Full complement roller bearing star wheel lubricating device and method thereof

Abstract

The invention discloses a full complement roller bearing star wheel lubricating device which comprises a planet wheel shaft and a planet wheel assembled on the periphery of the planet wheel shaft through a bearing, and the bearing is a limit full complement roller bearing and comprises two end baffles and a roller arranged between the two end baffles. The end baffle is provided with an end plate inner hole along the middle axis, and one end of the end baffle is provided with an end plate spigot. The end plate seam allowance is tightly matched with the inner hole of the planet wheel; an inner hole resistance increasing groove is formed in the inner wall of the end plate inner hole. An oil bath partition plate is arranged between every two adjacent rows of rollers; the planet wheel shaft is provided with a longitudinal through oil channel and a plurality of rows of transverse oil holes communicated with the longitudinal through oil channel. Therefore, the full complement roller bearing star wheel lubricating device adapts to severe working conditions of coal machine equipment, a transmission system is low in speed and heavy in load, and the full complement roller bearing star wheel lubricating device has the long-lasting lubricating characteristic.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of full roller bearing star wheel lubricating device and its method, belong to coal mining machinery technical field. BACKGROUND

[0002] In certain coal machine low-speed heavy-load multi-planetary gear transmission star wheel mechanism, the radial dimension is very compact, sometimes often adopt double-row full roller bearing without outer (or without inner) ring, the lubricating device design of this type of bearing is basically conventional design, and other types of bearing lubricating mechanism is similar, no particularity (see appendix Figure 1 , appendix Figure 2 ).

[0003] In the planetary gear transmission system, the inner ring 10 is barrel-shaped annular structure, which is precisely fitted and fixed on the box by itself and the box, and the structure forms a large oil pool, which can basically ensure that the oil level of lubricating oil 13 is not less than 1 / 3 of the diameter of the inner ring tooth root circle during normal operation. The power of the transmission system comes from the upper transmission, which transmits power to the sun gear 12. The sun gear and the 3 (or 4, or 5) planetary gears 1 mesh. Assuming that the sun gear rotates clockwise, the planetary gears are fixed on the planetary gear carrier 6, and the planetary gears mesh with the stationary inner ring, which causes the planetary gears to not only rotate counterclockwise around the axial center line of the planetary gear shaft 4, but also rotate clockwise around the common axial center line of the sun gear and the inner ring, and the planetary gears also revolve. The lubrication of the double-row full roller bearing 2 star wheel device without outer (or inner) ring forms an open 3 (or 4, or 5) local small cavity of the star wheel, which is a small oil tank. When each star wheel small oil tank rotates to the bottom of the large oil pool, the lubricating oil enters the internal cavity of the bearing through the longitudinal through oil passage of the planetary gear shaft, the transverse oil hole, the annular oil groove of the planetary gear shaft neck, and the oil hole of the full bearing inner ring (the outer ring of the double-row full roller bearing star wheel device without inner ring does not need oil hole to enter directly). Or the lubricating oil can also enter the internal cavity of the bearing through the gap (δ1-1, δ1-2, δ2-1, δ2-2) between the two ends of the planetary gear and the planetary gear carrier, the gap between the retainer 3, the roller retainer 3-1 and the inner ring of the bearing, and the gap between the rollers of the bearing. The two oil inlet directions coexist. The gear oil quickly fills the star wheel small oil tank, and when the star wheel small oil tank rotates away from the liquid surface of the large oil pool, the lubricating oil filled in the gaps of the star wheel small oil tank with relative motion releases quickly along the oil passage. In the figure, only one of the circumferentially distributed star wheel devices is shown to simplify the expression. Double-headed arrows represent the clockwise rotation of the sun gear, and single-headed arrows represent the general direction of the lubricating oil flow (it may also be in the opposite direction or other combinations of complex directions).

[0004] The power of the lubricating device comes from the torque transmitted by the motor; the liquid lubricating oil has almost no power, but the torque transmitted by the motor drives the open star wheel device (referring to the relatively smooth oil passage gap and space inside the star wheel device) to rotate to the bottom of the gear ring of the large oil tank to quickly fill the oil when the lubricating oil surface, and when the rotation is away from the lubricating oil surface, the lubricating oil in the open star wheel device quickly leaks under the action of gravity and centrifugal force.

[0005] The lubricating device of the double-row full complement roller bearing without outer (or inner) ring has obvious disadvantages, which is very unfavorable when the oil level in the oil tank is low and the oil quantity is small (sometimes the large oil pool of the star wheel transmission mechanism leaks), and it is difficult to work normally for a long time under the harsh working condition of the oil tank with little oil, and such working condition may exist for a long time. The bearing in the lubricating device is a standard part, generally with three oil holes with a diameter of 3-5 mm (for coal machine equipment) uniformly distributed, which belongs to standardized design and has relatively large oil passage gap; at the same time, the gap between the two ends of the planetary gear and the planetary gear carrier, the gap between the retainer, the roller retainer and the bearing inner ring, and the oil passage gap between the rollers of the bearing are large (2.5-10 mm), which leads to small oil inlet and oil leakage resistance and short lubricating oil storage time in the gaps.

[0006] Summary: The above-mentioned star wheel lubricating device of the double-row full complement roller bearing without outer (or inner) ring belongs to conventional design, the small oil tank of the star wheel is an open small cavity, the lubricating passage has relatively large oil passage gap, and the lubricating feature is open, fast-in and fast-out type urgent lubrication with wide area and fast oil inlet and multi-point fast oil leakage; the lubricating effect is obviously not as good as that of the star wheel device lubricated by the pure roller type full complement roller bearing when the oil quantity in the oil tank is not sufficient. SUMMARY

[0007] The purpose of the present application is to provide a full complement roller bearing star wheel lubricating device to solve the disadvantages of the existing star wheel device of the double-row full complement roller bearing without outer (or inner) ring commonly used in coal machine equipment. It is suitable for harsh working conditions of coal machine equipment and low-speed heavy load of transmission system, and has long-lasting lubricating characteristics.

[0008] To achieve the above technical purposes, the present application will adopt the following technical solutions:

[0009] A full complement roller bearing star wheel lubricating device, comprising a planetary gear shaft and a planetary gear assembled on the periphery of the planetary gear shaft through a bearing, wherein the bearing is a full complement roller bearing, comprising two end plates and rollers arranged between the two end plates;

[0010] The end plate is provided with an end plate inner hole along the middle axis, and one end of the end plate is provided with an end plate stop; the end plate stop is tightly matched with the inner hole of the planetary gear; the end plate is sleeved on the periphery of the planetary gear shaft through the end plate inner hole, and the inner wall of the end plate inner hole is provided with an inner hole resistance increasing groove penetrating through the two end surfaces of the end plate;

[0011] The rollers are arranged in several rows along the axial direction of the planetary shaft; each row of rollers includes several rollers uniformly distributed along the circumferential direction of the planetary shaft;

[0012] The two adjacent rows of rollers are arranged one by one in a corresponding manner, and the axial lines of the two rollers in the corresponding positions are collinear;

[0013] Each of the two adjacent rows of rollers is provided with an oil bath partition plate.

[0014] The planetary shaft is provided with a longitudinal through oil channel and several rows of transverse oil holes in communication with the longitudinal through oil channel;

[0015] In each row of transverse oil holes, the two rows of transverse oil holes on the outer side are arranged in positions corresponding to the two end baffle plates, and the remaining rows of transverse oil holes are arranged in positions corresponding to the oil bath partition plates one by one.

[0016] The axial lines of the transverse oil holes included in each row of transverse oil holes are arranged one by one in positions corresponding to the tangent lines between the two adjacent rollers in each row of rollers, and the axial lines of the transverse oil holes in the corresponding positions and the tangent lines between the two adjacent rollers are longitudinally projected to coincide.

[0017] Preferably, each transverse oil hole included in each row of transverse oil holes is in communication with the position of the oil bath partition plate through a journal annular oil groove.

[0018] Preferably, the diameter d 6-1 of the longitudinal through oil channel 6-2 satisfies: d 6-1 ≈2×d 6-2 , and the groove depth t6 of the journal annular oil groove is approximately 0.5-1mm.

[0019] Preferably, the end plate stop end face is uniformly provided with several end plate oil passage grooves.

[0020] Preferably, the inner hole resistance increasing groove is arranged in a threaded manner, and the depth δ 7-1 of the inner hole resistance increasing groove satisfies: δ 7-1 ≤δ 3-2 ; in the formula: δ 3-2 represents the average gap between the end plate inner hole and the outer diameter of the planetary shaft.

[0021] Preferably, the oil bath partition plate includes a partition plate body; the two plate surfaces of the partition plate body are both distributed with several partition plate oil passage grooves, and the partition plate oil passage grooves on the two plate surfaces are arranged in a staggered manner.

[0022] Preferably, the width t of the partition plate oil passage groove is approximately 2h, and the thickness δ8 is approximately h / 5; h represents the thickness of the oil bath partition plate.

[0023] Preferably, the diameter d 6-1, the diameter of the transverse oil hole d 6-2 , the average gap δ between the depth t6 of the journal ring oil groove, the outer circle of the oil bath partition and the inner hole of the planet wheel 3-4 satisfies: d 6-1 > d 6-2 > t6 > δ 3-4 .

[0024] Preferably, the average gap δ between the end face of the end plate stopper and the outer end face of the outermost row of rollers 3-3 , the average gap δ between the inner hole of the end baffle and the outer diameter of the planet wheel shaft 3-2 , the average gap δ between the large end face of the end baffle and the same side inner plane boss plane of the wheel carrier 3-1 satisfies: δ 3-3 > δ 3-2 > δ 3-1 .

[0025] Another technical purpose of the present application is to provide a method for lubricating the above-mentioned full-roller bearing planet wheel device, in which, when each planet wheel oil tank rotates to the bottom of the large oil pool, lubricating oil slowly enters the internal cavity of the extreme full-roller bearing through the longitudinal through oil channel, the transverse oil hole, the journal ring oil groove, and the partition oil groove on the front and back of the oil bath partition and the end plate partition oil groove;

[0026] When the planet wheel oil tank rotates away from the liquid surface of the large oil pool, the lubricating oil that is fully immersed in the lubricating points with relative motion in the gaps of the planet wheel oil tank is slowly released along the oil passage gap of the inner hole resistance groove of the end baffle, realizing slow-in and slow-out persistent lubrication;

[0027] The planet wheel oil tank is specifically a quasi-sealed local small sealed cavity formed by the tight fit between the end plate stopper and the inner hole of the planet wheel.

[0028] Based on the above technical purposes, compared with the prior art, the present application has the following advantages:

[0029] 1. The full-roller bearing planet wheel lubricating device disclosed by the present application can realize continuous and long-term lubrication when the oil tank is not full, greatly improving the reliability of the device, and has high popularization value in the field of mine equipment that requires low speed and continuous and long-term lubrication.

[0030] 2. The present application utilizes the multi-row arrangement effect of the extreme full-roller bearing, which makes it easier to design multi-row lubrication grooves.

[0031] 3, The star wheel small oil tank formed by the application is a quasi-sealed small sealed cavity, the lubricating channel and the oil passing gap are designed in a sequential hierarchy, the gap size values of the oil inlet and outlet channels gradually change from large to small and from wide to narrow, the lubricating oil passing route is unidirectional, important lubricating oil passing micro gaps for slow oil inlet and slow oil outlet are specially designed in the star wheel device, the oil outlet is designed to be contracted and increased in resistance to increase the oil discharge resistance, and the lubricating feature is quasi-closed, slow-inlet and slow-outlet type persistent lubrication with slow oil inlet and slow oil discharge in the shaft hole and the resistance increasing hole. The lubricating effect when the oil tank is not full is better than that of the existing lubricating device of the double-row full complement roller bearing without an outer ring or an inner ring. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic view of the lubricating device of the double-row full complement roller bearing star wheel mechanism without an outer ring, in which: (a) shows a front view of the lubricating device of the double-row full complement roller bearing star wheel mechanism without an outer ring, and (b) shows an A-A sectional view in (a);

[0033] Figure 2 is a structural schematic view of the lubricating device of the double-row full complement roller bearing star wheel mechanism without an inner ring, in which: (a) shows a front view of the lubricating device of the double-row full complement roller bearing star wheel mechanism without an inner ring, and (b) shows an A-A sectional view in (a);

[0034] Figure 1 、 Figure 2 In which: 1, planetary gear; 2-1, double-row full complement roller bearing without an outer ring; 2-2, double-row full complement roller bearing without an inner ring; 3, retainer; 3-1, bearing baffle; 4, planetary gear shaft; 51, spacer; 6, planetary gear carrier; 7, bolt; 8, lock washer; 9, pressure ring; 10, inner ring gear; 10-1, pad; 11, distance sleeve; 12, sun gear; 13, lubricating oil;

[0035] δ 1-1 represents the gap (range value) between the upper end face of the planetary gear and the upper side inner plane boss end face of the planetary gear carrier; 1-2 represents the gap (range value) between the lower end face of the planetary gear and the lower side inner plane of the planetary gear carrier;

[0036] Figure 3 is a structural schematic view of the lubricating device of the full complement roller bearing star wheel mechanism, in which: (a) shows a front view of the lubricating device of the full complement roller bearing star wheel mechanism; (b) shows an A-A sectional view in (a); and (c) shows an enlarged structural schematic view of part B in (b);

[0037] Figure 3In: 1. Planetary gear; 2. Extreme full complement roller bearing; 3. End baffle; 4. Planetary gear shaft; 5. Oil bath partition; 6. Planetary gear carrier; 7. Bolts; 8. Locking washer; 9. Pressure ring; 10. Internal gear ring; 11. Distance sleeve; 12. Sun gear; 13. Lubricating oil;

[0038] δ 3-1 Indicates the average clearance (range value) between the large end face of the end baffle and the inner boss plane on the same side of the wheel frame;

[0039] δ 3-2 Indicates the average clearance (range value) between the inner hole of the end baffle and the outer diameter of the planetary gear shaft;

[0040] δ 3-3 Indicates the average clearance (range value) between the end face of the end plate stop and the outer end face of the outermost row of rollers;

[0041] δ 3-4 Indicates the average clearance (range value) between the inner hole of the oil bath partition and the planetary gear shaft journal or the outer circle of the oil bath partition and the inner hole of the planetary gear;

[0042] Figure 4 It is a structural diagram of a full complement roller bearing;

[0043] Figure 4 Middle: 1. Planetary gear; 2. Extreme full complement roller bearing; 21. Internal space of roller bearing; 4. Planetary gear shaft;

[0044] D4 represents the roller diameter; L4 represents the roller length; δ 4-1 Indicates the roller clearance on the center line of adjacent rollers; δ 4-2 Indicates the gap between the roller and the inner hole of the planetary gear on the extension line of the connecting line between the centers of the roller and the planetary gear shaft;

[0045] Figure 5 It is a schematic diagram of the structure of the planetary gear;

[0046] Figure 5 Middle: 1, planetary gear; 1-1, planetary gear inner hole; 1-2, planetary gear end faces; D5 represents the planetary gear inner hole diameter; L5 represents the planetary gear width;

[0047] Figure 6 It is a schematic diagram of the structure of the planetary gear shaft;

[0048] Figure 6 Middle: 4, planetary gear shaft; 4-1, planetary gear shaft journal; 4-2, planetary gear shaft longitudinal through oil channel; 4-3, planetary gear shaft transverse oil hole; 4-4, planetary gear shaft journal annular oil groove; d6 represents the planetary gear shaft outer diameter; d 6-1 Indicates the diameter of the longitudinal oil passage of the planetary gear shaft; d 6-2D6 represents the diameter of the oil hole of the planet shaft; t6 represents the depth of the annular oil groove of the planet shaft neck ring;

[0049] Figure 7 is a structural diagram of the end baffle;

[0050] Figure 7 3, end baffle; 3-1, end plate oil passage groove; 3-2, end plate large end face; 3-3, end plate stopper outer circle; 3-4, end plate stopper end face; 3-5, inner hole resistance increasing groove; D7 represents the inner hole diameter of the end baffle; d7 represents the stopper outer diameter of the end baffle; t represents the width of the end plate oil passage groove; δ 7-1 represents the inner hole resistance increasing groove depth; δ 7-2 represents the depth of the end plate oil passage groove;

[0051] Figure 8 is a structural diagram of the oil bath partition plate;

[0052] Figure 8 5, oil bath partition plate; 5-1, partition plate oil passage groove; 5-2, partition plate end face; 5-3, partition plate outer circle; 5-4, partition plate inner hole;

[0053] D8 represents the inner circle diameter of the oil bath partition plate; d8 represents the outer circle diameter of the oil bath partition plate; h represents the thickness of the oil bath partition plate; t represents the width of the partition plate oil passage groove; δ8 represents the depth of the partition plate oil passage groove.

[0054] Figure 9 represents the front view of the full roller bearing star wheel lubrication device (labeled lubricating oil flow arrows). DETAILED DESCRIPTION

[0055] 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 a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. Unless otherwise specified, the relative arrangement, expressions and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. The technology, methods and equipment known to those of ordinary skill in the related art can not be discussed in detail, but should be considered as part of the specification in appropriate cases. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations).

[0057] The full complement roller bearing star wheel lubrication device of the present invention is different from the existing double row full complement roller bearing star wheel device without outer (or inner) ring (see attached Figure 1 , Attachment Figure 2 ), the difference is that it provides an extreme full complement roller bearing 2, which is composed only of rollers and does not have the bearing inner ring, outer ring and cage equipped with conventional bearings. To this end, the present invention specifically designs its related accessories.

[0058] Specifically, if Figure 3 As shown, the full complement roller bearing planetary gear lubrication device of the present invention includes a planetary gear shaft 4 and a planetary gear 1 assembled on the periphery of the planetary gear shaft 4 through a bearing. The bearing is an extreme full complement roller bearing 2, including two end baffles 3 and a roller arranged between the two end baffles 3;

[0059] The end baffle 3 is provided with an end plate inner hole along the central axis, and an end plate stop is provided at one end of the end baffle 3; the end plate stop is tightly matched with the inner hole of the planetary gear 1, and the stop end surface of the end plate stop is evenly provided with a plurality of end plate oil grooves; the end baffle 3 is sleeved on the periphery of the planetary gear shaft 4 through the end plate inner hole, and the inner wall of the end plate inner hole is provided with an inner hole resistance increasing groove that passes through the two end surfaces of the end baffle 3. In the accompanying drawings, one end of the inner hole resistance increasing groove of the present invention passes through one of the end surfaces of the end baffle 3 [for example Figure 7 The left end face of (b)], the other end of the inner hole resistance increasing groove passes through the other end face of the end baffle 3 [for example Figure 7 The inner hole resistance increasing groove is arranged as a whole in a threaded shape (in the present invention, it is arranged as a fine pitch thread), and the depth of the inner hole resistance increasing groove δ 7-1 Satisfaction: δ 7-1 ≤δ 3-2 Where: δ 3-2 Represents the average gap between the inner hole of the end plate and the outer diameter of the planetary shaft 4.

[0060] Each roller is arranged in several rows along the axial direction of the planetary wheel shaft 4; each row of rollers comprises several rollers uniformly distributed along the circumferential direction of the planetary wheel shaft 4; two adjacent rows of rollers are arranged one by one in a corresponding position, and the axes of the two rollers in the corresponding position are collinear;

[0061] Each of two adjacent rows of rollers is respectively provided with an oil bath partition plate 5; the oil bath partition plate 5 comprises a partition plate body; the two plate surfaces of the partition plate body are respectively provided with a plurality of partition plate oil channels, and the partition plate oil channels on the two plate surfaces are arranged alternately. The width t of the partition plate oil channel is approximately equal to 2h, and the thickness δ8 is approximately equal to h / 5; h represents the thickness of the oil bath partition plate 5.

[0062] The planetary wheel shaft 4 is provided with a longitudinal through oil channel and a plurality of rows of transverse oil holes respectively communicating with the longitudinal through oil channel;

[0063] In each row of transverse oil holes, the two rows of transverse oil holes on the outer side are respectively arranged in positions corresponding to the two end baffle plates 3, and the remaining rows of transverse oil holes are respectively arranged in positions corresponding to the oil bath partition plates 5 one by one; the axes of the transverse oil holes included in each row of transverse oil holes are arranged one by one in positions corresponding to the tangent lines between the two adjacent rollers in each row of rollers, and the axes of the transverse oil holes in the corresponding positions and the tangent lines between the two adjacent rollers are longitudinally projected to coincide.

[0064] The diameter d of the longitudinal through oil channel 6-1 The diameter d of the transverse oil hole 6-2 The average gap δ between the depth t6 of the journal annular oil groove, the outer circle of the oil bath partition plate 5 and the inner hole of the planetary wheel 3-4 Satisfies: d 6-1 > d 6-2 t6 > δ 3-4 The average gap δ between the end face of the end plate stopper and the outer end face of the outermost row of rollers 3-3 The average gap δ between the inner hole of the end baffle plate 3 and the outer diameter of the planetary wheel shaft 4 3-2 The average gap δ between the large end face of the end baffle plate 3 and the inner plane convex platform on the same side of the wheel carrier 3-1 Satisfies: δ 3-3 > δ 3-2 > δ 3-1 .

[0065] Therefore, the present application utilizes the multi-row arrangement effect of the full roller bearing to more easily design a plurality of lubricating grooves on the oil bath partition plate 5.

[0066] The end plate stop and the inner bore of the planetary gear 1 fit tightly together, forming a quasi-sealed, localized, small sealed cavity (or small oil tank) within the inner bore of the planetary gear. Resistance-enhancing grooves are designed within the inner bores of the end baffles 3 at both ends of the planetary gears. When each planetary gear small oil tank rotates to the bottom of the large oil pool, lubricating oil slowly enters the internal cavity of the fully loaded roller bearing through the longitudinal oil passages of the planetary gear shaft 4, the transverse oil holes, the annular oil grooves on the planetary gear shaft journal, the oil grooves on the front and back sides of the oil bath baffles, and the oil passage grooves on the small ends of the end baffles. When the planetary gear small oil tank rotates away from the liquid surface of the large oil pool, the lubricating oil that has filled the relative motion lubrication points in the various gaps of the planetary gear small oil tank is slowly released along the oil passage gaps in the resistance-enhancing grooves within the inner bores of the end baffles, achieving slow-in, slow-out, and long-lasting lubrication. The double-line arrow in the figure indicates clockwise rotation of the sun gear, and the single-line arrow indicates the general direction of the lubricating oil flow, which tends to be unidirectional.

[0067] Since the transmission system of the planetary gear mechanism here has a low speed, it is feasible to adopt a slow-feed oil lubrication structure with targeted optimization design; the development and application of multiple coal-forming machine equipment have proved that the slow-feed oil lubrication structure of the new full-component roller bearing planetary gear device can fully meet the minimum lubrication requirements in harsh working conditions with low oil content.

[0068] In this invention, through research and analysis, a full complement roller bearing star wheel lubrication device is summarized, and the optimization method or preferred parameters of the lubrication structural elements of each component are described below:

[0069] (1) Extreme full complement roller bearings

[0070] Attachment Figure 3 In the figure, the rollers included in the extreme full complement roller bearing 2 are arranged in a total of 4 rows. Therefore, by utilizing the multi-row arrangement effect of the extreme full complement roller bearing 2, it is easier to design multiple rows of lubrication grooves (for example, in the figure, the planetary shaft 4 is arranged with 5 rows of transverse oil holes 4-3, so that the lubricating oil introduced from the bottom of the large oil pool through the longitudinal through oil channel 4-2 can enter the internal cavity of the extreme full complement roller bearing through each transverse oil hole 4-3). The lubrication channels are connected in all directions, and the lubricating oil penetrates all holes and fully penetrates; the roller gap δ on the center line of adjacent rollers 4-1 , the clearance δ between the roller and the inner hole of the planetary gear on the extension line of the connecting line between the roller and the planetary gear shaft center 4-2 The existence of is extremely important. One of its functions is to easily form a lubricating oil film to ensure the long-term reliable and normal operation of the bearing (see the attached Figure 4 ).

[0071] (2) Planetary gear

[0072] Each set of star wheel device contains a planetary gear 1, generally 3 (or 4, 5) groups, is the main part of the quasi-sealed small sealing cavity; the inner hole of the planetary gear is formed by precision honing, and the honing lines are easy to attach oil film, and the honing line depth is generally ≤0.4 microns (basically equivalent to the machining roughness of the inner hole surface of the planetary gear); the end plate stopper is tightly matched with the inner hole of the planetary gear, preventing the lubricating oil entering the planetary gear from flowing out along the matching surface, forming a quasi-sealed local small sealing cavity (i.e. small oil tank) (see attached Figure 5 ) for details.

[0073] (3) Planetary gear shaft

[0074] Each set of star wheel device contains a planetary gear shaft 1, generally 3 (or 4, 5) groups; the longitudinal through oil channel (1) of the planetary gear shaft, the transverse oil hole (the number of transverse oil holes is one more than the number of roller rows) and the journal annular oil groove are the main oil inlet channels for lubricating the full-roller bearing star wheel device; generally, the longitudinal through oil channel diameter d 6-1 , the transverse oil hole diameter d 6-2 satisfy: d 6-1 ≈2×d 6-2 , the journal annular oil groove depth t6≈0.5-1mm (see attached Figure 6 ) for details.

[0075] (4) End baffle

[0076] Each set of star wheel device contains an end baffle 2, generally 3 (or 4, 5) groups; the end baffle has a small end at one end and is provided with an end plate stopper, and has a large end at the other end; the end plate stopper and the inner hole of the planetary gear are tightly matched, the end plate stopper is fixed in the inner hole at both ends of the planetary gear, which is a key part of forming a quasi-closed small oil tank for the planetary gear, and is one of the most core parts of the technical invention (see attached Figure 7 ) for details.

[0077] The end plate stopper end face is uniformly provided with a plurality of end plate oil passage grooves, in the present invention, the number of end plate oil passage grooves is 3 or 4, which are evenly distributed along the radial direction, the width t and the depth δ 7-2 of the end plate oil passage groove can be selected according to the width and depth of the oil bath partition plate oil passage groove.

[0078] (5) Oil bath partition plate

[0079] The number of oil bath partitions required is determined by the number of star wheel device groups and the number of full complement roller bearing arrangement rows; generally, a star wheel device has 3 groups or 4 groups or 5 groups, and the limit full complement roller bearing arrangement row number is generally 4 rows or 5 rows or 6 rows; the number of oil bath partitions in each group of star wheel devices is equal to the number of roller rows minus 1 (for example, in the drawings, the number of roller rows is 4, so the number of oil bath partitions is 3); the width t of the oil passage groove of the oil bath partition is generally about 2 times the thickness of the oil bath partition (t≈2h), and is uniformly distributed in 3 or 4 radial directions on the front and back surfaces; the depth δ8 of the oil passage groove of the oil bath partition is generally equal to 1 / 5 of the thickness (δ8≈h / 5) (see the drawings in detail Figure 8 ).

[0080] The oil bath partition separates the adjacent two rows of rollers to avoid hard contact friction and extrusion of the roller end face; at the same time, the relatively large internal space between the rollers of the limit full complement roller bearing is separated along the rows, and only a small gap is used for communication to slow down the oil inflow and discharge flow rate; generally, there is no obvious relative movement between the rollers in each row and between the rollers; however, there is relative movement between the adjacent rollers in each row; there may be relative movement between the roller end faces and the oil bath partition side surfaces in each row of rollers; where there is contact relative movement, there will be friction, and all of them need to be lubricated; the places that need to be lubricated must have oil storage space or oil passage gap.

[0081] After installation, the optimized design and best matching gap value must be retained (see the drawings in detail Figure 3 、 4 , 7) :

[0082] 1) δ 3-1 …The average gap (range value) between the large end face of the end plate and the inner plane convex platform on the same side of the carrier

[0083] Once contact occurs, it acts as a protective pad for hard surface dry grinding between the planetary gear and the planetary gear carrier 6, so the average gap δ 3-1 between the large end face of the end plate and the inner plane convex platform on the same side of the carrier must meet the requirements.

[0084] 2) δ 3-2 …The average gap (range value) between the inner hole of the end plate and the outer diameter of the planetary gear shaft

[0085] The end plate stopper and the planetary gear inner hole are tightly matched to form a quasi-sealed local small sealed cavity; the inner hole of the end plate at both ends of the planetary gear is designed with an inner hole resistance groove, which is designed in a threaded shape to achieve resistance; so that the present application only has a small gap between the end plate inner hole and the planetary gear shaft outer diameter, which has the possibility of oil discharge; due to the inner hole resistance groove designed at this position, the resistance of the micro gap exists, which slows down the backflow speed of the lubricating oil leaving the micro gap, increases the storage residence time of the lubricating oil in each micro gap in the small oil tank, and thus can effectively ensure the good lubrication of the new full complement roller bearing star wheel device.

[0086] 3)δ 3-3 …average gap between end plate stop end face and outer end face of outermost row of rollers (range value)

[0087] average gap δ 3-3 …to reduce the friction between the end plate stop end face and the outer end face of the outermost row of rollers, and to slow down the lubrication pressure; at the same time, to form an oil lubrication space.

[0088] 4)δ 3-4 …average gap between oil bath baffle inner hole and planetary wheel shaft journal or between oil bath baffle outer circle and planetary wheel inner hole (range value)

[0089] average gap δ 3-4 …is a specially designed internal lubrication oil passage micro gap, which functions to communicate the lubrication space and oil passage gap between each adjacent row of rollers along the axial direction of the planetary wheel shaft and the radial direction of the two end faces of the oil bath baffle, and is an important lubrication oil passage micro gap for slow oil entry and slow oil exit of the internal lubrication structure of the full roller bearing planetary gear device.

[0090] 5)δ 4-1 …gap between rollers on the center line of adjacent rollers (range value), δ 4-2 …gap between rollers and planetary wheel inner hole on the extension line of the center line connecting the rollers and the planetary wheel shaft (range value)

[0091] gap between rollers on the center line of adjacent rollers δ 4-1 , gap between rollers and planetary wheel inner hole on the extension line of the center line connecting the rollers and the planetary wheel shaft δ 4-2 The existence of the gap δ is extremely important, one of its functions is to easily form a lubricating oil film on the inner raceway (planetary wheel shaft journal) and outer raceway (planetary wheel inner hole) of the roller bearing, ensuring long-term reliable and normal operation of the bearing.

[0092] 6)δ 7-1 …depth of inner hole resistance groove

[0093] The shape of the inner hole resistance groove of the end baffle is an open type fine thread with very small pitch and very long thread, and the depth of the inner hole resistance groove δ 7-1 ≤ δ 3-2 (the average gap between the inner hole of the end baffle and the outer diameter of the planetary wheel shaft); its function is that when the small oil tank of the planetary gear rotates away from the liquid surface of the large oil pool, the lubricating oil filled and soaked in the lubricating points with relative motion in the gaps of the small oil tank of the planetary gear is slowly released along the oil passage gap and resistance thread line of the inner hole resistance groove of the end baffle. Due to the resistance and slowing down effect of the micro gap and resistance thread at this position, the backflow speed of the lubricating oil leaving the micro gap is slowed down, and the storage and residence time of the lubricating oil in each micro gap inside the small oil tank is increased, thus effectively ensuring the slow and long-term lubrication of the full roller bearing planetary gear device.

[0094] Summary: "A kind of full roller bearing star wheel lubricating device" belongs to the design of pertinence, the small oil tank of star wheel is quasi-sealed small sealing cavity, lubricating channel, oil gap order level design, oil inlet and outlet channel gap size value from big to small, shape from wide to narrow gradually changes, lubricating oil route unidirectionality is very clear;For example, the size value d 6-1 (Planet wheel shaft longitudinal through oil channel diameter)>d 6-2 (Planet wheel shaft transverse oil hole diameter)>t6(Planet wheel shaft journal ring oil groove depth)>delta 3-4 (The average gap between the oil bath partition hole and the planet wheel shaft journal or the average gap between the oil bath partition outer circle and the planet wheel inner hole), delta 3-3 (The average gap between the end plate stop end face and the outer end face of the outermost row of rollers)>delta 3-2 (The average gap between the end baffle inner hole and the planet wheel shaft outer diameter)>delta 3-1 (The average gap between the end baffle large end face and the inner plane convex platform plane of the same side of the wheel carrier).

[0095] In the star wheel device, the oil diffusion area becomes larger and larger, which makes it easier to continuously and durably lubricate the bulk characteristics of the full roller bearing; In addition, important lubricating oil micro-gaps are specially designed for slow oil inlet and slow oil outlet, and the oil outlet is designed to be contracted and increased in resistance, increasing the oil discharge resistance. The lubrication feature is a quasi-closed, slow-in and slow-out type of durable lubrication with slow oil inlet and increased resistance hole gap slow oil discharge. When the oil tank oil volume is not sufficient, the lubrication effect of the pure roller type full roller bearing star wheel device is much better than that of the above-mentioned double-row full roller bearing lubricating device without outer (or inner) ring.

[0096] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A full complement roller bearing planetary gear lubrication device, comprising a planetary gear shaft and a planetary gear assembled on the periphery of the planetary gear shaft through a bearing, characterized in that: The bearing is an extreme full complement roller bearing, comprising two end baffles and a roller arranged between the two end baffles; The end baffle is provided with an end plate inner hole along the central axis, and an end plate stop is provided at one end of the end baffle; the end plate stop is tightly fitted with the inner hole of the planetary gear; the end baffle is sleeved on the outer periphery of the planetary gear shaft through the inner hole of the end plate, and the inner wall of the inner hole of the end plate is provided with an inner hole resistance increasing groove that passes through both end surfaces of the end baffle; The rollers are arranged in a plurality of rows along the axial direction of the planetary gear shaft; each row of rollers includes a plurality of rollers evenly distributed along the circumference of the planetary gear shaft; The rollers of two adjacent rows are arranged in a one-to-one correspondence, and the axes of the two rollers at corresponding positions are collinear; An oil bath partition is installed between two adjacent rows of rollers; The planetary gear shaft is provided with a longitudinal through oil passage and a plurality of rows of transverse oil holes respectively connected to the longitudinal through oil passage; of each row of transverse oil holes, the two outer rows of transverse oil holes are respectively arranged corresponding to the positions of the two end baffles, and the remaining rows of transverse oil holes are respectively arranged corresponding to the positions of the oil bath baffles; The axes of the transverse oil holes in each row of transverse oil holes are arranged in one-to-one correspondence with the tangent line between two adjacent rollers in each row of rollers, and the axes of the transverse oil holes at corresponding positions coincide with the tangent line between two adjacent rollers along the longitudinal projection.

2. The full complement roller bearing star wheel lubrication device according to claim 1, characterized in that: Each transverse oil hole included in each row of transverse oil holes is communicated with the location of the oil bath partition through the journal annular oil groove.

3. The full complement roller bearing star wheel lubrication device according to claim 2, characterized in that: Diameter d of the longitudinal through oil channel 6-1 With transverse oil hole d 6-2 The diameter satisfies: d 6-1 ≈2×d 6-2 , the groove depth t6 of the journal annular oil groove is 0.5-1mm.

4. The full complement roller bearing star wheel lubrication device according to claim 2, characterized in that: The stop end surface of the end plate stop is evenly provided with a plurality of end plate oil passage grooves.

5. The full complement roller bearing star wheel lubrication device according to claim 4, characterized in that: The inner hole resistance increasing groove is arranged in a thread shape, and the depth of the inner hole resistance increasing groove is δ 7-1 Satisfaction: δ 7-1 ≤δ 3-2 Where: δ 3-2 Represents the average clearance between the inner bore of the end plate and the outer diameter of the planet shaft.

6. The full complement roller bearing star wheel lubrication device according to claim 4, characterized in that: The oil bath partition comprises a partition body; a plurality of partition oil passage grooves are distributed on both sides of the partition body, and the partition oil passage grooves on the two sides are arranged in a staggered manner.

7. The full complement roller bearing star wheel lubrication device according to claim 6, characterized in that: The width of the oil groove of the partition is t≈2h, and the thickness is δ8≈h / 5; h represents the thickness of the oil bath partition.

8. The full complement roller bearing star wheel lubrication device according to claim 7, characterized in that: Diameter of longitudinal oil passage d 6-1 , transverse oil hole diameter d 6-2 , the depth of the annular oil groove of the journal t6, the average gap between the outer circle of the oil bath partition and the inner hole of the planetary gear δ 3-4 Satisfaction: d 6-1 >d 6-2 >t6>δ 3-4 .

9. The full complement roller bearing star wheel lubrication device according to claim 8, characterized in that: Average gap δ between the end face of the end plate stop and the outer end face of the outermost row of rollers 3-3 , the average gap δ between the inner hole of the end baffle and the outer diameter of the planetary shaft 3-2 , the average clearance δ between the large end face of the end baffle and the inner boss plane on the same side of the wheel frame 3-1 Satisfaction: δ 3-3 >δ 3-2 >δ 3-1 .

10. A method for lubricating a full complement roller bearing star wheel according to claim 6, characterized in that: When the small oil tank of each star wheel rotates to the bottom of the large oil pool, the lubricating oil slowly enters the internal cavity of the maximum full complement roller bearing through the longitudinal through oil channel, transverse oil hole, journal annular oil groove, partition oil grooves on the front and back sides of the oil bath partition, and end plate oil grooves; When the small oil tank of the star wheel moves away from the liquid level of the large oil pool, the lubricating oil that fills and permeates the relative moving lubrication points in the gaps of the small oil tank of the star wheel is slowly released along the oil-passing gaps of the inner hole resistance-increasing grooves of the end baffle, achieving slow-in and slow-out long-term lubrication; The planetary gear small oil tank is specifically a quasi-sealed local small sealed cavity formed in the inner hole of the planetary gear after the end plate stop is tightly matched with the inner hole of the planetary gear.

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