Performance testing device for gas-liquid cyclone

Abstract

The invention provides a gas-liquid cyclone performance testing device which comprises a rack, an air compressor, a gear pump motor, a gear pump, a gas-liquid cyclone and a hydraulic valve block, the gear pump motor is connected with the gear pump through a coupler, and an oil suction port of the gear pump is communicated with an oil suction port in an oil tank; an oil outlet of the gear pump is communicated with a one-way valve on the hydraulic valve block, an air outlet of the air compressor is communicated with an air inlet of the oil tank, the oil tank is arranged on the middle layer of the machine frame, the gas-liquid cyclone and the hydraulic valve block are arranged on the upper layer of the machine frame, and an overflow valve, the one-way valve and a plurality of stop valves are arranged on the hydraulic valve block. And the one-way valve and the plurality of stop valves are respectively communicated with the oil tank and the gas-liquid cyclone through pipelines. The degassing effect of the gas-liquid cyclone and the degassing effect of a traditional oil return filter can be compared, and meanwhile various properties of the target gas-liquid cyclone can be analyzed and tested.

Description

Technical Field

[0001] The invention relates to the technical field of gas-liquid cyclone performance testing, and in particular to a gas-liquid cyclone performance testing device. Background Art

[0002] Hydraulic transmission, characterized by its high power-to-weight ratio, flexible response, and strong stability, has been widely used in heavy machinery. Hydraulic systems play a vital role in production operations, transportation, and even national defense technology. The working medium of hydraulic systems is hydraulic oil, which performs cooling, cleaning, and lubricating functions. The quality of the hydraulic oil directly impacts system performance. Years of statistical analysis indicate that hydraulic oil contamination accounts for 70% to 80% of system failures. Among hydraulic oil contaminants, mixed gas impurities are particularly difficult to treat. Hydraulic system oil typically contains 6% to 12% dissolved gas by volume, and traditional filters are unable to effectively treat these gases. The presence of dissolved gas in pipelines reduces the oil's bulk elastic modulus, leading to hydraulic cylinder creep, pipeline vibration and noise, and cavitation in components such as gear pumps. This increases oxidation, darkening the oil and degrading its quality. Localized high temperatures can cause combustion and explosion, resulting in significant losses and casualties. Gas-liquid cyclone separators, which separate substances of varying densities through intense cyclonic flow, are environmentally friendly and efficient. Their development and use may offer a new solution for treating oil contamination.

[0003] The comprehensive performance research of gas-liquid cyclones involves multiple aspects, including structural optimization to reduce pressure drop and improve separation efficiency, thereby reducing internal flow field losses and enhancing gas-liquid separation; using particle image tracing technology to observe the internal flow field to reveal the kinematic characteristics of the cyclone flow field and the distribution of secondary flows; and highlighting the technical advantages of cyclone separation by comparing the degassing effects of gas-liquid cyclones with traditional filtration methods. However, existing cyclone research experiments are relatively scattered, and a single test bench cannot meet the needs of multiple experiments at the same time. To this end, this study designed an experimental device for comprehensive performance testing of gas-liquid cyclones, aiming to achieve integrated testing of multiple experimental functions. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a gas-liquid cyclone performance testing device. By using a pressure sensor to measure the pressure at the inlet, outlet and short-circuit flow occurrence area of ​​the gas-liquid cyclone respectively, the degassing effect of the gas-liquid cyclone and the traditional oil return filter can be intuitively compared. At the same time, the pressure loss and separation efficiency of the target gas-liquid cyclone can be analyzed, the image grayscale processing of the gas-liquid oil at the inlet and outlet of the cyclone and the particle image velocimetry experiment can be carried out to observe the internal flow field movement state of the gas-liquid cyclone when it is working. This can not only reduce the experimental cost, but also improve the experimental efficiency. It has the advantages of simple structure, strong operability and high practicality.

[0005] The present invention provides a gas-liquid cyclone performance test device, which includes a frame, an air compressor, a gear pump motor, a gear pump, a gas-liquid cyclone and a hydraulic valve block. The lower layer of the frame is provided with an air compressor, a gear pump motor and a gear pump, and the middle layer of the frame is provided with an oil tank. The output shaft of the gear pump motor is connected to the pump shaft of the gear pump. The oil suction port of the gear pump is connected to the oil suction port on the oil tank through a first pipeline. The oil outlet of the gear pump is connected to the one-way valve on the hydraulic valve block through a second pipeline. The air outlet of the air compressor is connected to the air inlet on the oil tank through a first air path. The air compressor simulates the working condition of the oil in the oil tank being contaminated by air by introducing bubbles into the oil; the gas-liquid cyclone is arranged at the first end of the upper layer of the frame, the hydraulic valve block is arranged at the second end of the upper layer of the frame, and the hydraulic valve block is provided with a relief valve, a one-way valve and a Valve and the first stop valve, the second stop valve, the third stop valve and the fourth stop valve, the fourth stop valve discharges oil from the twelfth oil port on the hydraulic valve block into the flowmeter, the flowmeter is connected to the inlet on the gas-liquid cyclone through the third pipeline, the second stop valve discharges oil from the fourteenth oil port on the hydraulic valve block through the fourth pipeline and is connected to the third pipeline, the first stop valve is connected from the tenth oil port on the hydraulic valve block to the third oil inlet on the oil tank through the fifth pipeline, the third stop valve is connected from the hydraulic valve block to the return oil filter through the sixth pipeline, the eighth oil port on the hydraulic valve block is connected to the sixth oil inlet on the oil tank through the seventh pipeline, the outlet of the gas-liquid cyclone is connected to the first oil inlet on the oil tank through the eighth pipeline, and the overflow port of the gas-liquid cyclone is connected to the fifth oil inlet on the oil tank through the ninth pipeline.

[0006] Furthermore, the oil tank is sequentially arranged into a first oil tank, a second oil tank, a third oil tank and a fourth oil tank which are interconnected through partitions. The first end faces of the first oil tank, the second oil tank, the third oil tank and the fourth oil tank are all provided with peep windows. The first oil tank, the second oil tank, the third oil tank and the fourth oil tank respectively collect the oil processed by the gas-liquid cyclone, the oil processed by the return oil filter, the oil after flowing through the pipeline and the overflow oil of the gas-liquid cyclone.

[0007] Preferably, an oil drain valve is provided at the bottom of the oil tank, an oil suction port is provided on the side of the fourth oil tank, an air inlet is provided on one side of the oil suction port, the first oil inlet is located above the first oil tank, the second oil inlet is located above the second oil tank, a return oil filter is provided on the second oil inlet, the third oil inlet and the fourth oil inlet are both located above the third oil tank, an air filter is provided on the fourth oil inlet, and the fifth oil inlet and the sixth oil inlet are both located above the fourth oil tank.

[0008] Furthermore, the hydraulic valve block is provided with a plurality of main oil circuits, including a first oil circuit, a second oil circuit, a third oil circuit, a fourth oil circuit, a fifth oil circuit and a sixth oil circuit. The first end of the first oil circuit is connected to the first oil port, the second end of the first oil circuit is connected to the first end of the second oil circuit, the second end of the second oil circuit is connected to the second oil port, and the middle part of the first oil circuit is connected to the third oil circuit, the fourth oil circuit, the fifth oil circuit and the sixth oil circuit in sequence. The first end of the third oil circuit is connected to the third oil port, the first end of the fourth oil circuit is connected to the fourth oil port, the first end of the fifth oil circuit is connected to the fifth oil port, and the first end of the sixth oil circuit is connected to the sixth oil port.

[0009] Furthermore, the hydraulic valve block is provided with a plurality of auxiliary oil circuits, including a seventh oil circuit, an eighth oil circuit, a ninth oil circuit, a tenth oil circuit and an eleventh oil circuit. The first end of the seventh oil circuit is connected to the seventh oil port, the second end of the seventh oil circuit is connected to the eighth oil port, the first end of the eighth oil circuit is connected to the ninth oil port, the second end of the eighth oil circuit is connected to the tenth oil port, the first end of the ninth oil circuit is connected to the eleventh oil port, the second end of the ninth oil circuit is connected to the twelfth oil port, the first end of the tenth oil circuit is connected to the thirteenth oil port, the second end of the tenth oil circuit is connected to the fourteenth oil port, the first end of the eleventh oil circuit is connected to the fifteenth oil port, and the second end of the eleventh oil circuit is connected to the sixteenth oil port.

[0010] Preferably, the oil port on the overflow valve is respectively connected to the third oil port and the seventh oil port on the hydraulic valve block, the oil port on the one-way valve is respectively connected to the first oil port on the hydraulic valve block, the oil port on the first stop valve is respectively connected to the fourth oil port and the ninth oil port on the hydraulic valve block, the oil port on the second stop valve is respectively connected to the second oil port and the thirteenth oil port on the hydraulic valve block, the oil port on the third stop valve is respectively connected to the fifth oil port and the eleventh oil port on the hydraulic valve block, and the oil port on the fourth stop valve is respectively connected to the fourth oil port and the sixteenth oil port on the hydraulic valve block.

[0011] Preferably, the gas-liquid cyclone is provided with an inlet, a cyclone chamber, a cone section and an underflow pipe, and is fixed to the base by a connecting piece. An overflow port is provided on the top of the inlet, an inlet is provided on the first side of the inlet, an outlet is provided on the first side of the underflow pipe, a first pressure sensor and a second pressure sensor are respectively provided on the second side and the third side of the inlet, and a third pressure sensor is provided on the second side of the underflow pipe.

[0012] Preferably, a movable platform is further provided on the upper layer of the frame, and the movable platform includes a first guide rail, a first slider, a second guide rail, a second slider and a fixed plate. The first guide rail is symmetrically arranged at both ends of the upper layer of the frame, and a first slider is provided at both ends of the second guide rail. The first slider is slidably arranged on the first guide rail, and the fixed plate is slidably arranged on the second guide rail through the second slider. The fixed plate is also provided with a particle image velocimeter for observing the flow state of tracer particles in the internal flow field of the gas-liquid cyclone.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The gas-liquid cyclone performance testing device provided by the present invention divides the interior of the oil tank into multiple interconnected oil tanks in sequence through partitions. The multiple oil tanks can respectively collect the oil processed by the gas-liquid cyclone, the oil processed by the return oil filter, the oil after flowing through the pipeline, and the overflow oil of the gas-liquid cyclone. The gas content of the gas-liquid cyclone, the return oil filter, the system pipeline, and the inhaled oil can be observed through the peep window on the oil tank, which is conducive to directly comparing the removal effect of the gas-liquid cyclone on oil impurities compared with the return oil filter.

[0014] 2. The gas-liquid cyclone performance testing device provided by the present invention can realize the functions of comparing the degassing effect of the gas-liquid cyclone and the return oil filter, measuring the pressure loss of the gas-liquid cyclone, analyzing the gas content of the oil through image grayscale processing, and conducting PIV particle image velocimetry experimental observation. It is conducive to realizing the multifunctionality of the hydraulic system test bench and has guiding significance for the structural optimization analysis of the gas-liquid cyclone. It can not only reduce the complexity of experimental operation, but also improve experimental efficiency and practicality.

[0015] 3. The gas-liquid cyclone performance testing device provided by the present invention adopts a split design for the gas-liquid cyclone, which can be used to measure the performance of gas-liquid cyclones with different flow rates and structures, quickly compare and analyze the effects of different gas-liquid cyclone structural parameters on pressure loss and separation efficiency, and more conveniently measure the comprehensive performance of various gas-liquid cyclones, thereby improving experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall performance test device of the gas-liquid cyclone of the present invention; Figure 2 This is a front view of the gas-liquid cyclone performance testing device of the present invention; Figure 3 Schematic diagram of the structure of the oil tank in the gas-liquid cyclone performance testing device of the present invention; Figure 4 Schematic diagram of the structure of the hydraulic valve block in the gas-liquid cyclone performance testing device of the present invention; Figure 5 Schematic diagram of the structure of the valve body in the hydraulic valve block of the present invention; Figure 6is a cross-sectional view of a valve body in a hydraulic valve block of the present invention; Figure 7 Schematic diagram of the structure of the gas-liquid cyclone in the gas-liquid cyclone performance testing device of the present invention; Figure 8 This is a hydraulic principle diagram of the gas-liquid cyclone performance testing device of the present invention.

[0017] Main reference numerals: Frame 1; pneumatic two-way joint 100; stop valve 101; throttle valve 102; air compressor 2; first air circuit 201; gear pump motor 3; gear pump 4; control cabinet 5; hydraulic valve block 6; relief valve 61; check valve 62; first stop valve 63; second stop valve 64; third stop valve 65; fourth stop valve 66; first oil port 6011; second oil port 6012; third oil port 6013; fourth oil port 6014; fifth oil port 6015; sixth oil port 6016; seventh oil port 6017; eighth oil port Oil port 6018; ninth oil port 6019; tenth oil port 60110; eleventh oil port 60111; twelfth oil port 60112; thirteenth oil port 60113; fourteenth oil port 60114; fifteenth oil port 60115; sixteenth oil port 60116; first oil passage 6021; second oil passage 6022; third oil passage 6023; fourth oil passage 6024; fifth oil passage 6025; sixth oil passage 6026; seventh oil passage 6027; eighth oil passage 6028; ninth oil passage 6029; 10th oil circuit 60210; 11th oil circuit 60211; oil tank 7; first oil tank 71; second oil tank 72; third oil tank 73; fourth oil tank 74; peep window 75; oil suction port 701; air inlet 702; oil drain valve 703; first oil inlet 704; second oil inlet 705; third oil inlet 706; fourth oil inlet 707; fifth oil inlet 708; sixth oil inlet 709; gas-liquid cyclone 8; inlet 801; cyclone cavity 802; cone section 803; underflow pipe 804; base 80 5; overflow port 806; inlet 807; outlet 808; first pressure sensor 809; second pressure sensor 810; third pressure sensor 811; flow meter 9; first pipeline 901; second pipeline 902; third pipeline 903; fourth pipeline 904; fifth pipeline 905; sixth pipeline 906; seventh pipeline 907; eighth pipeline 908; ninth pipeline 909; return oil filter 10; air filter 11; first guide rail 12; second guide rail 13; fixing plate 14; first slider 15. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0019] The gas-liquid cyclone performance test device of the present invention is as follows: Figure 1 and Figure 2As shown, it includes a frame 1, an air compressor 2, a gear pump motor 3, a gear pump 4, a gas-liquid cyclone 8, and a hydraulic valve block 6. The lower layer of the frame 1 is equipped with the air compressor 2, the gear pump motor 3, and the gear pump 4. The output shaft of the gear pump motor 3 is connected to the pump shaft of the gear pump 4 via a coupling. The oil suction port of the gear pump 4 is connected to the oil suction port 701 on the oil tank 7 via a first pipeline 901. The oil outlet of the gear pump 4 is connected to the one-way valve 62 on the hydraulic valve block 6 via a second pipeline 902. The air outlet of the air compressor 2 is connected to the air inlet 702 on the oil tank 7 via a first air path 201. The air compressor 2 introduces bubbles into the oil via a pneumatic coupler 100, a stop valve 101, and a throttle valve 102 to simulate the working condition of the oil in the oil tank 7 being contaminated by air. A control cabinet 5 for controlling the start and stop of the air compressor 2 and the gear pump motor 3 is also provided in the lower layer of the frame 1.

[0020] like Figure 1 and Figure 3 As shown, an oil tank 7 is provided in the middle layer of the frame 1. The interior of the oil tank 7 is sequentially arranged from left to right through a partition into a first oil tank 71, a second oil tank 72, a third oil tank 73 and a fourth oil tank 74 which are interconnected. The first end surfaces of the first oil tank 71, the second oil tank 72, the third oil tank 73 and the fourth oil tank 74 are all provided with a peep window 75. The first oil tank 71, the second oil tank 72, the third oil tank 73 and the fourth oil tank 74 respectively collect the oil processed by the gas-liquid cyclone, the oil processed by the return oil filter, the oil extracted by the gear pump and the overflow oil of the gas-liquid cyclone.

[0021] like Figure 3 As shown, an oil drain valve 703 is provided at the bottom of the oil tank 7, and a plurality of oil ports are provided on the oil tank 7. The oil suction port 701 is provided on the side of the fourth oil tank 74, and an air inlet 702 is provided on one side of the oil suction port 701. The first oil inlet 704 is located above the first oil tank 71, the second oil inlet 705 is located above the second oil tank 72, and a return oil filter 10 is provided on the second oil inlet 705. The third oil inlet 706 and the fourth oil inlet 707 are both located above the third oil tank 73, and an air filter 11 is provided on the fourth oil inlet 707. The fifth oil inlet 708 and the sixth oil inlet 709 are both located above the fourth oil tank 74.

[0022] like Figure 1 and Figure 4As shown, the hydraulic valve block 6 is arranged at the second end of the upper layer of the frame 1, and the hydraulic valve block 6 is provided with a relief valve 61, a one-way valve 62, a first stop valve 63, a second stop valve 64, a third stop valve 65 and a fourth stop valve 66. The fourth stop valve 66 outputs oil from the twelfth oil port 60112 on the hydraulic valve block 6 to flow into the flow meter 9, and the flow meter 9 is connected to the inlet 807 on the gas-liquid cyclone 8 through the third pipeline 903. The second stop valve 64 outputs oil from the fourteenth oil port 60114 on the hydraulic valve block 6 to communicate with the third pipeline 903 through the fourth pipeline 904, and the first stop valve 63 outputs oil from the liquid The tenth oil port 60110 on the hydraulic valve block 6 is connected to the third oil inlet 706 on the oil tank 7 through the fifth pipeline 905. The third shut-off valve 65 is connected to the return oil filter 10 through the sixth pipeline 906 on the hydraulic valve block 6. The eighth oil port 6018 on the hydraulic valve block 6 is connected to the sixth oil inlet 709 on the oil tank 7 through the seventh pipeline 907. The outlet 808 of the gas-liquid cyclone 8 is connected to the first oil inlet 704 on the oil tank 7 through the eighth pipeline 908. The overflow port 806 of the gas-liquid cyclone 8 is connected to the fifth oil inlet 708 on the oil tank through the ninth pipeline 909.

[0023] like Figures 4 to 6As shown, the hydraulic valve block 6 is in a rectangular parallelepiped shape, and a plurality of main oil circuits are provided in the hydraulic valve block 6, the plurality of main oil circuits including a first oil circuit 6021, a second oil circuit 6022, a third oil circuit 6023, a fourth oil circuit 6024, a fifth oil circuit 6025 and a sixth oil circuit 6026. The first end of the first oil circuit 6021 is connected to the first oil port 6011, and the second end of the first oil circuit 6021 is connected to the first end of the second oil circuit 6022, and the second end of the second oil circuit 6022 is connected to the second oil port 6011. The first oil circuit 6021 is connected to the third oil circuit 6023, the fourth oil circuit 6024, the fifth oil circuit 6025 and the sixth oil circuit 6026 in sequence, and the first end of the third oil circuit 6023 is connected to the third oil port 6013, the first end of the fourth oil circuit 6024 is connected to the fourth oil port 6014, and the first end of the fifth oil circuit 6025 is connected to the fifth oil port 6015, and the first end of the sixth oil circuit 6026 is connected to the sixth oil port 6016. The hydraulic valve block 6 is provided with a plurality of auxiliary oil circuits, including a seventh oil circuit 6027, an eighth oil circuit 6028, a ninth oil circuit 6029, a tenth oil circuit 60210, and an eleventh oil circuit 60211. The first end of the seventh oil circuit 6027 is connected to the seventh oil port 6017, and the second end of the seventh oil circuit 6027 is connected to the eighth oil port 6018. The first end of the eighth oil circuit 6028 is connected to the ninth oil port 6019, and the second end of the eighth oil circuit 6028 is connected to the tenth oil port 60110. The first end of the ninth oil circuit 6029 is connected with the eleventh oil port 60111, and the second end of the ninth oil circuit 6029 is connected with the twelfth oil port 60112, the first end of the tenth oil circuit 60210 is connected with the thirteenth oil port 60113, and the second end of the tenth oil circuit 60210 is connected with the fourteenth oil port 60114, the first end of the eleventh oil circuit 60211 is connected with the fifteenth oil port 60115, and the second end of the eleventh oil circuit 60211 is connected with the sixteenth oil port 60116.

[0024] In a preferred embodiment, the oil port on the overflow valve 61 is respectively connected to the third oil port 6013 and the seventh oil port 6017 on the hydraulic valve block 6, and the oil port on the one-way valve 62 is respectively connected to the first oil port 6011 on the hydraulic valve block 6, the oil port on the first stop valve 63 is respectively connected to the fourth oil port 6014 and the ninth oil port 6019 on the hydraulic valve block 6, and the oil port on the second stop valve 64 is respectively connected to the second oil port 6012 and the thirteenth oil port 60113 on the hydraulic valve block 6, the oil port on the third stop valve 65 is respectively connected to the fifth oil port 6015 and the eleventh oil port 60111 on the hydraulic valve block 6, and the oil port on the fourth stop valve 66 is respectively connected to the fourth oil port 6014 and the sixteenth oil port 60116 on the hydraulic valve block 6.

[0025] like Figure 1 and Figure 7 As shown, the gas-liquid cyclone 8 is arranged at the first end of the upper layer of the frame 1. The gas-liquid cyclone 8 is composed of an inlet portion 801, a cyclone chamber portion 802, a cone section portion 803 and an underflow pipe portion 804 from top to bottom, and is fixed to the base 805 through a connecting piece. An overflow port 806 is provided at the top of the inlet portion 801, and an inlet 807 is provided at the first side of the inlet portion 801, an outlet 808 is provided at the first side of the underflow pipe portion 804, and a first pressure sensor 809 and a second pressure sensor 810 are provided at the second and third sides of the inlet portion 801, respectively, and a third pressure sensor 811 is provided at the second side of the underflow pipe portion 804.

[0026] In a preferred embodiment, the inlet 801, swirl chamber 802, cone section 803, and underflow tube 804 of the gas-liquid cyclone 8 are bolted to the base 805. This structure facilitates quick replacement of components to modify the internal structure and allows testing of gas-liquid cyclones with various structural parameters. Annular sealing grooves are designed at the junctions between the inlet 801, swirl chamber 802, cone section 803, and underflow tube 804, each requiring the installation of an annular sealing ring.

[0027] The working method of the gas-liquid cyclone is as follows: the gas-containing oil first flows into the annular cavity from the inlet 807. After the oil fills the annular cavity, it enters the six straight-cut inlets on the upper part of the inlet 801, and the oil swirls in the swirl cavity. An air column is formed in the center, and the gas with lower density overflows from the upper overflow port 806. The swirl-treated oil flows out from the outlet 808. In order to more accurately measure the pressure loss of the gas-liquid cyclone, a first pressure sensor 809 and a second pressure sensor 810 are respectively provided on the second and third sides of the inlet 801, and a third pressure sensor 811 is provided on the second side of the bottom flow pipe 804. In order to better observe the gas content before and after the gas-containing oil swirl, the flow channels of the inlet and outlet are extended. In order to prevent the block from being misaligned during operation, a positioning block is provided inside the block. When installing, the protrusion can be embedded in the depression.

[0028] In a preferred embodiment, the upper layer of the frame 1 is also provided with a movable platform, which includes a first guide rail 12, a first slider 15, a second guide rail 13, a second slider, and a fixed plate 14. The first guide rail 12 is symmetrically arranged at both ends of the upper layer of the frame 1, and the first slider 15 is provided at both ends of the second guide rail 13. The first slider 15 slides on the first guide rail 12, and the fixed plate 14 slides on the second guide rail 13 via the second slider. The fixed plate 14 is also provided with a particle image velocimetry device for observing the flow state of tracer particles in the internal flow field of the gas-liquid cyclone. At the same time, when conducting PIV particle image velocimetry experiments, the laser lamp head is fixed to the movable platform, and the lifting frame is adjusted to an appropriate height to facilitate adjustment in various situations. This can meet the needs of shooting in multiple positions and multiple focal lengths, adapting to various gas-liquid cyclone structural performance tests.

[0029] The present invention also provides a method for testing the performance of a gas-liquid cyclone. Figures 1 to 8 As shown, the specific steps include the following: S1. Safety check: At the beginning of the relevant experiment, first ensure that the connection parts are tightened, the Forma wheel under the frame 1 is fixed, the overflow valve 61, the one-way valve 62 and multiple stop valves are set to fully open, the oil is free of impurities and leakage, and the wires are correctly connected and in good contact. After confirming that everything is correct, start the experimental table.

[0030] S2. Device Inspection: When conducting relevant experiments, first turn on air compressor 2, adjust the intake pressure, and pump gas into the oil in fourth tank 74 of oil tank 7. After the bubbles are evenly distributed in the oil in fourth tank 74, turn on gear pump motor 3 and use the frequency converter to adjust the motor speed. At this point, it is found that the first tank 71, the second tank 72, and the third tank 73 from left to right are flowing oil normally. Observe the system for oil leaks. If there is oil leakage, tighten the pipeline. If there is no oil leakage, close the stop valve of the pipeline directly connected to the gas-liquid cyclone 8.

[0031] S3. Steady Flow Measurement: Observe the flowmeter 9 in the oil bypass and adjust the frequency converter to ensure that the flow reaches the rated flow rate of the gas-liquid cyclone 8. If the flow rate of the gas-liquid cyclone 8 still does not meet the standard when the gear pump motor 3 speed is too high, consider appropriately closing the third shut-off valve 65 on the oil return line from the second oil tank 72 and the first shut-off valve 63 on the oil return line from the third oil tank 73 to increase the flow rate in the oil circuit of the gas-liquid cyclone 8. After the flowmeter 9 reading reaches the rated flow rate of the gas-liquid cyclone 8, first open the first shut-off valve 63 and the second shut-off valve 64 in the pipeline directly connected to the gas-liquid cyclone 8, and then close the first shut-off valve 63 connected to the flowmeter 9. This ensures that the system pressure is stable and the gas-liquid cyclone 8 continues to operate at the rated flow rate. After the vortex flow in the gas-liquid cyclone 8 stabilizes, observe and record the pressure sensor reading to obtain the pressure values ​​at the inlet, outlet, and short-circuit flow formation area of ​​the gas-liquid cyclone 8.

[0032] S4. Multifunctional measurement: The gas content of the gas-liquid cyclone 8, the return oil filter 10, the system pipeline, and the inhaled oil can be observed through the peephole 75. The expected effect is that a very small amount of bubbles will appear in the first oil tank 71, a certain amount of bubbles will appear in the second oil tank 72, and a large amount of bubbles will appear in the third oil tank 73, which is similar to the fourth oil tank 4. When the swirl of the gas-liquid cyclone 8 is stable, the oil-liquid gas content can be observed from the side of the gas-liquid cyclone 8. The image grayscale processing can also be performed to conduct a more accurate gas content analysis to obtain a more accurate cyclone separation efficiency. If there is a need to test other structural parameters and operating parameters of the gas-liquid cyclone, the acrylic block can be replaced and quickly installed for experimentation to improve experimental efficiency. When a PIV particle image velocimetry experiment is required, the laser lamp head is fixed on the linear slide rail and the lifting frame is adjusted to an appropriate height to facilitate adjustment in various situations, thus realizing the multifunctional integration of gas-liquid cyclone testing.

[0033] The gas-liquid cyclone performance test device provided by the present invention divides the interior of the oil tank into multiple interconnected oil tanks through partitions. The multiple oil tanks can respectively collect the oil processed by the gas-liquid cyclone, the oil processed by the return oil filter, the oil after flowing through the pipeline, and the oil overflowed by the gas-liquid cyclone. The gas content of the gas-liquid cyclone, the return oil filter, the system pipeline, and the inhaled oil can be observed through the peep window on the oil tank, which is conducive to directly comparing the removal effect of the gas-liquid cyclone on impurities in the oil with that of the return oil filter. At the same time, it can realize the functions of comparing the degassing effect of the gas-liquid cyclone and the return oil filter, measuring the pressure loss of the gas-liquid cyclone, analyzing the gas content of the processed oil by grayscale processing, and conducting PIV particle image velocimetry experimental observation, which is conducive to realizing the multifunctionality of the hydraulic system test bench, has guiding significance for the structural optimization analysis of the gas-liquid cyclone, can improve experimental efficiency, and has the advantages of simple structure, strong operability, and high practicality. In addition, the gas-liquid cyclone adopts a split design, which can be used to measure the performance of gas-liquid cyclones with different flow rates and structures, quickly compare and analyze the impact of different gas-liquid cyclone structural parameters on pressure loss and separation efficiency, and more conveniently measure the comprehensive performance of various gas-liquid cyclones, thereby improving experimental efficiency.

[0034] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A gas-liquid cyclone performance testing device, characterized by: It includes a frame, an air compressor, a gear pump motor, a gear pump, a gas-liquid cyclone and a hydraulic valve block. The lower layer of the frame is equipped with an air compressor, a gear pump motor and a gear pump, and the middle layer of the frame is equipped with an oil tank. The output shaft of the gear pump motor is connected to the pump shaft of the gear pump. The oil suction port of the gear pump is connected to the oil suction port on the oil tank through a first pipeline. The oil outlet of the gear pump is connected to the one-way valve on the hydraulic valve block through a second pipeline. The air outlet of the air compressor is connected to the air inlet on the oil tank through a first air path. The air compressor simulates the working condition of the oil in the oil tank being contaminated by air by introducing bubbles into the oil. The gas-liquid cyclone is arranged at the first end of the upper layer of the frame, and the hydraulic valve block is arranged at the second end of the upper layer of the frame. The hydraulic valve block is provided with a relief valve, a one-way valve, and a first stop valve, a second stop valve, a third stop valve and a fourth stop valve. The fourth stop valve discharges oil from the twelfth oil port on the hydraulic valve block into the flowmeter, and the flowmeter is connected to the inlet on the gas-liquid cyclone through the third pipeline. The second stop valve discharges oil from the fourteenth oil port on the hydraulic valve block and is connected to the third pipeline through the fourth pipeline. The first stop valve is connected from the tenth oil port on the hydraulic valve block to the third oil inlet on the oil tank through the fifth pipeline. The third stop valve is connected from the hydraulic valve block to the return oil filter through the sixth pipeline. The eighth oil port on the hydraulic valve block is connected to the sixth oil inlet on the oil tank through the seventh pipeline. The outlet of the gas-liquid cyclone is connected to the first oil inlet on the oil tank through the eighth pipeline, and the overflow port of the gas-liquid cyclone is connected to the fifth oil inlet on the oil tank through the ninth pipeline.

2. The gas-liquid cyclone performance testing device according to claim 1, characterized in that: The oil tank is sequentially arranged into a first oil tank, a second oil tank, a third oil tank and a fourth oil tank which are interconnected through a partition. The first end surfaces of the first oil tank, the second oil tank, the third oil tank and the fourth oil tank are all provided with a peep window. The first oil tank, the second oil tank, the third oil tank and the fourth oil tank respectively collect the oil processed by the gas-liquid cyclone, the oil processed by the return oil filter, the oil after flowing through the pipeline and the overflow oil of the gas-liquid cyclone.

3. The gas-liquid cyclone performance testing device according to claim 2, characterized in that: An oil drain valve is provided at the bottom of the oil tank, the oil suction port is provided on the side of the fourth oil tank, and an air inlet is provided on one side of the oil suction port. The first oil inlet is located above the first oil tank, the second oil inlet is located above the second oil tank, and a return oil filter is provided on the second oil inlet. The third oil inlet and the fourth oil inlet are both located above the third oil tank, and an air filter is provided on the fourth oil inlet. The fifth oil inlet and the sixth oil inlet are both located above the fourth oil tank.

4. The gas-liquid cyclone performance testing device according to claim 1, characterized in that: The hydraulic valve block is provided with a plurality of main oil circuits, which include a first oil circuit, a second oil circuit, a third oil circuit, a fourth oil circuit, a fifth oil circuit and a sixth oil circuit. The first end of the first oil circuit is connected to the first oil port, and the second end of the first oil circuit is connected to the first end of the second oil circuit, and the second end of the second oil circuit is connected to the second oil port. The middle part of the first oil circuit is connected to the third oil circuit, the fourth oil circuit, the fifth oil circuit and the sixth oil circuit in sequence, and the first end of the third oil circuit is connected to the third oil port, the first end of the fourth oil circuit is connected to the fourth oil port, and the first end of the fifth oil circuit is connected to the fifth oil port, and the first end of the sixth oil circuit is connected to the sixth oil port.

5. The gas-liquid cyclone performance testing device according to claim 1, characterized in that: The hydraulic valve block is provided with multiple auxiliary oil circuits, including a seventh oil circuit, an eighth oil circuit, a ninth oil circuit, a tenth oil circuit and an eleventh oil circuit. The first end of the seventh oil circuit is connected to the seventh oil port, and the second end of the seventh oil circuit is connected to the eighth oil port, the first end of the eighth oil circuit is connected to the ninth oil port, and the second end of the eighth oil circuit is connected to the tenth oil port, the first end of the ninth oil circuit is connected to the eleventh oil port, and the second end of the ninth oil circuit is connected to the twelfth oil port, the first end of the tenth oil circuit is connected to the thirteenth oil port, and the second end of the tenth oil circuit is connected to the fourteenth oil port, the first end of the eleventh oil circuit is connected to the fifteenth oil port, and the second end of the eleventh oil circuit is connected to the sixteenth oil port.

6. The gas-liquid cyclone performance testing device according to claim 4 or 5, characterized in that: The oil ports on the overflow valve are respectively connected to the third oil port and the seventh oil port on the hydraulic valve block, the oil port on the one-way valve is connected to the first oil port on the hydraulic valve block, the oil ports on the first stop valve are respectively connected to the fourth oil port and the ninth oil port on the hydraulic valve block, the oil ports on the second stop valve are respectively connected to the second oil port and the thirteenth oil port on the hydraulic valve block, the oil ports on the third stop valve are respectively connected to the fifth oil port and the eleventh oil port on the hydraulic valve block, and the oil ports on the fourth stop valve are respectively connected to the fourth oil port and the sixteenth oil port on the hydraulic valve block.

7. The gas-liquid cyclone performance testing device according to claim 1, characterized in that: The gas-liquid cyclone is provided with an inlet, a swirl chamber, a cone section and an underflow pipe, and is fixed to the base by a connecting piece. An overflow port is provided on the top of the inlet, an inlet is provided on the first side of the inlet, an outlet is provided on the first side of the underflow pipe, a first pressure sensor and a second pressure sensor are provided on the second and third sides of the inlet respectively, and a third pressure sensor is provided on the second side of the underflow pipe.

8. The gas-liquid cyclone performance testing device according to claim 1, characterized in that: The upper layer of the frame is also provided with a movable platform, which includes a first guide rail, a first slider, a second guide rail, a second slider and a fixed plate. The first guide rail is symmetrically arranged at both ends of the upper layer of the frame, and the two ends of the second guide rail are provided with a first slider. The first slider is slidably arranged on the first guide rail, and the fixed plate is slidably arranged on the second guide rail through the second slider. The fixed plate is also provided with a particle image velocimeter for observing the flow state of tracer particles in the internal flow field of the gas-liquid cyclone.

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