CN213004624U - Internal feedback precise closed static pressure rotary table - Google Patents
Internal feedback precise closed static pressure rotary table Download PDFInfo
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- CN213004624U CN213004624U CN202021828430.XU CN202021828430U CN213004624U CN 213004624 U CN213004624 U CN 213004624U CN 202021828430 U CN202021828430 U CN 202021828430U CN 213004624 U CN213004624 U CN 213004624U
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Abstract
The utility model relates to an accurate closed static pressure revolving stage of internal feedback is a novel special structural style of constant voltage fuel feeding, flow controller are built-in, gap throttle. Mainly include base, interior reaction type hydrostatic bearing, workstation, torque motor stator, torque motor rotor, transmission shaft and driving disc, its innovation point is: one path of hydraulic oil enters the lower pressure-bearing oil cavity after being throttled by the throttling structure in the upper pressure-bearing oil cavity, and the other path of hydraulic oil enters the upper pressure-bearing oil cavity after being throttled by the throttling structure in the lower pressure-bearing oil cavity to form an axial closed static pressure structure; one path of hydraulic oil flows into the opposite side pressure-bearing oil cavity through the throttling structure in the side pressure-bearing oil cavity, and the other path of hydraulic oil flows into the side pressure-bearing oil cavity through the throttling structure in the opposite side pressure-bearing oil cavity to form a radial closed static pressure structure. The invention greatly improves the bearing rigidity and the anti-overturning capability of the rotary table, is applied to grinding processing equipment, and effectively improves the grinding dimensional precision of a machine tool and the surface quality of a workpiece.
Description
Technical Field
The utility model belongs to the technical field of the static pressure revolving stage, concretely relates to accurate closed static pressure revolving stage of internal feedback.
Background
The conventional static pressure rotary table is structurally characterized in that a throttler is arranged outside a workbench, so that the periphery of the workbench is provided with a plurality of pipelines, the appearance and the functionality are poor, and the steps of adjusting the flow and the pressure of the workbench are complicated. The radial static pressure and the axial static pressure are divided into two parts, and are not integrated on a static pressure bearing, so that a plurality of accumulated errors can be added on the structure of the whole workbench, the assembly difficulty is increased, and the whole precision of the workbench is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, provide one kind can increase substantially the rigidity of revolving stage and anti-tilt ability, improve the reliability that the revolving stage used, improve the precision of workstation, reduce the accurate closed static pressure revolving stage of internal feedback of external pipeline.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides an accurate closed static pressure revolving stage of internal feedback which characterized in that: the device comprises a base, an internal feedback type hydrostatic bearing, a workbench, a torque motor stator, a torque motor rotor, a transmission shaft and a transmission disc;
the inner feedback type hydrostatic bearing comprises an upper guide rail, a lower guide rail, a hydrostatic bearing body and a hot jacket sleeved on the outer ring of the hydrostatic bearing body; the upper guide rail and the lower guide rail are coaxially and fixedly connected up and down; the hydrostatic bearing body is coaxially and fixedly arranged at the upper end of the base,
the torque motor stator is arranged in an inner hole at the lower end of the base and is fixedly connected with the base through a fixed seat arranged at the lower end of the base; the torque motor rotor is coaxially and fixedly connected with the transmission shaft, the transmission shaft is coaxially and fixedly connected with the transmission disc, and the transmission disc is coaxially and fixedly connected with the upper guide rail; the workbench is arranged above the upper guide rail and is coaxially and fixedly connected with the upper guide rail;
an upper annular concave table and a lower annular concave table are respectively arranged in the middle of the upper end and the middle of the lower end of the hydrostatic bearing body, a plurality of fan-shaped upper pressure bearing boss areas and a plurality of fan-shaped lower pressure bearing boss areas are respectively and uniformly distributed in the upper annular concave table and the lower annular concave table along the circumferential direction, and the plurality of upper pressure bearing boss areas and the plurality of lower pressure bearing boss areas are in one-to-one correspondence in a staggered arrangement mode to form a plurality of groups of upper and lower pressure bearing feedback units; a fan-shaped upper pressure-bearing groove and a fan-shaped lower pressure-bearing groove are respectively arranged at the upper end of each upper pressure-bearing boss region and the lower end of each lower pressure-bearing boss region, an upper pressure-bearing oil cavity is formed between the upper pressure-bearing groove and the lower end surface of the upper guide rail, and a lower pressure-bearing oil cavity is formed between the lower pressure-bearing groove and the upper end surface of the lower guide rail; an upper throttling boss area and a lower throttling boss area are respectively arranged in each upper pressure-bearing groove and each lower pressure-bearing groove, an upper oil inlet groove and a lower oil inlet groove are respectively arranged in each upper throttling boss area and each lower throttling boss area, and an upper throttling back groove and a lower throttling back groove are respectively arranged on two sides of the upper oil inlet groove and two sides of the lower oil inlet groove; a group of upper feedback oil paths and a group of lower feedback oil paths are arranged in the hydrostatic bearing body corresponding to each group of pressure-bearing feedback units, the upper feedback oil paths are communicated with the lower throttling back grooves and the corresponding upper pressure-bearing grooves, and the lower feedback oil paths are connected with the upper throttling back grooves and the corresponding lower pressure-bearing grooves;
an even number of side bearing boss regions are uniformly distributed on the inner ring of the hydrostatic bearing body along the circumferential direction, and two side bearing boss regions which are opposite at an angle of 180 degrees form a group of side bearing feedback units; a side pressure-bearing groove is arranged in each side pressure-bearing boss area, a side pressure-bearing oil cavity is formed between each side pressure-bearing groove and the side surface of the lower guide rail, a side throttling boss area is arranged in each side throttling boss area, a side oil inlet groove is arranged in each side throttling boss area, and side throttling rear grooves are arranged on two sides of each side oil inlet groove; a group of left semi-ring feedback oil paths and a group of right semi-ring feedback oil paths are arranged corresponding to each group of lateral pressure-bearing feedback units, the left semi-ring feedback oil paths are communicated with a lateral throttling back groove in one side pressure-bearing boss area and a corresponding lateral pressure-bearing groove in the other side pressure-bearing boss area, and the right semi-ring feedback oil paths are communicated with a lateral throttling back groove in the other side pressure-bearing boss area and a lateral pressure-bearing groove in the one side pressure-bearing boss area;
an annular oil inlet groove is formed in the outer ring of the hydrostatic bearing body, an oil inlet interface communicated with the oil inlet groove is formed in the hot-fitting sleeve, an upper oil inlet shunt, a lower oil inlet shunt and a side oil inlet shunt are respectively arranged in the hydrostatic bearing body corresponding to an upper oil inlet groove in each upper throttling boss area, a lower oil inlet groove in each lower throttling boss area and a side oil inlet groove in each side throttling boss area, and the upper oil inlet shunt, the lower oil inlet shunt and the side oil inlet shunt are respectively communicated with the annular oil inlet groove and the corresponding oil inlet groove.
Further: the left semi-ring feedback oil path and the right semi-ring feedback oil path are respectively composed of a first radial pore passage communicated with the side throttling back groove, a second radial pore passage communicated with the corresponding side pressure-bearing groove, a first axial pore passage communicated with the first radial pore passage, a second axial pore passage communicated with the second radial pore passage and a semi-annular oil groove communicated with the first axial pore passage and the second axial pore passage, and the semi-annular oil groove is arranged on the upper end surface of the hydrostatic bearing body and/or the upper end surface of the base.
Further: a sealing cover is coaxially fixed at the upper end part of the upper guide rail; and a sealing check ring is fixedly arranged on the periphery of the upper guide rail at the upper end of the hydrostatic bearing body, the upper end part of the sealing check ring extends into the sealing cover, and 0-type sealing rings are embedded on the outer side and the inner side of the semi-annular oil groove between the lower end of the sealing check ring and the upper end of the hydrostatic bearing body.
Further: and 0-shaped sealing rings are embedded between the upper end of the base and the lower end of the hydrostatic bearing body and positioned on the inner side and the outer side of the semi-annular oil groove.
Further: an end cover is arranged at the upper end of the central hole of the workbench.
The utility model has the advantages and positive effect:
1. this accurate closed hydrostatic bearing of internal feedback radially and axially adopts the support of the accurate closed hydrostatic bearing of internal feedback, and the accurate closed hydrostatic bearing throttle structure of internal feedback and the integrated design of guide rail loading end do not have external flow controller, and the appearance is clean and tidy pleasing to the eye, and the throttle structure possesses the feedback function. The inner feedback precision closed static pressure bearing uses hydraulic pump to send high pressure oil into the bearing gap to form oil film by force, and balances the external load by the static pressure of liquid. High-pressure oil enters the pressure bearing oil cavity after being throttled, and the throttling structure is used for keeping the stability of the oil film. When the axial load is zero, the oil pressures of the pressure-bearing oil cavities are equal to each other, when the shaft system is loaded, the shaft system is axially deviated, gaps near the pressure-bearing oil cavities are different, oil films with large stress are thinned, the flow rate is reduced, therefore, the flow rate of the throttling structure passing through the part is reduced, the pressure in the throttling structure is also reduced, but the pressure of the oil pump is kept unchanged, and the pressure in all the lower pressure-bearing oil cavities is increased. In the same way, the pressure of the upper pressure-bearing oil chamber is reduced. The bearing balances weight by pressure difference, and is automatically adjusted by internal feedback when bearing changes, so that the pressure of an oil pump is not required to be adjusted, the bearing rigidity and the anti-overturning capacity of the rotary table are greatly improved, the running reliability of the rotary table is improved, and the grinding size precision of a machine tool and the surface quality of a workpiece are effectively improved when the bearing is applied to grinding equipment.
2. The utility model discloses with radial static pressure and axial static pressure integration on a hydrostatic bearing, reduced the structural accumulative total error of workstation, reduced the assembly degree of difficulty, improved the whole precision of workstation.
3. The utility model discloses an advance oil circuit and feedback oil circuit and realize by the intercommunicating pore canal of processing in the work piece, reduced external pipeline, simplified the structure, make the revolving stage reach the clean and tidy pleasing to the eye effect of appearance.
Drawings
Fig. 1 is an overall sectional view of the present invention;
FIG. 2 is a perspective view of the present invention;
fig. 3 is a schematic structural view, 3a, plan view, of the hydrostatic bearing body of the present invention; 3b, a perspective view of fig. 1; 3c, perspective view 2;
fig. 4 is a schematic structural view of the base of the present invention;
fig. 5 is a schematic diagram of the inner feedback closed hydrostatic bearing of the utility model 4.
Detailed Description
The present invention will be described in further detail with reference to the following specific embodiments, which are illustrative only and not limiting, and the scope of the present invention should not be limited thereby.
An internal feedback precision closed static pressure turntable is shown in fig. 1-4, and the invention point is as follows: the device comprises a base 11, an internal feedback type hydrostatic bearing, a workbench 1, a torque motor stator 13, a torque motor rotor 12, a transmission shaft 7 and a transmission disc 5.
The inner feedback type hydrostatic bearing is composed of an upper guide rail 2, a lower guide rail 4, a hydrostatic bearing body 3 and a hot-fitting sleeve 10 sleeved on the outer ring of the hydrostatic bearing body. The upper guide rail and the lower guide rail are coaxially and fixedly connected up and down through screws; the hydrostatic bearing body is coaxially and fixedly arranged at the upper end of the base through a screw.
The torque motor stator is arranged in an inner hole at the lower end of the base and is fixedly connected with the base through a fixed seat 14 arranged at the lower end of the base. The torque motor rotor is coaxially and fixedly connected with the transmission shaft, the transmission shaft is coaxially and fixedly connected with the transmission disc through screws, and the transmission disc is coaxially and fixedly connected with the upper guide rail through screws and other connection modes; the workbench is arranged above the upper guide rail and is coaxially and fixedly connected with the upper guide rail through screws.
An upper annular concave table 3.1 and a lower annular concave table 3.12 are respectively arranged in the middle of the upper end and the middle of the lower end of the hydrostatic bearing body, a plurality of fan-shaped upper pressure-bearing boss areas 3.2 and a plurality of fan-shaped lower pressure-bearing boss areas 3.13 are respectively and uniformly distributed in the upper annular concave table and the lower annular concave table along the circumferential direction, and the plurality of upper pressure-bearing boss areas and the plurality of lower pressure-bearing boss areas are in one-to-one correspondence in a staggered arrangement mode to form a plurality of groups of upper and lower pressure-bearing feedback units; a fan-shaped upper pressure-bearing groove 3.3 and a fan-shaped lower pressure-bearing groove 3.14 are respectively arranged at the upper end of each upper pressure-bearing boss region and the lower end of each lower pressure-bearing boss region, an upper pressure-bearing oil cavity is formed between the upper pressure-bearing groove and the lower end surface of the upper guide rail, and a lower pressure-bearing oil cavity is formed between the lower pressure-bearing groove and the upper end surface of the lower guide rail; an upper throttling boss area 3.4 and a lower throttling boss area 3.15 are respectively arranged in each upper pressure-bearing groove and each lower pressure-bearing groove, an upper oil inlet groove 3.5 and a lower oil inlet groove 3.16 are respectively arranged in each upper throttling boss area and each lower throttling boss area, and an upper throttling rear groove 3.6 and a lower throttling rear groove 3.17 are respectively arranged on two sides of the upper oil inlet groove and two sides of the lower oil inlet groove. A group of upper feedback oil paths and a group of lower feedback oil paths are arranged in the hydrostatic bearing body corresponding to each group of pressure-bearing feedback units, the upper feedback oil paths are communicated with the lower throttling back grooves and the corresponding upper pressure-bearing grooves, and the lower feedback oil paths are connected with the upper throttling back grooves and the corresponding lower pressure-bearing grooves. Through the reasonable arrangement of the staggered angle positions of the upper pressure bearing boss region and the corresponding lower pressure bearing boss region, the upper feedback oil path and the lower feedback oil path can directly realize the communication between the throttling back groove and the pressure bearing groove by adopting a pore channel along the axial direction.
An even number of side bearing boss areas 3.7 are uniformly distributed on the inner ring of the hydrostatic bearing body along the circumferential direction, and two 180-degree opposite side bearing boss areas form a group of side bearing feedback units. And a side pressure bearing groove 3.8 is arranged in each side pressure bearing boss area, and a side pressure bearing oil cavity is formed between the side pressure bearing groove and the side surface of the lower guide rail. A side throttling boss area 3.9 is arranged in the side pressure-bearing groove, a side oil inlet groove 3.10 is arranged in each side throttling boss area, and side throttling rear grooves 3.11 are arranged on two sides of each side oil inlet groove. And each lateral pressure-bearing feedback unit is provided with a group of left semi-ring feedback oil paths and a group of right semi-ring feedback oil paths, the left semi-ring feedback oil paths are communicated with a lateral throttling rear groove in one lateral pressure-bearing boss region and a corresponding lateral pressure-bearing groove in the other lateral pressure-bearing boss region, and the right semi-ring feedback oil paths are communicated with a lateral throttling rear groove in the other lateral pressure-bearing boss region and a lateral pressure-bearing groove in one lateral pressure-bearing boss region.
The upper pressure-bearing oil cavity, the lower pressure-bearing oil cavity and the side pressure-bearing oil cavity respectively play roles of upper pressure-bearing, lower pressure-bearing and side pressure-bearing, and the upper pressure-bearing region, the lower pressure-bearing region and the side pressure-bearing region are peripheral regions which are positioned in the throttling boss region in the corresponding pressure-bearing grooves.
An annular oil inlet groove 3.18 is formed in the outer ring of the hydrostatic bearing body, an oil inlet port 10.1 communicated with the oil inlet groove is formed in the hot-assembling sleeve, and a side pressure-bearing oil cavity is formed between the side pressure-bearing groove and the side face of the lower guide rail. An upper oil inlet shunt, a lower oil inlet shunt and a side oil inlet shunt are respectively arranged in the hydrostatic bearing body corresponding to the upper oil inlet groove in each upper throttling boss area, the lower oil inlet groove in each lower throttling boss area and the side oil inlet groove in each side throttling boss area, and the upper oil inlet shunt, the lower oil inlet shunt and the oil side oil inlet shunt are respectively communicated with the annular oil inlet groove and the corresponding oil inlet groove. Specifically, the upper oil inlet branch passage is composed of a radial pore passage and a vertical upward extending pore passage communicated with the radial pore passage; the lower oil inlet branch is composed of a radial pore passage and a vertical downward extending pore passage communicated with the radial pore passage; the side oil inlet branch adopts a straight-through radial pore passage.
In the above structure, further: the left half-ring feedback oil path and the right half-ring feedback oil path are respectively composed of a first radial pore passage communicated with the side throttling back groove, a second radial pore passage communicated with the corresponding side pressure-bearing groove, a first axial pore passage communicated with the first radial pore passage, a second axial pore passage communicated with the second radial pore passage and a semi-ring-shaped oil groove communicated with the first axial pore passage and the second axial pore passage, wherein the semi-ring-shaped oil groove is arranged on the upper end surface of the hydrostatic bearing body and/or on the upper end surface of the base, for example, the semi-ring-shaped oil groove 3.20 arranged on the upper end surface of the hydrostatic bearing body in the attached drawing 3a and the semi-ring-shaped oil groove 11.1 arranged on the upper end surface. Specifically, under the less condition of quantity in side pressure-bearing boss district, for example four, can all set up the semicircular oil groove on hydrostatic bearing body up end or all set up on the up end of base, and under the more condition of quantity in side pressure-bearing boss district, for example six or more, can distribute the semicircular oil groove on hydrostatic bearing body up end and on the up end of base, partly walk the semicircular oil groove that is located upper portion, another part walks the semicircular oil groove that is located the lower part to realize the rational arrangement of oil circuit.
In the above structure, further: a sealing cover 8 is coaxially fixed at the upper end part of the upper guide rail; and a sealing check ring 9 is fixedly arranged at the periphery of the upper guide rail at the upper end of the hydrostatic bearing body, and the upper end part of the sealing check ring extends into the sealing cover. Set up sealed lid and the effect that sealing ring played and be: and the cutting fluid is prevented from entering the inner part of the inner feedback closed hydrostatic bearing. And 0-type sealing rings are embedded between the lower end of the sealing check ring and the upper end of the hydrostatic bearing body and positioned on the outer side and the inner side of the semi-annular oil groove. The functions are as follows: preventing lateral oil leakage. Specifically, a circle of annular groove 3.21 can be respectively arranged at the outer side and the inner side of the semi-annular oil groove at the upper end of the hydrostatic bearing body, and an O-shaped sealing ring is respectively arranged in the two annular grooves.
In the above structure, further: and 0-shaped sealing rings are embedded between the upper end of the base and the lower end of the hydrostatic bearing body and positioned on the inner side and the outer side of the semi-annular oil groove. The functions are as follows: preventing lateral oil leakage. Specifically, a circle of annular groove 11.2 can be respectively arranged on the inner side and the outer side of the semi-annular oil groove at the upper end of the base, and an O-shaped sealing ring is arranged in each annular groove.
In the above structure, further: an end cover 6 is arranged at the upper end of the center hole of the workbench to play a role in sealing.
This accurate closed static pressure revolving stage of internal feedback, except that above-mentioned utility model point, be provided with oil return through-hole 3.19 along the circumferencial direction equipartition at hydrostatic bearing originally, annular concave station and annular boss down on the oil return through-hole intercommunication, the oil return flows into the inner chamber hole of base through the fit clearance between base and the lower rail to discharge through the oil return opening 11.3 with inner chamber hole intercommunication, realize the recovery of fluid, avoid environmental pollution.
The working principle of the internal feedback type hydrostatic bearing is shown in the figure 5:
the structure form of the internal feedback closed static pressure is a novel static pressure structure form, and is a novel special structure form of constant-pressure oil supply, built-in throttling structure and gap throttling. The principle of the hydraulic oil static pressure structure is that one path of hydraulic oil enters the lower pressure-bearing oil cavity after being throttled by the throttling structure in the upper pressure-bearing oil cavity, and the other path of hydraulic oil enters the upper pressure-bearing oil cavity after being throttled by the throttling structure in the lower pressure-bearing oil cavity, so that an axial closed static pressure structure is formed. In a no-load state, a gap h0 is formed between the upper pressure-bearing oil cavity and the guide rail, a gap h0 is formed between the lower pressure-bearing oil cavity and the guide rail, one path of hydraulic oil flows into the opposite side pressure-bearing oil cavity through a throttling structure in the side pressure-bearing oil cavity, the other path of hydraulic oil flows into the side pressure-bearing oil cavity through a throttling structure in the opposite side pressure-bearing oil cavity, a radial closed static pressure structure is formed, and a stable working state is achieved. When the guide rail is subjected to the down force F, a gap variation value Δ h is generated. Meanwhile, the pressure in the oil cavity is reduced due to the increase of the clearance value (increased to h0+ delta h) of the upper pressure-bearing oil cavity, and meanwhile, the pressure lost on throttling is increased due to the reduction of the clearance value (reduced to h 0-delta h) of the throttling structure (used for controlling the hydraulic oil of the upper pressure-bearing oil cavity) in the lower pressure-bearing oil cavity, so that the pressure entering the upper pressure-bearing oil cavity is reduced, and the feedback effect is realized; similarly, the pressure in the oil chamber is increased due to the decrease of the gap value (decreased to h 0-delta h) of the lower pressure-bearing oil chamber, and meanwhile, the pressure lost on throttling is reduced due to the increase of the gap (increased to h0+ delta h) of the throttling structure (used for controlling the hydraulic oil in the lower pressure-bearing oil chamber) in the upper pressure-bearing oil chamber, so that the pressure entering the lower pressure-bearing oil chamber is increased, and the feedback effect is realized. Feedback in the radial direction is referred to the above feedback principle in the circumferential direction.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (5)
1. The utility model provides an accurate closed static pressure revolving stage of internal feedback which characterized in that: the device comprises a base, an internal feedback type hydrostatic bearing, a workbench, a torque motor stator, a torque motor rotor, a transmission shaft and a transmission disc;
the inner feedback type hydrostatic bearing comprises an upper guide rail, a lower guide rail, a hydrostatic bearing body and a hot jacket sleeved on the outer ring of the hydrostatic bearing body; the upper guide rail and the lower guide rail are coaxially and fixedly connected up and down; the hydrostatic bearing body is coaxially and fixedly arranged at the upper end of the base,
the torque motor stator is arranged in an inner hole at the lower end of the base and is fixedly connected with the base through a fixed seat arranged at the lower end of the base; the torque motor rotor is coaxially and fixedly connected with the transmission shaft, the transmission shaft is coaxially and fixedly connected with the transmission disc, and the transmission disc is coaxially and fixedly connected with the upper guide rail; the workbench is arranged above the upper guide rail and is coaxially and fixedly connected with the upper guide rail;
an upper annular concave table and a lower annular concave table are respectively arranged in the middle of the upper end and the middle of the lower end of the hydrostatic bearing body, a plurality of fan-shaped upper pressure bearing boss areas and a plurality of fan-shaped lower pressure bearing boss areas are respectively and uniformly distributed in the upper annular concave table and the lower annular concave table along the circumferential direction, and the plurality of upper pressure bearing boss areas and the plurality of lower pressure bearing boss areas are in one-to-one correspondence in a staggered arrangement mode to form a plurality of groups of upper and lower pressure bearing feedback units; a fan-shaped upper pressure-bearing groove and a fan-shaped lower pressure-bearing groove are respectively arranged at the upper end of each upper pressure-bearing boss region and the lower end of each lower pressure-bearing boss region, an upper pressure-bearing oil cavity is formed between the upper pressure-bearing groove and the lower end surface of the upper guide rail, and a lower pressure-bearing oil cavity is formed between the lower pressure-bearing groove and the upper end surface of the lower guide rail; an upper throttling boss area and a lower throttling boss area are respectively arranged in each upper pressure-bearing groove and each lower pressure-bearing groove, an upper oil inlet groove and a lower oil inlet groove are respectively arranged in each upper throttling boss area and each lower throttling boss area, and an upper throttling back groove and a lower throttling back groove are respectively arranged on two sides of the upper oil inlet groove and two sides of the lower oil inlet groove; a group of upper feedback oil paths and a group of lower feedback oil paths are arranged in the hydrostatic bearing body corresponding to each group of pressure-bearing feedback units, the upper feedback oil paths are communicated with the lower throttling back grooves and the corresponding upper pressure-bearing grooves, and the lower feedback oil paths are connected with the upper throttling back grooves and the corresponding lower pressure-bearing grooves;
an even number of side bearing boss regions are uniformly distributed on the inner ring of the hydrostatic bearing body along the circumferential direction, and two side bearing boss regions which are opposite at an angle of 180 degrees form a group of side bearing feedback units; a side pressure-bearing groove is arranged in each side pressure-bearing boss area, a side pressure-bearing oil cavity is formed between each side pressure-bearing groove and the side surface of the lower guide rail, a side throttling boss area is arranged in each side throttling boss area, a side oil inlet groove is arranged in each side throttling boss area, and side throttling rear grooves are arranged on two sides of each side oil inlet groove; a group of left semi-ring feedback oil paths and a group of right semi-ring feedback oil paths are arranged corresponding to each group of lateral pressure-bearing feedback units, the left semi-ring feedback oil paths are communicated with a lateral throttling back groove in one side pressure-bearing boss area and a corresponding lateral pressure-bearing groove in the other side pressure-bearing boss area, and the right semi-ring feedback oil paths are communicated with a lateral throttling back groove in the other side pressure-bearing boss area and a lateral pressure-bearing groove in the one side pressure-bearing boss area;
an annular oil inlet groove is formed in the outer ring of the hydrostatic bearing body, an oil inlet interface communicated with the oil inlet groove is formed in the hot-fitting sleeve, an upper oil inlet shunt, a lower oil inlet shunt and a side oil inlet shunt are respectively arranged in the hydrostatic bearing body corresponding to an upper oil inlet groove in each upper throttling boss area, a lower oil inlet groove in each lower throttling boss area and a side oil inlet groove in each side throttling boss area, and the upper oil inlet shunt, the lower oil inlet shunt and the side oil inlet shunt are respectively communicated with the annular oil inlet groove and the corresponding oil inlet groove.
2. The internal feedback precision closed hydrostatic turret of claim 1, wherein: the left semi-ring feedback oil path and the right semi-ring feedback oil path are respectively composed of a first radial pore passage communicated with the side throttling back groove, a second radial pore passage communicated with the corresponding side pressure-bearing groove, a first axial pore passage communicated with the first radial pore passage, a second axial pore passage communicated with the second radial pore passage and a semi-annular oil groove communicated with the first axial pore passage and the second axial pore passage, and the semi-annular oil groove is arranged on the upper end surface of the hydrostatic bearing body and/or the upper end surface of the base.
3. The internal feedback precision closed hydrostatic turret of claim 2, wherein: a sealing cover is coaxially fixed at the upper end part of the upper guide rail; and a sealing check ring is fixedly arranged on the periphery of the upper guide rail at the upper end of the hydrostatic bearing body, the upper end part of the sealing check ring extends into the sealing cover, and 0-type sealing rings are embedded on the outer side and the inner side of the semi-annular oil groove between the lower end of the sealing check ring and the upper end of the hydrostatic bearing body.
4. The internal feedback precision closed hydrostatic turret of claim 2, wherein: and 0-shaped sealing rings are embedded between the upper end of the base and the lower end of the hydrostatic bearing body and positioned on the inner side and the outer side of the semi-annular oil groove.
5. The internal feedback precision closed hydrostatic turret of claim 1, wherein: an end cover is arranged at the upper end of the central hole of the workbench.
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| CN202021828430.XU CN213004624U (en) | 2020-08-27 | 2020-08-27 | Internal feedback precise closed static pressure rotary table |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112123199A (en) * | 2020-08-27 | 2020-12-25 | 森合(天津)科技有限公司 | Internal feedback precise closed static pressure rotary table |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112123199A (en) * | 2020-08-27 | 2020-12-25 | 森合(天津)科技有限公司 | Internal feedback precise closed static pressure rotary table |
| CN112123199B (en) * | 2020-08-27 | 2022-07-26 | 森合(天津)科技有限公司 | Internal feedback precise closed static pressure rotary table |
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