CN209855797U - Inserted hob for large-diameter shield machine - Google Patents
Inserted hob for large-diameter shield machine Download PDFInfo
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- CN209855797U CN209855797U CN201920682757.1U CN201920682757U CN209855797U CN 209855797 U CN209855797 U CN 209855797U CN 201920682757 U CN201920682757 U CN 201920682757U CN 209855797 U CN209855797 U CN 209855797U
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Abstract
The utility model provides a major diameter shield constructs machine inserted tooth hobbing cutter to solve current integral type twolip hobbing cutter and not be applicable to wearing and tearing fast, the high technical problem of spoilage when bad stratum operating modes such as full section hard rock, soft upper and lower hard stratum, fault broken zone. The cutter comprises a cutter body, a retainer ring and an alloy cutter ring with embedded teeth; the retainer ring is detachably arranged on the cutter body so that a tooth-inlaid alloy cutter ring limiting groove is formed in the cutter body, and the tooth-inlaid alloy cutter ring is arranged in the tooth-inlaid alloy cutter ring limiting groove and fixed with the cutter body; the inserted-tooth alloy cutter ring is a two-edge inserted-tooth cutter ring or a multi-edge inserted-tooth cutter ring, and the inserted-tooth alloy cutter ring is provided with a wear-resistant surfacing body at the joint of the cutter body, the side surface of the inserted-tooth alloy cutter ring, the joint of the inserted-tooth alloy cutter ring and the check ring, and the joint of the check ring and the cutter body. The distance between two adjacent inserted tooth cutter rings is not easy to exceed the normal use range, and the damage rate is low; the wear rate of the edge tool position is low.
Description
Technical Field
The utility model relates to a shield constructs machine hobbing cutter technical field, concretely relates to major diameter shield constructs machine inserted tooth hobbing cutter.
Background
The hob can be divided into a disc hob, a spherical hob, a wedge hob and the like, the disc hob mainly comprises a cutter ring, a cutter body, a cutter shaft, a bearing, a seal and the like, and the cutter ring is disc-shaped.
The large-diameter shield tunneling machine is a shield tunneling machine with the maximum excavation diameter larger than or equal to 11m, and the hob of the large-diameter shield tunneling machine is different from the hob of a non-large-diameter shield tunneling machine in that: high impact toughness, high wear resistance and high water pressure resistance. In the working conditions of tunneling full-section hard rock, upper soft and lower hard strata and fault fracture zone by using the large-diameter shield tunneling machine with a certain type, the hob at the middle cutter position of the cutter head is easy to be abnormally damaged, and the damage rate accounts for more than 7.75% of the number of the hob of the cutter head; the hob at the edge of the cutterhead has high abrasion speed, and the excavation diameter can not be guaranteed to meet the use requirement when the number of used rings reaches 30-40 m.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a major diameter shield constructs machine inserted tooth hobbing cutter to solve the hobbing cutter of current major diameter shield and construct machine and wear fast, the high technical problem of spoilage when being applied to bad stratum operating modes such as full section hard rock, soft upper and lower hard stratum, fault broken zone.
In order to solve the technical problem, the utility model adopts the following technical scheme:
designing a large-diameter inserted hob for a shield machine, which comprises a hob body, a retaining ring and an inserted alloy hob ring; the retainer ring is detachably arranged on the cutter body so that a tooth-inlaid alloy cutter ring limiting groove is formed in the cutter body, and the tooth-inlaid alloy cutter ring is arranged in the tooth-inlaid alloy cutter ring limiting groove and fixed with the cutter body; the inserted-tooth alloy cutter ring is a two-edge inserted-tooth cutter ring or a multi-edge inserted-tooth cutter ring, and the inserted-tooth alloy cutter ring is provided with a wear-resistant surfacing body at the joint of the cutter body, the side surface of the inserted-tooth alloy cutter ring, the joint of the inserted-tooth alloy cutter ring and the check ring, and the joint of the check ring and the cutter body.
The cutter body is arranged on the cutter shaft through the sealing bearing, and the pressure balancing device is arranged on the sealing bearing or the cutter shaft and is used for balancing the oil pressure in the sealing bearing and the oil pressure outside the sealing bearing. By adopting the pressure balancing device, the large-diameter shield machine inserted hob can bear larger water pressure.
Further, the pressure balancing device comprises a sealing piston, a shaft hole is formed in the cutter shaft, the shaft hole is communicated with the sealing bearing, and the sealing piston is installed in the shaft hole.
Preferably, the distance between the tooth tip of the cutting tooth of the inserted alloy cutter ring and the surface of the hardfacing body is 56-60 mm.
Preferably, the inserted alloy cutter ring is in interference fit with the cutter body.
Preferably, the inserted tooth alloy cutter ring has two pairs, and each pair of inserted tooth alloy cutter rings has one circle of inserted tooth cutter rings so as to form a split type double-edge inserted tooth hob.
Compared with the prior art, the beneficial effects of the utility model are that: the inserted tooth alloy cutter ring is adopted, the inserted tooth blade surface is not easy to wear, the distance between two adjacent inserted tooth cutter rings is not easy to exceed the normal use range, and the damage rate is low; the wear-resistant surfacing body arranged on the cutting face of the inserted hob for the large-diameter shield machine can reduce the wear speed and enhance the strength of the inserted hob for the large-diameter shield machine.
Drawings
Fig. 1 is a cross-sectional view of an embodiment 1 of an inserted hob for a large-diameter shield machine according to the present invention, in which a bearing is not shown.
FIG. 2 is a side view of an insert alloy cutter ring with a partially hardfacing in white frame.
FIG. 3 is a side view of the hardfacing body of FIG. 2 with lines drawn in dotted lines to show the location of the outer contours of portions of the hardfacing body of FIG. 2.
In the figure, 1-cutter shaft, 11-hoisting threaded hole, 12-shaft hole, 21-seal, 22-seal inner space, 3-cutter body, 31-step shoulder, 32-annular clamping groove, 4-inserted alloy cutter ring, 41-cutter ring, 42-cutting tooth, 5-retainer ring, 6-wear-resistant surfacing body and 7-pressure balancing device.
Detailed Description
The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way.
Example 1: a large-diameter shield constructs machine and inlays the tooth hobbing cutter, refer to fig. 1, including arbor 1, sealed bearing, cutter body 3, retaining ring 5 and inlaying the tooth alloy cutter ring 4; the sealed uranium sheath includes a bearing and a seal 21.
The retainer ring 1 is detachably mounted on the cutter body 3, so that a tooth-inlaid alloy cutter ring limiting groove is formed on the cutter body 3. Generally, a stepped shoulder 31 is arranged on one side of the cutter body 3, an annular clamping groove 32 is arranged on the other side of the cutter body 3, and the retainer ring 4 can be formed by splicing two semi-annular bodies. Therefore, the retainer ring 4 is detachably arranged in the annular clamping groove 32 to form a tooth-inlaid alloy cutter ring limiting groove.
The inserted tooth alloy cutter ring 4 is arranged in the inserted tooth alloy cutter ring limiting groove and fixed with the cutter body 3 together; specifically, the alloy cutter ring with the inserted teeth 4 is 482.6mm in outer diameter and comprises a cutter ring and cutting teeth, the height of each cutting tooth is 35mm, the cutting teeth are arranged on the periphery of the cutter ring and welded with the cutter ring, and at least one circle of cutting teeth are welded on the cutter ring in the axial direction of the cutter ring to form at least one-edge inserted tooth cutter ring. When the combined type double-edge inserted tooth cutter ring is used, a double-edge inserted tooth cutter ring or a multi-edge inserted tooth cutter ring can be formed by combining one-edge inserted tooth cutter ring with a corresponding number of pairs, and cutting teeth with corresponding number of turns can be welded on the axial direction of the cutter ring to form the double-edge inserted tooth cutter ring or the multi-edge inserted tooth cutter ring. For example, the large-diameter shield machine inserted hob in this embodiment has two sets of inserted alloy cutter rings, and each set of inserted alloy cutter ring has one ring of inserted cutter ring to form a split-type double-edged inserted hob, so that the inserted cutter rings can be recycled to reduce the cost.
The wear-resistant surfacing bodies 6 are arranged at the joints of the inserted alloy cutter ring 4 and the cutter body 3, the side surfaces of the inserted alloy cutter ring 4, the joints of the inserted alloy cutter ring 4 and the retainer ring 5 and the joints of the retainer ring 5 and the cutter body 3, namely, when the large-diameter shield machine works, except that the tooth tips of the cutting teeth 42 of the inserted alloy cutter ring 4 need to be exposed (see fig. 2-3 in particular), the cutting surfaces (including the tooth roots of the inserted alloy cutter ring 4) which can be in contact with the cut body are all provided with the wear-resistant surfacing bodies 6, and the wear-resistant surfacing bodies 6 are formed by welding wear-resistant welding materials on the cutting surfaces (including the tooth roots of the inserted alloy cutter ring 4). Thus, the retainer ring 4 formed by splicing the two semi-annular bodies can be fixed in the annular clamping groove 32.
Not using the utility model discloses a large diameter shield constructs machine before the inserted tooth hobbing cutter, uses large diameter shield to construct machine excavation tunnel, under the condition of guaranteeing sword interval 100mm and excavation efficiency, the cutter spoilage reaches 7.75%, and cutter damage position mainly concentrates on 14-20 sword positions, and cutter wearing and tearing big position mainly concentrates on 57-68 sword positions, uses the ring number just can't guarantee the excavation diameter when 20-30 rings. After the large-diameter shield machine inserted hob is installed on the large-diameter shield machine, the same-geological tunnel is continuously excavated, and effect evaluation is carried out by using the normal use standard of the same specification, wherein the number of the normally used rings of the large-diameter shield machine inserted hob at the cutter position No. 14-20 is between 100 and 160 rings, and the number of the normally used rings of the large-diameter shield machine inserted hob at the cutter position No. 57-68 is between 45 and 70 rings.
Preferably, the insert ring 4 is in interference fit with the cutter body 3. During installation, the cutter ring 41 can be heated at 200 ℃ for 150 minutes, then the cutter ring 41 is quickly installed on the cutter body 3, and after the cutter ring 41 is cooled, the cutting teeth 42 are welded on the cutter ring 41, as shown in fig. 2-3, preferably, the distance between the tooth tip of the cutting teeth 42 of the insert alloy cutter ring 4 and the surface of the hardfacing body 6 is 56 mm-60 mm.
Example 2: a large-diameter shield constructs machine and inlays the tooth hobbing cutter, refer to fig. 1, including arbor 1, sealed bearing, cutter body 3, retaining ring 5 and inlaying the tooth alloy cutter ring 4; the sealed uranium is equipped with a bearing and a seal 21, and as a further improvement of embodiment 1, the sealed uranium is further equipped with a pressure balance device 7, the cutter body 3 is mounted on the cutter shaft 1 through the sealed bearing, and the pressure balance device 7 is mounted on the sealed bearing or the cutter shaft 1 and is used for balancing the oil pressure in the sealed bearing and the oil pressure outside the sealed bearing. By adopting the pressure balancing device, the large-diameter shield machine inserted hob can bear larger water pressure.
Preferably, the pressure balancing device 7 comprises a sealing piston, and the sealing piston is structured such that a positioning groove is formed in the circumferential direction of the piston, the rubber ring is sleeved in the positioning groove of the piston, and the outer diameter of the rubber ring is larger than that of the piston. A shaft hole 12 is arranged in the cutter shaft 1, the shaft hole 12 is communicated with a sealing inner space 22 of a sealing bearing, and a sealing piston is arranged in the shaft hole 12.
After the cutter shaft 1 is installed in a cutter holder of a large-diameter shield machine, special oil is filled into a hob through a hob oil filling hole, a piston is installed inside the cutter shaft after the fixed amount of oil is filled, at the moment, air inside the hob is removed, the piston is slowly filled with the oil, and the position of the piston is fixed. At the moment, the oil filling hole is closed, and a certain height exists between the top thread sleeves at the position of the piston, so that the pressure balance in the pressure process inside the hob is met. (Note: guarantee the rubber seal arranged on the piston must be intact, the cooperation between the piston and the cutter shaft)
The large-diameter shield constructs the machine and bears 100 meters deep water pressure at most, with the present hobbing cutter of large-diameter shield constructs machine replacement of certain large-diameter shield and constructs the quick-witted current hobbing cutter of machine of big diameter shield of this embodiment, can excavate in 78 meters water pressure's full section hard rock, soft upper and lower hard stratum, broken area stratum of fault, can keep hobbing cutter internal pressure and outside muddy water pressure balance, prevent that the hobbing cutter from because of sealed inefficacy, hobbing cutter chamber leaks oil and advances silt and the hobbing cutter bearing damages, finally lead to the unable spin fracture of hobbing cutter to scrap.
The present invention has been described in detail with reference to the accompanying drawings and embodiments, but those skilled in the art will understand that various specific parameters in the above embodiments can be changed without departing from the spirit of the present invention to form a plurality of specific embodiments, which are the common variation ranges of the present invention and will not be described in detail herein.
Claims (6)
1. A large-diameter shield constructs machine and inlays the tooth hobbing cutter, including cutter body and retaining ring, the said retaining ring is mounted on said cutter body removably, so as to make the said cutter body form and inlay the tooth alloy cutter ring spacing groove, characterized by, also include and inlay the tooth alloy cutter ring; the inserted alloy cutter ring is arranged in the inserted alloy cutter ring limiting groove and is fixed with the cutter body; the inserted-tooth alloy cutter ring is a two-edge inserted-tooth cutter ring or a multi-edge inserted-tooth cutter ring, and the inserted-tooth alloy cutter ring is provided with a wear-resistant surfacing body at the joint of the cutter body, the side surface of the inserted-tooth alloy cutter ring, the joint of the inserted-tooth alloy cutter ring and the check ring, and the joint of the check ring and the cutter body.
2. The inserted hob for a large-diameter shield tunneling machine according to claim 1, further comprising a cutter shaft, a seal bearing, and a pressure balancing device, wherein the cutter body is mounted on the cutter shaft through the seal bearing, and the pressure balancing device is mounted on the seal bearing or the cutter shaft, and is configured to balance an oil pressure inside the seal bearing with an oil pressure outside the seal bearing.
3. The large diameter shield tunneling machine insert hob of claim 2, wherein said pressure balancing device includes a sealing piston, an axial hole is provided in said arbor, said axial hole is in communication with said sealing bearing, and said sealing piston is mounted in said axial hole.
4. The large diameter shield tunneling machine insert hob according to any one of claims 1 to 3, wherein the tip portions of the cutting teeth of the insert alloy ring are spaced 56mm to 60mm from the surface of the hardfacing body.
5. The large diameter tipped hob for shield tunneling machines of any one of claims 1 to 3, wherein the tipped alloy ring has an interference fit with the cutter body.
6. An inserted hob for a large-diameter shield tunneling machine according to any one of claims 1 to 3, wherein there are two pairs of the inserted alloy cutter rings, and each pair of the inserted alloy cutter rings has one ring of the inserted cutter rings to form a split type double-edged inserted hob.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682757.1U CN209855797U (en) | 2019-05-14 | 2019-05-14 | Inserted hob for large-diameter shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682757.1U CN209855797U (en) | 2019-05-14 | 2019-05-14 | Inserted hob for large-diameter shield machine |
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| Publication Number | Publication Date |
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| CN209855797U true CN209855797U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920682757.1U Active CN209855797U (en) | 2019-05-14 | 2019-05-14 | Inserted hob for large-diameter shield machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216994A (en) * | 2021-05-06 | 2021-08-06 | 中建铁投轨道交通建设有限公司 | Construction method for correcting deviation by overexcavation of inserted hob of shield tunneling machine |
-
2019
- 2019-05-14 CN CN201920682757.1U patent/CN209855797U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216994A (en) * | 2021-05-06 | 2021-08-06 | 中建铁投轨道交通建设有限公司 | Construction method for correcting deviation by overexcavation of inserted hob of shield tunneling machine |
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