CN212775560U - Sealing device for large gear of rotary kiln - Google Patents
Sealing device for large gear of rotary kiln Download PDFInfo
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- CN212775560U CN212775560U CN202021016624.XU CN202021016624U CN212775560U CN 212775560 U CN212775560 U CN 212775560U CN 202021016624 U CN202021016624 U CN 202021016624U CN 212775560 U CN212775560 U CN 212775560U
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- sealing ring
- rotary kiln
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Abstract
The utility model provides a sealing device for rotary kiln gear wheel, sealing device comprises sealing part and connecting portion, wherein the whole sealing part is annular and the cover is established on the gear sealing ring, its cross-section is "big" style of calligraphy, including along the main ring of radial setting, along left support ring, the right support ring of axial setting to and the left sealing ring, the right sealing ring of slope setting, connecting portion are fixed in on the gear box, the main ring is fixed with connecting portion and is fixed in on the gear box through connecting portion; the inner circular surfaces of the left sealing ring and the right sealing ring are contacted and sealed with the outer circular surface of the gear sealing ring, and convex sealing lips are arranged on the left sealing ring and the right sealing ring at the positions contacted with the gear sealing ring; two annular spring pieces are arranged in the sealing part. 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
Technical Field
The utility model provides a sealing device especially provides a sealing device for rotary kiln gear wheel, 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, because the large gear ring can stretch and contract 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, the sealing effect of the conventional sealing mode is poor, and grease leakage sometimes occurs.
Disclosure of Invention
The utility model discloses the needle provides a sealing device for rotary kiln gear wheel, and the device can seal in being arranged in the gear wheel of rotary kiln of production usefulness, and its simple structure, leakproofness are good, and life is permanent, the cost of manufacture is lower.
A 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 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 is composed of a sealing part and a connecting part, wherein the sealing part is annular as a whole, is sleeved on the gear sealing ring, has a large-shaped cross section and comprises a main ring arranged along the radial direction, a left supporting ring and a right supporting ring arranged along the axial direction, and a left sealing ring and a right sealing ring which are arranged obliquely; the inner circular surfaces of the left sealing ring and the right sealing ring are contacted and sealed with the outer circular surface of the gear sealing ring, and convex sealing lips are arranged on the left sealing ring and the right sealing ring at the positions contacted with the gear sealing ring; the inside of sealing portion still is provided with two annular spring leafs, is "7" style of calligraphy left spring leaf and the cross-section is anti "7" style of calligraphy right spring leaf for the cross-section respectively, and wherein left spring leaf is located the inside of left support ring and left sealing ring, and left sealing ring is in close contact with gear seal ring under the expansion elasticity of left spring leaf, and right spring leaf is located the inside of right support ring and right sealing ring, and right sealing ring is in close contact with gear seal ring under the expansion elasticity of right spring leaf.
The connecting portion comprises support, L shape briquetting, clamp plate and clamp bolt, the support welded fastening is on the lateral wall of gear box, and the main ring and the right branch stay in the sealing portion lean on the support, and the one end of L shape briquetting is fixed in on the support, and the other end cladding is on the main ring, and clamp bolt passes L shape briquetting and compresses tightly the main ring on the support through the clamp plate.
And the bottom of the main ring is provided with a grease injection hole which is through along the radial direction.
And the top of the main ring is provided with a vent hole which is communicated along the radial direction.
Compared with the prior art, the utility model provides a sealing device has following advantage: 1. the utility model discloses simple structure, through the inseparable laminating of left sealing ring and right sealing ring on the gear sealing ring, can deal with the axial and the radial upward beat that the rotatory process of gear sealing ring takes place. And even if the lip is abraded after long-time use, the top edge of the sealing lip is clung to the gear sealing ring due to the elastic expansion action of the left spring piece and the right spring piece, so that the sealing effect is ensured. 2. And the bottom of the main ring is provided with a grease injection hole which is communicated along the radial direction, and the grease injection hole is used for injecting lubricating grease into the sealing to provide lubrication for the sealing lip. 3. The top of the main ring is provided with a ventilation hole which is communicated along the radial direction, and the ventilation hole is used for receiving energy compressed air (multi-input multi-output) and cooling the sealing part and the gear sealing ring.
Drawings
Fig. 1 is a schematic view of the overall structure of a sealing device for a large gear of a rotary kiln provided by the present invention;
in the figure: 1-a bull gear, 2-a gear box, 3-a gear sealing ring, 4-a sealing cavity, 5-a main ring, 6-a left supporting ring, 7-a right supporting ring, 8-a left sealing ring, 9-a right sealing ring, 10-a sealing lip, 11-a left spring leaf, 12-a right spring leaf, 13-a support, 14-an L-shaped pressing block, 15-a pressing bolt, 16-a grease injection hole, 17-a ventilation hole and 18-a pressing plate.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a sealing device's structure for rotary kiln gear wheel is shown in FIG. 1, installs between gear box 2 and gear sealing ring 3, gear wheel 1 is located the inside of gear box, and on the one end of gear sealing ring was fixed in the side of gear wheel and with gear wheel synchronous revolution, the other end of gear sealing ring stretches out from the gear box, and the gear sealing ring is for the rotatory and clearance between the two of gear box be sealed chamber.
The sealing device consists of a sealing part and a connecting part, wherein the sealing part is annular as a whole and is sleeved on the gear sealing ring, the cross section of the sealing part is in a large shape and comprises a main ring 5 arranged along the radial direction, a left supporting ring 6 and a right supporting ring 7 arranged along the axial direction, and a left sealing ring 8 and a right sealing ring 9 which are arranged obliquely, the connecting part is fixed on the gear box, and the main ring and the connecting part are fixed and are fixed on the gear box through the connecting part; the connecting part consists of a support 13, an L-shaped pressing block 14, a pressing plate 18 and a pressing bolt 15, the support is fixed on the side wall of the gear box in a welding mode, a main ring and a right support ring in the sealing part are attached to the support, one end of the L-shaped pressing block is fixed on the support, the other end of the L-shaped pressing block is coated on the main ring, and the pressing bolt penetrates through the L-shaped pressing block and presses the main ring on the support through the pressing plate.
The inner circular surfaces of the left sealing ring and the right sealing ring are contacted and sealed with the outer circular surface of the gear sealing ring, and convex sealing lips 10 are arranged on the left sealing ring and the right sealing ring at the positions contacted with the gear sealing ring; the inside of sealing portion still is provided with two annular spring leafs, is "7" style of calligraphy left spring leaf 11 and the cross-section is anti "7" style of calligraphy right spring leaf 12 for the cross-section respectively, and wherein left spring leaf is located the inside of left support ring and left sealing ring, and left sealing ring is in close contact with gear seal ring under the expansion elasticity of left spring leaf, and right spring leaf is located the inside of right support ring and right sealing ring, and right sealing ring is in close contact with gear seal ring under the expansion elasticity of right spring leaf. Even if the lip is abraded after long-time use, the top edge of the sealing lip is clung to the gear sealing ring due to the elastic expansion effect of the left spring piece and the right spring piece, and therefore the sealing effect is guaranteed.
And the bottom of the main ring is provided with a grease injection hole 16 which is penetrated along the radial direction and is used for injecting lubricating grease into the sealing to provide lubrication for the sealing lip. The top of the main ring is provided with a vent hole 17 which is communicated along the radial direction and is used for receiving energy compressed air (multi-inlet multi-outlet) to cool the sealing part and the gear sealing ring.
Claims (4)
1. A 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 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 is composed of a sealing part and a connecting part, wherein the sealing part is annular as a whole, is sleeved on the gear sealing ring, has a large-shaped cross section and comprises a main ring arranged along the radial direction, a left supporting ring and a right supporting ring arranged along the axial direction, and a left sealing ring and a right sealing ring which are arranged obliquely; the inner circular surfaces of the left sealing ring and the right sealing ring are contacted and sealed with the outer circular surface of the gear sealing ring, and convex sealing lips are arranged on the left sealing ring and the right sealing ring at the positions contacted with the gear sealing ring; the inside of sealing portion still is provided with two annular spring leafs, is "7" style of calligraphy left spring leaf and the cross-section is anti "7" style of calligraphy right spring leaf for the cross-section respectively, and wherein left spring leaf is located the inside of left support ring and left sealing ring, and left sealing ring is in close contact with gear seal ring under the expansion elasticity of left spring leaf, and right spring leaf is located the inside of right support ring and right sealing ring, and right sealing ring is in close contact with gear seal ring under the expansion elasticity of right spring leaf.
2. The sealing device for the large gear of the rotary kiln as claimed in claim 1, wherein: the connecting portion comprises support, L shape briquetting, clamp plate and clamp bolt, the support welded fastening is on the lateral wall of gear box, and the main ring and the right branch stay in the sealing portion lean on the support, and the one end of L shape briquetting is fixed in on the support, and the other end cladding is on the main ring, and clamp bolt passes L shape briquetting and compresses tightly the main ring on the support through the clamp plate.
3. The sealing device for the large gear of the rotary kiln as claimed in claim 1, wherein: and the bottom of the main ring is provided with a grease injection hole which is through along the radial direction.
4. The sealing device for the large gear of the rotary kiln as claimed in claim 1, wherein: and the top of the main ring is provided with a vent hole which is communicated along the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021016624.XU CN212775560U (en) | 2020-06-05 | 2020-06-05 | Sealing device for large gear of rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021016624.XU CN212775560U (en) | 2020-06-05 | 2020-06-05 | Sealing device for large gear of rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212775560U true CN212775560U (en) | 2021-03-23 |
Family
ID=75069738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021016624.XU Active CN212775560U (en) | 2020-06-05 | 2020-06-05 | Sealing device for large gear of rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212775560U (en) |
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2020
- 2020-06-05 CN CN202021016624.XU patent/CN212775560U/en active Active
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