Dustproof full-sealing structure of cutting head of heading machine

Abstract

The utility model discloses a heading machine cutting head dustproof full-sealing structure which comprises a sealing end cover, the sealing end cover is connected with the tail portion of a cutting head body through a fastener, a first groove and a second groove are formed in the positions, facing an outer cylinder of a cutting arm, of the sealing end cover, and a first metal sealing ring and a second metal sealing ring are arranged in the first groove and the second groove. A first combined dustproof ring is arranged between the cutting head body and an outer cylinder of the cutting arm, the cutting head body is provided with a plurality of inspection covers, an annular oil storage groove is formed in the front end of the installation position of the first combined dustproof ring of the cutting head body, an oil hole is formed in the tail end of the annular oil storage groove, an oil cup is installed at the tail end of the oil hole, and an oil cup protection base is installed at the tail end of the oil cup. Dust is prevented from entering the cutting part in the working process of the heading machine to the maximum extent, and the service life of key parts of the cutting part is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mining machinery, in particular to a dust-proof full-sealed structure of a roadheader cutting head. Background Technique

[0002] The working conditions of a roadheader are harsh, and a large amount of dust will appear during the working process. As the cutting part directly involved in crushing coal and rock, it plays an important role in the overall performance of the machine. As an actuator, in the special underground environment, due to its frequent movement, it is very easy to be damaged by external dust. The cutting head rotates relative to the cutting arm, and external dust directly enters the cutting head cavity through the gap at the rear end of the cutting head. During operation, due to dust and the like entering the inner cavity of the cutting head, the service life of key components such as floating seals, bearings, and oil seals is shortened. Coupled with the restrictions of underground conditions, it is not easy to replace damaged parts, and only the components can be lifted out of the well for disassembly and repair. Therefore, in order to solve this problem, a dust-proof sealing structure needs to be added between the cutting head and the cutting arm. The commonly used dust-proof sealing structures at present are as Figure 1 , there is a relatively large radial gap between the cutting head body 6 and the outer cylinder 7 of the cutting arm, about 3mm on one side. Due to its relatively large radial gap, large-shaped gravel and dust are very easy to enter the internal cavity. Five asbestos packing rings 1, one O-ring 2, and two V-ring seals 3 are arranged axially between the cutting head body 6 and the outer cylinder 7 of the cutting arm. The asbestos packing ring 1 and the O-ring 2 are mainly arranged at the tail end of the cutting head body 6. Since the asbestos packing ring 1 and the O-ring 2 have poor wear resistance, during use, as gravel enters, their wear amount will increase extremely rapidly and they will soon fail; the V-ring 3 seal mainly relies on the lip to press tightly against the side of the cutting head body, and realizes the seal by relying on the axial compression amount of the V-ring. However, the cutting head body 6 and the outer cylinder 7 of the cutting arm are only connected by two high-strength bolts at the front. During operation, the bolts here are easy to loosen. When the connection between the two loosens, the V-ring seal will fail. Content of the Utility Model

[0003] The purpose of the utility model is to provide a dust-proof full-sealed structure of a roadheader cutting head, which can avoid dust from entering the inside of the cutting part during the working process of the roadheader to the greatest extent and extend the service life of the key components of the cutting part.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] The utility model discloses a dust-proof full-sealing structure for a cutting head of a roadheader, which comprises a sealing end cover. The sealing end cover is connected with the tail of the cutting head body through fasteners. A first groove and a second groove are arranged at the outer cylinder of the cutting arm facing the sealing end cover. A first metal sealing ring and a second metal sealing ring are arranged in the first groove and the second groove respectively. A first combined dust-proof ring is arranged between the cutting head body and the outer cylinder of the cutting arm. The cutting head body is provided with a plurality of inspection covers. An annular oil storage groove is formed at the front end of the cutting head body at the installation position of the first combined dust-proof ring. An oil hole is arranged at the end of the annular oil storage groove. An oil cup is installed at the end of the oil hole, and an oil cup protection seat is installed at the end of the oil cup.

[0006] Further, a second combined dust-proof ring is arranged at the connection part between the floating sealing seat and the floating sealing gland at the tail of the outer cylinder of the cutting arm.

[0007] Further, the sealing end cover is composed of two semi-circular rings.

[0008] Further, three first metal sealing rings are arranged in the first groove, and the first metal sealing rings on both sides hold the outer cylinder of the cutting arm tightly.

[0009] The middle first metal sealing ring is tightened and fits with the inner wall of the first groove of the sealing end cover.

[0010] Further, two second metal sealing rings are arranged in the second groove, and the two second metal sealing rings hold the outer cylinder of the cutting arm tightly.

[0011] Further, the second metal sealing ring is located between the first metal sealing ring and the first combined dust-proof ring.

[0012] The beneficial effects of the utility model are as follows:

[0013] The first metal sealing ring and the second metal sealing ring of the utility model are equivalent to rings with internal tension. Some of the first metal sealing rings do not rotate relative to the outer cylinder of the cutting arm, and the second metal sealing ring does not rotate relative to the outer cylinder of the cutting arm. The utility model uses the first metal sealing ring and the second metal sealing ring to achieve sealing, and at the same time uses the first combined dust-proof ring and the second combined dust-proof ring for subsequent sealing, so as to avoid dust from entering the inside of the cutting part during the working process of the roadheader to the greatest extent and extend the service life of the key parts of the cutting part. Description of the Drawings

[0014] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0015] Figure 1 It is a schematic diagram of the prior art.

[0016] Figure 2 It is a schematic diagram of the present utility model.

[0017] Figure 3 It is an exploded schematic diagram of the present utility model.

[0018] Figure 4 This is a partial schematic diagram of the present utility model.

[0019] Figure 5 This is a partial schematic diagram of the present utility model.

[0020] Figure 6 This is a partial schematic diagram of the present utility model. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0022] As shown in the figure, the present utility model discloses a fully sealed dust-proof structure for a roadheader cutting head, which includes a sealing end cover 4. The sealing end cover 4 is connected to the tail of the cutting head body 6 through a fastener 9. A groove one 41 and a groove two 42 are provided at the outer cylinder 7 of the cutting arm facing the sealing end cover 4. A metal sealing ring one 5 and a metal sealing ring two 8 are provided in the groove one 41 and the groove two 42. A combined dust-proof ring one 10 is provided between the cutting head body 6 and the outer cylinder 7 of the cutting arm. The cutting head body 6 is provided with a plurality of inspection covers 11. An annular oil storage groove 12 is opened at the front end of the cutting head body 6 at the installation position of the combined dust-proof ring one 10. An oil hole 13 is provided at the end of the annular oil storage groove 12. An oil cup 14 is installed at the end of the oil hole 13. An oil cup protection seat 15 is installed at the end of the oil cup 14. The oil cup 14 is a straight-through oil cup 14. The oil cup 14 provides oil for the combined dust-proof ring one 10 to achieve the sealing performance of replacement. The metal sealing ring two 8 will directly be stuck on the outer cylinder 7 of the cutting arm and will not rotate with the cutting head body 6, greatly improving the sealing performance.

[0023] In an embodiment of the present utility model, a combined dust-proof ring two 18 is provided at the connection between the floating seal seat 16 at the tail of the outer cylinder 7 of the cutting arm and the floating seal gland 17. The connection between the floating seal seat 16 and the floating seal gland 17 is set to be a plurality of stepped types, and the combined dust-proof ring two 18 prevents dust from entering the gear oil cavity.

[0024] In an embodiment of the present utility model, the sealing end cover 4 is composed of two semi-circular rings 43. During installation, first, the first metal sealing ring 5 and the second metal sealing ring 8 are sleeved on the outer cylinder 7 of the cutting arm, then the two semi-circular rings 43 are aligned and installed with the first metal sealing ring 5 and the second metal sealing ring 8, and then the combination of the two semi-circular rings 43 and the first metal sealing ring 5 and the second metal sealing ring 8 is pushed into the cutting head body 6, and finally, they are connected using the fastener 9.

[0025] In an embodiment of the present utility model, three first metal sealing rings 5 are provided in the first groove 41, and the first metal sealing rings 5 on both sides tightly hold the outer cylinder 7 of the cutting arm;

[0026] The middle first metal sealing ring 5 is tensioned and fits against the inner wall of the first groove 41 of the sealing end cover. One middle first metal sealing ring 5 rotates with the cutting head body 6, the first metal sealing rings 5 on both sides are attached to the outer cylinder 7 of the cutting arm without moving, and the middle first metal sealing ring 5 rotates relative to the first metal sealing rings 5 on both sides. The planes of adjacent first metal sealing rings 5 rub against each other, and the plane of the first metal sealing ring 5 rubs against the side surface of the groove. After running for a period of time, the first metal sealing ring 5 in contact with the side surface of the groove will separate from the side surface of the groove and no longer rub; for the plane friction between the first metal sealing rings 5, since the contact area of the first metal sealing rings 5 is small, the frictional force is small, and the heat generation and wear caused thereby are not large.

[0027] In an embodiment of the present utility model, two second metal sealing rings 8 are provided in the second groove 42, and the two second metal sealing rings 8 tightly hold the outer cylinder 7 of the cutting arm.

[0028] The radial diameter clearance between the sealed end cover 4 and the outer cylinder 7 of the cutting arm is 1.2 mm, and the unilateral clearance is 0.6 mm. Dust and hard gravel with an outer dimension ≥ 0.6 mm can be intercepted here. The width of the first groove 41 is 9.8 mm, and the thickness of each first metal sealing ring 5 is 3 mm. When 3 first metal sealing rings 5 are pressed tightly under extreme conditions, the axial clearance is 0.8 mm. The radial clearance between the outer diameter of the first metal sealing rings 5 on both sides and the first groove 41 is 1 mm. Radially, for hard gravel with a size ≤ 0.6 mm, the first metal sealing ring 5 will not be welded to the sealed end cover 4. Regarding the discrete distribution of fine dust, after passing through 3 first metal sealing rings 5, a small amount enters the second groove 42. There are 2 second metal sealing rings 8 provided at the second groove 42, and the 2 second metal sealing rings 8 hold the outer cylinder 7 of the cutting arm tightly. The radial diameter clearance between the sealed end cover 4 and the outer cylinder 7 of the cutting arm is 0.8 mm, and the unilateral clearance is 0.4 mm. Dust and hard gravel with an outer dimension ≥ 0.4 mm can be intercepted here. The width of the second groove 42 is 6.6 mm, and the thickness of each second metal sealing ring 8 is 3 mm. When 2 second metal sealing rings 8 are pressed tightly under extreme conditions, the axial clearance is 0.6 mm. The radial clearance between the outer diameter of the second metal sealing rings and the groove is 1 mm. Radially, for hard gravel with a size ≤ 0.4 mm, the second metal sealing ring 8 will not be welded to the sealed end cover. Regarding the discrete distribution of fine dust, after passing through the second metal sealing ring 8, an extremely small amount enters the next place. The combined dust-proof ring 10 is used for sealing later.

[0029] In an embodiment of the present invention, the second metal sealing ring 8 is located between the first metal sealing ring 5 and the combined dust-proof ring 10. The combined dust-proof ring 10 needs to be coated with lithium-based grease first.

[0030] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dust-proof fully sealed structure for the cutting head of a roadheader, characterized in that, It includes a sealed end cover which is connected to the tail of the cutting head body by fasteners. There are groove one and groove two on the sealed end cover facing the outer cylinder of the cutting arm. A metal sealing ring one and a metal sealing ring two are arranged in groove one and groove two. A combined dust-proof ring one is arranged between the cutting head body and the outer cylinder of the cutting arm. The cutting head body is provided with several inspection covers. The cutting head body is provided with an annular oil storage groove at the front end of the installation position of the combined dust-proof ring one. An oil hole is arranged at the end of the annular oil storage groove. An oil cup is installed at the end of the oil hole. An oil cup protection seat is installed at the end of the oil cup.

2. The dust-proof fully-sealed structure of a roadheader cutting head according to claim 1, characterized in that, A combined dust-proof ring two is arranged at the connection between the floating seal seat at the tail of the outer cylinder of the cutting arm and the floating seal gland.

3. The dust-proof fully sealed structure of the cutting head of a roadheader according to claim 1, characterized in that, The sealed end cover is composed of two semi-circular rings.

4. The dust-proof fully-sealed structure of a roadheader cutting head according to claim 1, characterized in that, There are three metal sealing rings one in groove one. The metal sealing rings one on both sides hold the outer cylinder of the cutting arm tightly. The middle metal sealing ring one expands and fits with the inner wall of groove one of the sealed end cover.

5. The dust-proof fully-sealed structure of a roadheader cutting head according to claim 1, characterized in that There are two metal sealing rings two in groove two. The two metal sealing rings two hold the outer cylinder of the cutting arm tightly.

6. The dust-proof fully sealed structure of a roadheader cutting head according to claim 1, characterized in that, The metal sealing ring two is located between the metal sealing ring one and the combined dust-proof ring one.

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