Hydraulic system suitable for single-blade lifting appliance

Abstract

The invention relates to the technical field of wind power generation, and provides a hydraulic system suitable for a single-blade lifting appliance. Comprising a housing, and an oil tank assembly, an oil supply motor pump set, an emergency oil supply motor pump set, a main control valve set, a reversing valve set, a turning balance valve set, a blade tip clamping balance valve set, a blade root clamping balance valve set, an energy accumulator mounting valve set and a wiring terminal box set which are arranged in the housing, the blade tip clamping balance valve group controls a blade tip clamping oil cylinder of an offshore lifting appliance, the blade root clamping balance valve group controls a blade root clamping oil cylinder of an offshore lifting appliance system, and the hydraulic system can work for a long time in a severe environment, is high in reliability, can provide safer and more stable power and is easy to operate and maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a hydraulic system suitable for a single-blade spreader, and in particular to a hydraulic system suitable for an offshore clamp-type single-blade spreader. Background Art

[0002] As the global demand for wind power continues to increase, offshore wind power has developed rapidly as one of the energy sources.

[0003] As the scale of offshore wind farms continues to expand, the size and weight of wind turbine blades also increase. Since wind turbine blades are long and irregular in shape, they are difficult to transport and install. For this reason, the stable and reliable transportation and installation of wind turbine blades has become a key research area in the wind power industry.

[0004] Existing blade hoists can only perform some simple operations. The traditional rope hoist structure is relatively simple, but it is easy to damage the blades due to excessive local force, and it is difficult to accurately control the posture of the blades, and the stability is poor in complex environments. The mechanical clamp hoist fixes the blades through the clamping arm of the mechanical structure, with a certain degree of adaptive adjustment, and the clamping force is relatively uniform, which can better protect the blades, but it requires a safer and more stable power system support. Therefore, it is urgent to design a power system that can work for a long time in harsh environments, has high reliability, higher safety, and more stability to solve the shortcomings of the existing technology. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a hydraulic system suitable for a single-blade spreader.

[0006] A hydraulic system suitable for a single-blade spreader provided in accordance with the present invention comprises an oil tank assembly, an oil supply motor pump group, an emergency oil supply motor pump group, a main control valve group, a reversing valve group, a turning balance valve group, a blade tip clamping balance valve group, a blade root clamping balance valve group, an accumulator installation valve group, a terminal box group and a cover; The interior of the cover shell has a accommodating space, and the oil tank assembly, oil supply motor pump group, emergency oil supply motor pump group, main control valve group, reversing valve group, turning balance valve group, blade tip clamping balance valve group, blade root clamping balance valve group, accumulator installation valve group, and terminal box group are all arranged in the accommodating space.

[0007] Preferably, the fuel tank assembly includes a fuel tank, an air filter, an air cooler, a float type liquid level sensor and a temperature sensor arranged inside the fuel tank, and a liquid level gauge and a heater arranged on the side wall of the fuel tank; The air filter is arranged on the top of the oil tank, and the air cooler is arranged above the oil tank. The air cooler is used to cool the hydraulic oil returning to the oil tank.

[0008] Preferably, the oil supply motor pump group includes a first motor, a first gear pump and a first coupling assembly, the first motor is drivingly connected to the first gear pump through the first coupling assembly, the inlet of the first gear pump is connected to the oil tank assembly, and the outlet of the first gear pump is connected to the main control valve group through the first oil pipe; The emergency oil supply motor pump group includes a second motor, a second gear pump and a second coupling assembly. The second motor is drivingly connected to the second gear pump through the second coupling assembly. The inlet of the second gear pump is connected to the oil tank assembly, and the outlet of the second gear pump is connected to the main control valve group through a third oil pipe.

[0009] Preferably, the main control valve group includes a first pressure sensor, a first pressure gauge, a second pressure sensor, a second pressure gauge, a first filter, a second filter, a first filter assembly, a second filter assembly, a third filter assembly, a first check valve, a second check valve, a third check valve, a first reversing valve, a second reversing valve, a first stop valve, a first relief valve, a second relief valve, a third relief valve, a high-pressure ball valve and a first accumulator; The first filter is arranged on the first oil pipe, and the inlet is connected to the first one-way valve, and the outlet is connected to the second one-way valve. The first filter assembly, the second filter assembly, and the third filter assembly are arranged in parallel; The front ends of the first filter assembly, the second filter assembly, and the third filter assembly are connected to the oil supply motor pump group through the first oil pipe, connected to the emergency oil supply motor pump group through the second oil pipe, and the rear ends are connected to the seventh oil pipe, the seventh oil pipe is provided with a third one-way valve, and the end of the seventh oil pipe is connected to the high-pressure ball valve and the first accumulator in sequence, and the first accumulator is located at the outlet of the second one-way valve; The second oil pipe is an oil return pipe, which is connected to the inlet of the first filter through the first overflow valve and to the outlet of the first filter through the first reversing valve. The third oil pipe is connected to the second oil pipe through the sixth oil pipe. The sixth oil pipe is provided with a second reversing valve and a third overflow valve arranged in parallel. Both ends of the second filter are respectively connected to an air cooler and an oil tank assembly, and the air cooler is arranged on the second oil pipe.

[0010] Preferably, the main control valve group is connected to the reversing valve group through an eighth oil pipe, the reversing valve group includes a first sub-valve group, a second sub-valve group and a third sub-valve group, the first sub-valve group, the second sub-valve group and the third sub-valve group are arranged in parallel and the oil inlet ends are all connected to the eighth oil pipe, the oil outlet end of the first sub-valve group is connected to the turning balance valve group through oil outlets A1 and B1, the oil outlet end of the second sub-valve group is connected to the blade tip clamping balance valve group through oil outlets A2 and B2, the oil outlet end of the third sub-valve group is connected to the blade root clamping balance valve group through oil outlets A3 and B3, and the first sub-valve group, the second sub-valve group and the third sub-valve group are all connected to the second oil pipe through the fifth oil pipe; The working oil ports A1, A2, A3, B1, B2, and B3 concentrate all the oil ports on the turning balance valve group, the blade tip clamping balance valve group, and the blade root clamping balance valve group to the same position and the interface structures are consistent.

[0011] Preferably, the first sub-valve group includes a fourth one-way valve, a third solenoid reversing valve, a first hydraulically controlled one-way valve and a first one-way throttle valve, and the oil from the eighth oil pipe enters the first hydraulically controlled one-way valve and the first one-way throttle valve in sequence through the third solenoid reversing valve, and the hydraulic oil passing through the third solenoid reversing valve can also be redirected to flow through the fourth one-way valve; The second sub-valve group includes a fifth check valve, a first pressure reducing valve, a fourth solenoid reversing valve, a second hydraulically controlled check valve and a second check throttle valve. The oil from the eighth oil pipe enters the fourth solenoid reversing valve, the second hydraulically controlled check valve and the second check throttle valve in sequence through the first pressure reducing valve. The hydraulic oil passing through the fourth solenoid reversing valve can also be redirected to flow through the fifth check valve. The third sub-valve group includes a sixth one-way valve, a fifth solenoid reversing valve, a third hydraulically controlled one-way valve, a third one-way throttle valve and a second pressure reducing valve. The oil from the eighth oil pipe enters the fifth solenoid reversing valve, the third hydraulically controlled one-way valve and the third one-way throttle valve in sequence through the second pressure reducing valve. The hydraulic oil passing through the fifth solenoid reversing valve can also be redirected to flow through the sixth one-way valve.

[0012] The reversing valve group also includes a seventh one-way valve, and the oil from the eighth oil pipe can also directly enter the blade tip clamping balance valve group or the blade root clamping balance valve group through the seventh one-way valve.

[0013] Preferably, the wiring terminal box group connects the wiring harnesses of all electrical components on the main control valve group, the reversing valve group, the turning balance valve group, the blade tip clamping balance valve group, and the blade root clamping balance valve group to the terminals in the terminal box, serving as the external electrical interface of the hydraulic system, and all the wiring harness shielding layers are connected to the terminal box; It also includes a DC motor pump group as a spare motor pump group, and two ends of the DC motor pump group are respectively connected to the oil tank assembly and the main control valve group.

[0014] Preferably, the turning gear balancing valve group includes a third pressure sensor, a fourth pressure sensor, a first balancing valve and a second balancing valve; Both ends of the first balancing valve and the second balancing valve are connected to the oil outlets A1 and B1 of the reversing valve group and the oil inlet of the turning cylinder respectively. The third pressure sensor and the fourth pressure sensor are respectively arranged on the outlets of the first balancing valve and the second balancing valve.

[0015] Preferably, the blade tip clamping balance valve group includes a fifth pressure sensor, a sixth pressure sensor, a third balance valve, a fourth balance valve, a sixth electromagnetic reversing valve, a seventh electromagnetic reversing valve and a fourth accumulator; The two ends of the third balancing valve and the fourth balancing valve are respectively connected to the oil outlets A2 and B2 of the reversing valve group and the oil inlet of the blade tip clamping cylinder. The sixth electromagnetic reversing valve, the fifth pressure sensor and the fourth accumulator are all arranged at the outlet of the third balancing valve. The seventh electromagnetic reversing valve and the sixth pressure sensor are both arranged at the outlet of the fourth balancing valve. The accumulator is connected to the valve group via the sixth electromagnetic reversing valve.

[0016] Preferably, the blade root clamping balance valve group includes a seventh pressure sensor, an eighth pressure sensor, a fifth balance valve, a sixth balance valve, an eighth electromagnetic reversing valve, a ninth electromagnetic reversing valve and a fifth accumulator; The two ends of the fifth and sixth balancing valves are respectively connected to the oil outlets A3 and B3 of the reversing valve group and the oil inlet of the blade root clamping cylinder. The eighth electromagnetic reversing valve, the seventh pressure sensor and the fifth accumulator are all arranged at the outlet of the fifth balancing valve. The ninth electromagnetic reversing valve and the eighth pressure sensor are both arranged at the outlet of the sixth balancing valve. The accumulator is installed with a valve group connected via the eighth electromagnetic reversing valve.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention integrates a turning balance valve group, a blade tip clamping balance valve group, and a blade root clamping balance valve group into a system, and through the coordination of an oil tank assembly, an oil supply motor pump group, an emergency oil supply motor pump group, a main control valve group, a reversing valve group, and an accumulator installation valve group, the turning actuator, the blade tip clamping actuator, and the blade root clamping actuator can complete the action more accurately, conveniently, and stably, and can work for a long time in harsh environments, and can provide safer and more stable power, and has the characteristics of easy operation and maintenance, which greatly improves the reliability and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a three-dimensional structural schematic diagram of a hydraulic system suitable for a single-blade spreader.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the hydraulic system suitable for single-blade spreader after the cover is removed.

[0020] Figure 3 It is a schematic diagram of the main structure of the hydraulic system suitable for single-blade spreaders.

[0021] Figure 4 It is a schematic diagram of the main control valve group structure suitable for the hydraulic system of a single-blade spreader.

[0022] Figure 5 The diagram is a schematic diagram of the structure of the reversing valve group of the hydraulic system suitable for single-blade spreaders.

[0023] Figure 6 This is a structural diagram of the turning balance valve group; Figure 7 This is a schematic diagram of the structure of the blade root clamping balance valve group; Figure 8 The schematic diagram is a principle diagram of a hydraulic system for a single-blade spreader in use, wherein some components are omitted.

[0024] The figure shows: First oil pipe 001; The second oil pipe 002; The third oil pipe 003; Fourth oil pipe 004; Fifth oil pipe 005; The sixth oil pipe 006; Seventh Oil Pipeline 007; The eighth oil pipe 008; Terminal box group 30; Fuel tank assembly 101; Fuel tank 1; Liquid level gauge 2; Air filter 3; Observation window 7; Air cooler 9; Float type liquid level sensor 10; Temperature sensor 11; Heater 12; Oil supply motor pump group 102; A first motor 5; The first gear pump 6; A first coupling assembly 37; Emergency oil supply motor pump group 103; A second motor 25; A second gear pump 38; A second coupling assembly 39; Main control valve group 104; A first filter 15; A first reversing valve 16; A second reversing valve 18; A first stop valve 19; High pressure ball valve 24; A second filter 40; A first filter assembly 41; A second filter assembly 42; A third filter assembly 43; A first one-way valve 141; A second one-way valve 142; A third one-way valve 143; A first relief valve 171; A second relief valve 172; A third relief valve 173; A first pressure sensor 201; A second pressure sensor 202; A first pressure gauge 211; A second pressure gauge 212; A first accumulator 231; Reversing valve group 105; A fourth one-way valve 144; A fifth one-way valve 145; A sixth one-way valve 146; A third electromagnetic reversing valve 261; Fourth electromagnetic reversing valve 262; Fifth electromagnetic reversing valve 263; A first hydraulically controlled one-way valve 271; A second hydraulically controlled one-way valve 272; A third hydraulically controlled one-way valve 273; A first one-way throttle valve 281; A second one-way throttle valve 282; A third one-way throttle valve 283; A first pressure reducing valve 291; and a second pressure reducing valve 292; Turning balance valve group 106; A third pressure sensor 203; A fourth pressure sensor 204; A first balancing valve 311; A second balancing valve 312; Blade tip clamping balance valve group 107; A fifth pressure sensor 205; A sixth pressure sensor 206; A third balancing valve 313; A fourth balancing valve 314; Sixth electromagnetic reversing valve 321; A seventh electromagnetic reversing valve 322; fourth accumulator 341; Blade root clamping balance valve group 108; A seventh pressure sensor 207; an eighth pressure sensor 208; A fifth balancing valve 315; Sixth balancing valve 316; Eighth electromagnetic reversing valve 323; Ninth electromagnetic reversing valve 324; fifth accumulator 342; Accumulator installation valve group 109; The housing 110 . DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0026] like Figures 1 to 8 As shown, the present invention provides a hydraulic system suitable for a single-blade hanger, comprising an oil tank assembly 101, an oil supply motor pump group 102, an emergency oil supply motor pump group 103, a main control valve group 104, a reversing valve group 105, a turning balance valve group 106, a blade tip clamping balance valve group 107, a blade root clamping balance valve group 108, an accumulator installation valve group 109, a terminal box group 30, and a cover 110. The cover 110 has an accommodating space inside, and the oil tank assembly 101, the oil supply motor pump group 102, the emergency oil supply motor pump group 103, the main control valve group 104, the reversing valve group 105, the turning balance valve group 106, the blade tip clamping balance valve group 107, the blade root clamping balance valve group 108, the accumulator installation valve group 109, and the terminal box group 30 are all arranged in the accommodating space. The entire hydraulic system of the present invention is provided with a cover 110 outside to protect the components inside the hydraulic system and ensure the safety and stability of the hydraulic system in a harsh environment.

[0027] like Figure 2 , Figure 8As shown, the oil tank assembly 101 is used to store the hydraulic oil of the working medium of the hydraulic unit, and can also be used to collect the hydraulic oil flowing out during disassembly and maintenance. The oil tank assembly 101 includes an oil tank 1, a liquid level gauge 2 arranged on the side wall of the oil tank 1, an air filter 3, an air cooler 9, a float type liquid level sensor 10 arranged inside the oil tank 1, a temperature sensor 11, a heater 12 and an observation window 7 arranged on the top of the oil tank 1. The liquid level gauge 2 is connected to the oil tank 1, and the on-site staff can intuitively see the height of the oil in the oil tank 1 through the liquid level gauge 2. The float type liquid level sensor 10 can detect the liquid level of the oil tank 1, realize remote monitoring, and improve the safety and stability of the hydraulic system. The top of the oil tank assembly 101 is provided with an air filter 3, and the air filter 3 is connected to the inside of the oil tank assembly 101. The air filter 3 is used to realize the entry of gas into the oil tank assembly 101, effectively preventing larger particles from entering the oil, and ensuring the safety of the hydraulic system suitable for single-blade spreaders.

[0028] Furthermore, a heater 12 is provided on the side wall of the oil tank assembly 101, and the heater 12 is inserted into the interior of the oil tank assembly 101; the oil tank assembly 101 is provided with an air cooler 9, and the air cooler 9 is installed and fixed above the oil tank 1. The hydraulic oil in the oil tank is heated by the heater 12, and the hydraulic oil returning to the oil tank is cooled by the air cooler 9, so as to maintain the oil temperature in a suitable working range and ensure the stability of the oil performance. At the same time, an oil drain valve 13 is also provided at the bottom of the oil tank 1, and the hydraulic oil in the oil tank 1 can be regularly drained according to actual conditions to replace the hydraulic oil.

[0029] The oil supply motor pump group 102 includes a first motor 5, a first gear pump 6 and a first coupling assembly 37. The first motor 5 is drivingly connected to the first gear pump 6 through the first coupling assembly 37. The inlet of the first gear pump 6 is connected to the oil tank 1, and the outlet of the first gear pump 6 is connected to the main control valve group 104 through the first oil pipe 001.

[0030] The emergency oil supply motor pump group 103 includes a second motor 25, a second gear pump 38 and a second coupling assembly 39. The second motor 25 is driven and connected to the second gear pump 38 through the second coupling assembly 39. The inlet of the second gear pump 38 is connected to the oil tank 1, and the outlet of the second gear pump 38 is connected to the main control valve group 104 through the third oil pipe 003.

[0031] like Figure 4 , Figure 8As shown, the main control valve group 104 includes a first pressure sensor 201, a first pressure gauge 211, a second pressure sensor 202, a second pressure gauge 212, a first filter 15, a second filter 40, a first filter assembly 41, a second filter assembly 42, a third filter assembly 43, a first check valve 141, a second check valve 142, a third check valve 143, a first reversing valve 16, a second reversing valve 18, a first stop valve 19, a first relief valve 171, a second relief valve 172, a third relief valve 173, a high-pressure ball valve 24 and a first accumulator 231. The first filter 15 is arranged on the first oil pipe 001, and the inlet is connected to the first check valve 141, and the outlet is connected to the second check valve 142. The first filter assembly 41, the second filter assembly 42, and the third filter assembly 43 are arranged in parallel, and the front ends of the first filter assembly 41, the second filter assembly 42, and the third filter assembly 43 are connected to the first oil pipe. 001 is connected to the oil supply motor pump group 102, connected to the emergency oil supply motor pump group 103 through the second oil pipe 002, and the rear end is connected to the seventh oil pipe 007, the seventh oil pipe 007 is provided with a third one-way valve 143, and the end of the seventh oil pipe 007 is connected to the high-pressure ball valve 24 and the first accumulator 231 in sequence. The first accumulator 231 is located at the outlet of the second one-way valve 142, which effectively prevents the first accumulator 231 from flowing back to the oil tank assembly 101; the second oil pipe 002 is The oil return line, the second oil pipe 002 is connected to the inlet of the first filter 15 through the first relief valve 171, and is connected to the outlet of the first filter 15 through the first reversing valve 16. The third oil pipe 003 is connected to the second oil pipe 002 through the sixth oil pipe 006. The second reversing valve 18 and the third relief valve 173 are arranged in parallel on the sixth oil pipe 006. The two ends of the second filter 40 are respectively connected to the air cooler 9 and the oil tank 1. The present invention ensures the cleanliness of the system oil through multiple filter components. The filter can effectively prevent large-diameter solid particles from entering the working oil circuit and the actuator to cause oil circuit blockage or valve jamming and other faults, thereby ensuring the safety of the hydraulic system and extending the service life.

[0032] Furthermore, the main control valve group 104 can filter the oil in the hydraulic unit through the first filter 15, the second filter 40, the first filter assembly 41, the second filter assembly 42, and the third filter assembly 43, and has the function of filter blockage alarm feedback. The sixth oil pipe 006 between the first filter 15 and the third filter assembly 43 is connected to the first pressure sensor 201 and the first pressure gauge 211, and the second pressure sensor 202 and the second pressure gauge 211 are connected to the inlet of the second filter assembly 42 on the third oil pipe 003. The pressure gauge 212 provides pressure feedback of the hydraulic unit through the first pressure gauge 211, the second pressure gauge 212, the first pressure sensor 201, and the second pressure sensor 202. The first one-way valve 141, the second one-way valve 142, and the third one-way valve 143 can prevent the pressure oil from flowing back. The first stop valve 19, the first reversing valve 16, and the second reversing valve 18 can release the pressure oil inside the system. The first overflow valve 171, the second overflow valve 172, and the third overflow valve 173 can provide the highest system pressure safety protection. The high-pressure ball valve 24 can control the oil inlet and outlet of the first accumulator 231. The first accumulator 231 can provide emergency energy storage and oil replenishment for the hydraulic unit. The first accumulator 231 is connected to the working oil circuit. When the oil supply motor pump group 102 is running, when the hydraulic system increases in pressure instantly, that is, the oil pressure in the working oil circuit increases instantly, the first accumulator 231 can absorb part of the oil to ensure the stability and normality of the hydraulic system. When the oil supply motor pump group 102 is powered off, the first accumulator 231 can provide pressure oil for the control circuits of the turning system, blade tip clamping system, and blade root clamping system. The main control valve group 104 serves as the main system oil supply circuit, first supplies hydraulic oil to the reversing valve group 105, and then supplies pressure oil to the turning balance valve group 106, blade tip clamping balance valve group 107, and blade root clamping balance valve group 108, respectively. The operation is simple and convenient, and easy to maintain.

[0033] like Figure 8As shown, the main control valve group 104 is connected to the reversing valve group 105 through the eighth oil pipe 008, and the reversing valve group 105 includes a first sub-valve group, a second sub-valve group and a third sub-valve group. The first sub-valve group, the second sub-valve group and the third sub-valve group are arranged in parallel and the oil inlet ends are all connected to the eighth oil pipe 008, the oil outlet end of the first sub-valve group is connected to the turning balance valve group 106 through the oil outlets A1 and B1, the oil outlet end of the second sub-valve group is connected to the blade tip clamping balance valve group 107 through the oil outlets A2 and B2, the oil outlet end of the third sub-valve group is connected to the blade root clamping balance valve group 108 through the oil outlets A3 and B3, and the first sub-valve group, the second sub-valve group and the third sub-valve group are all connected to the second oil pipe 002 through the fifth oil pipe 005, so that the return oil in the valve group can flow back to the oil tank 1. The present invention concentrates all the oil ports on the turning balance valve group 106, the blade tip clamping balance valve group 107, and the blade root clamping balance valve group 108 to the same position through the working oil ports A1, A2, A3, B1, B2, and B3, and the interface structures are consistent to facilitate unified docking by users.

[0034] Specifically, the first sub-valve group includes a fourth one-way valve 144, a third solenoid reversing valve 261, a first hydraulically controlled one-way valve 271 and a first one-way throttle valve 281. The oil from the eighth oil pipe 008 enters the first hydraulically controlled one-way valve 271 and the first one-way throttle valve 281 in sequence through the third solenoid reversing valve 261. The hydraulic oil passing through the third solenoid reversing valve 261 can also be redirected to flow through the fourth one-way valve 144. The second sub-valve group includes a fifth one-way valve 145, a first pressure reducing valve 291, a fourth solenoid reversing valve 262, a second hydraulically controlled one-way valve 272 and a second one-way throttle valve 282. The oil from the eighth oil pipe 008 enters the first hydraulically controlled one-way valve 271 and the first one-way throttle valve 281 in sequence. The hydraulic oil passing through the third solenoid reversing valve 261 can also be redirected to flow through the fourth one-way valve 144. The hydraulic oil passes through the first pressure reducing valve 291 and enters the fourth electromagnetic reversing valve 262, the second hydraulically controlled one-way valve 272, and the second one-way throttle valve 282 in sequence. The hydraulic oil passing through the fourth electromagnetic reversing valve 262 can also be redirected to flow through the fifth one-way valve 145. The third sub-valve group includes the sixth one-way valve 146, the fifth electromagnetic reversing valve 263, the third hydraulically controlled one-way valve 273, the third one-way throttle valve 283 and the second pressure reducing valve 292. The oil from the eighth oil pipe 008 passes through the second pressure reducing valve 292 and enters the fifth electromagnetic reversing valve 263, the third hydraulically controlled one-way valve 273, the third one-way throttle valve 283 in sequence. The hydraulic oil can also be redirected to flow through the sixth one-way valve 146; wherein, the first sub-valve group, the second sub-valve group, and the third sub-valve group can switch the working oil circuit through the third solenoid reversing valve 261, the fourth solenoid reversing valve 262, and the fifth solenoid reversing valve 263 respectively, and the first sub-valve group, the second sub-valve group, and the third sub-valve group can prevent the pressure oil from flowing back through the fourth one-way valve 144, the fifth one-way valve 145, and the sixth one-way valve 146 respectively, and the first sub-valve group, the second sub-valve group, and the third sub-valve group can respectively through the first hydraulically controlled one-way valve 271, the second hydraulically controlled one-way valve 272, and the third hydraulically controlled one-way valve 273 To achieve locking and long-term internal pressure maintenance, the first sub-valve group, the second sub-valve group, and the third sub-valve group can control the pressure oil entering the reversing valve through the first one-way throttle valve 281, the second one-way throttle valve 282, and the third one-way throttle valve 283 respectively, and the second sub-valve group and the third sub-valve group control the oil pressure entering their respective valve groups through the first pressure reducing valve 291 and the second pressure reducing valve 292 respectively. It should be noted that the oil flowing out of the fourth one-way valve 144, the fifth one-way valve 145, and the sixth one-way valve 146 can enter the blade tip clamping balance valve group 107 or the blade root clamping balance valve group 108 to adjust the corresponding oil pressure.

[0035] Furthermore, the reversing valve group 105 also includes a seventh one-way valve 147 , and the oil from the eighth oil pipe 008 can also directly enter the blade tip clamping balance valve group 107 or the blade root clamping balance valve group 108 through the seventh one-way valve 147 .

[0036] The wiring terminal box group 30 connects the wiring harnesses of all electrical components on the main control valve group 104, the reversing valve group 105, the turning balance valve group 106, the blade tip clamping balance valve group 107, and the blade root clamping balance valve group 108 to the terminals in the terminal box, which serves as the external electrical interface of the hydraulic unit to facilitate unified docking by users. In addition, all the wiring harness shielding layers are connected to the terminal box to achieve grounding of the wiring harnesses of all electrical components.

[0037] Specifically, the hydraulic system also includes a DC motor pump group, the two ends of which are connected to the oil tank assembly 101 and the main control valve group 104 respectively. The DC motor pump group serves as a spare motor pump group to play an emergency role and increase the safety of the system.

[0038] like Figure 6 , Figure 8 As shown, the turning balance valve group 106 includes a third pressure sensor 203, a fourth pressure sensor 204, a first balance valve 311 and a second balance valve 312. The two ends of the first balance valve 311 and the second balance valve 312 are respectively connected to the oil outlets A1 and B1 of the reversing valve group 105 and the oil inlet of the turning cylinder 36. The first balance valve 311 and the second balance valve 312 can accurately adjust the flow of the hydraulic oil of the turning cylinder 36, thereby controlling the movement speed of the turning cylinder 36. The third pressure sensor 203 and the fourth pressure sensor 204 can monitor the pressure in the turning cylinder 36 in real time, greatly increasing the safety of the hydraulic system suitable for single-blade slings. The turning balance valve group 106 is controlled to realize overload protection of the turning cylinder 36 and drive the turning cylinder 36, so that the hydraulic system can provide a stable and safe power source for the turning cylinder 36, so that the turning cylinder 36 can complete related work more accurately, conveniently and stably.

[0039] like Figure 8As shown, the blade tip clamping balance valve group 107 includes a fifth pressure sensor 205, a sixth pressure sensor 206, a third balance valve 313, a fourth balance valve 314, a sixth electromagnetic reversing valve 321, a seventh electromagnetic reversing valve 322 and a fourth accumulator 341. The two ends of the third balance valve 313 and the fourth balance valve 314 are respectively connected to the oil outlets A2 and B2 of the reversing valve group 105 and the oil inlet of the blade tip clamping cylinder 351. The third balance valve 313 and the fourth balance valve 314 can accurately adjust the flow rate of the hydraulic oil, thereby controlling the movement speed of the blade tip clamping cylinder 351. The second accumulator 205 and the sixth pressure sensor 206 monitor the pressure in the blade tip clamping cylinder 351 in real time; when the solenoid valve is powered on, the second accumulator 232 and the third accumulator 233 provide pressure oil to the blade tip clamping cylinder 351 to help the blade tip clamping cylinder 351 to retract quickly and stably; in addition, the fourth accumulator 341 is used to maintain the pressure of the blade tip clamping cylinder 351, and can continue to stably provide power to the blade tip clamping actuator, play a role in maintaining the pressure of the blade tip clamping system, and can absorb the pulsation of the blade tip clamping cylinder 351, greatly increasing the safety of the hydraulic system suitable for single-blade hangers. The overload protection of the blade tip clamping cylinder 351 and the driving of the blade tip clamping cylinder 351 are realized by controlling the blade tip clamping balance valve group 107, so that the hydraulic system can provide a stable and safe power source for the blade tip clamping cylinder 351, so that the blade tip clamping cylinder 351 can complete related work more accurately, conveniently and stably.

[0040] like Figure 7 , Figure 8As shown, the blade root clamping balance valve group 108 includes a seventh pressure sensor 207, an eighth pressure sensor 208, a fifth balance valve 315, a sixth balance valve 316, an eighth electromagnetic reversing valve 323, a ninth electromagnetic reversing valve 324 and a fifth accumulator 342. Both ends of the fifth balance valve 315 and the sixth balance valve 316 are respectively connected to the oil outlets A3 and B3 of the reversing valve group 105 and the oil inlet of the blade root clamping cylinder 352. The fifth balance valve 315 and the sixth balance valve 316 can accurately adjust the flow rate of the hydraulic oil, thereby controlling the movement speed of the blade root clamping cylinder 352. The seventh pressure sensor 207 and the eighth pressure sensor 208 are connected to the oil outlets A3 and B3 of the reversing valve group 105 and the oil inlet of the blade root clamping cylinder 352. The force sensor 208 monitors the pressure in the blade root clamping cylinder 352 in real time. The actuator here is the blade root clamping cylinder 352. When the solenoid valve is powered on, the second accumulator 232 and the third accumulator 233 provide pressure oil to the blade root clamping cylinder 352 to help the blade root clamping cylinder 352 to retract quickly and stably. The fifth accumulator 342 is used to maintain the pressure of the blade root clamping cylinder 352, and can continue to stably provide power to the blade root clamping actuator, play a role in maintaining pressure on the blade root clamping system, and can absorb the pulsation of the blade root clamping cylinder 352, greatly increasing the safety of the hydraulic system suitable for single-blade hangers. The overload protection of the blade root clamping system and the driving of the blade root clamping cylinder 352 are realized by controlling the blade root clamping balance valve group 108, so that the hydraulic system can provide a stable and safe power source for the blade root clamping cylinder 352, so that the blade root clamping cylinder 352 can complete related work more accurately, conveniently and stably.

[0041] The pressure sensor and the pressure gauge in the present invention are both connected to the working oil circuit, and the pressure gauge is used to display the pressure locally, so that the staff can control it according to the pressure situation to ensure the safety and stability of the hydraulic system. In addition, the pressure detected by the pressure sensor can realize the full and remote monitoring of the pressure of the hydraulic system.

[0042] like Figure 3 , Figure 8As shown, the accumulator installation valve group 109 includes a first accumulator safety valve assembly 221, a second accumulator safety valve assembly 222, a second accumulator 232 and a third accumulator 233. The first accumulator safety valve assembly 221 and the second accumulator 232 are connected in series to form a first accumulator group, the second accumulator safety valve assembly 222 and the third accumulator 233 are connected in series to form a second accumulator group, and the first accumulator group and the second accumulator group are connected in parallel and are both connected to the blade tip clamping balance valve group 107 and the blade root clamping balance valve group through the fourth oil pipe 004. 108, the emergency oil source of the hydraulic unit can be provided by the second accumulator 232 and the third accumulator 233, and the second accumulator 232 and the third accumulator 233 can provide pressure oil for the retraction of the blade tip clamping and blade root clamping actuators, which plays a role of rapid and stable retraction. The oil inlet and oil discharge of the second accumulator 232 and the third accumulator 233 can be controlled by the first accumulator safety valve assembly 221 and the second accumulator safety valve assembly 222, and the accumulator installation valve group 109 is controlled by the oil circuit composed of the above various components. The accumulator in the present invention ensures the stability and safety of the hydraulic system suitable for single-blade spreaders. At the same time, it can work for a long time in harsh environments and has high reliability.

[0043] In the present invention, the switching opening and closing of the working oil circuit and the return oil circuit is realized by the reversing valve group 105, which is easy to operate and maintain. The action speed of the return oil circuit can be controlled by the turning balance valve group 106, the blade tip clamping balance valve group 107, and the blade root clamping balance valve group 108 to ensure the stability of the load; at the same time, the maximum safety pressure can be controlled by the main control valve group 104 to ensure the stability and safety of the system. In addition, the first accumulator 231 in the system can provide pressure oil for the turning cylinder 36, the blade tip clamping cylinder 351, and the blade root clamping cylinder 352 when the oil supply motor pump is powered off; the fourth accumulator 341 and the fifth accumulator 342 maintain the pressure of the blade tip clamping cylinder 351 and the blade root clamping cylinder 352, and absorb pulsation at the same time, and can work for a long time in harsh environments; the second accumulator 232 and the third accumulator 233 can provide pressure oil for the rapid retraction of the blade tip clamping cylinder 351 and the blade root clamping cylinder 352, with high reliability, ensuring the stability and safety of the system. The hydraulic system suitable for single-blade slings in the present invention can enable the turning actuator, the blade tip clamping actuator, and the blade root clamping actuator to complete related work more accurately, conveniently, and stably.

[0044] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A hydraulic system suitable for a single blade spreader, characterized in that: It comprises an oil tank assembly (101), an oil supply motor pump assembly (102), an emergency oil supply motor pump assembly (103), a main control valve assembly (104), a reversing valve assembly (105), a turning balance valve assembly (106), a blade tip clamping balance valve assembly (107), a blade root clamping balance valve assembly (108), an accumulator installation valve assembly (109), a terminal box assembly (30), and a cover (110); The cover (110) has an accommodation space inside, and the oil tank assembly (101), the oil supply motor pump assembly (102), the emergency oil supply motor pump assembly (103), the main control valve assembly (104), the reversing valve assembly (105), the turning balance valve assembly (106), the blade tip clamping balance valve assembly (107), the blade root clamping balance valve assembly (108), the accumulator installation valve assembly (109), and the terminal box assembly (30) are all arranged in the accommodation space; The blade tip clamping balance valve assembly (107) comprises a fifth pressure sensor (205), a sixth pressure sensor (206), a third balance valve (313), a fourth balance valve (314), a sixth electromagnetic reversing valve (321), a seventh electromagnetic reversing valve (322), and a fourth accumulator (341); The two ends of the third balancing valve (313) and the fourth balancing valve (314) are respectively connected to the oil outlets A2 and B2 of the reversing valve group (105) and the oil inlet of the blade tip clamping cylinder (351); the sixth electromagnetic reversing valve (321), the fifth pressure sensor (205) and the fourth accumulator (341) are all arranged at the outlet of the third balancing valve (313); and the seventh electromagnetic reversing valve (322) and the sixth pressure sensor (206) are all arranged at the outlet of the fourth balancing valve (314); Connecting the accumulator mounting valve group (109) via the sixth electromagnetic reversing valve (321); The blade root clamping balance valve assembly (108) comprises a seventh pressure sensor (207), an eighth pressure sensor (208), a fifth balance valve (315), a sixth balance valve (316), an eighth electromagnetic reversing valve (323), a ninth electromagnetic reversing valve (324), and a fifth accumulator (342); The two ends of the fifth balancing valve (315) and the sixth balancing valve (316) are respectively connected to the oil outlets A3 and B3 of the reversing valve group (105) and the oil inlet of the blade root clamping cylinder (352); the eighth electromagnetic reversing valve (323), the seventh pressure sensor (207) and the fifth accumulator (342) are all arranged at the outlet of the fifth balancing valve (315); and the ninth electromagnetic reversing valve (324) and the eighth pressure sensor (208) are all arranged at the outlet of the sixth balancing valve (316); The accumulator installation valve group (109) is connected via the eighth electromagnetic reversing valve (323).

2. The hydraulic system for a single blade spreader according to claim 1, characterized in that: The oil tank assembly (101) comprises an oil tank (1), an air filter (3), an air cooler (9), a float type liquid level sensor (10) arranged inside the oil tank (1), a temperature sensor (11), and a liquid level meter (2) and a heater (12) arranged on the side wall of the oil tank (1); The air filter (3) is arranged on the top of the oil tank (1), and the air cooler (9) is arranged above the oil tank (1). The air cooler (9) is used to cool the hydraulic oil returning to the oil tank (1).

3. The hydraulic system for a single blade spreader according to claim 1, characterized in that: The oil supply motor pump assembly (102) comprises a first motor (5), a first gear pump (6) and a first coupling assembly (37); the first motor (5) is drivingly connected to the first gear pump (6) via the first coupling assembly (37); the inlet of the first gear pump (6) is connected to the oil tank assembly (101); and the outlet of the first gear pump (6) is connected to the main control valve assembly (104) via a first oil pipe (001); The emergency oil supply motor pump assembly (103) comprises a second motor (25), a second gear pump (38) and a second coupling assembly (39); the second motor (25) is drivingly connected to the second gear pump (38) via the second coupling assembly (39); the inlet of the second gear pump (38) is connected to the oil tank assembly (101); and the outlet of the second gear pump (38) is connected to the main control valve assembly (104) via a third oil pipe (003).

4. The hydraulic system for a single blade spreader according to claim 1, characterized in that: The main control valve group (104) comprises a first pressure sensor (201), a first pressure gauge (211), a second pressure sensor (202), a second pressure gauge (212), a first filter (15), a second filter (40), a first filter assembly (41), a second filter assembly (42), a third filter assembly (43), a first check valve (141), a second check valve (142), a third check valve (143), a first reversing valve (16), a second reversing valve (18), a first stop valve (19), a first relief valve (171), a second relief valve (172), a third relief valve (173), a high-pressure ball valve (24), and a first accumulator (231); The first filter (15) is arranged on the first oil pipe (001), the inlet of the first filter is connected to the first one-way valve (141), the outlet of the first filter is connected to the second one-way valve (142), and the first filter assembly (41), the second filter assembly (42), and the third filter assembly (43) are arranged in parallel; The front ends of the first filter assembly (41), the second filter assembly (42) and the third filter assembly (43) are connected to the oil supply motor pump assembly (102) via the first oil pipe (001), connected to the emergency oil supply motor pump assembly (103) via the second oil pipe (002), and the rear ends are connected to the seventh oil pipe (007). The seventh oil pipe (007) is provided with a third one-way valve (143). The end of the seventh oil pipe (007) is connected to the high-pressure ball valve (24) and the first accumulator (231) in sequence. The first accumulator (231) is located at the outlet of the second one-way valve (142); The second oil pipe (002) is an oil return pipe. The second oil pipe (002) is connected to the inlet of the first filter (15) through a first overflow valve (171), and is connected to the outlet of the first filter (15) through a first reversing valve (16). The third oil pipe (003) is connected to the second oil pipe (002) through a sixth oil pipe (006). The sixth oil pipe (006) is provided with a second reversing valve (18) and a third overflow valve (173) arranged in parallel. Two ends of the second filter (40) are respectively connected to an air cooler (9) and an oil tank assembly (101). The air cooler (9) is arranged on the second oil pipe (002).

5. The hydraulic system for a single blade spreader according to claim 1, characterized in that: The main control valve group (104) is connected to the reversing valve group (105) via an eighth oil pipe (008); the reversing valve group (105) comprises a first sub-valve group, a second sub-valve group and a third sub-valve group; the first sub-valve group, the second sub-valve group and the third sub-valve group are arranged in parallel and their oil inlets are all connected to the eighth oil pipe (008); the oil outlet of the first sub-valve group is connected to the turning balance valve group (106) via oil outlets A1 and B1; the oil outlet of the second sub-valve group is connected to the blade tip clamping balance valve group (107) via oil outlets A2 and B2; the oil outlet of the third sub-valve group is connected to the blade root clamping balance valve group (108) via oil outlets A3 and B3; the first sub-valve group, the second sub-valve group and the third sub-valve group are all connected to the second oil pipe (002) via the fifth oil pipe (005); The working oil ports A1, A2, A3, B1, B2, and B3 concentrate all the oil ports on the turning balance valve group (106), the blade tip clamping balance valve group (107), and the blade root clamping balance valve group (108) at the same location and have the same interface structure.

6. The hydraulic system for a single blade spreader according to claim 5, characterized in that: The first sub-valve group comprises a fourth one-way valve (144), a third electromagnetic reversing valve (261), a first hydraulically controlled one-way valve (271) and a first one-way throttle valve (281); oil from the eighth oil pipe (008) enters the first hydraulically controlled one-way valve (271) and the first one-way throttle valve (281) in sequence through the third electromagnetic reversing valve (261); and hydraulic oil passing through the third electromagnetic reversing valve (261) can also be redirected to flow away through the fourth one-way valve (144); The second sub-valve group comprises a fifth one-way valve (145), a first pressure reducing valve (291), a fourth solenoid reversing valve (262), a second hydraulically controlled one-way valve (272) and a second one-way throttle valve (282); oil from the eighth oil pipe (008) enters the fourth solenoid reversing valve (262), the second hydraulically controlled one-way valve (272) and the second one-way throttle valve (282) in sequence through the first pressure reducing valve (291); and hydraulic oil passing through the fourth solenoid reversing valve (262) can also be redirected to flow away through the fifth one-way valve (145); The third sub-valve group comprises a sixth one-way valve (146), a fifth solenoid reversing valve (263), a third hydraulically controlled one-way valve (273), a third one-way throttle valve (283) and a second pressure reducing valve (292); the oil from the eighth oil pipe (008) enters the fifth solenoid reversing valve (263), the third hydraulically controlled one-way valve (273) and the third one-way throttle valve (283) in sequence through the second pressure reducing valve (292); the hydraulic oil passing through the fifth solenoid reversing valve (263) can also be redirected to flow away through the sixth one-way valve (146); The reversing valve group (105) further comprises a seventh one-way valve (147), and oil from the eighth oil pipe (008) can also directly enter the blade tip clamping balance valve group (107) or the blade root clamping balance valve group (108) through the seventh one-way valve (147).

7. The hydraulic system for a single blade spreader according to claim 1, characterized in that: The wiring terminal box group (30) connects the wiring harnesses of all electrical components on the main control valve group (104), the reversing valve group (105), the turning balance valve group (106), the blade tip clamping balance valve group (107), and the blade root clamping balance valve group (108) to the terminals in the terminal box, serving as the external electrical interface of the hydraulic system, and all the wiring harness shielding layers are connected to the terminal box; It also includes a DC motor pump group as a spare motor pump group, and two ends of the DC motor pump group are respectively connected to the oil tank assembly (101) and the main control valve group (104).

8. The hydraulic system for a single blade spreader according to claim 1, characterized in that: The turning gear balancing valve assembly (106) comprises a third pressure sensor (203), a fourth pressure sensor (204), a first balancing valve (311) and a second balancing valve (312); The two ends of the first balancing valve (311) and the second balancing valve (312) are respectively connected to the oil outlets A1 and B1 of the reversing valve group (105) and the oil inlet of the turning cylinder (36); the third pressure sensor (203) and the fourth pressure sensor (204) are respectively arranged on the outlets of the first balancing valve (311) and the second balancing valve (312).

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