Novel vertical mill gearbox

Abstract

The embodiment of the utility model provides a novel vertical mill gearbox, which relates to the technical field of gearboxes and comprises an outer box, an inner box, a base and a gear transmission mechanism. An assembly hole is formed in the bottom of the outer box, and the base is fixed to the outer box and seals the assembly hole; the inner box is mounted in the outer box, and a gap is formed between the bottom of the inner box and the base, so that the inner box is in a suspended state; the gear transmission mechanism is installed in the inner box. According to the design of the gear box, the probability that lubricating oil directly leaks to the outside of the gear box can be reduced, the influence of the leaked oil on the external environment is reduced, and therefore the gear box meets the environment-friendly requirement.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and more specifically, to a novel vertical mill gearbox. Background Technology

[0002] The gearbox of a vertical mill is a core component of a vertical mill system, widely used in grinding systems such as raw material vertical mills, cement vertical mills, coal vertical mills, and slag vertical mills in the building materials, power, and metallurgical industries. Currently, industrial environmental protection requirements are very stringent, demanding that there be no leaks at the work site.

[0003] The inventors discovered during their research that the existing novel vertical mill gearbox has at least the following drawbacks:

[0004] The housing of a conventional vertical mill gearbox is a welded product. Some components of the gearbox transmission mechanism directly rotate with the through holes on the housing, and the through holes are usually sealed by structural components such as end caps. Since there is vibration during the operation of the gearbox, this vibration is directly transmitted to the connection between the end cap and the housing. Oil leakage is likely to occur at the connection between the end cap and the housing. Utility Model Content

[0005] The purpose of this invention includes, for example, providing a novel vertical mill gearbox that can reduce the probability of lubricating oil leaking directly to the outside of the gearbox and reduce the impact of leaked oil on the external environment.

[0006] The embodiments of this utility model can be implemented as follows:

[0007] In a first aspect, this utility model provides a novel vertical mill gearbox, comprising:

[0008] The outer casing, inner casing, base, and gear transmission mechanism are provided; the bottom of the outer casing is provided with an assembly hole, and the base is fixed to the outer casing and closes the assembly hole; the inner casing is installed inside the outer casing, and the bottom of the inner casing is spaced apart from the base so that the inner casing is suspended; the gear transmission mechanism is installed in the inner casing.

[0009] In an optional embodiment, the outer casing includes a casing body and a top cover, the mounting hole is provided at the bottom of the casing body, and the base is connected to the casing body; the top of the casing body is provided as an open opening, and the top cover is installed on the casing body and closes the open opening; the top cover is provided with a positioning hole for the gear transmission mechanism to extend out.

[0010] In an optional embodiment, the housing includes a cylindrical body and a support ring plate fixed to the bottom of the cylindrical body, the support ring plate protruding from the outer circumferential surface of the cylindrical body in a radially outward direction; the top cover is fixedly connected to the cylindrical body; the support ring plate forms the assembly hole; the base is fixedly connected to the support ring plate; and the bottom of the inner box has a gap from the support ring plate.

[0011] In an optional embodiment, the support ring plate is provided with an assembly groove, the assembly groove is located on the side of the support ring plate away from the cylinder body, and the assembly hole penetrates the bottom wall of the assembly groove; the base is installed in the assembly groove, and the base and the opening of the assembly groove are spaced apart.

[0012] In an optional embodiment, the support ring plate is provided with an oil drain groove, which is located on the side of the support ring plate near the inner box.

[0013] In an optional embodiment, the support ring plate is provided with an oil guiding slope, which is located on the side of the support ring plate near the inner box, and the oil guiding slope is used to guide the oil to the oil drain groove.

[0014] In an optional embodiment, the inner box and the outer box are detachably connected by a first fastener.

[0015] In an optional embodiment, the base is detachably connected to the outer casing via a second fastener.

[0016] In an optional embodiment, the novel vertical mill gearbox further includes an input shaft and an output flange. The input shaft is rotatably connected to the inner housing, and the output flange is rotatably connected to the outer housing. The input shaft is driven by the output flange through the gear transmission mechanism.

[0017] In an optional embodiment, the gear transmission mechanism includes a first bevel gear, a second bevel gear, a sun gear, planet gears, a planet carrier, a ring gear, and an anti-rotation pin; the input shaft is coaxial with and driven by the first bevel gear; both the first and second bevel gears are rotatably mounted on the inner housing, and the first and second bevel gears mesh with each other; the sun gear is coaxial with and driven by the second bevel gear; the sun gear meshes with the planet gears, the planet gears mesh with the ring gear, the planet gears are rotatably mounted on the planet carrier, and the planet carrier is connected to the output flange; the ring gear is fixedly connected to the inner housing; the anti-rotation pin is installed on both the inner housing and the ring gear to restrict the rotation of the ring gear relative to the inner housing.

[0018] The beneficial effects of this utility model embodiment include, for example:

[0019] In summary, the novel vertical mill gearbox provided in this embodiment uses an outer casing, an inner casing, and a base in conjunction. The gear transmission mechanism is arranged in the inner casing, which is suspended inside the outer casing. A base is provided at the bottom of the outer casing, and the base seals the mounting holes at the bottom of the outer casing. During gearbox operation, even if some lubricating oil leaks from the bottom of the inner casing, it falls onto the base and is collected there. Furthermore, the inner casing is suspended, so vibrations generated during gearbox operation are less likely to directly affect the base. This reduces the likelihood of weakened sealing at the connection between the base and the outer casing due to vibration, and prevents lubricating oil from leaking outside the gearbox, thus providing environmental benefits and meeting gearbox operation requirements. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of a novel vertical mill gearbox according to an embodiment of this application.

[0022] icon:

[0023] 100-Outer casing; 110-Casing; 111-Cylinder body; 112-Support ring plate; 113-Assembly hole; 114-Assembly groove; 115-Oil drain groove; 116-Operating hole; 120-Top cover; 121-Positioning hole; 200-Inner casing; 201-Anti-rotation hole; 300-Base; 400-Gear transmission mechanism; 410-First bevel gear; 420-Second bevel gear; 430-Sun gear; 440-Planet gear; 450-Planet carrier; 460-Gear ring; 470-Anti-rotation pin; 500-Input shaft; 600-Output flange; 700-First fastener; 800-Second fastener. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0030] In the prior art, the gearbox housing 110 of a vertical mill is an integral structure, generally with an assembly hole 113 at the bottom. Parts of the shafts in the transmission mechanism inside the gearbox are rotatably mounted at the assembly hole 113, and a sealing structure is provided at the assembly hole 113 to limit lubricating oil leakage. Additionally, a cap is installed on the outside of the assembly hole 113. Because the gearbox vibrates during operation, affecting the sealing effect, lubricating oil inside the housing 110 easily leaks from the assembly hole 113 and directly outside the gearbox, impacting the environment.

[0031] In view of this, the designers have provided a new type of vertical mill gearbox that can improve the situation where lubricating oil leaks directly from inside the gearbox to the outside, thereby enabling the gearbox to meet the environmental protection requirements during operation.

[0032] Please refer to Figure 1This embodiment provides a novel vertical mill gearbox, including an outer housing 100, an inner housing 200, a base 300, and a gear transmission mechanism 400. The bottom of the outer housing 100 is provided with an assembly hole 113, and the base 300 is fixed to the outer housing 100 and closes the assembly hole 113. The inner housing 200 is installed inside the outer housing 100, and the bottom of the inner housing 200 is spaced from the base 300 to allow the inner housing 200 to be suspended. The gear transmission mechanism 400 is installed in the inner housing 200.

[0033] As described above, the working principle of the novel vertical mill gearbox provided in this embodiment is as follows:

[0034] After power is input to the gear transmission mechanism 400, it is output after speed regulation by the gear transmission mechanism 400, thereby obtaining the required speed and torque. Since the gear transmission mechanism 400 is located in the inner housing 200, which is suspended inside the outer housing 100, and a base 300 is provided at the bottom of the outer housing 100, the base 300 closes the mounting hole 113 at the bottom of the outer housing 100. During gearbox operation, even if some lubricating oil leaks from the bottom of the inner housing 200 during gear transmission mechanism 400 operation, the lubricating oil falls onto the base 300 and is collected there. Furthermore, since the inner housing 200 is suspended, the vibration generated during gearbox operation is unlikely to directly act on the base 300, reducing the sealing effect at the connection between the base 300 and the outer housing 100 due to vibration. Lubricating oil is less likely to leak outside the gearbox, thus providing environmental benefits and meeting gearbox operation requirements.

[0035] The following embodiments illustrate the details of the novel vertical mill gearbox of this application by way of example.

[0036] Please refer to Figure 1In this embodiment, optionally, the novel vertical mill gearbox includes an outer housing 100, an inner housing 200, a base 300, a gear transmission mechanism 400, an input shaft 500, and an output flange 600. The inner housing 200 is suspended within the outer housing 100, and the base 300 is connected to the bottom of the outer housing 100, with a gap between the bottom of the inner housing 200 and the base 300. The input shaft 500 is rotatably engaged with the inner housing 200, and the output flange 600 is rotatably engaged with the outer housing 100. The input shaft 500 is connected to the output flange 600 via the gear transmission mechanism 400. Torque is input to the input shaft 500, and after speed regulation by the gear transmission mechanism 400, it is output to the output flange 600, thus realizing torque output. Since the inner housing 200 is suspended in the outer housing 100, and there is a gap between the inner housing 200 and the base 300, the vibration during the operation of the gearbox is not easily transmitted directly to the base 300. The lubricating oil is stored inside the inner housing 200. Even if the lubricating oil leaks, it falls onto the base 300 and is collected by the base 300. It is not easy for the lubricating oil to leak directly to the outside of the gearbox, and it is not easy to pollute the external environment, thus meeting the environmental protection requirements.

[0037] Please refer to Figure 1 In this embodiment, optionally, the outer casing 100 includes a casing 110 and a top cover 120, with the top cover 120 connected to the top of the casing 110. Optionally, the casing 110 includes a cylindrical body 111 and a support ring plate 112 fixed to the bottom of the cylindrical body 111. The cylindrical body 111 can be a cylindrical structure with open ends, and the top cover 120 can be detachably connected to the top of the cylindrical body 111 via bolts or other structural components. The support ring plate 112 can be a rectangular ring or a circular ring, etc. The support ring plate 112 protrudes from the outer circumference of the cylindrical body 111 in a radially outward direction. The support ring plate 112 and the cylindrical body 111 can be coaxial, resulting in a regular structure that is easy to manufacture. In actual use, the support ring plate 112 is placed on the ground, supporting the entire gearbox. The support ring plate 112 has a large contact area with the ground, resulting in a low center of gravity for the gearbox and a stable and reliable structure.

[0038] It should be understood that the support ring plate 112 and the cylinder body 111 can be fixed by welding, which is a simple, reliable and highly airtight fixing method.

[0039] Meanwhile, the area enclosed by the support ring plate 112 is also the assembly hole 113. The assembly hole 113 can be a round hole, and the assembly hole 113 is connected to and coaxially arranged with the cylinder body 111.

[0040] Please refer to Figure 1Optionally, the support ring plate 112 has a top surface and a bottom surface. The top surface of the support ring plate 112 is provided with a guide slope, and an oil drain groove 115 is also provided on the top surface of the support ring plate 112. The oil drain groove 115 is located on the lower side of the guide slope. The guide slope can guide the lubricating oil leaking from the inner tank 200 to the oil drain groove 115. By setting an oil collection tank at the oil drain groove 115, the leaked lubricating oil is collected, facilitating subsequent filtration and recycling, thus improving resource utilization efficiency. During installation, the top surface fits against the bottom of the cylinder body 111. Simultaneously, the bottom surface is provided with a circular mounting groove 114, and the mounting hole 113 penetrates the bottom wall of the mounting groove 114. The base 300 is fixed in the mounting groove 114, and there is a gap between the bottom surface of the base 300 and the opening of the mounting groove 114. That is, the base 300 is also suspended, and the fit between the base 300 and the outer casing 100 is tighter, making it less prone to movement relative to the outer casing 100. The sealing effect at the connection between the base 300 and the outer casing 100 is good, and it is not easy to leak oil. At the same time, the base 300 is located in the mounting groove 114, which reduces the vertical dimension of the gearbox.

[0041] Optionally, the cylinder body 111 has an operation hole 116 on its cylinder wall. The operation hole 116 can be a round hole or a rectangular hole, etc.

[0042] Optionally, the top cover 120 is provided with a positioning hole 121, which is used for the gear transmission mechanism 400 to extend out or for the shaft of the output flange 600 to pass through. The positioning hole 121 is preferably a round hole.

[0043] Please refer to Figure 1 In this embodiment, optionally, the top of the inner box 200 is open and the bottom is closed. The top of the inner box 200 is in contact with the bottom surface of the top cover 120. The inner box 200 can be detachably connected to the top cover 120 via a first fastener 700. The first fastener 700 can be a bolt, etc. Meanwhile, the side of the inner box 200 is also provided with an anti-rotation hole 201, which can be a round hole. When the inner box 200 is fixed to the top cover 120, the anti-rotation hole 201 on the inner box 200 communicates with the operating hole 116 on the cylinder body 111, and the two can be arranged coaxially.

[0044] It should be noted that the base 300 can be detachably connected to the support ring plate 112 via a second fastener 800, which can be a bolt or the like. Before assembly, the base 300 can be opened first, and the inner box 200 can be installed from the bottom of the cylinder body 111 into the cylinder body 111. Then, the base 300 can be installed on the support ring plate 112, and the base 300 can be used to close the assembly hole 113.

[0045] Please refer to Figure 1In this embodiment, optionally, the gear transmission mechanism 400 includes a first bevel gear 410, a second bevel gear 420, a sun gear 430, planet gears 440, a planet carrier 450, a ring gear 460, and an anti-rotation pin 470. The input shaft 500 is coaxial with and driven by the first bevel gear 410. Both the first bevel gear 410 and the second bevel gear 420 are rotatably mounted on the inner housing 200, and the first bevel gear 410 meshes with the second bevel gear 420. The sun gear 430 is coaxial with and driven by the second bevel gear 420; the sun gear 430 meshes with the planet gear 440, and the planet gear 440 meshes with the ring gear 460. The planet gear 440 is rotatably mounted on the planet carrier 450, which is connected to the output flange 600. The shaft on the output flange 600 is rotatably engaged with the positioning hole 121 via a bearing. The ring gear 460 is embedded in the inner housing 200 and fixedly connected to it. The anti-rotation pin 470 enters the anti-rotation hole 201 on the inner housing 200 through the operating hole 116 and is inserted into the gear ring 460, thus fixing the anti-rotation pin 470 to both the inner housing 200 and the gear ring 460 simultaneously. The anti-rotation pin 470 restricts the rotation of the gear ring 460 relative to the inner housing 200. During assembly, the gear transmission mechanism 400 can be engaged with the inner housing 200 first, then the inner housing 200 can be installed from the bottom of the outer housing 100 onto the top cover 120 of the outer housing 100, and finally the input shaft 500 and output flange 600 can be installed. Obviously, in other embodiments, the assembly sequence and method of the inner housing 200, outer housing 100, gear transmission mechanism 400, input shaft 500, and output flange 600 can be adaptively adjusted.

[0046] The novel vertical mill gearbox provided in this embodiment has a gear transmission mechanism 400 installed in an inner housing 200, which is suspended inside an outer housing 100. A base 300 is installed at the bottom of the outer housing 100, and the bottom of the base 300 is suspended. In this way, during gearbox operation, vibrations generated by the gear transmission mechanism 400 are not easily transmitted directly to the base 300 connected to the outer housing 100. Relative movement between the base 300 and the outer housing 100 is also minimized. Lubricating oil leaking from the inner housing 200 falls onto the base 300 and is discharged and collected through the oil drain groove 115, preventing it from falling directly outside the gearbox and thus minimizing environmental pollution and meeting environmental protection requirements.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A novel vertical mill gearbox, characterized in that, include: The outer casing (100), inner casing (200), base (300), and gear transmission mechanism (400) are provided; the bottom of the outer casing (100) is provided with an assembly hole (113), and the base (300) is fixed to the outer casing (100) and closes the assembly hole (113); the inner casing (200) is installed inside the outer casing (100), and the bottom of the inner casing (200) is spaced from the base (300) so that the inner casing (200) is suspended; the gear transmission mechanism (400) is installed in the inner casing (200).

2. The novel vertical mill gearbox according to claim 1, characterized in that: The outer casing (100) includes a casing (110) and a top cover (120). The mounting hole (113) is located at the bottom of the casing (110), and the base (300) is connected to the casing (110). The top of the casing (110) is open, and the top cover (120) is installed on the casing (110) and closes the open. The top cover (120) is provided with a positioning hole (121) for the gear transmission mechanism (400) to extend out.

3. The novel vertical mill gearbox according to claim 2, characterized in that: The housing (110) includes a cylindrical body (111) and a support ring plate (112) fixed to the bottom of the cylindrical body (111). The support ring plate (112) protrudes from the outer circumferential surface of the cylindrical body (111) in a radially outward direction. The top cover (120) is fixedly connected to the cylindrical body (111). The support ring plate (112) forms the assembly hole (113). The base (300) is fixedly connected to the support ring plate (112). The bottom of the inner box (200) is spaced from the support ring plate (112).

4. The novel vertical mill gearbox according to claim 3, characterized in that: The support ring plate (112) is provided with an assembly groove (114), the assembly groove (114) is located on the side of the support ring plate (112) away from the cylinder body (111), and the assembly hole (113) penetrates the bottom wall of the assembly groove (114); the base (300) is installed in the assembly groove (114), and the base (300) and the opening of the assembly groove (114) are spaced apart.

5. The novel vertical mill gearbox according to claim 3, characterized in that: The support ring plate (112) is provided with an oil drain groove (115), which is located on the side of the support ring plate (112) near the inner box (200).

6. The novel vertical mill gearbox according to claim 5, characterized in that: The support ring plate (112) is provided with an oil guiding slope, which is located on the side of the support ring plate (112) near the inner box (200). The oil guiding slope is used to guide the oil to the oil drain groove (115).

7. The novel vertical mill gearbox according to any one of claims 1-6, characterized in that: The inner box (200) and the outer box (100) are detachably connected by a first fastener (700).

8. The novel vertical mill gearbox according to any one of claims 1-6, characterized in that: The base (300) and the outer casing (100) are detachably connected by a second fastener (800).

9. The novel vertical mill gearbox according to any one of claims 1-6, characterized in that: The novel vertical mill gearbox also includes an input shaft (500) and an output flange (600). The input shaft (500) is rotatably connected to the inner housing (200), and the output flange (600) is rotatably connected to the outer housing (100). The input shaft (500) is connected to the output flange (600) via the gear transmission mechanism (400).

10. The novel vertical mill gearbox according to claim 9, characterized in that: The gear transmission mechanism (400) includes a first bevel gear (410), a second bevel gear (420), a sun gear (430), planet gears (440), a planet carrier (450), a ring gear (460), and an anti-rotation pin (470); the input shaft (500) is coaxial with and driven by the first bevel gear (410), and both the first bevel gear (410) and the second bevel gear (420) are rotatably mounted in the inner housing (200). The sun gear (430) meshes with the second bevel gear (420); the sun gear (430) is coaxial with the second bevel gear (420) and is connected in a transmission manner; the sun gear (430) meshes with the planet gear (440), the planet gear (440) meshes with the ring gear (460), the planet gear (440) is rotatably mounted on the planet carrier (450), the planet carrier (450) is connected to the output flange (600); the ring gear (460) meshes with the inner housing (200). Fixed connection; the anti-rotation pin (470) is installed on both the inner housing (200) and the gear ring (460). To limit the rotation of the gear ring (460) relative to the inner housing (200).

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