CN205118198U - Gear box lamina tecti labyrinth seal device - Google Patents

Abstract

The utility model relates to a labyrinth sealing device for a gear box top cover plate, which comprises a gear box body, a lower cover plate, an upper cover plate, and a ventilation chimney. Bowl-shaped, the lower end of the lower cover is fixed with the gear box, the upper end of the lower cover is fixed with the upper cover, and the middle of the upper cover is provided with an opening matching the ventilation chimney, and the ventilation chimney is set on the upper part of the upper cover. In this utility model, since the top cover plate on the upper part of the gear box is changed to a laminated and labyrinth form, when the gear rotates at high speed for a long time, the lubricating oil in the box will pass through the labyrinth and ventilate layer by layer when the gear rotates at high speed for a long time, and release heat in time. Preventing the phenomenon of positive pressure in the gearbox body not only meets the sealing requirements of the gearbox during splash lubrication, but also solves the lubricating oil atomization phenomenon.

Description

A labyrinth type sealing device for a gear box top cover

technical field

The utility model relates to a labyrinth sealing device for a gear box top cover plate.

Background technique

At present, the sealing of the narrow gear box top cover is generally to arrange a rubber plate between the gear box and the gear box top cover for sealing. Although there are air holes on the top cover plate to communicate the oil in the box with the outside air, but because the gear box is small and the gears rotate at high speed, the temperature of the oil in the box rises quickly, and the lubricating oil splashes to the top through the high-speed rotating gears. After the cover plate, the oil has no time to dissipate heat, so it is easy to form oil atomization phenomenon, resulting in positive and negative pressure state of the gearbox, and even cause the top cover plate of the gearbox to fly out.

Utility model content

The purpose of the utility model is to overcome the above defects and provide a labyrinth sealing device for the top cover plate of the gearbox to prevent the positive and negative pressure of the gearbox and the atomization of the oil.

The technical scheme of the utility model is: a labyrinth type sealing device for a gear box top cover plate, which includes a gear box body, a lower cover plate, an upper cover plate, and a ventilation chimney, and the lower cover plate is provided with a hollow through hole The bottom of the bowl is upward, the lower end of the lower cover is fixed with the gear box, the upper end of the lower cover is fixed with the upper cover, and the middle part of the upper cover is provided with a ventilation chimney. The opening of the ventilation chimney is arranged on the top of the upper cover plate.

In order to prevent foreign matters from entering the box, partitions with impermeable cross-sections are interlaced inside the ventilation chimney.

In order to facilitate the discharge of gas in the gear box, it also includes a sleeve, three or more sleeves are evenly arranged between the upper cover and the lower cover, the lower part of the sleeve is fixed with the lower cover, The upper part of the sleeve is fixed together with the upper cover plate.

In order to prevent foreign matter from entering the gear box from the gap between the sleeve and the oil in the gear box from splashing, a baffle is also included, and the baffle is arranged at the inner lower end of the upper cover and surrounds A square shape similar to a square gear case.

Preferably, an oil receiving groove is also included, and the oil receiving groove is arranged at the inner lower end of the lower end cover and matches with the lower part of the baffle.

The beneficial technical effect of the utility model is that since the top cover plate on the upper part of the gear box is changed into a laminated and labyrinth form, when the gear rotates at high speed for a long time, the lubricating oil in the box splashes to the top cover through layers of seals, It is breathable, releases heat in time, and prevents the phenomenon of positive pressure in the gearbox body, which not only meets the sealing requirements of the gearbox during splash lubrication, but also solves the problem of lubricating oil atomization.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Referring to the accompanying drawings, a labyrinth type sealing device for a gear box top cover includes a gear box body 6, a lower cover 1, an upper cover 2, and a ventilation chimney 3. The lower cover 1 is provided with a hollow vent The bottom of the hole is bowl-shaped, the lower end of the lower cover plate 1 is fixed with the gear case 6, the upper end of the lower cover plate 1 is fixed with the upper cover plate 2, and the middle part of the upper cover plate 2 is provided There is an opening matching the ventilation chimney 3, the ventilation chimney 3 is arranged on the top of the upper cover plate 2, and the inside of the ventilation chimney 3 is provided with partitions with cross-sections that do not pass through, in order to facilitate the discharge of gas in the gear box body 6, Also includes a sleeve 4, three sleeves 4 are evenly arranged between the upper cover 2 and the lower cover 1, the lower part of the sleeve 4 is fixed with the lower cover 1, the upper part of the sleeve 4 is connected with the upper cover The plates 2 are fixed together, in order to prevent foreign matter from entering the gear case 6 from the gap between the sleeve 4 and the sleeve 4 and prevent the oil in the gear case 6 from splashing out, a baffle 5 is also included. The plate 5 is arranged on the inner lower end of the upper cover plate 2 and surrounds a square similar to the square gear case 6, and also includes an oil receiving groove 7, which is arranged on the inner lower end of the lower end cover 1 and is connected with the baffle plate The lower position of 5 matches, and the oil in the oil receiving groove 7 can lubricate the bearing of the gearbox through a dedicated pipeline.

Claims (5)

1. a gear-box head cover plate labyrinth-type excluder, it comprises gear housing, it is characterized in that, also comprise lower cover plate, upper cover plate, ventilative chimney, described lower cover plate is upward bowl-shape at the bottom of the bowl being provided with hollow bore, and lower end and the gear housing of described lower cover plate are fixed together, and upper end and the upper cover plate of lower cover plate are fixed together, be provided with the opening matched with ventilative chimney at the middle part of upper cover plate, ventilative chimney is arranged on the top of upper cover plate.

2. a kind of gear-box head cover plate labyrinth-type excluder according to claim 1, is characterized in that, the alternate internal of described ventilative chimney is provided with the not through dividing plate in cross section.

3. according to a kind of gear-box head cover plate labyrinth-type excluder according to claim 1 or claim 2, it is characterized in that, also comprise sleeve, the sleeve of more than three or three is evenly arranged between upper cover plate and lower cover plate, bottom and the lower cover plate of described sleeve are fixed together, and top and the upper cover plate of sleeve are fixed together.

4. a kind of gear-box head cover plate labyrinth-type excluder according to claim 3, is characterized in that, also comprise baffle plate, described baffle plate be arranged on upper cover plate lower end in the inner part and surround one similar to square gear housing square.

5. a kind of gear-box head cover plate labyrinth-type excluder according to claim 4, it is characterized in that, also comprise oil-containing groove, described oil-containing groove is arranged on the lower end in the inner part of lower end cap and matches with the lower position of baffle plate.