阅读说明：本技术 一种高精度动静压主轴系统 (High-precision dynamic and static pressure main shaft system ) 是由 赵怀 明德利 明瑞龙 于 2020-12-24 设计创作，主要内容包括：本发明公开了一种高精度动静压主轴系统,包括主轴以及套设于主轴外部的套筒,所述主轴和套筒之间的相对两端分别设有轴承,所述套筒的侧壁内设有沿着套筒的周向方向设置的进油环孔和出油环孔,所述轴承的外侧壁上设有第一环槽,所述第一环槽与进油环孔之间通过进油通道连通,所述轴承的内侧壁上设有若干个承载油槽,所述承载油槽与第一环槽之间通过第二进油孔连通,所述轴承的内侧壁上设有若干个回流槽,所述回流槽与承载油槽依次间隔设置,所述套筒的内侧壁上设有第二环槽,第二环槽与出油环孔之间通过出油通道连通,所述第二环槽与回流槽之间通过第一回流孔连通。本发明结构简单,设计合理,装配方便快捷且使用稳定性好。(The invention discloses a high-precision dynamic and static pressure main shaft system, which comprises a main shaft and a sleeve sleeved outside the main shaft, bearings are respectively arranged at two opposite ends between the main shaft and the sleeve, an oil inlet annular hole and an oil outlet annular hole are arranged in the side wall of the sleeve along the circumferential direction of the sleeve, the outer side wall of the bearing is provided with a first ring groove, the first ring groove is communicated with the oil inlet ring hole through an oil inlet channel, a plurality of bearing oil grooves are arranged on the inner side wall of the bearing, the bearing oil grooves are communicated with the first ring groove through second oil inlet holes, a plurality of reflux grooves are arranged on the inner side wall of the bearing, the reflux grooves and the bearing oil grooves are arranged at intervals in sequence, be equipped with the second annular on telescopic inside wall, communicate through an oil channel between second annular and the oil ring hole, communicate through first backward flow hole between second annular and the backward flow groove. The invention has the advantages of simple structure, reasonable design, convenient and quick assembly and good use stability.)

1. The utility model provides a high accuracy hybrid main shaft system, includes main shaft system body, its characterized in that: the main shaft system body comprises a main shaft (1) and a sleeve (2) sleeved outside the main shaft (1), wherein bearings (3) are respectively arranged at two opposite ends between the main shaft (1) and the sleeve (2), end parts of two opposite ends of the sleeve (2) are respectively provided with an end cover (4) used for fixing the bearings (3), an oil inlet annular hole (5) and an oil outlet annular hole (6) which are arranged along the circumferential direction of the sleeve (2) are arranged in the side wall of the sleeve (2) and correspond to the position of the axis of the sleeve (2), the oil inlet annular hole (5) and the oil outlet annular hole (6) are coaxially arranged, a first oil inlet hole (7) communicated with the oil inlet annular hole (5) is arranged on the side wall of the sleeve (2), a first oil outlet hole (8) communicated with the oil outlet annular hole (6) is further arranged on the side wall of the sleeve (2), a first annular groove (9) arranged along the circumferential direction of the bearing (3) is arranged on the outer side wall of the bearing (3), communicate through a plurality of oil feed passageway (10) between first annular (9) and oil feed annular hole (5), oil feed passageway (10) sets up inside sleeve (2), the one end and the oil feed annular hole (5) of oil feed passageway (10) communicate, the other end of oil feed passageway (10) runs through in the inside wall of sleeve (2) and corresponding with first annular (9), be equipped with a plurality of on the inside wall of bearing (3) along the inside wall circumference direction evenly distributed's of bearing (3) bearing oil groove (11), communicate through second inlet port (12) between bearing oil groove (11) and first annular (9), be equipped with on the inside wall of bearing (3) a plurality of along inside wall circumference direction evenly distributed's of bearing (3) backward flow groove (13), backward flow groove (13) with bear oil groove (11) and set up at an interval in proper order, on the inside wall of sleeve (2) and with the corresponding position department of backwash groove (13) be equipped with second annular (14) that set up along the circumferential direction of sleeve (2) inside wall, through a plurality of oil outlet channel (15) intercommunication between second annular (14) and oil outlet ring hole (6), communicate through a plurality of first backwash hole (16) between second annular (14) and backwash groove (13), first backwash hole (16) set up inside bearing (3), just the one end and backwash groove (13) intercommunication of first backwash hole (16), the other end of first backwash hole (16) runs through in bearing (3) lateral wall and corresponding with second annular (14).

2. The high-precision dynamic and static pressure main shaft system according to claim 1, characterized in that: the position of the main shaft (1) connected with the bearing (3) is of a frustum-shaped structure, and the inner side wall structure of the bearing (3) is matched with the outer side wall structure of the main shaft.

3. The high-precision dynamic and static pressure main shaft system according to claim 1, characterized in that: the bearing device is characterized in that a bearing table (17) arranged along the circumferential direction of the inner side wall of the sleeve (2) is arranged on the inner side wall of the sleeve (2) and at a position corresponding to one end, away from the end cover (4), of the bearing (3), and the corresponding end of the bearing (3) is abutted to the bearing table (17).

Technical Field

The invention relates to a machine tool spindle system, in particular to a high-precision dynamic and static pressure spindle system.

Background

With the acceleration of the industrialization process, the future manufacturing industry will develop towards high-precision, high-efficiency automation and intellectualization. In the process of mechanical manufacturing, along with the improvement of the requirement on the precision of products, the requirements on the machining precision and the stability of machine tool parts are higher and higher, and the precision spindle is increasingly used in the industry to replace the traditional spindle for machining such as turning, milling, grinding and the like. The dynamic and static pressure main shaft system is widely applied to precision machining and even ultrahigh precision machining due to high rotating speed, high rigidity, good machining precision and long service life.

The dynamic and static pressure main shaft system has the working principle that a plurality of oil cavities are formed in the side wall of the inner ring of the bearing, oil liquid pressure in the oil cavities jointly acts on the rotating shaft, the rotating shaft is subjected to static pressure balancing force to enable the rotating shaft to be suspended in an oil film, and when the rotating shaft rotates, the oil film soft contact between the rotating shaft and the bearing is realized by utilizing the hydrodynamic pressure effect, so that the friction coefficient is small and is close to zero abrasion. However, most of the hybrid main shaft systems conventionally used in the prior art are complex in structure, many in parts, high in assembly requirement and poor in precision retentivity, and therefore the requirements of people cannot be met.

Disclosure of Invention

In order to solve the problems, the invention provides the high-precision dynamic and static pressure main shaft system which is simple in structure, reasonable in design, convenient and fast to assemble and good in use stability.

The invention adopts the following technical scheme:

the utility model provides a high accuracy hybrid main shaft system, includes main shaft system body, main shaft system body includes that main shaft and cover locate the outside sleeve of main shaft, relative both ends between main shaft and the sleeve are equipped with the bearing respectively, telescopic relative both ends tip is equipped with respectively and is used for the fixed end cover with the bearing, in the lateral wall of sleeve and the position department corresponding to the sleeve axle center be equipped with along telescopic circumference direction setting oil feed annular ring and the annular hole that produces oil, oil feed annular ring and the annular hole that produces oil are coaxial setting, be equipped with the first inlet port that communicates with the oil feed annular ring on the lateral wall of sleeve, still be equipped with the first outlet port that communicates with the annular hole that produces oil on the lateral wall of sleeve, be equipped with the first annular groove that sets up along the lateral wall circumference direction of bearing on the lateral wall of bearing, communicate through a plurality of oil feed passageway between first annular groove and the oil feed annular hole, the oil inlet channel is arranged inside the sleeve, one end of the oil inlet channel is communicated with the oil inlet annular hole, the other end of the oil inlet channel penetrates through the inner side wall of the sleeve and corresponds to the first annular groove, a plurality of bearing oil grooves which are uniformly distributed along the circumferential direction of the inner side wall of the bearing are arranged on the inner side wall of the bearing, the bearing oil grooves are communicated with the first annular groove through the second oil inlet hole, a plurality of backflow grooves which are uniformly distributed along the circumferential direction of the inner side wall of the bearing are arranged on the inner side wall of the bearing, the backflow grooves and the bearing oil grooves are sequentially arranged at intervals, a second annular groove which is arranged along the circumferential direction of the inner side wall of the sleeve is arranged on the inner side wall of the sleeve and corresponds to the backflow grooves, the second annular groove is communicated with the oil outlet annular hole through a plurality of oil outlet channels, and the second annular, the first backflow hole is arranged inside the bearing, one end of the first backflow hole is communicated with the backflow groove, and the other end of the first backflow hole penetrates through the outer side wall of the bearing and corresponds to the second annular groove.

As a preferable technical scheme of the invention, the position of the main shaft, which is connected with the bearing, is of a frustum-shaped structure, and the inner side wall structure of the bearing is matched with the outer side wall structure of the main shaft.

As a preferable technical solution of the present invention, a receiving platform disposed along a circumferential direction of an inner side wall of the sleeve is disposed on the inner side wall of the sleeve and at a position corresponding to an end of the bearing away from the end cover, and a corresponding end of the bearing abuts against the receiving platform.

The invention has the beneficial effects that:

the hydraulic pressure consistency control device is simple in structure, reasonable in design and convenient and rapid in overall assembly, and meanwhile, the oil inlet annular hole, the oil outlet annular hole, the first annular groove and the second annular groove can effectively guarantee hydraulic pressure consistency at each position inside the main shaft system body when in use, so that the stability of the main shaft system body in use is effectively guaranteed, and the use effect of the main shaft system body is improved.

Drawings

FIG. 1 is a schematic longitudinal cross-sectional view of a high-precision hybrid spindle system corresponding to a position of a bearing oil groove according to the present invention;

FIG. 2 is a schematic longitudinal cross-sectional view of a high-precision hybrid spindle system corresponding to a position of a reflux groove according to the present invention;

FIG. 3 is a schematic cross-sectional view of the sleeve at a location corresponding to the axial center of the sleeve according to the present invention;

the symbols in the drawings illustrate that:

the bearing comprises a main shaft 1, a sleeve 2, a bearing 3, an end cover 4, an oil inlet annular hole 5, an oil outlet annular hole 6, a first oil inlet hole 7, a first oil outlet hole 8, a first annular groove 9, an oil inlet channel 10, a bearing oil groove 11, a second oil inlet hole 12, a backflow groove 13, a second annular groove 14, an oil outlet channel 15, a first backflow hole 16 and a bearing platform 17.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, a high-precision hybrid spindle system includes a spindle system body, the spindle system body includes a spindle 1 and a sleeve 2 sleeved outside the spindle 1, bearings 3 are respectively disposed at two opposite ends between the spindle 1 and the sleeve 2, and end caps 4 for fixing the bearings 3 are respectively disposed at two opposite ends of the sleeve 2;

an oil inlet annular hole 5 and an oil outlet annular hole 6 which are arranged along the circumferential direction of the sleeve 2 are arranged in the side wall of the sleeve 2 and at the position corresponding to the axis of the sleeve 2, the oil inlet ring hole 5 and the oil outlet ring hole 6 are coaxially arranged, a first oil inlet hole 7 communicated with the oil inlet ring hole 5 is arranged on the side wall of the sleeve 2, the side wall of the sleeve 2 is also provided with a first oil outlet 8 communicated with the oil outlet annular hole 6, the outer side wall of the bearing 3 is provided with a first annular groove 9 arranged along the circumferential direction of the outer side wall of the bearing 3, the first ring groove 9 is communicated with the oil inlet ring hole 5 through a plurality of oil inlet channels 10, specifically, the oil inlet channel 10 is arranged in the sleeve 2, one end of the oil inlet channel 10 is communicated with the oil inlet annular hole 5, the other end of the oil inlet channel 10 penetrates through the inner side wall of the sleeve 2 and corresponds to the first annular groove 9;

the bearing structure is characterized in that a plurality of bearing oil grooves 11 which are uniformly distributed along the circumferential direction of the inner side wall of the bearing 3 are formed in the inner side wall of the bearing 3, in the embodiment, the number of the bearing oil grooves 11 is four, in the actual production process, a person skilled in the art can determine the number of the bearing oil grooves 11 according to actual needs, for example, two, three or five bearing oil grooves can be formed, the bearing oil grooves 11 are communicated with the first ring groove 9 through second oil inlet holes 12, a plurality of backflow grooves 13 which are uniformly distributed along the circumferential direction of the inner side wall of the bearing 3 are formed in the inner side wall of the bearing 3, specifically, in the embodiment, the number of the backflow grooves 13 is four, and the backflow grooves 13 and the bearing oil grooves 11 are sequentially arranged at intervals;

further, a second annular groove 14 arranged along the circumferential direction of the inner side wall of the sleeve 2 is arranged on the inner side wall of the sleeve 2 and at a position corresponding to the backflow groove 13, the second annular groove 14 is communicated with the oil outlet annular hole 6 through a plurality of oil outlet channels 15, the second annular groove 14 is communicated with the backflow groove 13 through a plurality of first backflow holes 16, the first backflow holes 16 are arranged inside the bearing 3, one end of each first backflow hole 16 is communicated with the backflow groove 13, and the other end of each first backflow hole 16 penetrates through the outer side wall of the bearing 3 and corresponds to the second annular groove 14;

furthermore, the position of the main shaft 1 connected with the bearing 3 is in a frustum-shaped structure, and the inner side wall structure of the bearing 3 is matched with the outer side wall structure of the main shaft;

furthermore, a bearing platform 17 arranged along the circumferential direction of the inner side wall of the sleeve 2 is arranged on the inner side wall of the sleeve 2 and at a position corresponding to one end of the bearing 3 far away from the end cover 4, and the corresponding end of the bearing 3 abuts against the bearing platform 17.

Finally, it should be noted that: these embodiments are merely illustrative of the present invention and do not limit the scope of the present invention. In addition, other variations and modifications will be apparent to persons skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.