Rotational energy recovery system of operating machinery and operating machinery

Abstract

The present invention relates to the technical field of operating machinery, and provides a rotary energy recovery system for an operating machinery and an operating machinery. The rotary energy recovery system for the operating machinery includes: a rotary motor for connecting to a reducer; an electromagnetic clutch, one end of which is connected to the rotary motor; a flywheel, which is connected to the other end of the electromagnetic clutch; a clutch control device for controlling the electromagnetic clutch to cut off power or transmit power; a first reversing valve and a second reversing valve; the first reversing valve is used to switch the rotary motor between forward and reverse rotation; the second reversing valve is connected to the clutch control device, and the second reversing valve is used to control the clutch control device; a controller is used to control the conduction and cutoff of the first pilot oil circuit and the second pilot oil circuit; and the controller controls the direction of current in the electromagnetic clutch. The present invention adopts electronic control and hydraulic pressure to precisely control energy storage and energy release, which can improve energy utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of operating machinery, and in particular to a rotary energy recovery system of an operating machinery and the operating machinery. Background Art

[0002] With the development of diversified applications for work machinery, their structures are becoming more refined, user-friendly, and easier to operate and maintain. Some work machinery frequently requires periodic reciprocating rotational motions. For example, excavators, when in operation for extended periods, must perform thousands of rotations daily. The hydraulic system provides energy for acceleration and dissipates it during deceleration and stopping. This process repeats itself, and when the reduction gear stops, the consumed energy is converted into heat, resulting in significant energy waste.

[0003] Numerous existing devices for recovering and utilizing rotational energy typically utilize accumulators. However, because accumulators compress gas or springs during operation, the stored energy is often variable, making it difficult to tailor energy consumption to actual needs and resulting in low energy utilization. Summary of the Invention

[0004] The present invention provides a rotary energy recovery system for an operating machine and an operating machine, so as to solve the defect in the prior art that energy demand cannot be matched according to actual demand, and realize accurate control of stored energy.

[0005] The present invention provides a rotary energy recovery system for an operating machine, comprising:

[0006] Rotary motor;

[0007] an electromagnetic clutch, one end of which is connected to the rotary motor;

[0008] a flywheel connected to the other end of the electromagnetic clutch;

[0009] A clutch control device for controlling the electromagnetic clutch to cut off power or transmit power;

[0010] The first reversing valve has a first pilot oil port a1 and a second pilot oil port b1, and the second reversing valve has a third pilot oil port a2 and a fourth pilot oil port b2; the first pilot oil port a1 and the third pilot oil port a2 are both connected to the first pilot oil circuit; the second pilot oil port b1 and the fourth pilot oil port b2 are both connected to the second pilot oil circuit;

[0011] The first reversing valve is used to switch the rotary motor between forward and reverse rotation; the second reversing valve is connected to the clutch control device, and the second reversing valve is used to control the clutch control device;

[0012] A controller is used to control the conduction and cutoff of the first pilot oil circuit and the second pilot oil circuit; and the controller controls the direction of the current in the electromagnetic clutch.

[0013] According to the present invention, a rotary energy recovery system for an operating machine also includes a first delay device and a second delay device. The first delay device is arranged on the first pilot oil circuit and is close to the third pilot oil port a2; the second delay device is arranged on the second pilot oil circuit and is close to the fourth pilot oil port b2.

[0014] According to the present invention, a rotary energy recovery system for an operating machine also includes a first one-way valve and a second one-way valve. The first one-way valve is arranged on the first pilot oil circuit, and the first one-way valve is connected in parallel with the first delay device; the second one-way valve is arranged on the second pilot oil circuit, and the second one-way valve is connected in parallel with the second delay device.

[0015] According to the present invention, a rotary energy recovery system for an operating machine also includes a first reverse pilot oil circuit and a second reverse pilot oil circuit, and one end of the first reverse pilot oil circuit is connected to the first one-way valve, and the other end is connected to the second pilot oil circuit; one end of the second reverse pilot oil circuit is connected to the second one-way valve, and the other end is connected to the first pilot oil circuit; the controller is provided with a reverse signal being superior to a delayed signal.

[0016] According to a rotary energy recovery system for a working machine provided by the present invention, the electromagnetic clutch comprises:

[0017] a first bevel gear having a first electromagnetic coil disposed therein;

[0018] a second bevel gear meshing with the first bevel gear;

[0019] a third bevel gear, which is disposed on both sides of the second bevel gear and the first bevel gear, and is meshed with the second bevel gear; a second electromagnetic coil is disposed inside the third bevel gear;

[0020] a permanent magnet connected to the rotary motor, and the permanent magnet is connected to the clutch control device;

[0021] The electromagnetic switch assembly is arranged on the loop of the first electromagnetic coil and the second electromagnetic coil. The electromagnetic switch assembly is used to realize the conduction, cutoff and current direction switching of the first electromagnetic coil loop and the second electromagnetic coil; the electromagnetic switch assembly is connected to the controller.

[0022] According to a rotary energy recovery system for a working machine provided by the present invention, the electromagnetic switch assembly includes:

[0023] A first electromagnetic switch and a first semiconductor are provided on the first branch;

[0024] A second electromagnetic switch and a second semiconductor are provided on a second branch, and the second branch is provided in parallel with the first branch on the loop of the first electromagnetic coil, and either the first branch or the second branch is selectively turned on or both are turned off;

[0025] A third electromagnetic switch and a third semiconductor are provided on the third branch;

[0026] The fourth electromagnetic switch and the fourth semiconductor are arranged on the fourth branch, and the fourth branch is arranged in parallel with the third branch on the loop of the second electromagnetic coil, and the third branch and the fourth branch are selectively turned on or both are turned off.

[0027] According to a rotary energy recovery system for a working machine provided by the present invention, the clutch control device includes:

[0028] a first regulating oil cylinder, connected to the first working oil port of the second reversing valve; the first regulating oil cylinder is used to move the permanent magnet upward to the induction area of ​​the first electromagnetic coil;

[0029] The second regulating oil cylinder is connected to the second working oil port of the second reversing valve; the second regulating oil cylinder is used to move the permanent magnet downward into the induction area of ​​the second electromagnetic coil.

[0030] According to the present invention, a rotary energy recovery system for an operating machine further includes a shuttle valve, wherein the first oil inlet and the second oil inlet of the shuttle valve are respectively connected to the first working oil port A and the second working oil port B of the first reversing valve; the oil outlet of the shuttle valve is connected to the oil inlet of the second reversing valve.

[0031] According to the present invention, a rotary energy recovery system for an operating machine also includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged on the first pilot oil circuit, and the second pressure sensor is arranged on the second pilot oil circuit, and the first pressure sensor and the second pressure sensor are both electrically connected to the controller.

[0032] The present invention also provides a working machine, comprising:

[0033] Hydraulic system;

[0034] The swing energy recovery system as described above, and the swing energy recovery system of the working machine is connected to the hydraulic system.

[0035] The present invention provides a rotary energy recovery system for an operating machine. When the rotary motor brakes, the controller controls the clutch control device, which controls the electromagnetic clutch to transmit power through the clutch control device, and the rotary motor transmits power to the flywheel, causing the flywheel to accelerate. Conversely, when the rotary motor accelerates, the flywheel transmits torque to the rotary motor, causing the rotary motor to accelerate. The controller controls the first reversing valve to switch the rotary motor between forward and reverse rotation. When the rotary motor rotates forward, the first pilot oil circuit is connected, and when the rotary motor reverses, the second pilot oil circuit is connected. The controller controls the up and down movement of the clutch control device by controlling the second reversing valve, thereby realizing the electromagnetic clutch to cut off or transmit power. At the same time, the controller can also control the direction of current in the electromagnetic clutch, thereby realizing torque transmission. The electro-hydraulic combined precise control scheme is adopted to improve energy utilization and reduce unnecessary energy loss.

[0036] The present invention also provides a working machine, which includes the above-mentioned rotary energy recovery system for the working machine and thus has the above-mentioned various advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is a schematic diagram of the working principle of the rotary energy recovery system provided by the present invention;

[0039] Figure 2 This is a schematic diagram of the working principle of the electromagnetic clutch provided by the present invention;

[0040] Figure 3 This is a schematic diagram of the torque regulation principle of the energy storage device provided by the present invention;

[0041] Figure 4 This is a schematic diagram of the working principle of the forward acceleration process of the rotary motor provided by the present invention;

[0042] Figure 5 This is a schematic diagram of the working principle of the forward rotation deceleration process of the rotary motor provided by the present invention;

[0043] Figure 6 This is a schematic diagram of the working principle of the rotary motor provided by the present invention at a constant speed;

[0044] Reference numerals:

[0045] 1. Flywheel; 2. First bevel gear; 3. First electromagnetic coil; 4. Second bevel gear; 5. Second electromagnetic coil; 6. Third bevel gear; 7. Permanent magnet; 8. Output mechanism; 9. Reducer; 10. First relief valve; 11. Coupling; 12. Rotary motor; 13. Shuttle valve; 14. First pressure sensor; 15. Second relief valve; 16. First reversing valve; 171. First delay device; 172. Second delay device; 181. First check valve; 182. Second check valve; 19. Second pressure sensor; 20. Fuel tank; 21. Second reversing valve; 22. First regulating cylinder; 23. Second regulating cylinder; 24. Third semiconductor; 25. Fourth semiconductor; 26. Fourth electromagnetic switch; 27. Third electromagnetic switch; 28. Second semiconductor; 29. ​​Second electromagnetic switch; 30. First electromagnetic switch; 31. First semiconductor; 32. Controller

[0046] a1, first pilot oil port; b1, second pilot oil port; a2, third pilot oil port; b2, fourth pilot oil port. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0049] The following combination Figures 1 to 6 Describe a rotary energy recovery system of the present invention, such as Figure 1 As shown, area A is the rotary reducer body, and area B is the energy storage device, which can be connected to the rotary motor 12 through the coupling 11 for energy transfer. The reducer 9 is connected to the flywheel 1 through the coupling 11 and the electromagnetic clutch.

[0050] The output end of the rotary motor 12 is connected to the reducer 9; one end of the electromagnetic clutch is connected to the rotary motor 12, and the other end of the electromagnetic clutch is connected to the flywheel 1. The flywheel 1 can be understood as a wheel-shaped energy accumulator with a large moment of inertia mounted on the machine's rotating shaft. When the machine speed increases, the kinetic energy of the flywheel 1 increases, storing the energy; when the machine speed decreases, the kinetic energy of the flywheel 1 decreases, releasing the energy. The clutch control device is used to control the electromagnetic clutch to cut off or transmit power.

[0051] The electromagnetic clutch includes: a first bevel gear 2, a first electromagnetic coil 3, a second bevel gear 4, a third bevel gear 6 and a second electromagnetic coil 5. The first electromagnetic coil 3 is arranged inside the first bevel gear 2; the second bevel gear 4 is meshed with the first bevel gear 2; the third bevel gear 6 and the first bevel gear 2 are respectively arranged on both sides of the second bevel gear 4, and the third bevel gear 6 is meshed with the second bevel gear 4; the second electromagnetic coil 5 is arranged on the inner periphery of the third bevel gear 6; the permanent magnet 7 is connected to the rotary motor 12, and the permanent magnet 7 is connected to the clutch control device, which can control the permanent magnet 7 to move upward or downward so as to drive the permanent magnet 7 to move between the induction areas of the first electromagnetic coil 3 and the second electromagnetic coil 5; the electromagnetic switch assembly is arranged on the circuit of the first electromagnetic coil 3 and the circuit of the second electromagnetic coil 5, and the electromagnetic switch assembly is used to realize the conduction, cutoff and current direction switching of the circuit of the first electromagnetic coil 3 and the second electromagnetic coil 5; the electromagnetic switch assembly is connected to the controller 32, and the opening and closing of the electromagnetic switch assembly are controlled by the controller 32.

[0052] The first reversing valve 16 has a first pilot oil port a1 and a second pilot oil port b1, and the second reversing valve 21 has a third pilot oil port a2 and a fourth pilot oil port b2; the first pilot oil port a1 and the third pilot oil port a2 are both connected to the first pilot oil circuit; the second pilot oil port b1 and the fourth pilot oil port b2 are both connected to the second pilot oil circuit; and the first reversing valve 16 is used to realize the switching of the rotary motor 12 between forward and reverse rotation; the second reversing valve 21 is connected to the clutch control device, and the second reversing valve 21 is used to control the clutch control device; the clutch control device controls the movement direction through the second reversing valve 21, and the controller 32 is used to control the conduction and cutoff of the first pilot oil circuit and the second pilot oil circuit; and the controller is used to control the current direction in the electromagnetic clutch.

[0053] The first pilot oil circuit is the pilot oil circuit of the hydraulic system of the operating machine when the rotary motor rotates forward; the second pilot oil circuit is the pilot oil circuit of the hydraulic system of the operating machine when the rotary motor rotates reverse.

[0054] The rotary energy recovery system provided by the present invention has the following features: when the rotary motor 12 brakes, the controller 32 controls the clutch control device, and controls the electromagnetic clutch to transmit power through the clutch control device, so that the rotary motor 12 transmits power to the flywheel 1, causing the flywheel 1 to accelerate; conversely, when the rotary motor 12 accelerates, the flywheel 1 transmits torque to the rotary motor 12, causing the rotary motor 12 to accelerate; the controller 32 switches the rotary motor 12 between forward and reverse rotation by controlling the first reversing valve 16; when the rotary motor 12 rotates forward, the first pilot oil circuit is connected, and the rotary motor 12 rotates forward. When the motor 12 reverses, the second pilot oil circuit is connected; the controller 32 controls the up and down movement of the clutch control device by controlling the second reversing valve 21, thereby realizing the electromagnetic clutch to cut off or transmit power. At the same time, the controller 32 can also control the direction of the current in the electromagnetic clutch to realize torque transmission; the first reversing valve 16 is used to realize the switching of the rotary motor 12 between forward and reverse rotation; the second reversing valve 21 is used to control the clutch control device; the electronic control and hydraulic combined precise control scheme is adopted to improve energy utilization and reduce unnecessary energy loss.

[0055] In one embodiment of the present invention, a first delay device 171 and a second delay device 172 are further included. The first delay device 171 is located on the first pilot oil circuit near the third pilot oil port a2; the second delay device 172 is located on the second pilot oil circuit near the fourth pilot oil port b2. Both the first delay device 171 and the second delay device 172 can be throttle valves. The first delay device 171 delays the start of the first pilot oil circuit after oil flow is stopped; the second delay device delays the start of the second pilot oil circuit after oil flow is stopped.

[0056] In one embodiment of the present invention, it also includes a first one-way valve 181 and a second one-way valve 182. The first one-way valve 181 is arranged on the first pilot oil circuit, and the first one-way valve 181 is connected in parallel with the first delay device 171; the second one-way valve 182 is arranged on the second pilot oil circuit, and the second one-way valve 182 is connected in parallel with the second delay device 172.

[0057] The provision of the first check valve 181 not only ensures that the third pilot oil port a2 can only return oil through the throttle valve when returning oil, but also ensures that pressurized oil can enter the third pilot oil port a2 of the second reversing valve 21 when the first pilot oil circuit has oil pressure. Similarly, the provision of the second check valve 182 not only ensures that the fourth pilot oil port b2 can only return oil through the throttle valve when returning oil, but also ensures that pressurized oil can enter the fourth pilot oil port b2 of the second reversing valve 21 when the second pilot oil circuit has oil pressure.

[0058] In one embodiment of the present invention, the electromagnetic switch assembly includes: a first electromagnetic switch 30, a first semiconductor 31, a second electromagnetic switch 29, a second semiconductor 28, a third electromagnetic switch 27, a third semiconductor 24, a fourth electromagnetic switch 26, and a fourth semiconductor 25. The first electromagnetic switch 30 and the first semiconductor 31 are arranged on the first branch; the second electromagnetic switch 29 and the second semiconductor 28 are arranged on the second branch, and the second branch is arranged in parallel with the first branch on the circuit of the first electromagnetic coil 3, and the first branch and the second branch are selectively turned on or both are turned off; the third electromagnetic switch 27 and the third semiconductor 24 are arranged on the third branch; the fourth electromagnetic switch 26 and the fourth semiconductor 25 are arranged on the fourth branch, and the fourth branch is arranged in parallel with the third branch on the circuit of the second electromagnetic coil 5, and the third branch and the fourth branch are selectively turned on or both are turned off.

[0059] like Figure 1 As shown, in order to prevent the speed of the flywheel 1 from being lower than that of the rotary motor 12 when the rotary motor 12 is in the starting state, or to prevent the speed of the flywheel 1 from being higher than that of the rotary motor 12 when the rotary motor 12 is in the braking state, resulting in the system storing or releasing torque contrary to the expected effect, it is mainly achieved through the unidirectional conduction ability of the first semiconductor 31, the second semiconductor 28, the third semiconductor 24 and the fourth semiconductor 25. Secondly, when the rotary motor 12 is not working or rotating at a constant speed, the permanent magnet 7 is not within the induction range of the first electromagnetic coil 3 and the second electromagnetic coil 5, preventing it from affecting the operation of the system.

[0060] like Figure 2 As shown, when the swing motor 12 brakes, with the first electromagnetic switch 30 closed and the permanent magnet 7 entering the induction area of ​​the first electromagnetic coil 3, the swing motor 12 brakes in area A, transmitting torque to the permanent magnet 7, driving the permanent magnet 7 to rotate and generating an induced current in the first electromagnetic coil 3. Under the action of the electromagnetic force, the torque is transmitted to the flywheel 1, causing the flywheel 1 to accelerate. Conversely, when the swing motor 12 accelerates, the flywheel 1 transmits torque to the swing motor 12, causing the swing motor 12 to accelerate.

[0061] like Figure 3 As shown, the greater the upward or downward movement distance L of the permanent magnet 7 is, the greater the magnetic flux Φ of the first electromagnetic coil 3 or the second electromagnetic coil 5 is, and the greater the induced torque T1, T2 generated by the first bevel gear 2 or the third bevel gear 6 is.

[0062] In one embodiment of the present invention, the clutch control device includes a first regulating cylinder 22 and a second regulating cylinder 23. The first regulating cylinder 22 is connected to the first working oil port of the second reversing valve 21; the first regulating cylinder 22 is used to drive the permanent magnet 7 upward to the sensing area of ​​the first electromagnetic coil 3; the second regulating cylinder 23 is connected to the second working oil port of the second reversing valve 21; the second regulating cylinder 23 is used to drive the permanent magnet 7 downward to the sensing area of ​​the second electromagnetic coil 5. The first and second regulating cylinders 22 and 23 are returned to their original positions by springs. The greater the pressure passing through the first and second regulating cylinders 22 and 23, the greater the distance they move.

[0063] In one embodiment of the present invention, a shuttle valve 13 is further included, wherein the first oil inlet and the second oil inlet of the shuttle valve 13 are respectively connected to the first working oil port A and the second working oil port B of the first reversing valve 16; the oil outlet of the shuttle valve 13 is connected to the oil inlet of the second reversing valve 21.

[0064] In one embodiment of the present invention, a first pressure sensor 14 and a second pressure sensor 19 are further included. The first pressure sensor 14 is arranged on the first pilot oil circuit, and the second pressure sensor 19 is arranged on the second pilot oil circuit. Both the first pressure sensor 14 and the second pressure sensor 19 are electrically connected to the controller 32.

[0065] like Figure 1 As shown, the working principle of the rotational energy recovery system is that the controller 32 detects whether the pilot pressure of the first pilot oil port a1 of the first reversing valve 16 and the second pilot oil port b1 of the first reversing valve are rising or falling through the first pressure sensor 14 and the second pressure sensor 19, and the controller 32 determines whether the first electromagnetic switch 30, the second electromagnetic switch 29, the third electromagnetic switch 27 and the fourth electromagnetic switch 26 are in the open state or the closed state.

[0066] When the first pressure sensor 14 detects a rise in pressure at the first pilot oil port a1 of the first reversing valve 16, the swing motor 12 begins to accelerate. The controller 32 controls the first electromagnetic switch 30 to close and begins a time delay. Current flows in the first electromagnetic coil 3 in the forward direction, and the current in the first electromagnetic coil 3 is conducted through the first semiconductor 31, causing the flywheel 1 to accelerate the swing motor 12. After the swing motor 12 has completed acceleration, the controller 32 ends the time delay and controls the first electromagnetic switch 30 to open. During the acceleration process of the swing motor 12, if the speed of the flywheel 1 is lower than that of the swing motor 12, the current in the first electromagnetic coil 3 flows in the reverse direction, and the current in the first electromagnetic coil 3 is not conducted through the first semiconductor 31. The flywheel 1 does not interact with the swing motor 12, thus preventing the flywheel 1 from inhibiting the acceleration process of the swing motor 12.

[0067] When the first pressure sensor 14 detects a drop in pressure at the first pilot oil port a1 of the first reversing valve 16, the swing motor 12 begins to decelerate. The controller 32 controls the second electromagnetic switch 29 to close, and the controller 32 begins a time delay. The current in the first electromagnetic coil 3 flows in the reverse direction, and the current in the first electromagnetic coil 3 is turned on through the second semiconductor 28. The swing motor 12 accelerates the flywheel 1 and begins to decelerate. After the swing motor 12 completes deceleration, the controller 32 ends the time delay and controls the second electromagnetic switch 29 to open. During the deceleration process of the swing motor 12, if the speed of the swing motor 12 is lower than that of the flywheel 1, the current in the first electromagnetic coil 3 flows in the forward direction, and the current in the first electromagnetic coil 3 is turned off through the second semiconductor 28. The swing motor 12 does not interact with the flywheel 1, thus preventing the flywheel 1 from inhibiting the deceleration process of the swing motor 12.

[0068] like Figure 4 As shown, the torque regulation principle of the energy storage device is as follows: When oil is released from the first pilot oil port a1 of the first reversing valve 16, the valve core of the first reversing valve 16 moves to the right, causing the rotary motor 12 to rotate forward and begin to accelerate. At the same time, the pilot oil a1 passes through the first one-way valve 181 to the third pilot oil port a2 of the second reversing valve, pushing the valve core of the second reversing valve 21 to the right. The pressure at port A in the circuit of the rotary motor 12 passes through the shuttle valve 13 and the second reversing valve 21, acting on the first regulating oil cylinder 22, pushing the permanent magnet 7 upward. The greater the pressure in circuit A, the greater the upward movement distance L of the permanent magnet 7, and the greater the torque transmitted to the motor 12 by the flywheel 1 through the electromagnetic clutch. (ω1<ω2)

[0069] like Figure 5 As shown, the torque regulation principle of the energy storage device is as follows: When the first pilot oil port a1 of the first reversing valve 16 stops flowing, the valve core of the first reversing valve 16 returns to the center position. Under the action of the first delay device 171 and the first check valve 181, the third pilot oil port a2 of the second reversing valve 21 gradually returns oil. The second reversing valve 21 remains open for a period of time. The brake pressure at port B in the circuit of the swing motor 12 passes through the shuttle valve 13. The second reversing valve 21 acts on the first regulating cylinder 22, pushing the permanent magnet 7 upward. The greater the pressure in circuit B, the greater the upward movement distance L of the permanent magnet 7, and the greater the torque transmitted to the flywheel 1 by the swing motor 12 through the electromagnetic clutch (ω1>ω2).

[0070] When the rotary motor 12 reverses, the system ensures that the torque transmitted between the rotary motor 12 and the flywheel 1 remains in forward rotation through the third bevel gear 6 and the second bevel gear 4, thereby reducing the energy loss of the flywheel 1 caused by the forward and reverse switching. When it accelerates or decelerates, the first reversing valve 16 and the second reversing valve 21 are in the opposite direction to the forward rotation of the rotary motor 12, and the permanent magnet 7 enters the induction area of ​​the second electromagnetic coil 5. The acceleration or deceleration process is the same as the above principle.

[0071] In addition, if Figure 6 As shown, when the rotary motor rotates at a constant speed, the system neither needs to store nor release energy, and the energy storage device needs to be deactivated. A certain starting pressure is set for the first regulating cylinder 22 and the second regulating cylinder 23. When the rotary motor 12 rotates at a constant speed, regardless of the state of the valve core of the second reversing valve 21, the pressure in circuits A and B is insufficient to push the first regulating cylinder 22 or the second regulating cylinder (P·S<F), causing the permanent magnet 7 to interact with neither the first electromagnetic coil 3 nor the second electromagnetic coil 5.

[0072] In one embodiment of the present invention, it also includes a first reverse pilot oil circuit YZ and a second reverse pilot oil circuit WX, and one end of the first reverse pilot oil circuit YZ is connected to the first one-way valve 181, and the other end is connected to the second pilot oil circuit; one end of the second reverse pilot oil circuit WX is connected to the second one-way valve 182, and the other end is connected to the first pilot oil circuit; the controller 32 is provided with a reverse signal that is superior to the delay signal.

[0073] In actual operating conditions, the swing motor 12 often reverses direction before completing acceleration or deceleration. The present invention addresses this issue by employing a first reverse pilot oil circuit YZ, a second reverse pilot oil circuit WX, first and second check valves 181, 182, and a reverse signal priority over the delay signal within the controller 32. Specifically, if the swing motor 12 reverses direction before completing acceleration or deceleration, the first and second check valves 181, 182 are opened via the first and second reverse pilot oil circuits YZ, WX, causing the second reversing valve 21 to switch directly. Simultaneously, the controller 32 terminates the delay early, allowing the system to directly enter the next cycle.

[0074] The arrangement of the first relief valve 10 and the second relief valve 15 can prevent excessive pressure, which is the same as the motor in the prior art and will not be described in detail here.

[0075] The working machine provided by the present invention is described below. The working machine described below and the rotary energy recovery system described above can be referred to in correspondence with each other.

[0076] Another aspect of the present invention is to provide a working machine comprising:

[0077] The hydraulic system and the swing energy recovery system of the working machine as described above are connected to the hydraulic system.

[0078] The operating machinery provided by the present invention includes the rotational energy recovery system as described above, and therefore uses a flywheel to directly store mechanical energy during the rotation process, thereby improving energy conversion efficiency; in addition, an electronically controlled hydraulic combined precise control scheme is adopted to improve energy utilization and reduce unnecessary energy loss.

[0079] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or modes and features of different embodiments or modes described in this specification without contradiction.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A rotary energy recovery system for an operating machine, characterized in that: include: Rotary motor; An electromagnetic clutch, one end of which is connected to the rotary motor; the electromagnetic clutch comprises a first electromagnetic coil, a second electromagnetic coil and a permanent magnet; a flywheel connected to the other end of the electromagnetic clutch; A clutch control device for controlling the electromagnetic clutch to cut off power or transmit power; The permanent magnet is connected to the rotary motor, and the permanent magnet is also connected to the clutch control device, and the clutch control device is capable of controlling the permanent magnet to move upward or downward, so as to drive the permanent magnet to move between the induction areas of the first electromagnetic coil and the second electromagnetic coil; A first reversing valve has a first pilot oil port and a second pilot oil port; a second reversing valve having a third pilot oil port and a fourth pilot oil port; The first pilot oil port and the third pilot oil port are both connected to the first pilot oil circuit; the second pilot oil port and the fourth pilot oil port are both connected to the second pilot oil circuit; wherein the first pilot oil circuit is the pilot oil circuit of the hydraulic system of the working machine when the swing motor rotates forward; the second pilot oil circuit is the pilot oil circuit of the hydraulic system of the working machine when the swing motor rotates reversely; The first reversing valve is used to switch the rotary motor between forward and reverse rotation; the second reversing valve is connected to the clutch control device, and the second reversing valve is used to control the clutch control device; The controller is used to control the conduction and cutoff of the first pilot oil circuit and the second pilot oil circuit; and the controller is used to control the direction of the current in the electromagnetic clutch.

2. The rotary energy recovery system for a working machine according to claim 1, characterized in that: It also includes a first delay device and a second delay device. The first delay device is arranged on the first pilot oil circuit and close to the third pilot oil port; the second delay device is arranged on the second pilot oil circuit and close to the fourth pilot oil port.

3. The rotary energy recovery system for a working machine according to claim 2, characterized in that: It also includes a first one-way valve and a second one-way valve. The first one-way valve is arranged on the first pilot oil circuit, and the first one-way valve is connected in parallel with the first delay device; the second one-way valve is arranged on the second pilot oil circuit, and the second one-way valve is connected in parallel with the second delay device.

4. The rotary energy recovery system for a working machine according to claim 3, characterized in that: It also includes a first reverse pilot oil circuit and a second reverse pilot oil circuit, and one end of the first reverse pilot oil circuit is connected to the first one-way valve, and the other end is connected to the second pilot oil circuit; one end of the second reverse pilot oil circuit is connected to the second one-way valve, and the other end is connected to the first pilot oil circuit; the controller is provided with a reverse signal that is superior to the delay signal.

5. The rotary energy recovery system for a working machine according to claim 1, characterized in that: The electromagnetic clutch comprises: a first bevel gear, in which the first electromagnetic coil is disposed; a second bevel gear meshing with the first bevel gear; a third bevel gear, which is disposed on both sides of the second bevel gear and the first bevel gear, and is meshed with the second bevel gear; and the second electromagnetic coil is disposed inside the third bevel gear; The electromagnetic switch assembly is arranged on the loop of the first electromagnetic coil and the second electromagnetic coil. The electromagnetic switch assembly is used to realize the conduction, cutoff and current direction switching of the first electromagnetic coil loop and the second electromagnetic coil; the electromagnetic switch assembly is connected to the controller.

6. The rotary energy recovery system for a working machine according to claim 5, characterized in that: The electromagnetic switch assembly comprises: A first electromagnetic switch and a first semiconductor are provided on the first branch; A second electromagnetic switch and a second semiconductor are provided on a second branch, and the second branch is provided in parallel with the first branch on the loop of the first electromagnetic coil, and either the first branch or the second branch is selectively turned on or both are turned off; A third electromagnetic switch and a third semiconductor are provided on the third branch; The fourth electromagnetic switch and the fourth semiconductor are arranged on the fourth branch, and the fourth branch is arranged in parallel with the third branch on the loop of the second electromagnetic coil, and the third branch and the fourth branch are selectively turned on or both are turned off.

7. The rotary energy recovery system for a working machine according to claim 5, characterized in that: The clutch control device comprises: A first regulating oil cylinder is connected to the first working oil port of the second reversing valve; the first regulating oil cylinder is used to drive the permanent magnet to move upward into the induction area of ​​the first electromagnetic coil; The second regulating oil cylinder is connected to the second working oil port of the second reversing valve; the second regulating oil cylinder is used to drive the permanent magnet to move downward into the induction area of ​​the second electromagnetic coil.

8. The rotary energy recovery system for a working machine according to claim 1, characterized in that: It also includes a shuttle valve, wherein the first oil inlet and the second oil inlet of the shuttle valve are respectively connected to the first working oil port A and the second working oil port B of the first reversing valve; the oil outlet of the shuttle valve is connected to the oil inlet of the second reversing valve.

9. The rotary energy recovery system for a working machine according to claim 1, characterized in that: It also includes a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged on the first pilot oil circuit, the second pressure sensor is arranged on the second pilot oil circuit, and the first pressure sensor and the second pressure sensor are both electrically connected to the controller.

10. A working machine, characterized in that: include: Hydraulic system; A rotary energy recovery system for a working machine according to any one of claims 1 to 9, wherein the rotary energy recovery system is connected to the hydraulic system.

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