CN110836224A - Free expansion clearance compensation formula slewing bearing - Google Patents
Free expansion clearance compensation formula slewing bearing Download PDFInfo
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- CN110836224A CN110836224A CN201911161982.1A CN201911161982A CN110836224A CN 110836224 A CN110836224 A CN 110836224A CN 201911161982 A CN201911161982 A CN 201911161982A CN 110836224 A CN110836224 A CN 110836224A
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- 238000005096 rolling process Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 56
- 210000004907 gland Anatomy 0.000 claims description 40
- 238000009434 installation Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 78
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A free expansion clearance compensation type turntable bearing is characterized in that a bearing outer ring (3), a bearing inner ring (9), a rolling body (4) and a bearing support (7) are arranged; the bearing outer ring (3) is provided with a bearing outer ring mounting hole (2) and a bearing outer ring rolling body mounting groove (10); and the bearing inner ring (9) is provided with a bearing inner ring mounting hole (6), a bearing inner ring rolling body mounting groove (22) and a stepped annular groove (23). The expansion type clearance compensation structure provided by the invention basically has no damage to the original structure of the bearing, can be suitable for turntable bearings in various forms, and can realize clearance free compensation of worn bearings in different degrees under the condition of no disassembly or even no production stop. Therefore, the invention not only can greatly prolong the service life of the turntable bearing on the premise of keeping the existing movement precision of the turntable bearing, but also can greatly reduce the manpower brought by the replacement of the bearing and greatly improve the production efficiency of the industry.
Description
Technical Field
The invention relates to a turntable bearing, in particular to a free expansion gap compensation type turntable bearing.
Background
The slewing bearing is generally composed of four major components, i.e., an inner ring, an outer ring, rolling elements, and spacers. Because the core component adopts the slewing bearing, the slewing bearing can simultaneously bear the comprehensive loads such as larger axial load, radial load, overturning moment and the like, and is a large bearing with a special structure which integrates multiple functions of supporting, rotating, transmitting, fixing and the like. The forms are many, but the structural compositions are basically the same and different. In general, the turntable bearing is provided with a mounting hole, lubricating oil and a sealing device, so that different requirements of various hosts working under different working conditions can be met; on the other hand, the turntable bearing has the characteristics of compact structure, convenient guide rotation, simple and convenient installation, easy maintenance and the like, and is widely applied to large-scale rotating devices such as hoisting and transporting machinery, constructional engineering machinery, port machinery, mining machinery, medical equipment, wind power generation equipment, radars, missile launcher and the like.
However, due to the material and heat treatment, the measures for lubrication and dust sealing, the precision of machining and assembly, the conditions for use, etc., it is objective that the roller and the raceway are damaged to different degrees by frictional movement, and the movement clearance is increased, so that the use is not satisfactory. Under long-time large working load, even if the turntable bearing has good maintenance conditions, the turntable bearing still generates certain abrasion, so that the clearance between an inner ring and an outer ring is increased to influence the working performance, and in particular to occasions with poor working environments, the bearing abrasion of the turntable bearing can be more serious, and the service life of the bearing can be greatly shortened.
Many practical production occasions have high requirements on product precision or load bearing, which puts higher requirements on the motion precision and the load bearing requirement of the bearing. For this reason, the severely worn turntable bearing has to be replaced frequently, which often leads to the production line being shut down, thereby reducing the production efficiency and economic benefits, and the material, manpower and production economic losses are enormous. Therefore, how to solve the problem of increasing the clearance of the slewing bearing well without stopping production is a hot spot direction of attention in the industry, but there is still no great breakthrough so far.
Disclosure of Invention
The invention aims to provide a free expansion gap compensation type turntable bearing, which can effectively solve the problem of failure of clearance increase caused by normal wear of the turntable bearing through the ingenious design of an expansion type gap compensation structure on the premise of no disassembly or even no shutdown, and greatly prolong the service life of the turntable bearing on the premise of keeping the existing movement precision requirement of the turntable bearing.
The technical purpose of the invention is realized by the following technical scheme:
a free expansion clearance compensation type turntable bearing is characterized by comprising a bearing outer ring (3), a bearing inner ring (9), a rolling body (4) and a bearing support (7); the bearing outer ring (3) is provided with a bearing outer ring mounting hole (2) and a bearing outer ring rolling body mounting groove (10); the bearing inner ring (9) is provided with a bearing inner ring mounting hole (6), a bearing inner ring rolling body mounting groove (22) and a stepped annular groove (23); and a plurality of rolling bodies (4) are assembled in a rolling body mounting groove between the bearing outer ring (3) and the bearing inner ring (9) and are connected in a sealing mode through a sealing belt (5). An expansion type clearance compensation structure (8) is assembled between the stepped annular groove (23) and the journal of the bearing support (7).
The expansion type clearance compensation structure (8) comprises an annular expansion cylinder body (13), an inner cavity (14) of the annular expansion cylinder body, a one-way valve pipe joint (17) and a gland (19) on the upper end face of the annular expansion cylinder body. The annular expansion cylinder body (13) consists of an oil cylinder inner ring (131) and an oil cylinder outer ring (132).
The section of the oil cylinder outer ring (132) is in a shape of v 21274, and the upper end face of the oil cylinder outer ring is provided with an O-shaped ring sealing groove (25) and a stepped oil passage (21); the section of the oil cylinder outer ring (132) is in a shape of v 21274, and the lower end surface of the oil cylinder outer ring is provided with an O-shaped ring sealing groove and a stepped oil passage (21) on the lower end surface of the oil cylinder outer ring; the section of the oil cylinder inner ring (121) is rectangular, and the upper end surface and the lower end surface of the oil cylinder inner ring are respectively provided with an oil cylinder inner ring upper end surface O-shaped ring sealing groove (26) and an oil cylinder inner ring lower end surface O-shaped ring sealing groove (27); by embedding an O-shaped sealing ring (15) on the upper end surface of an inner ring of the oil cylinder and an O-shaped sealing ring (18) on the upper end surface of an outer ring of the oil cylinder, the upper end surface of the annular expansion cylinder body (12) is tightly matched with the lower end surface of a gland (18) on the upper end surface of the annular expansion cylinder body; through end face O type sealing washer (11) and hydro-cylinder inner ring lower extreme end face O type sealing washer (12) under burying hydro-cylinder outer loop underground, cyclic annular inflation hydro-cylinder body (13) under the terminal surface with ladder annular slot under ladder face (231) closely cooperate.
An oil discharge port (28), a threaded oil filling hole (29) and a cylinder body upper end face gland mounting hole (30) are arranged on the annular expansion cylinder body upper end face gland (19); the one-way valve pipe joint (17) is tightly connected with the upper end surface of the annular expansion cylinder body upper end surface gland (19) through the threaded oil filling hole (29) and the combined sealing washer (16); the bearing inner ring (9) and the annular expansion cylinder body upper end surface gland (19) are aligned and tightly installed through the bearing inner ring installation hole (6) and the cylinder body upper end surface gland installation hole (30).
The annular expansion cylinder inner cavity (14) is a closed space formed by mutually and tightly matching and clamping the check valve pipe joint (17), the outer wall surface of the cylinder inner ring (131), the inner wall surface of the cylinder outer ring (132), the lower end surface of the annular expansion cylinder body upper end surface gland (19) and the stepped annular groove (23).
The oil cylinder inner ring (121) and the bearing support (7) are in transition fit, and the base body of the bearing inner ring (9) and the bearing support (7) do not need to be matched.
A free expansion clearance compensation type turntable bearing comprises a bearing outer ring, wherein a bearing outer ring mounting hole and a bearing outer ring rolling body mounting groove are formed in the bearing outer ring; the bearing inner ring is provided with a bearing inner ring mounting hole, a bearing inner ring rolling body mounting groove and a stepped annular groove; and a plurality of rolling bodies are assembled in a rolling body mounting groove between the bearing outer ring and the bearing inner ring and are connected in a sealing way by a sealing belt. An expansion type clearance compensation structure is tightly assembled between the stepped annular groove and the bearing support journal.
According to the scheme, the special structural improvement is only carried out on the inner ring of the bearing on the basis of maintaining the original structure of the turntable bearing: a trapezoidal annular groove is formed at the position close to the inner side; an expansion type clearance compensation structure is tightly assembled between the stepped annular groove and the bearing support journal.
Furthermore, the expansion type clearance compensation structure consists of an annular expansion cylinder body, an inner cavity of the annular expansion cylinder body, a one-way valve pipe joint and an upper end surface gland of the annular expansion cylinder body. The annular expansion cylinder body comprises an oil cylinder inner ring and an oil cylinder outer ring. The section of the outer ring of the oil cylinder is designed into a shape of '21274', the section of the inner ring of the oil cylinder is designed into a rectangle, and the upper end face and the lower end face of the inner ring and the lower end face of the outer ring of the oil cylinder are respectively provided with an O-shaped ring sealing groove; an O-shaped sealing ring is embedded in the sealing groove.
According to the scheme, the annular expansion cylinder body, the gland on the upper end face of the annular expansion cylinder body and the lower stepped face of the stepped annular groove can be in sealed fit.
Further, an oil discharge port, a threaded oil injection hole and a cylinder body upper end surface gland mounting hole are arranged on the annular expansion cylinder body upper end surface gland; the one-way valve pipe joint is connected with the gland on the upper end surface of the cylinder body through the threaded oil injection hole and the combined sealing washer; the bearing inner ring and the annular expansion cylinder body upper end surface gland are installed through the bearing inner ring installation hole and the cylinder body upper end surface gland installation hole in an aligned mode.
According to the scheme, the tight connection among the one-way valve pipe joint, the upper end surface gland of the annular expansion cylinder body and the bearing inner ring can be realized; the expansion type gap compensation structure has the functions of stabilizing and enhancing the airtightness.
Furthermore, the fit between the inner ring of the oil cylinder and the journal of the bearing support adopts transition fit, and the base body of the bearing inner ring and the journal of the bearing support do not need to be matched.
According to the scheme, the matching design can well guarantee the sealing performance of the expansion cylinder, the stable operation of the bearing is guaranteed, and free compensation of the gap is achieved.
Furthermore, for the outer tooth type turntable bearing, the inner ring structure of the outer tooth type turntable bearing is innovated, and an expansion type clearance compensation structure is combined. Correspondingly, the outer ring structure of the inner tooth type turntable bearing is innovated, and an expansion type clearance compensation structure is combined; for the toothless turntable bearing, according to the use condition, the expansion type clearance compensation structure can be compounded on the inner ring of the toothless turntable bearing, the expansion type clearance compensation structure can also be compounded on the outer ring of the toothless turntable bearing, and the expansion type clearance compensation structure can be compounded on the inner ring and the outer ring of the toothless turntable bearing simultaneously to compensate the clearance under special conditions.
According to the scheme, the expansion type clearance compensation structure has small damage to the original structure, and can be popularized to the turntable bearings in various forms, so that the clearance self-compensation of different types of turntable bearings is realized.
Furthermore, when clearance compensation is needed, a manual or motor-driven pump source can be used for inputting hydraulic oil into the expansion oil cylinder through the pipe joint with the one-way valve pipe joint. Due to the sealing effect, the annular expansion oil cylinder compensation cavity is filled with hydraulic oil, the inner ring of the expansion oil cylinder and the outer ring of the expansion oil cylinder tend to be separated, the inner ring shrinks and presses the shaft neck of the turntable bearing support along with the gradual increase of the pressure in the annular expansion oil cylinder compensation cavity, and the outer ring drives the bearing inner ring to expand together and eliminate the radial gap of the turntable bearing.
According to the scheme, the continuous compensation of the small-range gap can be realized.
In conclusion, the invention has the following beneficial effects:
the invention utilizes the expansion type clearance compensation structure to reform the turntable bearings in different forms, not only can realize the continuous compensation of small-range clearances on the premise of keeping the existing movement precision of the turntable bearing, greatly prolong the service life of the turntable bearing, but also can greatly reduce the manpower, material resources and economic losses caused by bearing replacement while greatly improving the production efficiency of the industry.
Drawings
FIG. 1 is a schematic view showing an assembly relationship of the integrated apparatus of the present embodiment;
FIG. 2 is a schematic diagram of an expansion type clearance compensation structure of the present embodiment;
FIG. 3 is a view showing a structure of a bearing inner race of the present embodiment;
FIG. 4 is a half sectional view of the outer ring structure of the cylinder in the present embodiment;
FIG. 5 is a half sectional view of the inner ring structure of the cylinder in the present embodiment;
FIG. 6 is a structural view of an end face gland of the annular expansion cylinder of the present embodiment;
in the figure, 1, bearing external teeth; 2. a bearing outer ring mounting hole; 3. a bearing outer race; 4. a rolling body; 5. sealing tape; 6. a bearing inner race mounting hole; 7. a bearing support; 8. an expansion clearance compensation structure; 9. a bearing inner race; 10. a bearing outer ring rolling body mounting groove; 11. an O-shaped sealing ring is arranged on the lower end face of the outer ring of the oil cylinder; 12. an O-shaped sealing ring is arranged on the lower end surface of the inner ring of the oil cylinder; 13. an annular expansion oil cylinder body; 131. an inner ring of the oil cylinder; 132. an oil cylinder outer ring; 14. an inner cavity of the annular expansion cylinder body; 15. an O-shaped sealing ring is arranged on the upper end surface of the inner ring of the oil cylinder; 16. combining sealing gaskets; 17. a one-way valve pipe joint; 18. an O-shaped sealing ring is arranged on the upper end surface of the outer ring of the oil cylinder; 19. the upper end surface of the annular expansion cylinder body is pressed; 20. sealing a sealing belt welding groove on the bearing inner ring; 21. a stepped oil passage; 22. bearing inner race rolling element mounting groove; 23. a stepped annular groove; 231. a lower step surface of the trench; 232. a step surface on the groove; 24. an O-shaped ring on the lower end surface of the outer ring of the oil cylinder seals the groove; 25. an O-shaped ring on the upper end surface of the outer ring of the oil cylinder seals the groove; 26. an O-shaped ring on the upper end surface of the inner ring of the oil cylinder seals the groove; 27. an O-shaped ring on the lower end surface of the inner ring of the oil cylinder seals the groove; 28. an oil discharge port; 29. a threaded oil injection hole; 30. the upper end surface of the cylinder body is pressed against the mounting hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In this embodiment, the outer toothed slewing bearing is used for clearance compensation.
A free expansion clearance compensation type turntable bearing is characterized by comprising a bearing outer ring (3), a bearing inner ring (9), a rolling body (4) and a bearing support (7); the bearing outer ring (3) is provided with a bearing outer ring mounting hole (2) and a bearing outer ring rolling body mounting groove (10); the bearing inner ring (9) is provided with a bearing inner ring mounting hole (6), a bearing inner ring rolling body mounting groove (22) and a stepped annular groove (23); and a plurality of rolling bodies (4) are assembled in a rolling body mounting groove between the bearing outer ring (3) and the bearing inner ring (9) and are connected in a sealing mode through a sealing belt (5). An expansion type clearance compensation structure (8) is assembled between the stepped annular groove (23) and the journal of the bearing support (7).
The expansion type clearance compensation structure (8) comprises an annular expansion cylinder body (13), an inner cavity (14) of the annular expansion cylinder body, a one-way valve pipe joint (17) and a gland (19) on the upper end face of the annular expansion cylinder body. The annular expansion cylinder body (13) consists of an oil cylinder inner ring (131) and an oil cylinder outer ring (132).
The section of the oil cylinder outer ring (132) is in a shape of v 21274, and the upper end face of the oil cylinder outer ring is provided with an O-shaped ring sealing groove (25) and a stepped oil passage (21); the section of the oil cylinder outer ring (132) is in a shape of v 21274, and the lower end surface of the oil cylinder outer ring is provided with an O-shaped ring sealing groove and a stepped oil passage (21) on the lower end surface of the oil cylinder outer ring; the section of the oil cylinder inner ring (121) is rectangular, and the upper end surface and the lower end surface of the oil cylinder inner ring are respectively provided with an oil cylinder inner ring upper end surface O-shaped ring sealing groove (26) and an oil cylinder inner ring lower end surface O-shaped ring sealing groove (27); by embedding an O-shaped sealing ring (15) on the upper end surface of an inner ring of the oil cylinder and an O-shaped sealing ring (18) on the upper end surface of an outer ring of the oil cylinder, the upper end surface of the annular expansion cylinder body (12) is tightly matched with the lower end surface of a gland (18) on the upper end surface of the annular expansion cylinder body; through end face O type sealing washer (11) and hydro-cylinder inner ring lower extreme end face O type sealing washer (12) under burying hydro-cylinder outer loop underground, cyclic annular inflation hydro-cylinder body (13) under the terminal surface with ladder annular slot under ladder face (231) closely cooperate.
An oil discharge port (28), a threaded oil filling hole (29) and a cylinder body upper end face gland mounting hole (30) are arranged on the annular expansion cylinder body upper end face gland (19); the one-way valve pipe joint (17) is tightly connected with the upper end surface of the annular expansion cylinder body upper end surface gland (19) through the threaded oil filling hole (29) and the combined sealing washer (16); the bearing inner ring (9) and the annular expansion cylinder body upper end surface gland (19) are aligned and tightly installed through the bearing inner ring installation hole (6) and the cylinder body upper end surface gland installation hole (30).
The annular expansion cylinder inner cavity (14) is a closed space formed by mutually and tightly matching and clamping the check valve pipe joint (17), the outer wall surface of the cylinder inner ring (131), the inner wall surface of the cylinder outer ring (132), the lower end surface of the annular expansion cylinder body upper end surface gland (19) and the stepped annular groove (23).
The oil cylinder inner ring (121) and the bearing support (7) are in transition fit, and the base body of the bearing inner ring (9) and the bearing support (7) do not need to be matched.
A free expansion clearance compensating slewing bearing, as shown in fig. 1 and 2, comprises a bearing outer ring (3); a bearing inner race (9); rolling bodies (4); an expanding clearance compensation structure (8). The bearing inner ring (9) of the external tooth type turntable bearing is subjected to special structural transformation on the basis of the original structure of the external tooth type turntable bearing, and a trapezoidal annular groove (23) is formed at the position close to the inner side; an expansion type clearance compensation structure (8) is tightly assembled between the stepped annular groove (23) and the journal of the bearing support (7).
The expansion type clearance compensation structure (8) comprises an annular expansion cylinder body (13), an inner cavity (14) of the annular expansion cylinder body, a one-way valve pipe joint (17) and a gland (19) on the upper end face of the annular expansion cylinder body. The annular expansion cylinder body (13) consists of an inner cylinder ring (131) and an outer cylinder ring (132). The section of the oil cylinder outer ring (122) is designed to be 21274, the section of the oil cylinder inner ring (121) is designed to be rectangular, and the upper end face and the lower end face of the inner ring and the lower end face of the outer ring are provided with O-shaped ring sealing grooves; the upper end face of the annular expansion cylinder body (13) is hermetically matched with the lower end face of the gland (19) on the upper end face of the annular expansion cylinder body, and the lower end face of the annular expansion cylinder body (13) is hermetically matched with the lower stepped face (231) of the stepped annular groove by embedding the O-shaped sealing rings in the sealing groove.
An oil discharge port (28), a threaded oil filling hole (29) and a cylinder body upper end face gland mounting hole (30) are arranged on an annular expansion cylinder body upper end face gland (19); the tight connection of the one-way valve pipe joint (17) and the upper end surface of the upper end surface gland (19) of the annular expansion cylinder body is realized through a threaded oil filling hole (29) and a combined sealing washer (16); the bearing inner ring (9) and the annular expansion cylinder body upper end surface gland (19) are tightly installed through the alignment of the bearing inner ring installation hole (6) and the cylinder body upper end surface gland installation hole (30), and the whole expansion type clearance compensation structure is stabilized and the tightness is enhanced.
The oil cylinder inner ring (121) and the bearing support (7) are in transition fit, and the base body of the bearing inner ring (9) and the bearing support (7) are not required to be matched.
Description of specific embodiments:
the working principle of the invention is that, referring to fig. 2, when clearance compensation is needed, a manual or motor-driven pump source can be used for inputting hydraulic oil into the annular expansion cylinder body (13) through a threaded oil injection hole with a one-way valve pipe joint (17). Because the integral sealing of the oil cylinder is good, as the hydraulic oil is filled into the annular expansion cylinder body inner cavity (14), the pressure in the expansion oil cylinder is gradually increased, and the strong oil pressure tends to extrude the oil cylinder inner ring (131) and the oil cylinder outer ring (132) towards two sides respectively. Under the action of the pressure, the inner ring shrinks and tightly presses the shaft neck of the turntable bearing support, the outer ring drives the bearing inner ring to expand together, and then the loose gap between the inner ring and the outer ring of the bearing is filled, and the worn turntable bearing is freely compensated for the axial gap.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment as necessary without inventive contribution after reading the present specification, but all are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. A free expansion clearance compensation type turntable bearing is characterized in that a bearing outer ring (3), a bearing inner ring (9), a rolling body (4) and a bearing support (7) are arranged; the bearing outer ring (3) is provided with a bearing outer ring mounting hole (2) and a bearing outer ring rolling body mounting groove (10); the bearing inner ring (9) is provided with a bearing inner ring mounting hole (6), a bearing inner ring rolling body mounting groove (22) and a stepped annular groove (23); and a plurality of rolling bodies (4) are assembled in a rolling body mounting groove between the bearing outer ring (3) and the bearing inner ring (9) and are connected in a sealing mode through a sealing belt (5). An expansion type clearance compensation structure (8) is assembled between the stepped annular groove (23) and the journal of the bearing support (7).
2. A free expansion clearance compensating slewing bearing according to claim 1, wherein: the expansion type clearance compensation structure (8) comprises an annular expansion cylinder body (13), an inner cavity (14) of the annular expansion cylinder body, a one-way valve pipe joint (17) and a gland (19) on the upper end face of the annular expansion cylinder body. The annular expansion cylinder body (13) consists of an oil cylinder inner ring (131) and an oil cylinder outer ring (132).
3. A free expansion clearance compensating slewing bearing according to claim 2, wherein: the section of the oil cylinder outer ring (132) is in a shape of v 21274, and the upper end face of the oil cylinder outer ring is provided with an O-shaped ring sealing groove (25) and a stepped oil passage (21); the section of the oil cylinder outer ring (132) is in a shape of v 21274, and the lower end surface of the oil cylinder outer ring is provided with an O-shaped ring sealing groove and a stepped oil passage (21) on the lower end surface of the oil cylinder outer ring; the section of the oil cylinder inner ring (121) is rectangular, and the upper end surface and the lower end surface of the oil cylinder inner ring are respectively provided with an oil cylinder inner ring upper end surface O-shaped ring sealing groove (26) and an oil cylinder inner ring lower end surface O-shaped ring sealing groove (27); by embedding an O-shaped sealing ring (15) on the upper end surface of an inner ring of the oil cylinder and an O-shaped sealing ring (18) on the upper end surface of an outer ring of the oil cylinder, the upper end surface of the annular expansion cylinder body (12) is tightly matched with the lower end surface of a gland (18) on the upper end surface of the annular expansion cylinder body; through end face O type sealing washer (11) and hydro-cylinder inner ring lower extreme end face O type sealing washer (12) under burying hydro-cylinder outer loop underground, cyclic annular inflation hydro-cylinder body (13) under the terminal surface with ladder annular slot under ladder face (231) closely cooperate.
4. A free expansion clearance compensating slewing bearing according to claim 2, wherein: an oil discharge port (28), a threaded oil filling hole (29) and a cylinder body upper end face gland mounting hole (30) are arranged on the annular expansion cylinder body upper end face gland (19); the one-way valve pipe joint (17) is tightly connected with the upper end surface of the annular expansion cylinder body upper end surface gland (19) through the threaded oil filling hole (29) and the combined sealing washer (16); the bearing inner ring (9) and the annular expansion cylinder body upper end surface gland (19) are aligned and tightly installed through the bearing inner ring installation hole (6) and the cylinder body upper end surface gland installation hole (30).
5. A free expansion clearance compensating slewing bearing according to claim 2, wherein: the annular expansion cylinder inner cavity (14) is a closed space formed by mutually and tightly matching and clamping the check valve pipe joint (17), the outer wall surface of the cylinder inner ring (131), the inner wall surface of the cylinder outer ring (132), the lower end surface of the annular expansion cylinder body upper end surface gland (19) and the stepped annular groove (23).
6. A free expansion clearance compensating slewing bearing according to claim 2, wherein: the oil cylinder inner ring (121) and the bearing support (7) are in transition fit, and the base body of the bearing inner ring (9) and the bearing support (7) do not need to be matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161982.1A CN110836224B (en) | 2019-11-25 | 2019-11-25 | Free expansion clearance compensation formula slewing bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161982.1A CN110836224B (en) | 2019-11-25 | 2019-11-25 | Free expansion clearance compensation formula slewing bearing |
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| Publication Number | Publication Date |
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| CN110836224A true CN110836224A (en) | 2020-02-25 |
| CN110836224B CN110836224B (en) | 2021-03-16 |
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| CN201911161982.1A Active CN110836224B (en) | 2019-11-25 | 2019-11-25 | Free expansion clearance compensation formula slewing bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983975A (en) * | 2021-01-21 | 2021-06-18 | 南京工程学院 | Low-temperature-resistant self-compensating clearance bearing |
| CN114623154A (en) * | 2022-04-01 | 2022-06-14 | 安徽日基焊接装备有限公司 | Novel aluminium system carousel of structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112983975A (en) * | 2021-01-21 | 2021-06-18 | 南京工程学院 | Low-temperature-resistant self-compensating clearance bearing |
| CN112983975B (en) * | 2021-01-21 | 2022-03-18 | 南京工程学院 | Low-temperature-resistant self-compensating clearance bearing |
| CN114623154A (en) * | 2022-04-01 | 2022-06-14 | 安徽日基焊接装备有限公司 | Novel aluminium system carousel of structure |
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