Driving system of central feeding powder concentrator

Abstract

The utility model discloses a driving system of a central feeding powder concentrator. The driving system comprises a driving device, a transmission device, a shell sealing device and a tensioning device, the driving device is connected with the transmission device, the transmission device is connected with the shell sealing device, and the tensioning device is connected with the driving device. And the driving requirement of the center blanking powder concentrator in large-torque operation is met, and the safety and reliability of production are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of material classification equipment, specifically relating to a central feeding classifier drive system for use in vertical mill classifiers. Background Technology

[0002] A vertical roller mill classifier mainly consists of several parts: feeding, classifying, discharging, and transmission. Different types of classifiers require different transmission mechanisms based on their structural form and operating conditions; this requires careful consideration of factors such as equipment stability, reliability, and economy. Materials ground by vertical roller mills generally include pulverized coal, cement raw materials, cement meal, slag, and sandstone. Different vertical roller mills and matching classifiers are selected based on material characteristics and product output requirements. Medium and small-sized classifiers typically use a center-feed method, which prevents material accumulation, as seen in coal mill classifiers. Large-sized classifiers, such as those used for cement raw meal and clinker vertical roller mills, generally use a chute-feed method.

[0003] Due to structural limitations, center-feed air classifiers, considering the characteristics of gear drives, chain drives, and belt drives, ultimately choose belt drives. Belt drives offer advantages such as a larger center distance, low noise, simple structure, easy installation, flexible connection, low cost, easy maintenance, and high transmission efficiency. The drive end uses a variable frequency motor directly connected to a small pulley. However, also due to structural limitations, these air classifiers are typically low-torque. For high-torque center-feed air classifiers, structural and cost constraints preclude the use of a direct-drive variable frequency motor, leading to reduced drive reliability. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of high-torque center-feed classifiers, which cannot use direct-drive variable frequency motors, resulting in reduced drive reliability. This invention provides a center-feed classifier drive system that meets the drive requirements of high-torque center-feed classifiers, thereby improving production safety and reliability.

[0005] Technical solution

[0006] To achieve the above-mentioned technical objectives, this utility model proposes a central feeding classifier drive system, characterized in that: it includes a drive device, a transmission device, a housing sealing device, and a tensioning device; the drive device is connected to the transmission device, the transmission device is connected to the housing sealing device, and the tensioning device is connected to the drive device.

[0007] The drive unit includes a motor, a coupling, a reducer, a coupling cover, a drive base, an adjusting shim set, and adjusting bolts. The motor is connected to the reducer via the coupling, and the motor and reducer are connected to the drive base via the adjusting shim set. The adjusting bolts are used to adjust the relative positions of the motor and reducer. The coupling cover is used to protect the coupling. The reducer is connected to the transmission device, and the drive base is mounted on the upper housing of the air classifier.

[0008] The transmission device includes a large pulley, multiple sets of belts, a small pulley, a shaft end pressure plate, and a protective cover. The multiple sets of belts are installed inside the protective cover. One end of each set of belts is installed on the large pulley, and the other end is installed on the small pulley. The small pulley is connected to the output shaft of the drive device, and the large pulley is installed inside the housing sealing device.

[0009] The housing sealing device includes an air sealing box, a housing, a sealing cover, a sealing ring, an air interface flange, a sleeve, an inspection door, and an observation door. The air sealing box is mounted on the housing, the sealing cover is mounted on the sleeve, and the housing is mounted on the air classifier housing. The air sealing box and the sealing cover form a labyrinth seal.

[0010] The tensioning device includes a lifting lug bolt, an adjusting nut, a locating pin, and a cotter pin. The lifting lug bolt is installed on the drive device via the locating pin, and the lifting lug bolt is installed on the upper housing of the classifier via the adjusting nut. The belt tension is achieved by adjusting the adjusting nut.

[0011] Furthermore, the adjusting bolts are installed on the drive base to adjust the relative positions of the motor and the reducer. The adjusting bolts include bolt one for adjusting the left and right spacing and bolt two for adjusting the front and rear center surfaces to align.

[0012] Furthermore, the housing sealing device is equipped with an air interface flange, an inspection door, and an observation door.

[0013] Furthermore, the large pulley is equipped with a ring of signal blocks, and the inner cavity of the lower housing is equipped with a proximity switch.

[0014] Furthermore, the coupling cover is installed on the coupling to protect it.

[0015] Beneficial effects

[0016] This utility model provides a drive system for a center-feed classifier, comprising a drive unit, a transmission unit, a housing sealing device, and a tensioning device. The drive unit is connected to the transmission unit, the transmission unit is connected to the housing sealing device, and the tensioning device is connected to the drive unit. This system meets the drive requirements of a center-feed classifier operating at high torque, improving production safety and reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Appendix Figure 1a This is a structural schematic diagram of an embodiment of the present utility model.

[0019] Appendix Figure 1b This is a front view of an embodiment of the present utility model.

[0020] Appendix Figure 1c This is a top view of an embodiment of the present utility model.

[0021] Appendix Figure 2 It is attached Figure 1c View from A in the middle.

[0022] Appendix Figure 3 It is attached Figure 1c BB section view.

[0023] Appendix Figure 4 It is attached Figure 1b Detailed enlarged view of point C.

[0024] Appendix Figure 5 This is a schematic diagram of the structure of the protective cover in an embodiment of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0030] Example

[0031] As attached Figure 1a As shown in Figures 1b and 1c, a drive system for a center-feed classifier includes a drive unit 1, a transmission unit 2, a housing sealing device 3, and a tensioning device 4. The drive unit 1 is connected to the transmission unit 2, the transmission unit 2 is connected to the housing sealing device 3, and the tensioning device 4 is connected to the drive unit 1.

[0032] The drive device 1 includes a motor 101, a coupling 102, a reducer 103, a coupling cover 104, a drive base 105, an adjusting shim set 106, and adjusting bolts 107. The motor 101 is connected to the reducer 103 via the coupling 102. The motor 101 and the reducer 103 are connected to the drive base 105 via the adjusting shim set 106. The adjusting bolts 107 are used to adjust the relative positions of the motor 101 and the reducer 103. The coupling cover 104 protects the coupling 102. The reducer 103 is connected to the transmission device 2. The drive base 105 is mounted on the upper housing of the air classifier. The transmission device 2 includes a large pulley 201, multiple sets of belts 203, a small pulley 202, a shaft end pressure plate 204, and a protective cover 205. The multiple sets of belts 203 are installed inside the protective cover 205. One end of each belt 203 is mounted on the large pulley 201, and the other end is mounted on the small pulley 202. The small pulley 202 is connected to the output shaft of the drive device 1. The large pulley 201 is installed inside the housing sealing device 3. The housing sealing device 3 includes an air sealing box 301, a housing 302, a sealing cover 303, a sealing ring 304, an air interface flange 305, a sleeve 306, an inspection door 307, and an observation door 310. The air sealing box 301 is mounted on the housing 302, the sealing cover 303 is mounted on the sleeve 306, and the housing 302 is mounted on the classifier housing. The air sealing box 301 and the sealing cover 303 form a labyrinth seal. The tensioning device 4 includes a lifting bolt 401, an adjusting nut 402, a positioning pin 403, and a cotter pin 404. The lifting lug bolt 401 is mounted on the drive device 1 via the positioning pin 403. The lifting lug bolt 401 is also mounted on the upper housing of the classifier via the adjusting nut 402. The belt tension is achieved by adjusting the adjusting nut 402. The protective cover 205 includes a left upper pressure cover 2051, a right upper pressure cover 2052, a left half 2054, and a right half 2053. The adjusting bolt 107 is mounted on the drive base 105. The adjusting bolt 107 includes bolts for adjusting the left and right spacing and bolts for adjusting the alignment of the front and rear center faces. The housing sealing device 3 is equipped with an air interface flange 305, an inspection door 307, and an observation door 310. The large pulley 201 is equipped with a ring of signal blocks 309. The inner cavity of the housing 302 is equipped with a proximity switch 308.

[0033] The air classifier in this center uses a belt drive system. The drive motor 101 and reducer 103 are both mounted on the drive base 105. Adjusting the shims 106 ensures the centerlines of the motor and reducer are on the same horizontal plane. Adjusting the bolts adjusts the relative positions of the motor and reducer, ensuring their centerlines are aligned. The motor is connected to the reducer via a coupling. A small pulley 202 is mounted on the reducer's output shaft, which is connected to a large pulley 201 via multiple belts 203. The large pulley 201 is then connected to a bearing housing to achieve torque transmission. Multiple belts 203 and the small pulley 202 are housed in a protective cover 205. A housing sealing device 3 is installed on the upper housing of the air classifier and is equipped with an air interface flange 305, connecting to a sealed air pipe. The drive base is bolted to the air classifier housing. Loosening the bolts and adjusting the tensioning device 4 allows for belt tensioning.

[0034] As attached Figure 2 As shown, motor 101 is connected to reducer 103 via coupling 102. Motor 101 and reducer 103 are connected to drive base 105 via bolts and adjusting shim set 106. Adjusting shim set 106 is used to adjust the center height of reducer and motor. Adjusting bolt 107 is used to adjust the relative position of motor 101 and reducer 103. Coupling cover 104 is used to protect coupling 102. Reducer 103 is connected to small pulley 202 and is pressed and fixed by shaft end pressure plate 204.

[0035] As attached Figure 3 As shown, the air-sealed box 301 is mounted on the housing 302, and the sealing cover 303 is mounted on the sleeve 306. The housing 302 is bolted to the classifier bearing seat. The air-sealed box 301 and the sealing cover 303 form a labyrinth seal, using compressed air to prevent dust-laden air from entering the transmission device 2. The large pulley 201 of the transmission device is connected to the small pulley 202 via multiple sets of belts 203, and is mounted on the classifier bearing seat, connected by bolts to transmit torque. Simultaneously, the large pulley 201 is equipped with several signal blocks 309. The housing 302 contains a proximity switch 308. When the large pulley 201 operates, it drives the signal blocks 309 to rotate. The proximity switch 308 can detect periodic pulse signals. The number of signal blocks 309 corresponds to the number of pulse signals per rotation. By detecting the number of pulse signals over a fixed period, the rotational speed is converted and compared with the rotational speed converted from the frequency of the variable frequency motor, thus determining whether slippage has occurred. The housing 302 is designed with an inspection door 307 and an observation door 310, which can be used to observe the working wear condition of the large pulley 201 and multiple sets of belts 203, and can also be used to assist in replacing multiple sets of belts 203 and disassembling and assembling the proximity switch 308.

[0036] As attached Figure 4As shown, one end of the lifting bolt 401 is connected to the drive device 1 via the positioning pin 403, and the other end is connected to the upper housing of the classifier via the adjusting nut 402. The tension of the belt is adjusted by adjusting the front and rear adjusting nuts 402.

[0037] As attached Figure 5 As shown, the protective cover 205 is connected to the housing sealing device 3 to prevent external dust from entering the transmission device 2 and to protect the equipment. It is designed to be detachable and consists of an upper left cover 2051, an upper right cover 2052, a left half 2054, and a right half 2053, all of which are connected by bolts for easy maintenance.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A central feed classifier drive system, characterized by: It includes driving device (1), transmission device (2), housing sealing device (3) and tensioning device (4);The driving device (1) is connected with the transmission device (2), the transmission device (2) is connected with the housing sealing device (3), and the tensioning device (4) is connected with the driving device (1); The driving device (1) includes motor (101), shaft coupling (102), speed reducer (103), shaft coupling cover (104), driving base (105), adjusting gasket set (106) and adjusting bolt (107);The motor (101) is connected with the speed reducer (103) through the shaft coupling (102), and the motor (101) and the speed reducer (103) are connected with the driving base (105) through the adjusting gasket set (106), the speed reducer (103) is connected with transmission device (2), and the driving base (105) is installed on the housing of the powder classifier; The transmission device (2) includes large pulley (201), multiple sets of belts (203), small pulley (202), shaft end pressing plate (204) and protective cover (205);The multiple sets of belts (203) are installed in the protective cover (205), one end of the multiple sets of belts (203) is installed on the large pulley (201), the other end is installed on the small pulley (202), the small pulley (202) is connected with the output shaft of the driving device (1), and the large pulley (201) is installed in the housing sealing device (3); The housing sealing device (3) includes air sealing box (301), housing (302), sealing cover (303), sealing ring (304) and sleeve (306);The air sealing box (301) is installed on the housing (302), the sealing cover (303) is installed on the sleeve (306), and the housing (302) is installed on the housing of the powder classifier; The tensioning device (4) includes lug bolt (401), adjusting nut (402), positioning pin (403) and split pin (404);The lug bolt (401) is installed on the driving device (1) through the positioning pin (403), the lug bolt (401) is installed on the housing of the powder classifier through the adjusting nut (402), and the tensioning of the belt is realized by adjusting the adjusting nut (402).

2. A central feed classifier drive system as claimed in claim 1, wherein: The adjusting bolt (107) is installed on the driving base (105) for adjusting the relative position of the motor (101) and the speed reducer (103), and the adjusting bolt (107) includes left-right adjusting interval bolt one and front-back adjusting center alignment bolt two.

3. A central feed pulverizer drive system as claimed in claim 1 wherein: The housing sealing device (3) is provided with air interface flange (305), inspection door (307) and observation door (310).

4. A central feed classifier drive system as claimed in claim 1, wherein: A plurality of signal blocks (309) are installed on the large pulley (201), and a proximity switch (308) is installed in the inner cavity of the housing (302).

5. A central feed pulverizer drive system as claimed in claim 1 wherein: The shaft coupling cover (104) is installed on the shaft coupling (102) for protecting the shaft coupling (102).

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