Hydraulic system suitable for long distance oil supply

Abstract

This disclosure relates to a hydraulic system suitable for long-distance oil supply, including at least one hydraulic subsystem and a backup subsystem. The hydraulic subsystem includes a first oil tank, a first hydraulic drive source, and hydraulic actuators. The first hydraulic drive source delivers hydraulic oil from the first oil tank to the hydraulic actuators. The backup subsystem includes a second oil tank, a second hydraulic drive source, and a replenishment unit. The second hydraulic drive source delivers hydraulic oil from the second oil tank to the hydraulic actuators. One end of a first replenishment pipeline is connected to the outlet of a first replenishment pump, and the other end delivers hydraulic oil to a corresponding replenishment motor. The output shaft of the replenishment motor is connected to the input shaft of a corresponding second replenishment pump. The inlet of the second replenishment pump is connected to the interior of the first oil tank, and one end of the second replenishment pipeline is connected to the outlet of the corresponding second replenishment pump, and the other end is connected to the interior of the second oil tank. This avoids the problems of poor oil suction, equipment damage, and hydraulic system failure caused by the second hydraulic drive source directly drawing oil from the first oil tank.

Description

Technical Field

[0001] This disclosure relates to the field of hydraulic technology, and more specifically, to a hydraulic system suitable for long-distance oil supply. Background Technology

[0002] In hydraulic system design, to ensure smooth oil intake by the hydraulic pump, the oil tank and the hydraulic pump are usually placed close together. However, in actual engineering projects or equipment, due to limitations in installation space and functional conditions, there are situations where the distance between the oil tank and the hydraulic pump is too large. When the distance exceeds a certain length, it will cause poor oil intake by the hydraulic pump, resulting in damage to the hydraulic pump and failure of the entire hydraulic system. Utility Model Content

[0003] The purpose of this disclosure is to provide a hydraulic system suitable for long-distance oil supply, in order to solve the technical problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides a hydraulic system suitable for long-distance oil supply, the hydraulic system suitable for long-distance oil supply including at least one hydraulic subsystem and a backup subsystem; The hydraulic subsystem includes a first oil tank, a first hydraulic drive source, and a hydraulic actuator. The first hydraulic drive source is used to deliver hydraulic oil from the first oil tank to the hydraulic actuator. The backup subsystem includes a second oil tank, a second hydraulic drive source, and an oil replenishment unit. The second hydraulic drive source is used to deliver hydraulic oil from the second oil tank to the hydraulic actuator. The oil replenishment unit includes a first oil replenishment pump, at least one first oil replenishment line, at least one oil replenishment motor, at least one second oil replenishment pump, and at least one second oil replenishment line; The inlet of the first replenishing pump is connected to the interior of the second oil tank; One end of the first replenishing oil line is connected to the outlet of the first replenishing oil pump, and the other end supplies hydraulic oil to the corresponding replenishing oil motor; The output shaft of the oil replenishment motor is connected to the input shaft of the corresponding second oil replenishment pump; The inlet of the second replenishing pump is connected to the inside of the first oil tank, one end of the second replenishing pipeline is connected to the outlet of the corresponding second replenishing pump, and the other end is connected to the inside of the second oil tank.

[0005] Optionally, the first replenishing pump is configured as a high-pressure, low-flow hydraulic pump, and the second replenishing pump is configured as a low-pressure, high-flow hydraulic pump, with the diameter of the first replenishing pipeline being smaller than the diameter of the second replenishing pipeline.

[0006] Optionally, the oil replenishment unit further includes a first valve component, which includes a first valve inlet and at least one first valve outlet. The first valve inlet is connected to the outlet of the first oil replenishment pump, and the first valve outlet is connected to the corresponding first oil replenishment pipeline.

[0007] Optionally, the backup subsystem further includes a first low-pressure oil suction line and a first high-pressure output line. One end of the first low-pressure oil suction line is connected to the inside of the second oil tank, and the other end is connected to the inlet of the second hydraulic drive source; The second hydraulic drive source supplies hydraulic oil to at least one of the hydraulic actuators in at least one of the hydraulic subsystems through the first high-pressure output pipeline.

[0008] Optionally, the hydraulic subsystem is configured to have at least two subsystems, wherein the first high-pressure output pipeline includes a main oil outlet pipeline, a second valve component, and at least two branch oil outlet pipelines; The second valve component includes a second valve inlet and at least two second valve outlets; One end of the main oil outlet pipeline is connected to the outlet of the second hydraulic drive source, and the other end is connected to the second valve inlet of the second valve component; One end of the oil outlet branch pipeline is connected to the corresponding outlet of the second valve, and the other end is connected to the corresponding hydraulic actuator.

[0009] Optionally, the diameter of the first low-pressure oil suction line is larger than the diameter of the first high-pressure output line.

[0010] Optionally, the backup subsystem further includes a lower limit liquid level detector, an upper limit liquid level detector, and a controller; The lower limit liquid level detection device is located at the lower part of the second oil tank, and the upper limit liquid level detection device is located at the upper part of the second oil tank. The lower limit liquid level detector, the upper limit liquid level detector, the second hydraulic drive source, and the first replenishing pump are all electrically connected to the controller; wherein, the controller is configured as follows: When the lower limit liquid level detection device does not detect hydraulic oil, the controller controls the first oil replenishment pump to work and controls the second hydraulic drive source to stop working; When the upper limit liquid level detection device detects hydraulic oil, the controller controls the first replenishing pump and the second hydraulic drive source to stop working.

[0011] Optionally, the second oil tank has an overflow outlet, the overflow outlet is provided with an overflow valve, the overflow valve is electrically connected to the controller, and the controller is configured as follows: When the upper limit level detector detects hydraulic oil, the controller also controls the overflow valve to open.

[0012] Optionally, the backup subsystem further includes a lower limit alarm and an upper limit alarm, both of which are electrically connected to the controller; and the controller is configured as follows: When the lower limit liquid level detection element fails to detect hydraulic oil, the controller controls the lower limit alarm element to issue an alarm. When the upper limit level detection device detects hydraulic oil, the controller controls the upper limit alarm device to issue an alarm.

[0013] Optionally, the second oil tank is located close to the second hydraulic drive source, and the volume of the second oil tank is smaller than the volume of the first oil tank.

[0014] In the above technical solution, the first replenishing pump delivers hydraulic oil to the replenishing motor through the first replenishing pipeline. The replenishing motor rotates under the drive of the hydraulic oil. Since the output shaft of the replenishing motor is connected to the input shaft of the second replenishing pump, the second replenishing pump can draw oil from the first oil tank and deliver hydraulic oil to the second oil tank through the second replenishing pipeline. By utilizing the flow difference between the first and second replenishing pumps, the second oil tank can store a larger amount of oil. This second oil tank can be flexibly positioned near the second hydraulic drive source. The second hydraulic drive source can draw oil from the second oil tank and deliver hydraulic oil to the hydraulic actuators, avoiding the problems of poor oil intake, equipment damage, and hydraulic system failure caused by the second hydraulic drive source directly drawing oil from the first oil tank.

[0015] Secondly, the first oil replenishment pump drives the oil replenishment motor to rotate, which in turn drives the second oil replenishment pump to work, so as to replenish oil from the first oil tank to the second oil tank. Even if there is no power near the first oil tank, the normal operation of the oil replenishment motor and the second oil replenishment pump can be ensured by the drive of the first oil replenishment pump.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a hydraulic system suitable for long-distance oil supply according to one embodiment of the present disclosure.

[0018] Figure 2 This is a control flow diagram of a hydraulic system suitable for long-distance oil supply according to one embodiment of the present disclosure.

[0019] Explanation of reference numerals in the attached figures 1. Hydraulic subsystem; 11. First oil tank; 12. First hydraulic drive source; 13. Hydraulic actuator; 14. First oil suction line; 15. First oil outlet line; 2. Backup subsystem; 21. Second oil tank; 22. Second hydraulic drive source; 23. Oil replenishment unit; 231. First oil replenishment pump; 232. First oil replenishment pipeline; 233. Oil replenishment motor; 234. Second oil replenishment pump; 235. Second oil replenishment pipeline; 236. First valve component; 24. Second oil suction pipeline; 25. Second oil outlet pipeline; 251. Main oil outlet pipeline; 252. Second valve component; 253. Branch oil outlet pipeline. Detailed Implementation

[0020] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0021] Reference Figure 1 As shown, this disclosure provides a hydraulic system suitable for long-distance oil supply. The hydraulic system includes at least one hydraulic subsystem 1 and a backup subsystem 2. Hydraulic subsystem 1 includes a first oil tank 11, a first hydraulic drive source 12, and a hydraulic actuator 13. The first hydraulic drive source 12 is used to deliver hydraulic oil from the first oil tank 11 to the hydraulic actuator 13. Backup subsystem 2 includes a second oil tank 21, a second hydraulic drive source 22, and a replenishment unit 23. The second hydraulic drive source 22 is used to deliver hydraulic oil from the second oil tank 21 to the hydraulic actuator 13.

[0022] The oil replenishment unit 23 includes a first oil replenishment pump 231, at least one first oil replenishment pipeline 232, at least one oil replenishment motor 233, at least one second oil replenishment pump 234, and at least one second oil replenishment pipeline 235. The inlet of the first oil replenishment pump 231 is connected to the interior of the second oil tank 21. One end of the first oil replenishment pipeline 232 is connected to the outlet of the first oil replenishment pump 231, and the other end supplies hydraulic oil to the corresponding oil replenishment motor 233. The output shaft of the oil replenishment motor 233 is connected to the input shaft of the corresponding second oil replenishment pump 234. The inlet of the second oil replenishment pump 234 is connected to the interior of the first oil tank 11, and one end of the second oil replenishment pipeline 235 is connected to the outlet of the corresponding second oil replenishment pump 234, and the other end is connected to the interior of the second oil tank 21.

[0023] It should be noted that when the first hydraulic drive source 12 in hydraulic subsystem 1 fails and cannot operate normally, the backup subsystem 2 can be activated to operate, using the second hydraulic drive source 22 to draw oil and supply oil to the hydraulic actuator 13. However, due to limited space, the second hydraulic drive source 22 often cannot be placed close to the first oil tank 11, and there is a certain distance between the second hydraulic drive source 22 and the first oil tank 11. If the second hydraulic drive source 22 draws oil directly from the first oil tank 11, there is a risk of poor oil drawing by the second hydraulic drive source 22, equipment damage, or failure of the entire hydraulic system.

[0024] Based on this, the backup subsystem 2 also includes a second fuel tank 21 and a fuel replenishment unit 23. The fuel replenishment unit 23 includes a first fuel replenishment pump 231, at least one first fuel replenishment line 232, at least one fuel replenishment motor 233, at least one second fuel replenishment pump 234, and at least one second fuel replenishment line 235.

[0025] In the above technical solution, the first replenishing pump 231 delivers hydraulic oil to the replenishing motor 233 through the first replenishing pipeline 232. The replenishing motor 233 rotates under the drive of the hydraulic oil. Since the output shaft of the replenishing motor 233 is connected to the input shaft of the second replenishing pump 234, the second replenishing pump 234 can draw oil from the first oil tank 11 and deliver hydraulic oil to the second oil tank 21 through the second replenishing pipeline 235. By utilizing the flow difference between the first replenishing pump 231 and the second replenishing pump 234, the second oil tank 21 can store more oil. The second oil tank 21 can be flexibly set near the second hydraulic drive source 22. The second hydraulic drive source 22 can draw oil from the second oil tank 21 and deliver hydraulic oil to the hydraulic actuator 13, avoiding the problems of poor oil suction, equipment damage, and hydraulic system failure caused by the second hydraulic drive source 22 directly drawing oil from the first oil tank 11.

[0026] Secondly, the first oil replenishment pump 231 drives the oil replenishment motor 233 to rotate, which in turn drives the second oil replenishment pump 234 to work, so as to replenish oil from the first oil tank 11 to the second oil tank 21. Even if there is no power near the first oil tank 11, the normal operation of the oil replenishment motor 233 and the second oil replenishment pump 234 can be ensured by the drive of the first oil replenishment pump 231.

[0027] Furthermore, this disclosure does not limit the number of the aforementioned hydraulic subsystem 1; it may be one or more, and this disclosure does not impose any limitation on this.

[0028] Optionally, the second oil tank 21 is positioned close to the second hydraulic drive source 22, and the volume of the second oil tank 21 is smaller than the volume of the first oil tank 11. In this embodiment, the second oil tank 21 is positioned close to the second hydraulic drive source 22, so that when the second hydraulic drive source 22 starts working, the hydraulic oil in the second oil tank 21 can be quickly and effectively extracted, avoiding the "air evacuation" problem that occurs over long distances. In addition, the smaller volume of the second oil tank 21 reduces the floor space required, making it easier to arrange; secondly, the smaller capacity of the second oil tank 21 can serve as a transitional transmission unit, and under the action of the oil replenishment unit 23, it can effectively replenish the oil from the first oil tank 11 to the second oil tank 21, meeting the usage requirements.

[0029] In one embodiment, the first replenishing pump 231 is configured as a high-pressure, low-flow hydraulic pump, the second replenishing pump 234 is configured as a low-pressure, high-flow hydraulic pump, and the diameter of the first replenishing pipeline 232 is smaller than the diameter of the second replenishing pipeline 235.

[0030] In this embodiment, the core task of the first replenishing pump 231, configured as a high-pressure, low-flow hydraulic pump, is to provide sufficient pressure to drive the replenishing motor 233, rather than to deliver a large amount of hydraulic oil. The replenishing motor 233 requires a certain starting pressure and torque to rotate. The high-pressure, low-flow pump can generate high pressure for effective driving. It can draw a small amount of hydraulic oil from the second oil tank 21 to establish the high pressure required to drive the replenishing motor 233.

[0031] The core task of the second replenishing pump 234, which is constructed as a low-pressure, high-flow hydraulic pump, is to efficiently pump a large amount of hydraulic oil from the first oil tank 11 to the second oil tank 21. This is a simple transfer task, which does not require high output pressure, but requires high flow rate for rapid replenishment. The low-pressure, high-flow pump is the most efficient and economical choice to accomplish this task.

[0032] In summary, it achieves "high flow rate transmission with low power drive". The power source of the entire oil replenishment unit 23 is actually the first oil replenishment pump 231, but it drives the oil replenishment motor 233, which in turn drives a second oil replenishment pump 234 with a high flow rate. With a relatively small input, a large output flow rate is obtained, resulting in high oil replenishment efficiency.

[0033] In addition, the smaller diameter first replenishment line 232 delivers high-pressure, low-flow-rate oil. The smaller diameter is sufficient to meet the low-flow-rate requirements, and due to its high pressure resistance, a thicker pipe wall is required. The smaller diameter saves space, weight, and material costs. The larger diameter second replenishment line 235 delivers low-pressure, high-flow-rate oil. The larger diameter significantly reduces the resistance to oil flow.

[0034] Optionally, refer to Figure 1As shown, the oil replenishment unit 23 also includes a first valve component 236, which includes a first valve inlet and at least one first valve outlet. The first valve inlet is connected to the outlet of the first oil replenishment pump 231, and the first valve outlet is connected to the corresponding first oil replenishment pipeline 232.

[0035] In this embodiment, since the hydraulic subsystem 1 is configured as at least one, the hydraulic oil flowing from the first replenishing pump 231 can be effectively distributed by providing the first valve component 236. It can also effectively control the flow rate of each first replenishing line 232 to meet the different flow rate requirements of different first replenishing lines 232. The first valve component 236 can be constructed as any suitable valve structure; for example, it can be constructed as a solenoid directional valve, a manual on / off valve, or a proportional valve. This disclosure does not limit the specific structural type of the first valve component 236.

[0036] In other implementations, refer to Figure 1 As shown, the backup subsystem 2 also includes a second oil suction line 24 and a second oil outlet line 25. One end of the second oil suction line 24 is connected to the interior of the second oil tank 21, and the other end is connected to the inlet of the second hydraulic drive source 22. The second hydraulic drive source 22 supplies hydraulic oil to at least one hydraulic actuator 13 in at least one hydraulic subsystem 1 through the second oil outlet line 25.

[0037] In this embodiment, the second hydraulic drive source 22 draws oil directly from the second oil tank 21 via the second oil suction line 24, instead of drawing oil from the first oil tank 11 of the hydraulic subsystem 1. The hydraulic oil generated by the second hydraulic drive source 22 is directly delivered to the hydraulic actuator 13 via the second oil discharge line 25.

[0038] The design of the second suction line 24 minimizes flow resistance, providing sufficient hydraulic oil supply to the second hydraulic drive source 22 and preventing cavitation. The design of the second discharge line 25 aims to minimize pressure loss, ensuring that backup power can be efficiently transmitted to the hydraulic actuator 13 without power loss due to pipeline bottlenecks, thereby guaranteeing that the hydraulic actuator 13 can obtain the required force and speed even in standby mode.

[0039] In some embodiments, refer to Figure 1As shown, the hydraulic subsystem 1 is configured with at least two components. The second oil outlet pipeline 25 includes a main oil outlet pipeline 251, a second valve component 252, and at least two branch oil outlet pipelines 253. The second valve component 252 includes a second valve inlet and at least two second valve outlets. One end of the main oil outlet pipeline 251 is connected to the outlet of the second hydraulic drive source 22, and the other end is connected to the second valve inlet of the second valve component 252. One end of the branch oil outlet pipeline 253 is connected to the corresponding second valve outlet, and the other end is connected to the corresponding hydraulic actuator 13.

[0040] In this embodiment, when one of the hydraulic subsystems 1 experiences a leakage fault, it can be shut off by the second valve component 252 to ensure that the backup subsystem 2 can supply oil to other hydraulic subsystems 1 normally. Furthermore, the hydraulic oil flowing from the second hydraulic drive source 22 can be effectively distributed, and the flow rate of each oil outlet branch pipe 253 can be effectively controlled to meet the different flow rate requirements of different oil outlet branch pipes 253. The second valve component 252 can be constructed as any suitable valve structure; for example, it can be constructed as a solenoid directional valve, a manual on / off valve, or a proportional valve. This disclosure does not limit the specific structural type of the second valve component 252.

[0041] Optionally, the diameter of the second suction line 24 is larger than the diameter of the second outlet line 25. The suction process of the second hydraulic drive source 22 relies on the vacuum generated inside the pump, using atmospheric pressure to force the oil into the pump. If the suction resistance is too high, causing the absolute pressure at the pump inlet to be lower than the air separation pressure of the oil, air in the oil will precipitate and generate bubbles. These bubbles will burst instantly after entering the high-pressure zone with the oil, generating a huge impact force, leading to corrosion damage to the pump's internal components, and producing noise and vibration. By providing a second suction line 24 with a larger diameter, the second hydraulic drive source 22 can obtain a smooth and sufficient supply of hydraulic oil, minimizing the problem of cavitation. In addition, the smaller diameter of the second outlet line 25 can meet the long-distance transportation of high-pressure hydraulic oil.

[0042] Optionally, the hydraulic subsystem 1 described above further includes a first oil suction line 14 and a first oil discharge line 15. The first oil suction line 14 connects the first oil tank 11 and the first hydraulic drive source 12, and the first hydraulic drive source 12 and the hydraulic actuator 13 are connected through the first oil discharge line 15. The diameter of the first oil suction line 14 may be larger than the diameter of the first oil discharge line 15.

[0043] In this embodiment, the oil suction process of the first hydraulic drive source 12 relies on the vacuum generated inside the pump, using atmospheric pressure to force oil into the pump. If the suction resistance is too high, causing the absolute pressure at the pump inlet to be lower than the air separation pressure of the oil, air in the oil will precipitate and generate bubbles. These bubbles will burst instantly after entering the high-pressure zone with the oil, generating a huge impact force, leading to corrosion damage to the pump's internal components, and producing noise and vibration. By providing a first suction line 14 with a larger diameter, the first hydraulic drive source 12 can obtain a smooth and sufficient supply of hydraulic oil, minimizing the problem of cavitation. In addition, the second outlet line 15 with a smaller diameter can meet the long-distance transportation of high-pressure hydraulic oil.

[0044] Optionally, the first hydraulic drive source 12 and the second hydraulic drive source 22 described above can both be configured as hydraulic pumps, and the hydraulic actuator 13 described above can be configured as a hydraulic motor, but this disclosure does not limit the specific types.

[0045] Optionally, the backup subsystem 2 includes a lower limit liquid level detector, an upper limit liquid level detector, and a controller; the lower limit liquid level detector is located at the lower part of the second oil tank 21, and the upper limit liquid level detector is located at the upper part of the second oil tank 21; the lower limit liquid level detector, the upper limit liquid level detector, the second hydraulic drive source 22, and the first replenishing pump 231 are all electrically connected to the controller; wherein, the controller is configured such that: when the lower limit liquid level detector does not detect hydraulic oil, the controller controls the first replenishing pump 231 to work and controls the second hydraulic drive source 22 to stop working; when the upper limit liquid level detector detects hydraulic oil, the controller controls the first replenishing pump 231 and the second hydraulic drive source 22 to stop working.

[0046] In other words, by setting the upper limit liquid level detection device and the lower limit liquid level detection device mentioned above, the problem of too much or too little hydraulic oil in the second oil tank 21 can be effectively avoided, and the amount of hydraulic oil in the second oil tank 21 can be automatically monitored, automatically replenished or automatically discharged.

[0047] Optionally, the second oil tank 21 is provided with an overflow port, and the overflow port is provided with an overflow valve. The overflow valve is electrically connected to the controller, and the controller is configured such that when the upper limit liquid level detection element detects hydraulic oil, the controller also controls the overflow valve to open, so as to avoid the problem of leakage due to excessive liquid in the second oil tank 21.

[0048] Additionally, the backup subsystem 2 may include a lower limit alarm and an upper limit alarm, both electrically connected to the controller. The controller is configured such that when the lower limit level sensor does not detect hydraulic oil, the controller activates the lower limit alarm; and when the upper limit level sensor detects hydraulic oil, the controller activates the upper limit alarm. This serves to alert personnel and enhance safety. The lower and upper limit alarms may be configured as buzzers and / or warning lights; this disclosure does not limit their configuration.

[0049] Specifically, refer to Figure 1 and Figure 2 As shown, the second oil tank 21 can be equipped with five liquid level switches: K0, K1, K10, K2, and K20. K0 is the normal oil level signal, normally open; it can be installed at the middle position of the second oil tank (21mm height). It is a switch to toggle between oil replenishment and oil draining.

[0050] K1 is the low oil level alarm signal, normally closed; it can be installed near the bottom of the second oil tank 21. When the oil level falls below this position, the alarm light is triggered, outputting an audible and visual signal to begin refueling.

[0051] K10 is the lower oil level stop signal, normally closed; it is installed at the bottom of the second oil tank 21. When the oil level falls below this position, the stop signal is triggered.

[0052] K2 is the upper limit oil level alarm signal, normally open; it is installed near the top of the second oil tank 21. When the oil level exceeds this position, the alarm light is triggered, outputting an audible and visual signal.

[0053] K20 is the oil level upper limit stop signal, normally open; it is installed at the top of the second oil tank 21. When the oil level exceeds this position, the stop signal is triggered.

[0054] 1) When the oil level H in the second oil tank 21 is between K1 and k2, it is in the normal liquid level state.

[0055] 2) When the liquid level gradually drops below K1, K1 closes and outputs a lower limit alarm signal, and at the same time triggers the oil replenishment switch to add hydraulic oil to the second oil tank 21.

[0056] 3) If the oil replenishment rate is less than the system's oil suction rate, causing the liquid level to gradually drop below K10, K10 will close and output a stop signal, and the hydraulic system will stop operating.

[0057] 4) If the oil replenishment rate is greater than the system's oil suction rate, causing the liquid level to gradually rise above K2, K2 will close and output an upper limit alarm signal, and at the same time trigger the oil drain switch to discharge hydraulic oil from the second oil tank 21.

[0058] 5) If the oil discharge speed is less than the system's oil suction speed, causing the liquid level to gradually rise above K20, K20 will close and output a stop signal, and the hydraulic system will stop operating.

[0059] 6) If the oil discharge rate is greater than the system's oil suction rate, causing the liquid level to gradually drop below K2, it will enter the normal liquid level state between K1 and K2.

[0060] 7) If the level of the second oil tank 21 continues to drop, repeat step 2).

[0061] 8) If the level in the second oil tank 21 continues to rise, repeat step 4).

[0062] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0063] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0064] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A hydraulic system suitable for long-distance oil supply, characterized in that, The hydraulic system suitable for long-distance oil supply includes at least one hydraulic subsystem and a backup subsystem; The hydraulic subsystem includes a first oil tank, a first hydraulic drive source, and a hydraulic actuator. The first hydraulic drive source is used to deliver hydraulic oil from the first oil tank to the hydraulic actuator. The backup subsystem includes a second oil tank, a second hydraulic drive source, and an oil replenishment unit. The second hydraulic drive source is used to deliver hydraulic oil from the second oil tank to the hydraulic actuator. The oil replenishment unit includes a first oil replenishment pump, at least one first oil replenishment line, at least one oil replenishment motor, at least one second oil replenishment pump, and at least one second oil replenishment line; The inlet of the first replenishing pump is connected to the interior of the second oil tank; One end of the first replenishing oil line is connected to the outlet of the first replenishing oil pump, and the other end supplies hydraulic oil to the corresponding replenishing oil motor; The output shaft of the oil replenishment motor is connected to the input shaft of the corresponding second oil replenishment pump; The inlet of the second replenishing pump is connected to the inside of the first oil tank, one end of the second replenishing pipeline is connected to the outlet of the corresponding second replenishing pump, and the other end is connected to the inside of the second oil tank.

2. The hydraulic system suitable for long-distance oil supply according to claim 1, characterized in that, The first replenishing pump is a high-pressure, low-flow hydraulic pump, and the second replenishing pump is a low-pressure, high-flow hydraulic pump. The diameter of the first replenishing pipeline is smaller than the diameter of the second replenishing pipeline.

3. The hydraulic system suitable for long-distance oil supply according to claim 1, characterized in that, The oil replenishment unit further includes a first valve component, which includes a first valve inlet and at least one first valve outlet. The first valve inlet is connected to the outlet of the first oil replenishment pump, and the first valve outlet is connected to the corresponding first oil replenishment pipeline.

4. The hydraulic system suitable for long-distance oil supply according to any one of claims 1-3, characterized in that, The backup subsystem also includes a second oil suction line and a second oil outlet line. One end of the second oil suction pipe is connected to the inside of the second oil tank, and the other end is connected to the inlet of the second hydraulic drive source; The second hydraulic drive source supplies hydraulic oil to at least one of the hydraulic actuators in at least one of the hydraulic subsystems via the second oil outlet line.

5. The hydraulic system suitable for long-distance oil supply according to claim 4, characterized in that, The hydraulic subsystem is configured to have at least two subsystems, and the second oil outlet pipeline includes a main oil outlet pipeline, a second valve component, and at least two oil outlet branch pipelines. The second valve component includes a second valve inlet and at least two second valve outlets; One end of the main oil outlet pipeline is connected to the outlet of the second hydraulic drive source, and the other end is connected to the second valve inlet of the second valve component; One end of the oil outlet branch pipeline is connected to the corresponding outlet of the second valve, and the other end is connected to the corresponding hydraulic actuator.

6. The hydraulic system suitable for long-distance oil supply according to claim 4, characterized in that, The diameter of the second oil suction pipe is larger than the diameter of the second oil outlet pipe.

7. A hydraulic system suitable for long-distance oil supply according to any one of claims 1-3, characterized in that, The backup subsystem also includes a lower limit liquid level detector, an upper limit liquid level detector, and a controller; The lower limit liquid level detection device is located at the lower part of the second oil tank, and the upper limit liquid level detection device is located at the upper part of the second oil tank. The lower limit liquid level detector, the upper limit liquid level detector, the second hydraulic drive source, and the first replenishing pump are all electrically connected to the controller; wherein, the controller is configured as follows: When the lower limit liquid level detection device does not detect hydraulic oil, the controller controls the first oil replenishment pump to work and controls the second hydraulic drive source to stop working; When the upper limit liquid level detection device detects hydraulic oil, the controller controls the first replenishing pump and the second hydraulic drive source to stop working.

8. The hydraulic system for long-distance oil supply according to claim 7, characterized in that, The second oil tank has an overflow outlet, and the overflow outlet is equipped with an overflow valve. The overflow valve is electrically connected to the controller, and the controller is configured as follows: When the upper limit level detector detects hydraulic oil, the controller also controls the overflow valve to open.

9. The hydraulic system for long-distance oil supply according to claim 7, characterized in that, The backup subsystem further includes a lower limit alarm and an upper limit alarm, both of which are electrically connected to the controller; and the controller is configured as follows: When the lower limit liquid level detection element fails to detect hydraulic oil, the controller controls the lower limit alarm element to issue an alarm. When the upper limit level detection device detects hydraulic oil, the controller controls the upper limit alarm device to issue an alarm.

10. A hydraulic system suitable for long-distance oil supply according to any one of claims 1-3, characterized in that, The second oil tank is located close to the second hydraulic drive source, and the volume of the second oil tank is smaller than the volume of the first oil tank.

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