CN213575533U

CN213575533U - Labyrinth sealing device for large gear of rotary kiln

Info

Publication number: CN213575533U
Application number: CN202022134446.7U
Authority: CN
Inventors: 刘欣; 刘丽霞
Original assignee: Wuhan Xinzhi Sealing Technology Co ltd
Current assignee: Wuhan Xinzhi Sealing Technology Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-06-29
Anticipated expiration: 2030-09-25

Abstract

The utility model provides a labyrinth sealing device for a large gear of a rotary kiln, which comprises a movable ring and a static ring, wherein the section of the static ring is L-shaped, the static ring comprises a static connecting ring arranged along the radial direction and a main static ring arranged along the axial direction, the static connecting ring is attached to the side wall of a gear box, and a pressing block and a bolt are arranged on the side wall of the box body; the main static ring extends into the gear box from the opening of the gear box, oil retainer rings are arranged on the inner circular surface and the outer circular surface of the right end of the main static ring, and an inclined sealing lip is arranged on the outer circular surface of the left end of the main static ring; the section of the rotating ring is reverse C-shaped, the rotating ring comprises a rotating connecting ring arranged along the radial direction, an inner rotating ring and an outer rotating ring arranged along the axial direction, oil slingers are arranged on the inner circular surface of the outer rotating ring and the outer circular surface of the inner rotating ring, and oil slingers are arranged on the outer circular surface of the outer rotating ring. The device can seal in being used for the gear wheel on the rotary kiln of production usefulness, and its simple structure, leakproofness are good, and long service life, cost of manufacture are lower.

Description

Labyrinth sealing device for large gear of rotary kiln

Technical Field

The utility model provides a sealing device especially provides a carry out sealed device in the gear wheel that is used for the rotary kiln of cement manufacture usefulness, belongs to mechanical seal technical field.

Background

The rotary kiln is a rotary calcining kiln (commonly called rotary kiln), the shape of which is similar to that of a rotary bed, also called rotary bed kiln, and belongs to the building material equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the different materials to be treated. The cement kiln is mainly used for calcining cement clinker and comprises a dry-process cement kiln and a wet-process cement kiln. The metallurgical chemical kiln is mainly used for magnetizing and roasting lean iron ore in steel plants in the metallurgical industry; oxidizing and roasting chromium and nickel iron ores; roasting bauxite in a refractory material plant, roasting clinker in an aluminum plant and aluminum hydroxide; roasting chromium ore sand, chromium ore powder and other minerals in a chemical plant. Lime kilns (i.e., active lime kilns) are used for roasting active lime and lightly calcined dolomite used in steel plants and iron and alloy plants.

The large gear wheel (large gear ring) of the rotary kiln is arranged on the rotary kiln cylinder body, transmits the power of the transmission part to the cylinder body, is one of the largest stress parts in rotary kiln equipment, is generally arranged at the position close to a retaining wheel and a supporting wheel, is connected with the cylinder body by adopting a welded spring plate or a pin shaft type spring plate, and can play a role of buffering to protect a gear and a gearbox. The material is ZG45#, and few ZG35CrMo and ZG42CrMo are selected, the normalizing temperature is 850-900 ℃, and the material is discharged from a furnace and cooled in air. The tempering temperature is 680-700 ℃, the product is discharged from the furnace and air-cooled, and the hardness of the finished product is not lower than HB 170. The processing of the casting strictly conforms to the national standard, the casting blank has no cracks, and the surface of the casting blank has no casting defects such as obvious air holes, sand holes and the like.

Because the large gear of the rotary kiln rotates mechanically, lubricating grease in the large gear of the rotary kiln is usually sealed by adopting a gear ring sealing ring and felt sealing mode at present, so that the grease is prevented from leaking. Then, the large gear ring can stretch out and draw back along with the kiln body due to thermal expansion, the stretching amount is more than +/-100 mm, the temperature of the gear ring sealing ring exceeds 100 ℃, and the roundness deviation of the gear ring sealing ring is influenced by thermal expansion and cold contraction, so that the sealing effect of the conventional sealing mode is poor, and the grease leakage sometimes occurs.

Disclosure of Invention

The utility model discloses the needle provides a labyrinth seal device for rotary kiln gear wheel, and the device can seal in being arranged in the gear wheel on the rotary kiln of production usefulness, and its simple structure, leakproofness are good, and life is permanent, the cost of manufacture is lower.

Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:

a labyrinth sealing device for a large gear of a rotary kiln is arranged between a gear box and a gear sealing ring, the large gear is positioned in the gear box, one end of the gear sealing ring is fixed on the side surface of the large gear and rotates synchronously with the large gear, the other end of the gear sealing ring extends out of an opening of the gear box, the gear sealing ring rotates relative to the gear box, and a gap between the gear sealing ring and the gear box is a sealing cavity;

the sealing device comprises a movable ring and a static ring, the section of the static ring is L-shaped, the static ring comprises a static connecting ring arranged along the radial direction and a main static ring arranged along the axial direction, the static connecting ring is attached to the side wall of the gear box, a pressing block and a bolt are arranged on the side wall of the box body, and the bolt penetrates through the pressing block, the static connecting ring and the side wall of the gear box to be fixed; the main static ring extends into the gear box from the opening of the gear box, oil retainer rings are arranged on the inner circular surface and the outer circular surface of the right end of the main static ring, an inclined sealing lip is arranged on the outer circular surface of the left end of the main static ring, and the inner edge of the sealing lip is in contact with and sealed with the outer circular surface of the gear sealing ring; the section of rotating ring is reverse C type, including along the interior rotating ring, the outer rotating ring that radially sets up moving-connecting ring and set up along the axial, wherein moving-connecting ring pastes and leans on the lateral wall of gear wheel and fixes through bolted connection, the outer rotating ring overlaps on main stationary ring, and interior rotating ring overlaps on the gear seal ring, is provided with the oil scraper ring on the interior disc of outer rotating ring and the excircle face of interior rotating ring, is provided with the flinger on the excircle face of outer rotating ring, forms labyrinth seal chamber between rotating ring and the stationary ring jointly.

The gear sealing ring is characterized by also comprising an elastic sealing part, wherein the elastic sealing part is annular as a whole and is sleeved on the gear sealing ring and comprises a positioning step arranged along the radial direction and a main ring arranged along the axial direction, the positioning step is attached to the side wall of the gear box and is fixed by a pressing block and a bolt, the inner circular surface of the main ring is provided with a dust-proof lip and a sealing lip with the splayed cross sections, and more than one dust-proof lip and more than one sealing lip are arranged; the inner edges of the dust lip and the sealing lip are contacted and sealed with the outer circular surface of the gear sealing ring.

A convex spring groove is formed in the outer circular surface of the main ring, and an annular tightening spring is installed in the spring groove.

And a through oil return groove is formed in the bottom of the static ring.

And a through guide groove is arranged in the oil blocking ring on the movable ring.

Compared with the prior art, the utility model provides a sealing device has following advantage: 1. the utility model discloses simple structure mutually supports the labyrinth seal chamber that forms through rotating ring and quiet ring, can prevent leaking of grease, and oil gallery and the guiding gutter that sets up in rotating ring and the quiet ring can further make the grease backward flow simultaneously. 2. The utility model provides an elastic sealing portion can be further form sealedly with gear seal ring's outer disc, and this position is cramped on gear seal ring through cramping the spring simultaneously, even if the beat has taken place in the rotation of working process gear wheel, also can guarantee that elastic sealing portion cramps and guarantees sealed effect on gear seal ring.

Drawings

FIG. 1 is a schematic view of the overall structure of a labyrinth sealing device for a large gear of a rotary kiln provided in embodiment 1;

FIG. 2 is a schematic view of the overall structure of the labyrinth sealing device for the large gear of the rotary kiln provided in embodiment 2;

in the figure: 1-a large gear, 2-a gear box, 3-a gear sealing ring, 4-a sealing cavity, 5-a main ring, 6-a positioning step, 7-a dust lip, 8-a sealing lip, 9-a static connecting ring, 10-a main static ring, 11-a pressing block, 12-an oil retainer, 13-a dynamic connecting ring, 14-an external dynamic ring, 15-an oil thrower, 16-a spring groove, 17-a hooping spring, 18-an oil return groove, 19-a diversion groove and 20-an internal dynamic ring.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Example 1

The labyrinth sealing device for the large gear of the rotary kiln is structurally shown in fig. 1, the labyrinth sealing device is installed between a gear box 2 and a gear sealing ring 3, the large gear 1 is located inside the gear box, one end of the gear sealing ring is fixed on the side surface of the large gear and rotates synchronously with the large gear, the other end of the gear sealing ring extends out of an opening of the gear box, the gear sealing ring rotates relative to the gear box, and a gap between the gear sealing ring and the gear box is a sealing cavity 4.

The sealing device comprises a movable ring and a static ring, the section of the static ring is L-shaped, the static ring comprises a static connecting ring 9 arranged along the radial direction and a main static ring 10 arranged along the axial direction, the static connecting ring is attached to the side wall of the gear box, a pressing block 11 and a bolt are arranged on the side wall of the box body, and the bolt sequentially penetrates through the pressing block, the static connecting ring and the side wall of the gear box to be fixed; the main stationary ring extends into the gear box from the opening of the gear box, and oil slingers 12 are arranged on the inner circular surface and the outer circular surface of the right end of the main stationary ring; an inclined sealing lip 8 is arranged on the outer circular surface of the left end of the main static ring, and the inner edge of the sealing lip is in contact with and seals the outer circular surface of the gear sealing ring. The section of rotating ring is reverse C type, including along the radial moving connecting ring 13 that sets up and along the inner rotating ring 20, outer rotating ring 14 that the axial set up, wherein move the connecting ring and lean on the lateral wall of gear wheel and fixed through bolted connection, the outer rotating ring overlaps on main quiet ring, and the inner rotating ring overlaps on the gear seal ring, is provided with oil scraper ring 15 on the interior disc of outer rotating ring and the excircle face of inner rotating ring, is provided with the flinger on the excircle face of outer rotating ring, is provided with through-going guiding gutter 19 in the oil scraper ring on the rotating ring. Labyrinth seal portion passes through the labyrinth seal chamber that rotating ring and quiet ring mutually supported and form in this embodiment, can prevent leaking of the grease of the overwhelming majority, and the sealing that forms is contacted with the outer disc of seal lip and gear seal ring in addition, can form good sealed effect, and the guiding gutter that sets up in the rotating ring simultaneously can make and carry out the grease backward flow in the labyrinth seal intracavity.

Example 2

The labyrinth sealing device for the large gear of the rotary kiln is structurally shown in figure 2, the main structure of the labyrinth sealing device is the same as that in embodiment 1, and the labyrinth sealing device is characterized in that an elastic sealing part is further arranged in the embodiment, wherein the elastic sealing part is integrally annular and sleeved on a gear sealing ring and comprises a positioning step 6 arranged along the radial direction and a main ring 5 arranged along the axial direction, the positioning step is attached to the side wall of a gear box and fixed through a pressing block and a bolt, a dust lip 7 and a sealing lip 8 with the splayed cross sections are arranged on the inner circular surface of the main ring, and more than one dust lip and one sealing lip are arranged; the inner edges of the dust lip and the sealing lip are contacted and sealed with the outer circular surface of the gear sealing ring; the outer circular surface of the main ring is provided with a convex spring groove 16, an annular tightening spring 17 is installed in the spring groove, the elastic sealing part is tightened on the gear sealing ring through the tightening spring, and even if deflection occurs in rotation of the large gear in the working process, the elastic sealing part can be guaranteed to be tightened on the gear sealing ring to guarantee sealing effect. In the present embodiment, a through oil return groove 18 is provided in the bottom of the stationary ring. The oil return groove can be mutually matched with a flow guide groove arranged in the movable ring, and grease in the labyrinth seal cavity is further promoted to flow back.

Claims

1. A labyrinth sealing device for a large gear of a rotary kiln is arranged between a gear box and a gear sealing ring, the large gear is positioned in the gear box, one end of the gear sealing ring is fixed on the side surface of the large gear and rotates synchronously with the large gear, the other end of the gear sealing ring extends out of an opening of the gear box, the gear sealing ring rotates relative to the gear box, and a gap between the gear sealing ring and the gear box is a sealing cavity;

the method is characterized in that: the sealing device comprises a movable ring and a static ring, the section of the static ring is L-shaped, the static ring comprises a static connecting ring arranged along the radial direction and a main static ring arranged along the axial direction, the static connecting ring is attached to the side wall of the gear box, a pressing block and a bolt are arranged on the side wall of the box body, and the bolt penetrates through the pressing block, the static connecting ring and the side wall of the gear box to be fixed; the main static ring extends into the gear box from the opening of the gear box, oil retainer rings are arranged on the inner circular surface and the outer circular surface of the right end of the main static ring, an inclined sealing lip is arranged on the outer circular surface of the left end of the main static ring, and the inner edge of the sealing lip is in contact with and sealed with the outer circular surface of the gear sealing ring; the section of rotating ring is reverse C type, including along the interior rotating ring, the outer rotating ring that radially sets up moving-connecting ring and set up along the axial, wherein moving-connecting ring pastes and leans on the lateral wall of gear wheel and fixes through bolted connection, the outer rotating ring overlaps on main stationary ring, and interior rotating ring overlaps on the gear seal ring, is provided with the oil scraper ring on the interior disc of outer rotating ring and the excircle face of interior rotating ring, is provided with the flinger on the excircle face of outer rotating ring, forms labyrinth seal chamber between rotating ring and the stationary ring jointly.

2. The labyrinth sealing device for the large gear of the rotary kiln as recited in claim 1, wherein: the gear sealing ring is characterized by also comprising an elastic sealing part, wherein the elastic sealing part is annular as a whole and is sleeved on the gear sealing ring and comprises a positioning step arranged along the radial direction and a main ring arranged along the axial direction, the positioning step is attached to the side wall of the gear box and is fixed by a pressing block and a bolt, the inner circular surface of the main ring is provided with a dust-proof lip and a sealing lip with the splayed cross sections, and more than one dust-proof lip and more than one sealing lip are arranged; the inner edges of the dust lip and the sealing lip are contacted and sealed with the outer circular surface of the gear sealing ring.

3. The labyrinth sealing device for the large gear of the rotary kiln as recited in claim 2, wherein: a convex spring groove is formed in the outer circular surface of the main ring, and an annular tightening spring is installed in the spring groove.

4. The labyrinth sealing device for the large gear of the rotary kiln as recited in claim 2, wherein: and a through oil return groove is formed in the bottom of the static ring.

5. The labyrinth sealing device for the large gear of the rotary kiln as recited in claim 1, wherein: and a through guide groove is arranged in the oil blocking ring on the movable ring.