Large surface throttling self-compensating ultra-precise hydrostatic pressure rotary table

Abstract

The invention provides a large surface throttling self-compensating ultra-precise hydrostatic pressure rotary table, and relates to the field of household kitchens. The large surface throttling self-compensating ultra-precise hydrostatic pressure rotary table comprises a first base, a second base is fixedly installed at the top of the first base, a stator ring is fixedly installed at the top of the second base, a rotor shaft is movably installed in the stator ring, and a connecting disc is fixedly installed at the top of the rotor shaft. An oil cavity and four thickened oil cavities distributed in an annular mode are formed in the stator ring. The base, the stator ring, the rotor shaft and other parts form a basic structure, the oil inlet pipe, the oil outlet pipe and the like form a circulating oil way, the thickness of an oil cavity is synchronously or independently adjusted by means of the adjusting assembly and the fixing assembly, and safety protection under extreme working conditions is provided in cooperation with the rolling shaft. The problem that in the prior art, the thickness of an oil cavity cannot be flexibly adjusted, and deviation of a rotor shaft cannot be coped is effectively solved, and the stability and machining precision of the rotary table in optical mirror machining are improved.

Description

Technical Field

[0001] The invention relates to the technical field of household kitchens, in particular to a large-scale surface throttling self-compensating ultra-precision liquid static pressure turntable. Background Art

[0002] With the rapid development of society, the field of optical engineering has increasingly stringent requirements on the processing accuracy of large-aperture optical mirrors. As a key functional component of ultra-precision grinders for large-aperture optical mirrors, the performance of large ultra-precision turntables directly affects the processing quality of optical mirrors. In the design of large ultra-precision turntables, liquid hydrostatic bearings have become the core supporting components due to their advantages of high rigidity, high precision and low friction. They can form a stable lubricating oil film between the stator system and the rotor system, providing high-precision rotation support for the turntable.

[0003] Chinese invention patent CN103286660B discloses a large-scale surface throttling self-compensating ultra-precision liquid hydrostatic turntable, comprising: a stator system, a rotor system, and a pressure fluid supply and distribution system. The pressure fluid supply and distribution system comprises a top axial hydrostatic bearing and a top radial hydrostatic bearing, a bottom axial hydrostatic bearing and a bottom radial hydrostatic bearing, and provides lubricating oil film support between the stator system and the rotor system. The stator system and rotor system of the hydrostatic turntable of the present invention adopt a geometric design to form a hydrostatic bearing throttling surface gap and an oil sealing surface gap, so as to achieve self-compensation of the bearing oil chamber pressure through throttling flow resistance. The changes in the throttling surface gap and the oil sealing surface gap are exactly opposite to the changes caused by rotor deflection, so that the fluid pressure change generated in the bearing oil chamber is twice that of the fixed throttling hydrostatic bearing, thereby significantly increasing the axial, radial and deflection stiffness of the ultra-precision liquid hydrostatic turntable.

[0004] However, the above patent cannot adjust the thickness of the oil chamber. In the actual processing process, different processing conditions and processing objects have different requirements for the oil film thickness. The fixed oil chamber thickness is difficult to adapt to diverse processing needs. This will cause the turntable to face complex processing loads. The oil film stiffness and load-bearing capacity cannot be optimized in real time, thereby affecting the processing accuracy and the applicability of the turntable. In addition, when polishing the lens, if a larger polishing pressure is applied to one side of the lens, the rotor shaft may deviate to one side. Since the thickness of all oil chambers is the same, the thickness of the oil chamber on the offset side cannot be adjusted separately, resulting in the oil film pressure on the offset side cannot be effectively increased to counteract the polishing pressure, so that the offset of the rotor shaft cannot be corrected in a timely and accurate manner, which easily causes the processing error to increase and even affects the processing quality of the lens and the stability of the turntable. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a large-scale surface throttling self-compensating ultra-precision liquid hydrostatic turntable, which solves the problem that the existing liquid hydrostatic turntable cannot flexibly adjust the oil chamber thickness to adapt to different processing conditions, especially the problem that the rotor shaft offset cannot be accurately corrected when a large grinding pressure is applied on one side.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable, comprising a first base, a second base fixedly mounted on the top of the first base, a stator ring fixedly mounted on the top of the second base, a rotor shaft movably mounted inside the stator ring, a connecting plate fixedly mounted on the top of the rotor shaft, an oil chamber and four annularly distributed thickened oil chambers are defined inside the stator ring, the oil chamber and the four thickened oil chambers are interconnected, the rotor shaft is located inside the oil chamber, and an adjustment assembly is mounted inside the thickened oil chamber; An oil inlet pipe is fixedly connected to the left side of the outer wall of the stator ring, and an oil drain pipe is fixedly connected to the right side of the outer wall of the stator ring. Two upper oil passages distributed left and right are opened inside the stator ring. Two lower oil passages 1 distributed left and right are opened on the lower surface of the stator ring, and a connecting passage is opened between the upper oil passages and the lower oil passages 1 on the same side. Two lower oil passages 2 distributed left and right are opened on the upper surface of the second base, and the lower oil passages 1 and 2 on the same side correspond to each other. The upper oil passage on the left side is connected to the oil inlet pipe, and the upper oil passage on the right side is connected to the oil drain pipe. Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The adjusting assembly further includes a connecting rod, a sleeve, a guide groove, a guide shaft two, a bevel gear one, a bevel gear two and a rotating shaft, the bottom of the lead screw is fixedly connected with the connecting rod, the sleeve is rotatably installed between the base one and the base two, the connecting rod is slidably installed in the sleeve, the inside of the sleeve is provided with the guide groove, the bottom of the connecting rod is fixedly connected with the guide shaft two, the guide shaft two is slidably installed in the guide groove, the bottom of the sleeve is fixedly connected with the bevel gear one, four bevel gears two are movably installed in the inside of the base one, the bevel gear one and the bevel gear two are meshed with each other, the outer wall of the bevel gear two is fixedly connected with the rotating shaft, the end, away from the bevel gear two, of the rotating shaft extends to the outer wall of the base one, and the base one and the sleeve are provided with the fixing assembly.

[0007] Preferably, the rotating shaft is provided with a cross groove at one end of the outer wall of the base one.

[0008] Preferably, the top of the lead screw is fixedly connected with a movable head, and the movable head is movably installed at the bottom of the lifting rod.

[0009] Preferably, the fixing assembly includes a driving motor two, a gear two, a rotating disc, a tooth groove and a clamping block, the outer wall of the base two is fixedly installed with the driving motor two, the output end of the driving motor two is fixedly installed with the gear two, the inside of the base two is rotatably installed with the rotating disc, the outer wall of the rotating disc is provided with a plurality of tooth grooves, the gear two and the tooth groove are meshed with each other, and the inside of the base two is slidably installed with four annularly distributed clamping blocks.

[0010] Preferably, the fixing assembly further includes a support rod one, a support rod two, an arc-shaped groove and a straight groove, the bottom of the clamping block is fixedly connected with the support rod one, the top of the clamping block is fixedly connected with the support rod two, the inside of the rotating disc is provided with four annularly distributed arc-shaped grooves, the inside of the base two is provided with four annularly distributed straight grooves, the support rod one is located in the arc-shaped groove, and the support rod two is located in the straight groove.

[0011] Preferably, the outer wall of the clamping block is provided with a clamping groove, and the sleeve is located in the inner wall of the clamping groove.

[0012] Preferably, the inner wall of the stator ring is provided with four annularly distributed installation grooves, and a plurality of rolling shafts are movably installed in the installation grooves.

[0013] Preferably, the base two and the stator ring are fixedly installed with a sealing ring.

[0014] Preferably, the outer walls of the base one, the base two and the stator ring are fixedly installed with a plurality of connecting blocks, and the connecting blocks are threadedly installed with bolts between the base one, the base two and the stator ring.

[0015] The present invention provides a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable. It has the following beneficial effects: By setting up an adjustment component, the driving motor drives the gear disk to rotate, and then engages multiple gears to rotate. The screw hole inside the gear cooperates with the lead screw. Under the sliding support of the guide shaft 2 and the guide groove, the lead screw drives the lifting rod to move up and down. The guide shaft 1 on the lifting rod slides in the inclined groove of the movable plate, so that the multiple movable plates move inward or outward at the same time, driving the adjustment plate to adjust the space of the thickened oil chamber, realizing the function of adjusting multiple oil chambers at the same time, being able to quickly adapt to the changes in the overall processing conditions, uniformly adjust the oil film thickness, and ensure that when the turntable faces a uniformly distributed processing load, the oil film pressure of each oil chamber is uniform, thereby improving the overall stability and processing accuracy of the turntable.

[0016] By setting up an adjustment component, when it is necessary to adjust a single oil chamber separately, first unlock the sleeve through the fixing component, then rotate the rotating shaft to drive bevel gear two to engage bevel gear one to rotate the sleeve, and under the guide support of the guide groove and guide shaft two, the screw rod moves upward while rotating. Since the screw rod is connected to the lifting rod through the movable head, the lifting rod on this side can move separately, and then through the cooperation of guide shaft one and the inclined groove, the corresponding movable plate and adjustment plate are driven to move, thereby realizing the function of adjusting a single oil chamber separately. It can accurately increase the oil film thickness of the oil chamber on this side for the larger grinding pressure applied on one side, increase the oil film pressure, effectively counteract the deviation of the rotor shaft, and improve the anti-deflection ability and processing accuracy of the turntable under non-uniform load.

[0017] By setting a fixed component, the driving motor 2 drives the gear 2 to engage the tooth groove on the rotating disk, so that the rotating disk rotates. Under the arc guidance of the support rod 1 and the arc groove and the linear guidance of the support rod 2 and the straight groove, the four clamping blocks move synchronously toward the center or outward to achieve the locking and unlocking of the sleeve. When locked, the sleeve is stably fixed to ensure the structural stability of the adjustment component when adjusting multiple oil chambers synchronously, avoiding the adjustment accuracy affected by the shaking of the sleeve. When unlocked, the sleeve can rotate freely, providing a movement basis for the individual adjustment of a single oil chamber, and ensuring the flexibility and reliability of the adjustment method.

[0018] By setting rollers, multiple rollers are movably installed in the mounting grooves on the inner wall of the stator ring. During normal use, the rotor shaft does not deviate at a large angle, and the rollers do not contact the rotor shaft, which does not affect the high-precision rotation of the turntable. However, when the rotor shaft deviates at a large angle in special circumstances, such as sudden huge impact force, overload or accidental collision during processing, the rotor shaft will contact the rollers. The rolling support of the rollers can effectively withstand the deviation force of the rotor shaft, prevent the rotor shaft from being damaged by direct rigid contact with the stator ring, and protect the core components of the turntable. At the same time, it provides additional safety protection for the turntable under extreme working conditions, thereby improving the reliability and durability of the turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable proposed by the present invention; Figure 2 This is a schematic diagram of the exploded structure of a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable proposed by the present invention; Figure 3 This is a schematic cross-sectional view of a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable proposed by the present invention; Figure 4 This is an enlarged structural diagram of an adjustment component in a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable proposed by the present invention; Figure 5 for Figure 4 A in the middle is an enlarged structural diagram; Figure 6 for Figure 4 The enlarged structural diagram at B in the middle; Figure 7 This is a schematic diagram of the exploded structure of part of the fixed components in a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable proposed by the present invention; Figure 8 This is an enlarged structural diagram of a fixed component in a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable proposed by the present invention; Figure 9 for Figure 7 The enlarged structural diagram at C in the middle; Figure 10 This is a schematic diagram of the exploded structure of part of the fixed components in a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable proposed by the present invention; Figure 11 This is a schematic cross-sectional structure diagram of the base 2 and the stator ring in a large-scale surface throttling self-compensating ultra-precision liquid static pressure turntable proposed by the present invention.

[0020] Among them, 1. Base 1; 2. Base 2; 3. Stator ring; 4. Rotor shaft; 5. Connecting plate; 6. Oil chamber; 7. Thickened oil chamber; 8. Adjustment assembly; 801. Adjustment plate; 802. Moving plate; 803. Lifting rod; 804. Guide shaft 1; 805. Bevel groove; 806. Drive motor 1; 807. Toothed plate; 808. Gear 1; 809. Screw; 810. Connecting rod; 811. Sleeve; 812. Guide groove; 813. Guide shaft 2; 814. Bevel gear 1; 815. Bevel gear 2; 816. Rotor Rotating shaft; 817, cross slot; 818, movable head; 9, fixing assembly; 901, driving motor 2; 902, gear 2; 903, rotating disk; 904, tooth groove; 905, clamping block; 9051, clamping groove; 906, support rod 1; 907, support rod 2; 908, arc groove; 909, straight groove; 10, oil inlet pipe; 11, oil drain pipe; 12, upper oil channel; 13, lower oil channel 1; 14, lower oil channel 2; 15, sealing ring; 16, mounting groove; 17, roller; 18, connecting block; 19, bolt. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0022] like Figures 1-11 As shown, an embodiment of the present invention provides a large-scale surface throttling self-compensating ultra-precision hydrostatic turntable, comprising a base 1. Base 1 serves as the basic support component of the entire turntable, providing a stable mounting base for the components. Base 2 2 is fixedly mounted on the top of base 1. Base 2 2 is used to further support the stator ring 3, ensuring that the stator ring 3 is in the correct mounting position and posture. A stator ring 3 is fixedly mounted on the top of base 2 2. A rotor shaft 4 is movably mounted inside the stator ring 3. A connecting plate 5 is fixedly mounted on the top of the rotor shaft 4. An oil chamber 6 and four annularly distributed thickened oil chambers 7 are defined within the stator ring 3. The oil chamber 6 and the four thickened oil chambers 7 are interconnected to form a complete oil flow path. The rotor shaft 4 is located inside the oil chamber 6. An adjustment component 8 is installed inside the thickened oil chamber 7. The adjustment component 8 is used to adjust the oil film thickness of the thickened oil chamber 7 to meet the requirements of different processing conditions.

[0023] The outer wall of the stator ring 3 is fixedly connected with an oil inlet pipe 10 on the left side, the oil inlet pipe 10 is the entrance of lubricating oil into the rotary table, and is connected with an external lubricating oil supply system. The outer wall of the stator ring 3 is fixedly connected with an oil outlet pipe 11 on the right side, the oil outlet pipe 11 is responsible for discharging the used oil, and is connected with an external oil return system. Two left and right distributed upper oil channels 12 are arranged in the stator ring 3. The left upper oil channel 12 is communicated with the oil inlet pipe 10, and serves as the first flow path of the lubricating oil entering the rotary table. Two left and right distributed lower oil channels 13 are arranged on the lower surface of the stator ring 3. The upper oil channel 12 is connected with the lower oil channel 13 through a communication channel, so as to ensure that the oil can flow smoothly from the upper part to the lower part. Two left and right distributed lower oil channels 14 are arranged on the upper surface of the base 2. The lower oil channel 13 is corresponded with the lower oil channel 14, and further guides the oil flow. In use, the lubricating oil is injected through the oil inlet pipe 10, enters the left upper oil channel 12, and then is discharged into the oil cavity 6 and the thickened oil cavity 7, so as to form an oil film and a thickened oil film therein, and provide support and lubrication for the rotor shaft 4. Then, the oil enters the left lower oil channel 13 and the lower oil channel 14 through the communication channel, and then is discharged into the base 2 and the rotor shaft 4 to form an auxiliary oil film, so as to enhance the support effect. Then, the oil enters the right lower oil channel 13 and the sealing ring 15, and finally is discharged from the oil outlet pipe 11 through the right upper oil channel 12 through the right communication channel, so as to complete the whole oil circuit.

[0024] The adjusting assembly 8 includes an adjusting plate 801, a movable plate 802, a lifting rod 803, a guide shaft 804, an inclined slot 805, a driving motor 806, a toothed disc 807, a gear 808 and a screw 809. The adjusting plate 801 is slidably installed inside the thickened oil chamber 7. The adjusting plate 801 directly acts on the space of the thickened oil chamber 7 and changes the oil film thickness by moving. The outer wall of the adjusting plate 801 is fixedly connected to two movable plates 802. Four lifting rods 803 distributed in a ring are rotatably installed inside the stator ring 3. The lifting rod 803 is responsible for driving the guide shaft 804 to move up and down. The top of the lifting rod 803 is fixedly connected to the guide shaft 804. The guide shaft 804 is located between the two movable plates 802 on the same side. An inclined slot 805 is provided inside the movable plate 802. The guide shaft 804 is slidably installed inside the inclined slot 805. The inclination angle of the inclined slot 805 is utilized. Degrees, converting the vertical movement of the lifting rod 803 into the horizontal movement of the moving plate 802 and the adjusting plate 801, a driving motor 806 is fixedly installed on the top of the base 1, and the driving motor 806 serves as a power source. The output shaft of the driving motor 806 extends to the interior of the base 2, and a gear disc 807 and four gears 808 distributed in a ring are movably installed inside the base 2. The output end of the driving motor 806 is fixedly connected to the bottom of the gear disc 807, and the gear disc 807 is engaged with multiple gears 808 to transmit the power of the driving motor 806 to the gear 808. A screw hole is provided inside the gear 808, and a screw rod 809 is movably installed at the bottom of the lifting rod 803. The screw rod 809 is threadedly installed in the screw hole of the gear 808. When the gear 808 rotates, the screw rod 809 moves up and down in the screw hole, thereby driving the lifting rod 803 to move.

[0025] The adjusting assembly 8 also includes a connecting rod 810, a sleeve 811, a guide groove 812, a guide shaft 2 813, a bevel gear 1 814, a bevel gear 2 815 and a rotating shaft 816. The bottom of the screw rod 809 is fixedly connected with a connecting rod 810, and the connecting rod 810 is used to connect the screw rod 809 and the guide shaft 2 813. A sleeve 811 is rotatably installed between the base 1 and the base 2 2. The connecting rod 810 is slidably installed inside the sleeve 811. A guide groove 812 is opened inside the sleeve 811. The bottom of the connecting rod 810 is fixedly connected with the guide shaft 2 813. The guide shaft 2 813 is slidably installed in the guide groove 812. The guide groove 812 and the guide shaft 2 813 cooperate to guide and support the movement of the screw rod 809, ensuring that the screw rod 809 moves up and down stably. At the same time, when the sleeve 811 rotates, the connecting rod 810 and the screw rod 809 are allowed to rotate with the sleeve 811 to maintain the freedom of up and down movement. The bottom of the sleeve 811 is fixedly connected to the bevel gear 1 814. The interior of the base 1 is movably installed with four annularly distributed bevel gears 2 815. The bevel gear 1 814 and the bevel gear 2 815 are meshed with each other. When the rotation When the shaft 816 rotates, the bevel gear 1 814 and the sleeve 811 are driven to rotate through the bevel gear 2 815. The outer wall of the bevel gear 2 815 is fixedly connected with the rotating shaft 816. The end of the rotating shaft 816 away from the bevel gear 2 815 extends to the outer wall of the base 1, which is convenient for external operation and rotation. A fixing component 9 is installed between the base 1 and the sleeve 811. The fixing component 9 is used to lock or unlock the sleeve 811 to meet the requirements of different adjustment modes. The rotation resistance of the sleeve 811 mainly comes from the thread friction between the screw rod 809 and the screw hole of the gear 1 808. The distance is small and the lubrication is sufficient, and its resistance torque is extremely low. The fixing component 9 drives the torque amplification path of the motor 2 901, the gear 2 902, and the rotating disk 903, combined with the wedge force conversion mechanism of the arc groove 908, so that the four clamping blocks 905 synchronously output high clamping force. The contact area and friction coefficient design of the clamping groove 9051 and the sleeve 811 ensure that the static friction torque far exceeds the rotational resistance torque of the sleeve 811, which can completely suppress accidental rotation. In addition, the linear guidance of the support rod 2 907 in the straight groove 909 eliminates clamping deflection and further ensures locking stability.

[0026] A cross slot 817 is formed on one end of the rotating shaft 816 located on the outer wall of the base 1. The cross slot 817 facilitates insertion of a cross screwdriver to manually rotate the rotating shaft 816, providing the convenience of manual operation for individually adjusting a single oil chamber, which is particularly useful during equipment commissioning and maintenance.

[0027] The top of the screw rod 809 is fixedly connected with a movable head 818, and the movable head 818 is movably installed at the bottom of the lifting rod 803. The movable head 818 allows the lifting rod 803 to rotate. When the screw rod 809 rotates, the movable connection structure of the movable head 818 can prevent the lifting rod 803 from rotating with the screw rod 809, ensuring that the lifting rod 803 only moves up and down in the vertical direction, ensuring that the guide shaft 804 slides smoothly in the inclined groove 805, realizing stable movement of the movable plate 802 and the adjustment plate 801, and improving the adjustment accuracy.

[0028] The fixed assembly 9 includes a second drive motor 901, a second gear 902, a rotating disk 903, a tooth groove 904, and a clamping block 905. The outer wall of the second base 2 is fixedly mounted with the second drive motor 901, which serves as the power source of the fixed assembly 9. The output end of the second drive motor 901 is fixedly mounted with the second gear 902. The rotating disk 903 is rotatably mounted inside the second base 2. The outer wall of the rotating disk 903 is provided with multiple tooth grooves 904. The second gear 902 and the tooth grooves 904 are meshed with each other. When the second drive motor 901 is started, it drives the second gear 902 to rotate, thereby rotating the rotating disk 903. Four annularly distributed clamping blocks 905 are slidably mounted inside the second base 2. The clamping blocks 905 are used to clamp or release the sleeve 811.

[0029] The fixing assembly 9 also includes support rod 1 906, support rod 2 907, arc groove 908 and straight groove 909. The bottom of the clamping block 905 is fixedly connected to support rod 1 906, and the top of the clamping block 905 is fixedly connected to support rod 2 907. Four arc grooves 908 distributed in an annular manner are opened inside the rotating disk 903, and four straight grooves 909 distributed in an annular manner are opened inside the base 2. Support rod 1 906 is located inside the arc groove 908, and support rod 2 907 is located inside the straight groove 909. When the rotating disk 903 rotates, the arc groove 908 guides the clamping block 905 to move radially through support rod 1 906, and the straight groove 909 limits the moving direction of the clamping block 905 through support rod 2 907, ensuring that the four clamping blocks 905 move synchronously and stably toward the center or outward, thereby achieving uniform clamping and reliable locking of the sleeve 811.

[0030] A clamping groove 9051 is provided on the outer wall of the clamping block 905, and the sleeve 811 is located on the inner wall of the clamping groove 9051. The clamping groove 9051 matches the outer wall of the sleeve 811. When the clamping block 905 moves toward the center, the inner wall of the clamping groove 9051 fits tightly against the outer wall of the sleeve 811, and the sleeve 811 is fixed by friction and mechanical clamping force. When the clamping block 905 moves outward, the clamping groove 9051 separates from the sleeve 811, and the sleeve 811 obtains rotational freedom.

[0031] The inner wall of the stator ring 3 is provided with four annular mounting grooves 16, and a plurality of rollers 17 are movably installed inside the mounting grooves 16. The mounting grooves 16 provide mounting positions for the rollers 17. During normal operation, the rotor shaft 4 rotates stably under the support of the oil film and does not contact the rollers 17. When the rotor shaft 4 deviates at a large angle due to sudden situations such as huge impact force, processing overload or accidental collision, the outer wall of the rotor shaft 4 contacts the rollers 17. The rollers 17 support the rotor shaft 4 through rolling friction, avoiding wear or damage caused by direct rigid contact between the rotor shaft 4 and the stator ring 3, thereby providing safety protection for the turntable under extreme working conditions.

[0032] A sealing ring 15 is fixedly installed between the base 2 and the stator ring 3. The sealing ring 15 is installed at the joint of the base 2 and the stator ring 3 to play a sealing role, preventing oil leakage from the joint, ensuring the stable circulation of oil inside the turntable and the formation of a lubricating oil film, and at the same time preventing external dust, impurities, etc. from entering the turntable, protecting internal components from pollution, and extending the service life of the turntable.

[0033] A plurality of connecting blocks 18 are fixedly installed on the outer walls of the base 1, the base 2, and the stator ring 3. Bolts 19 are threadedly installed between the connecting blocks 18 and the base 1, the base 2, and the stator ring 3. The connecting blocks 18 tightly connect the base 1, the base 2, and the stator ring 3 together through the bolts 19 to form a stable overall structure. The threaded connection method of the bolts 19 provides reliable connection strength, ensuring that during the operation of the turntable, there will be no relative displacement between the components, ensuring the stability and accuracy of the turntable, and facilitating the installation, disassembly and maintenance of the equipment.

[0034] Working principle: During use, when it is necessary to adjust the thickness of the thickened oil film in the thickened oil chamber 7, turn on the driving motor 2 901, and the output shaft of the driving motor 2 901 drives the gear 2 902 to rotate, and the gear 2 902 engages with the tooth groove 904 on the outer wall of the rotating disk 903 to rotate the rotating disk 903, and the arc groove 908 inside the rotating disk 903 cooperates with the support rod 1 906 at the bottom of the clamping block 905. Under the arc guidance of the arc groove 908, the support rod 1 906 drives the clamping block 905 to move radially toward the center. At the same time, the support rod 2 907 makes a linear motion in the straight groove 909 inside the base 2 2 to ensure that the clamping block 905 moves smoothly, and finally makes the inner wall of the clamping groove 9051 of the clamping block 905 tightly fit the outer wall of the sleeve 811, thereby fixing the sleeve 811 and avoiding the adjustment accuracy affected by the rotation of the sleeve 811.

[0035] Then, the drive motor 806 is turned on, and the output shaft of the drive motor 806 drives the gear plate 807 to rotate. The gear plate 807 meshes with the four gears 808, so that the gear 808 rotates. The screw hole inside the gear 808 is threadedly matched with the screw rod 809. As the gear 808 rotates, the screw rod 809 moves upward in the screw hole. At the same time, the guide shaft 2 813 on the connecting rod 810 at the bottom of the screw rod 809 slides in the guide groove 812 inside the sleeve 811. The guide groove 812 supports and guides the movement of the guide shaft 2 813, ensuring that the screw rod 809 moves upward smoothly. The movable head 818 at the top of the screw rod 809 is in contact with the lifting The bottom of the lowering rod 803 is movably connected, driving the lifting rod 803 to move upward, and the guide shaft 804 on the top of the lifting rod 803 slides in the inclined groove 805 of the movable plate 802. Since the inclined groove 805 has a certain inclination angle, the upward movement of the guide shaft 804 prompts the movable plate 802 and the adjustment plate 801 to move toward the center of the thickened oil chamber 7, reducing the space of the thickened oil chamber 7, thereby reducing the oil film thickness. At the same time, the threaded fit between the screw rod 809 and the screw hole is self-locking, which can prevent the adjustment plate 801 from accidentally displacing due to changes in external loads, ensure the stability of the oil film thickness after adjustment, and realize the synchronous adjustment of the oil film thickness of multiple thickened oil chambers 7.

[0036] Then, the external lubricating oil supply system injects the lubricating oil into the turntable through the oil inlet pipe 10. The lubricating oil first enters the upper oil channel 12 on the left. Under the action of pressure, the oil flows along the upper oil channel 12. Then, the oil is diverted through the connecting channel and discharged into the oil chamber 6 and the thickened oil chamber 7. Inside these two cavities, the oil forms a stable oil film and a thickened oil film, tightly wrapping the rotor shaft 4, providing it with high-precision support and lubrication, greatly reducing the friction resistance of the rotor shaft 4 during rotation, ensuring the rotation accuracy, and the oil after forming the oil film continues to flow through the connecting channel into the left lower oil channel 1 13 and the lower oil channel 2 14, and then discharged into between the base 2 2 and the rotor shaft 4, forming an auxiliary oil film, further enhancing the support effect on the rotor shaft 4 and improving the bearing capacity of the turntable. Afterwards, the oil enters the lower oil channel 1 13 on the right, and the oil enters the right upper oil channel 12 through the right connecting channel, is discharged from the turntable through the oil drain pipe 11, and flows back to the external oil return system, completing the circulation process of the entire oil circuit.

[0037] If a greater polishing pressure is applied to one side of the lens when polishing the lens, the rotor shaft 4 may deviate to one side. At this time, by driving the motor 2 901 to rotate in the opposite direction, the gear 2 902 drives the rotating disk 903 to rotate in the opposite direction, and the clamping block 905 moves outward with the cooperation of the support rod 1 906 and the arc groove 908, and the support rod 2 907 and the straight groove 909, loosening the clamping of the sleeve 811 and unlocking the fixing component 9.

[0038] Then, the operator uses a cross screwdriver to insert the rotating shaft 816 into the cross slot 817 on the outer wall of the base 1, and rotates the rotating shaft 816. The rotating shaft 816 drives the bevel gear 2 815 to rotate, and the bevel gear 2 815 meshes with the bevel gear 1 814, so that the bevel gear 1 814 and the sleeve 811 rotate. The guide groove 812 inside the sleeve 811 cooperates with the guide shaft 2 813 at the bottom of the connecting rod 810. When the sleeve 811 rotates, the guide shaft 2 813 slides along the guide groove 812, and the guide screw 809 rotates. 806 is not started, and the gear 808 is kept stationary by the meshing of the toothed disc 807. The screw 809 is threadedly mounted in the threaded hole of the gear 808. Therefore, the rotational motion of the screw 809 is converted into upward linear motion. The screw 809 is connected to the lifting rod 803 via a movable head 818. The movable head 818 allows the lifting rod 803 to move vertically upward instead of rotating as the screw 809 rotates. This controls the oil thickness of the thickened oil chamber 7 on one side. By increasing the oil film thickness of the thickened oil chamber 7 on that side, the pressure in the oil chamber on that side is increased, effectively counteracting the grinding pressure, correcting the deviation of the rotor shaft 4, and achieving dynamic balance of the rotor shaft 4.

[0039] During use, under normal working conditions, the rotor shaft 4 is supported by the stable lubricating oil film in the oil chamber 6 and the thickened oil chamber 7 to maintain high-precision rotation. At this time, the roller 17 does not contact the rotor shaft 4 and will not interfere with the normal operation of the turntable, ensuring that the turntable can complete the ultra-precision processing task of the optical mirror with the designed accuracy.

[0040] When encountering an emergency, such as equipment failure, external impact, etc. during the processing process, the rotor shaft 4 is subjected to a force far exceeding the normal working load, causing a large angle deviation, the outer wall of the rotor shaft 4 will quickly contact the roller 17. The roller 17 has good rolling flexibility in the installation groove 16. When the two are in contact, the roller 17 disperses the deviation force of the rotor shaft 4 to multiple rollers 17 through rolling friction. This dispersion mechanism avoids direct rigid collision between the rotor shaft 4 and the inner wall of the stator ring 3, prevents the two from severe wear or even structural damage due to the collision, and effectively protects the core components of the turntable.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A large-scale surface throttling self-compensating ultra-precision hydrostatic turntable, comprising a first base, a second base fixedly mounted on the top of the first base, a stator ring fixedly mounted on the top of the second base, a rotor shaft movably mounted inside the stator ring, and a connecting plate fixedly mounted on the top of the rotor shaft, characterized in that: An oil cavity and four annularly distributed thickened oil cavities are provided inside the stator ring. The oil cavity and the four thickened oil cavities are communicated with each other. The rotor shaft is located inside the oil cavity. An adjustment component is installed inside the thickened oil cavity. An oil inlet pipe is fixedly connected to the left side of the outer wall of the stator ring, and an oil drain pipe is fixedly connected to the right side of the outer wall of the stator ring. Two upper oil passages distributed left and right are opened inside the stator ring. Two lower oil passages 1 distributed left and right are opened on the lower surface of the stator ring, and a connecting passage is opened between the upper oil passages and the lower oil passages 1 on the same side. Two lower oil passages 2 distributed left and right are opened on the upper surface of the second base, and the lower oil passages 1 and 2 on the same side correspond to each other. The upper oil passage on the left side is connected to the oil inlet pipe, and the upper oil passage on the right side is connected to the oil drain pipe. Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The adjusting assembly also includes a connecting rod, a sleeve, a guide groove, a guide shaft 2, a bevel gear 1, a bevel gear 2 and a rotating shaft. The bottom of the screw rod is fixedly connected to the connecting rod, and a sleeve is rotatably installed between the base 1 and the base 2. The connecting rod is slidably installed inside the sleeve, and a guide groove is provided inside the sleeve. The bottom of the connecting rod is fixedly connected to the guide shaft 2, and the guide shaft 2 is slidably installed inside the guide groove. The bottom of the sleeve is fixedly connected to the bevel gear 1, and four bevel gears 2 distributed in a ring are movably installed inside the base 1. The bevel gear 1 and the bevel gear 2 are meshed with each other. The outer wall of the bevel gear 2 is fixedly connected to the rotating shaft, and the rotating shaft extends to the outer wall of the base 1 away from one end of the bevel gear 2. A fixed assembly is installed between the base 1 and the sleeve.

2. A large-scale surface throttling self-compensating ultra-precision hydrostatic turntable according to claim 1, characterized in that: A cross groove is formed on one end of the rotating shaft located on an outer wall of the base.

3. The large-scale surface throttling self-compensating ultra-precision hydrostatic turntable according to claim 1, characterized in that: The top of the screw rod is fixedly connected with a movable head, and the movable head is movably installed on the bottom of the lifting rod.

4. The large-scale surface throttling self-compensating ultra-precision hydrostatic turntable according to claim 1, characterized in that: The fixed component includes a second drive motor, a second gear, a rotating disk, a tooth groove and a clamping block. The second drive motor is fixedly installed on the outer wall of the second base, and the second gear is fixedly installed on the output end of the second drive motor. The second base is internally rotatably installed with a rotating disk, and the outer wall of the rotating disk is provided with a plurality of tooth grooves. The second gear is engaged with the tooth grooves, and four clamping blocks distributed in a ring are slidably installed inside the second base.

5. A large-scale surface throttling self-compensating ultra-precision hydrostatic turntable according to claim 4, characterized in that: The fixing assembly also includes support rod 1, support rod 2, an arc-shaped groove and a straight groove. The bottom of the clamping block is fixedly connected to support rod 1, the top of the clamping block is fixedly connected to support rod 2, four arc-shaped grooves distributed in an annular shape are opened inside the rotating disk, and four straight grooves distributed in an annular shape are opened inside the base 2. Support rod 1 is located inside the arc-shaped groove, and support rod 2 is located inside the straight groove.

6. A large-scale surface throttling self-compensating ultra-precision hydrostatic turntable according to claim 4, characterized in that: The outer wall of the clamping block is provided with a clamping groove, and the sleeve is located on the inner wall of the clamping groove.

7. The large-scale surface throttling self-compensating ultra-precision hydrostatic turntable according to claim 1, characterized in that: The inner wall of the stator ring is provided with four annularly distributed mounting grooves, and a plurality of rollers are movably mounted inside the mounting grooves.

8. The large-scale surface throttling self-compensating ultra-precision hydrostatic turntable according to claim 1, characterized in that: A sealing ring is fixedly installed between the second base and the stator ring.

9. The large-scale surface throttling self-compensating ultra-precision hydrostatic turntable according to claim 1, characterized in that: A plurality of connecting blocks are fixedly installed on the outer walls of the base 1, the base 2 and the stator ring, and bolts are threadedly installed between the connecting blocks and the base 1, the base 2 and the stator ring.

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