CN217493651U - Static pressure sand brick main shaft - Google Patents

Abstract

The utility model provides a static pressure sand brick main shaft, including the protecgulum, back lid and sleeve, the protecgulum, back lid and two telescopic terminal surface fixed connection, the protecgulum, back lid and telescopic inside form sealed work cavity, work cavity's inside is equipped with hydrostatic bearing and thrust plate, hydrostatic bearing and thrust plate fixed connection, hydrostatic bearing's inside is equipped with the static pressure main shaft, the static pressure main shaft runs through the protecgulum, back lid and thrust plate, the static pressure main shaft passes through sealing washer sealing connection with the protecgulum, the static pressure main shaft passes through sealing washer sealing connection with the back lid, the front end of static pressure main shaft is fixed and is equipped with anchor clamps, telescopic side is equipped with inlet port and oil outlet respectively, inlet port and oil outlet are linked together with work cavity respectively. Bearing oil films are formed on the upper end surface and the lower end surface of the hydrostatic bearing and the inner surface and the outer surface of the hydrostatic bearing, abrasion in the using process is reduced, the hydrostatic spindle has high rotation precision, radial run-out and axial movement of the hydrostatic spindle are guaranteed to meet precision requirements, and machining precision is improved.

Description

Static pressure sand brick main shaft

Technical Field

The utility model relates to a static pressure main shaft technical field especially relates to a static pressure sand brick main shaft.

Background

The vertical shaft surface grinder is a high-efficiency, precise and stable machining machine tool for grinding the end face of a sand brick tile. The spindle device of the conventional vertical shaft surface grinding machine usually uses a rolling bearing, and the rolling bearing plays a role of positioning and supporting the spindle and ensures the precision of the spindle device. The rolling bearing has the defects of poor vibration damping capacity, low service life at high speed and large sound. Particularly, in the using process, certain abrasion can occur between the main shaft and the rolling bearing, and a certain gap is generated between the main shaft and the rolling bearing, so that the main shaft generates radial runout during rotation, the precision of the main shaft device is reduced, and the machining precision of parts is reduced finally.

SUMMERY OF THE UTILITY MODEL

The utility model discloses main shaft device to traditional vertical scroll flat grinder uses antifriction bearing, there is certain wearing and tearing in the use, lead to the technical problem that the machining precision descends, a static pressure sand brick main shaft is provided, the device all forms the bearing oil film at static pressure bearing's upper and lower terminal surface and static pressure bearing's interior outer surface, reduce the wearing and tearing in the use, make the static pressure main shaft have very high rotation accuracy, guarantee the radial runout of static pressure main shaft, the axial float satisfies the required precision, the machining precision has been improved.

Therefore, the technical scheme of the utility model is that, a static pressure sand brick main shaft, including protecgulum, back lid and sleeve, protecgulum, back lid and telescopic two terminal surface fixed connection, the inside sealed work cavity that forms of protecgulum, back lid and sleeve, the inside of work cavity is equipped with hydrostatic bearing and thrust plate, hydrostatic bearing and thrust plate fixed connection, the inside of hydrostatic bearing is equipped with the static pressure main shaft, the static pressure main shaft runs through protecgulum, back lid and thrust plate, hydrostatic main shaft and protecgulum pass through sealing washer sealing connection, hydrostatic main shaft and back lid pass through sealing washer sealing connection, the front end of hydrostatic main shaft is fixed and is equipped with anchor clamps, the side of sleeve is equipped with inlet port and oil outlet respectively, inlet port and oil outlet are linked together with the work cavity respectively;

the upper end surface of the hydrostatic bearing is provided with upper end oil chambers which are mutually spaced, the lower end surface of the hydrostatic bearing is provided with lower end oil chambers which are mutually spaced, the lower end oil chambers correspond to the upper end oil chambers one by one, end surface spaces are arranged between the adjacent upper end oil chambers, a first radial oil hole which penetrates through the inner part of each end surface space is arranged, the first radial oil hole is communicated with the upper end surface and the lower end surface of the hydrostatic bearing, a second radial oil hole is arranged in the upper end oil chamber, and a third radial oil hole is arranged in the lower end oil chamber;

the inner surface of the hydrostatic bearing is provided with spaced middle oil chambers, inner surface intervals are arranged between adjacent middle oil chambers, a first transverse oil hole is arranged inside the middle oil chamber and is communicated with the inner surface and the outer surface of the hydrostatic bearing, a second transverse oil hole and a third transverse oil hole are respectively arranged on the left side and the right side of the first transverse oil hole, the second transverse oil hole is communicated with the upper end oil chamber through a second radial oil hole, the third transverse oil hole is communicated with the lower end oil chamber through a third radial oil hole, the outer surface of the hydrostatic bearing is provided with an annular oil groove and a radial oil groove, and the annular oil groove and the radial oil groove are communicated.

Preferably, the clearance between the inner surface interval of the hydrostatic bearing and the hydrostatic spindle is 0.04-0.05 mm.

Preferably, the depths of the upper end oil chamber and the lower end oil chamber are 0.2-0.5 mm.

Preferably, the number of the upper end oil chamber and the lower end oil chamber is plural.

Preferably, the number of the upper end oil chambers and the lower end oil chambers is 4.

Preferably, the depth of the middle oil chamber is 0.2-0.5 mm.

Preferably, the number of the middle oil chambers is plural.

Preferably, the number of middle oil chambers is 4.

The beneficial effects of the utility model are that, up end and lower terminal surface through first radial oilhole intercommunication hydrostatic bearing, internal surface and surface through first horizontal oilhole intercommunication hydrostatic bearing, with the clearance size design between hydrostatic bearing's internal surface interval and the hydrostatic spindle of 0.04-0.05mm, all form the oil film that bears at hydrostatic bearing's upper and lower terminal surface and hydrostatic bearing's interior outer surface, reduce the wearing and tearing in the use, make the hydrostatic spindle have very high rotation accuracy, guarantee the runout of hydrostatic spindle, the axial float satisfies the required precision, the machining precision has been improved.

The hydrostatic bearing is characterized in that the hydrostatic bearing is communicated with an upper end oil chamber through a second transverse oil hole and a second radial oil hole, and is communicated with a lower end oil chamber through a third transverse oil hole and a third radial oil hole, the depths of the upper end oil chamber and the lower end oil chamber are set to be 0.2-0.5mm, the inner surface and the outer surface of the hydrostatic bearing are communicated through the first transverse oil hole, the depth of the middle oil chamber is set to be 0.2-0.5mm, an annular oil groove and a radial oil groove are arranged on the outer surface of the hydrostatic bearing, the pressure uniformity of bearing oil films on the upper end surface, the lower end surface and the inner surface and the outer surface of the hydrostatic bearing is further guaranteed, the smoothness of oil supply is guaranteed through an oil passage of multiple loops, the stability and consistency of oil pressure in a working chamber are guaranteed, the rotating precision of the hydrostatic spindle is improved, the processing precision is further improved, and the service life of the hydrostatic spindle is prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of a hydrostatic bearing;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken at B-B of FIG. 3;

FIG. 5 is a cross-sectional view taken at C-C of FIG. 4;

FIG. 6 is a cross-sectional view taken at D-D of FIG. 4;

fig. 7 is a cross-sectional view at E-E in fig. 4.

The symbols in the drawings illustrate that:

1. a front cover; 2. a rear cover; 3. a sleeve; 4. a hydrostatic bearing; 401. an upper end oil chamber; 402. a lower end oil chamber; 403. a middle oil chamber; 404. a first radial oil hole; 405. a second radial oil hole; 406. a first lateral oil hole; 407. a second lateral oil hole; 408. a third transverse oil hole; 409. a third radial oil hole; 410. an annular oil groove; 411. a radial oil groove; 412. a bolt fixing hole; 413. the inner surfaces are spaced; 5. static pressure main shaft; 6. a clamp; 7. an oil inlet hole; 8. an oil outlet hole; 9. a seal ring; 10. a thrust plate.

Detailed Description

The present invention will be further described with reference to the following examples.

Fig. 1-7 show an embodiment of a static pressure sand brick main shaft according to the present invention, which comprises a front cover 1, a rear cover 2 and a sleeve 3, wherein the front cover 1, the rear cover 2 and the sleeve 3 are fixedly connected at two end faces, the front cover 1, the inside of back lid 2 and sleeve 3 forms sealed work cavity, the inside of work cavity is equipped with hydrostatic bearing 4 and thrust plate 10, hydrostatic bearing 4 passes through the inside bolt and thrust plate 10 fixed connection of bolt fixed orifices 412, the inside of hydrostatic bearing 4 is equipped with hydrostatic spindle 5, hydrostatic spindle 5 runs through protecgulum 1, back lid 2 and thrust plate 10, hydrostatic spindle 5 passes through sealing washer 9 sealing connection with protecgulum 1, hydrostatic spindle 5 passes through sealing washer 9 sealing connection with back lid 2, the front end of hydrostatic spindle 5 is fixed and is equipped with anchor clamps 6, the side of sleeve 3 is equipped with inlet port 7 and oil outlet 8 respectively, inlet port 7 and oil outlet 8 are linked together with the work cavity respectively.

The up end of hydrostatic bearing 4 is equipped with the upper end oil chamber 401 of mutual spaced, the quantity of upper end oil chamber 401 is a plurality of, the lower terminal surface of hydrostatic bearing 4 is equipped with the lower extreme oil chamber 402 of mutual spaced, the quantity of lower extreme oil chamber 402 is a plurality of, lower extreme oil chamber 402 and upper end oil chamber 401 one-to-one, be equipped with the terminal surface interval between the adjacent upper end oil chamber 401, terminal surface interval's inside is equipped with the first radial oilhole 404 that runs through, first radial oilhole 404 intercommunication hydrostatic bearing 4's up end and lower terminal surface, the inside of upper end oil chamber 401 is equipped with the radial oilhole of second 405, the inside of lower extreme oil chamber 402 is equipped with the radial oilhole of third 409.

The inner surface of the static pressure bearing 4 is provided with middle oil chambers 403 at intervals, an inner surface interval 413 is arranged between the adjacent middle oil chambers 403, the gap between the inner surface interval 413 of the static pressure bearing 4 and the static pressure spindle 5 is 0.04-0.05mm, a first transverse oil hole 406 is arranged inside the middle oil chamber 403, the first transverse oil hole 406 is communicated with the inner surface and the outer surface of the static pressure bearing 4, the left side and the right side of the first transverse oil hole 406 are respectively provided with a second transverse oil hole 407 and a third transverse oil hole 408, the second transverse oil hole 407 is communicated with the upper end oil chamber 401 through a second radial oil hole 405, the third transverse oil hole 408 is communicated with the lower end oil chamber 402 through a third radial oil hole 409, the outer surface of the static pressure bearing 4 is provided with an annular oil groove 410 and a radial oil groove 411, and the annular oil groove 410 is communicated with the radial oil groove 411.

In one embodiment, the depth of the upper end oil chamber 401 and the lower end oil chamber 402 is 0.2-0.5mm, and the number of the upper end oil chamber 401 and the lower end oil chamber 402 is plural, and preferably, the number of the upper end oil chamber 401 and the lower end oil chamber 402 is 4.

In one embodiment, the depth of the middle oil chamber 403 is 0.2-0.5mm, and the number of the middle oil chambers 403 is plural, and preferably, the number of the middle oil chambers 403 is 4.

The utility model discloses a first radial oilhole 404 intercommunication hydrostatic bearing 4's up end and lower terminal surface, internal surface and surface through first horizontal oilhole 406 intercommunication hydrostatic bearing 4, with the internal surface interval of hydrostatic bearing 4 and the clearance size design between hydrostatic bearing 5 for 0.04-0.05mm, all form the oil film that bears at hydrostatic bearing 4's upper and lower terminal surface and hydrostatic bearing 4's internal and external surface, reduce the wearing and tearing in the use, make hydrostatic bearing 5 have very high rotation accuracy, guarantee hydrostatic bearing 5's runout, the axial float satisfies the required precision, the machining precision has been improved.

The utility model is communicated with the upper end oil chamber 401 through the second transverse oil hole 407 and the second radial oil hole 405, the third transverse oil hole 408 and the third radial oil hole 409 are communicated with the lower end oil chamber 402, the depths of the upper end oil chamber 401 and the lower end oil chamber 402 are set to be 0.2-0.5mm, the inner surface and the outer surface of the hydrostatic bearing 4 are communicated through the first transverse oil hole 406, the depth of the middle oil chamber 403 is set to 0.2-0.5mm, and the outer surface of the hydrostatic bearing 4 is provided with an annular oil groove 410 and a radial oil groove 411, so that the pressure uniformity of oil film bearing on the upper and lower end surfaces and the inner and outer surfaces of the hydrostatic bearing 4 is further ensured, through the oil passage of multiloop, guarantee the smooth and easy of fuel feeding, guarantee that the oil pressure in the working chamber is stable unanimous, improve the rotatory precision of static pressure main shaft, further improved the precision of processing, improved the life of static pressure main shaft.

However, the above description is only for the specific embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims (8)

1. A static pressure sand brick main shaft is characterized by comprising a front cover, a rear cover and a sleeve, wherein the front cover and the rear cover are fixedly connected with two end faces of the sleeve, a sealed working cavity is formed inside the front cover, the rear cover and the sleeve, a static pressure bearing and a thrust plate are arranged inside the working cavity, the static pressure bearing is fixedly connected with the thrust plate, a static pressure main shaft is arranged inside the static pressure bearing, the static pressure main shaft penetrates through the front cover, the rear cover and the thrust plate, the static pressure main shaft is connected with the front cover in a sealing mode through a sealing ring, the static pressure main shaft is connected with the rear cover in a sealing mode through a sealing ring, a clamp is fixedly arranged at the front end of the static pressure main shaft, an oil inlet and an oil outlet are formed in the side face of the sleeve respectively, and the oil inlet and the oil outlet are communicated with the working cavity respectively;

the upper end surface of the hydrostatic bearing is provided with upper end oil chambers which are mutually spaced, the lower end surface of the hydrostatic bearing is provided with lower end oil chambers which are mutually spaced, the lower end oil chambers and the upper end oil chambers are in one-to-one correspondence, end surface spaces are arranged between the adjacent upper end oil chambers, first radial oil holes which penetrate through the end surface spaces are arranged in the end surface spaces, the first radial oil holes are communicated with the upper end surface and the lower end surface of the hydrostatic bearing, second radial oil holes are arranged in the upper end oil chambers, and third radial oil holes are arranged in the lower end oil chambers;

the hydrostatic bearing comprises a hydrostatic bearing body, a first transverse oil hole, a second transverse oil hole, a third transverse oil hole, an annular oil groove and a radial oil groove, wherein the inner surface of the hydrostatic bearing body is provided with the middle oil chambers at intervals, the adjacent middle oil chambers are provided with inner surface intervals, the inside of the middle oil chamber is provided with the first transverse oil hole, the first transverse oil hole is communicated with the inner surface and the outer surface of the hydrostatic bearing body, the left side and the right side of the first transverse oil hole are respectively provided with the second transverse oil hole and the third transverse oil hole, the second transverse oil hole is communicated with an upper-end oil chamber through the second radial oil hole, the third transverse oil hole is communicated with a lower-end oil chamber through the third radial oil hole, and the outer surface of the hydrostatic bearing body is provided with the annular oil groove and the radial oil groove.

2. The hydrostatic sand brick spindle of claim 1, wherein the clearance between the inner surface space of the hydrostatic bearing and the hydrostatic spindle is 0.04-0.05 mm.

3. The main shaft of a static pressure sand brick as claimed in claim 1, characterized in that the depth of the upper end oil chamber and the lower end oil chamber is 0.2-0.5 mm.

4. The main shaft of claim 3, wherein the number of the upper end oil chamber and the lower end oil chamber is plural.

5. The hydrostatic sand brick spindle of claim 4 wherein the number of upper and lower oil chambers is 4.

6. The main shaft of a hydrostatic sand brick as claimed in claim 1, wherein the depth of the middle oil chamber is 0.2-0.5 mm.

7. The hydrostatic sand brick spindle of claim 6 wherein the number of said central oil chambers is plural.

8. A hydrostatic sand brick spindle according to claim 7, wherein the number of said central oil chambers is 4.

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