Pressurizing guide wheel and manufacturing method thereof

Abstract

The invention relates to the technical field of elevator part design and manufacturing, in particular to a pressurizing guide wheel and a manufacturing method thereof. A plurality of rope grooves are formed in the outer side surface of the rim; the outer edges of the spokes are in welded connection with the inner side of the rim, and the centers of the spokes are provided with center holes for the bearing sleeves to pass through; the outer side surface of the bearing sleeve is welded with the center hole; the inflation interface is arranged on the spoke; the inner side of the rim, the at least two spokes and the outer side of the bearing sleeve form a sealed space, one side of the inflation connector is connected with the sealed space, and the other side of the inflation connector is connected with the outside. Pressurized gas is introduced into the sealed space through the inflation connector, so that pressure generated when the rim bears load is partially dispersed to the inner wall of the spoke, and better performance is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of elevator component design and manufacturing, and in particular to a pressurized guide wheel and a manufacturing method thereof. Background Art

[0002] At present, the manufacturing method of the wheels used in elevators is mainly completed by casting and subsequent mechanical processing. This traditional mechanical manufacturing method is difficult to machine when manufacturing pulleys with thick walls and heavy weights. As the specifications and weight of the elevator lifting pulleys increase, the energy consumption of the elevator will be very large each time it runs. There is also a way to solve the problem of large mass and high manufacturing cost of guide wheels by replacing materials.

[0003] For example, a method for manufacturing a composite elevator guide wheel disclosed in Chinese patent application publication number CN115537020A on December 30, 2022 includes the steps of mixing, melt mixing, molding, demolding, and forming. The present invention utilizes the good flexibility of the molecular chain of PA9T, and the regular molecular chain structure, the fast crystallization rate, and the high crystallinity. Therefore, PA9T has good processing performance. By adding glass fiber and metal powder, the friction and wear resistance can be enhanced, and the lubrication performance and conductivity of the elevator wheel made of the composite material can be enhanced, while reducing the manufacturing cost of the guide wheel.

[0004] However, during the demoulding and forming process, due to mold accuracy issues, the workpiece still needs to undergo a large number of "material reduction" processes so that the workpiece can reach the predetermined standard size. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to:

[0006] 1. Provide a pressurized guide wheel so that the guide wheel can be manufactured with less material to obtain the same structural strength and use strength.

[0007] 2. Provide a method for manufacturing a guide wheel, obtain the raw material usage of each component after calculation and practice, and use spinning and stamping to manufacture the rope groove on the rim and the reinforcing ribs on the spokes, so that the guide wheel can save more material costs in the overall processing process.

[0008] To achieve the above object, the present invention provides the following technical solution: a pressurized guide wheel, comprising:

[0009] The rim has a plurality of rope grooves on its outer surface;

[0010] At least two spokes are annular in shape, with outer edges welded to the inner side of the rim and a center hole for the bearing sleeve to pass through;

[0011] The outer surface of the bearing sleeve is welded to the center hole;

[0012] An air charging interface, arranged on the wheel spoke;

[0013] The inner side of the rim, at least two of the spokes and the outer side of the bearing sleeve form a sealed space, one side of the inflation interface is connected to the sealed space, and the other side of the inflation interface is connected to the outside.

[0014] Pressurized gas is introduced into the sealed space through the inflation interface, so that the pressure generated when the rim is under load is partially dispersed to the inner wall of the spoke to obtain better performance.

[0015] Optionally, there are two spokes.

[0016] Two spokes are used to form the side wall of the sealed space, and their size and shape should be consistent.

[0017] Optionally, the spoke is provided with a plurality of reinforcing ribs arranged in a circular array with the bearing sleeve as the center.

[0018] The reinforcing ribs are used to increase the structural strength of the spokes, further ensuring that the pressurized gas in the sealed space does not cause excessive deformation of the spokes.

[0019] Based on the structure of the above-mentioned pressurized guide wheel, the present invention provides a method for manufacturing the above-mentioned pressurized guide wheel, wherein the rim and the spokes are manufactured separately, and then the rim, the spokes and the bearing sleeve are welded together to form a hollow pressurized guide wheel, wherein:

[0020] The processing method of the rim is as follows:

[0021] 1. Load the coiled sheet into the sheet leveling machine, which will unfold and level the coiled sheet, and finally cut it into straight sheet materials according to the required size;

[0022] 2. Load the straight sheet material into the rolling machine for the rolling process, and roll the straight sheet material into a circle according to the required size and make the head and tail positions correspond;

[0023] 3. Load the materials into the rim butt welding and slag removal machine for butt welding and slag removal process;

[0024] Fourth, the material is fed into the spinning machine for spinning process to process the rope groove on the outer surface of the rim;

[0025] The processing method of the spoke is as follows:

[0026] 1. Load the coiled sheet into the sheet leveling machine, which will unfold and level the coiled sheet, and finally cut it into straight sheet materials according to the required size;

[0027] 2. Punch or laser cut the straight sheet material to obtain the circular spokes;

[0028] 3. Stamping reinforcement ribs on the spokes;

[0029] 4. Drill holes on the spokes and install the inflation interface;

[0030] Finally, the processed spokes are pressed into the rim and laser welded, and the bearing sleeves are pressed into the center hole and laser welded.

[0031] Optionally, in the rim processing method, the volume of the straight sheet material obtained by cutting is equal to the volume of the finished rim plus the processing allowance.

[0032] In the manufacturing method of the present invention, the required size of the finished rim is calculated, and the position of cutting the straight plate material is adjusted according to the error data obtained by repeatedly processing the finished rim. It can ensure that in the process of processing the finished rim, fewer "material reduction" processes and "material reduction" amounts are experienced compared to the general casting guide wheel method, thereby saving material costs.

[0033] The beneficial technical effect of the present invention is that pressurized gas is introduced into the sealed space through the inflation interface, so that the pressure generated when the rim is under load is partially dispersed to the inner wall of the spoke to obtain better performance. The required size of the finished rim is calculated, and the position of cutting the straight plate material is adjusted according to the error data obtained by repeatedly processing the finished rim. It can ensure that in the process of processing the finished rim, fewer "material reduction" processes and "material reduction" amounts are experienced compared to the general casting guide wheel method, thereby saving material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the finished product of the pressurized guide wheel in the present invention;

[0035] Figure 2 It is a schematic cross-sectional structure diagram of the finished product of the pressurized guide wheel in the present invention;

[0036] Figure 3 A unit mesh division diagram of finite element analysis in an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of model constraints in finite element analysis according to an embodiment of the present invention;

[0038] Figure 5 It is a Mises equivalent stress cloud diagram in the finite element analysis of an embodiment of the present invention;

[0039] Figure 6It is a cloud diagram of total deformation in finite element analysis of an embodiment of the present invention;

[0040] Figure 7 It is a schematic diagram of constraints after the model is loaded in the finite element analysis of an embodiment of the present invention;

[0041] Figure 8 It is a Mises equivalent stress cloud diagram after the model is loaded in the finite element analysis of the embodiment of the present invention;

[0042] Fig. 9 It is a cloud diagram of the total deformation of the model after loading in the finite element analysis of the embodiment of the present invention;

[0043] Fig.10 It is a constraint diagram of the model when it is not pressurized and loaded in the finite element analysis of the embodiment of the present invention;

[0044] Fig.11 It is a Mises equivalent stress cloud diagram when the model is not pressurized and loaded in the finite element analysis of the embodiment of the present invention;

[0045] Fig.12 It is a cloud diagram of the total deformation of the model when it is not pressurized and loaded in the finite element analysis of the embodiment of the present invention;

[0046] Fig.13 It is a schematic diagram of the processing process of the wheel rim of the present invention;

[0047] Fig.14 It is a schematic diagram of the rotary cold extrusion structure in the rim processing process of the present invention.

[0048] Figure numerals: 1- rim, 2- rope groove, 3- spoke, 4- bearing sleeve, 5- reinforcing rib, 6- inflation interface, 7- sealing space, 8- workpiece to be spun, 9- inclined block, 10- rotating spindle, 11- pressing plate, 12- extrusion hob. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0050] Reference Figure 1 , 2 As shown, a pressurized guide wheel comprises:

[0051] The rim 1 has five rope grooves 2 arranged parallel to each other on its outer surface, and the depth of the rope grooves 2 is greater than half the thickness of the rim 1;

[0052] The two spokes 3 are in a circular shape, with the outer edges welded to the inner side of the rim 1 and a center hole in the center for the bearing sleeve 4 to pass through; the spokes 3 are provided with six reinforcing ribs 5 arranged in a circular array with the bearing sleeve 4 as the center, and reinforcing protrusions arranged between the reinforcing ribs 5.

[0053] The outer surface of the bearing sleeve 4 is welded to the center hole;

[0054] An air charging interface 6 is provided on the spoke 3;

[0055] The inner side of the rim 1, the two spokes 3 and the outer side of the bearing sleeve 4 form a sealed space 7, one side of the inflation interface 6 is connected to the sealed space 7, and the other side of the inflation interface 6 is connected to the outside.

[0056] Pressurized gas is introduced into the sealed space 7 through the inflation interface 6, so that the pressure generated when the rim 1 is subjected to a load is partially dispersed to the inner wall of the spoke 3, so as to obtain better performance.

[0057] Based on the structure of the above-mentioned pressure guide wheel, the finite element analysis method was used to simulate it, such as Figure 3 As shown, the model is divided into tetrahedral grids, and the maximum grid size of the entire structure is 4 mm. After grid division, a total of 850711 nodes and 463722 unit grids are generated, and the simulated material is Q235 steel.

[0058] like Figure 4 As shown, the ultimate bearing pressure inside the sheave body is calculated according to the simulation requirements, and pressure is applied to each surface inside the sheave body until the yield strength of the Q235 material is reached. Constrain the surface of the sheave body bearing.

[0059] Under the above constraints, when a pressure of 0.13 MPa is applied to the wheel body, the Mises equivalent stress of the wheel body reaches 228.55 MPa, and the maximum stress position is as follows: Figure 5 As shown in the figure. The yield strength of Q235 material is 235Mpa. When a pressure of 0.14Mpa is applied to the wheel body, it exceeds the yield strength of Q235 material. Therefore, a pressure of 0.13Mpa is close to the ultimate load of the structure. The total deformation cloud at this time is as follows Figure 6 shown.

[0060] Under the above constraints, when 60% of the ultimate pressure, i.e. 0.078 MPa and 2000 kg of vertical downward rope force, is applied to the wheel body, the constraints and loads are as follows: Figure 7 shown.

[0061] The maximum Mises equivalent stress generated by the wheel body is 189.26Mpa, and the maximum stress position is as follows Figure 8 As shown, the yield strength of the material has not been reached. The maximum total deformation is 0.31703mm, and the position is as follows Fig. 9 shown.

[0062] like Fig.10 Under the constraints and loads shown, a 2000kg vertical downward rope force is applied to the wheel body, and the maximum Mises equivalent stress generated in the wheel body is 164.48Mpa. The maximum stress position is as follows: Fig.11 As shown, the yield strength of the material has not been reached. The maximum total deformation is 0.18168 mm, and the position is as follows Fig.12 shown.

[0063] Through Figure 8 and Fig.11 By comparison, it can be seen that when the wheel body is pressurized and loaded with 2000kg, the stress generated is more evenly directed to the reinforcement ribs below. And the pressure on the rope groove is also smaller than when there is no pressure.

[0064] Through Fig. 9 and Fig.12 By comparison, it can be seen that when there is no pressure and a load of 2000kg, the simulation shows that the deformation mainly occurs at the rope groove, and partly occurs on the spoke surface near the rope groove and the reinforcing ribs under the spoke; while when there is pressure and a load of 2000kg, the simulation shows that the deformation mainly occurs under the spoke. This shows that the inflation scheme of the present invention effectively enhances the effective strength of the rim and can reduce the deformation of the rim under load.

[0065] In order to manufacture the aforementioned guide wheel, this embodiment also provides a manufacturing method for the aforementioned pressurized guide wheel.

[0066] The rim 1 and the spoke 3 are manufactured separately, and then the rim 1, the spoke 3 and the bearing sleeve 4 are welded together to form a hollow pressurized guide wheel, wherein:

[0067] Reference Fig.13 As shown, the processing method of the rim 1 is as follows:

[0068] 1. Load the coiled sheet into the sheet leveling machine, which will unroll and level the coiled sheet, and finally cut it into a straight sheet material according to the required size, i.e. the workpiece shown in Figure A, which has a length of 1587mm, a width of 108mm, and a thickness of 7mm;

[0069] Second, the straight sheet material is fed into the rolling machine for the rolling process. The straight sheet material is rolled according to the required size and the head and tail positions are aligned to form a workpiece with an inner diameter of 542mm, an outer diameter of 556mm, and a width of 108mm, and a 1mm weld is reserved at the corresponding positions of the head and tail;

[0070] 3. Loading the material into the rim 1 butt welding and slag removal machine to perform butt welding and slag removal processes to obtain the workpiece shown in Figure B, and the butt welding method is resistance welding;

[0071] Fourth, the material is fed into the spinning machine for spinning process, and the rope groove 2 on the outer surface of the rim 1 is processed to obtain the workpiece shown in Figure C. After spinning, the inner diameter is 542 mm, the outer diameter is 558.6 mm, and the distance between the bottom of the rope groove and the center of the workpiece is 275.3 mm;

[0072] Specific rotary cold extrusion structure such as Fig.14 As shown, the workpiece 8 to be spun is sleeved on the inclined block 9, and the inner wall of the workpiece 8 to be spun is fitted with the outer side of the inclined block 9. The inclined block 9 is installed on the rotating spindle 10, and its inclined surface corresponds to the rotating spindle 10. The inclined block 9 is pressed against the rotating spindle 10 by the pressing plate 11 to complete the clamping of the workpiece 8 to be spun. At the beginning of the spinning process, the rotating spindle 10 drives the workpiece 8 to be spun to start rotating, and the extrusion hob 12 on the side approaches the outer surface of the workpiece 8 to be spun and starts to process the rope groove 3 on its outer surface.

[0073] The processing method of the spoke 3 is as follows:

[0074] 1. Load the coiled sheet into the sheet leveling machine, which will unfold and level the coiled sheet, and finally cut it into straight sheet materials according to the required size;

[0075] 2. Punching or laser cutting the straight sheet material to obtain the circular spoke 3;

[0076] 3. stamping a reinforcing rib 5 on the spoke 3;

[0077] Fourth, drill holes on the spokes 3 and install the inflation interface 6;

[0078] Finally, the processed spoke 3 is pressed into the rim 1 and laser welded, and the bearing sleeve 4 is pressed into the center hole and laser welded. The outer diameter of the finished product is 557.6 mm, the distance between the finished rope groove and the center of the workpiece is 274.8 mm, and the width is 110 mm.

[0079] In the method for processing the rim 1, the volume of the straight plate material obtained by cutting is equal to the volume of the finished rim 1 plus the processing allowance.

[0080] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A pressurized guide wheel, characterized in that: include: The rim has a plurality of rope grooves on its outer surface; At least two spokes are annular in shape, with outer edges welded to the inner side of the rim and a center hole for the bearing sleeve to pass through; The outer surface of the bearing sleeve is welded to the center hole; An air charging interface, arranged on the wheel spoke; The inner side of the rim, at least two of the spokes and the outer side of the bearing sleeve form a sealed space, one side of the inflation interface is connected to the sealed space, and the other side of the inflation interface is connected to the outside.

2. A pressurized guide wheel according to claim 1, characterized in that: There are two spokes.

3. A pressurized guide wheel according to claim 2, characterized in that: The wheel spokes are provided with a plurality of reinforcing ribs arranged in a circular array with the bearing sleeve as the center.

4. A method for manufacturing a pressurized guide wheel, characterized in that: The rim and the spokes are manufactured separately, and then the rim, the spokes and the bearing sleeve are welded together to form a hollow pressurized guide wheel, wherein: The processing method of the rim is as follows:

1. Load the coiled sheet into the sheet leveling machine, which will unfold and level the coiled sheet, and finally cut it into straight sheet materials according to the required size; 2. Load the straight sheet material into the rolling machine for the rolling process, and roll the straight sheet material into a circle according to the required size and make the head and tail positions correspond; 3. Load the materials into the rim butt welding and slag removal machine for butt welding and slag removal process; Fourth, the material is fed into the spinning machine for spinning process to process the rope groove on the outer surface of the rim; The processing method of the spoke is as follows:

1. Load the coiled sheet into the sheet leveling machine, which will unfold and level the coiled sheet, and finally cut it into straight sheet materials according to the required size; 2. Punch or laser cut the straight sheet material to obtain the circular spokes; 3. Stamping reinforcement ribs on the spokes; 4. Drill holes on the spokes and install the inflation interface; Finally, the processed spokes are pressed into the rim and welded, and the bearing sleeve is pressed into the center hole and welded.

5. The method for manufacturing a pressurized guide wheel according to claim 4, characterized in that: In the rim processing method, the volume of the straight plate material obtained by cutting is equal to the volume of the finished rim plus the processing allowance.

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