Split bearing unit

Abstract

The application belongs to the technical field of bearings, and particularly relates to a split bearing unit, which comprises a split bearing seat, a split bearing box and a split cylindrical roller bearing; the bearing box comprises an upper bearing box and a lower bearing box, the split cylindrical roller bearing is arranged in a closed cavity formed by fixed connection of the upper bearing box and the lower bearing box, the cylindrical roller bearing is assembled on a shaft, and the split cylindrical roller bearing is provided with external support by the split bearing box; the bearing seat comprises an upper bearing seat and a lower bearing seat, the bearing seat is supported on the outer surface of the bearing box, the outer diameter surface of the bearing box is an outer spherical surface, and the inner diameter surface of the split bearing seat is an inner spherical surface; a limiting pin is arranged on the outer diameter surface of the split bearing box, and the inner diameter surface of the split bearing seat is provided with a recess for accommodating the swing of the limiting pin. The application has compact structure, high integration and high stability, meets the installation requirement of small space, is convenient to install and disassemble, is easy to maintain, has good stress performance, and has long service life.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bearings, and particularly relates to a high-speed ship transmission system split bearing unit. BACKGROUND

[0002] In a ship power system, a bearing unit is a crucial rotating support, and its performance directly determines the performance, service life and reliability of the power system. The bearing unit has a small design space, a high rotating speed, high installation limitations and particularity in use. In order to solve the problems of long straight shaft installation and disassembly difficulty in a harsh environment, it is urgent to design a split bearing unit with good stress performance, long service life and high reliability. SUMMARY

[0003] In view of the defects of the prior art and the requirements of the split bearing unit under the working condition, the purpose of the application is to provide a high-speed ship transmission system split bearing unit which can meet the installation and working condition requirements of users, save space and improve bearing life.

[0004] To achieve the above purpose, the technical scheme adopted by the application is as follows: a split bearing unit, comprising a split bearing seat, a split bearing box and a split cylindrical roller bearing; the split bearing box comprises an upper bearing box and a lower bearing box, and the split cylindrical roller bearing is arranged in a closed cavity formed by the fixed connection of the upper bearing box and the lower bearing box; the split cylindrical roller bearing is assembled on a shaft, and the split cylindrical roller bearing is provided with external support by the split bearing box; the split bearing seat comprises an upper bearing seat and a lower bearing seat, and the split bearing seat is supported on the outer surface of the split bearing box; the outer diameter surface of the split bearing box is a spherical outer surface, and the inner diameter surface of the split bearing seat is a spherical inner surface matched with the outer diameter surface of the split bearing box; a limit pin is arranged on the outer diameter surface of the split bearing box, and a recess for accommodating the swing of the limit pin is arranged on the inner diameter surface of the split bearing seat.

[0005] Further, the split bearing seat and the split bearing box are gap-fitted, the swing fitting of the limit pin in the recess is achieved, and the alignment of the split bearing box in any direction by ±2.5° is achieved; the limit pin is fixed on the upper top surface of the upper bearing box, and the recess is correspondingly arranged on the top of the upper bearing seat.

[0006] Further, the upper bearing seat and the lower bearing seat are both semicircular structures, and the upper bearing seat and the lower bearing seat are connected to form a circular inner cavity for assembling the split bearing box; in the upper bearing seat and the lower bearing seat, a fixed connection hole is arranged on the connecting end surface at each end of the semicircular structure of the bearing seat, and the fixed connection holes of the two bearing seats are correspondingly arranged, and the upper bearing seat and the lower bearing seat are connected through the fixed connection holes and connecting bolts.

[0007] Further, the upper bearing seat and the lower bearing seat, each semi-circular structure of the bearing seat is provided with a positioning hole on the connecting end face of both ends, respectively, the two positioning holes on the two connecting end faces are provided on the same side, and the positioning holes of the two bearing seats are correspondingly provided and assembled with a cylindrical pin for error-proof positioning.

[0008] Further, the cylindrical pin is in interference fit with the lower bearing seat positioning hole, and the cylindrical pin is in small gap fit with the upper bearing seat positioning hole.

[0009] Further, the connecting end faces of the two ends of the lower bearing seat extend outward along the radial direction, the extension part and the connecting end face continue to form two horizontal assembly faces, two positioning bolt mounting holes for connecting external components are further provided on each assembly face, two top pin holes for adjusting the position height of the lower bearing seat, and a positioning pin hole matched with the user positioning pin, and all the holes on the two assembly faces are symmetrically arranged.

[0010] Further, the assembly faces are randomly set along the non-load-bearing position outside the holes, forming an irregular outer contour.

[0011] Further, the upper bearing box and the lower bearing box, the connecting end face of each single bearing box is provided with two center-symmetric positioning holes symmetrically along the center line, and the center-symmetric positioning holes of the two bearing boxes are correspondingly arranged for up-down error-proof positioning.

[0012] Further, the same side of the upper bearing box and the lower bearing box is provided with corresponding mark grooves for front-rear error-proof positioning, and the mark grooves are funnel-shaped grooves.

[0013] Further, the lower bearing box is provided with a temperature measuring screw hole at the bottom, and the hole depth of the temperature measuring screw hole reaches the end face of the outer ring of the split cylindrical roller bearing.

[0014] Further, the split cylindrical roller bearing comprises an inner ring, an outer ring, a retainer and cylindrical rollers, the cylindrical rollers are installed between the inner ring and the outer ring through the retainer, the outer ring is in small gap fit with the split bearing box, the outer ring is without a retaining edge, the inner assembly composed of the bearing inner ring, the retainer and the cylindrical rollers is spaced apart from the end cover of the split bearing box, and the bearing inner assembly has an axial displacement space in the split bearing box and does not interfere with the split bearing box.

[0015] Further, the inner ring, the cage and the outer ring are respectively combined by a double half inner ring, a double half cage and a double half outer ring, the outer surface of the double half inner ring is respectively provided with a first clamping groove and a second clamping groove, the first clamping groove and the second clamping groove are arranged on both sides of the raceway of the double half inner ring, the double half clamping ring is matched with the clamping groove, two double half clamping rings in the first clamping groove are connected by a screw to form a first clamping ring, two double half clamping rings in the second clamping groove are connected by a screw to form a second clamping ring, a first recess is arranged on the first clamping groove, and a second recess is arranged on the second clamping groove, and the first recess and the second recess are different in width.

[0016] Further, the inner diameter of the joint of the double half inner ring is provided with a missing angle.

[0017] Further, the joint of the double half outer ring is a trapezoidal structure, and the included angle between the upper base and the waist of the trapezoidal structure is 20°.

[0018] Further, the inner end surface of the double half clamping ring is provided with a positioning platform, and the outer cylindrical surface of the positioning platform is higher than the raceway of the double half inner ring.

[0019] Further, the joint position of the first clamping ring is separated from the joint position of the double half inner ring by 90°, and the joint position of the second clamping ring is separated from the joint position of the double half inner ring by 90°.

[0020] Further, the double half cage includes two half cages, the half cage includes a half cage seat and a half cage cover, and the half cage seat and the half cage cover are connected by self-riveting in a split type.

[0021] Further, the double half cage is connected by a connecting sheet, a plurality of through holes are arranged on the connecting sheet, and a screw for fixedly connecting the double half cage is arranged on the through hole.

[0022] Further, the first half cage body and the second half cage body in the double half cage are locked by a clamping beam, the two ends of the first half cage body and the second half cage body are provided with a half-round cage with a boss, the clamping beam is combined by a first boss of the first half cage body and a second boss of the second half cage body, the first boss and the second boss are bosses of the same structure, a concave groove is arranged on the inner diameter surface of the joint of the first half cage body and the second half cage body, and the concave groove is combined by a first rectangular groove of the first half cage body and a second rectangular groove of the second half cage body.

[0023] Further, the locking clamp is a U-shaped elastic clamp, the U-shaped elastic clamp is composed of a pair of clamping arms, a fastening part and a bending part, the pair of clamping arms gradually decrease to the fastening part to form an elastic clamping opening, and the lower end of the fastening part at both ends of the locking clamp is provided with a bending part.

[0024] Further, the convex platform is composed of a large right trapezoid, a cuboid and a small right trapezoid; the included angle between the upper base of the large right trapezoid section and the oblique waist of the section is obtuse angle one; the included angle between the upper base of the small right trapezoid section and the oblique waist of the section is obtuse angle two; the inclination angles of the obtuse angle one and the obtuse angle two are the same; the length of the upper base of the large right trapezoid section is smaller than that of the small right trapezoid section.

[0025] Further, the fastening part of the locking card is in contact with the oblique waist surface of the small right trapezoid; the width of the locking card is the same as the axial width of the clamping beam; the bending part is located inside the concave groove.

[0026] Further, the straight hole is arranged near the outer diameter of the pocket of the first half holder body and the second half holder body, and the tapered hole is arranged near the inner diameter; four locking points are arranged at the outer diameter of the straight hole; the four corners of the roller pocket are provided with elliptical tool withdrawal grooves.

[0027] Further, the split bearing box is assembled on the shaft through two end covers, and sealing rings are arranged at the contact positions of the two end covers and the shaft; the sealing ring is composed of two half sealing rings, and the two half sealing rings are combined to form a circular sealing ring.

[0028] Further, a sealing ring groove is formed in the outer side of the two end covers, and the sealing ring is assembled in the sealing ring groove; a fixed plate is arranged outside the sealing ring groove, and the fixed plate is fixed to the end cover of the bearing box through a fixed bolt; the sealing ring is in interference fit with the fixed plate in the axial direction.

[0029] Further, the fixed plate is composed of two half fixed plates, and the two half fixed plates are combined to form a circular fixed plate; an interface is formed at the combined position of the two half fixed plates, which is a fixed plate interface; an interface is formed at the combined position of the two half sealing rings, which is a sealing ring interface; the sealing ring interface and the fixed plate interface are arranged at an interval of 90°.

[0030] Further, the sealing ring is composed of a body part and a sealing part; the body part extends to the inner diameter side to form the sealing part; the sealing part includes a first sealing lip and a second sealing lip; the first sealing lip is in contact with the shaft, and the second sealing lip is in interference fit with the shaft.

[0031] Further, a first sealing lip opening is arranged at the bottom of the first sealing lip, and the sealing surface of the first sealing lip opening is a flat surface; a second sealing lip opening is arranged at the bottom of the second sealing lip, and the sealing surface of the second sealing lip opening is an obtuse point.

[0032] Further, three circular arc grooves are arranged on the sealing ring, which are a first circular arc groove, a second circular arc groove and a third circular arc groove; the first circular arc groove is arranged on the end face of the sealing ring close to the first sealing lip, the third circular arc groove is arranged on the end face of the sealing ring away from the first sealing lip, and the second circular arc groove is arranged on the side wall of the third circular arc groove close to the second sealing lip.

[0033] Further, the end face of the sealing ring away from the first sealing lip is divided into a first end face part and a second end face part by the third circular arc groove, the second end face part is perpendicular to the top face of the sealing ring, and the first end face part is not perpendicular to the top face of the sealing ring.

[0034] Further, a spring is arranged in the second circular arc groove.

[0035] The split bearing unit has the advantages that the split bearing unit has compact structure, high integration and high stability, meets the requirement of small space installation, is integrally split into upper and lower parts, is convenient to install and disassemble, is easy to maintain, the cooperation of the limiting pin and the concave cavity enables the split bearing box to have the aligning function and avoids the split bearing box and the split bearing seat from being separated, has good stress performance, and has long service life. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a split bearing unit structure schematic diagram;

[0037] Figure 2 It is an upper bearing seat installation surface view;

[0038] Figure 3 It is a lower bearing seat three-dimensional model diagram;

[0039] Figure 4 It is a lower bearing seat top view;

[0040] Figure 5 It is a lower bearing seat conventional contour design diagram;

[0041] Figure 6 It is an upper bearing box structure schematic diagram;

[0042] Figure 7 It is a split bearing unit sectional view;

[0043] Figure 8 It is a split cylindrical roller bearing schematic diagram;

[0044] Figure 9 It is a half outer ring cutout schematic diagram;

[0045] Figure 10 It is an inner ring schematic diagram;

[0046] Figure 11 It is an inner ring left view;

[0047] Figure 12 Fig. 1 is a schematic view of the inner ring grinding;

[0048] Figure 13 Fig. 2 is a schematic view of the inner ring and shaft installation;

[0049] Figure 14 Fig. 3 is a schematic view of the half retainer seat in Example 1;

[0050] Figure 15 Fig. 4 is a schematic view of the half retainer cover in Example 1;

[0051] Figure 16 Fig. 5 is a schematic view of the connecting piece in Example 1;

[0052] Figure 17 Fig. 6 is a schematic view of the half retainer body in Example 1; Figure 8 Fig. 7 is a view of A-A in Fig. 6;

[0053] Figure 18 Fig. 8 is a perspective view of the retainer structure in Example 2;

[0054] Figure 19 Fig. 9 is a schematic view of the first half retainer body and the second half retainer body in Example 2;

[0055] Figure 20 Fig. 10 is a schematic view of the retainer pocket in Example 2;

[0056] Figure 21 Fig. 11 is a sectional view of the first half retainer body and the second half retainer body in Example 2;

[0057] Figure 22 Fig. 12 is a schematic view of the retainer lock roller in Example 2;

[0058] Figure 23 Fig. 13 is a schematic view of the retainer structure in Example 2;

[0059] Figure 24 Fig. 14 is a schematic view of the locking clip in Example 2;

[0060] Figure 25 Fig. 15 is a schematic view of the first half retainer body and the second half retainer body joint in Example 2;

[0061] Figure 26 Fig. 16 is a right view of the retainer boss in Example 2;

[0062] Figure 27 Fig. 17 is an isometric view of the retainer boss in Example 2;

[0063] Figure 28 Fig. 18 is a sectional view of the special-shaped sealing ring of the bearing box;

[0064] Figure 29 Fig. 19 is an assembly view of the special-shaped sealing ring of the bearing box;

[0065] Figure 30 is a fixed plate structure schematic diagram;

[0066] Figure 31 is a sealing ring and fixed plate structure schematic diagram after cooperation and installation;

[0067] Figure 32 is a semi-sealing ring and semi-fixed plate structure schematic diagram after cooperation and installation;

[0068] In the figure: 1, locking point, 2, oval tool withdrawal groove, 3, straight pocket hole, 4, tapered pocket hole, 5, clamping beam, 501, first boss, 502, second boss, 511, large straight trapezoidal body, 512, cuboid, 513, small straight trapezoidal body, 6, concave groove, 601, first rectangular groove, 602, second rectangular groove, 7, shaft, 8, locking clamp, 811, a pair of clamping arms, 812, fastening part, 813, bending part, 9, first half retainer body, 10, second half retainer body, 11, half inner ring, 12, half retainer, 12-1, half retainer seat, 12-2, half retainer cover, 13, half outer ring, 14-1, first clamping groove, 14-2, second clamping groove, 15-1, first clamping ring, 15-2, second clamping ring, 16, positioning table, 17, connecting sheet, 18, split bearing seat, 18-1, recess, 18-2, fixed connecting hole, 18-3, positioning hole, 18-4, assembly surface, 18-5, positioning bolt mounting hole, 18-6, jackscrew hole, 18-7, positioning pin hole, 19, split bearing box, 19-1, limiting pin, 19-2, center-symmetrical positioning hole, 19-3, indicating groove, 19-4, temperature measuring screw hole, 20, split cylindrical roller bearing, 21, connecting bolt, 22, conventional sealing ring, 23, special-shaped sealing ring, 23-1, first sealing lip, 23-2, second sealing lip, 23-3, first circular arc groove, 23-4, second circular arc groove, 23-5, third circular arc groove, 23-6, first end surface part, 23-7, second end surface part, 24, sealing ring groove, 25, fixed plate, 26, fixed bolt, 27, fixed plate interface, 28, sealing ring interface;

[0069] a, missing angle, b, gap. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0071] Embodiment 1

[0072] Referring to the drawings Figure 1, split bearing unit, comprising split bearing housing 18, split bearing box 19 and split cylindrical roller bearing 20; the split bearing box 19 comprises an upper bearing box and a lower bearing box, and the split cylindrical roller bearing 20 is arranged in the closed cavity formed by the fixed connection of the upper bearing box and the lower bearing box, the split cylindrical roller bearing 20 is assembled on the shaft 7, and the split cylindrical roller bearing 20 is provided with external support by the split bearing box 19; the split bearing housing 18 comprises an upper bearing housing and a lower bearing housing, and the split bearing housing 18 is supported on the outer surface of the split bearing box 19; the outer diameter surface of the split bearing box 19 is a spherical surface, and the inner diameter surface of the split bearing housing 18 is an inner spherical surface matched with the outer diameter surface of the split bearing box; the outer diameter surface of the split bearing box 19 is provided with a limiting pin 19-1, and the inner diameter surface of the split bearing housing 18 is provided with a recess 18-1 for accommodating the swing of the limiting pin 19-1.

[0073] Further, the split bearing housing 18 and the split bearing box 19 are clearance fitted, the swing fitting of the limiting pin 19-1 in the recess 18-1 realizes the alignment of the split bearing box 19 in any direction ±2.5°; the limiting pin 19-1 is fixed on the upper top surface of the upper bearing box, and the recess 18-1 is correspondingly arranged on the top of the upper bearing housing.

[0074] Based on the above technical scheme, the inner diameter of the split bearing housing 18 is an inner spherical surface, the outer diameter of the split bearing box 19 is an outer spherical surface structure, there is a certain gap (the specific value is determined according to the size) at the matching position of the bearing housing 18 and the bearing box 19, the recess 18-1 on the top of the upper bearing housing matches with the limiting pin 19-1 on the top of the upper bearing box, and the alignment function in any direction ±2.5° can be realized.

[0075] Further, referring to the accompanying drawings Figures 2-4 , the upper bearing housing and the lower bearing housing are both semicircular structures, and the upper bearing housing and the lower bearing housing are connected to form a circular inner cavity for assembling the split bearing box 19; in the upper bearing housing and the lower bearing housing, a fixed connection hole 18-2 is arranged on the connecting end surface at each end of the semicircular structure of the bearing housing, the fixed connection holes 18-2 of the two bearing housings are correspondingly arranged, and the upper bearing housing and the lower bearing housing are connected through the fixed connection hole 18-2 and the connecting bolt 21.

[0076] Further, in the upper bearing housing and the lower bearing housing, a positioning hole 18-3 is arranged on the connecting end surface at each end of the semicircular structure of the bearing housing, the two positioning holes 18-3 on the two connecting end surfaces are arranged on the same side, and the positioning holes 18-3 of the two bearing housings are correspondingly arranged and assembled with a cylindrical pin for error-proof positioning.

[0077] Further, the cylindrical pin is in interference fit with the positioning hole of the lower bearing housing; the cylindrical pin is in small gap fit with the positioning hole of the upper bearing housing.

[0078] Based on the above technical scheme, the coupling end face of the upper bearing seat is designed with two positioning holes 18-3 on the same side, as shown in Figure 2 The lower bearing seat is also designed with a positioning hole 18-3 on the same side, as shown in Figure 4 The cylindrical positioning pin is installed into the positioning hole of the lower bearing seat, and the cylindrical pin is in interference fit with the positioning hole of the lower bearing seat, and the positioning hole of the upper bearing seat is in small gap fit with the cylindrical pin. During installation, the purpose of error prevention is achieved.

[0079] Further, referring to the accompanying Figures 3-4 The coupling end face of the lower bearing seat extends radially outward on both ends, and two horizontal assembly faces 18-4 are formed in continuation with the coupling end face. Each assembly face 18-4 is also provided with two positioning bolt mounting holes 18-5 for connecting external components, two jack hole 18-6 for adjusting the height of the lower bearing seat, one positioning pin hole 18-7 for cooperating with the user positioning pin, and all the holes on the two assembly faces 18-4 are symmetrically arranged.

[0080] Based on the above technical scheme, the lower bearing seat of the split bearing unit is designed as a cantilever structure, as shown in Figure 3 The assembly face 18-4 of the lower bearing seat is designed with four positioning bolt mounting holes 18-5, two positioning pin holes 18-7 and four jack holes 18-6. The positioning bolt mounting holes 18-5 facilitate the installation and fixation of the split bearing unit with the main machine. Due to the special structure, the positioning pin hole 18-7 cooperates with the user positioning pin for positioning, and the jack hole 18-6 facilitates the adjustment of the height of the lower bearing seat.

[0081] Further, referring to the accompanying Figures 3-4 The assembly face is randomly set at the non-bearing position outside the hole, forming an irregular outer contour.

[0082] Based on the above technical scheme, the lower bearing seat of the split bearing unit is designed to be lightweight. The conventional design (as shown in Figure 5 On this basis, the non-bearing position of the lower bearing seat is optimized and analyzed to meet the user's usage requirements.

[0083] Further, as shown in Figure 6 The coupling end face of each individual bearing box is provided with two center symmetric positioning holes 19-2 symmetrically along the center line, and the center symmetric positioning holes 19-2 of the two bearing boxes are correspondingly arranged for up-down error prevention positioning.

[0084] Based on the above technical scheme, the upper and lower bearing boxes are respectively designed with center symmetric positioning holes 19-2, which have the same principle as the bearing box positioning hole, and can also achieve the purpose of preventing installation errors of the upper and lower bearing boxes.

[0085] Further, the same side of the upper bearing box and the lower bearing box is respectively provided with a corresponding mark groove 19-3 for front and back error prevention positioning. The mark groove is a funnel-shaped groove.

[0086] Based on the above technical solution, the back of the upper bearing box and the lower bearing box is respectively designed as a funnel-shaped groove, as shown in Figure 6 , which facilitates distinguishing the front and back of the bearing box and achieves the error prevention purpose.

[0087] Further, as shown in Figure 7 , the bottom of the lower bearing box is provided with a temperature measurement threaded hole 19-4, and the hole depth of the temperature measurement threaded hole 19-4 reaches the end face of the split cylindrical roller bearing outer ring.

[0088] Based on the above technical solution, the bottom of the lower bearing box is designed with a temperature measurement threaded hole 19-4, and the hole depth reaches the end face of the split cylindrical roller bearing outer ring, which facilitates real-time monitoring of the temperature of the split bearing unit product during ship navigation.

[0089] Further, the split cylindrical roller bearing 20 includes an inner ring, an outer ring, a retainer, and cylindrical rollers. The cylindrical rollers are installed between the inner ring and the outer ring through the retainer. The outer ring is matched with the split bearing box 19 in a small gap. The outer ring has no stop edge. The inner assembly composed of the bearing inner ring, the retainer, and the cylindrical rollers is arranged in a space between the end cover of the split bearing box 19. The bearing inner assembly has an axial displacement space in the split bearing box 19 and does not interfere with the split bearing box.

[0090] In the split bearing unit, the outer ring of the split cylindrical roller bearing is matched with the bearing box in a small gap. After assembly, the outer ring moves with the bearing box. The outer ring has no stop edge. The bearing inner assembly can have a certain range of axial displacement (the specific value is determined according to user requirements) and does not interfere with the bearing box (as shown in Figure 7 ), which ensures the normal operation of the split bearing unit in harsh environments.

[0091] It should be noted that the split cylindrical roller bearing 20 in the embodiment can be a conventional split bearing known to those skilled in the art, as long as it can meet the assembly requirements of the split bearing unit.

[0092] In another embodiment, the split cylindrical roller bearing 20 can also have a special structure for assembly. Specifically, referring to the attached Figures 8-17 , the inner ring, the retainer, and the outer ring are respectively composed of a double-half inner ring, a double-half retainer, and a double-half outer ring. The bearing assembly process and structure are as follows:

[0093] Step 1: Install the inner ring. Install the double-half inner ring 1 on the shaft. The inner diameter of the joint of the double-half inner ring 1 has an angle, which ensures that the half inner ring is assembled on the shaft without scratching the shaft diameter.

[0094] Specifically, the joint of the double half inner ring 1 is designed as a 6° cross structure, so that the connection of the two half inner rings is more firm; the gap of the double half inner ring 1 is 0.4mm-0.6mm, so that when the roller, the retainer and the bearing outer ring are all installed, the roller rolls on the raceway of the bearing inner ring. In the process of rolling of the roller between the first end of the first half inner ring and the first end of the second half inner ring and between the second end of the second half inner ring and the second end of the first half inner ring, the roller rolls through the inclined groove, and compared with the straight groove, the process of rolling of the roller through the inclined groove changes from point contact to line contact, the rolling of the roller is more linear, the vibration is reduced, the operation is more stable, and the service life is improved.

[0095] Step 2: Install the clamping ring, connect the two half clamping rings by screws, one of which is provided with a groove and a screw through hole, and the other of which is provided with a threaded hole, and the two half clamping rings are connected by the screw through the screw through hole and the threaded hole. The screw connection makes the half clamping ring tightly fixed on the half inner ring, and the half clamping ring is convenient to disassemble and assemble.

[0096] Specifically, the double half inner ring includes two half inner rings, the outer surfaces of the half inner rings are respectively provided with a first clamping groove 14-1 and a second clamping groove 14-2, the first clamping groove 14-1 and the second clamping groove 14-2 are arranged on both sides of the raceway of the half inner ring, the half clamping ring is matched with the clamping groove, the two half clamping rings in the first clamping groove 14-1 are connected by screws to form a first clamping ring 15-1, and the two half clamping rings in the second clamping groove 14-2 are connected by screws to form a second clamping ring 15-2; a first recess is arranged on the first clamping groove 14-1, and a second recess is arranged on the second clamping groove 14-2, the widths of the first recess W1 and the second recess W2 are different to prevent mismatch; the inner end surface of the half clamping ring is provided with a positioning table 16, and the outer cylindrical surface of the positioning table 16 is higher than the raceway of the half inner ring, which not only can block the cylindrical roller, but also the positioning table 16 and the half clamping ring are an integral structure, which is convenient to process and disassemble and assemble, and through the design of the half retainer cover and the half retainer seat, the cylindrical roller runs more stably.

[0097] Specifically, the joint position of the first clamping ring 15-1 is separated from the joint position of the double half inner ring by 90°, and the joint position of the second clamping ring 15-2 is separated from the joint position of the double half inner ring by 90°, so as to improve the overall strength of the bearing. If the joint position of the clamping ring is the same as the joint position of the inner ring, the joint is the weak part of the split bearing unit, which causes the bearing to be damaged in advance.

[0098] Step 3: Assemble the half retainer roller assembly, sequentially install the rollers into the half retainer seat 12-1, install the half retainer cover 12-2, and rivet the half retainer seat 12-1 and the half retainer cover 12-2 to form a non-separable half retainer roller assembly.

[0099] Step 4: Install the half-retainer roller assembly, connect the two half-retainer roller assemblies through the connecting piece 17 and the bolt, and place the two half-retainer roller assemblies on the outer raceway of the inner ring at the same time. The double half-retainer assembly is connected through the connecting piece 17, and the connecting piece 17 is provided with a plurality of through holes, and the through holes are provided with screws for fixing and connecting the double half-retainer. The connection of the two half-retainers through the connecting piece 17 is more convenient and firm.

[0100] Step 5: Install the outer ring, install the double half-outer ring on the half-retainer roller assembly; the outer ring has no retaining edge, and after assembly, the first clamping ring 15-1 and the second clamping ring 15-2 play the role of retaining edge.

[0101] Specifically, the joint of the double half-outer ring is a trapezoidal structure, and the included angle between the upper base and the waist of the trapezoidal structure is 20°, so that the matching precision of the double half-outer ring is higher.

[0102] Further, the split bearing housing 19 is assembled on the shaft 7 through two end covers, and the sealing rings 22 are arranged at the contact positions of the two end covers and the shaft 7. The sealing rings 22 are composed of two half-sealing rings, and the two half-sealing rings are matched to form a circular sealing ring.

[0103] Based on the above technical solution, the internal space of the split bearing housing 19 is sealed by the sealing ring 22, so as to avoid the split cylindrical roller bearing 20 in the split bearing housing 19 from leaking grease or external impurities from entering the split bearing housing 19 to affect the service life of the split cylindrical roller bearing 20.

[0104] It should be noted that the sealing ring 22 in the embodiment can be a common sealing ring structure for those skilled in the art, such as a felt sealing ring, as long as it can meet the assembly requirements of the split bearing unit. The sealing ring is embedded in the middle of the inner diameter of the end cover and contacts the shaft 7 to achieve sealing, as shown in Figure 7 .

[0105] In another embodiment, the sealing ring 23 can also be a special-shaped structure to improve the sealing performance. Specifically, referring to the accompanying Figures 28-32 , the outer side of the two end covers is provided with a sealing ring groove 24, and the special-shaped sealing ring 23 is assembled in the sealing ring groove 24. The outer side of the sealing ring groove is provided with a fixed plate 25, and the fixed plate 25 is fixed with the end cover of the bearing housing 19 through a fixed bolt 26. The special-shaped sealing ring 23 is in interference fit with the fixed plate 25 in the axial direction.

[0106] Specifically, the fixed plate 25 is composed of two half-fixed plates, and the two half-fixed plates are matched to form a circular fixed plate. The interface formed by the cooperation of the two half-sealing rings is a sealing ring interface 28, and the sealing ring interface 28 is arranged at an angle of 90° from the fixed plate interface 27.

[0107] Specifically, the special-shaped sealing ring 23 is composed of a body part and a sealing part, the body part extends to the inner diameter side to form the sealing part, the sealing part includes a first sealing lip 23-1 and a second sealing lip 23-2, the first sealing lip 23-1 is in contact with the shaft 7, and the second sealing lip 23-2 is in interference fit with the shaft 7 to ensure that the lubricating grease does not leak out.

[0108] Specifically, the bottom of the first sealing lip 23-1 is provided with a first sealing lip opening, and the sealing surface of the first sealing lip opening is a plane; the bottom of the second sealing lip 23-2 is provided with a second sealing lip opening, and the sealing surface of the second sealing lip opening is an obtuse angle sharp point. The actual size of the sharp point at the sealing lip is smaller than the actual size of the shaft, and the tolerance band of the size of the sharp point at the sealing lip is below the shaft. The interference amount is determined according to the rotating speed and the specific size, which effectively prevents external impurities, mud and the like from entering.

[0109] Specifically, the special-shaped sealing ring 23 is further provided with three circular arc grooves, namely a first circular arc groove 23-3, a second circular arc groove 23-4 and a third circular arc groove 23-5; the first circular arc groove 23-3 is located on the end face of the special-shaped sealing ring 23 close to the first sealing lip 23-1, the third circular arc groove 23-5 is located on the end face of the special-shaped sealing ring 23 away from the first sealing lip 23-1, and the second circular arc groove 23-4 is arranged on the side wall close to the second sealing lip 23-2. The arrangement of the first circular arc groove 23-3, the second circular arc groove 23-4 and the third circular arc groove 23-5 on the sealing ring 23 can ensure that the elastic deformation after stress does not affect the sealing effect of the sealing ring.

[0110] Specifically, the end face of the special-shaped sealing ring 23 away from the first sealing lip 23-1 is divided into a first end face part 23-6 and a second end face part 23-7 by the third circular arc groove 23-5, the second end face part 23-7 is perpendicular to the top surface of the special-shaped sealing ring 23, and the first end face part 23-6 is not perpendicular to the top surface of the special-shaped sealing ring 23. The first end face part 23-6 and the second end face part 23-7 are compressed and fixed to the fixed plate 25 in the axial direction. The first end face part 23-6 is designed to be inclined, which optimizes the sealing shape, reduces the sealing weight, and reduces the friction with the fixed plate.

[0111] Specifically, a spring can be arranged in the second circular arc groove 23-4 to improve the sealing effect of the sealing ring.

[0112] After the special-shaped sealing ring 23 is pressed into the sealing ring groove 24, a fixed plate 25 is installed at the end face of the special-shaped sealing ring 23. When the fixed plate is installed, the fixed plate interface 27 is separated from the sealing ring interface 28 by 90°, and the fixed plate is fixed by the fixed bolt 26 to prevent impurities from entering from the outside. This sealing structure is suitable for severe splashing and complete immersion and the like. When the fixed plate is installed, the lower part of the sealing ring is not deformed, the fixed plate 25 plays a role in preventing the special-shaped sealing ring 23 from falling out, and can also block part of the impurities from entering.

[0113] The sealing structure is applied to a bearing box of a split bearing unit, is suitable for severe splashing or complete immersion and the like, can ensure that the internal space of the bearing box is clean, reduce the leakage of lubricating grease, reduce the frequency of maintenance and repair, and ensure the efficient operation of equipment, and is a split sealing structure with good stress performance, long service life and high reliability.

[0114] The split bearing unit for a high-speed ship transmission system provided by the embodiment can practically meet the installation and use working condition requirements of users, save use space, and improve bearing life.

[0115] Embodiment 2

[0116] The technical solution of embodiment 2 is basically the same as that of embodiment 1, and the difference lies in the cage structure of the split cylindrical roller bearing and the bearing assembly method.

[0117] Referring to the accompanying drawings Figures 18-27 The specific steps of the bearing assembly method are as follows:

[0118] Step 1: Install the inner ring, which is the same as in embodiment 1.

[0119] Step 2: Install the clamping ring, which is the same as in embodiment 1.

[0120] Step 3: Assemble the half-cage roller assembly, which is the same as in embodiment 1.

[0121] Step 4: Install the half-cage roller assembly. Two half-cage roller assemblies are placed on the outer raceway of the inner ring at the same time, and are fixed by the locking clamps 8.

[0122] Further, the first half-cage body 9 and the second half-cage body 10 are connected into an integrated cage by the clamping beam 5 cooperating with the locking clamps 8, the two ends of the first half-cage body 9 and the second half-cage body 10 are provided with bosses, the clamping beam 5 is formed by the first boss 501 of the first half-cage body 9 and the second boss 502 of the second half-cage body 10, the first boss 501 and the second boss 502 are bosses of the same structure, the concave groove 6 is arranged on the inner diameter surface at the connection position of the first half-cage body 9 and the second half-cage body 10, and the concave groove 6 is formed by the first rectangular groove 601 of the first half-cage body 9 and the second rectangular groove 602 of the second half-cage body 10.

[0123] Further, the locking card 8 is a U-shaped elastic clamp; the U-shaped elastic clamp is composed of a pair of clamp arms 811, a fastening part 812 and a bending part 813; the pair of clamp arms 811 gradually narrows to the fastening part 812 to form an elastic clamping opening; the fastening part 812 at both ends of the locking card 8 extends to the bending part 813.

[0124] Further, the boss is composed of a large right-angled trapezoidal body, a cuboid and a small right-angled trapezoidal body; the included angle between the upper base of the large right-angled trapezoidal body and the oblique waist of the section is obtuse angle one, which is beneficial to the contact between the bending part 813 of the locking card 8 and the oblique waist surface of the large right-angled trapezoidal body, so that the locking card 8 is better fitted on the clamping beam 5, and the maximum time and labor is saved; the included angle between the upper base of the small right-angled trapezoidal body and the oblique waist of the section is obtuse angle two, which is beneficial to the cooperation between the fastening part 812 of the locking card 8 and the oblique waist surface of the small right-angled trapezoidal body, so that the connection between the two half retainer bodies is more tightly, and the two half retainer bodies become an integrated retainer; the inclination angles of the obtuse angle one and the obtuse angle two are the same, and the preferred angle is 135° inclination angle and easy to process the boss; the length of the upper base of the large right-angled trapezoidal body is less than the length of the upper base of the small right-angled trapezoidal body.

[0125] Further, the fastening part 812 of the locking card 8 is in contact with the oblique waist surface of the small right-angled trapezoidal body; the width of the locking card 8 is the same as the axial width of the clamping beam 5, which realizes the limiting function of the two half retainer bodies, prevents the two half retainer bodies from moving in the axial direction, and causes the two half retainer bodies to be misaligned in the inner and outer diameters; the bending part 813 is located inside the concave groove 6, which prevents the bending part 813 of the locking card 8 from protruding from the inner diameter surface of the two half retainer bodies, so as to scratch the cylindrical roller.

[0126] Further, the straight hole is provided with four locking points at the outer diameter, which is to ensure that the roller is not scratched and does not fall out from the outer diameter direction after being assembled from the outer diameter; the four corners of the roller hole are provided with oval relief grooves, which prevents stress concentration and facilitates the roller to be assembled from the outer diameter direction.

[0127] The assembly method of the split cylindrical roller bearing retainer includes the following steps:

[0128] a. The cylindrical roller is pressed into the retainer from the outer diameter direction to form a roller retainer assembly;

[0129] b. The first half retainer body 9 and the second half retainer body 10 with the cylindrical roller are assembled to the bearing inner ring.

[0130] c. The positioning block is placed in the concave groove 6, so that the inner and outer diameters of the first half retainer body 9 and the second half retainer body 10 are aligned; the positioning block is a rectangular block matched with the concave groove 6; during installation, the concave groove 6 of the retainer is used to position the positioning block, so as to ensure that the inner and outer diameters and the first rectangular groove 601 and the second rectangular groove 602 are aligned, so as to facilitate the subsequent assembly of the locking card 8;

[0131] d. The positioning block is removed from the end surface of the retainer, and the stability of the first half retainer body 9 and the second half retainer body 10 is ensured; the positioning block can also not be removed, and the locking card 8 can be directly assembled on the clamping beam 5, and the positioning block will be automatically removed with the pushing of the locking card 8;

[0132] e. The locking card 8 is assembled into the connection between the first half retainer body 9 and the second half retainer body 10, and after the locking card 8 is in interference fit with the clamping beam 5, the two half retainer bodies are combined into an integrated retainer; the bent part 813 of the locking card 8 first contacts the inclined waist surface of the large right-angled trapezoidal body, and with the advancement of the locking card 8, the fastening part 812 of the locking card 8 will be clamped with the inclined waist surface of the small right-angled trapezoidal body, so as to ensure the fastening of the connection.

[0133] Step 5: Install the outer ring, same as example 1.

[0134] The embodiment has the following beneficial effects: the split cylindrical roller bearing retainer of the embodiment 2 is connected by the locking card 8, after the first half retainer body 9 and the second half retainer body 10 are aligned, the locking card 8 is assembled into the retainer, the structure is simple, and the two half retainers have the same structure, which greatly saves the machining time, effectively improves the machining efficiency, and provides a split cylindrical roller bearing retainer which has good stress performance, long service life and high reliability.

[0135] It should be noted that the parts not described in detail in the present application are prior art.

[0136] The above is only the best embodiment of the present application. Obviously, the present application is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or inferred by those skilled in the art from the disclosure of the present application should be considered as falling within the scope of protection of the present application.

Claims

1. A split bearing unit, characterized in that: The system includes a split bearing housing, a split bearing box, and a split cylindrical roller bearing. The split bearing box comprises an upper bearing box and a lower bearing box, and the split cylindrical roller bearing is housed within a closed cavity formed by the fixed connection of the upper and lower bearing boxes. The split cylindrical roller bearing is mounted on a shaft, and the split bearing box provides external support for the split cylindrical roller bearing. The split bearing housing comprises an upper bearing housing and a lower bearing housing, and the split bearing housing is supported on the outer surface of the split bearing box. The outer diameter surface of the split bearing box is an outer spherical surface, and the inner diameter surface of the split bearing housing is an inner spherical surface that mates with the outer diameter surface of the split bearing box. A limit pin is provided on the outer diameter surface of the split bearing box, and a recess for accommodating the swing of the limit pin is provided on the inner diameter surface of the split bearing housing. The split cylindrical roller bearing includes an inner ring, an outer ring, a cage, and cylindrical rollers. The cylindrical rollers are mounted between the inner ring and the outer ring via the cage. The outer ring has a small clearance fit with the split bearing housing and has no flanges. The inner ring, cage, and outer ring are respectively composed of a double-half inner ring, a double-half cage, and a double-half outer ring; The first and second half-cages of the double-half-cage are connected by a clamping beam and a locking clip. Both ends of the first and second half-cages are semi-circular retainers with bosses. The clamping beam is formed by combining the first boss of the first half-cage and the second boss of the second half-cage. The first and second bosses are of the same structure. A concave groove is provided on the inner diameter surface at the connection between the first and second half-cages. The concave groove is formed by combining the first rectangular groove of the first half-cage and the second rectangular groove of the second half-cage. The locking clip is a U-shaped elastic clip. The U-shaped elastic clip consists of a pair of clamping arms, a fastening part, and a bending part. The pair of clamping arms gradually narrow downwards until the fastening part forms an elastic clamping opening. The lower ends of the fastening parts at both ends of the locking clip have bending parts. The boss is composed of a large right-angled trapezoid, a cuboid, and a small right-angled trapezoid; the angle between the upper base of the cross section of the large right-angled trapezoid and the oblique side of the cross section is obtuse angle I; the angle between the upper base of the cross section of the small right-angled trapezoid and the oblique side of the cross section is obtuse angle II; obtuse angle I and obtuse angle II have the same inclination angle; the length of the upper base of the cross section of the large right-angled trapezoid is less than the length of the upper base of the cross section of the small right-angled trapezoid.

2. The split bearing unit according to claim 1, characterized in that: The split bearing housing and the split bearing box are clearance-fitted, and the split bearing box can be self-aligned in any direction by ±2.5° through the swinging fit of the limiting pin in the recess; the limiting pin is fixed on the top surface of the upper bearing box, and the recess is correspondingly set on the top of the upper bearing housing.

3. The split bearing unit according to claim 1, characterized in that: Both the upper and lower bearing housings are semi-circular structures, connected to form a circular inner cavity for assembling a split bearing housing. Each semi-circular bearing housing has a fixing hole on its connecting end face at both ends, with the fixing holes of the two bearing housings corresponding to each other. The upper and lower bearing housings are connected by fixing holes and connecting bolts. Each semi-circular bearing housing also has a positioning hole on its connecting end face at both ends, with the two positioning holes on the two connecting end faces on the same side. The positioning holes of the two bearing housings are corresponding to each other and are used for mounting. The lower bearing housing is equipped with a cylindrical pin for error-proof positioning. The cylindrical pin has an interference fit with the positioning hole of the lower bearing housing and a small clearance fit with the positioning hole of the upper bearing housing. The connecting end faces at both ends of the lower bearing housing extend radially outward, and the extended portion and the connecting end faces continue to form two horizontal assembly surfaces. Each assembly surface is also provided with two positioning bolt mounting holes for connecting external components, two set screw holes for adjusting the position and height of the lower bearing housing, and one positioning pin hole for positioning in conjunction with the user positioning pin. All openings on the two assembly surfaces are symmetrically arranged. The assembly surfaces are conformally arranged along the non-load-bearing position outside the openings to form an irregular outer contour.

4. The split bearing unit according to claim 1, characterized in that: In the upper and lower bearing housings, each individual bearing housing has two symmetrical positioning holes on its connecting end face, which are symmetrical along the center line. The symmetrical positioning holes of the two bearing housings are correspondingly set for upper and lower misalignment positioning. Corresponding marking grooves are set on the same side of the upper and lower bearing housings for front and rear misalignment positioning. A temperature measuring threaded hole is set at the bottom of the lower bearing housing, and the depth of the temperature measuring threaded hole reaches the end face of the outer ring of the split cylindrical roller bearing.

5. The split bearing unit according to claim 1, characterized in that: The inner assembly, consisting of an inner ring, a cage, and cylindrical rollers, is spaced apart from the split bearing housing end cover. The inner assembly has axial displacement space within the split bearing housing and does not interfere with it. The outer surface of the semi-inner ring is provided with a first locking groove and a second locking groove, which are located on both sides of the raceway of the semi-inner ring. The semi-locking rings cooperate with the locking grooves. The two semi-locking rings in the first locking groove are connected by screws to form the first locking ring, and the two semi-locking rings in the second locking groove are connected by screws to form the second locking ring. A first groove is provided on the first locking groove, and a second groove is provided on the second locking groove. The widths of the first groove and the second groove are different.

6. The split bearing unit according to claim 5, characterized in that: The inner diameter of the double-half inner ring joint has a notch; the double-half outer ring joint has a trapezoidal structure; the inner end face of the half clamping ring is provided with a positioning platform, and the outer cylindrical surface of the positioning platform is higher than the raceway of the half inner ring; the position of the first clamping ring joint is 90° away from the position of the double-half inner ring joint, and the position of the second clamping ring joint is 90° away from the position of the double-half inner ring joint.

7. The split bearing unit according to claim 1, characterized in that: The double half-cage includes two half-cages, each half-cage including a half-cage base and a half-cage cover, the half-cage base and half-cage cover being a separate self-riveting connection; the double half-cages are connected by a connecting piece, the connecting piece having several through holes, the through holes having screws for fixing the double half-cages together.

8. The split bearing unit according to claim 1, characterized in that: The split bearing housing is assembled onto the shaft via end caps at both ends. Sealing rings are provided at the contact points between the end caps and the shaft. Each sealing ring consists of two semi-sealing rings, which cooperate to form a circular sealing ring.

9. The split bearing unit according to claim 8, characterized in that: The outer surfaces of the two end caps are provided with sealing ring grooves, and the sealing rings are assembled in the sealing ring grooves; a fixing plate is provided on the outer side of the sealing ring grooves, and the fixing plate is fixed to the end caps of the bearing housing by fixing bolts; the sealing rings are axially interference-fitted with the fixing plate; the fixing plate is composed of two half-fixing plates, which cooperate to form a circular fixing plate, and the interface formed at the joint of the two half-fixing plates is the fixing plate interface, and the interface formed at the joint of the two half-sealing rings is the sealing ring interface, which is set at a 90° interval from the fixing plate interface; the sealing ring is composed of a body part and a sealing part, the body part extends towards the inner diameter side to form the sealing part, and the sealing part includes a first sealing lip and a second sealing lip, the first sealing lip is in contact with the shaft, and the second sealing lip is interference-fitted with the shaft.

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