Combined type heavy crane wheel with self-lubricating rim

Abstract

The invention belongs to the field of crane wheels, and particularly relates to a rim self-lubricating combined type heavy crane wheel which comprises a wheel working sleeve, a wheel inner ring, a lubricating assembly, a first tensioning assembly and a second tensioning assembly. The inner ring of the wheel inner ring is in interference fit connection with a wheel shaft of the crane through a first tensioning assembly; the outer ring of the wheel inner ring and the inner ring of the wheel working sleeve are in interference fit connection through a second tensioning assembly; a lubricating assembly is installed on the outer ring of the wheel working sleeve and used for achieving lubrication. Compared with the prior art, the service performance of the wheel tread working layer can be improved, the wheel working layer can be independently, rapidly and efficiently replaced, assembled and disassembled on the premise that an axle is not disassembled, and the impact load before the wheel flange makes contact with the side face of a track and the friction generated when the wheel flange makes contact with the side face of the track are reduced.

Description

Technical Field

[0001] The invention belongs to the field of crane wheels, in particular to a wheel rim self-lubricating combined heavy crane wheel. Background Art

[0002] With the rapid development of the global economy, the demand for steel has increased rapidly, and the steel production capacity has continued to expand. Steel companies need casting cranes with larger lifting capacity. my country has independently designed and manufactured hundreds of casting cranes with a lifting capacity of more than 400t. For example, the eight 550t four-beam four-track casting cranes with the largest lifting capacity in Asia provided by Taiyuan Heavy Industry for India's JSW Steel Group are composed of 12 sets of wheel groups, with a total of 24 wheels, including 8 driving wheels. For example, the 480 / 80t, 4-beam, 6-track double-trolley casting crane commonly used in large steel mills, the wheel group is divided into a 2-wheel wheel group and a 3-wheel wheel group. Each overhead crane has a total of 16 wheel groups, that is, 36 wheels. A foundry has a total of 10 480-ton cranes, with 360 wheels in service online, and the weight of the wheel group exceeds 2t.

[0003] The cost of replacing new wheels due to wheel wear accounts for a relatively high proportion of the crane's use and maintenance costs. During the replacement process, disassembly and reassembly require a long time, a lot of manpower, a small working space and high-altitude operations. Each replacement of a set of wheels requires 8-10 fitters and 8-10 hours of maintenance. Especially when the crane's traveling mechanism wheel set fails, long-term passive shutdown for maintenance will cause huge economic losses to the steel plant. Moreover, when replacing a wheel, the entire wheel set must be dismantled and hoisted to the designated location, and then the axle and bearing are removed before the new wheel is reinstalled with the axle, bearing, etc. to form a wheel set.

[0004] At present, the integral forged wheels generally use materials such as 42CrMo and 65Mn, and the forging and heat treatment processes are relatively mature, so there is little room for further improvement in the performance of the working layer. In addition, heavy-duty cast cranes have a large load capacity, and there will be a certain amount of lateral displacement (wheel axial direction) during the operation of the crane, which will cause a large lateral impact on the wheel rim, resulting in severe dry sliding friction and wear between the wheel rim and the side of the rail, causing excessive wear of the wheel rim, which can easily lead to premature scrapping of the wheel. Therefore, the quality and performance of large-scale cast crane wheels are very critical. If the strength, hardness, and hardened layer depth of the crane wheel tread working layer can be improved, and its wear resistance can be improved, the service life of the wheel can be extended, the replacement frequency can be reduced, and costs can be reduced and efficiency can be increased for steel companies. Summary of the invention

[0005] The purpose of the present invention is to provide a wheel rim self-lubricating combined heavy crane wheel, which can improve and enhance the performance of the wheel tread working layer, realize the independent rapid and efficient replacement and assembly and disassembly of the wheel working layer without disassembling the axle, and reduce the impact load before the wheel rim contacts the side of the track and the friction when the wheel rim contacts the side of the track.

[0006] The technical solution to realize the present invention is: a rim self-lubricating combined heavy-duty crane wheel, including a wheel working sleeve, a wheel inner ring, a lubrication assembly, a first tensioning assembly and a second tensioning assembly; the inner circle of the wheel inner ring and the wheel axle of the crane are connected by an interference fit through the first tensioning assembly; the outer circle of the wheel inner ring and the inner circle of the wheel working sleeve are connected by an interference fit through the second tensioning assembly; a lubrication assembly is installed on the outer ring of the wheel working sleeve for lubrication.

[0007] Furthermore, a first recessed groove is provided near the inner circle of the inner ring of the wheel, and a concave first oil groove is machined from the bottom of the first recessed groove along the thickness direction with the inner ring of the wheel as the central axis, and hydraulic oil is injected into the concave first oil groove; a second recessed groove is provided near the outer circle of the inner ring of the wheel, and a concave second oil groove is machined from the bottom of the second recessed groove along the thickness direction with the inner ring of the wheel as the central axis, and hydraulic oil is injected into the concave second oil groove.

[0008] Furthermore, the first tensioning assembly includes: a first clamping pad, a hexagon socket head screw, a spring washer, a first clamping ring and a first sealing ring; after the hydraulic oil is injected into the first oil groove on the inner ring of the wheel, it is compressed and sealed by the first clamping ring and the first sealing ring; the first clamping pad is installed in the first recessed groove on the inner ring of the wheel, and a through hole is opened on the first clamping pad. The hexagon socket head screw passes through the spring washer, the through hole on the first clamping pad and cooperates with the first threaded hole on the inner ring of the wheel to compress the first clamping pad, and then further compress the first clamping ring to squeeze the hydraulic oil.

[0009] Furthermore, the second tensioning assembly includes: a second clamping pad, a hexagon socket head screw, a spring washer, a second sealing ring and a second clamping ring; after the hydraulic oil is injected into the second oil groove on the inner ring of the wheel, the second clamping ring and the second sealing ring are used for compression and sealing; a second clamping pad is installed in the second recessed groove on the inner ring of the wheel, and a group of through holes are opened on the second clamping pad. The hexagon socket head screw passes through the spring washer, the through hole on the second clamping pad and cooperates with the second threaded hole on the inner ring of the wheel to compress the second clamping pad, further compress the second clamping ring, and squeeze the hydraulic oil.

[0010] Furthermore, the first tensioning assembly or the second tensioning assembly also includes a cylindrical helical compression spring, one end of which is fixed to the end face of the sink groove and the other end is compressed by a compression pad, so that force balance is ensured when the compression pad is compressed by the hexagon socket head screw.

[0011] Furthermore, the lubrication assembly includes: a straight-through pressure-injection oil cup and a friction-reducing ring; an annular groove is machined on the inner side of the rim portion of the wheel working sleeve for installing the friction-reducing ring, wherein the friction-reducing ring is symmetrically arranged on the rims on both sides; the friction-reducing ring is used for rim impact buffering and automatic lubrication; through holes are evenly machined along the circumferential direction on the outer side of the rim portion of the wheel working sleeve for installing the straight-through pressure-injection oil cup, providing lubricating oil to the friction-reducing ring while preventing the lubricating oil from flowing out of the hole.

[0012] Furthermore, a lubricating oil injection port is processed on the friction-reducing ring, and the injection port connects the hollow oil storage cavity inside the friction-reducing ring and the outside. When the friction-reducing ring contacts the external crane rail, it will produce elastic deformation and squeeze the lubricating oil out of the injection port to the wheel rim and the side of the rail.

[0013] Furthermore, the corner of the anti-friction ring with the injection port is designed to be close to the wheel working sleeve, so that the flowing lubricating oil can be sucked into the hollow oil storage cavity through the injection port, thereby achieving the effect of recycling.

[0014] Furthermore, the first tensioning assembly and the second tensioning assembly are respectively arranged on two end surfaces of the inner ring of the wheel.

[0015] Compared with the prior art, the present invention has the following significant advantages:

[0016] 1. The present invention utilizes waste crane wheels, which can not only greatly increase the service life of the wheels, but also can quickly replace the wheel working sleeve after the service life has reached the end, and other parts of the wheel do not need to be replaced, which greatly reduces material consumption;

[0017] 2. The present invention uses the first tensioning assembly and the second tensioning assembly to achieve efficient interference fit between the wheel and the axle, and between the wheel and the annular working sleeve, and can achieve online rapid, efficient, and non-destructive disassembly, which can greatly reduce wheel maintenance time and downtime;

[0018] 3. The lubrication component of the present invention plays the role of anti-impact buffer and lubrication and friction reduction of the wheel flange. It can reduce the impact load and provide oil before the wheel flange contacts the side of the track. It can effectively reduce the sliding friction coefficient between the wheel flange and the side of the crane track, and has a significant effect on alleviating the severe dry sliding friction and wear on the side of the wheel flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 A two-dimensional view of the direction in which the second tensioning assembly of the present invention is located;

[0021] Figure 3 is a two-dimensional cross-sectional view of the present invention;

[0022] Figure 4A two-dimensional view of the direction in which the first tensioning assembly of the present invention is located;

[0023] Figure 5 It is a partial enlarged view of the lubrication component;

[0024] Figure 6 is a partial enlarged view of the first tensioning component;

[0025] Figure 7 It is a schematic diagram of the wheel working set;

[0026] Figure 8 This is a schematic diagram of the inner ring of the wheel;

[0027] Fig. 9 This is a schematic diagram of the straight-through pressure injection oil cup GB1152-89;

[0028] Fig.10 This is a schematic diagram of the wheel rim impact buffer and the automatic lubricating anti-friction ring (polyurethane);

[0029] Fig.11 Schematic diagram of the first clamping ring (small diameter);

[0030] Fig.12 is a schematic diagram of the first compression pad (small diameter);

[0031] Fig.13 This is a schematic diagram of the second clamping ring (large diameter);

[0032] Fig.14 is a schematic diagram of the second compression pad (large diameter);

[0033] Fig.15 This is a schematic diagram of the hexagon socket head screw GB / T70.1-2008.

[0034] Reference numerals:

[0035] 1-wheel working sleeve; 2-straight-through pressure injection oil cup; 3-wheel rim impact buffer and automatic lubrication anti-friction ring (polyurethane); 4-wheel inner ring; 5-cylindrical helical compression spring; 6-pressure pad; 7-hexagon socket head screw; 8-spring washer; 9-pressure ring; 10-first sealing ring; 11-crane track profile. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-15 The present invention is further described with reference to the accompanying drawings and specific embodiments.

[0037] The present invention is a wheel rim self-lubricating combined heavy crane wheel. It can improve and enhance the performance of the wheel tread working layer, and can realize the independent rapid and efficient replacement and assembly and disassembly of the wheel working layer without disassembling the axle. The main structure includes a wheel working sleeve 1, a wheel inner ring 4, a lubrication component, a first tensioning component and a second tensioning component; the inner circle of the wheel inner ring 4 and the wheel axle of the crane are connected by interference fit through the first tensioning component; the outer circle of the wheel inner ring 4 and the inner circle of the wheel working sleeve 1 are connected by interference fit through the second tensioning component. A lubrication component is installed on the outer ring of the wheel working sleeve 1 for lubrication.

[0038] like Figure 6 As shown, the first tensioning assembly includes: a cylindrical helical compression spring 5, a first clamping pad 6, a hexagon socket head screw 7, a spring washer 8, a first clamping ring 9 and a first sealing ring 10.

[0039] After the wheel inner ring 4 is sleeved on the wheel axle, a circle of first recessed grooves is opened on the wheel inner ring 4 near the inner circle (with the central axis of the wheel inner ring 4 as the rotation center), and a concave first oil groove is processed along the thickness direction from the bottom surface of the first recessed groove, close to the inner circle of the wheel inner ring 4 (with the central axis of the wheel inner ring 4 as the rotation center), and hydraulic oil is injected into the concave first oil groove.

[0040] Six groups of first threaded holes are evenly arranged in the first sink groove for installing the first tensioning assembly.

[0041] After hydraulic oil is injected into the concave first oil groove on the wheel inner ring 4, it is compressed and sealed by the first clamping ring 9 and the first sealing ring 10.

[0042] The first pressing pad 6 is installed in the first recessed groove on the wheel inner ring 4 (the end face of the first pressing ring 9), and the first pressing pad 6 is provided with 6 groups of through holes. The hexagon socket head screw 7 passes through the spring washer 8, and the through holes on the first pressing pad 6 cooperate with the first threaded hole on the wheel inner ring 4 to press the first pressing pad 6, and then further press the first pressing ring 9 to squeeze the hydraulic oil. One end of the cylindrical helical compression spring 5 is fixed on the end face of the first recessed groove, and the other end is pressed by the first pressing pad 6 to ensure force balance when the hexagon socket head screw 7 presses the first pressing pad 6, thereby ensuring a tight connection.

[0043] After the wheel inner ring 4 is connected to the wheel axle, the hexagon socket head screw 7 is tightened to squeeze the hydraulic oil through the first clamping pad 6 and the first clamping ring 9, so that the inner circle of the wheel inner ring 4 expands inward and squeezes the wheel axle, thereby achieving an interference fit effect between the wheel inner ring 4 and the wheel axle.

[0044] The first sealing ring 10 is an O-shaped rubber for hydraulic and pneumatic use, which is used to ensure that the hydraulic oil does not flow out of the groove and prevent dust from entering;

[0045] The wheel working sleeve 1 is made of high alloy material;

[0046] The first clamping pad 6 , the first clamping ring 9 and the first sealing ring 10 all rotate around the central axis of the wheel inner ring 4 .

[0047] The second tensioning assembly comprises: a cylindrical helical compression spring 5, a second clamping pad, a hexagon socket head screw 7, a spring washer 8, a second sealing ring and a second clamping ring.

[0048] A circle of second recessed groove (on the opposite end face to the first recessed groove) is provided on the wheel inner ring 4 near the outer circle (close to the wheel working sleeve 1) (taking the central axis of the wheel inner ring 4 as the rotation center). From the bottom surface of the second recessed groove, a circle near the outer circle of the wheel inner ring 4 is processed along the thickness direction (taking the central axis of the wheel inner ring 4 as the rotation center), and hydraulic oil is injected into the concave second oil groove.

[0049] Nine groups of second threaded holes are evenly arranged in the second sink groove for installing the second tensioning assembly.

[0050] After the hydraulic oil is injected into the second oil groove on the inner ring 4 of the wheel, it is compressed and sealed by the second clamping ring and the second sealing ring.

[0051] A second clamping pad is installed in the second recessed groove on the wheel inner ring 4. The second clamping pad is provided with 9 groups of through holes. The hexagon socket head screw 7 passes through the spring washer 8. The through holes on the second clamping pad cooperate with the second threaded hole on the wheel inner ring 4 to clamp the second clamping pad, and further clamp the second clamping ring to squeeze the hydraulic oil. One end of the cylindrical helical compression spring 5 is fixed on the end face of the second recessed groove, and the other end is clamped by the second clamping pad, so that the force balance is ensured when the hexagon socket head screw 7 is used to clamp the second clamping pad, thereby ensuring a tight connection.

[0052] After the wheel inner ring 4 is connected to the wheel working sleeve 1, the hexagon socket head screw 7 is tightened, and the hydraulic oil is squeezed through the second clamping pad and the second clamping ring, so that the outer circle of the wheel inner ring 4 expands outward, squeezing the wheel working sleeve 1, so as to achieve the effect of interference fit between the wheel inner ring 4 and the wheel working sleeve 1.

[0053] The first sealing ring 10 and the second rubber sealing ring have the same structure but different sizes. The size of the second rubber sealing ring is larger than that of the first sealing ring 10.

[0054] The first clamping ring 9 and the second clamping ring have the same structure but different sizes;

[0055] The first pressing pad 6 and the second pressing pad have the same structure, but different numbers and sizes of through holes formed thereon.

[0056] like Figure 5As shown, the lubrication assembly includes: a straight-through pressure injection oil cup 2, a friction reducing ring 3;

[0057] Annular grooves (with the central axis of the wheel working sleeve 1 as the rotation center) are machined on the inner sides of the two wheel rims of the wheel working sleeve 1 (symmetrically) to accommodate the anti-friction rings 3, wherein the anti-friction rings 3 are a pair (two), one on each wheel rim on both sides;

[0058] The anti-friction ring 3 is used for wheel rim impact buffering and automatic lubrication, and the anti-friction ring 3 is made of polyurethane material. The interior of the anti-friction ring 3 is a hollow structure for storing lubricating oil.

[0059] Furthermore, tiny through holes are evenly processed along the circumferential direction on the outer side of the rim part of the wheel working sleeve 1, with 6 holes on each side, for installing the straight-through pressure injection oil cup 2 to provide lubricating oil to the hollow structure of the friction reducing ring 3 while preventing the lubricating oil from flowing out of the tiny through holes.

[0060] like Figure 5 As shown, a lubricating oil injection port is arranged on the anti-friction ring 3 near the wheel working sleeve 1, and the injection port connects the hollow oil storage cavity inside the anti-friction ring 3 and the outside. When the anti-friction ring 3 contacts the external crane rail, it will be elastically deformed, and the lubricating oil will be squeezed out from the injection port to the wheel rim and the side of the crane rail, thereby reducing friction.

[0061] At the same time, the corner with the injection port on the friction reducing ring 3 is designed to be close to the wheel working sleeve 1, which is used to suck the lubricating oil left from the wheel rim into the hollow oil storage cavity through the injection port, so as to achieve the effect of recycling the lubricating oil and avoid waste.

[0062] The lubrication component has both the functions of wheel flange impact resistance and buffering and lubrication and friction reduction. It can reduce the impact load and provide oil before the wheel flange contacts the side of the track. It can effectively reduce the sliding friction coefficient between the wheel flange and the side of the crane track, and has a significant effect on alleviating the severe dry sliding friction and wear on the side of the wheel flange.

[0063] The present invention utilizes waste crane wheels for manufacturing, and the worn and failed parts of the waste wheels only account for a small part of the whole wheel. After the worn area (working layer) is cut off, waste Cr3 and Cr5 supporting roller materials are used, and a high-strength and high-wear-resistant annular U-shaped groove wheel working sleeve 1 is processed by a separate forging and heat treatment to replace the original wheel working layer. This can not only greatly improve the service life of the wheel, but also the wheel working sleeve 1 can be quickly replaced after the service life is reached, and other parts of the wheel do not need to be replaced, which greatly reduces material consumption.

[0064] The disclosed combined heavy crane wheel of the present invention can reduce costs and increase efficiency for enterprises through recycling of materials and green manufacturing. In addition, the combined wheel is easy to assemble and disassemble, fast and efficient, which can greatly reduce the wheel replacement time and downtime, and greatly reduce the maintenance and maintenance costs of the crane.

[0065] The above shows and describes the basic principle, main features and advantages of this invention. This invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principle of this invention. Without departing from the spirit and scope of this invention, this invention may have various changes and improvements, which fall within the scope of this invention to be protected. The scope of protection of this invention is defined by the attached claims and their equivalents.

Claims

1. A wheel rim self-lubricating combined heavy crane wheel, characterized in that: It includes a wheel working sleeve, a wheel inner ring, a lubrication component, a first tensioning component and a second tensioning component; the inner circle of the wheel inner ring is connected to the wheel axle of the crane through an interference fit through the first tensioning component; the outer circle of the wheel inner ring is connected to the inner circle of the wheel working sleeve through an interference fit through the second tensioning component; a lubrication component is installed on the outer ring of the wheel working sleeve for lubrication.

2. The wheel rim self-lubricating combined heavy crane wheel according to claim 1, characterized in that: A first recessed groove is provided near the inner circle of the inner ring of the wheel, and a concave first oil groove is machined from the bottom of the first recessed groove along the thickness direction with the inner ring of the wheel as the central axis, and hydraulic oil is injected into the concave first oil groove; a second recessed groove is provided near the outer circle of the inner ring of the wheel, and a concave second oil groove is machined from the bottom of the second recessed groove along the thickness direction with the inner ring of the wheel as the central axis, and hydraulic oil is injected into the concave second oil groove.

3. The wheel rim self-lubricating combined heavy crane wheel according to claim 2, characterized in that: The first tensioning assembly includes: a first clamping pad, a hexagon socket head screw, a spring washer, a first clamping ring and a first sealing ring; after the hydraulic oil is injected into the first oil groove on the inner ring of the wheel, it is compressed and sealed by the first clamping ring and the first sealing ring; the first clamping pad is installed in the first recessed groove on the inner ring of the wheel, and a through hole is opened on the first clamping pad. The hexagon socket head screw passes through the spring washer, the through hole on the first clamping pad and cooperates with the first threaded hole on the inner ring of the wheel to compress the first clamping pad, and then further compress the first clamping ring to squeeze the hydraulic oil.

4. The wheel rim self-lubricating combined heavy crane wheel according to claim 2, characterized in that: The second tensioning assembly includes: a second clamping pad, a hexagon socket head screw, a spring washer, a second sealing ring and a second clamping ring; after the hydraulic oil is injected into the second oil groove on the inner ring of the wheel, it is compressed and sealed by the second clamping ring and the second sealing ring; a second clamping pad is installed in the second recessed groove on the inner ring of the wheel, and a group of through holes are opened on the second clamping pad. The hexagon socket head screw passes through the spring washer, the through hole on the second clamping pad and the second threaded hole on the inner ring of the wheel to cooperate for compressing the second clamping pad, further compressing the second clamping ring, and squeezing the hydraulic oil.

5. The rim self-lubricating combined heavy crane wheel according to any one of claims 3 or 4, characterized in that: The first tensioning assembly or the second tensioning assembly also includes a cylindrical helical compression spring, one end of which is fixed to the end surface of the sink groove and the other end is compressed by a compression pad, so that force balance is ensured when the compression pad is compressed by the hexagon socket head screw.

6. The wheel rim self-lubricating combined heavy crane wheel according to claim 1, characterized in that: The lubrication assembly includes: a straight-through pressure-injection oil cup and a friction-reducing ring; an annular groove is machined on the inner side of the rim of the wheel working sleeve for installing the friction-reducing ring, wherein the friction-reducing ring is symmetrically arranged on the rims on both sides; the friction-reducing ring is used for rim impact buffering and automatic lubrication; through holes are evenly machined along the circumferential direction on the outer side of the rim of the wheel working sleeve for installing the straight-through pressure-injection oil cup, which provides lubricating oil to the friction-reducing ring and prevents the lubricating oil from flowing out of the hole.

7. The wheel rim self-lubricating combined heavy crane wheel according to claim 1, characterized in that: The anti-friction ring is processed with an injection port, which connects the hollow oil storage cavity inside the anti-friction ring and the outside. It is used to generate elastic deformation when the anti-friction ring contacts the external crane rail, and squeeze the lubricating oil out of the injection port to the wheel rim and the side of the rail.

8. The wheel rim self-lubricating combined heavy crane wheel according to claim 1, characterized in that: At the same time, the corner with the oil outlet gap on the friction reducing ring is designed to be close to the wheel working sleeve. When the squeezed excess lubricating oil flows down along the inner wall of the wheel working sleeve, the flowing lubricating oil can be sucked into the hollow oil storage cavity through the injection port, thereby recovering the excess lubricating oil.

9. The wheel rim self-lubricating combined heavy crane wheel according to claim 1, characterized in that: The first tensioning assembly and the second tensioning assembly are respectively arranged on two end surfaces of the inner ring of the wheel.

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