Combined type reaction kettle shaft sealing device

Abstract

The invention provides a combined type reaction kettle shaft sealing device. The combined type reaction kettle shaft sealing device comprises a first sealing support connected to the surface of a reaction kettle cover body; the first positioning assembly is arranged in the first sealing support, and the rotating shaft is in running fit with the first positioning assembly; the at least one first elastic sealing ring is arranged in the first sealing support and is in close contact with the rotating shaft; the second sealing support is connected to the bottom surface of the reaction kettle cover body; the second positioning assembly is arranged in the second sealing support, and the rotating shaft is in running fit with the second positioning assembly; and the second elastic sealing ring is arranged in the second sealing support and is in close contact with the rotating shaft. According to the scheme, the rotating shaft is elastically sealed through the first elastic sealing ring and the second elastic sealing ring, abrasion is small, and the sealing effect can be kept for a long time; the rotating shaft is axially and radially positioned through the first positioning assembly and the second positioning assembly, the sealing effect can be guaranteed, and sealing failure is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of shaft sealing, in particular to a combined reaction kettle shaft sealing device. Background Art

[0002] As a reaction equipment, the reactor is widely used in chemical, pharmaceutical, electronic semiconductor and photovoltaic cell fields. Its structure is mainly composed of a reactor body, a transmission device, a stirring device, a heating device, a cooling device and a sealing device. The sealing device of the reactor directly affects the reaction of the slurry in the reactor. The slurry reaction in some reactors requires high pressure and high reaction temperature, and the slurry is highly volatile. The sealing device needs to overcome the above various environments to ensure that the sealing performance meets the requirements during use.

[0003] At present, the main sealing methods used for reactors are packing seals and mechanical seals. Both packing seals and mechanical seals need to be regularly adjusted and maintained by professionals. In addition, the axial and radial positioning of the rotating shaft is not performed. When the agitator load in the reactor is large, or the structural accuracy is insufficient, causing the axial or radial movement of the rotating shaft, it is easy to cause periodic unbalanced loading of the seal, affecting the sealing effect, and easily accelerating the failure of the sealing mechanism. Summary of the invention

[0004] The present invention provides a combined reactor shaft sealing device, which seals a rotating shaft through at least one first elastic sealing ring and at least one second elastic sealing ring, has good sealing effect, and uses elastic seals with little wear, and can maintain the sealing effect for a long time; the rotating shaft is axially and radially positioned through a first positioning component and a second positioning component, and the rotating shaft rotates stably, thereby ensuring the sealing effect and avoiding sealing failure.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A combined reactor shaft sealing device, comprising:

[0007] A first sealing body connected to the surface of the reactor cover;

[0008] The first sealing body comprises:

[0009] A first sealing support connected to the surface of the reactor cover, wherein the upper end of the rotating shaft passes through the first sealing support;

[0010] A first positioning assembly disposed inside the first sealing support and used for axially and radially positioning the rotating shaft, the rotating shaft passes through the first positioning assembly, and the rotating shaft and the first positioning assembly are rotatably matched;

[0011] At least one first elastic sealing ring is arranged inside the first sealing support, the rotating shaft passes through the first elastic sealing ring, and the first elastic sealing ring is in close contact with the rotating shaft;

[0012] A second sealing body connected to the bottom surface of the reactor cover;

[0013] The second sealing body comprises:

[0014] A second sealing support connected to the bottom surface of the reactor cover, wherein the bottom end of the rotating shaft passes through the second sealing support;

[0015] A second positioning assembly disposed inside the second sealing support and used for radially positioning the rotating shaft, the rotating shaft passes through the second positioning assembly, and the rotating shaft and the second positioning assembly are rotatably matched;

[0016] At least one second elastic sealing ring is arranged inside the second sealing support, the rotating shaft passes through the second elastic sealing ring, and the second elastic sealing ring is in close contact with the rotating shaft.

[0017] Optionally, the first sealing support includes:

[0018] a first shell;

[0019] A first cover body connected to the upper end of the first shell;

[0020] a support ring formed at the inner bottom of the first shell;

[0021] A first flange ring formed on the outer bottom of the first shell, wherein the first flange ring is connected to the reactor cover;

[0022] The upper end of the rotating shaft passes through the supporting ring, the inner cavity of the first shell and the first cover body in sequence.

[0023] Optionally, the first positioning component includes:

[0024] A shaft sleeve is arranged outside the rotating shaft, the shaft sleeve is located in the inner cavity of the first shell, and the upper end surface and the bottom end surface of the shaft sleeve are both formed with an annular boss;

[0025] A first bearing and a second bearing are fixedly arranged in the inner cavity of the first housing, the outer rings of the first bearing and the second bearing are in close contact with the inner wall of the inner cavity of the first housing, the rotating shaft is in close contact with the inner rings of the first bearing and the second bearing, and the inner rings of the first bearing and the second bearing are respectively in contact with two annular bosses of the sleeve;

[0026] A first annular positioning member abutting against the first cover body and the outer ring of the first bearing;

[0027] a second annular positioning member abutting against the outer ring of the second bearing and the support ring;

[0028] The rotating shaft passes through the first annular positioning member and the second annular positioning member.

[0029] Optionally, the first elastic sealing ring includes:

[0030] A first upper elastic sealing ring is arranged inside the cavity formed by the first annular positioning member and the first cover body, wherein the outer wall and the inner wall of the first upper elastic sealing ring are in close contact with the inner wall of the inner cavity of the first annular positioning member and the outer circumferential surface of the rotating shaft respectively;

[0031] A first bottom elastic sealing ring is arranged inside the cavity formed by the second annular positioning member and the supporting ring, and the outer wall and inner wall of the first bottom elastic sealing ring are in close contact with the inner wall of the inner cavity of the second annular positioning member and the outer circumferential surface of the rotating shaft respectively.

[0032] Optionally, the second sealing support includes:

[0033] A second shell, wherein an annular portion is formed inside the second shell, and the annular portion divides the inner cavity of the second shell into a first cavity, a second cavity, and a third cavity from top to bottom;

[0034] A second cover connected to the bottom end of the second shell;

[0035] A second flange ring is formed on the upper outer portion of the second shell, and the second flange ring is connected to the bottom surface of the reactor cover.

[0036] Optionally, the second positioning component includes:

[0037] A third bearing is disposed inside the first cavity, wherein an outer ring of the third bearing is in close contact with an inner wall of the first cavity;

[0038] a fourth bearing disposed inside the third cavity, wherein an outer ring of the fourth bearing is in close contact with an inner wall of the third cavity;

[0039] The inner rings of the third bearing and the fourth bearing are in close contact with the rotating shaft;

[0040] A third annular positioning member is arranged inside the third cavity, the upper end surface and the bottom end surface of the third annular positioning member are respectively in contact with the outer ring of the fourth bearing and the second cover body, and the rotating shaft passes through the third annular positioning member.

[0041] Optionally, the second positioning component further includes:

[0042] A retaining ring, wherein a plurality of retaining rings are provided, and the plurality of retaining rings are respectively arranged between the third bearing and the reactor cover, between the third bearing and the annular portion, and between the annular portion and the fourth bearing; the rotating shaft passes through the retaining ring, and a second convex ring is formed on the surface of the retaining ring, and the second convex ring abuts against the outer ring of the third bearing or the outer ring of the fourth bearing.

[0043] Optionally, the second elastic sealing ring includes:

[0044] A second upper elastic sealing ring is arranged inside the second cavity, wherein the outer wall and the inner wall of the second upper elastic sealing ring are in close contact with the inner wall of the second cavity and the outer circumferential surface of the rotating shaft respectively;

[0045] A second bottom elastic sealing ring is arranged inside the cavity formed by the third annular positioning member and the second cover body, and the outer wall and inner wall of the second bottom elastic sealing ring are in close contact with the inner wall of the inner cavity of the third annular positioning member and the outer circumferential surface of the rotating shaft respectively.

[0046] Optionally, the first annular positioning member, the second annular positioning member and the third annular positioning member each include:

[0047] Positioning ring;

[0048] a limiting ring formed inside the positioning ring, the limiting ring abutting against the first upper elastic sealing ring, the first bottom elastic sealing ring or the second bottom elastic sealing ring;

[0049] A first convex ring is formed on the outer side of the positioning ring, the first convex ring protrudes from the end surface of the positioning ring, and the first convex ring abuts against the outer ring of the first bearing, the outer ring of the second bearing or the outer ring of the fourth bearing.

[0050] Optionally, the first upper elastic sealing ring, the first bottom elastic sealing ring, the second upper elastic sealing ring and the second bottom elastic sealing ring all include:

[0051] At least one elastic sealing ring, the outer wall of which is in close contact with the inner wall of the positioning ring or the inner wall of the second cavity;

[0052] An annular lip formed on the inner wall of the elastic sealing ring, wherein the lip is in close contact with the outer circumferential surface of the rotating shaft;

[0053] An annular buffer groove is formed on the surface of the elastic sealing ring.

[0054] The above solution of the present invention includes at least the following beneficial effects:

[0055] The above scheme of the present invention seals the rotating shaft through at least one first elastic sealing ring and at least one second elastic sealing ring, has good sealing effect, and uses elastic sealing with little wear, and can maintain the sealing effect for a long time; the rotating shaft is axially and radially positioned by the first positioning assembly and the second positioning assembly, and the rotating shaft rotates stably, ensuring the sealing effect while avoiding sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 is a schematic structural diagram of a combined reactor shaft sealing device provided by an embodiment of the present invention;

[0057] Figure 2 is a front cross-sectional view of a first sealing assembly in a combined reactor shaft sealing device provided by an embodiment of the present invention;

[0058] Figure 3 is a front cross-sectional view of a second sealing assembly in a combined reactor shaft sealing device provided by an embodiment of the present invention;

[0059] Figure 4 It is a structural schematic diagram of a second shell in a combined reactor shaft sealing device provided by an embodiment of the present invention;

[0060] Figure 5 It is a structural schematic diagram of a positioning ring in a combined reactor shaft sealing device provided by an embodiment of the present invention;

[0061] Figure 6 It is a schematic structural diagram of an elastic sealing ring in a combined reactor shaft sealing device provided by an embodiment of the present invention;

[0062] Figure 7 It is a schematic structural diagram of a retaining ring in a combined reactor shaft sealing device provided by an embodiment of the present invention;

[0063] Figure 8 It is a schematic structural diagram of a shaft sleeve in a combined reactor shaft sealing device provided in an embodiment of the present invention.

[0064] The following are the descriptions of the reference numerals:

[0065] 1. first sealing support; 11. first housing; 12. first cover; 13. first flange ring; 14. support ring; 2. second sealing support; 21. second housing; 22. second flange ring; 23. second cover; 24. annular portion; 25. first cavity; 26. second cavity; 27. third cavity; 3. rotating shaft; 4. reactor cover; 51. first annular positioning member; 52. first bearing; 53. bushing; 531. annular boss; 5 4. Second bearing; 55. Second annular positioning member; 61. First upper elastic sealing ring; 62. First bottom elastic sealing ring; 63. Second upper elastic sealing ring; 64. Second bottom elastic sealing ring; 71. Third bearing; 72. Fourth bearing; 73. Third annular positioning member; 74. Retaining ring; 741. Second convex ring; 8. Positioning ring; 81. Limiting ring; 82. First convex ring; 9. Elastic sealing ring; 91. Lip; 92. Buffer groove. DETAILED DESCRIPTION

[0066] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0067] like Figure 1-Figure 8 As shown, an embodiment of the present invention provides a combined reactor shaft sealing device, comprising:

[0068] A first sealing body connected to the surface of the reactor cover 4;

[0069] The first sealing body comprises:

[0070] A first sealing support 1 connected to the surface of the reactor cover 4, and the upper end of the rotating shaft 3 passes through the first sealing support 1;

[0071] A first positioning assembly disposed inside the first sealing support 1 for axially and radially positioning the rotating shaft 3, the rotating shaft 3 passes through the first positioning assembly, and the rotating shaft 3 is rotatably matched with the first positioning assembly;

[0072] At least one first elastic sealing ring is arranged inside the first sealing support 1, the rotating shaft 3 passes through the first elastic sealing ring, and the first elastic sealing ring is in close contact with the rotating shaft 3;

[0073] A second sealing body connected to the bottom surface of the reactor cover 4;

[0074] The second sealing body comprises:

[0075] A second sealing support 2 connected to the bottom surface of the reactor cover 4, and the bottom end of the rotating shaft 3 passes through the second sealing support 2;

[0076] A second positioning assembly is disposed inside the second sealing support 2 and is used for radially positioning the rotating shaft 3. The rotating shaft 3 passes through the second positioning assembly, and the rotating shaft 3 is rotationally matched with the second positioning assembly.

[0077] At least one second elastic sealing ring is arranged inside the second sealing support 2 , the rotating shaft 3 passes through the second elastic sealing ring, and the second elastic sealing ring is in close contact with the rotating shaft 3 .

[0078] In this embodiment, during the rotation of the rotating shaft 3, multiple elastic seals are performed on the rotating shaft 3 by at least one first elastic sealing ring and at least one second elastic sealing ring, and the sealing effect is good; due to the use of elastic sealing, the wear of the first elastic sealing ring and the second elastic sealing ring is small, and under the action of elasticity, the first elastic sealing ring and the second elastic sealing ring can be in close contact with the rotating shaft 3 for a long time, and the sealing effect can be maintained for a long time, without regular manual intervention, ensuring smooth production, and helping to reduce maintenance costs;

[0079] During the high-speed rotation of the rotating shaft 3, the first elastic sealing ring and the second elastic sealing ring generate little heat, which ensures the sealing effect without affecting the sealing effect due to high temperature, thereby eliminating the need to use other cooling devices, which helps reduce equipment costs;

[0080] The rotating shaft 3 is positioned axially and radially by the first positioning component, and is positioned radially by the second positioning component. When the rotating shaft 3 has an axial or radial load, the rotating shaft 3 can be ensured to rotate stably and the axial or radial movement of the rotating shaft 3 can be avoided, thereby preventing the movement of the rotating shaft 3 from affecting the sealing effect of the first elastic sealing ring and the second elastic sealing ring and accelerating the failure of the first elastic sealing ring and the second elastic sealing ring.

[0081] like Figure 2 As shown, in an optional embodiment of the present invention, the first sealing support 1 includes:

[0082] A first housing 11;

[0083] A first cover 12 connected to the upper end of the first shell 11;

[0084] A support ring 14 formed at the bottom of the first housing 11;

[0085] A first flange ring 13 formed on the outer bottom of the first shell 11, the first flange ring 13 is connected to the reactor cover 4;

[0086] The upper end of the rotating shaft 3 passes through the supporting ring 14 , the inner cavity of the first shell 11 and the first cover 12 in sequence.

[0087] In this embodiment, the first flange ring 13 facilitates the disassembly and assembly of the first shell 11 and the reactor cover 4, and the first cover 12 is detachably connected to the first shell 11, so that the first sealing support 1 can be disassembled, thereby facilitating the maintenance and replacement of the first positioning component and at least one first elastic sealing ring inside, thereby ensuring the axial and radial positioning effects of the rotating shaft 3, as well as the sealing effect;

[0088] In this embodiment, a sealing ring is provided between the first flange ring 13 and the reactor cover 4 to achieve a sealed connection between the first flange ring 13 and the reactor cover 4 .

[0089] like Figure 2 As shown, in an optional embodiment of the present invention, the first positioning component includes:

[0090] A shaft sleeve 53 is arranged outside the rotating shaft 3, and the shaft sleeve 53 is located in the inner cavity of the first housing 11. The upper end surface and the bottom end surface of the shaft sleeve 53 are both formed with an annular boss 531;

[0091] The first bearing 52 and the second bearing 54 are fixedly arranged in the inner cavity of the first housing 11, the outer rings of the first bearing 52 and the second bearing 54 are in close contact with the inner wall of the inner cavity of the first housing 11, the rotating shaft 3 is in close contact with the inner rings of the first bearing 52 and the second bearing 54, and the inner rings of the first bearing 52 and the second bearing 54 are respectively in contact with the two annular bosses 531 of the sleeve 53;

[0092] A first annular positioning member 51 abutting against the first cover 12 and the outer ring of the first bearing 52;

[0093] A second annular positioning member 55 abutting against the outer ring of the second bearing 54 and the support ring 14;

[0094] The rotating shaft 3 passes through the first annular positioning member 51 and the second annular positioning member 55 .

[0095] In this embodiment, the first annular positioning member 51 cooperates with the first cover body 12 to limit the outer ring of the first bearing 52, so that the inner ring of the first bearing 52 abuts against the annular boss 531 on the upper end surface of the sleeve 53; the second annular positioning member 55 cooperates with the support ring 14 to limit the outer ring of the second bearing 54, so that the inner ring of the second bearing 54 abuts against the annular boss 531 on the bottom end surface of the sleeve 53, and the shaft 3 is axially positioned by the first bearing 52, the sleeve 53 and the second bearing 54 to prevent the shaft 3 from moving along its axial direction;

[0096] At the same time, the outer ring of the first bearing 52 is in close contact with the inner wall of the inner cavity of the first housing 11, and the outer ring of the second bearing 54 is in close contact with the inner wall of the inner cavity of the first housing 11. The first bearing 52 and the second bearing 54 are used to radially position the shaft 3 to prevent the shaft 3 from moving in its radial direction.

[0097] The first bearing 52 and the second bearing 54 are used to position the rotating shaft 3 axially and radially, thereby preventing the rotating shaft 3 from moving in the axial and radial directions and ensuring the rotating shaft 3 to rotate smoothly under the conditions of axial load and radial load.

[0098] In this embodiment, the rotating shaft 3 is positioned by a bearing. In a specific application, other components having an inner ring and an outer ring that can rotate relatively can be used to replace the first bearing 52 and the second bearing 54, and cooperate with the sleeve 53 to position the rotating shaft 3 axially and radially.

[0099] In this embodiment, the first bearing 52 and the second bearing 54 may be made of non-metallic materials to prevent the slurry from being contaminated by metal;

[0100] In this embodiment, the outer diameter of the annular boss 531 is equal to the outer diameter of the inner rings of the first bearing 52 and the second bearing 54 .

[0101] like Figure 2 As shown, in an optional embodiment of the present invention, the first elastic sealing ring includes:

[0102] A first upper elastic sealing ring 61 is disposed inside the cavity formed by the first annular positioning member 51 and the first cover body 12, and the outer wall and the inner wall of the first upper elastic sealing ring 61 are in close contact with the inner wall of the inner cavity of the first annular positioning member 51 and the outer circumferential surface of the rotating shaft 3 respectively;

[0103] The first bottom elastic sealing ring 62 is arranged inside the cavity formed by the second annular positioning member 55 and the support ring 14 , and the outer wall and inner wall of the first bottom elastic sealing ring 62 are in close contact with the inner wall of the inner cavity of the second annular positioning member 55 and the outer circumferential surface of the rotating shaft 3 respectively.

[0104] In this embodiment, the first upper elastic sealing ring 61 is limited by the cooperation of the first cover body 12 and the first annular positioning member 51, so that the outer wall of the first upper elastic sealing ring 61 is in close contact with the inner wall of the inner cavity of the first annular positioning member 51, and the inner wall of the first upper elastic sealing ring 61 is in close contact with the outer circumferential surface of the rotating shaft 3, thereby realizing elastic sealing of the rotating shaft 3;

[0105] The first bottom elastic sealing ring 62 is limited by the cooperation of the support ring 14 and the second annular positioning member 55, so that the outer wall of the first bottom elastic sealing ring 62 is in close contact with the inner wall of the inner cavity of the second annular positioning member 55, and the inner wall of the first bottom elastic sealing ring 62 is in close contact with the outer circumferential surface of the rotating shaft 3, thereby realizing elastic sealing of the rotating shaft 3;

[0106] The first upper elastic sealing ring 61 and the first bottom elastic sealing ring 62 perform double elastic sealing on the rotating shaft 3, and the sealing effect is good; the first upper elastic sealing ring 61 and the first bottom elastic sealing ring 62 can be in close contact with the rotating shaft 3 for a long time under the action of their own elasticity, and can maintain the sealing effect for a long time, without regular manual intervention, ensuring smooth production and helping to reduce maintenance costs; at the same time, the first upper elastic sealing ring 61 and the first bottom elastic sealing ring 62 have little wear and are not easy to generate abrasives, thereby avoiding slurry pollution;

[0107] In this embodiment, the first upper elastic sealing ring 61 and the first bottom elastic sealing ring 62 are taken as examples. The two first elastic sealing rings are used to seal the rotating shaft 3. In actual use, according to different sealing requirements, only the first upper elastic sealing ring 61 or only the first bottom elastic sealing ring 62 can be used to meet different sealing requirements.

[0108] like Figure 3 and Figure 4 As shown, in an optional embodiment of the present invention, the second sealing support 2 includes:

[0109] A second shell 21, wherein an annular portion 24 is formed inside the second shell 21, and the annular portion 24 divides the inner cavity of the second shell 21 into a first cavity 25, a second cavity 26 and a third cavity 27 from top to bottom;

[0110] A second cover 23 connected to the bottom end of the second housing 21;

[0111] A second flange ring 22 is formed on the upper outer side of the second shell 21 , and the second flange ring 22 is connected to the bottom surface of the reactor cover 4 .

[0112] In this embodiment, the second flange ring 22 facilitates the disassembly and assembly of the second shell 21 and the reactor cover 4, and the second cover 23 is detachably connected to the second shell 21, so that the second sealing support 2 can be disassembled, thereby facilitating the maintenance and replacement of the second positioning component and at least one second elastic sealing ring inside, thereby ensuring the radial positioning effect of the rotating shaft 3 and the sealing effect;

[0113] In this embodiment, a sealing ring is provided between the second flange ring 22 and the reactor cover 4 , so as to achieve sealing performance of the connection between the second flange ring 22 and the reactor cover 4 .

[0114] like Figure 3 and Figure 4 As shown, in an optional embodiment of the present invention, the second positioning component includes:

[0115] A third bearing 71 is disposed inside the first cavity 25 , and an outer ring of the third bearing 71 is in close contact with an inner wall of the first cavity 25 ;

[0116] A fourth bearing 72 is disposed inside the third cavity 27 , and an outer ring of the fourth bearing 72 is in close contact with an inner wall of the third cavity 27 ;

[0117] The inner rings of the third bearing 71 and the fourth bearing 72 are in close contact with the rotating shaft 3;

[0118] The third annular positioning member 73 is disposed inside the third cavity 27 , and the upper end surface and the bottom end surface of the third annular positioning member 73 are respectively in contact with the outer ring of the fourth bearing 72 and the second cover 23 , and the rotating shaft 3 passes through the third annular positioning member 73 .

[0119] In this embodiment, the third bearing 71 is limited inside the first cavity 25 by the annular portion 24 and the reactor cover 4, and the fourth bearing 72 is limited inside the third cavity 27 by the third annular positioning member 73 and the annular portion 24. The outer ring of the third bearing 71 is in close contact with the inner wall of the first cavity 25, and the outer ring of the fourth bearing 72 is in close contact with the inner wall of the third cavity 27. Thus, the third bearing 71 and the fourth bearing 72 are used to radially position the shaft 3, so as to prevent the shaft 3 from moving in the radial direction, and ensure that the shaft 3 can rotate smoothly under radial load.

[0120] In this embodiment, the shaft 3 is positioned by bearings. In specific applications, other components having an inner ring and an outer ring that can rotate relatively can be used to replace the third bearing 71 and the fourth bearing 72 to radially position the shaft 3.

[0121] In this embodiment, the third bearing 71 and the fourth bearing 72 may be made of non-metallic materials to prevent the slurry from being contaminated by metal.

[0122] like Figure 3 and Figure 7 As shown, in an optional embodiment of the present invention, the second positioning component also includes:

[0123] A retaining ring 74 is provided in plurality, and the plurality of retaining rings 74 are respectively arranged between the third bearing 71 and the reactor cover 4, between the third bearing 71 and the annular portion 24, and between the annular portion 24 and the fourth bearing 72; the rotating shaft 3 passes through the retaining ring 74, and a second convex ring 741 is formed on the surface of the retaining ring 74, and the second convex ring 741 abuts against the outer ring of the third bearing 71 or the outer ring of the fourth bearing 72.

[0124] In this embodiment, the second convex ring 741 on the retaining ring 74 abuts against the inner ring of the third bearing 71 or the inner ring of the fourth bearing 72, thereby assisting in limiting the third bearing 71 and the fourth bearing 72, and ensuring that the outer ring and the inner ring of the third bearing 71 and the fourth bearing 72 rotate smoothly relative to each other;

[0125] At the same time, the first convex ring 82 can make a space between the third bearing 71 and the fourth bearing 72 and the retaining ring 74, so that when the third bearing 71 and the fourth bearing 72 need to be removed, it is convenient for a removal tool such as a claw to enter the space and contact the inner ring of the third bearing 71 or the fourth bearing 72, and the inner ring of the third bearing 71 or the fourth bearing 72 is lifted by the removal tool such as the claw, so as to facilitate the removal of the third bearing 71 and the fourth bearing 72;

[0126] In this embodiment, the retaining ring 74 can be made of non-metallic material to prevent the slurry from being contaminated by metal.

[0127] like Figure 3 As shown, in an optional embodiment of the present invention, the second elastic sealing ring includes:

[0128] A second upper elastic sealing ring 63 is disposed inside the second cavity 26, and the outer wall and the inner wall of the second upper elastic sealing ring 63 are in close contact with the inner wall of the second cavity 26 and the outer circumferential surface of the rotating shaft 3 respectively;

[0129] The second bottom elastic sealing ring 64 is arranged inside the cavity formed by the third annular positioning member 73 and the second cover body 23 , and the outer wall and inner wall of the second bottom elastic sealing ring 64 are in close contact with the inner wall of the inner cavity of the third annular positioning member 73 and the outer circumferential surface of the rotating shaft 3 respectively.

[0130] In this embodiment, the second upper elastic sealing ring 63 is limited inside the second cavity 26, and the outer wall of the second upper elastic sealing ring 63 is in close contact with the inner wall of the second cavity 26, and the inner wall of the second upper elastic sealing ring 63 is in close contact with the outer circumferential surface of the rotating shaft 3, so that the rotating shaft 3 can be elastically sealed by the second upper elastic sealing ring 63;

[0131] The second bottom elastic sealing ring 64 is limited by the second cover body 23 in cooperation with the third annular positioning member 73, and the outer wall of the second bottom elastic sealing ring 64 is in close contact with the inner wall of the third annular positioning member 73, and the inner wall of the second bottom elastic sealing ring 64 is in close contact with the outer circumferential surface of the rotating shaft 3, and the rotating shaft 3 is elastically sealed by the second bottom elastic sealing ring 64;

[0132] The second upper elastic sealing ring 63 and the second bottom elastic sealing ring 64 perform double elastic sealing on the rotating shaft 3, and the sealing effect is good; the second upper elastic sealing ring 63 and the second bottom elastic sealing ring 64 can be in close contact with the rotating shaft 3 for a long time under the action of their own elasticity, and can maintain the sealing effect for a long time, without regular manual intervention, ensuring smooth production and helping to reduce maintenance costs; at the same time, the second upper elastic sealing ring 63 and the second bottom elastic sealing ring 64 have little wear and are not easy to generate abrasives, thereby avoiding slurry pollution;

[0133] In this embodiment, the second upper elastic sealing ring 63 and the second bottom elastic sealing ring 64 are used as examples to seal the rotating shaft 3. In actual use, according to different sealing requirements, only the second upper elastic sealing ring 63 or only the second bottom elastic sealing ring 64 can be used to meet different sealing requirements.

[0134] like Figure 5 As shown, in an optional embodiment of the present invention, the first annular positioning member 51, the second annular positioning member 55 and the third annular positioning member 73 all include:

[0135] Positioning ring 8;

[0136] A limiting ring 81 formed inside the positioning ring 8, the limiting ring 81 abuts against the first upper elastic sealing ring 61, the first bottom elastic sealing ring 62 or the second bottom elastic sealing ring 64;

[0137] The first convex ring 82 is formed on the outer side of the positioning ring 8 , protrudes from the end surface of the positioning ring 8 , and abuts against the outer ring of the first bearing 52 , the outer ring of the second bearing 54 , or the outer ring of the fourth bearing 72 .

[0138] In this embodiment, the first upper elastic sealing ring 61, the first bottom elastic sealing ring 62 or the second bottom elastic sealing ring 64 can be limited inside the positioning ring 8 by the limiting ring 81, so as to ensure that the outer wall of the first upper elastic sealing ring 61, the first bottom elastic sealing ring 62 or the second bottom elastic sealing ring 64 is in close contact with the inner wall of the positioning ring 8, thereby ensuring the sealing effect of the first upper elastic sealing ring 61, the first bottom elastic sealing ring 62 or the second bottom elastic sealing ring 64.

[0139] The first convex ring 82 abuts against the outer ring of the first bearing 52, the outer ring of the second bearing 54 or the outer ring of the fourth bearing 72, thereby assisting in limiting the first bearing 52, the second bearing 54 or the fourth bearing 72 and ensuring that the outer edge and the inner ring of the first bearing 52, the second bearing 54 or the fourth bearing 72 rotate smoothly relative to each other;

[0140] At the same time, the first convex ring 82 can form a space between the inner ring of the first bearing 52, the second bearing 54 or the fourth bearing 72 and the positioning ring 8, so that when the first bearing 52, the second bearing 54 or the fourth bearing 72 needs to be removed, it is convenient for a removal tool such as a claw to enter the space and contact the inner ring of the first bearing 52, the second bearing 54 or the fourth bearing 72, and the inner ring of the first bearing 52, the second bearing 54 or the fourth bearing 72 is lifted by the removal tool such as the claw, so as to facilitate the removal of the first bearing 52, the second bearing 54 or the fourth bearing 72 and the positioning ring 8;

[0141] In this embodiment, the positioning ring 8 can be made of non-metallic material to prevent the slurry from being contaminated by metal.

[0142] like Figure 6 As shown, in an optional embodiment of the present invention, the first upper elastic sealing ring 61, the first bottom elastic sealing ring 62, the second upper elastic sealing ring 63 and the second bottom elastic sealing ring 64 all include:

[0143] At least one elastic sealing ring 9, the outer wall of the elastic sealing ring 9 is in close contact with the inner wall of the positioning ring 8 or the inner wall of the second cavity 26;

[0144] An annular lip 91 formed on the inner wall of the elastic sealing ring 9, the lip 91 is in close contact with the outer circumferential surface of the rotating shaft 3;

[0145] An annular buffer groove 92 is formed on the surface of the elastic sealing ring 9.

[0146] In this embodiment, the elastic sealing ring 9 and the elastic force of the lip 91 can make the lip 91 fully contact with the rotating shaft 3 for a long time, and the sealing effect is good;

[0147] By providing the buffer groove 92, the elastic deformation range of the elastic sealing ring 9 and the lip 91 can be increased, ensuring that the lip 91 is in full contact with the rotating shaft 3, which helps to improve the sealing effect;

[0148] In this embodiment, the first upper elastic sealing ring 61, the first bottom elastic sealing ring 62, the second upper elastic sealing ring 63 and the second bottom elastic sealing ring 64 each include two elastic sealing rings 9. In actual application, the number of elastic sealing rings 9 can be adjusted according to sealing requirements.

[0149] The combined reactor shaft sealing device provided by the above embodiment of the present invention elastically seals the rotating shaft 3 through the first sealing ring composed of the first upper elastic sealing ring 61 and the first bottom elastic sealing ring 62; and elastically seals the rotating shaft 3 through the second sealing ring composed of the second upper elastic sealing ring 63 and the second bottom elastic sealing ring 64; multiple elastic seals can be performed on the rotating shaft 3, and the sealing effect is good; due to the use of elastic sealing, the wear of the first elastic sealing ring and the second elastic sealing ring is small, and under the action of elasticity, the first elastic sealing ring and the second elastic sealing ring can be in close contact with the rotating shaft 3 for a long time, and the sealing effect can be maintained for a long time, and there is no need for regular maintenance. Manual intervention ensures smooth production and helps reduce maintenance costs; during the high-speed rotation of the shaft 3, the first elastic sealing ring and the second elastic sealing ring generate little heat, and while ensuring the sealing effect, the sealing effect will not be affected by high temperature, so there is no need to use other additional cooling devices, which helps reduce equipment costs; the first upper elastic sealing ring 61, the first bottom elastic sealing ring 62, the second upper elastic sealing ring 63 and the second bottom elastic sealing ring 64 are all elastic sealing rings 9. By providing a buffer groove 92, the elastic deformation range of the elastic sealing ring 9 and the lip 91 can be increased, ensuring that the lip 91 is in full contact with the shaft 3, which helps improve the sealing effect;

[0150] The first annular positioning member 51, the first bearing 52, the sleeve 53, the second bearing 54 and the second annular positioning member 55 form a first positioning assembly, which can position the rotating shaft 3 axially and radially; the third bearing 71, the fourth bearing 72 and the third annular positioning member 73 form a second positioning assembly, which can position the rotating shaft 3 radially; when the rotating shaft 3 has an axial or radial load, the rotating shaft 3 can be ensured to rotate stably and avoid the rotating shaft 3 from moving in the axial or radial direction, thereby preventing the moving of the rotating shaft 3 from affecting the sealing effect of the first elastic sealing ring and the second elastic sealing ring and accelerating the failure of the first elastic sealing ring and the second elastic sealing ring;

[0151] When in use, one of the first sealing body and the second sealing body can be selected according to the use environment and sealing requirements. If the axial and radial loads transmitted to the rotating shaft 3 during operation are large and the sealing requirements are high, the first sealing body and the second sealing body can be installed at the same time; if the axial and radial loads on the rotating shaft 3 are small and the sealing requirements are not high, only the first sealing body can be installed; if the axial load on the rotating shaft 3 can be ignored and there is only radial load, only the second sealing body can be installed; in some occasions where both axial and radial loads can be ignored and the sealing is not high, the retaining ring 74 and other components inside the first sealing body or the second sealing body can be removed, and only the elastic sealing ring 9 can be installed according to the sealing requirements; through the above adjustment, different use requirements can be met;

[0152] In specific applications, each component in the first positioning assembly and the second positioning assembly can be made of non-metallic materials to avoid metal contamination;

[0153] The overall structure is simple and can be realized with currently common standard parts. The maintenance cycle is long and the operation can be completed without the need for professional personnel.

[0154] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A combined reactor shaft sealing device, characterized in that: include: A first sealing body connected to the surface of the reactor cover (4); The first sealing body comprises: A first sealing support (1) connected to the surface of the reactor cover (4), wherein the upper end of the rotating shaft (3) passes through the first sealing support (1); a first positioning assembly disposed inside the first sealing support (1) and used for axially and radially positioning the rotating shaft (3); the rotating shaft (3) passes through the first positioning assembly, and the rotating shaft (3) is rotatably matched with the first positioning assembly; At least one first elastic sealing ring is arranged inside the first sealing support (1), the rotating shaft (3) passes through the first elastic sealing ring, and the first elastic sealing ring is in close contact with the rotating shaft (3); A second sealing body connected to the bottom surface of the reactor cover (4); The second sealing body comprises: A second sealing support (2) connected to the bottom surface of the reactor cover (4), wherein the bottom end of the rotating shaft (3) passes through the second sealing support (2); a second positioning assembly disposed inside the second sealing support (2) and used for radially positioning the rotating shaft (3); the rotating shaft (3) passes through the second positioning assembly, and the rotating shaft (3) and the second positioning assembly are rotatably matched; At least one second elastic sealing ring is arranged inside the second sealing support (2), the rotating shaft (3) passes through the second elastic sealing ring, and the second elastic sealing ring is in close contact with the rotating shaft (3).

2. The combined reactor shaft sealing device according to claim 1, characterized in that: The first sealing support (1) comprises: A first housing (11); A first cover (12) connected to the upper end of the first shell (11); a support ring (14) formed on the inner bottom of the first shell (11); a first flange ring (13) formed on the outer bottom of the first shell (11), wherein the first flange ring (13) is connected to the reactor cover (4); The upper end of the rotating shaft (3) passes through the supporting ring (14), the inner cavity of the first shell (11) and the first cover (12) in sequence.

3. The combined reactor shaft sealing device according to claim 2, characterized in that: The first positioning component comprises: A shaft sleeve (53) is arranged on the outside of the rotating shaft (3), the shaft sleeve (53) is located in the inner cavity of the first shell (11), and the upper end surface and the bottom end surface of the shaft sleeve (53) are both formed with an annular boss (531); A first bearing (52) and a second bearing (54) are fixedly arranged in the inner cavity of the first housing (11), the outer rings of the first bearing (52) and the second bearing (54) are in close contact with the inner wall of the inner cavity of the first housing (11), the rotating shaft (3) is in close contact with the inner rings of the first bearing (52) and the second bearing (54), and the inner rings of the first bearing (52) and the second bearing (54) are respectively in contact with two annular bosses (531) of the shaft sleeve (53); a first annular positioning member (51) abutting against the first cover body (12) and the outer ring of the first bearing (52); a second annular positioning member (55) abutting against the outer ring of the second bearing (54) and the support ring (14); The rotating shaft (3) passes through the first annular positioning member (51) and the second annular positioning member (55).

4. The combined reactor shaft sealing device according to claim 3, characterized in that: The first elastic sealing ring comprises: a first upper elastic sealing ring (61) disposed inside a cavity formed by the first annular positioning member (51) and the first cover body (12), wherein the outer wall and the inner wall of the first upper elastic sealing ring (61) are in close contact with the inner wall of the inner cavity of the first annular positioning member (51) and the outer circumferential surface of the rotating shaft (3), respectively; A first bottom elastic sealing ring (62) is arranged inside the cavity formed by the second annular positioning member (55) and the supporting ring (14), and the outer wall and inner wall of the first bottom elastic sealing ring (62) are respectively in close contact with the inner wall of the inner cavity of the second annular positioning member (55) and the outer circumferential surface of the rotating shaft (3).

5. The combined reactor shaft sealing device according to claim 1, characterized in that: The second sealing support (2) comprises: A second shell (21), wherein an annular portion (24) is formed inside the second shell (21), and the annular portion (24) divides the inner cavity of the second shell (21) into a first cavity (25), a second cavity (26) and a third cavity (27) from top to bottom; A second cover (23) connected to the bottom end of the second shell (21); A second flange ring (22) is formed on the upper outer portion of the second shell (21), and the second flange ring (22) is connected to the bottom surface of the reactor cover (4).

6. The combined reactor shaft sealing device according to claim 5, characterized in that: The second positioning component includes: a third bearing (71) disposed inside the first cavity (25), wherein an outer ring of the third bearing (71) is in close contact with an inner wall of the first cavity (25); a fourth bearing (72) disposed inside the third cavity (27), wherein an outer ring of the fourth bearing (72) is in close contact with an inner wall of the third cavity (27); The inner rings of the third bearing (71) and the fourth bearing (72) are in close contact with the rotating shaft (3); A third annular positioning member (73) is arranged inside the third cavity (27), and the upper end surface and the bottom end surface of the third annular positioning member (73) are respectively in contact with the outer ring of the fourth bearing (72) and the second cover body (23), and the rotating shaft (3) passes through the third annular positioning member (73).

7. The combined reactor shaft sealing device according to claim 6, characterized in that: The second positioning component also includes: A retaining ring (74), wherein a plurality of retaining rings (74) are provided, and the plurality of retaining rings (74) are respectively provided between the third bearing (71) and the reactor cover (4), between the third bearing (71) and the annular portion (24), and between the annular portion (24) and the fourth bearing (72); the rotating shaft (3) passes through the retaining ring (74), and a second convex ring (741) is formed on the surface of the retaining ring (74), and the second convex ring (741) abuts against the outer ring of the third bearing (71) or the outer ring of the fourth bearing (72).

8. The combined reactor shaft sealing device according to claim 6, characterized in that: The second elastic sealing ring comprises: a second upper elastic sealing ring (63) disposed inside the second cavity (26), wherein the outer wall and the inner wall of the second upper elastic sealing ring (63) are in close contact with the inner wall of the second cavity (26) and the outer circumferential surface of the rotating shaft (3) respectively; A second bottom elastic sealing ring (64) is arranged inside the cavity formed by the third annular positioning member (73) and the second cover body (23), and the outer wall and inner wall of the second bottom elastic sealing ring (64) are respectively in close contact with the inner wall of the inner cavity of the third annular positioning member (73) and the outer cylindrical surface of the rotating shaft (3).

9. The combined reactor shaft sealing device according to claim 4 or 8, characterized in that: The first annular positioning member (51), the second annular positioning member (55) and the third annular positioning member (73) each include: Positioning ring (8); a limiting ring (81) formed inside the positioning ring (8), wherein the limiting ring (81) abuts against the first upper elastic sealing ring (61), the first bottom elastic sealing ring (62) or the second bottom elastic sealing ring (64); A first convex ring (82) is formed on the outer side of the positioning ring (8), the first convex ring (82) protrudes from the end face of the positioning ring (8), and the first convex ring (82) abuts against the outer ring of the first bearing (52), the outer ring of the second bearing (54) or the outer ring of the fourth bearing (72).

10. The combined reactor shaft sealing device according to claim 9, characterized in that: The first upper elastic sealing ring (61), the first bottom elastic sealing ring (62), the second upper elastic sealing ring (63) and the second bottom elastic sealing ring (64) all include: at least one elastic sealing ring (9), the outer wall of the elastic sealing ring (9) being in close contact with the inner wall of the positioning ring (8) or the inner wall of the second cavity (26); An annular lip (91) formed on the inner wall of the elastic sealing ring (9), wherein the lip (91) is in close contact with the outer circumferential surface of the rotating shaft (3); An annular buffer groove (92) is formed on the surface of the elastic sealing ring (9).

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