Cutting crown mountain harvester

 

(57) Abstract:

The essence of the invention: cutting crown mountain harvester includes a housing carrying blades, holders and Portorosa tools. Transporting the blades are located on the body of the crown along helical lines and offset relative to each other. The working surface of the conveying blades formed at least part of the side surface of the housing of the tool holder. Portorosa tools installed with a constant step in the destruction of at least the section helix, which determines the shape of the corresponding transporting blades. The step size of the destruction of rock cutting tools, which are arranged with a constant pitch on the site of one of the helical lines is greater than the step size of the destruction of rock cutting tools, which are arranged with a constant pitch in the adjacent helices. 8 C.p. f-crystals, 6 ill.

The invention relates to the mining industry, in particular to cutting bits for mining machines, and can be used in the design of Executive bodies of mining and mostly roadheaders for the destruction of the mineral and artificial mother is Stroitelno-road machines in the construction and repair of roads.

Known for cutting crown mountain harvester, which includes a housing fixed to the body of the crown and spaced helix residenziali with slots to accommodate holders of rock cutting tools and Portorosa tools, such as cutters unilateral and bilateral actions, which in turn is placed in holders [1]

Cutting crown provides the possibility of destruction of different strength of rocks in the rational modes by changing the direction of rotation of the crown and use as rock cutting tools, cutters unilateral and bilateral actions that allow you to change the size of the chip thickness and the step of destruction. The disadvantages of the known cutting crowns can be attributed to the necessity of complicating the structure of the Executive body of the mountain combine to provide reverse rotation of the crown. In addition, the use of rock cutting tools radial cutters, which are mounted with limited rotation in the socket of the tool holder, increases the intensity of the destruction process and leads to performance degradation of the cutting crown due to their frequency, C is escow single acting and double acting is uneven, that will lead to the replacement of cutters bilateral actions because of their one-sided wear. The disadvantages of the known designs of cutting crowns can also be attributed to the lack of devices for transporting the destroyed material, which leads to poor performance of the education production due to the need for additional work to remove the destroyed material and loading it on a conveying device.

Closest to the technical essence and received technical result is cutting crown mountain harvester, which includes a housing located on the body of the crown along helical lines and offset relative to each other along the perimeter of at least two conveying blades, the working surface of each of which is formed by at least part of the side surface of the housing of the tool holder attached to the housing crown holder with slots to accommodate holders of rock cutting tool and mounted on a screw line, which defines the shape of the corresponding transporting blades, Portorosa tools [2]

The known device selected in the quality of the t transportation destroyed material and allows to obtain a sufficiently high life rock cutting tools. The disadvantages of the known cutting crowns can be attributed to the limited scope of its application. Thus, when a specific circuit arrangement of rock cutting tools on the housing of the cutting crown last ensure effective destruction of material only with certain physical and mechanical properties. In the destruction of the material with different properties (changing the strength of the breed) cutting crown will work in sub-optimal mode, which will lead to a substantial increase in the intensity of the destruction process. Therefore, in the formation of a working array generation and the array whose properties change as drilling, you must use a different cutting crown optimal for a particular type of destructive material of the formation, rock cutting tool. This circumstance, in one case (when saving in the process of sinking the optimal intensity of destruction) will result in significant performance degradation of the fracture process due to the additional dismantling and mounting of the cutting crown in connection with the change of properties of the fractured material or, in another case, (at education produce the same cutting to the of tools.

The invention is directed to solving the problem by creating such cutting crown mountain harvester, which would provide education develop with changing the length of physico-mechanical properties of fractured material with a minimum consumption of the process of destruction and minimal costs of adaptation cutting crowns to the type of destructible material. The technical result that can be obtained with the implementation of the invention is to reduce the energy intensity of the process by maintaining an optimal scheme of arrangement of rock cutting tools on the housing of the cutting crown in the destruction of materials with different mechanical properties.

The problem is solved due to the fact that the cutting crown mountain harvester, which includes a housing located on the body of the crown along helical lines and offset relative to each other along the perimeter of at least two conveying blades, the working surface of each of which is formed at least part of the side surface of the housing of the tool holder attached to the housing crown holder with slots for placement of rock cutting tool holders and razrushayushie tools last at least the area of each helix is installed with a constant pitch of destruction, with the step size of the destruction of rock cutting tools, which are arranged with a constant pitch on the site of one of the helical lines is greater than the step size of the destruction of rock cutting tools, which are arranged with a constant pitch in adjacent helices.

In addition, the problem is solved due to the fact that the cutting head has a provision for the protection cavity nests in the holders from the interaction of the destructible material. Under this option, the structural embodiment of the cutting crown increases the reliability of its work, because it eliminates abrasive machining tool holder particles of destroyed material.

In addition, the problem is solved by means of the device for protection of cavity nests in the holders from interaction with destructible material made in the form of tubes, each of which is installed in the socket of the corresponding tool holder can be locked in position. Under this option constructive perform the specified device significantly reduced POSELENIE for protection cavity nests in the holders from interaction with destructible material made in the form of protective casing U-shaped form, which is fixed to the body of the crown and/or on the respective conveying blades with screw connection and covers side surfaces of the housings of the holders, which are located on helices, forming one of the transporting blades. The execution device in the form of protective casing U-shaped form allows you to provide protection to the body of the tool holder from the abrasive action of the destroyed material, which increases the service life of the cutting tooth.

In addition, the problem is solved due to the fact that the protective cover is made of separate sections, each of which has a device for connection with the body of the corresponding tool holder and/or with the appropriate conveyor blade. Under this option, the structural embodiment of the protective casing is reduced labor costs for Assembly and disassembly. While carrying out installation and dismantling installation of fixtures does not require the use of special lifting mechanisms.

In addition, the problem is solved due to the fact that the device for connecting the protective cover to the housing of the tool holder is made in the form located in paloscia shaped protrusion in the slot of the tool holder. This approach is a constructive device for connecting the protective cover to the housing of the tool holder is provided the possibility of creating a unified attachment, with which, as required in the socket housing holder set or protective casing or holder of rock cutting tool. Under this option, the constructive execution of the specified devices reduces the cost of manufacture of the cutting tooth.

In addition, the problem is solved due to the fact that cutting crown made with zaborniak. Using sabornie on cutting crown allows to reduce the energy intensity of the process of destruction of solid materials by reducing efforts to your feed cutting crowns.

In addition, the problem is solved due to the fact that Portorosa tools on the site each helix is installed with variable pitch destruction, the value of which decreases in the direction of sabunike. When using this scheme of arrangement of rock cutting tools on the housing of the cutting crown decreases the intensity of the destruction process much easier because the depth of the cutting crown in mass has the shape of a truncated cone of revolution, the top of which is oriented in the direction of sabunike, with lots of screw lines Portorosa tools installed with a constant pitch of destruction, are located on the body of the crown, which has the shape of a truncated cone of revolution. In this form the housing of the cutting crown improves the handling of the walls formed by the production, which reduces the time for additional processing of the wall framing to give it a given cross-sectional profile.

In Fig. 1 shows a cutting crown mountain harvester; Fig. 2 scheme of arrangement of rock cutting tools on the housing of the cutting crown at the destruction of the less durable species; Fig. 4 one of the variants of structural embodiment of the device for protection of cavity nests in the holders from interaction with destructible material; Fig. 5 one of the variants of structural embodiment of the device for protection of cavity nests in the holders from interaction with destructible material, and Fig. 6 one of the variants of structural embodiment of the device for connecting the protective cover to the housing of the tool holder.

Cutting crown mountain harvester includes a housing 1, to which oronce preferably has the shape of a body of rotation, for example, a cone of revolution (Fig. 1). On the front end of the body 1 can be fixed zaboric 1. On the body 1 of the cutting crowns are at least two conveying blades 4 and 5. Transporting the blades 4 and 5 can be made in the form of protrusions on the housing 1 or fixed to the body 1 by using the detachable connection, for example by welding. Each conveying blade 4 and 5 is located on the body 1 of the cutting crown along a helical line and offset adjacent its perimeter, preferably at the same distance, that is the initial point of the spiral lines that define the shape of the respective transporting blades are diametrically (with two transporting the blades) or shifted relative to the angle of 120o(when transporting three blades). On the body 1 of the cutting crown pinned holders 6, each of which has a socket 7 for placement of the tool holder (not shown) rock cutting tool 8. The body of each tool holder 6 can be connected with the body 1 of the cutting crown with screw connection, for example, by bolting or using the detachable connection, for example, by welding. Housing reosti 9 transporting each of the blades 4 and 5 are formed at least part of the side surface 10 of the body of the tool holder 6 (Fig. 4, 5 ). As rock cutting tools 8 can be used with rotary or rotary cutters or milling cutter. Most preferably used as a rock cutting tool 8 rotary cutters, that is, cutters, shank of each of which is mounted for rotation in the socket 7 of the respective tool holder 6 around its longitudinal axis of symmetry. Portorosa tools 8 installed via lines that define the shape of the corresponding transporting the blades 4 and 5, there are two helical lines with two transporting the blades 4 and 5(Fig. 2 and 3) or three spiral lines when those transportstyrelsen blades (not shown). Portorosa tools 8 at least on the sections A and B of each helix is installed with a constant step destruction of T and N, respectively (Fig. 2). When the step value destruction (T) rock cutting tools 8, which are arranged with a constant pitch destruction on A plot of one of the helical lines defining the shape of the conveying blade 4, is greater than the step size of destruction (N) rock cutting tools 8, which are arranged with a constant pitch of destruction at the site B in the adjacent screw T>N. It should be noted that a possible alternative structural embodiment of a cutting crowns, which Portorosa tools 8 are installed along the length of each helix with a constant pitch.

Cutting crown mountain harvester can be fitted with a device to prevent the cavity of the socket 7 in the holders 6 from the interaction with the destroyed material.

The specified device can have various options for their constructive perform. Thus,the device for protection of the cavity of the socket 7 in the holders 6 from interaction with destructible material may be in the form of tubes 11, each of which is installed in slot 7 of the respective tool holder 6 can be locked in position (Fig. 4). The tube 11 may be made of metal or polymeric material and its outer diameter greater than the diameter of the socket 7 in the holder 6. The tube 11 is connected to the housing of the tool holder 6 by means of detachable connection, for example, by threaded connection (not shown) or by means of a pin 12, which is placed in the transverse channel of the housing of the tool holder 6 and is mounted for engagement with the notch 13 on p is the intellectual property not shown), the top of which is oriented towards the bottom of the slot 7 in the holder 6. When this tube 11, if necessary, is installed in the slot 7 of the holder 6, for example, with a hammer, and for the extraction tube 11 at its side surface can be made a groove for placing a special screwdriver (not shown).

Device for protection of the cavity of the socket 7 in the holders 6 from interaction with destructible material may be in the form of protective casing 14, which has a U-shaped form (Fig. 5). The protective cover 14 can be fixed to the body 1 of the cutting crown with screw connection, for example by means of lugs 15, which are placed when installing the protective cover 14 in the grooves 16, made on the housing 1 of the crown (not illustrated). The protective cover 14 may be secured in the same way and on the respective conveying blade 4 or 5 (Fig. 5). The connection of the protective casing 14 with the body 1 of the cutting crown and/or the corresponding blade 4 or 5 may be designed as a screw connection or bayonet connection. It should be noted that the protective cover 14 can be attached directly to the body of the tool holder 6. When all opusov holders 6, located on helices, forming one of the conveying blade 4 or 5.

The protective cover 14 may be made in the form of a single element, which covers all the buildings of the holders 6, located on a helix, forming one of the conveying blade 4 or 5. It is most expedient for the convenience of mounting the protective cover 14 to run it in separate sections 17, each of which has a device for connection with the body of the corresponding tool holder 3 and/or with the appropriate conveying blade 4 or 5 (Fig. 3), i.e. each section 17 of the protective cover 14 covers the side surface 10 of the body of one or more holders 6.

The most advisable device for connection of the protective casing 14 or sections 17 with the body of the corresponding tool holder 6 or holders 6 to perform in the form located in the cavity of the protective casing 14 or sections 17 figure ledge 18 and the locking element 19 for fixing the curved ledge 18 in the slot 7 of the holder 6 (Fig. 6). Figure ledge 18 of the specified device on the protective casing 14 or section 17 has the shape of a rock cutting tool holder instrumentista, which records rock cutting tool 8 in the slot 7 of the holder 6. So in shown in Fig. 6 embodiment, structural embodiment of the device for connection of the protective cover 14 to the housing of the tool holder as the locking element 19 is used the split ring, which is identical to the split ring, locking the rotary cutter in the slot 7 of the housing of the tool holder 6, and figure protrusion 18 has the form of a shank rotary cutter and groove to accommodate the locking element 19 in the form of a split ring. Depending on the type used in cutting crown rock cutting tool 8 and the design of the locking device for fixing the rock cutting tool 8 in the slot 7 of the housing of the tool holder 6 is used, a corresponding curved ledge 18 and the corresponding design of the locking element 19, that is, assume the use of the unified attachment for rock cutting tool 8 and the protective casing 14.

Portorosa tools 8 on sites B and D (Fig. 2) corresponding helices 4 and 5, which determines the placement of rock cutting tools 8 can be installed with LASS="ptx2">

At least part of the body 1 of the cutting crown may have the shape of a truncated cone of revolution, the top of which is oriented in the direction of sabunike 3 (Fig. 1). In this case the points a and b of the spiral lines on which Portorosa tools 8 is installed with a constant step destruction, respectively, T and N must be located on the site of the housing 1 cutting the crown, which has the shape of a truncated cone.

Cutting crown mountain harvester works as follows.

When you enable the cutter drive mountain harvester starts to rotate the drive shaft 2 and with him is rotated around its longitudinal axis of the body 1 of the cutting tooth. When the axial flow of the Executive body on the working face formed by developing is the depth of the cutting crown in erodible material. This Portorosa tools 8 interact with the material and destroy it. Destroyed material falls on the working surface 9 of transporting blades 4 and 5 and is transported to the loading mechanism (not shown) for further evacuation from the face formed by the output. Then the Executive body with mechanisms to move (not illustrated) is moved to razrusheniya material, shaping development in the array to the specified profile.

When developing breeds of high strength Portorosa tools 8 is installed in the holders 6 which are situated all screw lines (in this particular example, a structural embodiment of a cutting crowns on the two helical lines) that define the shape of transporting blades (in the above example transporting blades 4 and 5). Thus, in this case, the process of destruction of the material involved all Portorosa tools 8, which are arranged along helical lines 4 and 5. Because the step of destruction (T) rock cutting tools 8, which are located on helix 4, differs ( (exceeds) from step destruction (N) rock cutting tools 8, which are mounted on a screw line 5, the fracture of the material will be proishodit with a minimum step of destruction, which determines the minimum intensity of destruction for this type of breed (high strength).

The excavation site excavation, species which have a lower strength, or when performing work on education excavation in rocks in which the entire length of average strength, for example, in the coal mA increased step destruction, because when you save the step of destruction, which provided Portorosa tools 8 in the destruction of the material with high strength, the increase of intensity of the process of destruction by overgrinding destructible material. In this case carry out the dismantling of rock cutting tools 8, which are located on helix 4, and the destruction of the material is only rock cutting tools 8, which are located on helix 5. In addition, the material of lower strength is destroyed rock cutting tools 8, installed in increments of destruction (N), which has a greater value compared to step destruction, provide defined by two helical lines 4 and 5 rock cutting tools 8 in the destruction of the material with high strength.

The excavation area excavation with weak rocks or when performing work on education excavation in weak rocks, you need to maintain optimal performance of the intensity of the destruction process.To do this, disassemble Portorosa tools 8, which are mounted on a screw line 5, and the destruction is carried out using Portorosa is on its helix 5, installed a big step destruction (T) compared to step destruction (N) rock cutting tools 8, which are arranged along a helical line 4, the energy intensity of the process is weak rocks will be maintained at the optimum level.

It should be noted that in the case of structural embodiment of the cutting crown with the placement of rock cutting tools 8 on three or more helical lines set the optimum step destruction depending on the type of destructible material can be performed by placement of rock cutting tools 8 on the respective helices. The choice of specific values of step destruction of rock cutting tools 8 in each helix is empirically given to enable the cutting of the crown in the optimal mode (with a minimum consumption of the process of destruction) when the overlap of the widest range of types of destructible material.

In principle, if the work of cutting crown slot 7 holders 6 after dismantling of rock cutting tools 8 can remain unclosed. However, generated during the work of cutting crown particles of destroyed material maguirei tools 8 due to the necessary removal of material from the cavity of the socket 7. In addition, the interaction of the destroyed material with the walls of the slot 7 in the tool holder 6 leads to abrasive wear of the internal cavity of the socket 7, which leads to change its geometrical dimensions, and, consequently, a reduction in the reliability of fastening of a rock cutting tool 8 in the slot 7 of the holder 6. To eliminate these shortcomings after dismantling portarray tools 8, located on one of the spiral lines 4 or 5, mount the fixture to protect the cavity of the socket 7 in the holders 6 from the interaction of the destructible material.

After dismantling of rock cutting tools 8 in slot 7 of the holders 6 install the tube 11 and through the pins 12, which are placed in the grooves 13 of the tubes 11, fixed to the latter. If the work of cutting crown 11 prevent the penetration of particles of destroyed material in cavity nests 7. After excavation of the site of excavation during the formation of which these Portorosa tools 8 was not engaged, the tube 11 is removed from nests 7 holders 6 and in their place establish Portorosa tools 8. Similar technology work is carried out with devices for protection the ha 14 of the U-shape. While the protective casing 14 or section 17 protects from interaction with collapsible body material holders 6 rock cutting tools 8, which are not involved in the fracture process. For mounting the protective cover 14 or its individual sections 17 depending on the chosen design of its fastening protrusions 15 of the protective casing 14 is placed in the respective grooves 16 on the housing 1 cutting crown or shaped protrusion 19 of the protective casing 14 or sections 17 are placed in one of the slots 7 of the holder 6 and with the help of the locking element 19 is implemented by its fixation.

When installing rock cutting tools 8 with variable step, the value of which decreases in the direction of sabunike 3, the work of cutting crown will occur in the manner described above. Thus zaboric 3 located on it porodoobrazujushchimi tools 8 will facilitate the initial introduction of cutting crown in erodible material.

1. Cutting crown mountain harvester, including housing, located on the body of the crown along helical lines and offset relative to each other along the perimeter of at least two conveying blades, the working surface of each of ipose crowns the holders with slots to accommodate holders of rock cutting tool and mounted on a screw line, which defines the shape of the corresponding transporting blades, Portorosa tools, characterized in that Portorosa tools at least the area of each helix is installed with a constant pitch of destruction, with the step size of the destruction of rock cutting tools, which are arranged with a constant pitch on the site of one of the helical lines is greater than the step size of the destruction of rock cutting tools, which are arranged with a constant pitch in adjacent helices.

2. Crown under item 1, characterized in that it has a provision for the protection cavity nests in the holders from interaction with destructible material.

3. Crown under item 2, characterized in that the device for protection of cavity nests in the holders from interaction with destructible material made in the form of tubes, each of which is installed in the socket of the corresponding tool holder can be locked in position.

4. Crown under item 2, characterized in that the device for protection of cavity nests in the holders from interaction with destructible material made in the form of protective to whom and with screw connection and covers side surfaces of the housings of the holders, located on helices, forming one of the transporting blades.

5. Crown under item 4, characterized in that the protective casing is made of separate sections, each of which has a device for connection with the body of the corresponding tool holder and/or with the appropriate conveyor blade.

6. Crown under item 5, characterized in that the device for connecting the protective cover to the housing of the tool holder is made in the form located in the cavity of the protective casing is shaped ledge for placement in the slot of the tool holder and a locking element for fixing the curved protrusion in the slot of the tool holder.

7. The crown on one of the PP.1 to 6, characterized in that it is made with zaborniak.

8. The crown on one of the PP.1 to 6, characterized in that Portorosa tools on the site each helix is installed with variable pitch destruction, the value of which decreases in the direction of sabunike.

9. The crown on the PP.1 to 7, characterized in that at least part of the housing of the crown has the shape of a truncated cone of revolution, the top of which is oriented in the direction of sabunike, with lots of screw lines on competition, which has the shape of a truncated cone.

 

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