Hydrostatic bearing of ladle turret
By adopting a hydrostatic bearing structure and lubrication mechanism on the rotary table, and utilizing the hydrostatic lubrication system formed by the hemisphere and oil pipe, the problem of high friction and severe wear of the planar bearing under load is solved, achieving low wear and long service life of the bearing.
Patent Information
- Application Number
- CN202520151697.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2035-01-22
AI Technical Summary
The planar bearings used in existing rotary tables are prone to slight deformation under load, resulting in significant friction, severe wear, and high maintenance requirements, which affects the proper operation and lifespan of the bearings.
It adopts a hydrostatic bearing structure, including a lower bearing ring, a middle bearing ring, an upper bearing ring, a bearing tray, and rolling elements. Combined with a lubrication mechanism, it utilizes a hydrostatic lubrication system formed by a hemisphere and oil pipes to adapt to the slight deformation of the bearing ring, reduce friction, and improve service life.
By using hemispherical hydrostatic lubrication, friction between bearing rings is reduced, wear is decreased, bearing service life and operational stability are improved, and maintenance requirements are simplified.
Smart Images
Figure CN223549644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotary table technology, and in particular to a hydrostatic bearing for a rotary table. Background Technology
[0002] The ladle turret is an indispensable part of the continuous casting and rolling process. The ladle turret is used to receive molten steel at the ladle receiving position and rotate it to the casting position. To ensure continuous casting, after the single-arm casting is completed, the second arm (full of molten steel) is rotated to the casting position. During the process of molten steel flowing from the casting position to the tundish, the opposite arm can receive the full ladle of molten steel. Once the casting ladle is empty, the ladle rotates 180° to ensure continuous casting.
[0003] Existing rotary tables typically use large flat bearings. When subjected to load, the bearing rings usually undergo slight deformation. Since the bearing rings are in rigid contact, this usually results in rigid friction, which easily leads to wear. Considering the high precision required for installation and maintenance, such maintenance is quite troublesome. Without maintenance, the correct operation and lifespan of the bearing cannot be ensured.
[0004] Therefore, it is necessary to propose a hydrostatic bearing for a rotary table to solve or at least alleviate the above-mentioned defects. Utility Model Content
[0005] The main objective of this invention is to provide a hydrostatic bearing for a rotary table to solve the problem of high wear caused by excessive friction between bearing rings in existing planar bearings.
[0006] To achieve the above objectives, this utility model provides a hydrostatic bearing for a rotary table, comprising a bearing body and a lubrication mechanism; wherein,
[0007] The bearing body includes a lower bearing ring, a middle bearing ring, an upper bearing ring, a bearing base, and multiple rolling elements spaced apart along its own axial direction. The upper bearing ring is correspondingly connected to the top of the lower bearing ring, and the outer ring section of the lower bearing ring is recessed to form an installation space. The middle bearing ring is connected in the installation space and disposed between the upper bearing ring and the lower bearing ring, and the rolling elements are connected between the middle bearing ring and the lower bearing ring. The middle bearing ring extends radially outward, and the bearing base is correspondingly connected to the middle bearing ring.
[0008] The lubrication mechanism includes multiple lubrication units arranged circumferentially along the bearing body. Each lubrication unit includes a first oil pipe, a second oil pipe, and a first hemisphere and a second hemisphere arranged vertically opposite each other.
[0009] The first hemisphere is placed inside the upper ring of the bearing, and the plane of the first hemisphere is in contact with the middle ring of the bearing. The first hemisphere has a first oil outlet channel extending along its own axial direction. The oil outlet end of the first oil pipe passes through the upper ring of the bearing and extends into the first oil outlet channel. The oil inlet end of the first oil pipe extends out of the upper ring of the bearing.
[0010] The second hemisphere is placed inside the lower ring of the bearing, and the plane of the second hemisphere is in contact with the middle ring of the bearing. The second hemisphere has a second oil outlet channel extending along its own axial direction. The oil outlet end of the second oil pipe passes through the lower ring of the bearing and extends into the second oil outlet channel. The oil inlet end of the second oil pipe extends out of the lower ring of the bearing.
[0011] Preferably, both the plane of the first hemisphere and the plane of the second hemisphere are cast to form an oil outlet layer, and an oil outlet hole is opened in the middle of the oil outlet layer. The first oil outlet channel and the second oil outlet channel are respectively connected to the oil outlet hole.
[0012] Preferably, the oil outlet layer is recessed and has multiple oil cavities spaced apart along its circumference, with one end of each oil cavity connected to the oil outlet hole.
[0013] Preferably, the horizontal cross-section of the oil cavity is curved.
[0014] Preferably, the oil-producing layer is made of Babbitt alloy.
[0015] Preferably, each of the lubrication units further includes a first oil return plate and a second oil return plate, wherein the first oil return plate is connected to the oil inlet end of the first oil pipe; and the second oil return plate is connected to the oil inlet end of the second oil pipe.
[0016] Preferably, each of the lubrication units further includes a diaphragm throttle, a first connecting pipe, and a second connecting pipe. One end of the first connecting pipe is connected to the first oil return pan, and the other end of the first connecting pipe is connected to the diaphragm throttle. One end of the second connecting pipe is connected to the second oil return pan, and the other end of the second connecting pipe is connected to the diaphragm throttle.
[0017] Preferably, the lower ring of the bearing has a through channel extending radially therein, and the second connecting pipe passes through the through channel.
[0018] Preferably, each of the lubrication units further includes a rubber ring, which is connected to the oil outlet layer and sleeved on the outer ring of the oil cavity.
[0019] Preferably, the number of oil chambers is four, and the four oil chambers are arranged at intervals along the circumference of the oil outlet layer.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] This utility model provides a hydrostatic bearing for a rotary table, comprising a bearing body and a lubrication mechanism. The bearing body includes a lower bearing ring, a middle bearing ring, an upper bearing ring, a bearing base, and multiple rolling elements spaced apart along its own axial direction. The lubrication mechanism includes multiple lubrication units spaced apart circumferentially along the bearing body. Each lubrication unit includes a first oil pipe, a second oil pipe, and a first hemisphere and a second hemisphere arranged vertically opposite each other. The first hemisphere is placed inside the upper bearing ring, and the plane of the first hemisphere is in contact with the middle bearing ring. The first hemisphere has a first oil outlet channel extending along its own axial direction. The oil outlet end of the first oil pipe passes through the upper ring of the bearing and extends into the first oil outlet channel, while the oil inlet end of the first oil pipe extends out of the upper ring of the bearing. The second hemisphere is placed inside the lower ring of the bearing, and the plane of the second hemisphere is in contact with the middle ring of the bearing. The second hemisphere has a second oil outlet channel extending along its own axial direction. The oil outlet end of the second oil pipe passes through the lower ring of the bearing and extends into the second oil outlet channel, while the oil inlet end of the second oil pipe extends out of the lower ring of the bearing. In this way, the supporting components between the bearing rings all adopt a hemispherical coupling structure, which can adapt to the slight deformation of the bearing under load, has strong adaptability, and reduces deformation wear. Since the planes of both hemispheres are in contact with the middle ring of the bearing, the oil will be distributed between the contact surfaces after oil inlet, thus playing a role in liquid lubrication, reducing rigid friction between the bearing rings, reducing wear, and improving the service life of the bearing. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure in one embodiment of the present utility model;
[0024] Figure 2 This is a three-dimensional schematic diagram of a lubrication unit in one embodiment of the present invention;
[0025] Figure 3 This is a schematic cross-sectional view of the assembly of a lubrication unit in one embodiment of the present invention.
[0026] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.
[0027] Explanation of icon numbers:
[0028] 10. Bearing body; 110. Lower bearing ring; 111. Through channel; 120. Middle bearing ring; 130. Upper bearing ring; 140. Tray; 150. Rolling element; 20. Lubrication mechanism; 210. First hemisphere; 211. First oil pipe; 212. First oil outlet channel; 213. First oil return pan; 214. First connecting pipe; 220. Second hemisphere; 221. Second oil pipe; 222. Second oil outlet channel; 223. Second oil return pan; 224. Second connecting pipe; 230. Oil outlet hole; 240. Oil chamber; 250. Diaphragm throttle; 260. Rubber ring. Detailed Implementation
[0029] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0033] Please see the appendix Figure 1-3This utility model provides an embodiment of a hydrostatic bearing for a rotary table, comprising a bearing body 10 and a lubrication mechanism 20. First, it should be noted that, unlike existing rotary tables which generally use large flat bearings, the bearing rings typically undergo slight deformation under load. Since the bearing rings are in rigid contact, this usually results in rigid friction, which easily leads to wear. Considering the high precision requirements for installation and maintenance, such maintenance is quite troublesome; without maintenance, the correct operation and lifespan of the bearing cannot be ensured. This application addresses the above-mentioned deficiencies in the prior art by providing a hydrostatic bearing for a rotary table, as detailed below:
[0034] The bearing body 10 includes a lower bearing ring 110, a middle bearing ring 120, an upper bearing ring 130, a bearing base 140, and a plurality of rolling elements 150 spaced apart along their own axial direction. The upper bearing ring 130 is correspondingly connected to the top of the lower bearing ring 110, and the outer ring segment of the lower bearing ring 110 is recessed to form an installation space. The middle bearing ring 120 is connected in the installation space and disposed between the upper bearing ring 130 and the lower bearing ring 110, and the rolling elements 150 are connected between the middle bearing ring 120 and the lower bearing ring 110. The middle bearing ring 120 extends radially outward, and the bearing base 140 is correspondingly connected to the middle bearing ring 120.
[0035] Specifically, the hydrostatic bearing for the rotary table in this application includes a bearing body 10 and a lubrication mechanism 20. The bearing body 10 is a planar bearing in the rotary table, which typically includes a lower bearing ring 110, a middle bearing ring 120, an upper bearing ring 130, a bearing base 140, and multiple rolling elements 150 spaced apart along their own axial direction. The inner and outer ring sides of the upper bearing ring 130 and the lower bearing ring 110 are aligned, so that the upper bearing ring 130 can be correspondingly connected to the top of the lower bearing ring 110. The outer ring section of the lower bearing ring 110 is recessed to form an installation space, which is used for... The bearing middle ring 120 is inserted and connected, thereby connecting the bearing middle ring 120 in the mounting space and positioning it between the bearing upper ring 130 and the bearing lower ring 110. The outer side of the bearing middle ring 120 extends radially outward, and this extension is used for connection to the tray 140, so that the tray 140 is connected to this extension end. The rolling element 150 is used to ensure the coaxiality between the bearing middle ring 120, the bearing upper ring 130, and the bearing lower ring 110. The lubrication mechanism 20 connected inside the overall bearing body 10 can play a lubricating role when a small amount of deformation friction occurs between the bearing rings.
[0036] The lubrication mechanism 20 includes a plurality of lubrication units arranged circumferentially along the bearing body 10. Each lubrication unit includes a first oil pipe 211, a second oil pipe 221, and a first hemisphere 210 and a second hemisphere 220 arranged vertically opposite to each other. The first hemisphere 210 is built into the upper ring 130 of the bearing, and the plane of the first hemisphere 210 is in contact with the middle ring 120 of the bearing. The first hemisphere 210 has a first oil outlet channel 212 extending along its own axial direction. The oil outlet end of the first oil pipe 211 passes through the upper ring 130 of the bearing and extends into... The first oil pipe 211 is connected to the first oil outlet channel 212, and the oil inlet end of the first oil pipe 211 extends out of the upper ring 130 of the bearing; the second hemisphere 220 is built into the lower ring 110 of the bearing, and the plane of the second hemisphere 220 is in contact with the middle ring 120 of the bearing. The second hemisphere 220 has a second oil outlet channel 222 extending along its own axial direction. The oil outlet end of the second oil pipe 221 passes through the lower ring 110 of the bearing and extends into the second oil outlet channel 222, and the oil inlet end of the second oil pipe 221 extends out of the lower ring 110 of the bearing.
[0037] In detail, multiple lubrication units are arranged circumferentially around the bearing body 10 to ensure that the entire bearing body 10 is lubricated. Each lubrication unit includes a first oil pipe 211, a second oil pipe 221, a first hemisphere 210, and a second hemisphere 220. This allows the rolling elements 150 of the upper ring 130 and lower ring 110 of a traditional planar bearing to be replaced with hemispheres with hydrostatic chambers. The hydrostatic hemispheres are coupled in the form of hemispheres at the corresponding mounting positions of the upper ring 130 and lower ring 110, thus accommodating minute deformations and reducing bearing cost. Besides the wear of the bearing body, the first hemisphere 210 is installed in the upper ring 130 of the bearing, and the second hemisphere 220 is installed in the lower ring 110 of the bearing. The hemispheres are connected to oil pipes, and when oil overflows onto the surfaces where the hemispheres and the bearing middle ring 120 meet, it provides liquid lubrication. This allows the bearing middle ring 120 to be in a suspended state between the upper ring 130 and the lower ring 110. Therefore, whenever the rotating bearing middle ring 120 experiences a slight, gentle deformation, the corresponding hydrostatic hemisphere will adapt to this deformation and tilt appropriately, thus reducing friction. Smaller size results in less wear; therefore, the plane of the first hemisphere 210 fits against the upper part of the bearing middle ring 120 embedded in the installation space, while the plane of the second hemisphere 220 fits against the lower part of the bearing middle ring 120 embedded in the installation space. Each hemisphere has an outlet channel, so that after the oil enters through the inlet end of the first oil pipe 211, it flows out from the outlet end of the first oil pipe 211 to the connected first outlet channel 212. The oil in the first outlet channel 212 then flows back to the plane of the first hemisphere 210, so that the oil in the first hemisphere 210... The oil is formed on the contact surface between the bearing middle ring 120 and the bearing upper ring 130 for liquid lubrication. Similarly, after the oil enters through the oil inlet end of the second oil pipe 221, it flows out from the oil outlet end of the second oil pipe 221 to the connected second oil outlet channel 222. The oil in the second oil outlet channel 222 then flows to the plane of the second hemisphere 220 to form oil on the contact surface between the second hemisphere 220 and the bearing middle ring 120 for liquid lubrication. This reduces the friction between the bearing middle ring 120 and the bearing upper ring 130 and the bearing lower ring 110, increases the lubrication, reduces wear caused by friction, and improves the service life of the bearing.
[0038] In a preferred embodiment of the present invention, an oil outlet layer is cast on both the plane of the first hemisphere 210 and the plane of the second hemisphere 220. An oil outlet hole 230 is provided in the middle of the oil outlet layer. The first oil outlet channel 212 and the second oil outlet channel 222 are respectively connected to the oil outlet hole 230.
[0039] It should be noted that the oil outlet layer serves as a connecting transition layer between the hemisphere and the bearing middle ring 120. After the oil flows out from the oil outlet channel, it overflows on the surface of the oil outlet layer to distribute between the oil outlet layer and the bearing middle ring 120. Therefore, an oil outlet hole 230 is provided in the middle of the oil outlet layer to communicate with the oil outlet channel. Preferably, the oil outlet layer can be formed by casting Babbitt alloy on the plane of the hemisphere. Babbitt alloy is relatively soft and can adapt to deformation as a contact surface, so as to achieve the effect of simultaneously reducing friction damage.
[0040] In a preferred embodiment of the present invention, the oil outlet layer is recessed and has a plurality of oil cavities 240 arranged at intervals along its circumference, one end of the oil cavity 240 being connected to the oil outlet hole 230.
[0041] It should be noted that the oil chamber 240 is used to temporarily store some of the overflowing oil, so that after the oil flows out of the oil outlet 230, it temporarily flows into each oil chamber 240. After the oil chamber 240 is full, it overflows outward to distribute between the oil outlet layer and the bearing middle ring 120 for lubrication. Therefore, one end of the oil chamber 240 is connected to the oil outlet 230, and the other end is built into the oil outlet layer. This can avoid the oil flowing too fast, play a buffering role, and also save oil consumption and reduce costs. Preferably, the horizontal cross-section of the oil chamber 240 is curved. The curved shape can have a larger capacity than the straight shape and make fuller use of the space of the oil outlet layer, thereby achieving the purpose of increasing the capacity of the oil chamber 240 in a small space. The number can be set to four, and the specific number can be set by those skilled in the art according to the actual situation.
[0042] Furthermore, each of the lubrication units also includes a first oil return plate 213 and a second oil return plate 223, wherein the first oil return plate 213 is connected to the oil inlet end of the first oil pipe 211; and the second oil return plate 223 is connected to the oil inlet end of the second oil pipe 221.
[0043] It should be noted that the return oil pan can be used to recover excess oil, thereby avoiding oil waste and reducing costs.
[0044] Furthermore, each of the lubrication units also includes a diaphragm throttle 250, a first connecting pipe 214, and a second connecting pipe 224. One end of the first connecting pipe 214 is connected to the first oil return pan 213, and the other end of the first connecting pipe 214 is connected to the diaphragm throttle 250. One end of the second connecting pipe 224 is connected to the second oil return pan 223, and the other end of the second connecting pipe 224 is connected to the diaphragm throttle 250.
[0045] It should be understood that the diaphragm throttle 250 adjusts the throttling clearance through the elastic deformation of the diaphragm, thereby controlling the fluid flow and pressure to achieve a stable lubrication effect. When the bearing is under load, the upper oil chamber 240 clearance increases and the oil pressure decreases, while the lower oil chamber 240 clearance decreases and the oil pressure increases, creating a pressure difference. This causes the diaphragm of the diaphragm throttle 250 to bulge upwards, resulting in a decrease in the upper throttling clearance and an increase in throttling resistance, while the lower throttling clearance increases and the throttling resistance decreases. At this time, the oil pressure in the lower oil chamber 240 increases, and the clearance in the upper oil chamber 240 decreases. The large turntable is raised according to the pressure difference until the oil pressure in the upper and lower oil chambers 240 is equal, so that the bearing middle ring 120 is surrounded by the upper and lower oil chambers 240, forming liquid lubrication. The upper and lower ends of the diaphragm throttle 250 are connected to the first connecting pipe 214 and the second connecting pipe 224 respectively, and one end of the middle part is used to connect to the annular oil inlet pipe. In this way, the lubricating fluid is uniformly supplied to the diaphragm throttle 250 of each lubrication unit through the annular oil inlet pipe, and then flows to the upper and lower oil chambers 240 through the diaphragm throttle 250 for liquid lubrication.
[0046] Furthermore, the lower ring 110 of the bearing has a through channel 111 extending radially therein, and the second connecting pipe 224 passes through the through channel 111.
[0047] It should be noted that, considering that the thickness of the lower bearing ring 110 is greater than that of the upper bearing ring 130, in order to avoid a large difference in the length of the first connecting pipe 214 and the second connecting pipe 224 affecting the oil pressure, a through channel 111 extending radially is provided in the lower bearing ring 110. The through channel 111 is used for the second connecting pipe 224 to pass through; while the first connecting pipe 214 is directly disposed above the upper bearing ring 130.
[0048] Furthermore, each of the lubrication units also includes a rubber ring 260, which is connected to the oil outlet layer and sleeved on the outer ring of the oil cavity 240.
[0049] It should be noted that the rubber ring 260 can be used for dustproof sealing. It is flat and can remove fine dust in time while avoiding scratching the Babbitt alloy.
[0050] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A hydrostatic bearing for a rotary table, characterized in that, Includes the bearing body and the lubrication mechanism; among which, The bearing body includes a lower bearing ring, a middle bearing ring, an upper bearing ring, a bearing base, and multiple rolling elements spaced apart along its own axial direction. The upper bearing ring is correspondingly connected to the top of the lower bearing ring, and the outer ring section of the lower bearing ring is recessed to form an installation space. The middle bearing ring is connected in the installation space and disposed between the upper bearing ring and the lower bearing ring, and the rolling elements are connected between the middle bearing ring and the lower bearing ring. The middle bearing ring extends radially outward, and the bearing base is correspondingly connected to the middle bearing ring. The lubrication mechanism includes multiple lubrication units arranged circumferentially along the bearing body. Each lubrication unit includes a first oil pipe, a second oil pipe, and a first hemisphere and a second hemisphere arranged vertically opposite each other. The first hemisphere is placed inside the upper ring of the bearing, and the plane of the first hemisphere is in contact with the middle ring of the bearing. The first hemisphere has a first oil outlet channel extending along its own axial direction. The oil outlet end of the first oil pipe passes through the upper ring of the bearing and extends into the first oil outlet channel. The oil inlet end of the first oil pipe extends out of the upper ring of the bearing. The second hemisphere is placed inside the lower ring of the bearing, and the plane of the second hemisphere is in contact with the middle ring of the bearing. The second hemisphere has a second oil outlet channel extending along its own axial direction. The oil outlet end of the second oil pipe passes through the lower ring of the bearing and extends into the second oil outlet channel. The oil inlet end of the second oil pipe extends out of the lower ring of the bearing.
2. The hydrostatic bearing for a rotary table according to claim 1, characterized in that, Both the plane of the first hemisphere and the plane of the second hemisphere are cast to form an oil outlet layer. An oil outlet hole is opened in the middle of the oil outlet layer. The first oil outlet channel and the second oil outlet channel are respectively connected to the oil outlet hole.
3. The hydrostatic bearing for a rotary table according to claim 2, characterized in that, The oil outlet layer is recessed and has multiple oil cavities spaced apart along its circumference. One end of each oil cavity is connected to the oil outlet hole.
4. The hydrostatic bearing for a rotary table according to claim 3, characterized in that, The horizontal cross-section of the oil cavity is curved.
5. The hydrostatic bearing for a rotary table according to claim 2, characterized in that, The oil extraction layer is made of Babbitt alloy.
6. The hydrostatic bearing for a rotary table according to claim 1, characterized in that, Each of the lubrication units further includes a first oil return plate and a second oil return plate, wherein the first oil return plate is connected to the oil inlet end of the first oil pipe; and the second oil return plate is connected to the oil inlet end of the second oil pipe.
7. The hydrostatic bearing for a rotary table according to claim 6, characterized in that, Each of the lubrication units further includes a diaphragm throttle, a first connecting pipe, and a second connecting pipe. One end of the first connecting pipe is connected to the first oil return pan, and the other end of the first connecting pipe is connected to the diaphragm throttle. One end of the second connecting pipe is connected to the second oil return pan, and the other end of the second connecting pipe is connected to the diaphragm throttle.
8. The hydrostatic bearing for a rotary table according to claim 7, characterized in that, The lower ring of the bearing has a through channel extending radially therein, and the second connecting pipe passes through the through channel.
9. The hydrostatic bearing for a rotary table according to claim 3, characterized in that, Each of the lubrication units also includes a rubber ring, which is connected to the oil outlet layer and fitted onto the outer ring of the oil cavity.
10. The hydrostatic bearing for a rotary table according to claim 3, characterized in that, The number of oil cavities is four, and the four oil cavities are arranged at intervals along the circumference of the oil outlet layer.