CN203321526U - Hobbing cutter ring adaptable to soft rock construction - Google Patents

Abstract

The utility model provides a hobbing cutter ring adaptable to soft rock construction, and belongs to the field of cutters for shield tunneling machines. The hobbing cutter ring mainly comprises a basic cutter ring 1 and 4-36 extended wings 2. The basic cutter ring 1 is mounted on a shell of a hobbing cutter through an inner hole of the basic cutter ring 1. The 4-36 extended wings are arranged on each of the upper side and the lower side of the basic cutter ring 1 in uniform distribution. Through the structure, the hobbing cutter ring rotates well relatively to a hobbing cutter shaft, and is uniform in abrasion, large in rolling size and good in crushing effect; thrust and torque of a cutterhead are not improved obviously, rock breaking efficiency is improved, and service life is prolonged.

Description

The Hob ring that adapts to soft rock construction

Technical field

The Hob ring that adapts to soft rock construction belongs to shield machine and uses the cutter field, is a kind of rapid wear accessory on hob cutter for shield machine.

Background technology

In the constructing tunnel of the engineerings such as shield machine is widely used in subway, builds the road, water conservancy, be separately installed with hobboing cutter, tearing cutter, center cutter, scraper etc. on the corresponding tool rest of its rotating cutter-head, these cutter integrations of operation, stratum rolloff, fragmentation, the trench diggings such as rock, gravel, earth are torn and scraping, and wherein the effect of hobboing cutter is mainly to rock rolloff, fragmentation.Used Hob ring, for the hard rock working design, is not expanded the wing, and its cross sectional shape as shown in Figure 5.The rock breaking mechanism of hobboing cutter is: under the thrust of cutterhead, torsional interaction, cut out a series of concentric grooves on face.When thrust surpasses the intensity of rock, rock under the disk cutter point of a knife is directly broken, point of a knife injection rock, form crush zone and radial crack, further pressurization, when the hobboing cutter spacing meets certain condition, between adjacent hobboing cutter, the rock internal fissure extends and mutually connects, form carg and avalanche, hobboing cutter completes rock break-off process one time.But this Hob ring is when soft rock geological stratification or the construction of gravel geological stratification, face can produce moderate finite deformation under the extruding of hobboing cutter driving, between adjacent hobboing cutter, the crack growth length of rock is inadequate, can not mutually connect, therefore can not make rock formation fragment the avalanche between adjacent hobboing cutter, this reduces the cutting effect of hobboing cutter at soft rock strata greatly, and can cause Hob ring the phenomenon of eccentric wear to occur, greatly reduce the application life of Hob ring, sometimes even make hobboing cutter lose the ability of cutting fractured rock.Therefore need to improve shape and the structure of Hob ring.

The utility model content

The purpose of this utility model is to provide a kind of relative cutter shaft and rotates, even wearing, and the rolloff size is wide, and crushing effect is good, and efficiency is high, adapts to the Hob ring of soft rock construction; It mainly comprises basic cutter ring, the expansion wing, by endoporus, is arranged on the housing of hobboing cutter, and at the upside of basic cutter ring and downside, each uniformly arranges 4～36 expansion wings.After adopting said structure, cutter shaft rotates relatively, even wearing, and the rolloff size is wide, and crushing effect is good, and can obviously not improve thrust and the moment of torsion of cutterhead, but has improved efficiency of breaking rock and application life.

The accompanying drawing explanation

Figure of description is the structural representation of the Hob ring of adaptation soft rock construction, and wherein Fig. 1 is front view, the top view that Fig. 2 is Fig. 1, the upward view that Fig. 3 is Fig. 1, the sectional drawing that Fig. 4 is A-A in Fig. 2, the sectional drawing of B-B in Fig. 4 or Fig. 3, Fig. 5 is the sectional drawing that adapts to the Hob ring of hard rock construction.

In accompanying drawing, the 1st, basic cutter ring, the 2nd, the expansion wing.

The specific embodiment

Embodiment below in conjunction with accompanying drawing to the Hob ring of adaptation soft rock construction elaborates.

As shown in Figure 1, Figure 2, Figure 3, Figure 4, the Hob ring that adapts to soft rock construction, mainly comprise basic cutter ring 1, the expansion wing 2, by its endoporus, be arranged on the housing of hobboing cutter, from Fig. 4 and Fig. 5, can know, the section shape of basic cutter ring 1 and to adapt to the section shape of Hob ring of hard rock construction the same, at the upside of basic cutter ring 1 and downside, each uniformly arranges 4～36 and expands the wings 2.After adopting said structure, cutter shaft rotates relatively, even wearing, and the rolloff size is wide, and crushing effect is good, and can obviously not improve thrust and the moment of torsion of cutterhead, and has improved efficiency of breaking rock and application life.

Claims (1)

1. adapt to the Hob ring of soft rock construction, mainly comprise basic cutter ring (1), the expansion wing (2), basic cutter ring (1) is arranged on the housing of hobboing cutter by its endoporus, it is characterized in that: at the upside of basic cutter ring (1) and downside, each uniformly arranges 4～36 expansion wings (2).

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