CN108105259A - A kind of dynamic and static pressure cone bearing shafting and precision machine tool - Google Patents
A kind of dynamic and static pressure cone bearing shafting and precision machine tool Download PDFInfo
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- CN108105259A CN108105259A CN201711404336.4A CN201711404336A CN108105259A CN 108105259 A CN108105259 A CN 108105259A CN 201711404336 A CN201711404336 A CN 201711404336A CN 108105259 A CN108105259 A CN 108105259A
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- Prior art keywords
- dynamic
- static pressure
- cavity
- conical surface
- pressure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
- F16C32/0633—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion the liquid being retained in a gap
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
- B23Q1/38—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using fluid bearings or fluid cushion supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Involved dynamic and static pressure cone bearing shafting and precision machine tool according to the present invention, including at least one dynamic and static pressure cone bearing and rotation axis, dynamic and static pressure cone bearing has support base, accommodate component and rotating member, accommodating component includes receiving member, multiple static pressure bushings and multiple dynamic pressure bushings, receiving member has multiple static pressure passages and dynamic pressure passage, static pressure bushing is arranged on the opening of the first cavity, the cross section of the dynamic pressure cavity of dynamic pressure bushing is gradually widened from bottom to opening, multiple static pressure bushings and multiple dynamic pressure bushings are arranged on along at least one plane of arrangement on the indent conical surface, plane of arrangement is the plane of the rotation axis perpendicular to rotating member.During working condition, convex cone in the dynamic and static pressure cone bearing of the present invention is not in contact with each other when rotating with concave cone face, compared with dynamic and static pressure cylinder bearing, dynamic and static pressure cone bearing has better concentric fit degree, therefore the dynamic rotary precision of cone bearing shafting upper rotary shaft can be improved using gas or hydrodynamic and hydrostatic pressure technology.
Description
Technical field
The invention belongs to machinery fields, and in particular to a kind of dynamic and static pressure cone bearing shafting and lathe.
Background technology
It is contact condition when the revolute pair of the prior art rotates mostly, rotation precision and efficiency is not high.
The bearing combined using gas or the dynamic and static pressure technology of liquid with cone structure is current raising main shaft running accuracy
One of effective approach.
According to gas (air) or the dynamic and static pressure technology basic principle of liquid (fluid), liquid or gas medium, respectively enter
Into multiple chambers of the cone axis concave conical surface, when convex cone rotates, medium forms dynamic pressure, convex cone rotating speed from multiple chambers
It is higher, Media density is bigger, it is concave-convex cone gap it is smaller, dynamic pressure is bigger, convex due to there is certain gap between the concave, convex conical surface
Cone floats, and in contactless state during rotation, but the requirement on machining accuracy of the concave cone face of the cone bearing and chamber is high, is processed into
This is big.
The content of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of smart to concave cone face and chamber process
Spend of less demanding, dynamic and static pressure cone bearing shafting and lathe with dynamic pressure and static pressure technology while processing cost can be reduced.
The present invention provides a kind of dynamic and static pressure cone bearing shaftings, have the feature that, including dynamic and static pressure cone bearing；
And rotation axis, be arranged in dynamic and static pressure cone bearing, wherein, dynamic and static pressure cone bearing have support base, accommodate component and
Rotating member, accommodating component includes receiving member, multiple static pressure bushings and multiple dynamic pressure bushings with the indent conical surface and outer surface,
Receiving member has multiple for by the static pressure passage of fluid and dynamic pressure passage, static pressure passage and dynamic pressure passage to be separately positioned on appearance
It receives in the inner wall of part and the perforation indent conical surface and outer surface, static pressure passage includes being arranged on first to concave on the indent conical surface recessed
Chamber and the static pressure duct for connecting the first cavity and outer surface, dynamic pressure passage are recessed including being arranged on concave on the indent conical surface second
Chamber and the dynamic pressure duct for connecting the second cavity and outer surface, static pressure bushing have cylindrical static pressure cavity, and static pressure bushing is set
The first cavity opening and static pressure cavity opening towards the indent conical surface, the bottom of static pressure cavity is connected with the first cavity,
Dynamic pressure bushing has a dynamic pressure cavity, and dynamic pressure bushing is arranged on the opening of the opening of the second cavity and dynamic pressure cavity towards indent
The conical surface, the bottom of dynamic pressure cavity are connected with the second cavity, the cross section of dynamic pressure cavity from bottom to opening be it is gradually widened,
Rotating member has the convex conical surface to match with the indent conical surface, is arranged in the indent conical surface, multiple static pressure bushings and multiple dynamic pressures lining
Set is arranged on along at least one plane of arrangement on the indent conical surface, and plane of arrangement is the plane of the rotation axis perpendicular to rotating member,
Support base has the support base inner cavity to match with the outer surface of receiving member, and receiving member is arranged on intracavitary and and support base in support base
Inner cavity is interference fitted, and at least one first passage being connected with static pressure duct and and dynamic pressure are respectively arranged on support base
At least one second channel that duct is connected.
In dynamic and static pressure cone bearing shafting provided by the invention, it can also have the feature that：Wherein, static pressure bushing
Quantity be at least 3, the quantity of dynamic pressure bushing is at least 3, and the taper of the indent conical surface is 60-150 degree, the cone of convex conical surface
It spends for 60-150 degree.
In addition, in dynamic and static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, it is quiet
Indentation chamber is in the form of a column, the shape of accent be circular, ellipse, square, rectangle and it is trapezoidal in any one, dynamic pressure is recessed
Chamber is wedge shaped in the both ends of crescent or section along the section of plane of arrangement, the shape of dynamic pressure cavity accent is circular, ellipse,
Square, rectangle and it is trapezoidal in any one.
In addition, in dynamic and static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, it is quiet
The depth of the indent of chamber is pressed as 0.5-5mm, static pressure cavity total surface area accounts for the 20-60% of indent conical surface total surface area, moves
The depth of the indent of chamber is pressed as 4-8mm, dynamic pressure cavity total surface area accounts for the 20-60% of indent conical surface total surface area, gap
Than being h2/h1 for the expression formula of 2-2.5, gap-ratio, h2 is the bottom of dynamic pressure cavity and the distance of convex conical surface, and h1 is dynamic pressure
The top end face of bushing and the distance of convex conical surface.
In addition, in dynamic and static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, it is more
A first cavity and multiple second cavitys are uniformly disposed alternately at along plane of arrangement on the indent conical surface, are also uniformly set on the indent conical surface
A plurality of isolation channel is equipped with, isolation channel between adjacent two the first cavitys and the second cavity, hand over by the elongated end of isolation channel
It is compiled on the rotation axis of revolving member, the groove width of isolation channel is 2-4mm, depth 2-5mm, the indent conical surface and convex conical surface
Surface be both provided with corrosion-inhibiting coating.
In addition, in dynamic and static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, it is quiet
Pressing the top end face of bushing, for the top end face of dynamic pressure bushing higher than the indent conical surface, the first cavity and the second cavity are equal higher than the indent conical surface
It is cylindrical.
In addition, in dynamic and static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, it is quiet
The top end face of pressure bushing is the arcwall face that coincide with the indent conical surface and coincide with the indent conical surface, the top end face of dynamic pressure bushing be with it is interior
It arcwall face that concave cone face coincide and coincide with the indent conical surface.
In addition, in dynamic and static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, it is quiet
For pressure bushing with receiving member to be fixedly connected or being detachably connected, dynamic pressure bushing is to be fixedly connected or be detachably connected with receiving member.
In addition, in dynamic and static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, turn
In the convex conical surface of moving part along plane of arrangement be provided with annular groove with static pressure cavity and the corresponding indent of dynamic pressure cavity bushing or
The annulus of evagination.
In addition, in dynamic and static pressure cone bearing shafting provided by the invention, can also have the feature that：Wherein, turn
The through hole to match is provided in moving part and receiving member, rotation axis is arranged in through hole and penetrates through rotating member and receiving member,
Alternatively, rotation axis is arranged in rotating member.
The present invention provides also a kind of precision machine tool, special using the dynamic and static pressure cone bearing shafting of above-mentioned any one
Sign is：
Wherein, rotation axis is the workpiece rotary shaft or tool rotating shaft in precision machine tool.
In precision machine tool provided by the invention, it can also have the feature that：
Wherein, precision machine tool is any one in lathe, grinding machine, boring machine, milling machine.
The effect of invention
Involved dynamic and static pressure cone bearing shafting according to the present invention, during working condition, convex cone is mutual with concave cone face when rotating
It does not contact, is in gas or state of liquid friction always, in this way, the system of pivot jerk value when convex cone rotates and concave-convex cone
It makes error to be not directly dependent upon, i.e., convex cone jerk value is not equal to concave-convex cone deviation from circular from amount, according to actual measurement, jump when convex cone rotates
Momentum is the 1/5-1/10 of concave-convex cone deviation from circular from amount, and compared with dynamic and static pressure cylinder bearing, dynamic and static pressure cone bearing has more preferable
Concentric fit degree, therefore the dynamic rotary of cone bearing shafting upper rotary shaft can be improved using gas or hydrodynamic and hydrostatic pressure technology
Precision reaches 0.1-1.0 μm.
Dynamic pressure technology, which is not required to input, the medium of pressure, but it is essential to ensure that concave cone chamber has enough oil masses, certain viscous
Smaller gap possesses this to form inclined wedge (wedge point towards the direction of rotation of convex cone) between the medium of degree, concave cone and convex cone
A little conditions, when convex cone rotates, medium gets into small end from inclined wedge big end and forms dynamic pressure, it follows that convex cone does not turn not produce
Raw pressure, rotating speed is higher, Media density is higher, concave-convex cone gap is smaller, and dynamic pressure is bigger.
The fuel tank that outside is set divides two-way fuel feeding, controls oil liquid pressure and the laggard pressure oil in meditation of flow by flow controller respectively
Chamber and dynamic pressure grease chamber, the two functions are selected as needed, as required to bear at a high speed and carrying big precision equipment, should be adopted simultaneously
With fluid pressure and dynamic pressure cone bearing, the equipment big to low speed and carrying is using hydrostatic bearing, and high speed light loading equipment is using dynamic
Last item is held.A tractor serves several purposes can be realized, so as to save production cost.
Further, since dynamic pressure bushing and static pressure bushing are arranged on after being on the indent conical surface, dynamic pressure cavity and static pressure cavity
Processing can individually process, therefore difficulty of processing substantially reduces, so as to improve the work of dynamic pressure cavity and the processing of static pressure cavity
Make efficiency, reduce processing cost.
Description of the drawings
Fig. 1 is dynamic and static pressure cone bearing shafting schematic diagram in the embodiment of the present invention；
Fig. 2 is dynamic and static pressure cone revolute pair schematic diagram in the embodiment of the present invention；
Fig. 3 is the schematic cross-sectional view of receiving member in the embodiment of the present invention；
Fig. 4 be in Fig. 3 B to schematic diagram；
Fig. 5 be in Fig. 2 part A in the section view enlarged diagram of plane of arrangement；And
Fig. 6 is the enlarged diagram of Local C in Fig. 2.
Fig. 7 is the sectional view schematic diagram of support base.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to be specifically addressed the dynamic and static pressure cone bearing shafting and lathe of the present invention.
Embodiment one
As shown in Figure 1, dynamic and static pressure cone bearing shafting 100 includes 2 dynamic and static pressure cone bearings and a rotation axis 40.
Dynamic and static pressure cone axis, which contracts to include, accommodates component 10, rotating member 20, support base 30.
As shown in Fig. 2, accommodating component 10 includes receiving member 11, multiple static pressure bushings 12 and multiple dynamic pressure bushings
13。
As shown in figure 4, receiving member 11 includes the indent conical surface 111, outer surface 112, multiple static pressure passages 113, multiple dynamic pressures
Passage 114 and through hole 116.
And some be not required axis by occasion, receiving member 11 can be not provided with through hole 116.In the present embodiment, accommodate
Part 11 interior 111 center of concave cone face it is horizontally arranged be useful for rotation axis 40 by through hole 116, receiving member 11 using gold
Category is made.
Static pressure passage 113 is arranged in the inner wall of receiving member 11 and penetrates through the indent conical surface 111 and outer surface 112, and static pressure leads to
Road 113 includes being arranged on the first cavity 113a to concave on the indent conical surface 111 and connects the first cavity 113a and outer surface 112
Static pressure duct 113b, static pressure passage 113 is used for through fluid, the static pressure duct 113b that external high-pressure fluid passes through outer surface
Into concave cone face 111.In the present embodiment, which is liquid oil.
Dynamic pressure passage 114 is arranged in the inner wall of receiving member 11 and penetrates through the indent conical surface 111 and outer surface 112, and dynamic pressure is led to
Road 114 includes being arranged on the second cavity 114a to concave on the indent conical surface 111 and connects the second cavity 114a and outer surface 112
Dynamic pressure duct 114b, dynamic pressure passage 114 is used for through fluid, and the dynamic pressure duct 114b that external fluid passes through outer surface enters
Concave cone face 111.In the present embodiment, which is liquid oil.
As shown in fig. 6, static pressure bushing 12 has cylindrical static pressure cavity 121, static pressure bushing 12 is arranged on the first cavity
The opening of 113a and the opening of static pressure cavity 121 are towards the indent conical surface 111, the bottom of static pressure cavity 121 and the first cavity
113a is connected, and in embodiment, the first cavity 113a is cylinder, and static pressure bushing 12 is made of metal.
As shown in figure 5, dynamic pressure bushing 13 has dynamic pressure cavity 131, dynamic pressure bushing 13 is arranged on opening for the second cavity 114a
At mouthful and the opening of dynamic pressure cavity 131 is towards the indent conical surface 111, and the bottom of dynamic pressure cavity 131 is connected with the second cavity 114a,
The cross section of dynamic pressure cavity 131 is gradually widened from bottom to opening, and in embodiment, the second cavity 114a is cylinder, is moved
Pressure bushing 13 is made of metal.
As shown in Figure 2 and Figure 3, multiple static pressure bushings 12 and multiple dynamic pressure bushings 13 are arranged on along at least one plane of arrangement
On the indent conical surface 111, plane of arrangement is the plane perpendicular to 20 rotation axis of rotating member, in embodiment, 20 rotation axis of rotating member
Line is horizontal line, and plane of arrangement is two, and a plane of arrangement sets 8 static pressure bushings 12, another plane of arrangement sets 8
Dynamic pressure bushing 13.The cooperation taper between component 10 and rotating member 20 is accommodated, according to the big of outer radial load and axial load
It is small to determine.The taper of the indent conical surface is 60-150 degree, and the taper of convex conical surface is 60-150 degree.
As shown in Fig. 2, rotating member 20 has convex conical surface 21, convex conical surface 21 and 111 phase of the indent conical surface of rotating member 20
Match somebody with somebody, there is certain gap between the concave, convex conical surface, the axis of rotating member 20 and the axis collinear of the indent conical surface 111, rotating member 20 around
Horizontal line rotation in interior concave cone face 111, as static pressure duct 113b, dynamic pressure duct 114b of the external liquid oil by outer surface
During into concave cone face 111, rotating member 20 floats, and contactless state is in concave cone when convex cone rotates.The indent conical surface in this example
111 taper and the taper of convex conical surface 21 are 90 degree.
In embodiment, rotating member 20 be provided in the horizontal direction with through hole 116 match for rotation axis 40 by
Through hole.
Support base 30 has the support base inner cavity to match with the outer surface 112 of receiving member 11, and receiving member 11 is arranged on support
Seat in intracavitary and with support base inner cavity be interference fitted.
At least one first passage 31 being connected with static pressure duct 113b is provided on support base 30.
At least one second channel 32 being connected with dynamic pressure duct 115b is provided on support base 30.
As shown in fig. 7, first passage 31 includes at least one first duct, 311 and first annular groove 312,312 edge of annular groove
At least one plane of arrangement indent is arranged on support base surface of internal cavity and matches with static pressure duct 113b, the first duct 311
One end connected with the first annular groove 312, the other end is in communication with the outside.In embodiment, the quantity in the first duct 311 is 1, first
The quantity of annular groove 312 is 1.
Second channel 32 includes at least one second duct, 321 and second annular groove 322, and the second annular groove 322 is along at least one
A plane of arrangement indent is arranged on support base surface of internal cavity and matches with dynamic pressure duct 115b, the one end in the second duct 321
It is connected with the second annular groove 322, the other end is in communication with the outside.In embodiment, the quantity in the second duct 321 is 1, the second annular groove
322 quantity is 1, and support base 30 is made of metal.
Rotation axis 40 is arranged in through hole 116 and penetrates through rotating member 20 and receiving member 10, and in embodiment, rotation axis 40 uses
Metal is made, and rotation axis 40 is connected with 20 interference of rotating member,
The indent conical surface arrangement of two dynamic and static pressure cone bearings is the internal concave surface of inner concave, can also be carried out in turn
Back-to-back arrangement, the arrangement in embodiment are the internal concave surface of inner concave.
Embodiment two
The present embodiment other structures are identical with embodiment two, the difference is that the shape of 121 accent of static pressure cavity is circular, ellipse
Circular, square, rectangle and it is trapezoidal in any one, the shape of 131 accent of dynamic pressure cavity is circular, ellipse, square
Shape, rectangle and it is trapezoidal in any one, dynamic pressure cavity 131 is along the section of plane of arrangement in crescent or along plane of arrangement
The both ends of section are wedge shaped.
The shape of 121 accent of static pressure cavity is ellipse in embodiment two, the shape of 131 accent of dynamic pressure cavity be it is trapezoidal,
The section of dynamic pressure cavity 131 along plane of arrangement is in crescent.
Embodiment three
The present embodiment other structures are identical with embodiment two, the difference is that the top end face of static pressure bushing 12 and dynamic pressure bushing 13
It is above the indent conical surface 111, in embodiment three, the top end face of static pressure bushing 12 and dynamic pressure bushing 13 and the distance of the indent conical surface 11
It is 0.5mm.
The axial section of static pressure bushing 12 can be stairstepping, the axial section or stairstepping of dynamic pressure bushing 13
Shape.
Example IV
As shown in fig. 6, the present embodiment other structures are identical with embodiment three, the difference is that the top end face of static pressure bushing 12 is
It the arcwall face that coincide with the indent conical surface 111 and coincide with the indent conical surface 111, the top end face of dynamic pressure bushing 13 is and the indent conical surface
It 111 identical arcwall faces and coincide with the indent conical surface 111.
Embodiment five
The present embodiment other structures are identical with example IV, the difference is that the depth to concave of static pressure cavity 121 is
0.5-5mm, 121 total surface area of static pressure cavity account for the 20-60% of indent conical surface total surface area, and dynamic pressure cavity 131 concaves
Depth for 4-8mm, 131 total surface area of dynamic pressure cavity accounts for the 20-60% of indent conical surface total surface area, gap-ratio 2-
2.5, the expression formula of gap-ratio is h2/h1, and h2 is the bottom of dynamic pressure cavity and the distance of convex conical surface, and h1 is the top of dynamic pressure bushing
End face and the distance of convex conical surface.When gap-ratio is 2.2, bearing capacity is maximum.It is according to load, rotating speed, the viscosity of oil, axis
It is determined with factors such as the material of bearing and machining accuracies.
The depth to concave of static pressure cavity 121 and dynamic pressure cavity 131 is 4mm in embodiment five, and static pressure cavity 121 is total
Surface area accounts for the 22% of 11 total surface area of the indent conical surface, and 131 total surface area of dynamic pressure cavity accounts for 11 total surface area of the indent conical surface
22%, gap-ratio 2.2.
Embodiment six
The other structures of the present embodiment are identical with embodiment five, the difference is that 12 and first cavity 113a of static pressure bushing is solid
Fixed connection, dynamic pressure bushing 13 are to be fixedly connected with the second cavity 114a, the connection mode of 12 and first cavity 113a of static pressure bushing
Using bonding or interference fit, dynamic pressure bushing 13 is with the second cavity 114a connection modes using Nian Jie or interference fit, embodiment
Static pressure bushing 12 uses Nian Jie, 13 and second cavity 114a connection sides of dynamic pressure bushing with the connection mode of the first cavity 113a in six
Formula is using bonding.
Embodiment seven
The other structures of the present embodiment are identical with embodiment five, the difference is that 12 and first cavity 113a of static pressure bushing is can
Dismantling connection, dynamic pressure bushing 13 and the second cavity 114a are to be detachably connected.
Static pressure bushing 12 is connected with the connection mode of the first cavity 113a using screw in embodiment seven, dynamic pressure bushing 13 with
The connection mode of 114a is connected using screw.
Embodiment eight
The other structures of the present embodiment are identical with embodiment seven, the difference is that being provided with corrosion-inhibiting coating in convex conical surface 21.
Corrosion-inhibiting coating in embodiment eight is anti-decaying paint.
Embodiment nine
The other structures of the present embodiment are identical with embodiment seven, the difference is that being provided with corrosion-inhibiting coating on the indent conical surface 11.
Corrosion-inhibiting coating in embodiment nine is nano ceramics.
Embodiment ten
As shown in figure 3, the other structures of the present embodiment are identical with embodiment six, the difference is that static pressure bushing 12 and dynamic pressure lining
Set 13 is uniformly disposed alternately at along plane of arrangement on the indent conical surface 111, and a plurality of isolation channel is also evenly arranged on the indent conical surface 11
115, for isolation channel 115 between adjacent two the first cavity 113a and the second cavity 114a, the elongated end of isolation channel 115 is equal
It is intersected on the rotation axis of revolving member, the groove width of isolation channel 115 is 2-4mm, depth 2-5mm.
The groove width of isolation channel 115 is 2.5mm in embodiment ten, and depth 2mm, quantity is 8.
Embodiment 11
The other structures of the present embodiment are identical with embodiment five, the difference is that along cloth in the convex conical surface 21 of revolving member 20
Horizontalization face be provided with the annular groove 211 to concave corresponding with static pressure cavity 121 and with dynamic pressure cavity 131 it is corresponding to
The annular groove 212 of indent.
Embodiment 12
The other structures of the present embodiment are identical with embodiment five, the difference is that along cloth in the convex conical surface 21 of revolving member 20
Horizontalization face is provided with the annulus with 131 corresponding convex of static pressure cavity 121 and dynamic pressure cavity.
Embodiment 13
The other structures of the present embodiment are identical with embodiment ten, unlike first passage 31 include it is a plurality of be respectively communicated with it is dynamic
Press duct 113b and the first extraneous duct 311, but without the first annular groove 312, second channel 32 include it is a plurality of be respectively communicated with it is dynamic
Duct 114b and the second extraneous duct 321 are pressed, but without the second annular groove 322.In embodiment, the first duct 311 and the second hole
The quantity in road 32 is 8.
Embodiment 14
A kind of precision machine tool, using the dynamic and static pressure cone bearing shafting of any one above-mentioned as the work in precision machine tool
Part rotation axis or tool rotating shaft.
In the present embodiment, dynamic and static pressure cone bearing shafting uses the dynamic and static pressure cone bearing shafting in embodiment five, rotates
Axis is the workpiece rotary shaft in precision machine tool.
Embodiment 15
The other structures of the present embodiment are identical with embodiment 14,
Its precision machine tool is any one in lathe, grinding machine, boring machine, milling machine.
Precision machine tool is lathe in the present embodiment.
The effect of embodiment
Dynamic and static pressure cone bearing shafting according to involved by the present embodiment, during working condition, convex cone is mutual with concave cone when rotating
It does not contact, is in state of liquid friction always, in this way, the foozle of pivot jerk value when convex cone rotates and concave-convex cone
It is not directly dependent upon, i.e., convex cone jerk value is not equal to concave-convex cone deviation from circular from amount, and according to actual measurement, jerk value when convex cone rotates is
The 1/5-1/10 of bumps cone deviation from circular from amount, therefore main shaft dynamic rotary precision can be improved using the dynamic and static pressure technology of liquid.
In addition, bushing is arranged on after being on the indent conical surface, the difficulty of processing requirement of bushing cavity substantially reduces, so as to carry
The high work efficiency of bushing cavity processing, reduces processing cost.
Further, static pressure bushing, the top of dynamic pressure bushing are above the indent conical surface, the requirement on machining accuracy of the indent conical surface
It is not high, have and improve work efficiency, reduce the effect of indent cone face process cost.
Further, static pressure bushing, dynamic pressure bushing are to be adhesively fixed to be connected with receiving component, have spy easy to process
Point.
Further, it is provided in the convex conical surface of revolving member along plane of arrangement opposite with static pressure cavity, dynamic pressure cavity
The annulus for the evagination answered substantially reduces the requirement on machining accuracy of convex conical surface, so as to improve work efficiency, reduces processing
Cost.
The above embodiment is the preferred case of the present invention, is not intended to limit protection scope of the present invention.
Claims (10)
1. a kind of dynamic and static pressure cone bearing shafting, which is characterized in that including：
At least one dynamic and static pressure cone bearing；And
Rotation axis is arranged in the dynamic and static pressure cone bearing,
Wherein, the dynamic and static pressure cone bearing has support base, accommodates component and rotating member,
The component that accommodates includes the receiving member with the indent conical surface and outer surface, multiple static pressure bushings and multiple dynamic pressures lining
Set,
The receiving member has multiple be used for through the static pressure passage of fluid and dynamic pressure passage, the static pressure passage and the dynamic pressure
Passage is separately positioned in the inner wall of the receiving member and penetrates through the indent conical surface and the outer surface,
The static pressure passage include being arranged on the first cavity for concaving on the indent conical surface and connect first cavity with
The static pressure duct of the outer surface,
The dynamic pressure passage include being arranged on the second cavity for concaving on the indent conical surface and connect second cavity with
The dynamic pressure duct of the outer surface,
The static pressure bushing have cylindrical static pressure cavity, the static pressure bushing be arranged on the opening of first cavity and
The static pressure cavity opening is connected towards the indent conical surface, the bottom of the static pressure cavity with first cavity,
The dynamic pressure bushing has dynamic pressure cavity, and the dynamic pressure bushing is arranged on the opening of second cavity and the dynamic pressure
The opening of cavity is connected towards the indent conical surface, the bottom of the dynamic pressure cavity with second cavity, and the dynamic pressure is recessed
The cross section of chamber from bottom to opening be gradually it is widened,
The rotating member has the convex conical surface to match with the indent conical surface, is arranged in the indent conical surface,
Multiple static pressure bushings and multiple dynamic pressure bushings are arranged on along at least one plane of arrangement on the indent conical surface,
The plane of arrangement is the plane of the rotation axis perpendicular to the rotating member,
The support base has the support base inner cavity to match with the outer surface of the receiving member, and the receiving member is arranged on the branch
It supports intracavitary in seat and is interference fitted with the support base inner cavity,
At least one first passage being connected with the static pressure duct is respectively arranged on the support base and is moved with described
At least one second channel that pressure duct is connected.
2. dynamic and static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the quantity of the static pressure bushing is at least 3, and the quantity of the dynamic pressure bushing is at least 3,
The taper of the indent conical surface is 60-150 degree, and the taper of the convex conical surface is 60-150 degree.
3. dynamic and static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the shape of the static pressure cavity accent be circular, ellipse, square, rectangle and it is trapezoidal in any one,
The both ends of section of the dynamic pressure cavity along the section of the plane of arrangement in crescent or along the plane of arrangement are in wedge
Shape, the shape of the dynamic pressure cavity accent is circular, ellipse, square, rectangle and it is trapezoidal in any one.
4. dynamic and static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, in the same plane of arrangement, multiple first cavitys and multiple second cavitys are uniform alternatings
It is arranged on the indent conical surface,
A plurality of isolation channel is also evenly arranged on the indent conical surface, the isolation channel is located at two adjacent first cavitys
Between second cavity, the elongated end of the isolation channel is intersected on the rotation axis of the revolving member,
The groove width of the isolation channel be 2-4mm, depth 2-5mm,
The surface of the indent conical surface and the convex conical surface is both provided with corrosion-inhibiting coating.
5. dynamic and static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the top end face of the static pressure bushing is higher than the indent conical surface,
The top end face of the dynamic pressure bushing is higher than the indent conical surface,
First cavity is cylindrical.
6. dynamic and static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the top end face of the static pressure bushing is the arcwall face coincideing with the indent conical surface and is kissed with the indent conical surface
It closes,
The top end face of the dynamic pressure bushing is the arcwall face coincideing with the indent conical surface and coincide with the indent conical surface.
7. dynamic and static pressure cone bearing shafting according to claim 1, it is characterised in that：
Wherein, the static pressure bushing is to be fixedly connected or be detachably connected with the receiving member,
The dynamic pressure bushing is to be fixedly connected or be detachably connected with the receiving member.
8. dynamic and static pressure cone bearing shafting according to claim 5 or 6, it is characterised in that：
Wherein, the depth of the indent of the static pressure cavity is 0.5-5mm,
The static pressure cavity total surface area accounts for the 20-60% of the indent conical surface total surface area,
The depth of the indent of the dynamic pressure cavity is 4-8mm, and the dynamic pressure cavity total surface area accounts for the indent conical surface total surface
Long-pending 20-60%,
Gap-ratio is 2-2.5, and the expression formula of the gap-ratio is h2/h1,
H2 is the distance of bottom and the convex conical surface of the dynamic pressure cavity, h1 be the dynamic pressure bushing top end face with it is described
The distance of convex conical surface.
9. a kind of precision machine tool, usage right requires the dynamic and static pressure cone bearing shafting described in any one, feature in 1-7 to exist
In：
Wherein, the rotation axis is the workpiece rotary shaft or tool rotating shaft in the precision machine tool.
10. precision machine tool according to claim 9, it is characterised in that：
Wherein, the precision machine tool is any one in lathe, grinding machine, boring machine, milling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404336.4A CN108105259A (en) | 2017-12-22 | 2017-12-22 | A kind of dynamic and static pressure cone bearing shafting and precision machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404336.4A CN108105259A (en) | 2017-12-22 | 2017-12-22 | A kind of dynamic and static pressure cone bearing shafting and precision machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108105259A true CN108105259A (en) | 2018-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711404336.4A Withdrawn CN108105259A (en) | 2017-12-22 | 2017-12-22 | A kind of dynamic and static pressure cone bearing shafting and precision machine tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN108105259A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925310A (en) * | 2019-12-20 | 2020-03-27 | 中铁工程装备集团有限公司 | TBM thoughtlessly moves base bearing structure |
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