Heading machine main drive sealing spacer ring and heading machine main drive sealing structure

Abstract

The utility model relates to a heading machine main drive sealing spacer ring and a heading machine main drive sealing structure, the heading machine main drive sealing spacer ring comprises a spacer ring body, the outer wall of the spacer ring body is embedded with a telescopic limiting block which can stretch along the radial direction of the spacer ring body; elastic connecting pieces which can push the telescopic limiting blocks to move outwards and protrude out of the outer wall of the spacer ring body are arranged on the inner sides, in the radial direction of the spacer ring body, of the telescopic limiting blocks, and adjusting driving parts which can push the telescopic limiting blocks to move inwards and retract into the spacer ring body abut against the outer sides, in the radial direction of the spacer ring body, of the telescopic limiting blocks. The heading machine main drive sealing spacer ring solves the problems of posture changes such as axial movement and deviation of main drive sealing in the prior art, the risk of sealing failure is reduced through the heading machine main drive sealing spacer ring capable of being axially and mechanically locked, and the reliability of a main drive sealing system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of main drive of heading machine, especially to a main drive sealing spacer ring of heading machine and main drive sealing structure of heading machine. BACKGROUND

[0002] The main drive sealing technology plays an important role in underground engineering construction. As the "immune system" of the shield machine, the main drive sealing plays an important role in blocking external media and is a key factor to ensure the safe operation of the equipment.

[0003] The main drive sealing system adopts the principle of multi-seal combination. The existing sealing installation form is a way of alternating installation of one spacer ring and one seal. The structure form is shown in Figure 4 A plurality of lip-shaped rubber seals 3 and conventional sealing spacers 4 are staggered between the grease ring 1 and the sealing runway 5. The end of the grease ring 1 is connected to the sealing compression ring 2 through the first bolt 9. The sealing compression ring 2 axially compresses each lip-shaped rubber seal 3 and conventional sealing spacer 4. The outermost sealing plate is compressed by the bolt. Due to the large number of sealing strips and the deep installation depth, it is impossible to ensure that each seal is evenly compressed and fitted during the installation process, causing the seal to "axially move" and "run off" during operation, as shown in Figure 5 The main drive sealing relies on the close fit of the sealing lip and the structure member matched therewith to achieve oil sealing. When the spacer ring cannot be tightly compressed, the posture of the seal will change, causing the seal to not fit tightly with the structure member, and even causing the seal to overturn, resulting in failure of the sealing system, and in severe cases, damage to the main bearing and even causing the equipment to stop.

[0004] Chinese patent CN214534483U discloses a novel main drive sealing spacer ring, which is hard connected by bolts to ensure that the spacer rings are compressed against each other. This way of compression prevents the seal from running off during operation. However, this method has the disadvantages of increased use of bolts, increased installation difficulty, and simultaneous increase in sealing installation difficulty.

[0005] Therefore, based on years of experience and practice in the relevant industry, the present inventors propose a main drive sealing spacer ring of heading machine and main drive sealing structure of heading machine to overcome the defects of the prior art. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims to provide a main drive sealing spacer ring of heading machine and main drive sealing structure of heading machine to solve the problem of posture change of the main drive sealing "axial movement" and "run off" in the prior art. The main drive sealing spacer ring of heading machine can be axially mechanically locked to reduce the risk of seal failure and improve the reliability of the main drive sealing system.

[0007] The utility model discloses a kind of main drive sealing isolation rings of heading machine, including isolation ring body, the outer wall of the isolation ring body is embedded and can be expanded and contracted along the radial expansion and contraction limiting block of the isolation ring body, the radial inner side of the isolation ring body is arranged with the elastic connecting piece that can push the expansion and contraction limiting block outward and protrude from the outer wall of the isolation ring body, the radial outer side of the isolation ring body is abutted with the adjustment driving portion that can push the expansion and contraction limiting block inward and shrink in the isolation ring body.

[0008] In a preferred embodiment of the utility model, the adjustment driving portion includes an adjustment pin arranged along the radial direction of the isolation ring body, a first end of the adjustment pin abuts against the radial outer end of the expansion and contraction limiting block, a second end of the adjustment pin abuts against an adjustment screw, and the adjustment screw is arranged along the axial direction of the isolation ring body; the adjustment screw can rotate and move axially to abut against and push the adjustment pin and the expansion and contraction limiting block to move to the radial inner side of the isolation ring body.

[0009] In a preferred embodiment of the utility model, a first magnetic slope is arranged at one end of the adjustment screw close to the adjustment pin, a second magnetic slope is arranged at the second end of the adjustment pin, and the first magnetic slope and the second magnetic slope can abut against and attract each other.

[0010] In a preferred embodiment of the utility model, an inwardly recessed accommodation groove is arranged on the outer wall of the isolation ring body, and the expansion and contraction limiting block is arranged in the accommodation groove in an expandable and contractible manner.

[0011] In a preferred embodiment of the utility model, a connecting pressing plate is embedded at the opening of the accommodation groove, a limiting through hole is arranged on the pressing plate, and the expansion and contraction limiting block can slide through the limiting through hole.

[0012] In a preferred embodiment of the utility model, the expansion and contraction limiting block includes a limiting column that can slide through the limiting through hole and a limiting seat that can abut against the pressing plate.

[0013] In a preferred embodiment of the utility model, a clamping groove is arranged on the end face of one end of the limiting column away from the limiting seat, a bolt protruding column is arranged at the first end of the adjustment pin, the bolt protruding column can be inserted into the clamping groove, and the end face of the bolt protruding column abuts against and contacts the groove bottom face of the clamping groove.

[0014] In a preferred embodiment of the utility model, the elastic connecting piece includes at least one spring, and the two ends of the spring abut against the accommodation groove and the expansion and contraction limiting block, respectively.

[0015] The utility model discloses a kind of tunneling machine main drive sealing structures, including grease ring and sealing runway, and at least one aforementioned tunneling machine main drive sealing spacer ring between grease ring and sealing runway is set.

[0016] In a preferred embodiment of the utility model, the first hole path is provided on the side wall of the grease ring, and the inner wall of the first hole path is provided with internal threads, and the adjusting screw is threadedly connected in the first hole path; the second hole path is provided on the side wall of the grease ring and communicates with the first hole path, and the adjusting pin is slidably arranged in the second hole path; the first spacing is provided between the radial outer end of the second hole path and the axial inner end of the first hole path.

[0017] As described above, the tunneling machine main drive sealing spacer ring and the tunneling machine main drive sealing structure have the following beneficial effects:

[0018] In the tunneling machine main drive sealing spacer ring, the telescopic limiting block can be radially telescoped along the spacer body, and the telescopic limiting block protrudes from the outer wall of the spacer body when it moves outward, thereby achieving axial clamping positioning of the spacer body and ensuring the axial position of the sealing spacer ring, i.e., mechanically locking the sealing spacer ring; by adjusting the driving part, the telescopic limiting block is retracted into the spacer body, the sealing spacer ring is unlocked, and the sealing spacer ring can be axially pulled out for disassembly. The tunneling machine main drive sealing spacer ring has an adjusting self-locking function, which solves the problems of axial movement, deviation, and attitude change of the sealing.

[0019] The tunneling machine main drive sealing structure can solve the problems of axial movement, deviation, and attitude change of the sealing caused by insufficient axial compression, reduce the risk of sealing failure, and improve the reliability of the main drive sealing system. BRIEF DESCRIPTION OF DRAWINGS

[0020] The following drawings are only intended to illustrate and explain the utility model and do not limit the scope of the utility model. Among them:

[0021] Figure 1 It is a schematic view of the tunneling machine main drive sealing spacer ring and the tunneling machine main drive sealing structure of the utility model.

[0022] Figure 2 It is a schematic view of the adjusting driving part when the telescopic limiting block moves outward to lock.

[0023] Figure 3 It is a schematic view of the adjusting driving part when the telescopic limiting block moves inward to unlock.

[0024] Figure 4 It is the existing main drive sealing installation structure.

[0025] Figure 5 This is a schematic diagram of an existing main drive seal mounting structure experiencing axial movement.

[0026] In the picture:

[0027] 1. Grease ring; 101. First orifice; 102. Second orifice;

[0028] 2. Sealing pressure ring;

[0029] 3. Lip seal;

[0030] 4. Standard sealing spacer ring;

[0031] 5. Sealed runway;

[0032] 6. Spacer ring body; 601. Elastic connector; 602. Telescopic limit block; 603. Pressure plate;

[0033] 7. Adjusting screw;

[0034] 8. Adjusting pin;

[0035] 9. First bolt;

[0036] 10. Second bolt. Detailed Implementation

[0037] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0038] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the present invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on this invention, and these should all be considered within the scope of this invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal connections between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] As shown in Figure 1 , Figure 2 , Figure 3 The utility model provides a kind of main drive sealing spacer ring of heading machine, including spacer ring body 6, the outer wall of spacer ring body 6 is embedded and can be expanded and contracted along the radial direction of spacer ring body 6 expansion limiting block 602, expansion limiting block 602 is set to the radial direction of spacer ring body 6 and the elastic connecting piece 601 that can push expansion limiting block 602 to move outward and protrude from the outer wall of spacer ring body 6 is arranged on the inner side, expansion limiting block 602 is abutted on the radial direction of spacer ring body 6 and the adjusting drive portion that can push expansion limiting block 602 to move inward and retract in spacer ring body 6 is arranged on the outer side.

[0041] In the main drive sealing spacer ring of heading machine of the utility model, expansion limiting block can be expanded and contracted along the radial direction of spacer ring body 6, and expansion limiting block protrudes from the outer wall of spacer ring body 6 when moving outward, so that the axial clamping positioning of spacer ring body 6 is realized, the axial position of the sealing spacer ring is ensured, i.e., the mechanical locking sealing spacer ring is realized; the expansion limiting block is retracted in spacer ring body 6 by adjusting drive portion, the sealing spacer ring is unlocked, and the axial pulling out of the sealing spacer ring can realize disassembly. The main drive sealing spacer ring of heading machine of the utility model has the adjusting self-locking function, and the attitude change problems such as sealing "axial movement" and "runout" are solved.

[0042] Further, the expansion mechanism composed of expansion limiting block 602, elastic connecting piece 601 and adjusting drive portion is provided with at least one group, and in the embodiment, four groups of expansion mechanisms are evenly distributed along one circumference of spacer ring body 6, so that locking and sealing are stably realized.

[0043] Further, as shown in Figure 2 , Figure 3 Adjusting drive portion includes adjusting pin 8 arranged along the radial direction of spacer ring body 6, the first end of adjusting pin 8 is abutted on the radial outer end of expansion limiting block 602, the second end of adjusting pin 8 is abutbed and arranged adjusting screw 7, and adjusting screw 7 is arranged along the axial direction of spacer ring body 6; adjusting screw 7 can rotate and move axially to push adjusting pin 8 and expansion limiting block 602 to move to the radial inner side of spacer ring body 6.

[0044] Further, as shown in Figure 2 The first magnetic inclined surface is arranged at one end of adjusting screw 7 close to adjusting pin 8, the second magnetic inclined surface is arranged at the second end of adjusting pin 8, and the first magnetic inclined surface and the second magnetic inclined surface can be abutted and adsorbed.

[0045] In an embodiment, the first magnetic slope has a negative polarity and the second magnetic slope has a positive polarity, and the adjusting screw 7 and the adjusting pin 8 are attracted together by magnetic force.

[0046] The adjusting screw 7 is not limited to the magnetic force mode for controlling the adjusting pin 8, and can be other modes capable of abutting contact and capable of applying a pushing force.

[0047] Further, as shown in Figure 2 , the outer wall of the spacer ring body 6 is provided with an inwardly recessed accommodating groove, and the telescopic limiting block 602 is telescopically arranged in the accommodating groove.

[0048] Further, as shown in Figure 2 , a connecting pressing plate 603 is embedded at the opening of the accommodating groove, and the telescopic limiting block 602 can slide through the limiting through hole provided on the pressing plate 603.

[0049] In an embodiment, as shown in Figure 2 , a counterbore groove is provided at the opening of the accommodating groove, and the pressing plate 603 is connected to the counterbore groove of the spacer ring body 6 by the second bolt 10, for limiting the telescopic limiting block 602.

[0050] Further, the telescopic limiting block 602 includes a limiting column capable of sliding through the limiting through hole and a limiting seat capable of abutting on the pressing plate 603.

[0051] Further, the end face of the end of the limiting column away from the limiting seat is provided with a locking groove, and the first end of the adjusting pin 8 is provided with a plug convex column capable of being inserted into the locking groove, and the end face of the plug convex column is in abutting contact with the groove bottom face of the locking groove.

[0052] Further, as shown in Figure 2 , the elastic connecting piece 601 includes at least one spring, and the two ends of the spring are respectively in abutting contact with the accommodating groove and the telescopic limiting block 602.

[0053] As shown in Figure 2 , under normal conditions, the telescopic limiting block 602 is extended under the elastic force of the elastic connecting piece 601, and the height is greater than the outer circular face of the spacer ring body 6, that is, it protrudes from the outer wall of the spacer ring body 6, so as to be clamped on the inner wall of the sealed member outside, for example, the grease ring 1.

[0054] In an embodiment, the number of springs is 2, and the springs are symmetrically arranged on the radially inner side of the telescopic limiting block 602.

[0055] As shown in Figure 1 , the utility model also provides a kind of main drive sealing structure of heading machine, including grease ring 1 (when heading state, keep not rotating) and sealing runway 5, and at least one main drive sealing spacer ring of heading machine is arranged between grease ring 1 and sealing runway 5.

[0056] Further, as shown in Figure 1 、 Figure 2 , the side wall of the oil ring 1 is provided with a first hole path 101 parallel to the axial direction, the inner wall of the first hole path 101 is provided with an internal thread, and the adjusting screw 7 is threadedly connected to the first hole path 101; the side wall of the oil ring 1 is provided with a second hole path 102 along the radial direction and communicated with the first hole path 101, and the adjusting pin 8 is slidably arranged in the second hole path 102; the radial outer end of the second hole path 102 and the axial inner end of the first hole path 101 are arranged at a first spacing.

[0057] When the tunneling machine works using the conventional tunneling machine main drive seal, the sealing compression ring 2, the lip-shaped rubber seal 3, the conventional sealing spacer ring 4, the lip-shaped rubber seal 3, and the like are sequentially installed, the sealing compression ring 2 and the oil ring 1 are connected together through the first bolt 9, and the function of compressing the entire sealing group is achieved. In actual work, the outermost seal directly contacts the sealing compression ring 2, and the closer to the drive box side, the smaller the sealing force, that is, the axial compression amount of each sealing is inconsistent, and the inside seal is not compressed tightly, and if the seal is not compressed tightly, the seal may be eccentrically worn and moved, and the like, and a schematic diagram is shown in the accompanying Figure 4 、 Figure 5 .

[0058] The tunneling machine main drive sealing spacer ring of the utility model can be installed in front of any sealing except the first sealing for axial compression of the sealing, because the compression amount of each sealing is certain, according to the theoretical calculation of the axial length, that is, the position of each spacer ring is fixed, as long as the position of the sealing spacer ring is fixed, the sealing can be ensured to be in a compressed state at all times, and the sealing failure phenomenon caused by the change of the installation form is avoided. When the tunneling machine main drive sealing spacer ring in the utility model is installed to the specified position, mechanical locking is generated between the tunneling machine main drive sealing spacer ring and the oil ring 1, the axial movement of the tunneling machine main drive sealing spacer ring is avoided, and at this time, the axial compression amount of the sealing is at a normal compression level, and the problem of insufficient axial compression does not exist.

[0059] Before the tunneling machine main drive sealing spacer ring of the utility model is installed, the adjusting screw 7 and the adjusting pin 8 are installed in the oil ring 1, and the inclined surfaces (the first magnetic inclined surface and the second magnetic inclined surface) of the adjacent ends of the adjusting screw 7 and the adjusting pin 8 are adsorbed together through the magnetic force. After the spacer ring body 6 is installed to the specified position of the sealing cavity between the oil ring 1 and the sealing track 5, as shown in Figure 2 , the telescopic limiting block 602 is clamped in the second hole path 102 of the oil ring 1 under the elastic force of the elastic connecting piece 601, mechanical locking is achieved, and at this time, the spacer ring body 6 cannot be axially moved. At this time, the sealing is in a compressed state, and the axial movement of the sealing is avoided, and the sealing failure problem caused by the insufficient compression of the sealing in the axial direction is solved.

[0060] When disassembly is needed, the adjusting screw 7 is screwed to move axially, which promotes the adjusting pin 8 to move to the radial inner side (downwards in the figure), as shown in the figure, the adjusting pin 8 will press the telescopic limiting block 602 into the accommodating groove of the spacer body 6, at this time, the spacer body 6 can be smoothly pulled out. Figure 1 、 Figure 4 The telescopic limiting block can protrude from the outer wall of the spacer body when moving outward, thereby achieving the axial clamping positioning of the spacer body and ensuring the axial position of the sealing spacer to be fixed, i.e., the mechanical locking of the sealing spacer. Figure 4 The telescopic limiting block can be moved inward and retracted into the spacer body by adjusting the driving part, the sealing spacer is unlocked, and the axial pulling-out of the sealing spacer can achieve disassembly.

[0061] The tunneling machine main drive sealing structure of the utility model, through the tunneling machine main drive sealing spacer that can axial mechanical locking, can solve the problem of axial run, eccentric wear, attitude change and the like caused by insufficient axial compression of sealing, reduce the risk of sealing failure, improve the reliability of the main drive sealing system.

[0062] The tunneling machine main drive sealing spacer and the tunneling machine main drive sealing structure of the utility model have the following beneficial effects:

[0063] The telescopic limiting block can protrude from the outer wall of the spacer body when moving outward, thereby achieving the axial clamping positioning of the spacer body and ensuring the axial position of the sealing spacer to be fixed, i.e., the mechanical locking of the sealing spacer.

[0064] The tunneling machine main drive sealing structure of the utility model, through the tunneling machine main drive sealing spacer that can axial mechanical locking, can solve the problem of axial run, eccentric wear, attitude change and the like caused by insufficient axial compression of sealing, reduce the risk of sealing failure, improve the reliability of the main drive sealing system.

[0065] The above description is only a specific embodiment of the utility model, and is not used to limit the scope of the utility model. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principles of the utility model shall fall within the scope of protection of the utility model.

Claims

1. A main drive seal spacer ring for a roadheader, characterized in that, The spacer ring body (6) is provided with an elastic connecting piece (601) and a telescopic limiting block (602). The telescopic limiting block (602) is arranged on the outer wall of the spacer ring body (6) and can be extended and retracted along the radial direction of the spacer ring body (6). The elastic connecting piece (601) is arranged on the inner side of the spacer ring body (6) in the radial direction and can push the telescopic limiting block (602) to move outward and protrude from the outer wall of the spacer ring body (6). The telescopic limiting block (602) is arranged on the outer side of the spacer ring body in the radial direction and abuts against an adjusting driving part which can push the telescopic limiting block (602) to move inward and retract into the spacer ring body (6).

2. The main drive seal spacer ring for a boring machine of claim 1, wherein, The adjusting driving part comprises an adjusting pin (8) arranged in the radial direction of the spacer ring body (6). The first end of the adjusting pin (8) abuts against the radial outer end of the telescopic limiting block (602), and the second end of the adjusting pin (8) abuts against an adjusting screw (7) arranged in the axial direction of the spacer ring body (6). The adjusting screw (7) can rotate and move axially to push the adjusting pin (8) and the telescopic limiting block (602) to move to the inner side of the spacer ring body (6) in the radial direction.

3. The main drive seal spacer ring for a boring machine of claim 2, wherein, The end of the adjusting screw (7) close to the adjusting pin (8) is provided with a first magnetic inclined surface, and the second end of the adjusting pin (8) is provided with a second magnetic inclined surface. The first magnetic inclined surface and the second magnetic inclined surface can abut against and attract each other.

4. The main drive seal spacer ring for a boring machine of claim 2, wherein, The outer wall of the spacer ring body (6) is provided with an inwardly recessed accommodating groove, and the telescopic limiting block (602) is arranged in the accommodating groove in a telescopic manner.

5. The main drive seal spacer ring for a boring machine of claim 4, wherein, A connecting pressing plate (603) is arranged at the opening of the accommodating groove. The pressing plate (603) is provided with a limiting through hole, and the telescopic limiting block (602) can slide through the limiting through hole.

6. The main drive seal spacer ring for a boring machine of claim 5, wherein, The telescopic limiting block (602) comprises a limiting column which can slide through the limiting through hole and a limiting seat which can abut against the pressing plate (603).

7. The main drive seal spacer ring for a boring machine of claim 6, wherein, The end face of the end of the limiting column away from the limiting seat is provided with a locking groove, the first end of the adjusting pin (8) is provided with a plug-in convex column, the plug-in convex column can be inserted into the locking groove, and the end face of the plug-in convex column abuts against and contacts the groove bottom face of the locking groove.

8. The main drive seal spacer ring for a boring machine of claim 4, wherein, The elastic connecting piece (601) comprises at least one spring, and the two ends of the spring abut against the accommodating groove and the telescopic limiting block (602), respectively.

9. A main drive sealing structure of a heading machine, characterized by The oil ring (1) and the sealing runway (5) are provided with at least one tunneling machine main drive sealing spacer ring as claimed in any one of claims 2-8.

10. The main drive seal structure of the heading machine according to claim 9, characterized in that, The side wall of the oil ring (1) is provided with a first hole path (101) arranged in parallel to the axial direction, the inner wall of the first hole path (101) is provided with an internal thread, and the adjusting screw (7) is threadedly connected to the first hole path (101); the side wall of the oil ring (1) is provided with a second hole path (102) arranged in the radial direction and communicated with the first hole path (101), and the adjusting pin (8) is slidably arranged in the second hole path (102); and the radial outer end of the second hole path (102) and the axial inner end of the first hole path (101) are arranged with a first interval.

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