KR20230058651A - Blade hoisting tool and its hydraulic system - Google Patents

Abstract

Blade hoisting tools and their hydraulic systems. The hydraulic system drives hydraulic oil in the hydraulic system to form an oil supply path and an oil return path, and supplies oil to an oil cylinder through the oil supply path or discharges hydraulic oil in the oil cylinder through an oil return path. unit 4, 04, the oil cylinder comprising a first oil cylinder 115, a second oil cylinder 117, and a third oil cylinder 1182; a first pressure holding unit connected between the first oil cylinder 115 and the drive units 4 and 04 to enable oil supply and oil return of the first oil cylinder 115; a second pressure holding unit connected between the second oil cylinder 117 and the drive units 4 and 04 to enable oil supply and oil return of the second oil cylinder 117; a third pressure holding unit connected between the third oil cylinder 1182 and the drive units 4 and 04 to enable oil supply and oil return of the third oil cylinder 1182; And the first valve unit 28, the second valve unit provided in the oil supply path and the oil return path of the first oil cylinder 115, the second oil cylinder 117, and the third oil cylinder 1182, respectively 31), and a third valve unit 35, the first oil cylinder 115, the second oil cylinder 117, and the third oil cylinder 1182 are of the blade hoisting tool for clamping the blade. Used to drive the blade clamp.

Description

Blade hoisting tool and its hydraulic system

This application relates to the field of wind power technology, in particular to blade hoisting tooling and its hydraulic system.

Currently, the blade length of an offshore wind turbine unit exceeds 90 meters and its weight exceeds 35 tons. Due to the weight of the blade, the conventional direct-drive unit barring-gear structure and the conventional double-excitation unit barring-gear structure must withstand more and more loads, so that the end cover structure (connected with the barring) of the generator during the barring process Deformations result, which in turn affect the normal operation of the wind turbine unit. In addition, since the length of the blade is long, there is a high risk of overturning when installing a trefoil due to the limitations of the installation vessel.

Currently, the hydraulic system of the blade hoisting tooling cannot guarantee the safety of the blade hoisting process and cannot effectively control the blade rotation. In addition, when the blade starts or stops rotating in the air, the fine motor ability decreases and the resulting impact is great.

The safety of the hydraulic system of the existing blade hoisting tooling is poor, the reliability of the existing blade hoisting tooling including the hydraulic system is poor, and its operating efficiency is low. In addition, conventional blade hoisting tooling cannot immediately adjust the clamping force on the blade.

According to one aspect of the present application, a hydraulic system capable of expanding and retracting by driving three hydraulic cylinders is provided to control a blade clamp for clamping a blade.

According to another aspect of the present application, blade hoisting tooling capable of varying the clamping force on the blade during the blade hoisting process is also provided.

A hydraulic system for blade hoisting tooling according to an aspect of the present application drives hydraulic oil in the hydraulic system to form an oil supply path and an oil return path, and supplies oil to a hydraulic cylinder through the oil supply path or returns oil A drive unit configured to discharge hydraulic oil of a hydraulic cylinder through a path, the hydraulic cylinder comprising a first hydraulic cylinder having a first small chamber and a first large chamber, a second hydraulic cylinder having a second small chamber and a second large chamber, and a third hydraulic cylinder having a third large chamber and a third small chamber; a first pressure maintaining unit connected between the first hydraulic cylinder and the drive unit for oil supply and oil return of the first hydraulic cylinder; a second pressure maintaining unit connected between the second hydraulic cylinder and the drive unit for oil supply and oil return of the second hydraulic cylinder; a third pressure maintaining unit connected between the third hydraulic cylinder and the drive unit for oil supply and oil return of the third hydraulic cylinder; It includes a first valve unit, a second valve unit, and a third valve unit, the first valve unit is arranged in the oil supply path and the oil return path of the first hydraulic cylinder, and the second valve unit is arranged in the oil supply path and the oil return path of the second hydraulic cylinder. are arranged in the oil supply path and the oil return path, and the third valve unit is arranged in the oil supply path and the oil return path of the third hydraulic cylinder; The first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder are configured to drive a blade clamp of the blade hoisting tooling to clamp the blade.

According to another aspect of the present application, blade hoisting tooling comprising a hydraulic system is provided.

According to another aspect of the present application, single blade hoisting tooling is provided. The single blade hoisting tooling includes a hydraulic system for the blade hoisting tooling and further includes a blade clamp. The blade clamp includes an upper clamping assembly comprising a pressure arm and an upper vertical arm extending downwardly from one end of the pressure arm, the pressure arm being pivotable relative to the upper vertical arm; A lower clamping assembly comprising a support arm and a lower vertical arm extending upwardly from one end of the support arm, the lower vertical arm being connected to the upper vertical arm, the upper clamping assembly and the lower clamping assembly forming a space for clamping the blade. -; a first locking assembly configured to lock the upper vertical arm relative to the lower vertical arm; and a second locking assembly including a third hydraulic cylinder configured to lock the pressure arm relative to the upper vertical arm, the first hydraulic cylinder being coupled between the upper vertical arm and the lower vertical arm to drive the upper clamping assembly to configured to adjust the distance between the pressure arm and the support arm by moving relative to the lower clamping assembly; The second hydraulic cylinder is configured to drive and rotate the pressure arm relative to the upper vertical arm, thereby adjusting an inclination angle of the pressure arm relative to the upper vertical arm.

The hydraulic system according to an embodiment of the present application may clamp the blade and control the clamping force within a certain range.

The hydraulic system according to the embodiment of the present application can prevent the oil pressure of the hydraulic system from continuously decreasing due to leakage of hydraulic components.

The hydraulic system according to the embodiment of the present application can avoid impact caused by unstable movement of the clamping hydraulic cylinder.

The blade hoisting tooling according to embodiments of the present application is at least suitable for hoisting one single blade of an offshore wind turbine.

The above and/or other objects and advantages of the present application will become more apparent through the following description of embodiments in conjunction with the drawings.
1 is a schematic diagram of a hydraulic system according to an embodiment of the present application;
2 is a perspective view of a blade hoisting tooling according to an embodiment of the present application;
3 is a perspective view of a blade clamp according to an embodiment of the present application;
4 is a perspective view of a clamping assembly according to a first embodiment of the present application;
5 is an exploded view of a clamping assembly according to a first embodiment of the present application;
6 is a schematic view of a clamping assembly according to a second embodiment of the present application.

The hydraulic system according to an embodiment of the present application may expand and contract by driving three hydraulic cylinders. A hydraulic system according to an embodiment of the present application is suitable for driving a clamping mechanism of a blade hoisting tooling to clamp a blade during a hoisting process.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present application will be described with reference to drawings in which like reference numerals always indicate like elements.

1 is a schematic diagram of a hydraulic system according to an embodiment of the present application.

The hydraulic system according to an embodiment of the present application includes drive units 4 and 04, a first pressure maintaining unit, a second pressure maintaining unit, a third pressure maintaining unit, a first valve unit 28, and a second valve unit 31 ) and a third valve unit 35.

The drive unit 4, 04 can be a power component of a hydraulic system, for example a hydraulic pump. The driving units 4 and 04 drive hydraulic oil in the hydraulic system to form an oil supply path and an oil return path, and supply oil to the hydraulic cylinder through the oil supply path or return hydraulic oil to the hydraulic cylinder through the oil return path. is configured to emit

The hydraulic system according to an embodiment of the present application may expand and contract by driving at least three hydraulic cylinders. For example, the hydraulic system according to the present application may sequentially control the expansion and contraction of three hydraulic cylinders. When the hydraulic system according to the embodiment of the present application includes four or more hydraulic cylinders, the number of locking hydraulic cylinders may be two or more.

According to an embodiment of the present application, the hydraulic cylinder includes three hydraulic cylinders, for example, a first hydraulic cylinder 115, a second hydraulic cylinder 117 and a third hydraulic cylinder 1182 as shown in FIG. include These three hydraulic cylinders are configured to drive the blade clamp of the blade hoisting tooling to clamp the blade.

The first hydraulic cylinder 115 has a first small chamber and a first large chamber, the second hydraulic cylinder 117 has a second small chamber and a second large chamber, and the third hydraulic cylinder 1182 has a third It has a large chamber and a third small chamber, wherein the small chamber is a chamber in which a kind of rod for installing a piston rod is present, and the large chamber is a chamber without a kind of rod.

The first small chamber can be separated from the first large chamber of the first hydraulic cylinder 115 by a piston, and the same applies to the second hydraulic cylinder 117 and the third hydraulic cylinder 1182.

When it is necessary to retract the piston rod of the first hydraulic cylinder 115, oil is supplied to the first small chamber and hydraulic oil in the first large chamber is discharged; When it is necessary to expand the piston rod of the first hydraulic cylinder 115, oil is supplied to the first large chamber and hydraulic oil in the first small chamber is discharged.

Similarly, when it is necessary to retract the piston rod of the second hydraulic cylinder 117, oil is supplied to the second small chamber and hydraulic oil in the second large chamber is discharged; When it is necessary to expand the piston rod of the second hydraulic cylinder 117, oil is supplied to the second large chamber and hydraulic oil in the second small chamber is discharged. Oil supply and oil return methods of the large and small chambers of the third hydraulic cylinder 1182 may be the same as those of the first hydraulic cylinder 115 and the second hydraulic cylinder 117 .

Although two drive units are shown in FIG. 1, the number of drive units is not limited thereto. The drive units 4 and 04 can supply hydraulic oil from the hydraulic oil tank 01 to various components of the hydraulic system. In addition, the hydraulic oil of the hydraulic system may also be collected in a hydraulic oil tank.

A pressure maintaining unit is provided between the hydraulic cylinder and the drive unit so that stable hydraulic oil can be supplied to the first hydraulic cylinder 115 , the second hydraulic cylinder 117 , and the third hydraulic cylinder 1182 .

For example, a first pressure maintaining unit is connected between the first hydraulic cylinder 115 and the driving units 4 and 04 to supply and return oil to the first large chamber and It may communicate with the first small chamber.

A second pressure maintaining unit is connected between the second hydraulic cylinder 117 and the driving units 4 and 04, so that the second large chamber and the second small chamber are provided for oil supply and oil return of the second hydraulic cylinder 117. can be connected with

A third pressure maintaining unit is connected between the third hydraulic cylinder 1182 and the drive units 4 and 04 to supply and return oil to the third large chamber and the third small chamber. can be connected with

In this specification, the term "communication" between two components should be understood to refer to the formation of a flow path of hydraulic oil between the two components, and the two components may be directly or indirectly connected. there is.

The pressure maintaining unit may include a balance valve or a hydraulic locking device. In a hydraulic system provided with a pressure maintaining unit such as a balance valve or a hydraulic locking device, the inclusion of an accumulator can reduce the complexity of the oil path and reduce costs. In the following description, the pressure holding unit is embodied as a hydraulic locking device by way of example.

As shown in FIG. 1 , the first pressure maintaining unit may include a first bi-directional hydraulic locking device 29 arranged in an oil supply path and an oil return path of the first hydraulic cylinder 115 . Similarly, the second pressure holding unit may include second bi-directional hydraulic locking devices 32 arranged in the oil supply path and the oil return path of the second hydraulic cylinder 117; The third pressure maintaining unit may include a third bi-directional hydraulic locking device 36 arranged in an oil supply path and an oil return path of the third hydraulic cylinder 1182 .

The throttle valve may be designed for the oil path of the first hydraulic cylinder 115 . As shown in FIG. 1 , the hydraulic system according to the exemplary embodiment of the present application may further include a first one-way throttle valve 27 and a second one-way throttle valve 41 . The first one-way throttle valve is connected between the first two-way hydraulic locking device 29 and the first large chamber, and the second one-way throttle valve 41 is connected between the first two-way hydraulic locking device 29 and the first small chamber. Connected.

The provision of the throttle valve and the hydraulic locking device can improve the stability of the hydraulic oil of the first hydraulic cylinder, and the stability of the expansion and contraction of the first hydraulic cylinder due to the pressure holding ability.

Also, a dual design can be applied to the first hydraulic cylinder. The dual oil path of the first hydraulic cylinder may be the same as the main oil path of the first hydraulic cylinder, which will not be described in detail herein. Alternatively, the hydraulic locking device of the dual oil path of the first hydraulic cylinder may be replaced by a balance valve (eg a two-way balance valve).

As described above, the balance valve may also be applied to the main oil path of the first hydraulic cylinder. For example, the hydraulic locking device in the main oil path of the first hydraulic cylinder can be replaced by a two-way balance valve or two independent one-way balance valves. The balance valve can be firmly connected to the large and small chambers of the hydraulic cylinder. The two balance valves are independent of each other, which does not mean that there is no flow of hydraulic oil between these two balance valves, but rather that the two balance valves are two separately manufactured components. The connection between the pressure maintaining component and the large and small chambers of the hydraulic cylinder may be tight.

As shown in Fig. 1, the first valve unit 28, the second valve unit 31 and the third valve unit 35 may all be arranged in the oil supply path and the oil return path. For example, the first valve unit 28 may be arranged in both the oil supply path and the oil return path of the first hydraulic cylinder 115 . Similarly, the second valve unit 31 may be arranged in both the oil supply path and the oil return path of the second hydraulic cylinder 117 . The third valve unit 35 may be arranged in both the oil supply path and the oil return path of the third hydraulic cylinder 1182 .

Specifically, the first valve unit 28 may be connected between the first two-way hydraulic locking device 29 and the driving units 4, 04; The second valve unit 31 can be connected between the second two-way hydraulic locking device 32 and the driving units 4, 04; The third valve unit 35 may be connected between the third bi-directional hydraulic locking device 36 and the driving units 4, 04.

The first valve unit 28, the second valve unit 31 and the third valve unit 35 may be configured as a single hydraulic valve, may be configured as a unit comprising a plurality of hydraulic valves, or may be configured as a unit comprising a plurality of hydraulic valves. It may be configured as an independent component in which the valve is integrated. The first valve unit 28 , the second valve unit 31 , and the third valve unit 35 may include reversing valves (eg, electrical proportional reversing valves). The first valve unit 28, the second valve unit 31 and the third valve unit 35 may all include multi-position multi-way reversing valves.

The first valve unit 28 includes a first electrical proportional reversing valve, the second valve unit 31 includes a second electrical proportional reversing valve, and the third valve unit 35 includes a third electrical proportional reversing valve. can include The first electrical proportional reversing valve, the second electrical proportional reversing valve and the third electrical proportional reversing valve may all have a pressure compensator. The first valve unit 28, the second valve unit 31 and the third valve unit 35 may also be conventional reversing valves. The first valve unit 28 may include a first 3-position 4-way reversing valve, the second valve unit 31 may include a second 3-position 4-way reversing valve, and the third valve unit 35 may include a second 3-position 4-way reversing valve. ) may include a third three-position four-way reversing valve.

The first 3-position 4-way reversing valve may have a first P port, a first T port, a first A port and a first B port. The second 3-position 4-way reversing valve may have a second P port, a second T port, a second A port and a second B port. The third 3-position 4-way reversing valve may have a third P port, a third T port, a third A port and a third B port.

The first P port, the second P port and the third P port can communicate with the driving units 4 and 04; The first T port, the second T port and the third T port can communicate with the hydraulic oil tank of the hydraulic system; The first A port, the second A port, and the third A port are respectively the A1 port of the first two-way hydraulic locking device 29, the A1 port of the second two-way hydraulic locking device 32, and the third two-way hydraulic locking device ( 36) may be connected to the A1 port; The first B port, the second B port, and the third B port are respectively the B1 port of the first two-way hydraulic locking device 29, the B1 port of the second two-way hydraulic locking device 32, and the third two-way hydraulic locking device ( 36) can be connected to the B1 port; The A2 port of the first two-way hydraulic locking device 29, the A2 port of the second two-way hydraulic locking device 32, and the A2 port of the third two-way hydraulic locking device 36 are respectively the first small chamber and the second small chamber and communicate with the third small chamber; The B2 port of the first two-way hydraulic locking device 29, the B2 port of the second two-way hydraulic locking device 32, and the B2 port of the third two-way hydraulic locking device 36 are respectively the first large chamber and the second large chamber And it may be in communication with the third large chamber.

The valve unit and the pressure maintaining unit can be considered as hydraulic components on the hydraulic cylinder side. An oil supply inlet of the valve unit may have a common node (eg, a first common node F).

As shown in Fig. 1, when it is necessary to expand the first hydraulic cylinder 115, the first valve unit 28, which is a three-position four-way reversing valve, is energized and switched to the left, and at this time, the first valve unit 28 is powered and turned to the left. The first P port of the one-valve unit 28 communicates with the first B port, the first A port communicates with the first T port, and the oil supply path is: drive unit → first P port → first B port → the first two-way hydraulic locking device 29 → the first one-way throttle valve 27 → becomes the first large chamber, the oil return path is the first small chamber → the second one-way throttle valve 41 → the first A port → 1st T port → becomes a hydraulic oil tank.

When it is necessary to retract the first hydraulic cylinder 115, the first valve unit 28 is energized and turned to the right, at this time the first P port communicates with the first A port, and the first B port The port communicates with the first T port, and the oil supply path is: the drive unit → the first P port → the first A port → the first two-way hydraulic locking device 29 → the second one-way throttle valve 41 → the first socket chamber, and the oil return path is the first large chamber → the first one-way throttle valve 27 → the first two-way hydraulic locking device 29 → the first B port → the first T port → the hydraulic oil tank.

When it is necessary to expand the second hydraulic cylinder 117, the second valve unit 31, which is a three-position, four-way reversing valve, is energized and turned to the left, and at this time, the second valve unit 31 The 2 P port is in communication with the 2 B port, the 2 A port is in communication with the 2 T port, the oil supply path is, the drive unit → the 2nd P port → the 2nd B port → the second two-way hydraulic locking device ( 32) → becomes the second large chamber, and the oil return path becomes the second small chamber → the second two-way hydraulic locking device 32 → the second A port → the second T port → the hydraulic oil tank.

When it is necessary to retract the second hydraulic cylinder 117, the second valve unit 31 is powered and turned to the right, at this time the second P port communicates with the second A port, and the second B port The port communicates with the second T port, the oil supply path is the drive unit → the second P port → the second A port → the second two-way hydraulic locking device 32 → the first small chamber, and the oil return path is, The second large chamber → the second two-way hydraulic locking device 32 → the second B port → the second T port → becomes a hydraulic oil tank.

An oil supply and oil return method for expanding and contracting the third hydraulic cylinder 1182 may be the same as that of the second hydraulic cylinder 117, and this is not repeated herein.

According to the embodiment of the present application, the hydraulic system controls the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder to operate in order, the drive units 4, 04, the first valve unit 28, It may further include a control unit configured to control the second valve unit 31 and the third valve unit 35 . For example, the first hydraulic cylinder 115 and the second hydraulic cylinder 117 can be first controlled to reach a preset position, and then the third hydraulic cylinder 1182 is extended to clamp the blade hoisting tooling's clamping mechanism. It can be controlled to lock. In this specification, the preset positions of the first hydraulic cylinder 115 and the second hydraulic cylinder 117 may be determined according to the dimensions of the blade (eg, the diameter of the blade at the position to be clamped). For example, reaching the preset position of the first hydraulic cylinder 115 means that the first hydraulic cylinder 115 has been moved to a position where the opening of the upper and lower clamping assemblies is sufficient to accommodate the blade. This means that when the second hydraulic cylinder 117 reaches the preset position, the second hydraulic cylinder 117 has sufficient clamping force of the upper clamping assembly and the lower clamping assembly against the blade to ensure normal hoisting of the blade. This means that it has been moved to a location. The first hydraulic cylinder 115 may move first and then the second hydraulic cylinder 117 may be controlled to move. Alternatively, the first hydraulic cylinder 115 and the second hydraulic cylinder 117 may be controlled to move simultaneously. The order of movement of the first hydraulic cylinder and the second hydraulic cylinder may be determined according to actual requirements.

The control unit may be achieved by hardware, such as an integral path, or by a combination of hardware and software. Although the control unit is not specifically shown in the drawing, when a hydraulic system is used to control the hydraulic cylinders of the blade hoisting tooling, the control unit may, for example, be part of the blade hoisting tooling.

In addition, the control unit can control the controllable components of the hydraulic system (e.g., solenoid valves, reversing valves, and drive units) to be powered on or powered off (switching their operating modes), or to issue control commands to the controllable components. transmission to extend or contract the first, second and third hydraulic cylinders to finally control the clamping mechanism of the blade hoisting tooling to clamp the blades.

According to an embodiment of the present application, dual oil paths are designed for the first hydraulic cylinder, the second hydraulic cylinder, and the third hydraulic cylinder to improve the safety of the system.

The oil supply and oil return method of the dual oil route is the same as that of the main oil route. The structure of each dual oil passage is the same as that of the corresponding main oil passage, which will not be repeated herein.

The pressure maintaining unit, valve unit and solenoid valve can be considered as hydraulic components on the hydraulic cylinder side. A dual design can be applied to the hydraulic component and the corresponding oil path on the hydraulic cylinder side. Also, the dual design can be applied to the oil path of the hydraulic oil tank. For example, a check valve may be provided in the oil supply path of the hydraulic pump, and a relief valve may be provided between the oil supply path and the oil return path.

Specifically, the output port of the drive unit 04 may be connected to the inlet of the first check valve 07, and the outlet of the first check valve 07 is the common oil supply node of the valve unit (the first common node F). ) can be connected to Although not shown in the drawings, a first stop valve may be provided between the first check valve 07 and the common oil supply node. A second stop valve may be provided between the second check valve 7 and the common oil supply node.

A first relief valve 6 may be provided between a node located between the first check valve 07 and the drive unit 04 and the oil return path of the hydraulic oil tank. A second relief valve 06 may be provided between the node located between the second check valve 7 and the driving unit 4 and the oil return path of the hydraulic oil tank.

An oil return filter 5 may be provided in the oil return path of the hydraulic oil tank, oil supply filters 02 and 2 may be provided in the oil supply path of the hydraulic oil tank, and an air filter 3 is additionally provided. It may be arranged in a hydraulic oil tank.

Although not shown in the drawings, it should be noted that embodiments of the present application may include various other auxiliary components (eg, stop valves, check valves, pressure sensors, oil filters).

For example, according to an embodiment of the present application, the hydraulic system may further include an accumulator 24 and a pressure sensor 25, both of which are located in the first large chamber of the first hydraulic cylinder 115 and the first It can be connected to the node E between the pressure maintaining units. The accumulator 24 may supplement the oil path of the first hydraulic cylinder with pressure according to the oil pressure detected by the pressure sensor 25 to ensure smooth expansion and contraction of the first hydraulic cylinder.

A hydraulic system according to an embodiment of the present application may be used to extend and retract by driving at least three hydraulic cylinders of blade hoisting tooling. Specifically, a hydraulic system according to an embodiment of the present application may be used to drive a clamping mechanism of blade hoisting tooling to clamp the blade. The following describes blade hoisting tooling (eg, single blade hoisting tooling) for which the hydraulic system of the present application is suitable.

2 is a perspective view of a blade hoisting tooling according to an embodiment of the present application. 3 is a perspective view of a clamping assembly according to an embodiment of the present application. 4 is a perspective view of a clamping assembly according to a first embodiment of the present application. 5 is an exploded view of the clamping assembly according to the first embodiment of the present application. 6 is a schematic view of a clamping assembly according to a second embodiment of the present application.

Blade hoisting tooling according to embodiments of the present application may include a hydraulic system. A hydraulic system can be used to drive the clamping mechanism to clamp the blade, and the clamping force to clamp the blade can be changed.

As shown in FIG. 2 , blade hoisting tooling according to an embodiment of the present application may include a clamping mechanism. The blade hoisting tooling may further include a lifting frame 200, a roughing rotation mechanism 400 and a counterweight unit 1000. The counterweight unit 1000 may be connected to the lifting frame 200 . For example, the counterweight unit 1000 may be fixedly connected to one end of the telescopic member 300 and the other end of the telescopic member 300 may be connected to the lifting frame 200 . The roughing rotation mechanism 400 may be used to adjust the inclination angle or pitching angle of the blade and may be connected to the lifting frame 200 .

The lifting frame 200 may include a boom 210 , a lifting-point connecting jib 220 and a lifting lug 230 . A roughing rotation mechanism 400 may be arranged below the lifting-point connecting jib 220 and connected to the blade clamp. The roughing rotation mechanism 400 may adjust the pitching angle of the blade by driving and rotating the blade clamp in the air.

As shown in FIG. 3 , the clamping mechanism may include a main beam 120 and blade clamps 100 arranged at two ends of the main beam 120 . The blade clamp may include an upper clamping assembly, a lower clamping assembly, a first locking assembly 116 and a second locking assembly 118 .

Also, although not shown, the lifting frame 200 may further include a pitch-varying drive assembly that causes the clamping mechanism to rotate about the shaft with the blades. The variable pitch drive assembly can adjust the pitch of the blades to facilitate installation of the blades.

As shown in FIGS. 3-5 , the upper clamping assembly may include a pressure arm 111 and an upper vertical arm 112 . The press arm 111 is pivotable relative to the upper vertical arm 112 to press the blade. The upper vertical arm 112 may extend downward from one end of the pressure arm 111 . Since the pressure arm 111 is pivotable with respect to the upper vertical arm 112, the blade clamp can be easily clamped by increasing the opening degree of the blade clamp. A pivot shaft 1121 is provided at an upper portion of the upper vertical arm 112 , and the pressure arm 111 is connected to the upper vertical arm 112 via the pivot shaft 1121 .

The lower clamping assembly may include a support arm 113 and a lower vertical arm 114 . The lower vertical arm 114 extends upward from one end of the support arm 113, and the lower vertical arm 114 and the upper vertical arm 112 may be connected to each other. The upper clamping assembly and the lower clamping assembly define a space for clamping the blade.

The first locking assembly 116 is configured to lock the upper vertical arm 112 relative to the lower vertical arm 114, wherein the locking of the upper vertical arm 112 relative to the lower vertical arm 114 comprises the upper and lower clamping assemblies When clamping the blade, it can prevent loosening.

The second locking assembly 118 includes a third hydraulic cylinder 1182 and is configured to lock the pressure arm 111 relative to the upper vertical arm 112 . As described above, since the pressure arm 111 is pivotable, the second locking assembly 118 locks the pressure arm 111 to prevent the pressure arm 111 from opening and closing unexpectedly, and potentially safety reduce the risk

A first hydraulic cylinder 115 is connected between the upper upright arm 112 and the lower upright arm 114 to drive the upper clamping assembly to move it relative to the lower clamping assembly, so that the pressing arm 111 and the support arm 113 The distance between them can be adjusted.

The first hydraulic cylinder 115 may be extended to increase the distance between the upper vertical arm 112 and the lower vertical arm 114, and the first hydraulic cylinder 115 may be contracted to increase the distance between the upper vertical arm 112 and the lower vertical arm 112. The distance between the vertical arms 114 can be reduced.

As shown in FIG. 4 , one end (eg upper end) of the first hydraulic cylinder 115 may be connected to the upper vertical arm 112 and the other end (eg upper vertical arm 112) of the first hydraulic cylinder 115 For example, the lower end) may be connected to the lower vertical arm 114 .

When the upper vertical arm 112 driven by the first hydraulic cylinder 115 reaches a preset position, the upper vertical arm 112 can be locked by the first locking assembly 116 .

The first locking assembly 116 may include a first locking member 1161 , a second locking member 1162 and a first driving member 1163 . The first locking member 1161 is mounted on one of the lower vertical arm 114 and the upper vertical arm 112, and the second locking member 1162 is mounted on the other of the lower vertical arm 114 and the upper vertical arm 112. can be mounted on one.

The second locking member 1162 is arranged to face the first locking member 1161 and may have a locking position and an unlocking position. In the locked position, the second locking member 1162 engages the first locking member 1161 to lock the position of the upper clamping assembly relative to the lower clamping assembly. In the unlocked position, the second locking member 1162 is separated from the first locking member 1161 so that the upper vertical arm 112 can be moved relative to the lower vertical arm 114 .

The first driving member 1163 is connected to the second locking member 1162 and is configured to drive the second locking member 1162 to move it to at least one of a locked position and an unlocked position. In this specification, the first driving member 1163 may be a hydraulic cylinder, and this hydraulic cylinder may be a fourth hydraulic cylinder in addition to the three hydraulic cylinders described above. The fourth hydraulic cylinder is a locking hydraulic cylinder, and its driving oil path may be the same as that of the third hydraulic cylinder 1182 .

As shown in FIG. 4 , the first locking member 1161 may be a long rack extending along the movement direction of the upper vertical arm 112 relative to the lower vertical arm 114, and the second locking member 1162 may be It can be a short rack as opposed to a long rack. The second locking member 1162 is movable in a direction orthogonal to the moving direction of the upper vertical arm 112 relative to the lower vertical arm 114 under the driving of the first driving member 1163 . In the locked position, the short rack and the long rack are engaged with each other, and the short rack is arranged at one end of the first driving member 1163. For example, a short rack may be arranged at one end of the first drive unit member 1163 on which the piston rod is positioned.

The pressure arm 111 is connected to the upper vertical arm 112 via a pivot shaft 1121. In the process of clamping the blade, the second hydraulic cylinder 117 drives the pressure arm 111 to rotate about the pivot shaft 1121 relative to the upper vertical arm 112, so that the upper vertical arm 112 The inclination angle of the pressing arm 111 relative to is changed (eg, the inclination angle may be changed from greater than 90 degrees to less than 90 degrees).

One end (eg, lower end) of the second hydraulic cylinder 117 may be hinged with a lower portion of the upper vertical arm 112, and the other end (eg, upper end) of the second hydraulic cylinder 117 end) may be hinged with an end portion of the pressure arm 111 to drive the pressure arm 111 to rotate about the pivot shaft 1121 relative to the upper vertical arm 112 .

For example, the second hydraulic cylinder 117 can be expanded to increase the inclination angle of the pressure arm 111 relative to the upper vertical arm 112, and the second hydraulic cylinder 117 can be contracted to increase the upper vertical arm ( An inclination angle of the pressure arm 111 relative to 112 may be reduced.

Specifically, the control unit controls the second valve unit 31 to be powered on, for example, the second valve unit 31 is switched to the left, so that the pressure arm 111 for the upper vertical arm 112 can increase the angle of inclination.

When the second hydraulic cylinder 117 reaches a preset position, the second locking assembly 118 restricts the contraction of the second hydraulic cylinder.

In addition to the third hydraulic cylinder 1182, the second locking assembly 118 may further include a stop to limit the second hydraulic cylinder 117 from retracting.

As shown in FIG. 4 , the stop may be a locking wedge 1181 . The locking wedge 1181 has a locked position and an unlocked position. In the locked position, the locking wedge 1181 abuts the upper end of the second hydraulic cylinder 117 to limit the upper end from retracting. In the unlocked position, the locking wedge 1181 is disengaged from the upper end of the second hydraulic cylinder 117. The third hydraulic cylinder 1182 is mounted on the pressure arm 111 and is configured to drive the locking wedge 1181 to move it to at least one of a locked position and an unlocked position.

The locking wedge 1181 may have an inclined surface 1181a. In the locked position, the inclined surface 1181a of the locking wedge 1181 abuts the lower part of the upper end of the second hydraulic cylinder 117 in the contraction direction of the upper end of the second hydraulic cylinder 117, so that the second Limits contraction of the upper end of the hydraulic cylinder 117.

The second locking assembly 118 may further include a support frame 1183 . The support frame 1183 may be mounted on an upper portion of the upper vertical arm 112 . The locking wedge 1181 is mounted on the support frame 1183 and can be moved closer to or away from one end of the second hydraulic cylinder 117 . A groove 1184 may be provided in the support frame 1183 . The groove 1184 extends along the movement path of one end of the second hydraulic cylinder 117 to guide the movement trajectory of one end of the second hydraulic cylinder 117 . Also, the lower end of the groove 1184 supports one end of the second hydraulic cylinder after retraction.

As shown in FIG. 6 , the stop portion may include an eccentric roller 1280 and a blocking plate 1281 . When the second hydraulic cylinder 117 pushes the pressure arm 111 to clamp the blade, the third hydraulic cylinder 1182 drives and moves the eccentric roller 1280, and the eccentric roller 1280 moves to a preset position. When moving, the blocking plate 1281 presses the eccentric roller 1280 to achieve locking of the blade clamping. Conversely, after the installation of the blade is completed, the third hydraulic cylinder 1182 drives the eccentric roller 1280 to move it in the reverse direction, thereby achieving unlocking of the clamping mouse.

Specifically, the control unit controls the third valve unit 35 to be powered on, for example, the third valve unit 35 is switched to the left, thereby controlling the third hydraulic cylinder 1182 to expand, and thereby It can be moved by driving the eccentric roller 1280 according to. The eccentric roller 1280 will be pressed and locked by the blocking plate 1281.

The control unit is configured to control the clamping mechanism to clamp the blade by controlling power supply to the first valve unit 28, the second valve unit 31 and the third valve unit 35; It is configured to control the degree of expansion and contraction of each hydraulic cylinder to adjust the clamping force.

Preferably, blade hoisting tooling (eg, single blade hoisting tooling) according to embodiments of the present application may further include pressure sensors for sensing the clamping force of the upper clamping assembly and the lower clamping assembly on the blade. and the pressure sensor may be mounted on the pressure arm 111 or the support arm 113.

The control unit is configured to control the first valve unit 28 to be powered on to adjust the distance between the pressure arm 111 and the support arm 113 . The control unit controls the second valve unit 31 to be powered on and the first valve unit 28 to be powered off, in response to the clamping force reaching the first preset value, so that the upper vertical arm Adjust the inclination angle of the pressure arm 111 relative to (112). The control unit controls the third valve unit 35 to be powered on and the second valve unit 31 to be powered off, in response to the clamping force reaching the second preset value, so that the upper vertical arm Lock the pressing arm (111) against (112).

The hydraulic system according to an embodiment of the present application may expand and contract by simultaneously driving three hydraulic cylinders.

The hydraulic system according to the embodiment of the present application can prevent three hydraulic cylinders from following, which is safe and energy-saving.

The hydraulic system according to the embodiment of the present application may drive the clamping mechanism of the blade hoisting tooling to clamp the blade and control the clamping force to be within a specific range.

The hydraulic system according to the embodiment of the present application can prevent the oil pressure of the system from continuously decreasing due to leakage of hydraulic components.

The hydraulic system according to the embodiment of the present application can avoid impact caused by unstable movement of the clamping hydraulic cylinder.

The blade hoisting tooling according to embodiments of the present application is at least suitable for hoisting one single blade of an offshore wind turbine.

The previous description covers only some preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Changes and replacements readily conceived by a person skilled in the art within the technical scope disclosed in this application (eg, combinations of features in various embodiments of this application) fall within the protection scope of this application. Accordingly, the scope of protection of this application shall be limited by the appended claims.

Claims (16)

It is a hydraulic system for blade hoisting tooling,
A drive unit configured to drive hydraulic oil in a hydraulic system to form an oil supply path and an oil return path, and supply oil to a hydraulic cylinder through the oil supply path or discharge hydraulic oil from the hydraulic cylinder through the oil return path ( 4, 04) - The hydraulic cylinders include a first hydraulic cylinder 115 having a first small chamber and a first large chamber, a second hydraulic cylinder 117 having a second small chamber and a second large chamber, and a third a third hydraulic cylinder 1182 having a large chamber and a third small chamber;
a first pressure maintaining unit connected between the first hydraulic cylinder (115) and the driving units (4, 04) for oil supply and oil return of the first hydraulic cylinder (115);
a second pressure maintaining unit connected between the second hydraulic cylinder (117) and the driving unit (4, 04) for oil supply and oil return of the second hydraulic cylinder;
a third pressure maintaining unit connected between the third hydraulic cylinder (1182) and the driving unit (4, 04) for oil supply and oil return of the third hydraulic cylinder;
A first valve unit 28, a second valve unit 31, and a third valve unit 35 are included, and the first valve unit 28 includes an oil supply path of the first hydraulic cylinder 115 and Arranged in the oil return path, the second valve unit 31 is arranged in the oil supply path and the oil return path of the second hydraulic cylinder 117, the third valve unit 35 is arranged in the third hydraulic cylinder Arranged in the oil supply path and oil return path of 1182,
The first hydraulic cylinder (115), the second hydraulic cylinder (117) and the third hydraulic cylinder (1182) are configured to drive a blade clamp of the blade hoisting tooling to clamp the blade. hydraulic system. The method of claim 1, further comprising a control unit, the control unit comprising: the drive unit (4, 04), the first valve unit (28), the second valve unit (31) and the third valve unit ( 35), first controlling the first hydraulic cylinder 115 and the second hydraulic cylinder 117 to reach a preset position, and then controlling the third hydraulic cylinder 1182 to extend the blade Hydraulic system for blade hoisting tooling, locking the blade clamp of the hoisting tooling. The blade hoisting according to claim 1, wherein the hydraulic system further comprises an accumulator (24) connected to a node (E) between the first large chamber of the first hydraulic cylinder (115) and the first pressure maintaining unit. Hydraulic system for tooling. According to any one of claims 1 to 3,
the first pressure maintaining unit includes a first bi-directional hydraulic locking device arranged in an oil supply path and an oil return path of the first hydraulic cylinder (115);
the second pressure maintaining unit includes a second bi-directional hydraulic locking device arranged in an oil supply path and an oil return path of the second hydraulic cylinder (117);
The hydraulic system for blade hoisting tooling, wherein the third pressure maintaining unit includes a third bi-directional hydraulic locking device arranged in an oil supply path and an oil return path of the third hydraulic cylinder (1182). According to claim 4,
A first one-way throttle valve 27 connected between the first two-way hydraulic locking device and the first large chamber, and a second one-way throttle valve 41 connected between the first two-way hydraulic locking device and the first small chamber Further comprising, a hydraulic system for blade hoisting tooling. 5. The method of claim 4, wherein the first valve unit (28) includes a first 3-position 4-way reversing valve, and the second valve unit (31) includes a second 3-position 4-way reversing valve, the three-valve unit 35 includes a third three-position four-way reversing valve; the first three-position four-way reversing valve has a first P port, a first T port, a first A port and a first B port; the second three-position four-way reversing valve has a second P port, a second T port, a second A port and a second B port; the third three-position four-way reversing valve has a third P port, a third T port, a third A port and a third B port; the first P port, the second P port and the third P port communicate with the drive unit (4, 04); the first T port, the second T port and the third T port communicate with the hydraulic oil tank of the hydraulic system; The first A port, the second A port, and the third A port are respectively connected to the A1 port of the first two-way hydraulic locking device, the A1 port of the second two-way hydraulic locking device, and the A1 port of the third two-way hydraulic locking device, ; The first B port, the second B port, and the third B port are respectively connected to the B1 port of the first two-way hydraulic locking device, the B1 port of the second two-way hydraulic locking device, and the B1 port of the third two-way hydraulic locking device, ; A2 port of the first two-way hydraulic locking device, A2 port of the second two-way hydraulic locking device, and A2 port of the third two-way hydraulic locking device communicate with the first small chamber, the second small chamber, and the third small chamber, respectively; ; The B2 port of the first two-way hydraulic locking device, the B2 port of the second two-way hydraulic locking device, and the B2 port of the third two-way hydraulic locking device communicate with the first large chamber, the second large chamber, and the third large chamber, respectively. , hydraulic system for blade hoisting tooling. 7. The system according to claim 6, wherein the hydraulic system further includes a first check valve (07), the inlet of the first check valve (07) is connected to the drive unit (4, 04), the first check valve (07) The outlet of (07) is connected to the first common node (F) of the first valve unit (28), the second valve unit (31) and the third valve unit (35). The method of claim 1, wherein the first hydraulic cylinder (115), the second hydraulic cylinder (117) and the third hydraulic cylinder (1182) each include a dual oil path, and the dual oil path comprises the first hydraulic cylinder ( 115), the same hydraulic system for blade hoisting tooling as the main oil path of the second hydraulic cylinder 117 and the third hydraulic cylinder 1182. Blade hoisting tooling, comprising a hydraulic system for blade hoisting tooling according to any one of claims 1 to 8. A single blade hoisting tooling comprising a hydraulic system for blade hoisting tooling according to any one of claims 1 to 8, further comprising a blade clamp, the blade clamp comprising:
An upper clamping assembly comprising a pressure arm (111) and an upper vertical arm (112) extending downwardly from one end of the pressure arm (111), wherein the pressure arm (111) is pivotable relative to the upper vertical arm (112). -;
A lower clamping assembly comprising a support arm (113) and a lower vertical arm (114) extending upwardly from one end of the support arm (113), wherein the lower vertical arm (114) is connected to the upper vertical arm (112) and , the upper clamping assembly and the lower clamping assembly form a space for clamping the blade;
a first locking assembly (116) configured to lock the upper vertical arm (112) relative to the lower vertical arm (114); and
a second locking assembly (118) comprising a third hydraulic cylinder (1182) configured to lock the press arm (111) relative to the upper vertical arm (112);
The first hydraulic cylinder 115 is connected between the upper vertical arm 112 and the lower vertical arm 114 to drive the upper clamping assembly to move it relative to the lower clamping assembly, so that the pressure arm 111 and the adjusting the distance between the support arms 113;
The second hydraulic cylinder 117 drives the pressure arm 111 to rotate it relative to the upper vertical arm 112 to adjust the inclination angle of the pressure arm 111 relative to the upper vertical arm 112. Constructed, single blade hoisting tooling. 11. The method of claim 10, wherein a pivot shaft (1121) is provided at an upper portion of the upper vertical arm (112), and the pressing arm (111) is connected to the upper vertical arm (112) via the pivot shaft (1121). is;
The lower end of the second hydraulic cylinder 117 is hinged with the lower portion of the upper vertical arm 112, and the upper end of the second hydraulic cylinder 117 is hinged with the end portion of the pressure arm 111. Single blade hoisting tooling coupled to drive the pressure arm (111) to rotate about a pivot shaft (1121). 12. Single blade hoisting tooling according to claim 11, wherein the second locking assembly (118) further comprises a stop configured to limit retraction of the second hydraulic cylinder (117). 13. The method of claim 12, wherein the stop is a locking wedge (1181), the locking wedge (1181) has a locked position and an unlocked position, in the locked position, the locking wedge (1181) is a second hydraulic cylinder (117). abutting the upper end of the second hydraulic cylinder 117 to limit contraction of the upper end of the second hydraulic cylinder 117, and in the unlocked position, the locking wedge 1181 separates from the upper end of the second hydraulic cylinder 117 is;
The third hydraulic cylinder (1182) is mounted on the pressure arm (111) and is configured to drive the locking wedge (1181) to move it to at least one of a locked position and an unlocked position. 14. The method of claim 13, wherein the locking wedge (1181) is provided with an inclined surface (1181a), and in the locked position, the inclined surface (1181a) of the locking wedge (1181) is provided with an upper portion of the second hydraulic cylinder (117). Abutting the lower part of the upper end of the second hydraulic cylinder (117) in the retraction direction of the end, limiting the retraction of the upper end of the second hydraulic cylinder (117). 11. The method of claim 10, wherein the first locking assembly (116) comprises:
a first locking member 1161 mounted on one of the lower vertical arm 114 and the upper vertical arm 112;
A second locking member 1162 mounted on the other of the lower vertical arm 114 and the upper vertical arm 112, arranged to face the first locking member 1161, and having a locked position and an unlocked position - in the locked position, the second locking member (1162) engages with the first locking member (1161) to lock the position of the upper clamping assembly relative to the lower clamping assembly; in the unlocked position, the second locking member (1162) is separated from the first locking member (1161), so that the upper vertical arm (112) is movable relative to the lower vertical arm (114); and
A single blade hoi comprising a first driving member (1163) connected to the second locking member (1162) and configured to drive the second locking member (1162) to move it to at least one of the locked position and the unlocked position. Sting Tooling. 16. The method of any one of claims 10 to 15, wherein the single blade hoisting tooling further comprises a pressure sensor for sensing a clamping force of the upper clamping assembly and the lower clamping assembly against the blade; The control unit is:
control the first valve unit 28 to be powered on, so as to adjust the distance between the pressure arm 111 and the support arm 113;
In response to a case where the clamping force reaches a first preset value, the second valve unit 31 is controlled to be powered on and the first valve unit 28 is controlled to be powered off, so that the upper vertical arm to adjust the inclination angle of the pressure arm (111) relative to (112);
In response to a case where the clamping force reaches a second preset value, the third valve unit 35 is controlled to be powered on and the second valve unit 31 is controlled to be powered off, so that the upper vertical arm Single blade hoisting tooling, configured to lock the press arm (111) relative to (112).

Images