Closed static pressure center frame
The closed hydrostatic center frame solves the problems of insufficient rigidity and large footprint of existing center frames by using hydrostatic floating and hydraulic cylinders to clamp large long shaft workpieces, thus achieving high-precision machining and a small footprint.
Patent Information
- Application Number
- CN202520071104.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-13
AI Technical Summary
The existing center frame clamping structure for large, long shaft workpieces lacks rigidity, cannot guarantee machining accuracy, occupies a large area, and cannot be adjusted to accommodate workpieces of different lengths.
A closed hydrostatic center frame is adopted, and large long shaft workpieces are clamped by two sets of devices. The workpiece is clamped by V-shaped irons driven by hydrostatic floating and hydraulic cylinders. Combined with the flipping structure and adjusting wedges, the workpiece is ensured to be in the same center position, reducing the floor space.
It effectively ensures machining accuracy, reduces the footprint of the equipment, and can adapt to workpieces of different lengths, ensuring that the center position of the bearing remains unchanged during the machining process.
Smart Images
Figure CN223670691U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a closed static pressure center stand and belongs to the mechanical technical field. BACKGROUND
[0002] Large long shaft workpieces used on large motors need to be milled to form rotor grooves, and some existing center clamps for large long shaft workpieces are clamped by hydraulic swing arm structures, which have poor rigidity and affect the milling effect of the rotor grooves; some center clamps are clamped by large long shaft workpieces through two side screws, which are large split structures, have high manufacturing costs and large floor areas, and cannot be adjusted to effectively ensure that the two ends of the large long shaft workpiece are in the same center position, affecting the machining precision. SUMMARY
[0003] To overcome the deficiencies of the prior art, the utility model provides a closed static pressure center clamp, which clamps large long shaft workpieces by two sets of the device, effectively ensures that the bearing center position remains unchanged during rotor milling, rotates the large long shaft workpiece by static pressure float, rotates the workpiece to the required angle on the oil film formed between the large long shaft workpiece and the static pressure tile, clamps the workpiece by the V-shaped iron driven by the hydraulic oil cylinder on the upper support of the turnover structure, and ensures the rigidity and machining precision of clamping and reduces the floor area of the device.
[0004] The utility model solves the technical problems by adopting the following technical scheme: a closed static pressure center clamp, which comprises a support I, a support II, a support A, a support B, a support III, a support IV, a static pressure tile carrier and an upper support, the support II is slidably installed on the top of the support I, the support A and the support B are respectively installed on the two sides of the support I, and the top of the support A and the support B is provided with a cover plate; one cycloidal pin wheel speed reducer is installed on one side of the z-axis main shaft direction of the support I, the cycloidal pin wheel speed reducer is located in the support B, a set of intermeshing worm a and worm wheel a are installed in the support I, the worm a is fixed with the driving end of the cycloidal pin wheel speed reducer, and a coaxial gear a is installed below the worm wheel a.
[0005] The top of the support II side is provided with a protruding installation groove, and a fixed seat is arranged on the support II at the side of the installation groove; a semicircular static pressure tile bracket is installed in the installation groove, and a static pressure tile is embedded in the static pressure tile bracket; the inside of the static pressure tile bracket below the static pressure tile is a static pressure oil cavity; a capillary damper is installed on the outside of the installation groove in the z-axis direction of the support I, the capillary damper communicates with the inside static pressure oil cavity of the static pressure tile bracket, and the inside static pressure oil cavity of the static pressure tile bracket is also connected with an oil return pipe; the vertical support III is installed on the support I and fixed with one side of the installation groove, and the vertical support IV is installed on the fixed seat and fixed with the other side of the installation groove; a horizontal shaft I is installed in the upper end of the support III, and a vertical shaft II is fixed at the center of the shaft I.
[0006] An upper support overturning motor is installed at the upper position of the support IV side, a worm b is installed in the support IV, and the driving end of the upper support overturning motor is fixed with the worm b; an axis III is installed in the support IV above the worm b, the axis III and the worm b are arranged in a cross shape, a worm wheel b and a large straight gear are installed on the axis III, and the worm wheel b is engaged with the worm b; an axis IV same as the axis III is installed in the support IV above the axis III, and the axis IV is installed with a gear b engaged with the large straight gear.
[0007] The horizontal upper support is installed on the support III and the support IV, one side of the upper support is fixedly connected with both ends of the axis IV, the other side of the upper support is connected with the axis II in cooperation and fixed by a nut; a hydraulic oil cylinder with a piston end downward is installed at the center of the top of the upper support, and a V-shaped iron with an opening downward is arranged at the center of the top of the upper support, and the piston end of the hydraulic oil cylinder is fixedly connected with the center of the top of the V-shaped iron.
[0008] Further, the bottom of the static pressure tile bracket is horizontally arranged, and the two sides of the bottom of the static pressure tile bracket are symmetrically and obliquely arranged.
[0009] Further, two symmetrically arranged lifting adjustment inclined irons are installed between the bottom of the static pressure tile bracket and the support I, a horizontal right and left threaded screw rod is jointly installed in the two lifting adjustment inclined irons, the top inclined surface of the lifting adjustment inclined iron is in contact with the two sides of the bottom of the static pressure tile bracket, the bottom plane of the lifting adjustment inclined iron is in contact with the bottom of the installation groove, and the lifting adjustment inclined iron can slide between the static pressure tile bracket and the support I; a motor A is installed on this side of the support IV below the upper support overturning motor, and the driving end of the motor A is fixedly connected with one end of the right and left threaded screw rod.
[0010] Further, the inclination of the top of the two lifting adjustment inclined irons is consistent with the inclination of the two sides of the bottom of the static pressure tile bracket.
[0011] Further, in the x-axis direction of the support I, a motor B is installed at one end of the support I, a lead screw A is installed in the support I, the lead screw A is fixedly connected with the driving end of the motor B, a nut seat is installed on the lead screw A, and the top of the nut seat is fixedly connected with the support II.
[0012] Further, a proximity switch is installed on the upper support near the shaft II, two interval oil cylinder lifting stroke switches are installed on the top of the upper support and one side of the hydraulic oil cylinder, and a rotary limit switch is installed on the upper end of the support IV and both ends of the shaft IV.
[0013] Further, a piston end downward disc spring oil cylinder is installed at each of four corners of the support I, and the disc spring oil cylinder is used as a locking device of the closed static pressure center frame.
[0014] The utility model discloses the beneficial effect is: the utility model discloses by two sets of interval closed static pressure center frame clamps the large -scale long axle class workpiece, through a little adjustment of horizontal direction and vertical direction, can effectively ensure that the center position of the bearing bush keeps invariant in the process of rotor slot milling, makes the both ends of large -scale long axle class workpiece keep in the same center position, effectively guarantees the machining precision of milling rotor groove, the closed static pressure center frame makes the oil film of certain thickness between large -scale long axle class workpiece and static pressure tile, utilizes static pressure to float and makes large -scale long axle class workpiece rotate, makes workpiece be able to rotate to the angle required on the oil film, drives V type iron by the hydraulic oil cylinder of the upper support of turnover structure to clamp workpiece, can guarantee the rigidity and machining precision of clamping, and the upper support clamping mechanism of turnover structure effectively reduces the floor area of device, and two sets of closed static pressure center frame can adjust the interval on the bed body, to adapt to the large -scale long axle class workpiece of different length. BRIEF DESCRIPTION OF DRAWINGS
[0015] The utility model is further explained in connection with the drawings and specific embodiment.
[0016] Figure 1 It is the structural schematic diagram of the utility model.
[0017] Figure 2 It is the exploded schematic diagram of the utility model.
[0018] Figure 3 It is the schematic diagram of the upper support of the utility model when overturning.
[0019] Figure 4 It is the bottom schematic diagram of the utility model.
[0020] Figure 5 It is Figure 1 the schematic diagram of the other side.
[0021] Figure 6 It is the schematic diagram of the support II of the utility model.
[0022] Figure 7 is the exploded schematic view of the support IV of the utility model.
[0023] Figure 8 is the cross section schematic view of the support IV of the utility model.
[0024] Figure 9 is the schematic view of the support III of the utility model.
[0025] Figure 10 is the schematic view of the utility model in use.
[0026] Figure 11 is the schematic view of the upper support of the utility model when opening.
[0027] Figure 12 is the position schematic view of the oil cylinder lifting stroke switch and the rotation limit switch of the utility model.
[0028] Figure 13 is the cross section structure schematic view of the utility model.
[0029] Figure 14 is the back schematic view of the utility model.
[0030] Mark in the figure:
[0031] 1, support I, 2, support II, 201, installation groove, 3, support A, 4, support B, 5, cover plate, 6, support III, 7, support IV, 8, cycloidal pin wheel reducer, 9, worm a, 10, worm wheel a, 11, gear a, 12, disc spring oil cylinder, 13, motor A, 14, lead screw A, 15, nut seat, 16, static pressure tile bracket, 17, static pressure tile, 18, shaft I, 19, shaft II, 20, capillary tube damper, 21, upper support, 22, hydraulic oil cylinder, 23, V-shaped iron, 24, upper support turnover motor, 25, worm wheel b, 26, shaft III, 27, large straight gear, 28, shaft IV, 29, gear b, 30, oil cylinder lifting stroke switch, 31, worm b, 32, oil return pipe, 33, right and left thread lead screw, 34, lifting adjustment inclined iron, 35, motor B, 36, proximity switch, 37, rotation limit switch. DETAILED DESCRIPTION
[0032] As Figure 1As shown in FIG. 14, a closed static pressure center frame comprises a support I 1, a support II 2, a support A 3, a support B 4, a support III 6, a support IV 7, a static pressure tile bracket 16 and an upper support 21. The support II 2 is slidingly installed on the top of the support I 1. The support A 3 and the support B 4 are respectively installed on both sides of the support I 1. The top of the support A 3 and the top of the support B 4 are respectively provided with a cover plate 5. One side of the support I 1 in the direction of the z-axis main shaft is provided with a cycloidal pin wheel speed reducer 8. The cycloidal pin wheel speed reducer 8 is located in the support B 4. A set of intermeshing worm a 9 and worm wheel a 10 are installed in the support I 1. The worm a 9 is fixed with the driving end of the cycloidal pin wheel speed reducer 8. A coaxial gear a 11 is installed below the worm wheel a 10.
[0033] The top of one side of the support II 2 is provided with a protruding installation groove 201. A fixed seat 202 is provided on the support II 2 at the side of the installation groove 201. The semi-circular static pressure tile bracket 16 is installed in the installation groove 201. The static pressure tile 17 is embedded in the static pressure tile bracket 16. The inside of the static pressure tile bracket 16 below the static pressure tile 17 is a static pressure oil cavity. In the direction of the z-axis of the support I 1, the outside one side of the installation groove 201 is provided with a capillary tube damper 20. The capillary tube damper 20 is communicated with the inside static pressure oil cavity of the static pressure tile bracket 16. The inside static pressure oil cavity of the static pressure tile bracket 16 is also connected with an oil return pipe 32. The vertical support III 6 is installed on the support I 1 and fixed with one side of the installation groove 201. The vertical support IV 7 is installed on the fixed seat 202 and fixed with the other side of the installation groove 201. A horizontal shaft I 18 is installed in the upper end of the support III 6. A vertical shaft II 19 is fixed at the center of the shaft I 18.
[0034] An upper support overturning motor 24 is installed at the upper position of one side of the support IV 7. A worm b 31 is installed in the support IV 7. The worm b 31 is fixed with the driving end of the upper support overturning motor 24. An shaft III 26 is installed in the support IV 7 above the worm b 31. The shaft III 26 is crosswise arranged with the worm b 31. A worm wheel b 25 and a large straight gear 27 are installed on the shaft III 26. The worm wheel b 25 is engaged with the worm b 31. An shaft IV 28 is installed in the support IV 7 above the shaft III 26. The shaft IV 28 is coaxial with the shaft III 26. The shaft IV 28 is provided with a gear b 29 engaged with the large straight gear 27.
[0035] The horizontal upper support 21 is installed on the support III 6 and the support IV 7. One side of the upper support 21 is fixedly connected with both ends of the shaft IV 28. The other side of the upper support 21 is cooperatively connected with the shaft II 19 and fixed by a nut. A hydraulic oil cylinder 22 with a piston end downward is installed at the top center of the upper support 21. A V-shaped iron 23 with an opening downward is provided at the bottom center of the upper support 21. The piston end of the hydraulic oil cylinder 22 is fixedly connected with the top center of the V-shaped iron 23.
[0036] The middle part of the bottom of the static pressure tile bracket 16 is horizontally arranged, and the two sides of the bottom of the static pressure tile bracket 16 are symmetrically arranged in an inclined manner; two lifting adjustment inclined irons 34 are symmetrically arranged between the bottom of the static pressure tile bracket 16 and the support I1, and a horizontal positive and negative threaded screw 33 is arranged on the two lifting adjustment inclined irons 34; the top inclined surface of the lifting adjustment inclined iron 34 is in contact with the two sides of the bottom of the static pressure tile bracket 16, and the bottom plane of the lifting adjustment inclined iron 34 is in contact with the bottom of the mounting groove 201; the lifting adjustment inclined iron 34 can slide between the static pressure tile bracket 16 and the support I1; below the upper support overturning motor 24, a motor A13 is arranged on one side of the support IV7; the driving end of the motor A13 is fixedly connected with one end of the positive and negative threaded screw 33; the inclination of the top of the two lifting adjustment inclined irons 34 is consistent with the inclination of the two sides of the bottom of the static pressure tile bracket 16.
[0037] In the x-axis direction of the support I1, a motor B35 is arranged at one end of the support I1, a screw A14 is arranged in the support I1, the screw A14 is fixedly connected with the driving end of the motor B35, and a nut seat 15 is arranged on the screw A14, and the top of the nut seat 15 is fixedly connected with the support II2.
[0038] A proximity switch 36 is arranged on one side close to the shaft II 19 on the upper support 21; two interval oil cylinder lifting stroke switches 30 are arranged on one side of the hydraulic oil cylinder 22 on the top of the upper support 21; a rotary limit switch 37 is arranged on both ends of the shaft IV 28 on the upper end of the support IV7.
[0039] A disc spring oil cylinder 12 with a piston end downward is arranged at each corner of the support I1, and the disc spring oil cylinder 12 is used as a locking device of the closed static pressure center frame.
[0040] In the use process, the closed static pressure center frame has two sets, which are arranged on the bed body in a spaced manner; the bed body is provided with a guide rail and a rack; the gear a11 is connected with the rack of the bed body in a meshing manner; the output end of the cycloidal pin wheel speed reducer 8 drives the worm a9 to rotate under the support of the bearing; the worm a9 drives the worm wheel a10 and the axle to rotate under the support of the bearing; the worm wheel a10 drives the coaxial gear a11 to rotate; under the meshing action of the gear a11 and the rack of the bed body, the support I1 moves on the guide rail of the bed body; in this way, under the driving action of the cycloidal pin wheel speed reducer 8, the closed static pressure center frame moves in the z-axis direction of the bed body through the worm and gear transmission and the gear and rack transmission; the distance between the two closed static pressure center frames is adjusted according to the length of the large long shaft workpiece.
[0041] The output end of the upper support overturning motor 24 drives the worm b31 to rotate under the support of the bearing, the worm b31 drives the worm gear b25 and the shaft III 26 and the large spur gear 27 coaxial therewith to rotate under the support of the bearing, the large spur gear 27 further drives the gear b29 and the shaft IV 28 to rotate under the support of the bearing, so that under the driving action of the upper support overturning motor 24, through the transmission of the worm gear and the gear, the gear b29 and the shaft IV 28 drive the upper support 21 to overturn and open.
[0042] The large long shaft workpiece is hoisted into the static pressure tile bracket 16 of the closed static pressure center stand, the two ends of the large long shaft workpiece are supported by the center, the static pressure tile 17 is supplied with oil by the capillary damper 20, and an oil film with a certain thickness is formed between the large long shaft workpiece and the static pressure tile 17, so that the static pressure floating of the large long shaft workpiece is realized; at this time, the large long shaft workpiece starts to rotate, and after the large long shaft workpiece rotates to the required angle, the static pressure oil is discharged through the oil return pipe 32; during the rotation of the large long shaft workpiece, the capillary damper 20 will always provide static pressure oil, and the static pressure oil will always be discharged outward through the oil return pipe 32; after the large long shaft workpiece stops rotating, the upper support 21 is overturned and closed, the upper support 21 and the support III 6 are locked and fixed by the nut and the shaft II 19, the piston end of the hydraulic oil cylinder 22 drives the V-shaped iron 23 to move downward, and the V-shaped iron 23 applies a downward clamping force to the large long shaft workpiece to tightly fit and clamp the workpiece, and after clamping and fixing, the large long shaft workpiece can be machined to form a rotor slot, and the V-shaped iron 23 has a pressure of 50 tons.
[0043] The overturning structure of the upper support 21 can ensure that the large long shaft workpiece does not interfere during installation and lifting away from the closed static pressure center stand, and the occupied area is small; the static pressure tile bracket 16 is the main structure for bearing the weight of the large long shaft workpiece, and has the functions of being adjusted up and down and left and right by a small amount; the output end of the motor B35 drives the lead screw A14 to rotate, the lead screw A14 drives the nut seat 15 to drive the support II 2 to move horizontally on the support I 1; the output end of the motor A13 drives the lead screw 33 with reverse threads to rotate, the lead screw 33 with reverse threads drives the two lifting adjustment inclined irons 34 to move towards the center of the static pressure tile bracket 16 or away from the center of the static pressure tile bracket 16, and the two lifting adjustment inclined irons 34 adjust the height of the static pressure tile bracket 16; after adjustment, the closed static pressure center stand is automatically clamped on the Y-shaped groove of the bed body by the disc spring oil cylinder 12 as a locking device, so that the center position of the bearing tile remains unchanged during rotor slot milling, and the disc spring oil cylinder 12 is a hydraulic oil cylinder, which is clamped by a mechanical disc spring and can be moved after hydraulic relaxation.
[0044] Each hydraulic cylinder and capillary damper 20 of the closed hydrostatic center frame is connected with an external hydraulic pump station, the guide rail surface is lubricated by the hydraulic pump station, the floating of the large long shaft workpiece is achieved by starting the hydraulic motor to drive the gear pump to pump the hydraulic oil from the oil tank through the pipeline and the control valve group into the internal hydrostatic oil cavity of the hydrostatic tile center frame 16, under the action of oil pressure, the large long shaft workpiece is floated, the floating height can be controlled by adjusting the pressure and flow, and the control valve group and the pipeline are provided with a pressure valve, a flow valve and a flow distribution device.
[0045] The V-shaped iron 23 provides pressure through hydraulic pressure to make the hydraulic cylinder 22 have a certain moving stroke, the hydraulic cylinder 22 is provided with a cylinder lifting stroke switch 30 for limiting the hydraulic cylinder 22, the model is LXK3-20H-L-stroke switch, the stroke of the piston in the hydraulic cylinder 22 is controlled, the clamping and loosening are achieved by switching through the reversing valve, the valve group is provided with a pressure maintaining valve and a pressure detection device to ensure that the clamping of the large long shaft workpiece is stable and reliable; the proximity switch 36 on the upper support 21 is used to detect whether the upper support 21 and the support III 6 are locked and fixed, the detection distance is greater than 100 mm, in the case of in-place locking, the closed hydrostatic center frame will not work, ensuring safety; the rotary limiting switch 37 is used to limit the rotary stroke of the upper support 21, and the rotary limiting also plays a protection role, the model is WLD2 stroke switch.
Claims
1. A closed hydrostatic centering mount, characterized in that: It includes support I (1), support II (2), support A (3), support B (4), support III (6), support IV (7), static pressure tile bracket (16) and upper support (21), the support II (2) is slidably installed on the top of support I (1), support A (3) and support B (4) are installed on both sides of support I (1) respectively, the top of support A (3) and support B (4) is installed with cover plate (5);One cycloidal pin wheel reducer (8) is installed on the side of the z-axis main shaft direction of support I (1), the cycloidal pin wheel reducer (8) is located in support B (4), a set of intermeshing worm a (9) and worm wheel a (10) are installed in support I (1), the driving end of worm a (9) is fixed with cycloidal pin wheel reducer (8), a coaxial gear a (11) is installed below worm wheel a (10); The top of one side of support II (2) is provided with a protruding mounting groove (201), a fixed seat (202) is arranged on support II (2) on the side of mounting groove (201);A semicircular static pressure tile bracket (16) is installed in mounting groove (201), and a static pressure tile (17) is embedded in static pressure tile bracket (16);The inside of static pressure tile bracket (16) is a static pressure oil cavity below static pressure tile (17);In the z-axis direction of support I (1), a capillary tube damper (20) is installed on the outside of one side of mounting groove (201), the capillary tube damper (20) communicates with the inside static pressure oil cavity of static pressure tile bracket (16), and the inside static pressure oil cavity of static pressure tile bracket (16) is also connected with an oil return pipe (32);The vertical support III (6) is installed on support I (1) and fixed with one side of mounting groove (201), and the vertical support IV (7) is installed on the fixed seat (202) and fixed with the other side of mounting groove (201);A horizontal shaft I (18) is installed in the upper end of support III (6), and a vertical shaft II (19) is fixed at the center of shaft I (18); An upper support turnover motor (24) is installed at the upper position of one side of support IV (7), a worm b (31) is installed in support IV (7), and the driving end of worm b (31) is fixed with upper support turnover motor (24);Above worm b (31), a shaft III (26) is installed in support IV (7), shaft III (26) and worm b (31) are cross arranged, a worm wheel b (25) and a large straight gear (27) are installed on shaft III (26), worm wheel b (25) is engaged with worm b (31);Above shaft III (26), a shaft IV (28) is installed in support IV (7) and is same direction with shaft III (26), shaft IV (28) is installed with gear b (29) engaged with large straight gear (27); The upper support (21) in horizontal direction is installed on the support III (6) and the support IV (7), one side of the upper support (21) is fixedly connected with both ends of the shaft IV (28), the other side of the upper support (21) is connected with the shaft II (19) and is fixed by a nut; the top center of the upper support (21) is installed with a hydraulic oil cylinder (22) with a downward piston end, the bottom center of the upper support (21) is provided with a V-shaped iron (23) with an opening downward, the piston end of the hydraulic oil cylinder (22) is fixedly connected with the top center of the V-shaped iron (23).
2. A closed hydrostatic centering mount according to claim 1, characterized in that: The bottom center of the static pressure tile bracket (16) is horizontally arranged, and the two sides of the bottom of the static pressure tile bracket (16) are symmetrically and obliquely arranged.
3. A closed hydrostatic centering mount according to claim 1, characterized in that: Two lifting adjustment inclined irons (34) are symmetrically arranged between the bottom of the static pressure tile bracket (16) and the support I (1), and a horizontal right and left threaded screw rod (33) is arranged in the two lifting adjustment inclined irons (34), the top inclined surface of the lifting adjustment inclined iron (34) is in contact with the two sides of the bottom of the static pressure tile bracket (16), the bottom plane of the lifting adjustment inclined iron (34) is in contact with the bottom of the installation groove (201), and the lifting adjustment inclined iron (34) can slide between the static pressure tile bracket (16) and the support I (1); below the upper support turnover motor (24), the side of the support IV (7) is installed with a motor A (13), and the driving end of the motor A (13) is fixedly connected with one end of the right and left threaded screw rod (33).
4. A closed hydrostatic centering mount according to claim 3, characterized in that: The inclination of the top of the two lifting adjustment inclined irons (34) is consistent with the inclination of the two sides of the bottom of the static pressure tile bracket (16).
5. A closed hydrostatic centering mount according to claim 1, characterized in that: In the x-axis direction of the support I (1), one end of the support I (1) is installed with a motor B (35), a screw rod A (14) is installed in the support I (1), the driving end of the motor B (35) is fixedly connected with the screw rod A (14), and a nut seat (15) is installed on the screw rod A (14), and the top of the nut seat (15) is fixedly connected with the support II (2).
6. A closed hydrostatic centering mount according to claim 1, characterized in that: On the side close to the shaft II (19), the upper support (21) is installed with a proximity switch (36); on the top of the upper support (21), the side of the hydraulic oil cylinder (22) is installed with two spaced oil cylinder lifting stroke switches (30); on the upper end of the support IV (7), both ends of the shaft IV (28) are installed with a rotary limit switch (37).
7. A closed hydrostatic centering mount according to claim 1, characterized in that: In the four corners of the support I (1), a disc spring oil cylinder (12) with a downward piston end is installed, and the disc spring oil cylinder (12) is used as a locking device of the closed static pressure center frame.