CN113323794A - Automatic wind alignment device of horizontal axis wind turbine suitable for medium-low wind speed area - Google Patents
Automatic wind alignment device of horizontal axis wind turbine suitable for medium-low wind speed area Download PDFInfo
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- CN113323794A CN113323794A CN202110798556.XA CN202110798556A CN113323794A CN 113323794 A CN113323794 A CN 113323794A CN 202110798556 A CN202110798556 A CN 202110798556A CN 113323794 A CN113323794 A CN 113323794A
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- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000009347 mechanical transmission Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A horizontal axis wind turbine automatic wind alignment device suitable for middle and low wind speed areas comprises a wind vane, a cylindrical cam mechanism, a hydraulic jack, a hydraulic injection pump, a servo actuating cylinder, a swash plate type axial plunger pump, a plunger pump driving motor, a hydraulic motor and a planetary gear train mechanism; when the direction of the wind vane is coincident with the axis of the cabin of the horizontal axis wind turbine, the swash plate of the swash plate type axial plunger pump is in a non-inclined state, the pressure difference between the two oil ports of the swash plate type axial plunger pump is zero, and the hydraulic motor is in a non-starting state; when the direction of the wind vane is not coincident with the axis of the cabin of the horizontal axis wind turbine, the swash plate of the swash plate type axial plunger pump is in an inclined state, the pressure difference between the two oil ports of the swash plate type axial plunger pump is larger than zero, the hydraulic motor is in a starting state, and the cabin of the wind turbine rotates in a yawing mode. The invention triggers the wind machine to yaw and rotate in a mechanical transmission mode, thereby effectively improving the reliability and stability of automatic wind alignment.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to an automatic wind alignment device of a horizontal axis wind turbine, which is suitable for a medium-low wind speed area.
Background
In a medium-low wind speed area, in order to enable a horizontal axis wind turbine to be started smoothly and ensure that an impeller can rotate efficiently after the horizontal axis wind turbine is started, the horizontal axis wind turbine generally needs to have an automatic wind aligning function, two schemes are mainly adopted for automatically aligning wind for the horizontal axis wind turbine at present, the first automatic wind aligning scheme is mainly suitable for a small horizontal axis wind turbine, and the second automatic wind aligning scheme is mainly applied to a medium-large horizontal axis wind turbine.
For the first automatic wind alignment scheme, the wind turbine mainly adopts an upward-raised tail vane to achieve the purpose of automatic wind alignment of the wind turbine, a main machine part of the wind turbine can horizontally and freely rotate at the top end of a supporting rod, an impeller of the wind turbine is arranged in front of the main machine part of the wind turbine, the tail vane is connected to the rear end of the main machine part of the wind turbine through a rudder rod, when the incoming flow direction is not coincident with the axis of the main machine part of the wind turbine, the tail vane can generate a yaw effect through the action with the incoming flow and drive the main machine part of the wind turbine to automatically deflect until the axis of the main machine part of the wind turbine is coincident with the incoming flow direction, and automatic wind alignment is finally achieved. However, the automatic wind alignment scheme can only be applied to small horizontal axis wind turbines, but cannot be applied to medium and large horizontal axis wind turbines, so that the use limitation is large.
For the second automatic wind alignment scheme, a yaw system is arranged between a cabin and a tower to realize automatic wind alignment of the wind turbine, the yaw system utilizes an encoder to detect the rotation angle of the cabin relative to the axis of the tower in real time, a anemoscope is utilized to detect the direction of incoming wind in real time, when the yaw system detects that the axis of the cabin is not coincident with the direction of the incoming wind, an electric attitude adjusting mechanism in the yaw system is started to control the cabin to horizontally rotate at the top end of the tower, meanwhile, the yaw system detects the included angle between the axis of the cabin and the direction of the incoming wind in real time, when the yaw system detects that the included angle between the axis of the cabin and the direction of the incoming wind is zero, the electric attitude adjusting mechanism stops running, at the moment, the axis of the cabin is coincident with the direction of the incoming wind, and finally, automatic wind alignment is realized. However, the automatic wind-facing scheme excessively depends on various sensors to detect the yaw state of the cabin, and any yaw parameter monitoring link has a problem, so that the reliability and stability of automatic wind facing are affected, for medium and large horizontal axis wind turbines, the process of climbing a tower to maintain the wind turbine is quite difficult, and the medium and large horizontal axis wind turbines are almost erected in an unmanned environment in the field, so that the maintenance difficulty is further increased. Therefore, the reliability and the stability of the automatic wind alignment of the medium and large horizontal axis wind turbine are imperative to be improved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the automatic wind aligning device of the horizontal axis wind turbine, which is suitable for the middle-low wind speed area, the wind turbine is triggered to perform yaw rotation in a mechanical transmission mode, a sensor triggering mode adopted in the traditional automatic wind aligning scheme is abandoned, a plurality of yaw parameter monitoring links are omitted, the reliability and the stability of automatic wind alignment are greatly improved, and the maintenance frequency of the wind turbine is further reduced.
In order to achieve the purpose, the invention adopts the following technical scheme: a horizontal axis wind turbine automatic wind alignment device suitable for middle and low wind speed areas comprises a wind vane, a cylindrical cam mechanism, a hydraulic jack, a hydraulic injection pump, a servo actuating cylinder, a swash plate type axial plunger pump, a plunger pump driving motor, a hydraulic motor and a planetary gear train mechanism; the wind vane is positioned outside the upper part of the cabin of the wind turbine; the cylindrical cam mechanism, the hydraulic jack, the hydraulic injection pump, the servo actuating cylinder, the inclined disc type axial plunger pump, the plunger pump driving motor and the hydraulic motor are all positioned inside the cabin of the wind turbine; the planetary gear train mechanism is positioned at the top of the wind turbine tower, and the wind turbine engine room and the wind turbine tower are rotationally connected together through a yaw bearing; the supporting rod of the wind vane is vertically inserted into the cabin of the wind turbine, and an antifriction bearing is arranged between the supporting rod of the wind vane and the supporting rod perforation of the cabin of the wind turbine; the cylindrical cam mechanism is positioned under the supporting rod of the wind vane, a central cam rod of the cylindrical cam mechanism is arranged upwards and is coaxially and fixedly connected with the bottom end of the supporting rod of the wind vane, and a linear reciprocating motion shell of the cylindrical cam mechanism is in sliding connection and matching with a cabin of a wind turbine through a guide support; the hydraulic jack is positioned at the side part of the cylindrical cam mechanism, the hydraulic jack is vertically and fixedly arranged on the cabin of the wind turbine, and the bottom end of the linear reciprocating motion shell of the cylindrical cam mechanism is hinged with the tail end of a lever handle of the hydraulic jack; the hydraulic injection pump is positioned right above the hydraulic jack, a pump shell of the hydraulic injection pump is fixedly connected to a cabin of the wind turbine through a hanger, and a piston rod of the hydraulic injection pump is arranged towards the direction and is coaxially and fixedly connected with an ejector rod of the hydraulic jack; the servo actuator cylinder is positioned on the side part of the hydraulic jack, the servo actuator cylinder is horizontally arranged and fixedly connected to a wind turbine engine room, a rodless cavity of the servo actuator cylinder is communicated with a rodless cavity of the hydraulic injection pump, and a piston rod reset spring is arranged in a rod cavity of the servo actuator cylinder; the swash plate type axial plunger pump is positioned on the side part of the servo actuating cylinder, the swash plate type axial plunger pump is horizontally arranged and is fixedly connected to a cabin of the wind turbine through a support, and a piston rod of the servo actuating cylinder is hinged with a swash plate of the swash plate type axial plunger pump through a connecting rod; the plunger pump driving motor is positioned on the side part of the swash plate type axial plunger pump, the plunger pump driving motor is horizontally arranged and fixedly connected to a cabin of the wind turbine through a support, and a motor shaft of the plunger pump driving motor is coaxially and fixedly connected with a transmission shaft of the swash plate type axial plunger pump; the hydraulic motor is positioned on the side part of the swash plate type axial plunger pump and right above the wind turbine tower, the hydraulic motor is vertically arranged, the power output shaft faces downwards, and two oil ports of the hydraulic motor are communicated with two oil ports of the swash plate type axial plunger pump; the central gear of the planetary gear train mechanism is coaxially and fixedly connected to a power output shaft of the hydraulic motor, an outer gear ring of the planetary gear train mechanism is fixedly connected with a wind turbine tower, a wheel shaft of a planetary gear of the planetary gear train mechanism is vertically and fixedly connected to a wind turbine engine room, and the planetary gear has a rotary degree of freedom on the wheel shaft.
When the direction of the wind vane is coincident with the axis of the cabin of the horizontal axis wind turbine, the swash plate of the swash plate type axial plunger pump is in a non-inclined state, the pressure difference between the two oil ports of the swash plate type axial plunger pump is zero, and the hydraulic motor is in a non-starting state.
When the direction of the wind vane is not coincident with the axis of the cabin of the horizontal axis wind turbine, the swash plate of the swash plate type axial plunger pump is in an inclined state, the pressure difference between the two oil ports of the swash plate type axial plunger pump is larger than zero, the hydraulic motor is in a starting state, and the cabin of the wind turbine rotates in a yawing mode.
The invention has the beneficial effects that:
the automatic wind aligning device of the horizontal axis wind turbine suitable for the middle-low wind speed area triggers the wind turbine to perform yaw rotation in a mechanical transmission mode, abandons a sensor triggering mode adopted in the traditional automatic wind aligning scheme, omits a plurality of monitoring links of yaw parameters, greatly improves the reliability and stability of automatic wind alignment, and further reduces the maintenance frequency of the wind turbine.
Drawings
FIG. 1 is a schematic structural diagram of an automatic wind alignment device of a horizontal axis wind turbine suitable for a medium-low wind speed area according to the present invention;
in the figure, 1-wind vane, 2-cylindrical cam mechanism, 3-hydraulic jack, 4-hydraulic injection pump, 5-servo actuating cylinder, 6-swash plate type axial plunger pump, 7-plunger pump driving motor, 8-hydraulic motor, 9-planetary gear train mechanism, 10-wind turbine engine room, 11-wind turbine tower, 12-yaw bearing and 13-antifriction bearing.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, the automatic wind alignment device of the horizontal axis wind turbine suitable for the middle and low wind speed area comprises a wind vane 1, a cylindrical cam mechanism 2, a hydraulic jack 3, a hydraulic injection pump 4, a servo actuating cylinder 5, a swash plate type axial plunger pump 6, a plunger pump driving motor 7, a hydraulic motor 8 and a planetary gear train mechanism 9; the wind vane 1 is positioned outside above the wind turbine engine room 10; the cylindrical cam mechanism 2, the hydraulic jack 3, the hydraulic injection pump 4, the servo actuating cylinder 5, the swash plate type axial plunger pump 6, the plunger pump driving motor 7 and the hydraulic motor 8 are all positioned inside the wind turbine engine room 10; the planetary gear train mechanism 9 is positioned at the top of a wind turbine tower 11, and the wind turbine engine room 10 and the wind turbine tower 11 are rotationally connected together through a yaw bearing 12; the supporting rod of the wind vane 1 is vertically inserted into the wind turbine engine room 10, and an antifriction bearing 13 is arranged between the supporting rod of the wind vane 1 and the supporting rod perforation of the wind turbine engine room 10; the cylindrical cam mechanism 2 is positioned under the supporting rod of the wind vane 1, a central cam rod of the cylindrical cam mechanism 2 is arranged upwards and is coaxially and fixedly connected with the bottom end of the supporting rod of the wind vane 1, and a linear reciprocating motion shell of the cylindrical cam mechanism 2 is in sliding connection and matching with the wind turbine engine room 10 through a guide support; the hydraulic jack 3 is positioned at the side part of the cylindrical cam mechanism 2, the hydraulic jack 3 is vertically and fixedly arranged on the wind turbine engine room 10, and the bottom end of the linear reciprocating motion shell of the cylindrical cam mechanism 2 is hinged with the tail end of a lever handle of the hydraulic jack 3; the hydraulic injection pump 4 is positioned right above the hydraulic jack 3, a pump shell of the hydraulic injection pump 4 is fixedly connected to the wind turbine engine room 10 through a hanging bracket, and a piston rod of the hydraulic injection pump 4 is arranged towards the direction and coaxially and fixedly connected with an ejector rod of the hydraulic jack 3; the servo actuating cylinder 5 is positioned on the side part of the hydraulic jack 3, the servo actuating cylinder 5 is horizontally arranged and fixedly connected to a wind turbine engine room 10, a rodless cavity of the servo actuating cylinder 5 is communicated with a rodless cavity of the hydraulic injection pump 4, and a piston rod reset spring is arranged in a rod cavity of the servo actuating cylinder 5; the swash plate type axial plunger pump 6 is positioned on the side part of the servo actuating cylinder 5, the swash plate type axial plunger pump 6 is horizontally arranged and fixedly connected to a wind turbine engine room 10 through a support, and a piston rod of the servo actuating cylinder 5 is hinged with a swash plate of the swash plate type axial plunger pump 6 through a connecting rod; the plunger pump driving motor 7 is positioned on the side part of the swash plate type axial plunger pump 6, the plunger pump driving motor 7 is horizontally arranged and is fixedly connected to the wind turbine engine room 10 through a support, and a motor shaft of the plunger pump driving motor 7 is coaxially and fixedly connected with a transmission shaft of the swash plate type axial plunger pump 6; the hydraulic motor 8 is positioned on the side part of the swash plate type axial plunger pump 6 and right above the wind turbine tower 11, the hydraulic motor 8 is vertically arranged, the power output shaft faces downwards, and two oil ports of the hydraulic motor 8 are communicated with two oil ports of the swash plate type axial plunger pump 6; the central gear of the planetary gear train mechanism 9 is coaxially and fixedly connected to the power output shaft of the hydraulic motor 8, the outer gear ring of the planetary gear train mechanism 9 is fixedly connected with the wind turbine tower 11, the wheel axle of the planetary gear train mechanism 9 is vertically and fixedly connected to the wind turbine engine room 10, and the planetary gear has a rotation degree of freedom on the wheel axle.
When the direction of the wind vane 1 coincides with the axis of the cabin of the horizontal axis wind turbine, the swash plate of the swash plate type axial plunger pump 6 is in a non-inclined state, the pressure difference between the two oil ports of the swash plate type axial plunger pump 6 is zero, and the hydraulic motor 8 is in a non-starting state.
When the direction of the wind vane 1 is not coincident with the axis of the cabin of the horizontal axis wind turbine, the swash plate of the swash plate type axial plunger pump 6 is in an inclined state, the pressure difference between the two oil ports of the swash plate type axial plunger pump 6 is larger than zero, the hydraulic motor 8 is in a starting state, and the cabin 10 of the wind turbine rotates in a yawing mode.
The one-time use process of the present invention is described below with reference to the accompanying drawings:
in the normal operation process of the horizontal axis wind turbine, if the wind direction changes, namely, when the axis of the engine room does not coincide with the incoming flow wind direction, the wind vane 1 has the characteristics of being small and flexible, the wind direction can be tracked along with the incoming flow at the first time, and the wind vane can rotate rapidly according to the changed incoming flow wind direction until the pointing direction of the wind vane 1 coincides with the incoming flow wind direction, and at the moment, the pointing direction of the wind vane 1 can form an included angle with the axis of the engine room of the horizontal axis wind turbine.
Along with the rotation of wind vane 1, the bracing piece of wind vane 1 can drive the synchronous rotation of the central cam pole of cylindrical cam mechanism 2, and the central cam pole rotary motion of cylindrical cam mechanism 2 also can convert the vertical underdraft motion of straight reciprocating motion shell into in step, and the straight reciprocating motion shell through cylindrical cam mechanism 2 is vertical underdraft motion, can drive hydraulic jack 3's lever handle again and do the pendulum motion, and then drive hydraulic jack 3's ejector pin upwards output jacking force and displacement.
Along with the upward output of the jacking force and displacement of the jacking rod of the hydraulic jack 3, the axial compression effect is generated on the piston rod of the hydraulic injection pump 4, so that the hydraulic oil in the rodless cavity of the hydraulic injection pump 4 is extruded into the rodless cavity of the servo actuating cylinder 5, and the piston rod of the servo actuating cylinder 5 is pushed to extend out.
Along with the extension of the piston rod of the servo actuating cylinder 5, the connecting rod drives the swash plate of the swash plate type axial plunger pump 6 to incline, under the action of the plunger pump driving motor 7, the inclined swash plate can promote the pressure difference between the two oil ports of the swash plate type axial plunger pump 6, the pressure difference can be directly acted between the two oil ports of the hydraulic motor 8, and under the action of the pressure difference, the power output shaft of the hydraulic motor 8 can be driven to rotate.
The rotation of the power output shaft of the hydraulic motor 8 drives the sun gear of the planetary gear train mechanism 9 to synchronously rotate, under the meshing transmission action of the gears, the planetary gear of the planetary gear train mechanism 9 is driven to do circular motion around the sun gear, and under the driving of the planetary gear doing circular motion, the wind turbine engine room 10 is synchronously driven to do rotary motion around the central axis of the sun gear, so that the yaw rotation of the wind turbine engine room 10 is realized.
Along with the yawing rotation of the wind turbine engine room 10, the included angle between the pointing direction of the wind vane 1 and the axis of the engine room of the horizontal axis wind turbine will gradually decrease until the included angle is reduced to zero.
In the process of reducing the included angle, the wind vane 1 is in reverse rotation, and when the included angle is reduced to zero, the central cam rod and the linear reciprocating motion shell of the cylindrical cam mechanism 2 restore to the initial position, the lever handle of the hydraulic jack 3 also swings back to the initial position, and the ejector rod of the hydraulic jack 3 stops outputting upward jacking force and displacement and completes pressure relief at the same time.
When the pressure relief of the hydraulic jack 3 is finished, the rodless cavity of the hydraulic injection pump 4 and the rodless cavity of the servo actuator cylinder 5 communicated with the rodless cavity become a low-pressure state, and at the moment, under the action of a piston rod return spring in the rod cavity of the servo actuator cylinder 5, hydraulic oil in the rodless cavity of the servo actuator cylinder 5 is reversely extruded back to the rodless cavity of the hydraulic injection pump 4, so that the piston rod of the hydraulic injection pump 4 extends downwards to an initial position.
In the process of resetting the piston rod of the servo actuating cylinder 5, the connecting rod drives the swash plate of the swash plate type axial plunger pump 6 to recover to the initial state with zero inclination angle from the inclined state, at the moment, the pressure difference between the two oil ports of the swash plate type axial plunger pump 6 is also zero again, and the pressure difference between the two oil ports of the hydraulic motor 8 is also synchronously zero, so that the hydraulic motor 8 stops running, and the direction of the wind vane 1 and the axis of the cabin of the horizontal axis wind turbine reach the coincidence state again at the moment.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.
Claims (3)
1. The utility model provides an automatic wind device that faces of horizontal axis wind turbine suitable for well low wind speed area which characterized in that: the device comprises a wind vane, a cylindrical cam mechanism, a hydraulic jack, a hydraulic injection pump, a servo actuating cylinder, a swash plate type axial plunger pump, a plunger pump driving motor, a hydraulic motor and a planetary gear train mechanism; the wind vane is positioned outside the upper part of the cabin of the wind turbine; the cylindrical cam mechanism, the hydraulic jack, the hydraulic injection pump, the servo actuating cylinder, the inclined disc type axial plunger pump, the plunger pump driving motor and the hydraulic motor are all positioned inside the cabin of the wind turbine; the planetary gear train mechanism is positioned at the top of the wind turbine tower, and the wind turbine engine room and the wind turbine tower are rotationally connected together through a yaw bearing; the supporting rod of the wind vane is vertically inserted into the cabin of the wind turbine, and an antifriction bearing is arranged between the supporting rod of the wind vane and the supporting rod perforation of the cabin of the wind turbine; the cylindrical cam mechanism is positioned under the supporting rod of the wind vane, a central cam rod of the cylindrical cam mechanism is arranged upwards and is coaxially and fixedly connected with the bottom end of the supporting rod of the wind vane, and a linear reciprocating motion shell of the cylindrical cam mechanism is in sliding connection and matching with a cabin of a wind turbine through a guide support; the hydraulic jack is positioned at the side part of the cylindrical cam mechanism, the hydraulic jack is vertically and fixedly arranged on the cabin of the wind turbine, and the bottom end of the linear reciprocating motion shell of the cylindrical cam mechanism is hinged with the tail end of a lever handle of the hydraulic jack; the hydraulic injection pump is positioned right above the hydraulic jack, a pump shell of the hydraulic injection pump is fixedly connected to a cabin of the wind turbine through a hanger, and a piston rod of the hydraulic injection pump is arranged towards the direction and is coaxially and fixedly connected with an ejector rod of the hydraulic jack; the servo actuator cylinder is positioned on the side part of the hydraulic jack, the servo actuator cylinder is horizontally arranged and fixedly connected to a wind turbine engine room, a rodless cavity of the servo actuator cylinder is communicated with a rodless cavity of the hydraulic injection pump, and a piston rod reset spring is arranged in a rod cavity of the servo actuator cylinder; the swash plate type axial plunger pump is positioned on the side part of the servo actuating cylinder, the swash plate type axial plunger pump is horizontally arranged and is fixedly connected to a cabin of the wind turbine through a support, and a piston rod of the servo actuating cylinder is hinged with a swash plate of the swash plate type axial plunger pump through a connecting rod; the plunger pump driving motor is positioned on the side part of the swash plate type axial plunger pump, the plunger pump driving motor is horizontally arranged and fixedly connected to a cabin of the wind turbine through a support, and a motor shaft of the plunger pump driving motor is coaxially and fixedly connected with a transmission shaft of the swash plate type axial plunger pump; the hydraulic motor is positioned on the side part of the swash plate type axial plunger pump and right above the wind turbine tower, the hydraulic motor is vertically arranged, the power output shaft faces downwards, and two oil ports of the hydraulic motor are communicated with two oil ports of the swash plate type axial plunger pump; the central gear of the planetary gear train mechanism is coaxially and fixedly connected to a power output shaft of the hydraulic motor, an outer gear ring of the planetary gear train mechanism is fixedly connected with a wind turbine tower, a wheel shaft of a planetary gear of the planetary gear train mechanism is vertically and fixedly connected to a wind turbine engine room, and the planetary gear has a rotary degree of freedom on the wheel shaft.
2. The automatic wind alignment device of the horizontal axis wind turbine suitable for the middle and low wind speed areas as claimed in claim 1, wherein: when the direction of the wind vane is coincident with the axis of the cabin of the horizontal axis wind turbine, the swash plate of the swash plate type axial plunger pump is in a non-inclined state, the pressure difference between the two oil ports of the swash plate type axial plunger pump is zero, and the hydraulic motor is in a non-starting state.
3. The automatic wind alignment device of the horizontal axis wind turbine suitable for the middle and low wind speed areas as claimed in claim 1, wherein: when the direction of the wind vane is not coincident with the axis of the cabin of the horizontal axis wind turbine, the swash plate of the swash plate type axial plunger pump is in an inclined state, the pressure difference between the two oil ports of the swash plate type axial plunger pump is larger than zero, the hydraulic motor is in a starting state, and the cabin of the wind turbine rotates in a yawing mode.
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| CN202110798556.XA CN113323794B (en) | 2021-07-15 | 2021-07-15 | Automatic wind aligning device of horizontal axis wind turbine suitable for middle-low wind speed area |
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