CN109742906A - A kind of magnetic coder and its installation method - Google Patents
A kind of magnetic coder and its installation method Download PDFInfo
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- CN109742906A CN109742906A CN201910071036.1A CN201910071036A CN109742906A CN 109742906 A CN109742906 A CN 109742906A CN 201910071036 A CN201910071036 A CN 201910071036A CN 109742906 A CN109742906 A CN 109742906A
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Abstract
The present invention relates to a kind of magnetic coders, comprising: shell；Permanent magnet is connect with every magnetic adapter；Every magnetic adapter, it is configured to the axis connection with Devices to test；And one or more fixed devices, it is configured to connect with Devices to test, so that the distance between shell and Devices to test are fixed.The invention further relates to a kind of methods for installing magnetic coder.By the invention it is possible to preferably substitute photoelectric encoder, to avoid the disadvantages mentioned above of photoelectric encoder, while can also compensate because of axis and end casing itself and/or axis movement bring tolerance, to keep the pinpoint accuracy of magnetic coder.
Description
Technical field
Present invention relates in general to automation control areas, in particular to a kind of magnetic coder.In addition, the present invention is also
It is related to a kind of method for installing magnetic coder.
Background technique
In recent years, clean energy resource field shows fast-developing trend.Clean energy resource is as a kind of new energy, with biography
System fossil fuel, which is compared, has many advantages, such as that widely distributed, renewable, environmental pollution is small.As the representative of clean energy resource, wind-force hair
Motor using growing.
An important ring for the automation control of wind-driven generator is measurement operation state of generator, such as the mechanical position of rotor
It sets.For this purpose, generally use photoelectric encoder, wherein photoelectric encoder be it is a kind of by photoelectric conversion by the machinery of output shaft
Geometric displacement amount is converted into the sensor of pulse or digital quantity.However, the precise grating that photoelectric encoder uses is not only at high cost,
And it is easy to damage due to Generator Vibration and impact, and the bearing of photoelectric encoder is vulnerable due to meeting with stresses.This
Outside, the measurement of photoelectric encoder is higher to purity requirements, so if seal failure, then invade the intracorporal greasy dirt of shell, moisture
And water will also result in photoelectric encoder failure.In addition, existing photoelectric encoder adds the mounting structure of toggle using rolling bearing,
Not only constructions cost is high, but also accuracy decline is easy to appear after long-play, or even encoder failure occur.
Summary of the invention
From the prior art, the task of the present invention is a kind of magnetic coder and its installation method is provided, compiled by the magnetic
Code device and/or the installation method, can preferably substitute photoelectric encoder, to avoid the disadvantages mentioned above of photoelectric encoder, together
When can also solve the problems, such as batch production in because between the axis and end casing of motor tolerance it is big and uncertain, keep magnetic coder
Pinpoint accuracy and robustness.
In the first aspect of the present invention, which is solved by a kind of magnetic coder, which includes:
Shell；
Permanent magnet is connect with every magnetic adapter；
Every magnetic adapter, it is configured to the axis connection with Devices to test；And
The fixed devices of one or more, are configured to connect with Devices to test so that shell and Devices to test it
Between distance fix.
The present invention is based on seeing clearly as follows for inventor: inventor has found that the accuracy of existing photoelectric encoder
It reduces and its is the main reason for failure: (a) since running environment is poor, encoder seal failure, vulnerable to pollution object, dust, water
It corrodes；(b) it is directly connected to due to encoder by bearing and axis, bearing and grating are vulnerable to vibration and impact failure；(c) more important
Be due to axis manufacturing tolerance and operational process axis circle run-out tolerance variation；By using the magnetic of magnetic field detection principle
Encoder realizes bearing-free and directly contact, electric insulation and isolation, improves reliability and durability.Because not using axis
It holds by increasing axially adjustable and fixed device, the position to axial between magnetic coder and axis can be remained solid
It is fixed, system of the batch production axis between end casing itself is compensated by adjusting the axial distance via the fixed device
Make tolerance；It is positioned in addition, being cooperated with the seam allowance of sleeve bushing and axis, volume can also be adjusted in conjunction with being used cooperatively for multiple fixed devices
Face (1 points can determine a face) where code device, to carry out centering or registration to magnetic coder.
It being provided in a preferred embodiment of the invention, one or more of fixed devices include multiple fixed devices,
Wherein the fixed device is additionally configured to that the distance between shell and Devices to test can be adjusted, and allows shell is opposite
Centering is carried out in the axis.By the preferred embodiment, the adjustable structure using axis as shell initial alignment benchmark is realized,
It can not only adjust and keep the distance between shell and Devices to test, moreover it is possible to by adjusting shell in the multiple fixed device
Face locating for shell is arranged with Devices to test distance in place, thus by shell relative to the axis carry out centering, registration,
The operations such as distance adjusting.
It provides in another preferred embodiment of the invention, the multiple fixed device includes 3 fixed devices.Due to 3
Point determines the principle in a face, therefore by the preferred embodiment, shell preferably can be arranged by adjusting 3 fixed devices
Locating face, to preferably carry out centering.It should be noted here that according to different application scene, the fixation device of other numbers
It is also conceivable.
It is provided in another preferred embodiment of the invention, each of one or more of fixed devices include:
Bolt, can pass through shell at least part and Devices to test end casing, so as to by shell with it is to be measured
Equipment connection；And
3 nuts, including the first nut, the second nut and third nut, wherein the first nut is configured to spiral shell
Bolt is fixed relative to shell, and second and third nut be configured to fix bolt relative to the end casing.
By the preferred embodiment, the fixation device and simple mounting means of low cost may be implemented, but also can be with
The distance between shell and Devices to test are precisely adjusted by screw on nut.It should be noted here that in the teachings of the present invention
Under, it is also contemplated that the fixation device of other forms, such as connecting screw, connection sheet, the locking connection with protrusion etc..
It provides in another preferred embodiment of the invention, the Devices to test is wind-driven generator.By the way that the magnetic is compiled
Code device is used for the rotor position measurement of wind turbine power generation machine, can reduce the cost of magnetic coder, such as constructions cost, installation cost and
Maintenance cost.
In the second aspect of the present invention, foregoing task is solved by a kind of for installing the method for magnetic coder, the party
Method includes the following steps:
Permanent magnet is connect with every magnetic adapter；
It will be every the axis connection of magnetic adapter and Devices to test；
Shell is installed；And
Shell is connect with Devices to test using one or more fixed devices so that between shell and Devices to test away from
From fixation.
It being provided in a preferred embodiment of the invention, one or more of fixed devices include multiple fixed devices,
This method further include:
The distance between shell and Devices to test are adjusted by operating the fixed device, is allow shell is opposite
Centering is carried out in the axis.
By the preferred embodiment, it can not only adjust and keep the distance between shell and Devices to test, moreover it is possible to pass through tune
Face locating for shell is arranged with Devices to test distance at the multiple fixed device in whole shell, thus by shell phase
The operation such as centering, registration is carried out for the axis.
It provides in another preferred embodiment of the invention, the multiple fixed device includes 3 fixed devices, wherein passing through
The fixed device, which is operated, to adjust the distance between shell and Devices to test includes:
Determine the plane that shell or permanent magnet should be at；
According to the plane determine shell at described 3 fixed devices respectively should with Devices to test apart it is specified away from
From；And
Respectively using described 3 fixed devices by shell at described 3 fixed devices between Devices to test at a distance from
It is adjusted to the nominal distance.
It, can be preferably solid by adjusting 3 by the preferred embodiment since 3 points determine the principle in a face
Device is determined face locating for shell is arranged, to preferably carry out centering.It should be noted here that according to different application scene,
The fixation device of its number be also it is conceivable, such as using 2 or 4 fixed devices.
Provided in another preferred embodiment of the invention, each of one or more of fixed devices include bolt and
3 nuts, wherein including: by operating the fixed device to adjust the distance between shell and Devices to test
Bolt is passed through at least part of shell and the end casing of Devices to test；
Bolt is fixed relative to shell using the first nut；And
Bolt is fixed relative to the end casing using second and third nut.
By the preferred embodiment, the fixation device and simple mounting means of low cost may be implemented, but also can be with
The distance between shell and Devices to test are precisely adjusted by screw on nut.It should be noted here that in the teachings of the present invention
Under, it is also contemplated that the fixation device of other forms, such as connecting screw, connection sheet, the clamping lock with protrusion (such as flange) connect
Fitting etc..
It provides in another preferred embodiment of the invention, the Devices to test is wind-driven generator.By the way that the magnetic is compiled
Code device is used for the rotor position measurement of wind turbine power generation machine, can reduce the cost of magnetic coder, such as constructions cost, installation cost and
Maintenance cost.It should be noted here that the invention is not limited thereto, but it can be used for other Devices to test, such as turbine, direct current
Or alternating current generator etc..
The present invention at least has the following beneficial effects: that (1) magnetic coder of the invention can be answered instead of photoelectric encoder
For various Devices to test, especially wind-driven generator, high constructions cost, installation cost and the dimension of photoelectric encoder are thus avoided
Protect cost；(2) in addition, by the invention it is possible to keeping the fixed range between the shell of magnetic coder and Devices to test, i.e. axis
To distance, measurement error caused by the abrasion of foozle or axis or motor operation because of axis itself with end casing, phase are thus avoided
Instead, by the invention it is possible to which the distance between the shell of magnetic coder and Devices to test are maintained at fixed desired value；
(3) in addition, through the invention, centering will can also be carried out for Devices to test to magnetic coder simple, at low cost, and keep
The state of the registration, to further increase measurement accuracy.
Detailed description of the invention
With reference to specific embodiment, the present invention is further explained with reference to the accompanying drawing.
Fig. 1 shows the sectional view of magnetic coder according to the present invention；
Fig. 2 shows the dorsal views for the Devices to test for being equipped with magnetic coder according to the present invention；And
Fig. 3 shows according to the present invention for installing the method flow of magnetic coder.
Specific embodiment
It should be pointed out that each component in each attached drawing may be shown in which be exaggerated in order to illustrate, and it is not necessarily ratio
Example is correctly.In the drawings, identical appended drawing reference is equipped with to the identical component of identical or function.
In the present invention, unless otherwise indicated, " on being arranged in ... ", " being arranged in ... top " and " on being arranged in ... "
Do not exclude the case where there are intermediaries therebetween.In addition, being merely representative of " above being arranged in ... " between two components
Relative positional relationship, and in any case, such as after the reverse line of production, can also be converted to " be arranged in ... it is lower or under
Side ", vice versa.
In the present invention, each embodiment is intended only to illustrate the solution of the present invention, and is understood not to restrictive.
In the present invention, unless otherwise indicated, quantifier "one", " one " and the scene for not excluding element.
It is also noted herein that in an embodiment of the present invention, for it is clear, for the sake of simplicity, might show only one
Sub-unit or component, but those skilled in the art are it is understood that under the teachings of the present invention, it can be according to concrete scene
Need to add required component or component.
It is also noted herein that within the scope of the invention, the wording such as " identical ", " equal ", " being equal to " are not meant to
The two numerical value is absolutely equal, but allows certain reasonable error, that is to say, that the wording also contemplated " substantially phase
Together ", " being essentially equal ", " being substantially equal to ".
In addition, the number of the step of each method of the invention limit the method step execute sequence.Unless special
It does not point out, various method steps can be executed with different order.
The present invention is based on seeing clearly as follows for inventor: inventor has found that the accuracy of existing photoelectric encoder
It reduces and its is the main reason for failure: (a) since running environment is poor, encoder seal failure, vulnerable to pollution object, dust, water
It corrodes；(b) it is directly connected to due to encoder by bearing and axis, bearing and grating are vulnerable to vibration and impact failure；(c) more important
Be due to axis manufacturing tolerance and operational process axis circle run-out tolerance variation；By using the magnetic of magnetic field detection principle
Encoder realizes bearing-free and directly contact, electric insulation and isolation, improves reliability and durability.Because not using axis
It holds by increasing axially adjustable and fixed device, the position to axial between magnetic coder and axis can be remained solid
It is fixed, system of the batch production axis between end casing itself is compensated by adjusting the axial distance via the fixed device
Make tolerance；It is positioned in addition, being cooperated with the seam allowance of sleeve bushing and axis, volume can also be adjusted in conjunction with being used cooperatively for multiple fixed devices
Face (1 points can determine a face) where code device, to carry out centering or registration to magnetic coder.
The present invention is illustrated below according to specific embodiment.
Fig. 1 shows the sectional view of magnetic coder 100 according to the present invention.
As shown in Figure 1, magnetic coder 100 is fitted including shell 101 and the permanent magnet 102 being arranged in shell 101, every magnetic
Orchestration 103 and fixed device, wherein permanent magnet 102 connect or engages with every magnetic adapter 103, and every magnetic adapter 103
It is connected to the axis 106 of Devices to test 105.It is configured as between isolation permanent magnet and 105 side of Devices to test every magnetic adapter 103
Magnetic field, so that it is disturbed to prevent magnetic field of permanent magnet, to influence the mechanical location measurement of the axis 106 of Devices to test 105.It is suitable every magnetic
The shape of orchestration 103 is, for example, bolt arrangement, and is made of non-magnetic material (such as copper, aluminium), and there is screw thread in tail portion.It is adapted to every magnetic
Device 103 can for example screw in the centre bore of axis 106 and tighten to complete permanent magnet fixed installation.The wind-driven generator the case where
Under, the magnetic field of the main field of generator and the permanent magnet of installation can be isolated every magnetic adapter 103.In order to further decrease shadow
It rings, magnetic coder can also be arranged in the distalmost end of generator primary magnetic field with the main field far from generator.Devices to test
105 are also possible to other machinery equipment.In the case where wind-driven generator, axis 106 is, for example, to rotate outside Generator Slip Ring case
Small axis.The main body of shell 101 for example can be connected or be contacted with Devices to test 105 by sleeve bushing 104, wherein for example by moulding
Sleeve bushing 104 made of expecting can carry out radial positioning to entire magnetic coder 100, thus meet the radial high-precision of encoder
It is required that.Sleeve bushing 104 plays the role of initial alignment, and after the shell of magnetic coder 100 101 is completed to fix, is sending out
It may also function as the effect of protection axis 106 and shell 101 in motor operation course, and running a small amount of abrasion will not influence magnetic volume
The use and performance of code 100.In other embodiments, shell 101 can also directly be connect with Devices to test 105.
In the present embodiment, fixed device is illustrated as threaded connector comprising bolt 107 and 3 nut, i.e. first,
Second and third nut 108-110.It should be noted here that under the teachings of the present invention, it is also contemplated that the fixation of other forms
Device, such as connecting screw, connection sheet, the locking connection with protrusion (such as flange).In Fig. 1, bolt 107 is passed through
A part of shell 101 and the end casing 201 for passing through Devices to test 105, so that shell to be connect with Devices to test.In order to solid
It is fixed, provided with 3 nuts cooperated with bolt 107, including the first nut 108, the second nut 109 and third nut 110, wherein
First nut 108 is arranged in the surface of shell 101 so that bolt 107 is fixed relative to shell 101, and second and third nut
109,110 the two sides of end casing 201 are arranged in so that bolt 107 is fixed relative to the end casing 201, that is to say, that the
One nut 108 mainly plays fixed function to magnetic coder 100, and second and 109,110, third nut can be to magnetic coder 100
The axial position of (or its shell 101) is adjusted, and thus meets the tolerance of mounting surface.Since nut 108-110 can be with
Change fixed position on bolt 107, therefore pass through the fixation position of adjusting nut 108-110, adjustable shell 101 is opposite
Axial distance between Devices to test 105 or its axis 106, to compensate the manufacturing tolerance or axis 106 and end casing of axis 106
201 displacement, and then guarantee the accuracy of magnetic coder 100.Its reason is, for example, by keeping the axial distance, permanent magnetism
Body 102 is remained unchanged in the intracorporal air gap of shell, therefore is provided more stable and accurate position during axis 106 rotates and measured.
The operational process of magnetic coder 100 is described below.When generator is run, permanent magnet 102 and axis 106 rotate together,
Detected changes of magnetic field is converted to the information of position by the sensor chip of the sensor circuit board in shell 101, is passed through
The output of differential driving signal form is finally realized in signal conversion processes and shaping, is passed with meeting long cable drive long range signals
Defeated requirement.Magnetic coder 100 can be arranged in the distalmost end of generator main field, to reduce generator field to magnetic coder
Magnetic disturbance a possibility that.The principle that encoder 100 measures mechanical location is well known in the prior art, therefore in order not to fuzzy
The present invention is not further spread out explanation herein.
In addition, can also arrange multiple fixed devices although the fixed device of only one is shown in FIG. 1.?
In the case where arranging multiple, such as 3 or more fixed devices, shell 101 can be adjusted separately by the fixed device and existed
Face locating for shell is set with the distance between Devices to test 105 at each fixed device, thus by shell relative to described
Axis carries out the operation such as centering, registration.It, can be more steadily solid by adjusting 3 since 3 points determine the principle in a face
Device is determined face locating for shell is arranged, to preferably carry out centering or registration.
Fig. 2 shows the dorsal views for the Devices to test 105 for being equipped with magnetic coder 100 according to the present invention.
From figure 2 it can be seen that the axis 106 of Devices to test 105 passes through the end cap of the Generator Slip Ring case of Devices to test 105
Plate 201, and it is free to rotate.Since entire slip ring cabinet is that sheet metal component and weldment form, thus axial tolerance it is very big and
Uncertain (such as: in ± 5mm or so), and magnetic coder requires standard to the distance between sensor chip on permanent magnet and circuit board
Really and tolerance is smaller (such as: 1mm ± 0.5mm), and radial alignment size also has strict requirements.So magnetic coder simply closes
The mounting means of reason is a very big challenge.However equipped with magnetic coder 100 of the invention, can effectively it mend
The manufacturing tolerance for repaying the axial displacement and axis 106 between axis 106 and end casing 201, makes tolerance meet above-mentioned requirements, to protect
Demonstrate,prove the accuracy of magnetic coder 100.
The present invention at least has the following beneficial effects: that (1) magnetic coder of the invention can be answered instead of photoelectric encoder
For various Devices to test, especially wind-driven generator, high constructions cost, installation cost and the dimension of photoelectric encoder are thus avoided
Protect cost；(2) in addition, by the invention it is possible to keeping the fixed range between the shell of magnetic coder and Devices to test, i.e. axis
To distance, measurement error caused by the abrasion of foozle or axis or motor operation because of axis itself with end casing, phase are thus avoided
Instead, by the invention it is possible to which the distance between the shell of magnetic coder and Devices to test are maintained at fixed desired value；
(3) in addition, through the invention, centering will can also be carried out for Devices to test to magnetic coder simple, at low cost, and keep
The state of the registration, to further increase measurement accuracy.
Fig. 3 shows the method flow 300 according to the present invention for being used to install magnetic coder, and wherein dotted line frame indicates optional
Step.
In step 302, permanent magnet is connect with every magnetic adapter.
It, will be every the axis connection of magnetic adapter and Devices to test in step 304.In the present invention, that, unless otherwise stated, term
" connection " may include various mechanical connection manners, such as weld, rivet, being threadedly coupled, being bonded, snapping connection, clamping lock connection, connect
Close etc..
In step 305, shell is installed.Such as the main body and Devices to test of shell can be connected by sleeve bushing.
In step 306, shell is connect with Devices to test using one or more fixed device, so that shell is set with to be measured
It is the distance between standby fixed.Here, shell and Devices to test can be adjusted by operating fixed device before final regulation
Between (axial direction) distance.
In optional step 308, the plane that shell or permanent magnet should be at is determined.This for example can be according to registration or centering
It is required that determine.
In optional step 310, determine that shell respectively should at the multiple (such as 3) fixed device according to the plane
With the nominal distance of Devices to test apart.This can for example be determined by accordingly measuring and carrying out mathematical computations.Using axis
In the case where set, the stationary plane can be determined by the face of axle sleeve, and by the shape matching relationship of the seam allowance of axle sleeve and axis
To determine axial distance.
In optional step 312, respectively using the multiple fixed device by shell at the multiple fixed device with to
The distance between measurement equipment is adjusted to the nominal distance.In the case where threaded connector, multiple nuts are adjusted separately in spiral shell
Position on bolt come adjust shell at the threaded connector with Devices to test distance.Using axle sleeve,
To make encoder in the stationary plane determined by the face of axle sleeve and make encoder in each fixed dress by adjusting the fixed device
The place of setting and shell or axis are in the axial distance determined by axle sleeve.
The present invention have following features: it is at low cost, original photoelectric encoder can be substituted well and reduce cost 70~
90%.；Simple and convenient, bearing-free and directly contact, realization electric insulation isolation are installed；Tolerance pollutant, dust-proof, water, reliably
Property and durability it is high, circuit integration is small in size；Devise adjustable mounting structure using axis as shell initial alignment benchmark
Solve that tolerance between generator shaft and end casing is larger and uncertain problem；Permanent magnet and encoder housing positioning rely on
Machining surface positioning guarantees higher precision, i.e. the permanent magnet positioning geometric tolerances high using axis center hole position assurance,
Encoder housing can guarantee high geometric tolerances and axial-radial positioning using the positioning of axis seam allowance；Difference output long distance driver electricity
Road has the long cable transmission ability of driving signal.
Although some embodiments of the present invention are described in present specification, those skilled in the art
Member is it is understood that these embodiments are merely possible to shown in example.Those skilled in the art under the teachings of the present invention may be used
To expect numerous variant schemes, alternative solution and improvement project without beyond the scope of this invention.The appended claims purport
It is limiting the scope of the invention, and is covering the method in the range of these claims itself and its equivalents and knot whereby
Structure.
Claims (10)
1. a kind of magnetic coder, comprising:
Shell；
Permanent magnet is connect with every magnetic adapter；
Every magnetic adapter, it is configured to the axis connection with Devices to test；And
The fixed device of one or more, is configured to connect with Devices to test, so that between shell and Devices to test
Distance is fixed.
2. magnetic coder according to claim 1, wherein one or more of fixed devices include multiple fixed devices,
Wherein the fixed device is additionally configured to that the distance between shell and Devices to test can be adjusted, and allows shell is opposite
Centering is carried out in the axis.
3. magnetic coder according to claim 3, wherein the multiple fixed device includes 3 fixed devices.
4. magnetic coder according to claim 1, wherein each of one or more of fixed devices include:
Bolt can pass through at least part of shell and the end casing of Devices to test, so as to by shell and Devices to test
Connection；And
3 nuts, including the first nut, the second nut and third nut, wherein the first nut is configured to bolt phase
Shell is fixed, and second and third nut be configured to fix bolt relative to the end casing.
5. magnetic coder according to claim 1, wherein the Devices to test is wind-driven generator.
6. a kind of method for installing magnetic coder, including the following steps:
Permanent magnet is connect with every magnetic adapter；
It will be every the axis connection of magnetic adapter and Devices to test；
Shell is installed；And
Shell is connect with Devices to test using one or more fixed device, so that the distance between shell and Devices to test are solid
It is fixed.
7. according to the method described in claim 6, wherein one or more of fixed devices include multiple fixed devices, the party
Method further include:
The distance between shell and Devices to test are adjusted by operating the fixed device, is made it possible to shell relative to institute
It states axis and carries out centering.
8. according to the method described in claim 7, wherein the multiple fixed device includes 3 fixed devices, wherein passing through behaviour
Making the fixed device to adjust the distance between shell and Devices to test includes:
Determine the plane that shell or permanent magnet should be at；
Determine that shell respectively should be with the nominal distance of Devices to test apart at described 3 fixed devices according to the plane；
And
Respectively using described 3 fixed devices by shell at described 3 fixed devices between Devices to test at a distance from adjustment
To the nominal distance.
9. according to the method described in claim 6, wherein each of one or more of fixed devices include bolt and 3
Nut, wherein including: by operating the fixed device to adjust the distance between shell and Devices to test
Bolt is passed through at least part of shell and the end casing of Devices to test；
Bolt is fixed relative to shell using the first nut；And
Bolt is fixed relative to the end casing using second and third nut.
10. according to the method described in claim 6, wherein the Devices to test is wind-driven generator.
Priority Applications (1)
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|---|---|---|---|
| CN201910071036.1A CN109742906B (en) | 2019-01-25 | 2019-01-25 | Magnetic encoder and installation method thereof |
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|---|---|---|---|
| CN201910071036.1A CN109742906B (en) | 2019-01-25 | 2019-01-25 | Magnetic encoder and installation method thereof |
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| CN109742906B CN109742906B (en) | 2020-08-14 |
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Cited By (1)
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| CN114123668A (en) * | 2020-08-31 | 2022-03-01 | 广东美的智能科技有限公司 | Encoder rotor, servo motor, machine tool, rotor mounting tool and assembling method |
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| CN114123668A (en) * | 2020-08-31 | 2022-03-01 | 广东美的智能科技有限公司 | Encoder rotor, servo motor, machine tool, rotor mounting tool and assembling method |
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