CN206164267U - Inserted sealed conducting ring - Google Patents

Abstract

The utility model relates to a mosaic sealing conductive ring, which includes a ring-shaped sealing cover, a ring-shaped sealing member and a ring-shaped conductive member. The contact surface between the sealing cover and the oil seal installation hole is interference fit. Its installation method is a simple press-in scheme, and the sealed conductive ring is embedded on the bearing cover of the variable frequency motor. It also has the characteristics of being light and practical, and integrating sealing and conduction.

Description

Embedded sealing conductive ring

technical field

The utility model relates to a sealed conductive device of a motor, in particular to a sealed conductive device of a variable frequency motor.

Background technique

The bearing of the frequency conversion motor has an oil film, and the shaft voltage generated after the motor frequency conversion will break down the oil film, causing electric corrosion of the bearing of the frequency conversion motor, and causing the motor to fail to operate normally. Therefore, the frequency conversion motor needs to be equipped with a conductive device.

The frequency conversion motor needs to install an oil seal to protect the motor bearing, so the outer cover of the bearing generally has an oil seal installation hole reserved. In the prior art, the integrated device that organically combines the oil seal and the conductive device requires new installation holes on the outer bearing cover, which causes inconvenience in use.

Contents of the invention

The purpose of the invention of the utility model is to provide a mosaic sealing conductive ring in order to overcome the above-mentioned shortcomings of the background technology.

The technical scheme of the utility model is: a mosaic sealing conductive ring, including a ring-shaped sealing cover, a ring-shaped seal and a ring-shaped conductive part, which is characterized in that the ring-shaped sealing cover is embedded in the outer cover of the bearing In the oil seal installation hole, the contact surface between the annular sealing cover and the oil seal installation hole is interference fit.

The ring-shaped inner circumference of the ring-shaped conductive member is interference fit with the motor shaft, the ring-shaped conductive member is a conductive fiber, the thickness of the conductive fiber is 0.5-3mm, and the conductive fiber is evenly bonded to the ring through the conductive glue. on the inner circumference of the shaped sealing cap.

The annular sealing member includes a locking friction plate and a sealing protection member, and the locking friction plate presses the sealing protection member and the conductive fiber on the annular sealing cover.

The sealing protection part is an annular polytetrafluoroethylene sealing protection part, and the lip of the annular polytetrafluoroethylene sealing protection part is in interference fit with the motor shaft to form a radial dynamic seal.

The beneficial effects of the utility model are: the structure of the utility model has dual functions of an oil seal and a conductive ring, the overall shape is adapted to the shape of the oil seal installation hole on the bearing outer cover, and is embedded in the oil seal installation hole on the bearing outer cover, which has the advantages of convenient installation , the advantage of wide adaptability. The structure of the utility model can not only make the motor achieve IP67 protection but also ground the shaft current; it not only saves the cost but also keeps the service life of the bearing long-term.

Description of drawings

Fig. 1 is the sectional view of structure of the present utility model;

Fig. 2 is a structural schematic diagram of the utility model installed on the bearing outer cover;

Among them: 1. Annular sealing cover, 2. Conductive fiber, 3. Inner locking plate, 4. Sealing protection piece, 5. Outer locking friction plate, 6. Motor shaft, 7. Bearing outer cover, 8. Bearing, 9. Oil seal installation hole.

detailed description

As shown in Figure 1 and Figure 2, the embedded sealing conductive ring includes a ring-shaped sealing cover, a ring-shaped seal and a ring-shaped conductive member. The ring-shaped sealing cover (1) is embedded in the outer bearing cover (7) In the oil seal installation hole (9), the contact surface between the annular sealing cover (1) and the oil seal installation hole (9) has an interference fit. The bilateral interference of the contact surface between the annular sealing cover and the oil seal installation hole is 0.05-0.22 mm.

The conductive fiber (2) is evenly bonded to the inner circumference of the ring-shaped sealing cover (1) to form a ring-shaped conductive member through conductive glue. The laying thickness of the conductive fiber (2) is 0.5-3mm. The conductive fiber and the motor shaft (6 ) The amount of interference between 2 ~ 5mm.

The annular seal includes an outer locking friction piece (5), a sealing protection piece (4) and an inner locking piece (3), and the inner locking piece (3) compresses the conductive fiber (2) in the annular On the sealing cover (1), the outer locking friction plate (5) presses the sealing protector (4) onto the inner locking plate (3). The sealing protection (4) is an annular polytetrafluoroethylene sealing protection, and the lip of the annular polytetrafluoroethylene sealing protection is in interference fit with the motor shaft (6) to form a radial dynamic seal.

Laying conductive fibers on the inner circumference of the annular sealing cover (1) will cause unevenness due to error factors, so this defect can be overcome by pressing the inner locking piece (3).

The interference between the lip of the annular polytetrafluoroethylene sealing protector and the motor shaft is 1-3mm.

Claims (6)

1. A mosaic-type sealed conductive ring, including an annular sealing cover, an annular seal and an annular conductive part, is characterized in that the annular sealing cover is embedded in the oil seal mounting hole on the bearing outer cover, and the ring The contact surface between the sealing cover and the oil seal installation hole is interference fit, the annular inner circumference of the ring-shaped conductive part is interference fit with the motor shaft, the ring-shaped conductive part is a conductive fiber, and the thickness of the conductive fiber is 0.5-3mm, the conductive fiber is evenly bonded on the inner circumference of the ring-shaped sealing cover through conductive glue. 2. The embedded sealing conductive ring according to claim 1, characterized in that the annular seal comprises an outer locking friction plate, a sealing protection piece and an inner locking plate, and the inner locking plate compresses the conductive fiber On the annular sealing cover, the outer locking friction plate presses the sealing guard against the inner locking plate. 3. The mosaic sealed conductive ring as claimed in claim 2, characterized in that the sealing protection is an annular polytetrafluoroethylene sealing protection, the lip of the annular polytetrafluoroethylene sealing protection and the motor shaft The interference fit forms a radial dynamic seal. 4. The embedded sealing conductive ring according to claim 1, characterized in that the interference between the conductive fiber and the motor shaft is 2-5mm. 5. The embedded sealing conductive ring according to claim 3, characterized in that the interference between the lip of the annular polytetrafluoroethylene sealing protection member and the motor shaft is 1-3 mm. 6. The embedded sealing conductive ring according to claim 1, characterized in that the bilateral interference of the contact surface between the annular sealing cover and the oil seal installation hole is 0.05-0.22mm.