CN216382573U - Deep hole lathe is awarded oily ware and is used big specification mechanical seal device - Google Patents
Deep hole lathe is awarded oily ware and is used big specification mechanical seal device Download PDFInfo
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- CN216382573U CN216382573U CN202122624545.8U CN202122624545U CN216382573U CN 216382573 U CN216382573 U CN 216382573U CN 202122624545 U CN202122624545 U CN 202122624545U CN 216382573 U CN216382573 U CN 216382573U
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Abstract
The utility model relates to the field of metal cutting machine tools, in particular to a large-size mechanical sealing device for an oil supplier of a deep hole machine tool, which comprises an oil supplier head, a bearing sleeve, a stationary ring and a rotating ring, wherein the bearing sleeve is rotatably assembled in the oil supplier head, the rotating ring is fixedly and hermetically sleeved at the tail end of the bearing sleeve in an externally sleeved mode and synchronously rotates with the bearing sleeve, the stationary ring is fixedly and hermetically sleeved at the tail end of the oil supplier head in the circumferential direction, and the front end face of the stationary ring is in sliding sealing fit with the rear end face of the rotating ring. The sealing device is provided with the static ring, the rotating ring and the matching structure thereof, is suitable for large-size mechanical sealing, ensures the sealing performance, is convenient to assemble, prolongs the service life by several times, and ensures the long-term stable operation of the oil supply device.
Description
Technical Field
The utility model relates to the field of metal cutting machine tools, in particular to a large-specification mechanical sealing device for an oil supply device of a deep hole machine tool.
Background
In mechanical equipment, deep hole refers to a hole with a ratio of depth to aperture of the processed hole larger than 5:1, common deep hole processing modes include BTA deep hole drilling, deep hole boring, deep hole rolling and the like, and machine tool equipment for processing deep hole parts in the deep hole processing mode is called a deep hole machine tool.
The deep hole drilling and boring machine usually adopts a workpiece rotating mode to process, and the oil supply device is used as a key component of a deep hole machine tool and mainly has the following functions: firstly, a cutter guide sleeve is arranged at the head part and used for guiding a deep hole cutter to realize cutting-in precision; secondly, a conical disc (with a hollow inner cone) is arranged at the head part and is used for realizing the positioning and clamping of the workpiece together with the bed head assembly; forming a sealing cavity meeting the rotation condition of the workpiece, providing a high-pressure cutting cooling medium, cooling a cutting area and flushing away chips; and fourthly, guiding the cutter bar by the tail end.
The oil supply device meets the requirement of rotating and clamping the workpiece, and a sealing cavity is formed, so that a corresponding rotating sealing component is required. The conventional structure is that a combined rotary sealing ring is adopted, namely an elastomer and a sliding ring combination, and the sliding ring surface and a quenching sealing ring directly form sliding motion, which can be referred to CN 211992080U. Under the condition of cutting cooling liquid pressure of 2.5MPa, the allowable linear speed of a sliding ring does not exceed 2m/s, taking a deep hole machine tool oil feeder with the specification of 200mm as an example, the outer diameter of a rotary sealing ring is 275mm, which is equivalent to the allowable rotating speed of a workpiece positioned and clamped by the oil feeder does not exceed 140 r/min.
After the rotary sealing ring fails, cutting cooling liquid is decompressed and flows out through a bearing at the head of the oil supply device, so that lubricating grease of the bearing is lost, and finally the bearing is damaged early. And because of the special structure of the oil-supplying device, the change of the rotary sealing ring is very complicated, the bearing of the oil-supplying device needs to be disassembled and assembled, and the repeated disassembly and assembly can greatly reduce the rotary precision of the oil-supplying device head.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the application provides a large-size mechanical sealing device for an oil distributor of a deep hole machine tool, which is provided with a static ring, a rotating ring and a matching structure of the rotating ring, is suitable for large-size mechanical sealing, ensures the sealing performance, is convenient to assemble, prolongs the service life by several times in stages, and ensures the long-term stable operation of the oil distributor device. The technical scheme adopted by the utility model is as follows:
a large-size mechanical sealing device for an oil supplier of a deep hole machine tool comprises an oil supplier head, a bearing sleeve, a stationary ring and a rotating ring, wherein the bearing sleeve is rotatably assembled in the oil supplier head, the rotating ring is fixedly and hermetically sleeved at the tail end of the bearing sleeve and synchronously rotates with the bearing sleeve, the stationary ring is fixedly and hermetically sleeved at the tail end of the oil supplier head, and the front end face of the stationary ring is in sliding sealing fit with the rear end face of the rotating ring.
The deep hole machine tool oil feeding device adopts a large-specification mechanical sealing device, and the static ring is in floating connection with the oil feeding head in the axial direction.
The deep hole machine tool oil feeder uses a large-scale mechanical sealing device, and the static ring is a flanged ring structure with a neck; the head end and the tail end of the oil feeder are provided with stepped holes with reduced hole diameters, and a plurality of elastic pieces are arranged in the stepped end faces of the stepped holes at intervals;
the neck of the static ring is sleeved in the step hole in a sealing mode, and the floating connection is that the front end of each elastic part extrudes the rear end face of the flange part of the static ring respectively.
According to the large-size mechanical sealing device for the oil supply device of the deep hole machine tool, the elastic pieces are uniformly distributed in the circumference in the end face of the step hole at the tail end of the oil supply head, and the elastic pieces are springs.
The deep hole machine tool oil feeder uses a large-specification mechanical sealing device, and the step end face of the step hole is connected with the flange part of the static ring through at least one rotation stopping pin so as to circumferentially fix the static ring.
According to the large-size mechanical sealing device for the oil supply device of the deep hole machine tool, the tail end of the bearing sleeve is provided with the step sleeve with the reduced outer diameter, the rotating ring is sleeved on the step sleeve in a sealing mode, the step end face of the step sleeve and the rotating ring are connected through at least one positioning pin to fix the rotating ring in the circumferential direction, and the step sleeve is provided with the pressure plate to fix the rotating ring in the axial direction.
The deep hole machine tool oil supply device is a large-specification mechanical sealing device, a static sealing surface and a static cooling surface are arranged on the front end surface of the static ring, and the static cooling surface is positioned in the inner ring range of the static sealing surface and is a concave surface;
the rear end face of the rotating ring is provided with a dynamic sealing surface and a dynamic cooling surface, and the dynamic cooling surface is in the inner ring range of the dynamic sealing surface and is a concave surface;
the static sealing surface and the dynamic sealing surface are correspondingly matched in a sliding sealing mode, and a space capable of containing cooling liquid is correspondingly formed between the static cooling surface and the dynamic cooling surface.
According to the large-size mechanical sealing device for the deep hole machine tool oil supplier, the stationary ring and the rotating ring are both made of 9SiCr materials, the hardness is not less than HRC60, the planeness of the mating surface of the stationary ring and the mating surface of the rotating ring are not more than 0.0006 mu m, the surface roughness is not more than Ra0.1 mu m, and the width of a sliding sealing surface formed between the stationary ring and the rotating ring is not more than 3 mm.
The utility model has the beneficial effects that:
the tail part of the oil supplier head is provided with the static ring and the rotating ring, and the end surfaces of the static ring and the rotating ring form a sliding seal matching surface, so that the oil supplier head is suitable for mechanical seal of large-size shaft hole parts and is convenient to process, manufacture and assemble.
The stationary ring is axially floated, can slightly move in the axial direction, is firmly pressed with the rotating ring, realizes the function of rotary sealing, can compensate the jumping tolerance and the micro-abrasion of the sliding sealing matching surface, and simultaneously ensures the sealing effect of the sliding sealing matching surface under a certain pressure state.
The self structure and the sealing matching structure of the rotating ring and the stationary ring are designed, so that the edge of the sliding sealing matching surface of the rotating ring and the stationary ring is in contact with cooling liquid to form rotary flow, friction heating is greatly reduced, abrasion is reduced, sealing reliability is guaranteed, the service life of a workpiece is prolonged, the allowable rotating speed is high, maintenance-free performance is realized, the oil supply device can work in a high-precision working condition for a long time, and the oil supply device is particularly suitable for being configured on high-end deep hole machine tools or occasions where the oil supply device is used for processing small inclined holes, special cooling cutting fluid media and the like.
The respective positioning and fixing structures of the rotating ring and the stationary ring are simple, the cost is saved, and the assembly is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is a schematic front view of a stationary ring according to the present invention;
FIG. 4 is a schematic view of the back structure of the stationary ring of the present invention;
FIG. 5 is a front view schematically illustrating the structure of the rotating ring according to the present invention;
FIG. 6 is a back side view schematically showing the structure of the rotating ring of the present invention.
In the figure: 1-an oil feeding head, 2-a bearing, 3-a bearing sleeve, 4-a conical disc, 5-a cutter guide sleeve, 6-a rotation stopping pin, 7-a static ring, 8-a rotating ring, 9-a positioning pin, 10-a sealing ring I, 11-a spring, 12-a sealing ring II, 13-a pressure plate, 14-a screw, 15-a static cooling surface, 16-a static sealing surface, 17-a dynamic cooling surface and 18-a dynamic sealing surface.
Detailed Description
The utility model is further explained below with reference to fig. 1 to 4.
The large-size mechanical sealing device described in this embodiment is a mechanical sealing device with a non-standard special design, and the specification and size of the large-size mechanical sealing device greatly exceed the mechanical sealing related standard JB/T4127.1-2013 part 1 of mechanical sealing: technical Condition the specification of the outer diameter of a rotating shaft is within phi 120 mm.
The embodiment is a large-specification mechanical sealing device for an oil supplier of a deep hole machine tool, and the large-specification mechanical sealing device comprises an oil supplier head 1, a bearing sleeve 3, a stationary ring 7 and a rotating ring 8.
The bearing sleeve 3 realizes high-precision rotation in the oil feeder head 1 through the bearing 2 and can bear radial and axial forces. The corresponding cutter guide sleeve 5 is arranged in the bearing sleeve 3 according to different cutter diameters, and the conical disc 4 is arranged at the front end of the bearing sleeve 3 according to different workpiece outer diameters so as to match with an outer chamfer of a workpiece, so that the workpiece is tightly supported and clamped.
The rotating ring 8 is fixedly and hermetically sleeved at the tail end of the bearing sleeve 3 and synchronously rotates with the bearing sleeve, the stationary ring 7 is circumferentially fixed and hermetically sleeved at the tail end of the oil supply head 1, the stationary ring 7 and the rotating ring 8 are both made of 9SiCr materials and subjected to quenching treatment, the hardness reaches more than HRC60, and the width of the matching part of the sliding sealing surface is controlled within 3 mm.
The front end surface of the static ring 7 is provided with a static sealing surface 16 and a static cooling surface 15, and the static cooling surface 15 is positioned in the inner ring range of the static sealing surface 16 and is a concave surface; the rear end face of the rotating ring 8 is provided with a dynamic sealing surface 18 and a dynamic cooling surface 17, and the dynamic cooling surface 17 is in the inner ring range of the dynamic sealing surface 18 and is a concave surface; the static sealing surface 16 and the dynamic sealing surface 18 are correspondingly and slidably matched, and the static cooling surface 15 and the dynamic cooling surface 17 are correspondingly and form a space capable of containing cooling liquid. The static sealing surface 16 and the dynamic sealing surface 18 are subjected to lapping treatment, the flatness reaches 0.0006 mu m, and the surface roughness is less than Ra0.1 mu m.
The structure of the stationary ring 7 and the connection thereof are specifically as follows: the static ring 7 is a flanged ring structure with a neck; the tail end of the oil supply head 1 is provided with a step hole with a reduced aperture, and a plurality of elastic pieces which are uniformly distributed in the circumference are arranged in the step end face of the step hole at intervals; the neck of the static ring 7 is sleeved in the step hole in a sealing mode, the front end of each elastic part extrudes the rear end face of the flange of the static ring 7 to form axial floating connection, the static ring 7 can slightly move axially to compensate the jumping tolerance and the micro-abrasion of the sliding sealing matching surface, and meanwhile the sliding sealing matching surface can still guarantee the sealing effect under the state of certain pressure. The elastic part is positioned in front of the sealing surface of the static ring 7, and cannot be corroded by liquid, so that the elasticity is ensured, and the service life is prolonged. The resilient member is preferably a spring 11. And the step end face of the step hole is connected with the flange part of the static ring 7 through at least one rotation stopping pin 6 to fix the static ring 7 in the circumferential direction, and the flange part of the static ring 7 is correspondingly provided with a notch so that the rotation stopping pin 6 passes through the notch.
The structure of the rotating ring 8 and the connection thereof are specifically: the tail end of the bearing sleeve 3 is provided with a step sleeve with a reduced outer diameter, the rotating ring 8 is sleeved on the step sleeve in a sealing mode, the step end face of the step sleeve is connected with the rotating ring 8 through at least one positioning pin 9 to fix the rotating ring 8 in the circumferential direction, and the step sleeve is provided with a pressure plate 13 to fix the rotating ring 8 in the axial direction. Thus, synchronous high-precision rotation is realized between the rotating ring 8 and the bearing sleeve 3.
In the operating state, the axial pressure to which the rotating ring 8 is subjected includes: (1) the cooling cutting fluid pressure between the static cooling surface 15 and the dynamic cooling surface 17, which is directed to the left; (2) the force of the spring 11 is directed to the left. Under the action of two resultant forces, the combination between the stationary ring 7 and the rotating ring 8 is firm, and the sliding sealing effect is realized. The magnitude control of two resultant forces is so as not to generate heat excessively, and simultaneously the cooling cutting fluid contacts with the inner edge of the sliding sealing surface and forms rotary flow, takes away heat generated by friction, and greatly prolongs the service life of the sealing device.
In this embodiment, the working pressure and the required linear velocity of rotation are comprehensively considered according to the special working condition of the oil feeder as a bias high pressure container, so that the sealing device can finally work under the working conditions of the pressure not greater than 2.5MPa and the linear velocity not greater than 15m/s for a long time. Taking the oil supplier of the deep hole machine tool with the specification of 200mm as an example, the allowable rotating speed of the workpiece positioned and clamped by the oil supplier can reach 1000 r/min.
Claims (8)
1. The utility model provides a deep hole lathe awards oily ware with big specification mechanical seal device, includes awarding oily head (1), bearing housing (3), stationary ring (7) and rotatory ring (8), rotatory assembly in awarding oily head (1) of bearing housing (3), its characterized in that: the rotating ring (8) is fixedly sleeved on the tail end of the bearing sleeve (3) in a sealing mode and rotates synchronously with the bearing sleeve, the stationary ring (7) is fixed on the circumferential direction and sleeved on the tail end of the oil feeding head (1) in a sealing mode, and the front end face of the stationary ring (7) is in sliding sealing fit with the rear end face of the rotating ring (8).
2. The deep hole machine tool oil distributor large-specification mechanical sealing device according to claim 1, characterized in that: the static ring (7) is in floating connection with the oil feeding head (1) in the axial direction.
3. The deep hole machine tool oil distributor large-specification mechanical sealing device according to claim 2, wherein: the static ring (7) is a flange ring structure with a neck; the tail end of the oil supply head (1) is provided with a step hole with a reduced aperture, and a plurality of elastic pieces are arranged in the step end face of the step hole at intervals;
the neck of the static ring (7) is sleeved in the step hole in a sealing manner, and the front end of each elastic part is in floating connection with the rear end face of the flange part of the static ring (7) respectively extruded.
4. The deep hole machine tool oil distributor large-specification mechanical sealing device according to claim 3, wherein: the elastic pieces are uniformly distributed in the circumference in the end face of the step hole at the tail end of the oil supply head (1), and the elastic pieces are springs (11).
5. The deep hole machine tool oil distributor large-specification mechanical sealing device according to claim 3, wherein: the step end face of the step hole is connected with the flange part of the static ring (7) through at least one rotation stopping pin (6) to circumferentially fix the static ring (7).
6. The deep hole machine tool oil distributor large-specification mechanical sealing device according to claim 1, characterized in that: the tail end of the bearing sleeve (3) is set to be a step sleeve with the reduced outer diameter, the rotating ring (8) is sleeved on the step sleeve in a sealing mode, the step end face of the step sleeve and the rotating ring (8) are connected through at least one positioning pin (9) to fix the rotating ring (8) in the circumferential direction, and the step sleeve is provided with a pressure plate (13) to fix the rotating ring (8) in the axial direction.
7. The deep hole machine tool oil distributor large-specification mechanical sealing device according to claim 1, characterized in that: the front end surface of the static ring (7) is provided with a static sealing surface (16) and a static cooling surface (15), and the static cooling surface (15) is positioned in the inner ring range of the static sealing surface (16) and is a concave surface;
the rear end face of the rotating ring (8) is provided with a dynamic sealing surface (18) and a dynamic cooling surface (17), and the dynamic cooling surface (17) is in the inner ring range of the dynamic sealing surface (18) and is a concave surface;
the static sealing surface (16) and the dynamic sealing surface (18) are in corresponding and sliding sealing fit, and the static cooling surface (15) and the dynamic cooling surface (17) are in corresponding and form a space capable of containing cooling liquid.
8. The deep hole machine tool oil distributor large-specification mechanical sealing device according to claim 1, characterized in that: the stationary ring (7) and the rotating ring (8) are both made of 9SiCr materials, the hardness of the stationary ring (7) and the hardness of the rotating ring (8) are not less than HRC60, the planeness of a matching surface of the stationary ring (7) and the matching surface of the rotating ring (8) are not more than 0.0006 mu m, the surface roughness of the matching surface of the stationary ring (7) and the rotating ring (8) are not more than Ra0.1 mu m, and the width of a sliding sealing surface formed between the stationary ring (7) and the rotating ring (8) is not more than 3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122624545.8U CN216382573U (en) | 2021-10-29 | 2021-10-29 | Deep hole lathe is awarded oily ware and is used big specification mechanical seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122624545.8U CN216382573U (en) | 2021-10-29 | 2021-10-29 | Deep hole lathe is awarded oily ware and is used big specification mechanical seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216382573U true CN216382573U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122624545.8U Active CN216382573U (en) | 2021-10-29 | 2021-10-29 | Deep hole lathe is awarded oily ware and is used big specification mechanical seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216382573U (en) |
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2021
- 2021-10-29 CN CN202122624545.8U patent/CN216382573U/en active Active
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