Spring-loaded seal group

Abstract

The present invention belongs to the technical field of sealing equipment, and specifically discloses a spring-loaded sealing group, including a bellows group, a sealing seat, a pressure cover, a sleeve and a fixing member; the two sides of the bellows group are respectively fixed to the side plates of the fan casing and the sealing seat, the sleeve is installed on the fan main shaft, the sealing seat is installed in the circumference of the sleeve, and the fixing member is installed on the fan main shaft and is used to prevent the sleeve from moving; the bellows group includes a bellows, a first connecting component and a second connecting component; the sealing seat is provided with an annular mounting groove, the mounting groove is provided with a sealing component, and the pressure cover can press the sealing component into the mounting groove. The above-mentioned sealing group can solve the problem that the existing sealing component cannot be applied to the thermal deformation of the casing, resulting in poor sealing effect and gas leakage. The bellows can effectively absorb the deformation of the fan casing, prevent deformation caused by the sealing component, ensure the sealing effect, and at the same time ensure that the sealing group is concentric with the fan main shaft.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing equipment, and in particular relates to a spring-pressed sealing group. Background Art

[0002] Centrifugal fans are one of the main supporting equipment for sintering systems, coke oven flue gas purification systems, dust removal systems, etc. Since the media in sintering systems, coke oven flue gas purification systems, dust removal systems, etc. are mostly high-temperature flue gas, the shaft end seals of the fans are installed in a cold state. When the fans are running under heat load, the casing will be thermally deformed and produce a certain amount of thermal displacement. The current sealing components cannot adapt well to the thermal deformation of the casing, which will result in poor sealing effect and gas leakage. Summary of the invention

[0003] The object of the present invention is to provide a spring-pressed sealing assembly to solve the problem that the existing sealing assembly cannot adapt to the thermal deformation of the casing, resulting in poor sealing effect and gas leakage.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a spring-loaded sealing group, including a bellows group, a sealing seat, a pressure cover, a sleeve and a fixing part; the two sides of the bellows group are respectively fixed to the side plate of the fan casing and the sealing seat, the sleeve is installed on the main shaft of the fan, the sealing seat is installed in the circumference of the sleeve, and the fixing part is installed on the main shaft of the fan and is used to prevent the sleeve from moving; the bellows group includes a bellows and a first connecting component and a second connecting component respectively fixed to the two ends of the bellows, the first connecting component and the second connecting component are respectively connected and fixed to the side plate of the fan casing and the sealing seat; the sealing seat is provided with an annular mounting groove on the side away from the bellows group, an annular sealing component is installed in the mounting groove, and the pressure cover can be fixed to the sealing seat and press the sealing component into the mounting groove.

[0005] Further, the sealing assembly includes a first sealing ring group and a second sealing ring group, the second sealing ring group is located on a side close to the gland; the first sealing ring group includes a first sealing ring, a first pressing member, a second sealing ring and a second pressing member, the second sealing ring is located on a side close to the second sealing ring group; the first sealing ring includes a plurality of first sealing ring members, and the plurality of first sealing ring members are combined to form an annular first sealing ring; a first pressing groove is formed at the end of the first sealing ring member, and the plurality of first pressing grooves form a first ring groove, and the first pressing member can be located in the first ring groove and press the plurality of first sealing ring members onto the fan main shaft; the second sealing ring includes A plurality of second sealing ring components are combined to form an annular second sealing ring; a second clamping groove is opened at the end of the second sealing ring component, and the plurality of second clamping grooves form a second ring groove, and the second clamping component can be located in the second ring groove and press the plurality of second sealing ring components onto the main shaft of the fan; the second sealing ring group includes a third clamping component and a plurality of third sealing ring components, and the plurality of third sealing ring components are combined to form an annular third sealing ring; a third clamping groove is opened at the end of the third sealing ring component, and the plurality of third clamping grooves form a third ring groove, and the third clamping component can be located in the third ring groove and press the plurality of third sealing ring components onto the main shaft of the fan.

[0006] Furthermore, a fourth clamping groove is provided on a side of the third sealing ring component close to the pressure cover, and a plurality of the fourth clamping grooves form an annular pressure groove; a plurality of pressure holes are provided on a side of the pressure cover close to the second sealing ring group, and a plurality of the pressure holes can correspond to the pressure groove; a fourth clamping component is installed between the pressure groove and the pressure hole.

[0007] Furthermore, the second sealing ring and the second sealing ring group are both provided with a plurality of first positioning pin holes in their circumferential directions, the pressure cover is provided with a plurality of second positioning pin holes, and positioning pins are installed between the first positioning pin holes and the second positioning pin holes.

[0008] Furthermore, the inner hole of the shaft sleeve is set to be stepped, and the stepped shape of the shaft sleeve can adapt to the main shaft of the fan, and the fixing part is located on the side with a smaller inner diameter of the inner hole of the shaft sleeve.

[0009] Furthermore, the sealing seat includes a vertical plate and a flat plate, the vertical plate is fixed to the bellows group, the flat plate is connected to the bracket, and the vertical plate is provided with a mounting groove and a through hole for mounting the fan main shaft.

[0010] Furthermore, a sealing gasket is provided between the second connecting assembly and the sealing seat.

[0011] Furthermore, the first sealing ring, the second sealing ring and the third sealing ring are all made of graphite rings; the first pressing member, the second pressing member and the third pressing member are made of annular springs; and the fourth pressing member is made of compression springs.

[0012] Furthermore, the first connecting component and the second connecting component both adopt connecting flanges, and the first connecting component and the second connecting component are respectively provided with a plurality of first threaded holes and second threaded holes in the circumference thereof, the side panel of the casing is provided with a third threaded hole corresponding to the first threaded hole, and the sealing seat is provided with a fourth threaded hole corresponding to the second threaded hole, and the side panel of the casing and the first connecting component, and the second connecting component and the sealing seat are respectively connected by first bolts and second bolts.

[0013] Furthermore, the sealing seat and the gland are provided with a plurality of fifth threaded holes and sixth threaded holes in the circumferential direction respectively, the fifth threaded holes and the sixth threaded holes can correspond to each other, and the gland and the sealing seat are connected by a third bolt.

[0014] The beneficial effects of this technical solution are: ① When any axial or radial deformation occurs in the fan casing, the bellows can effectively absorb these deformations and prevent the deformation of the sealing assembly, thereby ensuring the sealing effect, and also ensuring that the sealing group is concentric with the fan main shaft. ② Through the fixing and pressing action of the annular spring and the compression spring, the first sealing ring, the second sealing ring and the third sealing ring can be tightly held on the fan main shaft, and can fit tightly together, playing a very good sealing role. ③ The compression spring can compress the sealing assembly, and the locating pin can prevent the first sealing ring, the second sealing ring and the third sealing ring from rotating. ④ The fixing part can press the sleeve tightly to prevent it from axial movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the elastic pressure sealing group of the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure of the middle bellows group;

[0017] Figure 3 for Figure 1 The front view of the middle sealing seat;

[0018] Figure 4 It is a side view as shown in 3;

[0019] Figure 5 for Figure 1 A schematic structural diagram of the first sealing ring group;

[0020] Figure 6 for Figure 1 A schematic diagram of the structure of the second sealing ring group;

[0021] Figure 7 for Figure 3 A schematic structural diagram of the first sealing ring;

[0022] Figure 8for Figure 7 Side view of

[0023] Fig. 9 for Figure 5 A schematic structural diagram of the second sealing ring;

[0024] Fig.10 for Fig. 9 Side view of

[0025] Fig.11 for Figure 6 AA map;

[0026] Fig.12 for Figure 1 Schematic diagram of the structure of the middle pressure cover;

[0027] Fig.13 for Fig.12 BB chart;

[0028] Fig.14 for Figure 1 Schematic diagram of the structure of the middle shaft sleeve;

[0029] Fig.15 for Figure 1 Schematic diagram of the structure of the fixing parts. DETAILED DESCRIPTION

[0030] The following is further described in detail through specific implementation methods:

[0031] The figure marks in the drawings of the specification include: bellows group 1, sealing seat 2, pressure cover 3, sleeve 4, fixing part 5, casing side plate 6, fan main shaft 7, bellows 8, first connecting component 9, second connecting component 10, mounting groove 11, sealing component 12, fifth threaded hole 13, sixth threaded hole 14, first sealing ring 16, second sealing ring 15, first sealing ring component 17, second sealing ring component 18, first clamping groove 19, second clamping groove 20, third sealing ring component 21, third clamping groove 22, pressing groove 23, pressing hole 24, first locating pin hole 25, second locating pin hole 26, vertical plate 27, flat plate 28, bracket 29, first threaded hole 30, second threaded hole 31, fourth threaded hole 32, sealing gasket 33, first bolt 34, second bolt 35, third bolt 36, fourth bolt 37.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The embodiment is basically as shown in the attached Figure 1-15 As shown: Spring-type sealing group, such as Figure 1 As shown, it includes a bellows group 1, a sealing seat 2, a pressure cover 3, a sleeve 4 and a fixing part 5; the two sides of the bellows group 1 are respectively fixed to the fan casing side plate 6 and the sealing seat 2, the sleeve 4 is installed on the fan main shaft 7, the sealing seat 2 is installed on the circumference of the sleeve 4, and the fixing part 5 is installed on the fan main shaft 7 and is used to prevent the sleeve 4 from moving.

[0034] like Figure 2 As shown, the bellows assembly 1 includes a bellows 8 and a first connecting assembly 9 and a second connecting assembly 10 respectively fixed to both ends of the bellows 8. The first connecting assembly 9 and the second connecting assembly 10 are respectively connected and fixed to the fan casing side plate 6 and the sealing seat 2. Figure 3 , 4 As shown, the sealing seat 2 is provided with an annular mounting groove 11 on one side away from the bellows assembly 1, and an annular sealing assembly 12 is installed in the mounting groove 11. The gland 3 can be fixed to the sealing seat 2 and press the sealing assembly 12 into the mounting groove 11; Figure 4 , 12 As shown, specifically, a plurality of fifth threaded holes 13 and sixth threaded holes 14 are respectively provided in the circumference of the sealing seat 2 and the gland 3 , the fifth threaded holes 13 and the sixth threaded holes 14 can correspond to each other, and the gland 3 and the sealing seat 2 are connected by third bolts 36 .

[0035] The sealing assembly 12 includes a first sealing ring group and a second sealing ring group, and the second sealing ring group is located on a side close to the gland 3; Figure 5 , 7 As shown in , 8, the first sealing ring group includes a first sealing ring 16, a first pressing member, a second sealing ring 15 and a second pressing member, and the second sealing ring 15 is located on the side close to the second sealing ring group; the first sealing ring 16 includes a plurality of first sealing ring members 17, and the plurality of first sealing ring members 17 are combined to form an annular first sealing ring 16; a first pressing groove 19 is opened at the end of the first sealing ring member 17, and the plurality of first pressing grooves 19 form a first ring groove, and the first pressing member can be located in the first ring groove and press the plurality of first sealing ring members 17 onto the fan main shaft 7. Figure 5 , 9 As shown in FIG. 10 , the second sealing ring 15 includes a plurality of second sealing ring members 18 , which are combined to form an annular second sealing ring 15 ; a second pressing groove 20 is formed at the end of the second sealing ring member 18 , and the plurality of second pressing grooves 20 form a second annular groove, and the second pressing member can be located in the second annular groove and press the plurality of second sealing ring members 18 onto the fan main shaft 7 . Figure 6 , 11As shown, the second sealing ring group includes a third clamping member and a plurality of third sealing ring members 21, and the plurality of third sealing ring members 21 are combined to form an annular third sealing ring; a third clamping groove 22 is opened at the end of the third sealing ring member 21, and the plurality of third clamping grooves 22 form a third annular groove, and the third clamping member can be located in the third annular groove and press the plurality of third sealing ring members 21 onto the fan main shaft 7.

[0036] like Figure 6 As shown, a fourth pressing groove is provided on one side of the third sealing ring 21 close to the gland 3, and a plurality of fourth pressing grooves form an annular pressing groove 23; Fig.12 , 13 As shown, a plurality of pressing holes 24 are provided on one side of the pressure cover 3 close to the second sealing ring assembly, and the plurality of pressing holes 24 can correspond to the pressing grooves 23 ; a fourth pressing member is installed between the pressing grooves 23 and the pressing holes 24 .

[0037] like Figure 6 As shown, the second sealing ring 15 and the second sealing ring group are both provided with a plurality of first positioning pin holes 25 in the circumferential direction. Fig.12 , 13 As shown, a plurality of second positioning pin holes 26 are provided on the pressure cover 3 , and positioning pins are installed between the first positioning pin holes 25 and the second positioning pin holes 26 .

[0038] like Fig.14 As shown, the inner hole of the sleeve 4 is set to be stepped, and the stepped shape of the sleeve 4 can adapt to the fan main shaft 7, such as Figure 1 , 15 As shown, the fixing member 5 is located on the side with a smaller inner diameter of the inner hole of the shaft sleeve 4 , and the fixing member 5 is a nut, and a thread matching the nut 5 is provided at a corresponding position on the fan main shaft 7 .

[0039] like Figure 3 , 4 As shown, the sealing seat 2 includes a vertical plate 27 and a flat plate 28. The vertical plate 27 is fixed to the bellows group 1. The flat plate 28 is connected to the bracket 29 via a fourth bolt 37. The vertical plate 27 is provided with a mounting groove 11 and a through hole for mounting the fan main shaft 7.

[0040] The first sealing ring 17, the second sealing ring 18 and the third sealing ring 21 are all made of graphite rings; the first pressing member, the second pressing member and the third pressing member are made of annular springs; the fourth pressing member is made of compression springs. There are 8 first sealing rings 17, 8 second sealing rings 18 and 8 third sealing rings 21 respectively.

[0041] like Figure 1 , 2As shown in , 4, the first connecting assembly 9 and the second connecting assembly 10 both use connecting flanges, and the first connecting assembly 9 and the second connecting assembly 10 are respectively provided with a plurality of first threaded holes 30 and second threaded holes 31 in the circumferential direction, the casing side plate 6 is provided with a third threaded hole corresponding to the first threaded hole 30, and the sealing seat 2 is provided with a fourth threaded hole 32 corresponding to the second threaded hole 31, and the casing side plate 6 and the first connecting assembly 9, the second connecting assembly 10 and the sealing seat 2 are respectively connected by a first bolt 34 and a second bolt 35. A sealing gasket 33 is provided between the second connecting assembly 10 and the vertical plate 27, and a through hole for passing the second bolt 35 is provided on the sealing gasket 33.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can know all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Spring-pressed sealing group, characterized by: The invention comprises a bellows assembly (1), a sealing seat (2), a gland (3), a sleeve (4) and a fixing member (5); the two sides of the bellows assembly (1) are respectively fixed to the side plate (6) of the fan casing and the sealing seat (2); the sleeve (4) is mounted on the fan main shaft (7); the sealing seat (2) is mounted on the circumference of the sleeve (4); the fixing member (5) is mounted on the fan main shaft (7) and is used to prevent the sleeve (4) from moving; the bellows assembly (1) comprises a bellows (8) and a first connecting component (9) and a second connecting component (10) respectively fixed to the two ends of the bellows (8); the first connecting component (9) and the second connecting component (10) are respectively connected to the side plate (6) of the fan casing and the sealing seat (2). The sealing seat (2) is provided with an annular mounting groove (11) on a side away from the bellows assembly (1), an annular sealing assembly (12) is installed in the mounting groove (11), and the gland (3) can be fixed to the sealing seat (2) and press the sealing assembly (12) in the mounting groove (11); the sealing assembly (12) includes a first sealing ring assembly and a second sealing ring assembly, and the second sealing ring assembly is located on a side close to the gland (3); the first sealing ring assembly includes a first sealing ring (16), a first pressing member, a second sealing ring (15) and a second pressing member, and the second sealing ring (15) is located on a side close to the second sealing ring assembly; the first sealing ring (16) includes a plurality of first sealing ring members (1 7), a plurality of first sealing ring members (17) are combined to form an annular first sealing ring (16); a first pressing groove (19) is opened at the end of the first sealing ring member (17), and a plurality of first pressing grooves (19) form a first ring groove, and the first pressing member can be located in the first ring groove and press the plurality of first sealing ring members (17) onto the fan main shaft (7); the second sealing ring (15) includes a plurality of second sealing ring members (18), and a plurality of second sealing ring members (18) are combined to form an annular second sealing ring (15); a second pressing groove (20) is opened at the end of the second sealing ring member (18), and a plurality of second pressing grooves (20) form a second ring groove, and the second pressing member can be located in the second ring The second sealing ring assembly comprises a third pressing member and a plurality of third sealing ring members (21), and the plurality of third sealing ring members (21) are combined to form an annular third sealing ring; a third pressing groove is formed at the end of the third sealing ring member (21), and a plurality of third pressing grooves (22) form a third annular groove, and the third pressing member can be located in the third annular groove and press the plurality of third sealing ring members (21) onto the fan main shaft (7); the inner side of the first sealing ring member (17) is arc-shaped, the outer side of the first sealing ring member (17) is convex in the middle, and the two sides transition to the edge of the first sealing ring member (17), and the second sealing ring member (18) is an arc-shaped structure;The first sealing ring (17) and the second sealing ring (18) are arranged at intervals, and the two sides of the second sealing ring (18) are located at the transition part of the two adjacent groups of first sealing rings (17); the third sealing ring (21) is provided with a fourth pressing groove on one side close to the gland (3), and a plurality of the fourth pressing grooves form an annular pressing groove (23); the gland (3) is provided with a plurality of pressing holes (24) on one side close to the second sealing ring group, and the plurality of pressing holes (24) can correspond to the pressing groove (23); the fourth pressing member is installed between the pressing groove (23) and the pressing hole (24). ; 2. The spring-loaded sealing assembly according to claim 1, characterized in that: The second sealing ring (15) and the second sealing ring group are both provided with a plurality of first positioning pin holes (25) in the circumferential direction, the gland (3) is provided with a plurality of second positioning pin holes (26), and positioning pins are installed between the first positioning pin holes (25) and the second positioning pin holes (26).

3. The spring-loaded sealing assembly according to claim 1, characterized in that: The inner hole of the shaft sleeve (4) is configured in a stepped shape, and the stepped shape of the shaft sleeve (4) can adapt to the fan main shaft (7), and the fixing member (5) is located on the side with a smaller inner diameter of the inner hole of the shaft sleeve (4).

4. The spring-loaded sealing assembly according to claim 1, characterized in that: The sealing seat (2) comprises a vertical plate (27) and a flat plate (28); the vertical plate (27) is fixed to the bellows assembly (1); the flat plate (28) is connected to a bracket (29); and the vertical plate (27) is provided with a mounting groove (11) and a through hole for mounting a fan main shaft (7).

5. The spring-loaded sealing assembly according to claim 1, characterized in that: A sealing gasket (33) is provided between the second connecting assembly (10) and the sealing seat (2).

6. The spring-loaded sealing assembly according to claim 1, characterized in that: The first sealing ring (17), the second sealing ring (18) and the third sealing ring (21) are all graphite rings; the first pressing member, the second pressing member and the third pressing member are annular springs; and the fourth pressing member is a compression spring.

7. The spring-loaded sealing assembly according to claim 1, characterized in that: The first connecting component (9) and the second connecting component (10) both use connecting flanges. The first connecting component (9) and the second connecting component (10) are respectively provided with a plurality of first threaded holes (30) and second threaded holes (31) in the circumferential direction. The casing side plate (6) is provided with a third threaded hole corresponding to the first threaded hole (30). The sealing seat (2) is provided with a fourth threaded hole (32) corresponding to the second threaded hole (31). The casing side plate (6) and the first connecting component (9), the second connecting component (10) and the sealing seat (2) are respectively connected by a first bolt (34) and a second bolt (35).

8. The spring-loaded sealing assembly according to claim 1, characterized in that: The sealing seat (2) and the gland (3) are respectively provided with a plurality of fifth threaded holes (13) and sixth threaded holes (14) in the circumferential direction, the fifth threaded holes (13) and the sixth threaded holes (14) are able to correspond to each other, and the gland (3) and the sealing seat (2) are connected by a third bolt (36).

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