Main motor coupling

Abstract

The utility model discloses a main motor coupling, which belongs to the technical field of crowned tooth couplings and comprises a coupling, an inner tooth shaft sleeve and an outer tooth shaft sleeve, the inner tooth shaft sleeve and the outer tooth shaft sleeve are sleeved on the outer circle of the coupling, and a sealing structure is arranged between the inner tooth shaft sleeve and the outer tooth shaft sleeve and comprises a first sealing structure and a second sealing structure. A sealing strip is pressed on the outer side of the sealing strip through a fastener. The second sealing structure comprises a pressing cover and a pressing ring, the pressing cover is connected with the inner gear shaft sleeve through a first connecting piece, and the pressing ring is connected with the pressing cover through a second connecting piece; according to the main motor coupling provided by the utility model, axial and radial bidirectional sealing is realized through the sealing structures, and the risk of oil leakage is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to drum gear coupling technical field, more specifically, relate to a main motor coupling. BACKGROUND

[0002] Hot continuous rolling mill usually adopts full line automatic control, and adopts new technologies such as hydraulic AGC thickness automatic control, powerful bending roller system, quick roll changing etc. In the eighties of last century, hot continuous rolling production widely adopts thin slab continuous casting and rolling technology, and after heating, the blank is directly sent to the rolling line from steelmaking and continuous casting. Gradually develop into the process characteristics of short process, low energy consumption and high production efficiency, the main motor coupling of the finishing rolling area needs to be continuously in the machine for a long time, which requires that the lubrication of the gear part fully guarantees the wear resistance of the gear. At present, the sealing structure of the main motor coupling still adopts the old split lip seal, which still has the following shortcomings: 1, the sealing uses nitrile rubber, which is easy to age and leak oil; 2, the sealing is not pressed tightly after cutting and bonding, and the interface is broken after a period of time, and the oil leaks axially; 3, the sealing leaks oil radially after running for a period of time; 4, the sealing installation space is small, and it is not easy to install and replace, and the installation quality cannot be guaranteed.

[0003] For the above-mentioned main motor coupling sealing structure, the continuous in-machine of the finishing main motor coupling of the hot continuous rolling short process production line is still not fundamentally solved for not less than 12 months without oil leakage, and the oil leakage leads to fast wear of the gear part, frequent replacement, high labor cost, lubrication and spare parts cost, at the same time, the oil splashing seriously pollutes the environment, and affects the on-site 6S management.

[0004] After searching, the patent CN105987172A discloses a bolt coupling bidirectional static sealing structure, including bolt, elastic pad, flat pad, sealing ring. The flat pad has chamfer or concave stop on one side of the orifice, and the chamfer or concave stop is assembled with the sealing ring on one side, and the sealing ring is embedded in the chamfer or concave stop of the flat pad; the flat pad is assembled in close contact with the contact surface on one side of the embedded sealing ring. The sealing ring is embedded in the chamfer or concave stop of the flat pad, and when the bolt is tightened, the sealing ring is extruded to occur elastic deformation, and all gaps are completely blocked in radial and axial directions to prevent fluid leakage. The sealing structure is a static sealing structure, and is mainly used for axial sealing.

[0005] The utility model discloses a bellows sealing structure and gear coupling applying same, belongs to the field of coupling sealing structure. The bellows sealing structure of the utility model, including bellows, first compression ring, first sealing ring, second compression ring and second sealing ring, one end of bellows is fixedly pressed on the tooth cover end cover of inner tooth cover through second compression ring, and second compression ring is fixed on tooth cover end cover through second compression ring bolt, and second sealing ring is at least arranged between the corresponding end flanging of tooth cover end cover and bellows, is sealed to the thread cooperation gap of second compression ring bolt at the same time to the lubricating cavity. Through the reasonable setting of compression ring bolt and sealing ring, the sealing flanging of sealing ring is sealed with the gap of tooth cover end cover, and the thread gap of bolt is also sealed, effectively prevent the leakage of lubricating medium from the thread hole gap of compression ring bolt, improve the sealing property of the bellows sealing structure of gear coupling, improve the working stability and service life of coupling, and the sealing structure is axial sealing.

[0006] The above structure is used for static sealing structure, and bidirectional sealing cannot be realized for the coupling in dynamic environment. SUMMARY

[0007] 1. PROBLEMS TO BE SOLVED

[0008] In view of the problem that the existing structure cannot realize dynamic bidirectional sealing, the utility model provides a main motor coupling, which can realize bidirectional sealing in a dynamic environment.

[0009] 2. TECHNICAL SCHEME

[0010] To solve the above problem, the utility model adopts the following technical scheme.

[0011] A main motor coupling, comprising a coupling, an inner tooth sleeve, an outer tooth sleeve and a sealing structure located on both sides of the coupling, the inner tooth sleeve and the outer tooth sleeve are respectively sleeved on the outer circle of the coupling, and the sealing structure is arranged between the inner tooth sleeve and the outer tooth sleeve.

[0012] The sealing structure comprises a first sealing structure for axial sealing, and the first sealing structure comprises a sealing strip and a fastener, the sealing strip is annularly sleeved on the outer periphery of the outer tooth sleeve, the outer side of the sealing strip is provided with the fastener, the sealing strip is fixed on the outer side of the outer tooth sleeve by pressing the fastener on the outer side of the sealing strip, and an axial sealing structure is formed on the outer circle of the outer tooth sleeve.

[0013] and a second sealing structure for radial sealing, the second sealing structure comprising: a gland, the gland being connected to the inner toothed shaft sleeve through a first connecting member, a compression ring, the compression ring being connected to the gland through a second connecting member, the compression ring being a component with a bent portion, the side wall of the compression ring being fitted with the side wall of the sealing strip, so that the compression ring is connected to the sealing strip above, a cavity for accommodating lubricating medium being formed between the compression ring and the sealing strip, the side wall of the compression ring and the side wall of the gland being respectively provided with a sealing groove, the sealing groove being located on the fitting surface of the compression ring and the gland with the sealing strip, and an O-shaped sealing ring being arranged in the sealing groove, the radial sealing structure being formed on the outer toothed shaft sleeve.

[0014] Preferably, the first connecting member and the second connecting member are bolts, and a gasket is arranged between the first connecting member and the gland and between the second connecting member and the compression ring, respectively, to improve the sealing performance of the sealing structure.

[0015] The lower end of the gland is provided with a protruding positioning stop, the positioning stop is fitted with the inner toothed shaft sleeve, the positioning stop is in a stepped shape, and the inner toothed shaft sleeve is limited by the positioning stop, and the two ends of the inner toothed shaft sleeve are fitted with the gland.

[0016] The compression ring is provided with a positioning ring groove, the positioning ring groove is protruded outwardly and perpendicular to the gland, and the second connecting member passes through the positioning ring groove to connect the compression ring and the gland; by arranging the gland and the compression ring, the first connecting member and the second connecting member are prevented from being broken due to the shearing force when the shaft coupling is swinging.

[0017] Further, the end angle of the gland is an arc-shaped round angle, and a gap is arranged between the arc-shaped round angle and the outer toothed shaft sleeve; since the inner toothed shaft sleeve and the outer toothed shaft sleeve are axially movable when the shaft coupling is in use, the arc-shaped round angle can avoid interfering with the round angles on both sides of the tooth portion of the outer toothed shaft sleeve when the sealing structure is axially movable.

[0018] Preferably, the sealing strip is made of an aluminum alloy strip and is connected in a ring structure, and the interface of the sealing strip is preferably bonded by a 30° bevel, so as to ensure the structural strength and have higher bonding strength. A ring groove is arranged on the outer side of the sealing strip along the length direction of the sealing strip to form a space for accommodating a hoop, and the hoop is bonded and then shrunk and pressed to ensure the axial sealing performance.

[0019] The two ends of the hoop are welded with fastening ears, and the fastening ears are provided with bolt holes, so that a fastening ring with adjustable size is formed by the tightness of the bolt and the nut.

[0020] Further, the O-shaped sealing ring is made of nitrile rubber, has good wear resistance and oil resistance, has good bonding performance, can be mass-produced, is cut into a ring according to the size of the sealing groove, and is bonded by a 30° bevel at the interface and is respectively arranged on the compression ring and the gland to form radial sealing for the sealing strip.

[0021] The main motor coupling of the present application, after changing the lip seal into a rectangular cross-section sealing strip structure, the strength is increased, the locking of the clamp on the outside of the seal ensures the axial sealing; the sealing strip is locked by the pressure ring and the gland containing the O-ring on both sides to ensure the radial sealing; the sealing strip uses fluorine rubber which is more resistant to oil and aging oxidation to ensure the sealing quality, the bevel uses 30° bonding technology to ensure sufficient bonding strength; finally, through the bolt fastening on the inner ring gear, the axial and radial bidirectional sealing structure is formed, which can meet the continuous use of the main motor coupling for more than 12 months without oil leakage, realize the full lubrication of the tooth part, reduce the frequency of on-site maintenance and replacement, reduce the labor and spare parts cost, and the replacement of the sealing strip is convenient and simple, which ensures the continuous online use of the main motor coupling.

[0022] 3. Advantageous effects

[0023] Compared with the prior art, the present application has the following advantages:

[0024] (1) The sealing structure of the main motor coupling of the present application comprises a first sealing structure of a sealing strip and a second sealing structure comprising a gland and a pressure ring, which are slidingly connected and matched to realize dynamic bidirectional sealing of the coupling, ensure that the oil in the tooth part does not leak during operation, reduce the wear of the tooth part, reduce the cost of oil, and solve the problem of 6S environment on site;

[0025] (2) The sealing structure of the main motor coupling of the present application is provided with a positioning stop at the lower end of the gland, so that when the inner tooth shaft sleeve and the gland move relatively, the force is buffered by the positioning stop; the positioning ring groove is provided on the pressure ring, so that the bolt extension is fixed and strengthened, and when axial or radial oscillation occurs, the shear force is buffered by the positioning ring groove, the structural strength is improved, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0026] The technical solutions of the present application will be further described in detail below in combination with the drawings and examples, but it should be understood that these drawings are designed only for illustrative purposes, and therefore do not limit the scope of the present application. In addition, unless specifically indicated, these drawings are only intended to conceptually illustrate the structural configuration described herein, and are not necessarily drawn to scale.

[0027] Figure 1 is a use state diagram of the main motor coupling of the present application;

[0028] Figure 2 is an enlarged view of the sealing structure of the main motor coupling of the present application;

[0029] Figure 3 is a schematic view of the clamp structure of the main motor coupling of the present application;

[0030] Figure 4This is a schematic diagram and enlarged view of the sealing strip structure and cut of the main motor coupling of this utility model, where B is an enlarged view of the sealing strip cut.

[0031] In the diagram: 1. Coupling;

[0032] 2. External gear bushing;

[0033] 3. Internal gear bushing;

[0034] 4. Sealing structure: 41. Sealing strip; 42. Fastener; 421. Fastening lug; 43. Gland; 431. First connector; 432. Positioning stop; 433. First sealing groove; 44. Pressure ring; 441. Second connector; 442. Positioning ring groove; 443. Second sealing groove. Detailed Implementation

[0035] The following detailed description and exemplary embodiments of the present invention can be better understood in conjunction with the accompanying drawings, wherein the elements and features of the present invention are identified by reference numerals.

[0036] The following detailed description of exemplary embodiments of the present invention refers to the accompanying drawings, which form part of the description and illustrate exemplary embodiments in which the present invention can be implemented. It should be understood that the following text is merely used to describe one or more specific embodiments of the present invention and does not strictly limit the specific scope of protection claimed by the present invention. The structures, proportions, sizes, etc., illustrated in the accompanying drawings are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are only for clarity of description and are not intended to limit the scope of implementation. Changes or adjustments in their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of the present invention.

[0037] Example 1

[0038] A main motor coupling 1, such as Figure 1 As shown, the coupling 1 includes an internal gear sleeve 3 and an external gear sleeve 2 sleeved on the outer circle of the coupling 1, and a sealing structure 4 is provided between the internal gear sleeve 3 and the external gear sleeve 2.

[0039] The sealing structure 4 includes a first sealing structure and a second sealing structure. The first sealing structure includes a sealing strip 41, which is an aluminum alloy strip connected in a ring shape. An annular groove is formed on the outer side of the sealing strip 41 along its length. A fastener 42 is provided in the annular groove. In embodiment 1, the fastener 42 is a clamp. The clamp is pressed against the outer side of the sealing strip 41, so that the sealing strip 41 is fixed on the outer side of the external gear sleeve 2, forming an axial sealing structure 4 on the outer circle of the external gear sleeve 2.

[0040] like Figure 3 As shown, the clamp is an adjustable clamp with fastening ears 421 welded to both ends. Bolt holes are provided on the fastening ears 421, and the tightening and loosening of the bolts and nuts form an adjustable fastening ring, thereby adjusting the tightness of the sealing strip 41.

[0041] In another embodiment of this application, the tightness of the fastener can also be adjusted by a clasp. In actual use, for ease of installation, fasteners are generally selected from components that can be installed and then wrapped around. After wrapping, in order to ensure its sealing, it needs to be pressed tight. Therefore, in addition to the fastening ear 421 and the clasp, other fasteners 42 that can be tightened can also be used.

[0042] like Figure 4 As shown, the joint of the sealing strip 41 is bonded with a 30° bevel, which ensures structural strength while providing higher bonding strength.

[0043] The second sealing structure includes a pressure cap 43 and a pressure ring 44. The pressure cap 43 is connected to the internal gear bushing 3 via a first connector 431, and the pressure ring 44 is connected to the pressure cap 43 via a second connector 441.

[0044] The pressure cap 43 is provided with a first sealing groove 433, which is located on the mating surface of the pressure cap 43 and the sealing strip 41. An O-ring is provided therein. The lower end of the pressure cap 43 near the outer gear sleeve 2 is a large arc-shaped rounded corner, and there is a gap between it and the outer gear sleeve 2. Since there is axial movement between the inner gear sleeve 3 and the outer gear sleeve 2 when the coupling 1 is in use, the large arc-shaped rounded corner can avoid interference with the rounded corners on both sides of the teeth of the outer gear sleeve 2 when the sealing structure 4 moves axially.

[0045] The pressure ring 44 is a component with a bent portion, which is connected to the pressure cover 43 through the second connector 441. The side wall of the pressure ring 44 fits against the side wall of the sealing strip 41, so that the pressure ring 44 slides above the sealing strip 41. A cavity for accommodating lubricating medium is formed between the pressure ring 44 and the sealing strip 41. A second sealing groove 442 is opened on the side wall of the pressure ring 44. The second sealing groove 442 is located on the mating surface of the pressure ring 44 and the sealing strip 41. An O-ring is provided in the second sealing groove 442, forming a radial sealing structure 4 on the external gear sleeve 2.

[0046] The O-shaped sealing ring is made of butyronitrile rubber, has good wear resistance, oil resistance, and bonding performance, can be mass-produced, is tailored into a ring according to the size of the sealing groove, and is bonded to the 30° bevel of the interface and is installed on the compression ring 44 and the compression cover 43 to form radial sealing for the sealing strip 41.

[0047] When the first connecting piece 431 and the second connecting piece 441 are bolts, a first bolt hole and a threaded hole are arranged on the compression cover 43, the bolt hole is used for fixing the first connecting piece 431, a gasket is arranged between the bolt of the first connecting piece 431 and the compression cover 43, and the threaded hole is used for fixing the second connecting piece 441; a second bolt hole is arranged on the compression ring 44, the second bolt hole is used for fixing the second connecting piece 441, a gasket is arranged between the bolt of the second connecting piece 441 and the compression ring 44, the second connecting piece 441 passes through the second bolt hole, and the tail is fixed in the threaded hole of the compression ring 44.

[0048] However, the bolt is prone to breakage, so the compression cover 43 is provided with a positioning stop 432, and the compression ring 44 is provided with a positioning ring groove 442, so as to avoid breakage of the bolt due to dynamic shear force.

[0049] Specifically, as shown in Figure 2 The lower end of the compression cover 43 is provided with a protruding positioning stop 432, the positioning stop 432 is matched with the inner tooth shaft sleeve 3 in the form of a stop, the positioning stop 432 is in the form of a step, the inner tooth shaft sleeve 3 is limited, and the two ends of the inner tooth shaft sleeve 3 are attached to the compression cover 43.

[0050] The compression ring 44 is provided with a positioning ring groove 442, the positioning ring groove 442 protrudes outward and is perpendicular to the compression cover 43, and the second connecting piece 441 passes through the positioning ring groove 442 to connect the compression ring 44 and the compression cover 43.

[0051] Through the arrangement of the compression cover 43 and the compression ring 44, breakage of the first connecting piece 431 and the second connecting piece 432 due to shear force is avoided when the shaft coupling swings.

[0052] In actual work, the shaft coupling always swings in the axial and radial directions, when the first connecting piece 431 and the second connecting piece 432 are both bolts, the bolt is prone to deformation and breakage under the action of shear force, so the lower end of the compression cover 43 is provided with a positioning stop 432, when the inner tooth shaft sleeve 3 moves relative to the compression cover 43, the force is buffered through the positioning stop 432; the compression ring 44 is provided with a positioning ring groove 442, so that the extended section of the bolt is fixed and strengthened, when axial or radial swinging occurs, the shear force is buffered through the positioning ring groove 442, the structural strength is improved, and the service life is prolonged.

[0053] The present application changes the lip seal into the rectangular cross-section sealing strip 41 structure, the strength is increased, the hoop 42 is locked outside the seal to ensure the axial seal; the sealing strip 41 two sides are locked by the compression ring 44 containing O-ring and the gland 43 to ensure the radial seal; the sealing strip 41 uses the fluorine rubber more resistant to oil and aging oxidation to ensure the sealing quality, the bevel uses 30° adhesive technology to ensure the sufficient adhesive strength; finally, the axial and radial bidirectional sealing structure is formed by the bolt fastening on the inner ring gear, the main motor coupling can continuously work for more than 12 months without oil leakage, the tooth part is fully lubricated, the on-site maintenance replacement frequency is reduced, the labor and spare part cost are reduced, the sealing strip 41 is convenient and simple to replace, and the continuous online use of the main motor coupling is ensured.

[0054] The present application has been described above, and the description is not limited, and the shown in the drawings is only one of the embodiments of the present application, and the actual structure is not limited. Therefore, if the ordinary skilled in the art is inspired, without departing from the creative purpose of the present application, the similar structure and embodiments are not creatively designed, which should belong to the protection scope of the present application.

Claims

1. A main motor coupling, the coupling (1) is provided with an inner tooth sleeve (3) and an outer tooth sleeve (2) on the outer circle, respectively, a sealing structure (4) is arranged between the inner tooth sleeve (3) and the outer tooth sleeve (2), characterized in that, the sealing structure (4) comprises a first sealing structure (4) comprising a sealing strip (41) sleeved on the outer periphery of the outer tooth sleeve (2), the sealing strip (41) being pressed on the outside of the sealing strip (41) by a fastener (42) to form an axial seal on the outer circle of the outer tooth sleeve (2); and a second sealing structure (4) comprising a gland (43) and a pressing ring (44), the gland (43) being connected with the inner tooth sleeve (3) through a first connecting piece (431), and the pressing ring (44) being connected with the gland (43) through a second connecting piece (441); the second sealing structure (4) is connected with the first sealing structure (4) in sliding mode to achieve dynamic radial sealing. the side wall of the pressing ring (44) is attached to the side wall of the sealing strip (41), so that the pressing ring (44) is connected with the sealing strip (41) in sliding mode, the space above the sealing strip (41) forms a cavity for accommodating lubricating medium together with the pressing ring (44), a second sealing groove (442) is formed on the mating surface of the pressing ring (44) and the sealing strip (41), and an O-shaped sealing ring is arranged in the second sealing groove (442).

2. The main motor coupling of claim 1, wherein, a first sealing groove (433) is formed on the mating surface of the gland (43) and the sealing strip (41), and an O-shaped sealing ring is arranged in the first sealing groove (433).

3. The main motor coupling of claim 2, wherein, a positioning stop (432) is arranged at the lower end of the gland (43), and the positioning stop (432) is matched with the inner tooth sleeve (3) in the form of a stop.

4. The main motor coupling of claim 3, wherein, the pressing ring (44) is provided with a positioning ring groove (442), and the second connecting piece (441) passes through the positioning ring groove (442) to connect the pressing ring (44) and the gland (43).

5. The main motor coupling of claim 4, wherein, the end corner of the outer tooth sleeve (2) near the lower end of the gland (43) is in the form of an arc corner, and a gap is arranged between the arc corner and the outer tooth sleeve (2).

6. The main motor coupling of claim 5, wherein, the fastener (42) is an adjustable fastener (42), a ring groove is formed on the outside of the sealing strip (41) along the length direction of the sealing strip (41), and the fastener (42) is arranged in the ring groove to adjust the tightness of the sealing strip (41).

7. The main motor coupling of claim 6, wherein, the fastener (42) is a clamp, fastening ears are welded at both ends of the clamp, bolt holes are formed on the fastening ears (421), and the tightness of the sealing strip (41) is adjusted by the tightness of the bolt and nut.

8. The main motor coupling of claim 7, wherein, ​ 9. The main motor coupling of claim 8, wherein, The first connecting piece (431) and the second connecting piece (441) are bolts, the cover (43) is provided with a first bolt hole and a threaded hole, the bolt hole is used for fixing the first connecting piece (431), a gasket is arranged between the bolt of the first connecting piece (431) and the cover (43), and the threaded hole is used for fixing the second connecting piece (441); the cover ring (44) is provided with a second bolt hole, the second bolt hole is used for fixing the second connecting piece (441), a gasket is arranged between the bolt of the second connecting piece (441) and the cover ring (44), the second connecting piece (441) passes through the second bolt hole, and the tail is fixed in the threaded hole of the cover ring (44).

10. The main motor coupling of claim 9, wherein, The interface between the sealing strip (41) and the O-shaped sealing ring is bonded by using a 30° bevel.

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