CN1576864A - Insulation resistance tester for insulation bearing and detecting method - Google Patents
Insulation resistance tester for insulation bearing and detecting method Download PDFInfo
- Publication number
- CN1576864A CN1576864A CN 03146173 CN03146173A CN1576864A CN 1576864 A CN1576864 A CN 1576864A CN 03146173 CN03146173 CN 03146173 CN 03146173 A CN03146173 A CN 03146173A CN 1576864 A CN1576864 A CN 1576864A
- Authority
- CN
- China
- Prior art keywords
- surface film
- insulation
- bearing
- mentioned
- outer ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
Provided is a fixture and a method capable of obtaining a sufficient contact ratio between an insulating film of the outer ring of an insulated bearing and each film touching object to be brought into contact with it, and capable of measuring the insulation resistance value of the insulated bearing precisely, and to prevent the insulating film of the outer ring and the film touching objects from being worn, when the insulated bearing is fitted into the jig. Film touching objects 4, 5 which touch the insulating film 32a of the outer ring 32 of the insulated bearing 30, and are connected to an ohm-meter 6 are provided. These touching objects 4, 5 are made of a conductive polymer such as conductive rubber or the like. The touching objects 4, 5 are fitted to the inside surfaces of the jig body 2 and a lid member 3. The jig body 2 is in the shape of a split-into-two ring.
Description
Technical field
The present invention relates to measure the insulation resistance tester tool and the assay method of the insulation resistance of employed insulation bearings such as rolling stock main motor, generator, general-purpose motor.
Background technology
As motor etc.,,, adopt with insulating surface film and cover the outer diametric plane of bearing outer ring and the insulation bearing of breadth in order to prevent galvanic corrosion for the bearing that is used between shell and axle, producing the position of bigger potential difference (PD).Insulating surface film adopts materials such as resin, pottery.As this insulation bearing, has the type that on the skin of insulating surface film, forms metal film.Occasion in the insulating property of measuring such insulation bearing with metal film, be connected with the bearing outer ring mother metal with the outermost metal level of line terminal and bearing outer ring by ground terminal the resistance instrument, can measure the insulating resistance value in the whole zone of dielectric film of bearing outer ring with outermost metal level as electrode.
On the other hand, in the insulation bearing that expose on the surface, be merely able to only make terminal to contact, measure the insulating resistance value of the part of insulating surface film with the part of insulating surface film at insulating surface film.In order to measure all insulating resistance values, this utensil adopts Fig. 8, and is shown in Figure 9, and the shell 42 that contacts with the outer diametric plane of bearing outer ring, and the cover 43 that contacts with breadth must be measured at the state that is assemblied in wherein.In the past, in order to measure easily, shell 42 is two component types, by the position of bolted in 180 °, can be from the side, and mounting cover parts 43.Two terminals of resistance instrument 6 are connected with bearing outer ring mother metal 32b with shell 42.If adopt such mensuration utensil, then need not operation that bearing discrete item 30 opposite shell 42 are pressed into, extract out, can only by manual working, measure insulating resistance value not adopting under the situation that adds press etc.In addition, Fig. 8 (A) is for to be equivalent to along the cut-open view of the cut-open view of the VIII-VIII line among Fig. 8 (B).
Summary of the invention
Be the occasion of insulation bearing of single layer structure of the pottery of thermospraying equally, adopt Fig. 8 at insulating surface film, the mensuration utensil that Fig. 9 is such, but in this occasion, have following such problem.In occasion as insulation bearing, mode by attrition process, with standard size, roughness finishing is carried out on the surface of insulating surface film 32a, but, even carrying out under the situation of accurately machined state with standard size, roughness, when passing through the shell 42 of the two component types of bolted, the contact site of face and insulating surface film 32a in the enclosure, produce small slip, still, compare with the metal material of shell 42, the hardness of the insulating surface film 32a of ceramic is higher, thus, present the phenomenon that abrasion take place shell 42, though this wear intensity is small.Because these abrasion, the internal diameter size of shell 42 changes because of using repeatedly, if do not keep the magnitude of interference with insulating surface film 32a, then produces loose contact, can not measure correct insulating resistance value.In addition, because the abrasion powder is attached on the surface of insulating surface film with trace, clean the very problem of spended time so also have it.For the installation of cover 43,, then produce the phenomenon identical equally with the occasion of shell 42 if do not carry out careful terminal operation.In addition, enumerated the problem the when surface of insulating surface film 32a carried out attrition process in the above, still, in fact,, just carried out the situation that insulation resistance is checked even have state before attrition process.This inspection refers to before attrition process, whether confirm because of just in case reason such as thermospraying is bad, cause the situation of defective insulation, implement according to the mode of defective products not being carried out attrition process, still, have following problems, promptly, the surface of not carrying out the insulating surface film 32a of attrition process is generally uneven surface, and the contact rate of shell 42 and insulating surface film 32a is lower, can't carry out the good mensuration of precision.
In addition, by the film formed occasion of resin, in the occasion that adopts above-mentioned utensil to measure, even under the situation that produces above-mentioned slip, the two does not still produce abrasion shell 42 and insulating surface film 32a at the insulating surface film 32a of bearing outer ring.Its reason is that insulating surface film 32a is formed by resin, because of having elasticity, can follow small slip and changes.
The object of the present invention is to provide the insulating surface film that obtains bearing outer ring,, can correctly measure the mensuration utensil and the insulation resistance values determination method of the insulating resistance value of insulation bearing with the good contact rate of the surface film contact that contacts with it.
The insulation resistance tester tool of insulation bearing of the present invention is determined at the insulating resistance value of the insulation bearing that has insulating surface film on the bearing outer ring, it is characterized in that the surface film contact is formed by electroconductive polymer, this surface film contact contacts with the insulating surface film of the bearing outer ring of above-mentioned insulation bearing, is connected with the resistance instrument.Above-mentioned electroconductive polymer is materials such as conducting rubber, or Markite.
If employing such scheme, because the surface film contact forms by electroconductive polymer, thus the surface film contact because of its elastic deformation, easily and the jog that causes of the surfaceness of insulating surface film identical, do not contact partly, obtain good contact rate with jog.Thus, carry out the mensuration of correct insulating resistance value.Be ceramic fused spray coating particularly at insulating surface film, be in the occasion of state on the surface of thermospraying, if compare with the attrition process face, be generally uneven surface, the surface film contact is a metal material, contact rate is lower, be difficult to measure, even but under the situation of the insulating surface film that forms by so ceramic fused spray coating relatively, if adopt the surface film contact of electroconductive polymer, still obtain higher contact rate, carry out the mensuration of precision good insulation performance resistance value.In addition, because elastic deformation can take place the surface film contact,, still, prevent abrasion by elastic deformation takes place so, produce under the situation of some slips even when pressing on the surface film contact on the insulating surface film.
For the surface film contact, in electroconductive polymer, elasticity good electrical conductivity rubber jog easy and insulating surface film coincide, so preferably adopt this material, but, even under the situation of Markite, owing to have certain elasticity, so with the surface film contact is that the occasion of metal material is compared, contact is improved.
In the present invention, the insulation resistance tester tool also can be following form, that is, it comprises the appliance body of the ring-type that is divided into 2 parts, the interior week of this appliance body and the bearing outer ring of insulation bearing are chimeric, and this appliance body has a flange part that breadth is faced with above-mentioned bearing outer ring; Cover, this cover is installed on this appliance body in mode removably, faces with another breadth in the above-mentioned appliance body; The surface film contact, this surface film contact is arranged at the inner peripheral surface of above-mentioned appliance body and the inner face of flange part, and the inner face of above-mentioned cover, contacts with the insulating surface film of above-mentioned bearing outer ring, is connected with above-mentioned resistance instrument.
In the occasion of this scheme, can make the surface film contact, with outer diametric plane, arrive the basic whole contact of the insulating surface film of breadth from bearing outer ring, carry out the higher mensuration of precision.In addition, because appliance body is the ring-type that is divided into two parts, so make insulation bearing this utensil turnover relatively easily.In the occasion that adopts such appliance body that is divided into 2 parts, when the appliance body of both sides is mutual when fastening, between the inner face of insulating surface film surface and appliance body, produce small slip, but, this small slip relatively, the surface film contact is an electroconductive polymer, thus, it can change because of its elasticity.Thus, this utensil and insulating surface film all do not produce abrasion, can measure insulating resistance value.
In the present invention, above-mentioned surface film contact also can be following type, promptly, its appliance body and cover by the ring-type that is divided into 2 parts constitutes, the interior week of this appliance body and the bearing outer ring of insulation bearing are chimeric, and this appliance body have with above-mentioned bearing outer ring in a flange part that breadth contacts, this cover is installed on the above-mentioned appliance body in mode removably, contacts with another breadth in the above-mentioned bearing outer ring.
In the occasion of this scheme, owing to appliance body is made of the surface film contact, thus compare with the occasion on the appliance body that the surface film contact is installed on discrete item, simple in structure.Equally in the occasion of this scheme, can make surface film contact and outer diametric plane from bearing outer ring, to the basic whole contact of the insulating surface film of the scope of breadth, carry out high-precision mensuration.In addition, because appliance body is the ring-type that is divided into 2 parts, so the easy relative determination utensil turnover of insulation bearing.When the appliance body of the both sides that will be divided into 2 parts mutual when fastening, same as described above, between the inner face of insulating surface film surface and appliance body, produce small slip, but, the surface film contact that constitutes appliance body is an electroconductive polymer, and it can be followed this small slip because of elasticity and change.Thus, can all not produce under the situation of abrasion, measure insulating resistance value at utensil and dielectric film surface film.
In the present invention, above-mentioned surface film contact also can be the parts of the ring-type that contacts with the breadth of bearing outer ring in the above-mentioned insulation bearing.
Occasion in this scheme, only measure according to making the surface film contact with the mode that the insulating surface film of the breadth of bearing outer ring contacts, but, the surface film contact is because of elastic deformation, coincide with the jog on the surface of insulating surface film, obtains higher contact rate, in addition, in complete all scopes, realize contact, thus, precision determination insulating resistance value that can be good.In addition, owing to be the insulation resistance tester tool that the discrete item by the surface film contact of ring-type forms, so structure is very simple.
In the present invention, above-mentioned surface film contact also can be the parts that are covered in the ring-type on the outer diametric plane of the bearing outer ring in the above-mentioned insulation bearing with elastic type.
Occasion in this scheme, only measure according to making the surface film contact with the mode that the insulating surface film of the outer diametric plane of bearing outer ring contacts, but, the surface film contact is because of elastic deformation, coincide with the jog on the surface of insulating surface film, obtains higher contact rate, in addition, in complete all scopes, realize contact, thus, precision determination insulating resistance value that can be good.Be covered in the insulation resistance tester tool that the discrete item of the surface film contact of the ring-type on the outer diametric plane of bearing outer ring forms owing to serve as reasons in flexible mode, so equally in this occasion, structure is very simple.
In the present invention, this mensuration utensil also can be following form, promptly, it is made of appliance body and membranaceous surface film contact, this appliance body has the enterable recess of a part of the circumferencial direction of the bearing outer ring in the above-mentioned insulation bearing, this surface film contact extends with the opening part of planar fashion at the recess of above-mentioned appliance body, contacts with above-mentioned bearing outer ring.
In the occasion of this scheme, by bearing outer ring being pressed on the surface film contact that extends along the plane, elastic deformation takes place along the outer diametric plane of bearing outer ring in the surface film contact, contacts with the insulating surface film of the outer diametric plane of bearing outer ring.In this occasion, carry out the mensuration of insulating resistance value of a part of the circumferencial direction of insulating surface film, but on this part, obtain the higher contact rate of surface film contact and insulating surface film, can be with good precision determination insulating resistance value.
The insulation resistance test method of insulation bearing of the present invention is determined at the insulating resistance value that bearing outer ring has the insulation bearing of insulating surface film, the insulating surface film of the bearing outer ring in the surface film contact that formed by electroconductive polymer and the above-mentioned insulation bearing is contacted, the resistance instrument is connected in above-mentioned surface film contact, and between the part that does not cover for insulating surface film in the above-mentioned bearing outer ring, measure the insulating resistance value of above-mentioned insulation bearing.
If adopt this scheme because the surface film contact forms by electroconductive polymer, so the surface film contact because of its elastic deformation, easily and the jog that causes of the surfaceness of insulating surface film identical, do not contact partly with recess, obtain good contact rate.Thus, carry out the mensuration of correct insulating resistance value.In addition, because elastic deformation can take place the surface film contact,,, still prevent abrasion though produce elastic deformation so, produce under the situation of some slips even when pressing on the surface film contact on the insulating surface film.
Description of drawings
Fig. 1 (A) is the cut-open view of insulation resistance tester tool of the insulation bearing of the 1st embodiment of the present invention, the front elevation of the state that Fig. 1 (B) pulls down the cover of this insulation resistance tester tool for expression;
Fig. 2 is the cut-open view of expression by the major part of an example of the insulation bearing of this insulation resistance tester tool mensuration;
Fig. 3 is the key diagram of the determination of insulation resistance of this insulation resistance tester tool of employing;
Fig. 4 is for adopting the also key diagram of the insulation resistance pH-value determination pH of the insulation resistance tester tool of the insulation bearing of an embodiment of the present invention;
Fig. 5 is the key diagram of the insulation resistance pH-value determination pH of the insulation resistance tester tool of the insulation bearing of employing another embodiment of the present invention;
Fig. 6 (A) is for being installed on the also insulation resistance tester tool of an embodiment of the present invention the front elevation of the state on the insulation bearing, and Fig. 6 (B) is the key diagram of the insulation resistance pH-value determination pH of this insulation resistance tester tool of employing;
Fig. 7 is the key diagram of the insulation resistance pH-value determination pH of the insulation resistance tester tool of the insulation bearing of an employing embodiment more of the present invention;
Fig. 8 (A) is the cut-open view of existing example, and Fig. 8 (B) will have the front elevation of the state that the cover of example pulls down for expression;
Fig. 9 is the key diagram of the insulation resistance pH-value determination pH of existing example.
Embodiment
Below with reference to Fig. 1～Fig. 3 the 1st embodiment of the present invention is described.Fig. 1 represents the independent state of insulation resistance tester tool, and Fig. 2 represents to constitute the insulation bearing of determination object, and Fig. 3 represents insulation bearing is assemblied in state in the insulation resistance tester tool.As shown in Figure 2, in the insulation bearing 30 that constitutes determination object, on bearing outer ring 32, has insulating surface film 32a.This insulation bearing 30 is a rolling bearing, wherein between bearing inner race 31 and bearing outer ring 32, is provided with rotatable, the a plurality of rolling bodys 33 that form by ball, at outer diametric plane, in the scope of two breadths, be formed with the insulating surface film 32a of 1 layer of structure from bearing outer ring 32.Thus, the chimeric axle (not shown) that bearing inner race 31 is arranged and is separated in the electrical isolation mode between the shell (not shown) of supporting outer ring 32.The insulating surface film 32a surface film that pottery forms of serving as reasons, it is by on the surface of the mother metal 32b of bearing outer ring 32, and the mode of thermospraying pottery forms.Insulating surface film 32a also can be formed by resin.
As shown in Figure 1, this insulation resistance tester tool 1 comprises appliance body 2, cover 3, surface film contact 4,5.This appliance body 2 is for being divided into the ring-type of 2 parts, week within it, and the chimeric outer ring 32 that insulation bearing 30 is arranged, and this appliance body 2 has flange part 2a, and a breadth in this flange part 2a and the bearing outer ring 32 is faced.Cover 3 is the parts of ring-type, and it is installed on this appliance body 2 in mode removably, faces with another breadth in the above-mentioned bearing outer ring 32.Surface film contact 4,5 is arranged at the inner peripheral surface of appliance body 2 and the inner face of flange part 2a respectively, with the inner face of cover 3, contacts with the insulating surface film 32a of the bearing outer ring 32 of insulation bearing 30.Between the mother metal 32b of this surface film contact 4,5 and bearing outer ring 32, be connected with resistance instrument 6 (Fig. 3).
The material of surface film contact 4,5 is the electroconductive polymer of conducting rubber or Markite etc.,, adopts conducting rubber here.As the conducting rubber that constitutes surface film contact 4,5, adopting volume intrinsic resistance rate is 1.7 Ω cm, and thickness is the rubber bodies of 2mm.Above-mentioned conducting rubber is made by following manner, and this mode is: in manufacture process, in the elastomeric material of butyronitrile system, acrylic acid series, fluorine system, silicone-based etc., sneak into the conductive materials of carbon dust, carbon fiber etc.The shape of the conductive materials of being sneaked into also can powder, fibrous, such as, can be after the rubber sclerosis be shaped, obtain the hardness of the regulation that will describe the back, volume intrinsic resistance rate.
This appliance body 2 is 2 metal main body 2A of cutting apart of C shape by front shape, and 2B constitutes.Respectively cutting apart main body 2A, the two ends of 2B, installation sheet 2b is according to being provided with towards the side-prominent mode of external diameter respectively, and this installation sheet 2b is used for cutting apart main body 2A with two, and 2B by bolted, connects them mutually in the form of a ring.On two installation sheet 2b that cuts apart main body 2A, be provided with screw jack 7 therein, cut apart on two installation sheet 2b of main body 2B, the thread jack 8 that aligns with above-mentioned screw jack 7 is arranged respectively at another.Cut apart main body 2A for two, 2B screws togather with respective threads hole 8 by the bolt 10 that will pass screw jack 7 and realizes bolted, constitutes the appliance body 2 of ring-type.In this appliance body 2, the circumferential a plurality of positions with the side of side thereof opposite one side with flange part 2a are provided with threaded hole 9, and this threaded hole 9 is used for by the above-mentioned cover 3 of bolted.By bolted on the cover on this side 3, be provided with a plurality of screw jack (not shown)s of aliging with above-mentioned threaded hole 9.Screw togather with corresponding each threaded hole 9 by the bolt 11 that will pass these screw jacks, as Fig. 1 (A), cover 3 is anchored in this appliance body 2, on the side of a side opposite with flange part 2a one side by bolt.In addition, Fig. 1 (A) is for to be equivalent to along the cut-open view of the cut-open view of the I-I line among Fig. 1 (B).
Constitute two of appliance body 2 by bolted and cut apart main body 2A, 2B, cut apart main body 2A at these two, the involutory surface 12 of 2B, the state of 13 (Fig. 1 (B)) comprehensive engagement, the internal diameter size D1 of surface film contact 4 processes in the following manner, and this mode is: its outside dimension than the bearing outer ring surface film 32a that is assemblied in the insulation bearing 30 in this insulation resistance tester tool 1 is slightly little.In addition, at the involutory surface 14 of appliance body 2 with cover 3, the state of 15 (Fig. 1 (A)) comprehensive engagement, the part 4a of the inner face of the flange part 2a of the surface film contact 4 of appliance body 2 sides, and the size W between the surface film contact 5 of cover 3 sides processes in the following manner, and this mode is: it is slightly littler than the width that is assemblied in the insulation bearing 30 in this insulation resistance tester tool 1.By processing like this, cut apart main body 2A with two, 2B passes through bolted, constitute appliance body 2, in addition, cover 3 is anchored on this appliance body 2 by bolt, insulation bearing 1 is assemblied in the inside of insulation resistance tester tool 1, thus, surface film contact 4,5 contacts with the magnitude of interference of stipulating with the insulating surface film 32a of bearing outer ring 32.
As shown in Figure 3, at the state that insulation bearing 30 is assemblied in the insulation resistance tester tool 1, the surperficial whole zone of the insulating surface film 32a of bearing outer ring 32 is with surface film 4,5 contacts of appliance body 2 and cover 3.At this state, the ground terminal of resistance instrument 6 is connected with the outside surface of insulation resistance tester tool 1, line terminal is connected with the mother metal 32b of bearing outer ring 32, measure the insulating resistance value between the mother metal 32b of insulation resistance tester tool 1 and bearing outer ring 32.
If adopt the insulation resistance tester tool 1 of present embodiment, owing to the surface film contact 4 that forms by conducting rubber, 5 contact with the surface of bearing outer ring insulating surface film 32a in the insulation bearing 30, so passing through bolt 10,11 is fastening with this insulation resistance tester tool 1, during assembling insulation bearing 30, the small slip that produces between the inner face of the surface of insulating surface film 32a and insulation resistance tester tool 1 relatively, surface film contact 4,5 can be under the effect of elastic deformation, contacts with this surface in the mode on the surface of following insulating surface film 32a well.Thus, because above-mentioned small slip, insulation resistance tester tool 1 and insulating surface film 32a do not wear away, and can correctly measure insulating resistance value.The occasion of making by the pottery of thermospraying at insulating surface film 32a particularly, this surface is a uneven surface, but owing to the surface film contact 4 that forms by conducting rubber, 5 because of elastic deformation, easily identical with the jog on the surface of ceramic insulating surface film 32a, so surface film contact 4,5 increases with the contact rate of insulating surface film 32a, can measure correct insulating resistance value.
In addition, because this insulation resistance tester tool 1 is by the appliance body 2 of the ring-type that is divided into 2 parts that is provided with surface film contact 4, constitute with the cover 3 that is provided with surface film contact 5, at the state that insulation bearing 30 is assemblied in this insulation resistance tester tool 1, measure the insulating resistance value of insulation bearing 30, can with the outer diametric plane from bearing outer ring insulating surface film 32a, to whole contact of breadth, measure insulating resistance value, realize the good mensuration of precision.
For the performance of the appliance body 1 of confirming present embodiment,,, the electrical characteristics of identical insulation bearing 30 are compared with the mensuration system of the insulation resistance tester tool 41 that adopts Fig. 8 and past shown in Figure 9 by the occasion of said determination system.It the results are shown in the following table 1.
Table 1
| Embodiment | Existing example | |
| Working sample | The mensuration utensil of band conductive rubber | Not with the mensuration utensil of conductive rubber |
| ????A | ????0.18×10 -7A | ????0.30×10 -5A |
| ????B | ????0.52×10 -8A | ????0.50×10 -8A |
Table 1 expression between the surface and bearing outer ring mother metal 32b of insulation resistance tester tool 1,41, applies the occasion of the voltage of 500V at above-mentioned each mensuration system, the comparative result when measuring the current value (A) that flows through insulation bearing 30.If according to the result of table 1, the current value of the occasion of the embodiment of use surface film contact 4,5 is higher than the occasion of existing example.In theory, the surface area of insulating surface film 32a is big more, insulating resistance value is big more, thus, the result of table 1 shows: for the real contact area of insulation resistance tester tool 1,41 with insulating surface film 32a, adopt surface film contact 4, the occasion of 5 present embodiment is bigger, can more correctly measure insulating resistance value.
In addition, in order to confirm the surface film contact 4 of present embodiment, 5 influences own to insulating resistance value, for on the surface of bearing outer ring, form insulating surface film, in addition on this surface, form the another kind of insulation bearing of metal level (electric conductor), carry out insulation resistance tester tool 1,, measure the test of insulating resistance value with the insulation resistance tester tool 41 of Fig. 8 and existing example shown in Figure 9 by present embodiment.In this test findings, in the occasion of present embodiment and the occasion of existing example, above-mentioned insulating resistance value is 50M Ω (when adding 500V), the influence that surface film contact 4,5 is arranged unconfirmed.In addition, in this test, because the outermost layer of bearing outer ring is an electric conductor, so almost there be not of the influence of the actual contact rate of bearing outer ring and insulation resistance tester tool to resistance value.
In addition, in the present embodiment, form surface film contact 4, it is 1.7 Ω cm that 5 conducting rubber adopts volume intrinsic resistance rate, thickness is the rubber bodies of 2mm, but because the desired resistance value of insulation bearing is less than 1M Ω, so that resistivity is the higher electric conductivity of 1.7 Ω cm is optional for surface film contact 4,5.In Fig. 1, represent by S1 at the part 4a of the inner face of the flange part 2a of surface film contact 4 and the surface contact area of insulating surface film 32a, the surface film contact 4 of the inner face of cover 3 is represented by S2 with the surface contact area of insulating surface film 32a, the occasion that the part 4b of the aperture surface of the appliance body 2 of surface film contact 4 and the surface contact area of insulating surface film 32a are represented by S3, the resistance value of corresponding contact area can be by following formulate.
The resistance R 1=ρ of S1 * (T/S1)
The resistance R 2=ρ of S2 * (T/S2)
The resistance R 3=ρ of S3/(2 * π * B) * 1n (D+2 * T)/D)
Wherein:
ρ: volume intrinsic resistance rate
T: the thickness of insulating surface film 32a
B: axially contact amplitude
D: the diameter dimension on the border of insulating surface film 32a and bearing outer ring mother metal 32b
The resistance value R of bearing integral is in the relation of 1/R=1/R1+1/R2+1/R3, the resistance value of this occasion can be controlled at more than the 1M Ω.With surface film contact 4,5 thickness is updated to the occasion in the formula, even consider in the resistance value of surface film contact 4,5 under the situation of occasion of safety coefficient of error at measurment etc., still can be the surface film contact 4,5 that has less than 10K Ω volume intrinsic resistance rate.Obviously, can be according to low more, the more little degree of volume intrinsic resistance rate of surface film contact 4,5, reduce the error of the determination of insulation resistance value that will obtain.
In addition, surface film contact 4,5 hardness is more little, surface film contact 4,5 follow insulating surface film 32a the surface jog and be in contact with it easy more, but, in that being reduced, above-mentioned hardness reaches the occasion more than the necessary degree, if the surface film contact 4,5 and the magnitude of interference between the insulating surface film 32a will be by bolted insulation resistance tester tool 1 time be set so greatly, then surface film contact 4,5 and not comprehensive engagement of insulating surface film 32a.Otherwise, if surface film contact 4,5 hardness is too high, surface film contact 4 by bolted insulation resistance tester tool 1,5 o'clock surface film contact 4,5 follow the surface of insulating surface film 32a and the performance that changes reduces, and surface film contact 4,5 reduces with the actual contact rate of the jog on the surface of insulating surface film 32a.Owing to these reasons, the hardness of surface film contact 4,5 can be in the scope of HS55～HS99, and in addition, the viewpoint from the operation of bolted is preferably HS70 ± 10.
Fig. 4 represents another embodiment of the present invention.The insulation resistance tester tool 1A of this insulation bearing is following form, wherein at the insulation resistance tester tool 1 of the 1st embodiment shown in Figure 1, by with surface film contact 4,5 identical electroconductive polymers, form appliance body 2 and cover 3, appliance body 2 and cover 3 itself form the surface film contact thus, omit the surface film contact 4,5 as separate part.The internal diameter of the internal diameter of mensuration utensil and the surface film contact 4,5 of inner width and the 1st embodiment equates with inner width.The mode and 1st of other composition during with the insulation measured value of measuring insulation bearing 30
The occasion of embodiment is identical.
In the insulation resistance tester tool 1A of this embodiment, because it is own by conducting rubber to constitute its appliance body 2 and cover 3, the electroconductive polymer of Markite etc. forms, passing through bolt 10,11 fastening insulation resistance tester tool 1A, during assembling insulation bearing 30, the small slip that is produced between the inner face of the surface of insulating surface film 32a and insulation resistance tester tool 1A relatively, the inner face of insulation resistance tester tool 1A can follow the surface of insulating surface film 32a to be in contact with it by its elastic deformation well, obtains higher contact rate.Thus, not because of above-mentioned small slip, the situation of insulation resistance tester tool 1A and insulating surface film 32a abrasion can correctly be measured insulating resistance value.In addition, because appliance body 2 and cover 3 form by the surface film contact, so and as the embodiment of Fig. 1, the occasion that surface film contact 4,5 is installed on independent appliance body 2 and the cover 3 is compared, simple in structure.
Fig. 5 represents another embodiment of the present invention.The insulation resistance tester tool 1B of this insulation bearing is formed by the surface film contact 16 of the ring-type that contacts with the breadth of the bearing outer ring 32 of insulation bearing 30.The material of surface film contact 16 is an electroconductive polymer, and this point is identical with the occasion of the 1st embodiment.
When adopting this insulation resistance tester tool 1B to measure the insulating resistance value of insulation bearing 30, at the breadth that makes above-mentioned surface film contact 16 with bearing outer ring 32, promptly, the breadth part 32a state of contact of insulating surface film 32a, the ground terminal of resistance instrument 6 and line terminal, contact with the mother metal 32b of surface film contact 16 and bearing outer ring 32, measure the insulating resistance value between surface film contact 16 and the bearing outer ring mother metal 32b.
Because the same insulation resistance tester tool 1B that passes through the insulation bearing of present embodiment, surface film contact 16 is because of its elastic deformation, follow the breadth part 32ab of bearing outer ring insulating surface film 32a well and be in contact with it, actual contact rate between two parts of event increases, and can correctly measure insulating resistance value.
Fig. 6 represents an embodiment more of the present invention.The insulation resistance tester tool 1C of this insulation bearing is formed by the surface film contact 17 of the ring-type on the outer diametric plane of the bearing outer ring 32 that is covered in insulation bearing 30 with elastic type as Fig. 6 (A).The material of this surface film contact 17 is an electroconductive polymer, and this point is identical with the occasion of the 1st embodiment.
When adopting this insulation resistance tester tool 1C to measure the insulating resistance value of insulation bearing 30, as Fig. 6 (B), make above-mentioned surface film contact 17 be covered in the outer diametric plane of bearing outer ring 32, it is the state on the outer diametric plane 32aa of insulating surface film 32a, the ground terminal of resistance instrument 6 is contacted with the mother metal 32b of line terminal with surface film contact 17 and bearing outer ring 32, measure the insulating resistance value between surface film contact 17 and the bearing outer ring mother metal 32b.
Because the same insulation resistance tester tool 1C that passes through the insulation bearing of present embodiment, surface film contact 17 is because of its elastic deformation, follow the outer radius portion 32aa of bearing outer ring insulating surface film 32a well and be in contact with it, actual contact rate between two parts of event increases, and can correctly measure insulating resistance value.
Fig. 7 represents another embodiment of the present invention.The insulation resistance tester tool 1D of this insulation bearing is formed by appliance body 20 and membranaceous surface film contact 21, this appliance body 20 has the recess 20a that the part of the circumferencial direction of the bearing outer ring 32 that can make insulation bearing 30 enters, this surface film contact 21 extends at the opening part plane earth of the recess 20a of this appliance body 20, contacts with above-mentioned bearing outer ring 32.The material of this surface film contact 21 is an electroconductive polymer, and this point is identical with the occasion of the 1st embodiment.
When adopting this insulation resistance tester tool 1D to measure the insulating resistance value of insulation bearing 30, in the part of above-mentioned surface film contact 21 with the circumferencial direction of the bearing outer ring 32 of insulation bearing 30, promptly, a part of state of contact of the outer radius portion 32aa of bearing outer ring insulating surface film 32a, the ground terminal of resistance instrument 6 is contacted with the mother metal 32b of line terminal with surface film contact 21 and bearing outer ring 32, measure the insulating resistance value between surface film contact 21 and the bearing outer ring mother metal 32b.
Because the same insulation resistance tester tool 1D that passes through the insulation bearing of present embodiment, surface film contact 21 is because of its elastic deformation, follow the outer radius portion 32aa of bearing outer ring insulating surface film 32a well and be in contact with it, actual contact rate between two parts of event increases, and can correctly measure insulating resistance value.
Claims (8)
1. the insulation resistance tester tool of an insulation bearing, this insulation resistance tester tool is determined at the insulating resistance value of the insulation bearing that has insulating surface film on the bearing outer ring, it is characterized in that the surface film contact is formed by electroconductive polymer, this surface film contact contacts with the insulating surface film of the bearing outer ring of above-mentioned insulation bearing, is connected with the resistance instrument.
2. the insulation resistance tester tool of insulation bearing according to claim 1 is characterized in that above-mentioned electroconductive polymer is formed by conducting rubber.
3. the insulation resistance tester tool of insulation bearing according to claim 1 and 2, it is characterized in that the appliance body that it comprises the ring-type that is divided into 2 parts, the interior week of this appliance body and the outer ring of insulation bearing are chimeric, and this appliance body has a flange part that breadth is faced with above-mentioned bearing outer ring; Cover, this cover is installed on this appliance body in mode removably, faces with another breadth of above-mentioned bearing outer ring; The surface film contact, this surface film contact is arranged at the inner peripheral surface of above-mentioned appliance body and the inner face of flange part, and the inner face of above-mentioned cover, contacts with the insulating surface film of above-mentioned bearing outer ring, is connected with above-mentioned resistance instrument.
4. the insulation resistance tester tool of insulation bearing according to claim 1 and 2, it is characterized in that above-mentioned surface film contact is made of the appliance body and the cover of the ring-type that is divided into 2 parts, the interior week of this appliance body and the bearing outer ring of insulation bearing are chimeric, and this appliance body has a flange part that breadth contacts with above-mentioned bearing outer ring, this cover is installed on the above-mentioned appliance body in mode removably, contacts with another breadth in the above-mentioned bearing outer ring.
5. the insulation resistance tester tool of insulation bearing according to claim 1 and 2 is characterized in that the parts of above-mentioned surface film contact for the ring-type that contacts with the breadth of bearing outer ring in the above-mentioned insulation bearing.
6. the insulation resistance tester tool of insulation bearing according to claim 1 and 2 is characterized in that the parts of above-mentioned surface film contact for the ring-type on the outer diametric plane of the bearing outer ring that is covered in above-mentioned insulation bearing with elastic type.
7. the insulation resistance tester tool of insulation bearing according to claim 1 and 2, it is characterized in that it is made of appliance body and membranaceous surface film contact, this appliance body has the enterable recess of a part of the circumferencial direction of the bearing outer ring in the above-mentioned insulation bearing, this surface film contact extends with the opening part of planar fashion at the recess of above-mentioned appliance body, contacts with above-mentioned bearing outer ring.
8. the insulation resistance test method of an insulation bearing, this method is determined at the insulating resistance value that bearing outer ring has the insulation bearing of insulating surface film, it is characterized in that making the insulating surface film of the bearing outer ring in the surface film contact that forms by electroconductive polymer and the above-mentioned insulation bearing to contact, the resistance instrument is connected between the part that does not cover for insulating surface film in above-mentioned surface film contact and the above-mentioned bearing outer ring, measures the insulating resistance value of above-mentioned insulation bearing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP186471/2003 | 2003-06-30 | ||
| JP2003186471A JP4369692B2 (en) | 2003-06-30 | 2003-06-30 | Insulation resistance measurement jig for insulation bearing and measurement method |
| JP186471/03 | 2003-06-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1576864A true CN1576864A (en) | 2005-02-09 |
| CN100416281C CN100416281C (en) | 2008-09-03 |
Family
ID=34185583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031461735A Expired - Lifetime CN100416281C (en) | 2003-06-30 | 2003-07-25 | Insulation resistance tester for insulation bearing and detecting method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4369692B2 (en) |
| CN (1) | CN100416281C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214226A (en) * | 2014-09-24 | 2014-12-17 | 如皋市非标轴承有限公司 | Glass fiber composite slewing bearing and manufacturing method thereof |
| CN105388404A (en) * | 2015-11-19 | 2016-03-09 | 南车株洲电机有限公司 | Insulated bearing electric testing tool |
| CN107921816A (en) * | 2015-08-10 | 2018-04-17 | Ntn株式会社 | Bearing apparatus for wheel |
| CN113702708A (en) * | 2021-08-09 | 2021-11-26 | 武汉理工大学 | Ring resistivity detection device and ring performance evaluation method based on resistivity |
| CN113759173A (en) * | 2020-06-01 | 2021-12-07 | 中车永济电机有限公司 | Bearing insulation resistance detection device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4795888B2 (en) * | 2006-07-28 | 2011-10-19 | Ｎｔｎ株式会社 | Method for manufacturing bearing member raceway and method for manufacturing rolling bearing |
| JP5654782B2 (en) * | 2010-06-22 | 2015-01-14 | 株式会社ディスコ | Grinding equipment |
| JP2015184153A (en) * | 2014-03-25 | 2015-10-22 | Ntn株式会社 | Device and method for inspecting internal defect of bearing part |
| JP7022619B2 (en) * | 2018-03-02 | 2022-02-18 | Ntn株式会社 | Insulation resistance measuring jig and insulation resistance measuring method for insulated bearings |
| CN111041911B (en) * | 2019-12-05 | 2021-11-16 | 中铁七局集团郑州工程有限公司 | Method for testing resistance of steel bar of railway ballastless track bed |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59127922U (en) * | 1983-02-16 | 1984-08-28 | 日本精工株式会社 | rolling bearing assembly |
| JPS6166545A (en) * | 1984-09-06 | 1986-04-05 | Toshiba Corp | Detector for defect in winding |
| JPS62114365U (en) * | 1986-01-08 | 1987-07-21 | ||
| JPH06147231A (en) * | 1992-09-24 | 1994-05-27 | Bando Chem Ind Ltd | Electric insulating bearing |
| US5796262A (en) * | 1996-02-14 | 1998-08-18 | Westinghouse Electric Corporation | Method and apparatus for diagnosing bearing insulation impedance of a rotating electrical apparatus |
| JP3738556B2 (en) * | 1997-05-12 | 2006-01-25 | 日本精工株式会社 | Anti-corrosion rolling bearing |
| JP2000088901A (en) * | 1998-09-08 | 2000-03-31 | Advantest Corp | Surface and volume electrical resistance measurement device |
| JP4334708B2 (en) * | 1999-11-30 | 2009-09-30 | 日置電機株式会社 | measuring device |
| JP2002048145A (en) * | 2000-08-04 | 2002-02-15 | Ntn Corp | Anti-electrolytic corrosion rolling bearing |
-
2003
- 2003-06-30 JP JP2003186471A patent/JP4369692B2/en not_active Expired - Lifetime
- 2003-07-25 CN CNB031461735A patent/CN100416281C/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214226A (en) * | 2014-09-24 | 2014-12-17 | 如皋市非标轴承有限公司 | Glass fiber composite slewing bearing and manufacturing method thereof |
| CN104214226B (en) * | 2014-09-24 | 2016-09-07 | 如皋市非标轴承有限公司 | A kind of manufacture method of glass fibre composite revolving bearing |
| CN107921816A (en) * | 2015-08-10 | 2018-04-17 | Ntn株式会社 | Bearing apparatus for wheel |
| CN107921816B (en) * | 2015-08-10 | 2021-08-17 | Ntn株式会社 | Bearing device for wheel |
| CN105388404A (en) * | 2015-11-19 | 2016-03-09 | 南车株洲电机有限公司 | Insulated bearing electric testing tool |
| CN113759173A (en) * | 2020-06-01 | 2021-12-07 | 中车永济电机有限公司 | Bearing insulation resistance detection device |
| CN113702708A (en) * | 2021-08-09 | 2021-11-26 | 武汉理工大学 | Ring resistivity detection device and ring performance evaluation method based on resistivity |
| CN113702708B (en) * | 2021-08-09 | 2024-01-16 | 武汉理工大学 | Ring resistivity detection device and ring performance evaluation method based on resistivity |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005017251A (en) | 2005-01-20 |
| CN100416281C (en) | 2008-09-03 |
| JP4369692B2 (en) | 2009-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1576864A (en) | Insulation resistance tester for insulation bearing and detecting method | |
| US10557766B2 (en) | Torque sensor for detecting occurrence of metal fatigue in an elastic body | |
| US9791348B2 (en) | Sensor for wear measurement, method for making same, and method for operating same | |
| US9281598B2 (en) | Contact element | |
| EP0949704A1 (en) | Separator for polymer electrolyte fuel cell and process for production thereof | |
| CN1649052A (en) | Solid electrolytic capacitor and method for manufacturing the same | |
| EP1672326B1 (en) | Angle measurement device | |
| CN112020654A (en) | Testing device | |
| DE102019007667A1 (en) | SCANNER UNIT FOR AN ANGLE MEASURING DEVICE | |
| CN1643387A (en) | Contactor assembly for testing ceramic surface mount devices and other electronic components assembled by said contactor | |
| CN1854545A (en) | Rolling bearing device with sensor and strain sensor | |
| CN101441234A (en) | Self-adapting stabilized contact electric resistance measuring apparatus | |
| KR100914586B1 (en) | Solid electrolytic capacitor | |
| CN218864990U (en) | Adjusting tool for manufacturing high-precision angle displacement sensor | |
| DE102019007681A1 (en) | Scanning unit for an angle measuring device | |
| CN114527165A (en) | Lubricating grease resistivity measuring device | |
| JP7022619B2 (en) | Insulation resistance measuring jig and insulation resistance measuring method for insulated bearings | |
| CN2757136Y (en) | Probe contact head for carbon product resistivity detection | |
| EP3162555A1 (en) | Pressure-responsive laminate, coating layer and pressure responsiveness-imparting material | |
| KR20170131988A (en) | Sensor for detecting pressure and insol of sensing pressure including the same | |
| US20230236149A1 (en) | Electrochemical sensor | |
| CN214868588U (en) | Mounting structure capable of adjusting gear center distance | |
| CN1183648C (en) | Motor assembly for power tools | |
| CN216055599U (en) | Conductive connecting device of large-scale rotating equipment | |
| CN214427333U (en) | Online moisture meter contact structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080903 |
|
| CX01 | Expiry of patent term |