CN202770391U

CN202770391U - Detection apparatus for variable pitch direction and angle of wind generating set

Info

Publication number: CN202770391U
Application number: CN 201220417606
Authority: CN
Inventors: 潘爱华; 王安正; 于长生; 舒晶; 刘林
Original assignee: NANJING WIND POWER TECHNOLOGY Co Ltd
Current assignee: NANJING WIND POWER TECHNOLOGY Co Ltd
Priority date: 2012-08-22
Filing date: 2012-08-22
Publication date: 2013-03-06
Anticipated expiration: 2022-08-22

Abstract

The utility model provides a detection apparatus for variable pitch directions and angles of a wind generating set. The detection apparatus comprises a variable pitch bearing, a proximity switch mounting support and Hall proximity switches. The proximity switch mounting support is fixed on a wheel hub and is close to inner ring gears of the variable pitch bearing. The two Hall proximity switches are fixed on the proximity switch mounting support. The detection apparatus for the variable pitch directions and the angles of the wind generating set is simple in structure and low in cost.

Description

The pick-up unit of wind generating set pitch control direction and angle

Technical field

The utility model relates to technical field of wind power generation, the pick-up unit of especially a kind of wind generating set pitch control direction and angle.

Background technology

At present, in the pitch-controlled system of Large-scale Wind Turbines, the general REDUNDANCY ENCODER that adopts configures, on each change oar motor shaft an absolute value encoder is housed, a redundant absolute value encoder of measuring propeller pitch angle is housed near pitch variable bearings simultaneously, this REDUNDANCY ENCODER needs pinion wheel and pitch variable bearings engagement, detects by pinion drive to become oar direction and angle.When the angular deviation of two scramblers was excessive, pitch-controlled system put away the oars to protect blower fan, prevented that pitch-controlled system continues operation behind the encoder fault.In this scheme, although the precision of redundant absolute value encoder is higher, drive mechanism is complicated, the moment of torsion that REDUNDANCY ENCODER is born is larger, if there is not special-purpose glissando easily to damage scrambler, in addition, the cost of redundant absolute value encoder and interface control module is also higher.

Hall element is a kind of magneto sensor.The switch that utilizes Hall element to make is called proximity Hall switch.When the magnetic object shifted near proximity Hall switch, the Hall element on the switch detection faces changed the switch internal circuit status because producing Hall effect, and near the object that is magnetic the identification thus exists, and then the on-off of gauge tap.

The utility model content

The utility model proposes the pick-up unit of a kind of wind generating set pitch control direction and angle, simple in structure, cost is lower.The technical scheme that the utility model adopts specifically is achieved in that

The utility model provides the pick-up unit of a kind of wind generating set pitch control direction and angle, comprise: pitch variable bearings, mounting bracket of approach switch and proximity Hall switch, described mounting bracket of approach switch is fixed on the position of close described pitch variable bearings ring gear on the wheel hub, two described proximity Hall switchs are fixed on the described mounting bracket of approach switch.

Preferably, the distance of the flank of tooth of described proximity Hall switch and described pitch variable bearings is adjustable.

Preferably, the distance of the longitudinal axis of two described proximity Hall switchs is 1.25 times of pitch variable bearings tooth pitch.

The wind generating set pitch control direction of the utility model specific embodiment and the pick-up unit of angle, simple in structure, cost is lower, and detection method is also fairly simple, and is easy to operate.

Description of drawings

Fig. 1 is the structural representation of the pick-up unit of the wind generating set pitch control direction of the utility model specific embodiment and angle;

Fig. 2 is the proximity Hall switch output signal diagram of the pick-up unit of the wind generating set pitch control direction of the utility model specific embodiment and angle;

Fig. 3 is the signal condition transition diagram of the pick-up unit of the wind generating set pitch control direction of the utility model specific embodiment and angle.

Embodiment

For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with accompanying drawing embodiment of the present utility model is described in detail, it will be more clear making above-mentioned and other purpose of the present utility model, Characteristics and advantages.Reference numeral identical in whole accompanying drawings is indicated identical part.Deliberately do not draw in proportion accompanying drawing, focus on illustrating purport of the present utility model.

Fig. 1 is the structural representation of the pick-up unit of the wind generating set pitch control direction of the utility model specific embodiment and angle, as shown in Figure 1, the wind generating set pitch control direction of the utility model specific embodiment and the pick-up unit of angle, it comprises: pitch variable bearings 1, mounting bracket of approach switch 2 and proximity Hall switch 3, mounting bracket of approach switch 2 is fixed on the position of close pitch variable bearings 1 ring gear on the wheel hub, two proximity Hall switchs 3 are fixed on the mounting bracket of approach switch 2, proximity Hall switch 3 is adjustable with the distance of the flank of tooth of pitch variable bearings, and the distance of the longitudinal axis of two proximity Hall switchs 3 is 1.25 times of pitch variable bearings tooth pitch.

In the utility model specific embodiment, the detection method of the pick-up unit of a kind of wind generating set pitch control direction and angle also is provided, wherein, the pick-up unit of wind generating set pitch control direction and angle comprises: pitch variable bearings 1, mounting bracket of approach switch 2 and proximity Hall switch 3, mounting bracket of approach switch 2 is fixed on the position of close pitch variable bearings 1 ring gear on the wheel hub, two proximity Hall switchs 3 are fixed on the mounting bracket of approach switch 2, proximity Hall switch 3 is adjustable with the distance of the flank of tooth, and the distance of the longitudinal axis of two proximity Hall switchs 3 is 1.25 times of pitch variable bearings tooth pitch; The detection method of the pick-up unit of wind generating set pitch control direction and angle comprises step:

A. two proximity Hall switchs 3 access the high speed counting module that becomes the oar controller by shielded cable;

B. when becoming oar, two proximity Hall switchs 3 are converted into the signal that is similar to square wave with its relative motion with pitch variable bearings 1 ring gear;

C. PLC(Programmable Logic Controller) internal processes is judged the output signal of proximity Hall switch 3 and is calculated direction and the angle that becomes oar.

Fig. 2 is the proximity Hall switch output signal diagram of the pick-up unit of the wind generating set pitch control direction of the utility model specific embodiment and angle, as shown in Figure 2, when pitch variable bearings 1 gear ring rotates, the output signal of two proximity Hall switchs 3 changes, and two proximity Hall switch 3 output signals have following four kinds of status switches:

0（LL）

1（HL）

2（HH）

3（LH）

Fig. 3 is the signal condition transition diagram of the pick-up unit of the wind generating set pitch control direction of the utility model specific embodiment and angle, as shown in Figure 3, when occurring 0, the output signal of two proximity Hall switchs 3 is converted to 2,1 is converted to 3,2 are converted to 0 or 3 is converted at 1 o'clock, can judge the relative position existing problems that two proximity Hall switchs 3 are installed; When the output signal 2 of two proximity Hall switchs 3 is converted to 3, can judge that pitch-controlled system clockwise rotates; When the output signal 3 of two proximity Hall switchs 3 is converted to 2, can judge that pitch-controlled system rotates counterclockwise.

When zero in the pitch-controlled system school, becoming the oar controller is 0 degree with propeller pitch angle demarcation at that time.The number of teeth by pitch variable bearings 1 ring gear can calculate angle corresponding to each pulse signal, when pitch variable bearings 1 clockwise or the moment that rotates counterclockwise, the data that change oar controller obtains according to high-speed counter calculate the angle that pitch variable bearings 1 turns over, thereby increase or reduce corresponding angle, obtain up-to-date propeller pitch angle, and these data are deposited in become oar PLC, and this data power down is kept.

In above description, a lot of details have been set forth so that fully understand the utility model.But above description only is preferred embodiment of the present utility model, and the utility model can be implemented much to be different from alternate manner described here, so the utility model is not subjected to the restriction of top disclosed implementation.Any skilled personnel are not breaking away from the technical solutions of the utility model scope situation simultaneously, all can utilize method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Every content that does not break away from technical solutions of the utility model according to any simple modification, equivalent variations and the modification that technical spirit of the present utility model is done above embodiment, all still belongs in the scope of technical solutions of the utility model protection.

Claims

1. the pick-up unit of a wind generating set pitch control direction and angle, it is characterized in that, comprise: pitch variable bearings, mounting bracket of approach switch and proximity Hall switch, described mounting bracket of approach switch is fixed on the position of close described pitch variable bearings ring gear on the wheel hub, two described proximity Hall switchs are fixed on the described mounting bracket of approach switch.

2. the pick-up unit of wind generating set pitch control direction as claimed in claim 1 and angle is characterized in that, the distance of the flank of tooth of described proximity Hall switch and described pitch variable bearings is adjustable.

3. the pick-up unit of wind generating set pitch control direction as claimed in claim 1 and angle is characterized in that, the distance of the longitudinal axis of two described proximity Hall switchs is 1.25 times of pitch variable bearings tooth pitch.