A reducer sealing device and method thereof

Abstract

The present invention provides a reducer sealing device and method thereof, comprising a through cover and a sealing ring for being arranged at the position where a shaft rod protrudes from a reducer housing, the through cover being penetrated by a sealing hole, the shaft rod protruding from the sealing hole, a first sealing area being formed between the inner wall of the through cover and the shaft rod, an annular sealing assembly being further provided on the through cover via a connecting piece, the annular sealing assembly being arranged around the shaft rod, a second sealing area being formed between the inner wall of the annular sealing assembly and the outer wall of the shaft rod, the sealing ring being arranged in the first sealing area or the second sealing area, a beneficial effect of adopting the present invention is that when the original sealing surface of the reducer shaft end is worn, the annular sealing assembly can be used to change the position of the sealing surface, so as to ensure the sealing effect without affecting the sealing effect and without replacing the shaft rod, thereby avoiding frequent replacement of the shaft rod and reducing the production cost.

Description

Technical Field

[0001] The invention relates to the field of mechanical seals, and in particular to a reducer sealing device and a method thereof. Background Art

[0002] The large reducer used in metallurgical casting cranes has been running at high speed in a high temperature and high dust environment for a long time. The input and output shafts of the reducer have been leaking oil to varying degrees for a long time. In the early stage, the oil leakage problem can be solved by replacing the seal. After long-term use, the reducer shaft neck sealing surface has different degrees of wear. Simply replacing a new seal cannot solve the oil leakage problem. The only way is to replace the input and output shafts of the reducer. However, due to the high price of the shaft rod, frequent replacement greatly increases the production cost. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a reducer sealing device and a method thereof, so as to solve the problem of high production cost caused by frequent replacement of shaft rods in the prior art.

[0004] In order to achieve the above-mentioned object and other related objects, the present invention provides a reducer sealing device, comprising:

[0005] A through cover, used for being arranged at the place where the shaft extends out of the reducer housing;

[0006] The through cover is penetrated by a sealing hole, the shaft rod extends out of the sealing hole, and a first sealing area is formed between the inner wall of the through cover and the shaft rod;

[0007] The through cover is also provided with an annular sealing assembly through a connecting piece, the annular sealing assembly is arranged around the shaft, and a second sealing area is formed between the inner wall of the annular sealing assembly and the outer wall of the shaft;

[0008] A sealing ring is arranged in the first sealing area or the second sealing area.

[0009] Optionally, when the original sealing surface of the reducer shaft end is worn, the annular sealing assembly can be used to change the position of the sealing surface to ensure the sealing effect without affecting the sealing effect and replacing the shaft rod, avoiding frequent replacement of the shaft rod and reducing production costs.

[0010] Optionally, the annular sealing assembly includes a sealing ring and a sealing cover, the sealing ring is cylindrical, the sealing cover is annular, one end face of the sealing ring is connected to the through cover, the other end face of the sealing ring is connected to the outer ring edge of the sealing cover, the inner wall of the sealing ring is also provided with an annular mounting groove, the annular mounting groove is connected to the end face of the sealing ring away from the through cover, the sealing ring is arranged in the annular mounting groove, the outer ring of the sealing ring is pressed against the inner wall of the sealing ring, and the inner ring of the sealing ring is pressed against the outer wall of the shaft.

[0011] Optionally, the connecting member is a connecting ring, which is coaxially arranged on the end surface of the sealing ring close to the through cover, the connecting ring is inserted into the sealing hole, and the outer ring of the connecting ring is threadedly connected to the inner wall of the sealing hole.

[0012] Optionally, the connecting ring and the sealing ring are formed integrally.

[0013] Optionally, at least one connecting hole is axially penetrated on the sealing ring, and at least one limiting hole is penetrated on the sealing cover. The limiting holes correspond to the connecting holes one by one, the limiting holes are connected to the corresponding connecting holes, and the connecting holes and the limiting holes are connected by bolts.

[0014] Optionally, the inner ring of the through cover is further provided with a retaining ring, the outer ring edge of the retaining ring is connected to the inner ring edge of the through cover, and the inner ring edge of the retaining ring is close to the outer wall of the shaft.

[0015] Optionally, a mounting hole is penetrated through the reducer housing, and the shaft rod is installed in the mounting hole through a bearing. An adjustment ring is also provided in the mounting hole, and the adjustment ring is located on the outside of the bearing. The outer ring edge of the adjustment ring is connected to the inner wall of the mounting hole, and the inner ring edge of the adjustment ring is close to and fits the outer wall of the shaft rod.

[0016] Optionally, a reducer sealing method includes the reducer sealing device described above, and the method includes the steps of:

[0017] A mounting hole is formed through the wall of the reducer housing, and the shaft is mounted in the mounting hole through a bearing, and the shaft extends out of the mounting hole;

[0018] A through cover is arranged on the mounting hole, a sealing hole is passed through the through cover, the shaft rod extends out of the sealing hole, and a first sealing area is formed between the inner ring edge of the through cover and the shaft rod

[0019] The through cover is also provided with an annular sealing assembly through a connecting piece, the annular sealing assembly is arranged around the shaft, and a second sealing area is formed between the inner ring edge of the annular sealing assembly and the outer wall of the shaft;

[0020] A sealing ring is arranged in the first sealing area for sealing, and when the outer wall of the shaft rod in the first sealing area is worn, a sealing ring is arranged in the second sealing area for sealing again.

[0021] Optionally, when the outer wall of the shaft rod in the second sealing area is worn again, a plurality of the annular sealing assemblies may be provided on the through cover to form a plurality of corresponding sealing areas in the axial direction of the shaft rod for sealing.

[0022] As described above, a reducer sealing device and method of the present invention have the following beneficial effects: when the original sealing surface of the reducer shaft end is worn, the annular sealing assembly can be used to change the position of the sealing surface, thereby ensuring the sealing effect without affecting the sealing effect and without replacing the shaft rod, avoiding frequent replacement of the shaft rod and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic cross-sectional structure diagram of an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A local enlarged view of point X.

[0025] Part Number Description

[0026] 1 Reducer housing

[0027] 1a Adjustment ring

[0028] 2-axis rod

[0029] 3-way cover

[0030] 3a retaining ring

[0031] 4 Sealing ring

[0032] 5 Sealing cover

[0033] 6 Sealing ring DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0035] See also Figure 1 to Figure 2It should be noted that the diagrams provided in the present embodiment only illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than drawing according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0036] Figure 1 to Figure 2 As shown, the present invention provides a reducer sealing device, comprising a through cover 3, which is used to be arranged at the place where the shaft rod 2 extends out of the reducer housing 1;

[0037] The through cover 3 is penetrated by a sealing hole, the shaft rod 2 extends out of the sealing hole, and a first sealing area is formed between the inner wall of the through cover 3 and the shaft rod 2;

[0038] The through cover 3 is also provided with an annular sealing assembly through a connecting piece, and the annular sealing assembly is arranged around the shaft 2, and a second sealing area is formed between the inner wall of the annular sealing assembly and the outer wall of the shaft 2;

[0039] A reducer sealing device further includes a sealing ring 6, and the sealing ring 6 is arranged in the first sealing area or the second sealing area.

[0040] In one embodiment, the annular sealing assembly includes a sealing ring 4 and a sealing cover 5, the sealing ring 4 is cylindrical, the sealing cover 5 is annular, one end face of the sealing ring 4 is connected to the through cover 3, and the other end face of the sealing ring 4 is connected to the outer ring edge of the sealing cover 5. The inner wall of the sealing ring 4 is also provided with an annular mounting groove, and the annular mounting groove is connected to the end face of the sealing ring 4 away from the through cover 3. The sealing ring 6 is arranged in the annular mounting groove, and the outer ring of the sealing ring 6 is pressed against the inner wall of the sealing ring 4, and the inner ring of the sealing ring 6 is pressed against the outer wall of the shaft 2.

[0041] In one embodiment, the connecting member is a connecting ring, which is coaxially arranged on the end surface of the sealing ring 4 close to the through cover 3, and the connecting ring is inserted into the sealing hole, and the outer ring of the connecting ring is threadedly connected to the inner wall of the sealing hole.

[0042] In one embodiment, the connecting ring and the sealing ring 4 are integrally formed.

[0043] In one of the embodiments, at least one connecting hole is axially penetrated on the sealing ring 4, and at least one limiting hole is penetrated on the sealing cover 5. The limiting holes correspond to the connecting holes one by one, the limiting holes are connected with the corresponding connecting holes, and the connecting holes and the limiting holes are connected by bolts.

[0044] In one of the embodiments, at least one first oil return hole is penetrated through the groove wall of the annular mounting groove, and the first oil return hole is connected to the first sealing area.

[0045] In one embodiment, the sealing ring 6 is further provided with an oil return channel, and the oil return channel is connected to the first oil return hole.

[0046] In one embodiment, the inner ring of the through cover 3 is further provided with a retaining ring 3a, the outer ring edge of the retaining ring 3a is connected to the inner ring edge of the through cover 3, and the inner ring edge of the retaining ring 3a is close to the outer wall of the shaft 2.

[0047] In one embodiment, the retaining ring 3a is also penetrated by a second oil return hole, and the second oil return hole is connected to the first oil return hole. The oil along the shaft 2 can flow back through the oil return channel, the first oil return hole and the second oil return hole to avoid oil accumulation.

[0048] In one embodiment, a mounting hole is penetrated on the reducer housing 1, and the shaft rod 2 is installed in the mounting hole through a bearing. An adjusting ring 1a is also provided in the mounting hole. The adjusting ring 1a is located on the outside of the bearing, and the outer ring edge of the adjusting ring 1a is connected to the inner wall of the mounting hole, and the inner ring edge of the adjusting ring 1a is close to and fits the outer wall of the shaft rod 2.

[0049] In one embodiment, a reducer sealing method includes the reducer sealing device described above, and the method includes the steps of:

[0050] A mounting hole is formed through the wall of the reducer housing 1, and the shaft 2 is mounted in the mounting hole through a bearing, and the shaft 2 extends out of the mounting hole;

[0051] A through cover 3 is provided on the mounting hole, and a sealing hole is passed through the through cover 3, and the shaft rod 2 extends out of the sealing hole, and a first sealing area is formed between the inner ring edge of the through cover 3 and the shaft rod 2

[0052] The through cover 3 is also provided with an annular sealing assembly through a connecting piece, and the annular sealing assembly is arranged around the shaft 2, and a second sealing area is formed between the inner ring edge of the annular sealing assembly and the outer wall of the shaft 2;

[0053] A sealing ring 6 is provided in the first sealing area for sealing. When the outer wall of the shaft rod 2 in the first sealing area is worn, a sealing ring 6 is provided in the second sealing area for sealing again.

[0054] In one embodiment, when the outer wall of the shaft rod 2 in the second sealing area is worn again, a plurality of the annular sealing assemblies may be provided on the through cover 3 to form a plurality of corresponding sealing areas in the axial direction of the shaft rod 2 for sealing.

[0055] In one of the embodiments, when the oil in the reducer housing 1 leaks outward along the outer wall of the shaft 2, a seal is set in the first sealing area between the shaft 2 and the through cover 3. During use, the seal will wear against the outer wall of the shaft 2. When the outer wall of the shaft 2 is worn and cannot be sealed, an annular sealing assembly can be set, and a new sealing surface can be set in the axial direction of the shaft 2. At the same time, the oil along the shaft 2 can flow back through the oil return channel, the first oil return hole and the second oil return hole to avoid oil accumulation. After wear occurs, the above operation is repeated, which greatly improves the service life of the shaft 2 and reduces the cost of replacing the shaft 2.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A reducer sealing device, characterized in that: include: A through cover (3) is used to be arranged at the position where the shaft (2) protrudes from the reducer housing (1); The through cover (3) is penetrated by a sealing hole, the shaft rod (2) protrudes from the sealing hole, and a first sealing area is formed between the inner wall of the through cover (3) and the shaft rod (2); An annular sealing component is also provided on the through cover (3) via a connecting piece, the annular sealing component is arranged around the shaft (2), and a second sealing area is formed between the inner wall of the annular sealing component and the outer wall of the shaft (2); A sealing ring (6), the sealing ring (6) being arranged in the first sealing area or the second sealing area; The annular sealing assembly comprises a sealing ring (4) and a sealing stop cover (5), wherein the sealing ring (4) is cylindrical, and the sealing stop cover (5) is annular, one end face of the sealing ring (4) is connected to the through cover (3), and the other end face of the sealing ring (4) is connected to the outer ring edge of the sealing stop cover (5), the inner wall of the sealing ring (4) is further provided with an annular mounting groove, and the annular mounting groove is connected to the end face of the sealing ring (4) away from the through cover (3), and the sealing ring (6) is arranged in the annular mounting groove, the outer ring of the sealing ring (6) is tightly abutted against the inner wall of the sealing ring (4), and the inner ring of the sealing ring (6) is tightly abutted against the outer wall of the shaft (2); The connecting member is a connecting ring, which is coaxially arranged on the end surface of the sealing ring (4) close to the through cover (3), and the connecting ring is inserted into the sealing hole, and the outer ring of the connecting ring is threadedly connected to the inner wall of the sealing hole.

2. A reducer sealing device according to claim 1, characterized in that: The connecting ring and the sealing ring (4) are integrally formed.

3. A reducer sealing device according to claim 2, characterized in that: The sealing ring (4) is also axially penetrated by at least one connecting hole, and the sealing cover (5) is also penetrated by at least one limiting hole, the limiting holes correspond to the connecting holes one by one, the limiting holes are connected to the corresponding connecting holes, and the connecting holes and the limiting holes are connected by bolts.

4. A reducer sealing device according to claim 3, characterized in that: The inner ring of the through cover (3) is also provided with a retaining ring (3a), the outer ring edge of the retaining ring (3a) is connected to the inner ring edge of the through cover (3), and the inner ring edge of the retaining ring (3a) is close to the outer wall of the shaft (2).

5. A reducer sealing device according to claim 4, characterized in that: The reducer housing (1) is provided with a mounting hole, the shaft (2) is mounted in the mounting hole via a bearing, an adjustment ring (1a) is also provided in the mounting hole, the adjustment ring (1a) is located outside the bearing, the outer ring edge of the adjustment ring (1a) is connected to the inner wall of the mounting hole, and the inner ring edge of the adjustment ring (1a) is close to and fits the outer wall of the shaft (2).

6. A reducer sealing method, characterized in that: The reducer sealing device according to any one of claims 1 to 5, wherein the method comprises the steps of: A mounting hole is formed through the wall of the reducer housing (1), and the shaft rod (2) is mounted in the mounting hole via a bearing, and the shaft rod (2) protrudes out of the mounting hole; A through cover (3) is arranged on the mounting hole, a sealing hole is passed through the through cover (3), the shaft rod (2) extends out of the sealing hole, and a first sealing area is formed between the inner ring edge of the through cover (3) and the shaft rod (2) An annular sealing component is also provided on the through cover (3) via a connecting piece, the annular sealing component is arranged around the shaft (2), and a second sealing area is formed between the inner ring edge of the annular sealing component and the outer wall of the shaft (2); A sealing ring (6) is arranged in the first sealing area for sealing, and when the outer wall of the shaft rod (2) in the first sealing area is worn, a sealing ring (6) is arranged in the second sealing area for sealing again.

7. A reducer sealing method according to claim 6, characterized in that: When the outer wall of the shaft rod (2) in the second sealing area is worn again, a plurality of the annular sealing assemblies may be arranged on the through cover (3) to form a plurality of corresponding sealing areas in the axial direction of the shaft rod (2) for sealing.

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