Potash roller press special planetary reducer

Abstract

This invention provides a planetary reducer specifically designed for potash ore roller presses. It includes a first planetary reducer and a second planetary reducer with identical structures. A torque arm and a connecting crank are mounted on the housing. The two planetary reducers are connected end-to-end via the torque arm and the connecting crank, thus fixing them together to drive the roller press shaft. By using two identical planetary reducers instead of a parallel shaft cylindrical gear reducer to drive the roller press, the two planetary reducers weigh approximately 25 tons, resulting in a lighter overall weight, lower cost, and smaller equipment size, while providing the same output torque.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a planetary speed reducer specifically for a potassium ore roller press. Background Technology

[0002] Potash ore roller presses, also known as high-pressure roller mills, are a type of high-efficiency and energy-saving pulverizing equipment based on the principle of lamination pulverization. They use two opposing rotating extrusion rollers to apply extremely high pressure (typically 50-300 MPa) to the material, compressing it into a dense cake, thus achieving material pulverization.

[0003] Currently, potash ore roller presses are driven by hardened tooth surface parallel shaft cylindrical gear reducers. Due to their inherent structure, these reducers weigh approximately 35 tons, making them very heavy, bulky, and costly. Furthermore, the output shaft of the original hardened tooth surface parallel shaft cylindrical gear reducer requires a universal coupling to drive the roller press shaft, resulting in a long length and wasted space.

[0004] In view of this, it is necessary to improve the existing speed reducer to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a planetary reducer for potassium ore roller press.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a planetary reducer for a potash ore roller press, comprising a first planetary reducer and a second planetary reducer, wherein... The first planetary reducer includes a first housing, a first torque arm on the top of the first housing, the right end of the first torque arm extending to the right along the tangent of the first housing, a first connecting crank on the left side of the first housing, the upper end of the first connecting crank being connected to the left end of the first torque arm via a pin connection structure; the first housing has an output hole along the axial direction, a first input shaft parallel to the axis is provided on the left side of the output hole at the front end of the first housing, the first input shaft being connected to a first motor via a universal coupling; a first roller pressing shaft connection structure is provided in the output hole at the rear end of the first housing, which is connected to the first input shaft, and the first roller pressing shaft connection structure is connected to the roller pressing shaft of the roller press to realize torque transmission; The second planetary reducer includes a second housing. A second torque arm is located below the second housing. The left end of the second torque arm extends to the left along the tangent of the second housing, and its end is connected to the lower end of the first connecting crank via a pin connection structure. A second connecting crank is located on the right side of the second housing. The upper end of the second connecting crank is connected to the right end of the first torque arm via a pin connection structure, and the lower end of the second connecting crank is connected to the right end of the second torque arm via a pin connection structure. The second housing has an output hole along the axial direction. A second input shaft parallel to the axis is located on the right side of the output hole at the front end of the second housing. The second input shaft is connected to a second motor via a universal coupling. A second roller pressing shaft connection structure is located in the output hole at the rear end of the second housing and is connected to the roller pressing shaft of the roller press to realize torque transmission.

[0007] Furthermore, the first and second roller shaft connection structures are identical in structure, both including a hollow bushing, a locking disc, and locking bolts. The inner hole of the hollow bushing is a multi-stage stepped hole with a gradually decreasing inner diameter. A connecting flange is provided on the outer wall of the hollow bushing, and a locking disc is provided on the outer side of the connecting flange. A complementary wedge-shaped locking surface is provided between the connecting flange and the locking disc. There are multiple locking bolts, evenly arranged along the circumference of the connecting flange and the locking disc. Tightening the locking bolts causes the locking disc to move axially closer to the connecting flange, enabling the hollow bushing to radially lock the roller shaft.

[0008] Furthermore, the pin connection structure includes a pin, a baffle, a screw, and a bearing. The first torque arm, the second torque arm, and the first connecting crank and the second connecting crank are all provided with pin connection holes. The pin passes through the pin connection hole and is provided with a baffle at the end for limiting the pin. The baffle blocks the pin and prevents the pin from axially coming out of the pin connection hole. The baffle is locked by a screw.

[0009] The first torque arm, the second torque arm, and the first connecting crank and the second connecting crank are rotatably hinged at the pin connection structure position.

[0010] The first and second connecting cranks are separate components, making replacement relatively easy. Therefore, their pin connection holes do not require bearings. However, the first and second torque arms are integrally connected to the reducer housing. If they wear out, they cannot be replaced. Therefore, to further prevent wear between the pin and the first and second torque arms, bearings fitted onto the pin are provided in the pin connection holes of the first and second torque arms. The outer ring of the bearing is fixed to the first and second torque arms, and the inner ring is fixed to the pin.

[0011] During use, the torque arm experiences connecting forces, and prolonged exposure to these forces can easily lead to breakage, affecting its service life. To improve the reliability and lifespan of the torque arm connection, a first transition arc is provided at the connection point between the inner side of the first torque arm and the first housing, and a second transition arc is provided at the connection point between the inner side of the second torque arm and the second housing. The arcs at the connection points create a transition, preventing stress concentration and increasing the connection range with the housing, thereby ensuring the rigidity of the torque arm and preventing breakage at the connection point.

[0012] Furthermore, to reduce the lateral space occupied by the equipment, the first outer casing includes a first housing and a first end cap. A first flange is provided at the connection point of the first housing and the first end cap, and the two are connected and fixed via the first flange. The second outer casing includes a second housing and a second end cap. A second flange is provided at the connection point of the second housing and the second end cap, and the two are connected and fixed via the second flange. The opposite sides of both the first and second flanges are machined, forming a first cutting plane on the first flange and a second cutting plane on the second flange. By machining the flanges, the lateral dimension when two reducers are placed side-by-side can be reduced, thus reducing the space occupied.

[0013] Furthermore, the first torque arm is disposed on the first end cover near the first flange; the second torque arm is disposed on the second end cover near the second flange.

[0014] To facilitate loading and unloading using a crane, the first torque arm is further provided with a first lifting lug hole in the middle, and the second torque arm is provided with a second lifting lug hole in the middle, with the first and second lifting lug holes facing each other. The first and second lifting lug holes are located in the middle position to maintain the balance on both sides during lifting.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a special planetary reducer for a potash ore roller press, which uses two identical planetary reducers to replace the parallel shaft cylindrical gear reducer to drive the roller press. The weight of the two planetary reducers is about 25 tons, making the whole machine lighter, lower in cost, and smaller in size, while providing the same output torque. In addition, after using hollow shaft sleeves to connect the planetary reducers, the planetary reducers can be directly suspended on the roller press shaft without the need for universal couplings, saving about 2 meters of axial length. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the planetary reducer for potassium ore roller presses.

[0018] Figure 2This is a schematic diagram of the input side structure of the first planetary reducer.

[0019] Figure 3 This is a schematic diagram of the output side structure of the first planetary reducer.

[0020] Figure 4 This is a schematic diagram of a partial cross-section of the first planetary gear reducer.

[0021] Figure 5 This is a schematic diagram of the first roller pressure shaft connection structure.

[0022] Figure 6 This is a structural diagram of a pin connection structure.

[0023] In the diagram: 100, First planetary reducer; 200, Second planetary reducer; 1, First housing; 1.1, First housing; 1.2, First end cover; 1.3, First flange; 2, First input shaft; 3, First torque arm; 3.1, First lifting lug hole; 3.2, Pin shaft connection hole; 3.3, First transition arc; 4, First connecting crank; 5, Pin shaft connection structure; 5.1, Pin shaft; 5.2, Baffle; 5.3, Screw; 5.4, Bearing; 6, First roller pressing shaft connection structure; 6.1, Locking disc; 6.2, Hollow bushing; 6.3, Locking bolt; 6.4, Wedge-shaped locking surface; 6.5, Multi-stage stepped hole; 7, Second housing; 8, Second input shaft; 9, Second torque arm; 9.1, Second lifting lug hole; 10, Second connecting crank. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 As shown, this utility model discloses a planetary reducer for a potash ore roller press, comprising a first planetary reducer 100 and a second planetary reducer 200. In this embodiment, for ease of design, connection, and cost reduction, the first planetary reducer 100 and the second planetary reducer 200 adopt identical structures. This embodiment uses the first planetary reducer 100 as an example to illustrate its structure.

[0028] like Figure 2 and Figure 3 As shown, the first planetary reducer 100 includes a first housing 1, with a first torque arm 3 on top of the first housing 1. The right end of the first torque arm 3 extends to the right along the tangent direction of the first housing 1.1. A first connecting crank 4 is located on the left side of the first housing 1, and the upper end of the first connecting crank 4 is connected to the left end of the first torque arm 3 via a pin connection structure 5. The first housing 1 has an output hole along the axial direction. A first input shaft 2, parallel to the axis, is located on the left side of the output hole at the front end of the first housing 1. The first input shaft 2 is connected to a first motor via a universal coupling. A first roller pressing shaft connection structure 6, which is connected to the first input shaft 2, is located in the output hole at the rear end of the first housing 1. The first roller pressing shaft connection structure 6 is connected to the roller pressing shaft of the roller press to achieve torque transmission. During use, there will be a connecting force on the torque arm. Being under stress for a long time, it is prone to breakage, affecting its service life. To improve the reliability and service life of the torque arm connection, [further measures are needed]. The structure of the second planetary reducer 200 is the same as that of the first planetary reducer 100, which can be referred to. Figure 2 and Figure 3The structure is simply rotated 180° in orientation. The second planetary reducer 200 includes a second housing 7, with a second torque arm 9 below the second housing 7. The left end of the second torque arm 9 extends to the left along the tangent of the second housing, and its end is connected to the lower end of the first connecting crank 4 via a pin connection structure 5. A second connecting crank 10 is provided on the right side of the second housing 7. The upper end of the second connecting crank 10 is connected to the right end of the first torque arm 3 via a pin connection structure 5, and the lower end of the second connecting crank 10 is connected to the right end of the second torque arm 9 via a pin connection structure 5. The second housing 7 has an output hole along the axial direction. A second input shaft 8 parallel to the axis is provided on the right side of the output hole at the front end of the second housing 7. The second input shaft 8 is connected to the second motor via a universal coupling. A second roller pressing shaft connection structure is provided in the output hole at the rear end of the second housing 7 and is connected to the roller pressing shaft of the roller press to realize torque transmission. To facilitate loading and unloading using a crane, the first torque arm 3 is further provided with a first lifting lug hole 3.1 in the middle, and the second torque arm 9 is provided with a second lifting lug hole 9.1 in the middle, with the first lifting lug hole 3.1 and the second lifting lug hole 9.1 facing each other. The first lifting lug hole 3.1 and the second lifting lug hole 9.1 are located in the middle position to maintain the balance on both sides during lifting.

[0029] like Figure 1 As shown, furthermore, a first transition arc 3.3 is provided at the connection between the inner side of the first torque arm 3 and the first housing 1.1, and a second transition arc is provided at the connection between the inner side of the second torque arm 9 and the second housing. The transition formed by the arc at the connection avoids stress concentration and increases the connection range with the housing, thereby ensuring the rigidity of the torque arm and preventing breakage at the connection.

[0030] like Figure 4 and Figure 5 As shown, the first roller shaft connection structure 6 and the second roller shaft connection structure have the same structure, both including a hollow bushing 6.2, a locking disc 6.1, and locking bolts 6.3. The inner hole of the hollow bushing 6.2 is a multi-stage stepped hole 6.5 with a gradually decreasing inner diameter. A connecting flange is provided on the outer wall of the hollow bushing 6.2. A locking disc 6.1 is provided on the outer side of the connecting flange. A complementary wedge-shaped locking surface 6.4 is provided between the connecting flange and the locking disc 6.1. There are multiple locking bolts 6.3, which are evenly arranged along the circumference of the connecting flange and the locking disc 6.1. Tightening the locking bolts 6.3 makes the locking disc 6.1 approach the connecting flange axially, so that the hollow bushing 6.2 radially locks the roller shaft.

[0031] like Figure 4 and Figure 6As shown, the pin connection structure 5 includes a pin 5.1, a baffle 5.2, a screw 5.3, and a bearing 5.4. The first torque arm 3 and the second torque arm 9 are provided with pin connection holes 3.3 at the connection positions with the first connecting crank 4 and the second connecting crank 10. The pin 5.1 passes through the pin connection hole 3.3 and is provided with a baffle 5.2 at its end for limiting the pin. The baffle 5.2 blocks the pin 5.1 to prevent the pin 5.1 from axially coming out of the pin connection hole 3.3. The baffle 5.2 is locked by the screw 5.3.

[0032] The first connecting crank 4 and the second connecting crank 10 are separate components, making replacement relatively convenient. Therefore, their pin connection holes 3.3 do not require bearings 5.4. However, the first torque arm 3 and the second torque arm 9 are integrally connected to the reducer housing. If they wear out, they cannot be replaced. Therefore, to further prevent wear between the pin 5.1 and the first torque arm 3 and the second torque arm 9, the pin connection holes 3.3 of the first torque arm 3 and the second torque arm 9 are provided with bearings 5.4 sleeved on the pin 5.1. The outer ring of the bearing 5.4 is fixed to the first torque arm 3 and the second torque arm 9, and the inner ring is fixed to the pin 5.1.

[0033] like Figure 1 and Figure 4 As shown, to reduce the lateral space occupied by the equipment, the first housing 1 includes a first shell 1.1 and a first end cover 1.2. A first flange 1.3 is provided at the connection between the first shell 1.1 and the first end cover 1.2, and the two are connected and fixed through the first flange 1.3. The second housing 7 includes a second shell and a second end cover. A second flange is provided at the connection between the second shell and the second end cover, and the two are connected and fixed through the second flange. The opposite sides of the first flange 1.3 and the second flange are both machined, forming a first cutting plane on the first flange 1.3 and a second cutting plane on the second flange. By machining the flanges, the lateral dimension when the two reducers are placed side by side can be reduced, thus reducing the space occupied. The first torque arm 3 is located on the first end cover 1.2 near the first flange 1.3; the second torque arm 9 is located on the second end cover near the second flange.

[0034] During connection, the first input shaft 2 of the first planetary reducer 100 is connected to the first motor via a universal coupling, and the second input shaft 8 of the second planetary reducer 200 is connected to the second motor via a universal coupling. The rotation directions of the first motor and the second motor are opposite. The two roller shafts of the roller press are respectively connected to the hollow bushings 6.2 of the first planetary reducer 100 and the second planetary reducer 200, and then locked by the locking disc 6.1. The output torque directions of the first planetary reducer 100 and the second planetary reducer 200 are opposite, which enables the two roller shafts to rotate relative to each other, thereby realizing the crushing of potassium ore.

[0035] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A planetary reducer specifically for a potash ore roller press, characterized in that: Includes a first planetary gear reducer and a second planetary gear reducer, wherein, The first planetary reducer includes a first housing, a first torque arm on the top of the first housing, the right end of the first torque arm extending to the right along the tangent of the first housing, a first connecting crank on the left side of the first housing, the upper end of the first connecting crank being connected to the left end of the first torque arm via a pin connection structure; the first housing has an output hole along the axial direction, a first input shaft parallel to the axis is provided on the left side of the output hole at the front end of the first housing, the first input shaft being connected to a first motor via a universal coupling; a first roller pressing shaft connection structure is provided in the output hole at the rear end of the first housing, which is connected to the first input shaft, and the first roller pressing shaft connection structure is connected to the roller pressing shaft of the roller press to realize torque transmission; The second planetary reducer includes a second housing. A second torque arm is located below the second housing. The left end of the second torque arm extends to the left along the tangent of the second housing, and its end is connected to the lower end of the first connecting crank via a pin connection structure. A second connecting crank is located on the right side of the second housing. The upper end of the second connecting crank is connected to the right end of the first torque arm via a pin connection structure, and the lower end of the second connecting crank is connected to the right end of the second torque arm via a pin connection structure. The second housing has an output hole along the axial direction. A second input shaft parallel to the axis is located on the right side of the output hole at the front end of the second housing. The second input shaft is connected to a second motor via a universal coupling. A second roller pressing shaft connection structure is located in the output hole at the rear end of the second housing and is connected to the roller pressing shaft of the roller press to realize torque transmission.

2. The planetary reducer for potash ore roller presses as described in claim 1, characterized in that: The first and second roller shaft connection structures are identical in structure, both including a hollow bushing, a locking disc, and locking bolts. The inner hole of the hollow bushing is a multi-stage stepped hole with a gradually decreasing inner diameter. A connecting flange is provided on the outer wall of the hollow bushing, and a locking disc is provided on the outer side of the connecting flange. A complementary wedge-shaped locking surface is provided between the connecting flange and the locking disc. There are multiple locking bolts, which are evenly arranged along the circumference of the connecting flange and the locking disc. Tightening the locking bolts causes the locking disc to move axially closer to the connecting flange, thereby enabling the hollow bushing to radially lock the roller shaft.

3. The planetary reducer for potash ore roller presses as described in claim 1, characterized in that: The pin connection structure includes a pin, a baffle, a screw, and a bearing. The first torque arm and the second torque arm are provided with pin connection holes at the connection positions with the first connecting crank and the second connecting crank. The pin passes through the pin connection hole and has a baffle for limiting the position at its end. The baffle is locked by a screw.

4. The planetary reducer for potash ore roller presses as described in claim 3, characterized in that: The first torque arm and the second torque arm are provided with bearings sleeved on the pins in the pin connection holes. The outer ring of the bearing is fixed to the first torque arm and the second torque arm, and the inner ring is fixed to the pin.

5. The planetary reducer for potash ore roller presses as described in claim 1, characterized in that: The first torque arm has a first transition arc at the connection between its inner side and the first housing, and the second torque arm has a second transition arc at the connection between its inner side and the second housing.

6. The planetary reducer for potash ore roller presses as described in claim 5, characterized in that: The first outer shell includes a first housing and a first end cap. The connection between the first housing and the first end cap is provided with a first flange, and the two are connected and fixed by the first flange. The second outer shell includes a second housing and a second end cap. The connection between the second housing and the second end cap is provided with a second flange, and the two are connected and fixed by the second flange. The opposite sides of the first flange and the second flange are both cut to form a first cutting plane on the first flange and a second cutting plane on the second flange.

7. The planetary reducer for potash ore roller presses as described in claim 6, characterized in that: The first torque arm is located on the first end cover near the first flange; the second torque arm is located on the second end cover near the second flange.

8. The planetary reducer for potash ore roller presses as described in claim 1, characterized in that: The first torque arm has a first lifting lug hole in the middle, and the second torque arm has a second lifting lug hole in the middle, with the first lifting lug hole and the second lifting lug hole facing each other.

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