CN211826377U - DC motor rotor detecting instrument for railway - Google Patents
DC motor rotor detecting instrument for railway Download PDFInfo
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- CN211826377U CN211826377U CN201922110459.8U CN201922110459U CN211826377U CN 211826377 U CN211826377 U CN 211826377U CN 201922110459 U CN201922110459 U CN 201922110459U CN 211826377 U CN211826377 U CN 211826377U
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- railway
- motor rotor
- springs
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Abstract
The utility model relates to a direct current motor rotor detecting instrument for railway, characterized by: the detection instrument at least comprises a base (2), the inner cavity of the base (2) is formed by two circles with different radiuses, the radius circle from the bottom edge of the base (2) is small, the radius circle from the upper opening of the base (2) is large, and the inner cavity penetrates through the whole base (2); two circles with different radiuses form a circumferential step in the cavity of the base (2), and three uniformly distributed hole sites (9) are distributed along the circumferential step; the three conductive probes (3) and the three springs (4) are respectively embedded into the three uniformly distributed hole sites (9), so that the three conductive probes (3) penetrate to the bottom edge of the base (2) from the upper cavity. The railway DC motor rotor detection instrument has a simple structure, can quickly and accurately forecast potential hidden dangers of a rotor, can accurately detect the problems of turn-to-turn short circuit, coil corona discharge and local short circuit, and provides data support for improving and solving the problems.
Description
Technical Field
The utility model belongs to the technical field of direct current motor for railway switch machine, especially, relate to a direct current motor rotor detecting instrument for railway.
Background art:
with the multiple acceleration of railways in China, the quality requirements on turnout equipment are higher and higher, and the turnout equipment are important factors for safe operation and on-spot arrival of trains.
Since the advent of electric switch machines, 90% of the switch machines used series-wound dc motors as power elements. At present, in the currently operated railway, the direct current motors selected by most electric switch machines need to pass through two to three intermediate repair periods, namely, the service lives of 10 years to 15 years, in the intermediate repair period, all motors need to be disassembled and detected, particularly, the potential hidden danger of a rotor is difficult to detect, and the potential fault is generated in time after the intermediate repair and the previous pass. The method is mainly embodied in related winding detection, turn-to-turn short circuit, coil corona discharge and local short circuit of the micro direct current motor.
The invention content is as follows:
the utility model discloses a solve the technical problem that above-mentioned exists, provide a simple structure, the quick potential hidden danger of accurate forecast rotor examine direct current motor rotor detecting instrument for the railway to detection that can be accurate gives turn-to-turn short circuit, coil corona discharge, local short circuit problem, provides data support for improving and solving these problems.
The technical scheme of the utility model be, provide a direct current motor rotor detecting instrument for railway, characterized by: the detection instrument at least comprises a base, the inner cavity of the base is formed by two circles with different radiuses, the radius circle from the bottom edge of the base is small, the radius circle from the upper opening of the base is large, and the inner cavity penetrates through the whole base; two circles with different radiuses form a circumferential step in the cavity of the base, and three uniformly distributed hole sites are distributed along the circumferential step; the three conductive probes and the three springs are respectively embedded into the three uniformly distributed hole sites, so that the three conductive probes penetrate to the bottom edge of the base from the upper cavity; the lower ends of the three springs at the bottom edge of the base are fixed by a baffle plate, a flat pad, a spring gasket and a nut.
The diameter of the inner cavity on the base is larger than that of the sample piece of the rotor commutator to be measured.
The three conductive probes are uniformly distributed on the circumference of the base.
The three springs are compression springs, tension springs or disc springs.
The three conductive probes are made of conductive metal materials.
The three conductive probes are distributed along the circumferential step by 120 degrees.
The base is insulated and isolated by the surface part of the insulating material contacted with the conductive part, three observation holes are formed in the side surface of the base at the large-radius cavity part, and the three conductive probes are arranged in the three observation holes.
The utility model discloses a principle and advantage are:
the instrument adopts a single high-voltage loop, and determines the fault position by using the difference of waveform attenuation by a pulse waveform comparison method. When high-voltage discharge occurs, the high-voltage discharge electrode is dynamically and electrically connected with an electrode at the lower end of the sample piece 1 of the rotor to be detected, potential hidden dangers of the rotor can be pre-judged, potential faults which cannot be found in the conventional voltage state are solved, and the detection efficiency is improved.
The invention will be further explained with reference to the drawings of the embodiments.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the base;
fig. 3 is a sectional view taken along the line a-a of fig. 2.
In the figure, 1, a sample piece of a rotor commutator to be tested; 2. a base; 3. a conductive probe; 4. a spring; 5. a baffle plate; 6. a flat gasket 7, a spring gasket 8 and a nut; 9. three evenly distributed hole sites; 10. three observation holes.
Detailed Description
Example 1
As shown in fig. 1, 2 and 3, the utility model relates to a dc motor rotor detecting instrument for railway, which is characterized in that: the detection instrument at least comprises a base 2, the inner cavity of the base 2 is formed by two circles with different radiuses, the radius circle from the bottom edge of the base 2 is small, the radius circle from the upper opening of the base 2 is large, and the inner cavity penetrates through the whole base 2; two circles with different radiuses form a circumferential step in the cavity of the base 2, and three uniformly distributed hole sites 9 are distributed along the circumferential step; the three conductive probes 3 and the three springs 4 are respectively embedded into the three uniformly distributed hole sites 9, so that the three conductive probes 3 penetrate through the bottom edge of the base 2 from the upper cavity; the lower ends of three springs 4 at the bottom edge of the base 2 are fixed by a baffle 5, a flat gasket 6, a spring gasket 7 and a nut 8; the diameter of an inner cavity on the base 2 is larger than that of the rotor commutator sample 1 to be tested; the three conductive probes 3 are uniformly distributed on the central circumference of the base 2; the three springs 4 are compression springs, and the three conductive probes 3 are made of conductive metal materials; three conductive probes 3 are distributed along the circumferential step by 120 degrees.
Example 2
As shown in fig. 1, 2 and 3, the utility model relates to a dc motor rotor detecting instrument for railway, which is characterized in that: the detection instrument at least comprises a base 2, the inner cavity of the base 2 is formed by two circles with different radiuses, the radius circle from the bottom edge of the base 2 is small, the radius circle from the upper opening of the base 2 is large, and the inner cavity penetrates through the whole base 2; two circles with different radiuses form a circumferential step in the cavity of the base 2, and three uniformly distributed hole sites 9 are distributed along the circumferential step; the three conductive probes 3 and the three springs 4 are respectively embedded into the three uniformly distributed hole sites 9, so that the three conductive probes 3 penetrate through the bottom edge of the base 2 from the upper cavity; the lower ends of three springs 4 at the bottom edge of the base 2 are fixed by a baffle 5, a flat gasket 6, a spring gasket 7 and a nut 8. The diameter of an inner cavity on the base 2 is larger than that of the rotor commutator sample 1 to be tested; the three conductive probes 3 are uniformly distributed on the central circumference of the base 2; the three springs 4 are compression springs, and the three conductive probes 3 are made of conductive metal materials; three conductive probes 3 are distributed along the circumferential step by 120 degrees.
The base 2 is made of insulating materials and is insulated and isolated from the surface part contacted with the conductive part, three observation holes 10 are formed in the side face of the base 2 at the large-radius cavity, and the three conductive probes 3 are arranged in the three observation holes 10.
The utility model discloses a theory of operation is: when the testing device works, the sample piece 1 of the rotor commutator to be tested is placed in the inner cavity of the base 2, sufficient pressure is formed for the conductive probe 3, and the conductive probe 3 is ensured to be reliably contacted with the motor commutator segment of the sample piece 1 of the rotor commutator to be tested. The lower ends of the conductive probes 3 are respectively connected with three leads and are connected with discharge devices H1, H2 and L to form a loop.
When high-voltage discharge occurs, the high-voltage discharge is dynamically and electrically connected with an electrode at the lower end of a sample piece 1 of the rotor commutator to be detected, the detection instrument obtains two paths of waveforms of the sample piece 1 of the rotor commutator to be detected through three conductive probes 3, attenuation comparison is carried out according to the two paths of waveforms, and then through a reversing function, whether potential faults such as insulation, resistance, inductance and the like exist or not is checked through pairwise comparison. Three uniformly distributed hole sites 9 and a concave structure capable of holding the excircle of the commutator are strictly arranged on the base 2; the spring 4 forms enough pressure for the conductive probe 3 to ensure that the conductive probe 3 is reliably contacted with the motor commutator segment.
The base 2 is made of insulating material or is insulated and isolated from the surface part contacted with the conductive part, and the base 2 is provided with three observation holes 10 so as to check the contact degree of the probe and the commutator segment.
Claims (7)
1. A railway direct current motor rotor detecting instrument is characterized in that: the detection instrument at least comprises a base (2), the inner cavity of the base (2) is formed by two circles with different radiuses, the radius circle from the bottom edge of the base (2) is small, the radius circle from the upper opening of the base (2) is large, and the inner cavity penetrates through the whole base (2); two circles with different radiuses form a circumferential step in the cavity of the base (2), and three uniformly distributed hole sites (9) are distributed along the circumferential step; the three conductive probes (3) and the three springs (4) are respectively embedded into the three uniformly distributed hole sites (9), so that the three conductive probes (3) penetrate to the bottom edge of the base (2) from the upper cavity; the lower ends of three springs (4) at the bottom edge of the base (2) are fixed by a baffle (5), a flat pad (6), a spring gasket (7) and a nut (8).
2. The railway dc motor rotor tester according to claim 1, wherein: the diameter of the inner cavity on the base (2) is larger than that of the sample piece (1) of the rotor commutator to be measured.
3. The railway dc motor rotor tester according to claim 1, wherein: the three conductive probes (3) are uniformly distributed on the circumference of the base (2).
4. The railway dc motor rotor tester according to claim 1, wherein: the three springs (4) can be compression springs, tension springs or disc springs.
5. The railway dc motor rotor tester according to claim 1, wherein: the three conductive probes (3) are made of conductive metal materials.
6. The railway dc motor rotor tester according to claim 1, wherein: the three conductive probes (3) are distributed along the circumferential step by 120 degrees.
7. The railway dc motor rotor tester according to claim 2, wherein: the base (2) is made of insulating materials and is insulated and isolated from the surface part contacted with the conductive part, three observation holes (10) are formed in the side surface of the base (2) at the large-radius cavity, and the three conductive probes (3) are arranged in the three observation holes (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922110459.8U CN211826377U (en) | 2019-11-30 | 2019-11-30 | DC motor rotor detecting instrument for railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922110459.8U CN211826377U (en) | 2019-11-30 | 2019-11-30 | DC motor rotor detecting instrument for railway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211826377U true CN211826377U (en) | 2020-10-30 |
Family
ID=73031463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922110459.8U Active CN211826377U (en) | 2019-11-30 | 2019-11-30 | DC motor rotor detecting instrument for railway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211826377U (en) |
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2019
- 2019-11-30 CN CN201922110459.8U patent/CN211826377U/en active Active
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