CN201944119U - Static-pressure bearing with internal-feedback throttling return oil - Google Patents
Static-pressure bearing with internal-feedback throttling return oil Download PDFInfo
- Publication number
- CN201944119U CN201944119U CN2011200252292U CN201120025229U CN201944119U CN 201944119 U CN201944119 U CN 201944119U CN 2011200252292 U CN2011200252292 U CN 2011200252292U CN 201120025229 U CN201120025229 U CN 201120025229U CN 201944119 U CN201944119 U CN 201944119U
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Abstract
A static-pressure bearing with internal-feedback throttling return oil consists of an oil supply system, a bearing body 1 and four static-pressure oil cavities 2, wherein internal-feedback throttling oil return devices 4 are installed on the inner wall, near a end part of the bearing body of the static-pressure bearing; the static-pressure oil cavities are arranged at inner holes of the bearing body; angles formed among the four static-pressure oil cavities on an inner circumference wall are 90 degrees; the internal-feedback throttling oil return devices are respectively arranged in the radial direction of each static-pressure oil cavity of the bearing body vertical to the axis of a spindle 3, have cylindrical structures and are provided with axial oil return holes at the centers of the devices; and the end surfaces of the internal-feedback throttling oil return devices press close to the external arc surface of the spindle. The static-pressure bearing has two oil drainage paths; and in one path, oil leaks from a gap between the spindle and the bearing, and in another path, the oil leaks from a gap between the spindle and a feedback part. The proportion of oil leakage of the two paths can be adjusted by appropriate structural design, so that the spindle can have larger bearing capacity under tiny displacement. The static-pressure bearing is suitable for bearing a spindle of head and tail frames of a crankshaft grinding machine.
Description
Technical field
The utility model relates to a kind of hydrostatic bearing with internal feedback throttling oil return, belongs to the machine tool chief axis technical field.
Background technique
Hydrostatic bearing is outer supply pressure oil, sets up static pressure carrying oil film to realize the sliding bearing of liquid lubrication in bearing.Hydrodynamic journal liquid polymers are worked under liquid lubrication from start to stopping all the time, thus not wearing and tearing, long service life, starting power is little, also can use under the speed of extremely low (even being zero).In addition, this bearing also have running accuracy height, oil film rigidity big, can suppress advantage such as oil whip, but need special-purpose fuel tank supply pressure oil, power consumption is bigger during high speed.
For the highi degree of accuracy crankshaft grinding machine, its end to end frame generally adopt the hydrostatic bearing structural design, but in common hydrostatic bearing design process, its static pressure oil pocket project organization is two kinds, a kind of have a circumferential oil-return groove, another kind ofly is no circumferential oil-return groove.These two kinds of hydrostatic bearing structures can produce big displacement at big carrying lower main axis, thereby influence crank processing precision.Therefore need the hydrostatic bearing structure is carried out suitable improvement, in order to strengthen main shaft rigidity and bearing capacity.
Summary of the invention
The purpose of this utility model is, designs a kind ofly to utilize gap of main reinforcement to change to feed back the device of the oil return of controlling and regulate each static pressure oil pocket, to strengthen the rigidity and the bearing capacity of main shaft, satisfy the needs of highi degree of accuracy crankshaft grinding machine.
The technological scheme that the utility model adopted is: utilize gap of main reinforcement to change and feed back the oil return of controlling and regulate each static pressure oil pocket, thereby control the pressure of each static pressure oil pocket, and then the displacement of control main shaft, so only produce very little displacement at bigger loading condition lower main axis.
The hydrostatic bearing of the utility model band internal feedback throttling oil return is made up of oil supply system, bearing support, internal feedback throttling oil scavenger, static pressure oil pocket, the static pressure oil pocket is the enclosed cavity that is made of rectangle oil groove on the brearing bore and main shaft, 4 static pressure oil pocket positions are mutually 90 ° on the inner peripheral wall, internal feedback throttling oil scavenger is installed in respectively in the radial position of each static pressure oil pocket of the bearing support vertical with main-shaft axis, internal feedback throttling oil scavenger is a cylindrical structural, there is an axial spill port at its center, and the end face of internal feedback throttling oil scavenger is pressed close to the main shaft exterior arc surface.
The utility model beneficial effect compared with the prior art is that the utility model structure hydrostatic bearing increases a part that is used for the gap feedback at each oil pocket inner end on common hydrostatic bearing basis.In the middle of this part a spill port is arranged, the oil of oil pocket converges to spill port by the gap between main shaft and this part.The draining path of hydrostatic bearing has two kinds simultaneously like this: the one tunnel is to release from the gap between main shaft and the bearing, and another road is that main shaft releases with the gap between the feedback part.The ratio of regulating this two-way draining by suitable structural design can reach under main shaft micro-displacement situation and possess bigger bearing capacity.
The utility model is applicable to highi degree of accuracy grinding machine head stock tailstock spindle supportings such as crankshaft grinding machine.
Description of drawings
Fig. 1 is the sectional view of the structure of band internal feedback hydrostatic bearing;
Fig. 2 is the cross section view of the structure of band internal feedback hydrostatic bearing;
Fig. 3 is the utility model embodiment hydrostatic bearing headstock structural representation;
Picture in picture number expression: the 1st, bearing support; The 2nd, the static pressure oil pocket; The 3rd, main shaft; The 4th, internal feedback throttling oil scavenger; The 5th, thrust ring; The 6th, bonnet; The 7th, casing; The 8th, protecgulum; The 11st, fore bearing; The 12nd, rear bearing.
Embodiment
The utility model is specifically implemented on the frame main shaft end to end at the MQ8260 crankshaft grinding machine.
Fig. 3 is a hydrostatic bearing headstock structural representation, among the figure end to end frame form by main shaft 3, casing 7, fore bearing 11, rear bearing 12, bonnet 6, protecgulum 8 and thrust ring 5 etc.Fore bearing 11 is the hydrostatic bearing of being with internal feedback throttling oil return with rear bearing 12, internal feedback throttling oil scavenger 4 is separately positioned in the radial position in each static pressure oil pocket of front and back bearings, internal feedback throttling oil scavenger 4 centers are spill port, and oilhole is over against the main shaft exterior arc surface.The draining path of hydrostatic bearing has two kinds simultaneously like this, and one the tunnel is to release from the gap between main shaft and the bearing, and another road is that main shaft releases with the gap between the feedback part.After the hydrostatic bearing of band internal feedback throttling oil return has been installed on the frame main shaft end to end at the MQ8260 crankshaft grinding machine, improved the bearing capacity of frame main shaft end to end greatly.
Claims (1)
1. hydrostatic bearing with internal feedback throttling oil return, form by oil supply system, bearing support, static pressure oil pocket, it is characterized in that, described static pressure oil pocket is positioned at the bearing support endoporus, four static pressure oil pocket positions are mutually 90 ° on the inner peripheral wall, and internal feedback throttling oil scavenger is installed in respectively in the radial position of each static pressure oil pocket of the bearing support vertical with main-shaft axis; Described internal feedback throttling oil scavenger is a cylindrical structural, and there is an axial spill port at its center, and the end face of internal feedback throttling oil scavenger is pressed close to the main shaft exterior arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200252292U CN201944119U (en) | 2011-01-26 | 2011-01-26 | Static-pressure bearing with internal-feedback throttling return oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200252292U CN201944119U (en) | 2011-01-26 | 2011-01-26 | Static-pressure bearing with internal-feedback throttling return oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201944119U true CN201944119U (en) | 2011-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200252292U Expired - Lifetime CN201944119U (en) | 2011-01-26 | 2011-01-26 | Static-pressure bearing with internal-feedback throttling return oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201944119U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954107A (en) * | 2012-12-14 | 2013-03-06 | 贵阳险峰机床有限责任公司 | High-rigidity double-line liquid hydrostatic bearing |
| CN103195811A (en) * | 2013-04-28 | 2013-07-10 | 昆明学院 | Novel hollow axial energy-saving hydrostatic bearing |
| CN103990819A (en) * | 2014-05-04 | 2014-08-20 | 玉环县新跃机床有限公司 | Spindle device of high-speed double-end collet chuck numerically-controlled machine tool |
| CN109676520A (en) * | 2018-12-14 | 2019-04-26 | 广州市昊志机电股份有限公司 | A kind of intracavitary internal-feedback throttling fluid pressure electro spindle |
| CN109702501A (en) * | 2018-12-14 | 2019-05-03 | 广州市昊志机电股份有限公司 | Intracavitary feedback throttle static pressure turntable |
| CN111594548A (en) * | 2020-07-06 | 2020-08-28 | 德本恒嘉精机(昆山)有限公司 | Hydrostatic bearing sleeve |
| CN114321191A (en) * | 2022-01-26 | 2022-04-12 | 湖大海捷(湖南)工程技术研究有限公司 | Axial fixing structure of static pressure main shaft |
| CN114523416A (en) * | 2022-03-14 | 2022-05-24 | 浙江杰克智能装备有限公司 | Dynamic pressure main shaft assembly |
-
2011
- 2011-01-26 CN CN2011200252292U patent/CN201944119U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954107A (en) * | 2012-12-14 | 2013-03-06 | 贵阳险峰机床有限责任公司 | High-rigidity double-line liquid hydrostatic bearing |
| CN102954107B (en) * | 2012-12-14 | 2015-07-01 | 贵阳险峰机床有限责任公司 | High-rigidity double-line liquid hydrostatic bearing |
| CN103195811A (en) * | 2013-04-28 | 2013-07-10 | 昆明学院 | Novel hollow axial energy-saving hydrostatic bearing |
| CN103990819A (en) * | 2014-05-04 | 2014-08-20 | 玉环县新跃机床有限公司 | Spindle device of high-speed double-end collet chuck numerically-controlled machine tool |
| CN109676520A (en) * | 2018-12-14 | 2019-04-26 | 广州市昊志机电股份有限公司 | A kind of intracavitary internal-feedback throttling fluid pressure electro spindle |
| CN109702501A (en) * | 2018-12-14 | 2019-05-03 | 广州市昊志机电股份有限公司 | Intracavitary feedback throttle static pressure turntable |
| CN111594548A (en) * | 2020-07-06 | 2020-08-28 | 德本恒嘉精机(昆山)有限公司 | Hydrostatic bearing sleeve |
| CN111594548B (en) * | 2020-07-06 | 2023-09-19 | 德本恒嘉精机(昆山)有限公司 | Hydrostatic bearing sleeve |
| CN114321191A (en) * | 2022-01-26 | 2022-04-12 | 湖大海捷(湖南)工程技术研究有限公司 | Axial fixing structure of static pressure main shaft |
| CN114321191B (en) * | 2022-01-26 | 2024-05-14 | 湖大海捷(湖南)工程技术研究有限公司 | Static pressure main shaft axial fixing structure |
| CN114523416A (en) * | 2022-03-14 | 2022-05-24 | 浙江杰克智能装备有限公司 | Dynamic pressure main shaft assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |
|
| CX01 | Expiry of patent term |