oil outlet pipe of the coalescing dehydration filter 2.9. The coalescing dehydration filter 2.9 is connected to the transition oil tank 1.2. A level detector II 2.6 is installed in the transition oil tank 1.2, and the transition oil tank 1.2 is connected to a filter pump II 2.5. The filter pump II 2.5 is sequentially connected to a wound filter 2.8 and a melt-blown filter 2.7, and the melt-blown filter 2.7 is connected to the clean oil tank 1.3. A level detector III 2.12 is installed in the clean oil tank 1.3. An air filter 2.11 is installed on the clean oil tank 1.3.

[0053] The centrifugal filtration system 3 includes a centrifugal filter 3, which is connected to the transition oil tank 1.2 via a centrifugal pipeline 3.2.

[0054] The oil temperature control system 6 includes an electric heater 6.1, an internal circulation pump 6.2, and a temperature controller 6.3, all located in the clean oil tank 1.3. The temperature controller 6.3 is connected to the electric heater 6.1 and the internal circulation pump 6.2, respectively.

[0055] The refueling system 4 includes multiple sets of refueling ports; each set of refueling ports includes a refueling pump 4.1 connected to the clean oil tank 1.3; the refueling pump 4.1 is connected in sequence to a safety filter 4.2 and a refueling pipe 4.4; an overflow valve 4.3 is installed on the refueling pump 4.1; a branch of the refueling pipe 4.4 is connected to the dirty oil tank 1.1.

[0056] The oil particle size detection system 7 includes a detection pipeline 7.4 connected to the refueling pump 4.1; the detection pipeline 7.4 is connected in sequence to a constant temperature chamber 7.1 and a particle size detector 7.2; the particle size detector is equipped with a solenoid valve 7.3.

[0057] The overall control system includes a programmable logic controller, a touch screen, and an electrical control system;

[0058] The programmable logic controller is connected to the touch screen and the electrical control system respectively; the electrical control system is connected to the oil storage tank 1, the filter media filtration system 2, the centrifugal filtration system 3, the refueling system 4, the oil return system 5, the oil temperature control system 6, and the oil particle size detection system 7 respectively.

[0059] This invention also provides a method for circulating and filtering oil for testing a multifunctional retarder, based on the above-mentioned multifunctional retarder testing oil circulation and filtration system, comprising:

[0060] The whole machine control system 8 pumps the oil after the retarder test run to the oil storage tank 1 through the oil return system 5. The oil is filtered by the filter material filtration system 2 and the centrifugal filtration system 3. The temperature of the filtered oil is controlled by the oil temperature control system 6. The oil filling system 4 adds the filtered oil into the retarder. At the same time as adding oil, the oil particle size detection system 7 detects the oil particle size of the filtered oil.

[0061] The present invention will be further explained and described below with reference to the accompanying drawings and embodiments:

[0062] Example

[0063] like Figure 1 As shown, a multifunctional retarder test oil circulation filtration system is described, specifically:

[0064] It consists of an oil storage tank 1, a filter media filtration system 2, a physical filtration system 3, a refueling system 4, an oil return system 5, an oil temperature control system 6, an oil particle size detection system 7, and a whole machine control system 8.

[0065] like Figure 2 As shown, the specific structure is as follows:

[0066] Furthermore, the oil storage tank 1 is composed of a dirty oil tank 1.1, a transition oil tank 1.2, and a clean oil tank 1.3. The dirty oil tank 1.1 is equipped with an inspection window 1.4, which facilitates observation and maintenance, and is equipped with five sets of oil return ports.

[0067] Furthermore, the filter media filtration system 2 is divided into a five-stage filtration process: bag filter 2.3 (25μm) → metal mesh filter 2.4 (25μm) → coalescing dehydration filter 2.9 → wound filter 2.8 (10μm) → meltblown filter 2.7 (3μm). Bag filter 2.3, metal mesh filter 2.4, and coalescing dehydration filter 2.9 are installed between dirty oil tank 1.1 and transition oil tank 1.2, and are driven by filter pump I 2.1; wire-wound filter 2.8 and melt-blown filter 2.7 are installed between transition oil tank 1.2 and clean oil tank 1.3, and are driven by filter pump II 2.5; each filter is equipped with a voltage pressure sensor at its inlet and outlet; the outlet of coalescing dehydration filter 2.9 is equipped with a water content detection sensor 2.10; an air filter 2.11 is installed on clean oil tank 1.2; in addition, each of dirty oil tank 1.1, transition oil tank 1.2, and clean oil tank 1.3 is equipped with a level detector, namely level detector I 2.2, level detector II 2.6, and level detector III 2.12, respectively.

[0068] Furthermore, the physical filtration system 3 consists of a centrifugal filter 3.1 and a centrifugal pipeline 3.2, which are externally connected to the transition oil tank 1.2 to perform physical filtration of the oil in the transition oil tank 1.2.

[0069] Furthermore, the refueling system 4 consists of 5 independent refueling ports, each consisting of a refueling pump 4.1, a safety filter 4.2, an overflow valve 4.4, and a refueling pipe 4.4.

[0070] Furthermore, the oil return system 5 consists of an oil drain rack 5.1, an oil drain tank 5.2, an oil return tank 5.3, a liquid level detector 5.4, an oil return pump 5.5, an oil return pipeline 5.6, and a button box 5.7.

[0071] Furthermore, the oil temperature control system 6 consists of an electric heater 6.1, an internal circulation pump 6.2, and a temperature controller 6.3.

[0072] Furthermore, the oil particle size detection system 7 consists of a constant temperature chamber 7.1, a particle size detector 7.2, a solenoid valve 7.3, and a detection pipeline 7.4.

[0073] Furthermore, the overall control system consists of a PLC (Programmable Logic Controller), a touch screen, pressure sensors, electrical components, and an electrical control system.

[0074] Combination Figure 3 and Figure 4 As shown, the specific steps of the filtration process of the above-mentioned multifunctional retarder test oil circulation filtration system include:

[0075] The normal operation of this invention can be divided into 7 steps, as follows:

[0076] 1. Oil return process: After the retarder is manually tested, the oil is put into the drain tank 5.2 and then flows into the return tank 5.3. The level detector 5.4 monitors the level in the return tank 5.3 in real time. When the level reaches the set high level, the return pump 5.5 starts automatically and pumps the oil through the return pipeline 5.6 to the dirty oil tank 1.1 of the oil filter. When the level reaches the set low level, the return pump 5.5 stops automatically, realizing automatic oil return. At the same time, the return pump 5.5 can be controlled by the return button on the button box 5.7 to draw out the oil in the return tank. After releasing the button, the return pump 5.5 stops.

[0077] 2. Filter media filtration process: Filter media filtration is divided into two parts: primary filtration and fine filtration;

[0078] The primary filtration process involves the following steps: When level detector II 2.6 detects that the transition oil tank 1.2 is at a low level, while level detector I 2.2 detects that the dirty oil tank 1.1 is not at a low level, filter pump I 2.1 sends the dirty oil into the bag filter 2.3, the metal mesh filter 2.4, and the coalescing dehydration filter 2.9. When the oil enters the filter bags and metal mesh inside the filter cartridges, impurities in the oil are intercepted inside the filter bags and metal mesh, while clean oil flows to the outside of the filter bags and metal mesh. When the oil passes through the coalescing dehydration filter 2.9, it adsorbs water onto the water-absorbing filter element. A water content detection sensor 2.10 is installed at the oil outlet of the coalescing dehydration filter 2.9 to detect the water content in the oil in real time. When the water content exceeds the set value, an alarm signal will be issued. After filtration, the oil flows into the transition oil tank 1.2.

[0079] Fine filtration process: When level detector Ⅲ2.12 detects that the clean oil tank 1.3 is at a low level, while level detector Ⅱ2.6 detects that the transition oil tank 1.2 is not at a low level, filter pump Ⅱ2.5 sequentially sends the oil from the transition oil tank 1.2 into the wound filter 2.8 and the melt-blown filter 2.7. When the oil enters the filter element inside the filter cartridge, impurities in the oil are intercepted outside the filter element, and clean oil flows into the inner cavity of the filter element, and then into the clean oil tank 1.3, thus achieving fine filtration. Each stage of the filter is equipped with a pressure sensor at the inlet and outlet to detect the degree of dirtiness of the filter element. An alarm signal will be issued when the filter element resistance increases to a set value. The clean oil tank 1.3 has an air filter 2.11 to prevent water from the air from entering the oil.

[0080] 3. Centrifugal Filtration Process: Centrifugal filter 3.1 is externally connected to transition oil tank 1.2 via centrifugal pipeline 3.2. During filtration, the oil pump on centrifugal filter 3.1 automatically draws oil from transition oil tank 1.2 for centrifugal filtration, and then flows into transition oil tank 1.2 from centrifugal pipeline 3.2, thus achieving physical filtration of the oil in transition oil tank.

[0081] 4. Particle size detection process: Each of the five refueling circuits is connected to the particle size analyzer 7.2 via a bypass. When refueling is carried out in any refueling circuit, the refueling pump 4.1 sends the oil into the detection pipeline 7.4. The solenoid valve 7.3 on the corresponding detection pipeline 7.4 opens automatically. After the oil is heated by the constant temperature chamber 7.1, the temperature is stabilized between 60-70℃ before being sent to the particle size analyzer 7.2 for detection. This process can effectively solve the problem that temperature has a great influence on the particle size detection results, and the detection results are more accurate.

[0082] Here, the particle size analyzer 7.2 is the SCMC model from the German company STAUFF, equipped with a defoaming device to eliminate foam caused by various reasons, avoid miscounting of foam by the particle counter, and ensure that each test is conducted under the same basic conditions and is comparable.

[0083] 5. Oil Temperature Control Process: The clean oil tank 1.3 is equipped with an electric heater 6.1, an internal circulation pump 6.2, and a temperature controller 6.3. The electric heater 6.1 is used to heat the oil; the internal circulation pump 6.2 is used to stir and circulate the oil in the clean oil tank 1.3 to achieve a uniform temperature; the temperature controller 6.3 is located away from the electric heater 6.1 and is used to detect the oil temperature and control the start and stop of the electric heater 6.1 and the internal circulation pump 6.2. When the oil temperature is set to 50±5℃, if the oil temperature is below 45℃, the temperature controller 6.3 controls the electric heater 6.1 to heat and the internal circulation pump 6.2 to circulate; if the temperature exceeds 55℃, the temperature controller 6.3 controls the electric heater 6.1 to stop heating, and the internal circulation pump 6.2 automatically runs for 2 minutes every 5 minutes, thereby ensuring a uniform oil temperature throughout the clean oil tank 1.3.

[0084] 6. Refueling Process: The refueling system 4 is equipped with five independent refueling pumps 4.1, safety filters 4.2, overflow valves 4.3, and refueling pipes 4.4, which can draw clean oil from the clean oil tank 1.3. The refueling pump 4.1 is a gear pump with a variable frequency motor controlling the pump speed and refueling volume. The safety filter 4.2 uses a 3μm glass fiber filter element to prevent possible unexplained contamination in the clean oil tank 1.3. Pressure sensors are installed at the filter inlet and outlet to detect the degree of filter element dirtiness; an alarm signal is issued when the filter element resistance increases to a set value. The overflow valve 4.3 protects the refueling pump 4.1; when the refueling pipe is blocked, the oil returns to the dirty oil tank 1.1 via the overflow valve 4.3. When refueling in any refueling circuit, the refueling pump 4.1 sends the oil to the safety filter 4.2. After filtration, the oil is then added to the retarder via the refueling pipe 4.4. The variable frequency pump controls the refueling speed and volume to achieve quantitative refueling.

[0085] 7. Overall Machine Control Process: The system employs an independent PLC (Programmable Logic Controller), touchscreen, and electrical control system. Parameters such as refueling time, refueling volume, cleanliness limits, temperature limits, and particle size detection interval can all be manually set on the touchscreen. Manual / automatic control switching for various electrical components, pumps, and solenoid valves is also possible. The touchscreen displays the oil filter's operating status and alarm information, prompting the operator to restore the equipment. The electrical control system includes multiple voltage and pressure sensors installed in both the filter media filtration system and the physical filtration system, capable of detecting the degree of filter element dirtiness and issuing alarm signals.

[0086] The multifunctional retarder test oil circulation filtration system and method provided in this embodiment have the following advantages:

[0087] I. This embodiment is a multi-stage filtration system developed for the particulate impurities in the retarder test oil. It has high filtration accuracy and can filter not only impurities such as iron filings, aluminum filings, colloids, and hair in the oil, but also water in the oil, thereby ensuring the cleanliness requirements of the retarder test oil.

[0088] Second, this embodiment realizes online monitoring of the cleanliness and water content of the test oil, and real-time monitoring of the filtration capacity and cleanliness of the oil filter. In particular, the addition of a constant temperature chamber for constant temperature control of the oil to be tested solves the problem that temperature has a great influence on the particle size detection results. When the detection results are problematic, the machine will automatically alarm and stop, and the alarm information will be provided to the operator, ensuring the controllability of the filtration accuracy of the test oil.

[0089] Third, this embodiment adopts green manufacturing as its design concept, using inexpensive bag filters and recyclable metal filters to filter large particulate impurities, adhesive impurities and metal particles, reducing the filtration pressure of downstream filter cartridges and reducing the consumption of high-precision filter media. At the same time, in addition to traditional filter media filtration, a centrifugal filter is added for physical filtration, which greatly reduces the consumption of filter media and saves production costs.

[0090] Fourth, this embodiment is designed with ease of maintenance in mind. All filters are located on the outside of the oil filter machine, and the filter element supports are all designed as an integrated unit. They can be removed from the filter cartridge and the filter elements can be replaced from the outside of the filter cartridge. The unified installation makes it easy to maintain and clean.

[0091] Fifth, this embodiment achieves a constant output oil temperature, eliminating the problem of temperature having a significant impact on oil viscosity. It can meet the independent operation of five sets of filling ports and five sets of return ports, and has quantitative filling and automatic return functions. No manual intervention is required, reducing manual work and labor intensity.

[0092] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A multifunctional retarder test oil circulation filtration system, characterized in that, include: Oil return system (5), wherein the oil return system (5) is connected to an oil storage tank (1); The oil storage tank (1) is connected to a filter media filtration system (2), a centrifugal filtration system (3), and a refueling system (4). The oil storage tank (1) is equipped with an oil temperature control system (6). The refueling system (4) is connected to an oil particle size detection system (7); The oil storage tank (1), the filter media filtration system (2), the centrifugal filtration system (3), the refueling system (4), the oil return system (5), the oil temperature control system (6), and the oil particle size detection system (7) are all controlled by the whole machine control system (8); The oil return system (5) includes multiple sets of oil return ports; each set of oil return ports includes an oil drain rack (5.1); the oil drain rack (5.1) is equipped with an oil drain tank (5.2), an oil return tank (5.3), and an oil return pump (5.5); the oil drain tank (5.2) is connected to the oil return tank (5.3); a liquid level detector (5.4) is installed inside the oil return tank (5.3); one end of the oil return pump (5.5) is connected to the oil return tank (5.3), and the other end is connected to the oil storage tank (1) through an oil return pipeline (5.6); a button box (5.7) is installed on the oil return pump (5.5). The filter media filtration system (2) includes a filter pump I (2.1) and a level detector I (2.2) installed inside the dirty oil tank (1.1); the filter pump I (2.1) is connected to the dirty oil tank (1.1), and the filter pump I (2.1) is sequentially connected to a bag filter (2.3), a metal mesh filter (2.4), and a coalescing dehydration filter (2.9); a water content detection sensor (2.10) is installed at the oil outlet pipe of the coalescing dehydration filter (2.9); the coalescing dehydration filter (2.9) and... A transition oil tank (1.2) is connected; a level detector II (2.6) is installed in the transition oil tank (1.2); a filter pump II (2.5) is connected to the transition oil tank (1.2); a wire-wound filter (2.8) and a melt-blown filter (2.7) are connected in sequence to the filter pump II (2.5); the melt-blown filter (2.7) is connected to the clean oil tank (1.3); a level detector III (2.12) is installed in the clean oil tank (1.3); an air filter (2.11) is installed on the clean oil tank (1.3). The refueling system (4) includes multiple sets of refueling ports; each set of refueling ports includes a refueling pump (4.1) connected to the clean oil tank (1.3). The oil particle size detection system (7) includes a detection pipeline (7.4) connected to the refueling pump (4.1); the detection pipeline (7.4) is connected in sequence to a constant temperature chamber (7.1) and a particle size detector (7.2); the particle size detector is equipped with a solenoid valve (7.3).

2. The multifunctional retarder test oil circulation filtration system according to claim 1, characterized in that, The oil storage tank (1) includes a dirty oil tank (1.1), a transition oil tank (1.2), and a clean oil tank (1.3); the dirty oil tank (1.1) is connected to the return oil system (5) and the filter media filtration system (2) respectively; the transition oil tank (1.2) is connected to the filter media filtration system (2) and the centrifugal filtration system (3) respectively; and the clean oil tank (1.3) is connected to the filter media filtration system (2).

3. The multifunctional retarder test oil circulation filtration system according to claim 2, characterized in that, The centrifugal filtration system (3) includes a centrifugal filter (3.1), which is connected to the transition oil tank (1.2) via a centrifugal pipeline (3.2).

4. The multifunctional retarder test oil circulation filtration system according to claim 2, characterized in that, The oil temperature control system (6) includes an electric heater (6.1), an internal circulation pump (6.2), and a temperature controller (6.3) installed in the clean oil tank (1.3); the temperature controller (6.3) is connected to the electric heater (6.1) and the internal circulation pump (6.2) respectively.

5. The multifunctional retarder test oil circulation filtration system according to claim 2, characterized in that, The fuel pump (4.1) is connected in sequence to a safety filter (4.2) and a fuel pipe (4.4); the fuel pump (4.1) is equipped with an overflow valve (4.3), and the fuel pipe (4.4) is connected to the dirty fuel tank (1.1).

6. The multifunctional retarder test oil circulation filtration system according to claim 1, characterized in that, The overall control system includes a programmable logic controller, a touch screen, and an electrical control system; The programmable logic controller is connected to the touch screen and the electrical control system respectively; the electrical control system is connected to the oil storage tank (1), the filter media filtration system (2), the centrifugal filtration system (3), the refueling system (4), the oil return system (5), the oil temperature control system (6) and the oil particle size detection system (7) respectively.

7. A method for circulating and filtering oil for testing a multifunctional retarder, based on the multifunctional retarder testing oil circulation and filtration system according to any one of claims 1-6, characterized in that, include: The whole machine control system (8) pumps the oil after the retarder test run to the oil storage tank (1) through the oil return system (5). The oil is filtered by the filter material filtration system (2) and the centrifugal filtration system (3). The oil temperature control system (6) controls the temperature of the filtered oil. The oil filling system (4) adds the filtered oil into the retarder. At the same time as adding oil, the oil particle size detection system (7) detects the oil particle size of the filtered oil.

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