Vertical rotary shaft bearing arrangement

Abstract

The vertical rotating shaft bearing arrangement structure comprises a vertical rotating shaft and a box body sleeved on the lower end of the vertical rotating shaft; a first aligning roller bearing, a second aligning roller bearing and a four-point contact ball bearing are sequentially arranged between the vertical rotating shaft and the box body from top to bottom; the inner ring of the first aligning roller bearing is fixedly installed on the vertical rotating shaft, and the outer ring of the first aligning roller bearing is gap-fitted with the box body; the second aligning roller bearing is located above the four-point contact ball bearing, and a shaft sleeve is arranged between the second aligning roller bearing and the four-point contact ball bearing; the inner ring of the second aligning roller bearing is fixedly installed on the shaft shoulder of the vertical rotating shaft, and the outer ring of the second aligning roller bearing is gap-fitted with the box body; the four-point contact ball bearing is embedded in the stepped hole at the lower end of the box body through a pressing cover, the inner ring of the four-point contact ball bearing is gap-fitted with the vertical rotating shaft, and the outer ring of the four-point contact ball bearing is gap-fitted with the box body, and the four-point contact ball bearing has good bearing performance, long service life and high reliability.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more particularly to the configuration structure of vertical rotating shaft bearings. Background Technology

[0002] The vertical rotating shaft on a certain type of aircraft is assembled in the housing via bearings. The existing support method for the vertical rotating shaft has the problems of low load-bearing capacity and short service life. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a vertical rotating shaft bearing configuration structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A vertical rotating shaft bearing configuration structure includes a vertical rotating shaft and a housing fitted onto the lower end of the vertical rotating shaft;

[0006] A first support point is provided at the upper port of the housing, and a second support point is provided at the lower port of the housing. A first self-aligning roller bearing is provided at the first support point. The inner ring of the first self-aligning roller bearing is fixedly installed on the vertical rotating shaft, and the outer ring of the first self-aligning roller bearing is clearance-fitted with the housing.

[0007] A second self-aligning roller bearing and a four-point contact ball bearing are provided at the second support point, wherein the second self-aligning roller bearing is located above the four-point contact ball bearing, and a bushing is provided between the second self-aligning roller bearing and the four-point contact ball bearing;

[0008] The inner ring of the second self-aligning roller bearing is fixedly installed on the shoulder of the vertical rotating shaft, and the outer ring of the second self-aligning roller bearing is clearance-fitted with the housing.

[0009] The four-point contact ball bearing is fitted into the stepped hole at the lower end of the housing through a pressure cap. The inner ring of the four-point contact ball bearing is clearance-fitted with the vertical rotating shaft, and the outer ring of the four-point contact ball bearing is clearance-fitted with the housing.

[0010] Furthermore, a bearing housing is provided between the outer ring of the first self-aligning roller bearing and the housing, and the bearing housing is fixedly installed in the housing. The outer ring of the first self-aligning roller bearing and the bearing housing are clearance-fitted. A flange is provided at the outer end of the outer ring of the first self-aligning roller bearing, and a first gap is reserved between the flange and the upper end face of the bearing housing.

[0011] Furthermore, a bearing sleeve is provided between the outer ring of the first self-aligning roller bearing and the bearing housing, and the bearing sleeve is fixedly installed in the bearing housing, with the outer ring of the first self-aligning roller bearing and the bearing sleeve having a clearance fit.

[0012] Furthermore, the outer end face of the inner ring of the first self-aligning roller bearing is provided with an annular flange, which is fixed to the boss on the vertical rotating shaft by a retaining ring. The retaining ring has a retaining groove on its inner wall, and the retaining ring engages with the annular flange and the boss.

[0013] Furthermore, each end of the first self-aligning roller bearing is provided with a first sealing ring, and each first sealing ring is fixed by a first spring retaining ring. The sealing surface of the inner ring of the first self-aligning roller bearing that contacts the first sealing ring is a concave arc-shaped surface.

[0014] Furthermore, a second sealing ring is provided at one end of the second self-aligning roller bearing near the first self-aligning roller bearing. The second sealing ring is fixed by a second spring retaining ring, and the sealing surface of the inner ring of the second self-aligning roller bearing that contacts the second sealing ring is a concave arc-shaped surface.

[0015] Furthermore, the inner diameter of the inner ring of the second self-aligning roller bearing is provided with rounded chamfers at both ends.

[0016] Furthermore, a third sealing ring is provided at the end of the four-point contact ball bearing away from the second self-aligning roller bearing, and the third sealing ring is sealed between the inner ring and the outer ring of the four-point contact ball bearing by a third spring retainer ring.

[0017] Furthermore, the four-point contact ball bearing includes a four-point contact ball bearing inner ring, a four-point contact ball bearing outer ring, a third cage, and a plurality of spherical rolling elements. The plurality of rolling elements are assembled between the four-point contact ball bearing outer ring and the four-point contact ball bearing inner ring through the third cage. The rolling elements make contact with the raceways on the four-point contact ball bearing outer ring and the raceways on the four-point contact ball bearing inner ring at two points, respectively. The third cage is an externally guided type. The four-point contact ball bearing inner ring includes a first half-inner ring and a second half-inner ring. The width of the first half-inner ring is greater than the width of the second half-inner ring. The first half-inner ring and the second half-inner ring are locked and fixed by locking rings provided on the inner circumferential surfaces of the first half-inner ring and the second half-inner ring.

[0018] Furthermore, a support is provided on the outer wall of the box.

[0019] The advantages of this invention compared to the prior art are:

[0020] The vertical rotating shaft bearing configuration structure provided by this invention includes a vertical rotating shaft and a housing fitted onto the lower end of the vertical rotating shaft. From top to bottom, a first self-aligning roller bearing, a second self-aligning roller bearing, and a four-point contact ball bearing are sequentially arranged between the vertical rotating shaft and the housing. The inner ring of the first self-aligning roller bearing is fixedly mounted on the vertical rotating shaft, and the outer ring of the first self-aligning roller bearing has a clearance fit with the housing. The second self-aligning roller bearing is located above the four-point contact ball bearing, and a bushing is provided between the second self-aligning roller bearing and the four-point contact ball bearing. The inner ring of the second self-aligning roller bearing is fixedly mounted on the shoulder of the vertical rotating shaft, and the outer ring of the second self-aligning roller bearing has a clearance fit with the housing. The four-point contact ball bearing is fitted into a stepped hole at the lower end of the housing via a pressure cap. The inner ring of the four-point contact ball bearing has a clearance fit with the vertical rotating shaft, and the outer ring of the four-point contact ball bearing has a clearance fit with the housing. This configuration offers good load-bearing capacity, long service life, and high reliability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the vertical rotating shaft and the housing in an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the first self-aligning roller bearing according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the first bearing roller and bearing housing according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the second self-aligning roller bearing according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a four-point contact ball bearing according to an embodiment of the present invention.

[0027] In the diagram: 10. Vertical rotating shaft; 11. Boss; 13. Bushing; 14. Gland; 15. Bearing housing; 16. Bearing sleeve; 17. Snap ring; 20. Housing; 21. First support point; 22. Second support point; 23. Bracket; First self-aligning roller bearing; 31. Outer ring of the first self-aligning roller bearing; 32. Inner ring of the first self-aligning roller bearing; 33. First cage; 34. Flange; 35. Annular flange; 36. First sealing ring; 37. First spring retainer ring; Second self-aligning roller. Bearings, 41. Second self-aligning roller bearing outer ring, 42. Second self-aligning roller bearing inner ring, 43. Second cage, 44. Second seal ring, 45. Second spring retainer ring, 50. Four-point contact ball bearing, 51. Four-point contact ball bearing outer ring, 52. Four-point contact ball bearing inner ring, 52a. First half inner ring, 52b. Second half inner ring, 53. Third cage, 54. Spherical rolling elements, 55. Locking ring, 56. Third seal ring, 57. Third spring retainer ring, 58. Bolt. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Example 1

[0030] like Figure 1-6 As shown, where Figure 2 The arrows in the diagram indicate the force distribution on the vertical rotating shaft 10 during operation. The vertical rotating shaft bearing configuration, used in aircraft, includes the vertical rotating shaft 10, a housing 20, a first self-aligning roller bearing 30, a second self-aligning roller bearing 40, a four-point contact ball bearing 50, a bushing 13, and a pressure cap 14. The housing 20 is fitted onto the lower end of the vertical rotating shaft 10. A bracket 23 is provided on the outer wall of the housing 20 to fix the housing 20. A first support point 21 is provided at the upper end of the housing 20, and a second support point 22 is provided at the lower end. The first self-aligning roller bearing 30 is located at the first support point 21. The inner ring 32 of the first self-aligning roller bearing is fixedly mounted on the vertical rotating shaft 10, and the outer ring 31 of the first self-aligning roller bearing has a clearance fit with the housing 20. A second self-aligning roller bearing 40 and a four-point contact ball bearing 50 are installed at the second support point 22. The second self-aligning roller bearing 40 is located above the four-point contact ball bearing 50. The inner ring 42 of the second self-aligning roller bearing is fixedly installed on the shoulder of the vertical rotating shaft 10, and the outer ring 41 of the second self-aligning roller bearing is clearance-fitted with the housing 20. The four-point contact ball bearing 50 is fitted into the stepped hole at the lower end of the housing 20 through the pressure cap 14. The inner ring 52 of the four-point contact ball bearing is clearance-fitted with the vertical rotating shaft 10, and the outer ring 51 of the four-point contact ball bearing is clearance-fitted with the housing 20.

[0031] The pressure cap 14 is fixed to the vertical rotating shaft 10 by bolts 58. The pressure cap 14 is provided with a through hole, and the lower end face of the vertical rotating shaft is provided with a threaded hole. During installation, the bolts 58 pass through the through hole on the pressure cap 14 and are threaded into the threaded hole. In this embodiment, the outer diameter of the pressure cap 14 is smaller than the outer diameter of the bearing outer ring 51.

[0032] It should be noted that the gap between the inner ring 52 of the four-point contact bearing and the vertical rotating shaft 10 in this embodiment is a small gap, which only needs to allow the inner ring 52 of the four-point contact bearing to slide relative to the vertical rotating shaft 10.

[0033] A bushing 13 is provided between the second self-aligning roller bearing 40 and the four-point contact ball bearing 50. The two end faces of the bushing 13 are respectively adapted to the end faces of the inner ring 42 of the second self-aligning roller bearing and the inner ring 52 of the four-point contact ball bearing. It should be noted that the bushing 13 has the functions of limiting and transmitting force. In use, it can transmit the downward axial force applied to the inner ring 42 of the second self-aligning roller bearing by the shoulder of the vertical rotating shaft 10 to the inner ring 52 of the four-point contact ball bearing.

[0034] In use, the radial load on the vertical rotating shaft 10 is borne by two self-aligning roller bearings (first self-aligning roller bearing 30 and second self-aligning roller bearing 40), which are transmitted to the housing 20 via the inner ring, rollers, and outer ring of the two self-aligning roller bearings. The outer diameter of the outer ring of the two self-aligning roller bearings is clearance-fitted with the inner cavity of the housing 20, allowing axial floating between the two self-aligning roller bearings and the housing 20. Therefore, the two self-aligning roller bearings essentially do not bear any axial force. The axial force is borne by the four-point contact ball bearing 50 at the bottom, which is transmitted to the housing 20 via the inner ring 52, steel balls, and outer ring of the four-point contact ball bearing. This results in high load-bearing capacity, extended service life, and improved reliability.

[0035] In this embodiment, the first self-aligning roller bearing 30 is specifically an asymmetrical double-sided self-aligning roller bearing with sealing rings. The first self-aligning roller bearing 30 has two rows of drum-shaped rollers, which are assembled between the outer ring 31 and the inner ring 32 of the first self-aligning roller bearing via a first cage 33. Both the raceway of the outer ring 31 and the raceway of the inner ring 32 are spherical, and the drum-shaped rollers are in line contact with the inner and outer ring raceways. A radial oil port penetrating the outer ring 31 is provided between the two rows of raceways on the outer ring 31 of the first self-aligning roller bearing.

[0036] In this embodiment, a bearing seat 15 is provided between the outer ring 31 of the first self-aligning roller bearing and the housing 20. The bearing seat 15 is fixedly installed inside the housing 20, and the outer ring of the first self-aligning roller bearing 30 is clearance-fitted with the bearing seat 15.

[0037] To enhance protection, in this embodiment, a bearing sleeve 16 is provided between the outer ring 31 of the first self-aligning roller bearing and the bearing housing 15. The bearing sleeve 16 is fixedly installed inside the bearing housing 15, and the outer ring of the first self-aligning roller bearing 30 is clearance-fitted with the bearing sleeve 16. It should be noted that the clearance between the outer ring 31 of the first self-aligning roller bearing and the bushing 13 in this embodiment is a small clearance, which only needs to allow the outer ring 31 of the first self-aligning roller bearing to slide relative to the bushing 13.

[0038] In this embodiment, a flange 34 is provided at the outer end of the outer ring 31 of the first self-aligning roller bearing. The flange 34 is used to limit the downward movement of the first self-aligning roller bearing 30. The outer end face of the bearing sleeve 16 is provided with an outer edge that is adapted to the flange 34. It should be noted that the end of the outer ring 31 of the first self-aligning roller bearing away from the second self-aligning roller is the outer end of the outer ring 31 of the first self-aligning roller bearing.

[0039] During installation, a first gap is reserved between the flange 34 and the upper end face of the bearing housing 15. Preferably, the first gap is no greater than 2mm. In this embodiment, the axial gap between the flange 34 and the upper end face of the bearing housing 15 is 2mm. It should be noted that the axial gap between the flange 34 and the upper end face of the bearing housing 15 is set to ensure that the first self-aligning roller bearing 30 has axial sliding space.

[0040] An annular flange 35 is provided at the outer end of the inner ring 32 of the first self-aligning roller bearing. The annular flange 35 is fixed to the boss 11 on the vertical rotating shaft 10 by a retaining ring 17. A retaining groove is provided on the inner wall of the retaining ring 17, and the retaining groove of the retaining ring 17 engages with the annular flange 35 and the boss 11. It should be noted that the end of the inner ring 32 of the first self-aligning roller bearing away from the second self-aligning roller is the outer end of the inner ring 32 of the first self-aligning roller bearing. In this embodiment, the outer end face of the annular flange 35 is higher than the outer end face of the flange 34. Specifically, the inner ring 32 of the first self-aligning roller bearing near the flange 34 has an axially extending extension section, and the annular flange 35 is disposed on the extension section. It should be noted that the retaining ring 17 ensures a reliable axial connection between the first self-aligning roller bearing 30 and the vertical rotating shaft 10.

[0041] Both ends of the first self-aligning roller bearing 30 are provided with a first sealing ring 36, and each first sealing ring 36 is fixed by a first spring retaining ring 37. Specifically, the inner circumferential surfaces at both ends of the outer ring 31 of the first self-aligning roller bearing are provided with a first sealing groove that matches the first sealing ring 36 and a first mounting groove that matches the first spring retaining ring 37. The first sealing groove and the first mounting groove are arranged adjacent to each other, and the inner diameter of the first sealing groove is smaller than the inner diameter of the first mounting groove. It should be noted that the first sealing ring in this embodiment is a pressure plate type combined seal.

[0042] The sealing surface of the inner ring 32 of the first self-aligning roller bearing, which contacts the first sealing ring 36, is a concave arc-shaped surface to ensure a good sealing effect during the self-aligning process of the first self-aligning roller bearing 30. Specifically, a first intermediate flange is provided between the two rows of raceways on the inner ring 32 of the first self-aligning roller bearing, and a first outer flange is provided at each end of the inner ring 32 of the first self-aligning roller bearing. The outer circumferential surface of the first outer flange is provided with a concave arc-shaped surface that abuts against the first sealing ring 36. During installation, the first sealing ring 36 is clearance-fitted with the first sealing groove, and the first sealing ring 36 is interference-fitted with the concave arc-shaped surface on the first outer flange. The first spring retainer ring 37 is interference-fitted with the first mounting groove. It should be noted that the first spring retainer ring 37 ensures that the first sealing ring 36 does not move, achieving a good sealing effect.

[0043] In this embodiment, the second self-aligning roller bearing 40 is an asymmetrical single-sided self-aligning roller bearing with a sealing ring. Specifically, the second self-aligning roller bearing 40 has two rows of drum-shaped rollers, which are assembled between the outer ring 41 and the inner ring 42 of the second self-aligning roller bearing via a second cage 43. The raceways of both the outer ring 41 and the inner ring 42 of the second self-aligning roller bearing are spherical, and the drum-shaped rollers are in line contact with the inner and outer ring raceways. A radial oil port penetrating the outer ring 41 is provided between the two rows of raceways on the outer ring 41 of the second self-aligning roller bearing.

[0044] A second sealing ring 44 is provided at one end of the second self-aligning roller bearing 40 near the first self-aligning roller bearing 30. The second sealing ring 44 is fixed by a second spring retaining ring 45. Specifically, a second sealing groove adapted to the second sealing ring 44 and a second mounting groove adapted to the second spring retaining ring 45 are provided on the inner circumferential surface of the outer ring 41 of the second self-aligning roller bearing near the outer ring 31 of the first self-aligning roller bearing. The second sealing groove and the second mounting groove are adjacent to each other, and the inner diameter of the second sealing groove is smaller than the inner diameter of the second mounting groove. It should be noted that the asymmetrical arrangement of the sealing ring on one side of the second self-aligning roller bearing 40 ensures the sealing effect while also meeting the requirements of lightweight design.

[0045] The sealing surface of the inner ring 42 of the second self-aligning roller bearing, which contacts the second sealing ring 44, is a concave arc-shaped surface to ensure a good sealing effect during the self-aligning process of the second self-aligning roller bearing 40. Specifically, a second middle flange is provided between the two rows of raceways on the inner ring 42 of the second self-aligning roller bearing, and a second outer flange is provided at each end of the inner ring 42 of the second self-aligning roller bearing. A concave arc-shaped surface that abuts against the second sealing ring 44 is provided on the outer circumference of the second outer flange on one side. During installation, the second sealing ring 44 is clearance-fitted with the second sealing groove, and the second sealing ring 44 is interference-fitted with the concave arc-shaped surface on the second outer flange. The second spring retainer ring 45 is interference-fitted with the second mounting groove. It should be noted that the second spring retainer ring 45 ensures that the second sealing ring 44 does not move, achieving a good sealing effect.

[0046] In this embodiment, the inner diameter of the inner ring 42 of the second self-aligning roller bearing is provided with rounded chamfers at both ends, wherein the rounded chamfer on the side closer to the second sealing ring 44 is larger than the rounded chamfer on the side farther from the second sealing ring 44. It should be noted that the rounded chamfers facilitate the installation of the second self-aligning roller bearing 40 on the vertical rotating shaft 10.

[0047] It should be noted that the gap between the outer ring of the second self-aligning roller and the housing 20 in this embodiment is a small gap, which only needs to satisfy the requirement that the outer ring 41 of the second self-aligning roller bearing can slide relative to the housing 20.

[0048] In this embodiment, the four-point contact ball bearing 50 is an asymmetrical, single-sided four-point contact ball bearing with a sealing ring. Specifically, the four-point contact ball bearing 50 is a non-separable bearing, including an inner ring 52, an outer ring 51, a third cage 53, and multiple spherical rolling elements 54. The multiple spherical rolling elements 54 are assembled between the outer ring 51 and the inner ring 52 via the third cage 53. Each spherical rolling element 54 makes contact with both the raceways on the outer ring 51 and the inner ring 52. In this embodiment, the spherical rolling elements 54 are steel balls. Preferably, both the outer ring 51 and the inner ring 52 of the four-point contact ball bearing are provided with peach-shaped raceways, which can withstand radial loads and bidirectional axial loads. The third cage 53 is an externally guided type. It should be noted that the externally guided third cage 53 in this embodiment can improve the high-speed performance of the four-point contact ball bearing 50 and reduce the weight of the bearing.

[0049] The inner ring 52 of the four-point contact ball bearing includes a first half-inner ring 52a and a second half-inner ring 52b. The width of the first half-inner ring 52a is greater than the width of the second half-inner ring 52b. The first half-inner ring 52a and the second half-inner ring 52b are locked and fixed by locking rings 55 set on the inner circumferential surfaces of the first half-inner ring 52a and the second half-inner ring 52b. Specifically, locking grooves adapted to the locking rings 55 are respectively provided on the inner circumferential surfaces of the first half-inner ring 52a and the second half-inner ring 52b near the mating surface. The locking rings 55 (with a U-shaped cross-section) are engaged in the locking grooves. It should be noted that the locking grooves facilitate the installation of the four-point contact ball bearing 50.

[0050] A third sealing ring 56 is provided at the end of the four-point contact ball bearing 50 furthest from the second self-aligning roller bearing 40. The third sealing ring 56 is sealed and installed between the first half-inner ring 52a and the outer ring 51 of the four-point contact ball bearing via a third spring retainer ring 57. Specifically, a third sealing groove is provided on the outer circumferential surface of the first half-inner ring 52a, and a fourth sealing groove and a third mounting groove are provided on the inner circumferential surface of the outer ring 51 of the four-point contact ball bearing. The third sealing ring 56 is installed in the third sealing groove and the fourth sealing groove. During installation, the third sealing ring 56 is in an over-fitting fit with the third sealing ring 56 groove on the first half-inner ring 52a to improve the bearing sealing performance. The third spring retainer ring 57 is in an over-fitting fit with the third mounting groove to ensure that the third sealing ring 56 does not move, achieving a good sealing effect. It should be noted that in this embodiment, the four-point contact ball bearing 50 is provided with a third sealing ring 56 on one side, which satisfies the requirements of lightweight while ensuring the sealing effect of the four-point contact ball bearing 50.

[0051] The beneficial effects of this embodiment compared to the prior art are:

[0052] In this embodiment, both the first self-aligning roller bearing 30 and the second self-aligning roller bearing 40 are non-separable bearings with two rows of drum-shaped rollers inside. Both the inner and outer rings of the bearing have spherical raceways, and the rollers and raceways are in line contact. They can withstand large radial and certain axial loads. At the same time, the inner raceway of the bearing is spherical, so its self-aligning performance is good, allowing the vertical rotating shaft 10 to have a certain degree of deflection and compensating for coaxiality errors.

[0053] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "top," "middle," "one end," "the other end," "both ends," "upper," "lower," "one side," "the other side," "inner," "outer," "front," "center," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0054] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] In the description of this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] Although embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical rotary shaft bearing arrangement, characterized by: The vertical rotating shaft and the box body sleeved on the lower end of the vertical rotating shaft are included; the first support point is arranged at the upper end of the box body, and the second support point is arranged at the lower end of the box body; the first aligning roller bearing is arranged at the first support point, the inner ring of the first aligning roller bearing is fixedly installed on the vertical rotating shaft, and the outer ring of the first aligning roller bearing is in clearance fit with the box body; the second aligning roller bearing and the four-point contact ball bearing are arranged at the second support point, the second aligning roller bearing is located above the four-point contact ball bearing, and the shaft sleeve is arranged between the second aligning roller bearing and the four-point contact ball bearing; the inner ring of the second aligning roller bearing is fixedly installed on the shaft shoulder of the vertical rotating shaft, and the outer ring of the second aligning roller bearing is in clearance fit with the box body; the four-point contact ball bearing is embedded in the stepped hole at the lower end of the box body through the gland, the inner ring of the four-point contact ball bearing is in clearance fit with the vertical rotating shaft, and the outer ring of the four-point contact ball bearing is in clearance fit with the box body. The bearing seat is arranged between the outer ring of the first aligning roller bearing and the box body, the bearing seat is fixedly installed in the box body, and the outer ring of the first aligning roller bearing is in clearance fit with the bearing seat; the flange is arranged at the outer end of the outer ring of the first aligning roller bearing, and the first gap is reserved between the flange and the upper end face of the bearing seat; The bearing sleeve is arranged between the outer ring of the first aligning roller bearing and the bearing seat, the bearing sleeve is fixedly installed in the bearing seat, and the outer ring of the first aligning roller bearing is in clearance fit with the bearing sleeve; The first sealing ring is arranged at each end of the first aligning roller bearing, each first sealing ring is fixed through the first spring retainer, and the sealing surface for contacting the first sealing ring is a concave arc surface. The second sealing ring is arranged at one end of the second aligning roller bearing close to the first aligning roller bearing, the second sealing ring is fixed through the second spring retainer, and the sealing surface for contacting the second sealing ring is a concave arc surface. The third sealing ring is arranged at one end of the four-point contact ball bearing away from the second aligning roller bearing, and the third sealing ring is fixedly installed between the inner ring of the four-point contact ball bearing and the outer ring of the four-point contact ball bearing through the third spring retainer.

2. The vertical rotary shaft bearing arrangement according to claim 1, characterized in that: The annular flange is arranged on the outer end face of the inner ring of the first aligning roller bearing, the annular flange is fixed on the boss of the vertical rotating shaft through the snap ring, the snap ring is provided with a clamping groove on the inner wall, and the clamping groove of the snap ring is clamped on the annular flange and the boss.

3. The vertical rotary shaft bearing arrangement according to claim 1, characterized in that: The circular arc chamfer is arranged at both ends of the inner diameter of the inner ring of the second aligning roller bearing.

4. The vertical rotary shaft bearing arrangement according to claim 1, characterized in that: The four-point contact ball bearing comprises a four-point contact ball bearing inner ring, a four-point contact ball bearing outer ring, a third retainer and a plurality of spherical rolling bodies, the rolling bodies are assembled between the four-point contact ball bearing outer ring and the four-point contact ball bearing inner ring through the third retainer, the rolling bodies are respectively in two-point contact with raceways on the four-point contact ball bearing outer ring and raceways on the four-point contact ball bearing inner ring, and the third retainer is of an outer guide type; the four-point contact ball bearing inner ring comprises a first half inner ring and a second half inner ring, the width of the first half inner ring is greater than the width of the second half inner ring, and the first half inner ring and the second half inner ring are fixedly locked through locking rings arranged on inner circumferential surfaces of the first half inner ring and the second half inner ring.

5. The vertical rotary shaft bearing arrangement according to any one of claims 1 to 4, characterized in that: The box outer wall is provided with a support.

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