WO2022100354A1

WO2022100354A1 - Nut bearing seat

Info

Publication number: WO2022100354A1
Application number: PCT/CN2021/123824
Authority: WO
Inventors: 朱顺明; 朱潇敏
Original assignee: 江苏吉达粉体工程设计研究院有限公司
Priority date: 2020-11-16
Filing date: 2021-10-14
Publication date: 2022-05-19
Also published as: CN112392860B; CN112392860A

Abstract

A nut bearing seat, comprising: a bearing seat (1) and a press cover (2), wherein the press cover (2) is provided at the bottom end of the bearing seat (1), bearing seat (1) sleeves the outer side of a middle through pipe (3), the middle through pipe (3) sleeves the outer side of a shaft (4), the bearing seat (1) is connected to the shaft (4) by means of a bearing (5), and the bearing (5) is arranged below the middle through pipe (3). The bearing seat (1) and the middle through pipe (3) are connected by means of threads instead of by means of welding, riveting, gluing or integral casting piece fabrication, a bearing is arranged between the bearing seat and the shaft, the diameter of the shaft can be increased to a certain extent, and the provided press cover may support the bearing and the bearing seat, thus further securely connecting the bearing seat to the middle through pipe. When suitable for multiple shafts to be connected by means of the bearing, the diameter of the shaft is increased, thus ensuring the strength of the shafts when working.

Description

A nut bearing seat

technical field

The present invention relates to the technical field of bearing housings, and more particularly, the present invention relates to a nut bearing housing.

Background technique

In the field of multi-shaft multi-rotor powder separator manufacturing, the shafts are connected by bearings to realize that multiple shafts can have different rotational speeds to improve the powder separation efficiency, but multiple shafts are concentrically arranged, and the bearings It is mostly set in the gap between the two shafts, resulting in a very small diameter of the shaft inside, which affects the stiffness of the shaft. Therefore, it is necessary to propose a nut bearing seat to at least partially solve the problems existing in the prior art.

SUMMARY OF THE INVENTION

A series of concepts in simplified form have been introduced in the Summary section, which are described in further detail in the Detailed Description section. The Summary of the Invention section of the present invention is not intended to attempt to limit the key features and essential technical features of the claimed technical solution, nor is it intended to attempt to determine the protection scope of the claimed technical solution.

In order to at least partially solve the above problems, the present invention provides a nut bearing seat, comprising: a bearing seat and a gland, the gland is arranged at the bottom end of the bearing seat, and the bearing seat is sleeved on the middle through pipe The outer side of the intermediate through pipe is sleeved on the outer side of the shaft, the bearing seat is connected with the shaft through a bearing, and the bearing is arranged below the intermediate through pipe.

Preferably, the top end of the bearing seat is provided with a first threaded hole along its axis, and a first circular hole is provided below the first threaded hole; the first circular hole corresponds to the outer diameter of the bearing , the diameter of the first threaded hole is smaller than the diameter of the first circular hole.

Preferably, it further includes a plurality of connecting assemblies, and the plurality of connecting assemblies are arranged in the bearing seat; the outer peripheral wall of the bearing seat is provided with a plurality of multi-segment holes arranged perpendicular to its axis, and the connecting assemblies are arranged in the bearing seat. in the multi-segment hole.

Preferably, the lower end of the intermediate through pipe is connected with the bearing seat, and the lower end of the intermediate through pipe is provided with an external thread, and a plurality of helical teeth are provided below the external thread, and a plurality of the helical teeth are provided. uniformly distributed along the circumferential direction of the intermediate through-pipe; a plurality of the helical teeth are clamped with one end of the connecting component protruding from the first threaded hole of the bearing seat.

Preferably, one end of the multi-segment hole away from the intermediate through pipe is provided with a second circular hole, and one end of the second circular hole close to the intermediate through pipe is sequentially communicated with a conical hole arranged coaxially therewith, The third round hole, the fourth round hole, the fifth round hole and the sixth round hole, the diameter of the second round hole is equal to the diameter of the third round hole, and the tapered hole is close to the second round hole The diameter of one end of the hole is smaller than the diameter of the other end, the diameter of the fourth circular hole is larger than the diameter of the third circular hole, and is larger than the diameter of the fifth circular hole, and the diameter of the fifth circular hole is larger than that of the The diameter of the sixth circular hole.

Preferably, the connection assembly includes: a clip sleeve, a clip rod, and an elastic member, one end of the clip sleeve is inserted into and clipped into the multi-segment holes, and one end of the clip joint rod is inserted into the clip sleeve and clipped. The elastic member is selectively clamped inside the ferrule, one end of the elastic member is connected with the ferrule, and the other end is connected on the plane formed between the fifth round hole and the sixth round hole.

Preferably, the ferrule includes: a ferrule body and a plurality of spheres, the plurality of spheres are evenly arranged on the outer peripheral wall of the ferrule body, and the ferrule body is close to one end of the intermediate through pipe. A clamping table is provided on the outer peripheral wall, and at least one opening parallel to the axis of the clamping sleeve body is provided on the side wall of one end of the clamping sleeve body where the clamping table is located, and one end of the clamping sleeve body can be passed through in sequence. Through the second round hole, the tapered hole, the third round hole, and into the fourth round hole, the clamping table is slidably arranged in the middle position of the fourth round hole, and all the The outer diameter of the clamping table is larger than the diameter of the third circular hole, and the outer diameter of the clamping table is larger than the diameter of the fifth circular hole.

Preferably, an end of the ferrule body away from the ferrule is provided with a seventh round hole, an end of the seventh round hole close to the ferrule is communicated with an eighth round hole, and the end of the eighth round hole is connected to the The diameter is larger than the diameter of the seventh round hole, and one end of the elastic member is connected to the plane formed between the eighth round hole and the seventh round hole; the inner peripheral wall of the seventh round hole A plurality of sphere mounting holes corresponding to the spheres are evenly distributed, the spheres are movably arranged in the sphere mounting holes, and the spheres protrude from the inner peripheral wall of the seventh round hole; the clamping rod Passing through the seventh round hole and the eighth round hole in sequence, the conical hole pushes the sphere, the inner side of the sphere is in contact with the clamping rod, and the outer side is in contact with the inner wall of the conical hole Abut.

Preferably, an end surface of the clamping rod close to one end of the intermediate through pipe is an inclined surface.

Preferably, the inner diameter of the bearing housing is manufactured according to the strength of the shaft, and the method for determining the strength of the shaft is as follows:

Step A1: Calculate the diameter D of the shaft:

Among them, P ₁ is the bending moment of the calculated section of the shaft, P ₂ is the torque of the calculated section of the shaft, α is the cyclic variation parameter of the bending stress and torsional stress of the shaft, and β is the surface quality of the shaft coefficient, σ _-1 is the bending endurance strength limit of the shaft under symmetrical cyclic load, [ε] is the allowable safety factor of the shaft's enduring strength;

Step A2: Determine the strength of the shaft based on its diameter:

Wherein, W ₁ is the shaft strength calculated based on the third strength theory, W ₂ is the shaft strength calculated based on the fourth strength theory, P _1w is the bending moment on the dangerous surface when the shaft is working, and P _2w is the The torque on the dangerous surface when the shaft is working, F is the bending shear stress on the dangerous surface when the shaft is working, γ is the bending section coefficient, γ=πD ³ /32, and π is a constant;

Step A3: Both W ₁ and W ₂ must satisfy W ₁ ≤[σ], W ₂ ≤[σ], where [σ] is the allowable stress of the shaft material, indicating that the diameter of the shaft satisfies the working conditions. If the strength is required, the inner diameter of the bearing seat can be determined according to the diameter of the shaft.

Compared with the prior art, the present invention at least includes the following beneficial effects:

In the nut bearing seat of the present invention, it is preferable that the bearing seat and the intermediate through pipe are connected by threads instead of welding, riveting, gluing or integral casting. A bearing is arranged between the bearing seat and the shaft, and the To a certain extent, the diameter of the shaft is increased, and the provided gland can support the bearing and the bearing seat, and further connect the bearing seat and the intermediate pipe firmly; Diameter, to ensure the strength of the shaft when working.

For a nut bearing seat of the present invention, other advantages, objectives and features of the present invention will be reflected in part by the following description, and in part will be understood by those skilled in the art through the study and practice of the present invention.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

FIG. 1 is a schematic diagram of the connection structure of a nut bearing seat according to the present invention.

FIG. 2 is a schematic structural diagram of the connection between the bearing seat and the intermediate through pipe in a nut bearing seat according to the present invention.

FIG. 3 is an enlarged schematic view of the structure of the connecting assembly in FIG. 2 .

FIG. 4 is a schematic diagram of a multi-segment hole structure of a bearing seat in a nut bearing seat according to the present invention.

FIG. 5 is a schematic structural diagram of a ferrule in a nut bearing seat according to the present invention.

6 is a schematic cross-sectional view of the position of the ball mounting hole of the ferrule in a nut bearing seat according to the present invention.

FIG. 7 is a schematic structural diagram of the clamping connection between the helical teeth and the clamping rod in a nut bearing seat according to the present invention.

FIG. 8 is a schematic structural diagram of the lower end of the intermediate through tube in a nut bearing seat according to the present invention.

1 is the bearing seat, 1-1 is the first threaded hole, 1-2 is the first round hole, 1-3 is the multi-segment hole, 1-3-1 is the second round hole, 1-3-2 is the tapered hole , 1-3-3 is the third round hole, 1-3-4 is the fourth round hole, 1-3-5 is the fifth round hole, 1-3-6 is the sixth round hole, 2 is the gland, 3 is the intermediate tube, 3-1 is the helical tooth, 4 is the shaft, 5 is the bearing, 6 is the connecting component, 6-1 is the ferrule, 6-1-1 is the ferrule body, 6-1-1-1 is the card table, 6-1-1-2 is the seventh round hole, 6-1-1-3 is the eighth round hole, 6-1-1-4 is the ball mounting hole, 6-1-2 is the ball, 6-2 is a clamping rod, and 6-3 is an elastic piece.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement the invention with reference to the description.

It should be understood that terms such as "having", "comprising" and "including" as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

As shown in FIGS. 1-8 , the present invention provides a nut bearing seat, comprising: a bearing seat 1 and a press cover 2 , the press cover 2 is arranged at the bottom end of the bearing seat 1 , and the bearing seat 1 It is sleeved on the outer side of the intermediate through pipe 3, and the intermediate through pipe 3 is sleeved on the outer side of the shaft 4. The bearing seat 1 and the shaft 4 are connected by a bearing 5, and the bearing 5 is arranged in the intermediate through below tube 3.

The working principle of the above technical solution: the intermediate through pipe 3 is sleeved on the outside of the shaft 4, the bearing 5 is sleeved on the outside of the shaft 4, the upper end of the outer ring of the bearing 5 is in contact with the lower end of the intermediate through pipe 3, and the bearing 5 The outer ring and the inner ring wall of the bearing seat 1 have an interference fit, and the bearing seat 1 and the intermediate pipe 3 are not made by welding, riveting, gluing or integral casting, but are connected by threads, and then the gland 2 It is connected with the bearing seat 1 and plays a certain supporting role for the bearing 5 and the bearing seat 1.

Beneficial effects of the above technical solutions: through the design of the above structure, it is preferable that the bearing seat 1 and the intermediate pipe 3 are connected by threads instead of welding, riveting, gluing or integral casting. The bearing 5 is arranged between, which can increase the diameter of the shaft 4 to a certain extent, and the provided gland 2 can support the bearing 5 and the bearing seat 1, and further firmly connect the bearing seat 1 and the intermediate pipe 3; and the present invention is applicable In the case where a plurality of shafts are connected through the bearing 5, the diameter of the shaft 4 is increased to ensure the strength of the shaft 4 during operation.

In one embodiment, the top end of the bearing seat 1 is provided with a first threaded hole 1-1 along its axis, and a first circular hole 1-2 is provided below the first threaded hole 1-1; A circular hole 1-2 corresponds to the outer diameter of the bearing 5, and the diameter of the first threaded hole 1-1 is smaller than the diameter of the first circular hole 1-2.

The working principle and beneficial effects of the above technical solutions: the first threaded hole 1-1 provided at the top of the bearing seat 1 is used for threaded connection with the intermediate through pipe 3, and the diameter of the first circular hole 1-2 is larger than that of the first threaded hole 1-1. 1, under the condition of ensuring the strength of the bearing seat 1 and the normal operation of the shaft 4, the diameter of the first circular hole 1-2 is maximized, and the diameter of the shaft 4 is further guaranteed to be the largest.

In one embodiment, a plurality of connecting assemblies 6 are further included, and the plurality of connecting assemblies 6 are arranged in the bearing seat 1; the outer peripheral wall of the bearing seat 1 is provided with a plurality of multi-segment holes 1 arranged perpendicular to its axis -3, the connecting components 6 are arranged in the multi-segment holes 1-3.

The working principle of the above technical solution: a plurality of connecting components 6 are arranged in the multi-segment holes 1-3, and can be movably connected with the bearing seat 1. When the bearing seat 1 is installed at the lower end of the intermediate tube 3, the connecting components 6 extend into the bearing. One end of the seat 1 is stuck with the intermediate through pipe 3 . If the bearing seat 1 needs to be loosened, the connecting assembly 6 can be pulled out from the outer side of the bearing seat 1 by extending into the end of the bearing seat 1 .

The beneficial effects of the above technical solutions: through the design of the above structure, when the bearing seat 1 is installed at the lower end of the intermediate through pipe 3, the connecting assembly 6 will be stuck and cannot be loosened, because the shaft 4 needs to be rotated for a long time during operation, and the connection The assembly 6 can prevent the bearing seat 1 from sliding down and affect the normal operation of the shaft 4 .

In one embodiment, the lower end of the intermediate through pipe 3 is connected to the bearing seat 1, and the lower end of the intermediate through pipe 3 is provided with an external thread, and a plurality of helical teeth 3- 1. A plurality of the helical teeth 3-1 are evenly distributed along the circumferential direction of the intermediate through pipe 3; the plurality of the helical teeth 3-1 and the connecting assembly 6 protrude from the first thread of the bearing seat 1 One end of hole 1-1 is snapped.

The working principle of the above technical solution: the external thread at the lower end of the intermediate pipe 3 is used for threaded connection with the bearing seat 1, the helical teeth 3-1 under the external thread are clamped with the connecting component 6, and the helical teeth 3-1 distributed in the circumferential direction are the largest. If the diameter is smaller than the diameter of the external thread, after tightening the bearing seat 1, insert one end of the connecting assembly 6 between two adjacent helical teeth 3-1 and lock it to prevent the bearing seat 1 from rotating in the opposite direction; the bearing seat 1 is loosened When , first withdraw one end of the connecting assembly 6 from between the two adjacent helical teeth 3-1, and then loosen the bearing seat 1.

The beneficial effects of the above technical solutions: through the design of the above structure, the structure is simple, and through the cooperation of the connecting component 6 and the helical teeth 3-1, the normal installation of the bearing seat 1 can be ensured, and the bearing seat 1 can be guaranteed under long-term work. There will be a decline.

In one embodiment, a second circular hole 1-3-1 is provided at one end of the multi-segment hole 1-3 away from the intermediate through-pipe 3, and the second circular hole 1-3-1 is close to the intermediate through-pipe 3. One end of the pipe 3 is sequentially communicated with a conical hole 1-3-2, a third circular hole 1-3-3, a fourth circular hole 1-3-4, and a fifth circular hole 1-3- 5. The sixth circular hole 1-3-6, the diameter of the second circular hole 1-3-1 is equal to the diameter of the third circular hole 1-3-3, the tapered hole 1-3- 2. The diameter of one end close to the second circular hole 1-3-1 is smaller than the diameter of the other end, the diameter of the fourth circular hole 1-3-4 is larger than the diameter of the third circular hole 1-3-3, and is larger than the diameter of the fifth circular hole 1-3-5, and the diameter of the fifth circular hole 1-3-5 is larger than the diameter of the sixth circular hole 1-3-6;

The connecting assembly 6 includes: a clamping sleeve 6-1, a clamping rod 6-2, and an elastic member 6-3. One end of the clamping sleeve 6-1 is inserted into and clamped into the multi-segment holes 1-3, so One end of the clamping rod 6-2 is inserted into the clamping sleeve 6-1 and selectively clamped inside the clamping sleeve 6-1, and one end of the elastic member 6-3 is connected to the clamping sleeve 6-1. connected, and the other end is connected to the plane formed between the fifth circular hole 1-3-5 and the sixth circular hole 1-3-6.

The working principle of the above technical solution: the ferrule 6-1 is clamped in the multi-segment hole 1-3, and one end of the ferrule 6-1 extending into the multi-segment hole 1-3 is slidably arranged in the fourth round hole 1-3-4, Before installing the bearing seat 1, the clamping rod 6-2 is not inserted into the ferrule 6-1. After installing the bearing seat 1, press the ferrule 6-1 with external force, and remove one end of the clamping rod 6-2 from the ferrule 6-1. 6-1 is inserted into the middle tube 3, and the external force is released. Under the action of the elastic piece 6-3, the ferrule 6-1 springs back outward, and the ferrule 6-1 can clamp the clamping rod 6-2. to limit its axial and radial displacement; when the bearing seat 1 needs to be removed, press the ferrule 6-1 with external force, and then the elastic member 6-3 is compressed, at this time the ferrule 6-2 can be removed from the The ferrule 6-1 is taken out, thereby releasing the restriction on the relative rotation between the bearing seat 1 and the intermediate through pipe 3, and the bearing seat 1 can be removed.

The beneficial effects of the above technical solutions: the multi-segment holes 1-3 can limit the axial displacement of the ferrule 6-1, and the ferrule 6-1 can limit the axial and radial displacement of the clamping rod 6-2, thereby making the clamping rod 6-2 can be stably connected in the bearing seat 1, and ensure that the bearing seat 1 and the intermediate pipe 3 do not rotate relative to each other during operation, and the clamping rod 6-2 is stuck in two adjacent obliques of the intermediate pipe 3. Between the teeth 3-1, the helical teeth 3-1 are located in the middle part of the external thread of the intermediate pipe 3, which can also prevent the bearing seat 1 from sliding down to a certain extent, ensuring the working stability of the bearing seat 1, and thus ensuring the middle Safety when working through pipe 3 and shaft 4.

In one embodiment, the ferrule 6-1 includes: a ferrule body 6-1-1, a plurality of spheres 6-1-2, and a plurality of the spheres 6-1-2 are evenly arranged on the ferrule On the outer peripheral wall of the main body 6-1-1, a clamping table 6-1-1-1 is provided on the outer peripheral wall of the one end of the ferrule body 6-1-1 close to the middle through-pipe 3. The clamping table At least one opening parallel to the axis of the ferrule body 6-1-1 is provided on the side wall of one end of the ferrule body 6-1-1 where 6-1-1-1 is located. One end of 6-1-1 can pass through the second round hole 1-3-1, the tapered hole 1-3-2, the third round hole 1-3-3 in sequence, and enter the In the fourth circular hole 1-3-4, the clamping table 6-1-1-1 is slidably arranged in the middle position of the fourth circular hole 1-3-4, and the clamping table 6-1-1 The outer diameter of -1 is larger than the diameter of the third circular hole 1-3-3, and the outer diameter of the clamping table 6-1-1-1 is larger than the diameter of the fifth circular hole 1-3-5;

A seventh round hole 6-1-1-2 is provided at one end of the card sleeve body 6-1-1 away from the card table 6-1-1-1. The seventh round hole 6-1-1- 2. An eighth round hole 6-1-1-3 is communicated with one end close to the card table 6-1-1-1, and the diameter of the eighth round hole 6-1-1-3 is larger than that of the seventh round hole The diameter of the hole 6-1-1-2, and one end of the elastic member 6-3 is connected to the eighth circular hole 6-1-1-3 and the seventh circular hole 6-1-1-2 On the plane formed between them; a plurality of spherical mounting holes 6-1-1-4 corresponding to the spherical body 6-1-2 are evenly distributed on the inner peripheral wall of the seventh circular hole 6-1-1-2 , the sphere 6-1-2 is movably arranged in the sphere mounting hole 6-1-1-4, and the sphere 6-1-2 extends from the seventh round hole 6-1-1-2 The inner peripheral wall protrudes; the clamping rod 6-2 passes through the seventh round hole 6-1-1-2 and the eighth round hole 6-1-1-3 in sequence, and the tapered hole 1 -3-2 Push the sphere 6-1-2, the inner side of the sphere 6-1-2 is in contact with the clamping rod 6-2, and the outer side is in contact with the inner wall of the tapered hole 1-3-2 Abut;

The end surface of the clamping rod 6-2 close to one end of the intermediate through-pipe 3 is an inclined surface.

The working principle of the above technical solution: the card table 6-1-1-1 can only slide in the fourth round hole 1-3-4, and will not come out, and the movable range of the sphere 6-1-2 is limited to the cone. In the shaped hole 1-3-2, when installing the clamping rod 6-2, press the clamping sleeve body 6-1-1 in the direction of the bearing seat 1 with an external force, the elastic member 6-3 is compressed, and the ball 6- 1-2 Roll in the direction with the larger diameter of the tapered hole 1-3-2, the pressure between the ball 6-1-2 and the side wall of the tapered hole 1-3-2 is reduced, and the clamping rod 6- 2 Insert into the ferrule, and make one end of the clamping rod 6-2 inserted into the intermediate through pipe 3, so that the inclined surface of the clamping rod 6-2 is clamped with the helical teeth 3-1 on the intermediate through pipe 3 , after inserting in place, remove the external force, the ferrule 6-1 moves outward under the action of the elastic piece 6-3, at this time the ball 6-1-2 receives the elastic force of the elastic piece 6-3 to push the ferrule 6-1 outward Under the action, the sphere 6-1-2 moves in the conical hole 1-3-2 to the end with the smaller diameter of the conical hole 1-3-2. At this time, the sphere 6-1-2 and the conical hole 1-3- The pressure and friction between the inner walls of Restrict the axial and radial movement of the clamping rod 6-2; when removing the clamping rod 6-2, also press the clamping sleeve body 6-1-1 in the direction of the bearing seat 1 with external force, and the elastic member 6- 3 is compressed, the ball 6-1-2 rolls in the direction with the larger diameter of the conical hole 1-3-2, at this time the pressure and friction between the ball 6-1-2 and the clamping rod 6-2 are reduced. Small, the clamping rod 6-2 can be taken out from the clamping sleeve 6-1.

The beneficial effects of the above technical solutions: the clamping table 6-1-1-1 and the elastic member 6-3 confine the clamping sleeve 6-1 in the multi-segment hole 1-3, and the clamping rod 6-2 passes through the elastic member 6-3 , Under the joint action of the ferrule body 6-1-1 and the ball 6-1-2, it can be clamped or disengaged in the ferrule 6-1, which can be realized only by external force; when the bearing seat 1 is working, the centrifugal force Under the action of the clamping rod 6-2 and the clamping sleeve 6-1, the clamping rod 6-2 and the clamping sleeve 6-1 will only get tighter and tighter, thereby ensuring that the clamping rod 6-2 and the intermediate pipe 3 are firmly clamped, and the clamping rod 6-2 will not fall off. In the case of falling, the safety of the shaft 4 and the intermediate through pipe 3 is greatly improved, and further prevents the bearing seat 1 from sliding off the intermediate through pipe 3, so that the bearing seat 1 is more stable in use.

In one embodiment, the inner diameter of the bearing housing 1 is manufactured according to the strength of the shaft, and the method for determining the strength of the shaft 4 is as follows:

Step A1: Calculate the diameter D of the shaft 4:

Among them, P ₁ is the bending moment of the calculated section of the shaft 4, P ₂ is the torque of the calculated section of the shaft 4, α is the cyclic variation parameter of the bending stress and torsional stress of the shaft 4, and β is the The surface quality coefficient of the shaft 4, σ _-1 is the bending endurance strength limit of the shaft 4 under the symmetrical cyclic load, [ε] is the allowable safety factor of the enduring strength of the shaft 4;

Step A2: Determine the strength of the shaft 4 based on its diameter:

Wherein, W ₁ is the strength of the shaft 4 calculated based on the third strength theory, W ₂ is the strength of the shaft 4 calculated based on the fourth strength theory, P _1w is the bending moment on the dangerous surface of the shaft 4 during operation, P _2w is the torque on the dangerous surface when the shaft 4 is working, F is the bending shear stress on the dangerous surface when the shaft 4 is working, γ is the bending section coefficient, γ=πD ³ /32, and π is a constant;

Step A3: Both W ₁ and W ₂ need to satisfy W ₁ ≤[σ], W ₂ ≤[σ], where [σ] is the allowable stress of the material of the shaft 4, indicating that the diameter of the shaft 4 satisfies its work When the strength requirements are met, the inner diameter of the bearing seat 1 can be determined according to the diameter of the shaft 4 .

The working principle of the above technical solution: Calculate the diameter of the shaft 4 based on the formula in step A1, wherein the value of [ε] is 1.1 to 2. When the bending stress and torsional stress of the shaft 4 are cyclically changed according to symmetry, the value of α is taken. The value of α is 1. When the bending stress of the shaft 4 changes according to the symmetrical cycle and the torsional stress changes according to the pulsating cycle, the value of α is 0.5; the strength of the shaft 4 is calculated from the diameter of the shaft 4, and the strength of the shaft 4 is calculated according to the formula in step A2 It is concluded that in the end, the strength values calculated according to the third strength theory and the fourth strength theory need to be compared with the allowable stress of the shaft material. If the strength value is less than or equal to the allowable stress value, it means that the diameter of the shaft 4 meets the working conditions When the strength requirements are met, the inner diameter of the bearing housing 1 is determined and manufactured according to the shaft 4 that meets the conditions.

The beneficial effects of the above technical solutions: in the manufacturing field of the multi-shaft multi-rotor powder separator, the shaft 4 is located in the center, and its diameter is the smallest among many shafts, and during operation, a rotor needs to be set on the shaft 4 for powder selection. , it is necessary to ensure the strength of the shaft so that the powder separator can work under high strength. The design of the bearing seat 1 makes full use of the internal space of the intermediate pipe 3 under the condition that the diameter of the shaft 4 is sufficient, and the shaft 4 is determined according to the above. The strength algorithm can manufacture the bearing housing 1 according to the diameter of the shaft 4 that satisfies the strength, and the diameter of the shaft 4 can be enlarged as much as possible to ensure its strength, and in step A2, the third strength theory and the fourth strength theory formula are used to calculate the shaft In both formulas, the bending shear stress of the shaft 4 is used as a factor in the calculation, which can further reduce the calculation error and prevent the shaft 4 from breaking due to insufficient strength during operation due to inaccurate calculation. The stability of the multi-shaft multi-rotor powder separator is improved.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the application listed in the description and the embodiment, and it can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims

A nut bearing seat, characterized by comprising: a bearing seat (1) and a gland (2), the gland (2) being arranged at the bottom end of the bearing seat (1), the bearing seat (1) ) is sleeved on the outer side of the intermediate through pipe (3), the intermediate through pipe (3) is sleeved on the outer side of the shaft (4), and the bearing seat (1) and the shaft (4) pass through the bearing (5) connected, and the bearing (5) is arranged below the intermediate pipe (3).
A nut bearing seat according to claim 1, characterized in that the top end of the bearing seat (1) is provided with a first threaded hole (1-1) along its axis, and the first threaded hole (1- 1) A first circular hole (1-2) is provided below; the first circular hole (1-2) corresponds to the outer diameter of the bearing (5), and the first threaded hole (1-1) ) is smaller than the diameter of the first circular hole (1-2).
The nut bearing seat according to claim 1, further comprising a plurality of connecting assemblies (6), wherein the plurality of connecting assemblies (6) are arranged in the bearing seat (1); the bearing The outer peripheral wall of the seat (1) is provided with a plurality of multi-segment holes (1-3) arranged perpendicular to its axis, and the connecting assembly (6) is arranged in the multi-segment holes (1-3).
A nut bearing seat according to claim 3, characterized in that the lower end of the intermediate through pipe (3) is connected with the bearing seat (1), and the lower end of the intermediate through pipe (3) is provided with External thread, a plurality of helical teeth (3-1) are arranged below the external thread, and the plurality of helical teeth (3-1) are evenly distributed along the circumferential direction of the intermediate through pipe (3); The helical teeth (3-1) are engaged with one end of the connecting assembly (6) protruding from the first threaded hole (1-1) of the bearing seat (1).
The nut bearing seat according to claim 3, characterized in that a second round hole (1-3-1) is provided at one end of the multi-segment hole (1-3) away from the intermediate through pipe (3) , the end of the second circular hole (1-3-1) close to the intermediate through pipe (3) is sequentially communicated with a conical hole (1-3-2) and a third circular hole ( 1-3-3), the fourth round hole (1-3-4), the fifth round hole (1-3-5), the sixth round hole (1-3-6), the second round hole ( The diameter of 1-3-1) is equal to the diameter of the third circular hole (1-3-3), and the tapered hole (1-3-2) is close to the second circular hole (1-3- 1) The diameter of one end is smaller than the diameter of the other end, the diameter of the fourth circular hole (1-3-4) is larger than the diameter of the third circular hole (1-3-3), and larger than the fifth circular hole The diameter of the hole (1-3-5), the diameter of the fifth circular hole (1-3-5) is larger than the diameter of the sixth circular hole (1-3-6).
A nut bearing seat according to claim 5, characterized in that, the connecting assembly (6) comprises: a clamping sleeve (6-1), a clamping rod (6-2), an elastic member (6-3) , one end of the ferrule (6-1) is inserted and clamped in the multi-segment hole (1-3), and one end of the clamping rod (6-2) is inserted into the ferrule (6-1) and selectively clamped inside the ferrule (6-1), one end of the elastic member (6-3) is connected to the ferrule (6-1), and the other end is connected to the fifth circle on the plane formed between the hole (1-3-5) and the sixth circular hole (1-3-6).
The nut bearing seat according to claim 6, wherein the ferrule (6-1) comprises: a ferrule body (6-1-1), a plurality of spheres (6-1-2), A plurality of the spheres (6-1-2) are evenly arranged on the outer peripheral wall of the ferrule body (6-1-1), and the ferrule body (6-1-1) is close to the intermediate through pipe (3) A clamping table (6-1-1-1) is provided on the outer peripheral wall of one end of the clamping table (6-1-1-1), and the clamping sleeve body (6-1-1) where the clamping table (6-1-1-1) is located At least one opening parallel to the axis of the ferrule body (6-1-1) is provided on the side wall of one end of the ferrule, and one end of the ferrule body (6-1-1) can pass through the second round hole (1-3-1), the tapered hole (1-3-2), the third round hole (1-3-3), and the fourth round hole (1-3- 4), the clamping table (6-1-1-1) is slidably arranged in the middle position of the fourth round hole (1-3-4), and the clamping table (6-1-1-1) ) is larger than the diameter of the third circular hole (1-3-3), and the outer diameter of the clamping table (6-1-1-1) is larger than that of the fifth circular hole (1-3-5 )diameter of.
The nut bearing seat according to claim 7, characterized in that a seventh circle is provided at one end of the ferrule body (6-1-1) away from the ferrule (6-1-1-1) A hole (6-1-1-2), an eighth round hole (6 -1-1-3), the diameter of the eighth circular hole (6-1-1-3) is larger than the diameter of the seventh circular hole (6-1-1-2), and the elastic member ( One end of 6-3) is connected to the plane formed between the eighth round hole (6-1-1-3) and the seventh round hole (6-1-1-2); the seventh round hole (6-1-1-2) A plurality of sphere mounting holes (6-1-1-4) corresponding to the sphere (6-1-2) are evenly distributed on the inner peripheral wall of the circular hole (6-1-1-2). 6-1-2) is movably arranged in the sphere mounting hole (6-1-1-4), and the sphere (6-1-2) extends from the seventh round hole (6-1-1- 2) The inner peripheral wall is protruding; the clamping rod (6-2) passes through the seventh round hole (6-1-1-2) and the eighth round hole (6-1-1- 3), the tapered hole (1-3-2) pushes the sphere (6-1-2), and the inner side of the sphere (6-1-2) is connected to the clamping rod (6-2) Abutting, the outer side abuts the inner wall of the tapered hole (1-3-2).
The nut bearing seat according to claim 6, characterized in that, the end surface of the clamping rod (6-2) close to one end of the intermediate through pipe (3) is an inclined surface.
A nut bearing seat according to claim 1, characterized in that, the inner diameter of the bearing seat (1) is manufactured according to the strength of the shaft, and the method for determining the strength of the shaft (4) is as follows:

Step A1: Calculate the diameter D of the shaft (4):

Among them, P 1 is the bending moment of the calculated section of the shaft (4), P 2 is the torque of the calculated section of the shaft (4), and α is the cyclic change of the bending stress and torsional stress of the shaft (4). parameter, β is the surface quality coefficient of the shaft (4), σ -1 is the bending endurance strength limit of the shaft (4) under symmetrical cyclic loading, [ε] is the allowable safety of the enduring strength of the shaft (4) coefficient;

Step A2: Determine the strength of the shaft (4) based on its diameter:

Wherein, W 1 is the strength of the shaft (4) calculated based on the third strength theory, W 2 is the strength of the shaft (4) calculated based on the fourth strength theory, and P 1w is the danger of the shaft (4) during operation Bending moment on the surface, P 2w is the torque on the dangerous surface when the shaft (4) is working, F is the bending shear stress on the dangerous surface when the shaft (4) is working, γ is the bending section coefficient, γ= πD 3 /32, π is a constant;

Step A3: Both W 1 and W 2 must satisfy W 1 ≤[σ], W 2 ≤[σ], where [σ] is the allowable stress of the shaft (4) material, representing the If the diameter meets the strength requirements during operation, the inner diameter of the bearing seat (1) can be determined according to the diameter of the shaft (4).