CN212455495U - Gear shaft sealing mechanism for dynamic separator of medium-speed coal mill - Google Patents

Abstract

The utility model relates to a gear shaft sealing mechanism for a dynamic separator of a medium speed coal mill, which relates to a gear shaft sealing mechanism, and aims to solve the problems that after the prior medium speed coal mill works for a period of time, a sealing ring at the upper part of a pinion shaft can generate oil vapor leakage, and oil vapor is condensed to form oil liquid, so that oil leakage is generated, the gear shaft sealing mechanism comprises a gear shaft, a sealing ring, an impeller component, a positioning sleeve, a motor fixing box body, a gear mounting sealing box body and a bearing, the other end of the gear shaft is rotatably connected and mounted on the gear mounting sealing box body through a bearing, the joint of the gear shaft and the motor fixing box body is provided with another bearing, the bearing is sleeved on the gear shaft, one end of the bearing is provided with the sealing ring, the other end of the bearing is provided with the, the fixed suit of position sleeve is on the gear shaft, the utility model is used for the sealed field of coal pulverizer dynamic separator.

Description

Gear shaft sealing mechanism for dynamic separator of medium-speed coal mill

Technical Field

The utility model relates to a gear shaft sealing mechanism, concretely relates to gear shaft sealing mechanism for medium speed pulverizer dynamic separator.

Background

Coal mills are machines for breaking up and grinding coal briquettes into coal dust, which are important auxiliary equipment for coal dust furnaces. The medium-speed coal mill is suitable for the powdering and milling operation of medium-hardness materials such as soft coal and lean coal, and can be widely applied to powder-making systems in the industries of electric power, metallurgy, building materials, chemical industry and the like, particularly to a blast furnace coal-injection powder-making system which needs to use a large amount of soft coal. The medium-speed coal mill is a coal mill with the working speed of 50-300 r/min, belongs to professional equipment for processing coal-to-liquid coal powder, and can provide qualified coal powder for coal-to-liquid coal. The medium-speed coal mill has the characteristics of compact structure, low metal consumption, small occupied area, low initial investment, low power consumption in operation and the like; especially, the unit coal grinding power consumption is not increased much at low load, the noise is small, and the uniformity of the coal powder is good. When the pinion shaft of the driving part of the dynamic separator of the medium-speed coal mill in the prior art works, the pinion shaft rotates clockwise at the same rotating speed as that of the motor, and during work, oil liquid in a box body and sealing air enters the box body due to leakage of sealing rings at other parts and the like continuously evaporates into oil vapor to form saturated vapor pressure, so that the pressure inside the box body is higher than the pressure outside the box body. Because the pressure in the box is higher than the pressure outside the box, after working for a period of time, because reasons such as mechanical wear, the sealing washer on the upper portion of the pinion shaft can produce oil vapor leakage, and oil leakage phenomenon can be produced to the formation fluid after oil vapor condenses.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve present medium speed pulverizer work a period back pinion shaft upper portion's sealing washer and will produce oily steam leakage, form the problem that fluid produced the oil leak phenomenon promptly after oily steam condenses, and then provide a gear shaft sealing mechanism for medium speed pulverizer dynamic separator.

The utility model discloses a solve above-mentioned problem and the technical scheme who adopts is:

the device comprises a gear shaft, a sealing ring, an impeller component, a locating sleeve, a motor fixing box body, a gear mounting sealing box body and two bearings, wherein the motor fixing box body is fixedly connected with the gear mounting sealing box body, the gear shaft is inserted on the motor fixing box body and the gear mounting sealing box body, a shell of a driving motor is fixedly mounted on the motor fixing box body, the output end of a rotating shaft of the driving motor is fixedly connected with one end of the gear shaft, the other end of the gear shaft is rotatably connected and mounted on the gear mounting sealing box body through one bearing, the other bearing is arranged at the joint of the gear shaft and the motor fixing box body, the bearing is sleeved on the gear shaft, the sealing ring is arranged at one, and the sealing ring and the impeller assembly are sleeved on the gear shaft, a positioning sleeve is arranged on the gear shaft close to the impeller assembly, and the positioning sleeve is fixedly sleeved on the gear shaft.

The utility model has the advantages that:

1. mechanism through this application has reduced the oil leak of medium speed coal pulverizer dynamic separator pinion shaft upper portion sealing washer, prolongs the life of sealing washer simultaneously, reduces the change number of times of sealing washer, reduces maintenance cost, improves the work efficiency of coal pulverizer rotating separation ware drive division, improves coal pulverizer rotating separation ware operation safety, stability, improves coal pulverizer dynamic separator's work efficiency.

2. When the centrifugal impeller is operated, the impeller and the pinion shaft rotate together clockwise, the impeller is provided with the blades, when the impeller rotates clockwise, centrifugal force is generated, oil vapor is thrown to the outer ring of the impeller from the middle part of the impeller under the action of the centrifugal force, and after the oil vapor in the middle part of the impeller is thrown out, a low-pressure area or vacuum is formed in the middle part of the impeller (the pressure of the formed low-pressure area is lower when the rotating speed is higher relative to the rotating speed of the pinion shaft), so that the pressure in the middle part of the impeller assembly 3, which is inserted in the outer side wall of the motor fixing box body 5, of the pinion shaft is lower than that of the impeller assembly 3 when the impeller assembly 3 is not installed, the pressure in the part and the pressure difference outside the gear; when the pressure of the part is negative pressure, the pressure of the part is lower than the external pressure of the gear installation sealing box body 6, so that the leakage amount of oil vapor is zero, namely, the oil is not leaked, and the oil leakage or the oil leakage at the sealing ring of the pinion shaft is reduced.

3. After the pinion sealing mechanism of the driving part of the dynamic separator of the medium-speed coal mill is adopted, the problem of oil leakage at the sealing ring of the pinion shaft of the driving part of the rotary separator of the coal mill is solved, the service life of the sealing ring is prolonged, the replacement times of the sealing ring are reduced, the maintenance cost is reduced, the working efficiency of the driving part of the rotary separator of the coal mill is improved, the dynamic separator of the coal mill runs more stably, safely and reliably, and the economic benefit is remarkable.

Drawings

Fig. 1 is a schematic structural diagram of the present application.

Fig. 2 is a view from B-B in fig. 1.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1-2, and the embodiment describes a gear shaft sealing mechanism for a dynamic separator of a medium speed coal mill, which comprises a gear shaft 1, a sealing ring 2, an impeller assembly 3, a positioning sleeve 4, a motor fixing box 5, a gear mounting sealing box 6 and two bearings, wherein the motor fixing box 5 is fixedly connected with the gear mounting sealing box 6, the gear shaft 1 is inserted into the motor fixing box 5 and the gear mounting sealing box 6, a shell of a driving motor is fixedly mounted on the motor fixing box 5, an output end of a rotating shaft of the driving motor is fixedly connected with one end of the gear shaft 1, the other end of the gear shaft 1 is rotatably connected and mounted on the gear mounting sealing box 6 through one bearing, another bearing is arranged at the joint of the gear shaft 1 and the motor fixing box 5, the bearing is sleeved on the gear shaft 1, and one end of the bearing is provided, the other end of bearing is equipped with impeller subassembly 3, and sealing washer 2 and impeller subassembly 3 all suit are on gear shaft 1, and the department that is close to impeller subassembly 3 on the gear shaft 1 is equipped with position sleeve 4, and position sleeve 4 fixed suit is on gear shaft 1.

The second embodiment is as follows: the embodiment is described in conjunction with fig. 1-2, and the gear shaft sealing mechanism for the dynamic separator of the medium speed coal mill comprises an upper disc 3-1, a lower disc 3-2 and a plurality of blades 3-3; the upper disc 3-1 and the lower disc 3-2 are oppositely arranged, a plurality of blades 3-3 are uniformly distributed on the upper disc 3-1 and the lower disc 3-2 along the radial direction, and the lower disc 3-2 is sleeved on the gear shaft 1. The other methods are the same as those in the first embodiment.

The third concrete implementation mode: the embodiment is described with reference to fig. 1-2, and the gear shaft sealing mechanism for the dynamic separator of the medium speed coal mill is described in the embodiment, wherein both the upper disc 3-1 and the lower disc 3-2 are annular plates, the inner diameter of the upper disc 3-1 is larger than that of the lower disc 3-2, and other methods are the same as those of the first embodiment.

The fourth concrete implementation mode: the embodiment is described with reference to fig. 1-2, and the embodiment describes a gear shaft sealing mechanism for a dynamic separator of a medium speed coal mill, wherein a sealing ring 2 is arranged on the inner side wall of a motor fixing box body 5, and an impeller assembly 3 is arranged on the outer side wall of the motor fixing box body 5. The other methods are the same as those in the first embodiment.

The fifth concrete implementation mode: referring to the embodiment described in fig. 1 to 2, in the gear shaft sealing mechanism for a dynamic separator of a medium speed coal mill according to the embodiment, a seal ring 2 is mounted on an inner side wall of a motor fixing case 5 by a plurality of bolts. The other methods are the same as those in the fourth embodiment.

Claims (5)

1. The utility model provides a gear shaft sealing mechanism for medium speed pulverizer dynamic separator which characterized in that: the device comprises a gear shaft (1), a sealing ring (2), an impeller component (3), a positioning sleeve (4), a motor fixing box body (5), a gear installation sealing box body (6) and two bearings, wherein the motor fixing box body (5) is fixedly connected with the gear installation sealing box body (6), the gear shaft (1) is inserted on the motor fixing box body (5) and the gear installation sealing box body (6), a shell of a driving motor is fixedly installed on the motor fixing box body (5), the output end of a rotating shaft of the driving motor is fixedly connected with one end of the gear shaft (1), the other end of the gear shaft (1) is rotatably connected and installed on the gear installation sealing box body (6) through one bearing, the joint of the gear shaft (1) and the motor fixing box body (5) is provided with the other bearing, the bearing is sleeved on the gear shaft (1), one end of the bearing is provided with the sealing ring (2), and the, and the sealing ring (2) and the impeller component (3) are sleeved on the gear shaft (1), a positioning sleeve (4) is arranged on the gear shaft (1) close to the impeller component (3), and the positioning sleeve (4) is fixedly sleeved on the gear shaft (1).

2. The gear shaft sealing mechanism for the dynamic separator of the medium speed coal mill according to claim 1, is characterized in that: the impeller assembly (3) comprises an upper disc (3-1), a lower disc (3-2) and a plurality of blades (3-3); the upper disc (3-1) and the lower disc (3-2) are oppositely arranged, a plurality of blades (3-3) are uniformly distributed on the upper disc (3-1) and the lower disc (3-2) along the radial direction, and the lower disc (3-2) is sleeved on the gear shaft (1).

3. The gear shaft sealing mechanism for the dynamic separator of the medium speed coal mill according to claim 1, is characterized in that: the upper disc (3-1) and the lower disc (3-2) are both annular plates, and the inner diameter of the upper disc (3-1) is larger than that of the lower disc (3-2).

4. The gear shaft sealing mechanism for the dynamic separator of the medium speed coal mill according to claim 1, is characterized in that: the sealing ring (2) is arranged on the inner side wall of the motor fixing box body (5), and the impeller component (3) is arranged on the outer side wall of the motor fixing box body (5).

5. The gear shaft sealing mechanism for the dynamic separator of the medium speed coal mill according to claim 4, is characterized in that: the sealing ring (2) is arranged on the inner side wall of the motor fixing box body (5) through a plurality of bolts.

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