Shaft supporting mechanism and transformation method of shaft supporting mechanism

Abstract

The invention discloses a shaft supporting mechanism which is used for supporting a rotating shaft and comprises a base, a thrust structure, a first supporting structure, a second supporting structure and an oil supply structure. The base is cylindrical, the thrust structure is annular, fixedly connected to the periphery of the rotating shaft in a sleeving mode and provided with a thrust abutting face, the first supporting structure is annular, fixedly connected to the inner circumference of the base in a sleeving mode and rotationally connected to the periphery of the thrust structure in a sleeving mode, and the first supporting structure is provided with a thrust supporting face. The thrust supporting face is in sliding fit with the thrust abutting face and used for supporting the thrust abutting face. The second supporting structure is annular and arranged above the thrust structure, and the second supporting structure is fixedly connected to the inner periphery of the base in a sleeving mode and rotationally connected to the outer periphery of the rotating shaft in a sleeving mode. The oil supply structure is arranged on the base and used for providing lubricating oil. According to the shaft supporting mechanism, the rotating shaft can obtain good radial and axial sliding support, the supporting mechanism is not prone to damage, and safety and reliability are good. The invention further discloses a transformation method of the shaft supporting mechanism.

Description

Technical Field

[0001] The invention relates to a transmission structure, and in particular to a shaft supporting mechanism and a method for modifying the shaft supporting mechanism. Background Art

[0002] In the related art, a gearbox is arranged between the circulating water pump and the driving motor of a nuclear power plant, the output shaft of the gearbox is connected to the circulating water pump, and the input shaft of the gearbox is connected to the driving motor. The input shaft of the gearbox is an important torque transmission component, which needs to bear the weight brought by the component, and bear large radial force and axial force.

[0003] The existing input shaft and the external support housing are supported for rotation by upper and lower rolling bearings as a support mechanism, but the rolling bearings are easily damaged and lack safety and reliability. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a shaft support mechanism to solve the technical problem that the existing support mechanism for rotatably supporting the input shaft and the external support housing is easily damaged.

[0005] The invention also provides a method for modifying the shaft supporting mechanism.

[0006] According to the first aspect of the present invention, the shaft support mechanism is used to support a vertically arranged rotating shaft, and the shaft support mechanism includes: a base, which is cylindrical; a thrust structure, which is annular, fixedly sleeved on the outer periphery of the rotating shaft, and is provided with a thrust abutment surface; a first support structure, which is annular, fixedly sleeved on the inner periphery of the base, and rotatably sleeved on the outer periphery of the thrust structure, the first support structure has a thrust support surface, the thrust support surface and the thrust abutment surface are slidably matched with each other, and are used to support the thrust abutment surface to limit the downward movement of the thrust abutment surface; a second support structure, which is annular, is arranged above the thrust structure, the second support structure is fixedly sleeved on the inner periphery of the base, and rotatably sleeved on the outer periphery of the rotating shaft; an oil supply structure, which is arranged on the base and is used to provide lubricating oil between the abutment surfaces of the first support structure and the thrust structure, and between the abutment surfaces of the second support structure and the rotating shaft.

[0007] The shaft support mechanism according to the embodiment of the present invention has at least the following beneficial effects: a thrust structure is fixed to the rotating shaft, and the thrust structure cooperates with the first support structure fixed to the base, and the first support structure supports the thrust abutment surface of the thrust structure through the thrust support surface, and slidably cooperates with the thrust abutment surface, so that the first support structure can bear the axial force of the rotating shaft; at the same time, the first support structure is rotatably sleeved on the thrust structure, and a second support structure is arranged on the upper side of the first support structure, and the second support structure is fixed to the base and rotatably sleeved on the rotating shaft, and the first support structure and the second support structure can provide radial sliding support for the rotating shaft; in addition, an oil supply structure is provided to supply lubricating oil to the first support structure and the second support structure; through the above structure, the first support structure, the second support structure and the thrust structure can replace the existing shaft support mechanism of the upper and lower rolling bearings, the rotating shaft can obtain good radial and axial sliding support, the support mechanism is not easy to be damaged, and has good safety and reliability.

[0008] According to some embodiments of the present invention, the thrust structure is provided with an upward-facing oil receiving surface, the oil supply structure is configured to supply oil to the oil receiving surface, the oil receiving surface is provided with a plurality of oil guide holes penetrating the thrust structure, the plurality of oil guide holes are arranged at intervals around the rotating shaft, the oil guide holes are inclined relative to the axis of the rotating shaft, and the distance between the upper end and the rotating shaft is smaller than the distance between the lower end and the rotating shaft, the lower end opening of the oil guide hole faces the first supporting structure, and is used to transport lubricating oil to the thrust supporting surface and the inner periphery of the first supporting structure.

[0009] According to some embodiments of the present invention, the lower end opening of the oil guide hole faces the thrust support surface, the thrust support surface is provided with a first thrust surface oil groove extending radially along the rotating shaft, the inner periphery of the first support structure is provided with a first inner circumferential surface oil groove corresponding to the first thrust surface oil groove, the first inner circumferential surface oil groove extends axially along the rotating shaft, and one end of the first thrust surface oil groove close to the rotating shaft is connected to the upper end of the first inner circumferential surface oil groove.

[0010] According to some embodiments of the present invention, a plurality of groups of the first thrust surface oil grooves and the first inner circumferential surface oil grooves are arranged in a one-to-one correspondence and are arranged at intervals along the circumference of the rotating shaft; the thrust support surface is also provided with a plurality of second thrust surface oil grooves extending radially along the rotating shaft, and at least one second thrust surface oil groove is arranged between any two of the first thrust surface oil grooves.

[0011] According to some embodiments of the present invention, a gap channel extending in the up-down direction is formed between the outer periphery of the thrust structure and the first supporting structure, the upper and lower ends of the gap channel are open, the upper end opening of the gap channel is adjacent to the oil receiving surface, and the lower end opening of the gap channel is connected to the first thrust surface oil groove.

[0012] According to some embodiments of the present invention, the oil supply structure is used to supply lubricating oil to the second supporting structure, and the shaft supporting mechanism is further provided with a guide channel, and the guide channel is used to guide the lubricating oil overflowing from the second supporting structure to the first supporting structure.

[0013] According to some embodiments of the present invention, the oil supply structure includes an oil supply channel opened on the base, the second supporting structure is radially provided with an oil inlet hole, the oil supply channel is connected with the oil inlet hole, the inner periphery of the second supporting structure is provided with a second inner circumferential surface oil groove extending along the axial direction of the rotating shaft, and the oil inlet hole is connected with the second inner circumferential surface oil groove.

[0014] According to some embodiments of the present invention, the guide channel is a cavity formed by the second supporting structure, the inner wall of the base, the outer peripheral surface of the rotating shaft, and the thrust structure.

[0015] According to some embodiments of the present invention, an annular groove is provided on the outer circumferential surface of the second support structure, a plurality of oil inlet holes are provided and are arranged at intervals along the circumference of the rotating shaft, the oil inlet holes are opened at the bottom of the annular groove, and the oil supply channel is connected to the oil inlet holes through the annular groove.

[0016] According to the modification method of the shaft support mechanism of the second embodiment of the present invention, it is used to modify the existing shaft support mechanism into the shaft support mechanism described in the first embodiment of the present invention. The existing shaft support mechanism includes: a base, an upper rolling bearing, a lower rolling bearing and an oil supply structure. The base includes a main body shell, an upper end cover and a lower end cover. The rotating shaft is rotatably arranged on the main body shell through the upper rolling bearing and the lower rolling bearing. The upper end cover is installed on the upper end of the main body shell. The upper end cover and the rotating shaft clamp and fix the upper rolling bearing. The lower end cover is installed on the lower end of the main body shell. The lower end of the rotating shaft is installed with a shaft pressure cover. The lower end cover and the main body shell clamp and fix the outer ring of the lower rolling bearing. The shaft pressure cover and the rotating shaft clamp and fix the inner ring of the lower rolling bearing. , the oil supply structure is arranged on the upper end cover; the modification method comprises the following steps: cutting the main body shell and the upper end cover to form an upper fixing groove adapted to the outer periphery of the second supporting structure on the main body shell and the upper end cover, replacing the upper rolling bearing with the second supporting structure, installing the outer periphery of the second supporting structure on the upper fixing groove, so that the main body shell and the upper end cover clamp and fix the second supporting structure; modifying the oil supply structure to the main body shell so that it is opposite to the second supporting structure; removing the lower rolling bearing, clamping and fixing the first supporting structure by the lower end cover and the main body shell, changing the size of the shaft pressure cover so that it can clamp and fix the thrust structure with the rotating shaft, and then combining the first supporting structure and the thrust structure.

[0017] The modification method of the shaft support mechanism according to the embodiment of the present invention has at least the following technical effects: by using the modification method to modify the existing shaft support mechanism, the modification of the original structure is minimal, the process is simple, and it is easy to implement.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the flow of lubricating oil in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a structure in which the thrust structure and the first support structure are separated axially by a predetermined distance;

[0023] Figure 4 It is a structural schematic diagram of a combination of a thrust structure and a first supporting structure according to an embodiment of the present invention;

[0024] Figure 5 is a cross-sectional view of a thrust structure according to an embodiment of the present invention;

[0025] Figure 6 A top view of a thrust structure according to an embodiment of the present invention;

[0026] Figure 7 is a cross-sectional view of a first supporting structure according to an embodiment of the present invention;

[0027] Figure 8 is a top view of a first supporting structure according to an embodiment of the present invention;

[0028] Fig. 9 is a cross-sectional view of a second supporting structure according to an embodiment of the present invention;

[0029] Fig.10 is a top view of a second supporting structure according to an embodiment of the present invention;

[0030] Fig.11 It is a structural schematic diagram of an existing shaft support mechanism.

[0031] Reference numerals:

[0032] Rotating shaft 100;

[0033] Base 200, main body shell 210, upper end cover 220, lower end cover 230, upper fixing groove 240;

[0034] Thrust structure 300, thrust abutment surface 310, oil receiving surface 320, oil guide hole 330;

[0035] A first support structure 400, a thrust support surface 410, a first thrust surface oil groove 411, a second thrust surface oil groove 412, and a first inner peripheral surface oil groove 420;

[0036] The second support structure 500, the oil inlet hole 510, the second inner peripheral surface oil groove 520, and the annular groove 530;

[0037] Oil supply structure 600, oil supply channel 610, pipeline connector 620;

[0038] Gap channel 700;

[0039] Guide channel 800;

[0040] Upper rolling bearing 900;

[0041] Lower rolling bearing 1000;

[0042] Shaft pressure cover 1100. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0048] Reference Figures 1 to 4 , the shaft support mechanism is used to vertically support the rotating shaft 100, and the shaft support mechanism includes: a base 200, a thrust structure 300, a first support structure 400, a second support structure 500 and an oil supply structure 600. Among them, the base 200 is a cylindrical structure, so it has an inner circumferential surface. The thrust structure 300 is annular, and the thrust structure 300 is fixedly sleeved on the outer periphery of the rotating shaft 100, so that it is fixed to the rotating shaft 100 to achieve rotation together. The thrust structure 300 is provided with a thrust abutment surface 310. The first support structure 400 is annular, and the first support structure 400 has a thrust support surface 410. The first support structure 400 is fixedly sleeved on the inner periphery of the base 200, so that it is fixed to the base 200, and the first support structure 400 is simultaneously rotatably sleeved on the outer periphery of the thrust structure 300, so that it can rotate around the thrust structure 300. The thrust support surface 410 of the first support structure 400 and the thrust abutment surface 310 of the thrust structure 300 are slidably matched with each other and are used to support the thrust abutment surface 310 to limit the thrust abutment surface 310 from moving downward, thereby achieving axial support for the thrust structure 300 .

[0049] The oil supply structure 600 is disposed on the base 200 and is used to provide lubricating oil between the abutting surfaces of the first support structure 400 and the thrust structure 300, and between the abutting surfaces of the second support structure 500 and the rotating shaft 100. The oil path of the lubricating oil is shown by the dotted arrow line in the figure. The lubricating oil input from the oil supply structure 600 flows downward after passing through the second support structure 500 and reaches the first support structure 400 and the thrust structure 300.

[0050] In the above-mentioned shaft support mechanism, the rotating shaft 100 is fixed with a thrust structure 300, and the thrust structure 300 cooperates with a first support structure 400 fixed to the base 200. The first support structure 400 supports the thrust abutment surface 310 of the thrust structure 300 through the thrust support surface 410, and slidably cooperates with the thrust abutment surface 310, so that the first support structure 400 can bear the axial force of the rotating shaft 100; at the same time, the first support structure 400 is rotatably sleeved on the thrust structure 300, and a second support structure 500 is arranged on the upper side of the first support structure 400, and the second support structure 500 is provided on the upper side of the first support structure 400. 00 is fixed on the base 200 and rotatably sleeved on the rotating shaft 100, the first supporting structure 400 and the second supporting structure 500 can provide radial sliding support for the rotating shaft 100; in addition, an oil supply structure is provided to supply lubricating oil to the first supporting structure 400 and the second supporting structure 500; through the above structure, the first supporting structure 400, the second supporting structure 500 and the thrust structure 300 can replace the existing upper and lower rolling bearing shaft support mechanism, the rotating shaft 100 can obtain good radial and axial sliding support, the supporting mechanism is not easy to be damaged, and has good safety and reliability.

[0051] Reference Figure 2 , Figure 5 as well as Figure 6 The thrust structure 300 is provided with an upwardly facing oil receiving surface 320, and the oil receiving surface 320 is provided with a plurality of oil guide holes 330 penetrating the thrust structure 300. In the embodiment, the plurality of oil guide holes 330 are arranged at intervals around the circumference of the rotating shaft 100, the oil guide holes 330 are arranged obliquely relative to the axis of the rotating shaft 100, and the distance between the upper end and the rotating shaft 100 is smaller than the distance between the lower end and the rotating shaft 100, the lower end opening of the oil guide hole 330 faces the first supporting structure 400, and is used to transport lubricating oil to the thrust supporting surface 410 and the inner periphery of the first supporting structure 400.

[0052] When the shaft support mechanism is working, the oil supply structure 600 can supply oil to the oil receiving surface 320. When the lubricating oil provided by the oil supply structure 600 is delivered to the oil receiving surface 320 of the thrust structure 300, it can flow into the multiple oil guide holes 330. The lubricating oil flowing out from the lower end opening of the oil guide hole 330 lubricates the thrust support surface 410 and the inner periphery of the first support structure 400. Since the oil guide hole 330 is an inclined hole that penetrates the thrust structure 300, when the thrust structure 300 rotates with the rotating shaft 100, the lubricating oil in the oil guide hole 330 is accelerated to move radially outward under the action of centrifugal force, and continuously flows out from the orifice at the lower end of the oil guide hole 330. At the same time, the oil guide hole 330 continuously absorbs lubricating oil from the oil receiving surface 320, thereby being able to adequately and smoothly ensure the oil supply to the thrust support surface 410 and the inner periphery of the first support structure 400, which can effectively ensure the lubricity between the thrust structure 300 and the first support structure 400, and further effectively ensure the smoothness of the movement.

[0053] In the embodiment, eight oil guide holes 330 are provided and are evenly spaced. It is conceivable that the oil guide holes 330 are not limited to being provided with eight holes, and those skilled in the art can reasonably configure the specific number of holes as needed. In some embodiments, the oil guide holes 330 may not be evenly spaced, and different arrangement intervals are allowed, which can be configured according to actual conditions.

[0054] In the embodiment, the first support structure 400 is a cylindrical structure, and a sink groove is set at one end of the inner hole of the cylindrical structure, and the thrust support surface 410 is the bottom of the sink groove. The thrust structure 300 includes a cylindrical body and a flange set at one end of the cylindrical body, and the thrust abutment surface 310 is the lower end surface of the flange, and the flange is accommodated in the sink groove set in the first support structure 400. It can be imagined that the first support structure 400 and the thrust structure 300 are not limited to the above-mentioned shape structure, and the technicians in this field can reasonably configure the shape structure of the first support structure 400 and the thrust structure 300 according to the actual situation. In the embodiment, the upper end surface of the thrust structure 300 is a plane, and the plane is the aforementioned oil receiving surface 320. It can be understood that in some embodiments, if the thrust structure 300 is other shapes, then the oil receiving surface 320 is not limited to the upper end surface of the thrust structure 300, and it can also be a surface at other positions of the thrust structure 300.

[0055] In the embodiment, the lower end opening of the oil guide hole 330 faces the thrust support surface 410. Figure 2 , Figure 7 as well as Figure 8 The thrust support surface 410 is provided with a first thrust surface oil groove 411 extending in the radial direction of the rotating shaft 100, and the inner circumference of the first support structure 400 is provided with a first inner circumferential surface oil groove 420 corresponding to the first thrust surface oil groove 411. The first inner circumferential surface oil groove 420 extends in the axial direction of the rotating shaft 100, and one end of the first thrust surface oil groove 411 close to the rotating shaft 100 is connected to the upper end of the first inner circumferential surface oil groove 420. During the rotation of the rotating shaft 100, the lubricating oil flowing out of the oil guide hole 330 can first flow to the thrust support surface 410 and be enriched in the first thrust surface oil groove 411. The lubricating oil in the first thrust surface oil groove 411 can flow to the first inner circumferential surface oil groove 420 connected thereto. During the rotation of the rotating shaft 100, the lubricating oil in the first thrust surface oil groove 411 and the first inner circumferential surface oil groove 420 is brought to the thrust structure 300, thereby completing lubrication. With the above structure, the lubricating oil flows from the first thrust surface oil groove 411 to the first inner peripheral surface oil groove 420, so that the lubricating oil supply from top to bottom can be formed. The oil circuit structure is simple, easy to implement, and the lubricating oil flows smoothly.

[0056] It is conceivable that, in some embodiments, the oil guide holes 330 are not limited to the above-mentioned structure to realize the oil supply to the thrust support surface 410 and the inner periphery of the first support structure 400. For example, a part of the oil guide holes 330 is provided to directly supply oil to the thrust support surface 410 while another part of the oil guide holes 330 is provided to directly supply oil to the inner periphery of the first support structure 400, and so on. Those skilled in the art can reasonably configure the oil supply method of the oil guide holes 330 to the thrust support surface 410 and the inner periphery of the first support structure 400 as needed.

[0057] In the embodiment, the first thrust surface oil grooves 411 and the first inner circumferential surface oil grooves 420 are provided in a plurality of groups corresponding to each other and are arranged at intervals along the circumference of the rotating shaft 100. The thrust support surface 410 is also provided with a plurality of second thrust surface oil grooves 412 extending along the radial direction of the rotating shaft 100, and one second thrust surface oil groove 412 is provided between any two first thrust surface oil grooves 411. In some embodiments, more than one second thrust surface oil groove 412 may be provided between any two first thrust surface oil grooves 411. The lubrication effect of providing a plurality of groups of first thrust surface oil grooves 411 and first inner circumferential surface oil grooves 420 is good, and the second thrust surface oil grooves 412 are further provided between the first thrust surface oil grooves 411, and the second thrust surface oil grooves 412 are not connected with the corresponding first inner circumferential surface oil grooves 420, so that the lubricating oil can be better retained for the thrust support surface 410, and the lubricating oil of the thrust support surface 410 is prevented from flowing downward too quickly. In addition, the lubricating oil of the thrust support surface 410 on the upper side is relatively enriched, thereby ensuring the supply of lubricating oil to the first inner peripheral surface oil groove 420 on the lower side. In the embodiment, a total of four groups of the first thrust surface oil grooves 411 and the first inner peripheral surface oil grooves 420 are provided, and four second thrust surface oil grooves 412 are provided. It can be imagined that the number of the first thrust surface oil grooves 411, the first inner peripheral surface oil grooves 420 and the second thrust surface oil grooves 412 is not limited to the embodiment shown in the drawings, and those skilled in the art can reasonably configure their number according to actual conditions. In addition, the various oil grooves mentioned above can be arranged in a circumferentially uniformly spaced manner, or in an unequally spaced manner, and can be specifically configured according to actual conditions.

[0058] In the embodiment, the lower end opening of the oil guide hole 330 is opposite to the end of the thrust support surface 410 close to the rotating shaft 100, so that oil can be supplied from a position close to the inner periphery of the first support structure 400, reducing the oil supply distance to the first inner periphery oil groove 420. It is conceivable that in some embodiments, the lower end opening of the oil guide hole 330 can also be opposite to other positions of the thrust support surface 410 without being limited to the embodiments shown in the drawings, and those skilled in the art can make specific configurations according to actual conditions.

[0059] In the embodiment, a gap channel 700 extending in the up-down direction is formed between the outer periphery of the thrust structure 300 and the first support structure 400, the gap channel 700 is open at the upper and lower ends, the upper end opening of the gap channel 700 is adjacent to the oil receiving surface 320, and the lower end opening of the gap channel 700 is connected to the first thrust surface oil groove 411. With the above structure, the first thrust surface oil groove 411 can be further supplied with oil through the gap channel 700, and the oil supply is more sufficient.

[0060] In the embodiment, the lower end opening of the gap channel 700 is opposite to the end of the thrust support surface 410 away from the rotating shaft 100, so that lubricating oil can be supplied to it from the end of the thrust support surface 410 away from the rotating shaft 100. Combined with the structure of the oil guide hole 330 supplying lubricating oil to it from the end of the thrust support surface 410 close to the rotating shaft 100, the thrust support surface 410 is sufficiently and evenly supplied with lubricating oil.

[0061] In the embodiment, the oil supply structure 600 is used to supply lubricating oil to the second support structure 500, and the shaft support mechanism is also provided with a guide channel 800, and the guide channel 800 is used to guide the lubricating oil overflowing from the second support structure 500 to the first support structure 400. The oil supply structure 600 first supplies lubricating oil to the second support structure 500, and the excess lubricating oil overflowing is then guided to the first support structure 400 through the guide channel 800, thereby forming an oil path from top to bottom, and the oil supply structure is simple. It is conceivable that in some embodiments, the first support structure 400 and the second support structure 500 can also be separately configured with corresponding oil supply structures 600 to supply oil respectively, so as not to be limited to the implementation shown in the drawings.

[0062] Reference Figure 2 , Fig. 9 as well as Fig.10 The oil supply structure 600 includes an oil supply channel 610 provided on the base 200, an oil inlet hole 510 is provided in the radial direction of the second support structure 500, and the oil supply channel 610 is connected to the end of the oil inlet hole 510 away from the rotating shaft 100, and the inner periphery of the second support structure 500 is provided with a second inner peripheral surface oil groove 520 extending along the axial direction of the rotating shaft 100, and the end of the oil inlet hole 510 close to the rotating shaft 100 is connected to the second inner peripheral surface oil groove 520. The lubricating oil supplied by the oil supply channel 610 can be transported to the second inner peripheral surface oil groove 520 of the second support structure 500 through the oil inlet hole 510, so as to lubricate the surfaces of the rotating shaft 100 and the second support structure 500 that cooperate with each other. In the embodiment, the oil supply structure 600 also includes a pipeline joint 620 provided on the base 200, and the joint channel of the pipeline joint 620 is connected to the oil supply channel 610, and the pipeline joint 620 is used to connect with the oil supply pipeline.

[0063] In the embodiment, the base 200 is a shell structure, the rotating shaft 100 is disposed inside the base 200, and the guide channel 800 is a cavity enclosed by the second support structure 500, the inner side wall of the base 200, the outer peripheral surface of the rotating shaft 100, and the thrust structure 300. Excess lubricating oil supplied to the second support structure 500 can flow out between the second support structure 500 and the rotating shaft 100, flow downward to the aforementioned cavity by gravity, and finally fall to the thrust structure 300, so that lubricating oil can be supplied to the oil receiving surface 320 of the thrust structure 300. It is conceivable that the guide channel 800 is not limited to the above-mentioned structure, for example, it can be an oil guide channel opened in the rotating shaft 100 or the base 200, or an oil guide pipe, etc.

[0064] In an embodiment, the upper end opening of the oil guide hole 330 is adjacent to the circumferential surface of the rotating shaft 100, and the lubricating oil flowing out from the inner side of the second support structure 500 can fall down along the rotating shaft 100 and flow to the upper end opening of the oil guide hole 330, thereby providing sufficient lubricating oil to the oil guide hole 330.

[0065] In the embodiment, the oil supply structure 600 is mainly an oil supply channel 610 opened on the base 200. It is conceivable that the oil supply structure 600 is not limited to the oil supply channel 610. For example, it can also be an oil supply nozzle, a supply dropper bottle, etc., which can be specifically configured according to actual conditions.

[0066] In the embodiment, an annular groove 530 is provided on the outer circumference of the second support structure 500, a plurality of oil inlet holes 510 are provided and arranged at intervals along the circumference of the rotating shaft 100, the oil inlet holes 510 are provided at the groove bottom of the annular groove 530, and the oil supply channel 610 is connected with the oil inlet hole 510 through the annular groove 530. With the above structure, the oil supply channel 610 can supply oil to the annular groove 530, thereby uniformly supplying oil to each oil inlet hole 510, which is highly efficient. In the embodiment, the second inner circumferential surface oil groove 520 is provided in one-to-one correspondence with the oil inlet hole 510, thereby forming a plurality of groups of oil inlet structures.

[0067] In the embodiment, the oil inlet holes 510 and the second inner circumferential surface oil grooves 520 of the second support structure 500 are provided in eight groups and are evenly arranged along the circumferential direction. It is conceivable that in some embodiments, the number of the oil inlet holes 510 and the second inner circumferential surface oil grooves 520 is not limited to the embodiment shown in the drawings, and the arrangement is not limited to the even arrangement, and those skilled in the art can make specific configurations according to actual conditions.

[0068] In the embodiment, the second support structure 500 is a circular ring structure, which is simple in structure and easy to manufacture. Of course, in some embodiments, the second support structure 500 may also be other shapes and structures, which can be configured according to actual conditions.

[0069] The transformation method of the shaft support mechanism provided by the present invention is used to transform the existing shaft support mechanism into the shaft support mechanism of the first embodiment of the present invention. Fig.11 , which includes: a base 200, an upper rolling bearing 900, a lower rolling bearing 1000 and an oil supply structure 600. The base 200 includes a main shell 210, an upper end cover 220 and a lower end cover 230. The rotating shaft 100 is rotatably arranged on the main shell 210 through the upper rolling bearing 900 and the lower rolling bearing 1000. The upper end cover 220 is installed on the upper end of the main shell 210. The upper end cover 220 and the rotating shaft 100 clamp and fix the upper rolling bearing 900. The lower end cover 230 is installed on the lower end of the main shell 210. The lower end cover 1100 is installed on the lower end of the rotating shaft 100. The lower end cover 230 and the main shell 210 clamp and fix the outer ring of the lower rolling bearing 1000. The shaft pressure cover 1100 and the rotating shaft 100 clamp and fix the inner ring of the lower rolling bearing 1000. The oil supply structure 600 is arranged on the upper end cover 220.

[0070] The transformation method includes the following steps:

[0071] 1. Cut the main shell 210 and the upper end cover 220 to form an upper fixing groove 240 that matches the outer periphery of the second support structure 500 on the main shell 210 and the upper end cover 220, replace the upper rolling bearing 900 with the second support structure 500, and install the outer periphery of the second support structure 500 in the upper fixing groove 240, so that the main shell 210 and the upper end cover 220 clamp and fix the second support structure 500.

[0072] 2. Modify the oil supply structure 600 to the main body shell 210 so that it is opposite to the second support structure 500.

[0073] 3. Remove the lower rolling bearing 1000, clamp and fix the first support structure 400 through the lower end cover 230 and the main body shell 210, change the size of the shaft pressure cover 1100 so that it can clamp and fix the thrust structure 300 with the rotating shaft 100, and then combine the first support structure 400 and the thrust structure 300. In the embodiment, the method of changing the size of the shaft pressure cover 1100 can be specifically to increase the height by welding, or to fix a heightened cushion, or to re-manufacture the shaft pressure cover 1100 of a new size.

[0074] It is understandable that the order of steps of the above transformation method can also be adjusted and can be specifically configured according to actual conditions. By using the above transformation method to transform the existing shaft support mechanism, the original structure is modified less, the process is simple, and it is easy to implement.

[0075] In the embodiment, the second support structure 500 and the main body shell 210 may adopt H6 / h6 tolerance fit, the thrust structure 300 and the shaft 100 may adopt H7 / p6 tolerance fit, and the first support structure 400 and the main body shell 210 may adopt H6 / h6 tolerance fit. Of course, it is understandable that those skilled in the art may also select other appropriate tolerance fit methods according to actual conditions without being limited to the above embodiments.

[0076] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A shaft support mechanism, used to support a vertically arranged rotating shaft (100), characterized in that: The shaft support mechanism comprises: A base (200) is cylindrical; The thrust structure (300) is annular, fixedly sleeved on the outer circumference of the rotating shaft (100), and is provided with a thrust abutment surface (310); The first support structure (400) is annular and fixedly sleeved on the inner periphery of the base (200) and rotatably sleeved on the outer periphery of the thrust structure (300). The first support structure (400) has a thrust support surface (410). The thrust support surface (410) and the thrust abutment surface (310) are slidably matched with each other and are used to support the thrust abutment surface (310) to limit the downward movement of the thrust abutment surface (310). The second support structure (500) is annular and is disposed above the thrust structure (300). The second support structure (500) is fixedly sleeved on the inner periphery of the base (200) and rotatably sleeved on the outer periphery of the rotating shaft (100); An oil supply structure (600) is arranged on the base (200) and is used to provide lubricating oil between the abutting surfaces of the first supporting structure (400) and the thrust structure (300), and between the abutting surfaces of the second supporting structure (500) and the rotating shaft (100).

2. The shaft support mechanism according to claim 1, characterized in that: The thrust structure (300) is provided with an oil receiving surface (320) facing upwards, and the oil supply structure (600) is configured to supply oil to the oil receiving surface (320). The oil receiving surface (320) is provided with a plurality of oil guide holes (330) penetrating the thrust structure (300). The plurality of oil guide holes (330) are arranged at intervals around the rotating shaft (100). The oil guide holes (330) are arranged obliquely relative to the axis of the rotating shaft (100), and the distance between the upper end and the rotating shaft (100) is smaller than the distance between the lower end and the rotating shaft (100). The lower end opening of the oil guide hole (330) faces the first supporting structure (400) and is used to transport lubricating oil to the thrust supporting surface (410) and the inner periphery of the first supporting structure (400).

3. The shaft support mechanism according to claim 2, characterized in that: The lower end opening of the oil guide hole (330) faces the thrust support surface (410), and the thrust support surface (410) is provided with a first thrust surface oil groove (411) extending radially along the rotating shaft (100). The inner periphery of the first support structure (400) is provided with a first inner circumferential surface oil groove (420) corresponding to the first thrust surface oil groove (411), and the first inner circumferential surface oil groove (420) extends axially along the rotating shaft (100), and one end of the first thrust surface oil groove (411) close to the rotating shaft (100) is connected to the upper end of the first inner circumferential surface oil groove (420).

4. The shaft support mechanism according to claim 3, characterized in that: The first thrust surface oil grooves (411) and the first inner circumferential surface oil grooves (420) are provided in a plurality of groups in a one-to-one correspondence and are arranged at intervals along the circumference of the rotating shaft (100); The thrust support surface (410) is further provided with a plurality of second thrust surface oil grooves (412) extending in the radial direction of the rotating shaft (100), and at least one second thrust surface oil groove (412) is provided between any two of the first thrust surface oil grooves (411).

5. The shaft support mechanism according to claim 3, characterized in that: A gap channel (700) extending in the up-down direction is formed between the outer periphery of the thrust structure (300) and the first support structure (400); the upper and lower ends of the gap channel (700) are open; the upper end opening of the gap channel (700) is adjacent to the oil receiving surface (320); and the lower end opening of the gap channel (700) is connected to the first thrust surface oil groove (411).

6. The shaft support mechanism according to claim 1, characterized in that: The oil supply structure (600) is used to supply lubricating oil to the second supporting structure (500), and the shaft supporting mechanism is also provided with a guide channel (800), and the guide channel (800) is used to guide the lubricating oil overflowing from the second supporting structure (500) to the first supporting structure (400).

7. The shaft support mechanism according to claim 6, characterized in that: The oil supply structure (600) comprises an oil supply channel (610) opened on the base (200); the second support structure (500) is provided with an oil inlet hole (510) in a radial direction; the oil supply channel (610) is communicated with the oil inlet hole (510); the inner periphery of the second support structure (500) is provided with a second inner circumferential surface oil groove (520) extending along the axial direction of the rotating shaft (100); the oil inlet hole (510) is communicated with the second inner circumferential surface oil groove (520).

8. The shaft support mechanism according to claim 6, characterized in that: The guide channel (800) is a cavity enclosed and formed by the second support structure (500), the inner wall of the base (200), the outer peripheral surface of the rotating shaft (100), and the thrust structure (300).

9. The shaft support mechanism according to claim 7, characterized in that: An annular groove (530) is provided on the outer circumferential surface of the second supporting structure (500); a plurality of oil inlet holes (510) are provided and are arranged at intervals along the circumference of the rotating shaft (100); the oil inlet holes (510) are provided at the bottom of the annular groove (530); and the oil supply channel (610) is connected to the oil inlet holes (510) through the annular groove (530).

10. A method for modifying a shaft support mechanism, characterized in that: Used to transform an existing shaft support mechanism into the shaft support mechanism according to any one of claims 1 to 9, the existing shaft support mechanism comprises: a base (200), an upper rolling bearing (900), a lower rolling bearing (1000) and an oil supply structure (600), the base (200) comprises a main body shell (210), an upper end cover (220) and a lower end cover (230), the rotating shaft (100) is rotatably arranged on the main body shell (210) through the upper rolling bearing (900) and the lower rolling bearing (1000), and the upper end cover (220) is installed on the main body shell (210) The upper end cover (220) and the rotating shaft (100) clamp and fix the upper rolling bearing (900), the lower end cover (230) is installed on the lower end of the main body shell (210), the lower end of the rotating shaft (100) is installed with a shaft pressure cover (1100), the lower end cover (230) and the main body shell (210) clamp and fix the outer ring of the lower rolling bearing (1000), the shaft pressure cover (1100) and the rotating shaft (100) clamp and fix the inner ring of the lower rolling bearing (1000), and the oil supply structure (600) is arranged on the upper end cover (220); The transformation method comprises the following steps: Cutting the main body shell (210) and the upper end cover (220) to form an upper fixing groove (240) on the main body shell (210) and the upper end cover (220) that matches the outer periphery of the second support structure (500), replacing the upper rolling bearing (900) with the second support structure (500), and installing the outer periphery of the second support structure (500) in the upper fixing groove (240), so that the main body shell (210) and the upper end cover (220) clamp and fix the second support structure (500); Modifying the oil supply structure (600) to the main body shell (210) so as to be opposite to the second support structure (500); The lower rolling bearing (1000) is removed, the first support structure (400) is clamped and fixed by the lower end cover (230) and the main body shell (210), the size of the shaft pressure cover (1100) is changed so that it can clamp and fix the thrust structure (300) with the rotating shaft (100), and then the first support structure (400) and the thrust structure (300) are combined.

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