Rotating speed sensor and fan generator set

Abstract

The embodiment of the invention provides a rotating speed sensor and a fan generator set. The rotating speed sensor is used for detecting the rotating speed of the rotating disc, a plurality of magnetic parts are arranged on the rotating disc, and the rotating speed sensor comprises a magnetic induction part which is movably arranged on one side of the rotating disc and used for moving to a set position under the magnetic force effect of the magnetic parts within the induction range in the rotating process of the rotating disc; and the detection module is connected with the magnetic force induction piece and is used for generating detection information for determining the rotating speed of the turntable when the magnetic force induction piece moves to a set position. And the rotating speed of the turntable can be accurately detected.

Description

Technical Field

[0001] The invention relates to the field of wind power generation, and in particular to a rotation speed sensor and a wind turbine generator set. Background Art

[0002] In the prior art, metal sensors are usually used in conjunction with bolt heads to detect the rotation speed of the impeller of a wind turbine. Specifically, a countersunk hole or through hole is opened circumferentially on the brake disc connected to the impeller, and a bolt head is installed in the hole. The bolt head on the brake disc is driven to rotate during the rotation of the impeller. The metal sensor picks up the signal by identifying the bolt head and outputs the detection information to determine the impeller rotation speed. However, since the metal sensor needs to accurately detect the bolt head, the position accuracy of the metal sensor and the bolt head is relatively high. During the installation process, it is generally necessary to debug repeatedly in order to find a suitable signal pickup position, and it is easy for the signal to jump or fail due to installation errors. Summary of the invention

[0003] Therefore, an object of the present invention is to provide a rotation speed sensor and a wind turbine generator set, so as to at least solve the problem that the rotation speed sensor has high installation requirements and is prone to signal jump or failure due to installation errors.

[0004] A first aspect of the present invention provides a speed sensor for detecting the speed of a turntable. A plurality of magnetic parts are arranged on the turntable. The speed sensor includes: a magnetic sensing part movably arranged on one side of the turntable, and the magnetic sensing part is used to move to a set position under the magnetic force of the magnetic parts within the sensing range during the rotation of the turntable; a detection module connected to the magnetic sensing part, and the detection module is used to generate detection information for determining the speed of the turntable when the magnetic sensing part moves to the set position.

[0005] The speed sensor provided in the embodiment of this aspect is equipped with a mechanically movable magnetic sensing part. The magnetic sensing part can move under the magnetic force of the magnetic part within the sensing range to respond to the rotation of the turntable, and cooperate with the detection module to generate detection information for determining the speed of the turntable when it moves to the set position. Compared with simply relying on the metal sensor to sense the metal bolt head, this mechanical speed sensing method can more stably and reliably reflect the rotation of the turntable and can effectively avoid signal interference. Moreover, when installing multiple magnetic parts and speed sensors, even if there is a slight deviation in the installation position of individual magnetic parts, the magnetic sensing part can still move to the set position under the action of the magnetic field under the influence of the magnetic field, without repeated debugging to find a suitable signal pickup position. The installation is simple and convenient, and can avoid recognition errors or mistakes caused by improper installation, which is conducive to accurate detection of the speed.

[0006] A second aspect of the present invention provides a wind turbine generator set, comprising: a rotating disk; and a rotation speed sensor as described in the above embodiment.

[0007] The wind turbine generator set provided in the embodiment of this aspect has the rotation speed sensor of the above embodiment, and thus has the beneficial effects of the above embodiment, which will not be described in detail here.

[0008] Additional aspects and / or advantages of the present general inventive concept will be set forth in part in the following description and in part will be obvious from the description, or may be learned through practice of the present general inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and other objects and features of the present invention will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0010] Figure 1 A schematic diagram showing the structure of a rotation speed sensor according to a first embodiment of the present application is shown;

[0011] Figure 2 A schematic diagram of the local structure of the rotation speed sensor and the rotating disk in cooperation with each other in the first embodiment of the present application is shown;

[0012] Figure 3 A schematic structural diagram of a rotation speed sensor according to a second embodiment of the present application is shown;

[0013] Figure 4 A partial structural schematic diagram of the rotation speed sensor and the rotating disk in cooperation with each other according to the second embodiment of the present application is shown;

[0014] Figure 5 A schematic structural diagram of a rotation speed sensor according to a third embodiment of the present application is shown;

[0015] Figure 6 A partial structural schematic diagram of the rotation speed sensor and the rotating disk in cooperation with each other according to the fourth embodiment of the present application is shown;

[0016] Figure 7 A schematic structural diagram of a rotation speed sensor according to a fifth embodiment of the present application is shown;

[0017] Figure 8 A partial structural schematic diagram of the rotation speed sensor and the rotating disk in cooperation with each other according to the fifth embodiment of the present application is shown;

[0018] Fig. 9 A schematic diagram showing the structure of a rotation speed sensor and a rotating disk in cooperation with each other according to an embodiment of the present application is shown;

[0019] Fig.10A schematic structural diagram of a rotation speed sensor and a turntable in cooperation with each other according to another embodiment of the present application is shown.

[0020] Figures 1 to 10 Description of Figure Numbers:

[0021] 10 turntables, 110 magnetic parts,

[0022] 20 magnetic induction member, 201 first induction part, 202 second induction part, 210 rotating shaft, 220 magnetic induction part, 221 shift fork, 222 magnetic induction unit,

[0023] 30 detection module, 310 first conductive part, 311 first conductive rotating part, 312 second conductive rotating part, 320 second conductive part, 321 first conductive detection part, 322 second conductive detection part,

[0024] 40 insulation pieces. DETAILED DESCRIPTION

[0025] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted.

[0026] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and / or systems described herein, which will be clear after understanding the disclosure of the present application.

[0027] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more.

[0028] Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer, or first portion referred to in the examples may also be referred to as the second member, second component, second region, second layer, or second portion.

[0029] In the specification, when an element such as a layer, a region or a substrate is described as being “on”, “connected to” or “coupled to” another element, the element may be directly “on”, “connected to” or “coupled to” another element, or one or more other elements may be present therebetween. Conversely, when an element is described as being “directly on”, “directly connected to” or “directly coupled to” another element, other elements may not be present therebetween.

[0030] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprise", "include" and "have" indicate the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof. The term "plurality" represents any number of two and more than two.

[0031] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as those generally understood by ordinary technicians in the field to which the present invention belongs after understanding the present invention. Unless explicitly defined as such herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and the present invention, and should not be interpreted in an idealized or overly formal way.

[0032] The speed sensors currently used to detect the impellers of wind turbines are generally metal sensors that use metal sensors to identify the bolt heads or holes on the brake discs. The installation process generally requires repeated debugging to find the appropriate signal pickup position, which is inconvenient to install and is prone to signal jumps or failures due to installation errors.

[0033] Based on this, the present invention proposes a solution for measuring the rotation speed and direction by using magnetic force as the signal source of a mechanical sensor, which has the advantages of simple and convenient installation, high reliability, and low signal interference.

[0034] In addition, the rotation speed sensor proposed in the present invention can be used to detect the rotation speed of the impeller of the wind turbine generator set, and can also be used to detect the rotation speed of other components of the wind turbine generator set. Of course, it may not be used in the wind turbine generator set.

[0035] The following will be combined Figures 1 to 10 The rotation speed sensor according to the embodiment of the present invention is described in detail.

[0036] like Figures 1 to 10As shown, a speed sensor is used to detect the speed of a turntable 10. A plurality of magnetic parts 110 are arranged on the turntable 10. The speed sensor includes: a magnetic sensing part 20, which is movably arranged on one side of the turntable 10. The magnetic sensing part 20 is used to move to a set position under the magnetic force of the magnetic parts 110 within the sensing range during the rotation of the turntable 10; a detection module 30, which is connected to the magnetic sensing part 20. The detection module 30 is used to generate detection information for determining the speed of the turntable 10 when the magnetic sensing part 20 moves to the set position.

[0037] The rotation speed sensor provided in the embodiment of this aspect is equipped with a mechanically movable magnetic sensing component 20. The magnetic sensing component 20 can move under the magnetic force of the magnetic component 110 within the sensing range to respond to the rotation of the turntable 10, and cooperate with the detection module 30 to generate detection information for determining the rotation speed of the turntable 10 when it moves to the set position. Compared with simply relying on the metal sensor to sense the metal bolt head, this mechanical rotation speed sensing method can more stably and reliably reflect the rotation of the turntable 10, and can effectively avoid signal interference. Moreover, when installing multiple magnetic components 110 and rotation speed sensors, even if there is a slight deviation in the installation position of individual magnetic components 110, affected by the magnetic field, the magnetic sensing component 20 can still move to the set position under the action of the magnetic field, without repeated debugging to find a suitable signal pickup position. The installation is simple and convenient, and can avoid recognition errors or errors caused by improper installation, which is conducive to accurate detection of the rotation speed and is not sensitive to manufacturing accuracy.

[0038] In a specific application, as the turntable 10 rotates counterclockwise or clockwise, multiple magnetic parts 110 approach and move away from the magnetic sensing part 20 of the speed sensor in turn. The magnetic sensing part 20 can move to the set position in turn under the magnetic force of each adjacent magnetic part 110, or move to the set position under the magnetic force of two or more adjacent magnetic parts 110, and rely on the detection module 30 to generate detection information for determining the speed of the turntable 10. When the number of magnetic parts 110 installed on the turntable 10 is certain, the detection module 30 can be relied on to generate the detection information The number of times and time intervals to determine the time taken for the turntable 10 to rotate one circle, and then accurately obtain the speed of the turntable 10. Of course, it is also possible to continuously detect the time taken for the turntable 10 to rotate multiple circles, or calculate the average of the time taken for the turntable 10 to rotate one circle multiple times, to obtain the speed of the turntable 10. A variety of calculation methods can be used, which are not listed here one by one.

[0039] Optionally, the rotating disc 10 may be a brake disc, and the rotating disc 10 is connected to the impeller of the wind turbine generator set and rotates synchronously with the impeller, so that the rotation speed of the impeller can be determined by a rotation speed sensor.

[0040] Optionally, a plurality of magnetic members 110 are attached to the turntable 10 , so that there is no need to drill holes or through holes on the turntable 10 , which can significantly reduce the hole drilling cost and allows for flexible and convenient arrangement of the magnetic members 110 .

[0041] Optionally, a plurality of recessed grooves (not shown in the figure) are provided on the turntable 10, and a plurality of magnetic components 110 are embedded in the plurality of recessed grooves one by one. On the one hand, the installation stability of the plurality of magnetic components 110 can be improved, and on the other hand, the plurality of magnetic components 110 can be prevented from protruding out of the turntable 10 and interfering with the speed sensor.

[0042] Optionally, multiple magnetic members 110 are distributed at intervals, such as at equal intervals, along the circumference of the turntable 10. Thus, during the rotation of the turntable 10, the magnetic sensing member 20 can move relatively smoothly under the magnetic force of the evenly distributed magnetic members 110, so that the detection module 30 can accurately output information to determine the rotation speed of the turntable 10.

[0043] Optionally, the magnetic member 110 is a strong magnetic sheet made of permanent magnetic material, has good magnetic attraction, occupies little space, and is not prone to interference with surrounding components.

[0044] Optionally, the magnetic sensing component 20 has magnetic adsorption force, for example, the magnetic sensing component 20 is a permanent magnet or a structure that generates magnetism when powered. At this time, the magnetic poles of multiple magnetic components 110 facing the side of the speed sensor are the same, and each magnetic component 110 and the magnetic sensing component 20 can attract each other. Under the multiple effects of multiple magnetic fields, the magnetic sensing component 20 can be more easily moved to the set position under the magnetic force of the magnetic component 110, and the speed sensor detection is sensitive and reliable.

[0045] Of course, the magnetic sensing component 20 may also not have magnetic attraction force, for example, the magnetic sensing component 20 is an iron component, an iron contact, in which case the magnetic poles of the multiple magnetic components 110 facing the speed sensor may be the same or different, and all of them may generate magnetic attraction force on the magnetic sensing component 20. This facilitates the rapid assembly of multiple magnetic components 110 without considering the direction of the magnetic poles, and saves costs.

[0046] Optionally, the speed sensor further includes a plastic shell (not shown in the figure), and the plastic shell is selected to encapsulate the speed sensor to improve the protection performance. In addition, the plastic shell can improve the aesthetics and protection performance through appropriate industrial design.

[0047] Regarding how the detection module 30 generates detection information for determining the rotation speed of the turntable 10 when the magnetic sensing element 20 moves to the set position, further, in some embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the detection module 30 includes a first conductive part 310 and a second conductive part 320, and the first conductive part 310 is connected to the magnetic sensing part 20. When the first conductive part 310 moves to a set position along with the magnetic sensing part 20, the first conductive part 310 and the second conductive part 320 are directly or indirectly contacted to conduct with each other, generating detection information.

[0048] In these embodiments, the first conductive part 310 and the second conductive part 320 are in contact with each other to conduct the detection circuit, thereby generating detection information to determine that the magnetic sensing part 20 has moved into position. The detection is sensitive and reliable, and it is not easy to make a misjudgment, and it will not happen that the magnetic sensing part 20 moves into position but the detection module 30 fails to detect it in time, thereby improving the detection accuracy of the speed sensor. In addition, the detection is carried out using a purely mechanical structure, which is highly reliable and has no signal interference risk.

[0049] In a specific application, the first conductive part 310 may have a first terminal, and the second conductive part 320 may have a second terminal. The first terminal and the second terminal may be connected to a power supply in advance to form a detection circuit. As the turntable 10 rotates, the magnetic sensing part 20 can move under the magnetic force of the magnetic part 110 within the sensing range and drive the first conductive part 310 to move, so that the first conductive part 310 and the second conductive part 320 are in contact with each other to conduct the detection circuit, thereby realizing the generation of electrical signals and generating detection information.

[0050] It should be noted that in the present invention, the first conductive part 310 and the second conductive part 320 may be in direct contact or indirect contact, and the requirement for generating detection information can be met as long as the two are conductive. Specifically, the magnetic sensing part 20 may also be a conductive part, so that the first conductive part 310 may be in contact with the second conductive part 320 via the magnetic sensing part 20, and the current flows through the first conductive part 310, the magnetic sensing part 20 and the second conductive part 320 to achieve conductivity and generate detection information.

[0051] To facilitate the first conductive part 310 to move with the magnetic induction component 20, further, as Figure 1 and Figure 3 As shown, the first conductive part 310 includes an elastic conductive component, such as a conductive spring, which can bend and deform to contact the second conductive part 320 as the magnetic part 110 approaches, or automatically reset after the magnetic part 110 moves away, so that it can bend and deform again to contact the second conductive part 320 to generate detection information when the next magnetic part 110 approaches.

[0052] Furthermore, if Figure 1 and Figure 3As shown, the second conductive part 320 includes a conductive electrode plate. It has strong conductivity, which is convenient for generating detection information. It also has a certain structural strength and is not easy to bend, thereby ensuring that the first conductive part 310 can contact the second conductive part 320 after moving into position.

[0053] Furthermore, if Figure 1 and Figure 3 As shown, the first conductive part 310 is connected to the insulating member 40 , and the second conductive part 320 is connected to the insulating member 40 .

[0054] Furthermore, if Figure 1 and Figure 3 As shown, the magnetic induction element 20 is disposed at one end of the first conductive part 310, and the other end of the first conductive part 310 is connected to the second conductive part 320 through the insulating element 40. The insulating element 40 can be distributed between the first conductive part 310 and the second conductive part 320, which will not affect the movement of the first conductive part 310 and prevent the first conductive part 310 and the second conductive part 320 from contacting each other by mistake and thus generating detection information by mistake.

[0055] In a specific application, the insulating member 40 may be an insulating block made of insulating material.

[0056] Regarding the conduction mode between the first conductive part 310 and the second conductive part 320, further, as Figure 1 and Figure 2 As shown, the second conductive part 320 includes a first conductive detection part 321 and a second conductive detection part 322. The first conductive part 310 can be in direct or indirect contact with the first conductive detection part 321 and the second conductive detection part 322 during the counterclockwise rotation of the turntable 10 to be mutually conductive, and the first conductive part 310 can also be in direct or indirect contact with the first conductive detection part 321 and the second conductive detection part 322 during the clockwise rotation of the turntable 10 to be mutually conductive.

[0057] Here, the first conductive part 310 can be connected to the first conductive detection part 321 and the second conductive detection part 322 in turn when the turntable 10 rotates counterclockwise, and can be connected to the second conductive detection part 322 and the first conductive detection part 321 in turn when the turntable 10 rotates clockwise. Since the detection information generated preferentially in different rotation directions of the turntable 10 is different, the generated detection information can be used not only to determine the rotation speed of the turntable 10, but also to determine the direction of rotation of the turntable 10.

[0058] In a specific application, the magnetic sensing component 20 and the first conductive part 310 can be distributed between the first conductive detection part 321 and the second conductive detection part 322, so that the magnetic sensing component 20 drives the first conductive part 310 to reciprocate between the first conductive detection part 321 and the second conductive detection part 322 under the action of the magnetic force of the magnetic component 110.

[0059] As an example, Figure 1 and Figure 2 As shown, the first conductive part 310 is a conductive spring, the first conductive detection part 321 and the second conductive detection part 322 are both conductive plates, the conductive spring is located between the two conductive plates, one of the conductive plates and the conductive spring are connected in the detection circuit 1, and the other conductive plate and the conductive spring are connected in the detection circuit 2, an insulating member 40 is arranged between the two conductive plates and the conductive spring, and one end of the conductive spring away from the insulating member 40 is connected to the magnetic sensing member 20. As the turntable 10 rotates counterclockwise, the magnetic sensing member 20 can move under the magnetic force of the magnetic member 110 within the sensing range and drive the conductive spring to conduct with one of the conductive plates, so as to realize the conduction of the detection circuit 1 and generate the detection information 1. As the turntable 10 continues to rotate, the magnetic member 110 moves in the direction of the other conductive plate, and the magnetic sensing member 20 moves in the direction of the other conductive plate to drive the conductive spring to conduct with the conductive plate, so as to realize the conduction of the detection circuit 2 and generate the detection information 2. As the turntable 10 continues to rotate, the above actions are repeated. The rotation speed and direction of the turntable 10 can be obtained based on the time when the detection information type is generated.

[0060] Of course, the second conductive part 320 may include a third conductive detection part, a fourth conductive detection part, etc. in addition to the first conductive detection part 321 and the second conductive detection part 322. The number of the first conductive parts 310 is one less than the number of the conductive detection parts. Each first conductive part 310 is distributed between two conductive detection parts and moves between the two conductive detection parts. Multiple conductive detection parts and at least one first conductive part 310 are used to detect the rotation speed of the turntable 10 to improve the detection accuracy.

[0061] Or further, Figure 3 and Figure 4 As shown, the second conductive part 320 includes a first conductive detection part 321 and a second conductive detection part 322. The first conductive part 310 includes a first conductive rotating part 311 and a second conductive rotating part 312, and the magnetic sensing member 20 includes a first sensing part 201 connected to the first conductive rotating part 311 and a second sensing part 202 connected to the second conductive rotating part 312. The first conductive rotating part 311 is electrically connected to the first conductive detection part 321 during the counterclockwise rotation of the turntable 10, and the second conductive rotating part 312 is electrically connected to the second conductive detection part 322 during the clockwise rotation of the turntable 10.

[0062] Here, the first conductive detection part 321 and the second conductive detection part 322 can be arranged side by side along the circumference of the turntable 10, and the first conductive rotating part 311 and the second conductive rotating part 312 can be arranged side by side along the circumference of the turntable 10. The rotation speed sensor can be arranged in a plane that is roughly parallel to the plane where the turntable 10 is located, and the first conductive part 310 and the second conductive part 320 can be arranged along the radial direction of the turntable. The first conductive rotating part 311 and the first conductive detection part 321 are arranged opposite to each other in the axial direction of the turntable 10, the first conductive detection part 321 is close to the turntable 10, the first conductive rotating part 311 is located on the side of the first conductive detection part 321 away from the turntable 10, and the first conductive rotating part 311 and the first conductive detection part 321 are connected in the detection circuit one. The second conductive rotating part 312 and the second conductive detecting part 322 are arranged opposite to each other in the axial direction of the rotating disk 10, and the second conductive rotating part 312 is located on the side of the second conductive detecting part 322 away from the rotating disk 10, and the second conductive rotating part 312 and the second conductive detecting part 322 are connected in the detection circuit 2. Therefore, during the counterclockwise rotation of the rotating disk 10, the first conductive rotating part 311 can be driven by the first sensing part 201 to conduct with the first conductive detecting part 321 first, and generate detection information 1, and then as the rotating disk 10 continues to rotate, the second conductive rotating part 312 is driven by the second sensing part 202 to conduct with the second conductive detecting part 322, and generate detection information 2, and as the rotating disk 10 continues to rotate, the above actions are repeated. On the contrary, during the clockwise rotation of the turntable 10, the second conductive rotating part 312 can be driven by the second sensing part 202 to conduct with the second conductive detection part 322 first, generating detection information 2, and then as the turntable 10 continues to rotate, the first conductive rotating part 311 is driven by the first sensing part 201 to conduct with the first conductive detection part 321, generating detection information 1, and the above-mentioned actions are repeated as the turntable 10 continues to rotate. Since the detection information generated first in different rotation directions of the turntable 10 is different, the generated detection information can be used not only to determine the rotation speed of the turntable 10, but also to determine the direction of rotation of the turntable 10.

[0063] Of course, the second conductive part 320 may include a third conductive detection part, a fourth conductive detection part, etc. in addition to the first conductive detection part 321 and the second conductive detection part 322. The first conductive part 310 may include a third conductive rotation part, a fourth conductive rotation part, etc. in addition to the first conductive rotation part 311 and the second conductive rotation part 312. The induction part of the magnetic induction part 20 is provided on each conductive rotation part. The conductive detection parts and the conductive rotation parts are distributed one by one. Multiple conductive detection parts and multiple conductive rotation parts are used to detect the rotation speed of the turntable 10 to improve the detection accuracy.

[0064] Regarding how the detection module 30 generates detection information for determining the rotation speed of the turntable 10 when the magnetic sensing element 20 moves to the set position, further, in other embodiments, such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the detection module 30 includes an encoder, and the magnetic sensing component 20 includes a rotating shaft 210 and a magnetic sensing portion 220 , and the magnetic sensing portion 220 is connected to the encoder through the rotating shaft 210 .

[0065] In these embodiments, the magnetic force of the magnetic member 110 is utilized to cause the magnetic sensing portion 220 to rotate along with the rotation of the turntable 10, thereby forming a mechanical rotational motion input mechanism. An encoder is utilized to generate detection information for determining the rotational speed of the turntable 10 based on the rotation of the shaft 210. The detection is sensitive and reliable, is not prone to misjudgment, and is not easily interfered by signals, thereby improving the detection accuracy of the rotational speed sensor.

[0066] Regarding the structure of the magnetic sensing unit 220, in the first specific embodiment, as shown in FIG. Figure 5 and Figure 6 As shown, the magnetic sensing unit 220 includes a plurality of shift forks 221 distributed along the circumference of the rotating shaft 210, and a magnetic sensing unit 222 is provided at the end of each shift fork 221. As the turntable 10 rotates, one magnetic sensing unit 222 can drive the plurality of shift forks 221 to rotate by a certain angle under the magnetic force of the magnetic member 110 within the sensing range, and as the turntable 10 and the magnetic sensing unit 220 rotate, another magnetic sensing unit 222 can also continue to drive the plurality of shift forks 221 to rotate by a certain angle under the magnetic force of the magnetic member 110 within the sensing range, and so on, which is conducive to realizing the continuous rotation of the magnetic sensing unit 220 as the turntable 10 rotates, thereby accurately reflecting the rotation of the turntable 10.

[0067] Furthermore, if Figure 5 As shown, the magnetic sensing unit 222 is a magnetic strip. The magnetic strip itself has magnetic poles, which can better cooperate with the magnetic member 110, thereby driving the magnetic sensing unit 220 to rotate as a whole. Figure 6 As shown, the magnetic sensing unit 222 may also be a magnetic sheet.

[0068] The magnetic poles of any two adjacent magnetic sensing units 222 on the circumference of the rotating shaft 210 away from the rotating shaft 210 are different, and the magnetic poles of any two adjacent magnetic sensing units 222 on the circumference of the rotating shaft 210 close to the rotating shaft 210 are different. The magnetic poles of any two adjacent magnetic members 110 on the side facing the speed sensor are different. Figure 5 and Figure 6After the S pole of the first magnetic sensing unit 222 matches the N pole of the first magnetic member 110, as the turntable 10 rotates counterclockwise, the N pole of the second magnetic sensing unit 222 will approach the S pole of the second magnetic member 110, thereby causing the magnetic sensing unit 220 to rotate as a whole by a certain angle under the action of the mutual attraction between the two. At the same time, the N pole of the second magnetic sensing unit 222 will also repel the N pole of the first magnetic member 110, which will also cause the magnetic sensing unit 220 to rotate as a whole by a certain angle, which is conducive to ensuring that the magnetic sensing unit 220 rotates smoothly with the rotation of the turntable 10 and accurately reflects the rotation of the turntable 10. Moreover, during the rotation of the turntable 10, when the magnetic member 110 approaches the magnetic sensing unit 222 on the fork 221, it will automatically allocate the NS poles for matching under the action of the magnetic attraction. Although the two sides are not in contact, the turntable 10 will drive the magnetic sensing unit 220 to rotate under the action of the magnetic force, which is conducive to the encoder to accurately identify the speed and rotation direction.

[0069] In the second specific embodiment, the magnetic force sensing part 220 includes a plurality of forks 221 distributed along the circumference of the rotating shaft 210. The forks 221 are made of ferromagnetic material, and the width of the forks 221 gradually decreases in the direction away from the rotating shaft 210. Compared with the first specific embodiment, the magnetic strip installed on the fork 221 is removed, and the position of the fork 221 is adjusted so that the fork 221 is closer to the brake disc. In this case, the shape of the fork 221 can be made narrower and narrower along the extension direction, such as Figure 5 and Figure 6 As shown in the middle fork 221, and the main material of the fork 221 needs to be replaced with a ferromagnetic material, which can ensure that during the operation, when the upper fork 221 is separated from the magnetic part 110, the material area of ​​the fork 221 body and the magnetic part 110 that attract each other becomes smaller and smaller, and the magnetic force becomes smaller and smaller, while during the synchronous rotation of the lower fork 221, the material area of ​​the fork 221 body and the magnetic part 110 that attract each other becomes larger and larger, and the magnetic force becomes larger and larger. Thereby ensuring that the magnetic sensing part 220 rotates smoothly and accurately reflects the rotation of the turntable 10. In this case, the S pole and N pole of the magnetic part 110 on the turntable 10 can be arranged at will. The magnetic poles on the side facing the magnetic sensing part 220 of any two adjacent magnetic parts 110 in the circumferential direction can be the same or different.

[0070] The ferromagnetic material itself does not have magnetism and can be an iron part that can be adsorbed by the magnetic force of the magnetic part 110, thereby reducing parts and components and saving costs.

[0071] In a third specific embodiment, the magnetic sensing unit 220 includes a magnetic strip. Figure 7 and Figure 8As shown, the magnetic sensing part 220 is directly replaced by a magnetic strip, eliminating the fork 221 structure, reducing parts and components, and saving costs. In addition, since the magnetic poles at both ends of the magnetic strip are different, the magnetic poles on the side facing the magnetic sensing part 220 of any two adjacent magnetic parts 110 in the circumferential direction are also different. During the rotation of the turntable 10, when the magnetic part 110 approaches the magnetic strip, it will automatically allocate the NS poles of the magnetic strip for matching under the action of magnetic attraction. Although the two sides are not in contact, the turntable 10 will drive the magnetic sensing part 220 to rotate under the action of magnetic force, which is conducive to using the encoder to accurately identify the rotation speed and rotation direction.

[0072] In this case, the rotation centerline of the magnetic stripe can be distributed parallel to the rotation centerline of the turntable 10, or the rotation centerline of the magnetic stripe can be perpendicular to the surface of the turntable 10, so that it is closer to the magnetic component 110 and the magnetic sensing unit 220 rotates more smoothly.

[0073] The rotation speed sensors of some embodiments of the present invention are described in detail below.

[0074] Embodiment 1:

[0075] The strong magnetic sheets are evenly adsorbed on the brake disc as signal collection points of the speed sensor, and are evenly arranged along the circumference of the brake disc. The number can be freely selected according to the actual measurement accuracy, and mechanical speed sensors are arranged oppositely.

[0076] like Figure 1 and Figure 2 As shown, the speed sensor includes a magnetic sensing member 20 and a detection module 30, and the detection module 30 includes a first conductive part 310 and a second conductive part 320, and the first conductive part 310 is connected to the magnetic sensing member 20. The first conductive part 310 is a conductive spring, and the magnetic sensing member 20 is an iron contact arranged at one end of the conductive spring, and the second conductive part 320 includes a first conductive detection part 321 and a second conductive detection part 322, that is, a first conductive electrode plate and a second conductive electrode plate, and the conductive spring is located between the two conductive electrode plates, and an insulating member 40 is arranged at one end of the conductive spring located between the two conductive electrode plates and away from the iron contact.

[0077] The strong magnetic sheets are evenly arranged on the brake disc. When the brake disc rotates, the strong magnetic sheets will attract the iron contacts of the speed sensor when they are close to the speed sensor. The iron contacts are installed on the insulating block through conductive springs. Under the action of magnetic attraction, the iron contacts tilt in the direction of the strong magnetic sheets, driving the conductive springs to bend and deform. By selecting appropriate conductive spring materials, the tilt of the iron contacts can be controlled to ensure that the iron contacts can fully contact the pole plates on both sides under the action of magnetic attraction.

[0078] Specifically, when the iron contact tilts toward and contacts the first conductive electrode plate under the magnetic attraction of the strong magnetic sheet, the first conductive electrode plate and the conductive spring sheet are connected, generating an A signal. Similarly, when the iron contact tilts toward and contacts the second conductive electrode plate under the magnetic attraction of the strong magnetic sheet, the second conductive electrode plate and the conductive spring sheet are connected, generating a B signal. Generally, the direction of looking at the brake disc from the side of the speed sensor is defined as the positive direction. At this time, when the brake disc rotates counterclockwise, the generated signal pattern is as follows:

[0079] B→A→B→A→B.

[0080] The short arrow indicates a short time interval, and the long arrow indicates a long time interval. Therefore, by comparing the duration and the type of signal generated, the direction of rotation of the impeller can also be distinguished.

[0081] Specifically, when the brake disc rotates counterclockwise, when a magnetic part 110 approaches the iron contact, the iron contact tilts to the right side in the diagram under the action of the magnetic attraction force, and drives the conductive spring to bend and conduct with the second conductive electrode plate, generating a B signal. As the brake disc continues to rotate, when the magnetic part 110 moves between the two conductive electrode plates, the iron contact moves and resets with the magnetic part 110. As the brake disc continues to rotate, the iron contact tilts to the left side in the diagram under the action of the magnetic attraction force, and drives the conductive spring to bend and conduct with the first conductive electrode plate, generating an A signal. Since the brake disc rotates at a high speed, the transition from the B signal to the A signal is fast. As for when the B signal is generated next time, it may depend on the rotation speed of the brake disc and the spacing between the multiple magnetic parts 110.

[0082] In addition, in this embodiment, the rotation speed sensor is vertically arranged relative to the disc surface of the brake disc, and there is a gap between the rotation speed sensor and the brake disc, so that the two do not contact each other, and the magnetic sensing element 20 can move in the rotation direction of the brake disc. However, in other embodiments, the rotation speed sensor can also be arranged on the circumferential outer side of the brake disc and not contact the brake disc.

[0083] Embodiment 2:

[0084] Similar to the first embodiment, strong magnetic sheets are evenly adsorbed on the brake disc as signal collection points of the speed sensor, and are evenly arranged along the circumference of the brake disc. The number can be freely selected according to the actual measurement accuracy, and mechanical speed sensors are arranged oppositely.

[0085] like Figure 3 and Figure 4As shown, the speed sensor includes a magnetic sensing member 20 and a detection module 30, and the detection module 30 includes a first conductive part 310 and a second conductive part 320, and the first conductive part 310 is connected to the magnetic sensing member 20. The first conductive part 310 includes a first conductive rotating part 311 and a second conductive rotating part 312, namely a first conductive spring and a second conductive spring, and the magnetic sensing member 20 includes a first sensing part 201 connected to the first conductive rotating part 311 and a second sensing part 202 connected to the second conductive rotating part 312, namely a first iron contact and a second iron contact, which are respectively arranged at one end of a conductive spring. The second conductive part 320 includes a first conductive detection part 321 and a second conductive detection part 322, namely a first conductive electrode plate and a second conductive electrode plate. The first conductive electrode plate and the second conductive electrode plate are horizontally placed on one side of the brake disc and are spaced apart along the circumference of the brake disc, and the two conductive springs are distributed one by one on the side of the two conductive electrode plates away from the brake disc. An insulating block is arranged between each conductive spring sheet and the corresponding conductive electrode plate at one end away from the iron contact, or two conductive spring sheets and two conductive electrode plates share one insulating block.

[0086] The strong magnetic sheets are evenly arranged on the brake disc. During the rotation of the brake disc, when the strong magnetic sheets are close to the speed sensor, they will generate attraction to the iron contact of the speed sensor. The iron contact is installed on the insulating block through the conductive spring sheet. Under the action of the magnetic attraction, the iron contact tilts toward the strong magnetic sheet, driving the conductive spring sheet to bend and deform. By selecting a suitable conductive spring sheet material, the degree of inclination of the iron contact can be controlled to ensure that the iron contact can fully contact the corresponding conductive electrode plate under the action of the magnetic attraction. Here, the first iron contact and the second iron contact can conduct electricity, so that when the first iron contact contacts the first conductive electrode plate, the first conductive rotating part 311 and the first conductive electrode plate are connected. Similarly, when the second iron contact contacts the second conductive electrode plate, the second conductive rotating part 312 and the second conductive electrode plate are connected.

[0087] Generally, the direction of looking at the brake disc from the side of the speed sensor is defined as the positive direction. When the brake disc rotates counterclockwise, assuming that the second conductive electrode plate preferentially sweeps over the strong magnetic sheet, when the second iron contact tilts and contacts in the direction of the second conductive electrode plate under the magnetic attraction of the strong magnetic sheet, the second conductive electrode plate and the second conductive spring sheet are connected, generating a B signal. Similarly, when the first conductive electrode plate sweeps over the strong magnetic sheet, the first iron contact tilts and contacts in the direction of the first conductive electrode plate under the magnetic attraction of the strong magnetic sheet, and the first conductive electrode plate and the first conductive spring sheet are connected, generating an A signal. The generated signal pattern is as follows:

[0088] B→A→B→A→B.

[0089] The short arrow indicates a short time interval, and the long arrow indicates a long time interval, so by comparing the time length and the type of signal generated, the direction of rotation of the impeller can also be distinguished. The length of the time interval can depend on the rotation speed of the brake disc, the spacing between the multiple magnetic members 110, and the spacing between the two conductive plates.

[0090] Of course, when the strong magnetic sheet moves between the two conductive electrode plates, there is another situation that the two conductive springs are connected to the two conductive electrode plates at the same time. At this time, during the counterclockwise rotation of the turntable 10, the generated signal mode is as follows:

[0091] B→BA→A→B→BA→A.

[0092] Embodiment three:

[0093] Similar to the above-mentioned embodiment 1, a strong magnetic sheet is evenly adsorbed on the brake disc as a sensor signal collection point, the NS poles are arranged alternately and evenly along the circumference of the brake disc. The number can be freely selected according to the actual measurement accuracy, and the speed sensors are arranged oppositely.

[0094] like Figure 5 As shown, the speed sensor includes a magnetic sensing member 20 and a detection module 30, the detection module 30 includes an encoder, the magnetic sensing member 20 includes a rotating shaft 210 and a magnetic sensing portion 220, and the magnetic sensing portion 220 is connected to the encoder through the rotating shaft 210. The magnetic sensing portion 220 includes a plurality of shift forks 221 distributed along the circumference of the rotating shaft 210, and a magnetic strip is provided at the end of each shift fork 221.

[0095] The signal output part of the speed sensor can be a traditional speed sensor, encoder, and the key point is the rotational motion input mechanism. Figure 6 The strong magnetic sheets are evenly arranged on the brake disc. During the rotation of the brake disc, when the strong magnetic sheet approaches the magnetic strip on the fork 221, it will automatically allocate NS poles for matching under the action of magnetic attraction. Although the two sides are not in contact, the brake disc will drive the fork 221 to rotate under the action of magnetic force, so as to accurately identify the speed and rotation direction. In this embodiment, the NS poles of the magnetic strip installed on the fork 221 are arranged alternately, which can effectively avoid the problem of insensitive rotation transmission.

[0096] In addition, in this embodiment, multiple forks 221 are placed horizontally on one side of the brake disc, and the rotating shaft 210 is vertically distributed relative to the brake disc. The multiple forks 221 and the brake disc rotate clockwise or counterclockwise. The multiple forks 221 are close to the magnetic member 110, which is conducive to the smooth rotation of the magnetic sensing member 20. Of course, in other embodiments, the rotating shaft 210 can also be placed horizontally on the disc surface of the brake disc. In this case, it is necessary to avoid interference between the forks 221 and the brake disc, so that a certain gap is left between the two.

[0097] Embodiment 4:

[0098] Similar to the above-mentioned embodiment 3, a strong magnetic sheet is evenly adsorbed on the brake disc as a sensor signal collection point, the NS poles are arranged alternately and evenly along the circumference of the brake disc. The number can be freely selected according to the actual measurement accuracy, and the speed sensors are arranged oppositely.

[0099] like Figure 7 and Figure 8 As shown, the rotation speed sensor includes a magnetic sensing component 20 and a detection module 30 . The detection module 30 includes an encoder. The magnetic sensing component 20 includes a rotating shaft 210 and a magnetic strip. The magnetic strip is connected to the encoder through the rotating shaft 210 .

[0100] The signal output part of the speed sensor is a traditional speed sensor and encoder, and its key point is the rotational motion input mechanism. The strong magnetic sheets are evenly arranged on the brake disc, and the NS poles are arranged alternately. During the rotation of the brake disc, when the strong magnetic sheet approaches the magnetic strip, it will automatically allocate the NS poles for matching under the action of magnetic attraction. Although the two sides are not in contact, the brake disc will drive the magnetic strip to rotate under the action of magnetic force, so as to accurately identify the speed and rotation direction.

[0101] In this embodiment, the rotating shaft 210 is placed horizontally on the surface of the brake disc. In this case, it is necessary to avoid interference between the magnetic strip and the brake disc, so that a certain gap is left between the two. Of course, in other embodiments, the rotating shaft 210 can also be distributed vertically relative to the surface of the brake disc, and the magnetic strip is close to the magnetic element 110, which is conducive to the smooth rotation of the magnetic sensing element 20.

[0102] The second aspect of the present invention provides a wind turbine generator set, which includes a rotating disk 10 and a rotation speed sensor according to any of the above embodiments. The rotation speed sensor is used to detect the rotation speed of the rotating disk 10 .

[0103] The wind turbine generator set provided in the embodiment of this aspect has the rotation speed sensor of any of the above embodiments, and thus has the beneficial effects of the above embodiments, which will not be described in detail here.

[0104] Furthermore, the rotating disk 10 is connected to the impeller (not shown in the figure) and can rotate synchronously with the impeller. Thus, the speed sensor can detect the speed of the impeller. The rotating disk 10 can be a brake disk.

[0105] Of course, the rotating disk 10 may also be connected to other components of the wind turbine generator set, so as to detect the rotation speed and direction of the other components.

[0106] In addition, for detecting the rotation speed and direction of the same turntable 10, one of the above-mentioned rotation speed sensors may be used, or multiple of the above-mentioned rotation speed sensors may be used simultaneously, and they may be the same type of rotation speed sensors or different types of rotation speed sensors. Fig. 9 and Fig.10 The plurality of speed sensors can be distributed at different positions of the turntable 10 or on both sides of the axial direction of the turntable 10, so as to perform multi-point speed measurement on the turntable 10 with high accuracy.

[0107] Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It should be understood that, in the opinion of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention defined by the claims.

Claims

1. A rotation speed sensor for detecting the rotation speed of a turntable (10), wherein the turntable (10) is provided with a plurality of magnetic members (110), characterized in that: The speed sensor comprises: A magnetic sensing component (20) is movably arranged on one side of the rotating disk (10), and the magnetic sensing component (20) is used to move to a set position under the magnetic force of the magnetic component (110) within a sensing range during the rotation of the rotating disk (10); A detection module (30) is connected to the magnetic sensing component (20), and the detection module (30) is used to generate detection information for determining the rotation speed of the turntable (10) when the magnetic sensing component (20) moves to a set position.

2. The rotation speed sensor according to claim 1, characterized in that: The detection module (30) comprises a first conductive part (310) and a second conductive part (320), wherein the first conductive part (310) is connected to the magnetic induction component (20); When the first conductive part (310) moves to the set position along with the magnetic induction component (20), the first conductive part (310) and the second conductive part (320) are in direct or indirect contact with each other to be electrically connected, thereby generating the detection information.

3. The rotation speed sensor according to claim 2, characterized in that: The first conductive part (310) is connected to the insulating part (40), and the second conductive part (320) is connected to the insulating part (40); The second conductive part (320) includes a first conductive detection part (321) and a second conductive detection part (322); The first conductive part (310) can be respectively connected to the first conductive detection part (321) and the second conductive detection part (322) during the counterclockwise rotation and clockwise rotation of the turntable (10); or, the first conductive part (310) includes a first conductive rotating part (311) and a second conductive rotating part (312), the magnetic sensing component (20) includes a first sensing part (201) connected to the first conductive rotating part (311) and a second sensing part (202) connected to the second conductive rotating part (312), the first conductive rotating part (311) is connected to the first conductive detection part (321) during the counterclockwise rotation of the turntable (10), and the second conductive rotating part (312) is connected to the second conductive detection part (322) during the clockwise rotation of the turntable (10).

4. The rotation speed sensor according to claim 3, characterized in that: The magnetic induction component (20) has a magnetic adsorption force, and the magnetic poles of the multiple magnetic components (110) facing the side of the magnetic induction component (20) are the same; or, the magnetic induction component (20) does not have a magnetic adsorption force, and the magnetic poles of the multiple magnetic components (110) facing the side of the magnetic induction component (20) are the same or different; and / or The first conductive part (310) comprises an elastic conductive component; and / or, The second conductive part (320) includes a conductive electrode plate.

5. The rotation speed sensor according to claim 3, characterized in that: The magnetic induction component (20) is arranged at one end of the first conductive part (310), and the other end of the first conductive part (310) is connected to the second conductive part (320) via the insulating component (40).

6. The rotation speed sensor according to claim 1, characterized in that: The detection module (30) comprises an encoder, and the magnetic sensing component (20) comprises a rotating shaft (210) and a magnetic sensing portion (220), wherein the magnetic sensing portion (220) is connected to the encoder via the rotating shaft (210).

7. The rotation speed sensor according to claim 6, characterized in that: The magnetic force sensing part (220) comprises a plurality of shift forks (221) distributed along the circumference of the rotating shaft (210), and a magnetic sensing unit (222) is provided at the end of each shift fork (221); or, The magnetic force sensing portion (220) comprises a magnetic strip.

8. The rotation speed sensor according to claim 7, characterized in that: The magnetic sensing unit (222) is a magnetic strip, and any two adjacent magnetic sensing units (222) in the circumferential direction of the rotating shaft (210) have different magnetic poles at one end away from the rotating shaft (210), any two adjacent magnetic sensing units (222) in the circumferential direction of the rotating shaft (210) have different magnetic poles close to the rotating shaft (210), and any two adjacent magnetic members (110) in the circumferential direction have different magnetic poles on a side facing the rotation speed sensor.

9. The rotation speed sensor according to claim 6, characterized in that: The magnetic force sensing part (220) comprises a plurality of shift forks (221) distributed along the circumference of the rotating shaft (210); the shift forks (221) are made of ferromagnetic material; and the width of the shift forks (221) gradually decreases in a direction away from the rotating shaft (210); The magnetic poles of any two circumferentially adjacent magnetic members (110) on a side facing the magnetic force sensing portion (220) are the same or different.

10. A wind turbine generator set, characterized in that: The wind turbine generator set comprises: a rotating disk (10); and a rotation speed sensor according to any one of claims 1 to 9.

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