CN210128064U

CN210128064U - Reduction box sealing end cover for screw conveyer

Info

Publication number: CN210128064U
Application number: CN201920859671.1U
Authority: CN
Inventors: 唐志雄; 曹遂军; 王永成; 唐金良
Original assignee: Zhuhai Hui Gao Machinery Co Ltd
Current assignee: Zhuhai Hui Gao Machinery Co Ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-03-06
Anticipated expiration: 2029-06-10

Abstract

The utility model provides a reducing gear box end cover for screw conveyer, include: the end cover is sleeved on the output shaft and connected with an output connecting flange of the reduction gearbox through bolts, the sealing ring is installed at the joint of the inner side of the end cover and the output shaft, a plurality of felt ash covers arranged side by side are connected to the output shaft and located in the end cover, the ash blocking ring is arranged between every two adjacent felt ash covers, the Teflon ash covers are installed on the outer side of the outermost felt ash cover, and the gland is fixed on the outer side of the end cover through bolts and seals the felt ash covers and the Teflon ash covers in the end cover. This screw conveyer is with reducing gear box end cover has good seal structure, can prevent the loss of lubricating oil, guarantees good lubricated sealed effect.

Description

Reduction box sealing end cover for screw conveyer

Technical Field

The utility model relates to a sealing end cover, concretely relates to reducing gear box sealing end cover for screw conveyer.

Background

When the screw conveyer works, the motor drives the screw mandrel to rotate in a specified direction through the reduction gearbox, and powder materials are conveyed from a low position to a high position. According to different working conditions, the screw conveyer continuously works for a long time, and is also discontinuously and frequently started to work, the quality of powder is difficult to keep consistent, such as temperature and humidity, and sometimes, caking, iron blocks, steel wires and other sundries exist, so the working condition of the screw conveyer is quite severe, the sealing quality of a reduction gearbox output shaft which is in direct contact with the material and has rotary motion is particularly important, the quality of the screw conveyer is directly determined by the quality of a sealing end cover structure, and according to statistics, 50% of faults of the conventional screw conveyer are caused by sealing failure.

An integrated sealing end cover structure commonly adopted on the existing screw conveyor is shown in fig. 1, an output shaft 300 is installed on a reduction gearbox 100, the end part of the output shaft is sealed through an end cover sealing assembly 200, and a felt ash seal 500 after oil immersion is installed in the end cover sealing assembly 200 and attached to the output shaft 300 and used for lubricating the output shaft 300, but the structure mainly has the following defects:

(1) the sealing structure is not arranged in the end cover, so that the oil storage effect is poor, except the oil quantity which can be absorbed by the felt ash seal 500, the redundant oil quantity can be naturally lost, and redundant lubricating oil can be caused to drip from the ash leakage port 400 of the reduction gearbox in serious cases;

(2) when the screw conveyor works, the reduction gearbox output shaft 300 rotates to rub the felt ash seal 500 to generate certain heat, the gear meshing transmission of the reduction gearbox also generates heat, so that the temperature of the reduction gearbox output shaft 300 rises, the oil absorbed by the felt ash seal 500 is further volatilized and lost, the longer the time is, the less the oil is, and the lubricating effect is worse and worse;

(3) the spiral conveyor works continuously for a long time or the temperature of conveyed materials is high, so that the volatilization and loss speed of oil adsorbed by the felt ash seal 500 is higher, and the failure of the sealing structure can be accelerated;

(4) when the felt ash seal 500 is lubricated without oil, the temperature can rise rapidly, so that the felt ash seal 500 becomes hard, is worn or even is burnt, a cavity is formed in the sealing end cover assembly 200, the sealing function is completely ineffective, and the powdery material can flow out from the ash leakage port 400 of the reduction gearbox.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a screw conveyer is with reducing gear box end cover with good seal structure can prevent the loss of lubricating oil, guarantees good lubricated sealed effect.

In order to realize the technical scheme, the utility model provides a reducing gear box end cover for screw conveyer, include: the end cover is sleeved on the output shaft and connected with an output connecting flange of the reduction gearbox through bolts, the sealing ring is installed at the joint of the inner side of the end cover and the output shaft, a plurality of felt ash covers arranged side by side are connected to the output shaft and located in the end cover, the ash blocking ring is arranged between every two adjacent felt ash covers, the Teflon ash covers are installed on the outer side of the outermost felt ash cover, and the gland is fixed on the outer side of the end cover through bolts and seals the felt ash covers and the Teflon ash covers in the end cover.

In above-mentioned technical scheme, through increasing the sealing washer in end cover and the inboard contact department of output shaft for the inside airtight space that forms of end cover, lubricating oil can be stored, prevents that the inside felt ash of end cover from sealing absorbent lubricating oil and running off along the output shaft axial, can guarantee lubricated enough when the reducing gear box output shaft is rotatory, is favorable to reducing the temperature rise that the friction arouses, reaches best sealed effect, extension output shaft life. In addition, through set up the ash blocking ring between the felt ash seals, can guarantee that each felt ash seals the degree of compression in the axial is unanimous basically, can prevent that high-speed rotatory in-process from leading to the lubricating oil in the felt ash seals to be extruded because axial pressure is inconsistent to can improve lubricated and sealed effect.

Preferably, the dust blocking ring is arranged in a T shape, and the T-shaped dust blocking ring is arranged to be tightly attached to the shaft surface of the output shaft, so that the effect of separating felt dust seals can be achieved, and pressure fluctuation of the felt dust seals in the axial direction can be avoided when the output shaft rotates at a high speed.

Preferably, the ash blocking ring is made of stainless steel, an inner hole of the ash blocking ring is in interference fit with an outer circle of the output shaft, and the ash blocking ring always keeps stable and does not move along with the axial position of the output shaft in the high-speed rotation process.

Preferably, the sealing ring is an O-ring.

The utility model provides a pair of reducing gear box end cover for screw conveyer's beneficial effect lies in:

(1) the reduction gearbox sealing end cover for the screw conveyor is simple in structure and good in sealing performance, a sealing ring is additionally arranged at the contact position of the end cover and the inner side of an output shaft, so that a closed space is formed inside the end cover, lubricating oil can be stored, the lubricating oil adsorbed by felt ash in the end cover is prevented from running off along the axial direction of the output shaft, sufficient lubrication can be ensured when the output shaft of the reduction gearbox rotates, the temperature rise caused by friction can be reduced, the optimal sealing effect is achieved, and the service life of the output shaft is prolonged;

(2) this reducing gear box end cover for screw conveyer seals through set up the ash blocking ring between the felt ash, can guarantee that each felt ash seals at axial compression degree unanimous basically, can prevent that high-speed rotatory in-process because axial pressure is inconsistent, leads to the lubricating oil in the felt ash seals to be extruded to can improve lubricated and sealed effect.

Drawings

FIG. 1 is an assembly view of a conventional one-piece end cap structure.

Fig. 2 is a schematic view of the assembly structure of the present invention.

Fig. 3 is an enlarged view of a portion of the structure of fig. 2.

In the figure: 1. a reduction gearbox; 11. an output connection flange; 2. an end cap seal assembly; 21. an end cap; 22. performing ash sealing by using felt; 23. a gland; 24. sealing with Teflon ash; 25. a dust ring; 26. a seal ring; 27. a gland bolt; 28. an end cap bolt; 3. and an output shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.

Example (b): a reduction gearbox sealing end cover for a screw conveyor.

Referring to fig. 2 and 3, a reduction box end sealing cover for a screw conveyor comprises: the end cover 21 is sleeved on the output shaft 3 and connected with the output connecting flange 11 of the reduction gearbox 1 through an end cover bolt 28, the sealing ring 26 is installed at the butt joint of the inner side of the end cover 21 and the output shaft 3, the sealing ring 26 is an O-shaped sealing ring, three felt ash seals 22 arranged side by side are sleeved on the output shaft 3 and located in the end cover 21, the ash blocking ring 25 is arranged between every two adjacent felt ash seals 22, the ash blocking ring 25 is arranged in a T shape, the T-shaped ash blocking ring 25 is arranged close to the axial surface of the output shaft 3, the ash blocking ring 25 is made of stainless steel, the inner hole of the ash blocking ring 25 is in interference fit with the outer circle of the output shaft 3, the axial position of the ash blocking ring 25 is always kept to be stable and not to move in the process of high-speed rotation along with the output shaft 3, and the felt can play a role of separating the ash seals 22 in practice in the structure, the pressure fluctuation of the felt ash seal 22 in the axial direction can be avoided when the output shaft 3 rotates at a high speed, and the lubricating oil in the felt ash seal 22 is prevented from being extruded; the Teflon ash seal 24 is arranged on the outer side of the felt ash seal 22 on the outermost layer, and the gland 23 is fixed on the outer side of the end cover 21 through a gland bolt 27 and seals the felt ash seal 22 and the Teflon ash seal 24 in the end cover 21.

The assembly process of the reduction gearbox sealing end cover assembly 2 for the screw conveyor is as follows:

1. the reduction gearbox 1 is horizontally placed on a workbench, and an output shaft 3 faces upwards;

2. an O-shaped sealing ring 26 is arranged in a groove of the end cover 21, and then the end cover 21 is arranged on an output connecting flange 11 of the reduction gearbox 1 and is locked by bolts;

3. the felt ash seal 22 fully soaked in oil is arranged inside the end cover 21 and is pressed in place by a special tool;

4. sleeving the ash blocking ring 25 on the output shaft 3, and pressing the ash blocking ring 25 in place by using a special tool to ensure that the axial position of the ash blocking ring meets the requirement;

5. another felt gray seal 22 which is fully soaked in oil is arranged inside the end cover 21, and the step 2-5 is repeated until all the felt gray seals 22 are assembled;

6. placing a Teflon ash seal 24 into the end cover 21;

7. finally, the gland 23 is mounted on the end cap 21 and is locked by bolts.

This screw conveyer is with reducing gear box end cover simple structure, sealing performance is good, through increasing sealing washer 26 in

end cover

21 and 3 inboard contact departments of output shaft, make the inside airtight space that forms of end cover 21, lubricating oil can be stored, prevent that the inside felt ash of end cover 21 from sealing 22 absorbent lubricating oil along the 3 axial losses of output shaft, can guarantee lubricated enough when output shaft 3 is rotatory, be favorable to reducing the temperature rise that the friction arouses, reach best sealed effect, extension output shaft 3 life.

This screw conveyer is with reducing gear box end cover can guarantee that each felt ash seals 22 is basically unanimous at axial compressed degree through set up ash blocking ring 25 between felt ash seals 22, can prevent that high-speed rotatory in-process because axial pressure is inconsistent, leads to the lubricating oil in felt ash seals 22 to be extruded to can improve lubricated and sealed effect.

The above description is a preferred embodiment of the present invention, but the present invention should not be limited to the disclosure of the embodiment and the accompanying drawings, and therefore, all equivalents and modifications that can be accomplished without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a reducing gear box end cover for screw conveyer which characterized in that includes: the end cover is sleeved on the output shaft and connected with an output connecting flange of the reduction gearbox through bolts, the sealing ring is installed at the joint of the inner side of the end cover and the output shaft, a plurality of felt ash covers arranged side by side are connected to the output shaft and located in the end cover, the ash blocking ring is arranged between every two adjacent felt ash covers, the Teflon ash covers are installed on the outer side of the outermost felt ash cover, and the gland is fixed on the outer side of the end cover through bolts and seals the felt ash covers and the Teflon ash covers in the end cover.

2. The reduction gearbox end cover for screw conveyor according to claim 1, characterized in that: the dust blocking ring is arranged in a T shape, and the T-shaped dust blocking ring is arranged to be tightly attached to the axial surface of the output shaft.

3. A reduction gearbox end closure for a screw conveyor according to claim 2, characterized in that: the ash blocking ring is made of stainless steel, and an inner hole of the ash blocking ring is in interference fit with the outer circle of the output shaft.

4. The reduction gearbox end cover for screw conveyor according to claim 1, characterized in that: the sealing ring is an O-shaped sealing ring.