A self-lubricating structure for high-speed motor refrigerant sliding bearing

Abstract

The invention relates to the technical field of sliding bearing lubrication, and discloses a self-lubricating structure of a high-speed motor refrigerant sliding bearing, comprising a lower bearing seat, wherein the top bolt of the lower bearing seat is connected to an upper bearing seat, and a transmission shaft is commonly arranged in the middle between the lower bearing seat and the upper bearing seat; the structure is provided with a conveying groove on the inner side of an upper bearing shell and a lower bearing shell, and during the high-speed rotation of the transmission shaft, the lubricating oil inside the conveying groove is conveyed to the inside of a conveying cavity through a conveying hole, and is further conveyed to the inside of an infusion pipe, and is sprayed out from the position of the infusion hole, and is then conveyed to the inside of a reflux mounting groove; the lubricating oil conveyed to the inside of the reflux mounting groove has power, and thus generates pressure to act on an upper movable retaining ring or a lower movable retaining ring, and then generates an axial force on a limiting convex ring, so as to offset the axial power of the transmission shaft and improve the service life of the sliding bearing.

Description

Technical Field

[0001] The invention relates to the technical field of sliding bearing lubrication, and more specifically, to a self-lubricating structure of a high-speed motor refrigerant sliding bearing. Background Art

[0002] In the design and application process of high-speed motor bearings, sliding bearings, as one of the important components of high-speed motors, undertake the functions of support and transmission. Refrigerant-lubricated bearings use refrigerant as the lubricating medium. Due to the low viscosity of the refrigerant, the bearing is suitable for high-speed ranges. The refrigerant plays a lubricating role, reduces friction and wear on the working surface, improves efficiency and service life, and also plays a role in cooling and vibration absorption.

[0003] The existing sliding bearings mainly rotate through the rotational driving force generated by the lubricating oil during the rotation of the transmission shaft, and then the lubricating oil generates a radial bearing capacity, which can bear the radial load of the transmission shaft. The displacement direction of the lubricating oil is to follow the centrifugal state generated by the transmission shaft, and the force can only be diverged to the surroundings of the transmission shaft. In the sliding bearing, the force for the axial displacement of the transmission shaft is usually rigidly resisted by the thrust ring. The force applied to the thrust ring is along the axial direction, but there is a lack of reverse force, which can cause the thrust ring to block the transmission shaft. In particular, it is impossible to generate an axial driving force through the lubricating oil, and thus the structural optimization of the sliding bearing is required. Summary of the invention

[0004] The invention provides a self-lubricating structure of a high-speed motor refrigerant sliding bearing, which solves the technical problem in the related art that the sliding bearing lacks the reaction force provided by lubricating oil to the axial displacement of the transmission shaft during lubrication.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A self-lubricating structure of a high-speed motor refrigerant sliding bearing, comprising a lower bearing seat, the top of the lower bearing seat is bolted to an upper bearing seat, and a transmission shaft is commonly arranged in the middle between the lower bearing seat and the upper bearing seat;

[0007] An upper bearing shell that matches the transmission shaft is disposed on the inner side of the upper bearing seat, and a lower bearing shell that matches the transmission shaft is disposed on the inner side of the lower bearing seat. The upper bearing shell and the lower bearing shell are symmetrical to each other and are both semicircular ring structures.

[0008] The inner sides of the upper bearing shell and the lower bearing shell are jointly provided with a self-lubricating mechanism adapted to the transmission shaft, the top of the upper bearing seat is provided with an oil inlet port, the top of the upper bearing shell is provided with an oil inlet hole interconnected with the oil inlet port, and lubricating oil is added to the oil cavity formed by the lower bearing seat, the upper bearing seat and the transmission shaft through the oil inlet port and the oil inlet hole;

[0009] The transmission shaft is symmetrically provided with axial support mechanisms at positions inside the upper bearing and the lower bearing, and the self-lubricating mechanism drives the lubricating oil to flow to generate power and generate force on the axial support mechanism;

[0010] Sealing mechanisms are symmetrically arranged at positions near the output end on the inner sides of the upper bearing shell and the lower bearing shell, and the sealing mechanisms are communicated with the self-lubricating mechanism.

[0011] As a further optimization scheme of the present invention, the self-lubricating mechanism includes a conveying groove symmetrically arranged in the middle part of the inner side of the upper bearing shell and the lower bearing shell, and a conveying cavity is arranged inside the upper bearing shell and the lower bearing shell near the conveying groove. The inner side of the conveying groove is evenly distributed with a plurality of conveying holes connected with the conveying cavity, and the outer side of the upper bearing shell and the lower bearing shell is partially provided with a plurality of mounting strips that engage with the inner side of the lower bearing seat or the upper bearing seat.

[0012] As a further optimization scheme of the present invention, a reflux mounting groove is symmetrically arranged in the middle of the inner side of the upper bearing and the lower bearing near the conveying groove, and a plurality of groups of infusion holes are evenly distributed on the inner side of the reflux mounting groove. The other end of the infusion hole passes through the interior of the upper bearing or the lower bearing and is connected with the interior of the conveying hole. An infusion pipe is commonly arranged between the infusion hole and the conveying hole. The aperture of the conveying hole is larger than the aperture of the infusion hole, and the flow rate of the lubricating oil entering through the conveying hole is greater than the flow rate of the lubricating oil entering through the infusion hole.

[0013] As a further optimization scheme of the present invention, a support groove connected to the return flow installation groove is provided at the inner side of the upper bearing or the lower bearing between the return flow installation groove and the conveying groove, and the maximum axial distance between the two groups of the support grooves is D 2 A lower movable retaining ring is provided inside the reflux mounting groove on the inner side of the lower bearing shell, and an upper movable retaining ring is provided inside the reflux mounting groove on the inner side of the upper bearing shell. The outer sides of the upper movable retaining ring and the lower movable retaining ring are evenly distributed with a plurality of groups of limiting protrusions that engage with the reflux mounting groove.

[0014] As a further optimization solution of the present invention, the axial support mechanism includes two sets of limiting convex rings arranged on the outside of the transmission shaft, and the maximum axial distance between the two sets of limiting convex rings is D 1 , where D 1 Greater than D 2 There are several groups of guide push plates evenly distributed on the side where the two groups of limiting convex rings are close to each other. The guide push plates are wedge-shaped structures. The guide push plates are used to follow the rotation of the limiting convex rings and then promote the rotational displacement of the lubricating oil. The guide push plates located on the outsides of the two groups of limiting convex rings are symmetrically distributed with each other, and there are several groups of liquid guide holes penetrating the limiting convex rings evenly distributed on both sides of the limiting convex rings.

[0015] As a further optimization scheme of the present invention, the connecting ends of the upper movable baffle ring and the lower movable baffle ring are respectively provided with connecting protrusions and connecting grooves, the connecting protrusions and connecting grooves are engaged with each other, the outer diameter of the support groove is smaller than the outer diameter of the reflux mounting groove, the edge positions of the two groups of the limiting protrusions extend to the interior of the reflux mounting groove, and the upper movable baffle ring and the lower movable baffle ring are close to the limiting protrusion on one side and fit with the limiting protrusion.

[0016] As a further optimization scheme of the present invention, the width of the upper movable baffle ring and the lower movable baffle ring is smaller than the longitudinal width of the reflux mounting groove, the outer diameters of the upper movable baffle ring and the lower movable baffle ring are equal to the outer diameter of the reflux mounting groove, the infusion hole is located on the side of the upper movable baffle ring or the upper bearing away from the limiting convex ring, the side of the upper movable baffle ring and the lower movable baffle ring close to the infusion hole are both provided with a sealing ring embedded in the reflux mounting groove, a connecting block is provided between the sealing ring and the upper movable baffle ring or the lower movable baffle ring, a flow gap is formed between the sealing ring and the upper movable baffle ring or the lower movable baffle ring through the connecting block, and the flow gap corresponds to the infusion hole, and one side of the sealing ring is in contact with the inner wall of the reflux mounting groove.

[0017] As a further optimization scheme of the present invention, the sealing mechanism includes sealing installation grooves arranged at both ends of the inner side of the upper bearing or the lower bearing, and the cross-section of the sealing installation groove is a stepped structure, wherein the outer diameter of the inner side of the sealing installation groove is larger than the outer diameter of the inner side thereof.

[0018] As a further optimization scheme of the present invention, an upper sealing ring is engaged inside the sealing installation groove located on the inner side of the upper bearing shell, and a lower sealing ring is engaged inside the sealing installation groove located on the inner side of the lower bearing shell. The lower sealing ring and the upper sealing ring are symmetrical structures. The lower sealing ring and the upper sealing ring have the same inner diameter and fit together with the outer side of the transmission shaft. The inner side of the transmission shaft is sealed by the lower sealing ring and the upper sealing ring.

[0019] As a further optimization scheme of the present invention, a heat dissipation groove is arranged on the inner side of the upper sealing ring and the lower sealing ring, and a plurality of heat dissipation holes are evenly distributed on the inner side of the heat dissipation groove. A limiting ring groove is arranged on the outer side of the upper sealing ring or the lower sealing ring, and the limiting ring groove and the sealing installation groove are engaged with each other.

[0020] The beneficial effect of the present invention is that: by arranging a delivery groove on the inner side of the upper bearing and the lower bearing, during the high-speed rotation of the transmission shaft, the lubricating oil inside the delivery groove is delivered to the inside of the delivery cavity through the delivery hole, and is further delivered to the inside of the infusion tube, and is sprayed out from the position of the infusion hole, and then delivered to the inside of the reflux mounting groove. The lubricating oil delivered to the inside of the reflux mounting groove has power, and then generates pressure to act on the upper movable baffle ring or the lower movable baffle ring, and then generates an axial force on the limiting convex ring to offset the axial power of the transmission shaft and increase the service life of the sliding bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural stereoscopic schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of a three-dimensional structure decomposition of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the transmission shaft in the installation state of the present invention;

[0024] Figure 4 It is an enlarged schematic diagram of the structure of the transmission shaft in the present invention;

[0025] Figure 5 yes Figure 4 A magnified schematic diagram of the structure at A

[0026] Figure 6 It is an enlarged schematic diagram of the structure of the upper movable baffle ring and the lower movable baffle ring in the present invention;

[0027] Figure 7 yes Figure 6 A schematic diagram of the structure at B;

[0028] Figure 8 yes Figure 6 A schematic diagram of the structure at position C of FIG.

[0029] Fig. 9 It is an enlarged schematic diagram of the connection structure between the upper movable baffle ring and the blocking ring in the present invention;

[0030] Fig.10 It is an enlarged schematic diagram of the structure of the upper bearing shell and the lower bearing shell in the present invention;

[0031] Fig.11 It is a schematic diagram of the internal structure of the lower bearing bush in the present invention;

[0032] Fig.12 It is a longitudinal sectional view of the lower bearing bush of the present invention;

[0033] Fig.13 is a transverse cross-sectional view of the lower bearing bush of the present invention;

[0034] Fig.14 It is a top view of the lower bearing shell of the present invention.

[0035] In the figure: 1. lower bearing seat; 2. upper bearing seat; 3. oil inlet port; 4. transmission shaft; 5. upper movable retaining ring; 6. upper bearing shell; 7. upper sealing ring; 8. lower bearing shell; 9. limiting convex ring; 10. limiting convex block; 11. lower movable retaining ring; 12. lower sealing ring; 13. connecting convex block; 14. connecting groove; 15. limiting ring groove; 16. heat dissipation groove; 17. heat dissipation hole; 18. mounting clip; 19. oil inlet hole; 20. sealing mounting groove; 21. reflux mounting groove; 22. delivery groove; 23. delivery cavity; 24. delivery hole; 25. support groove; 26. infusion hole; 27. infusion tube; 28. guide push plate; 29. ​​liquid guide hole; 30. blocking ring; 31. connecting block. DETAILED DESCRIPTION

[0036] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0037] Example 1

[0038] like Figures 1 to 14 As shown, a self-lubricating structure of a high-speed motor refrigerant sliding bearing comprises a lower bearing seat 1, the top of the lower bearing seat 1 is bolted to an upper bearing seat 2, and a transmission shaft 4 is commonly provided in the middle between the lower bearing seat 1 and the upper bearing seat 2;

[0039] An upper bearing bush 6 adapted to the transmission shaft 4 is arranged on the inner side of the upper bearing seat 2, and a lower bearing bush 8 adapted to the transmission shaft 4 is arranged on the inner side of the lower bearing seat 1. The upper bearing bush 6 and the lower bearing bush 8 are symmetrical to each other and are both semicircular ring structures.

[0040] The inner sides of the upper bearing shell 6 and the lower bearing shell 8 are jointly provided with a self-lubricating mechanism adapted to the transmission shaft 4, the top of the upper bearing seat 2 is provided with an oil inlet port 3, and the top of the upper bearing shell 6 is provided with an oil inlet hole 19 interconnected with the oil inlet port 3, and the lubricating oil is added to the oil cavity formed by the lower bearing seat 1, the upper bearing seat 2 and the transmission shaft 4 through the oil inlet port 3 and the oil inlet hole 19;

[0041] The self-lubricating mechanism includes a conveying groove 22 symmetrically arranged in the middle of the inner side of the upper bearing 6 and the lower bearing 8, a conveying cavity 23 is arranged at a position near the conveying groove 22 inside the upper bearing 6 and the lower bearing 8, and a plurality of conveying holes 24 connected to the conveying cavity 23 are evenly distributed on the inner side of the conveying groove 22, and a plurality of mounting clips 18 are partially arranged on the outer side of the upper bearing 6 and the lower bearing 8, which are engaged with the inner side of the lower bearing seat 1 or the upper bearing seat 2. A reflux installation groove 21 is symmetrically arranged in the middle of the position 22, and a plurality of groups of infusion holes 26 are evenly distributed on the inner side of the reflux installation groove 21. The other end of the infusion hole 26 passes through the interior of the upper bearing shell 6 or the lower bearing shell 8 and is connected with the interior of the delivery hole 24. A infusion pipe 27 is arranged between the infusion hole 26 and the delivery hole 24. The aperture of the delivery hole 24 is larger than that of the infusion hole 26. The flow rate of the lubricating oil entering through the delivery hole 24 is larger than the flow rate of the lubricating oil entering through the infusion hole 26.

[0042] A support groove 25 connected to the return groove 21 is provided at the inner side of the upper bearing 6 or the lower bearing 8 between the return groove 21 and the delivery groove 22. The maximum axial distance between the two groups of support grooves 25 is D 2 The lower movable retaining ring 11 is provided in engagement with the inner side of the return installation groove 21 located on the inner side of the lower bearing shell 8, and the upper movable retaining ring 5 is provided in engagement with the inner side of the return installation groove 21 located on the inner side of the upper bearing shell 6. The outer sides of the upper movable retaining ring 5 and the lower movable retaining ring 11 are uniformly provided with a plurality of groups of limiting protrusions 10 mutually engaged with the return installation groove 21;

[0043] The transmission shaft 4 is symmetrically provided with an axial support mechanism at the position inside the upper bearing 6 and the lower bearing 8. The self-lubricating mechanism drives the lubricating oil to flow to generate power and generate force on the axial support mechanism. The axial support mechanism includes two sets of limiting convex rings 9 arranged on the outside of the transmission shaft 4. The maximum axial distance between the two sets of limiting convex rings 9 is D 1 , where D 1 Greater than D 2 , a plurality of guide push plates 28 are evenly distributed on the side where the two groups of limiting convex rings 9 are close to each other, and the guide push plates 28 are wedge-shaped structures. The guide push plates 28 are used to follow the rotation of the limiting convex rings 9 and then promote the rotational displacement of the lubricating oil. The guide push plates 28 located on the outer sides of the two groups of limiting convex rings 9 are symmetrically distributed. A plurality of liquid guide holes 29 penetrating the limiting convex rings 9 are evenly distributed on both sides of the limiting convex rings 9. The connecting ends of the upper movable baffle ring 5 and the lower movable baffle ring 11 are respectively provided with connecting protrusions 13 and connecting grooves 14, and the connecting protrusions 13 and the connecting grooves 14 are engaged with each other. The outer diameter of the support groove 25 is smaller than the outer diameter of the reflux mounting groove 21. The edge positions of the two groups of limiting convex rings 9 extend to the inside of the reflux mounting groove 21. The upper movable baffle ring 5 and the lower movable baffle ring 11 are close to the limiting convex ring 9 on one side and fit with the limiting convex ring 9.

[0044] The width of the upper movable baffle ring 5 and the lower movable baffle ring 11 is smaller than the longitudinal width of the reflux mounting groove 21, and the outer diameters of the upper movable baffle ring 5 and the lower movable baffle ring 11 are equal to the outer diameter of the reflux mounting groove 21. The infusion hole 26 is located on the side of the upper movable baffle ring 5 or the upper bearing 6 away from the limiting convex ring 9. The side of the upper movable baffle ring 5 and the lower movable baffle ring 11 close to the infusion hole 26 is provided with a blocking ring 30 embedded in the reflux mounting groove 21. A connecting block 31 is provided between the blocking ring 30 and the upper movable baffle ring 5 or the lower movable baffle ring 11. A flow gap is formed between the blocking ring 30 and the upper movable baffle ring 5 or the lower movable baffle ring 11 through the connecting block 31, and the flow gap corresponds to the infusion hole 26. One side of the blocking ring 30 is in contact with the inner wall of the reflux mounting groove 21.

[0045] A sealing mechanism is symmetrically arranged at a position near the output end on the inner side of the upper bearing 6 and the lower bearing 8. The sealing mechanism is connected to the self-lubricating mechanism. The sealing mechanism includes a sealing installation groove 20 arranged at both ends of the inner side of the upper bearing 6 or the lower bearing 8. The cross section of the sealing installation groove 20 is a stepped structure, wherein the outer diameter of the inner side of the sealing installation groove 20 is larger than the outer diameter of the inner side thereof. The upper sealing ring 7 is engaged with the inner side of the sealing installation groove 20 located on the inner side of the upper bearing 6, and the lower sealing ring 7 is engaged with the inner side of the sealing installation groove 20 located on the inner side of the lower bearing 8. The sealing ring 12, the lower sealing ring 12 and the upper sealing ring 7 are of symmetrical structure. The inner diameters of the lower sealing ring 12 and the upper sealing ring 7 are the same and fit together with the outer side of the transmission shaft 4. The inner side of the transmission shaft 4 is sealed by the lower sealing ring 12 and the upper sealing ring 7. The inner sides of the upper sealing ring 7 and the lower sealing ring 12 are provided with heat dissipation grooves 16. The inner sides of the heat dissipation grooves 16 are evenly distributed with a plurality of groups of heat dissipation holes 17. The outer sides of the upper sealing ring 7 or the lower sealing ring 12 are provided with limit ring grooves 15, and the limit ring grooves 15 and the sealing mounting grooves 20 are engaged with each other.

[0046] The use process of the self-lubricating structure of the high-speed motor refrigerant sliding bearing proposed in this embodiment is as follows: during the operation of the transmission shaft 4, the operation of the transmission shaft 4 drives the lubricating oil in the cavities of the upper bearing 6 and the lower bearing 8 to rotate, thereby causing the lubricating oil to generate centrifugal force. As the transmission shaft 4 continues to accelerate, the lubricating oil is driven to move downward to the top area of ​​the lower bearing 8, so that the amount of lubricating oil between the top of the lower bearing 8 and the transmission shaft 4 continues to increase, and the lubricating oil provides radial support force to the bottom of the transmission shaft 4, so that the transmission shaft 4 can float and rotate, realizing the lubricating oil. The radial bearing effect of the transmission shaft 4 is that the rotation of the transmission shaft 4 drives the limiting convex ring 9 to follow the rotation, so that the guide push plate 28 pushes the lubricating oil between the two groups of limiting convex rings 9, and the pushing direction is along the rotation direction of the transmission shaft 4, thereby improving the rotation effect of the lubricating oil, and the lubricating oil inside the infusion hole 26 is transported to the position of the conveying groove 22 through the liquid guide hole 29, and the two groups of guide push plates 28 are symmetrical structures, so the reaction force of the lubricating oil is offset by each other, avoiding the phenomenon of axial displacement of the transmission shaft 4 caused by the guide push plate 28;

[0047] As the lubricating oil follows the rotation, part of the lubricating oil generates power through centrifugal force, and then enters the interior of the delivery cavity 23 through the delivery hole 24, and is connected with the infusion pipe 27 through the delivery cavity 23, so that the lubricating oil is further delivered to the position of the infusion hole 26 for spraying out. The aperture of the delivery hole 24 is larger than the aperture of the infusion hole 26, and the guide push plate 28 guides and pushes the lubricating oil, so that the lubricating oil forms a flow state from the delivery hole 24 to the infusion hole 26;

[0048] The ejected lubricating oil fills the interior of the reflux mounting groove 21, thereby generating a driving force on the side of the upper movable retaining ring 5 or the lower movable retaining ring 11, and the driving force of the upper movable retaining ring 5 or the lower movable retaining ring 11 acts on the limiting convex ring 9, thereby generating a reaction force on the axial direction of the transmission shaft 4, and when the transmission shaft 4 is axially displaced, the power of the axial displacement of the transmission shaft 4 can be offset;

[0049] At the same time, the maximum axial distance between the two sets of limiting convex rings 9 is D 1 Greater than the maximum longitudinal distance D between the two groups of support grooves 25 2 , so that the transmission shaft 4 has space for displacement when subjected to radial force, and forms a reaction force with the radial force exerted on the limiting convex ring 9, thereby weakening or offsetting the radial force of the transmission shaft 4;

[0050] The force generated by the lubricating oil in the reflux installation groove 21 causes the lubricating oil to return to the area of ​​the conveying groove 22 through the inner sides of the upper movable retaining ring 5 and the lower movable retaining ring 11, thereby forming a loop for the lubricating oil in the cavities of the upper bearing shell 6 and the lower bearing shell 8;

[0051] When the transmission shaft 4 is subjected to an external axial force, the axial force causes the transmission shaft 4 to generate an axial displacement on the inner side of the upper bearing 6 and the lower bearing 8. When the transmission shaft 4 is displaced, the two groups of limiting convex rings 9 are driven to displace. At this time, one group of limiting convex rings 9 generates a driving force on a group of upper movable retaining rings 5 ​​and lower movable retaining rings 11, and the upper movable retaining rings 5 ​​and lower movable retaining rings 11 are limited by the sealing ring 30 and the reflux mounting groove 21 and cannot move. The other group of upper movable retaining rings 5 ​​and lower movable retaining rings 11 are driven by the lubricating oil to approach the other group of limiting convex rings 9, thereby driving the group of sealing rings 30. Following the displacement, the block ring 30 blocks the passage of the infusion hole 26 with the displacement of the block ring 30, so that the lubricating oil cannot enter through the infusion hole 26, and thus the limiting convex ring 9 on the side cannot generate the driving force of the lubricating oil, but the passage of the infusion hole 26 close to the previous limiting convex ring 9 remains normal, and thus the lubricating oil generates the driving force on the upper movable retaining ring 5 and the lower movable retaining ring 11 on the side of the previous limiting convex ring 9, and the driving force is just opposite to the axial force on the transmission shaft 4, and thus the axial force on the transmission shaft 4 is offset or weakened, reducing the extrusion of the sliding bearing and extending its service life;

[0052] At the same time, the axial force of the lubricating oil entering the reflux mounting groove 21 generates an extrusion force on the upper sealing ring 7 and the lower sealing ring 12, so that the upper sealing ring 7 and the lower sealing ring 12 are engaged with the inner side of the sealing mounting groove 20, thereby forming a dynamic sealing state during the rotation of the transmission shaft 4, thereby improving the sealing effect of the device structure, and by providing a heat dissipation groove 16 and a heat dissipation hole 17 on the inner side of the upper sealing ring 7 or the lower sealing ring 12, the friction area is reduced, thereby improving the heat dissipation effect, and by providing a limiting ring groove 15, the engagement effect of the upper sealing ring 7 and the lower sealing ring 12 in the sealing mounting groove 20 is improved.

[0053] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. A self-lubricating structure for a high-speed motor refrigerant sliding bearing, characterized in that: It comprises a lower bearing seat (1), the top of the lower bearing seat (1) is bolted to an upper bearing seat (2), and a transmission shaft (4) is provided in the middle between the lower bearing seat (1) and the upper bearing seat (2); An upper bearing shell (6) adapted to fit the transmission shaft (4) is disposed on the inner side of the upper bearing seat (2), and a lower bearing shell (8) adapted to fit the transmission shaft (4) is disposed on the inner side of the lower bearing seat (1), wherein the upper bearing shell (6) and the lower bearing shell (8) are symmetrical to each other and are both semicircular ring structures; The inner sides of the upper bearing shell (6) and the lower bearing shell (8) are jointly provided with a self-lubricating mechanism adapted to the transmission shaft (4); the top of the upper bearing seat (2) is provided with an oil inlet port (3); the top of the upper bearing shell (6) is provided with an oil inlet hole (19) which is interconnected with the oil inlet port (3); and lubricating oil is added to the oil chamber formed by the lower bearing seat (1), the upper bearing seat (2) and the transmission shaft (4) through the oil inlet port (3) and the oil inlet hole (19); The transmission shaft (4) is symmetrically provided with axial support mechanisms at positions located inside the upper bearing (6) and the lower bearing (8), and the self-lubricating mechanism drives the lubricating oil to flow to generate power and generate a force on the axial support mechanism; The self-lubricating mechanism comprises a conveying groove (22) symmetrically arranged in the middle of the inner side of the upper bearing (6) and the lower bearing (8); a return installation groove (21) is symmetrically arranged in the middle of the inner side of the upper bearing (6) and the lower bearing (8) near the conveying groove (22); a plurality of groups of infusion holes (26) are evenly distributed on the inner side of the return installation groove (21); a support groove (25) connected to the return installation groove (21) is arranged at a position between the return installation groove (21) and the conveying groove (22) on the inner side of the upper bearing (6) or the lower bearing (8); the maximum axial distance between the two groups of the support grooves (25) is D2; a lower movable retaining ring (11) is engaged with the inner side of the return installation groove (21) located on the inner side of the lower bearing (8); and an upper movable retaining ring (5) is engaged with the inner side of the return installation groove (21) located on the inner side of the upper bearing (6); The axial support mechanism comprises two groups of limiting convex rings (9) arranged on the outside of the transmission shaft (4), the maximum axial distance between the two groups of limiting convex rings (9) is D1, wherein D1 is greater than D2, a plurality of groups of guide push plates (28) are evenly distributed on the side where the two groups of limiting convex rings (9) are close to each other, the guide push plates (28) are wedge-shaped structures, the guide push plates (28) are used to rotate with the limiting convex rings (9) and thus promote the rotational displacement of the lubricating oil, the guide push plates (28) located on the outside of the two groups of limiting convex rings (9) are symmetrically distributed, and a plurality of groups of liquid guide holes (29) penetrating the limiting convex rings (9) are evenly distributed on both sides of the limiting convex rings (9); The connecting ends of the upper movable retaining ring (5) and the lower movable retaining ring (11) are respectively provided with a connecting protrusion (13) and a connecting groove (14), the connecting protrusion (13) and the connecting groove (14) are engaged with each other, the outer diameter of the supporting groove (25) is smaller than the outer diameter of the reflux installation groove (21), the edge positions of the two groups of the limiting protrusion rings (9) extend to the inside of the reflux installation groove (21), and the upper movable retaining ring (5) and the lower movable retaining ring (11) are close to the limiting protrusion ring (9) and are in contact with the limiting protrusion ring (9); The width of the upper movable baffle ring (5) and the lower movable baffle ring (11) is smaller than the longitudinal width of the reflux mounting groove (21); the outer diameters of the upper movable baffle ring (5) and the lower movable baffle ring (11) are equal to the outer diameter of the reflux mounting groove (21); the infusion hole (26) is located on a side of the upper movable baffle ring (5) or the upper bearing (6) away from the limiting convex ring (9); and the sides of the upper movable baffle ring (5) and the lower movable baffle ring (11) close to the infusion hole (26) are both provided with an embedded reflux groove. A blocking ring (30) is disposed inside the reflux mounting groove (21), wherein a connecting block (31) is disposed between the blocking ring (30) and the upper movable baffle ring (5) or the lower movable baffle ring (11), and a flow gap is formed between the blocking ring (30) and the upper movable baffle ring (5) or the lower movable baffle ring (11) through the connecting block (31), and the flow gap corresponds to the infusion hole (26), and one side of the blocking ring (30) is in contact with the inner wall of the reflux mounting groove (21); Sealing mechanisms are symmetrically arranged at positions close to the output ends on the inner sides of the upper bearing shell (6) and the lower bearing shell (8), and the sealing mechanisms are interconnected with the self-lubricating mechanism.

2. The self-lubricating structure of a high-speed motor refrigerant sliding bearing according to claim 1, characterized in that: A conveying cavity (23) is provided inside the upper bearing shell (6) and the lower bearing shell (8) at a position close to the conveying groove (22), and a plurality of conveying holes (24) are distributed on the inner side of the conveying groove (22) and are interconnected with the conveying cavity (23). The outer side of the upper bearing shell (6) and the lower bearing shell (8) is partially provided with a plurality of mounting clips (18) that are mutually engaged with the inner side of the lower bearing seat (1) or the upper bearing seat (2).

3. The self-lubricating structure of a high-speed motor refrigerant sliding bearing according to claim 2, characterized in that: The other end of the infusion hole (26) passes through the interior of the upper bearing (6) or the lower bearing (8) and is communicated with the interior of the delivery hole (24); an infusion tube (27) is provided between the infusion hole (26) and the delivery hole (24); the aperture of the delivery hole (24) is larger than the aperture of the infusion hole (26); and the flow rate of the lubricating oil entering through the delivery hole (24) is larger than the flow rate of the lubricating oil entering through the infusion hole (26).

4. The self-lubricating structure of a high-speed motor refrigerant sliding bearing according to claim 3 is characterized in that: The outer sides of the upper movable baffle ring (5) and the lower movable baffle ring (11) are evenly distributed with a plurality of groups of limiting protrusions (10) that engage with the return flow installation grooves (21).

5. The self-lubricating structure of a high-speed motor refrigerant sliding bearing according to claim 1, characterized in that: The sealing mechanism comprises sealing installation grooves (20) arranged at both ends of the inner side of the upper bearing shell (6) or the lower bearing shell (8), wherein the cross section of the sealing installation groove (20) is a stepped structure, wherein the outer diameter of the inner side of the sealing installation groove (20) is larger than the outer diameter of the inner side thereof.

6. The self-lubricating structure of a high-speed motor refrigerant sliding bearing according to claim 5, characterized in that: An upper sealing ring (7) is engaged with the interior of the sealing installation groove (20) located on the inner side of the upper bearing shell (6), and a lower sealing ring (12) is engaged with the interior of the sealing installation groove (20) located on the inner side of the lower bearing shell (8). The lower sealing ring (12) and the upper sealing ring (7) are symmetrical structures. The lower sealing ring (12) and the upper sealing ring (7) have the same inner diameter and fit with the outer side of the transmission shaft (4). The inner side of the transmission shaft (4) is sealed by the lower sealing ring (12) and the upper sealing ring (7).

7. The self-lubricating structure of a high-speed motor refrigerant sliding bearing according to claim 6, characterized in that: The inner sides of the upper sealing ring (7) and the lower sealing ring (12) are provided with heat dissipation grooves (16), the inner sides of the heat dissipation grooves (16) are evenly distributed with a plurality of groups of heat dissipation holes (17), and the outer sides of the upper sealing ring (7) or the lower sealing ring (12) are provided with limit ring grooves (15), and the limit ring grooves (15) are mutually engaged with the sealing installation grooves (20).

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