CN220227820U - Sealing structure for heading machine and heading machine - Google Patents
Sealing structure for heading machine and heading machine Download PDFInfo
- Publication number
- CN220227820U CN220227820U CN202321825023.7U CN202321825023U CN220227820U CN 220227820 U CN220227820 U CN 220227820U CN 202321825023 U CN202321825023 U CN 202321825023U CN 220227820 U CN220227820 U CN 220227820U
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- sealing
- drainage
- heading machine
- seal
- cavity
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- 238000007789 sealing Methods 0.000 title claims abstract description 179
- 239000004519 grease Substances 0.000 claims abstract description 47
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 18
- 230000005641 tunneling Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model relates to a sealing structure for a heading machine and the heading machine, wherein the sealing structure for the heading machine comprises at least one drainage cavity channel, the drainage cavity channel at least comprises a first drainage part, a shrinkage part and a second drainage part which are sequentially communicated, the shrinkage part is communicated with a grease outlet of the sealing cavity channel, an outer drainage port is arranged on the second drainage part, and the flow area of the first drainage part and the flow area of the second drainage part are larger than the flow area of the shrinkage part; when the medium sequentially flows through the first drainage part, the shrinkage part and the second drainage part, a vacuum or low-pressure area is formed at the shrinkage part and/or a position close to the shrinkage part, so that the sealing grease in the sealing cavity is provided with a suction force for discharging the grease from the grease outlet of the sealing cavity. The utility model solves the technical problems that the sealing system of the tunneling machine is easy to fail and the sealing effect is poor.
Description
Technical Field
The utility model relates to the technical field of tunnel construction, in particular to a sealing structure for a heading machine and the heading machine.
Background
Tunnel boring machines are currently widely used in the field of underground space construction and tunnel construction. In the construction process, the cutterhead and other parts rotate, and in order to avoid contact with external dust and the like, a sealing system (such as a main driving seal, a hinged seal, a shield tail seal and the like of the heading machine) is required to be arranged between the two relatively moving parts, and plays a vital role in normal operation of the heading machine, so that the performance of the heading machine is directly determined.
Taking the main driving inner seal as an example, the sealing mode adopted at present takes a lip type sealing structure as the main part, and grease with certain pressure is continuously injected into an oil duct formed between the inner ring lip type seal and the outer ring lip type seal through an electric pump, so that redundant grease in the oil duct is continuously extruded outwards from an opening of the oil duct, and the sealing effect is achieved. However, in the construction site at present, the sealing system has the problems of frequent faults and poor sealing effect, so that the site construction quality and the process are seriously influenced, even the main driving bearing and other parts of the heading machine are damaged, the service life of equipment is seriously influenced, and huge economic loss is caused.
Aiming at the problems that a sealing system of a tunneling machine in the related art is easy to fail and has poor sealing effect, no effective solution is provided at present.
Therefore, the inventor provides a sealing structure for a heading machine and the heading machine by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The utility model aims to provide a sealing structure for a heading machine and the heading machine, which can improve the sealing capability of the sealing structure of the heading machine, achieve a better sealing effect and further improve the reliability of the heading machine.
The object of the utility model can be achieved by the following scheme:
the utility model provides a sealing structure for a heading machine, which is used for sealing a sealing cavity in the heading machine, and comprises the following components:
the drainage cavity channel at least comprises a first drainage part, a shrinkage part and a second drainage part which are sequentially communicated, the shrinkage part is communicated with the grease outlet of the sealing cavity channel, the second drainage part is provided with an outer discharge port, and the flow area of the first drainage part and the flow area of the second drainage part are larger than the flow area of the shrinkage part;
when the medium sequentially flows through the first drainage part, the shrinkage part and the second drainage part, a vacuum or low-pressure area is formed at the shrinkage part and/or a position close to the shrinkage part, so that a suction force for discharging the sealed grease in the sealed cavity is provided for the grease outlet of the sealed cavity.
In a preferred embodiment of the present utility model, the sealing channel is an annular channel formed between a sealing track and a shield body of the heading machine, and the drainage channel is an annular channel arranged along a circumferential direction of the sealing channel and communicated with the grease outlet.
In a preferred embodiment of the present utility model, the sealing channel is an annular channel formed between a sealing track and a shield body of the heading machine, the number of the drainage channels is a plurality of the drainage channels, and the plurality of the drainage channels are arc-shaped channels which are arranged at intervals along the circumferential direction of the sealing channel and are respectively communicated with the grease outlet.
In a preferred embodiment of the present utility model, a sealing pressure ring for pressing and fixing the sealing component in the sealing cavity is disposed at the grease outlet of the sealing cavity, the sealing pressure ring is connected to the shield body, the first drainage portion and the second drainage portion are respectively located on the sealing pressure ring and the sealing runway, and the necking portion is formed at a position where the sealing pressure ring is connected to the sealing runway.
In a preferred embodiment of the present utility model, the sealing assembly includes a plurality of lip-shaped sealing rings, the plurality of lip-shaped sealing rings are disposed in the sealing cavity along the axial direction of the sealing cavity, a sealing spacer ring is pressed between two adjacent lip-shaped sealing rings, and the sealing compression ring presses the lip-shaped sealing rings close to the grease outlet.
In a preferred embodiment of the utility model, the sealing track is connected to a drive disc of the heading machine.
In a preferred embodiment of the utility model, the sealing track is screwed to the drive disk.
In a preferred embodiment of the present utility model, the medium is a fluid flowing through the first drainage portion.
In a preferred embodiment of the utility model, the medium is a gas or a liquid.
The utility model provides a heading machine, which comprises a shield body, a sealing runway and the sealing structure for the heading machine, wherein a sealing cavity is formed between the shield body and the sealing runway, and the sealing structure for the heading machine is arranged outside the sealing cavity and is communicated with a grease outlet of the sealing cavity.
From the above, the sealing structure for the heading machine and the heading characteristics and advantages of the utility model are that: the sealing cavity is characterized in that a drainage cavity is arranged outside the sealing cavity, wherein the drainage cavity at least comprises a first drainage part, a shrinkage part and a second drainage part which are sequentially communicated, the shrinkage part is communicated with a grease outlet of the sealing cavity, the overflow area of the first drainage part and the overflow area of the second drainage part are larger than those of the shrinkage part, when a medium sequentially flows through the first drainage part, the shrinkage part and the second drainage part, venturi effect can be generated at the shrinkage part and/or the position close to the shrinkage part, so that a vacuum or low-pressure area can be formed at the shrinkage part and/or the position close to the shrinkage part, and suction force for discharging grease outside the sealing cavity is provided for sealing grease outside the sealing cavity, so that the sealing of the sealing cavity is facilitated, and the sealing effect on the sealing cavity is improved; in addition, when the medium is discharged from the outer discharge port on the second drainage part, a barrier preventing external impurities from entering can be formed, so that the external impurities are effectively prevented from entering the sealing cavity, and the sealing effect of the sealing cavity is further improved.
Drawings
The following drawings are only for purposes of illustration and explanation of the present utility model and are not intended to limit the scope of the utility model. Wherein:
fig. 1: the utility model discloses a position schematic diagram of a sealing structure for a heading machine.
Fig. 2: the utility model relates to a cross-section view of a sealing structure for a heading machine.
Fig. 3: an enlarged view of part of the a position in fig. 2.
Fig. 4: an enlarged view of a portion of the drainage channel location in fig. 3 is shown.
Fig. 5: is a working schematic diagram of the drainage channel in the utility model.
The reference numerals in the utility model are:
1. a drainage channel; 101. A first drainage portion;
102. a pinch portion; 103. A second drainage portion;
104. an outer discharge port; 2. Sealing the cavity;
201. a grease outlet; 3. Sealing the runway;
4. a shield body; 5. A drive plate;
6. sealing compression rings; 7. Lip-type sealing ring;
8. and sealing the spacer ring.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present utility model, a specific embodiment of the present utility model will be described with reference to the accompanying drawings.
As shown in fig. 5, the present utility model adopts the venturi effect principle that fluid enters from the a position, when the fluid passes through the narrow opening B position, the flow velocity of the fluid increases at the narrow opening B position, and a partial vacuum area or a low pressure area is formed at the D position or the position where B and D meet, and the fluid at the D position is sucked to the C position due to the effect of the pressure difference.
Embodiment one
As shown in fig. 1 to 4, the present utility model provides a sealing structure for a heading machine for sealing a seal cavity 2 in a heading machine. The sealing structure for the heading machine comprises at least one drainage cavity channel 1, wherein the drainage cavity channel 1 at least comprises a first drainage part 101, a shrinkage part 102 and a second drainage part 103 which are sequentially communicated, the shrinkage part 102 is communicated with a grease outlet 201 of the sealing cavity channel 2, an outer drainage port 104 is arranged on the second drainage part 103, and the overflow area of the first drainage part 101 (namely, the area of the cross section of the first drainage part 101, through which a medium can pass) and the overflow area of the second drainage part 103 (namely, the area of the cross section of the second drainage part 103, through which the medium can pass) are larger than the overflow area of the shrinkage part 102 (namely, the area of the cross section of the shrinkage part 102, through which the medium can pass) are formed; as the medium flows through the first drain 101, the pinch 102 and the second drain 103 in this order, a vacuum or low pressure region (which is a region having a pressure smaller than the pressure in the seal chamber 2) is formed at the pinch 102 and/or near the pinch 102 to provide a suction force to the seal grease in the seal chamber 2 by the grease outlet 201 of the seal chamber 2.
In the utility model, a drainage cavity channel 1 is arranged outside a sealing cavity channel 2, wherein the drainage cavity channel 1 at least comprises a first drainage part 101, a shrinkage part 102 and a second drainage part 103 which are sequentially communicated, and as the overflow area of the first drainage part 101 and the overflow area of the second drainage part 103 are larger than the overflow area of the shrinkage part 102, when a medium sequentially flows through the first drainage part 101, the shrinkage part 102 and the second drainage part 103, a Venturi effect can be generated at the shrinkage part 102 and/or the position close to the shrinkage part 102, so that a vacuum or low-pressure area can be formed at the shrinkage part 102 and/or the position close to the shrinkage part 102, and the pumping force of the sealing grease in the sealing cavity channel 2 is provided by the grease outlet 201 of the sealing cavity channel 2, the outer discharge of the sealing grease in the sealing cavity channel 2 is facilitated, and the sealing effect on the sealing cavity channel 2 is improved; in addition, when the medium is discharged from the outer discharge port 104 on the second drainage portion 103, a barrier preventing external impurities from entering can be formed, so that the external impurities can be effectively prevented from entering the sealing cavity 2, and the sealing effect of the sealing cavity 2 is further improved. Because drainage cavity way 1 provides the suction to sealed grease, in actual working process, can still guarantee not to have impurity to get into in the sealed cavity way 2 under the circumstances of reducing sealed grease injection quantity, not only guarantee good sealed effect, can reduce construction cost moreover, have better economic nature.
Further, the medium is fluid flowing through the first drainage portion 101. Wherein the medium may be, but is not limited to, a gas or a liquid. The medium can be high-pressure air sprayed outwards, so that impurities such as dregs and dust are prevented from entering the sealed cavity 2, and the sealed cavity 2 has the advantages of being simple and convenient to obtain air and low in cost, of course, the medium can also be water, other fluids such as grease and the like, and when the medium is discharged from the outer discharge port 104 on the second drainage part 103, a barrier preventing external impurities from entering can be formed, and the external impurities are prevented from entering the sealed cavity 2.
In an alternative embodiment of the utility model, the sealing channel 2 is an annular channel formed between the sealing track 3 and the shield body 4 of the heading machine, the number of the drainage channels 1 is one, and the drainage channels 1 are one annular channel which is arranged along the circumferential direction of the sealing channel 2 and is communicated with the grease outlet 201.
In another alternative embodiment of the utility model, the sealing cavity channel 2 is an annular cavity channel formed between the sealing track 3 and the shield body 4 of the heading machine, the number of the drainage cavity channels 1 is multiple, the plurality of the drainage cavity channels 1 are arc-shaped cavity channels which are arranged at intervals along the circumferential direction of the sealing cavity channel 2 and are respectively communicated with the grease outlet 201, and compared with integral control, the structure of the drainage cavity channel 1 can be divided into blocks and areas to provide different suction forces for sealing grease in the sealing cavity channel 2 at different positions, so that the sealing grease sealing device is suitable for pressure conditions of different areas.
Specifically, as shown in fig. 1 to 4, a sealing pressure ring 6 for pressing and fixing a sealing assembly in the sealing cavity 2 is provided at the grease outlet 201 of the sealing cavity 2, the sealing pressure ring 6 is connected to the shield body 4, the first drainage portion 101 is located on an inner wall surface of the sealing pressure ring 6, the second drainage portion 103 is located on an outer wall surface of the sealing track 3, and the necking portion 102 is formed at a position where the sealing pressure ring 6 is in contact with the sealing track 3 (at least a part of the necking portion 102 is located on the inner wall surface of the sealing pressure ring 6 and is in communication with the first drainage portion 101, and at least a part of the necking portion 102 is located on an outer wall surface of the sealing track 3 and is in communication with the second drainage portion 103).
Further, as shown in fig. 3 and 4, the sealing assembly includes a plurality of lip-shaped sealing rings 7, the plurality of lip-shaped sealing rings 7 are axially arranged in the sealing cavity 2, a sealing spacer ring 8 is pressed between two adjacent lip-shaped sealing rings 7, and the sealing compression ring 6 presses the lip-shaped sealing rings 7 close to the grease outlet 201.
In an alternative embodiment of the utility model, as shown in fig. 1 and 2, the sealing track 3 is connected to a driving disc 5 of the heading machine, and the sealing track 3 can be rotated by the driving disc 5.
Further, the sealing runway 3 and the driving disk 5 are fixed by screw connection through screws.
In the present utility model, the structures of the sealing track 3, the shield body 4, the driving disc 5, the sealing compression ring 6, and other components, as well as the connection relationship and the positional relationship between the components are all existing structures, and are not described herein.
The drainage channel 1 is not only suitable for an inner sealing structure of a main drive of a development machine, but also suitable for an outer sealing structure or a hinge structure of the development machine.
The sealing structure for the heading machine has the characteristics and advantages that:
1. in this sealing structure for entry driving machine, through the setting of drainage chamber way 1, can provide the pumping force that carries out the outer row by the grease export 201 of sealing chamber way 2 to the sealed grease in the sealing chamber way 2, help sealing chamber say 2 the outer row of sealed grease, improve the sealed effect to sealing chamber way 2.
2. In the sealing structure for the heading machine, when the medium is discharged from the outer discharge port 104 on the second drainage part 103 of the sealing cavity 2, a barrier (such as an air curtain formed by air injection) for preventing external impurities from entering can be formed, so that the external impurities can be effectively prevented from entering the sealing cavity 2, and the sealing effect of the sealing cavity 2 is further improved.
3. In this seal structure for entry driving machine, because drainage chamber say 1 provides the suction power to sealed grease, in actual working process, can still guarantee not to have impurity to enter into in the sealed chamber say 2 under the circumstances of reducing sealed grease injection quantity, not only guarantee good sealed effect, can reduce construction cost moreover, have better economic nature.
4. The sealing structure for the heading machine can be regarded as a sealing structure externally added on the traditional sealing structure of the heading machine, cannot influence the traditional sealing structure of the original heading machine, is easy to realize, and has strong applicability.
Second embodiment
The utility model provides a heading machine, which comprises a shield body 4, a sealing runway 3 and the sealing structure for the heading machine, wherein an annular sealing cavity 2 is formed between the shield body 4 and the sealing runway 3, and the sealing structure for the heading machine is arranged outside the sealing cavity 2 and is communicated with a grease outlet 201 of the sealing cavity 2.
The heading machine has the characteristics and advantages of the sealing structure for the heading machine, and the description is omitted herein.
The foregoing is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this utility model, and are intended to be within the scope of this utility model.
Claims (10)
1. The utility model provides a seal structure for entry driving machine, its is arranged in sealing the sealed chamber way in the entry driving machine, its characterized in that, seal structure for entry driving machine includes:
the drainage cavity channel at least comprises a first drainage part, a shrinkage part and a second drainage part which are sequentially communicated, the shrinkage part is communicated with the grease outlet of the sealing cavity channel, the second drainage part is provided with an outer discharge port, and the flow area of the first drainage part and the flow area of the second drainage part are larger than the flow area of the shrinkage part;
when the medium sequentially flows through the first drainage part, the shrinkage part and the second drainage part, a vacuum or low-pressure area is formed at the shrinkage part and/or a position close to the shrinkage part, so that a suction force for discharging the sealed grease in the sealed cavity is provided for the grease outlet of the sealed cavity.
2. The seal structure for a heading machine according to claim 1, wherein the seal channel is an annular channel formed between a seal runway and a shield body of the heading machine, and the drainage channel is an annular channel which is provided along a circumferential direction of the seal channel and is communicated with the grease outlet.
3. The seal structure for a heading machine according to claim 1, wherein the seal channels are annular channels formed between a seal runway and a shield body of the heading machine, the number of the drainage channels is plural, and the plurality of the drainage channels are arc-shaped channels which are arranged at intervals along the circumferential direction of the seal channels and are respectively communicated with the grease outlets.
4. A sealing structure for a heading machine as claimed in claim 2 or claim 3 wherein a sealing collar for pressing and fixing a sealing assembly in the sealing channel is provided at a grease outlet of the sealing channel, the sealing collar is connected to the shield body, the first and second drainage portions are located on the sealing collar and the sealing track respectively, and the necking portion is formed at a position where the sealing collar meets the sealing track.
5. The seal structure for a heading machine according to claim 4, wherein the seal assembly comprises a plurality of lip-shaped seal rings, the lip-shaped seal rings are axially arranged in the seal cavity, a seal spacer ring is pressed between two adjacent lip-shaped seal rings, and the seal compression ring presses the lip-shaped seal rings close to the grease outlet.
6. A sealing arrangement for a heading machine as claimed in claim 2 or claim 3 wherein the sealing track is connected to a drive disc of the heading machine.
7. A sealing structure for a heading machine as claimed in claim 6 wherein said sealing track is screw-connected to said drive disc.
8. A seal arrangement for a heading machine as claimed in claim 1 wherein said medium is fluid flowing through said first drain.
9. A seal arrangement for a heading machine as claimed in claim 8 wherein the medium is a gas or a liquid.
10. A heading machine, characterized in that the heading machine comprises a shield body, a sealing runway and the sealing structure for the heading machine according to any one of claims 1 to 9, a sealing cavity is formed between the shield body and the sealing runway, and the sealing structure for the heading machine is arranged outside the sealing cavity and is communicated with a grease outlet of the sealing cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321825023.7U CN220227820U (en) | 2023-07-12 | 2023-07-12 | Sealing structure for heading machine and heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321825023.7U CN220227820U (en) | 2023-07-12 | 2023-07-12 | Sealing structure for heading machine and heading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220227820U true CN220227820U (en) | 2023-12-22 |
Family
ID=89173911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321825023.7U Active CN220227820U (en) | 2023-07-12 | 2023-07-12 | Sealing structure for heading machine and heading machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220227820U (en) |
-
2023
- 2023-07-12 CN CN202321825023.7U patent/CN220227820U/en active Active
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