An internal spray type horizontal axis roadheader cutting mechanism

Abstract

The present invention provides an internal spray type transverse axis type tunnel boring machine cutting mechanism, which belongs to the technical field of transverse axis type tunnel boring machine cutting mechanism, including a cutting arm, a transverse axis type cutting reducer and cutting drums symmetrically arranged on both sides of the transverse axis type cutting reducer; a cutting motor is arranged in the cutting arm; the transverse axis type cutting reducer is arranged at the front end of the cutting arm, including a reducer housing, a first helical gear, a second helical gear, a first bevel gear, a second bevel gear, a first sun gear, a first planetary gear, a first inner gear ring, a first planet carrier, a second sun gear, a second planetary gear, a second planetary carrier and a second gear ring. The above-mentioned internal spray type transverse axis type tunnel boring machine cutting mechanism can effectively reduce the risk of pressure water leaking into the reducer, and has a large transmission ratio.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting mechanisms of transverse-axis roadheaders, and specifically discloses an internal spraying type cutting mechanism of transverse-axis roadheaders. Background Art

[0002] At present, heavy-duty tunneling equipment should generally be equipped with a spray device during underground cutting operations to achieve the effects of cooling, dust removal, and spark prevention. The spray device of the longitudinal-axis tunneling machine is relatively mature, and the spray device of the horizontal-axis tunneling machine has gradually developed from external spray to the current internal spray. In comparison, the internal spray is more efficient than the external spray in actual application, but the fluid transmission path in the internal spray varies with the internal components of the cutting mechanism. At the same time, the transmission mode of the cutting mechanism is also closely related to the internal structure, and the nozzle position on the cutting drum is also very regulated. Efficient internal spray can timely cool the cutting teeth during cutting operations, effectively reduce the wear of the cutting teeth, and increase the service life.

[0003] CN201420476944.1 discloses a spray mechanism in a horizontal axis tunneling machine, including a water pipe, a reducer housing, a sealing sleeve, an output shaft, a cutting drum, a gear seat, and a nozzle. A sealing sleeve water hole is provided on the sealing sleeve, an output shaft is provided on the output shaft, a cutting drum cavity and a cutting drum pipe are provided on the cutting drum, a part of the water pipe is located in the reducer housing, and the other part of the water pipe passes through the reducer housing and is connected with the sealing sleeve water hole. One end of the output shaft pipe forms a sealed cavity with the water seal, the sealed cavity is connected with the sealing sleeve water hole, the other end of the output shaft pipe is connected with the cutting drum cavity, one end of the cutting drum pipe is connected with the cutting drum cavity, the other end of the cutting drum pipe is connected with the nozzle and the gear seat, a cutting tooth is fixed on the outer surface of the cutting drum through the gear seat, and the nozzle is fixed on the gear seat and faces the cutting tooth. In the above patent, the connection between the sealing sleeve and the output shaft is a dynamic connection, so a first sealing ring is used at the connection between the water pipe and the water hole of the sealing sleeve to prevent water leakage, and a second sealing ring is provided between the output shaft and the cutting drum to prevent water leakage in the cutting drum cavity. However, even if a sealing ring is used at the dynamic connection, the risk of pressure water leaking into the reducer is still very high. Summary of the invention

[0004] The object of the present invention is to provide an internal spray type horizontal axis roadheader cutting mechanism, which can effectively reduce the risk of pressure water leakage to the reducer and has a larger transmission ratio.

[0005] To achieve the above-mentioned purpose, the present invention provides an internal spray type horizontal axis type roadheader cutting mechanism, comprising a cutting arm, a horizontal axis type cutting reducer and cutting drums symmetrically arranged on both sides of the horizontal axis type cutting reducer; a cutting motor is arranged in the cutting arm; the horizontal axis type cutting reducer is arranged at the front end of the cutting arm, comprising a reducer housing, a first helical gear, a second helical gear, a first bevel gear, a second bevel gear, a first sun gear and a first planetary gear, a first inner gear ring, a first planet carrier, a second sun gear, a second planetary gear, a second planetary carrier and a second gear ring symmetrically arranged with the axis of the cutting arm as the symmetry axis ... a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting motor is arranged in the cutting arm; a cutting There is a water inlet, which is close to the axis of the cutting arm; the first bevel gear is fixedly connected to the output end of the cutting motor through a coupling; the second bevel gear is meshed with the first bevel gear and fixedly connected to the first bevel gear through a spline; the first bevel gear is meshed with the second bevel gear on the horizontal axis assembly; the second bevel gear is connected to the first sun gear through bolts; a plurality of the first planetary gears are arranged on the outside of the first sun gear and meshed with the first sun gear; the first inner gear ring is arranged on the outside of the plurality of first planetary gears, meshed with the first planetary gears, and fixed in the reducer housing; the first planet carrier is provided with a first wheel shaft rotatably connected to the first planetary gear; the second sun gear is meshed with the first bevel gear on the horizontal axis assembly; the first sun gear is meshed with the second bevel gear on the horizontal axis assembly; the second sun gear is connected to the first sun gear through bolts; the first sun gear is meshed with the first sun gear ... second sun gear is meshed with the first sun gear; the first sun gear is meshed with the first sun gear; the first sun gear is meshed with the first sun gear; the first sun gear is meshed with the first sun gear; the second sun gear is meshed with the first sun gear; the first sun gear is meshed with the first sun gear; the first sun gear is meshed with the first sun gear; the first sun gear is meshed with the first sun gear; the second sun gear is meshed with the first sun gear; the first sun gear is The positive gear is fixedly installed in the center hole of the first planetary carrier, and the plurality of the second planetary gears are arranged on the outside of the second sun gear and meshed with the second sun gear. The second axle is rotatably connected in the center hole of the second planetary gear, and the second axle is fixed on the second planetary carrier; the second planetary carrier is provided with a fluid channel, a gear ring shaft and a water-through shaft mounting hole, which are located on the outside of the second sun gear and are fixedly connected to the reducer housing; a first sealing ring is provided between the inlet of the fluid channel and the water inlet of the reducer housing, the water-through shaft mounting hole is arranged on the center line of the second planetary carrier, and a water-through shaft is fixed in the water-through shaft mounting hole; a water-through chamber is provided in the water-through shaft, and the shaft wall A water inlet is arranged on the top, and a second sealing ring is arranged between the water inlet and the outlet of the fluid channel; the second ring gear is arranged on the outside of the second planetary wheel and the second planetary carrier, meshed with the second planetary wheel, rotatably connected with the ring gear shaft of the second planetary carrier, and fixed in the cutting drum; a water distribution disk is arranged in the center of the cutting drum, a plurality of built-in water grooves connected with the water distribution disk are arranged in the cylinder wall, and cutting teeth and linear nozzles are arranged on the outer wall; a water distribution cavity is arranged in the water distribution disk, the water distribution cavity is connected with the water flow cavity, and the water distribution disk is sealed and rotatably connected with the water flow shaft; the built-in water groove is connected with the linear nozzle, and the linear nozzle sprays the fluid to the tooth tip of the corresponding cutting tooth.

[0006] Further, the linear nozzle is arranged in the middle area of ​​each spiral line of the cutting drum.

[0007] Furthermore, a stainless steel water pipe is welded in the built-in water tank; the stainless steel water pipe is connected to the linear nozzle.

[0008] Furthermore, the number of built-in sinks is 8.

[0009] Furthermore, a lubricating gear pump, a gear pump driving wheel and a gear pump driven wheel are arranged in the reducer housing; the gear pump driving wheel is fixed outside the first sun gear; the gear pump driven wheel is meshed with the gear pump driving wheel, driving the lubricating gear pump to pump lubricating oil into the cutting drum and the horizontal axis cutting reducer.

[0010] Furthermore, a connecting frame for connecting to a tunnel boring machine is provided at the rear end of the cutting arm.

[0011] Furthermore, a guard plate is provided on the cutting arm.

[0012] The internal spray type horizontal axis type tunnel boring machine cutting mechanism provided by the present invention has the following beneficial effects:

[0013] 1. Compared with CN201420476944.1, the present invention eliminates the sealing cavity, and the water required for internal spraying directly enters from the water inlet of the reducer housing to the fluid channel in the second planetary frame to the water distribution plate and then to each linear nozzle of the cutting drum, so that the reduction mechanism can be more closely matched (the cutting drum of the coal mining machine is usually cylindrical, and the cutting drum of the roadheader is usually conical. In comparison, the size of the roadheader drum is more limited). The water inlet of the reducer housing and the connection between the inlet of the fluid channel of the second planetary frame and the connection between the water shaft and the outlet of the fluid channel of the second planetary frame are all provided with sealing rings. All seals of the internal water channel of the horizontal axis cutting reducer are static seals. Compared with dynamic seals, static seals greatly reduce the risk of pressure water leaking into the horizontal axis cutting reducer.

[0014] 2. It adopts multiple gear meshing forms, one-stage helical gear, one-stage bevel gear, and two-stage planetary reduction, so that the input and output center axes are not on the same horizontal plane, and a large transmission ratio of 73.5 is obtained. In a limited space, the output torque is increased, and the cutting capacity is increased;

[0015] 3. The linear nozzle is mainly set up in the middle area of ​​each spiral line of the cutting drum, which contacts the coal rock at a higher cutting line speed and is more likely to generate sparks than other cutting areas. It can effectively spray water on the cutting teeth in the working part of the cutting drum, and not spray water on the rest, thus preventing water from spraying backwards;

[0016] 4. The lubricating gear pump, gear pump driving wheel and gear pump driven wheel are all located inside the horizontal axis cutting reducer. The gear pump driving wheel is coaxial with the second bevel gear and can drive the gear pump driven wheel to drive the gear pump, so as to realize the circulation of lubricating oil inside the reducer and ensure the lubrication performance at all levels. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the cutting mechanism of the internal spray type horizontal axis roadheader;

[0018] Figure 2It is a top view of the cutting mechanism of the internal spray type horizontal axis roadheader;

[0019] Figure 3 This is the internal structure diagram of the horizontal axis cutting reducer;

[0020] Figure 4 The figure is the internal structure diagram of the cutting drum;

[0021] Figure 5 It is a cross-sectional view of the cutting mechanism of the internal spray type horizontal axis roadheader parallel to the axis of the cutting arm;

[0022] Figure 6 This is a layout diagram for a built-in sink;

[0023] Figure 7 It is a schematic diagram of the structure of the cutting drum;

[0024] Figure 8 Schematic diagram of bevel gear meshing.

[0025] The names corresponding to the reference numerals are:

[0026] 1-cutting arm; 2-transverse axis cutting reducer; 3-cutting drum; 4-connecting frame; 5-guard plate; 6-cutting motor; 7-first helical gear; 8-second helical gear; 9-first bevel gear; 10-second bevel gear; 11-first sun gear; 12-gear pump driving wheel; 13-gear pump assembly including gear pump driven wheel; 14-first planetary gear; 15-first inner ring gear; 16-first planetary carrier; 17-second sun gear; 18-second planetary gear; 18.1-second wheel shaft; 19-second planetary carrier; 20-second ring gear; 21-reducer housing; 22-water inlet; 23-first sealing ring; 24-water shaft; 25-second sealing ring; 26-water distribution tray; 27-built-in water tank; 28-stainless steel water pipe; 29-linear nozzle; 30-cutting teeth. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The present embodiment provides an internal spray type horizontal axis type roadheader cutting mechanism, comprising a cutting arm 1, a horizontal axis type cutting reducer 2 and cutting drums 3 symmetrically arranged on both sides of the horizontal axis type cutting reducer 2; a connecting frame 4 for connecting with the roadheader is arranged at the rear end of the cutting arm 1; a guard plate 5 is arranged on the cutting arm 1; a cutting motor 6 is arranged in the cutting arm 1; the horizontal axis type cutting reducer 2 is arranged at the front end of the cutting arm 1, and comprises a reducer housing 21, a first bevel gear 7, a second bevel gear 8, a first bevel gear 9, The second bevel gear 10, the first sun gear 11, the gear pump driving wheel 12, the gear pump assembly 13 including the gear pump driven wheel, and the first planetary gear 14, the first inner ring gear 15, the first planetary carrier 16, the second sun gear 17, the second planetary gear 18, the second planetary carrier 19 and the second ring gear 20 are symmetrically arranged with the axis of the cutting arm as the symmetry axis; the reducer housing 21 is provided with a water inlet 22, and the water inlet 22 is close to the axis of the cutting arm 1; the first bevel gear 7 is fixed to the output end of the cutting motor 6 through a coupling. The first bevel gear 9 is meshed with the second bevel gear 10; the second bevel gear 10 and the gear pump driving wheel 12 are fixed on the first sun gear 11 to form a transverse axis assembly; a plurality of the first planetary gears 14 are arranged on the outside of the first sun gear 11 and mesh with the first sun gear 11; the first inner ring 15 is sleeved on the outside of the plurality of first planetary gears 14, meshed with the first planetary gears 14, and fixed in the reducer housing 21; the first planetary carrier 16 rotates with the first planetary gear 14, and the first planetary gear 14 is mounted on the first planetary carrier 16 through a bearing; the second sun gear 17 is fixedly penetrated in the center hole of the first planetary carrier 16, extends into the first sun gear 11 and is clearance-matched with the first sun gear 11, and a plurality of the second planetary gears 18 are arranged on the outside of the second sun gear 17 and mesh with the second sun gear 17. The center hole of the second planetary gear 18 is rotatably connected with a second wheel shaft 18.1 through a bearing, and the second wheel shaft 18.1 is fixed on the second planetary carrier 19; the second planetary carrier 19 is provided with a fluid channel, a ring gear shaft and a water-passing shaft mounting hole, is located on the outer side of the second sun gear 17, and is fixedly connected to the reducer housing 21; a first sealing ring 23 is provided between the inlet of the fluid channel and the water inlet 22 of the reducer housing 21; the water-passing shaft mounting hole is provided on the center line of the second planetary carrier 19, and a water-passing shaft 24 is fixed in the water-passing shaft mounting hole; a water-passing cavity is provided in the water-passing shaft 24, a water inlet is provided on the shaft wall, and a second sealing ring 25 is provided between the water inlet and the outlet of the fluid channel; the second ring gear 20 is provided on the outer side of the second planetary gear 18 and the second planetary carrier 19, meshes with the second planetary gear 18, and meshes with the second planetary carrier The gear ring shaft 19 is rotatably connected through a bearing and fixed in the cutting drum 3; a water distribution plate 26 is arranged in the center of the cutting drum 3, and a plurality of built-in water grooves 27 connected to the water distribution plate 26 are arranged in the wall of the drum, and a linear nozzle 29 and a cutting tooth 30 are arranged on the outer wall; a water distribution cavity is arranged in the water distribution plate 26, and the water distribution cavity is connected with the water passage cavity, and the water distribution plate 26 is sealed and rotatably connected with the water passage shaft 24; the built-in water groove 27 is connected with the linear nozzle 29, and the linear nozzle 29 sprays the fluid to the tooth tip of the corresponding cutting tooth 30; the driven wheel of the gear pump is meshed with the driving wheel 12 of the gear pump, driving the lubricating gear pump arranged in the reducer housing 21 to work, and pumping lubricating oil into the cutting drum 3 and the horizontal axis cutting reducer 2. .

[0029] The working principle of the cutting drum 3 of the cutting mechanism of the above-mentioned internal spray type horizontal axis roadheader is as follows: the cutting motor 6 outputs power, and drives the second bevel gears 10 on both sides through the first bevel gear 7, the second bevel gear 8, and the first bevel gear 9 respectively, and the first sun gear 11 and the gear pump driving wheel 12 coaxial with the second bevel gear 10 rotate, the first sun gear 11 drives the first planetary gear 14 to rotate, the first planetary gear 14 drives the first planetary carrier 16 to rotate, and the second sun gear 17 fixed in the center hole of the first planetary carrier 16 rotates accordingly, the second sun gear 17 drives the second planetary gear 18 to rotate, and the second ring gear 20 meshing with the second planetary gear 18 rotates with the second planetary gear 18, driving the cutting drum 3 to rotate, and the first inner ring gear 15 and the second planetary carrier 19 do not rotate.

[0030] The internal spray working principle of the above-mentioned internal spray type horizontal axis type tunnel boring machine cutting mechanism is as follows: the external fluid enters from the left and right water inlets 22 (first sealing ring 23) at the upper end of the reducer housing 21, and then passes through the water outlets (second sealing ring 25) of the fluid channels of the left and right second planetary carriers 19 (idler carrier) in the horizontal axis type cutting reducer 2 to the water shaft 24, and enters the water distribution plate 26 through the water shaft 24. The water distribution plate 26 is then divided to each linear nozzle 29 through the built-in water tank 27 in the left and right cutting drums 3, and then the linear nozzle 29 sprays water to the corresponding cutting tooth tip to achieve the cooling and dust removal effect during the cutting operation. The two ends of the fluid channel in the second planetary carrier 19 are connected at both ends with sealing rings (O-type sealing rings are used in this embodiment) to improve the sealing performance. At the same time, the fluid flows from the statically fixed second planetary carrier 19, which greatly reduces dynamic interference. The fluid channel is formed by drilling holes in the statically fixed second planetary carrier 19, and the redundant holes are welded to achieve a sealed and watertight state.

[0031] The existing internal spray mechanism of the horizontal axis roadheader adopts full spraying of the entire cutting head, and half of the nozzles will spray water toward the unit or even the operator, which cannot achieve the desired effect. The internal spray type horizontal axis roadheader cutting mechanism provided in this embodiment sets the linear nozzle 29 in the middle area of ​​each spiral line of the cutting drum 3, which contacts the coal rock at a larger cutting line speed, is more likely to generate sparks than other cutting tooth areas, and is more targeted.

[0032] Furthermore, a stainless steel water pipe 28 is welded inside the built-in water tank 27 ; the stainless steel water pipe 28 is connected to the linear nozzle 29 .

[0033] Furthermore, the number of built-in water tanks 27 is 8.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An internal spray type horizontal axis roadheader cutting mechanism, characterized in that: It includes a cutting arm, a transverse-axis cutting reducer, and cutting drums symmetrically arranged on both sides of the transverse-axis cutting reducer; A cutting motor is arranged in the cutting arm; The transverse axis cutting reducer is arranged at the front end of the cutting arm, and includes a reducer housing, a first helical gear, a second helical gear, a first bevel gear, a second bevel gear, a first sun gear, and a first planetary gear, a first inner gear ring, a first planetary carrier, a second sun gear, a second planetary gear, a second planetary carrier and a second gear ring that are symmetrically arranged with the axis of the cutting arm as the symmetry axis; The reducer housing is provided with a water inlet, which is close to the axis of the cutting arm; The first bevel gear is fixedly connected to the output end of the cutting motor through a coupling; The second helical gear is meshed with the first helical gear and is fixedly connected to the first bevel gear via a spline; The first bevel gear is meshed with the second bevel gear; The second bevel gear is fixed on the first sun gear; The plurality of first planetary gears are arranged outside the first sun gear and mesh with the first sun gear; The first inner gear ring is sleeved on the outer sides of the plurality of first planetary gears, meshed with the first planetary gears, and fixed in the reducer housing; The first planet carrier rotates with the first planet gear, and the first planet gear is mounted on the first planet carrier through a bearing; The second sun gear is fixedly arranged in the center hole of the first planet carrier; A plurality of the second planetary gears are arranged outside the second sun gear and mesh with the second sun gear. A second axle is rotatably connected in the center hole of the second planetary gear, and the second axle is fixed on the second planet carrier. The second planet carrier is provided with a fluid channel, a ring gear shaft and a water-passing shaft mounting hole, is located on the outside of the second sun gear, and is fixedly connected to the reducer housing. A first sealing ring is provided between the inlet of the fluid channel and the water inlet of the reducer housing. The water-passing shaft mounting hole is provided on the center line of the second planet carrier, and the water-passing shaft is fixed in the water-passing shaft mounting hole. A water passage cavity is provided in the water passage shaft, a water inlet is provided on the shaft wall, and a second sealing ring is provided between the water inlet and the outlet of the fluid channel; The second ring gear is arranged outside the second planetary gear and the second planetary carrier, meshes with the second planetary gear, is rotatably connected to the ring gear shaft of the second planetary carrier, and is fixed in the cutting drum; A water distribution tray is arranged at the center of the cutting drum, a plurality of built-in water grooves connected to the water distribution tray are arranged inside the drum wall, and cutting teeth and linear nozzles are arranged on the outer wall; The water distribution plate is provided with a water distribution cavity, the water distribution cavity is communicated with the water flow cavity, and the water distribution plate is sealed and rotatably connected with the water flow shaft; The built-in water tank is communicated with the linear nozzle, and the linear nozzle sprays the fluid to the tooth tip of the corresponding pick.

2. The internal spray type horizontal axis roadheader cutting mechanism according to claim 1, characterized in that: The linear nozzles are arranged in the middle area of ​​each spiral line of the cutting drum.

3. The internal spray type horizontal axis roadheader cutting mechanism according to claim 2, characterized in that: Stainless steel water pipes are welded inside the built-in water tank; The stainless steel water pipe is connected to the linear nozzle.

4. The internal spray type horizontal axis roadheader cutting mechanism according to claim 3, characterized in that: The number of the built-in water tanks is 8.

5. The internal spray type horizontal axis roadheader cutting mechanism according to any one of claims 1 to 4, characterized in that: A lubricating gear pump, a gear pump driving wheel and a gear pump driven wheel are arranged in the reducer housing; The gear pump driving wheel is fixed outside the first sun gear; The driven wheel of the gear pump meshes with the driving wheel of the gear pump, driving the lubricating gear pump to pump lubricating oil into the cutting drum and the horizontal axis cutting reducer.

6. The internal spray type horizontal axis roadheader cutting mechanism according to claim 5, characterized in that: The rear end of the cutting arm is provided with a connecting frame for connecting with the tunnel boring machine.

7. The internal spray type horizontal axis roadheader cutting mechanism according to claim 6, characterized in that: A guard plate is arranged on the cutting arm.

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