A new type of dust prevention device for roller system of vertical mill

Abstract

The utility model discloses a novel vertical mill roller system dust prevention device, which belongs to the field of vertical mills. The dust prevention device is added at the oil seal cover of the grinding roller and the main shaft, and an air seal outer ring is fixed on the packing pressure cover of the device to form an air cavity between the air seal outer ring and the main shaft. Combined with the air seal baffle ring on the main shaft, when in use, an air source injects air with a higher external air pressure into the air cavity through an air pipe joint of the air seal baffle ring according to the external air pressure, so that dust infiltrated with the main shaft cannot enter the air cavity, and further cannot enter the oil seal and affect internal lubrication, thereby reducing the maintenance frequency of oil seals, bearings, lubricating oil, and shaft sleeve components, saving use cost and maintenance time. At the same time, the air cavity air pipe of the device is interlocked with the lubrication circuit through an electromagnetic valve to ensure that the dust prevention device can be started and stopped synchronously when the grinding roller is in use. The air source can also automatically adjust the pressure through an environmental air pressure monitor and a pressure gauge connected to the air cavity air pipe, so as to better ensure the air cavity pressure.

Description

Technical Field

[0001] The utility model belongs to the field of vertical mills, and particularly relates to a novel vertical mill roller system dust prevention device. Background Art

[0002] Vertical mill is a grinding equipment that integrates fine crushing, drying, grinding, powder selection and conveying. It is widely used in the grinding and ultra-fine grinding of various solid materials in cement, building materials, electric power, metallurgy, chemical industry, non-metallic minerals and other industries. It is also commonly used for grinding in mines. The roller system of the vertical mill is the key component of the vertical mill. One end of the roller system is connected to the rocker arm of the vertical mill, and the other end is connected to the 4 grinding rollers inside the vertical mill. The spherical roller bearings connected to the roller system are lubricated by lubricating oil. The rotating grinding roller and the fixed roller shaft are mostly protected by oil seals, but The existing technology is that when performing ore grinding, due to the high intensity of ore grinding and large amount of dust, a large amount of dust will accumulate at the oil seal cover of the main shaft in a short period of time and easily penetrate into the oil seal as the grinding roller rotates on the main shaft, resulting in the oil seal being easily damaged and the lubricating oil being contaminated in a short period of time, thereby shortening the service life of the bearing and wearing the internal parts of the roller shaft. It is necessary to frequently replace the oil seal and bearing, lubricating oil and repair the sleeve parts, which leads to increased use costs. At the same time, because maintenance requires a long downtime, frequent maintenance seriously reduces production efficiency and causes inconvenience. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In order to overcome the shortcomings of the existing technology, a new type of vertical mill roller dust prevention device is proposed to solve the problem that when the existing technology is performing ore grinding, due to the high intensity of ore grinding and large amount of dust, a large amount of dust will accumulate at the oil seal cover of the main shaft in a short time and easily penetrate into the oil seal as the grinding roller rotates on the main shaft, resulting in the oil seal being easily damaged and the lubricating oil being contaminated in a short period of time, thereby shortening the service life of the bearing and wearing the internal parts of the roller shaft, requiring frequent replacement of oil seals and bearings, lubricating oil, and repair of sleeve parts, etc., which in turn leads to increased use costs. At the same time, because maintenance requires a long downtime, frequent maintenance seriously reduces production efficiency and causes inconvenience.

[0005] (II) Technical solution

[0006] The utility model is realized by the following technical scheme: the utility model proposes a novel vertical mill roller dust prevention device, the structure of which includes a grinding roller, a main shaft and a large end cover, one end of the main shaft is equipped with a grinding roller, the other end of the main shaft is connected to a rocker arm, the grinding roller is locked with a large end cover at the connection between the side of the rocker arm and the main shaft, and the large end cover is sleeved on the main shaft;

[0007] The connection between the main shaft and the large end cover is also equipped with a dustproof device, an oil seal, a packing and a packing gland. The dustproof device, the oil seal, the packing and the packing gland are all sleeved on the main shaft. The oil seal is assembled at the locking point between the large end cover and the grinding roller. The packing is embedded between the large end cover away from the grinding roller and the main shaft. The packing gland is locked to the large end cover away from the grinding roller. The packing gland is used as a cover for packing assembly. The dustproof device is assembled on the packing gland away from the large end cover.

[0008] The dustproof device includes an air source, a pressure gauge, a solenoid valve, an air pipe, a sealing joint, an air-sealing outer ring, an air gap, an air-sealing baffle ring, an assembly ring, a locking bolt, an air pipe joint, an air hole and an air cavity. The packing gland is fixed with an air-sealing outer ring on the side away from the large end cover. An air cavity is formed between the inner ring end of the air-sealing outer ring and the main shaft. The air-sealing baffle ring and the assembly ring are an integrated structure. The air-sealing baffle ring and the assembly ring are vertically arranged. The assembly ring is locked to the main shaft by a locking bolt. The air-sealing baffle ring is arranged in the air cavity. Away from the inside of the packing gland side, an air gap is formed between the outer ring end of the air seal baffle ring and the inner ring end of the air seal outer ring, and the air seal baffle ring is fixed with more than one air pipe joint on the side away from the packing gland. An air hole is provided through the air pipe joint fixed on the air seal baffle ring, and the air pipe joint is communicated with the air cavity through the air hole. The air pipe joint is covered with a sealing joint that is locked, and the sealing joint is fixedly connected to one end of the air pipe, and the other end of the air pipe is connected to an air source. The air pipe is also equipped with a pressure gauge and a solenoid valve.

[0009] Furthermore, the dust-proof device also includes an ambient air pressure monitor, and the ambient air pressure monitor is connected to an air source.

[0010] Furthermore, the solenoid valve is interlocked with the lubrication circuit of the main shaft.

[0011] Furthermore, the air gap is a ring-shaped one with uniform size.

[0012] Furthermore, the end of the gas seal baffle ring away from the packing gland is flush with the end of the gas seal outer ring away from the packing gland.

[0013] Furthermore, the solenoid valve is located on the side of the pressure gauge on the air pipe adjacent to the sealing joint.

[0014] (III) Beneficial effects

[0015] One of the above technical solutions has the following advantages or beneficial effects:

[0016] In order to solve the problem that in the prior art, when ore grinding is carried out, a large amount of dust will accumulate at the oil seal cover of the main shaft in a short time due to the high intensity of ore grinding and large amount of dust. As the grinding roller rotates on the main shaft, it is easy to penetrate into the oil seal, resulting in the oil seal being easily damaged and the lubricating oil being contaminated in a short time, thereby shortening the service life of the bearing and the wear of the internal parts of the roller shaft, and requiring frequent replacement of oil seals and bearings, lubricating oil, and repair of sleeve parts, etc., which in turn leads to increased use costs. At the same time, because maintenance requires a long downtime, frequent maintenance seriously reduces production efficiency and causes inconvenience. The invention provides two oil seals, an oil seal and a packing, to strengthen protection, and adds a dustproof device at the oil seal cover of the grinding roller and the main shaft. An air seal outer ring is fixed on the packing gland to form an air cavity between the air seal outer ring and the main shaft. Combined with the air seal baffle ring on the main shaft, the air source injects air with higher external air pressure into the air cavity through the air pipe joint of the air seal baffle ring according to the external air pressure during use, so that the dust infiltrated with the main shaft cannot enter the air cavity, and then cannot enter the oil seal and affect the internal lubrication, thereby reducing the maintenance frequency of the oil seal, bearing, lubricating oil and sleeve components, saving the use cost and maintenance time. At the same time, the air cavity air pipe of the device is interlocked with the lubrication circuit through the solenoid valve to ensure that the dust prevention device can be started and stopped synchronously when the grinding roller is in use. The air source can also automatically adjust the pressure through the ambient air pressure monitor and the pressure gauge connected to the air cavity air pipe, which can better ensure the air cavity pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a novel vertical mill roller dust prevention device of the utility model;

[0019] Figure 2 For this utility model Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0020] Figure 3 It is a cross-sectional structural diagram of the grinding roller, main shaft, large end cover and dustproof device combination of the utility model;

[0021] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure of B;

[0022] In the figure: grinding roller - 1, main shaft - 2, large end cover - 3, dustproof device - 4, oil seal - 5, packing - 6, packing gland - 7, air source - 4a, pressure gauge - 4b, ambient air pressure monitor - 4c, solenoid valve - 4d, air pipe - 4e, sealing joint - 4f, air seal outer ring - 4g, air gap - 4h, air seal retaining ring - 4i, assembly ring - 4j, locking bolt - 4k, air pipe joint - 4l, air hole - 4m, air cavity - 4n. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0024] The utility model provides a novel vertical mill roller dust prevention device: its structure includes a grinding roller 1, a main shaft 2 and a large end cover 3, one end of the main shaft 2 is equipped with the grinding roller 1, the other end of the main shaft 2 is connected to the rocker arm, the grinding roller 1 is locked with the large end cover 3 at the connection between the main shaft 2 and the side of the rocker arm, and the large end cover 3 is sleeved on the main shaft 2;

[0025] The connection between the main shaft 2 and the large end cover 3 is also equipped with a dustproof device 4, an oil seal 5, a packing 6 and a packing gland 7. The dustproof device 4, the oil seal 5, the packing 6 and the packing gland 7 are all sleeved on the main shaft 2. The oil seal 5 is installed at the locking point between the large end cover 3 and the grinding roller 1. The packing 6 is embedded between the large end cover 3 away from the grinding roller 1 and the main shaft 2. The packing gland 7 is locked to the large end cover 3 away from the grinding roller 1. The packing gland 7 is used for the sealing of the packing 6. The dustproof device 4 is installed on the packing gland 7 away from the large end cover 3.

[0026] The dustproof device 4 includes an air source 4a, a pressure gauge 4b, a solenoid valve 4d, an air pipe 4e, a sealing joint 4f, an air-sealing outer ring 4g, an air gap 4h, an air-sealing baffle ring 4i, an assembly ring 4j, a locking bolt 4k, an air pipe joint 4l, an air hole 4m and an air cavity 4n. The packing gland 7 is fixed with an air-sealing outer ring 4g on the side away from the large end cover 3. An air cavity 4n is formed between the inner ring end of the air-sealing outer ring 4g and the main shaft 2. The air-sealing baffle ring 4i and the assembly ring 4j are an integrated structure. The air-sealing baffle ring 4i and the assembly ring 4j are vertically arranged. The assembly ring 4j is locked to the main shaft 2 by a locking bolt 4k. It is arranged inside the air cavity 4n away from the packing gland 7 side, and an air gap 4h is formed between the outer ring end of the air sealing baffle ring 4i and the inner ring end of the air sealing outer ring 4g. One or more air pipe joints 4l are fixed to the air sealing baffle ring 4i away from the packing gland 7 side. An air hole 4m is penetrated through the air pipe joint 4l fixed on the air sealing baffle ring 4i. The air pipe joint 4l is communicated with the air cavity 4n through the air hole 4m. The air pipe joint 4l is covered and locked with a sealing joint 4f. The sealing joint 4f is fixedly connected to one end of the air pipe 4e, and the other end of the air pipe 4e is connected to the air source 4a. The air pipe 4e is also equipped with a pressure gauge 4b ​​and a solenoid valve 4d.

[0027] The dust-proof device 4 further includes an ambient air pressure monitor 4c, and the ambient air pressure monitor 4c is connected to the air source 4a.

[0028] The solenoid valve 4 d is interlocked with the lubrication circuit of the main shaft 2 .

[0029] Wherein, the air gap 4h is a ring with uniform size.

[0030] The end of the air seal retaining ring 4i away from the packing gland 7 is flush with the end of the air seal outer ring 4g away from the packing gland 7.

[0031] The solenoid valve 4d is located on the air pipe 4e, on the side of the pressure gauge 4b ​​adjacent to the sealing joint 4f.

[0032] Implementation plan: During the use of the grinding roller of the vertical mill, the environmental air pressure monitor 4c of the dustproof device 4 can monitor the air pressure of the use environment, and then the air source 4a supplies air to the air cavity 4n through the air pipe 4e. During the air supply, the pressure gauge 4b ​​of the air pipe 4e can monitor the air pressure of the air supply to ensure that the air pressure of the air supply is higher than the environmental air pressure. At the same time, the solenoid valve 4d of the air pipe 4e is interlocked with the lubrication circuit of the equipment, so that the dust removal of the equipment can be started and stopped synchronously, ensuring the dustproof effect while avoiding energy waste. After the air cavity 4n is supplied with air by the air source 4a, the gas will be discharged from the air seal. The connecting gap between the retaining ring 4i and the main shaft 2 and the air gap 4h reserved between the air seal retaining ring 4i and the air seal outer ring 4g are blown out, so that dust cannot penetrate into the oil seal from the main shaft, and then cannot enter the oil seal and affect the internal lubricating oil, thereby ensuring the cleanliness of the inside of the connection between the grinding roller and the main shaft, reducing the maintenance frequency of the oil seal, bearings, lubricating oil and sleeve components, saving the use cost and maintenance time. Due to the air gap 4h, the air seal outer ring 4g that rotates with the grinding roller 1 and the air seal retaining ring 4i that does not rotate with the main shaft 2 will not interfere with each other, which is convenient for use.

[0033] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0035] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A novel vertical mill roller dust prevention device, the structure of which comprises a grinding roller (1), a main shaft (2) and a large end cover (3), wherein one end of the main shaft (2) is equipped with the grinding roller (1), the other end of the main shaft (2) is connected to a rocker arm, the grinding roller (1) is locked with a large end cover (3) at the connection between the main shaft (2) and the side adjacent to the rocker arm, and the large end cover (3) is sleeved on the main shaft (2); Features: The connection between the main shaft (2) and the large end cover (3) is also equipped with a dustproof device (4), an oil seal (5), a packing (6) and a packing gland (7); the dustproof device (4), the oil seal (5), the packing (6) and the packing gland (7) are all sleeved on the main shaft (2); the oil seal (5) is installed at the locking point between the large end cover (3) and the grinding roller (1); the packing (6) is embedded between the large end cover (3) away from the grinding roller (1) and the main shaft (2); the packing gland (7) is locked to the large end cover (3) away from the grinding roller (1); the packing gland (7) is used as a cover for the packing (6); the dustproof device (4) is installed at the packing gland (7) away from the large end cover (3); The dustproof device (4) comprises an air source (4a), a pressure gauge (4b), a solenoid valve (4d), an air pipe (4e), a sealing joint (4f), an air-sealing outer ring (4g), an air gap (4h), an air-sealing baffle ring (4i), an assembly ring (4j), a locking bolt (4k), an air pipe joint (4l), an air hole (4m) and an air cavity (4n); the packing gland (7) is fixed with an air-sealing outer ring (4g) on ​​the side away from the large end cover (3); an air cavity (4n) is formed between the inner ring end of the air-sealing outer ring (4g) and the main shaft (2); the air-sealing baffle ring (4i) and the assembly ring (4j) are an integrated structure; the air-sealing baffle ring (4i) and the assembly ring (4j) are vertically arranged; the assembly ring (4j) is locked to the main shaft (2) by a locking bolt (4k); The ring (4i) is arranged inside the air cavity (4n) away from the packing gland (7), and an air gap (4h) is formed between the outer ring end of the air sealing baffle ring (4i) and the inner ring end of the air sealing outer ring (4g). One or more air pipe joints (4l) are fixed to the side of the air sealing baffle ring (4i) away from the packing gland (7). An air hole (4m) is provided through the air pipe joint (4l) fixed to the air sealing baffle ring (4i). The air pipe joint (4l) is communicated with the air cavity (4n) through the air hole (4m). The air pipe joint (4l) is covered and locked with a sealing joint (4f). The sealing joint (4f) is fixedly connected to one end of the air pipe (4e), and the other end of the air pipe (4e) is connected to the air source (4a). The air pipe (4e) is also equipped with a pressure gauge (4b) and a solenoid valve (4d).

2. A novel vertical mill roller dust prevention device according to claim 1, characterized in that: The dust prevention device (4) also includes an ambient air pressure monitor (4c), and the ambient air pressure monitor (4c) is connected to the air source (4a).

3. The novel vertical mill roller dust prevention device according to claim 1 is characterized in that: The solenoid valve (4d) is interlocked with the lubrication circuit of the main shaft (2).

4. The novel vertical mill roller dust prevention device according to claim 1 is characterized in that: The air gap (4h) is in the form of a ring with uniform size.

5. According to claim 1, the novel vertical mill roller dust prevention device is characterized in that: The end of the air seal baffle ring (4i) away from the packing gland (7) is flush with the end of the air seal outer ring (4g) away from the packing gland (7).

6. The novel vertical mill roller dust prevention device according to claim 1 is characterized in that: The solenoid valve (4d) is located on the side of the pressure gauge (4b) on the air pipe (4e) adjacent to the sealing joint (4f).

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