CN213537824U - Thrust bearing for crushed coal pressurized coal lock - Google Patents

Abstract

The utility model discloses a footstep bearing for broken coal pressurized coal lock, including the filler axle, bearing and bearing housing have set gradually from inside to outside in the circumference of filler axle, the bearing adopts the spot welding mode to be connected with the outer terminal surface of bearing housing, and the position has set gradually backing ring and support ring downwards below the bearing in the circumference of filler axle, all be equipped with the bolt hole on backing ring and the support ring, through setting up the bolted connection in the bolt hole between support ring and the backing ring, support ring and filler axle adopt the spot welding mode to connect, filler axle, backing ring and support ring three's axial lead coincidence has seted up the oil filler point on the casing support of position department between bearing and backing ring, the oil cup is installed to oil filler point department, can regularly mend oil through the oil cup, ensures that the lubrication targets in place, and the friction reduction to avoid string axle. The utility model provides a coal lock lower valve filler axle cluster axle, interior pendulum rod fracture problem.

Description

Thrust bearing for crushed coal pressurized coal lock

Technical Field

The utility model relates to a footstep bearing especially relates to a footstep bearing that is used for broken coal pressure coal to lock.

Background

Because the brown coal resources in China are rich, the brown coal is convenient to exploit, and the cost is relatively low, the brown coal is widely applied to a crushed coal pressure gasification furnace device, the upper part of the crushed coal pressure gasification furnace is provided with a coal lock for feeding coal into the furnace, and the lower part of the crushed coal pressure gasification furnace is provided with an ash lock for discharging ash, and the crushed coal pressure gasification furnace device are fatigue pressure containers for repeatedly pressurizing and decompressing. The coal and ash of the gasification furnace are controlled to lock each angle valve and cone valve by adopting a hydraulic driving mode to finish the coal feeding and ash discharging operation of the gasification furnace, thereby realizing the continuous operation of the gasification furnace. However, when the coal lock lower valve is used for about 7000h in the operation process, the U-shaped groove of the inner swing rod is torn in turn, so that the furnace is shut down and maintained, and the long-period stable operation of the gasification furnace is seriously influenced.

Disclosure of Invention

In view of this, the utility model aims at providing a footstep bearing for broken coal pressure coal lock to solve the coal lock lower valve packing axle cluster axle, interior pendulum rod fracture problem.

In order to achieve the purpose of the utility model, the technical proposal is as follows:

the utility model provides a footstep bearing for broken coal pressurized coal lock, includes the filler axle, has set gradually bearing and bearing housing from inside to outside in the circumference of filler axle, the bearing adopts the spot welding mode to be connected with the outer terminal surface of bearing housing, and the position has set gradually backing ring and support ring downwards below the bearing in the circumference of filler axle, all be equipped with the bolt hole on backing ring and the support ring, through setting up the bolted connection in the bolt hole between support ring and the backing ring, support ring and filler axle adopt the spot welding mode to connect, filler axle, backing ring and support ring three's axial lead coincidence has seted up the oil filler point on the casing support of position department between bearing and backing ring, the oil cup is installed to oil filler point department, can regularly mend oil through the oil cup, ensures that the lubrication targets in place, and the friction reduction to avoid string axle.

Preferably, the thickness of the bearing is 20 mm.

Preferably, the thickness of the backing ring is 20 mm.

The utility model has the advantages that: the utility model provides a coal lock lower valve filler axle cluster axle, interior pendulum rod fracture problem, improved the life of equipment, not only reduced the overhaul of the equipments work load, reduced and overhauld safe risk, still reduced simultaneously and caused the manufacturing cost of spare part consumption and start-stop loss because of the equipment damage, guaranteed the garrulous coal pressure gasification equipment safety and stability operation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the support ring.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

At present, the 4.0MPa crushed coal pressure gasification device of the company frequently has multiple times of coal locking valve inner swing rod fracture, so that the gasification furnace is frequently stopped, and the problem becomes another bottleneck limiting the long-period stable operation of the gasification furnace. Through multi-aspect analysis, the bearing and the backing ring of the outer swing rod are worn and thinned, the filler axially and externally penetrates through the shaft, and the inner swing rod is broken due to overlarge stress. The utility model discloses carry out technical transformation to original outer swing rod bearing and backing ring, can effectively solve the coal and lock lower valve packing axle cluster axle, interior swing rod fracture problem after the transformation to guarantee the operation of garrulous coal pressurization gasification equipment safety and stability.

The original material of the external swing rod bearing of the coal lock lower valve is QT500-7, the thickness of the bearing is 14mm, and the bearing is fixed on a coal lock shell bracket through a bearing sleeve and is equivalent to a static ring; the backing ring is made of 35# steel and has the thickness of 16mm, and the backing ring is fixed between the shaft shafts of the packing shaft through a connecting pin with the diameter of phi 8mm and is equivalent to a movable ring. The outer swing rod, the filling shaft, the backing ring and the inner swing rod are driven to move through the opening and closing of the hydraulic oil cylinder, and the coal lock lower valve is opened and closed. Because the backing ring is made of 35# steel and belongs to a non-wear-resistant part, the frequency of coal feeding is increased from 3.5 times/h to 4.9 times/h, so that the frequency of actions of the coal lock upper and lower valves is increased by about 40%; unsmooth opening and closing often appears in the valve under the lock of adding the coal, need shake the valve through improving oil pressure and switching speed, and lack the lubrication between outer swing rod bearing and the backing ring, be in the dry grinding state for a long time. The wear of the bearing and the backing ring is accelerated by the above 3 factors, and the service life is reduced. The backing ring is fixed with the filler shaft through a connecting pin with the diameter of 8mm, after long-time action, fatigue fracture easily occurs to the connecting pin, abrasion between a backing ring inner hole and the filler shaft loses the thrust effect, the bearing and the backing ring are seriously abraded, the filler shaft is led to be axially and outwards strung out, the stress at the U-shaped groove of the inner swing rod is changed, and the problem of fracture of the inner swing rod is caused.

The embodiment discloses a thrust bearing 2 for a crushed coal pressurized coal lock, which comprises a packing shaft 1, wherein a bearing 2 and a bearing 2 sleeve are sequentially arranged in the circumferential direction of the packing shaft 1 from inside to outside, the outer end faces of the bearing 2 and the bearing 2 sleeve are connected in a spot welding mode, a backing ring 4 and a support ring 5 are sequentially arranged at the position below the bearing 2 in the circumferential direction of the packing shaft 1, bolt holes 6 are respectively arranged on the backing ring 4 and the support ring 5, the support ring 5 is connected with the backing ring 4 through bolts arranged in the bolt holes 6, the support ring 5 is connected with the packing shaft 1 in a spot welding mode, the axial leads of the packing shaft 1, the backing ring 4 and the support ring 5 are superposed, an oil filling hole 7 is arranged on a shell support 9 at the position between the bearing 2 and the backing ring 4, an oil cup 8 is arranged at the oil filling hole 7, oil can be periodically filled through the oil cup 8, and the lubrication is ensured to be in place, and the friction is reduced, so that the shaft crosstalk is avoided.

In the present embodiment, the thickness of the bearing 2 is 20mm, and the thickness of the backing ring 4 is 20 mm. The friction surfaces of the bearing 2 and the backing ring 4 are respectively welded with hard alloy in a surfacing mode, so that the wear resistance is improved. The hard alloy of the surfacing layer on the friction surface of the bearing 2 is automatically surfaced by adopting plasma, the welding rod mark A102 of the transition layer is 2mm in thickness, the welding rod mark cobalt-based 2# of the surface layer is not less than 2 layers in surfacing, the processed thickness is 3mm, and the hardness after surfacing is HRC 47-52; the hard alloy of the surfacing layer on the friction surface of the backing ring 4 is automatically surfaced by adopting plasma, the welding rod brand of the transition layer is A102, the thickness is 2mm, the welding rod brand of the surface layer is cobalt-based 1#, the surfacing layer is not less than 2 layers, the processed thickness is 3mm, the hardness after surfacing is HRC42-47, and 4M 12 bolt holes 6 are uniformly distributed on the body of the backing ring 4; PT-I level detection should be carried out on the surface of the hard alloy after the bearing 2 and the backing ring 4 are processed, and cracks, pinholes, linear defects and any other defects are not allowed.

A connecting pin is arranged between the backing ring 4 and the packing shaft 1, a supporting ring 5 is additionally arranged behind the backing ring 4, 4M 12 bolt holes 6 are uniformly distributed on the body of the supporting ring 5, the supporting ring 5 is connected with the backing ring 4 by 4M 12 hexagon bolts, the strength grade of the bolts is not lower than 12.9 grade, and the periphery of the supporting ring 5 and the packing shaft 1 is subjected to spot welding (note that in order to ensure the coaxiality of the packing shaft 1, the backing ring 4 and the supporting ring 5, the spot welding work of the supporting ring 5 and the packing shaft 1 must be carried out after the three are arranged in place), so that the thrust ring and the packing shaft 1 can be prevented from moving relatively after the connecting pin is damaged; the bearing 2 and the outer end face of the shaft sleeve are subjected to spot welding, so that looseness and abrasion of the bearing 2 caused by abrasion of the backing ring 4 are avoided.

When the bearing 2 and the backing ring 4 are installed, lubricating grease is added to the friction surface, a phi 10mm oil filling hole 7 is drilled in the shell support 9 at the position between the bearing 2 and the backing ring 4, an oil cup 8 is additionally installed at the oil filling hole 7, oil is periodically replenished every week, lubrication is ensured to be in place, friction is reduced, and shaft bunching is avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, component separation or combination made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A thrust bearing for a crushed coal pressurized coal lock comprising a filler shaft, characterized in that: the bearing and the bearing sleeve are sequentially arranged in the circumferential direction of the packing shaft from inside to outside, the bearing is connected with the outer end face of the bearing sleeve in a spot welding mode, the position below the bearing in the circumferential direction of the packing shaft is sequentially provided with a backing ring and a supporting ring downwards, bolt holes are formed in the backing ring and the supporting ring, the supporting ring is connected with the backing ring through bolts arranged in the bolt holes, the supporting ring is connected with the packing shaft in a spot welding mode, axial leads of the packing shaft, the backing ring and the supporting ring coincide, an oil filling hole is formed in a shell support at the position between the bearing and the backing ring, an oil cup is installed at the oil filling hole, oil can be periodically filled through the oil cup, lubrication is ensured to be in place, friction is reduced, and shaft string is avoided.

2. The thrust bearing for a crushed coal pressurized coal lock of claim 1, wherein: the thickness of the bearing is 20 mm.

3. The thrust bearing for a crushed coal pressurized coal lock of claim 1, wherein: the thickness of backing ring is 20 mm.

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