Rotary directional spray porting mechanism

Abstract

The present application relates to a kind of rotary orientation spray flow distribution mechanism, including flow distribution disc and mutually fixed inner race, outer race, wear pad, wear pad is embedded in the recess in the middle of the front end of inner race, the front part of flow distribution disc and rear disc-shaped part are located in the front central through hole and rear disc-shaped recess of outer race respectively, rotary water seal is arranged between shaft-like part and outer race, the back end surface of disc-shaped part is provided with crescent-shaped water channel, multiple first water through holes of wear pad, which are axially through, are one-to-one corresponding and communicated with the inlet of water channel radially distributed in inner race, and part of first water through holes are communicated with crescent-shaped water channel, flow distribution disc is attached with wear pad, water pressure cavity is formed between wear pad, flow distribution disc and disc-shaped recess, the second water through hole of water inlet hole of flow distribution disc and crescent-shaped water channel is communicated with water pressure cavity.The present application can make inner spray system always spray towards the cutting area forward, while solving cutting area dust suppression, tool cooling and avoiding operator being sprayed by water problem.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of directional spray flow distribution mechanism, can be used in coal mine with horizontal shaft cutting mechanism, belong to coal mining equipment technical field. BACKGROUND

[0002] Traditional coal mine heading machine horizontal shaft cutting mechanism such as horizontal shaft heading machine, combined mining machine, excavating anchor machine etc., either without internal spray system, cannot inhibit the dust generated when cutting, cause air environment deterioration, also cannot cool cutting tool, cause tool wear increase;Or the internal spray system used has spray forward and backward, the operator located rear side is also in the spray range, causes operator to be watered. SUMMARY

[0003] The purpose of the present application is to provide a kind of rotary directional spray flow distribution mechanism, can make internal spray system always spray towards forward cutting area, while solve the problems of dust suppression in cutting area, tool cooling and avoid operator to be watered.

[0004] The main technical scheme of the present application has:

[0005] A kind of rotary directional spray flow distribution mechanism, including flow distribution disc and mutually fixed connection inner race, outer race and wear pad, the inner race is equipped with multiple water channels in 360 degree circumferential range and is distributed in radial, the inlet of water channel is located on the groove bottom surface of the middle recess in the front end of inner race, the outlet of water channel is located on the outer cylindrical surface of inner race, wear pad is embedded in the middle recess, and multiple first water through holes are provided on wear pad, the first water through hole is one-to-one correspondence and communicated with the inlet of water channel, the front and rear of outer race are equipped with central through hole and disc-shaped recess communicated with the central through hole respectively, the front and rear of flow distribution disc are shaft portion and disc portion respectively, and they are located in central through hole and disc-shaped recess respectively, shaft portion is installed in central through hole by shaft sleeve, and rotary water seal is arranged between shaft portion and outer race, the rear end surface of flow distribution disc keeps adhering to the front end surface of wear pad under the action of axial external force, forms end surface sealing structure, disc portion keeps interval with disc-shaped recess, water pressure cavity is formed between wear pad, flow distribution disc and disc-shaped recess, shaft portion is equipped with water inlet hole, the inlet of water inlet hole is located on the front end surface of shaft portion, the outlet of water inlet hole is located on the outer cylindrical surface of the rear part of shaft portion, and is communicated with the water pressure cavity, disc portion is equipped with second water through hole, a segment of crescent water through groove is provided on the rear end surface of disc portion, when flow distribution disc is at any angular position relative to wear pad, there is always a part of first water through hole communicated with the water through groove, the water through groove is communicated with water pressure cavity through second water through hole.

[0006] The crescent water through groove is a segment of circular arc groove, and the center of the circular arc groove is located on the central axis of the radial distribution of all water channels.

[0007] The rotating directional spray flow distribution mechanism further comprises a floating tube and a water inlet seat, the front and rear ends of the floating tube are coaxially connected with the water inlet seat and the flow distribution disc respectively, and seals are arranged at the connecting positions, and the through hole in the water inlet seat, the through hole in the floating tube and the water inlet hole in the flow distribution disc are sequentially communicated.

[0008] The connection mode of the floating tube with the water inlet seat and the flow distribution disc is preferably circumferential fixation, axial and radial floating.

[0009] The connection position of the floating tube with the flow distribution disc and the water inlet seat is preferably sealed by a double-seal structure.

[0010] The front and rear ends of the floating tube are respectively inserted into corresponding holes in the end portions of the flow distribution disc and the water inlet seat, and form shaft hole gap cooperation with the corresponding holes, a sealing groove is arranged on the shaft diameter of the shaft hole gap cooperation position, and a sealing element is arranged in the sealing groove.

[0011] The front and rear ends of the floating tube are both machined to have two plane structures parallel to and symmetrical with the axis of the floating tube, one end of the flow distribution disc and the water inlet seat connected with the floating tube is machined to have a special-shaped hole structure matched with the corresponding end head of the floating tube, and the plane directions of the plane structures at the front and rear ends of the floating tube are perpendicular to each other.

[0012] A sleeve and an end cover can be sequentially sleeved between the outer floating tube and the outer seat ring to the water inlet seat, the end cover is threadedly connected to the rear end of the water inlet seat, a radially outwardly extending ring table is arranged on the sleeve close to the rear end, a spring is sleeved outside the sleeve, in the installed state, the spring is in a compressed state and abuts between the front end face of the ring table and the rear end face of the end cover, the rear end of the sleeve is pressed on the front end face of the flow distribution disc, the front end of the sleeve is not in contact with the end cover, and the distance between the axial limiting structures of the flow distribution disc and the water inlet seat is greater than the total length of the corresponding shaft section of the floating tube.

[0013] The beneficial effects of the present application are:

[0014] The present application is used in the internal spray system of the horizontal shaft type cutting mechanism of the coal mining equipment, and the directional spray function can be realized. The internal spray system is controlled to spray to the front working area of the horizontal shaft type cutting mechanism, which can not only play a dust removal role, but also play a role of cooling the cutting tool, improves the construction working environment, reduces the consumption of the tool, and avoids the rear operator from being sprayed with water, and improves the human working environment.

[0015] The double-seal structure arranged at the two ends of the floating tube can ensure normal sealing performance in the case that the two ends are not concentric.

[0016] The present application can eliminate the influence of part machining error, work load impact and other factors on sealing performance, and can significantly improve the sealing performance and the service life of the sealing structure. The present application can ensure the close contact between the flow distribution disc and the wear-resistant pad, and can avoid the jumping and wandering of the friction contact surface caused by the size error and the impact of the working mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the assembly structure diagram of an embodiment of the present application;

[0018] Figure 2 is the three-dimensional structure diagram of an embodiment of the flow distribution disc;

[0019] Figure 3 is the assembly structure explosion diagram of the flow distribution disc, the floating tube and the water inlet seat.

[0020] Reference signs:

[0021] 1. inner race, 1-1. water channel; 2. wear-resistant pad, 2-1. first water through hole, 3. flow distribution disc, 3-1. water inlet hole, 3-2. second water through hole, 3-3. water through groove, 3-4. third water through hole, 4. floating tube, 4-1. flat structure, 4-2. sealing groove, 5. water inlet seat, 6. outer race, 8. rotary water seal, 9. water pressure cavity, 10. sleeve, 11. end cover, 12. spring. DETAILED DESCRIPTION

[0022] The present application discloses a rotary directional spray flow distribution mechanism, as shown in Figures 1-3As shown, the inner race 1, the outer race 6, the wear pad 2 and the flow distribution disc 3 are all rotary parts, wherein the inner race, the outer race and the wear pad are fixed to each other. The inner race and the outer race are fixed by bolts, the front end surface of the inner race and the rear end surface of the outer race are in close contact and sealed, and the inner race and the wear pad can be connected by a pin to prevent the wear pad from rotating relative to the inner race. The inner race is provided with a plurality of water channels 1-1 radially distributed within a 360-degree circumferential range, the inlet of the water channel is located on the groove bottom surface of the middle recess at the front end of the inner race, and the outlet of the water channel is located on the outer cylindrical surface of the inner race. The wear pad is embedded in the middle recess, and a plurality of first water through holes 2-1 are provided on the wear pad, which correspond to and communicate with the inlets of the water channels. The front and rear of the outer race are respectively provided with a central through hole and a disc-shaped recess communicating with the central through hole, and the front and rear of the flow distribution disc are respectively a shaft-shaped part and a disc-shaped part, which are located in the central through hole and the disc-shaped recess respectively, the shaft-shaped part is installed in the central through hole through a shaft sleeve, and a rotating water seal 8 is arranged between the shaft-shaped part and the outer race. The rear end surface of the flow distribution disc is in close contact with the front end surface of the wear pad under the action of an axial external force, forming an end face sealing structure, while the disc-shaped part is kept apart from the disc-shaped recess, and a water pressure chamber 9 is formed between the wear pad, the flow distribution disc and the disc-shaped recess. The shaft-shaped part is provided with a water inlet hole 3-1, the inlet of the water inlet hole is located on the front end surface of the shaft-shaped part, and the outlet of the water inlet hole is located on the outer cylindrical surface of the rear part of the shaft-shaped part and communicates with the water pressure chamber 9. The disc-shaped part is provided with a second water through hole 3-2, and a crescent-shaped water through groove 3-3 is provided on the rear end surface of the disc-shaped part, the shape, size and position of the water through groove should be set so that no matter where the flow distribution disc is located in the circumferential direction relative to the wear pad, there is always a part (at least one, but not all) of the first water through holes on the wear pad that communicates with the water through groove at the same time. The end face sealing between the flow distribution disc and the wear pad is located around the water through groove, which is used to maintain the sealing performance of the junction between the first water through hole and the water through groove. The water through groove communicates with the water pressure chamber 9 through the second water through hole 3-3. Water enters the water pressure chamber 9 from the front end surface of the flow distribution disc through the water inlet hole 3-1, then enters the part of the first water through holes that communicates with the water through groove through the second water through hole and the water through groove, thereby introducing water into the water channel corresponding to this part of the first water through hole, and this part of the water channel supplies water to the corresponding nozzle of the inner spray system installed on the inner race, and this part of the nozzle can implement spraying, while the remaining part of the first water through hole that does not communicate with the water through groove is closed, and the water channel and the nozzle corresponding to it cannot be supplied with water, so they will not spray outward.

[0023] The inner and outer races and wear pads rotate together with the horizontal shaft cutting mechanism, and the flow distribution disc does not rotate. During rotation of the entire horizontal shaft cutting mechanism, the water channels in the crescent-shaped water passage area of the flow distribution disc are open, and the water channels in other areas are closed. Each water channel is only open when it rotates to the water passage area, and ultimately forms a directional flow distribution spray during rotation of the horizontal shaft cutting mechanism. The direction of the directional inner spray is determined by the direction, i.e. the angular position, of the crescent-shaped water passage of the flow distribution disc, and the spray coverage angle of the directional inner spray is determined by the arc length or included angle of the crescent-shaped water passage of the flow distribution disc, which can be, for example, 120 degrees, 180 degrees or 90 degrees, etc. The longer the arc length or the greater the included angle, the more water channels are in the open state. By controlling the opening and closing of the water channels in a specific direction and angle range, the function of rotating directional spray flow distribution can be achieved.

[0024] The crescent-shaped water passage can be a circular arc-shaped groove, and the center of the circular arc-shaped groove is located on the central axis on which the water channels are distributed radially. The water channels and water passage holes are preferably uniformly distributed in the circumferential direction, and the number thereof can be set as required, for example, 12 or 15.

[0025] Further, a recess structure is arranged beside the crescent-shaped water passage 3-3 in the middle of the rear end surface of the disc-shaped part, the bottom of the recess is a reverse thrust surface, and a third water passage hole 3-4 is arranged on the bottom of the recess, which is in communication with the water pressure cavity 9 and is used to introduce water to the rear of the disc-shaped part. The water pressure acting on the reverse thrust surface at the rear of the disc-shaped part generates a rightward thrust force on the flow distribution disc, which can balance part of the leftward pressure of the water in the water pressure cavity on the flow distribution disc, so that the pressure on the wear pad is reduced under the premise that the flow distribution disc still closely adheres to the wear pad.

[0026] The rotating directional spray flow distribution mechanism can further include a floating pipe 4 and a water inlet seat 5, the front and rear ends of the floating pipe are coaxially connected to the water inlet seat and the flow distribution disc respectively, and seals are arranged at the connection positions. The through holes in the water inlet seat, the through holes in the floating pipe and the water inlet holes in the flow distribution disc are sequentially connected to form a water supply channel.

[0027] The connection mode of the floating pipe with the water inlet seat and the flow distribution disc is circumferential fixation and axial and radial floating.

[0028] The connection position of the floating pipe with the flow distribution disc and the water inlet seat preferably adopts a double-seal structure for sealing. In the case of a certain coaxiality error, a good sealing effect can still be achieved, which can ensure the sealing performance of the internal water supply channel.

[0029] The front and rear ends of the floating tube are respectively inserted into corresponding holes in the end of the distribution disc and the water inlet seat, and form a shaft hole gap fit with the corresponding hole, so that the floating tube can be freely floating in the radial direction relative to the distribution disc and the water inlet seat, allowing a small deflection angle between the floating tube and the distribution disc and the water inlet seat. A sealing groove 4-2 is provided on the shaft diameter of the shaft hole gap fit, and a sealing element is provided in the sealing groove.

[0030] The front and rear ends of the floating tube are respectively inserted into corresponding holes in the end of the distribution disc and the water inlet seat, and form a shaft hole gap fit with the corresponding hole, so that the floating tube can be freely floating in the radial direction relative to the distribution disc and the water inlet seat, allowing a small deflection angle between the floating tube and the distribution disc and the water inlet seat. A sealing groove 4-2 is provided on the shaft diameter of the shaft hole gap fit, and a sealing element is provided in the sealing groove.

[0031] The plane direction of the plane structure at the front and rear ends of the floating tube is preferably perpendicular to each other, for example Figure 3 When the plane structure at the front end is horizontal, the plane structure at the rear end is vertical, and correspondingly, a horizontal plane is provided in the hole structure at the rear end of the water inlet seat, and a vertical plane is provided in the hole structure at the front end of the distribution disc, which can further ensure that the distribution disc and the water inlet seat are strictly relatively stationary in the circumferential direction. At the same time, since the plane structure does not affect the small vertical movement between the floating tube and the distribution disc, nor does it affect the small horizontal radial movement between the floating tube and the water inlet seat, therefore the radial offset of the distribution disc relative to the water inlet seat is not affected for the assembly unit composed of the distribution disc, the floating tube and the water inlet seat. The plane structure is usually achieved by milling.

[0032] A sleeve 10 and an end cover 11 are sequentially provided outside the floating tube and between the outer race and the water inlet seat, the end cover is threadedly connected to the rear end of the water inlet seat, the sleeve is provided with a radially outwardly extending ring table near the rear end, and a spring 12 is provided outside the sleeve. In the installed state, the spring is in a compressed state and abuts between the front end surface of the ring table and the rear end surface of the end cover, the rear end of the sleeve is pressed against the front end surface of the distribution disc under the action of the spring, and the front end of the sleeve does not contact the end cover, so that the distribution disc is always pressed against the front end surface of the wear-resistant pad by the spring force. Usually, the rear end of the sleeve does not contact the outer race.

[0033] The distance between the structure (usually the annular end face at the junction of the stepped hole) for axially limiting the floating pipe in the flow distribution disc and the water inlet seat is slightly larger than the total length of the corresponding shaft section of the floating pipe in the installed state, that is, a certain axial gap is usually reserved between the structure for axially limiting the floating pipe in the flow distribution disc and the water inlet seat and the corresponding structure of the floating pipe, so that the floating pipe can freely move in the axial direction, thereby realizing the axial floating.

[0034] The inner and outer races and the water inlet seat are respectively installed on two different mechanisms that can relatively rotate, and the relative positions of the two mechanisms will change when the transverse shaft type cutting mechanism is impacted due to working load. Due to the axial and radial floating characteristics of the floating pipe, the position change can be absorbed by the automatic deflection and movement of the floating pipe, and will not be transmitted to the flow distribution disc, thereby ensuring the close fit between the flow distribution disc and the wear pad, guaranteeing the sealing effect, and enabling the flow sealing part to always work normally.

[0035] Due to the axial and radial floating characteristics of the floating pipe, the flow distribution mechanism of the present application can adapt to a certain degree of eccentricity between the flow distribution disc and the water inlet seat, and can also avoid the jumping and wandering of the friction contact surface between the flow distribution disc and the wear pad due to the dimensional error of the parts.

[0036] The rear end face of the flow distribution disc is preferably kept in close fit with the front end face of the wear pad under the action of the axial spring force and the water pressure, and an end face sealing structure is formed between the flow distribution disc and the wear pad. After the friction surface is worn, it can be automatically compensated under the action of the water pressure and the spring force, greatly improving the service life of the flow distribution mechanism.

[0037] The present application can be used for realizing rotary directional spraying of transverse shaft type cutting mechanisms such as the cutting head of a cantilever transverse shaft tunneling machine, the drum of a combined mining machine, the drum of a digging and anchoring machine, etc., and solves the problems of dust suppression in the cutting area, cutter cooling, and avoiding water spraying on the operator, etc.

[0038] As used herein, front and rear correspond to right and left, respectively. Figure 1 right and left.

Claims

1. A rotational orientation spray flow mechanism characterized by: The device comprises a flow distribution disc, an inner race, an outer race and a wear pad fixedly connected with each other, a floating tube and a water inlet seat, the inner race is internally provided with a plurality of water channels distributed in a radial manner within a 360-degree circumferential range, the inlet of the water channel is located on the bottom surface of a middle groove at the front end of the inner race, the outlet of the water channel is located on the outer cylindrical surface of the inner race, the wear pad is embedded in the middle groove, a plurality of first water passing holes are provided on the wear pad and axially penetrate the wear pad, the first water passing holes correspond to and communicate with the inlets of the water channels one by one, the front and rear of the outer race are respectively provided with a central through hole and a disc-shaped groove in communication with the central through hole, the front and rear of the flow distribution disc are respectively an axial part and a disc part, which are respectively located in the central through hole and the disc-shaped groove, the axial part is installed in the central through hole through a shaft sleeve, a rotating water seal is arranged between the axial part and the outer race, the rear end surface of the flow distribution disc is kept in close contact with the front end surface of the wear pad under the action of an axial external force, forming an end face sealing structure, the disc part is kept spaced apart from the disc-shaped groove, a water pressure cavity is formed between the wear pad, the flow distribution disc and the disc-shaped groove, the axial part is provided with a water inlet hole, the inlet of the water inlet hole is located on the front end surface of the axial part, the outlet of the water inlet hole is located on the outer cylindrical surface of the rear part of the axial part and communicates with the water pressure cavity, the disc part is provided with a second water passing hole, a crescent-shaped water passing groove is provided on the rear end surface of the disc part, when the flow distribution disc is at any angular position relative to the wear pad, a part of the first water passing holes always communicates with the crescent-shaped water passing groove, the crescent-shaped water passing groove communicates with the water pressure cavity through the second water passing hole, the floating tube is connected with the water inlet seat and the flow distribution disc in a circumferential fixed, axial and radial floating manner, the front and rear ends of the floating tube are coaxially connected with the water inlet seat and the flow distribution disc respectively, and seals are arranged at the connection positions, the through hole in the water inlet seat, the through hole in the floating tube and the water inlet hole are sequentially communicated, the front and rear ends of the floating tube are respectively inserted into the corresponding holes in the end part of the flow distribution disc and the water inlet seat and form shaft hole gap cooperation with the corresponding holes, a sealing groove is arranged on the shaft diameter of the shaft hole gap cooperation position, a sealing element is arranged in the sealing groove, the spacing of the axial limiting structures of the flow distribution disc and the water inlet seat and the floating tube is greater than the total length of the corresponding shaft section of the floating tube, the front and rear ends of the floating tube are both machined to have two plane structures parallel to and symmetrical with the axis of the floating tube, one end of the flow distribution disc and the water inlet seat connected with the floating tube is machined to have a special-shaped hole structure matched with the corresponding end head of the floating tube in a conformal plug-in manner, and the plane directions of the plane structures at the front and rear ends of the floating tube are perpendicular to each other.

2. The rotational orientation spray flow mechanism of claim 1, wherein: The crescent-shaped water passing groove is a circular arc groove, and the center of the circular arc groove is located on the central axis of the radial distribution of all the water channels.

3. The rotational directional spray flow mechanism of claim 2, wherein: Double sealing structures are used for sealing at the connection positions of the floating tube and the flow distribution disc and the water inlet seat.

4. A rotational directional spray flow mechanism as claimed in claim 2 or 3, wherein: The floating pipe is externally sleeved with a sleeve and an end cover in sequence between the outer race and the water inlet seat, the end cover is threadedly connected on the rear end of the water inlet seat, a radially outwardly extending ring table is arranged on the sleeve close to the rear end, a spring is externally sleeved on the sleeve, in the installed state, the spring is in compression state and abuts between the front end surface of the ring table and the rear end surface of the end cover, the rear end of the sleeve is pressed on the front end surface of the distribution disc, and the front end of the sleeve is not in contact with the end cover.

5. The rotational directional spray flow mechanism of claim 1, 2 or 3, wherein: The axial external force includes spring force and water pressure.

6. The rotational directional spray flow mechanism of claim 4, wherein: The axial external force includes spring force and water pressure.

7. The rotational directional spray flow mechanism of claim 6, wherein: The shaft-shaped part is supported in the central through hole through two front and rear shaft sleeves, and the rotating water seal is arranged between the two shaft sleeves.

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