CN105424361A - Liquid closed-type static-pressure rotary table experiment apparatus of changeable restrictor - Google Patents
Liquid closed-type static-pressure rotary table experiment apparatus of changeable restrictor Download PDFInfo
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- CN105424361A CN105424361A CN201510921374.1A CN201510921374A CN105424361A CN 105424361 A CN105424361 A CN 105424361A CN 201510921374 A CN201510921374 A CN 201510921374A CN 105424361 A CN105424361 A CN 105424361A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
Abstract
The invention discloses a liquid closed-type static-pressure rotary table experiment apparatus of changeable restrictors. According to an oil pad position, the restrictors are arranged on an outer side of a rotary table of a corresponding position respectively. Each restrictor is sealed through a sealing ring and is fixed through four long bolts. The number of each kind of the restrictors is eight. The different restrictors are changed and dynamic and static tests are performed on the restrictors respectively. An eddy current displacement sensor, a pressure sensor and a temperature sensor are used to measure oil chamber pressure, an oil film thickness and an oil chamber temperature respectively. An acceleration sensor is used to test a vibration mode of a rotary table working bench. A flowmeter arranged at a rotary table oil inlet is used to measure an oil liquid inlet flow. A pressure gauge on a fuel tank is used to measure oil supply pressure of a static-pressure rotary table. By using the experiment apparatus, convenience is provided for researching influences of the different restrictors on static-pressure rotary table bearing performance; material cost is saved and guarantees are provided for solving a problem in engineering, optimizing a structure parameter of the rotary table and increasing workpiece processing precision.
Description
Technical field
The present invention is a kind of liquid closed type static pressure turntable experimental provision of modifiable flow controller, belongs to machine design and manufacture field.
Background technology
The construction of innovation ability is the important content of " high-grade, digitally controlled machine tools and basic manufacturing equipment " national major scientific and technological project.Since 2010, numerical control special project layout comprises high speed compound numerically-controlled machine, precision and ultra-precision machining, grinding, Gear Processing, the construction of more than ten the innovation ability platform such as cutter and digital control system, static pressure turntable is the key feature of accurate ultra numerically-controlled machine, it play supporting role to workpiece and drives it to carry out high-precision rotary motion, owing to having low friction, high bearing capacity, at precision machine tool, Aero-Space, boats and ships, the fields such as heavy-duty machinery are widely used, its load-carrying properties, dynamic property and stability have important impact for the working ability of precision machine tool and machining precision.Be in particular in: static pressure turntable in operation process due to the foozle of its guide pass, the vibration that the factors such as offset placed load cause also can strengthen, unbalance loading is serious, the probability that guide pass can be caused to contact with lubricating pad increases, and then cause oil film to lose efficacy, affect turntable normally to run, in addition, the fluctuation of charge oil pressure, the distortion of turntable work top etc. all can run on turntable the crudy having an impact and then affect workpiece, so need the rotational speed analysing in depth turntable, foozle, unbalance loading, the factors such as guide pass distortion are to the affecting laws of static pressure turntable sound state, dissect the restraining factors affecting turntable continuous service, form the quiet dynamic analysis theories of a set of accurate ultra static pressure turntable system.
What accurate ultra static pressure turntable generally adopted is constant-pressure type fuel feeding, and flow controller is as the vitals of constant-pressure type static pressure turntable, the direct sound performance affecting static pressure turntable, the present invention is mainly for a fluid pressure rotation table device, devise a kind of device of modifiable flow controller, different flow controller type can be studied at different operating pressure, rotating speed, to the affecting laws of static pressure turntable load-carrying properties under the operating modes such as unbalance loading, reduce the processing and use cost of setting up static pressure turntable test experiments platform, for development high-mechanic, high-precision accurate ultra static pressure turntable provides foundation.
Summary of the invention
The present invention devises a kind of liquid closed type static pressure turntable experimental provision of modifiable flow controller mainly for static pressure turntable basic research invention, can realize the replacing of capillary restrictor, orifice restriction device and the membrane feedbacks the flow controller and carry out dynamic test.
Technical matters to be solved by this invention adopts following technical scheme to realize.
A kind of liquid closed type static pressure turntable experimental provision of modifiable flow controller, this device comprises liquid closed type static pressure turntable system and dynamic signal acquisition disposal system, the fluid pressure turntable of liquid closed type static pressure turntable system supports lubricating pad by circle, annular preloads lubricating pad, transverse bearing three part is formed, wherein circular thrust lubricating pad provides supporting, annular thrust lubricating pad provides pretension, form enclosed supporting structure, add the rigidity of static pressure turntable, two the four chamber transverse bearings installed control radial displacement and the upsetting moment of turntable, supporting lubricating pad can provide supporting by different flow controller, transverse bearing adopts circular bosses gap flow controller, be evenly distributed on the madial wall of turntable body, oil supply system is equipped with two motors, and Electric Machine Control gear-type pump is fluid from coarse filter, and through retaining valve, fine filter flow in static pressure turntable system, and another Electric Machine Control gear-type pump realizes fluid and forces oil return.Oil supply system is furnished with temperature-controlling cabinet, makes fluid cryogenic temperature control at 23 degree; Kinematic train is delivered on main shaft by driven by motor polywedge bet after reduction of speed; By structural design, flow controller is installed to the external side of turntable, be convenient for changing, capillary restrictor, orifice restriction device and the membrane feedbacks the flow controller can be adopted respectively, each flow controller is made up of two parts, a part is base, another part is throttling part, is connected, be separately fixed on the outside surface of turntable body with four large screws by four Screws; Flowmeter and tensimeter are separately positioned on turntable oil-in and fuel tank, are used for measuring the charge oil pressure of fluid inlet flow rate and static pressure turntable; Rotary table base provides lays turntable and proving installation.
The liquid closed type static pressure turntable experimental provision of modifiable flow controller comprises a dynamic signal acquisition disposal system, and this system comprises vibrator, force snesor, eddy current displacement sensor, temperature sensor, pressure transducer and LMS signal acquiring system and PC.Vibrator one end is by stationary installation tightrope free suspension, and the other end is placed on static pressure rotary worktable by magnetic support, and Position of Vibrating is, by LMS signal acquiring system output drive signal through power amplifier control vibrator frequency; Force snesor is arranged on the connecting link of vibrator, and then signal feedback is input to LMS signal acquiring system to signal preamplifier, then with delivering to PC; The probe of pressure transducer imbeds turntable body lubricating pad oil pocket inside, eight terminations are stretched out in outer end, conveniently connect and arrange, and take encapsulation way to external connection part, one end Bonding pressure sensor output, the other end is directly connected to LMS data acquisition system (DAS) by Data In-Line; The probe of temperature sensor imbeds turntable body lubricating pad oil pocket inside, and output terminal can connect digital display, also can be connected to LMS data acquisition system (DAS) by conversion equipment; Electric vortex displacement sensor probe is carved with screw thread, and being goed deep into by probe in magnetic support hole and to point to worktable bottom surface, magnetic support is connected by screw and is fixed on turntable body; Acceleration transducer eight passes through magnetic support uniform adsorption on static pressure turntable rotary table, and corresponding with each lubricating pad position, is used for carrying out mould measurement to worktable.
A kind of liquid closed type static pressure turntable experimental provision of modifiable flow controller, this device comprises liquid closed type static pressure turntable system and dynamic signal acquisition disposal system, described liquid closed type static pressure turntable system is arranged on (12) on static pressure turntable pedestal, comprises rotary table (1), turntable body (2), circular bosses gap flow controller (3), replaceable flow controller (4), axis system (8) and circular static pressure oil pad (37).
The turntable body (2) of liquid closed type static pressure turntable system supports lubricating pad by circle, annular preloads lubricating pad, transverse bearing three part is formed, wherein circular thrust lubricating pad provides supporting, annular thrust lubricating pad provides pretension, form enclosed supporting structure, add the rigidity of turntable body (2), two the four chamber transverse bearings installed control radial displacement and the upsetting moment of turntable, supporting lubricating pad can provide supporting by different flow controller, transverse bearing adopts circular bosses gap flow controller, is evenly distributed on the madial wall of turntable body.
Described circular static pressure oil pad (37) totally eight be evenly distributed and be arranged on turntable body (2), and by level pressure oil supply system (26) fuel feeding; Static pressure oil pad (37) places rotary table (1) above, worktable is connected with main shaft (8) bolt, main shaft (8) realizes location and opposing tipping load by the four chamber transverse bearing (38) of two on turntable body, and hydraulic oil enters transverse bearing by circular bosses gap flow controller (3); Annular hydrostatic bearing (39) is installed bottom static pressure turntable main shaft, forms closed type structure with supporting lubricating pad; Rotary table (1) is placed in rotary table base (12).
Described main shaft (8) is the motion adopting polywedge bet reduction of speed to transmit by kinematic train.
Described level pressure oil supply system (26) is that hydraulic oil flows into replaceable flow controller (4) through retaining valve (31), fine filter (27) through oil suction coarse filter (32) again by motor (30) driven gear pump (29), and final inflow lubricating pad oil pocket (14) is inner; Pressure fixing system is furnished with surplus valve, oil return and pressure return oil system, forces oil return to be realized by motor driven gear pump; Oil supply system is furnished with temperature-controlling cabinet, and cryogenic temperature controls at 23 degree.
By replaceable flow controller (4) being installed to the external side of turntable to the structural design of static pressure turntable, be convenient for changing, replaceable flow controller (4) be capillary restrictor (35), orifice restriction device (34), the membrane feedbacks the flow controller (36); Capillary restrictor (35), orifice restriction device (34), the membrane feedbacks the flow controller (36) are all made up of two parts, a part is base, another part is throttling part, connected by four Screws, be separately fixed in (33) on the outside surface of turntable body with four large screws.
Dynamic signal acquisition disposal system comprises vibrator (19), force snesor (20), eddy current displacement sensor (5), temperature sensor (6), pressure transducer (7), LMS signal acquiring system and PC.
Vibrator (19) one end is by stationary installation tightrope free suspension, the other end is placed on static pressure rotary worktable (1) by magnetic support, Position of Vibrating is (16), by LMS signal acquiring system output drive signal through power amplifier control vibrator frequency.Force snesor (20) is arranged on the connecting link of vibrator (19), and then signal feedback is input to LMS signal acquiring system to signal preamplifier, then with delivering to PC.
The probe of pressure transducer (7) imbeds turntable body lubricating pad oil pocket (14) inside, eight terminations are stretched out in outer end, for convenience of connecting and arranging, encapsulation way is taked to external connection part, one end Bonding pressure sensor output, the other end is directly connected to LMS data acquisition system (DAS) by Data In-Line.
The probe of temperature sensor (6) imbeds turntable body lubricating pad oil pocket (14) inside, and output terminal connects digital display, is also connected to LMS data acquisition system (DAS) by conversion equipment.
Eddy current displacement sensor (5) probe is carved with screw thread, and being goed deep into by probe in magnetic support hole and to point to worktable bottom surface, magnetic support is connected by screw and is fixed on turntable body.
Acceleration transducer (17) eight by magnetic support uniform adsorption on static pressure turntable rotary table (1), and corresponding with each static pressure oil pad (37) position, be used for the vibration shape of test table.
The experimental provision of relatively existing static pressure turntable, the present invention has the following advantages:
1, this device can change different flow controller.
2, this device can by applying the dynamic response of dynamic load (step load, sinusoidal loading etc.) test static pressure turntable under unbalance loading or different excited frequency; Gantry rotation velocity probe temperature and speed can be changed on the impact of turntable static and dynamic performance; Mould measurement can be carried out to static pressure turntable by acceleration transducer.
3, this apparatus structure is compact, and cost is low, for static pressure turntable basic research provides a good experiment test platform.
Accompanying drawing explanation
Fig. 1 is the synthesis experiment platform schematic diagram that the present invention changes the liquid closed type static pressure turntable experimental provision of flow controller.
Fig. 2 is a) distribution plan of eight circular lubricating pads on static pressure turntable turntable body of the present invention.
Fig. 2 b) be the installation site figure of eddy current displacement sensor of the present invention.
Fig. 2 c) be the installation site figure of pressure transducer of the present invention.
Fig. 2 d) be the installation site figure of temperature sensor of the present invention.
Fig. 3 is the riding position figure of acceleration transducer of the present invention and impacting point.
Fig. 4 is that the present invention changes dynamic signal acquisition disposal system schematic diagram in the liquid closed type static pressure turntable experimental provision of flow controller.
Fig. 5 is the oil supply system structural representation that the present invention changes the liquid closed type static pressure turntable experimental provision of flow controller
Fig. 6 is each flow controller structural drawing and installation site figure thereof in the present invention.
Fig. 7 is the location drawing of circular static pressure oil pad in the present invention, transverse bearing and annular static pressure oil pad.
In figure: 1. rotary table; 2. turntable body; 3. circular bosses gap flow controller; 4. flow controller; 5. eddy current displacement sensor; 6. temperature sensor; 7. pressure transducer; 8. axis system; 9. data connecting line; 10.LMS data acquisition system (DAS); 11.PC machine; 12. static pressure turntable pedestals; 13. circular static pressure oil pad sealing oil edges; 14. circular static pressure oil pad oil pockets; 15. oil-recovery tanks; 16. impacting point positions; 17. acceleration transducers; 18. tightropes; 19. vibrators; 20. force snesor; 21. data connecting lines; 22. to static pressure turntable in-line; 23. adjustable pressure tables; 24. return lines; 25. force return line; 26. level pressure oil supply systems; 27. fine filters; 28. surplus valves; 29. gear-type pumps; 30. motors; 31. retaining valves; 32. coarse filters; 33. flow controller installation sites; 34. orifice restriction devices; 35. capillary restrictors; 36. the membrane feedbacks the flow controllers; 37. circular static pressure oil pads; 38. transverse bearings; 39. annular static pressure oil pads
Embodiment
Below in conjunction with principle of work and Structure Figure, the liquid closed type static pressure turntable experimental provision to modifiable flow controller of the present invention elaborates.
As Fig. 1, a kind of liquid closed type static pressure turntable experimental provision of modifiable flow controller, it is characterized in that: described static pressure turntable device is arranged on static pressure turntable pedestal, comprise rotary table 1, turntable body 2, circular bosses gap flow controller 3, replaceable flow controller 4, axis system 8 and circular static pressure oil pad 37; As Fig. 2 and Fig. 7, circular static pressure oil pad 37 totally eight be evenly distributed and be arranged on turntable body 2, and by level pressure oil supply system 26 fuel feeding, it places rotary table 1, worktable is connected with main shaft 8 bolt, main shaft 8 realizes location and opposing tipping load, by polywedge bet reduction of speed transmission campaign by two four chamber transverse bearings 38 on turntable body; Hydraulic oil enters transverse bearing by circular bosses gap flow controller 3, is provided with annular hydrostatic bearing 39 bottom static pressure turntable main shaft, forms closed type structure with supporting lubricating pad; Turntable body is placed in rotary table base 12; As Fig. 5, level pressure oil supply system 26 is that hydraulic oil flows into flow controller 4 through retaining valve 31, fine filter 27 through oil suction coarse filter 32 again by motor 30 driven gear pump 29, and final inflow lubricating pad oil pocket 14 is inner; Pressure fixing system is furnished with surplus valve, oil return and pressure return oil system, and force oil return to be realized by motor driven gear pump, oil supply system is furnished with temperature-controlling cabinet, controls fluid cryogenic temperature 23 degree; As Fig. 6, by flow controller 4 being installed to the external side of turntable to the structural design of static pressure turntable, be convenient for changing, removable flow controller is respectively capillary restrictor 35, orifice restriction device 34 and the membrane feedbacks the flow controller 36, each flow controller is made up of two parts, and a part is base, and another part is throttling part, connected by four Screws, on the outside surface being separately fixed in turntable body with four large screws 33; As Fig. 4, dynamic signal acquisition disposal system comprises vibrator 19, force snesor 20, eddy current displacement sensor 5, temperature sensor 6, pressure transducer 7, LMS signal acquiring system and PC.Vibrator 19 one end is by stationary installation tightrope free suspension, and the other end is placed on static pressure rotary worktable 1 by magnetic support, and Position of Vibrating is 16, by LMS signal acquiring system output drive signal through power amplifier control vibrator frequency.Force snesor 20 is arranged on the connecting link of vibrator 19, and then signal feedback is input to LMS signal acquiring system to signal preamplifier, then with delivering to PC.As Fig. 2 c), the probe of pressure transducer 7 imbeds turntable body lubricating pad oil pocket 14 inside, eight terminations are stretched out in outer end, conveniently connect and arrange, encapsulation way is taked to external connection part, one end Bonding pressure sensor output, the other end is directly connected to LMS data acquisition system (DAS) by Data In-Line; As Fig. 2 d) to imbed turntable body lubricating pad oil pocket 14 inner for the probe of temperature sensor 6, and output terminal can connect digital display, also can be connected to LMS data acquisition system (DAS) by conversion equipment; As Fig. 2 b), eddy current displacement sensor 5 is carved with screw thread on popping one's head in, and being goed deep into by probe in magnetic support hole and to point to worktable bottom surface, magnetic support is connected by screw and is fixed on turntable body; As Fig. 3, acceleration transducer 17 8 by magnetic support uniform adsorption on static pressure turntable rotary table 1, and corresponding with each circular static pressure oil pad 37 position, be used for the vibration shape of test table.
In dynamic testing process, first eddy current displacement sensor 5 to be fixed on the correspondence position of each hydrostatic support lubricating pad 37, magnetic support is connected by screw and is fixed on turntable body 2, sensor 5 is carved with screw thread on popping one's head in, probe is goed deep in magnetic support hole, two ends attaching nut finger or pliers clamp with fixing, until sensor probe end face is close to the lower surface of rotary table 1.By applying dynamic load, test different loads power and load position are to the dynamic response of turntable load-carrying properties; By setting turntable rotating speed and time, test oil temperature is on the impact of turntable bearer properties.
Utilize this device can do dynamic characteristic test experiment, detailed process is as follows:
(1) first on the magnetic support of turntable body side surface, eddy current displacement sensor is installed, is used for the floatation volume of surveying work platform.
(2) to static pressure turntable system fuel feeding, after turntable worktable floats, the time dependent curve of oil film floatation volume of each lubricating pad of turntable is obtained.
(3) reach steadily when the worktable of turntable floats, to turntable dynamic load, the oil film thickness of each lubricating pad under will receiving this operating mode by dynamic signal acquisition disposal system, oil pocket pressure curve over time, diverse location is set, the dynamic load of different size, under will obtaining different operating mode, each lubricating pad is about time dependent curves such as oil film thickness and oil pocket pressure.
(4) by vibrator exciting, change the excited frequency of vibrator, through acceleration transducer by signal feedback to signal acquiring system, the characteristics of mode of static pressure turntable can be obtained.
(5) turntable is made to rotate with certain rate over time, oil temperature will raise, to obtain in turntable lubricating pad the change of oil pocket pressure, oil film thickness change and temperature rise respectively by eddy current displacement sensor, pressure transducer and temperature sensor, and then the change curve of the turntable bearer properties caused due to speed can be obtained.
Claims (3)
1. the liquid closed type static pressure turntable experimental provision of a modifiable flow controller, it is characterized in that: this device comprises liquid closed type static pressure turntable system and dynamic signal acquisition disposal system, described liquid closed type static pressure turntable system is arranged on (12) on static pressure turntable pedestal, comprises rotary table (1), turntable body (2), circular bosses gap flow controller (3), replaceable flow controller (4), axis system (8) and circular static pressure oil pad (37);
The turntable body (2) of liquid closed type static pressure turntable system supports lubricating pad by circle, annular preloads lubricating pad, transverse bearing three part is formed, wherein circular thrust lubricating pad provides supporting, annular thrust lubricating pad provides pretension, form enclosed supporting structure, add the rigidity of turntable body (2), two the four chamber transverse bearings installed control radial displacement and the upsetting moment of turntable, supporting lubricating pad can provide supporting by different flow controller, transverse bearing adopts circular bosses gap flow controller, is evenly distributed on the madial wall of turntable body;
Described circular static pressure oil pad (37) totally eight be evenly distributed and be arranged on turntable body (2), and by level pressure oil supply system (26) fuel feeding; Static pressure oil pad (37) places rotary table (1) above, worktable is connected with main shaft (8) bolt, main shaft (8) realizes location and opposing tipping load by the four chamber transverse bearing (38) of two on turntable body, and hydraulic oil enters transverse bearing by circular bosses gap flow controller (3); Annular hydrostatic bearing (39) is installed bottom static pressure turntable main shaft, forms closed type structure with supporting lubricating pad; Rotary table (1) is placed in rotary table base (12);
Described main shaft (8) is the motion adopting polywedge bet reduction of speed to transmit by kinematic train;
Described level pressure oil supply system (26) is that hydraulic oil flows into replaceable flow controller (4) through retaining valve (31), fine filter (27) through oil suction coarse filter (32) again by motor (30) driven gear pump (29), and final inflow lubricating pad oil pocket (14) is inner; Pressure fixing system is furnished with surplus valve, oil return and pressure return oil system, forces oil return to be realized by motor driven gear pump; Oil supply system is furnished with temperature-controlling cabinet, and cryogenic temperature controls at 23 degree;
By replaceable flow controller (4) being installed to the external side of turntable to the structural design of static pressure turntable, be convenient for changing, replaceable flow controller (4) be capillary restrictor (35), orifice restriction device (34), the membrane feedbacks the flow controller (36); Capillary restrictor (35), orifice restriction device (34), the membrane feedbacks the flow controller (36) are all made up of two parts, a part is base, another part is throttling part, connected by four Screws, be separately fixed in (33) on the outside surface of turntable body with four large screws;
Dynamic signal acquisition disposal system comprises vibrator (19), force snesor (20), eddy current displacement sensor (5), temperature sensor (6), pressure transducer (7), LMS signal acquiring system and PC;
Vibrator (19) one end is by stationary installation tightrope free suspension, the other end is placed on static pressure rotary worktable (1) by magnetic support, Position of Vibrating is (16), by LMS signal acquiring system output drive signal through power amplifier control vibrator frequency; Force snesor (20) is arranged on the connecting link of vibrator (19), and then signal feedback is input to LMS signal acquiring system to signal preamplifier, then with delivering to PC;
The probe of pressure transducer (7) imbeds turntable body lubricating pad oil pocket (14) inside, eight terminations are stretched out in outer end, for convenience of connecting and arranging, encapsulation way is taked to external connection part, one end Bonding pressure sensor output, the other end is directly connected to LMS data acquisition system (DAS) by Data In-Line;
The probe of temperature sensor (6) imbeds turntable body lubricating pad oil pocket (14) inside, and output terminal connects digital display, is also connected to LMS data acquisition system (DAS) by conversion equipment;
Eddy current displacement sensor (5) probe is carved with screw thread, and being goed deep into by probe in magnetic support hole and to point to worktable bottom surface, magnetic support is connected by screw and is fixed on turntable body;
Acceleration transducer (17) eight by magnetic support uniform adsorption on static pressure turntable rotary table (1), and corresponding with each static pressure oil pad (37) position, be used for the vibration shape of test table.
2. the liquid closed type static pressure turntable experimental provision of a kind of modifiable flow controller according to claim 1, it is characterized in that: in dynamic testing process, first eddy current displacement sensor (5) to be fixed on the correspondence position of each hydrostatic support lubricating pad (37), magnetic support is connected by screw and is fixed on turntable body (2), eddy current displacement sensor (5) probe is carved with screw thread, probe is goed deep in magnetic support hole, two ends attaching nut finger or pliers clamping are with fixing, until sensor probe end face is close to the lower surface of rotary table (1), by applying dynamic load, test different loads power and load position are to the dynamic response of turntable load-carrying properties, by setting turntable rotating speed and time, test oil temperature is on the impact of turntable bearer properties.
3. the liquid closed type static pressure turntable experimental provision of a kind of modifiable flow controller according to claim 1, is characterized in that: utilize this device can do dynamic characteristic test experiment, detailed process is as follows:
1) first on the magnetic support of turntable body side surface, eddy current displacement sensor is installed, is used for the floatation volume of surveying work platform;
2) to static pressure turntable system fuel feeding, after turntable worktable floats, the time dependent curve of oil film floatation volume of each lubricating pad of turntable is obtained;
3) reach steadily when the worktable of turntable floats, to turntable dynamic load, the oil film thickness of each lubricating pad under will receiving this operating mode by dynamic signal acquisition disposal system, oil pocket pressure curve over time, diverse location is set, the dynamic load of different size, under will obtaining different operating mode, each lubricating pad is about time dependent curves such as oil film thickness and oil pocket pressure;
4) by vibrator exciting, change the excited frequency of vibrator, through acceleration transducer by signal feedback to signal acquiring system, obtain the characteristics of mode of static pressure turntable;
5) turntable is made to rotate with certain rate over time, oil temperature will raise, to obtain in turntable lubricating pad the change of oil pocket pressure, oil film thickness change and temperature rise respectively by eddy current displacement sensor, pressure transducer and temperature sensor, and then the change curve of the turntable bearer properties caused due to speed can be obtained.
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| CN112123199A (en) * | 2020-08-27 | 2020-12-25 | 森合(天津)科技有限公司 | Internal feedback precise closed static pressure rotary table |
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| WO2023115746A1 (en) * | 2021-12-20 | 2023-06-29 | 中国机械总院集团海西(福建)分院有限公司 | Flow control method for high-precision and high-rigidity hydrostatic pressure device |
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