CN101571108B - Two-dimensional vibroswitch device for windmill generator - Google Patents

Abstract

The invention discloses a two-dimensional vibration switch device for a wind power generator, which comprises a casing, a sliding sleeve, a support seat, a swing rod, a sliding rod and a push rod. The bottom of the rod is driven by the swing rod to move up and down in the sliding sleeve, and the push rod is driven by the slide rod to move up and down in the support seat; two contact reeds and moving permanent magnet blocks are fixed on the push rod, and the inner cavity of the support seat The bottom is fixed with a fixed permanent magnet block and two fixed contacts with conductive sheets. The invention has the advantages of compact structure, convenient installation and use, fast and accurate action can be realized without power drive, thereby avoiding the damage of the wind power generator system caused by the excessive vibration of the tower.

Description

Wind turbine two-dimensional vibration switchgear

technical field

The invention relates to a vibration protection device installed on a tower of a wind power generator, in particular to a two-dimensional vibration switch device for a wind power generator.

Background technique

In recent years, wind power generation has achieved rapid development in many areas. However, an important problem in wind power generation is the stability of the wind power generator tower. Due to the high uncertainty of wind energy, if the vibration of the tower in the high wind speed environment is not controlled, the wind turbine will not be able to maintain a stable output power, and even accidents such as damage or breakage of the mechanical structure of the wind turbine system may occur . At home and abroad, some studies on shaft vibration control of wind turbines have been carried out, mostly focusing on dynamic vibration absorbers such as frequency-modulated mass dampers. The control effect of this passive energy dissipation damper cannot be automatically adjusted according to the strength of the wind speed, the control effect is limited, and it cannot provide good safety protection for the wind turbine.

Contents of the invention

The technical problem to be solved by the present invention is to provide a two-dimensional vibration switch device for wind power generators, which is compact in structure, easy to install and use, and can realize fast and accurate actions without power drive, thereby Damage to the wind turbine system caused by excessive vibration of the tower is avoided.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a two-dimensional vibration switch device for wind power generators, characterized in that it includes a housing, a sliding sleeve and a support seat fixedly installed in the housing, and a movably installed The pendulum on the sliding sleeve, the sliding rod and the push rod movably installed on the support seat, wherein the centerlines of the housing, the sliding sleeve, the support seat, the pendulum, the slide bar and the push rod are located on the same straight line; The upper part of the swing rod protrudes above the sliding sleeve and is equipped with an elastic member. The elastic member is vertically arranged and has a mass ball fixed at its upper end, and an inverted cone is fixed at the lower end of the swing rod in the sliding sleeve. platform, and the upper diameter of the inverted conical platform matches the diameter of the sliding sleeve, the swing rod is driven by the mass ball and the elastic member, and swings in the sliding sleeve through the inverted conical platform; the sliding rod The spring seat is arranged below the swing bar, the upper end of the slide bar is fixed with a slide bar round table, and a slide bar return spring is sleeved on the slide bar and between the slide bar round table and the spring seat, and the slide bar Under the action of the sliding rod return spring, it is in close contact with the swing rod, and is driven by the swing rod to move up and down in the sliding sleeve; the upper part of the push rod protrudes above the support seat and a push rod round table is fixed at the upper end. A push rod return spring is set on the push rod and between the push rod round platform and the support seat, and the push rod is in close contact with the slide rod under the action of the push rod return spring, and is driven by the slide rod to move up and down; Two contact reeds and a moving permanent magnet block are fixed on the push rod in the support seat, wherein the moving permanent magnet block is fixed on the lower end of the push rod, and the two contact reeds are arranged symmetrically on the left and right sides of the moving permanent magnet block. Above, the bottom of the inner cavity of the support seat is fixed with a fixed permanent magnet block and two fixed contacts with conductive sheets. The fixed permanent magnet block corresponds to the position of the moving permanent magnet block. The outer side is provided with an annular shoulder, and the two fixed contacts are arranged on the annular shoulder, and correspond to the positions of the two contact reeds respectively, and the height of the annular shoulder is greater than that of the contact on the push rod. The installation distance between the point reed and the moving permanent magnet block.

The upper end port of the sliding sleeve is an inverted tapered port used to limit the swing range of the swing rod, and the diameter of the lower end surface of the inverted tapered port is smaller than the diameter of the sliding sleeve, so as to prevent the inverted cone platform from swinging. Come out of the sliding sleeve.

The elastic member is a swing spring.

The sliding sleeve is inserted through the upper end of the housing.

The supporting seat is fixed in the inner cavity of the casing by screws.

Compared with the prior art, the present invention has the following advantages:

1. The present invention completely adopts mechanical structure, does not need power supply, has compact structure, light weight, convenient installation and use, and reliable performance.

2. The present invention utilizes the non-linear relationship between the distance and the magnetic force between the two permanent magnet blocks, so that the contact reed and the fixed contact quickly pull together when the critical distance is reached, the action is sensitive and reliable, and the response speed is fast.

3. The present invention is mainly applicable to the tower protection of wind power generators, and can also be widely applied to other wind power generation environments. According to different wind power generation power equipment and vibration requirements, mass balls of different masses and springs with different damping parameters are selected to achieve Can meet the requirements of use.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the working state of the present invention.

Fig. 3 is a schematic diagram of the non-linear relationship between the distance between the fixed permanent magnet block and the moving permanent magnet block and the magnetic force in the present invention.

Explanation of reference signs:

1-mass ball; 2-swing spring; 3-swing rod;

4-sliding sleeve; 5-sliding rod return spring; 6-sliding rod;

7-spring seat; 8-push rod return spring; 9-push rod;

10-support seat; 11-contact reed; 12-moving permanent magnet block;

13-fixed permanent magnet block; 14-conductive piece; 15-fixed contact;

16 - Housing.

Detailed ways

As shown in Figure 1, the present invention includes a housing 16, a sliding sleeve 4 and a support base 10 that are arranged up and down and are fixedly installed in the housing 16, a swing bar 3 and a sliding bar 6 that are movably installed on the sliding sleeve 4, and a movable The push rod 9 installed on the support base 10, the centerlines of the housing 16, the sliding sleeve 4, the support base 10, the fork 3, the slide bar 6 and the push rod 9 are located on the same straight line. Wherein, the upper part of the swing rod 3 protrudes above the sliding sleeve 4, and an elastic member is installed on the upper part of the swing rod 3, the elastic member is arranged in a vertical direction and the upper end is fixed with a mass ball 1, which is located on the sliding sleeve 4. The lower end of the inner pendulum 3 is fixed with an inverted conical platform, and the upper diameter of the inverted conical platform matches the diameter of the sliding sleeve 4. The pendulum 3 is driven by the mass ball 1 and the elastic member, and passes through the inverted conical platform in the sliding sleeve 4. swing in a two-dimensional direction. The slide bar 6 is arranged below the swing bar 3 through the spring seat 7, the upper end of the slide bar 6 is fixed with a slide bar round table, and the slide bar reset spring 5 is set on the slide bar 6 and between the slide bar round table and the spring seat 7 , the slide rod 6 is in close contact with the swing rod 3 under the action of the slide rod return spring 5, that is, the upper surface of the slide rod circular table is closely opposed to the lower surface of the inverted conical platform, and when the swing rod 3 swings, the inverted cone platform is pressed downward The slide bar round table then makes the slide bar 6 move up and down in the slide sleeve 4. The upper part of the push rod 9 protrudes above the support seat 10, the upper end of the push rod 9 is fixed with a push rod round table, and a push rod return spring 8 is set on the push rod 9 and between the push rod round table and the support seat 10 , the push rod 9 is in close contact with the slide rod 6 under the action of the push rod return spring 8, that is, the upper surface of the push rod round table is closely against the lower end surface of the slide rod 6, when the slide rod 6 moves up and down, the lower end of the slide rod 6 Press down the push rod round table, and then make the push rod 9 move up and down in the support seat 10. Two contact reeds 11 and a moving permanent magnet block 12 are fixed on the push rod 9 located in the support seat 10, wherein the moving permanent magnet block 12 is in the shape of a circular platform and is fixed on the lower end of the push rod 9, and the two contacts The reed 11 is symmetrically arranged on the top of the moving permanent magnet block 12. The bottom of the inner cavity of the support base 10 is fixed with a fixed permanent magnet block 13 and two fixed contacts 15 with conductive sheets 14. The fixed permanent magnet block 13 is Conical shape and corresponding to the position of the moving permanent magnet block 12, an annular shoulder is arranged on the outside of the fixed permanent magnet block 13, and the two fixed contacts 15 are all arranged on the annular shoulder, and the two fixed contacts 15 and the two Each contact reed 11 positions correspond respectively, and the height of the annular shoulder is greater than the installation distance between the contact reed 11 on the push rod 9 and the moving permanent magnet block 12, to prevent the present invention from moving the permanent magnet block 12 during work. It is completely sucked together with the fixed permanent magnet block 13.

In this embodiment, the upper end port of the sliding sleeve 4 is an inverted tapered port, so that when the mass ball 1 swings too much, the swing rod 3 will tilt and press against the tapered surface of the inverted tapered port, thereby avoiding All components were damaged due to the excessive swing of mass ball 1. In addition, the radial elastic force of the elastic member can also absorb part of the energy of the mass ball 1 . The diameter of the lower end surface of the inverted conical port is smaller than the diameter of the sliding sleeve 4 to prevent the inverted conical platform from slipping out of the sliding sleeve 4 when swinging. Elastic member is swing spring 2. The sliding sleeve 4 is inserted and fixed on the upper end of the housing 16 . The support base 10 is fixed in the inner cavity of the housing 16 by screws.

As shown in Figure 2, the working process of the present invention is: at first, the present invention is installed on the tower of wind-driven generator, and the signal transmission circuit is connected between two conductive sheets 14, and the signal transmission circuit is connected with the control system , the control system performs excessive vibration protection for the wind turbine according to the received signal. In this way, when the tower vibrates, the mass ball 1 swings in the two-dimensional direction with the vibration of the tower, and because the lower end of the swing rod 3 is fixed with an inverted conical platform, and the upper diameter of the inverted conical platform is the same as that of the sliding sleeve 4 The diameters match, so the mass ball 1 and the swing spring 2 can drive the swing rod 3 to swing in the two-dimensional direction in the sliding sleeve 4; while the inverted conical platform is swinging, it drives the sliding rod 6 to move up and down in the sliding sleeve 4 , the slide bar 6 drives the push rod 9 to move up and down in the support seat 10, and the contact reed 11 and the moving permanent magnet block 12 keep moving away from or approaching the fixed permanent magnet block 13 and the conductive sheet 14 with the up and down movement of the push rod 9.

Since the relationship between the distance S and the magnetic force F between the fixed permanent magnet 13 and the moving permanent magnet 12 is a nonlinear relationship, as shown in Figure 3, the abscissa S is between the fixed permanent magnet 13 and the moving permanent magnet 12. distance, the ordinate F is the magnetic force between the fixed permanent magnet block 13 and the moving permanent magnet block 12, when the downward pressure acting on the slide bar round platform due to the swing of the mass ball 1, plus the fixed permanent magnet block 13 and the moving permanent magnet block 12, When the sum of the magnetic forces between the moving permanent magnet blocks 12 is less than the elastic force sum of the slide bar return spring 5 and the push bar return spring 8, the contact reed 11 and the fixed contact 15 are not in contact.

When the distance between the moving permanent magnet piece 12 and the fixed permanent magnet piece 13 just reached the critical distance, the magnetic force between the moving permanent magnet piece 12 and the fixed permanent magnet piece 13 suddenly increased substantially, and the push rod 9 overcomes the slide bar return spring The elastic force of 5 and the elastic force of the push rod return spring 8 move downward, and make the two contact reeds 11 and the two fixed contacts 15 correspond to each other. At this time, the connection between the two conductive sheets 14 The signal sending circuit is turned on and sends out a control signal, and the control system protects the wind turbine according to the signal.

Under the situation that two contact reeds 11 are attracted to two fixed contacts 15, when the vibration amplitude of the tower is less than the preset rated amplitude of the present invention, due to the elastic force of contact reeds 11, Due to the comprehensive action of the elastic force of the slide bar return spring 5 and the elastic force of the push rod return spring 8, the push rod 9 moves upward, the two contact reeds 11 are separated from the two fixed contacts 15, and the signal sending circuit is disconnected.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present invention still belong to the technology of the present invention. within the scope of protection of the scheme.

Claims (5)

1. two-dimensional vibroswitch device for windmill generator, it is characterized in that: comprise housing (16), be fixedly mounted on flip sleeve (4) and supporting base (10) in the described housing (16), be movably arranged on fork (3) and the slide bar (6) on the flip sleeve (4) and be movably arranged on push rod (9) on the supporting base (10), wherein, the center line of described housing (16), flip sleeve (4), supporting base (10), fork (3), slide bar (6) and push rod (9) is located on the same line; The epimere of described fork (3) partly stretches out in the top of flip sleeve (4) and elastic component is installed, described elastic component vertically be provided with and thereon the end be fixed with mass ball (1), the underpart that is positioned at the inherent fork of flip sleeve (4) (3) is fixed with the inverted cone platform, and the upper diameter of described inverted cone platform matches with the diameter of flip sleeve (4), described fork (3) is driven by mass ball (1) and described elastic component, and swings in flip sleeve (4) by described inverted cone platform; Described slide bar (6) is arranged on the below of fork (3) by spring seat (7), the upper end portion of described slide bar (6) is fixed with the slide bar round platform, go up and be positioned between described slide bar round platform and the spring seat (7) at slide bar (6) and be set with slide bar Returnning spring (5), described slide bar (6) closely contacts with fork (3) under the effect of slide bar Returnning spring (5), and is moved up and down in flip sleeve (4) by fork (3) drive; The epimere of described push rod (9) partly stretches out and is fixed with the push rod round platform in the top of supporting base (10) and in the upper end portion, go up and be positioned between described push rod round platform and the supporting base (10) at push rod (9) and be set with push rod Returnning spring (8), described push rod (9) closely contacts with slide bar (6) under the effect of push rod Returnning spring (8), and is moved up and down by slide bar (6) drive; Be positioned on the push rod (9) of supporting base (10) and be fixed with two contact reeds (11) and motion permanent magnetic piece (12), wherein, motion permanent magnetic piece (12) is fixed on the underpart of push rod (9), two contact reeds (11) are symmetrical set the top in motion permanent magnetic piece (12), the intracavity bottom of described supporting base (10) is fixed with fixedly permanent magnets (13) and two fixed contacts (15) that all have conducting plate (14), described fixedly permanent magnets (13) is corresponding with motion permanent magnetic piece (12) position, in the fixing arranged outside of permanent magnets (13) annular shoulder is arranged, described two fixed contacts (15) all are arranged on the described annular shoulder, and corresponding respectively with the position of two contact reeds (11), the height of described annular shoulder is greater than contact reed (11) on the push rod (9) and the mounting distance between the motion permanent magnetic piece (12).

2. according to the described two-dimensional vibroswitch device for windmill generator of claim 1, it is characterized in that: the upper end port of described flip sleeve (4) is for being used to limit the inverted cone port of fork (3) amplitude of fluctuation, and the lower end surface diameter of described inverted cone port is deviate from flip sleeve (4) when swinging to prevent described inverted cone platform less than the diameter of described flip sleeve (4).

3. according to claim 1 or 2 described two-dimensional vibroswitch device for windmill generator, it is characterized in that: described elastic component is swing spring (2).

4. according to claim 1 or 2 described two-dimensional vibroswitch device for windmill generator, it is characterized in that: the interspersed upper end portion that is arranged on housing (16) of described flip sleeve (4).

5. according to claim 1 or 2 described two-dimensional vibroswitch device for windmill generator, it is characterized in that: described supporting base (10) is by the inner chamber of screw in housing (16).

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