Cooling and dedusting system for rocker arm of coal mining machine and coal mining machine

Abstract

The invention discloses a coal mining machine rocker arm cooling and dust removing system which is used for cooling and dust removing of a floating sealing assembly in a labyrinth cavity between a planetary mechanism of a coal mining machine rocker arm and a roller connecting sleeve and comprises a cooling water channel penetrating through a bearing seat and a gland of the planetary mechanism along a preset path. The cooling water guide pipe is used for guiding cooling water to the labyrinth cavity, so that the floating sealing assembly is cooled and dedusted through the cooling water; the water passing sleeve is connected between the bearing seat and the gland and is used for conducting the cooling water channel; and the sealing assembly is arranged between the water passing sleeve and the bearing seat and / or the gland and is used for sealing the cooling water. The cooling dust removal system is arranged at the rocker arm final-stage transmission system, the rocker arm floating sealing assembly can be cooled, the rocker arm power can be maximized, the dust removal purpose can be achieved, and the service life of the coal mining machine rocker arm is prolonged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mining machine, and particularly relates to a coal mining machine rocker arm cooling and dust removal system and a coal mining machine. BACKGROUND

[0002] The existing coal mining machine rocker arm cutting head often has oil leakage phenomenon, and in severe cases, it can cause high-temperature engagement of the rocker arm internal transmission system gear, or bearing seizure, gear tooth, and other major failures, which seriously affects the quality of the coal mining machine, and also affects the mine output, and has large economic losses. The reason is that the existing electric traction coal mining machine rocker arm cutting head adopts a floating oil seal structure in the form of end face axial sealing, which requires stable working gap value and stable contact pressure, but it is difficult to achieve.

[0003] For example, when the coal mining machine rocker arm is working, the last stage floating sealing ring of the rocker arm transmission system is prone to uneven lubrication, resulting in a higher local temperature, and then conducting heat to the O-shaped ring, which is prone to aging and losing elasticity in a long-term high-temperature environment, resulting in sealing failure and rocker arm oil leakage. Figure 1 As shown in the figure, the engagement structure of the rocker arm floating sealing system in the axial direction is shown, and the engagement area of the floating sealing moving and static ring is within two circles, which is divided into K1 area and K2 area with the oil line as the boundary. As can be seen, the K1 area is within the oil, which has good lubrication; and the K2 area is outside the oil, and can only rely on the rotation of the moving ring to bring the oil to the upper part, and has poor lubrication performance, especially the K20 area, which has the worst lubrication performance and the highest temperature.

[0004] In addition, as shown in the figure, due to the harsh working environment of the rocker arm, the coal seam is easy to enter the outside of the floating sealing cavity, and if not cleaned, the coal dust will accumulate outside the floating sealing cavity, occupying the rebound area of the O-shaped ring, so that the O-shaped ring is in a long-term extrusion state, reducing the service life. Figure 2 SUMMARY

[0005] The present application aims at the deficiencies of the prior art, and provides a coal mining machine rocker arm cooling and dust removal system and a coal mining machine, which can cool the rocker arm floating sealing assembly and maximize the rocker arm power to achieve the purpose of dust removal, and improve the service life of the coal mining machine rocker arm.

[0006] ​The application provides a shearer rocker arm cooling and dust removal system, which is used for cooling and dust removal of a floating sealing assembly in a labyrinth cavity between a planetary mechanism of a shearer rocker arm and a drum connecting sleeve, and comprises a cooling water channel which is arranged through a bearing seat and a gland of the planetary mechanism along a preset path, is used for guiding cooling water to the labyrinth cavity, and is used for cooling and dust removal of the floating sealing assembly by the cooling water; a water passage sleeve which is connected between the bearing seat and the gland and is used for guiding the cooling water channel; and a sealing assembly which is arranged between the water passage sleeve and the bearing seat and / or the gland and is used for sealing the cooling water.

[0007] Preferably, the cooling water channel comprises a main water channel which is arranged through the bearing seat and the gland, and a branch water channel which is arranged obliquely from the main water channel to the floating sealing assembly and is arranged through the gland, and the cooling water is guided to a sealing dynamic ring of the floating sealing assembly through the branch water channel, so as to cool and dust remove a dynamic ring labyrinth cavity.

[0008] Preferably, an outlet of the main water channel is located outside the labyrinth cavity, and the drum connecting sleeve is concave inwardly on a side wall corresponding to the outlet of the main water channel to form a first arc-shaped groove, and the cooling water is guided to a sealing static ring of the floating sealing assembly through the first arc-shaped groove, so as to cool and dust remove the sealing static ring and the inside of the labyrinth cavity.

[0009] Preferably, the side wall of the drum connecting sleeve is further provided with a second arc-shaped groove which is tangent to the first arc-shaped groove and is used for guiding the cooling water in the opposite direction, so as to dust remove the outside of the labyrinth cavity.

[0010] Preferably, the outlet direction of the main water channel is opposite to the drum rotating direction of the rocker arm, so as to enhance the cooling and dust removal effect.

[0011] Preferably, a first included angle is formed between the outlet direction of the main water channel and a horizontal line, a second included angle is formed between the outlet direction of the branch water channel and the horizontal line, and the first included angle is greater than the second included angle.

[0012] Preferably, the width of the main water channel is greater than the width of the branch water channel; and / or,

[0013] The position where the first arc-shaped groove and the second arc-shaped groove are tangent corresponds to the center position of the outlet of the main water channel.

[0014] Preferably, the sealing assembly comprises two O-shaped sealing rings which are respectively pressed in the bearing seat and the gland along the axial direction of the water passage sleeve.

[0015] The application further provides a coal mining machine comprising the coal mining machine rocker arm cooling and dust removal system according to any of the above solutions, which is used for cooling and dust removal of the floating sealing assembly in the labyrinth cavity between the planetary mechanism and the drum connecting sleeve of the coal mining machine rocker arm.

[0016] On the basis of common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily, thereby obtaining preferred examples of the application.

[0017] The positive progress effect of the application is that:

[0018] According to the coal mining machine rocker arm cooling and dust removal system and the coal mining machine, the cooling water is introduced into the labyrinth cavity by the cooling water channel arranged along the preset path in the bearing seat and the gland of the planetary mechanism, so that the floating sealing assembly is cooled and dusted by the cooling water; that is, by arranging the cooling and dust removal system at the last-stage transmission system of the rocker arm, the floating sealing assembly of the rocker arm can be cooled, and the dust removal purpose of the maximum rocker arm power is achieved, thereby improving the service life of the coal mining machine rocker arm. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the engagement of the rocker arm floating sealing system in the axial direction in the prior art.

[0020] Figure 2 is a partial view of the labyrinth cavity between the planetary mechanism and the drum connecting sleeve in the prior art.

[0021] Figure 3 is a structural schematic view of the coal mining machine rocker arm cooling and dust removal system in the embodiment of the application.

[0022] Figure 4 is a partial enlarged view of the coal mining machine rocker arm cooling and dust removal system in the embodiment of the application. DETAILED DESCRIPTION

[0023] The application will be further described below with reference to the embodiments shown in the drawings.

[0024] <EMBODIMENT>

[0025] As shown in Figure 3 , the embodiment discloses a coal mining machine rocker arm cooling and dust removal system 10, which is used for cooling and dust removal of the floating sealing assembly 50 in the labyrinth cavity 40 between the planetary mechanism 20 (only a part of the structure is shown in the figure) and the drum connecting sleeve 30 of the coal mining machine rocker arm. Specifically, the coal mining machine rocker arm cooling and dust removal system 10 comprises a cooling water channel 11, a water passage sleeve 12 and a sealing assembly.

[0026] The cooling water channel 11 is arranged along a preset path through the bearing seat 21 and the gland 22 of the planetary mechanism 20, and is used to guide the cooling water into the labyrinth chamber 40, so as to cool and dust the floating sealing assembly 50 by the cooling water.

[0027] The water jacket 12 is connected between the bearing seat 21 and the gland 22. Since the bearing seat 21 and the gland 22 are integrally assembled by bolts, there is a gap between them, which is easy to cause the cooling water to flow out. By adding the water jacket 12, the cooling water channel 11 can be guided between the bearing seat 21 and the gland 22.

[0028] The sealing assembly is arranged between the water jacket 12 and the bearing seat 21 and / or the gland 22, and is used to seal the cooling water and prevent the cooling water from leaking.

[0029] Based on the structure of the cooling water channel 11, the water jacket 12 and the sealing assembly 13, the cooling and dust removal system of the embodiment is arranged at the rocker arm final drive system, which can cool the rocker arm floating sealing assembly and maximize the dust removal purpose of the rocker arm power, thereby improving the service life of the rocker arm of the coal mining machine.

[0030] Here, it should be noted that, as shown in Figure 3 and Figure 4 , the floating sealing assembly 50 includes a floating sealing dynamic ring 51 and an o-ring 52, and a floating sealing static ring 53 and an o-ring 54. The floating sealing dynamic ring 51 and the o-ring 52 are installed on the gland 22, and the floating sealing static ring 53 and the o-ring 54 are installed on the drum connecting sleeve 30, thereby forming a rocker arm floating sealing system, which ideally realizes no oil leakage of the rocker arm in the rotating coal cutting condition. In addition, as shown in Figure 2 , the planetary mechanism 20 includes a planet carrier 23 and an end cover 24. The planet carrier 23 is a power output device of the rocker arm drive system, which is fixedly connected with the drum connecting sleeve 30 through a spline, and drives the drum to rotate, thereby cutting coal. The end cover 24 is fixedly connected with the planet carrier 23 through a screw 25, and is used to prevent the axial movement of the drum connecting sleeve 30.

[0031] In another embodiment, as shown in Figure 4 , the cooling water channel 11 includes a main water channel 111 and a branch water channel 112. Specifically, the main water channel 111 is arranged through the bearing seat 21 and the gland 22, and extends into the labyrinth as shown by the water flow direction of arrow B1 in Figure 4 . The branch water channel 112 is arranged through the gland 22 and extends from the outlet position of the main water channel 111 close to the gland 22 to the position of the floating sealing assembly 50. In this way, the cooling water is guided to the sealing dynamic ring 51 of the floating sealing assembly 50 through the branch water channel 112, as shown in Figure 4The water flow direction indicated by the middle arrow B2 cools and removes dust from the moving ring labyrinth cavity, restoring the activity space of the O-ring 52.

[0032] In other words, based on the structure of the cooling water channel 11, the cooling water enters through port A, passes through the bearing housing 21, the water jacket 12, and the pressure cap 22, and then flows out from inside the pressure cap 22 in the directions of arrows B1 and B2, thereby achieving dust removal and cooling of the rocker arm floating seal assembly.

[0033] In addition, in practical implementation, the water outlet direction of the main water channel 111 can be set to be opposite to the rotational speed direction of the rocker arm's drum, which can enhance the cooling and dust removal effect. Secondly, the water outlet direction of the main water channel 111 can be set to form a first angle with the horizontal line (e.g., Figure 3 As shown by angle α in the diagram, the water outlet direction of water distribution channel 112 forms a second included angle with the horizontal line (as shown by angle α in the diagram). Figure 3 (as shown by angle β in the diagram), and the first included angle is greater than the second included angle, and / or the width of the main water channel 111 is greater than the width of the branch water channel 112, which can ensure the cooling and dust removal effect.

[0034] In another embodiment, along the extending direction of the main water channel 111, the roller connecting sleeve 30 has a first arc-shaped groove 31 recessed inward on the side wall corresponding to the outlet of the main water channel 111. Cooling water is guided through the first arc-shaped groove 31 to the sealing stationary ring 53 of the floating sealing assembly 50. Figure 4 The water flow direction indicated by the middle arrow C2 is used to cool and remove dust, while also removing dust from the inside of the labyrinth cavity 40 and restoring the activity space of the O-ring 54.

[0035] In a preferred embodiment, the side wall of the roller connecting sleeve 30 is further provided with a second arc-shaped groove 32 tangent to the first arc-shaped groove 31, for guiding cooling water in the opposite direction, such as... Figure 4 The water flow direction indicated by the middle arrow C1 is used to remove dust from the outside of the labyrinth cavity 40. In specific implementation, the position where the first arc-shaped groove 31 and the second arc-shaped groove 32 are tangent can be set to correspond to the center position of the main water channel 111 outlet to achieve uniform distribution of cooling water and improve the dust removal effect of the labyrinth cavity.

[0036] In summary, by diverting the cooling water in the diversion channel 11 in different directions, multi-angle dust removal and cooling of the labyrinth cavity 40 and the floating seal assembly 50 are achieved, which effectively improves the cooling and dust removal effect, enhances the effectiveness of the floating seal, and prevents oil leakage from the rocker arm of the coal mining machine.

[0037] In another embodiment, to ensure the sealing of cooling water between the bearing housing 21 and the gland 22, the sealing assembly may be provided with at least two O-rings 13. For example... Figure 2As shown, two o-shaped sealing rings 13 are respectively arranged in the bearing seat 21 and the gland 22 along the axial direction of the water jacket 12, and the sealing of the cooling water is realized at both ends to prevent water leakage and improve the cooling and dust removal effect.

[0038] In addition, based on the above-mentioned embodiment, the embodiment also provides a coal mining machine, which comprises the coal mining machine rocker arm cooling and dust removal system described in the above-mentioned embodiment and is used for cooling and dust removal of the floating sealing assembly in the labyrinth cavity between the planetary mechanism of the coal mining machine rocker arm and the drum connecting sleeve.

[0039] The coal mining machine can realize both the floating sealing of the rocker arm and the dust removal of the maximum rocker arm power by applying the above-mentioned coal mining machine rocker arm cooling and dust removal system, thereby improving the service life of the coal mining machine rocker arm.

[0040] The protection scope of the present application is not limited to the above-mentioned embodiments, and obviously, those skilled in the art can make various modifications and changes to the present application without departing from the scope and spirit of the present application. If these modifications and changes belong to the scope of the claims of the present application and equivalent technologies, the intention of the present application also includes these modifications and changes.

Claims

1. A shearer arm cooling and dust removal system for cooling and dust removal of a floating seal assembly in a labyrinth cavity between a planetary mechanism and a drum connecting sleeve of a shearer arm, characterized in that, The system comprises: a cooling water channel, which is arranged along a preset path through the bearing seat and the gland of the planetary mechanism, and is used to guide cooling water to the labyrinth cavity to cool and dust the floating sealing assembly by the cooling water; a water jacket, which is connected between the bearing seat and the gland, and is used to guide the cooling water channel; a sealing assembly, which is arranged between the water jacket and the bearing seat and / or the gland, and is used to seal the cooling water.

2. The cooling and dusting system for the rocker arm of the coal mining machine according to claim 1, wherein: the cooling water channel comprises a main water channel, which penetrates through the bearing seat and the gland, and a branch water channel, which is arranged obliquely from the outlet position of the main water channel close to the gland to the floating sealing assembly and penetrates through the gland, and is used to guide the cooling water to the sealing dynamic ring of the floating sealing assembly to cool and dust the dynamic ring labyrinth cavity.

3. The cooling and dusting system for the rocker arm of the coal mining machine according to claim 2, wherein: the outlet of the main water channel is located on the outside of the labyrinth cavity, the first arc-shaped groove is concavely arranged on the side wall of the drum connecting sleeve corresponding to the outlet of the main water channel, and is used to guide the cooling water to the sealing static ring of the floating sealing assembly to cool and dust it and to dust the inside of the labyrinth cavity.

4. The cooling and dusting system for the rocker arm of the coal mining machine according to claim 3, wherein: the side wall of the drum connecting sleeve is further provided with the second arc-shaped groove, which is tangent to the first arc-shaped groove, and is used to guide the cooling water in the opposite direction to dust the outside of the labyrinth cavity.

5. The cooling and dusting system for the rocker arm of the coal mining machine according to claim 2, wherein: the outlet direction of the main water channel is opposite to the rotation direction of the drum of the rocker arm, so as to enhance the cooling and dusting effect.

6. The cooling and dusting system for the rocker arm of the coal mining machine according to claim 5, wherein: the first included angle between the outlet direction of the main water channel and the horizontal line is greater than the second included angle between the outlet direction of the branch water channel and the horizontal line.

7. The cooling and dusting system for the rocker arm of the coal mining machine according to claim 4, wherein: the width of the main water channel is greater than the width of the branch water channel; and / or, the position where the first arc-shaped groove and the second arc-shaped groove are tangent corresponds to the center position of the outlet of the main water channel.

8. The cooling and dusting system for the rocker arm of the coal mining machine according to claim 1, wherein: the sealing assembly comprises two O-shaped sealing rings, which are respectively arranged in the bearing seat and the gland in the axial direction of the water jacket.

9. A coal mining machine characterized by, The system comprises the cooling and dusting system for the rocker arm of the coal mining machine according to claims 1 to 8, which is used to cool and dust the floating sealing assembly in the labyrinth cavity between the planetary mechanism and the drum connecting sleeve of the rocker arm of the coal mining machine.

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