Three-way compensation type trolley sealing device

Abstract

The application discloses a three-way compensation type trolley sealing device and belongs to the technical field of mechanical equipment. The three-way compensation type trolley sealing device comprises a sealing friction plate, a sealing cover plate (2), a first elastic member (17) and a second elastic member (18). The sealing friction plate comprises a first sealing friction plate (1) and a second sealing friction plate (7). A moving pair is formed between the first sealing friction plate (1) and the second sealing friction plate (7), so that the axial farthest distance of the first sealing friction plate (1) and the second sealing friction plate (7) is equal to the axial length of the sealing cover plate (2). The first elastic member (17) is arranged between the sealing cover plate (2) and the first sealing friction plate (1) and the second sealing friction plate (7). The second elastic member (18) is arranged between the first sealing friction plate (1) and the second sealing friction plate (7). The three-way compensation type trolley sealing device can improve the sealing effect when used for trolley sealing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical equipment, in particular to a three-way compensation type trolley sealing device. BACKGROUND

[0002] The step type (flat burning) / belt type sintering machine is a closed electric arc furnace sintering belt composed of many trolleys, so the trolley is an important component of the sintering machine. It directly bears the charging, ignition, air extraction, sintering until the machine tail unloading, and completes the sintering operation. The effective sintering area of the sintering machine is the product of the width of the trolley and the effective length of the sintering machine. The trolley is composed of a trolley frame, a baffle, a roller, a grate and a movable slide. The service life of the trolley mainly depends on the service life of the trolley frame. According to the analysis, the damage of the trolley is mainly due to the thermal cycle change and the cracks and deformation caused by the contact with the burning matter. In the prior art, the sealing effect of the trolley is poor, and therefore needs to be improved. SUMMARY

[0003] Therefore, the present application provides a three-way compensation type trolley sealing device, which can compensate the trolley sealing in the vertical and horizontal directions, can improve the sealing effect when used for trolley sealing, and is more suitable for practical use.

[0004] In order to achieve the first purpose, the technical scheme of the three-way compensation type trolley sealing device provided by the present application is as follows:

[0005] The present application provides a three-way compensation type trolley sealing device, which comprises a sealing friction plate, a sealing cover plate (2), a first elastic member (17) and a second elastic member (18),

[0006] The sealing friction plate comprises the first sealing friction plate (1) and the second sealing friction plate (7), and a moving pair is formed between the first sealing friction plate (1) and the second sealing friction plate (7), so that the axial farthest distance of the first sealing friction plate (1) and the second sealing friction plate (7) is equal to the axial length of the sealing cover plate (2);

[0007] The first elastic member (17) is arranged between the sealing cover plate (2) and the first sealing friction plate (1) and the second sealing friction plate (7);

[0008] The second elastic member (18) is arranged between the first sealing friction plate (1) and the second sealing friction plate (7).

[0009] The three-way compensation type trolley sealing device provided by the present application can further be realized by the following technical measures.

[0010] As a preferred, the three-way compensation type trolley sealing device further comprises a limiting pin (9),

[0011] The first sealing friction plate (1) is provided with a socket (21) for connecting with the connecting end of the second sealing friction plate (7),

[0012] The second sealing friction plate (2) is provided with an insertion piece for connecting with the connecting end of the first sealing friction plate (1),

[0013] The limiting pin (9) is fixedly connected to the socket (21),

[0014] The insertion piece is provided with a limiting hole (8),

[0015] The movement pair formed between the first sealing friction plate (1) and the second sealing friction plate (7) is limited by the cooperation between the limiting pin (9) and the limiting hole (8).

[0016] Preferably,

[0017] A limiting boss (22) is formed between the first sealing friction plate (1) and the socket (21),

[0018] When the limiting pin (9) is in the right limit position of the limiting hole (8), the spacing between the rightmost end of the insertion piece and the limiting boss (22) is equal to the maximum stroke of the limiting pin (8).

[0019] Preferably, the limiting pin (9) is a cylindrical pin, and the limiting hole (8) is an oblong hole, and the diameter of the cylindrical pin is equal to the diameter of the oblong hole.

[0020] Preferably, the three-way compensation type trolley sealing device further comprises a first limiting groove (11) and a second limiting groove (10),

[0021] The first limiting groove (11) is fixedly connected to the first sealing friction plate (1) and forms a first accommodating space inside it

[0022] The second limiting groove (10) is fixedly connected to the second sealing friction plate (7) and forms a second accommodating space inside it.

[0023] The radial cross-sectional shape of the second elastic member (18) is the same as the radial cross-sectional shape of the first accommodating space and the second accommodating space.

[0024] Preferably, the three-way compensation type trolley sealing device further comprises a guide column (20),

[0025] The guide column (20) is fixedly connected to any one of the corresponding surfaces of the first sealing friction plate (1), the second sealing friction plate (7) and the sealing cover plate (2); and a third limiting groove (12) is arranged at a position corresponding to the guide column (20) on the other of the first sealing friction plate (1), the second sealing friction plate (7) and the sealing cover plate (2).

[0026] One end of the first elastic member (17) is sleeved on the guide column (20), and the other end of the first elastic member (17) is embedded in the third limiting groove (12).

[0027] Preferably, the first elastic member (17) and / or the second elastic member (18) is a cylindrical spring.

[0028] Preferably, the three-way compensation type trolley sealing device further comprises a first sealing member (19) and a second sealing member (29),

[0029] The first sealing member (19) is fixedly connected to any one of the corresponding surfaces of the first sealing friction plate (1), the second sealing friction plate (7) and the sealing cover plate (2) along the axial direction; and the second sealing member (29) is fixedly connected to a position corresponding to the first sealing member (19) on the other of the corresponding surfaces of the first sealing friction plate (1), the second sealing friction plate (7) and the sealing cover plate (2).

[0030] The second sealing member (29) is provided with a gap at a position corresponding to the first sealing member (19), so that the first sealing member (19) and the gap can be gap-fitted, the first sealing member (19) can freely enter and exit the gap in the vertical direction, and when the first sealing member (19) is in the gap, the first sealing member (19), the second sealing member (29), the side walls of the first sealing friction plate (1) and the second sealing friction plate (7), and the side walls of the sealing cover plate (2) together form a labyrinth seal along the axial direction.

[0031] Preferably, the second sealing member (29) is provided with a first wing (31) and a second wing (32) at one end for cooperating with the first sealing member (19),

[0032] The distance between the first wing (31) and the second wing (32) decreases from top to bottom, forming the gap.

[0033] Preferably, the bottom surfaces of the first sealing friction plate (1) and the second sealing friction plate (7) are provided with a plurality of blind holes (6), and graphite columns are embedded in the blind holes (6).

[0034] The three-way compensation trolley sealing device provided by this invention uses a first elastic element 17 disposed between the sealing cover plate 2 and the first sealing friction plate 1 and the second sealing friction plate 7 to compensate for the gap between the sealing cover plate 2 and the first sealing friction plate 1 and the second sealing friction plate 7 in both the upper and lower directions. By dividing the sealing friction plates into the first sealing friction plate 1 and the second sealing friction plate 7, and placing a second elastic element 18 between the first sealing friction plate 1 and the second sealing friction plate 7, horizontal compensation is formed between the first sealing friction plate 1 and the second sealing friction plate 7. Based on this, the upper, lower, and horizontal directions together constitute three-way compensation, which can compensate for the horizontal gap of the trolley, thereby achieving a better sealing effect. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Appendix Figure 1 This is a three-dimensional structural schematic diagram of the three-way compensation trolley sealing device provided in an embodiment of the present invention;

[0037] Appendix Figure 2 This is a top view of the three-way compensation trolley sealing device provided in an embodiment of the present invention;

[0038] Appendix Figure 3 For the appendix Figure 2 Sectional view along axis AA;

[0039] Appendix Figure 4 For the appendix Figure 3 A partially enlarged structural diagram of section B;

[0040] Appendix Figure 5 For the appendix Figure 3 A partially enlarged structural diagram of section D;

[0041] Appendix Figure 6 For the appendix Figure 3 A magnified schematic diagram of a portion of the structure in section E;

[0042] Appendix Figure 7 For the appendix Figure 3 A partially enlarged structural diagram of section F in the middle;

[0043] Appendix Figure 8 This is a bottom view of the three-way compensation trolley sealing device provided in an embodiment of the present invention.

[0044] Appendix Figure 9 For the appendixFigure 8 Fig. 6 is a sectional view of the middle C-C;

[0045] Fig. 7 is a partial enlarged structural schematic view of the middle C part; Figure 10 Fig. 8 is a partial enlarged structural schematic view of the middle D part; Figure 8 Fig. 9 is a partial enlarged structural schematic view of the middle E part;

[0046] Fig. 10 is a partial enlarged structural schematic view of the middle F part; Figure 11 Fig. 11 is a partial enlarged structural schematic view of the middle G part; Figure 8 Fig. 12 is a partial enlarged structural schematic view of the middle H part;

[0047] Fig. 13 is a partial enlarged structural schematic view of the middle I part; Figure 12 Fig. 14 is a three-dimensional structural schematic view of the three-way compensation type trolley sealing device provided by the embodiment of the present application after the sealing cover plate is removed;

[0048] Fig. 15 is a partial enlarged structural schematic view of the middle J part; Figure 13 Fig. 16 is a partial enlarged structural schematic view of the middle K part; Figure 12 Fig. 17 is a three-dimensional structural schematic view of the sealing cover plate of the three-way compensation type trolley sealing device provided by the embodiment of the present application from the back side;

[0049] Fig. 18 is a partial enlarged structural schematic view of the middle L part; Figure 14 Fig. 19 is a front structural schematic view of the three-way compensation type trolley sealing device provided by the embodiment of the present application; Figure 12 Fig. 20 is a sectional view of the M-M of the three-way compensation type trolley sealing device provided by the embodiment of the present application;

[0050] Fig. 21 is a partial enlarged structural schematic view of the middle N part. Figure 15 Fig. 22 is a three-dimensional structural schematic view of the three-way compensation type trolley sealing device provided by the embodiment of the present application from the back side;

[0051] Fig. 23 is a partial enlarged structural schematic view of the middle O part; Figure 16 Fig. 24 is a partial enlarged structural schematic view of the middle P part; Figure 15 Fig. 25 is a partial enlarged structural schematic view of the middle Q part; Fig. 26 is a partial enlarged structural schematic view of the middle R part;

[0052] Fig. 27 is a front structural schematic view of the three-way compensation type trolley sealing device provided by the embodiment of the present application; Figure 17 Fig. 28 is a sectional view of the S-S of the three-way compensation type trolley sealing device provided by the embodiment of the present application; Fig. 29 is a three-dimensional structural schematic view of the three-way compensation type trolley sealing device provided by the embodiment of the present application from the back side;

[0053] Fig. 30 is a partial enlarged structural schematic view of the middle T part; Figure 18 Fig. 31 is a partial enlarged structural schematic view of the middle U part; Figure 17 Fig. 32 is a partial enlarged structural schematic view of the middle V part; Fig. 33 is a partial enlarged structural schematic view of the middle W part;

[0054] Fig. 34 is a partial enlarged structural schematic view of the middle X part; Figure 19 Fig. 35 is a partial enlarged structural schematic view of the middle Y part. Figure 18 DETAILED DESCRIPTION

[0055] Therefore, the present application provides a three-way compensation type trolley sealing device, which can compensate the trolley sealing in the vertical direction and the horizontal direction, can improve the sealing effect when used for trolley sealing, and is more suitable for practical use.

[0056] The inventor found that the trolley seal between the existing sintering machine trolley and the sintering machine air bellow slide is mostly of the traditional up-down compensation type, whose working principle is that the spring is used as the elastic element, and the thin stainless steel plate or rubber is used as the sealing element of the upper and lower box. The trolley seal adopts the fixed size metal seal (the sealing size is fixed), and the sealing surface is processed (without self-size compensation and self-lubricating device), which specifically includes:

[0057] 1. Since the size of the trolley seal is generally smaller than the length of the trolley (for example, the trolley seal size of a 1500mm trolley is generally 1495-1498mm), the purpose is to prevent the deformation and damage of the seal caused by the extrusion and collision between adjacent trolley seals when the trolley overturns. In addition, the actual old trolley used online is generally smaller than the standard size, and the consistency of batches and use time is not good, so there is actually a gap of 2-10mm between the trolley seals, which forms a wind leakage point. Since the number of trolleys of the sintering machine is large, the cumulative wind leakage of the wind leakage point can magnify the problem.

[0058] 2. The lubrication method is simply lubricated by lubricating oil, and the negative pressure will absorb the lubricating oil, so the oil consumption is high.

[0059] 3. The thin stainless steel plate or rubber is used as the sealing element of the upper and lower box, and the deformation or blockage of the stainless steel plate after long-term use will affect the elastic compensation of the trolley seal. The rubber has poor high-temperature resistance and short service life in the high-temperature environment of the hot section of the sintering machine.

[0060] 4. The sealing compensation amount is small, and the compensation range of this type of seal is generally 10-12mm. Due to the small trolley seal compensation amount, the lower bottom surface of the trolley seal cannot completely fit the slide, and due to the limitation of the real compensation ability of the upper and lower box of the trolley seal by the stainless steel plate after long-term use (the trolley seal loses the compensation range), the wind leakage is large, and the sealing performance is poor.

[0061] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the specific implementation, structure, features and effects of the three-way compensation type trolley seal device according to the present application are described in detail as follows. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0062] The term "and / or", used herein merely describes an associated relationship, and indicates that there can be three relationships, for example, A and / or B, which specifically means that A and B can exist simultaneously, A can exist alone, or B can exist alone, and any one of the above three cases can exist.

[0063] Referring to the drawings Figure 1 -attached Figure 19 The three-way compensation type trolley sealing device provided by the embodiment of the application comprises a sealing friction plate, a sealing cover plate 2, a first elastic member 17 and a second elastic member 18. The sealing friction plate comprises a first sealing friction plate 1 and a second sealing friction plate 7, and a moving pair is formed between the first sealing friction plate 1 and the second sealing friction plate 7, so that the axial farthest distance between the first sealing friction plate 1 and the second sealing friction plate 7 is equal to the axial length of the sealing cover plate 2. The first elastic member 17 is arranged between the sealing cover plate 2 and the sealing friction plate. The second elastic member 18 is arranged between the first sealing friction plate 1 and the second sealing friction plate 7.

[0064] The three-way compensation type trolley sealing device provided by the embodiment of the application comprises a sealing friction plate, a sealing cover plate 2, a first elastic member 17 and a second elastic member 18. The sealing friction plate comprises a first sealing friction plate 1 and a second sealing friction plate 7, and a moving pair is formed between the first sealing friction plate 1 and the second sealing friction plate 7, so that the axial farthest distance between the first sealing friction plate 1 and the second sealing friction plate 7 is equal to the axial length of the sealing cover plate 2. The first elastic member 17 is arranged between the sealing cover plate 2 and the sealing friction plate. The second elastic member 18 is arranged between the first sealing friction plate 1 and the second sealing friction plate 7. The three-way compensation type trolley sealing device provided by the embodiment of the application comprises a sealing friction plate, a sealing cover plate 2, a first elastic member 17 and a second elastic member 18. The sealing friction plate comprises a first sealing friction plate 1 and a second sealing friction plate 7, and a moving pair is formed between the first sealing friction plate 1 and the second sealing friction plate 7, so that the axial farthest distance between the first sealing friction plate 1 and the second sealing friction plate 7 is equal to the axial length of the sealing cover plate 2. The first elastic member 17 is arranged between the sealing cover plate 2 and the sealing friction plate. The second elastic member 18 is arranged between the first sealing friction plate 1 and the second sealing friction plate 7. The three-way compensation type trolley sealing device provided by the embodiment of the application comprises a sealing friction plate, a sealing cover plate 2, a first elastic member 17 and a second elastic member 18. The sealing friction plate comprises a first sealing friction plate 1 and a second sealing friction plate 7, and a moving pair is formed between the first sealing friction plate 1 and the second sealing friction plate 7, so that the axial farthest distance between the first sealing friction plate 1 and the second sealing friction plate 7 is equal to the axial length of the sealing cover plate 2. The first elastic member 17 is arranged between the sealing cover plate 2 and the sealing friction plate. The second elastic member 18 is arranged between the first sealing friction plate 1 and the second sealing friction plate 7. The three-way compensation type trolley sealing device provided by the embodiment of the application comprises a sealing friction plate, a sealing cover plate 2, a first elastic member 17 and a second elastic member 18. The sealing friction plate comprises a first sealing friction plate 1 and a second sealing friction plate 7, and a moving pair is formed between the first sealing friction plate 1 and the second sealing friction plate 7, so that the axial farthest distance between the first sealing friction plate 1 and the second sealing friction plate 7 is equal to the axial length of the sealing cover plate 2. The first elastic member 17 is arranged between the sealing cover plate 2 and the sealing friction plate. The second elastic member 18 is arranged between the first sealing friction plate 1 and the second sealing friction plate 7.

[0065] In the three-way compensation type trolley sealing device, the first sealing friction plate 1 is provided with a socket 21 for connecting with the connecting end of the second sealing friction plate 7, and the second sealing friction plate 2 is provided with an insertion piece for connecting with the connecting end of the first sealing friction plate 1. The limiting pin 9 is fixedly connected to the socket 21, and the insertion piece is provided with a limiting hole 8. The movement pair formed between the first sealing friction plate 1 and the second sealing friction plate 7 is limited by the cooperation between the limiting pin 9 and the limiting hole 8. In this case, the cooperation between the limiting pin 9 and the limiting hole 8 can ensure the centering and prevent deviation during the relative horizontal movement between the first sealing friction plate 1 and the second sealing friction plate 7.

[0066] In the three-way compensation type trolley sealing device, the first sealing friction plate 1 is provided with a socket 21 for connecting with the connecting end of the second sealing friction plate 7, and the second sealing friction plate 2 is provided with an insertion piece for connecting with the connecting end of the first sealing friction plate 1. The limiting pin 9 is fixedly connected to the socket 21, and the insertion piece is provided with a limiting hole 8. The movement pair formed between the first sealing friction plate 1 and the second sealing friction plate 7 is limited by the cooperation between the limiting pin 9 and the limiting hole 8. In this case, the cooperation between the limiting pin 9 and the limiting hole 8 can ensure the centering and prevent deviation during the relative horizontal movement between the first sealing friction plate 1 and the second sealing friction plate 7.

[0067] In the three-way compensation type trolley sealing device, the first sealing friction plate 1 is provided with a socket 21 for connecting with the connecting end of the second sealing friction plate 7, and the second sealing friction plate 2 is provided with an insertion piece for connecting with the connecting end of the first sealing friction plate 1. The limiting pin 9 is fixedly connected to the socket 21, and the insertion piece is provided with a limiting hole 8. The movement pair formed between the first sealing friction plate 1 and the second sealing friction plate 7 is limited by the cooperation between the limiting pin 9 and the limiting hole 8. In this case, the cooperation between the limiting pin 9 and the limiting hole 8 can ensure the centering and prevent deviation during the relative horizontal movement between the first sealing friction plate 1 and the second sealing friction plate 7.

[0068] The three-way compensation type trolley sealing device further comprises a guide column 20. The guide column 20 is fixedly connected to any one of the corresponding surfaces of the first sealing friction plate 1, the second sealing friction plate 7 and the sealing cover plate 2. A third limiting groove 12 is arranged on the other of the first sealing friction plate 1, the second sealing friction plate 7 and the sealing cover plate 2, and corresponds to the guide column 20. One end of the first elastic member 17 is sleeved on the guide column 20, and the other end of the first elastic member 17 is embedded in the third limiting groove 12. In this case, when the first sealing friction plate 1 and the second sealing friction plate 7 move relative to the sealing cover plate 2 in the vertical direction, the first elastic member can not deviate under the limitation of the guide column 20 and the third limiting groove 12. In the embodiment, the diameter of the guide column 20 is equal to the inner diameter of the first elastic member 17, and the inner diameter of the third limiting groove 12 is equal to the outer diameter of the first elastic member 17.

[0069] The first elastic member 17 and / or the second elastic member 18 are cylindrical springs. The technical solution of the cylindrical spring is simple, low in cost and easy to implement.

[0070] The three-way compensation type trolley sealing device further comprises a first sealing member 19 and a second sealing member 29. The first sealing member 19 is fixedly connected to any one of the corresponding surfaces of the first sealing friction plate 1, the second sealing friction plate 7 and the sealing cover plate 2 in the axial direction. The second sealing member 29 is fixedly connected to the corresponding position of the other of the corresponding surfaces of the first sealing friction plate 1, the second sealing friction plate 7 and the sealing cover plate 2. The second sealing member 29 is provided with a gap at the position matched with the first sealing member 19, so that the first sealing member 19 and the gap can be matched in clearance, the first sealing member 19 can freely enter and exit the gap in the vertical direction, and when the first sealing member 19 is in the gap, the first sealing member 19, the second sealing member 29, the side wall of the first sealing friction plate 1, the side wall of the second sealing friction plate 7 and the side wall of the sealing cover plate 2 jointly form a labyrinth seal in the axial direction. In the embodiment, the second sealing member 29 is provided with a first wing 31 and a second wing 32 at one end matched with the first sealing member 19. The distance between the first wing 31 and the second wing 32 decreases from top to bottom, forming a gap. Two stainless steel sealing strips (folded into right angles for easy welding) are welded on the upper sealing cover plate of the trolley sealing, and four stainless steel sealing strips (folded into right angles for easy welding) are welded on the lower sealing plate. After the upper and lower trolley sealing is installed, a labyrinth structure is formed, which can effectively reduce the wind resistance. Since the thickness of the stainless steel sealing plate is relatively small (0.2-0.3mm), the stainless steel sealing plate will be deformed and attached to the adjacent sealing plate due to the negative pressure of the sintering machine in actual application, achieving good sealing effect.

[0071] The bottom surface of the first sealing friction plate 1 and the second sealing friction plate 7 is provided with a plurality of blind holes 6, and graphite columns are embedded in the blind holes 6. The working principle of self-lubrication of the graphite columns is as follows: a plurality of threaded blind holes are processed on the trolley sealing plate, and the graphite columns are processed into external thread state, then the threaded graphite columns are screwed into the threaded holes, the graphite columns are cut and polished to be flush. In actual application, the surface of the trolley sealing plate will form metal sliding friction with the lower slide, that is, the sealing plate surface will be worn out with the accumulation of use time, and the graphite columns will also be worn out into smaller particles. The graphite particles will form a lubricating layer between the surface of the trolley sealing plate and the surface of the slide plate, achieving the purpose of automatic lubrication.

[0072] Although preferred embodiments of the application have been described herein, changes and modifications can be suggested to one skilled in the art, and it is intended that the application encompass such changes and modifications as fall within the scope of the appended claims.

[0073] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A three-way compensating trolley sealing device, characterized in that, The sealing friction plate comprises a first sealing friction plate (1) and a second sealing friction plate (7), and a moving pair is formed between the first sealing friction plate (1) and the second sealing friction plate (7), so that the axial farthest distance of the first sealing friction plate (1) and the second sealing friction plate (7) is equal to the axial length of the sealing cover plate (2); The first elastic member (17) is arranged between the sealing cover plate (2) and the first sealing friction plate (1) or between the sealing cover plate (2) and the second sealing friction plate (7); The second elastic member (18) is arranged between the first sealing friction plate (1) and the second sealing friction plate (7); Further comprising a limiting pin (9), On the first sealing friction plate (1), a socket part (21) is formed for connecting with the connecting end of the second sealing friction plate (7), On the second sealing friction plate (2), an insertion piece is formed for connecting with the connecting end of the first sealing friction plate (1), The limiting pin (9) is fixedly connected to the socket part (21), A limiting hole (8) is arranged on the insertion piece, The moving pair formed between the first sealing friction plate (1) and the second sealing friction plate (7) is limited by the cooperation between the limiting pin (9) and the limiting hole (8); The bottom surface of the first sealing friction plate (1) and the second sealing friction plate (7) is provided with a plurality of blind holes (6), and a graphite column is embedded in the blind hole (6).

2. The three-way compensation type trolley sealing device according to claim 1, wherein, A limiting boss (22) is formed between the first sealing friction plate (1) and the socket part (21), When the limiting pin (9) is in the right limit position of the limiting hole (8), the spacing between the rightmost end of the insertion piece and the limiting boss (22) is equal to the maximum stroke of the limiting pin (9). The limiting pin (9) is a cylindrical pin, and the limiting hole (8) is an oblong hole, and the diameter of the cylindrical pin is equal to the diameter of the oblong hole.

3. The tri-compensated dolly seal of claim 1, wherein, Further comprising a first limiting groove (11) and a second limiting groove (10), 4. The tri-compensated dolly seal of claim 1, wherein, The first limiting groove (11) is fixedly connected to the first sealing friction plate (1) and forms a first containing space inside the first sealing friction plate (1) The second limiting groove (10) is fixedly connected to the second sealing friction plate (7) and forms a second containing space inside the second sealing friction plate (7); The radial cross-sectional shape of the second elastic member (18) is the same as the radial cross-sectional shape of the first containing space and the second containing space. Further comprising a guide column (20), 5. The tri-compensated dolly seal of claim 1, wherein, The guide column (20) is fixedly connected to any one of the corresponding faces of the first sealing friction plate (1), the second sealing friction plate (7) and the sealing cover plate (2); and a third limiting groove (12) is arranged at a position corresponding to the guide column (20) on the other one of the first sealing friction plate (1), the second sealing friction plate (7) and the sealing cover plate (2). ​ One end of the first elastic member (17) is sleeved on the guide column (20), and the other end of the first elastic member (17) is embedded in the third limiting groove (12).

6. The tri-compensated dolly seal of claim 1, wherein, The first elastic member (17) and / or the second elastic member (18) is a cylindrical spring.

7. The tri-compensated dolly seal of claim 1, wherein, Further comprising a first sealing member (19) and a second sealing member (29), The first sealing member (19) is fixedly connected to any one of the corresponding surfaces of the first sealing friction plate (1), the second sealing friction plate (7) and the sealing cover plate (2) in the axial direction; on the other corresponding surface of the first sealing friction plate (1), the second sealing friction plate (7) and the sealing cover plate (2), the second sealing member (29) is fixedly connected to the position corresponding to the first sealing member (19); The second sealing member (29) is provided with a gap at the position matched with the first sealing member (19), so that the first sealing member (19) and the gap can be gap matched, so that the first sealing member (19) can freely enter and exit the gap in the vertical direction, so that when the first sealing member (19) is in the gap, the first sealing member (19), the second sealing member (29), the side wall of the first sealing friction plate (1), the second sealing friction plate (7) and the side wall of the sealing cover plate (2) together form a labyrinth seal in the axial direction.

8. The tri-compensated dolly seal of claim 7, wherein, The second sealing member (29) is provided with a first wing (31) and a second wing (32) at one end for matching with the first sealing member (19), The distance between the first wing (31) and the second wing (32) decreases from top to bottom, forming the gap.

Images