CN202374125U - Grounding brush device of alternating current variable frequency motor - Google Patents
Grounding brush device of alternating current variable frequency motor Download PDFInfo
- Publication number
- CN202374125U CN202374125U CN2011204509845U CN201120450984U CN202374125U CN 202374125 U CN202374125 U CN 202374125U CN 2011204509845 U CN2011204509845 U CN 2011204509845U CN 201120450984 U CN201120450984 U CN 201120450984U CN 202374125 U CN202374125 U CN 202374125U
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- brush
- plate
- galvanized steel
- grounding
- variable frequency
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- Expired - Fee Related
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Abstract
The utility model provides a grounding brush device of an alternating current variable frequency motor. The grounding brush device comprises a metal tube, a galvanized steel hexagon bolt, a galvanized steel washer, a galvanized spring washer, a plate, a cylindrical pin, a connection plate, a fixed brush box plate, a brush, a brush box and an insulating bearing sleeve, wherein the brush is arranged in the brush box; the brush, the brush box and the fixed brush box plate are fixed and connected to the connection plate; the connection plate is connected with the plate through the cylindrical pin; and the metal tube and the plate are connected to the insulating bearing sleeve through the galvanized steel hexagon bolt, the galvanized steel washer and the galvanized spring washer. The grounding brush device of the alternating current variable frequency motor has the advantages that by arranging a grounding brush on the insulating bearing sleeve, passing of shaft current can be completely prevented, a shaft current loop is cut off, and the aim of protecting a bearing is fulfilled.
Description
Technical field
The utility model relates to the grounding brush device of alternating-current variable frequency motor.
Background technology
During the alternating-current variable frequency motor operation, because stator magnetic circuit is uneven, alternating flux cutting rotating shaft is arranged around the axle, induce shaft voltage at the axle two ends, axle forms a closed-loop path with two bearings, support, produces shaft current.Shaft current partial discharge energy discharges the high temperature that produces, and can melt many tiny areas on bearing inner race, outer ring or the ball, forms groove, thereby produces noise, vibration.Therefore, adopt rationally reliable measure to prevent shaft current, protection variable-frequency high-voltage motor bearing arrangement, it is necessary just to seem.
At present, alternating-current variable frequency motor generally adopts the grounding brush device with shaft current ground connection, to eliminate shaft current, reduces the damage of shaft current to bearing, rotating shaft, eliminates the potential difference between the bearing enclose.As shown in Figure 1, existing grounding brush 101 is installed on the bearing end cover 102, therefore shaft current is not had inhibition, very easily burns out a bearing.
The utility model content
The purpose of the utility model is to overcome above-mentioned weak point, thereby a kind of grounding brush device of alternating-current variable frequency motor is provided, and under the condition that guarantees motor safety property and reliability, utilizes effective measures, and motor bearings is protected.
The technical scheme of the utility model is following:
A kind of grounding brush device of alternating-current variable frequency motor comprises metal tube, galvanized steel hex bolts, galvanized steel packing ring, galvanized iron spring packing ring, plate, straight pin, connecting plate, fixedly brush box plate, brush, brush box and insulation bearing cover; Said brush is installed in the brush box; Brush, brush box and fixedly the brush box plate fix and be connected on the connecting plate; Said connecting plate is connected with plate through straight pin, and said metal tube and plate are connected to insulation bearing and put through galvanized steel hex bolts, galvanized steel packing ring, galvanized iron spring packing ring together.
The useful technique effect of the utility model is:
The utility model changes the plain bearing enclosing cover of shaft extension end place bearing into the insulation bearing cover, and grounding brush is installed in insulation bearing and puts and can hinder passing through of shaft current completely, cuts off the shaft current loop, thereby realizes the purpose of protection bearing.The utility model is simple in structure, compact, and action effect is obvious; Under the situation that does not change structural material; Under the condition that guarantees motor safety property and reliability, do not change under the situation of structural material, under the condition that guarantees motor safety property and reliability; Change the installation site of grounding brush, reach the purpose of alternating-current variable frequency motor insulation against ground.
Description of drawings
Fig. 1 is the structural representation of existing grounding brush device.
Fig. 2 is the structural representation of the utility model.
Fig. 3 is the right view of Fig. 2.
Embodiment
Further specify below in conjunction with the embodiment of accompanying drawing the utility model.
Like Fig. 2, shown in Figure 3, the utility model comprises metal tube 1, galvanized steel hex bolts 2, galvanized steel packing ring 3, galvanized iron spring packing ring 4, plate 5, straight pin 6, connecting plate 7, fixedly brush box plate 8, brush 9, brush box 10 and insulation bearing overlap 11.Brush 9 is installed in the brush box 10; Brush 9, brush box 10 are by fixing brush box plate 8 fixing being connected on the connecting plate 7 then; Connecting plate 7 is connected on the plate 5 through straight pin 6, and metal tube 1 is connected on the insulation bearing cover 11 through galvanized steel hex bolts 2, galvanized steel packing ring 3, galvanized iron spring packing ring 4 with plate 5 again.
The installation process of the utility model is following: brush 9 and brush box 10 are by galvanized steel hex bolts, galvanized steel packing ring and fixedly brush box plate 8 is fixing; Fixedly brush box plate 8 is connected on the plate 5 through connecting plate 7; The size of plate 5 depends on the size of insulation bearing cover 11, is connected on the insulation bearing cover 11 through metal tube 1 again.The length of metal tube 1 depends on the size that is attached thereto axle 12.
The grounding brush installation site of the utility model, the grounding brush that is different from the past is installed on the bearing end cover, and advantage is that grounding brush is connected the effect that can fully be grounded brush on the insulation bearing cover 11; Axle 12 is connected with insulation bearing cover 11 through grounding brush; Electric current is played inhibition, play guaranteeing bearing insulation against ground purpose, reach the effect of protection bearing; Fully prolong the life-span of bearing, and reach the requirement safe in utilization of variable-frequency motor.
Above-described only is the preferred implementation of the utility model, and the utility model is not limited to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite of the basic design that does not break away from the utility model, all should think to be included within the protection range of the utility model.
Claims (1)
1. the grounding brush device of an alternating-current variable frequency motor is characterized in that: comprise metal tube (1), galvanized steel hex bolts (2), galvanized steel packing ring (3), galvanized iron spring packing ring (4), plate (5), straight pin (6), connecting plate (7), fixedly brush box plate (8), brush (9), brush box (10) and insulation bearing cover (11); Said brush (9) is installed in the brush box (10); Brush (9), brush box (10) are fixing and be connected on the connecting plate (7) with fixing brush box plate (8); Said connecting plate (7) is connected with plate (5) through straight pin (6), and said metal tube (1) and plate (5) are connected on the insulation bearing cover (11) through galvanized steel hex bolts (2), galvanized steel packing ring (3), galvanized iron spring packing ring (4) together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204509845U CN202374125U (en) | 2011-11-15 | 2011-11-15 | Grounding brush device of alternating current variable frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204509845U CN202374125U (en) | 2011-11-15 | 2011-11-15 | Grounding brush device of alternating current variable frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202374125U true CN202374125U (en) | 2012-08-08 |
Family
ID=46597816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204509845U Expired - Fee Related CN202374125U (en) | 2011-11-15 | 2011-11-15 | Grounding brush device of alternating current variable frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202374125U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403844A (en) * | 2011-11-15 | 2012-04-04 | 中电电机股份有限公司 | Ground brush device of alternating current variable frequency motor |
| CN103683693A (en) * | 2013-12-03 | 2014-03-26 | 枣庄矿业集团新安煤业有限公司 | Motor rotary shaft discharger |
| CN112751443A (en) * | 2019-10-31 | 2021-05-04 | 中车株洲电力机车研究所有限公司 | Motor shaft voltage test structure |
-
2011
- 2011-11-15 CN CN2011204509845U patent/CN202374125U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403844A (en) * | 2011-11-15 | 2012-04-04 | 中电电机股份有限公司 | Ground brush device of alternating current variable frequency motor |
| CN103683693A (en) * | 2013-12-03 | 2014-03-26 | 枣庄矿业集团新安煤业有限公司 | Motor rotary shaft discharger |
| CN112751443A (en) * | 2019-10-31 | 2021-05-04 | 中车株洲电力机车研究所有限公司 | Motor shaft voltage test structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20151115 |
|
| EXPY | Termination of patent right or utility model |