CN108118736B - Reamer head for reducing cutting resistance by utilizing three-dimensional guiding surface and cutter suction device - Google Patents
Reamer head for reducing cutting resistance by utilizing three-dimensional guiding surface and cutter suction device Download PDFInfo
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- CN108118736B CN108118736B CN201711362327.3A CN201711362327A CN108118736B CN 108118736 B CN108118736 B CN 108118736B CN 201711362327 A CN201711362327 A CN 201711362327A CN 108118736 B CN108118736 B CN 108118736B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
- E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
- E02F3/9231—Suction wheels with axis of rotation parallel to longitudinal axis of the suction pipe
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Abstract
A reamer head for reducing cutting resistance by utilizing a three-dimensional guiding surface and a cutter suction device. The reamer head comprises a mounting structure, a plurality of reamer holders 32, a reamer beam 34, a plurality of reamer arms 33 and reamer teeth 35; the mounting structure, the plurality of reamer holders and the cutter holder beam 34 form a frame structure of the reamer head 3; the reamer teeth 35 are fixedly mounted outside the reamer head 3 through a reamer arm 33, and the reamer arm 33 enables the installation direction of the reamer teeth 35 to be directed in the tangential direction of rotation of the reamer teeth 35 around the reamer driving shaft 2. The reamer teeth 35 adopt three-dimensional guiding reamer tooth surfaces for reducing cutter tooth cutting resistance of the cutter suction dredger. Because the reamer teeth 35 of the invention adopt three-dimensional guiding reamer teeth, the soil layer is cut into the soil layer in a progressive cutting process in the reamer excavation construction process, and the soil layer slides to one side of the teeth and is separated from the reamer teeth under the action of extrusion force in the continuous cutting process, the sliding distance of the reamer teeth is small, and the accumulation at the tooth root is avoided.
Description
Technical Field
The invention belongs to the technical field of dredging engineering and ocean engineering construction.
Background
With the development of economy and social life, the demand of human beings for exploration and utilization of ocean and ocean resources is increasing, and the demand is promoting the rapid development of various fields of dredging engineering and ocean engineering, in dredging engineering, the construction mode of cutter suction dredge is one of typical modes of construction for seabed substances, typical equipment is a cutter suction dredge, the cutter suction dredge can be used for dredging operations with various different soil textures, when the cutter suction dredge is used for dredging soil to be cut, cutter teeth cut into the soil layer, the soil layer is forced to separate and loosen, the separated and loosened soil layer enters a cutter head suction port under the high-power transmission of a cutter suction dredge pump and is then transmitted to a preset position, the way of improving the construction efficiency of the conventional cutter suction dredger is to increase the installed power of the cutter suction dredger, the current development trend of the cutter suction dredger is to be developed to be provided with a high-power engine, and the increase of the cutter excavating force is a direct idea, so that the construction efficiency of the cutter suction dredger can be improved, the cutter power can be increased to ensure the excavating force, but the problem of the economical efficiency of the cutter unit energy operation is not solved, the effect of cutting soil by the cutter can separate soil layers, the cutter power can be increased to ensure that the cutter excavating construction can be smoothly carried out, but the acting force on the cutter is not reduced, and the operation economical efficiency is not improved.
The existing cutter tooth structure forms are all aimed at cutting into soil layers by cutter teeth, cutting into, separating and conveying the soil layers, so that the cutter digging effect is realized by realizing the functions, and the cutter tooth structure forms can be seen from the cutter tooth structure forms and can be divided into the front surface of the cutter tooth and the back surface of the cutter tooth.
The structure surface is divided from functions, the front surface of the reamer tooth is a structure surface directly contacted with a soil layer, the structure has a main cutting effect, the soil layer to be cut is decompressed mutually with the reamer tooth, the soil layer is deformed, the soil layer is separated under the action of the stress of the soil layer closest to the reamer, the structure surface is contacted with the reamer tooth, slides along the front surface of the reamer tooth, and finally slides to the tooth root or is piled to a certain height to be separated from the reamer tooth under the action of the follow-up soil layer. In the process, the structure of the reamer teeth enables the sliding distance of the cutting soil layer on the reamer teeth structure to be larger, and the stacking degree of the reamer teeth to be larger, so that the stress condition of the reamer teeth in the cutter suction construction process is increased, and the power consumption of the reamer is increased. The back of the reamer tooth is a structural surface with supporting function, so that the reamer can bear a certain acting force without breaking, and abrasion is continuously generated in the cutting process of the reamer tooth.
The existing cutter tooth front structure is designed into a plane structure, and the two-dimensional plane structure has only a simple cutting effect. In the cutting process, a cutting soil layer is cut into from the tooth tip of the reamer tooth along the relative cutting movement direction, and moves in a migration manner along the front face of the reamer tooth from the tooth tip to the tooth root direction, and in the digging process of the reamer tooth, the mutual friction distance between the soil layer and the tooth is too long, the friction force is larger, and the power consumption is more. Meanwhile, when clay is excavated, the density of the clay at the piled up part is larger and larger under the extrusion of sliding soil, the strength is higher and higher, and the whole reamer head is easy to be blocked. Therefore, the cutter suction device for the existing dredging dredger has high energy consumption and low operation efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and discloses a reamer head and a cutter suction device for reducing cutting resistance by utilizing a three-dimensional guide surface, wherein reamer teeth 35 in the device are excavating components for excavating soil, the cutter teeth 35 cut into soil layers to realize the purposes of separating, loosening and excavating the soil, and the separated soil is conveyed to a storage position through the carrying effect of water flow to complete the cutter suction excavating process, so that the cutter suction operation efficiency is high and the energy consumption is low.
The invention adopts the technical scheme that:
the reamer head 3 for the dredging dredger is characterized by comprising a mounting structure 31, a plurality of reamer holders 32, a reamer beam 34, a plurality of reamer arms 33 and reamer teeth 35;
the mounting structure 31, the plurality of reamer holders 32 and the cutter holder beams 34 form a frame structure of the reamer head 3;
the plurality of reamer holders 32 are uniformly arranged around the circumferential direction of the reamer axis, six reamer holders are arranged in the frame structure, and the plurality of reamer holders are arranged between the mounting structure 31 and the reamer beams 34;
the mounting structure 31 is connected with the reamer rest 32 in an axial side manner by adopting a welding manner, and the reamer rest 32 is connected with the cutter rest beam 34 in an outer side manner by adopting a welding manner;
the reamer teeth 35 are fixedly mounted outside the reamer head 3 through a reamer arm 33, and the reamer arm 33 enables the installation direction of the reamer teeth 35 to be directed in the tangential direction of rotation of the reamer teeth 35 around the reamer driving shaft 2.
In particular, the reamer arm 33 is connected to the reamer mount 32 and the reamer beam 34 in the form of a weld.
Specifically, the reamer teeth 35 are formed byThe surface of the three-dimensional guiding reamer tooth,is used for reducing the cutting resistance of cutter teeth of the cutter suction dredger.
The cutter suction device for the dredging dredger comprises the cutter head 3 structure and is characterized by further comprising a driving shaft 2 and a cutter suction dredger bridge 1; the reamer head 3 is mounted on the driving shaft 2, and the driving shaft 2 and the reamer head 3 are mounted on the bridge 1.
The bridge frame 1 is a mounting structure of the reamer head 3 and the driving shaft 2, bears the reaction force in the excavating construction process and plays a role of a structural body frame.
The reamer driving shaft 2 is used for inputting power for reamer excavation construction, work consumed by reamer excavation is input from the input shaft, and the reaction force of the reamer head in the excavation process is borne.
The reamer head 3 plays a structural supporting role, and reamer teeth 35 can be carried on the reamer head 3 and connected with the reamer driving shaft 2, so that the reamer driving shaft 2 drives the reamer teeth 35 carried on the reamer head 3 to carry out soil excavation. When the dredge operation is carried out, the reamer head 3 is driven by the driving shaft 2 to operate, and the reamer teeth 35 on the reamer head 3 start to excavate soil layers along with the rotation.
In the above technical scheme, the reamer teeth 35 of the present invention adopt three-dimensional guiding reamer teeth, and in the process of the reamer digging construction, soil cutting is a progressive cutting process, and in the continuous cutting process, soil slides to one side of the teeth under the action of extrusion force and is separated from the reamer teeth, so that the sliding distance of the reamer teeth is small, and accumulation at the tooth root is avoided. Specific working principle:
when the reamer cuts soil layer, firstlyTooth point 352Separating the parts; front cutting edge 351 of main faceIn the form of a bulge, saidFront cutting edge 351 of main faceSeparate cutter toothMajor cutting face 353A side cutting face 354, the side cutting face 354 being parallel to the cutting relative movement direction;major cutting face 353Is composed ofFront cutting edge 351 of main face、Major cutting edge 355The rear cutting edge 356 of the main face is controlled to form a shrinkage-guiding three-dimensional curved surface;
during the process of digging and cutting inMajor cutting edge 355Is torn obliquely, and the separated cutting material is cut by the reamer teeth to form relative movementMajor cutting face 353Sliding soil layer due to reamer teethMain cutter Sliced noodles 353The sliding soil layer is finally separated from the reamer teeth, the sliding distance is reduced, and accumulation at the tooth root is avoided.
The construction method and the effect can be obtained:
in the process of the cutter excavating construction, the three-dimensional guiding cutter tooth of the invention cuts into the soil layer in a progressive cutting process, firstly cuts into the tooth tip,in the continuous cutting process, the soil layer slides to one side of the teeth under the action of the extrusion force and is separated from the rake teeth, in the cutting process of digging, the soil layer is obliquely torn along with the further cutting of the main cutting edge, the separated cutting material slides along the main cutting surface under the action of relative movement formed by the cutting of the reamer teeth, and the soil layer slides due to the reamer teethMajor cutting face 353Is slid to the inner side of the teeth under the three-dimensional guiding action of the cutter teeth and finally separated from the cutter teeth. The three-dimensional guiding surface of the cutter tooth can effectively reduce the cutting resistance of the cutter tooth, and is favorable for sliding with a soil layer to one side of the tooth, so that the power consumption is reduced, and the resistance of the cutter tooth in the cutter suction excavation construction process is reduced.
Drawings
Fig. 1 is a schematic diagram of a reamer mount bridge and drive.
Figure 2 is a schematic side and cross-sectional view of the reamer head.
Fig. 3 is a schematic view (three views) of the reamer teeth.
Fig. 4 is a schematic view of the cutting forces of the reamer teeth.
The numbers in the figures are marked:
Reamer head 3: mounting structure 31, reamer mount 32, reamer arm 33, cutter mount beam 34, reamer teeth 35
Cutter teeth 35:
the tooth tip 352 is provided with a tooth tip,
the rear cutting face 359 is provided with a cutting surface,
the knife handle 360 is provided with a knife,
the major cutting edge 355 of the cutting edge,
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the reamer head 3 is mounted on a bridge of the cutter suction dredger and driven by a reamer driving shaft, reamer teeth 35 are mounted on a cutter frame beam 34 and a reamer frame 32 of the reamer head, the reamer is connected to the cutter frame beam and the reamer frame in a transitional manner by a reamer arm, the reamer applies cutting force to a cut soil layer in construction, plays roles of cutting, loosening and separating a cut object, construction power required in the construction of the reamer head is provided by the reamer driving shaft 2, and meanwhile, the reamer driving shaft bears the reaction force of the soil layer to the reamer head.
The cutter teeth 35 are cutting construction structural members in the process of excavating, apply acting force to a construction soil layer and loosen and separate the construction soil layer, in the process of constructing, the construction reaction force is borne, the stressed cutter teeth consume cutter power in the process of constructing, the cutter structure form is directly related to the stress condition, the existing cutter teeth are of two-dimensional plane structures, the sliding distance of the cutting object and the acting force are large, deposited cutting objects are formed at tooth roots, cutter arms and cutter frame beams, the power consumption is further increased, and shutdown cleaning is needed when the condition of dredging objects is serious as cohesive soil.
The cutter teeth 35 are designed from:
the reamer teeth 35 are adoptedThe surface of the three-dimensional guiding reamer tooth,is used for reducing the cutting resistance of cutter teeth of the cutter suction dredger. The said processA three-dimensional guiding surface,in order to avoid the technical problems that in the existing two-dimensional plane reamer tooth structure, the mutual friction distance between soil layers and teeth is too long, the friction force is large, the consumption power is high, and meanwhile, when clay is excavated, the density of clay at a stacking position is larger and larger under the extrusion of sliding soil, the strength is higher and higher, and the blocking of the whole reamer head is easy to cause. To this end, the invention providesReamer tooth structure in the form of a central bulgeThe design reduces the sliding distance of the cutting soil layer on the cutter teeth, reduces the cutting force of the cutter teeth and avoids the problem of accumulation of the cutting clay soil layer. Research shows that the inventionThree-dimensional guiding surfaceThe soil layer can be moved to one side of the tooth, the overlong sliding distance on the cutting surface of the reamer tooth is avoided, and meanwhile, the problem that the reamer tooth is piled up on the reamer tooth when clay soil layer is cut is well solved, so that the power consumption of the reamer tooth is effectively reduced, and the cutting of the reamer tooth is solvedStacking and power consumption problems in clay.
Further, the saidForm of intermediate ridgeThe reamer tooth structure of (a) is characterized by: a reamer tooth structure for reducing cutting resistance by utilizing three-dimensional guiding surface is characterized in that the reamer tooth main body is composed ofMajor cutting edge 355、Front cutting edge 351 of main faceThe side bottom cutting edge 357 forms a raised three-dimensional structure; and the reamer tooth bodyMajor cutting face 353Is composed ofFront cutting edge 351 of main face、Major cutting edge 355The rear major surface cutting edge 356 collectively controls the formation of a converging directed three-dimensional curved surface.
According to analysis research and experimental research, the cutting process of the three-dimensional guide cutter tooth can separate the cutting object to one side of the tooth relative to the cutter tooth with a two-dimensional plane structure, so that the stress of the tooth is reduced, and the generation of siltation is effectively reduced. The reamer teeth 35 are excavating components for excavating soil, the reamer teeth 35 cut into soil layers to achieve the purposes of separating, loosening and excavating the soil, and the separated soil is conveyed to a storage position through the carrying effect of water flow to complete the cutter suction excavating process.
Compared with the traditional reamer teeth, the structure of the reamer teeth 35 not only has the function of cutting in, but also realizes the soil cutting guiding function. The reamer tooth 35 of the present embodiment includes a reamer tooth tip 352, a main face front cutting edge 351, a main face bottom cutting edge 355, a main cutting edge 356, a side face bottom cutting edge 357, a side face rear cutting edge 358, a main cutting face 353, a side cutting face 354, a rear cutting face 359, an undercut cutting face 361, and functions as:
the handle 360 is used as a support structure for being installed and connected with the cutter arm 33. (same as conventional reamer teeth)
The reamer tooth tip 352 is used as an earth cutting structure, and is firstly contacted with an earth layer when the reamer tooth is used for cutting, so that the cutting area is small.
The reamer tooth side cutting surfaces 354 are support structures that are parallel to the direction of movement during the cutting process of the reamer, and serve as the primary structural support.
The side bottom cutting edge 357 and the main cutting edge 355 are of earth cutting structures, the side bottom cutting edge 357 and the main cutting edge 355 form an angle of 45 degrees, the side bottom cutting edge 357 and the main cutting edge 355 gradually cut into a soil layer in the reamer construction process, and the cutting resistance is small.
The reamer tooth main cutting face 353 is an earth cutting guide structure, and plays a role in cutting guide, and earth slides and moves along the face in the cutting and excavating process. The main cutting surface 353 is located inside the reamer teeth and is a main sliding surface for cutting soil layers, when the reamer digs, the soil layers are separated and then slide on the reamer teeth, the cutting soil layers are separated at the tooth tip 352 firstly due to the cutting movement of the reamer teeth, the soil layers are obliquely torn along with the further cutting of the main cutting edge 355, the separated cutting materials slide along the main cutting surface 353 due to the relative movement formed by the cutting of the reamer teeth, the sliding soil layers slide towards the inner sides of the teeth due to the three-dimensional guiding function of the main cutting surface of the reamer teeth and finally are separated from the reamer teeth, the sliding distance is reduced, and the accumulation at the tooth root is avoided.
The main surface front cutting edge 351 is one of the earth cutting guide structural features, and structurally separates a main cutting surface 353 and a side cutting surface 354; the side cutting surface 354 is parallel to the cutting movement direction of the reamer teeth, so that the cutting resistance born by the cutter teeth is negligible, the main cutting surface 353 is a main bearing load surface and is a structural guide element for realizing the soil to be cut, the main cutting surface 353 and the side cutting surface 354 form a ridge structure in terms of tooth shape of the reamer teeth, the soil layer excavated and cut and separated by the reamer teeth mainly slides on the main cutting surface 353 of one of the ridge structure structural elements, the guide performance of the main cutting surface 353 is determined by two parameters of a cutting angle theta and a cutting edge angle alpha, and the ridge structure design of the structure ridge and the structural characteristic parameters of the guide sliding surface enable the reamer teeth to realize the soil guide function in the soil layer cutting operation process.
Furthermore, the invention calculates and controls the shape parameters of the tooth profile, provides a reamer tooth cutting stress formula, and designs and determines two key parameters, namely a cutting angle theta and a cutting edge angle alpha:
the stress formula is given:
the three parameters of tau, t and b are related to the mechanical property of the excavated soil and the excavation feed quantity of the reamer head, wherein tau is the shearing resistance of the soil; t is the cutting thickness, which is related to the reamer head rotational speed and reamer head feed; b is the cutting width of the reamer teeth, the cutting efficiency is related, and the cutting width is not adjusted when the tooth shape is optimized. So the three parameters tau, t and b are not adjusted and considered in the tooth design process.
Delta is the friction angle of the cutter teeth with the earth being excavated, and studies according to the present invention indicate that delta takes a value between 0.11 radians and 0.12 radians.
Two key parameters, cutting angle θ, edge angle α:
and theta is a cutting angle, alpha is a cutting edge angle, and the two parameters determine tooth shapes, namely the two parameters can optimally optimize the earth cutting guiding characteristics of the reamer teeth, so that the excavating stress condition of the reamer teeth is controlled. As shown in fig. 4:
the X direction is the tangential direction of the rotary motion of the cutter teeth and is also the cutting direction relative to the soil layer.
The Y direction is the axial direction of the reamer drive shaft 2.
The Z axis is the axis direction perpendicular to the X axis and the Y axis.
The angle formed by the main surface front cutting edge 351 and the X-axis is θ, and θ is a cutting angle.
The major cutting edge 355 makes an angle alpha with the Y axis, alpha being the edge angle.
Front cutting edge 351The angle with the undercut cutting surface 361 is an angle β, which is a linear control angle.
The main face rear cutting edge 356 makes an angle delta with the undercut cutting surface 361, delta being a linear control angle.
The tooth form is controlled to obtain a three-dimensional curved surface for guiding in the relative movement direction of cuttingTooth point 352First make an incision, thereafter byMajor surface front cutting edge 351, major cutting edge 355, and major cutting surface 353And the subsequent cutting action is carried out. The composition of the guiding factors includes:
first, the main face front cutting edge 351 plays a role in a direction dividing during the cutting process of the reamer, is configured to separate the main cutting face 353 and the side cutting face 354, and makes a cutting movement with the soil layer first, and as the reamer cuts further, the pressed soil layer is forced to slide toward the inside of the teeth.
A second element, namely a third element,the tooth tip 352, the main cutting edge 355 and the side bottom cutting edge 357 are formed on the same plane Undercut surface 361, wherein undercut surface normal direction 362 is shown in fig. 3; the saidFront cutting edge 351 of main faceIntersecting said undercut surface 361;major cutting edge 355Is hyperbolic, and the intersection angle is the angle betaTooth point 352The angle is 15 degrees, then gradually increases, the maximum angle is 50 degrees, and the increase of the angle beta is beneficial to the lateral sliding of the cut soil layer; the side cutting face 354 is parallel to the direction of movement in the plunge direction; the curve of the rear cutting edge 356 of the main surface is also hyperbolic, the rear cutting edge 356 of the main surface also intersects the undercut cutting surface 361 at an angle delta of 55 degrees, and then increases gradually to a maximum of 75 degrees, the angle delta increasing to facilitate the lateral sliding of the cut soil layer.
Element three, theTooth tip 352, main face front cutting edge 351, main cutting edge 355The side bottom cutting edges 357 together formMajor cutting face 353 and side cutting face 354The cutting separation guide element of (1) is firstly in the cutting processTooth point 352Cutting, then gradually cutting each cutting characteristic element, small cutting resistance and gradual change, and cutting soil layer is along under the action of extrusion pressureMajor cutting face 353 and side cutting face 354And (5) sliding.
In the invention, among the cutting elements consisting of the front cutting edge 351 of the main surface of the reamer tooth, the tip 352 of the reamer tooth, the main cutting surface 353 of the reamer tooth and the main cutting edge 356, according to a mechanical formula, when the cutting angle theta of the tip of the reamer tooth is 45 degrees and the cutting angle alpha is 40 degrees, the cutting force of the reamer tooth is in the bottommost state level, meanwhile, the parameter theta is gradually increased from the angle of 45 degrees along the x direction of the reamer tooth, and the y direction perpendicular to the x horizontal direction of the cutting direction is that the cutting angle alpha is gradually reduced, so that the migration resistance of soil to the tooth root is increased, and the sliding resistance to the tooth side is obviously reduced, thereby realizing the purposes of reducing the digging resistance and preventing the soil from accumulating on the tooth.
The invention is mounted on a reamer head 3 as shown in figure 2. The reamer head 3 is formed by a frame structure composed of an installation structure 31, a plurality of reamer holders 32 and a cutter holder beam 34, and reamer teeth 35 of the present invention are mounted and fixed on the reamer head 3 through a reamer arm 33. The cutter teeth 35 are cutting construction structural members in the process of excavating, apply acting force to a construction soil layer and loosen and separate the construction soil layer, bear construction reaction force in the process of constructing, consume cutter power in the process of constructing, have a cutter structure form directly related to stress conditions, are of two-dimensional plane structures, have larger sliding distance and acting force of cutting objects, form silted cutting objects at tooth roots, cutter arms and cutter frame beams, further increase power consumption, and need shutdown cleaning when the dredged objects are cohesive soil. According to analysis research and experimental research, the cutting process of the three-dimensional guide cutter tooth can separate the cutting object to one side of the tooth relative to the cutter tooth with a two-dimensional plane structure, so that the stress of the tooth is reduced, and the generation of siltation is effectively reduced. The reamer teeth 35 are excavating components for excavating soil, the reamer teeth 35 cut into soil layers to achieve the purposes of separating, loosening and excavating the soil, and the separated soil is conveyed to a storage position through the carrying effect of water flow to complete the cutter suction excavating process.
Claims (2)
1. The reamer head for the dredging dredger is characterized by comprising a mounting structure (31), a plurality of reamer holders (32), a cutter holder beam (34), a plurality of reamer arms (33) and reamer teeth (35);
the mounting structure (31), the plurality of reamer holders (32) and the cutter holder beam (34) form a frame structure of the reamer head (3);
the plurality of reamer holders (32) are uniformly arranged around the circumferential direction of the axis of the reamer, six reamer holders are arranged in the frame structure, and the plurality of reamer holders are arranged between the mounting structure (31) and the cutter holder beam (34);
the mounting structure (31) is connected with the reamer rest (32) in an axial side mode in a welding mode, and meanwhile the reamer rest (32) is connected with the cutter rest beam (34) in an outer side mode in a welding mode;
the reamer teeth (35) are fixedly carried outside the reamer head (3) through reamer arms (33), and the reamer arms (33) enable the installation direction of the reamer teeth (35) to point to the tangential direction of rotation of the reamer teeth (35) around the driving shaft (2);
the front main surface cutting edge (351) of the reamer tooth (35) is designed in a bulge mode, the front main surface cutting edge (351) separates a main cutter tooth cutting surface (353) and a side cutting surface (354), and the side cutting surface (354) is parallel to the cutting relative movement direction; the main cutting surface (353) is formed by controlling the main surface front cutting edge (351), the main cutting edge (355) and the main surface rear cutting edge (356) together to form a shrinkage guiding three-dimensional curved surface.
2. Reamer head according to claim 1, wherein the reamer teeth (35) are provided with three-dimensionally directed reamer tooth surfaces for reducing cutter drag of cutter suction dredger cutter teeth.
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| CN207944498U (en) * | 2017-12-18 | 2018-10-09 | 中交疏浚技术装备国家工程研究中心有限公司 | It drops the reamer head of cutting resistance using three-dimensional guide surface and twists and inhale device |
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| CN103572796A (en) * | 2012-08-01 | 2014-02-12 | 中交上海航道勘察设计研究院有限公司 | Ridged double-curved-surface rake tooth |
| US9303384B2 (en) * | 2013-04-17 | 2016-04-05 | Colorado School Of Mines | Cavitating water jet hard rock dredge mining system |
| CN103866808A (en) * | 2014-03-11 | 2014-06-18 | 徐跃鹏 | Reamer head for cutter suction device with graded cutter teeth |
| CN106120939B (en) * | 2016-08-17 | 2018-04-10 | 中交天航港湾建设工程有限公司 | A kind of dredger strength is broken ground reamer |
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| CN207944498U (en) * | 2017-12-18 | 2018-10-09 | 中交疏浚技术装备国家工程研究中心有限公司 | It drops the reamer head of cutting resistance using three-dimensional guide surface and twists and inhale device |
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