Head sheave device of multi-rope friction hoist

Abstract

The utility model discloses a head sheave device of a multi-rope friction hoister, which is characterized in that two ends of a head sheave shaft are supported on a bearing seat, a main bearing is arranged in the bearing seat, a fixed wheel is fixedly arranged on one side of the head sheave shaft through a flat key, and at least one traveling wheel is arranged on the same side of the head sheave shaft close to the fixed wheel side by side. Two sets of rolling bearings and two sets of thrust bearings are arranged between each moving hub and the head sheave shaft; according to the device, sealing grooves and sealing ring structures are additionally arranged between the fixed hub and the moving hub, so that lubricating oil is prevented from leaking from a gap between the moving hub and the fixed hub; the thrust bearing and the rolling bearing are used in a combined mode to bear the radial load and the axial thrust of the head sheave in the operation process, the axial mutual position between the head sheave shaft and the head sheave is kept to limit axial movement, the axial positioning effect is achieved, the head sheave device is stable in operation, flexible in rotation, free of jamming and maintenance, and the service life of the head sheave device is prolonged. And the maintenance cost of the head sheave device is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoists, and in particular relates to a head sheave device of a multi-rope friction hoist. Background Art

[0002] The head sheave device is one of the important load-bearing components of a multi-rope friction hoist. Its function is to support the friction steel rope connecting the hoist drum and the hoisting container and to guide the steel rope to turn. It is mainly used to support and guide the steel rope.

[0003] The traditional sheave device of a multi-rope friction hoist is mainly composed of a bearing seat, a main bearing, a sheave shaft, a fixed sheave and a floating sheave. The fixed sheave on the left end is connected to the sheave shaft by a flat key, and the floating sheave on the right side is usually installed on the sheave shaft by directly cooperating with the sheave shaft. A copper bearing is provided between the floating sheave and the sheave shaft. This sheave structure requires regular maintenance, inspection and replacement. If the maintenance is improper and the lubricating oil is not added in time, the bearing will be poorly lubricated, and dry friction will be formed between the bearing and the sheave shaft due to relative operation. Under long-term forward and reverse operation and impact, the friction between the floating sheave and the sheave shaft is large, the wear is fast, and the service life is short, so it must be replaced frequently. At the same time, the wire rope is also easy to wear quickly, which poses a safety hazard. Due to the large size of the floating sheave, it is troublesome to repair and replace, and there are many defects such as long maintenance time, high cost, and heavy workload.

[0004] Improvements are made on the traditional sheave structure, with rolling bearings replacing copper bushings. A pair of rolling bearings are installed between the hub and shaft of each floating sheave as support, and the bearings are axially positioned through sleeves. When the linear speeds of the steel ropes are not exactly the same, each floating sheave and the shaft can rotate freely and flexibly relative to each other through the bearings. An oil injection hole is left on each floating sheave hub so that grease can be regularly injected into the bearings. This operation mode requires that the outer ring of the bearing at the inner hole of each floating sheave rotates at the same speed as the hoist while the inner ring is stationary, which places high demands on the operating service life of the bearings. However, since the selection of the bearing size is restricted by the sheave shaft, the inner hole of the floating sheave hub and the spacing between the sheave steel ropes, it is not possible to make a more reasonable selection according to the actual load and service life requirements. The bearing in the sheave structure is the key to the operation of the sheave. Since the rolling bearing is not flexible and stuck, and the friction coefficient between the steel rope and the fixed sheave and the floating sheave is small, it is easy to slip and affect the smooth operation of the sheave, which will affect the service life of the sheave. The normal operation of the sheave device directly affects the increase in production and increases the cost of maintenance and replacement. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a multi-rope friction hoist sheave device which runs smoothly, has a long service life and is maintenance-free. A sealing groove and a sealing ring structure are added between the fixed wheel hub and the movable wheel hub. The combined structure of adding a thrust bearing on the basis of the rolling bearing is safer and more reasonable, so that the sheave device runs stably, its service life is extended, and the maintenance cost of the sheave device is reduced.

[0006] The technical scheme adopted by the utility model is: a multi-rope friction hoist sheave device, including a sheave shaft, both ends of the sheave shaft are supported on bearing seats, main bearings are installed in the bearing seats, a fixed wheel is fixedly arranged on one side of the sheave shaft through a flat key, at least one floating wheel is arranged side by side on the same side of the sheave shaft adjacent to the fixed wheel, a fixed wheel hub is arranged on the fixed wheel near the inside of the sheave shaft, a floating wheel hub is arranged on the floating wheel near the inside of the sheave shaft, two sets of rolling bearings and two sets of thrust bearings are arranged between each floating wheel hub and the sheave shaft, two sealing grooves are circumferentially arranged on the same side of the fixed wheel hub and the floating wheel hub, and sealing rings are installed in the sealing grooves.

[0007] Each floating wheel is provided with a lubrication device, including a lubricating oil cup. A communicating oil hole is provided at the gap between the floating wheel hub and the thrust bearing and the rolling bearing. The lubricating oil cup and the oil hole are connected through an oil pipe.

[0008] Two sets of rolling bearings are symmetrically arranged adjacent to each other in each floating wheel hub and between the center of the floating wheel, and thrust bearings are symmetrically arranged outside the two sets of rolling bearings.

[0009] Sealing rings are installed between the fixed hub and the adjacent floating hub, and between adjacent floating hubs to form side annular seals.

[0010] Two sets of rolling bearings and two sets of thrust bearings are arranged between each floating hub and the sheave shaft. The purpose of such arrangement is that the performance of the bearing has a great influence on the entire sheave. The two sets of rolling bearings arranged between each floating hub and the sheave shaft mainly bear radial loads, while the thrust bearing bears axial loads. The thrust bearing not only serves as a support to bear the axial thrust of the sheave during operation, but also maintains the axial relative position between the sheave shaft and the sheave to limit axial movement and plays an axial positioning role. The structure of adding thrust bearings on both sides of the rolling bearings is safer and more reasonable. The thrust bearings and rolling bearings are used together without interfering with each other, which makes the sheave device run stably, rotate flexibly without jamming and maintenance-free, prolongs its service life and reduces the maintenance cost of the sheave.

[0011] Two sealing grooves are circumferentially arranged on the same side of the fixed hub and the movable hub, and sealing rings are installed in the sealing grooves. The purpose of such arrangement is to use sealing rings made of materials such as fluororubber and fluoroether rubber, which have excellent high temperature resistance, excellent chemical stability, very good aging resistance, ozone resistance, and relatively outstanding physical and mechanical properties. They have good advantages in tear strength and elongation at break. The compression deformation rate of the sealing ring is very small, and its operating temperature range is from -15°C to 200°C. It is suitable for use in the harsh environmental conditions of the hoist, avoiding leakage of lubricating oil from the gap between the movable hub and the fixed hub, better lubrication and maintenance of the bearings, and avoiding improper bearing maintenance that affects the service life of the sheave device.

[0012] The beneficial effects of the utility model are as follows: the sheave device of the multi-rope friction hoist runs smoothly, has a long service life, and is maintenance-free; a sealing groove and a sealing ring structure are added between the fixed hub and the movable hub to prevent lubricating oil from leaking from the gap between the movable hub and the fixed hub; the thrust bearing and the rolling bearing are used in combination to bear the radial load and axial thrust of the sheave during operation, maintain the axial relative position between the sheave shaft and the sheave to limit axial movement, and play a role in axial positioning; the structure of adding thrust bearings on both sides of the rolling bearing is safer and more reasonable, so that the sheave device runs stably, rotates flexibly without jamming and is maintenance-free, thereby extending its service life and reducing the maintenance cost of the sheave device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the sky wheel device of the utility model;

[0014] Figure 2 It is a partial cross-sectional schematic diagram of the sky wheel device A of the utility model.

[0015] Markings in the figure: 1. crown wheel shaft; 2. fixed wheel; 3. movable wheel; 4. fixed wheel hub; 5. movable wheel hub; 6. rolling bearing; 7. thrust bearing; 8. sealing ring; 9. main bearing; 10. oil pipe; 11. oil hole. DETAILED DESCRIPTION

[0016] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0017] like Figure 1-2As shown, a multi-rope friction hoist sheave device includes a sheave shaft 1, both ends of the sheave shaft 1 are supported on bearing seats, main bearings 9 are installed in the bearing seats, a fixed wheel 2 is fixedly arranged on one side of the sheave shaft 1 through a flat key, at least one floating wheel 3 is arranged side by side on the same side of the sheave shaft 1 adjacent to the fixed wheel 2, both the fixed wheel 2 and the floating wheel 3 are split sheave structures, a fixed wheel hub 4 is arranged inside the fixed wheel 2 near the sheave shaft 1, and a floating wheel hub 5 is arranged inside the floating wheel 3 near the sheave shaft 1, each Two sets of rolling bearings 6 and two sets of thrust bearings 7 are arranged between the movable hub 5 and the sheave shaft 1. Two sealing grooves are circumferentially arranged on the same side of the fixed hub 4 and the movable hub 5. Sealing rings 8 are installed in the sealing grooves. The sealing rings 8 are made of fluororubber or fluoroether rubber and other materials. Side annular seals are formed between the fixed hub 4 and the adjacent movable hub 5, and between adjacent movable hubs 5 to prevent lubricating oil from leaking from the gap between the movable hub 5 and the fixed hub 4, so as to better lubricate and maintain the bearings.

[0018] Each floating wheel 3 is provided with a lubrication device, including a lubricating oil cup. A communicating oil hole 11 is provided at the gap between the floating wheel hub 5 and the thrust bearing 7 and the rolling bearing 6. The lubricating oil cup and the oil hole 11 are communicated with each other through an oil pipe 10.

[0019] In each floating wheel hub 5 and between the center wheel shaft 1, two sets of rolling bearings 6 are symmetrically arranged adjacent to each other along the two sides of the center of the floating wheel 3, and thrust bearings 7 are symmetrically arranged outside the two sets of rolling bearings.

[0020] The multi-rope friction hoist sheave device has a sealing groove and a sealing ring 8 structure added between the fixed hub 4 and the movable hub 5 to prevent lubricating oil from leaking from the gap between the movable hub 5 and the fixed hub 4; the thrust bearing 7 and the rolling bearing 6 are used in combination to withstand the radial load and axial thrust of the sheave during operation, maintain the axial relative position between the sheave shaft 1 and the sheave to limit axial movement, and play a role in axial positioning. The structure of adding thrust bearings 7 on both sides of the rolling bearing 6 is safer and more reasonable, so that the sheave device can run stably, rotate flexibly without jamming and requires maintenance, thereby extending the service life and reducing the maintenance cost of the sheave device.

[0021] The parts not described in detail in the present invention are prior art. In addition to the above embodiments, the present invention may also have other implementations, and any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A multi-rope friction hoist sheave device, characterized in that: It includes a sheave shaft, both ends of which are supported on bearing seats, a main bearing is installed in the bearing seat, a fixed wheel is fixedly provided on one side of the sheave shaft by a flat key, at least one floating wheel is arranged side by side on the same side of the sheave shaft adjacent to the fixed wheel, a fixed hub is arranged on the fixed wheel near the inside of the sheave shaft, a floating hub is arranged on the floating wheel near the inside of the sheave shaft, two sets of rolling bearings and two sets of thrust bearings are arranged between each floating hub and the sheave shaft, two sealing grooves are circumferentially provided on the same side of the fixed hub and the floating hub, and sealing rings are installed in the sealing grooves.

2. A multi-rope friction hoist sheave device according to claim 1, characterized in that: Each floating wheel is provided with a lubrication device, including a lubricating oil cup. A communicating oil hole is provided at the gap between the floating wheel hub and the thrust bearing and the rolling bearing. The lubricating oil cup and the oil hole are connected through an oil pipe.

3. A multi-rope friction hoist sheave device according to claim 1, characterized in that: Two sets of rolling bearings are symmetrically arranged adjacent to each other in each floating wheel hub and between the center of the floating wheel, and thrust bearings are symmetrically arranged outside the two sets of rolling bearings.

4. A multi-rope friction hoist sheave device according to claim 1, characterized in that: Sealing rings are installed between the fixed hub and the adjacent floating hub, and between adjacent floating hubs to form side annular seals.

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