Lower frame body structure of gyratory crusher

Abstract

The utility model relates to a lower frame body structure of a gyratory crusher, which belongs to the technical field of gyratory crushers and comprises a frame body, a gear shell and a box-shaped rib, the box-shaped ribs are uniformly distributed along the periphery of the frame body and are connected between the frame body and the gear shell; the number of the box-shaped ribs is at least two. The box-shaped rib comprises side ribs on the two sides and an arc-shaped transverse rib connected to the upper ends of the side ribs on the two sides. According to the utility model, the gear shell is connected with the frame body through the box-shaped ribs, so that the maximum stress of the frame body is reduced from 62Mpa to 42Mpa; the oil return port of the frame body is changed into the oblong hole, so that the cracking phenomenon at the oil return port is effectively reduced; according to the structure, the strength of the lower frame body of the gyratory crusher is effectively improved, the cracking probability is reduced, the operation rate of the lower frame body of the gyratory crusher is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of gyratory crushers, specifically, it relates to a lower frame structure of a gyratory crusher. Background Technology

[0002] The lower frame of the gyratory crusher is the main support and load-bearing structure of the crusher, which directly affects the stability, durability and working efficiency of the crusher.

[0003] The existing gyratory crusher lower frame is prone to cracking or deformation, especially at the connection between the gear housing and the frame, and at the oil return port. The existing gyratory crusher lower frame structure connects the gear housing and the frame via a single-rib (see attached diagram). Figure 5 The connection is prone to cracking; the oil return port is rectangular, and the four right angles of the rectangular oil hole are stress concentration points. In actual use, cracks are often found in the frame at these points.

[0004] Beyond the problems listed above, the existing gyratory crusher's lower frame is not strong enough and is prone to cracks or deformation. Once cracks or breaks occur, the machine needs to be shut down for maintenance, which greatly affects normal production. Summary of the Invention

[0005] To overcome the problems existing in the background technology, this utility model provides a lower frame structure for a gyratory crusher. By connecting the gear housing and the frame with box-shaped ribs, the maximum stress of the frame is reduced from 62 MPa to 42 MPa. Furthermore, the oil return port of the frame is changed to an oblong hole, which effectively reduces the cracking phenomenon at the oil return port. The structure of this utility model effectively increases the strength of the lower frame of the gyratory crusher, reduces the probability of cracking, improves the operating rate of the lower frame of the gyratory crusher, and reduces maintenance costs.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] The lower frame structure of the gyratory crusher includes a frame, a gear housing, and box-shaped ribs; the frame is inside and the gear housing is outside, and the two are coaxially arranged; the box-shaped ribs are connected between the frame and the gear housing, and are evenly distributed along the outer periphery of the frame; the box-shaped ribs include side ribs on both sides and arc-shaped ribs connected to the upper ends of the side ribs on both sides.

[0008] Preferably, three box-shaped reinforcing bars are provided.

[0009] Preferably, the oil return port of the frame is an oblong hole.

[0010] Preferably, the frame is cylindrical; the gear housing is provided with reinforcing ribs.

[0011] Preferably, the lower end of the gear housing is longer than the frame.

[0012] The beneficial effects of this utility model are:

[0013] This invention effectively reduces cracking at the oil return port by connecting the gear housing and the frame with box-shaped ribs and changing the oil return port of the frame to an oblong hole. The structure of this invention effectively increases the strength of the lower frame of the gyratory crusher, reduces the maximum stress of the frame from 62 MPa to 42 MPa, reduces the probability of cracking, improves the operating rate of the lower frame of the gyratory crusher, and reduces maintenance costs. Attached Figure Description

[0014] Figure 1 This is a side view of the present invention;

[0015] Figure 2 This is a top view (partial view) of the present invention;

[0016] Figure 3 This is a schematic diagram of the box-shaped rib structure of this utility model;

[0017] Figure 4 This is a side view of the lower frame structure before the improvement;

[0018] Figure 5 This is a schematic diagram of the original 1-rib structure;

[0019] Figure 6 This is a finite element analysis of the lower frame of the gyratory crusher before the frame was improved (maximum stress 62MPa).

[0020] Figure 7 This is a finite element analysis of the lower frame of the gyratory crusher of this utility model (maximum stress 43MPa).

[0021] In the diagram, 1-frame, 2-gear housing, 3-box-shaped rib, 4-oil return port, 5-reinforcing rib, 6-gear observation hole, 7-I-shaped rib. Detailed Implementation

[0022] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0023] In the description of this utility model, unless otherwise stated, the terms "upper" and "lower" indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "equipped with" 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. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] like Figure 1-3 As shown, the lower frame structure of the gyratory crusher includes a frame 1, a gear housing 2, and a box-shaped rib 3.

[0026] The frame 1 is cylindrical, with the frame 1 inside and the gear housing 2 outside. The two are coaxially arranged, and the gear housing 2 is provided with reinforcing ribs 5.

[0027] Box-shaped ribs 3 connect the frame 1 and the gear housing 2, and three are evenly distributed along the outer perimeter of the frame 1. In the original design, the connecting ribs between the frame 1 and the gear housing 2 were S-shaped ribs (as shown in the attached diagram). Figure 5 During use, cracks frequently appeared at the joints of the ribs (1) in the frame or gear housing (2). By replacing the ribs with box-shaped ribs (3), finite element analysis was performed on the frame after the modification to simulate the on-site working conditions: the maximum stress of the frame before the modification reached 62 MPa (see...). Figure 6 The maximum stress of the modified frame is 43 MPa (see...). Figure 7 The stress was reduced by 32.26%, indicating that by using box-shaped reinforcement 3, the strength of the lower frame was significantly improved under the condition that the weight of the frame was basically the same, which can effectively improve the service life of the lower frame.

[0028] Box-shaped reinforcement 3 includes side reinforcement on both sides and arc-shaped reinforcement connecting the upper ends of the side reinforcement on both sides, as detailed in the appendix. Figure 3 .

[0029] The original oil return port of frame 1 was rectangular. Rectangular oil holes create stress concentration points at their four right angles, leading to frequent cracking of the frame at these locations during actual use. Statistics showed that cracks began to appear at the oil return port on average every 6-8 months of use. By changing the oil return port to an oblong shape, while maintaining the same effective oil return flow area, cracking at the oil return port was effectively prevented, thus extending the service life of the lower frame. After 24 months of actual use, no cracks were observed at the oil return port.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A lower frame structure of a gyratory crusher, characterized in that, Including frame (1), gear housing (2) and box-shaped rib (3); the frame (1) is inside, the gear housing (2) is outside, both coaxial settings;The box-shaped rib (3) is connected between the frame (1) and the gear housing (2), and is evenly distributed along the outer periphery of the frame (1);The box-shaped rib (3) includes two side ribs and an arc-shaped rib connected to the upper end of the two side ribs.

2. The gyratory crusher undercarriage structure of claim 1, wherein, The box-shaped rib (3) is provided with three.

3. The gyratory crusher undercarriage structure of claim 1, wherein, The oil return port (4) of the frame (1) is an oblong hole.

4. The gyratory crusher undercarriage structure of claim 1, wherein, The frame (1) is cylindrical;The frame (1) and the gear housing (2) are both provided with reinforcing ribs (5) outside.

5. The gyratory crusher undercarriage structure of claim 1, wherein, The lower end of the gear housing (2) is longer than the frame (1).

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