An integrated hydraulic system

Abstract

The present invention discloses an integrated hydraulic system, which is applied to the technical field of integrated hydraulic systems. It includes a connecting frame, an oil tank, two groups of motors, two groups of hydraulic pumps, a reversing valve, a filtering mechanism, an impurity weighing module and a time module; the filtering mechanism includes a housing, a housing cover, an oil inlet end, an oil outlet end, a magnetic core, a first filter element, a first fan wheel and a second fan wheel; a first pressure sensor is arranged on the oil inlet end of the filtering mechanism, a second pressure sensor is arranged on the oil outlet end of the filtering mechanism, and the first pressure sensor and the second pressure sensor are connected with a collection and analysis module; the collection and analysis module is used for analyzing the relationship between the pressure difference and the impurity amount of the hydraulic oil before and after being filtered by the filtering mechanism; the impurity weighing module is used for weighing the weight of the metal impurities adsorbed on the magnetic core when replacing the first filter element in the filtering mechanism. The present invention can ensure the long-term normal operation of the hydraulic system.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated hydraulic systems, and particularly to an integrated hydraulic system. Background Art

[0002] At present, most construction machinery operates through a hydraulic system. The hydraulic system mainly includes a hydraulic pump, a hydraulic valve, a hydraulic cylinder, a hydraulic motor, hydraulic oil, etc. Among them, the hydraulic oil is stored in a hydraulic oil tank and serves as a working medium for functions such as energy transfer and lubrication. The hydraulic oil is sucked out of the hydraulic oil tank by a hydraulic oil pump, pressurized, and then transported to an actuator such as a hydraulic cylinder through components such as a hydraulic pipeline and a hydraulic valve. The hydraulic oil after doing work returns to the hydraulic oil tank through a return oil pipeline to work in a cycle.

[0003] Most hydraulic failures are due to poor cleanliness of the hydraulic oil. Therefore, a filter is usually used to filter the hydraulic oil to improve the cleanliness of the hydraulic oil sucked by the pump. Due to the different working states of the integrated hydraulic system, as the working time of the filter increases, the actual service life of the filter element is also different. If the filter element is replaced at the time interval specified by the manufacturer, such as: replacing it once every 500h or once every 1000h, etc., when there are more and more impurities on the surface of the filter, the pores of the filter element are blocked, the pressure difference increases, and the filtering effect is gradually lost, it cannot be detected in time. If the pressure difference reaches a certain value, it will cause the amount of hydraulic oil in the hydraulic system to be insufficient to support the normal operation of the entire hydraulic system, and at this time, replacing the filter element of the filter will also affect the normal production progress.

[0004] Therefore, it is necessary to provide an integrated hydraulic system to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated hydraulic system that can ensure the long-term normal operation of the hydraulic system to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solution: An integrated hydraulic system includes a connecting frame, a fuel tank, two groups of motors, two groups of hydraulic pumps, a reversing valve, a filtering mechanism, an impurity weighing module, and a time module;

[0007] The filtering mechanism includes a housing, a housing cover, an oil inlet end, an oil outlet end, a magnetic core, a first filter element, a first fan wheel, and a second fan wheel;

[0008] A first pressure sensor is provided on the oil inlet end of the filtering mechanism, and a second pressure sensor is provided on the oil outlet end of the filtering mechanism. The first pressure sensor is used to detect the hydraulic oil pressure at the oil inlet end of the filtering mechanism, and the second pressure sensor is used to detect the hydraulic oil pressure at the oil outlet end after being filtered by the filtering mechanism. The first pressure sensor and the second pressure sensor are connected to a collection and analysis module;

[0009] The acquisition and analysis module is used to analyze the relationship between the pressure difference and the impurity quantity of the hydraulic oil before and after being filtered by the filtering mechanism;

[0010] The impurity weighing module is used to weigh the weight of the metal impurities adsorbed on the magnetic core when the filter element in the filtering mechanism is replaced;

[0011] The time module is used to record the usage time of the filtering mechanisms on two component paths. The impurity weighing module and the time module are signal-connected to the acquisition and analysis module.

[0012] According to the above technical solution, a box body is fixedly connected to the connecting frame. The fuel tank, two groups of motors, and two groups of hydraulic pumps are fixed inside the box body. The fuel tank is provided with an oil outlet pipeline 1 and a return oil pipeline. The hydraulic pump is provided with an oil inlet pipeline and an oil outlet pipeline 2. The oil inlet pipelines of the two groups of hydraulic pumps are connected to the oil outlet pipeline 1 of the fuel tank in a parallel manner. The motor is fixedly connected to the hydraulic pump; The housing and the housing cover are connected by bolts. The oil inlet end and the oil outlet end are respectively fixed on both sides of the housing; The reversing valve includes an oil inlet, two working oil ports, a return oil port, and a reversing oil port.

[0013] According to the above technical solution, the oil outlet pipeline 2 of the hydraulic pump is connected to the oil inlet end pipeline of the filtering mechanism. The oil outlet end of the filtering mechanism is connected to the oil inlet of the reversing valve by a pipeline. The two working oil ports of the reversing valve are respectively connected to the two oil cavities of the hydraulic cylinder by pipelines. The return oil port of the reversing valve is connected to the return oil pipeline of the fuel tank by a pipeline.

[0014] According to the above technical solution, the oil outlet pipeline 2 of the hydraulic pump is connected with two component paths by pipelines. The component paths are respectively a branch pipeline 1 and a branch pipeline 2. Valves are connected to the branch pipeline 1 and the branch pipeline 2. The other ends of the valves are successively connected with the filtering mechanism and the reversing valve. The two working oil ports of the two groups of reversing valves are respectively connected to the hydraulic cylinder.

[0015] According to the above technical solution, the magnetic core is arranged on the housing cover, and the first fan wheel and the second fan wheel are arranged inside the housing;

[0016] One side of the housing cover close to the housing is fixedly connected with a special-shaped limiting groove and a first limiting ring. The special-shaped limiting groove is arranged on the periphery of the first limiting ring. The magnetic core is arranged at the center of the first limiting ring. The magnetic core is clamped with the housing cover.

[0017] According to the above technical solution, a sliding plate is slidably connected inside the housing. A plurality of springs are fixedly connected to one side of the sliding plate close to the housing cover. The other ends of the springs are fixedly connected to the inside of the housing;

[0018] One side of the skateboard close to the shell cover is fixedly connected with a retaining wall. The shape and size of the retaining wall match those of the special-shaped limiting groove. One side of the retaining wall close to the oil inlet end is slidably connected with a sleeve. The outer diameter of the sleeve matches the inner diameter of the pipeline at the oil inlet end. One side of the retaining wall close to the oil inlet end is fixedly connected with a limiting rod inside. Two sets of first limiting grooves are provided on one side of the skateboard close to the oil inlet end. A second limiting groove is provided on one side of the sleeve away from the oil inlet end. The shape, size, and position of the second limiting groove match those of the first limiting groove. A limiting block is arranged inside the first limiting groove and the second limiting groove. The limiting block is slidably connected with the skateboard and the sleeve. The limiting rod is located on one side of the first limiting groove away from the oil inlet end.

[0019] According to the above technical solution, a second limiting ring is fixedly connected to one side of the inside of the shell away from the special-shaped limiting groove. A third limiting ring is fixedly connected to one side of the skateboard close to the second limiting ring. The diameters of the second limiting ring and the third limiting ring match. The first filter element is arranged between the second limiting ring and the third limiting ring.

[0020] According to the above technical solution, the first fan wheel is connected to one side of the inside of the shell away from the special-shaped limiting groove by a bearing. A limiting frame is clamped at the center of the third limiting ring. The first fan wheel is connected to one side of the limiting frame close to the first fan wheel by a bearing. The second fan wheel is connected to one side of the limiting frame away from the first fan wheel by a bearing. The diameter of one side of the second fan wheel away from the limiting frame matches that of the first limiting ring.

[0021] According to the above technical solution, the center of the first fan wheel is hollow. A second filter element is fixedly connected to the central part of the second fan wheel. The filtration accuracy of the second filter element is greater than that of the first filter element. When the shell cover is completely connected to the shell, the magnetic core is located at the center of the second fan wheel, and the second filter element is located on the periphery of the magnetic core.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, by providing two sets of motors and hydraulic pumps connected in parallel, the operation of two sets of hydraulic cylinders can be realized, saving some devices in the hydraulic system and reducing the occupied space of the hydraulic system;

[0023] By providing two sets of filtering mechanisms on the control pipeline of a single hydraulic cylinder, on the basis of realizing the self-cleaning of the filtering mechanism, according to the actual use conditions of the hydraulic cylinder, the filtering mechanisms on different branches can be selected for filtering, reducing the application cost of the hydraulic system while ensuring that the hydraulic rod can operate normally, prolonging the service life of the filtering mechanism, and at the same time, by providing two sets of filtering mechanisms, the time occupied when replacing the first filter element in the hydraulic system can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a partial structural schematic diagram of the present invention;

[0027] Figure 3 is a schematic diagram of the pipeline connection of the overall mechanism of the present invention;

[0028] Figure 4 is a schematic diagram of the overall structure of the filtering mechanism of the present invention;

[0029] Figure 5 is an exploded schematic diagram of the overall structure of the filtering mechanism of the present invention;

[0030] Figure 6 is an exploded schematic diagram of a partial structure of the filtering mechanism of the present invention;

[0031] Figure 7 is an exploded schematic diagram of the end part of the filtering mechanism of the present invention;

[0032] Figure 8 is a sectional schematic diagram of a partial structure of the filtering mechanism of the present invention;

[0033] Figure 9 is a pipeline schematic diagram of a partial structure of the present invention with two groups of filtering mechanisms in parallel;

[0034] In the figure: 1, connecting frame; 2, box body; 3, fuel tank; 3a, first oil outlet pipeline; 3b, oil return pipeline; 4, motor; 5, hydraulic pump; 5a, oil inlet pipeline; 5b, second oil outlet pipeline; 5c, first branch pipeline; 5d, second branch pipeline; 6, reversing valve; 6a, oil inlet; 6b, working oil port; 6c, oil return port; 7, filtering mechanism; 8, hydraulic cylinder; 9, valve;

[0035] 71, housing; 72, housing cover; 73, oil inlet end; 731, first pressure sensor; 74, oil outlet end; 741, second pressure sensor; 75, special-shaped limiting groove; 76, first limiting ring; 77, magnetic core; 78, sliding plate; 79, spring; 710, enclosure; 711, sleeve; 712, limiting block; 713, first limiting groove; 714, second limiting ring; 715, first filter element; 716, third limiting ring; 717, first fan wheel; 718, limiting frame; 719, second fan wheel; 720, second filter element. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1:

[0038] Please refer to Figures 1-4 As shown in the figure, the present invention provides a technical solution: an integrated hydraulic system, including a connecting frame 1, a fuel tank 3, two groups of motors 4, two groups of hydraulic pumps 5, a reversing valve 6 and a filtering mechanism 7. A box body 2 is fixedly connected to the connecting frame 1. The fuel tank 3, two groups of motors 4 and two groups of hydraulic pumps 5 are fixed inside the box body 2. The fuel tank 3 is provided with an oil outlet pipeline 3a and an oil return pipeline 3b. The hydraulic pump 5 is provided with an oil inlet pipeline 5a and an oil outlet pipeline 5b. The oil inlet pipelines 5a of the two groups of hydraulic pumps 5 are connected to the oil outlet pipeline 3a of the fuel tank 3 in parallel. The motor 4 is fixedly connected to the hydraulic pump 5. The motor 4 is used to drive the hydraulic pump 5 to operate for oil suction and oil pressure;

[0039] The filtering mechanism 7 includes a housing 71, a housing cover 72, an oil inlet end 73 and an oil outlet end 74. The housing 71 and the housing cover 72 are connected by bolts. The oil inlet end 73 and the oil outlet end 74 are respectively fixed on both sides of the housing 71. The oil outlet pipeline 5b of the hydraulic pump 5 is connected to the oil inlet end 73 of the filtering mechanism 7 through a pipeline. The reversing valve 6 includes an oil inlet 6a, two working oil ports 6b, an oil return port 6c and a reversing oil port. The oil outlet end 74 of the filtering mechanism 7 is connected to the oil inlet 6a of the reversing valve 6 through a pipeline. The two working oil ports 6b of the reversing valve 6 are respectively connected to the two oil chambers of the hydraulic cylinder 8 through pipelines. The oil return port 6c of the reversing valve 6 is connected to the oil return pipeline 3b of the fuel tank 3 through a pipeline.

[0040] Working principle: When the motor 4 starts, it drives the hydraulic pump 5 to suck and pressurize oil from the fuel tank 3. The hydraulic oil enters the filtering mechanism 7 through the oil outlet pipeline 5b. After being filtered by the filtering mechanism 7, it enters the reversing valve 6. The reversing valve 6 switches the oil circuit according to the control signal, sends the hydraulic oil into the corresponding oil chamber of the hydraulic cylinder 8 to push the piston to move. When the hydraulic cylinder 8 returns oil, it flows back to the fuel tank 3 through the reversing valve 6, completing a working cycle.

[0041] It should be noted that the structures of the fuel tank 3, two groups of motors 4, two groups of hydraulic pumps 5 and the reversing valve 6 and the connection methods adopted by the single-group fuel tank 3, motor 4, hydraulic pump 5, reversing valve 6 and filtering mechanism 7 are all prior arts, and will not be elaborated here.

[0042] In this embodiment, by connecting two groups of motors 4 and hydraulic pumps 5 in parallel in the integrated hydraulic system, the operation of two groups of hydraulic cylinders 8 can be realized simultaneously, saving some devices, reducing the occupied space of the hydraulic system and reducing the production cost at the same time.

[0043] Embodiment Two:

[0044] Please refer to Figures 5-8 Based on Embodiment One, the following structure is added: As shown in Figure 6As shown, the filtering mechanism 7 further includes a magnetic core 77, a first fan wheel 717 and a second fan wheel 719. The magnetic core 77 is arranged on the shell cover 72, and the first fan wheel 717 and the second fan wheel 719 are arranged inside the shell 71.

[0045] As Figure 5 shown, on the side of the shell cover 72 close to the shell 71, a special-shaped limiting groove 75 and a first limiting ring 76 are fixedly connected. The special-shaped limiting groove 75 is arranged on the periphery of the first limiting ring 76. The magnetic core 77 is arranged at the center of the first limiting ring 76. The magnetic core 77 is clamped with the shell cover 72. The magnetic core 77 is used to adsorb metal impurities in the filtering mechanism 7.

[0046] As Figures 6-8 shown, a sliding plate 78 is slidably connected inside the shell 71. On the side of the sliding plate 78 close to the shell cover 72, a plurality of springs 79 are fixedly connected. The other ends of the springs 79 are fixedly connected to the inside of the shell 71;

[0047] On the side of the sliding plate 78 close to the shell cover 72, a retaining wall 710 is fixedly connected. The shape and size of the retaining wall 710 match those of the special-shaped limiting groove 75. On the side of the retaining wall 710 close to the oil inlet end 73, a sleeve 711 is slidably connected. The outer diameter of the sleeve 711 matches the inner diameter of the pipeline of the oil inlet end 73. Inside the side of the retaining wall 710 close to the oil inlet end 73, a limiting rod is fixedly connected. On the side of the sliding plate 78 close to the oil inlet end 73, two groups of first limiting grooves 713 are opened. On the side of the sleeve 711 far from the oil inlet end 73, a second limiting groove is opened. The second limiting groove matches the shape, size and position of the first limiting groove 713. Inside the first limiting groove 713 and the second limiting groove, a limiting block 712 is arranged. The limiting block 712 is horizontally arranged in a Y shape. The limiting block 712 is slidably connected with the sliding plate 78 and the sleeve 711. The limiting rod is located on the side of the first limiting groove 713 far from the oil inlet end 73;

[0048] During actual operation, manually pull the limiting block 712 and pull the limiting block 712 out of the first limiting groove 713 and the second limiting groove, which can release the position restriction of the limiting block 712 on the sleeve 711. At the same time, it can also release the position restriction of the limiting rod on the limiting block 712, so that the sleeve 711 can move horizontally, facilitating the connection with the pipeline of the oil inlet end 73. On the contrary, insert the limiting block 712 into the second limiting groove and the first limiting groove 713, then the limiting rod can restrict the position of the limiting block 712, and the limiting block 712 can restrict the position of the sleeve 711;

[0049] As Figure 6 and Figure 8 shown, on the side of the inside of the shell 71 far from the special-shaped limiting groove 75, a second limiting ring 714 is fixedly connected. On the side of the sliding plate 78 close to the second limiting ring 714, a third limiting ring 716 is fixedly connected. The diameters of the second limiting ring 714 and the third limiting ring 716 match. The first filter element 715 is arranged between the second limiting ring 714 and the third limiting ring 716;

[0050] The first fan wheel 717 is connected to a bearing on the side of the inside of the housing 71 away from the special-shaped limiting groove 75. A limiting frame 718 is clamped at the center of the third limiting ring 716. The first fan wheel 717 is connected to a bearing on the side of the limiting frame 718 close to the first fan wheel 717. The second fan wheel 719 is connected to a bearing on the side of the limiting frame 718 away from the first fan wheel 717. The side of the second fan wheel 719 away from the limiting frame 718 matches the diameter of the first limiting ring 76;

[0051] The center of the first fan wheel 717 is hollow. A second filter element 720 is fixedly connected to the central part of the second fan wheel 719. The filtration accuracy of the second filter element 720 is greater than that of the first filter element 715. When the housing cover 72 is fully connected to the housing 71, the magnetic core 77 is located at the center of the second fan wheel 719, and the second filter element 720 is located on the periphery of the magnetic core 77.

[0052] It should be noted that the first filter element 715 is preferably a filter element with an adjustable diameter, which can be a spliced filter screen or a deformable filter screen.

[0053] In actual operation, when the housing cover 72 and the housing 71 are in a separated state and the position restriction of the sleeve 711 by the limiting block 712 is released, the staff can separate the sleeve 711 from the oil inlet end 73, manually remove the second fan wheel 719, the limiting frame 718, and the first fan wheel 717 in sequence. Then, pull the enclosure 710 towards the housing cover 72. At this time, the spring 79 is compressed, and the second limiting ring 714 and the third limiting ring 716 can release the position restriction of the first filter element 715, so as to facilitate the removal of the first filter element 715 from the second limiting ring 714 and the third limiting ring 716, and then replace it with a new first filter element 715; when replacing the new first filter element 715, only in the state of pulling the enclosure 710, place the two ends of the first filter element 715 in the second limiting ring 714 and the third limiting ring 716 in sequence, and then release the enclosure 710. The spring 79 elongates under the action of the elastic force, and the position of the first filter element 715 can be fixed; then connect the sleeve 711 to the oil inlet end 73, use the limiting block 712 to limit the position of the sleeve 711, install the first fan wheel 717, the limiting frame 718, and the second fan wheel 719 into the inside of the housing 71 again, and then bolt-connect the housing cover 72 and the housing 71; when the housing cover 72 is fully connected to the housing 71, the positions of the first limiting ring 76 and the second filter element 720 correspond, and the position of the enclosure 710 corresponds to the special-shaped limiting groove 75. Furthermore, the housing cover 72 restricts the positions of the enclosure 710, the slide plate 78, the first filter element 715, and the second fan wheel 719. At the same time, when the housing cover 72 is fully connected to the housing 71, the limiting block 712 abuts against the housing cover 72, and the position of the limiting block 712 can also be restricted, thereby ensuring that the sleeve 711 will not loosen during the actual use of the filtering mechanism 7 and reducing the filtration accuracy;

[0054] In the use of the filtering mechanism 7, the hydraulic oil enters the interior of the enclosure 710 through the oil inlet end 73 and the sleeve 711. Under the impact of the hydraulic oil, the second fan wheel 719 rotates, promoting the flow of the hydraulic oil into the interior of the first filter element 715. While the hydraulic oil is flowing, the hydraulic oil can drive the first fan wheel 717 to rotate, further promoting the flow of the hydraulic oil and improving the uniformity of the filtration of the first filter element 715; at the same time, since the center of the first fan wheel 717 is hollow, when there are metal impurities, the metal impurities can enter from the central part of the first fan wheel 717 and be adsorbed by the magnetic core 77. At the same time, the rotating first fan wheel 717 can prevent excessive blocked impurities from appearing on the first filter element 715; also, since the magnetic core 77 is located in the central part of the second fan wheel 719 and the second filter element 720 is located outside the magnetic core 77, the filtration accuracy of the second filter element 720 is greater than that of the first filter element 715. Therefore, the hydraulic oil entering the enclosure 710 cannot directly impact the magnetic core 77, that is, it can prevent the metal impurities adsorbed on the magnetic core 77 from being impacted again into the first filter element 715 and being filtered again by the first filter element 715.

[0055] In this embodiment, the hydraulic oil in the hydraulic system can be filtered and the metal impurities can be adsorbed, reducing the risk of blockage of the filtering mechanism 7.

[0056] Embodiment Three:

[0057] Please refer to Figure 9 , on the basis of Embodiment One and Embodiment Two, the following structure is added and improved: Taking the operation of a single set of hydraulic cylinders 8 as an example, the second oil outlet pipeline 5b of the hydraulic pump 5 is connected with two branch pipelines, which are the first branch pipeline 5c and the second branch pipeline 5d respectively. Valves 9 are connected to the first branch pipeline 5c and the second branch pipeline 5d. The other ends of the valves 9 are sequentially connected with the filtering mechanism 7 and the reversing valve 6. The two working oil ports 6b of the two reversing valves 6 are respectively connected to the two oil cavities of the hydraulic cylinder 8, and the oil return port 6c of the reversing valve 6 is connected to the oil return pipeline 3b of the oil tank 3.

[0058] A first pressure sensor 731 is arranged on the oil inlet end 73 of the filtering mechanism 7, and a second pressure sensor 741 is arranged on the oil outlet end 74 of the filtering mechanism 7. The first pressure sensor 731 is used to detect the hydraulic oil pressure at the oil inlet end 73 of the filtering mechanism 7, and the second pressure sensor 741 is used to detect the hydraulic oil pressure at the oil outlet end 74 after being filtered by the filtering mechanism 7. The first pressure sensor 731 and the second pressure sensor 741 are connected with a collection and analysis module, and the collection and analysis module is used to analyze the relationship between the pressure difference of the hydraulic oil before and after the filtering mechanism 7 filters and the amount of impurities.

[0059] The integrated hydraulic system also includes an impurity weighing module and a time module. The impurity weighing module is used to weigh the weight of the metal impurities adsorbed on the magnetic core 77 when replacing the first filter element 715 in the filter mechanism 7. The time module is used to record the usage time of the two-component filter mechanisms 7. The impurity weighing module and the time module are signal-connected to the acquisition and analysis module;

[0060] It should be noted that the filtration precisions of the first filter elements 715 in the two filter mechanisms 7 are different. One group of the first filter elements 715 is of high precision, and the other group of the first filter elements 715 is of low precision. In order to reduce the usage cost of the hydraulic oil during the operation of the hydraulic system, the hydraulic oil in the fuel tank 3 can be replaced according to the load of the hydraulic cylinder 8 during the actual use process. High-quality hydraulic oil is used when the load of the hydraulic cylinder 8 is large, and low-quality hydraulic oil is used when the load of the hydraulic cylinder 8 is small. When using high-quality hydraulic oil, the hydraulic oil is filtered by the filter mechanism 7 equipped with the high-precision first filter element 715. Similarly, when using low-quality hydraulic oil, the hydraulic oil is filtered by the filter mechanism 7 equipped with the low-precision first filter element 715. At this time, both the high-quality hydraulic oil and the low-quality hydraulic oil can meet the normal operation of the hydraulic pump 5 and do not affect the normal operation of the hydraulic cylinder 8.

[0061] Operation method of the integrated hydraulic system:

[0062] Step 1: The motor 4 starts to drive the hydraulic pump 5 to suck and pressurize the oil from the fuel tank 3. The hydraulic system controls the opening of the corresponding valve 9 according to the quality of the used hydraulic oil. After the hydraulic oil enters the filter mechanism 7, the reversing valve 6 switches the oil circuit according to the control signal and sends the hydraulic oil into the corresponding oil chamber of the hydraulic cylinder 8 to push the piston to move.

[0063] Step 2: The acquisition and analysis module acquires the hydraulic oil pressures collected by the first pressure sensor 731 and the second pressure sensor 741 on the corresponding working branch during the normal operation of the hydraulic system and calculates the pressure difference to judge whether the filter mechanism 7 filters normally.

[0064] Specifically, the pressure value detected by the first pressure sensor 731 is denoted as f1, the pressure value detected by the second pressure sensor 741 is denoted as f2, the pressure difference is denoted as ∆F, ∆F = f1 - f1, and a pressure difference threshold F is set in the acquisition and analysis module;

[0065] When 0 < ∆F < F, the filter mechanism 7 filters normally;

[0066] When ∆F < 0, it means that the first pressure sensor 731 and the second pressure sensor 741 connected to the oil inlet end 73 and the oil outlet end 74 of the filter mechanism 7 detect abnormally. The hydraulic system gives an alarm prompt and the staff processes it;

[0067] When ∆F > F, it indicates that the first filter element 715 in the filtering mechanism 7 is blocked. The hydraulic system gives an alarm prompt. Meanwhile, the hydraulic system switches the working branch circuit, opens the valve 9 on the other branch, uses the filtering mechanism 7 on the other branch for filtering, and the reversing valve 6 switches the oil circuit. The valve 9 and the reversing valve 6 on the original branch are closed.

[0068] Step 3: The staff replaces the blocked first filter element 715 in the filtering mechanism 7 and weighs the weight of the metal impurities adsorbed on the magnetic core 77. The hydraulic system judges the reasons for excessive metal impurities and the first filter element 715 based on the filtering time of the filtering mechanism 7 and the weight of the metal impurities.

[0069] Specifically, since the valves 9 and the reversing valve 6 at both ends of the filtering mechanism 7 on the originally blocked branch are in the closed state, the staff can directly replace the blocked first filter element 715 in the filtering mechanism 7, clean the first fan wheel 717, the second fan wheel 719, and the second filter element 720, and weigh the weight of the metal impurities adsorbed on the magnetic core 77. The weight of the metal impurities is denoted as g. After weighing, the weight of the metal impurities is input into the weighing module. There is a weight threshold set in the impurity weighing module, and the weight threshold is denoted as G.

[0070] The time module respectively records the filtering times of the filtering mechanisms 7 on the two branches. The actual filtering time of the filtering mechanism 7 corresponding to the first filter element 715 with high precision is denoted as t1, and the actual filtering time of the filtering mechanism 7 corresponding to the first filter element 715 with low precision is denoted as t2. For the convenience of subsequent description, they are uniformly denoted as t. There is also a basic filtering time T of the filtering mechanism 7 set in the time module. When the actual filtering time is lower than the basic filtering time, it indicates abnormal hydraulic movement or the quality of the hydraulic oil cannot meet the normal requirements, which is likely to cause damage to the equipment inside the hydraulic system.

[0071] When g < G and t > T, it means that the filtering time of this filtering mechanism 7 is normal, the wear of the equipment is small, and the quality of the corresponding hydraulic oil used is appropriate.

[0072] When g < G and t ≤ T, it means that the filtering time of this filtering mechanism 7 is short, the wear of the equipment is small, but the quality of the corresponding hydraulic oil used cannot meet the normal use. If the hydraulic oil used at that time is of low quality, high-quality hydraulic oil needs to be replaced. If the hydraulic oil used at that time is of high quality, the hydraulic system gives an alarm prompt, and the staff needs to clean the oil cavities of the relevant components inside the hydraulic system to avoid the accumulation of non-metallic impurities and reduce the filtering effect.

[0073] When g ≥ G and t > T, it means that the filtering time of this filtering mechanism 7 is normal, but the wear of the equipment is large. The quality of the corresponding hydraulic oil used meets the normal use, but there is an incorrect fit of the internal components of the hydraulic system. The hydraulic system gives an alarm prompt, and the staff needs to check whether there is an incorrect fit of the internal components of the hydraulic system, resulting in increased wear during use.

[0074] When g ≥ G and t ≤ T, the filtering time of the filtering mechanism 7 is short, the wear of the equipment is large, and the quality of the hydraulic oil used cannot meet the normal use. If low-quality hydraulic oil is used at that time, high-quality hydraulic oil needs to be replaced. If high-quality hydraulic oil is used at that time, the hydraulic system will give an alarm prompt, and the staff needs to check whether there is incorrect mating of the internal components of the hydraulic system, which leads to increased wear during use. At the same time, the oil cavities of the relevant components inside the hydraulic system also need to be cleaned to avoid the accumulation of non-metallic impurities.

[0075] It should be noted that if the filtering accuracy of the filter element 715 in the filtering mechanism 7 is the same, when one group of filter elements 715 is blocked, the valve 9 on the branch can be closed to keep the reversing valve 6 on this branch in a normal operating state, so as to provide a reversing space for the hydraulic oil with the oil cavity of the hydraulic cylinder 8, and use the reverse flow of the hydraulic oil to the filtering mechanism 7 to flush open the blocked part of the filter element 715, achieving the effect of self-cleaning of the filter element 715.

[0076] In this embodiment, by setting two groups of filtering mechanisms 7, the self-cleaning of the filtering mechanism 7 can be realized. At the same time, according to the actual use conditions, by selecting different filtering mechanisms 7 and hydraulic oils, the application cost of the integrated hydraulic system can be reduced on the basis of ensuring normal operation, the service life of the filtering mechanism 7 can be extended as much as possible, and the time affecting normal operation caused by replacing the filter element 715 can be reduced.

[0077] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0078] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated hydraulic system, comprising a connecting frame (1), an oil tank (3), two sets of motors (4), two sets of hydraulic pumps (5), a reversing valve (6), a filtering mechanism (7), an impurity weighing module and a time module, characterized in that: The filtering mechanism (7) comprises a housing (71), a housing cover (72), an oil inlet end (73), an oil outlet end (74), a magnetic core (77), a filter element 1 (715), a fan wheel 1 (717), and a fan wheel 2 (719); A pressure sensor 1 (731) is provided on the oil inlet end (73) of the filter mechanism (7), and a pressure sensor 2 (741) is provided on the oil outlet end (74) of the filter mechanism (7). The pressure sensor 1 (731) is used to detect the pressure of the hydraulic oil at the oil inlet end (73) of the filter mechanism (7), and the pressure sensor 2 (741) is used to detect the pressure of the hydraulic oil at the oil outlet end (74) after filtering by the filter mechanism (7). The pressure sensor 1 (731) and the pressure sensor 2 (741) are connected to a collection and analysis module; The shell cover (72) is fixedly connected with a special-shaped limiting groove (75) and a limiting ring 1 (76) on one side close to the shell body (71); the magnetic core (77) is arranged on the shell cover (72); and the impeller 1 (717) and the impeller 2 (719) are arranged inside the shell body (71); A slide plate (78) is slidably connected inside the housing (71), and a side of the slide plate (78) close to the second limiting ring (714) is fixedly connected to the third limiting ring (716); The impeller 1 (717) is connected to a bearing on a side of the housing (71) away from the special-shaped limiting groove (75); the limiting ring 3 (716) is centrally clamped to the limiting frame (718); the impeller 1 (717) is connected to a bearing on a side of the limiting frame (718) close to the impeller 1 (717); the impeller 2 (719) is connected to a bearing on a side of the limiting frame (718) away from the impeller 1 (717); and the diameter of the side of the impeller 2 (719) away from the limiting frame (718) matches that of the limiting ring 1 (76); The center of the impeller 1 (717) is hollow, and the center part of the impeller 2 (719) is fixedly connected with the filter element 2 (720), the filtering accuracy of the filter element 2 (720) is greater than the filtering accuracy of the filter element 1 (715), and when the shell cover (72) is completely connected to the shell (71), the magnetic core (77) is located at the center of the impeller 2 (719), and the filter element 2 (720) is located on the periphery of the magnetic core (77); The acquisition and analysis module is used to analyze the relationship between the pressure difference of the hydraulic oil before and after filtration by the filtering mechanism (7) and the amount of impurities; The impurity weighing module is used to weigh the weight of metal impurities adsorbed on the magnetic core (77) when replacing the filter element 1 (715) in the filter mechanism (7); The time module is used to record the use time of the two groups of on-line filtering mechanisms (7), and the impurity weighing module and the time module are connected to the signal of the acquisition and analysis module.

2. An integrated hydraulic system according to claim 1, characterized in that: The connecting frame (1) is fixedly connected to a box body (2); the oil tank (3), two groups of motors (4), and two groups of hydraulic pumps (5) are fixed inside the box body (2); the oil tank (3) is provided with an oil outlet pipeline (3a) and an oil return pipeline (3b); the hydraulic pump (5) is provided with an oil inlet pipeline (5a) and an oil outlet pipeline (5b); the oil inlet pipelines (5a) of the two groups of hydraulic pumps (5) are connected to the oil outlet pipeline (3a) of the oil tank (3) in parallel; the motor (4) and the hydraulic pump (5) are fixedly connected; the housing (71) and the housing cover (72) are connected by bolts; the oil inlet end (73) and the oil outlet end (74) are respectively fixed to two sides of the housing (71); the reversing valve (6) comprises an oil inlet port (6a), two working oil ports (6b), an oil return port (6c), and a reversing oil port.

3. An integrated hydraulic system according to claim 2, characterized in that: The oil outlet pipeline 2 (5b) of the hydraulic pump (5) is connected to the oil inlet end (73) of the filter mechanism (7) through a pipeline, the oil outlet end (74) of the filter mechanism (7) is connected to the oil inlet port (6a) of the reversing valve (6) through a pipeline, the two working oil ports (6b) of the reversing valve (6) are respectively connected to the two oil chamber pipelines of the hydraulic cylinder (8), and the oil return port (6c) of the reversing valve (6) is connected to the oil return pipeline (3b) of the oil tank (3) through a pipeline.

4. An integrated hydraulic system according to claim 2, characterized in that: The oil outlet pipeline 2 (5b) of the hydraulic pump (5) is connected to two groups of branches, the branches are respectively branch pipeline 1 (5c) and branch pipeline 2 (5d), the branch pipeline 1 (5c) and the branch pipeline 2 (5d) are connected to valves (9), the other ends of the valves (9) are connected to a filter mechanism (7) and a reversing valve (6) in sequence, the two groups of working oil ports (6b) of the two groups of reversing valves (6) are respectively connected to the two oil chambers of the hydraulic cylinder (8), and the oil return port (6c) of the reversing valve (6) is connected to the oil return pipeline (3b) of the oil tank (3).

5. An integrated hydraulic system according to claim 3 or 4, characterized in that: The special-shaped limiting groove (75) is arranged on the periphery of the limiting ring (76), the magnetic core (77) is arranged at the center of the limiting ring (76), and the magnetic core (77) is clamped with the shell cover (72).

6. An integrated hydraulic system according to claim 5, characterized in that: The slide plate (78) is fixedly connected to a plurality of springs (79) near the shell cover (72), and the other end of the spring (79) is fixedly connected to the inside of the shell (71); A side of the slide plate (78) close to the shell cover (72) is fixedly connected to a baffle (710), the baffle (710) matches the shape and size of the special-shaped limiting groove (75), a side of the baffle (710) close to the oil inlet end (73) is slidably connected to a sleeve (711), the outer diameter of the sleeve (711) matches the inner diameter of the pipeline at the oil inlet end (73), a side of the baffle (710) close to the oil inlet end (73) is internally fixedly connected to a limiting rod, and the slide plate (78) close to the oil inlet end Two groups of limit grooves (713) are provided on one side of the sleeve (73), and a limit groove (713) is provided on the side of the sleeve (711) away from the oil inlet end (73). The limit groove (713) matches the limit groove (713) in shape, size and position. Limit blocks (712) are provided inside the limit groove (713) and the limit groove (712). The limit block (712) is slidably connected to the slide plate (78) and the sleeve (711), and the limit rod is located on the side of the limit groove (713) away from the oil inlet end (73).

7. An integrated hydraulic system according to claim 6, characterized in that: A second limiting ring (714) is fixedly connected to the side of the housing (71) away from the special-shaped limiting groove (75); the second limiting ring (714) and the third limiting ring (716) have matching diameters; and the filter element (715) is arranged between the second limiting ring (714) and the third limiting ring (716).

8. An integrated hydraulic system according to claim 7, characterized in that: The integrated hydraulic system operates as follows: Step 1: The motor (4) starts to drive the hydraulic pump (5) to suck oil from the oil tank (3) and pressurize it. The hydraulic system controls the valve (9) on the corresponding side to open according to the quality of the hydraulic oil used. After the hydraulic oil enters the filter mechanism (7), the reversing valve (6) switches the oil circuit according to the control signal and sends the hydraulic oil into the corresponding oil chamber of the hydraulic cylinder (8) to push the piston to move. Step 2: The collection and analysis module collects the hydraulic oil pressure collected by the pressure sensor 1 (731) and the pressure sensor 2 (741) on the corresponding working branch during the normal operation of the hydraulic system and calculates the pressure difference to determine whether the filtering mechanism (7) is filtering normally; Step 3: The staff replaces the clogged filter element 1 (715) in the filter mechanism (7) and weighs the weight of the metal impurities adsorbed on the magnetic core (77). The hydraulic system determines the cause of the excessive metal impurities and the filter element 1 (715) based on the filtering time of the filter mechanism (7) and the weight of the metal impurities.

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