Integrated hydraulic system

Abstract

The invention discloses an integrated hydraulic system, which is applied to the technical field of integrated hydraulic systems and comprises 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 comprises a shell, a shell 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 at the oil inlet end of the filtering mechanism, a second pressure sensor is arranged at the oil outlet end of the filtering mechanism, and the first pressure sensor and the second pressure sensor are connected with an acquisition and analysis module. The acquisition and analysis module is used for analyzing the relationship between the pressure difference of the hydraulic oil before and after filtering of the filtering mechanism and the impurity quantity; and the impurity weighing module is used for weighing the weight of metal impurities adsorbed on the magnetic core when the filter element I in the filter mechanism is replaced. According to the invention, long-time normal operation of the hydraulic system can be ensured.

Description

Technical Field

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

[0002] At present, most construction machinery operates through hydraulic systems, which mainly include hydraulic pumps, hydraulic valves, hydraulic cylinders, hydraulic motors, hydraulic oil, etc. The hydraulic oil is stored in the hydraulic oil tank and serves as a working medium for energy transfer and lubrication. The hydraulic oil is sucked out of the hydraulic oil tank by the hydraulic oil pump, and after the hydraulic oil is pressurized, it is transported to the hydraulic cylinder and other actuators through hydraulic pipelines, hydraulic valves and other components. The hydraulic oil after work returns to the hydraulic oil tank through the return oil pipeline and the working cycle repeats over and over again.

[0003] Most hydraulic failures are caused by poor cleanliness of hydraulic oil. Therefore, filters are usually used to filter the hydraulic oil to improve the cleanliness of the hydraulic oil sucked by the pump. Due to the different working conditions of the integrated hydraulic system, as the working time of the filter increases, the actual use time of the filter element is also different. If the filter element is replaced at the time interval specified by the manufacturer, such as: once every 500 hours or once every 1000 hours, etc., there will be more and more impurities on the filter surface, the filter element holes will be blocked, the pressure difference will increase, and the filtering effect will gradually be lost. It cannot be discovered in time. If the pressure difference reaches a certain value, the oil volume of the hydraulic system will be insufficient to support the normal operation of the entire hydraulic system, and replacing the filter element at this time 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 object of the present invention is to provide an integrated hydraulic system, which can ensure that the hydraulic system works normally for a long time, so as to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an integrated hydraulic system, including a connecting frame, an oil tank, two sets of motors, two sets of hydraulic pumps, a reversing valve, a filtering mechanism, an impurity weighing module and a time module; The filtering mechanism comprises a shell, a shell cover, an oil inlet end, an oil outlet end, a magnetic core, a filter element 1, a fan wheel 1 and a fan wheel 2; A pressure sensor 1 is provided on the oil inlet end of the filter mechanism, and a pressure sensor 2 is provided on the oil outlet end of the filter mechanism. The pressure sensor 1 is used to detect the hydraulic oil pressure at the oil inlet end of the filter mechanism, and the pressure sensor 2 is used to detect the hydraulic oil pressure at the oil outlet end after filtering by the filter mechanism. The pressure sensor 1 and the pressure sensor 2 are connected to a collection and analysis module; The acquisition and analysis module is used to analyze the relationship between the pressure difference of the hydraulic oil before and after filtration and the amount of impurities; The impurity weighing module is used to weigh the weight of metal impurities adsorbed on the magnetic core when the filter element in the filter mechanism is replaced; The time module is used to record the use time of the filtering mechanisms on the two groups of routes, and the impurity weighing module and the time module are connected with the signal of the acquisition and analysis module.

[0007] According to the above technical scheme, a box body is fixedly connected to the connecting frame, and an oil tank, two sets of motors, and two sets of hydraulic pumps are fixed inside the box body. The oil tank is provided with an oil outlet pipeline 1 and an oil return pipeline, and the hydraulic pump is provided with an oil inlet pipeline and an oil outlet pipeline 2. The oil inlet pipelines of the two sets of hydraulic pumps are connected to the oil outlet pipeline 1 of the oil tank in parallel, and the motor is fixedly connected to the hydraulic pump; the shell and the shell cover are connected by bolts, and the oil inlet end and the oil outlet end are respectively fixed on both sides of the shell; the reversing valve includes an oil inlet port, two working oil ports, an oil return port, and a reversing oil port.

[0008] According to the above technical scheme, the oil outlet pipeline 2 of the hydraulic pump is connected to the oil inlet pipeline of the filtering mechanism, the oil outlet end of the filtering mechanism is connected to the oil inlet pipeline of the reversing valve, the two working oil ports of the reversing valve are respectively connected to the two oil chamber pipelines of the hydraulic cylinder, and the oil return port of the reversing valve is connected to the oil return pipeline of the oil tank.

[0009] According to the above technical scheme, the second oil outlet pipeline of the hydraulic pump is connected with two groups of branches, namely branch pipeline one and branch pipeline two, branch pipeline one and branch pipeline two are connected with valves, and the other end of the valve is connected with a filter mechanism and a reversing valve in sequence, and the two groups of working oil ports of the two groups of reversing valves are respectively connected to the hydraulic cylinder.

[0010] According to the above technical solution, the magnetic core is arranged on the shell cover, and the impeller 1 and the impeller 2 are arranged inside the shell; The shell cover is fixedly connected with a special-shaped limiting groove and a limiting ring 1 on one side close to the shell body. The special-shaped limiting groove is arranged on the periphery of the limiting ring 1, the magnetic core is arranged at the center of the limiting ring 1, and the magnetic core is clamped with the shell cover.

[0011] According to the above technical solution, a slide plate is slidably connected inside the shell, a plurality of springs are fixedly connected to the side of the slide plate close to the shell cover, and the other end of the spring is fixedly connected to the inside of the shell; A baffle is fixedly connected to the side of the slide plate near the shell cover, and the shape and size of the baffle match the special-shaped limit groove. A sleeve is slidably connected to the side of the slide plate near the oil inlet end, and the outer diameter of the sleeve matches the inner diameter of the oil inlet pipeline. A limit rod is fixedly connected to the inside of the side of the slide plate near the oil inlet end. Two sets of limit grooves 1 are provided on the side of the slide plate near the oil inlet end, and a limit groove 2 is provided on the side of the sleeve away from the oil inlet end. The shape, size and position of the limit groove 2 match those of the limit groove 1. Limit blocks are arranged inside the limit grooves 1 and 2, and the limit blocks are slidably connected to the slide plate and the sleeve. The limit rod is located on the side of the limit groove 1 away from the oil inlet end.

[0012] According to the above technical solution, the side of the shell away from the special-shaped limiting groove is fixedly connected to the limiting ring 2, the side of the slide plate close to the limiting ring 2 is fixedly connected to the limiting ring 3, the diameters of the limiting ring 2 and the limiting ring 3 are matched, and the filter element 1 is arranged between the limiting ring 2 and the limiting ring 3.

[0013] According to the above technical solution, impeller 1 is connected to a bearing on the side of the shell body away from the special-shaped limit groove, limit ring 3 is centrally clamped on the limit frame, impeller 1 is connected to a bearing on the side of the limit frame close to impeller 1, impeller 2 is connected to a bearing on the side of the limit frame away from impeller 1, and the diameter of impeller 2 away from the limit frame matches that of limit ring 1.

[0014] According to the above technical solution, the center of impeller one is hollow, and filter element two is fixedly connected to the central part of impeller two. The filtering accuracy of filter element two is greater than that of filter element one. When the shell cover is fully connected to the shell body, the magnetic core is located at the center of impeller two, and filter element two is located outside the magnetic core.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention, by providing two sets of motors and hydraulic pumps connected in parallel, can realize the operation of two sets of hydraulic cylinders, save some devices in the hydraulic system, and reduce the occupied space of the hydraulic system; By arranging two sets of filtering mechanisms on the control pipeline of a single hydraulic cylinder, it is possible to achieve self-cleaning of the filtering mechanism. According to the actual use conditions of the hydraulic cylinder, filtering mechanisms on different branches are selected for filtering. On the basis of ensuring that the hydraulic rod can operate normally, the application cost of the hydraulic system is reduced and the service life of the filtering mechanism is extended. At the same time, by arranging two sets of filtering mechanisms, the time temporarily occupied by replacing the filter element in the hydraulic system can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the overall mechanism and pipeline connection of the present invention; Figure 4 It is a schematic diagram of the overall structure of the filtering mechanism of the present invention; Figure 5 It is an exploded schematic diagram of the overall structure of the filtering mechanism of the present invention; Figure 6 It is a partial exploded schematic diagram of the structure of the filter mechanism of the present invention; Figure 7 is an exploded schematic diagram of the end of the filter mechanism of the present invention; Figure 8 It is a schematic cross-sectional view of a part of the structure of the filtering mechanism of the present invention; Fig. 9 It is a schematic diagram of the pipeline of two sets of filtering mechanisms connected in parallel in a partial structure of the present invention; In the figure: 1, connecting frame; 2, box body; 3, oil tank; 3a, oil outlet pipeline 1; 3b, oil return pipeline; 4, motor; 5, hydraulic pump; 5a, oil inlet pipeline; 5b, oil outlet pipeline 2; 5c, branch pipeline 1; 5d, branch pipeline 2; 6, reversing valve; 6a, oil inlet; 6b, working oil port; 6c, oil return port; 7, filtering mechanism; 8, hydraulic cylinder; 9, valve; 71. Shell; 72. Shell cover; 73. Oil inlet; 731. Pressure sensor 1; 74. Oil outlet; 741. Pressure sensor 2; 75. Special-shaped limit groove; 76. Limit ring 1; 77. Magnetic core; 78. Slide plate; 79. Spring; 710. Enclosure; 711. Sleeve; 712. Limit block; 713. Limit groove 1; 714. Limit ring 2; 715. Filter element 1; 716. Limit ring 3; 717. Fan wheel 1; 718. Limit frame; 719. Fan wheel 2; 720. Filter element 2. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: See also Figure 1-4 The present invention provides a technical solution: an integrated hydraulic system, including a connecting frame 1, an oil tank 3, two motors 4, two hydraulic pumps 5, a reversing valve 6 and a filtering mechanism 7. The connecting frame 1 is fixedly connected with a box body 2. The oil tank 3, two motors 4 and two hydraulic pumps 5 are fixed inside the box body 2. The oil tank 3 is provided with an oil outlet pipeline 1 3a and an oil return pipeline 3b. The hydraulic pump 5 is provided with an oil inlet pipeline 5a and an oil outlet pipeline 2 5b. The oil inlet pipelines 5a of the two hydraulic pumps 5 are connected to the oil outlet pipeline 1 3a of the oil tank 3 in parallel. The motor 4 is fixedly connected with the hydraulic pump 5. The motor 4 is used to drive the hydraulic pump 5 to operate to suck and pressurize oil. The filtering mechanism 7 includes a shell 71, a shell cover 72, an oil inlet end 73 and an oil outlet end 74. The shell 71 is connected to the shell cover 72 by bolts. The oil inlet end 73 and the oil outlet end 74 are respectively fixed on both sides of the shell 71. The oil outlet pipeline 25b of the hydraulic pump 5 is connected to the oil inlet end 73 of the filtering mechanism 7. The reversing valve 6 includes an oil inlet port 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 port 6a of the reversing valve 6. 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. The oil return port 6c of the reversing valve 6 is connected to the oil return pipeline 3b of the oil tank 3.

[0019] Working principle: the motor 4 starts to drive the hydraulic pump 5 to suck oil from the oil tank 3 and pressurize it. The hydraulic oil enters the filter mechanism 7 through the oil outlet pipeline 5b, and enters the reversing valve 6 after being filtered by the filter mechanism 7. The reversing valve 6 switches the oil circuit according to the control signal, and sends the hydraulic oil to 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 oil tank 3 through the reversing valve 6 to complete a working cycle.

[0020] It should be noted that the structures of the oil tank 3, two sets of motors 4, two sets of hydraulic pumps 5, and the reversing valve 6 and the connection method adopted by the single set of oil tank 3, motor 4, hydraulic pump 5, reversing valve 6, and filtering mechanism 7 are all existing technologies and will not be elaborated here.

[0021] In this embodiment, the integrated hydraulic system can realize the operation of two groups of hydraulic cylinders 8 at the same time by connecting two groups of motors 4 and hydraulic pumps 5 in parallel, saving some devices, reducing the occupied space of the hydraulic system and reducing production costs.

[0022] Embodiment 2: See also Figure 5-Figure 8 On the basis of the first embodiment, the following structure is added: Figure 6 As shown, the filtering mechanism 7 also includes a magnetic core 77 , a fan wheel 1 717 and a fan wheel 2 719 . The magnetic core 77 is arranged on the shell cover 72 , and the fan wheel 1 717 and the fan wheel 2 719 are arranged inside the shell 71 .

[0023] like Figure 5 As shown, the shell cover 72 is fixedly connected with a special-shaped limiting groove 75 and a limiting ring 76 on one side close to the shell body 71. The special-shaped limiting groove 75 is arranged on the periphery of the limiting ring 76, and the magnetic core 77 is arranged at the center of the limiting ring 76. The magnetic core 77 is clamped with the shell cover 72, and the magnetic core 77 is used to adsorb metal impurities in the filtering mechanism 7.

[0024] like Figure 6-Figure 8 As shown, a slide plate 78 is slidably connected to the inside of the housing 71, and a plurality of springs 79 are fixedly connected to one side of the slide plate 78 close to the housing cover 72, and the other end of the spring 79 is fixedly connected to the inside of the housing 71; A side of the slide plate 78 close to the shell cover 72 is fixedly connected with a baffle 710, and the baffle 710 matches the shape and size of the special-shaped limiting groove 75. A side of the slide plate 710 close to the oil inlet end 73 is slidably connected with a sleeve 711, and the outer diameter of the sleeve 711 matches the inner diameter of the pipeline of the oil inlet end 73. A limiting rod is fixedly connected inside the side of the slide plate 78 close to the oil inlet end 73. Two groups of limiting grooves 1 713 are provided on the side of the slide plate 78 close to the oil inlet end 73. A limiting groove 2 is provided on the side of the sleeve 711 away from the oil inlet end 73. The shape, size and position of the limiting groove 2 match those of the limiting groove 1 713. A limiting block 712 is provided inside the limiting groove 1 713 and the limiting groove 2. The limiting block 712 is horizontally arranged in a Y shape. The limiting block 712 is slidably connected to the slide plate 78 and the sleeve 711, and the limiting rod is located on the side of the limiting groove 1 713 away from the oil inlet end 73. In actual operation, the limit block 712 is manually pulled out from the limit groove 1 713 and the limit groove 2, so that the position restriction of the limit block 712 on the sleeve 711 can be released, and the position restriction of the limit rod on the limit block 712 can also be released, so that the sleeve 711 can move horizontally, which is convenient for connecting with the pipeline of the oil inlet end 73. Conversely, the limit block 712 is inserted into the limit groove 2 and the limit groove 1 713, so that the limit rod can limit the position of the limit block 712, and the limit block 712 can limit the position of the sleeve 711; like Figure 6 and Figure 8 As shown, a second limiting ring 714 is fixedly connected to the side of the housing 71 away from the special-shaped limiting groove 75, and a third limiting ring 716 is fixedly connected to the side of the slide plate 78 close to the second limiting ring 714. The diameters of the second limiting ring 714 and the third limiting ring 716 match, and the filter element 1 715 is arranged between the second limiting ring 714 and the third limiting ring 716; The impeller 1 717 is connected to the bearing of the side of the housing 71 away from the special-shaped limiting groove 75, the limiting ring 3 716 is centrally clamped with the limiting frame 718, the impeller 1 717 is connected to the bearing of the limiting frame 718 close to the impeller 1 717, the impeller 2 719 is connected to the bearing of the side of the limiting frame 718 away from the impeller 1 717, and the side of the impeller 2 719 away from the limiting frame 718 matches the diameter of the limiting ring 1 76; The center of impeller 1 717 is hollow, and filter element 2 720 is fixedly connected to the central part of impeller 2 719. The filtering accuracy of filter element 2 720 is greater than the filtering accuracy of filter element 1 715. When the shell cover 72 and the shell body 71 are fully connected, the magnetic core 77 is located at the center of impeller 2 719, and the filter element 2 720 is located on the periphery of the magnetic core 77.

[0025] It should be noted that the filter element 715 is preferably a filter element with adjustable diameter, which can be a filter mesh splicing or a deformable filter mesh.

[0026] When the locking cam 710 is in a state of being lifted up, the locking cam 711 can be lifted and the locking cam 712 can be used to lock the locking cam 710. When the locking cam 710 is in a state of being lifted up, the locking cam 710 can be used to lock the locking cam 710. , the position of the filter element 1 715 can be fixed; then the sleeve 711 is connected to the oil inlet end 73, and the position of the sleeve 711 is limited by the limit block 712, and the impeller 1 717, the limit frame 718, and the impeller 2 719 are installed inside the shell 71 again, and then the shell cover 72 is bolted to the shell 71; when the shell cover 72 is fully connected to the shell 71, the limit ring 1 76 corresponds to the position of the filter element 2 720, and the position of the enclosure 710 corresponds to the position of the special-shaped limit groove 75, so that the shell cover 72 limits the position of the enclosure 710, the slide plate 78, the filter element 1 715, and the impeller 2 719. At the same time, when the shell cover 72 is fully connected to the shell 71, the limit block 712 is against the shell cover 72, and the position of the limit block 712 can also be limited, thereby ensuring that the sleeve 711 will not loosen and reduce the filtering accuracy in actual use of the filter mechanism 7; When the filter mechanism 7 is in use, the hydraulic oil enters the enclosure 710 through the oil inlet end 73 and the sleeve 711. Under the impact of the hydraulic oil, the impeller 2 719 rotates to promote the hydraulic oil to flow into the filter element 1 715. While the hydraulic oil is flowing, the hydraulic oil can drive the impeller 1 717 to rotate, further promoting the circulation of the hydraulic oil and improving the uniformity of the filtration of the filter element 1 715. At the same time, since the center of the impeller 1 717 is hollow, when there are metal impurities, the metal impurities can enter from the center part of the impeller 1 717. 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 into the filter element 1 715 again and filtered again by the filter element 1 715.

[0027] In this embodiment, the hydraulic oil in the hydraulic system can be filtered and metal impurities can be adsorbed, thereby reducing the risk of clogging of the filter mechanism 7.

[0028] Embodiment three: See also Fig. 9 On the basis of implementation one and implementation two, the following structures are added and improvements are made: taking the operation of a single group of hydraulic cylinders 8 as an example, the oil outlet pipeline 2 5b of the hydraulic pump 5 is connected with two groups of branches, and the branches are branch pipeline 1 5c and branch pipeline 2 5d respectively. Valves 9 are connected to branch pipeline 1 5c and branch pipeline 2 5d, and the other end of the valve 9 is connected with 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 return oil port 6c of the reversing valve 6 is connected to the return oil pipeline 3b of the oil tank 3.

[0029] 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 hydraulic oil pressure of the oil inlet end 73 of the filter mechanism 7, and the pressure sensor 2 741 is used to detect the hydraulic oil pressure of 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, and the collection and analysis module is used to analyze the relationship between the pressure difference of the hydraulic oil before and after filtering by the filter mechanism 7 and the impurity mass; 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 metal impurities adsorbed on the magnetic core 77 when the filter element 715 in the filter mechanism 7 is replaced. The time module is used to record the use time of the filter mechanism 7 on the two groups of paths. The impurity weighing module and the time module are connected to the signal of the acquisition and analysis module. It should be noted that the filtering precision of the filter element 715 in the two groups of filtering mechanisms 7 is different, one group of filter element 715 is of high precision, and the other group of filter element 715 is of low precision; in order to reduce the cost of using hydraulic oil during the operation of the hydraulic system, the hydraulic oil in the oil tank 3 can be replaced according to the load of the hydraulic cylinder 8 in more actual use. 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 high-quality hydraulic oil is used, the hydraulic oil is filtered by the filtering mechanism 7 equipped with a high-precision filter element 715; similarly, when low-quality hydraulic oil is used, the hydraulic oil is filtered by the filtering mechanism 7 equipped with a low-precision 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.

[0030] How the integrated hydraulic system works: 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.

[0031] 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.

[0032] Specifically, the pressure value detected by the pressure sensor 1 731 is recorded as f1, the pressure value detected by the pressure sensor 2 741 is recorded as f2, the pressure difference is recorded as ∆F, ∆F=f1-f1, and a pressure difference threshold F is set in the acquisition and analysis module; When 0<∆F<F, the filtering mechanism 7 is filtering normally; When ∆F is less than 0, the pressure sensor 1 731 and the pressure sensor 2 741 connected to the oil inlet 73 and the oil outlet 74 of the filter mechanism 7 detect an abnormality, the hydraulic system gives an alarm, and the staff takes action; When ∆F>F, the filter element 715 in the filter mechanism 7 is blocked, and the hydraulic system gives an alarm. At the same time, the hydraulic system switches the working branch, opens the valve 9 on the other branch, uses the filter mechanism 7 on the other branch to filter, and the reversing valve 6 to switch the oil circuit, and the valve 9 and reversing valve 6 on the original branch are closed.

[0033] Step 3: The staff replaces the clogged filter element 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 715 based on the filtering time of the filter mechanism 7 and the weight of the metal impurities.

[0034] Specifically, since the valves 9 and the reversing valve 6 at both ends of the filter mechanism 7 on the originally blocked branch are in a closed state, the staff can directly replace the blocked filter element 1 715 in the filter mechanism 7, clean the fan wheel 1 717, the fan wheel 2 719 and the filter element 2 720, and weigh the weight of the metal impurities adsorbed on the magnetic core 77, the weight of the metal impurities is recorded as g, and after the weighing is completed, the weight of the metal impurities is input into the weighing module, and a weight threshold is set in the impurity weighing module, and the weight threshold is recorded as G; The time module records the filtering time of the two groups of filter mechanisms 7 respectively. The actual filtering time of the filter mechanism 7 equipped with a high-precision filter element 715 is recorded as t1, and the actual filtering time of the filter mechanism 7 equipped with a low-precision filter element 715 is recorded as t2. For the convenience of subsequent explanation, the same is recorded as t. The time module also provides a basic filtering time for the filter mechanism 7, and the basic filtering time is T. When the actual filtering time is lower than the basic filtering time, it means that the hydraulic movement is abnormal or the quality of the hydraulic oil cannot meet normal needs, which may easily cause damage to the equipment inside the hydraulic system.

[0035] When g<G, t>T, the filtering time of the filtering mechanism 7 is normal, the wear of the equipment is small, and the quality of the corresponding hydraulic oil used is appropriate; When g<G, t≤T, the filtering time of the filtering mechanism 7 is short, the wear of the equipment is small, and the quality of the corresponding hydraulic oil used cannot meet normal use. If the hydraulic oil used at that time is low-quality hydraulic oil, it is necessary to replace it with high-quality hydraulic oil. If the hydraulic oil used at that time is high-quality hydraulic oil, the hydraulic system will give an alarm prompt, and the staff needs to clean the oil cavity of the relevant parts inside the hydraulic system to avoid the accumulation of non-metallic impurities and reduce the filtering effect; When g≥G and t>T, the filtering time of the filtering mechanism 7 is normal, but the equipment is greatly worn. The quality of the corresponding hydraulic oil used meets normal use, but there are errors in the matching of the internal components of the hydraulic system. The hydraulic system will give an alarm prompt, and the staff needs to check whether there are errors in the matching of the internal components of the hydraulic system, which leads to increased wear during use; 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 corresponding hydraulic oil used cannot meet 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 any incorrect matching of the internal components of the hydraulic system, which leads to increased wear during use. At the same time, it is also necessary to clean the oil chambers of the relevant components inside the hydraulic system to avoid accumulation of non-metallic impurities.

[0036] It should be noted that if the filter elements 715 used in the filtering mechanism 7 have the same filtering accuracy, 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 the branch in a normal operating state, so that the oil chamber of the hydraulic cylinder 8 provides a reversing space for the hydraulic oil, and the reverse flow of the hydraulic oil to the filtering mechanism 7 is utilized to flush the blockage of the filter element 715, thereby achieving the self-cleaning effect of the filter element 715.

[0037] In this embodiment, by setting up two groups of filtering mechanisms 7, self-cleaning of the filtering mechanisms 7 can be achieved. At the same time, according to 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 mechanisms 7 can be extended as much as possible, and the time for normal operation affected by replacing the filter element 715 can be reduced.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in 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 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 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 (71); The shell cover (72) is fixedly connected with a special-shaped limiting groove (75) and a limiting ring (76) on one side close to the shell body (71); 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: A slide plate (78) is slidably connected to the interior of the housing (71); a plurality of springs (79) are fixedly connected to the slide plate (78) near the housing cover (72); and the other end of the spring (79) is fixedly connected to the interior of the housing (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: The side of the housing (71) away from the special-shaped limiting groove (75) is fixedly connected to the second limiting ring (714), and the side of the slide plate (78) close to the second limiting ring (714) is fixedly connected to the third limiting ring (716). The diameters of the second limiting ring (714) and the third limiting ring (716) match each other, 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 impeller 1 (717) is connected to a bearing on a side of the housing (71) away from the special-shaped limit groove (75); the limit ring 3 (716) is centrally engaged with the limit frame (718); the impeller 1 (717) is connected to a bearing on a side of the limit frame (718) close to the impeller 1 (717); the impeller 2 (719) is connected to a bearing on a side of the limit frame (718) away from the impeller 1 (717); and the diameter of the impeller 2 (719) away from the limit frame (718) matches that of the limit ring 1 (76).

9. An integrated hydraulic system according to claim 8, characterized in that: 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), and the filtering accuracy of the filter element 2 (720) is greater than the filtering accuracy of the filter element 1 (715). When the shell cover (72) and the shell body (71) are fully connected, 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).

10. An integrated hydraulic system according to claim 9, 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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