CN101235800B

CN101235800B - Teeth bar lead screw synchronous variable pitch

Info

Publication number: CN101235800B
Application number: CN2007101570322A
Authority: CN
Inventors: 黄金伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2010-06-02
Anticipated expiration: 2027-11-16
Also published as: CN101235800A

Abstract

A screw rod gear rack synchronous feather is disclosed, whose goal is to modify the hyperfine individual structure of individually independent a set of a servo motor, an accumulator jar, a planet decelerator, a non-contact displacement sensor, a large ring gear and the like in each vane of the three vanes wind power machine, further making the cost reduced. The scheme uses a large gear 5 and another large gear to trisect circle at 120 DEG mutually as gear rack part 1 of 90 DEG feather of the three vanes that is driven by positive gear 6a of a servo motor 6 and realize the three vanes synchronous feather through a gear rack 2, a connector 2a, a three-arm nut 3, a shaft screw rod 4, a big gear 5 (which is fixed on the shaft screw rod 4). The screw rod gear rack synchronous feather has the advantages of using a set of low preparation cost gear and screw rod device that replace respectively individual three sets of feather device.

Description

The teeth bar lead screw synchronous variable pitch device

Technical field

The invention belongs to the wind mill pitch-variable device, realize multi-blade synchronous variable-pitch with single servomotor.

Background technique

Each blade of prior three-blade wind energy conversion system, as if all use and independently possess a whole set of pulp distance varying mechanism separately, though structure is compact, but in problems such as manufacture cost, technical difficulty, fault generation probability and maintenance, have much room for improvement, yet electronic control system must possess a cover as photoelectric encoder, non-contact displacement transducer etc.In addition, each blade independent pitch distance of prior art, just in case there is a slice blade malfunctioning, can rely on the redundant system of electronics to delay to remedy, it is meddlesome to remedy that yes, but in delaying remedial procedures, the blade propeller pitch angle that breaks down is inconsistent and shake, and too significant vibrations also are a kind of unsafe signals.

Summary of the invention

Purpose provides a kind of teeth bar lead screw synchronous variable pitch device, makes every effort to reduce manufacture cost, technical difficulty, fault probability, makes every effort to easy access.

Technological scheme of the present invention is: comprise servomotor, it is characterized in that: described servomotor is installed in the trench between the propeller boss cover at three blade shank places, the part of 1/3 circumference on each blade shank cylinder is adorned intrinsic part gear ring, on this part gear ring tooth bar is housed; The driving gear of described servomotor drives a gearwheel, this gearwheel is solid on an axial filament bar by the key dress, three arm nuts are housed on this axial filament bar, are evenly equipped with mutually every three arms of 120 ° in the periphery of this three arms nut, these three arms are taken over by one respectively and are connected with described tooth bar.

Advantage of the present invention: 1. only replace three original servomotors with a servomotor, three big internal tooths in the original pulp distance varying mechanism have been saved, three planet-gear speed reducers (internal tooth processing cost height) that ring gear is arranged, planetary pinion accuracy of manufacturing height, cost height; 2. this programme is more open, directly perceived than original installation, maintenance is convenient, but also all prevents dust storm sleet in air guide sleeve; 3. easy to manufacture, favourable reducing cost helps wind-powered electricity generation and popularizes development; Among each blade was controlled at synchronously by same gearwheel all the time, the synchronism of feather was the key factor that reduces the wind energy conversion system vibrations.

Description of drawings

Fig. 1 is the sectional drawing of teeth bar lead screw synchronous variable pitch.

Embodiment

Referring to Fig. 1, the upper side edge of Fig. 1, the end portion of blade shank A has only drawn: the 1st, and part gear ring (1/3 gear ring), the 2nd, tooth bar, 2a takes over, and 3 is three arm nuts (the nut periphery is uniform mutually every three arms of 120 °), and the 4th, axial filament bar (two cover bearing 4a and 4b are arranged on the screw mandrel right-hand member axle), the 5th, gearwheel, 6a are driving gears, are that servomotor 6 drives.

The mounting point of servomotor 6 are propeller boss cover B of being in three blade shank A places with the trench of B in, so can stay a position to motor 6 during casting; Also can stay a shallow breach as for dial D, this breach is that it is in the middle of the separation of reversed column C.These component all are static relative to each other.

The driving gear 6a of servomotor 6 drives gearwheel 5,5 is solid on axial filament bar 4 by key 5a dress, so drive axial filament bar 4, rely on bearing 4a and 4b rotation, make axial filament bar 4 drive three arm nuts 3 and move and drive adapter 2a, tooth bar 2, part gear ring 1 to the left or to the right, the 1st, be fastened on the petiole A with screw, so just realize three blade synchronous variable-pitch.

Variable propeller pitch device all in air guide sleeve, if personnel will overhaul, can enter the air guide sleeve from the cabin.

The bearing 4a of axial filament bar 4 and 4b borrow double nut 4c to harmonize, and can rotate in bearing housing 41, and bearing housing 41 is in position, the left end mesopore aperture contact (so only processing slightly at the position, aperture) of main shaft E; Bearing housing 41 dresses lean on its flange (flange) 42 admittedly, are fastened on several pieces of screws and live the central position on the dial D surely.

What represent with capitalization among the figure is the general structural member that belongs to the prior three-blade wind energy conversion system.

Among the figure: sequence number 1 is the part gear ring, is meant whole gear ring of completion of processing, with line cutting it is severed with 120 ° of central angle trisections again, is divided in screw, off-position pin on the cylndrical surface of rachis root of three blades.

Among the figure: according to the design of prior art: wind wheel in fixed cover F load-bearing, and main shaft is transmitting torque only, so in this programme main shaft is drawn as the heavy wall big steel pipe, economizes material and weight reduction first, but the bearing housing 41 of installation shaft screw mandrel 4 second.

Claims

1. teeth bar lead screw synchronous variable pitch device, comprise servomotor, it is characterized in that: described servomotor is installed in the trench between the propeller boss cover at three blade shank places, the part of 1/3 circumference on each blade shank cylinder is adorned intrinsic part gear ring, on this part gear ring tooth bar is housed; The driving gear of described servomotor drives a gearwheel, this gearwheel is solid on an axial filament bar by the key dress, three arm nuts are housed on this axial filament bar, are evenly equipped with mutually every three arms of 120 ° in the periphery of this three arms nut, these three arms are taken over by one respectively and are connected with described tooth bar.