CN214626685U

CN214626685U - Driving speed reducer for rotary separator

Info

Publication number: CN214626685U
Application number: CN202023185276.1U
Authority: CN
Inventors: 蒋文; 王春民; 李夏雨; 马龙
Original assignee: Beijing Power Equipment Group Co ltd
Current assignee: Beijing Power Equipment Group Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-11-05
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses a coal pulverizer rotating separator drive decelerator. The driving speed reducer adopts a pair of speed reduction gear pair design, drives the gear pair to drive and reduce speed through the variable frequency motor, and then drives the impeller to rotate through the turntable bearing, the hollow turntable and the hollow rotating shaft, so that normal operation of equipment is realized. The driving speed reducer comprises a variable frequency motor, a motor base, a coupler, a high-speed input shaft, a pair of reduction gear pairs, a hollow rotary disc, a hollow rotary shaft, a driving speed reduction box body, a driving speed reduction box cover, a respirator, a sealing system and the like. The reduction gear pair is a high-speed gear and a low-speed gear respectively, the sealing system adopts a multiple sealing structure combining air sealing and mechanical sealing, the separation of lubricating oil in the reduction gear of the driving part and impurities such as dust inside and outside the rotary separator is ensured, the sealing is reliable, and the operation is safe. The whole structure has compact design, light weight and reliable transmission, and is convenient for production, assembly, maintenance and overhaul.

Description

Driving speed reducer for rotary separator

Technical Field

The utility model relates to a coal pulverizer rotating separator drive decelerator in industrial applications such as electric power, cement, petrochemical industry.

Background

At present, a driving speed reducer of a rotary separator of a coal mill is generally arranged at the top of an equipment workshop, the arrangement space of the driving speed reducer is higher, auxiliary steel beams and pipelines are more, coal dust particles are more, and the overhaul and maintenance work is more complex. Meanwhile, the rotary separator driving speed reducer at home and abroad is easy to feed powder and leak oil in the operation process, and the separator or the driving speed reducer is usually required to be integrally disassembled to be overhauled after problems occur, so that the operation difficulty is high, the overhauling time is long, and the whole safe operation of the rotary separator equipment of the coal mill is not facilitated.

In view of the above technical problems in the prior art, there is an urgent need to develop a driving reduction gear with a simple and reliable sealing gear structure to meet the technical requirements of the driving reduction gear of the coal mill rotary separator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be applied to coal pulverizer rotating separator's drive decelerator, make rotating separator drive decelerator simple structure, sealed reliable, reduce drive decelerator space betterly, improve drive decelerator's lubrication, sealed effect simultaneously, make rotating separator drive decelerator variable frequency speed governing simple, compact structure, operation reliable.

In order to achieve the above purpose, the specific technical scheme of the utility model is that:

the utility model provides a coal pulverizer is with rotatory separator drive decelerator, includes inverter motor, shaft coupling, motor cabinet, reduction gear pair, drive reduction case lid, drive reduction case, hollow turntable, hollow rotating shaft, respirator and sealing system, reduction gear is vice including high-speed input shaft, high-speed bearing, high-speed gear, gyration support, the motor cabinet is used for supporting inverter motor, high-speed input shaft passes through the shaft coupling and links to each other with inverter motor, high-speed bearing includes input end upper bearing and input lower bearing, the internal input shaft under bracing base and the gyration support base that sets up of drive reduction case, the respirator is connected with the drive reduction case lid, sealing system includes mechanical seal and air seal chamber.

Preferably, the high-speed input shaft is in fit and key connection with the high-speed gear, the upper bearing of the input end is positioned at the upper end of the high-speed input shaft, and the lower bearing of the input end is positioned at the lower end of the high-speed input shaft, so that double-point support is carried out on the high-speed input shaft.

Preferably, the rotary support is of an inner ring structure and an outer ring structure, the inner ring of the rotary support is a turntable bearing, the outer ring of the rotary support is a low-speed gear and is meshed with a high-speed gear, and the inner ring and the outer ring of the rotary support are of an integrated structure, so that the transmission reliability is guaranteed, and the structural space of the driving speed reducer is reduced.

Preferably, the hollow rotary table is fixedly connected to the rotary support inner ring rotary table bearing, the hollow rotary table is fixedly connected with the hollow rotary shaft, and the hollow rotary table drives the hollow rotary shaft to rotate.

Preferably, the drive reduction box body and the drive reduction box cover are of oval structures, enough space is guaranteed, the size of the box body is reduced at the same time, the drive reduction box body is fixedly connected with the drive reduction box cover, and a connection joint surface is coated with a temperature-resistant oil-resistant sealant.

Preferably, the air sealing cavity comprises a sealing air inlet and a sealing air inlet, the mechanical seal comprises an input end mechanical seal and an output end mechanical seal, the input end mechanical seal adopts a framework oil seal, an O-shaped seal and a first V-shaped seal and a multiple sealing structure, the output end mechanical seal is sealed by 4 second V-shaped seals and one carbon fine seal, and the multiple sealing structure design ensures that lubricating oil in the driving speed reducer is isolated from impurities such as dust in the rotary separator.

According to the structure, the utility model discloses can be when guaranteeing gear reduction simple structure, lubricated reliable, improve the isolation effect of impurity such as the inside and outside buggy of drive decelerator and separator, also guarantee that drive decelerator's self-lubricating system is steady reliable, do not have the oil leakage, advance the powder phenomenon, save drive decelerator's the space that occupies, reduce and maintain the cost of overhaul, promote drive decelerator's operation and maintain the reliability.

Drawings

FIG. 1 is a block diagram of a rotating decoupler drive reduction unit of the present invention;

FIG. 2 is a front view of the drive reduction box and the drive reduction box cover of the present invention;

fig. 3 is a top view of the drive reduction box and the drive reduction box cover of the present invention;

FIG. 4 is a block diagram of the drive reduction seal system of the present invention;

fig. 5 is a structural view of the drive reduction input mechanical seal system of the present invention;

fig. 6 is a structural diagram of the mechanical sealing system of the output end of the drive reduction gear of the present invention.

Detailed Description

For the purpose of making the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help those skilled in the art more fully understand the present invention.

A rotary separator driving speed reducer for a coal mill comprises a variable frequency motor 1, a coupler 2, a motor base 3, a reduction gear pair, a driving reduction box cover 8, a driving reduction box body 9, a hollow rotary disc 10, a hollow rotary shaft 11, a breather 12 and a sealing system. The motor mount 3 is configured to support the inverter motor 1. The reduction gear pair comprises a high-speed input shaft 4, a high-speed bearing, a high-speed gear 6 and a rotary support 7. The motor base 3 is used for supporting the variable frequency motor 1. The coupler 2 penetrates through the motor base 3 to connect the high-speed input shaft 4 with the variable-frequency motor 1. The high-speed bearing comprises an input end upper bearing 51 and an input end lower bearing 52, an input shaft lower supporting base 91 and a rotary supporting base 92 are arranged in the driving reduction box body, the respirator 12 is connected with the driving reduction box cover 8, and the sealing system comprises a mechanical seal 13 and an air sealing cavity 14.

The high-speed input shaft 4 is in matched connection with the high-speed gear 6 to realize synchronous rotation; the input end upper bearing 51 is located at the upper end of the high-speed input shaft 4, and the input end lower bearing 52 is located at the lower end of the high-speed input shaft 4, so that the high-speed input shaft 4 is supported at two points, and the stable rotation of the input end is ensured.

The rotary support 7 is of an inner ring structure and an outer ring structure, the inner ring of the rotary support 7 is a turntable bearing, the outer ring of the rotary support 7 is a low-speed gear and is meshed with the high-speed gear 6, the high-speed gear 6 drives the rotary support 7 to rotate, and the inner ring and the outer ring of the rotary support 7 are of an integrated structure. The hollow rotary table 10 is tightly connected to the rotary support 7 inner ring rotary table bearing, the hollow rotary table 10 is tightly connected with the hollow rotary shaft 11, and the hollow rotary table 10 drives the hollow rotary shaft 11 to rotate. The structure has compact design and light weight, can bear axial force, radial force and tipping moment at the same time, effectively ensures the reliability of transmission, and reduces the structure space design of the driving speed reducer.

The driving reduction box body 9 and the driving reduction box cover 8 are of oval structures, so that the whole size of the box body is reduced while enough space is ensured for carrying out reduction gear pair and lubrication. The driving reduction box body 9 is fixedly connected with the driving reduction box cover 8, high-temperature-resistant oil-resistant sealant is smeared on the connection joint surface, bearing lubricating oil is placed in the driving reduction box body 9, and all the lubricating oil is circulated in the driving reduction box body 9 in a closed mode, so that sealing is reliable.

The air-tight chamber 14 includes a sealing air inlet 141 and a sealing air inlet 142, sealing air enters the air-tight chamber 14 through the sealing air inlet 141, and dust in the rotating separator can be effectively prevented from entering the driving decelerator because the sealing air pressure is higher than the internal pressure of the rotating separator.

The mechanical seal 13 includes an input end mechanical seal 131 and an output end mechanical seal 132. The input end mechanical seal 131 adopts a multi-seal structure design of a framework oil seal 131a, an O-shaped seal 131b and a first V-shaped seal 131c, and can effectively prevent lubricating oil in the driving speed reducing device from leaking. The output end mechanical seal 132 is sealed by 4 second V-shaped seals 132a and one fine carbon seal 132b, so that lubricating oil in the driving speed reducer can be prevented from leaking, and dust in the rotary separator can be isolated. The multiple sealing design of the structure can ensure the reliable sealing and safe operation of the driving speed reducer.

What has been described above is merely a preferred embodiment of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the overall spirit of the invention, and these should also be construed as the scope of the invention.

Claims

1. The utility model provides a coal pulverizer is with rotatory separator drive decelerator, includes inverter motor (1), shaft coupling (2), motor cabinet (3), reduction gear pair, drive reduction case lid (8), drive reduction case (9), hollow carousel (10), hollow rotating shaft (11), respirator (12) and sealing system, motor cabinet (3) are used for supporting inverter motor (1), its characterized in that: the reduction gear pair comprises a high-speed input shaft (4), a high-speed bearing, a high-speed gear (6) and a rotary support (7), the high-speed input shaft (4) is connected with a variable frequency motor (1) through a coupler (2), the high-speed bearing comprises an input end upper bearing (51) and an input end lower bearing (52), an input shaft lower support base (91) and a rotary support base (92) are arranged in a driving reduction box body (9), a respirator (12) is connected with a driving reduction box cover (8), and a sealing system comprises a mechanical seal (13) and an air seal cavity (14).

2. The rotating separator drive reducer for a coal pulverizer of claim 1, wherein: the high-speed input shaft (4) is connected with the high-speed gear (6) in a matching mode, the input end upper bearing (51) is located at the upper end of the high-speed input shaft (4), and the input end lower bearing (52) is located at the lower end of the high-speed input shaft (4) and supports the high-speed input shaft (4) in a double-point mode.

3. The rotating separator drive reducer for a coal pulverizer of claim 1, wherein: the rotary support (7) is of an inner ring and outer ring structure, the inner ring of the rotary support (7) is a turntable bearing, the outer ring of the rotary support (7) is a low-speed gear and is meshed with the high-speed gear (6), the inner ring and the outer ring of the rotary support (7) are of an integrated structure, transmission reliability is guaranteed, and meanwhile the structural space of the driving speed reducer is reduced.

4. The rotating separator drive reducer for a coal pulverizer of claim 1, wherein: the hollow rotary table (10) is fixedly connected to an inner ring rotary table bearing of the rotary support (7), the hollow rotary table (10) is fixedly connected with the hollow rotary shaft (11), and the hollow rotary table (10) drives the hollow rotary shaft (11) to rotate.

5. The rotating separator drive reducer for a coal pulverizer of claim 1, wherein: the driving reduction box body (9) and the driving reduction box cover (8) are of oval structures, the driving reduction box body (9) is tightly connected with the driving reduction box cover (8), and the connecting and combining surface is coated with high-temperature-resistant and oil-resistant sealant.

6. The rotating separator drive reducer for a coal pulverizer of claim 1, wherein: the air sealing cavity (14) comprises a sealing air inlet (141) and a sealing air inlet (142), the mechanical seal (13) comprises an input end mechanical seal (131) and an output end mechanical seal (132), the input end mechanical seal (131) adopts a framework oil seal (131a), an O-shaped seal (131b) and a first V-shaped seal (131c) to form a multiple sealing structure, and the output end mechanical seal (132) is sealed by 4 second V-shaped seals (132a) and a carbon fine seal (132 b).