Novel vertical mill separator

Abstract

The utility model discloses a novel vertical mill separator which comprises a motor, a speed reducer, a mill outlet, a speed reducer output shaft, a labyrinth seal, a stationary blade and a separator rotor blade, the labyrinth seal comprises a labyrinth seal I, a labyrinth seal II, a labyrinth seal III and a labyrinth seal IV, the labyrinth seal III is a stationary seal and is additionally arranged on the inner side of the labyrinth seal I, and the labyrinth seal IV is a stationary seal and is additionally arranged on the inner side of the labyrinth seal II. The labyrinth seal IV is a dynamic seal and is additionally arranged on the inner side of the labyrinth seal II, so that a labyrinth seal airflow channel of the vertical mill separator becomes complicated, and the phenomenon that powder materials run thick when gas is conveyed into a rotor of the separator is effectively eradicated; the redirection blades are additionally arranged on the rotor blades of the separator, gaps of the rotor blades are changed, and the direction of airflow entering the rotor blades is changed, so that on the premise of ensuring the qualified rate of products, the rotating speed of the rotor of the separator is effectively reduced, the efficiency of the separator is improved, the pressure difference in a mill is controlled, and the running power of a system fan is reduced; the fineness, the specific surface area and the product energy consumption are greatly improved.

Description

Technical Field

[0001] The utility model relates to a vertical mill separator, in particular to a novel rotor blade and a labyrinth seal structure of the vertical mill separator, belonging to the technical field of production equipment in industries such as cement, metallurgy, coal, and electric power. Background Art

[0002] The vertical mill body includes a frame, a transmission device, an air duct, a grinding disc, a grinding roller, a rocker arm, a middle shell and a vertical mill separator. Its working principle is as follows: the motor drives the reducer, the reducer drives the grinding disc, and then drives the three grinding rollers to grind the materials entering the grinding disc (the three grinding rollers continuously press the grinding disc through the hydraulic system to ensure effective grinding). The ground powder material reaches the separator through the rising airflow, the separator selects the powder, and reaches the finished product collection system through the rising airflow, and the entire grinding and powder selection process is completed.

[0003] The vertical mill separator includes a motor, a reducer, a mill outlet, a reducer output shaft, a labyrinth seal, a stationary blade, and a separator rotor blade. Its working principle is as follows: the powder material ground on the grinding disc is transported upward to the outside of the separator stationary blade by the rising airflow, and then reaches the separator rotor and the outside of the labyrinth seal through the gap between the stationary blades (the powder material passes through the stationary blades driven by the airflow, and the stationary blades will perform preliminary powder selection on it), and then enters the rotor through the labyrinth seal and the separator rotor. In this process, the separator will re-select the powder material through the gap of the labyrinth seal and the speed of the rotor, and then the powder material reaches the inside of the separator rotor; the powder material reaching the inside of the rotor is the finished material, which leaves the vertical mill through the rising airflow and reaches the product collection system.

[0004] At present, the requirements for domestic online vertical mills are relatively high. For slag vertical mills, the specific surface area of ​​​​the ore powder is required to be 420m 2 / kg, the fineness requirement is not more than 2 (45μm sieve, the sieve residue is not more than 2%). If the existing vertical mill separator wants to achieve the above product quality, the general separator rotor given current must be 26-32 Hz, and some vertical mills even reach 35 Hz. The reason for this is that the structure of the separator rotor and labyrinth seal of the current online vertical mill is relatively simple, which leads to the low efficiency of the vertical mill separator.

[0005] At present, the labyrinth seal of the vertical mill separator is composed of only two seals, with a relatively simple structure. The coarseness of the powder material is relatively common. In addition, the rotor blades of the separator are straight blades, and the distance between the blades is too large, which cannot change the wind direction passing through the rotor blades. The above two deficiencies have caused the separator efficiency to decrease, and the screen residue (fineness) and specific surface area cannot be effectively controlled. The specific surface area and fineness can only be increased by increasing the separator speed. However, if the separator speed is too high, it will cause excessive load, excessive pressure difference in the mill, and excessive energy consumption of the separator, which is not conducive to improving production and quality, let alone reducing energy consumption. Utility Model Content

[0006] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a novel vertical mill separator, which effectively prevents the coarsening of powder materials when the gas is transported to the inside of the separator rotor by improving the labyrinth seal structure, and changes the direction of the airflow entering the rotor blades by improving the separator rotor blade structure, thereby effectively reducing the rotation speed of the separator rotor and improving the separator efficiency while ensuring the product qualification rate.

[0007] The technical solution adopted by the utility model to solve the technical problem is:

[0008] A novel vertical mill separator comprises a motor, a reducer, a mill outlet, a reducer output shaft, a labyrinth seal, stationary blades and separator rotor blades, wherein the labyrinth seal comprises a labyrinth seal I and a labyrinth seal II, and the labyrinth seal also comprises a labyrinth seal III and a labyrinth seal IV, wherein the labyrinth seal III is a stationary seal installed on the inner side of the labyrinth seal I, and the labyrinth seal IV is a dynamic seal installed on the inner side of the labyrinth seal II and rotates together with the separator rotor; redirecting blades are added to the separator rotor blades to change the gap between the rotor blades and also change the direction of airflow entering the rotor blades.

[0009] The labyrinth seal I includes a first outer arc plate, a first inner arc plate and a first flange; the labyrinth seal II includes a small blade and a second flange; the labyrinth seal III includes a third arc plate and a third flange, and the arc plate is connected to the first inner arc plate through the third flange; the labyrinth seal IV includes a fourth arc plate and a fourth flange, and the fourth flange is connected to the second flange.

[0010] The vertical mill separator includes a motor, a reducer, a mill outlet, a reducer output shaft, a labyrinth seal, stationary blades and separator rotor blades. The utility model effectively prevents the coarsening of powder materials when the gas is transported to the inside of the separator rotor by improving the labyrinth seal structure; by improving the separator rotor blade structure, the direction of the airflow entering the rotor blade is changed, and the speed of the separator rotor is effectively reduced while ensuring the product qualification rate, thereby improving the separator efficiency. The other structures have not been modified and remain the same, which is the existing technology.

[0011] The positive and beneficial effects of the utility model are as follows:

[0012] 1. The utility model adds a static seal and a dynamic seal on the basis of the original labyrinth seal (two-piece seal), making the labyrinth seal airflow channel of the vertical mill separator more complicated, effectively preventing the coarseness of powder materials when the gas is transported to the inside of the separator rotor. (The coarseness refers to: unqualified powder materials enter the rotor through the labyrinth seal, resulting in unqualified fineness).

[0013] 2. The utility model adds redirecting blades to the original vertical mill separator rotor blades, changes the gap between the rotor blades, and also changes the direction of the airflow entering the rotor blades. Under the premise of ensuring the product qualification rate, it can effectively reduce the speed of the separator rotor and improve the separator efficiency; at the same time, it effectively controls the pressure difference in the mill, reduces the operating power of the system fan, and greatly improves the fineness, specific surface area and product energy consumption.

[0014] 3. In the actual application of the utility model, when the separator rotor is given a current of 18-26 Hz, the specific surface area of ​​the product can reach 420m 2 / kg, and the fineness reaches 0.6-1.4, which has significant improvements in energy saving and improving product quality and output. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a neutral mill separator in the prior art;

[0016] Figure 2 for Figure 1 An enlarged schematic diagram of the structure of the middle labyrinth seal;

[0017] Figure 3 for Figure 2 Top view of the middle labyrinth seal I;

[0018] Figure 4 for Figure 3 Perspective view in the D direction (rotor rotation direction);

[0019] Figure 5 for Figure 2Top view of the middle labyrinth seal II;

[0020] Figure 6 for Figure 5 Perspective view in the middle D direction (opposite direction of rotor rotation);

[0021] Figure 7 for Figure 1 Sectional view of the middle rotor blade in the AA direction (partial section);

[0022] Figure 8 for Figure 7 Perspective view from the center C direction (rotor rotation direction);

[0023] Fig. 9 This is a structural schematic diagram of a novel vertical mill separator in the utility model;

[0024] Fig.10 for Fig. 9 A magnified schematic diagram of the structure of the new labyrinth seal;

[0025] Fig.11 for Fig.10 Top view of the middle labyrinth seal III;

[0026] Fig.12 for Fig.11 Perspective view in the middle D direction (opposite direction of rotor rotation);

[0027] Fig.13 for Fig.10 Top view of the middle labyrinth seal IV;

[0028] Fig.14 for Fig.13 Perspective view in the middle D direction (opposite direction of rotor rotation);

[0029] Fig.15 for Fig. 9 Sectional view of the middle rotor blade in the AA direction (partial section);

[0030] Fig.16 for Fig.15 Perspective view from the center C direction (rotor rotation direction).

[0031] In the figure, 1 is the motor, 2 is the reducer, 3 is the mill outlet, 4 is the reducer output shaft, 5 is the labyrinth seal, 6 is the stationary blade, 7 is the separator rotor blade, 8 is the redirecting blade;

[0032] 51--labyrinth seal Ⅰ, 52--labyrinth seal Ⅱ, 53--labyrinth seal Ⅲ, 54--labyrinth seal Ⅳ;

[0033] 511--first outer arc plate, 512--first inner arc plate, 513--first flange;

[0034] 521--small blade, 522--second flange;

[0035] 531--the third arc plate, 532--the third flange;

[0036] 541--the fourth arc plate, 542--the fourth flange. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solution and specific embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Example: See Figures 1 to 16 A novel vertical mill separator includes a motor 1, a reducer 2, a mill outlet 3, a reducer output shaft 4, a labyrinth seal 5, a stationary blade 6 and a separator rotor blade 7. The labyrinth seal 5 includes a first labyrinth seal 51 and a second labyrinth seal 52, and also includes a third labyrinth seal 53 and a fourth labyrinth seal 54. The third labyrinth seal 53 is a stationary seal installed on the inner side of the first labyrinth seal 51. The fourth labyrinth seal 54 is a dynamic seal installed on the inner side of the second labyrinth seal 52 and rotates with the separator rotor. A redirecting blade 8 is added to the separator rotor blade 7 to change the gap between the rotor blades and the direction of the airflow entering the rotor blades.

[0039] Among them: the first labyrinth seal 51 includes a first outer arc plate 511, a first inner arc plate 512 and a first flange 513; the second labyrinth seal 52 includes a small blade 521 and a second flange 522; the third labyrinth seal 53 includes a third arc plate 531 and a third flange 532, and the third arc plate 531 is connected to the first inner arc plate 512 through the third flange 532; the fourth labyrinth seal 54 includes a fourth arc plate 541 and a fourth flange 542, and the fourth flange 542 is connected to the second flange 522.

[0040] The utility model adds a static seal and a dynamic seal on the basis of the original labyrinth seal (two-piece seal), making the labyrinth seal airflow channel of the vertical mill separator more complicated, effectively preventing the coarsening of powder materials when the gas is transported to the inside of the separator rotor. (The coarsening phenomenon refers to: unqualified powder materials enter the rotor through the labyrinth seal, resulting in unqualified fineness).

[0041] The utility model adds redirecting blades 8 to the original vertical mill separator rotor blades, changes the gap between the rotor blades, and also changes the direction of the airflow entering the rotor blades. Under the premise of ensuring the product qualification rate, the speed of the separator rotor can be effectively reduced and the separator efficiency can be improved; at the same time, the pressure difference in the mill is effectively controlled, the operating power of the system fan is reduced, and the fineness, specific surface area and product energy consumption are greatly improved.

[0042] In the actual application process of the utility model, when the separator rotor is given a current of 18-26 Hz, the specific surface area of ​​the product can reach 420m 2 / kg, and the fineness reaches 0.6-1.4, which has significant improvements in energy saving and improving product quality and output.

[0043] In the present utility model, all contents involving terms such as "inside", "outside", "upper", "lower", "connected", "adjacent", "stationary", and "moving" are intended to explain the structure and technical solutions of the present utility model, but do not limit the structure and technical solutions of the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the scope of protection of the present utility model.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel vertical mill separator, comprising a motor (1), a reducer (2), a mill outlet (3), a reducer output shaft (4), a labyrinth seal (5), stationary blades (6) and separator rotor blades (7), wherein the labyrinth seal (5) comprises a labyrinth seal I (51) and a labyrinth seal II (52), and is characterized in that: The labyrinth seal (5) further comprises a labyrinth seal III (53) and a labyrinth seal IV (54); the labyrinth seal III (53) is a stationary seal installed on the inner side of the labyrinth seal I (51); the labyrinth seal IV (54) is a dynamic seal installed on the inner side of the labyrinth seal II (52) and rotates together with the separator rotor; redirecting blades (8) are added to the separator rotor blades (7) to change the gap between the rotor blades and also change the direction of the airflow entering the rotor blades.

2. The novel vertical mill separator according to claim 1 is characterized in that: The labyrinth seal I (51) comprises a first outer arc plate (511), a first inner arc plate (512) and a first flange (513); the labyrinth seal II (52) comprises a small blade (521) and a second flange (522); the labyrinth seal III (53) comprises a third arc plate (531) and a third flange (532), the arc plate (531) being connected to the first inner arc plate (512) via the third flange (532); the labyrinth seal IV (54) comprises a fourth arc plate (541) and a fourth flange (542), the fourth flange (542) being connected to the flange (522).

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