Speed reducer of vertical rolling mill

Abstract

A vertical rolling mill speed reducer belongs to the technical field of speed reducers. Which comprises a box body (9), an input shaft (6) is arranged on the side wall of the box body (9), two output shafts (3) are arranged on the upper surface of the box body (9) side by side, and the input shaft (6) is connected with the two output shafts (3) through a middle shaft in the box body (9). An inner sealing mechanism is arranged between the output shaft (3) and the output shaft convex ring (18); and an outer sealing mechanism is arranged at the upper port of the output shaft convex ring (18). In the speed reducer of the vertical rolling mill, the combined sealing structure consisting of the inner sealing mechanism and the outer sealing mechanism is arranged on the output shaft, so that a water source is prevented from entering the box body through the output shaft when the speed reducer is sprayed and cooled on site.

Description

Technical Field

[0001] The invention discloses a speed reducer for a vertical roller mill, belonging to the technical field of speed reducers. Background Art

[0002] Vertical rolling mill refers to the mechanical equipment used to complete the steel rolling process from raw materials to finished products. It generally includes a rolling mill, that is, several units composed of a series of auxiliary equipment. Vertical rolling mill consists of a transmission gearbox, a frame, a roll assembly, a side pressure device, a track, a base and a fixed pulley. The transmission gearbox is fixed at the bottom of the frame, and the roll assembly is in the frame above the transmission gearbox. The roll assembly has two vertical roll shafts. When working, the two roll shafts rotate simultaneously driven by the reducer.

[0003] The reducer of the vertical rolling mill is located below the entire rolling mill system when installed. Since it is necessary to drive the two roller shafts to rotate at the same time, the traditional reducer cannot be directly applied to the vertical rolling mill. In the prior art, the reducers used in the vertical rolling mill generally have the following defects: (1) The Chinese invention patent with application number CN201110255365.5, application date August 26, 2011, and patent name "A vertical rolling mill" discloses a technical solution for the vertical rolling mill. In the technical solution, a reducer platform is recorded. In the technical solution, a dual-motor solution is adopted to realize the rotation of the two roller shafts, so the structure is relatively complex. (2) The reducer of the vertical rolling mill is located below the entire rolling mill system when installed. Since the working temperature of the vertical rolling mill is high, the reducer is always in a high temperature state. In order to ensure the reliable operation of the reducer, it is necessary to spray the reducer to cool it down. Therefore, during the spraying process, water easily enters the reducer, causing the reducer to malfunction. (3) When the reducer is working, the meshing parts and bearings of each axle need to be lubricated. The current traditional lubrication method is to set up a lubrication main pipe and lead out several lubrication branch pipes from the lubrication main pipe. In the current lubrication scheme, the layout of each lubrication branch pipe is difficult and there is a certain risk of failure. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and to provide a combined sealing structure consisting of an inner sealing mechanism and an outer sealing mechanism arranged on an output shaft, so as to avoid the water source entering the vertical roller mill reducer in the box through the output shaft when the reducer is sprayed for cooling on site.

[0005] The utility model solves the technical problem by adopting the following technical solution: the vertical roller mill reducer comprises a box body, an input shaft is arranged on the side wall of the box body, two output shafts are arranged side by side on the upper surface of the box body, the input shaft is connected with the two output shafts through an intermediate shaft in the box body, and is characterized in that: an output shaft convex ring is arranged on the upper surface of the box body, the two output shafts are respectively led out from the corresponding output shaft convex rings, an inner sealing mechanism is arranged between the output shaft and the output shaft convex ring, and an outer sealing mechanism is arranged at the upper port of the output shaft convex ring.

[0006] Preferably, the inner sealing mechanism is a multi-layer oil seal axially arranged between the output shaft and the output shaft convex ring.

[0007] Preferably, the external sealing mechanism is a sealing cover arranged at the upper port of the output shaft convex ring.

[0008] Preferably, annular grooves are respectively provided on the upper surface of the output shaft convex ring and the lower surface of the sealing cover, and the grooves provided on the output shaft convex ring and the sealing cover are staggered inside and outside.

[0009] Preferably, the output shaft convex ring protrudes from the upper surface of the box body.

[0010] Preferably, an oil tank is provided on the surface of the housing, and a plurality of lubricating oil pipes are led out from the side of the oil tank, and the lubricating oil pipes extend to the meshing parts among the input shaft, the output shaft and the intermediate shaft, and the bearings at both ends of the input shaft, the output shaft and the intermediate shaft.

[0011] Preferably, a lubricating oil station is provided, an oil inlet is provided on the side of the oil tank, and an oil return port is provided on the bottom of the tank body, and the oil inlet and the oil return port are respectively connected to the lubricating oil station.

[0012] Preferably, rollers are respectively provided on the front and rear sides of the box body.

[0013] Preferably, a plurality of hanging blocks are arranged on the upper surface of the box body, and hanging holes are opened on the hanging blocks; a plurality of hanging rings are also arranged on the upper surface of the box body.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the vertical roller mill reducer, a combined sealing structure consisting of an inner sealing mechanism and an outer sealing mechanism is arranged on the output shaft, which prevents water from entering the box through the output shaft when the reducer is sprayed for cooling on site.

[0016] In the vertical roller mill reducer, the output shaft convex ring protrudes from the surface of the box body, further preventing the spray water from penetrating into the box body.

[0017] Rollers are also provided on the left and right sides of the front and rear end surfaces of the box body. Through the four rollers on the front and rear end surfaces of the box body, after the reducer is hoisted onto the roller table on site, the reducer is rolled by the rollers to be transported to a suitable installation position.

[0018] In this vertical roller mill reducer, the two shafts and the two output shafts are supported by bearings, and the bearings at the bottom of the two shafts and the two output shafts adopt a paired tapered roller bearing structure, which has the advantage of not requiring bearing clearance adjustment and being able to withstand bidirectional axial forces. The upper bearing is completely released axially and only withstands radial forces, which increases the service life of the bearing.

[0019] An oil tank is arranged on the surface of the chassis. The lubricating oil pipe is led out from the side of the oil tank and extends along the surface of the case to the input shaft, the second shaft and the two output shafts. By separately arranging the oil tank on the surface of the chassis, the arrangement of the lubricating oil pipe is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the axonometric view of the vertical roll mill reducer.

[0021] Figure 2 This is the front view of the vertical roll mill reducer.

[0022] Figure 3 for Figure 2 Right view of .

[0023] Figure 4 for Figure 2 Top view of the .

[0024] Figure 5 for Figure 2 Bottom view of .

[0025] Figure 6 for Figure 5 AA section view.

[0026] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0027] Among them: 1, hanging block 2, lifting ring 3, output shaft 4, lubricating oil pipe 5, oil tank 6, input shaft 7, oil inlet 8, roller 9, box body 10, oil return port 11, third-stage idler gear pair 12, oil tank cover 13, first-stage bevel gear pair 14, second-stage cylindrical gear pair 15, second shaft 16, sealing cover 17, oil seal 18, output shaft convex ring. DETAILED DESCRIPTION

[0028] Figures 1 to 7 It is the best embodiment of the utility model, and the following Figures 1 to 7 The utility model is further described.

[0029] like Figures 1 to 5 As shown, a vertical roller mill reducer (hereinafter referred to as reducer) includes a housing 9, an input shaft 6 is led out from the right end surface of the housing 9, and the input shaft 6 adopts a spline shaft, which is easy to install and disassemble, has high strength, and avoids shaft breakage during rotation. Two output shafts 3 are arranged side by side on the upper surface of the housing 9, and the two output shafts 3 protrude from the upper surface of the housing 9.

[0030] Combination Figure 7 Two output shaft convex rings 18 are arranged side by side on the upper surface of the housing 9, and the two output shaft convex rings 18 protrude from the upper surface of the housing 9. The two output shafts 3 pass through the middle of the corresponding output shaft convex rings 18, and two layers of oil seals 17 are axially arranged between the output shafts 3 and the corresponding output shaft convex rings 18. A sealing cover 16 is also arranged on the upper part of the output shaft convex ring 18, and annular grooves are respectively provided on the upper surface of the output shaft convex ring 18 and the lower surface of the sealing cover 16. The grooves provided on the output shaft convex ring 18 and the sealing cover 16 are arranged in an inner and outer staggered manner. When the sealing cover 16 is installed on the surface of the output shaft convex ring 18, the upper and lower grooves are butted up and down.

[0031] Through the sealing cover 16 and the output shaft convex ring 18, and the two layers of oil seals 17, a combined sealing structure is formed at the output shaft 3, which prevents the water source from entering the box body 9 through the output shaft 3 when the reducer is sprayed for cooling on site. At the same time, the output shaft convex ring 18 protrudes from the surface of the box body 9, further preventing the spray water from penetrating into the box body 9.

[0032] Hanging blocks 1 are provided at the left end of the upper surface of the box 9 and at the front and rear sides of the right end of the upper surface of the box 9, and hanging holes are provided on the hanging blocks 1. Two lifting rings 2 are provided at the front and rear sides of the upper surface of the box 9, respectively. The four lifting rings 2 on the upper surface of the box 9 facilitate the lifting of the reducer. Rollers 8 are provided at the left and right sides of the front and rear end surfaces of the box 9, respectively. Through the four rollers 8 on the front and rear end surfaces of the box 9, after the reducer is lifted onto the roller conveyor on site, the reducer is rolled by the rollers 8 to be transported to a suitable installation position.

[0033] An oil tank 5 is also provided on the upper surface of the housing 9. The oil tank 5 is located at one end of the upper surface of the housing 9 near the input shaft 6. The upper end of the oil tank 5 is sealed by an oil tank cap 12. An oil inlet 7 is provided on the right end surface of the housing 9. The oil inlet 7 penetrates the housing 9 and is connected to the oil tank 5. An oil inlet pipe (not shown) is provided at the oil inlet 7. The other end of the oil inlet pipe is connected to a lubricating oil station located outside the reducer. Figure 5Two oil return ports 10 are arranged side by side on the lower surface of the box body 9. The two oil return ports 10 are connected to the lubricating oil station through oil return pipes respectively. The lubricating oil in the box body 9 returns to the lubricating oil station through the oil return pipes to form a circulation.

[0034] like Figure 6 As shown, inside the housing 9, from one side of the input shaft 6, along the layout direction of the housing 9, two shafts 15 and two output shafts 3 are sequentially arranged, wherein the input shaft 6 and the two shafts 15 are connected via a primary bevel gear pair 13, the two shafts 15 and the output shaft 3 near one side thereof are connected via a secondary cylindrical gear pair 14, and the two output shafts 3 are connected via a third idler gear pair 11. The two shafts 15 and the two output shafts 3 are supported by bearings, wherein the bearings at the bottom of the two shafts 15 and the two output shafts 3 adopt a paired tapered roller bearing structure, which has the advantage of being able to withstand bidirectional axial forces without bearing clearance adjustment. The upper bearing is completely released axially and only withstands radial forces, which increases the service life of the bearings.

[0035] A plurality of lubricating oil pipes 4 are led out from the sides of the oil tank 5. After being led out from the sides of the oil tank 5, the lubricating oil pipes 4 extend along the surface of the housing 9 to the input shaft 6, the second shaft 15 and the two output shafts 3, and pass through the housing 9 into the interior thereof to lubricate the first-stage bevel gear pair 13, the second-stage cylindrical gear pair 14 and the third-stage idler gear pair 11 respectively. The lubricating oil pipes 4 also extend to the bearings at the ends of the input shaft 6, the second shaft 15 and the two output shafts 3 to lubricate the bearings at both ends of the input shaft 6, the second shaft 15 and the two output shafts 3. After lubrication, the lubricating oil flows to the bottom of the housing 9 and flows back through the oil return port 10.

[0036] The specific working process and working principle are as follows:

[0037] After the driving motor is connected to the input shaft 6, it drives the input shaft 6 to rotate. When the input shaft 6 rotates, it drives the second shaft 15 and the two output shafts 3 to rotate through the first-stage bevel gear pair 13, the second-stage cylindrical gear pair 14 and the third-stage idler gear pair 11 in sequence. When the two output shafts 3 rotate, they respectively drive the two roller shafts in the vertical rolling mill to rotate.

[0038] At the same time, the lubricating oil in the external lubricating oil station is sent into the oil tank 5 through the oil inlet pipe, and the lubricating oil is sent to the first-stage bevel gear pair 13, the second-stage cylindrical gear pair 14, the third-stage idler gear pair 11, and the bearings at both ends of the input shaft 6, the second shaft 15, and the two output shafts 3 through multiple lubricating oil pipes 4 installed on the side of the oil tank 5, so as to lubricate the meshing parts and bearings. After lubrication, the lubricating oil flows to the bottom of the box body 9, and the lubricating oil in the box body 9 is returned to the lubricating oil station through the oil return pipe installed at the oil return port 10, forming a cycle.

[0039] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A speed reducer for an edge rolling mill, comprising a housing (9), an input shaft (6) being arranged on a side wall of the housing (9), two output shafts (3) being arranged side by side on an upper surface of the housing (9), the input shaft (6) being connected to the two output shafts (3) via an intermediate shaft in the housing (9), characterized in that: An output shaft convex ring (18) is arranged on the upper surface of the housing (9), and two output shafts (3) are respectively led out from the corresponding output shaft convex rings (18). An inner sealing mechanism is arranged between the output shaft (3) and the output shaft convex ring (18), and an outer sealing mechanism is arranged at the upper end of the output shaft convex ring (18).

2. The vertical roller mill reducer according to claim 1, characterized in that: The inner sealing mechanism is a multi-layer oil seal (17) arranged axially between the output shaft (3) and the output shaft convex ring (18).

3. The reducer for a vertical roller mill according to claim 1, characterized in that: The external sealing mechanism is a sealing cover (16) arranged at an upper port of the output shaft convex ring (18).

4. The reducer for a vertical roller mill according to claim 3, characterized in that: Annular grooves are respectively provided on the upper surface of the output shaft convex ring (18) and the lower surface of the sealing cover (16), and the grooves provided on the output shaft convex ring (18) and the sealing cover (16) are arranged in an inner and outer staggered manner.

5. The reducer for a vertical rolling mill according to claim 1, characterized in that: The output shaft convex ring (18) protrudes from the upper surface of the housing (9).

6. The reducer for a vertical roller mill according to claim 1, characterized in that: An oil tank (5) is arranged on the surface of the housing (9), and a plurality of lubricating oil pipes (4) are led out from the side of the oil tank (5). The lubricating oil pipes (4) extend to the meshing positions between the input shaft (6), the output shaft (3), and the intermediate shaft, and to the bearings at both ends of the input shaft (6), the output shaft (3), and the intermediate shaft.

7. The reducer for a vertical rolling mill according to claim 6, characterized in that: A lubricating oil station is provided, an oil inlet (7) is provided on the side of the oil tank (5), and an oil return port (10) is provided on the bottom of the box body (9), and the oil inlet (7) and the oil return port (10) are respectively connected to the lubricating oil station.

8. The reducer for a vertical rolling mill according to claim 1, characterized in that: Rollers (8) are respectively arranged on the front and rear sides of the box body (9).

9. The vertical roller mill reducer according to claim 1, characterized in that: A plurality of hanging blocks (1) are arranged on the upper surface of the box body (9), and hanging holes are opened on the hanging blocks (1); a plurality of hanging rings (2) are also arranged on the upper surface of the box body (9).

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