Coal mining machine drum with double-drum box type frame structure

Abstract

The utility model relates to a coal mining machine drum with a double-drum box-type frame structure, which comprises a drum body with a double-layer structure, the drum body comprises an outer drum ring, an inner drum ring and a tail reinforcing ring, the outer drum ring and the inner drum ring are coaxially arranged and are spaced from each other in the radial direction, an inner hole of the inner drum ring is a taper hole with a small front part and a large rear part, and the tail reinforcing ring is arranged at the tail part of the drum body. The roller body comprises an outer roller ring and an inner roller ring, the rear ends of the outer roller ring and the inner roller ring are fixedly connected through the tail reinforcing ring, the roller body further comprises a plurality of reinforcing partition plates, the reinforcing partition plates are distributed in a central radial mode with the axis of the roller body as the axis, and an annular space defined by the outer roller ring, the inner roller ring and the tail reinforcing ring is divided into a plurality of fan-shaped box bodies. According to the utility model, the abrasion of the planetary mechanism and the gravity center deviation of the spiral drum caused by the accumulation of coal dust between the planetary mechanism and the drum body can be effectively prevented, so that the service lives of the drum and the coal mining machine can be prolonged.

Description

Technical Field

[0001] This utility model relates to a coal mining machine drum, particularly a large-diameter coal mining machine spiral drum, and belongs to the field of coal mining machine technology. Background Technology

[0002] The coal mining machine drum is a key component of the machine, and its quality directly affects the coal mining efficiency of the fully mechanized mining unit. Traditional coal mining machine spiral drums consist of a drum body, combined spiral blades mounted on the drum body, and combined cutting teeth mounted on the spiral blades. Traditional spiral drums often have a reinforcing ring welded to the inner edge of the rear end of the drum body to prevent large amounts of coal dust from entering from the rear. However, due to the radial gap between the reinforcing ring and the planetary mechanism located within the drum body cavity when installed, coal dust can still enter the drum body cavity through this gap and eventually accumulate between the drum body and the planetary mechanism, especially in the front corner of the reinforcing ring, where it cannot be discharged. The accumulated coal tumbles within the drum body as it rotates, causing wear on the planetary mechanism, and this structure also hinders the timely detection of faults such as oil leaks in the planetary mechanism. The accumulated coal at the bottom of the drum body causes the drum's center of gravity to deviate from its axis, resulting in eccentric vibration of the drum, reducing its cutting performance, and shortening the service life of the coal mining machine's rocker arm. Utility Model Content

[0003] The purpose of this invention is to provide a double-cylinder box-type frame structure coal mining machine drum, which can effectively prevent wear of the planetary mechanism and deviation of the spiral drum center of gravity caused by coal dust accumulation between the planetary mechanism and the inner cylinder ring, thus improving the service life of the drum and the coal mining machine.

[0004] The main technical solutions of this utility model are as follows:

[0005] A double-cylinder box-type frame structure coal mining machine drum includes a double-layer drum body. The drum body includes an outer cylinder ring, an inner cylinder ring, and a tail reinforcing ring. The outer cylinder ring and the inner cylinder ring are coaxially arranged and have a radial gap between them. The inner hole of the inner cylinder ring is a tapered hole with a smaller front and a larger rear. The outer cylinder ring and the inner cylinder ring are fixedly connected at their respective rear ends by the tail reinforcing ring.

[0006] The roller body preferably includes reinforcing partitions, and multiple reinforcing partitions are distributed radially around the axis of the roller body, dividing the annular space enclosed by the outer ring, inner ring and tail reinforcing ring into multiple sector-shaped boxes.

[0007] The reinforcing partition is preferably a hollowed-out structural board in the middle of the board surface.

[0008] The roller body also includes a connecting plate, which is fixed to the front end of the inner ring and the front inner wall of the outer ring. The core of the connecting plate is provided with a square hole.

[0009] The outer cylindrical surface of the drum body is fixedly connected with an end disc and combined spiral blades, wherein the end disc is located at the front end of the outer cylinder ring, and the combined spiral blades are located behind the end disc.

[0010] A plurality of tooth seats and tooth pick assemblies are fixedly and spacedly installed on the outer cylindrical surface of the end disc and the combined spiral blades, wherein the tooth seat and the tooth pick assembly comprise a tooth seat, a tooth sleeve and a tooth pick, the tooth sleeve is installed in the tooth seat, and the tooth pick is installed in the tooth sleeve.

[0011] The tooth pick is a pick-shaped tooth pick or a flat-shaped tooth pick.

[0012] The double-cylinder box frame structure coal mining machine drum further comprises an end cover, which is fixedly connected to the inner wall of the outer cylinder ring and the front side of the connecting disc.

[0013] The double-cylinder box frame structure coal mining machine drum has the following beneficial effects:

[0014] Compared with the traditional single-layer structure drum body, the double-layer structure drum body comprising the outer cylinder ring and the inner cylinder ring reduces the space between the drum body and the planetary mechanism, and the inner hole of the inner cylinder ring is a taper hole with a small front end and a large rear end, so that the coal dust between the planetary mechanism and the inner cylinder ring can be automatically and effectively discharged, thereby avoiding the accumulation of coal in the drum body and the abrasion of the planetary mechanism caused by the accumulated coal and the deviation of the drum center of gravity caused by the accumulated coal.

[0015] The drum body of the double-layer structure is further provided with circumferentially spaced reinforcing partitions, which significantly improve the strength of the drum body and prolong the service life of the drum. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a sectional view of an embodiment of the utility model;

[0017] Figure 2 is Figure 1 is a sectional view of the drum body in

[0018] REFERENCE SIGNS:

[0019] 1, tooth seat and tooth pick assembly; 2, end disc; 3, spiral blade; 4, drum body; 41, connecting disc; 42, outer cylinder ring; 43, reinforcing partition; 44, inner cylinder ring; 45, tail reinforcing ring; 5, end cover. DETAILED DESCRIPTION

[0020] The utility model discloses a double-cylinder box frame structure coal mining machine drum, like Figure 1 , 2As shown, the drum body 4 comprises a double-layer structure, which comprises an outer cylinder 42, an inner cylinder 44 and a tail reinforcing ring 45. The outer cylinder and the inner cylinder are coaxially arranged and are spaced apart in the radial direction. The inner hole of the inner cylinder is a tapered hole with a larger rear end. The outer cylinder and the inner cylinder are fixedly connected at the respective rear ends through the tail reinforcing ring, that is, the rear annular opening of the space between the outer cylinder and the inner cylinder is blocked by the tail reinforcing ring. Accordingly, the drum body can be referred to as a double-cylinder body structure drum body. Since the drum body adopts a double-layer structure, compared with a conventional single-layer structure drum body, in the case that the size of the outer cylinder is the same as that of the cylinder of the single-layer structure drum body, the radial space between the drum body and the planetary mechanism is reduced. At the same time, since the inner hole of the inner cylinder has a certain taper, the coal dust that has entered between the planetary mechanism and the drum body can be effectively discharged, so that the coal accumulation in the drum body can be avoided, and the wear of the planetary mechanism caused by the coal accumulation and the deviation of the center of gravity of the drum caused by the coal accumulation can be avoided.

[0021] The drum body is preferably further provided with reinforcing partitions 43. A plurality of reinforcing partitions are distributed in a central radial manner with the axis of the drum body as the axis, and divide the annular space surrounded by the outer cylinder, the inner cylinder and the tail reinforcing ring into a plurality of sector-shaped boxes. The drum body formed can be referred to as a double-cylinder box-type frame structure drum body. Since the reinforcing partitions are provided, the strength of the drum body is further improved, and the service life of the drum is further prolonged. The reinforcing partitions are welded with the inner cylinder, the outer cylinder and the tail reinforcing ring.

[0022] The reinforcing partitions are preferably hollow structure plates with a hollow structure in the middle of the plate surface, which can reduce the weight of the drum and reduce welding deformation without reducing the structural strength of the drum body.

[0023] The drum body further comprises a connecting disc 41, which is fixed to the front end of the inner cylinder and the inner wall of the front part of the outer cylinder. The core of the connecting disc is provided with a square hole. The connecting disc is in contact with the inner cylinder.

[0024] The outer cylindrical surface of the drum body is fixedly connected with an end disc 2 and a combined spiral blade 3. The end disc is located at the front end of the outer cylinder, and the combined spiral blade is located behind the end disc.

[0025] A plurality of tooth seats and tooth pick assemblies 1 are fixedly installed on the outer cylindrical surface of the end disc and the combined spiral blade in intervals. The tooth seat and the tooth pick assembly comprise a tooth seat, a tooth sleeve and a tooth pick. The tooth sleeve is installed in the tooth seat, and the tooth pick is installed in the tooth sleeve.

[0026] The tooth pick can be a pick-shaped tooth pick or a flat tooth pick.

[0027] The double-cylinder box-type frame structure drum further comprises an end cover 5, which is fixedly connected to the inner wall of the outer cylinder and the front side of the connecting disc.

[0028] All the connections in this document are preferably welded.

[0029] As referred to herein, front and rear refer to the direction in which the drum of the shearer points towards the coal wall and away from the coal wall when the drum is in a working condition.

Claims

1. A twin barrel box frame structure shearer drum characterised in that: The drum body comprises a double-layer structure, the drum body comprises an outer cylinder, an inner cylinder and a tail reinforcing ring, the outer cylinder and the inner cylinder are coaxially arranged and are spaced apart in the radial direction, the inner hole of the inner cylinder is a taper hole with a small front end and a large rear end, and the outer cylinder and the inner cylinder are fixedly connected by the tail reinforcing ring at the rear ends of the outer cylinder and the inner cylinder.

2. A twin drum box frame structure shearer drum as claimed in claim 1 wherein: The drum body further comprises reinforcing partitions, a plurality of reinforcing partitions are distributed in a central radial manner with the axis of the drum body as the axis, and an annular space surrounded by the outer cylinder, the inner cylinder and the tail reinforcing ring is divided into a plurality of sector-shaped boxes.

3. A twin drum box frame structure shearer drum as claimed in claim 2 wherein: The reinforcing partition is a hollow structure plate with a plate surface.

4. A twin drum box frame structure shearer drum as claimed in claim 3 wherein: The drum body further comprises a connecting disc, the connecting disc is fixed to the front end of the inner cylinder and the inner wall of the front part of the outer cylinder, and a square hole is arranged in the core of the connecting disc.

5. A twin drum box frame structure shearer drum as claimed in claim 4 wherein: An end disc and a combined spiral blade are fixedly connected to the outer cylindrical surface of the drum body, the end disc is located at the front end of the outer cylinder, and the combined spiral blade is located behind the end disc.

6. A twin drum box frame structure shearer drum as claimed in claim 5 wherein: A plurality of tooth seats and tooth cutting assembly are fixedly installed on the outer cylindrical surface of the end disc and the combined spiral blade at intervals, the tooth seat and the tooth cutting assembly comprise a tooth seat, a tooth sleeve and a tooth cutter, the tooth sleeve is installed in the tooth seat, and the tooth cutter is installed in the tooth sleeve.

7. A twin drum box frame structure shearer drum as claimed in claim 6 wherein: The tooth cutter is a pick-shaped tooth cutter or a flat-shaped tooth cutter.

8. A twin drum box frame structure shearer drum as claimed in claim 7 wherein: An end cover is further provided, the end cover is fixedly connected to the inner wall of the outer cylinder and the front side of the connecting disc.

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