Shield tunneling machine cutter head driving hydraulic energy recovery system and shield tunneling machine

Abstract

The invention discloses a shield tunneling machine cutterhead driving hydraulic energy recovery system and a shield tunneling machine. The shield tunneling machine cutterhead driving hydraulic energy recovery system comprises a cutterhead driving system, a detector set, an energy conversion recovery system and a controller. The cutterhead driving system comprises a cutterhead driving motor and an electro-hydraulic directional control valve. The detector set is used for detecting the oil pressure of the high-pressure side of the cutterhead driving motor and the rotating speed of the cutterhead and feeding back the oil pressure and the rotating speed to the controller, and the controller is used for starting the cutterhead driving energy recovery mode when the oil pressure and the rotating speed meet the set required values of the system so that the electro-hydraulic reversing valve can move to the middle position and the energy conversion recovery system can be switched on. The oil inlet end of the energy conversion and recovery system is connected with the high-pressure side of the cutterhead driving motor so that high-pressure oil led out of the high-pressure side of the cutterhead driving motor can be conducted in the cutterhead driving energy recovery mode, and pressure energy of the led-out high-pressure oil can be converted and then recovered. According to the scheme, the kinetic energy of the cutterhead is converted and recycled through the hydraulic energy recycling technology so that the energy utilization efficiency of the shield tunneling machine can be improved, energy recycling is timely, and efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield machine cutter drive hydraulic system, in particular, to a shield machine cutter drive hydraulic energy recovery system. Furthermore, the present application also relates to a shield machine comprising the shield machine cutter drive hydraulic energy recovery system. BACKGROUND

[0002] The cutter is the core component of the shield machine, located at the front end of the shield machine, directly contacting and interacting with the excavation surface, and the cutter of the shield machine is used for excavating rock and soil, generally driven by a hydraulic system. In the prior art, the hydraulic system mainly comprises a hydraulic oil tank, an overflow valve, a variable pump, a motor, a filter, an electro-hydraulic reversing valve, a hydraulic motor and the like.

[0003] In the prior art, the cutter drive deceleration or braking condition is realized by controlling the electro-hydraulic reversing valve to be de-energized in the neutral state. Since the cutter brake is not configured with a running brake, it takes a long time for the cutter to stop completely from triggering the brake due to inertia.

[0004] In the prior art, since the cutter is not configured with a running brake, the cutter brake completely relies on the external load to stop, so when the cutter is in an abnormal condition to the cutter completely stops, a certain braking time is required, therefore the kinetic energy of the rotating cutter cannot be recycled during the cutter stopping process, resulting in energy loss and waste. SUMMARY

[0005] The present application provides a shield machine cutter drive hydraulic energy recovery system and a shield machine to solve the technical problem that the kinetic energy of the rotating cutter cannot be recycled during the cutter stopping process in the prior art, thereby causing energy loss and waste.

[0006] The technical scheme adopted by the present application is as follows: A shield machine cutter drive hydraulic energy recovery system, comprising: a cutter drive system for driving the cutter to rotate in forward and reverse directions, a detector group, an energy conversion and recovery system, and a controller connected to the cutter drive system, the detector group and the energy conversion and recovery system; the cutter drive system comprises a cutter drive motor for driving the cutter to rotate, and an electro-hydraulic reversing valve for changing the oil supply direction to correspondingly control the cutter drive motor to rotate in forward or reverse directions; the detector group is used to detect the oil pressure of the high pressure side of the cutter drive motor and the rotating speed of the cutter respectively and feed back to the controller, and the controller is used to start the cutter drive energy recovery mode when the oil pressure and the rotating speed both meet the system set requirement value, so that the electro-hydraulic reversing valve moves to the neutral position and the energy conversion and recovery system is turned on; the high pressure side of the cutter drive motor is connected to the oil inlet end of the energy conversion and recovery system, so that the high pressure oil of the high pressure side of the cutter drive motor is led out and the pressure energy of the led-out high pressure oil is converted and recovered when the cutter drive energy recovery mode is started.

[0007] Further, the energy conversion recovery system comprises a high-pressure oil leading-out circuit and an energy conversion recovery circuit; an oil inlet end of the high-pressure oil leading-out circuit is connected to a high-pressure side of the cutter driving motor, and an oil outlet end of the high-pressure oil leading-out circuit is connected to an oil inlet end of the energy conversion recovery circuit to be conducted when the cutter driving energy recovery mode is used to lead out high-pressure oil from the high-pressure side of the cutter driving motor; the energy conversion recovery circuit is used to convert pressure energy of the high-pressure oil into electrical energy for storage and to recover low-pressure oil formed after energy conversion, or the energy conversion recovery circuit is used to directly store pressure energy of the high-pressure oil and to recover low-pressure oil formed after energy conversion.

[0008] Further, the high-pressure oil leading-out circuit comprises a first leading-out oil circuit and a second leading-out oil circuit; the first leading-out oil circuit comprises a first leading-out pipe connected to the L oil port of the cutter driving motor and the energy conversion recovery circuit and a first electromagnetic ball valve arranged in the first leading-out pipe; the second leading-out oil circuit comprises a second leading-out pipe connected to the R oil port of the cutter driving motor and the energy conversion recovery circuit and a second electromagnetic ball valve arranged in the second leading-out pipe.

[0009] Further, the detector group comprises a first pressure detector and a second pressure detector for detecting pressures of the L oil port and the R oil port on both sides of the cutter driving motor, respectively, and a speed detector for detecting a rotational speed of the cutter; the first pressure detector, the second pressure detector and the speed detector are connected to the controller, respectively.

[0010] Further, the energy conversion recovery circuit comprises an energy conversion motor for converting pressure energy of the high-pressure oil into mechanical energy, a generator for generating electricity under the driving of the energy conversion motor, and a capacitor for storing electrical energy; an oil inlet side of the energy conversion motor is connected to oil outlet ends of both the first leading-out pipe and the second leading-out pipe through a first oil outlet pipe, and an oil outlet side of the energy conversion motor is communicated with the oil storage tank for low-pressure oil storage; the generator is connected to the energy conversion motor, and the capacitor is connected to the generator.

[0011] Further, the energy conversion recovery circuit comprises an accumulator for storing the high-pressure oil and a first overflow circuit for overflowing excess high-pressure oil; the accumulator is connected to oil outlet ends of both the first leading-out pipe and the second leading-out pipe through a second oil outlet pipe; the first overflow circuit comprises a first overflow pipe, an oil storage tank connected to an oil outlet end of the first overflow pipe, a first overflow valve arranged in the first overflow pipe, and an oil inlet end of the first overflow pipe connected to the second oil outlet pipe.

[0012] Further, the energy conversion recovery circuit further comprises a pressure relief circuit, which comprises a pressure relief pipe, an oil storage tank connected to an oil outlet end of the pressure relief pipe, a pressure gauge and a pressure relief ball valve arranged in the pressure relief pipe in sequence; an oil inlet end of the pressure relief pipe is connected to the second oil outlet pipe.

[0013] Further, the cutter head driving system comprises a hydraulic oil tank for containing hydraulic oil, a variable pump for pumping the hydraulic oil, a driving motor for driving the variable pump to operate, a filter for filtering the pumped hydraulic oil, an electro-hydraulic reversing valve, a balance valve group for preventing the load from causing the cutter head to rotate, and a cutter head driving motor; the hydraulic oil tank, the variable pump, the filter, the electro-hydraulic reversing valve, the balance valve group, and the cutter head driving motor are sequentially arranged and connected in the hydraulic oil pumping direction; two output ends of the balance valve group are respectively connected to L and R oil ports on two sides of the cutter head driving motor, and an oil outlet side of the cutter head driving motor is communicated with the hydraulic oil tank; and the driving motor is connected to the variable pump.

[0014] Further, the shield tunneling machine cutter head driving hydraulic energy recovery system further comprises a cutter head driving energy recovery button connected to the controller to directly start the cutter head driving energy recovery mode when the cutter head driving energy recovery button is pressed.

[0015] According to another aspect of the present application, a shield tunneling machine is also provided with the shield tunneling machine cutter head driving hydraulic energy recovery system as described in any one of the above.

[0016] The present application has the following advantages: The cutter head needs a certain time from starting braking to completely stopping in the cutter head deceleration or braking condition, and the kinetic energy changes in the cutter head deceleration or braking process, in order to fully utilize the kinetic energy during cutter head braking, the present application utilizes the hydraulic energy recovery technology to convert and recover the kinetic energy of the cutter head to improve the energy utilization efficiency of the shield tunneling machine, in the working process, the detector group first recognizes the running state change of the cutter head driving motor and transmits it to the controller, the controller determines the recoverable state of the cutter head driving motor energy and defines the energy recovery mode after program judgment, and the kinetic energy of the cutter head driving deceleration and braking is recovered and stored in the energy recovery mode, so that the program operation has high automation degree, the cutter head driving energy recovery mode is started in time, and the energy recovery is timely and efficient; in the cutter head driving energy recovery condition, the on-off of the energy recovery oil circuit is controlled through the switching of the electro-hydraulic reversing valve and the energy conversion recovery system, the high-pressure oil on the high-pressure side of the cutter head driving motor is directly led out through the energy conversion recovery system to recover the energy, the recoverable energy of the high-pressure oil is maximized, the energy recovery efficiency is improved, the cutter head driving deceleration action does not consume additional energy in the recoverable energy area of the cutter head driving motor in the energy recovery mode in the cutter head deceleration or braking condition, but the kinetic energy of the cutter head deceleration or braking itself is used for action, and the kinetic energy is recovered and stored in the action process, so that the purpose of energy recovery is achieved, and the hydraulic system of the present application is more energy-saving and efficient than the existing scheme.

[0017] In addition to the above-described objects, features and advantages, the present application has other objects, features and advantages. The present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the application and are incorporated herein for a description of the application and are not intended on the definition of the application. In the drawings: Figure 1 is a schematic diagram of a first embodiment of a shield machine cutter drive hydraulic energy recovery system according to a preferred embodiment of the present application; Figure 2 is a schematic diagram of a second embodiment of a shield machine cutter drive hydraulic energy recovery system according to a preferred embodiment of the present application.

[0019] LEGEND 1, hydraulic oil tank; 2, second overflow valve; 3, variable pump; 4, drive motor; 5, filter; 6, electro-hydraulic reversing valve; 7, balance valve group; 8, cutter drive motor; 9, first electromagnetic ball valve; 10, second electromagnetic ball valve; 11, energy conversion motor; 12, generator; 13, capacitor; 14, oil storage tank; 15, second pressure detector; 16, first pressure detector; 17, speed detector; 18, controller; 19, accumulator; 20, pressure gauge; 21, first overflow valve; 22, pressure relief ball valve; 23, check valve. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail below with reference to the drawings, but the present application can be implemented in various different ways as defined and covered by the following description.

[0021] Referring to Figure 1 and Figure 2 , a preferred embodiment of the present application provides a shield machine cutter drive hydraulic energy recovery system, which comprises a cutter drive system for driving the cutter to rotate in forward and reverse directions, a detector group, an energy conversion recovery system, and a controller 18 connected to the cutter drive system, the detector group, and the energy conversion recovery system. The cutter drive system comprises a cutter drive motor 8 for driving the cutter to rotate, and an electro-hydraulic reversing valve 6 for changing the oil supply direction to correspondingly control the cutter drive motor 8 to rotate in forward or reverse directions. The detector group is used to detect the oil pressure on the high pressure side of the cutter drive motor 8 and the rotational speed of the cutter, respectively, and feed back to the controller 18. The controller 18 is used to start the cutter drive energy recovery mode when the oil pressure and the rotational speed both meet the system set requirement values, so as to move the electro-hydraulic reversing valve 6 to the neutral position and turn on the energy conversion recovery system. The energy conversion recovery system is connected to the high pressure side of the cutter drive motor 8, so as to turn on the high pressure oil on the high pressure side of the cutter drive motor 8 in the cutter drive energy recovery mode, and convert and recover the pressure energy of the extracted high pressure oil.

[0022] The working principle of the present application is shown in the accompanying drawings Figure 1 and 2 Detailed description is given as follows, and the working principle is shown in the accompanying drawings Figure 1 and the accompanying drawings Figure 2 As shown in the accompanying drawings, the detector group feeds back the oil pressure of the high pressure side of the cutter driving motor 8 and the rotating speed of the cutter to the controller 18, and the controller 18 is used to start the cutter driving energy recovery mode when the received oil pressure value and rotating speed value meet the preset trigger value, at this time, the controller 18 drives the electro-hydraulic reversing valve 6 to move to the middle position, and makes the energy conversion recovery system conductive, in this mode, the energy of the cutter can be recovered and stored, and the specific working principle is described as follows: When the cutter is in the positive rotation state, and the detector group detects that the cutter is in the deceleration state or braking state through the feedback of the detection value, the controller 18 judges whether the cutter driving energy recovery mode condition is met, and enters the cutter driving energy recovery mode when the condition is met. The controller 18 outputs the control signal to the electro-hydraulic reversing valve 6 and the energy conversion recovery system, at this time, the cutter driving motor 8 continues to rotate in the positive direction under the action of inertia, and the energy conversion recovery system is powered on and the electro-hydraulic reversing valve 6 is moved to the middle position. At this time, the flow direction of the high pressure side oil is that the oil of the high pressure oil port of the cutter driving motor 8 flows into the energy conversion recovery system under the action of the inertia torque, and the energy conversion recovery system is used for energy conversion and storage, and the flow direction of the low pressure side oil is that the oil flows into the low pressure oil port of the cutter driving motor 8 through the container for storing oil in the cutter driving system and the electro-hydraulic reversing valve 6. When the cutter driving motor 8 completely stops, the detector group feeds back the detected signal to the controller 18, and the controller 18 automatically exits the cutter driving energy recovery mode after program judgment, at this time, the cutter driving energy recovery mode ends. When the cutter is in the reverse rotation state, the working process is similar to that in the positive rotation state, except that the high pressure oil side and the low pressure oil side of the cutter driving motor 8 are transposed, and the rest of the working process is the same, which is not repeated here.

[0023] The cutter head needs a certain time from starting braking to completely stopping in the cutter head deceleration or braking condition, and the kinetic energy changes in the cutter head during deceleration or braking. In order to fully utilize the kinetic energy of the cutter head during braking, the hydraulic energy recovery technology is used to convert and recover the kinetic energy of the cutter head to improve the energy utilization efficiency of the shield machine. During work, the detector group first identifies the running state change of the cutter head drive motor 8 and transmits it to the controller 18. After the program of the controller 18 is judged, the recoverable state of the energy of the cutter head drive motor 8 is determined and the energy recovery mode is defined. The kinetic energy of the cutter head drive deceleration and braking is recovered and stored in the energy recovery mode, so that the program operation has high automation degree, the cutter head drive energy recovery mode is opened in time, and the energy recovery is timely and efficient. In the cutter head drive energy recovery condition, the on-off of the energy recovery oil circuit is controlled through the switching of the electro-hydraulic reversing valve 6 and the energy conversion recovery system, so as to avoid that the high-pressure oil on the high-pressure side of the cutter head drive motor 8 is consumed by the cutter head drive system and then recovered, but the high-pressure oil on the high-pressure side of the cutter head drive motor 8 is directly led out through the energy conversion recovery system and then recovered, so that the recoverable energy of the high-pressure oil is maximized and the energy recovery efficiency is improved. When the cutter head drive motor 8 is in the recoverable energy area and the energy recovery mode is used in the cutter head deceleration or braking condition, the deceleration action of the cutter head drive does not consume additional energy of the system, but uses the kinetic energy of the cutter head deceleration or braking itself to act, and the kinetic energy is recovered and stored during the action process, so as to achieve the purpose of energy recovery. Therefore, the hydraulic system of the present scheme is more energy-saving and efficient than the existing scheme.

[0024] Optionally, as shown in Figure 1 , the energy conversion recovery system includes a high-pressure oil leading-out circuit and an energy conversion recovery circuit. The inlet end of the high-pressure oil leading-out circuit is connected to the high-pressure side of the cutter head drive motor 8, and the outlet end of the high-pressure oil leading-out circuit is connected to the inlet end of the energy conversion recovery circuit to conduct when the cutter head drive energy recovery mode is used to lead out the high-pressure oil on the high-pressure side of the cutter head drive motor 8. The energy conversion recovery circuit is used to convert the pressure energy of the high-pressure oil into electrical energy storage, and to recover the low-pressure oil formed after energy conversion, or the energy conversion recovery circuit is used to directly store the pressure energy of the high-pressure oil, and to recover the low-pressure oil formed after energy conversion.

[0025] In this optional scheme, as shown in Figure 1 and Figure 2As shown, the high-pressure oil outlet circuit includes a first outlet oil path and a second outlet oil path. The first outlet oil path includes an L-port connecting the cutter head drive motor 8 and a first outlet pipe connected to the energy conversion and recovery circuit, and a first solenoid ball valve 9 installed in the first outlet pipe. The second outlet oil path includes an R-port connecting the cutter head drive motor 8 and a second outlet pipe connected to the energy conversion and recovery circuit, and a second solenoid ball valve 10 installed in the second outlet pipe. During operation, since the cutter head can rotate forward or backward under the action of the cutter head drive system, the two oil ports of the cutter head drive motor 8 can be correspondingly high-pressure oil ports. In this optional scheme, such as... Figure 1 As shown, the L port of the cutter head drive motor 8 is defined as the high-pressure oil port when the cutter head rotates forward, and the R port of the cutter head drive motor 8 is defined as the high-pressure oil port when the cutter head rotates backward. At this time, the high-pressure oil lead-out circuit needs to include two circuits, namely the first lead-out oil circuit and the second lead-out oil circuit. When the cutter head rotates forward for energy recovery, the first lead-out oil circuit is opened to lead out high-pressure oil, while the second lead-out oil circuit is closed so that the oil can enter from the low-pressure side of the cutter head drive motor 8 for replenishment. Similarly, when the cutter head rotates backward for energy recovery, the second lead-out oil circuit is opened to lead out high-pressure oil, while the first lead-out oil circuit is closed so that the oil can enter through the low-pressure oil port for replenishment.

[0026] Optionally, such as Figure 1 and Figure 2 As shown, the detector group includes a first pressure detector 16 and a second pressure detector 15 for detecting the pressure at the L and R oil ports on both sides of the cutter head drive motor 8, respectively, and a speed detector 17 for detecting the rotational speed of the cutter head. The first pressure detector 16, the second pressure detector 15, and the speed detector 17 are respectively connected to the controller 18. When the cutter head rotates forward, the first pressure detector 16 works in conjunction with the speed detector 17 to detect whether the cutter head is in a deceleration or braking state; when the cutter head rotates in reverse, the second pressure detector 15 works in conjunction with the speed detector 17 to detect whether the cutter head is in a deceleration or braking state.

[0027] Optionally, a first embodiment of the energy conversion and recovery loop, such as Figure 1 As shown, the energy conversion and recovery circuit includes an energy conversion motor 11 for converting the pressure energy of high-pressure oil into mechanical energy, a generator 12 for generating electricity driven by the energy conversion motor 11, and a capacitor 13 for storing electrical energy. The oil inlet side of the energy conversion motor 11 is connected to the outlet ends of both the first and second outlet pipes via a first oil outlet pipe. The oil outlet side of the energy conversion motor 11 is connected to an oil storage tank 14 for low-pressure oil storage. The generator 12 is connected to the energy conversion motor 11, and the capacitor 13 is connected to the generator 12.

[0028] like Figure 1 As shown, the working principle of Embodiment 1 of the present invention is as follows: When the cutterhead is in the positive rotation state, and the second pressure detector 15, the first pressure detector 16 and the speed detector 17 detect that the cutterhead is in the deceleration state or the braking state, the controller 18 judges whether the cutterhead driving energy recovery mode condition is met, and enters the cutterhead driving energy recovery mode when the condition is met. The controller 18 outputs the control signal to the electro-hydraulic reversing valve 6 and the first electromagnetic ball valve 9, and the cutterhead driving motor 8 continues to rotate in the positive direction under the action of the inertia. The electromagnet a1 of the first electromagnetic ball valve 9 is powered, and the electro-hydraulic reversing valve 6 and the second electromagnetic ball valve 10 are in the power-off state. The first leading oil circuit is connected, the second leading circuit is closed, and the electro-hydraulic reversing valve 6 works in the middle state. ① The flow direction of the oil liquid on the high-pressure side is that the oil liquid in the L oil port of the cutterhead driving motor 8 flows under the action of the inertial torque, wherein the oil liquid in the L oil port of the cutterhead driving motor 8 enters the A3 oil port and the B3 oil port of the energy conversion motor 11 through the L1 oil port and the L2 oil port of the first electromagnetic ball valve 9, and then returns to the oil tank 14 and drives the energy conversion motor 11 to rotate. The rotating energy conversion motor 11 drives the generator 12 to generate electricity, and the generated electricity is stored in the capacitor 13 and then used by other power-consuming elements. ② The flow direction of the oil liquid on the low-pressure side is that the oil liquid enters the R oil port of the cutterhead driving motor 8 through the T2 oil port and the A2 oil port of the electro-hydraulic reversing valve 6 to supplement the oil. When the cutterhead driving motor 8 completely stops, the motor signals detected by the second pressure detector 15, the first pressure detector 16 and the speed detector 17 are fed back to the controller 18, the controller 18 automatically exits the energy recovery mode after program judgment, and the first leading oil circuit is closed again. At this time, the energy recovery mode ends.

[0029] When the second pressure detector 15, the first pressure detector 16 and the speed detector 17 detect that the cutterhead is in deceleration or braking state through the feedback of the detected values, the controller 18 judges whether the cutterhead driving energy recovery mode condition is met, and enters the cutterhead driving energy recovery mode when the condition is met. The controller 18 outputs control signals to the electro-hydraulic reversing valve 6 and the second electromagnetic ball valve 10, and the cutterhead driving motor 8 continues to rotate reversely under the action of inertia. The electromagnet a2 of the second electromagnetic ball valve 10 is powered, and the electro-hydraulic reversing valve 6 and the first electromagnetic ball valve 9 are in the unpowered state. The second leading oil circuit is connected, the first leading oil circuit is closed, and the electro-hydraulic reversing valve 6 works in the middle state. ① The flow direction of the high-pressure oil is that the oil in the R oil port of the cutterhead driving motor 8 flows under the action of the inertial torque, wherein the oil in the R oil port of the cutterhead driving motor 8 enters the A3 oil port and the B3 oil port of the energy conversion motor 11 through the R1 oil port and the R2 oil port of the second electromagnetic ball valve 10, returns to the oil tank 14 and drives the energy conversion motor 11 to rotate, the rotating energy conversion motor 11 drives the generator 12 to generate electricity, and the generated electricity is stored in the capacitor 13 and then used by other power-consuming elements. ② The flow direction of the low-pressure oil is that the oil enters the L oil port of the cutterhead driving motor 8 through the T2 oil port and the B2 oil port of the electro-hydraulic reversing valve 6 to supplement the oil. When the cutterhead driving motor 8 completely stops, the motor signals detected by the second pressure detector 15, the first pressure detector 16 and the speed detector 17 are fed back to the controller 18, the controller 18 automatically exits the energy recovery mode after program judgment, the second leading oil circuit is closed again, and the energy recovery mode ends.

[0030] Alternatively, the second embodiment of the energy conversion recovery circuit is shown in Figure 2 The energy conversion recovery circuit includes an accumulator 19 for storing high-pressure oil and a first overflow circuit for overflowing the excess high-pressure oil. The accumulator 19 is connected to the oil outlet ends of the first leading pipe and the second leading pipe through the second oil outlet pipe. The first overflow circuit includes a first overflow pipe, the oil tank 14 connected to the oil outlet end of the first overflow pipe, and a first overflow valve 21 arranged in the first overflow pipe. The oil inlet end of the first overflow pipe is connected to the second oil outlet pipe. When the cutterhead rotates forward, the oil in the L oil port of the cutterhead driving motor 8 enters the accumulator 19 for storage through the L1 oil port and the L2 oil port of the first electromagnetic ball valve 9 and the second oil outlet pipe, and the excess high-pressure oil overflows to the oil tank 14 through the first overflow valve 21 in the first overflow circuit; when the cutterhead rotates reversely, the oil in the R oil port of the cutterhead driving motor 8 enters the accumulator 19 for storage through the R1 oil port and the R2 oil port of the second electromagnetic ball valve 10 and the second oil outlet pipe, and the excess high-pressure oil overflows to the oil tank 14 through the first overflow valve 21 in the first overflow circuit.

[0031] Preferably, as shown in Figure 2 The energy conversion recovery circuit further comprises a pressure relief circuit, which comprises a pressure relief pipe, an oil storage tank 14 connected to the oil outlet end of the pressure relief pipe, a pressure gauge 20 and a pressure relief ball valve 22 arranged in the pipeline of the pressure relief pipe in sequence. The oil inlet end of the pressure relief pipe is connected to the second oil outlet pipe. In operation, when the accumulator 19 malfunctions, the high-pressure oil can be directly discharged to the oil storage tank 14 through the pressure relief circuit, thereby protecting the entire system.

[0032] Optionally, as shown in Figure 1 and Figure 2 The cutter head driving system comprises a hydraulic oil tank 1 for containing hydraulic oil, a variable pump 3 for pumping hydraulic oil, a driving motor 4 for driving the variable pump 3 to operate, a filter 5 for filtering the pumped hydraulic oil, an electro-hydraulic reversing valve 6, a balance valve group 7 for preventing the cutter head from rotating under load, and a cutter head driving motor 8. The hydraulic oil tank 1, the variable pump 3, the filter 5, the electro-hydraulic reversing valve 6, the balance valve group 7, and the cutter head driving motor 8 are arranged in sequence and connected in the hydraulic oil pumping direction. The two output ends of the balance valve group 7 are respectively connected to the L oil port and the R oil port on both sides of the cutter head driving motor 8, and the oil outlet side of the cutter head driving motor 8 is communicated with the hydraulic oil tank 1. The driving motor 4 is connected to the variable pump 3. When the cutter head rotates forward, the oil flow direction on the low-pressure side is: the oil in the hydraulic oil tank 1 flows through the T2 and A2 oil ports of the electro-hydraulic reversing valve 6, enters the R oil port of the cutter head driving motor 8 through the V1 and C1 oil ports of the balance valve group 7, and performs oil supplement; when the cutter head rotates reversely, the oil flow direction on the low-pressure side is: the oil in the hydraulic oil tank 1 flows through the T2 and B2 oil ports of the electro-hydraulic reversing valve 6, enters the L oil port of the cutter head driving motor 8 through the V2 and C2 oil ports of the balance valve group 7, and performs oil supplement. In this optional scheme, in order to improve the energy recovery efficiency, the balance valve oil circuit of the cutter head driving motor 8 is short-circuited in the cutter head driving energy recovery mode, that is, the high-pressure oil on the high-pressure side of the cutter head driving motor 8 is directly led out through the first leading oil circuit or the second leading oil circuit without passing through the balance valve group 7 again, thereby avoiding the consumption of energy by the balance valve group 7, making the energy as much as possible to be recovered, and further improving the energy recovery efficiency.

[0033] Preferably, as shown in Figure 1 and Figure 2 The cutter head driving system further comprises a second overflow circuit, the oil inlet end of the second overflow circuit is connected to the oil circuit between the variable pump 3 and the filter 5, the oil outlet end of the second overflow circuit is connected to the hydraulic oil tank 1, and a second overflow valve 2 is arranged in the second overflow circuit, which is used to limit the safety pressure of the hydraulic system.

[0034] Preferably, as shown in Figure 2As shown, in the second embodiment of the energy conversion recovery circuit, the second oil outlet pipe is also connected to the pipe between the filter 5 and the electro-hydraulic reversing valve 6 through a connecting pipe to balance the pressure, and a one-way valve 23 is arranged in the pipe between the filter 5 and the electro-hydraulic reversing valve 6 to prevent the excess high-pressure oil in the accumulator 19 from flowing back to the filter 5 and the variable pump 3.

[0035] Preferably, the shield machine cutter drive hydraulic energy recovery system further comprises a cutter drive energy recovery button connected to the controller 18 to directly start the cutter drive energy recovery mode by the controller 18 after the cutter drive energy recovery button is pressed, so that the cutter drive energy recovery mode can be directly started manually according to the needs, and the use is flexible.

[0036] The preferred embodiment of the present application also provides a shield machine having the shield machine cutter drive hydraulic energy recovery system as described in any one of the above, so that the shield machine of the present application can convert and recover the kinetic energy of the cutter by using the hydraulic energy recovery technology to improve the energy utilization efficiency of the shield machine, and the cutter drive energy recovery mode is started in time, and the energy recovery is in time and efficient.

[0037] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A shield tunneling machine cutterhead drive hydraulic energy recovery system, characterized in that, The shield machine cutter driving hydraulic energy recovery system comprises a cutter driving system, a detector group, an energy conversion recovery system, and a controller (18) connected with the cutter driving system, the detector group, and the energy conversion recovery system. The cutter driving system comprises a cutter driving motor (8) for driving the cutter to rotate and an electro-hydraulic reversing valve (6) for changing the oil supply direction to correspondingly control the cutter driving motor (8) to rotate in the forward direction or the reverse direction. The detector group is used for detecting the oil pressure on the high-pressure side of the cutter driving motor (8) and the rotating speed of the cutter respectively and feeding back to the controller (18), and the controller (18) is used for starting the cutter driving energy recovery mode when the oil pressure and the rotating speed both meet the system set requirement value, so that the electro-hydraulic reversing valve (6) moves to the neutral position and the energy conversion recovery system is turned on. The energy conversion recovery system is connected with the high-pressure side of the cutter driving motor (8) to lead out the high-pressure oil on the high-pressure side of the cutter driving motor (8) when the cutter driving energy recovery mode is started and convert the pressure energy of the led-out high-pressure oil to recover.

2. The shield machine cutter driving hydraulic energy recovery system according to claim 1, wherein the energy conversion recovery system comprises a high-pressure oil leading-out circuit and an energy conversion recovery circuit. The high-pressure oil leading-out circuit is connected with the high-pressure side of the cutter driving motor (8), and the oil outlet end of the high-pressure oil leading-out circuit is connected with the oil inlet end of the energy conversion recovery circuit to be turned on to lead out the high-pressure oil on the high-pressure side of the cutter driving motor (8) when the cutter driving energy recovery mode is started. The energy conversion recovery circuit is used for converting the pressure energy of the high-pressure oil into electric energy to store and recovering the low-pressure oil formed after energy conversion, or the energy conversion recovery circuit is used for directly storing the pressure energy of the high-pressure oil and recovering the low-pressure oil formed after energy conversion.

3. The shield machine cutter driving hydraulic energy recovery system according to claim 2, wherein the high-pressure oil leading-out circuit comprises a first leading-out oil circuit and a second leading-out oil circuit. The first leading-out oil circuit comprises a first leading-out pipe connected with the L oil port of the cutter driving motor (8) and the energy conversion recovery circuit and a first electromagnetic ball valve (9) arranged in the first leading-out pipe. The second leading-out oil circuit comprises a second leading-out pipe connected with the R oil port of the cutter driving motor (8) and the energy conversion recovery circuit and a second electromagnetic ball valve (10) arranged in the second leading-out pipe.

4. The shield machine cutter driving hydraulic energy recovery system according to claim 3, wherein the detector group comprises a first pressure detector (16) and a second pressure detector (15) for respectively detecting the pressures of the L oil port and the R oil port of the cutter driving motor (8) and a speed detector (17) for detecting the rotating speed of the cutter. The first pressure detector (16), the second pressure detector (15), and the speed detector (17) are respectively connected with the controller (18).

5. The shield machine cutter driving hydraulic energy recovery system according to claim 3, wherein ​ ​ ​ ​ The energy conversion recovery circuit comprises an energy conversion motor (11) for converting the pressure energy of the high-pressure oil into mechanical energy, a generator (12) for generating electricity under the drive of the energy conversion motor (11), and a capacitor (13) for storing the electrical energy; The oil inlet side of the energy conversion motor (11) is connected to the oil outlet ends of both the first and second outlet pipes through a first oil outlet pipe, and the oil outlet side of the energy conversion motor (11) is communicated with the oil storage tank (14) for low-pressure oil storage; The generator (12) is connected to the energy conversion motor (11), and the capacitor (13) is connected to the generator (12).

6. The shield tunneling machine cutterhead drive hydraulic energy recovery system according to claim 3, wherein The energy conversion recovery circuit comprises an accumulator (19) for storing high-pressure oil, and a first overflow circuit for overflowing excess high-pressure oil; The accumulator (19) is connected to the oil outlet ends of both the first and second outlet pipes through a second oil outlet pipe; The first overflow circuit comprises a first overflow pipe, an oil storage tank (14) connected to the oil outlet end of the first overflow pipe, and a first overflow valve (21) arranged in the pipeline of the first overflow pipe, and the oil inlet end of the first overflow pipe is connected to the second oil outlet pipe.

7. The shield tunneling machine cutterhead drive hydraulic energy recovery system according to claim 6, wherein The energy conversion recovery circuit further comprises a pressure relief circuit, which comprises a pressure relief pipe, an oil storage tank (14) connected to the oil outlet end of the pressure relief pipe, and a pressure gauge (20) and a pressure relief ball valve (22) arranged in the pipeline of the pressure relief pipe in sequence; The oil inlet end of the pressure relief pipe is connected to the second oil outlet pipe.

8. The shield tunneling machine cutterhead drive hydraulic energy recovery system according to claim 1, wherein The cutterhead drive system comprises a hydraulic oil tank (1) for containing hydraulic oil, a variable pump (3) for pumping hydraulic oil, a drive motor (4) for driving the variable pump (3) to operate, a filter (5) for filtering the pumped hydraulic oil, an electro-hydraulic reversing valve (6), a balance valve group (7) for preventing the load from causing the cutterhead to rotate, and a cutterhead drive motor (8); The hydraulic oil tank (1), the variable pump (3), the filter (5), the electro-hydraulic reversing valve (6), the balance valve group (7), and the cutterhead drive motor (8) are arranged in sequence and connected in the direction of hydraulic oil pumping; The two output ends of the balance valve group (7) are respectively connected to the L oil port and the R oil port on both sides of the cutterhead drive motor (8), and the oil outlet side of the cutterhead drive motor (8) is communicated with the hydraulic oil tank (1); The drive motor (4) is connected to the variable pump (3).

9. The shield tunneling machine cutterhead drive hydraulic energy recovery system according to claim 8, wherein The shield tunneling machine cutterhead drive hydraulic energy recovery system further comprises a cutterhead drive energy recovery button, which is connected to the controller (18) to directly start the cutterhead drive energy recovery mode when the cutterhead drive energy recovery button is pressed.

10. A tunneling machine characterized by, The shield tunneling machine cutterhead drive hydraulic energy recovery system according to any one of claims 1-9.

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