阅读说明：本技术 一种钢球磨煤机高效动态旋转分离器 (High-efficient developments rotary separator of steel ball coal mill ) 是由 单玉华 阎新民 牛海峰 郭兴军 于 2020-06-15 设计创作，主要内容包括：一种钢球磨煤机高效动态旋转分离器,它涉及煤粉颗粒分离技术领域。本发明为解决现有动态旋转分离器容易产生较大振动,影响系统正常作业；各出粉管处煤粉浓度差别较大,影响燃烧效果的问题。本发明包括电机、主壳体、收集器、旋转轴、旋转叶片机构和风粉混合器,收集器设置在主壳体内,主壳体的下端端口与煤粉送风口连接,收集器的上端沿圆周方向设有一组静叶片,收集器的上端与风粉混合器的下端通过静叶片连接,风粉混合器的上端沿圆周方向均布设有多个出粉管,电机竖直向下固接在风粉混合器上端的中部,电机的输出轴与旋转轴的一端连接,旋转轴的另一端固接有旋转叶片机构,旋转叶片机构设置在静叶片的内侧。本发明用于煤粉分离。(A high-efficiency dynamic rotary separator of a steel ball coal mill relates to the technical field of coal dust particle separation. The invention aims to solve the problem that the conventional dynamic rotating separator is easy to generate large vibration and influences the normal operation of a system; the coal dust concentration difference at each powder outlet pipe is large, and the combustion effect is influenced. The invention comprises a motor, a main shell, a collector, a rotating shaft, a rotating blade mechanism and a wind powder mixer, wherein the collector is arranged in the main shell, the lower end port of the main shell is connected with a pulverized coal air supply outlet, the upper end of the collector is provided with a group of stationary blades along the circumferential direction, the upper end of the collector is connected with the lower end of the wind powder mixer through the stationary blades, the upper end of the wind powder mixer is uniformly provided with a plurality of powder outlet pipes along the circumferential direction, the motor is vertically and downwards fixedly connected to the middle part of the upper end of the wind powder mixer, the output shaft of the motor is connected with one end of the rotating shaft, the other end of the rotating shaft is fixedly. The invention is used for coal dust separation.)

1. The utility model provides a high-efficient developments rotary separator of steel ball coal mill which characterized in that: the high-efficiency dynamic rotary separator for the steel ball coal mill comprises a motor (1), a main shell (2), a collector (3), a rotating shaft (4), a rotating blade mechanism (5) and an air-powder mixer (6), wherein the collector (3) is arranged in the main shell (2), the lower end port of the main shell (2) is connected with a coal powder air supply outlet, the upper end of the collector (3) is provided with a group of static blades (7) along the circumferential direction, the upper end of the collector (3) is connected with the lower end of the air-powder mixer (6) through the static blades (7), the upper end of the air-powder mixer (6) is uniformly provided with a plurality of powder outlet pipes (8) along the circumferential direction, the motor (1) is vertically and downwards fixedly connected to the middle part of the upper end of the air-powder mixer (6), an output shaft of the motor (1) is connected with one end of the rotating shaft (4), the rotating blade mechanism (5) is provided inside the stationary blade (7).

2. The high efficiency dynamic rotary separator for a steel ball coal mill as claimed in claim 1, wherein: the wind powder mixer is characterized in that the wind powder mixer (6) is in an inverted cone shape, a plurality of guide vanes (9) are uniformly distributed on the inner side wall of the wind powder mixer (6) along the circumferential direction, each guide vane (9) is vertically and fixedly connected to a guide vane shaft (10), and the guide vane shafts (10) are vertically inserted into the side wall of the wind powder mixer (6) and are rotationally connected with the side wall of the wind powder mixer (6).

3. The high efficiency dynamic rotary separator for a steel ball coal mill as claimed in claim 2, wherein: the shape of the guide vane (9) is a curved surface with the middle part protruding outwards, and the cross section of the guide vane (9) is in a rectangular strip shape.

4. The high efficiency dynamic rotating separator for a steel ball coal mill as claimed in claim 1, 2 or 3, wherein: the upper end face of the main shell body (2) is provided with a shell upper cover plate (11), the air-powder mixer (6) is fixedly connected to the middle of the outer end face of the shell upper cover plate (11), the upper end of the static blade (7) is fixedly connected to the middle of the inner end face of the shell upper cover plate (11), and the lower end of the air-powder mixer (6) is communicated with the inside of the main shell body (2).

5. The high efficiency dynamic rotary separator for a steel ball coal mill as claimed in claim 4, wherein: an upper cover plate (12) of the air-powder mixer is arranged on the upper end face of the air-powder mixer (6), and the powder outlet pipes (8) are uniformly distributed on the upper cover plate (12) of the air-powder mixer.

6. The high efficiency dynamic rotary separator for a steel ball coal mill as claimed in claim 5, wherein: the outer side of the rotating shaft (4) is sleeved with a positioning shaft sleeve (13), the positioning shaft sleeve (13) is respectively inserted on an upper cover plate (12) of the air-powder mixer and an upper cover plate (11) of the shell, the rotating shaft (4) is rotatably connected with the positioning shaft sleeve (13) through a bearing (14), and end covers (15) are respectively arranged at ports at two ends of the positioning shaft sleeve (13).

7. The high efficiency dynamic rotating separator for a steel ball coal mill as claimed in claim 1, 2, 3, 5 or 6, wherein: a plurality of sundry collecting blades (16) are uniformly distributed on the outer side wall of the lower portion of the collector (3) along the circumferential direction, one end of each sundry collecting blade (16) is fixedly arranged on the inner side wall of the main shell (2), and the other end of each sundry collecting blade (16) is fixedly arranged on the outer side wall of the collector (3).

8. The high efficiency dynamic rotary separator for a steel ball coal mill as claimed in claim 7, wherein: and a manhole (17) is arranged on the side wall of the lower part of the main shell (2).

9. The high efficiency dynamic rotating separator for a steel ball coal mill as claimed in claim 1, 2, 3, 5, 6 or 8, wherein: the rotating blade mechanism (5) comprises a plurality of moving blades (18) which are uniformly distributed along the circumferential direction.

10. The high efficiency dynamic rotary separator for a steel ball coal mill as claimed in claim 1, wherein: an output shaft of the motor (1) is connected with an input shaft of a speed reducer (19), and an output shaft of the speed reducer (19) is connected with one end of the rotating shaft (4) through a coupler (20).

Technical Field

The invention relates to the technical field of coal dust particle separation, in particular to a high-efficiency dynamic rotary separator of a steel ball coal mill.

Background

The existing dynamic rotating separator drives a speed reducer (the speed reducer is supported on a speed reducer supporting frame which is fixed on the plane of an upper cover plate of a shell) by a variable frequency motor (the rotating speed of the variable frequency motor can be adjusted randomly within the rotating speed range of the selected variable frequency motor according to the working requirement, so as to meet the requirements of different coal powder fineness), the speed reducer drives a coupler, the coupler drives a rotating shaft (the rotating shaft is supported on a bearing device which is fixed on the plane of the upper cover plate of the shell), and the rotating shaft drives a rotating blade device (the rotating blade device is provided with a moving blade for separating coal powder particles).

When the variable-frequency motor works, the rotating blade device is driven to rotate by the variable-frequency motor through the speed reducer and the connecting pieces. The coarse and fine pulverized coal particles after being milled are carried to a separation area of a dynamic rotary separator by primary air, the dynamic rotary separator separates the fine pulverized coal particles from the coarse pulverized coal particles by utilizing an aerodynamic principle and a centrifugal force, and the fine pulverized coal particles enter a boiler burner for combustion through a powder outlet pipe and a powder making system pipeline. After the coarse coal powder particles are separated out, the coarse coal powder particles are sent back to a grinding area for grinding again through a powder return cone of the collector, and the process is circulated until the fineness of the coal powder reaches the requirement.

However, the existing dynamic rotating separator has the following problems:

1) because the speed reducer supporting frame is higher, the rotating blade device is higher, the diameter is larger, and the mass of a rotating part, namely a rotor, is mainly concentrated on the rotating blade device. When a rotating component, namely a rotor rotates, a main inertia shaft passing through the mass center of the rotor is not coincident with a rotating axis due to the reasons of uneven material quality, errors of part shapes (particularly non-machined parts), assembly errors, asymmetric structural shape distribution (such as key slots) and the like, so that unbalanced centrifugal force and moment are generated by the rotor during rotation, and when the rigidity of a support is insufficient or the centrifugal force and moment are overlarge, the vibration of a system exceeds an allowable range, so that the variable frequency motor and the speed reducer generate vibration of different degrees, and the normal operation of the system is influenced.

2) The separated air-powder mixture directly enters the powder outlet pipe through the opening on the upper cover plate of the shell, and the coal powder concentration of each separated air-powder mixture in the shell is different, so that the coal powder concentration difference of each powder outlet pipe is larger, and the combustion effect is greatly influenced.

3) When the wind-powder mixture is mixed with impurities (such as ropes, packaging bags and the like) which are high in flexibility, light in fiber shape and large in sheet shape, the separator is broken down and even stopped, and the normal work of the separator is influenced.

Disclosure of Invention

The invention aims to solve the problem that the conventional dynamic rotating separator is easy to generate large vibration to influence the normal operation of a system; the coal powder concentration difference at each powder outlet pipe is large, the adaptation range of the coal mill to different coal qualities and the adjustment range of the coal powder fineness are narrow, the coal powder fineness and the coal powder uniformity index are low, the combustion effect is influenced, and the output of the coal mill is influenced, so that the high-efficiency dynamic rotary separator for the steel ball coal mill is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a high-efficient developments rotary separator of steel ball coal mill includes the motor, the main casing body, the collector, the rotation axis, rotating vane mechanism and wind powder blender, the collector sets up in the main casing body, the lower extreme port and the buggy supply-air outlet of the main casing body are connected, the upper end of collector is equipped with a set of stator blade along the circumferencial direction, the upper end of collector passes through the stator blade with the lower extreme of wind powder blender and is connected, the upper end of wind powder blender is equipped with a plurality of powder pipes along the circumferencial direction equipartition, the vertical middle part of downward rigid coupling in wind powder blender upper end of motor, the output shaft of motor is connected with the one end of rotation axis, the other end rigid coupling of.

Compared with the prior art, the invention has the following beneficial effects:

the dynamic rotary separator of the steel ball coal mill improves the supporting rigidity of the motor speed reducer, improves the vibration resistance, reduces the vibration and prolongs the service life of the dynamic rotary separator of the steel ball coal mill; the fineness of the pulverized coal separated by the dynamic separator can be adjusted online within the range of 1-40% of R90, the uniformity index n of the pulverized coal in the air-powder mixture is more than or equal to 1.2, and the pulverized coal uniformity is excellent; the air-powder mixing efficiency of the pulverized coal distributor is improved, the concentration difference of each powder outlet pipe is reduced, and the combustion efficiency is improved; the adaptation range of the coal mill to different coal qualities and the adjustment range of the coal powder fineness are enlarged, and the combustion efficiency of the coal is improved; the fineness of the pulverized coal is improved, and the uniformity index of the pulverized coal is improved; the possibility that sundries are wound on the movable and fixed blades is avoided, and the fault of the separator caused by the sundries is avoided; the working efficiency of the separator is improved, and the economic benefit of the dynamic rotary separator of the steel ball coal mill is improved. Compared with the same type of products, the output of the steel ball coal mill can be improved by more than 5%.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a plan view of fig. 1, where R indicates a position after the guide vane 9 is rotated forward by 45 °, and L indicates a position after the guide vane 9 is rotated backward by 45 °.

Detailed Description