CN209387290U - The device of ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test can be achieved - Google Patents

Abstract

The utility model discloses the devices of a kind of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test, including electro spindle and fluid to be measured hydrostatic bearing, the axle journal of fluid to be measured hydrostatic bearing is fixed on the spindle rotor of electro spindle, the shell of electro spindle is equipped with linear guide, sliding is disposed with guide rail slide block in linear guide, guide rail slide block is mounted on the bearing block of fluid to be measured hydrostatic bearing, the bearing shell of fluid to be measured hydrostatic bearing is arranged in the inner hole of bearing block and is fixedly connected with the bearing seat, bearing block is equipped with the oil inlet passage and oil discharge passage being connected to the lubrication channel of fluid to be measured hydrostatic bearing.High-speed, high precision rotation reference and power source of the utility model using the electro spindle of high speed and precision as axle journal, so as to effectively improve the product DmN value of diameter and revolving speed, and the bearing shell and axle journal central spindle of fluid to be measured hydrostatic bearing are easily changed, and repeat assembly precision height, assembling and setting is high-efficient.

Description

The device of ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test can be achieved

Technical field

The utility model relates to the hydrodynamic journal liquid polymers test equipments of ultrahigh speed hydraulic static spindle, and in particular to Yi Zhongke Realize the device of ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test.

Background technique

Hydraulic static spindle is since with distinctive " averaging effect of errors ", rotating accuracy is much higher than rolling bearing type master Axis；Simultaneously because liquid medium is incompressible, bearing capacity and rigidity are much higher than aerostatic bearing；Therefore fluid pressure master Axis is applied widely in requiring the high-speed precise machine tool and ultra-precision machine tool that rotating accuracy is high, bearing capacity is strong.

Ultrahigh speed hydraulic static spindle (mm.rpm of product DmN >=1,000,000 of diameter and revolving speed) in addition to have high-precision and Outside high rigidity feature, also has the characteristics that at high speed with high processing efficiency, be always that domestic and international academia and industrial circle are competitively ground The focus of hair.But Conventional wisdom and existing hydrodynamic journal liquid polymers theory think: liquid film is high when hydrostatic pressure main shaft high speed rotation Speed shearing will lead to calorific value and dramatically increase, and temperature rise significantly increases, and then thermal deformation increase causes liquid film gap to reduce, and moistens simultaneously Sliding dielectric viscosity decline leads to the reduction of main shaft bearing capacity, it is easy to " seizing " accident occur.Therefore the DmN value of hydrostatic pressure main shaft is normal It is limited in 300,000 mm rpm or less.

Ultrahigh speed hydraulic static spindle (product DmN value >=1,000,000 mm.rpm of diameter and revolving speed) are tested in different liquid Hydrodynamic journal liquid polymers characterisitic parameter changing rule under film shearing condition discloses ultrahigh speed liquid film shear property and its right for research The affecting laws of hydrodynamic journal liquid polymers characteristic provide experimental technique support.The liquid film shearing condition to be changed includes: different axis Neck and bush material, different liquid film gaps, different surfaces quality, different lubricant mediums, different liquid supply pressures and journal surface Linear velocity.The characterisitic parameter of hydrodynamic journal liquid polymers to be tested include: bearing capacity, liquid film stiffness, lubricant medium flow and Temperature rise.

The ultrahigh speed hydraulic static spindle for developing the mm of DmN >=1,000,000 rpm, must just break through existing fluid pressure The limitation of bearing theory and Conventional wisdom finds the superfast approach of new realization.According to the newest research in domestic and international this field Progress realizes one of the most promising approach of ultrahigh speed hydraulic static spindle, is using new axle journal/bush material and optimization Surface texture parameters change the liquid film shear properties of hydrodynamic journal liquid polymers, and then realize ultrahigh speed rotation.It should but use Approach develops ultrahigh speed hydraulic static spindle, it is necessary to break through ultrahigh speed hydrodynamic journal liquid polymers liquid film shear property and bearing characteristics On-line testing technique problem.Only have the experimental technique, the fluid pressure under aptitude test ultrahigh speed liquid film shearing condition The changing rule of bearing characteristics, to provide experimental data and technical basis for design ultrahigh speed hydraulic static spindle.Wherein, it The liquid film shearing condition of change includes: different axle journal and bush material, different surfaces quality, different liquid film gaps and structure ginseng Number, different lubricant mediums, different liquid supply pressures and journal surface linear velocity；The characterisitic parameter of hydrodynamic journal liquid polymers to be tested It include: bearing capacity, liquid film stiffness, the flow of lubricant medium and temperature rise etc..

At home and abroad there is no the surveys directly against ultrahigh speed hydrodynamic journal liquid polymers liquid film shear property and bearing characteristics at present Method for testing, but it is directed to the hydrodynamic journal liquid polymers characteristic test of middle and slow speed of revolution, there are experimental test procedures can be selected.These methods Can be divided mainly into the two kinds: 1st kind is tested using the opposed oil pocket experimental provision of plane of principle.It is bright existing for this method Inadequate to be: since bearing shell is in horizontally disposed, transversely movable size range is restricted, and the achievable plane of the device is cut Cutting speed rate very little is unable to satisfy the test needs of ultrahigh speed liquid film shearing.2nd kind is to be adopted using ordinary motor as power source Use the main shaft of roller bearings as benchmark rotary shaft, the bearing shell and bearing block of measured bearing are arranged in rolling using floating support Certain axial position of the main shaft of dynamic bearing support, is loaded by bearing block of the plus load to floating support.Its major defect It is measured bearing seat with rolling bearing spindle drum is to separate arrangement, reference for installation disunity, the concentricity of bearing shell and trunnion is very Difficult accurate adjustment, liquid film gap be not easy accurately to guarantee, because of installation error and gap adjustment is improper easilys lead to measurement knot Fruit inaccuracy, even results in trunnion and bearing shell friction scrapes axis or seizes accident.In addition, the axis of fluid to be measured hydrostatic bearing Watt and central spindle once install and be difficult to replace, if replacement, the workload for readjusting assembly precision is very big, and operating efficiency is very It is low.

Since the test method of existing ultrahigh speed hydraulic static spindle liquid film shear property and bearing characteristics is immature, sternly The theoretical research and new product development progress of ultrahigh speed hydraulic static spindle are constrained again, lead to ultrahigh speed fluid pressure electro spindle Fail in engineering field large-scale use.

Utility model content

The technical problems to be solved in the utility model: in view of the above problems in the prior art, a kind of achievable superelevation is provided The device of fast liquid film shear property and hydrostatic bearing characteristic test, the utility model is using the electro spindle of high speed and precision as axle journal High-speed, high precision rotation reference and power source, so as to effectively improve the product DmN value of diameter and revolving speed, and fluid to be measured The bearing shell and axle journal central spindle of hydrostatic bearing are easily changed, and repeat assembly precision height, and assembling and setting is high-efficient.

In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows:

A kind of device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test, including electro spindle and tested The axle journal of hydrodynamic journal liquid polymers, the fluid to be measured hydrostatic bearing is fixed on the spindle rotor of electro spindle, and the electricity is main The shell of axis is equipped with linear guide, and sliding is disposed with guide rail slide block in the linear guide, the guide rail slide block be mounted on by It surveys on the bearing block of hydrodynamic journal liquid polymers, the bearing shell of the fluid to be measured hydrostatic bearing is arranged in the inner hole of bearing block and and axis It holds seat to be fixedly connected, the bearing block is equipped with the oil inlet passage and first being connected to the lubrication channel of fluid to be measured hydrostatic bearing Oil discharge passage.

Optionally, the end of the spindle rotor is equipped with projecting end, and the projecting end is equipped with frustum, the root of the frustum Equipped with end face, the neck bush is set to projecting end and keeps face contact with the outside wall surface of frustum, end face respectively.

Optionally, the side of the bearing block be equipped with load control component, the load control component include mounting base and Adjusting screw rod with handle is threadedly engaged between the adjusting screw rod and mounting base, and the end of the adjusting screw rod contradicts On the outer wall of bearing block side.

Optionally, the outer wall of the bearing shell is equipped with annular groove, and the annular groove is connected to oil inlet passage, the axle journal, It is equipped with axial sealing oil edge among the contact surface of bearing shell and two sides are equipped with annular oil unloading trough, the inside of the bearing shell is equipped with connection The emptying channel of annular groove, the radial oil inlet passage of axial sealing oil edge and connection annular groove, the second oil discharge passage, the diameter Flow controller is equipped with into oil inlet passage.

Optionally, the electro spindle is rolling bearing type electro spindle, and at least two are equipped between the spindle rotor and shell A angular contact ceramic ball bearing.

Optionally, it is hollow structure that angular contact ceramic ball bearing region is located on the spindle rotor.

Optionally, at least one angular contact by fluid to be measured hydrostatic bearing one end is located on the shell of the electro spindle to make pottery Region on the outside of porcelain ball bearing is equipped with annular cooling channel.

Optionally, the shell of the electro spindle includes front-end bearing pedestal, before at least one angular contact ceramic ball bearing is mounted on In bearing block, the front-end bearing pedestal is located at the outer wall at angular contact ceramic ball bearing and is equipped with equipped with groove, and outside the groove Casing, the sealing of both the groove and casing forms annular cooling channel, and casing is equipped with cooling medium connector.

Optionally, the shell of the electro spindle is equipped with the oil-air lubrication being connected to the interior rollaway nest of angular contact ceramic ball bearing Channel.

Optionally, the shell includes rear bearing block, and floating bushing, the main shaft are inserted in the inner hole of the rear bearing block At least one angular contact ceramic ball bearing, the outer wall of the floating bushing and the inner hole of rear bearing block are equipped between rotor and floating bushing Between inner wall be equipped with sealing element, the floating bushing, rear bearing block end face between be equipped with press preloading spring.

Compared to the prior art, the utility model has an advantage that

1, high-speed, high precision rotation reference and power source of the utility model using the electro spindle of high speed and precision as axle journal, So that the product DmN value of diameter and revolving speed reaches 1,000,000 mm.rpm to 3,000,000 mm.rpm.

2, the axle journal of fluid to be measured hydrostatic bearing is fixed on the spindle rotor of electro spindle by the utility model, is tested Bearing block on the outside of the bearing shell of hydrodynamic journal liquid polymers is fitted on the shell of electro spindle by guide rail slide block, linear guide, The bearing shell and axle journal central spindle of fluid to be measured hydrostatic bearing are easily changed, as long as bearing outside diameter size consistent (hole size and surface Variable mass), bearing block can be easily loaded into and tested, easily carried out between different bush materials, different surfaces, no With the hydrodynamic journal liquid polymers high speed dynamic characteristic test of structural parameters, assembly precision height is repeated, assembling and setting is high-efficient.

3, the axle journal of fluid to be measured hydrostatic bearing is fixed on the spindle rotor of electro spindle by the utility model, is tested Bearing block on the outside of the bearing shell of hydrodynamic journal liquid polymers is fitted on the shell of electro spindle by guide rail slide block, linear guide, Fluid to be measured hydrostatic bearing is connect by bearing block with the linear guide on electro spindle shell, fluid to be measured hydrostatic bearing and bearing Seat can move freely in linear guide, can be adjusted between fluid to be measured hydrostatic bearing inner surface and axle journal by the movement Liquid film gap pushes the additional load very little of bearing shell movement since linear rolling track coefficient of friction is small.

Detailed description of the invention

Fig. 1 is the schematic view of the front view of the utility model embodiment.

Fig. 2 is the radial schematic cross-sectional view of the utility model embodiment.

Fig. 3 is the axial schematic cross-sectional view of the utility model embodiment.

Fig. 4 is the detailed construction schematic diagram in the oil-air lubrication channel of the utility model embodiment.

Marginal data: 1. electro spindles；2. bearing shell；3. axle journal；4. spindle rotor；5. shell；6. transition disc；7. straight line is led Rail；8. guide rail slide block；9. bearing block；10. oil inlet passage；11. the first oil discharge passage；12. projecting end；13. frustum；14. end face； 15. load control component；16 mounting bases；17. handle；18. adjusting screw rod；19. annular groove；20. fluid to be measured hydrostatic bearing； 21. annular oil unloading trough；22. axial sealing oil edge；23. radial oil inlet passage；24. circumferential sealing oil edge；25. flow controller；26. emptying is logical Road；27. the second oil discharge passage；28. angular contact ceramic ball bearing；29. groove；30. casing；31. annular cooling channel；Before 32. Bearing block；33. oil-air lubrication channel；34. rear bearing block；35. floating bushing；36. linear slide bearing；37. pressing preloading spring； 38. drive end bearing bracket；39. threaded hole；40. connector；41. back seat；42. displacement sensor；43. displacement sensor；44. pressure gauge； 45. loadmeter.

Specific embodiment

As depicted in figs. 1 and 2, the present embodiment provides a kind of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristics The device of test, including electro spindle 1 and fluid to be measured hydrostatic bearing 20, fluid to be measured hydrostatic bearing 20 include bearing shell 2, axle journal 3 And bearing block 9, the axle journal 3 of fluid to be measured hydrostatic bearing 20 are fixed on the spindle rotor 4 of electro spindle 1, electro spindle 1 Shell 5 is equipped with linear guide 7, and sliding is disposed with guide rail slide block 8 in linear guide 7, and it is quiet that guide rail slide block 8 is mounted on fluid to be measured Last item is held on 20 bearing block 9, the bearing shell 2 of fluid to be measured hydrostatic bearing 20 be arranged in the inner hole of bearing block 9 and with bearing block 9 It is fixedly connected, bearing block 9 is equipped with the oil inlet passage 10 and first being connected to the lubrication channel of fluid to be measured hydrostatic bearing 20 and goes out Oily channel 11.The bearing block 9 in 2 outside of bearing shell of fluid to be measured hydrostatic bearing 20 passes through guide rail slide block 8, the cooperation peace of linear guide 7 On the shell 5 of electro spindle 1, structure is simpler, and relative positional accuracy is easier to ensure that when assembly, fluid to be measured static pressure axis It holds 20 to connect by bearing block 9 with the linear guide 7 on the shell 5 of electro spindle 1, fluid to be measured hydrostatic bearing 20 and bearing block 9 It can move freely, can be adjusted between 20 inner surface of fluid to be measured hydrostatic bearing and axle journal 3 by the movement in linear guide 7 Liquid film gap, since linear rolling track coefficient of friction is small, the additional load very little that pushes bearing shell mobile.

In the present embodiment, transition disc 6 is installed on the shell 5 of electro spindle 1, linear guide 7 is mounted on transition disc 6.This Outer linear guide 7 also can according to need using other modes mounting arrangements on the shell 5 of electro spindle 1.

In the present embodiment, guide rail slide block 8 is mounted on the bearing block 9 of fluid to be measured hydrostatic bearing 20 by screw.

As shown in Fig. 2, the end of spindle rotor 4 is equipped with projecting end 12, projecting end 12 is equipped with frustum 13, the root of frustum 13 Equipped with end face 14, axle journal 3 is sheathed on projecting end 12 and keeps face contact with the outside wall surface of frustum 13, end face 14 respectively.By upper Structure is stated, so that forming the conical surface double positioning connection connections in the end face HSK between projecting end 12, axle journal 3, coupling stiffness is high, even Precision height is connect, ultrahigh speed is adapted for carrying out and steadily operates, it is strong that radial loaded ability can be born；And axle journal 3 is easily torn open It unloads and installs, easily carry out the fluid pressure axis under the conditions of not coaxial core material, different surfaces quality, different surfaces linear velocity Hold characteristic test.

As shown in Fig. 2, axle journal 3 is equipped with threaded hole 39, and axle journal 3 is by passing through the connector 40 of threaded hole 39 and overhanging End 12 is threadedly coupled, and connector 40 and threaded hole 39 are threadedly coupled, and makes fluid to be measured hydrostatic bearing 20 by above structure Axle journal 3, which is fixed on the spindle rotor 4 of electro spindle 1, to be connected as one and easy to disassemble.

As shown in Figures 2 and 3, the outer wall of bearing shell 2 is equipped with annular groove 19, and annular groove 19 is connected to oil inlet passage 10, axis Neck 3, bearing shell 2 contact surface among be equipped with axial sealing oil edge 22 and two sides are equipped with annular oil unloading trough 21, the inside of bearing shell 2 is set There is the radial oil inlet passage 23 of connection annular groove 19 and is connected to the emptying channel of annular oil unloading trough 21, the second oil discharge passage 27 26, flow controller 25 is equipped in radial oil inlet passage 23.

As shown in Figure 1, the side of bearing block 9 is equipped with load control component 15, load control component 15 includes mounting base 16 Adjusting screw rod 18 with handle 17 is had, is threadedly engaged, and the end of adjusting screw rod 18 between adjusting screw rod 18 and mounting base 16 It contradicts on the outer wall of 9 side of bearing block.Mounting base 16, which can according to need, to be fixed on testing stand or ground or shell 5, When loading to fluid to be measured hydrostatic bearing 20, rotational handle 17, handle 17 drives adjusting screw rod 18 to rotate, adjusting screw rod 18 and peace It fills seat 16 and relative motion occurs, so that the load for acting on bearing block 9 changes, due to fluid to be measured hydrostatic bearing 20 It is mounted on bearing block 9, so the load of fluid to be measured hydrostatic bearing 20 can also change.

In the present embodiment, the bore area of fluid to be measured hydrostatic bearing 20 is provided with the opposed oil of horizontally disposed fluid pressure Chamber.Since the weight of fluid to be measured hydrostatic bearing 20 and bearing block 9 etc. is all undertaken by linear guide 7, horizontal direction load Load can not consider the weight of fluid to be measured hydrostatic bearing 20 and bearing block 9 itself, be Rigidity Calculation and theory analysis band Very big convenience is carried out.The bore area of fluid to be measured hydrostatic bearing 20 is only provided with the opposed oil of horizontally disposed fluid pressure Chamber is not provided with the oil pocket of vertical direction, avoids axle journal high speed rotation bring liquid and calculates into oil pocket bring is closed on The complexity and difficulty of analysis.As needed, fluid to be measured hydrostatic bearing 20 can be using various knots such as single-chamber, three chambers, four chambers Structure.

At the test condition, the lubricating oil flow path of fluid to be measured hydrostatic bearing 20 is as follows: profit required for bearing 20 Lubricating oil enters oil inlet passage 10 from the fuel feed hole on bearing block 9, using annular groove 19, the diameter between bearing block 9 and bearing 20 Oil pocket is entered to oil inlet passage 23, flow controller 25, then passes through the axial sealing oil edge 22 of two sides and the circumferential oil sealing of direction of rotation Side 24 enters annular oil unloading trough 21, and the left and right sides of bearing shell 2 is respectively arranged with annular oil unloading trough 21, the oil in hydrostatic bearing oil pocket Liquid passes through axial sealing oil edge 22 and initially enters annular oil unloading trough 21, converges in the second oil discharge passage 27,11 of lower section and flows out axis Hold seat 9.

As shown in Fig. 2, electro spindle 1 is rolling bearing type electro spindle, at least two are equipped between spindle rotor 4 and shell 5 Angular contact ceramic ball bearing 28 is opposite using can ensure electricity for other kinds of bearing using angular contact ceramic ball bearing 28 The high revolving speed of main shaft 1 is run.

Being located at 28 region of angular contact ceramic ball bearing in the present embodiment, on spindle rotor 4 is hollow structure, is conducive to main shaft The heat dissipation of rotor 4 and heat-absorbing deformation, that reduces that thermal deformation diagonally contacts that ceramic ball bearing 28 and spindle rotor 4 cooperate additional answers Power.

As shown in Fig. 2, being located at least one corner connection by 20 one end of fluid to be measured hydrostatic bearing on the shell 5 of electro spindle 1 The region for touching 28 outside of ceramic ball bearing is equipped with annular cooling channel 31.Ceramics can be diagonally contacted by annular cooling channel 31 Ball bearing 28 is effectively cooled down, effectively inhibition bearing temperature rise, so that reducing electro spindle 1 passes to fluid to be measured hydrostatic bearing 20 heat.

As shown in Fig. 2, the shell 5 of electro spindle 1 includes front-end bearing pedestal 32, the installation of at least one angular contact ceramic ball bearing 28 In front-end bearing pedestal 32, front-end bearing pedestal 32 is located at the outer wall at angular contact ceramic ball bearing 28 and is equipped with groove 29, and the groove 29 outsides are equipped with casing 30, and the sealing of both groove 29 and casing 30 forms annular cooling channel 31, and casing 30 is equipped with cooling Medium connector.

As shown in Fig. 2, the shell 5 of electro spindle 1 is equipped with the oil gas being connected to the interior rollaway nest of angular contact ceramic ball bearing 28 Lubrication channel 33, by oil-air lubrication channel 33, diagonally contact ceramic ball bearing 28 uses Oil Gas Lubrication Technology, can ensure electricity The high revolving speed of main shaft 1 is run.

As shown in Fig. 2, shell 5 includes rear bearing block 34, floating bushing 35 is inserted in the inner hole of rear bearing block 34, main shaft turns It is equipped at least one angular contact ceramic ball bearing 28 between son 4 and floating bushing 35, the outer wall of floating bushing 35 and rear bearing block 34 Between inner hole inner wall be equipped with linear slide bearing 36, floating bushing 35, rear bearing block 34 end face between be equipped with press preloading spring 37.By press preloading spring 37, diagonally contact ceramic ball bearing 28 realizes level pressure firmly beforehand means, can ensure electro spindle 1 High revolving speed operation.As shown in Fig. 2, shell 5 is sequentially connected and is formed by front cover 38, front-end bearing pedestal 32, rear bearing block 34, back seat 41. In the present embodiment, floating bushing 35 is made of tube body and the pedestal in back seat 41, and press preloading spring 37 is mounted on rear bearing The end face of seat 34, between pedestal.

As shown in figure 4, for two angular contact ceramic ball bearings 28 at front-end bearing pedestal 32, needed for oil-air lubrication High pressure gas enters from the air inlet (as shown in 33-a in figure) of 34 right end of rear bearing block, then passes through the pipe in front-end bearing pedestal 32 Road (as shown in 33-b in figure) arrives separately at two injection loop ducts (as shown in 33-c in figure), drives be attached on pipeline respectively Lubricating oil sprays to the interior rollaway nest of two angular contact ceramic ball bearings 28, completes the lubrication to two angular contact ceramic ball bearings 28； Then, gas is again through the pipeline (as shown in 33-d in figure) in the front-end bearing pedestal 32, (33-e in such as figure of the pipeline in rear bearing block 34 It is shown), the venthole (as shown in 33-f in figure) of 34 right end of rear bearing block flow out electro spindle 1.

As shown in figure 4, for two angular contact ceramic ball bearings 28 at rear bearing block 34, needed for oil-air lubrication High pressure gas enters from the admission line (as shown in 33-g in figure) from back seat 41, then (such as by the pipeline in floating bushing 35 In figure shown in 33-h) two injection loop ducts (as shown in 33-i in figure) is arrived separately at, the lubrication being attached on pipeline is driven respectively Oil sprays to the interior rollaway nest of two angular contact ceramic ball bearings 28, completes the lubrication to two angular contact ceramic ball bearings 28；Then, Gas is again after the pipeline (as shown in 33-j in figure) in floating bushing 35, from the outlet pipe from back seat 41 (such as 33-k institute in figure Show) outflow electro spindle 1.

Through overtesting, the present embodiment can realize that the device of ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test can Guarantee the turn up 30000rpm or more of electro spindle 1, DmN value can be rotated accordingly with supports main shaft rotor 4 and reach 1,000,000 Mm.rpm to 3,000,000 mm.rpm.

The present embodiment can realize that ultrahigh speed liquid film shear property and the device of hydrostatic bearing characteristic test have the advantages that subordinate:

1, the present embodiment uses the electro spindle 1(high speed and precision permanent magnet synchronization motor spindle of oil-air lubrication) height as axle journal 3 Fast high-precision rotary benchmark and power source directly drive the central spindle high speed rotation of tested hydrostatic bearing 20, so that axis The diameter of the axle journal 3 of core and the product DmN value of revolving speed reach 1,000,000 mm.rpm to 3,000,000 mm.rpm.

2, the bearing shell 2 and bearing block 9 for directly driving tested hydrostatic bearing 20 use 7 floating support of linear guide, Ke Yi It is moved in the horizontal direction in the linear guide 7 being linked on the shell of electro spindle 1.

3, central spindle is tested to connect with being coupled for the projecting end 12 of electro spindle 1 using the double positioning connections of the end face the HSK conical surface. When the central spindle conical surface has just been inserted in projecting end 12, there are certain intervals for end face and main shaft end face, and after lock-screw is tightened, end clearance disappears It removes.The bind mode is conducive to be conducive to axis not because centrifugal distortion causes connecting stiffness to reduce when conical surface connection runs at high speed Core bears radial loaded.

4,2 both ends of bearing shell for being tested hydrostatic bearing 20 use clearance seal pattern, are provided with two-stage oil return slot on sealing edge, After pressure oil in oil pocket flows to the 1st grade of oil return along axial direction, lower section is converged to along annular groove under the effect of gravity；If the 1st grade The oil mass oil return of oil-recovery tank is too late, and small part can enter the 2nd grade of oil-recovery tank, converges to down under the effect of gravity along annular groove Side；Due to main shaft high speed rotation, the oil into oil-recovery tank can radially be thrown away under the effect of gravity, and lubricating oil can be inhibited along axial Leakage, the sealing structure can play sealing function to lubricating oil under conditions of there are radial clearance, be very suitable for liquid The sealing of static pressure high-speed main shaft needs.

5, bearing shell 2, the axle journal 3 for being tested hydrostatic bearing 20 are conveniently replaced, to adapt to test different axle journal bearing shell materials Liquid film shear property and hydrostatic bearing under material, surface texture, oil pocket number, liquid film gap, liquid supply pressure and speed conditions is special Property.

6, when main shaft runs at high speed, bearing block 9 is loaded in the horizontal direction using handle 17, axle journal 3 and bearing block 9 Between displacement can pass through horizontal direction arrange displacement sensor detection.

The present embodiment can realize that the device of ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test can realize following surveys Examination:

1) liquid film stiffness is tested: since 3 outer circle of axle journal is displaced relative to the horizontal radial of electro spindle 1 by fixed testing stand Displacement sensor 42 test, bearing block 9 outer circle load effect under relative to linear guide 7 occur horizontal direction displacement, It is tested by the displacement sensor 43 being fixed on testing stand.When testing, by plus load divided by the position of bearing block 9 It moves, liquid film stiffness can be obtained in the difference of displacement the two of axle journal 3.

2) oil pocket pressure test: to the pressure of oil pocket before and after bearing shell 2 horizontal direction by draw the pressure gauge 44 of oil pipe into Row test.

3) load test: both axle journal 3, bearing shell 2 pass through the load that is coupled with spring by manual knob loaded load size Lotus table 45 is shown.

The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.

Claims (10)

1. a kind of device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test, it is characterised in that: including electricity The axle journal (3) of main shaft (1) and fluid to be measured hydrostatic bearing (20), the fluid to be measured hydrostatic bearing (20) is fixed on electric master On the spindle rotor (4) of axis (1), the shell (5) of the electro spindle (1) is equipped with linear guide (7), the linear guide (7) Upper sliding is disposed with guide rail slide block (8), and the guide rail slide block (8) is mounted on the bearing block (9) of fluid to be measured hydrostatic bearing (20) On, the bearing shell (2) of the fluid to be measured hydrostatic bearing (20) is arranged in the inner hole of bearing block (9) and fixes with bearing block (9) Connection, the bearing block (9) be equipped with the oil inlet passage (10) that is connected to the lubrication channel of fluid to be measured hydrostatic bearing (20) and First oil discharge passage (11).

2. the device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test according to claim 1, Be characterized in that: the end of the spindle rotor (4) is equipped with projecting end (12), and the projecting end (12) is equipped with frustum (13), described The root of frustum (13) is equipped with end face (14), and the axle journal (3) is sheathed on projecting end (12) and the respectively outer wall with frustum (13) Face, end face (14) keep face contact.

3. the device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test according to claim 2, Be characterized in that: the side of the bearing block (9) is equipped with load control component (15), and the load control component (15) includes installation Seat (16) and the adjusting screw rod (18) for having handle (17), are threadedly engaged between the adjusting screw rod (18) and mounting base (16), And the end of the adjusting screw rod (18) contradicts on the outer wall of bearing block (9) side.

4. the device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test according to claim 1, Be characterized in that: the outer wall of the bearing shell (2) is equipped with annular groove (19), and the annular groove (19) is connected to oil inlet passage (10), The axle journal (3), bearing shell (2) contact surface among be equipped with axial sealing oil edge (22), circumferential sealing oil edge (24) and two sides and be equipped with Annular oil unloading trough (21), the inside of the bearing shell (2) are equipped with radial oil inlet passage (23) and the connection of connection annular groove (19) Annular oil unloading trough (21), the second oil discharge passage (27) emptying channel (26), be equipped with throttling in radial direction oil inlet passage (23) Device (25).

5. achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic described according to claim 1~any one of 4 The device of test, it is characterised in that: the electro spindle (1) is rolling bearing type electro spindle, the spindle rotor (4) and shell (5) at least two angular contact ceramic ball bearings (28) are equipped between.

6. the device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test according to claim 5, Be characterized in that: being located at angular contact ceramic ball bearing (28) region on the spindle rotor (4) is hollow structure.

7. the device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test according to claim 5, It is characterized in that: being located at least one corner connection by fluid to be measured hydrostatic bearing (20) one end on the shell (5) of the electro spindle (1) It touches the region on the outside of ceramic ball bearing (28) and is equipped with annular cooling channel (31).

8. the device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test according to claim 5, Be characterized in that: the shell (5) of the electro spindle (1) includes front-end bearing pedestal (32), at least one angular contact ceramic ball bearing (28) It is mounted in front-end bearing pedestal (32), the front-end bearing pedestal (32) is located at the outer wall at angular contact ceramic ball bearing (28) equipped with recessed Slot (29), and casing (30) are equipped with outside the groove, it is cooling logical that the sealing of both the groove (29) and casing (30) forms annular Road (31), and casing (30) is equipped with cooling medium connector.

9. the device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test according to claim 5, Be characterized in that: the shell (5) of the electro spindle (1) is equipped with the oil gas being connected to the interior rollaway nest of angular contact ceramic ball bearing (28) Lubrication channel (33).

10. the device of achievable ultrahigh speed liquid film shear property and hydrostatic bearing characteristic test according to claim 9, Be characterized in that: the shell (5) includes rear bearing block (34), is inserted with floating bushing in the inner hole of the rear bearing block (34) (35), at least one angular contact ceramic ball bearing (28), the floating are equipped between the spindle rotor (4) and floating bushing (35) It covers and is equipped with linear slide bearing (36) between the outer wall of (35) and the inner hole inner wall of rear bearing block (34), the floating bushing (35), Press preloading spring (37) is equipped between the end face of rear bearing block (34).