CN105257701A - Hot oil carrying factor and hot oil carrying equation for multi-oil-pad type heavy hydrostatic bearing - Google Patents
Hot oil carrying factor and hot oil carrying equation for multi-oil-pad type heavy hydrostatic bearing Download PDFInfo
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- CN105257701A CN105257701A CN201510778435.3A CN201510778435A CN105257701A CN 105257701 A CN105257701 A CN 105257701A CN 201510778435 A CN201510778435 A CN 201510778435A CN 105257701 A CN105257701 A CN 105257701A
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- hydrostatic bearing
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Abstract
In an operation process of a multi-oil-pad type heavy hydrostatic bearing, an ideal state is that friction pairs are always in a fluid film lubricating form, but oil film heating is a main cause to lubricating failure, so that the friction pairs are possibly in a boundary lubricating form in operation and are liable to cause a bush burning condition. According to the invention, a lubricating mechanism of a single oil pad of the hydrostatic bearing is analyzed, a key area for generating hot oil carrying when the hydrostatic bearing rotates anticlockwise is determined, a hot oil carrying factor formula on the single oil pad of the heavy hydrostatic bearing is deduced, and an oil film temperature rise control equation under hot oil carrying influence is established, so that the processing efficiency and the operation efficiency of a static pressure shaft are improved, and the operation reliability of the hydrostatic bearing is improved. The hot oil carrying factor and the hot oil carrying equation for the multi-oil-pad type heavy static bearing are realized according to the following steps: step A, determining the key area for generating hot oil carrying on the single oil pad of the hydrostatic bearing; step B, deducing a hot oil carrying factor expression; and step C, deducing the hot oil carrying equation. The invention is applied to the hot oil carrying factor and the hot oil carrying equation for the multi-oil-pad type heavy hydrostatic bearing.
Description
Technical field
The present invention relates to the heavy hydrostatic bearing deep fat of heavy wool cushion and carry the factor and deep fat carries equation.
Background technique
The heavy hydrostatic bearing of heavy wool cushion is the core component in heavy equipment, in hydrostatic bearing running, perfect condition is in fluid film lubrication form between friction pair all the time, and oil film heating is the main cause causing lubrication failure, makes likely to be in boundary lubrication form in operation and very easily cause tile kilning.Based on this, the present invention is by analyzing the lubrication mechanism of the single lubricating pad of hydrostatic bearing, the key area that deep fat carries is produced when determining that hydrostatic bearing is rotated counterclockwise, the deep fat derived on the single lubricating pad of heavy hydrostatic bearing carries because of subformula, set up deep fat and carry the oil film temperature rise governing equation under affecting, this goal of the invention is to disclose the heavy hydrostatic bearing Heating mechanism of heavy wool pad, improving work efficiency and the running precision of static pressure axle.
Summary of the invention
The heavy hydrostatic bearing deep fat of heavy wool cushion carries the factor and deep fat carries equation
The heavy hydrostatic bearing deep fat of heavy wool cushion carries the factor and deep fat and carries equation and realize according to the following steps:
Steps A, determine the single lubricating pad of hydrostatic bearing produces the key area that deep fat carries.Single lubricating pad sealing oil edge punishment is slit into four fluid domains, and when worktable is rotated counterclockwise, all fluid domains to the right of sealing oil edge are the region that deep fat carries research emphatically.
Step B, derivation deep fat carry because subformula is as follows:
(1)
Wherein
In formula
for fluid kinematic viscosity,
for oil slick thickness,
for worktable rotary angular velocity,
for oil pocket and oil-return groove pressure difference, C
1, C
2for hydrostatic bearing structure parameter.
Step C, that derivation deep fat carries equation is as follows:
(2)
In formula
represent and consider that deep fat carries the actual oil temperature supplying of rear hydrostatic bearing,
,
represent that hydrostatic bearing is into and out of oil temperature respectively,
for fluid mass 5-6 participates in the oil liquid temperature after shearing.
Invention effect:
The present invention mainly determines the key area single lubricating pad of heavy hydrostatic bearing occurring deep fat and carries, be deduced deep fat and carry factor expression, draw the hydrostatic bearing of certain oil pad structure, when the load of bearing is determined, deep fat carries factor size and determined primarily of rotating speed of table, lubricating oil viscosity and oil film instantaneous thickness, and what wherein play major effect parameter is rotating speed of table.Deep fat of having derived carries the oil film temperature rise equation under impact, draw after hydrostatic bearing generation deep fat carries phenomenon, between friction pair, the oil temperature that enters of oil film is carried to affect by deep fat and is increased gradually, causes oil film temperature rise to increase faster, tile kilning phenomenon may be caused to occur.This, to effectively preventing heavy wool cushion heavy hydrostatic bearing tile kilning problem, improves the safe operation important in inhibiting of hydrostatic bearing simultaneously.
Accompanying drawing explanation
Fig. 1 is the single lubricating pad figure of heavy hydrostatic bearing in embodiment.
Fig. 2 is the static pressure round guide lubricating pad figure in embodiment.
Embodiment
The heavy hydrostatic bearing deep fat of heavy wool cushion carries the factor and deep fat and carries equation and realize according to the following steps:
Steps A, to determine the single lubricating pad of hydrostatic bearing produces the key area that deep fat carries as follows:
As shown in Figure 1, single lubricating pad sealing oil edge punishment is slit into 1-2,3-4,5-6,7-8 tetra-fluid domains, what participate in that deep fat carries research mainly comprises shear flow and Differential pressure flow, when worktable is rotated counterclockwise, it is consistent that shear flow direction and deep fat carry direction, and shear flow and depend primarily on hydrostatic bearing running speed and oil slick thickness, once hydrostatic bearing reaches a certain higher rotation speed, when shearing flow is greater than differential pressure flow, sealing oil edge week to the right 7-8 place fluid domain occur that lubricant oil is in oil pocket during mobility status, just there occurs deep fat and carries.Then all 7-8 place fluid domains to the right of sealing oil edge are the region that deep fat carries research emphatically.
Step B, derivation deep fat carry because subformula is as follows:
When there being deep fat to carry phenomenon, carry principle according to deep fat,
be expressed as form
(1)
In formula
for the deep fat flow that the 5-6 region of a upper lubricating pad is flowed out.
The heavy hydrostatic bearing that the present invention studies belongs to heavy wool cushion guide rail structure, for ten meter numerical control vertical lathe DVT1000 series, as shown in Figure 2, static pressure round guide generally comprises 24 lubricating pads and is circumferentially being symmetric, then circumferentially each lubricating pad mobility status is also periodically.In formula (1)
the deep fat flow that the 5-6 region of namely going up a lubricating pad is flowed out is identical with the deep fat flow that the 5-6 region of next lubricating pad is flowed out, and deep fat carries research main consideration circumferential flow situation, so emphasis is considered to shear flow and differential pressure flow.
Based on this, deep fat carries the factor
form can be expressed as follows
(2)
Flow equation to be substituted in above formula (2) and arrange and can derive deep fat and carry the factor
expression be
(3)
Wherein
In formula
for fluid kinematic viscosity,
for oil slick thickness,
for worktable rotary angular velocity,
for oil pocket and oil-return groove pressure difference, C
1, C
2for hydrostatic bearing structure parameter.
Draw from formula (3) analysis, the hydrostatic bearing of certain oil pad structure, when the load of bearing is determined, deep fat carries factor size and determined primarily of rotating speed of table, lubricating oil viscosity and oil film instantaneous thickness, and what wherein play major effect parameter is rotating speed of table.
Step C, that derivation deep fat carries equation is as follows:
Deep fat carries temperature rise governing equation and is expressed as
(4)
In formula
,
represent that hydrostatic bearing is into and out of oil temperature respectively,
represent and consider that deep fat carries the actual oil temperature supplying of rear hydrostatic bearing,
for deep fat carries the factor.
As can be seen from above-mentioned researching and analysing, deep fat carries the parameter in governing equation
also should regard that the lubricating oil temperature after shearing is participated in 5-6 fluid mass namely as
, when hydrostatic support oil temperature supplying is
time, the oil film temperature rise governing equation that deep fat carries under impact is expressed as follows
(5)
Deep fat is carried the factor to substitute into above formula and arrange and derive heavy wool cushion hydrostatic bearing deep fat to carry equation as follows
(6)
In formula
represent and consider that deep fat carries the actual oil temperature supplying of rear hydrostatic bearing,
,
represent that hydrostatic bearing is into and out of oil temperature respectively,
for fluid mass 5-6 participates in the oil liquid temperature after shearing.
Present embodiment effect:
The present invention mainly determines the key area single lubricating pad of heavy hydrostatic bearing occurring deep fat and carries, be deduced deep fat and carry factor expression, draw the hydrostatic bearing of certain oil pad structure, when the load of bearing is determined, deep fat carries factor size and determined primarily of rotating speed of table, lubricating oil viscosity and oil film instantaneous thickness, and what wherein play major effect parameter is rotating speed of table.Deep fat of having derived carries the oil film temperature rise equation under impact, draw after hydrostatic bearing generation deep fat carries phenomenon, between friction pair, the oil temperature that enters of oil film is carried to affect by deep fat and is increased gradually, causes oil film temperature rise to increase faster, tile kilning phenomenon may be caused to occur.This, to effectively preventing heavy wool cushion heavy hydrostatic bearing tile kilning problem, improves the safe operation important in inhibiting of hydrostatic bearing simultaneously.
Claims (2)
1. the heavy hydrostatic bearing deep fat of heavy wool cushion carries the factor and deep fat carries equation, it is characterized in that by analyzing the lubrication mechanism of the single lubricating pad of hydrostatic bearing, the key area that deep fat carries is produced when determining that hydrostatic bearing is rotated counterclockwise, the deep fat derived on the single lubricating pad of heavy hydrostatic bearing carries because of subformula, set up deep fat and carry the oil film temperature rise governing equation under affecting, this goal of the invention is to disclose the heavy hydrostatic bearing Heating mechanism of heavy wool pad, improving work efficiency and the running precision of static pressure axle;
The heavy hydrostatic bearing deep fat of heavy wool cushion carries the factor and deep fat and carries equation and realize according to the following steps:
Steps A, determine the single lubricating pad of hydrostatic bearing produces the key area that deep fat carries;
Single lubricating pad sealing oil edge punishment is slit into four fluid domains, and when worktable is rotated counterclockwise, all fluid domains to the right of sealing oil edge are the region that deep fat carries research emphatically;
Step B, derivation deep fat carry because subformula is as follows:
(1)
Wherein
In formula
for fluid kinematic viscosity,
for oil slick thickness,
for worktable rotary angular velocity,
for oil pocket and oil-return groove pressure difference,
,
for hydrostatic bearing structure parameter;
Step C, that derivation deep fat carries equation is as follows:
(2)
In formula
represent and consider that deep fat carries the actual oil temperature supplying of rear hydrostatic bearing,
,
represent that hydrostatic bearing is into and out of oil temperature respectively,
for fluid mass 5-6 participates in the oil liquid temperature after shearing.
2. the heavy hydrostatic bearing deep fat of heavy wool cushion according to claim 1 carries the factor and deep fat carries equation, it is characterized in that when heavy hydrostatic bearing worktable is rotated counterclockwise, determining the single lubricating pad of hydrostatic bearing produces the region that deep fat carries is 7-8 place fluid domain, when shearing flow and being greater than differential pressure flow, derive deep fat and carry factor expression and deep fat carries equation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510778435.3A CN105257701B (en) | 2015-11-16 | 2015-11-16 | Heavy wool cushion heavy type hydrostatic bearing deep fat carries the factor and deep fat carries equation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510778435.3A CN105257701B (en) | 2015-11-16 | 2015-11-16 | Heavy wool cushion heavy type hydrostatic bearing deep fat carries the factor and deep fat carries equation |
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| Publication Number | Publication Date |
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| CN105257701A true CN105257701A (en) | 2016-01-20 |
| CN105257701B CN105257701B (en) | 2018-01-19 |
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|---|---|---|---|
| CN201510778435.3A Expired - Fee Related CN105257701B (en) | 2015-11-16 | 2015-11-16 | Heavy wool cushion heavy type hydrostatic bearing deep fat carries the factor and deep fat carries equation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002569A (en) * | 2018-01-12 | 2018-12-14 | 哈尔滨理工大学 | A method of establishing static pressure oil film motion layer boundary condition |
| CN111503152A (en) * | 2020-04-21 | 2020-08-07 | 南京工程学院 | Temperature rise control method for hydrostatic circular guide rail inclined plane oil pad |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB479723A (en) * | 1936-06-02 | 1938-02-10 | Cincinnati Grinders Inc | Bearing |
| CN202732698U (en) * | 2012-06-29 | 2013-02-13 | 中国工程物理研究院总体工程研究所 | Composite static pressure oil film slipway with large bearing capacity for centrifuge vibration table |
| CN103256305A (en) * | 2013-05-30 | 2013-08-21 | 哈尔滨理工大学 | Tilting-type oil pad of hydrostatic thrust bearing |
| CN103438097A (en) * | 2013-08-30 | 2013-12-11 | 哈尔滨理工大学 | Two-way dynamic-static pressure mixture lubrication thrust bearing |
| CN103615467A (en) * | 2013-12-19 | 2014-03-05 | 哈尔滨理工大学 | Method for optimizing oil chamber size of hydrostatic thrust bearing under certain load |
-
2015
- 2015-11-16 CN CN201510778435.3A patent/CN105257701B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB479723A (en) * | 1936-06-02 | 1938-02-10 | Cincinnati Grinders Inc | Bearing |
| CN202732698U (en) * | 2012-06-29 | 2013-02-13 | 中国工程物理研究院总体工程研究所 | Composite static pressure oil film slipway with large bearing capacity for centrifuge vibration table |
| CN103256305A (en) * | 2013-05-30 | 2013-08-21 | 哈尔滨理工大学 | Tilting-type oil pad of hydrostatic thrust bearing |
| CN103438097A (en) * | 2013-08-30 | 2013-12-11 | 哈尔滨理工大学 | Two-way dynamic-static pressure mixture lubrication thrust bearing |
| CN103615467A (en) * | 2013-12-19 | 2014-03-05 | 哈尔滨理工大学 | Method for optimizing oil chamber size of hydrostatic thrust bearing under certain load |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002569A (en) * | 2018-01-12 | 2018-12-14 | 哈尔滨理工大学 | A method of establishing static pressure oil film motion layer boundary condition |
| CN111503152A (en) * | 2020-04-21 | 2020-08-07 | 南京工程学院 | Temperature rise control method for hydrostatic circular guide rail inclined plane oil pad |
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|---|---|
| CN105257701B (en) | 2018-01-19 |
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