CN216638626U

CN216638626U - Wind driven generator impeller angle adjusting device

Info

Publication number: CN216638626U
Application number: CN202220044884.0U
Authority: CN
Inventors: 张玉申
Original assignee: Hebei Changjiang Zhongyuan Rigging Co ltd
Current assignee: Hebei Changjiang Zhongyuan Rigging Co ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-05-31
Anticipated expiration: 2032-01-10

Abstract

The utility model discloses a wind driven generator impeller angle adjusting device, which comprises: the mounting base is mounted on a variable pitch bearing of the hub through flange bolts; the hoisting mechanism comprises hoisting plates and a hoisting assembly, a rotating shaft is horizontally arranged in the middle of the main beam body, the bottoms of the two hoisting plates are respectively sleeved and clamped on shaft sections at two ends of the rotating shaft at two sides of the main beam body, two ends extending outwards at the tops of the hoisting plates are connected to a hoisting hook of a crane through the hoisting assembly, and the rotating shaft driving mechanism is arranged in the main beam body and can drive the main beam body to rotate around the rotating shaft by an angle. The wind driven generator impeller angle adjusting device is convenient for flexibly adjusting the angle between the main beam body and the vertical lifting direction, is convenient for butt joint with a hub and also convenient for dismounting the device after driving the impeller to rotate, and improves the working efficiency.

Description

Wind driven generator impeller angle adjusting device

Technical Field

The utility model relates to the technical field of hoisting and mounting of wind driven generators, in particular to a device for adjusting the angle of an impeller to realize horizontal mounting of a single blade.

Background

The device for adjusting the installation angle of the single blade of the fan (patent publication No. CN211338570U) comprises a beam body, a wind wheel connecting seat arranged at one end of the beam body to form a connection with a wind wheel variable pitch bearing, a counterweight mechanism arranged at the other end of the beam body and provided with a counterweight block, and a hoisting mechanism arranged on the beam body between the wind wheel connecting seat and the counterweight mechanism at two ends; the hoisting mechanism is provided with a hoisting frame and a guide frame which are oppositely arranged and are hinged to the beam body, one end of the pull rod is hinged to the hoisting frame, the other end of the pull rod is inserted into the guide frame in a telescopic mode, a locking assembly which is arranged on the guide frame and is used for locking or unlocking the insertion position of the pull rod is arranged, and a connecting portion which is connected with an external lifting appliance is arranged on the hoisting frame. The utility model discloses an adjustment fan list blade installation angle's device can only become the regulation of oar bearing axis to horizontal position with the third of wind wheel, does benefit to hoist installation third blade, and can effectively reduce the installation degree of difficulty and the hoist and mount cost of blade.

The hoisting mechanism adopted by the device for adjusting the installation angle of the single blade of the fan is complex in structure, the adjustment range of the guide frame and the pull rod in a telescopic mode is limited, and the locking is realized after the adjustment of the hoisting angle is completed by manually locking the locking screw, so that the operation is very inconvenient.

Therefore, it is necessary to develop an angle adjusting device for a wind turbine impeller, which addresses the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an impeller angle adjusting device of a wind driven generator, which is convenient for flexibly adjusting the angle between a main beam body and the vertical hoisting direction and improves the operation efficiency.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model relates to an angle adjusting device for an impeller of a wind driven generator, which comprises: the front end of the main beam body is connected with the mounting base, the back end of the main beam body is selectively provided with the balance weight to achieve self balance, and the mounting base is mounted on a variable pitch bearing of the impeller hub through a flange bolt; hoisting machine constructs including platform sling and hoist subassembly, girder body middle part level is provided with the pivot, two the platform sling bottom is in girder body both sides overlap the joint respectively and be in on the both ends shaft part of pivot, the outside both ends that extend in platform sling top are passed through the hoist subassembly is connected to the lifting hook of crane, pivot actuating mechanism sets up the girder body is inside and can drive the girder body winds angular rotation takes place for the pivot.

Furthermore, a square hole is formed in the bottom of the hanging scaffold, and the square hole is connected to the square shaft section of the rotating shaft in a sleeved and clamped mode.

Further, the hoist subassembly includes hoist cable, hanging beam and last hoist cable down, hanging beam parallel arrangement is in the pivot top, the hoist cable is connected down the platform sling top lifting hole with hanging beam bottom rings, go up the hoist cable lower extreme and connect hanging beam top rings and upper end are articulated on the lifting hook.

Further, pivot actuating mechanism includes sharp drive unit and otic placode, the straight line drive unit bottom is installed through the hinged-support on the girder body, sharp drive unit working end articulates the rocking arm outer end of otic placode, the otic placode middle part is fixed in the pivot.

Further, the linear driving unit specifically adopts a hydraulic cylinder, an electric push rod or a screw rod slider structure.

Furthermore, the main beam body comprises a front end beam, a middle beam and a tail end beam which are sequentially connected through bolts from front to back, the hoisting mechanism and the rotating shaft driving mechanism are arranged on the middle beam, a bent neck part is arranged at the root part of the front end beam, and an included angle between two ends of the bent neck part is an obtuse angle; the root of the bent neck part is connected with the mounting base through bolts, and the outer end of the tail end beam is connected with the balance weight through bolts.

Furthermore, the mounting base is of a plate frame welding structure with a lower height, the bottom surface of the mounting base is connected with the variable-pitch bearing through a group of first bolt connecting holes in a penetrating mode, guide bolts penetrate through the first bolt connecting holes in the four corner positions, the length of each guide bolt is larger than that of other bolts, and the tip of each guide bolt is sharpened.

Furthermore, lifting lugs convenient to hoist are arranged on the two side walls of the installation base, and the lifting lugs are arranged in the middle of the side walls of the installation base.

Furthermore, guardrails are arranged at the tops of the middle beam and the tail end beam and arranged on two sides of the main beam body in the width direction.

Compared with the prior art, the wind driven generator impeller angle adjusting device has the beneficial effects that:

according to the wind driven generator impeller angle adjusting device, the rotating shaft in the middle of the main beam body is hoisted through the hoisting mechanism consisting of the hanging scaffold and the hoisting tool assembly, the rotating shaft driving mechanism can adjust the rotating angle of the main beam body around the rotating shaft and lock the rotating shaft, and different main beam body occupying angles can be adjusted when the wind driven generator impeller angle adjusting device is butted and disassembled. The lifting holes at the two ends extending outwards from the top of the lifting platform are used as lifting points, and the lifting is carried out at four points, so that the lifting stability is improved. The wind driven generator impeller angle adjusting device is convenient for flexibly adjusting the angle between the main beam body and the vertical lifting direction, and improves the lifting efficiency.

In addition, a square hole is formed in the bottom of the hanging scaffold and is sleeved and clamped with the rotating shaft, so that large torque can be transmitted, and relative rotation between the hanging scaffold and the rotating shaft is avoided; through the setting of hanging beam, can reduce hoist cable length, reduce the hoist and mount height, accomplish steadily to lift by crane. Through the rocking arm outer end of sharp drive unit work end drive otic placode promotes the otic placode and drives the rotatory certain angle of pivot adapts to the butt joint angle and changes, and the rocking arm promotes rotatory mode moreover, can guarantee great drive moment, satisfies the angular adjustment demand of heavy equipment. Through preceding end beam, centre sill and end roof beam constitution the girder body changes the syllogic connection for original two segmentations is connected into the syllogic, is convenient for reduce single section roof beam body length, is applicable to the installation of big model fan blade, has reduced the transportation degree of difficulty. Through setting up the root at the front end roof beam with curved neck portion, can effectively reduce the installation base height, because different model installations need change different installation bases, the installation base of attenuate can effectively reduce cost. Through cross-under at four angular position of installation base bottom surface guide bolt, be convenient for lead when installation and dismantlement, reduce the butt joint degree of difficulty. Through the setting of lug, be convenient for steadily hoist and mount installation base and assemble or dismantle.

Drawings

The utility model is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic view of an initial installation state of an impeller angle adjusting device of a wind turbine according to the present invention;

FIG. 2 is a schematic view of a final installation state of the wind turbine blade angle adjustment apparatus according to the present invention;

FIG. 3 is a schematic view of a portion I in FIG. 1;

FIG. 4 is a perspective view of the mounting base of the present invention;

FIG. 5 is a schematic view of a three-dimensional structure of the hoisting mechanism of the present invention.

Description of the reference numerals: 1. installing a base; 101. a first bolt connection hole; 102. a second bolt connection hole; 103. a guide bolt; 104. lifting lugs; 2. a front end beam; 201. a neck bending part; 3. a center sill; 4. a tip beam; 5. balancing weight; 6. a hoisting mechanism; 601. a hanging scaffold; 6011. a square hole; 602. a lower sling; 603. a hanging beam; 604. hoisting a sling; 7. a rotating shaft driving mechanism; 701. an ear plate; 8. a guardrail; 9. a hook; 10. an impeller hub.

Detailed Description

The core of the utility model is to provide the wind driven generator impeller angle adjusting device, which is convenient for flexibly adjusting the angle between the main beam body and the vertical hoisting direction and improves the hoisting efficiency.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to the drawings, fig. 1 is a schematic view of an initial installation state of an impeller angle adjusting device of a wind driven generator according to the present invention; FIG. 2 is a schematic view of a final installation state of the wind turbine blade angle adjustment apparatus according to the present invention; FIG. 3 is a schematic view of a portion I in FIG. 1; FIG. 4 is a perspective view of the mounting base of the present invention; fig. 5 is a schematic view of a three-dimensional structure of the hoisting mechanism of the utility model.

In one embodiment, as shown in fig. 1 to 5, the wind turbine impeller angle adjusting apparatus of the present invention includes: the installation base 1, the main beam body, the balance weight 5, the hoisting mechanism 6 and the rotating shaft driving mechanism 7. The installation base 1 is connected to the girder body front end, the counter weight 5 is connected in order to reach self balance to the girder body rear end. The mounting base 1 is mounted on a third blade pitch bearing of the impeller hub 10 through flange bolts. The hoisting mechanism 6 comprises hoisting plates 601 and hoisting device assemblies, a rotatable rotating shaft is horizontally erected in the middle of the main beam body, the bottoms of the two hoisting plates 601 are respectively sleeved and clamped on shaft sections at two ends of the rotating shaft at two sides of the main beam body, and two ends of the top of each hoisting plate 601 extending outwards are connected to a hoisting hook 9 of a crane through the hoisting device assemblies. The rotating shaft driving mechanism 7 is installed inside the main beam body and can drive the main beam body to rotate around the rotating shaft in an angle mode.

The rotating shaft in the middle of the main beam body is hoisted through the hoisting mechanism 6 consisting of the hanging scaffold 601 and the hoisting tool assembly, and the rotating shaft driving mechanism 7 can adjust the rotating angle of the rotating shaft and lock the rotating shaft, so that different occupied angles of the main beam body can be adjusted when the wind driven generator impeller angle adjusting device is butted and disassembled. The lifting holes at the two ends extending outwards from the top of the hanging scaffold 601 are used as lifting points, so that four-point lifting is realized, and the lifting stability is improved. The wind driven generator impeller angle adjusting device is convenient for flexibly adjusting the angle between the main beam body and the vertical lifting direction, and improves the lifting efficiency.

In an embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 5, a square hole 6011 is formed at the bottom of the hanging scaffold 601, and the square hole 6011 is sleeved and fastened on the square shaft section of the rotating shaft.

Obviously, the square hole 6011 may also be replaced by other polygonal holes, such as a pentagon, a hexagon, an octagon, a single-side mill, a key slot, etc., so as to fix the rotating disc and the rotating shaft circumferentially relatively without circumferential rotation after the socket joint. And correspondingly, the sleeve clamping shaft section of the rotating shaft changes the section. Similar simple structural variations fall within the scope of the present invention.

Specifically, as shown in fig. 5, the spreader assembly includes a lower sling 602, a hanging beam 603 and an upper sling 604, the hanging beam 603 is disposed above the rotating shaft in parallel, the lower sling 602 is connected to a hanging hole at the top end of the hanging plate 601 and a hanging ring at the bottom of the hanging beam 603, the number of the lower slings 602 is four, and both ends of the lower slings are connected through a U-shaped shackle. The lower ends of the upper slings 604 are connected with a hanging ring at the top of the hanging beam 603, the upper ends of the upper slings are hung on the hanging hooks 9, the number of the upper slings 604 is two, and the bottom ends of the upper slings are connected through U-shaped shackles.

A square hole 6011 is formed in the bottom of the hanging scaffold 601, and the square hole 6011 is sleeved and clamped with the rotating shaft, so that large torque can be transmitted, and relative rotation between the two is avoided; through the setting of hanging beam 603, can reduce hoist cable length, reduce the hoist and mount height, accomplish steadily to lift by crane.

In an embodiment of the present invention, as shown in fig. 1 and 3, the rotating shaft driving mechanism 7 includes a linear driving unit and an ear plate 701, a bottom end of the linear driving unit is mounted on the main beam body through a hinged support, a working end of the linear driving unit is hinged to an outer end of a rocker arm of the ear plate 701, a middle portion of the ear plate 701 is connected to an outer end of the rotating shaft through a flange bolt, and obviously, the middle portion of the ear plate 701 may also be connected to the outer end of the rotating shaft through welding.

Specifically, as shown in fig. 1 and 3, the linear driving unit is specifically configured by a hydraulic cylinder, an electric push rod or a screw slider. The electric control or hydraulic control device of the linear driving unit is arranged in the cavity of the main beam body.

Through the rocking arm outer end of sharp drive unit working end drive otic placode 701 promotes otic placode 701 and drives the rotatory certain angle of pivot adapts to the butt joint angle and changes, and the rocking arm promotes rotatory mode moreover, can guarantee great drive moment, satisfies the angular adjustment demand of heavy equipment.

In one embodiment of the present invention, as shown in fig. 1 and 2, the main beam body includes a front end beam 2, a middle beam 3 and a terminal beam 4 which are sequentially bolted from front to back, preferably three sections, and may be 2 sections, 4 sections or more. Hoisting machine constructs 6 and pivot actuating mechanism 7 and sets up on middle roof beam 3, and the root of front end roof beam 2 is provided with curved neck portion 201, and the contained angle in curved neck portion 201 both ends is the obtuse angle, can select the contained angle according to the installation technology, and the purpose is under natural state, and the butt joint face of installation base 1 is parallel with the variable pitch bearing terminal surface. The root part of the elbow part 201 is connected with the mounting base 1 through bolts, and the outer end of the end beam 4 is connected with the balance weight 5 through bolts. The counterweight block in the counterweight 5 is of a single-block structure, and the gravity center position is adjusted by increasing and decreasing the number of the counterweight blocks and changing the position so as to meet the use requirements of different machine types.

Constitute through front end roof beam 2, intermediate beam 3 and terminal roof beam 4 the girder body changes the syllogic connection for original two segmentations are connected into the syllogic, is convenient for reduce single section roof beam body length, is applicable to the installation of big model fan blade, has reduced the transportation degree of difficulty. Through setting up the root at front end roof beam 2 with neck portion 201, can effectively reduce the mounting base 1 height, because different model installations need change different mounting bases 1, the effective reduce cost of installation base 1 of attenuate.

In a specific embodiment of the present invention, as shown in fig. 1, 2 and 4, the mounting base 1 is a plate-and-frame welded structure with a low height, the bottom surface of the mounting base 1 is connected to the pitch bearing through a set of first bolt connecting holes 101, guide bolts 103 are connected through the first bolt connecting holes 101 at four corners, the length of each guide bolt 103 is greater than that of other bolts, and the tip of each guide bolt 103 is sharpened. The top surface of the mounting base 1 is connected with the front end beam 2 through a group of second bolt mounting holes 102.

Specifically, as shown in fig. 4, lifting lugs 104 convenient for lifting are disposed on both side walls of the mounting base 1, and the lifting lugs 104 are disposed in the middle of the side walls of the mounting base 1.

Through cross-under at four angular position on installation base 1 bottom surface guide bolt 103, be convenient for lead to when installation and dismantlement, be convenient for leading-in to become the oar bearing hole, reduce the butt joint degree of difficulty. Through the setting of lug 104, be convenient for steadily hoist and mount installation base 1 and assemble or dismantle.

In an embodiment of the present invention, as shown in fig. 1 and 2, guard rails 8 are further provided on the top of the intermediate beam 3 and the end beam 4, and the guard rails 8 are provided on both sides in the width direction of the main beam body. The guardrail 8 is also provided with a ladder stand at the side wall of the middle beam 3.

The top of the middle beam 3 and the top of the end beam 4 are provided with the guardrails 8, so that the safety of walking at the top of an operator can be ensured in the assembling and debugging process.

The working principle of the wind driven generator impeller angle adjusting device of the utility model is as follows: firstly, the rotating shaft driving mechanism 7 locks the rotating shaft and the hanging scaffold 601 to horizontally lift the wind driven generator impeller angle adjusting device, so that the inclination angles of the pitch bearing for mounting the third blade on the mounting base 1 and the impeller hub 10 are consistent, and the mounting base 1 and the pitch bearing are smoothly connected by virtue of the guide bolt 103 of the mounting base 1. After all the bolts are reliably connected, the crane hook 9 is descended, the wind driven generator impeller angle adjusting device drives the hub to rotate, meanwhile, the adaptive rotating shaft driving mechanism 7 drives the rotating shaft to rotate, and therefore the two ends of the hanging scaffold 601 are lifted in a parallel and level mode until the proper angle, namely the axis of the variable pitch bearing, reaches the horizontal position, and the lifting is stopped. And locking the hub brake lock, loosening the bolt at the joint of the first bolt connecting hole 101, and moving out of the wind driven generator impeller angle adjusting device. And finally, the rotating shaft is driven to rotate by the rotating shaft driving mechanism 7 so as to adjust the inclination angle of the wind driven generator impeller angle adjusting device to the horizontal position, and the wind driven generator impeller angle adjusting device is released by means of a wind cable and the like.

According to the wind driven generator impeller angle adjusting device, the rotating shaft in the middle of the main beam body is hoisted through the hoisting mechanism 6 consisting of the hanging scaffold 601 and the hoisting tool assembly, and the rotating shaft driving mechanism 7 can adjust the rotating angle of the rotating shaft and lock the rotating shaft, so that different occupied angles of the main beam body can be adjusted when the wind driven generator impeller angle adjusting device is butted and disassembled. The lifting holes at the two ends extending outwards from the top of the hanging scaffold 601 are used as lifting points, so that four-point lifting is realized, and the lifting stability is improved. The wind driven generator impeller angle adjusting device is convenient for flexibly adjusting the angle between the main beam body and the vertical lifting direction, and improves the lifting efficiency. In addition, a square hole 6011 is formed in the bottom of the hanging scaffold 601, and the square hole 6011 is sleeved and clamped with the rotating shaft, so that large torque can be transmitted, and relative rotation between the two is avoided; through the setting of hanging beam 603, can reduce hoist cable length, reduce the hoist and mount height, accomplish steadily to lift by crane. Through the rocking arm outer end of sharp drive unit working end drive otic placode 701 promotes otic placode 701 and drives the rotatory certain angle of pivot adapts to the butt joint angle and changes, and the rocking arm promotes rotatory mode moreover, can guarantee great drive moment, satisfies the angular adjustment demand of heavy equipment. Constitute through front-end roof beam 2, intermediate beam 3 and terminal roof beam 4 the girder body changes the syllogic connection into for original two segmentations, is convenient for reduce single section roof beam body length, is applicable to the installation of big model fan blade, has reduced the transportation degree of difficulty. Through setting up the root with turn neck portion 201 at front end roof beam 2, can effectively reduce the installation base 1 height, because different model installation need be changed different installation bases 1, the installation base 1 of attenuate can effectively reduce cost. Through cross-under at four angular position of installation base 1 bottom surface guide bolt 103, be convenient for lead when installation and dismantlement, reduce the butt joint degree of difficulty. Through the setting of lug 104, be convenient for steadily hoist and mount installation base 1 and assemble or dismantle.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.

Claims

1. An impeller angle adjusting device of a wind driven generator is characterized by comprising: the mounting structure comprises a mounting base (1), a main beam body, a balance weight (5), a hoisting mechanism (6) and a rotating shaft driving mechanism (7), wherein the front end of the main beam body is connected with the mounting base (1), the balance weight (5) is installed at the rear end in a matching mode to achieve self balance, and the mounting base (1) is installed on a variable pitch bearing of an impeller hub (10) through flange bolts; hoisting machine constructs (6) including platform sling (601) and hoist subassembly, girder body middle part level is provided with the pivot, two platform sling (601) bottom is in girder body both sides overlap the card respectively and connect in the both ends shaft part of pivot, the both ends that extend outside at platform sling (601) top are passed through the hoist subassembly is connected to lifting hook (9) of crane, pivot actuating mechanism (7) set up the girder body is inside and can drive the girder body winds angular rotation takes place for the pivot.

2. The wind turbine impeller angle adjustment device of claim 1, wherein: the bottom of the hanging scaffold (601) is provided with a square hole (6011), and the square hole (6011) is sleeved and clamped on the square shaft section of the rotating shaft.

3. The wind turbine impeller angle adjustment device according to claim 2, wherein: the hoist subassembly includes hoist cable (602), hanging beam (603) and goes up hoist cable (604) down, hanging beam (603) parallel arrangement is in the pivot top, hoist cable (602) is connected down the platform sling (601) top lifting eye with hanging beam (603) bottom rings, go up hoist cable (604) lower extreme and connect hanging beam (603) top rings and upper end articulate on lifting hook (9).

4. The wind turbine impeller angle adjusting device according to any one of claims 1 to 3, wherein: the rotating shaft driving mechanism (7) comprises a linear driving unit and an ear plate (701), the bottom end of the linear driving unit is installed on the main beam body through a hinged support, the working end of the linear driving unit is hinged to the outer end of a rocker arm of the ear plate (701), and the middle of the ear plate (701) is fixed to the rotating shaft.

5. The wind turbine impeller angle adjustment device of claim 4, wherein: the linear driving unit is of a hydraulic cylinder, an electric push rod or a lead screw sliding block structure.

6. The wind turbine impeller angle adjustment device of claim 1, wherein: the main beam body comprises a front end beam (2), a middle beam (3) and a tail end beam (4) which are sequentially connected through bolts from front to back, the hoisting mechanism (6) and the rotating shaft driving mechanism (7) are arranged on the middle beam (3), a bent neck portion (201) is arranged at the root of the front end beam (2), and an included angle formed by two ends of the bent neck portion (201) is an obtuse angle; the root of curved neck portion (201) bolted connection installation base (1), end roof beam (4) outer end bolted connection counter weight (5).

7. The wind turbine impeller angle adjustment device of claim 6, wherein: the mounting base (1) is of a plate frame welding structure with a lower height, the bottom surface of the mounting base (1) is connected with the variable-pitch bearing through a group of first bolt connecting holes (101) in a penetrating mode, guide bolts (103) penetrate through the first bolt connecting holes (101) in four corners, the length of each guide bolt (103) is larger than that of other bolts, and the tip of each guide bolt is sharpened.

8. The wind turbine impeller angle adjustment device of claim 7, wherein: lifting lugs (104) convenient to hoist are arranged on the two side walls of the mounting base (1), and the lifting lugs (104) are arranged in the middle of the side walls of the mounting base (1).

9. The wind turbine impeller angle adjustment device of claim 6, wherein: the top of centre sill (3) and terminal beam (4) still is provided with guardrail (8), guardrail (8) are in both sides set up in the main beam body width direction.