CN206582326U - A kind of gas-insulated switchgear rotary sealing appts - Google Patents

Abstract

The utility model discloses a rotary sealing device for gas insulated switchgear, which comprises a sealing rotating shaft and a sealing flange cover sleeved on the outside of the sealing rotating shaft, and a skeleton oil seal and a deep groove ball are arranged between the sealing flange cover and the sealing rotating shaft Bearing, the end of the sealed shaft is provided with a boss, the inner side of the sealing flange cover is provided with a positioning groove, and an O-shaped sealing ring is arranged in the positioning groove, and the O-shaped sealing ring is in contact with the outer side of the sealed rotating shaft. The structure is simple and reasonable , The cost is moderate, and it can meet the requirements of dynamic seal for rotation and static seal for installation in inflatable cabinet products.

Description

A rotary sealing device for gas insulated switchgear

technical field

The utility model relates to the field of power transmission and distribution equipment, in particular to a rotary sealing device for gas insulated switchgear.

Background technique

The connection between the circuit breaker in the inflatable cabinet and the operating mechanism outside the cabinet requires a good static seal for installation, and an airtight treatment for the dynamic seal during movement and rotation, so as to ensure that the gas inside the gas tank will not be affected by installation and transportation when the product is running. Or operation and cause leakage; At present, the O-ring has a good static sealing effect and a long life; if only the O-ring is used for dynamic sealing, although the cost is low, it is limited by the speed and pressure of the seal, and its effect is poor. Short life, easy to leak; floating ring seals, dry gas seals, magnetic fluid seals and other actuating seals have good effect and long life, but the cost is high.

Utility model content

The technical problem to be solved by the utility model is to provide a rotary sealing device for gas insulated switchgear, which has a simple and reasonable structure, moderate cost, and can meet the requirements of dynamic sealing for rotation and static sealing for installation in inflatable cabinet products, so as to solve the current There are above-mentioned multiple defects that cause in the technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a rotary sealing device for gas insulated switchgear, including a sealing shaft and a sealing flange cover on the outside of the sealing shaft, the sealing flange cover and the sealing shaft Skeleton oil seal and deep groove ball bearing are arranged between, the end of the sealed shaft is provided with a boss, the inner side of the sealing flange cover is provided with a positioning groove, and an O-ring is arranged in the positioning groove, and the O-ring is connected with the seal The outer sides of the shaft are in contact.

Preferably, the inner side of the sealing flange cover is provided with a cylindrical stepped inner groove, including a first-level inner groove and a second-level inner groove, the diameter of the second-level inner groove is larger than the diameter of the first-level inner groove, and the skeleton oil seal is arranged In the inner groove, deep groove ball bearings are arranged in the inner side of the second stage.

Preferably, retaining rings are provided on both sides of the deep groove ball bearing.

Preferably, the edge of the secondary inner groove is provided with a clamping groove, and the retaining ring is clamped in the clamping groove.

Preferably, the outer side of the sealing flange cover is provided with an annular groove, and the O-ring is arranged in the annular groove.

Preferably, the end of the sealed rotating shaft is a hexagonal joint.

The beneficial effects of adopting the above technical solutions are: the rotary sealing device for gas insulated switchgear with the structure of the utility model adopts an O-shaped sealing ring as a static seal, and the cost is low; the structural characteristics of the skeleton oil seal include a reinforced skeleton and a self-tightening coil spring. Skeleton oil seal and O-shaped sealing ring are used for dynamic sealing, which can meet the requirements of use, and the cost is moderate; deep groove ball bearings are used, and the supporting and self-aligning function can reduce the influence of the radial force of the rotating shaft on the oil seal and sealing ring, and improve the sealing life. ;Adopt the hexagonal interface, which can meet the torque and installation requirements of the inner and outer connections of the sealed box.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a side view of the utility model;

Fig. 3 is a structural schematic diagram of the sealing flange cover.

Among them, 1--sealed shaft, 2--retaining ring, 3--deep groove ball bearing, 4--O-type sealing ring, 5--skeleton oil seal, 6--sealed flange cover, 7--hexagonal interface , 8--annular groove, 9--card slot, 10--first-level inner groove, 11--second-level inner groove, 12--positioning groove, 13--boss.

detailed description

Preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

Figure 1, Figure 2 and Figure 3 show the specific implementation of the present utility model: a rotary sealing device for gas insulated switchgear, including a sealing shaft 1 and a sealing flange cover 6 sleeved on the outside of the sealing shaft 1, the sealing method A skeleton oil seal 5 and a deep groove ball bearing 3 are arranged between the flange cover 6 and the sealing shaft 1, the end of the sealing shaft 1 is provided with a boss 13, and the inner side of the sealing flange cover 6 is provided with a positioning groove 12, and the positioning groove 12 is provided with an O-shaped sealing ring 4, and the O-shaped sealing ring 4 is in contact with the outer side of the sealing rotating shaft 1.

The inner side of the sealing flange cover 6 is provided with a cylindrical stepped inner groove, including a first-level inner groove 10 and a second-level inner groove 11. The diameter of the second-level inner groove 11 is larger than the diameter of the first-level inner groove 10. In the inner groove 10 of the first stage, the deep groove ball bearing 3 is arranged in the inner side of the second stage; the two sides of the deep groove ball bearing 3 are provided with retaining rings 2; 2 is stuck in the card groove 9; the outer side of the sealing flange cover 6 is provided with an annular groove 8, and the O-ring 4 is arranged in the annular groove 8; the end of the sealing shaft 1 is a hexagonal interface 7.

The rotary sealing device for gas insulated switchgear with the structure of the utility model adopts an O-shaped sealing ring as a static seal, and the cost is low; the structural features of the skeleton oil seal include a reinforced skeleton and a self-tightening spiral spring. Skeleton oil seal and O-shaped sealing ring are used for dynamic sealing, which can meet the requirements of use, and the cost is moderate; deep groove ball bearings are used, and the supporting and self-aligning function can reduce the influence of the radial force of the rotating shaft on the oil seal and sealing ring, and improve the sealing life. ;Adopt the hexagonal interface, which can meet the torque and installation requirements of the inner and outer connections of the sealed box.

The above is only the preferred embodiment of the utility model, it should be pointed out that, for those of ordinary skill in the art, without departing from the inventive concept of the utility model, some deformations and improvements can also be made. Belong to the protection scope of the utility model.

Claims (6)

1. A rotary sealing device for gas insulated switchgear, characterized in that it includes a sealing shaft and a sealing flange cover set outside the sealing shaft, and a skeleton oil seal and a deep groove are arranged between the sealing flange cover and the sealing shaft For ball bearings, the end of the sealed shaft is provided with a boss, and the inside of the sealing flange cover is provided with a positioning groove, and an O-shaped sealing ring is arranged in the positioning groove, and the O-shaped sealing ring is in contact with the outside of the sealed rotating shaft. 2. The rotary sealing device for gas insulated switchgear according to claim 1, characterized in that, the inner side of the sealing flange cover is provided with a cylindrical stepped inner groove, including a first-level inner groove and a second-level inner groove, two The diameter of the inner groove of the first stage is larger than that of the inner groove of the first stage, the skeleton oil seal is arranged in the inner groove of the first stage, and the deep groove ball bearing is arranged in the inner side of the second stage. 3. The rotary sealing device for gas insulated switchgear according to claim 2, characterized in that retaining rings are provided on both sides of the deep groove ball bearing. 4 . The rotary sealing device for gas insulated switchgear according to claim 3 , wherein a locking groove is provided on the edge of the secondary inner groove, and the retaining ring is locked in the locking groove. 5 . 5 . The rotary sealing device for gas insulated switchgear according to claim 1 , wherein an annular groove is provided on the outer side of the sealing flange cover, and an O-ring is arranged in the annular groove. 6 . 6 . The rotary sealing device for gas insulated switchgear according to claim 1 , wherein the end of the sealing shaft is a hexagonal joint.