Anti-tilt dynamic and static pressure combined lubricating oil pad for rotary table

Abstract

The application discloses a kind of anti-inclination dynamic and static pressure composite lubricating oil pad for rotary table in the field of liquid lubrication, three corresponding edges of first, second circular arc oil sealing edge, first linear oil sealing edge and bottom plate are seamlessly connected by corresponding first, third, second inclined surface above bottom plate, the horizontal cross section of first, second circular arc oil sealing edge is circular arc shape with opening towards the center of rotary table, the top of inner wall of second inclined surface gradually increases along the rotation direction of rotary table, and the end close to first circular arc oil sealing edge is lower than the top surface of first circular arc oil sealing edge;Multiple wedge grooves are respectively arranged on the inner wall of three inclined surfaces from top to bottom, and multiple fourth wedge grooves are opened on bottom plate;Along the rotation direction of rotary table, the groove depth of first, third, fourth wedge grooves gradually increases, and the groove depth of second wedge groove gradually decreases until 0;Static pressure lubrication and dynamic pressure lubrication are used for mixed lubrication, the composite bearing of low-speed static pressure and high-speed dynamic pressure is realized, and stability and anti-inclination ability are enhanced.

Description

Technical Field

[0001] This invention relates to the field of liquid lubrication technology, specifically to lubricating oil pads for rotary tables, and particularly to anti-tilting hydrostatic composite lubricating oil pads for heavy machine tool rotary tables. Background Technology

[0002] Heavy-duty machine tools are an indispensable part of manufacturing, playing an irreplaceable role in the high-precision and complex machining of large parts in industries such as defense, aerospace, construction, and mining and metallurgy. Currently, most heavy-duty CNC machine tools use hydrostatic lubrication to lubricate their massive rotating structures, but combined hydrostatic and dynamic lubrication is not yet practically used. Using only hydrostatic lubrication, under high-pressure and high-speed machining conditions, the resulting cutting forces and varying support forces due to different oil film thicknesses are not directed towards the center of the turntable. These forces cause the hydrostatic turntable to tilt, generating a rotational torque. The tilted turntable then compresses the oil film, causing changes in its thickness. The overall dynamic equations of the turntable show that the bearing capacity of the oil pad is inversely proportional to the cube of the oil film thickness, and the impact force received by the hydrostatic oil film is positively correlated with the rotational speed. Therefore, the varying bearing capacity cannot withstand the impact force from high rotational speeds under tilted conditions; otherwise, machining accuracy, efficiency, and overall turntable stability will be affected. On the other hand, due to the large size, slow speed, and low machining efficiency of heavy-duty CNC machine tool rotary tables, increasing the speed without compromising oil film stability becomes a crucial issue in heavy-duty CNC machine tool production. Therefore, hydrodynamic lubrication must be introduced in addition to hydrostatic lubrication. Furthermore, under high-speed and high-pressure conditions, hydrostatic pressure alone provides support, which is prone to temperature rise due to friction and other factors. Prolonged high-intensity support inevitably leads to temperature rise in the lubricating oil, causing it to deteriorate and affecting its load-bearing capacity, resulting in unstable load-bearing conditions. Therefore, a liquid-cooled rotary table structure is necessary to minimize temperature rise.

[0003] Currently, hydrostatic lubrication supports are widely used in industrial production and daily life, offering good lubrication and stable support under low pressure and low speed conditions. However, existing hydrostatic lubrication support technologies still have a series of problems, such as the inability to achieve stable lubrication under higher pressure and speed. For example, a hydrostatic turntable device disclosed in patent application CN202411888404.9 uses hydrostatic lubrication to support the turntable structure, but it cannot effectively guarantee oil temperature control and stable lubrication under high speed and high pressure conditions. Summary of the Invention

[0004] The purpose of this invention is to address the issue that the large lubrication structure used in large turntables that rely solely on hydrostatic lubrication under high pressure and high speed conditions is prone to instability due to the generation of overturning torque caused by changes in oil film thickness and load fluctuations. This invention proposes an anti-tilting hydrostatic composite lubricating oil pad for turntables, which can provide more stable support and better load-bearing capacity under high speed and high pressure conditions.

[0005] To achieve the above objectives, the present invention provides an anti-tilting hydrostatic composite lubricating oil pad for a turntable, employing the following technical solution: Its bottom is a horizontal base plate with four sides. Above the base plate, along the rotation direction of the turntable, are, in sequence, an outer first arc-shaped oil sealing edge, a right first straight oil sealing edge, an inner second arc-shaped oil sealing edge, and a left second straight oil sealing edge. The top surfaces of all four oil sealing edges are parallel to the base plate. The first and second arc-shaped oil sealing edges, the first straight oil sealing edge, and the three corresponding edges of the base plate are seamlessly connected via corresponding first, third, and second inclined surfaces. The second straight oil sealing edge and the fourth edge of the base plate are seamlessly connected via a connecting side. The horizontal cross-sections of the first and second arc-shaped oil sealing edges are both arc-shaped with openings facing the center of the turntable. The centers and arc angles of the two arcs are the same, creating an oil cavity... It is fan-shaped; the top of the inner wall of the first inclined surface is lower than the top surface of the first arc-shaped sealing edge, and the top of the inner wall of the third inclined surface is flush with the top surface of the second arc-shaped sealing edge; the top of the inner wall of the second inclined surface gradually increases in the direction of rotation of the turntable, and the end near the first arc-shaped sealing edge is lower than the top surface of the first arc-shaped sealing edge; the inner walls of the first, second, and third inclined surfaces are provided with multiple corresponding first, second, and third wedge-shaped grooves from top to bottom, and multiple fourth wedge-shaped grooves are opened on the base plate; each of the first, second, and third wedge-shaped grooves is connected to a corresponding fourth wedge-shaped groove on the base plate; along the direction of rotation of the turntable, the groove depth of the first, third, and fourth wedge-shaped grooves gradually increases, the groove depth of the second wedge-shaped groove gradually decreases until it is 0, and the top of the inner wall of the second wedge-shaped groove is flush with the top surface of the first straight sealing edge.

[0006] The inner wall of the connecting side between the second straight sealing edge and the base plate is perpendicular to the base plate.

[0007] The base plate has a circular groove that is a blind groove, and the bottom of the circular groove has a through oil inlet hole.

[0008] The second straight sealing edge surface is provided with circular pits distributed in a honeycomb array and microchannels connecting the circular pits.

[0009] In use, multiple anti-tilt dynamic and static pressure composite lubricating oil pads are evenly distributed along the rotation direction of the turntable. Adjacent anti-tilt dynamic and static pressure composite lubricating oil pads do not contact each other, and the four oil sealing edges are below the turntable.

[0010] Compared with the prior art, the present invention has the following outstanding advantages:

[0011] (1) Compared with the single hydrostatic lubrication support structure, the present invention introduces the dynamic lubrication support method, which uses a combination of hydrostatic lubrication and dynamic lubrication for lubrication. This solves the problem that hydrostatic lubrication is prone to problems such as changes in oil film thickness caused by high-speed rotation and the resultant force generated by various loads during processing that do not point towards the center of the turntable, which can cause the turntable to tilt. The principle of dynamic lubrication support determines that its load-bearing capacity is more stable at high speeds and has different load-bearing capacities for different speeds.

[0012] (2) Compared with the normal oil pad of ordinary hydrostatic lubrication support, the present invention can have a relatively different oil pad thickness variation trend for different speed change trends, so that the bearing force generated by the hydrodynamic lubrication support is uniform everywhere, and different linear speeds generate different support forces, ensuring the stable support of the turntable during operation, ensuring the stability of processing quality and the long-term operation of the turntable structure.

[0013] (3) The present invention uses liquid to flow in a special flow path of the turntable, which continuously carries away heat, ensuring the oil pad temperature is stable and the hydraulic oil temperature is stable, reducing the occurrence of temperature rise. Therefore, there is no need to add an additional cooling structure.

[0014] (4) The groove structure designed in this invention allows the lubricating oil to be continuously driven to flow during the rotation of the turntable, thereby enabling the lubricating oil to be continuously renewed, reducing the occurrence of temperature rise, and solving the problems of poor fluidity, strong convection, large friction and significant temperature rise of hydraulic oil on the boundary opposite to the rotation direction on the oil pad during lubrication.

[0015] (5) This invention employs a fan-shaped oil cavity and forms a stable pressure oil film through quantitative oil supply. This oil film is located between the oil sealing edge and the turntable gap, possessing high precision, high rigidity, and vibration resistance, and is used to support the turntable's self-weight and external loads. During long-term operation of the machine tool, the oil pad and the machine tool's turntable surface are prone to uneven support due to wear or flatness errors, causing the turntable to tilt, which in turn leads to a sharp increase in the local oil film bearing capacity. As the rotational speed increases, the impact force on the oil film increases exponentially, easily leading to oil film instability or even rupture, seriously affecting machining accuracy and stability. This invention combines hydrostatic lubrication with dynamic lubrication to achieve composite bearing capacity of low-speed hydrostatic pressure and high-speed dynamic pressure, enhancing system stability and anti-tilting capability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an anti-tilting hydrostatic composite lubricating oil pad for a turntable according to the present invention;

[0017] Figure 2 for Figure 1 The main view;

[0018] Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure in the diagram;

[0019] Figure 4 for Figure 2 Schematic diagram of the BB cross-sectional structure in the middle;

[0020] Figure 5 for Figure 2 A schematic diagram of the three-dimensional structure after sectioning along section AA;

[0021] Figure 6 for Figure 2 A schematic diagram of the three-dimensional structure after sectioning along BB;

[0022] Figure 7 for Figure 4 The enlarged schematic diagram of the I-shaped structure shows the triangular cross-section of the wedge-shaped groove;

[0023] Figure 8 yes Figure 2 An enlarged schematic diagram of the top surface structure of the straight-line sealing edge B2, showing the pits and hexagonally distributed microchannels on it;

[0024] Figure 9 for Figure 1 The diagram shows the working state of the anti-tilting hydrostatic composite lubricating oil pad of the present invention when applied to a turntable.

[0025] In the figure: A1. First arc-shaped oil sealing edge; A2. Second arc-shaped oil sealing edge; B1. First straight oil sealing edge; B2. Second straight oil sealing edge; C1. First inclined surface; C2. Second inclined surface; C3. Third inclined surface; D1. Circular groove; D2. Oil inlet hole; E. Base plate; F1. First wedge-shaped groove; F2. Second wedge-shaped groove; F3. Third wedge-shaped groove; F4. Fourth wedge-shaped groove; G. Anti-tilting dynamic and static pressure composite lubricating oil pad of the present invention; H. Turntable; L1. First vertical edge; L2. Second vertical edge; L3. Triangular edge; M1. Circular recess; M2. Microchannel.

[0026] Specific implementation method

[0027] like Figure 1 and Figure 9 As shown, the orientation of the present invention is defined as follows: the orientation near the rotation center of the turntable H is "inner", the orientation near the edge of the turntable H is "outer", the first arc sealing edge A1 is on the outer side, the second arc sealing edge A2 is on the inner side, the position of the bottom plate E is "bottom" or "lower", and the position of the sealing edge is "top" or "lower".

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5and Figure 6 As shown, the anti-tilting hydrostatic composite lubricating oil pad of the present invention has a horizontal base plate E at its bottom. The base plate E has four sides, and above the four sides of the base plate E are four oil sealing edges. Along the rotation direction of the turntable H, the four oil sealing edges are, in sequence, the outer first arc oil sealing edge A1, the right first straight oil sealing edge B1, the inner second arc oil sealing edge A2, and the left second straight oil sealing edge B2. All four oil sealing edges are wall-shaped with thickness, have the same width in the horizontal direction, the same thickness in the vertical direction, and their top surfaces are flush and parallel to the base plate E. Among them, the first arc oil sealing edge A1 is seamlessly connected to the first side of the base plate E through the first inclined surface C1; the first straight oil sealing edge B1 is seamlessly connected to the second side of the base plate E through the second inclined surface C2; ​​the second arc oil sealing edge A2 is seamlessly connected to the third side of the base plate E through the third inclined surface C3; and the second straight oil sealing edge B2 is seamlessly connected to the fourth side of the base plate E through a connecting side, the inner wall of which is perpendicular to the base plate E. Three inclined surfaces C1 and a connecting side are seamlessly connected in sequence to form an oil cavity that can hold lubricating oil. The depth of the oil cavity is the vertical height from the bottom plate E to the oil sealing edge.

[0029] The horizontal cross-sections of the outer first arc sealing edge A1 and the inner second arc sealing edge A2 are both arc-shaped. The openings of the two arcs face the center of the turntable H. The center and arc angle of the two arcs are the same, making the entire oil pad a fan-shaped structure and the oil cavity a fan-shaped oil cavity.

[0030] A circular groove D1 is formed on the base plate E. The circular groove D1 is a blind groove, and its depth can be approximately half the thickness of the base plate E. A circular oil inlet D2, penetrating the base plate E, is formed at the bottom of the circular groove D1. (See [reference]). Figure 3 Lubricating oil can enter the oil chamber through the oil inlet D2. There are four oil inlets D2, which are evenly distributed along the circumference of the annular groove D1.

[0031] Combination Figure 3 The top of the inner wall of the first inclined surface C1 is slightly lower than the top surface of the first arc-shaped sealing edge A1, and the top of the inner wall of the third inclined surface C3 is flush with the top surface of the second arc-shaped sealing edge A2.

[0032] Combination Figure 4 The top of the inner wall of the second inclined surface C2 is not level with the top surface of the first straight oil sealing edge B1. Specifically, the height of the top of the inner wall of the second inclined surface C2 near the first arc oil sealing edge A1 is lower, slightly lower than the top surface of the first arc oil sealing edge A1, while the height of the top of the inner wall near the second arc oil sealing edge A2 is higher, and this end is level with the top surface of the second arc oil sealing edge A2. That is, the top of the inner wall of the second inclined surface C2 gradually increases in height from the first arc oil sealing edge A1 to the second arc oil sealing edge A2 along the rotation direction of the turntable H.

[0033] Multiple first wedge-shaped grooves F1 are provided from top to bottom on the inner wall of the first inclined surface C1, and multiple third wedge-shaped grooves F3 are provided from top to bottom on the inner wall of the third inclined surface C3. Multiple fourth wedge-shaped grooves F4 are provided on the base plate E. All three wedge-shaped grooves F1, F3, and F4 are straight blind grooves. Each wedge-shaped groove F1 or F3 on the first and third inclined surfaces C1 and C3 is connected to a fourth wedge-shaped groove F4 on the base plate E. The groove walls of the wedge-shaped grooves F1, F3, and F4 on the inclined surfaces are flush with the groove wall of the fourth wedge-shaped groove F4 on the base plate E. Adjacent wedge-shaped grooves F1, F3, or F4 on the inclined surfaces are not parallel to each other; the distance between their tops is greater than the distance between their bottoms, exhibiting a radial distribution.

[0034] The bottom of the inner walls of the first inclined surface C1, the second inclined surface C2, and the third inclined surface C3 are all flush with the bottom plate E.

[0035] The first wedge-shaped groove F1, the third wedge-shaped groove F3, and the fourth wedge-shaped groove F4 are identical in structure except for their lengths, and have the same groove width. Their longitudinal sections along the groove depth are all identical right-angled triangles. See also... Figure 7 As shown, the first perpendicular side L1 and the second perpendicular side L2 of the right triangle are vertical, and the other side is the base, which is the inclined triangular side L3.

[0036] The first vertical edge L1 is closer to the first straight oil sealing edge B1, and the groove depth on this side is smaller. The second vertical edge L2 is closer to the second straight oil sealing edge B2, and the groove depth on this side is larger. That is, the bottom of the first wedge-shaped groove F1, the third wedge-shaped groove F3 and the fourth wedge-shaped groove F4 gradually slopes downward along the rotation direction of the turntable H, and the groove depth gradually increases, forming a wedge shape.

[0037] Multiple second wedge-shaped grooves F2 are provided from top to bottom on the inner wall of the second inclined surface C2. The top of the inner wall of the second wedge-shaped groove F2 is flush with the top surface of the first straight oil sealing edge B1. The longitudinal section of the second wedge-shaped groove F2 along the groove depth direction is also triangular. The three sides of the triangle are the first side flush with the second inclined surface C2, the second vertical side, and the third side forming the bottom surface of the second wedge-shaped groove F2. The groove depth of the second wedge-shaped groove F2 is larger on the side near the first arc oil sealing edge A1. As it approaches the second arc oil sealing edge A2, its depth continuously decreases until it becomes 0, and then it becomes flush with the inclined surface of the second inclined surface C2. That is, along the rotation direction of the turntable H, the bottom surface of the second wedge-shaped groove F2 gradually slopes upward, and the groove depth gradually decreases until it becomes 0. The width of each second wedge groove F2 is consistent, and they are not parallel to each other. Near the end of the bottom plate E, two adjacent second wedge grooves F2 are relatively close to each other. As they approach the first straight sealing edge B1, the distance between two adjacent second wedge grooves F2 continuously increases, showing a radial distribution.

[0038] like Figure 8 As shown, the top surface of the second straight sealing edge B2 is provided with circular pits M1 distributed in a honeycomb array and microchannels M2 connecting the circular pits M1.

[0039] like Figure 9 As shown, in use, multiple anti-tilt hydrostatic composite lubricating oil pads G, as described in this invention, are evenly distributed along the rotation direction of the turntable H. A distance is maintained between adjacent anti-tilt hydrostatic composite lubricating oil pads G, ensuring they do not contact each other. The four sealing edges are located below the turntable H. Before use, the turntable H is stationary. During use, the oil distributor is first opened, providing pressure to the lubricating oil. The oil is supplied quantitatively through the oil inlet D2 below the oil pads G. The oil enters the oil chamber through the inlet D2 and passes through the annular groove D1, filling the oil chamber completely. Quantitative oil supply maintains a constant oil film thickness, preventing oil film rupture or energy loss due to uneven oil volume, ensuring balanced flow in each oil chamber, controllable load-bearing stiffness, and reducing energy consumption and temperature rise. After the lubricating oil fills the oil chamber, it can push the turntable H to produce a small displacement. A stable oil film is formed between the oil seal and the turntable H. This oil film supports the turntable H and the oil seal, preventing them from contacting each other and avoiding hard friction during initial rotation, which could damage the oil seal and compromise lubrication. The supported state is achieved by the pressurized oil filling the oil chamber, supporting the turntable H with a slight upward displacement.

[0040] After a relatively stable oil film is formed, the turntable H begins to rotate and continuously accelerates. When the turntable H operates under low speed and low pressure conditions, it relies on the external oil supply pressure to form a hydrostatic lubrication layer for support, unaffected by relative speed. The hydrostatic lubrication effect is very stable, with only a small degree of temperature rise. As the rotation accelerates, under high speed and high pressure conditions, the temperature of the hydrostatic lubrication oil film will continuously rise due to the constant friction during lubrication, easily leading to problems such as temperature rise effect, viscosity reduction, and weakened support force, thus affecting the hydrostatic lubrication effect and limiting its ability to support non-axial loads. This invention can provide better support under high speed and high pressure conditions. Hydrostatic lubrication provides stable load bearing at low speeds, while as the rotational speed and relative speed increase, hydrodynamic lubrication gradually participates in load bearing, automatically transitioning the lubrication method from hydrostatic to a combination of hydrostatic and hydrodynamic lubrication.

[0041] Hydrodynamic lubrication requires three conditions to be met: first, the lubricating oil must have a certain viscosity and be continuously supplied; second, there must be relative motion between the two surfaces, with the oil entering from the larger opening and exiting from the smaller opening; and third, a converging wedge-shaped oil gap must be formed between the opposing surfaces. As the rotational speed of the turntable H increases, a larger relative velocity occurs between the oil pad and the turntable H. Due to the viscosity between the oil, the turntable H it contacts, and the inner wall of the oil cavity, relatively stable hydrodynamic lubrication is generated. The support effect of hydrodynamic lubrication improves with increasing rotational speed, highlighting its unique advantage. The transition in its support effect does not occur immediately; as long as the conditions for hydrodynamic lubrication are met, it participates in the combined lubrication support with hydrostatic lubrication.

[0042] To meet the conditions for hydrodynamic lubrication, this invention incorporates a second inclined surface C2. This second inclined surface C2 causes the oil cavity depth to gradually decrease along the rotation direction of the turntable H. During operation, there is viscosity between the oil and the turntable H, and the oil is carried by the turntable H in the rotation direction. Because the depth of the oil cavity on the second inclined surface C2 continuously decreases with rotation, a converging wedge-shaped oil gap is formed, achieving hydrodynamic lubrication. This is based on the one-dimensional equation of hydrodynamic lubrication. And the linear velocity formula v = 2πnr, where The gradient of pressure along the flow direction in the oil film is represented by η, the viscosity of the lubricating oil is represented by v, the relative sliding speed is represented by h, the thickness of the local oil film is represented by h0, the minimum thickness of the oil film is represented by n, the rotational speed is represented by r, and the linear velocity v at the location of the turntable H increases as the distance from the rotation center increases. In order to maintain a relatively balanced support, the location with a larger linear velocity needs to have a smaller oil cavity depth.

[0043] The second inclined surface C2 has different heights at both ends on the inner wall of the first straight sealing edge B1. The oil cavity depth is appropriately reduced in the area near the rotation center of the turntable H, while increasing in the area further away from the center. This balances the uneven load distribution caused by differences in linear velocity at different radii. Furthermore, the second wedge-shaped groove F2 on the second inclined surface C2 gradually decreases in depth along the rotation direction, allowing the oil to flow from deep to shallow, thereby enhancing the dynamic pressure support effect.

[0044] This invention incorporates wedge-shaped grooves similar to those on the second inclined surface C2 on the first inclined surface C1, the third inclined surface C3, and the base plate E. The depth of these wedge-shaped grooves decreases continuously with the direction of rotation, thus supplementing the hydrodynamic lubrication support force and achieving balanced hydrodynamic support at high speeds. To improve the stability of the oil film at the sealing edge, an array structure of honeycomb-like circular pits M1 and microchannels M2 is adopted on the surface of the second straight sealing edge B2. This structure stores oil and enhances oil convection and renewal rates, preventing oil film rupture and improving lubrication stability and load-bearing stiffness during high-speed operation.

[0045] To address the issues of oil film instability and overturning torque caused by temperature rise, high-speed operation leads to increased temperature, which decreases the viscosity of the lubricating oil, thins the oil film, reduces its supporting force, and may even cause it to break, resulting in non-axial overturning torque in the rotating structure. This invention introduces hydrodynamic lubrication, utilizing the dynamic pressure generated by relative velocity at high speeds to compensate for the deficiencies of hydrostatic lubrication, preventing oil film collapse and achieving an optimized anti-tilting effect.

Claims

1. An anti-tilting hydrostatic composite lubricating oil pad for a turntable, the bottom of which is a horizontal base plate with four sides, characterized in that: Above the base plate, along the rotation direction of the turntable, are the outer first arc sealing edge, the right first straight sealing edge, the inner second arc sealing edge, and the left second straight sealing edge, with the top surfaces of all four sealing edges parallel to the base plate. The first and second arc-shaped sealing edges, the first straight sealing edge, and the three corresponding edges of the base plate are seamlessly connected through the corresponding first, third, and second inclined surfaces. The second straight sealing edge and the fourth edge of the base plate are seamlessly connected through a connecting side. The horizontal cross-sections of the first and second circular arc sealing oil edges are both circular arcs with openings facing the center of the turntable. The centers and arc angles of the two circular arcs are the same, making the oil cavity fan-shaped. The top of the inner wall of the first inclined surface is lower than the top surface of the first arc-shaped sealing edge, and the top of the inner wall of the third inclined surface is flush with the top surface of the second arc-shaped sealing edge. The top of the inner wall of the second inclined surface gradually rises along the rotation direction of the turntable, and the end near the first arc sealing edge is lower than the top surface of the first arc sealing edge. The inner walls of the first, second, and third inclined surfaces are provided with a plurality of corresponding first, second, and third wedge-shaped grooves from top to bottom, and the bottom plate is provided with a plurality of fourth wedge-shaped grooves; each of the first, second, and third wedge-shaped grooves is connected and communicates with a corresponding fourth wedge-shaped groove on the bottom plate. Along the rotation direction of the turntable, the groove depth of the first, third and fourth wedge-shaped grooves gradually increases, while the groove depth of the second wedge-shaped groove gradually decreases until it becomes 0. The top of the inner wall of the second wedge-shaped groove is flush with the top surface of the first straight sealing edge. The base plate has a circular groove that is a blind groove. There are four through oil inlets at the bottom of the circular groove, which are evenly arranged along the circumference of the circular groove. The second straight sealing edge surface is provided with circular pits distributed in a honeycomb array and microchannels connecting the circular pits.

2. The anti-tilting hydrostatic composite lubricating oil pad for a turntable according to claim 1, characterized in that: The inner wall of the connecting side between the second straight sealing edge and the base plate is perpendicular to the base plate.

3. The anti-tilting hydrostatic composite lubricating oil pad for a turntable according to claim 1, characterized in that: In use, multiple anti-tilt dynamic and static pressure composite lubricating oil pads are evenly distributed along the rotation direction of the turntable. Adjacent anti-tilt dynamic and static pressure composite lubricating oil pads do not contact each other, and the four oil sealing edges are below the turntable.

4. The anti-tilting hydrostatic composite lubricating oil pad for a turntable according to claim 1, characterized in that: The first, third, and fourth wedge-shaped grooves are all straight blind grooves with the same width.

5. The anti-tilting hydrostatic composite lubricating oil pad for a turntable according to claim 1, characterized in that: The bottom of the inner wall of both the first and second inclined surfaces is flush with the base plate.

6. The anti-tilting hydrostatic composite lubricating oil pad for a turntable according to claim 1, characterized in that: The depth of the circular groove on the base plate is half the thickness of the base plate.

7. The anti-tilting hydrostatic composite lubricating oil pad for a turntable according to claim 1, characterized in that: The bottom of the inner wall of the first, second, and third inclined surfaces is flush with the base plate.

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