A new type of head sheave for mine hoist

Abstract

The invention discloses a novel sheave for a mine hoist, comprising a wheel hub, a wheel rim, a wheel spoke and a copper shoe. The wheel hub comprises two groups of mutually symmetrical semicircular wheel hub assemblies, the two groups of semicircular wheel hub assemblies are assembled to form the wheel hub, each group of semicircular wheel hub assemblies comprises two semicircular plates of the same shape and size, a gap is left between the two semicircular plates, at least two connecting blocks are arranged in the gap, the connecting blocks are respectively welded to the two semicircular plates, semicircular reinforcing plates are welded on the outer sides of the two semicircular plates, the outer diameter of the reinforcing plates is smaller than the outer diameter of the semicircular plates, the design structure of the invention is simple, the wheel hub of the traditional casting structure is designed as a welded structure, the overall weight of the wheel hub and the sheave of the same size is effectively reduced, and the key connection method between the copper shoe and the wheel hub is used to replace the traditional bolt connection method, so as to avoid frequent maintenance of the sheave, which is beneficial to extending the service life of the sheave.

Description

Technical Field

[0001] The invention belongs to the technical field of mine hoist component design, and in particular relates to a novel head sheave for a mine hoist. Background Art

[0002] Mine hoist refers to the main transportation equipment that connects the underground and the ground in mining projects. Mine hoist is a lifting machine installed on the ground, which drives the lifting container along the shaft or ramp with the help of wire rope. It is used to lift coal, ore, gangue in vertical and inclined shafts, as well as to lift and lower personnel, materials, tools and equipment, etc.

[0003] The sky sheave is a fixed pulley at the top of the mine shaft frame that adjusts the direction of the wire rope movement. Its function is to support the wire rope connecting the hoist drum and the hoisting container and guide the wire rope to turn. There are three types of sky sheaves: floating sky sheave, fixed sky sheave above the well, and fixed sky sheave for drilling and underground. The types of wire ropes that match the sky sheave include phosphate coated wire rope, galvanized wire rope or smooth wire rope.

[0004] In order to increase the load capacity of the hoist, it is often necessary to increase the diameter of the sheave. The hub of the traditional large-diameter sheave is mostly a casting structure, which has the defects of heavy weight, long processing cycle, and difficult repair after wear. In addition, a copper sleeve is often provided in the hub, and the copper sleeve is mostly installed by bolting it to the end face of the hub. During operation, these bolts are easily cut off by shear stress, affecting the normal use of the hoist. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a new type of sheave for mine hoist, which has a simple design structure and reasonable operation. The wheel hub of the traditional casting structure is designed as a welded structure, which effectively reduces the overall weight of the wheel hub and the sheave of the same size, and utilizes a key connection between the copper tile and the wheel hub to replace the traditional bolt connection, thereby avoiding frequent maintenance of the sheave and helping to extend the service life of the sheave.

[0006] The technical solution adopted by the present invention is: a new type of sheave for a mine hoist, including a hub, a rim, a spoke and a copper tile, the hub including two groups of semicircular hub assemblies symmetrical to each other, the two groups of semicircular hub assemblies are assembled to form a hub, each group of semicircular hub assemblies includes two semicircular plates of the same shape and size, a gap is left between the two semicircular plates, at least two connecting blocks are arranged in the gap, the connecting blocks are respectively welded to the two semicircular plates, semicircular reinforcing plates are welded on the outer sides of the two semicircular plates, the outer diameter of the reinforcing plates is smaller than the outer diameter of the semicircular plates, the center of the reinforcing plates coincides with the center of the semicircular plates, and the gap between the two semicircular plates is welded There are two bolt mounting rods parallel to each other, and a bolt connection hole is opened in the center of the bolt mounting rods. Two groups of symmetrical semicircular hub assemblies are connected by bolts installed in the bolt connection holes. A key block is fixedly installed on the connecting block between the two semicircular plates of one group of semicircular hub assemblies, and a copper tile is installed in the center of the hub. The outer circular surface of the copper tile is integrally connected with an annular positioning protrusion, and the positioning protrusion is opened with a key groove matching the key block; the outer side surface of the semicircular plate of the hub is welded with a spoke, and the end of the spoke is welded with a rim, and the rim includes two semicircular arc plates spliced ​​together, and a connecting plate for connecting the two arc plates is provided at the joint of the two guard plates.

[0007] An oil groove is arranged at the inner diameter of the copper bushing, which can play a role of lubrication when the hub is installed on the main shaft of the hoist.

[0008] An annular positioning stop is provided at the inner diameter position of one side of the semicircular plate of the hub close to the connecting block, and two end surfaces of the positioning protrusion of the copper shoe are fitted and installed at the position of the positioning stop.

[0009] The wheel spokes are channel steels.

[0010] When working, the main shaft of the hoist passes through the wheel hub and is connected with the copper washers. Since the copper washers and the wheel hub are connected by keys, they can replace the traditional bolt connection method, ensure the stability of power transmission, and extend the service life of the copper washers. The rotation of the main shaft drives the wheel hub to rotate, and the wheel speed then drives the rim to rotate. The rope arranged around the rim rises at one end and falls at the other end under the rotation of the rim. Since the wheel hub is a welded structure and is welded to the rim by spokes, the weight of the entire sheave can be reduced while ensuring the working strength. At the same time, the production time of the wheel hub and rim is also shortened, which is conducive to improving work efficiency. In addition, when the wheel hub or rim is damaged, only the damaged part needs to be replaced without replacing the entire wheel hub or rim, which effectively reduces the maintenance cost.

[0011] The wheel hub comprises two groups of mutually symmetrical semicircular wheel hub assemblies, which are assembled to form the wheel hub; the purpose of such arrangement is to be able to replace one of the semicircular wheel hub assemblies when it is damaged, thereby avoiding the scrapping of the entire wheel hub; at the same time, such structural design is more convenient for production and processing, reduces the production difficulty, and shortens the production cycle.

[0012] Each group of semicircular wheel hub assemblies includes two semicircular plates of the same shape and size, with a gap between the two semicircular plates. At least two connecting blocks are arranged in the gap, and the connecting blocks are respectively welded to the two semicircular plates. The purpose of this arrangement is to connect the two semicircular plates through the connecting blocks, thereby ensuring the strength while also utilizing the gap to reduce the overall weight of the wheel hub.

[0013] Semicircular reinforcement plates are welded on the outer sides of the two semicircular plates. The outer diameter of the reinforcement plates is smaller than the outer diameter of the semicircular plates, and the center of the reinforcement plates coincides with the center of the semicircular plates. The purpose of this arrangement is to increase the working strength of the center of the wheel hub, reduce the chance of damage, and help extend the service life of the wheel hub.

[0014] Two parallel bolt mounting rods are arranged in the gap between the two semicircular plates, and a bolt connection hole is opened in the center of the bolt mounting rod. Two groups of symmetrical semicircular wheel hub assemblies are connected by bolts installed in the bolt connection holes. The purpose of such arrangement is: after each group of semicircular wheel hub assemblies is assembled, the two semicircular wheel hub assemblies are fastened together by bolts to form the wheel hub.

[0015] A key block is fixedly installed on the connecting block between the two semicircular plates of one group of semicircular wheel hub assemblies, a copper washer is installed at the center of the wheel hub, an annular positioning protrusion is integrally connected to the outer circular surface of the copper washer, and a key slot matching the key block is provided on the positioning protrusion; the purpose of this arrangement is to replace the traditional bolt connection method when installing the copper washer, so that the connection between the copper washer and the wheel hub is more firmly, avoiding the phenomenon of bolt breakage and reducing maintenance costs.

[0016] The outer side of the semicircular plate of the hub is welded with a spoke, and the end of the spoke is welded with a rim. The rim consists of two semicircular arc plates spliced ​​together, and a connecting plate for connecting the two arc plates is provided at the joint of the two guard plates. The purpose of this arrangement is to facilitate the assembly and processing of the rim and ensure its processing accuracy requirements.

[0017] The beneficial effects of the present invention are as follows: the present invention has a simple design structure, and designs the wheel hub of the traditional casting structure into a welded structure, which effectively reduces the overall weight of the wheel hub and the sheave of the same size, and utilizes the key connection method between the copper bushing and the wheel hub to replace the traditional bolt connection method, thereby avoiding frequent maintenance of the sheave and avoiding the problem of shearing of the barrel bushing connection bolts that often occurs in the traditional structure, which is beneficial to extending the service life of the sheave. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2 It is a three-dimensional diagram of the copper tile of the present invention;

[0020] Figure 3 is a three-dimensional diagram of the wheel hub of the present invention;

[0021] Figure 4 It is a half-section view of the wheel hub of the present invention.

[0022] Markings in the figure: 1. Spoke; 2. Wheel rim; 3. Hub; 4. Copper tile; 5. Connecting plate; 6. Positioning protrusion; 7. Keyway; 8. Oil groove; 9. Reinforcement plate; 10. Semicircular plate; 11. Bolt mounting rod; 12. Bolt connection hole; 13. Positioning stop; 14. Connecting block; 15. Key block. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0024] As shown in the figure, a new type of sheave for a mine hoist includes a hub 3, a rim 2, a spoke 1 and a copper tile 4. The hub 3 includes two groups of semicircular hub 3 components that are symmetrical to each other. The two groups of semicircular hub 3 components are assembled to form the hub 3. Each group of semicircular hub 3 components includes two semicircular plates 10 with the same shape and size. A gap is left between the two semicircular plates 10. At least two connecting blocks 14 are arranged in the gap. The connecting blocks 14 are respectively welded to the two semicircular plates 10. Semicircular reinforcing plates 9 are welded to the outer surfaces of the two semicircular plates 10. The outer diameter of the reinforcing plates 9 is smaller than the outer diameter of the semicircular plates 10. The center of the reinforcing plates 9 coincides with the center of the semicircular plates 10. Two bolt mounting rods 1 parallel to each other are welded in the gap between the two semicircular plates 10. 1. A bolt connection hole 12 is provided at the center of the bolt mounting rod 11. Two groups of symmetrical semicircular hub 3 components are connected by bolts installed in the bolt connection hole 12. A key block 15 is fixedly installed on the connecting block 14 between the two semicircular plates 10 of one group of semicircular hub 3 components. A copper tile 4 is installed at the center of the hub 3. An annular positioning protrusion 6 is integrally connected to the outer circumferential surface of the copper tile 4. A key groove 7 matching with the key block 15 is provided on the positioning protrusion 6. A spoke 1 is welded to the outer side surface of the semicircular plate 10 of the hub 3. A rim 2 is welded to the end of the spoke 1. The rim 2 includes two semicircular arc plates spliced ​​together. A connecting plate 5 for connecting the two arc plates is provided at the joint of the two arc plates. The connecting plate 5 connects the two arc plates by bolts.

[0025] An oil groove 8 is provided at the inner diameter of the copper shoe 4, which can play a lubricating role when the hub 3 is installed on the main shaft of the hoist.

[0026] The inner diameter position of the semicircular plate 10 of the hub 3 on one side close to the connecting block 14 is provided with an annular positioning stop 13. The two end faces of the positioning protrusion 6 of the copper washer 4 are fitted and installed at the position of the positioning stop 13 to limit the axial movement of the copper washer 4. The key block 15 limits the circumferential rotation of the copper washer 4 to complete the positioning of the copper washer 4.

[0027] The wheel spoke 1 is a channel steel.

[0028] During operation, the main shaft of the hoist passes through the wheel hub 3 and is connected with the copper washer 4. Since the copper washer 4 and the wheel hub 3 are connected by a key, it can replace the traditional bolt connection method, ensure the stability of power transmission, and extend the service life of the copper washer 4. The rotation of the main shaft drives the wheel hub 3 to rotate, and the wheel speed then drives the rim 2 to rotate. The rope arranged around the rim 2 rises at one end and falls at the other end under the rotation of the rim 2. Since the wheel hub 3 is a welded structure and is welded to the rim 2 by the spokes 1, the weight of the entire sheave can be reduced while ensuring the working strength. At the same time, the production time of the wheel hub 3 and the rim 2 is also shortened, which is conducive to improving work efficiency. In addition, when the wheel hub 3 or the rim 2 is damaged, only the damaged part needs to be replaced without replacing the entire wheel hub 3 or the rim 2, which effectively reduces the maintenance cost.

Claims

1. A sheave for a mine hoist, characterized in that: The wheel hub comprises a wheel hub, a wheel rim, a wheel spoke and a copper tile. The wheel hub comprises two groups of semicircular wheel hub assemblies which are symmetrical to each other. The two groups of semicircular wheel hub assemblies are assembled to form a wheel hub. Each group of semicircular wheel hub assemblies comprises two semicircular plates of the same shape and size. A gap is left between the two semicircular plates. At least two connecting blocks are arranged in the gap. The connecting blocks are respectively welded to the two semicircular plates. Semicircular reinforcing plates are welded on the outer surfaces of the two semicircular plates. The outer diameter of the reinforcing plates is smaller than the outer diameter of the semicircular plates. The center of the reinforcing plates coincides with the center of the semicircular plates. Two bolt mounting rods parallel to each other are welded in the gap between the two semicircular plates. A bolt connection hole is provided at the center of the bolt mounting rod, and two groups of symmetrical semicircular hub assemblies are connected by bolts installed in the bolt connection hole. A key block is fixedly installed on the connection block between the two semicircular plates of one group of semicircular hub assemblies, and a copper tile is installed at the center of the hub. An annular positioning protrusion is integrally connected to the outer circumferential surface of the copper tile, and a key slot matching the key block is provided on the positioning protrusion; a spoke is welded on the outer side of the semicircular plate of the hub, and a rim is welded at the end of the spoke. The rim is composed of two semicircular arc plates spliced ​​together, and a connecting plate for connecting the two arc plates is provided at the splicing position of the two guard plates; An oil groove is provided at the inner diameter of the copper tile; An annular positioning stop is arranged at the inner diameter position of one side of the semicircular plate of the hub close to the connecting block, and two end surfaces of the positioning protrusion of the copper shoe are matched and installed at the position of the positioning stop.

2. A sheave for a mine hoist according to claim 1, characterized in that: The spokes are channel steel.

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