Mechanical sealing structure for high-temperature kettle

Abstract

The utility model discloses a mechanical sealing structure for a high-temperature kettle, which relates to the technical field of mechanical sealing and comprises a main shaft and a mechanical sealing component mounted on the main shaft. A cooling assembly is further installed on the medium side of the mechanical sealing assembly, and the main shaft is sleeved with the cooling assembly. The cooling assembly is additionally arranged on the side, close to the interior of equipment, of the mechanical sealing assembly, the cooling assembly can reduce heat transfer of the main shaft as much as possible, heat in the equipment can be effectively isolated, and therefore the service life of the mechanical sealing assembly is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal structure for a high-temperature kettle. Background Art

[0002] In most industries such as petroleum, chemical, papermaking, and electric power, more than 80% of fluid conveying equipment and mixing equipment use mechanical seals. The adaptability of mechanical seals and how to extend their service life have always been the research and development direction in the field of mechanical seals. At the same time, for mechanical seals to work properly, they also need reasonable design of each component and reasonable material selection to meet the use requirements.

[0003] Under normal temperature conditions, mechanical seals only need to provide a sufficient amount of sealing liquid to meet the cooling and lubrication needs of the mechanical seals. However, in high temperature environments, the heat conducted from the fluid conveying equipment or mixing equipment is not enough to cool and lubricate the mechanical seals with just the sealing liquid.

[0004] Therefore, there is an urgent need for a mechanical sealing structure that can meet the use requirements of high-temperature kettles. Utility Model Content

[0005] The utility model aims to provide a mechanical seal structure for a high-temperature kettle. By adding a cooling component on the side of the mechanical seal component close to the inside of the equipment, the cooling component can not only reduce the heat transfer of the main shaft as much as possible, but also effectively isolate the heat inside the equipment, thereby ensuring the service life of the mechanical seal component.

[0006] To achieve the purpose of the utility model, the technical solution adopted is: a mechanical seal structure for a high-temperature kettle, including a main shaft and a mechanical seal assembly installed on the main shaft; a cooling assembly is also installed on the medium side of the mechanical seal assembly, and the cooling assembly is sleeved on the main shaft.

[0007] Furthermore, the cooling assembly includes an annular base and a cap, the cap is arranged on the annular base, and a cooling chamber is formed inside the cap.

[0008] Furthermore, the cooling assembly also includes a drainage sleeve fixed on the annular base, the drainage sleeve is arranged on the main shaft, and the drainage sleeve is also provided with a drainage groove, and the drainage groove is connected to the cooling chamber.

[0009] Furthermore, the drainage groove is spiral-shaped.

[0010] Furthermore, the cooling assembly also includes an intermediate sleeve fixed on the annular base, and a water inlet chamber is provided in the intermediate sleeve. The water inlet chamber is arranged outside the drainage groove, and the water inlet chamber is communicated with the drainage groove.

[0011] Furthermore, the annular base is provided with a cooling medium inlet connected to the water inlet chamber and a cooling medium outlet connected to the cooling chamber.

[0012] Furthermore, the cooling chamber is located on a side of the annular base away from the mechanical sealing assembly.

[0013] Furthermore, the mechanical seal assembly includes an outer sleeve and an inner sleeve, the inner sleeve is sleeved on the main shaft, and the outer sleeve and the inner sleeve are coaxially installed at intervals, the outer end of the outer sleeve and the outer end of the inner sleeve are jointly installed with an outer end cover, the inner end of the outer sleeve and the inner end of the inner sleeve are jointly installed with an inner end cover, and a sealing cavity is formed between the outer sleeve and the inner sleeve; the inner wall of the inner sleeve is also provided with an annular groove connected to the sealing cavity, and the annular groove and the outer wall of the main shaft together form an isolation chamber.

[0014] Furthermore, an inner sealing ring and an outer sealing ring are installed between the outer end of the inner sleeve and the outer end of the outer sleeve, a buffer cavity is formed between the inner sealing ring and the outer sealing ring, and the buffer cavity is connected to the isolation chamber.

[0015] Furthermore, a sealing liquid inlet communicating with the sealing cavity is formed on the inner end cover, and a sealing liquid outlet communicating with the buffer cavity is formed on the outer end cover.

[0016] Furthermore, a stationary ring is installed on the inner end cover, and a rotating ring is installed on the inner end of the inner sleeve, and the rotating ring is in contact with the stationary ring.

[0017] The beneficial effects of the utility model are:

[0018] The utility model adds a cooling component on one side of the mechanical seal component close to the inside of the device. The cooling component can not only reduce the heat transfer of the main shaft as much as possible, but also effectively isolate the heat inside the device, thereby ensuring the service life of the mechanical seal component.

[0019] In the utility model, an isolation chamber is provided on the inner sleeve so that the sealing liquid entering the isolation chamber can not only cool the friction surface of the inner sleeve but also cool the main shaft, thereby reducing the heat conducted from the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings illustrate exemplary embodiments of the present invention and are used to explain the principles of the present invention together with the description. These drawings are included to provide a further understanding of the present invention, and the drawings are included in and constitute a part of this specification.

[0021] Figure 1 It is a structural diagram of a mechanical seal structure for a high-temperature kettle provided by the utility model.

[0022] Markings and corresponding parts names in the attached drawings:

[0023] 1. Mechanical seal assembly, 2. Cooling assembly, 3. Spindle;

[0024] 101, outer sleeve, 102, inner sleeve, 103, outer end cover, 104, stationary ring, 105, rotating ring, 106, inner end cover, 107, sealing chamber, 108, isolation chamber, 109, inner sealing ring, 110, outer sealing ring, 111, buffer chamber, 112, sealing liquid inlet, 113, sealing liquid outlet;

[0025] 201. annular base, 202. cap, 203. cooling chamber, 204. drainage sleeve, 205. drainage groove, 206. intermediate shaft sleeve, 207. water inlet chamber, 208. cooling medium inlet, 209. cooling medium outlet. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and implementations. It is to be understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings.

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] like Figure 1 As shown, the utility model provides a mechanical seal structure for a high-temperature autoclave, including a main shaft 3 and a mechanical seal assembly 1 installed on the main shaft 3. The mechanical seal assembly 1 forms a mechanical seal between the main shaft 3 and the equipment housing, thereby effectively preventing the substance inside the equipment housing from leaking through the gap between the equipment housing and the main shaft 3. A cooling assembly 2 is installed on the side of the mechanical seal assembly 1 close to the inside of the equipment housing. When the cooling assembly 2 is installed, the end face of the cooling assembly 2 close to the inside of the equipment housing does not exceed the inner wall of the equipment housing, so as to avoid affecting the process inside the equipment housing. When the cooling assembly 2 is installed on the mechanical seal assembly 1, the cooling assembly 2 is sleeved on the main shaft 3.

[0029] The utility model adds a cooling component 2 on the side of the mechanical seal component 1 close to the inside of the device, so that the cooling component 2 can not only isolate the heat inside the device shell from acting on the mechanical seal component 1, but also can cool the main shaft 3 while the heat inside the device shell is transferred to the mechanical seal component 1 through the main shaft 3, thereby reducing the heat transferred through the main shaft 3 as much as possible, so that the service life of the mechanical seal component 1 is guaranteed.

[0030] In the utility model, the cooling assembly 2 includes an annular base 201 and a cap 202. The annular base 201 is fixed on the cooling assembly 2, and the cap 202 is covered on the annular base 201. At this time, a cooling chamber 203 is formed inside the cap 202. The cooling chamber 203 is annular and contains a cooling medium. When the utility model is installed on the main shaft 3 of the equipment, the cooling chamber 203 is located on the side of the annular base 201 away from the mechanical seal assembly 1, and the inner end surface of the cap 202 can be flush with the inner wall of the equipment. At this time, the cooling chamber 203 surrounds the main shaft 3 on the equipment. When the heat inside the equipment is transferred to the mechanical seal assembly 1 through the main shaft 3, the cooling medium in the cooling chamber 203 exchanges heat with the heat on the main shaft 3, thereby cooling the main shaft 3 and reducing the heat transferred from the main shaft 3 to the mechanical seal assembly 1; at the same time, the cooling medium in the cooling chamber 203 can play an isolating role between the material in the equipment and the mechanical seal assembly 1, thereby preventing the heat of the material in the equipment from directly acting on the mechanical seal assembly 1.

[0031] The cooling component 2 also includes a drainage sleeve 204, the inner wall of the drainage sleeve 204 and the outer wall of the main shaft 3 are clearance-matched, so as to avoid wear on the drainage sleeve 204 while ensuring that the main shaft 3 can rotate normally; at the same time, when the drainage sleeve 204 is installed, the inner end of the drainage sleeve 204 can be flush with the inner end surface of the cap 202, and the outer end of the drainage sleeve 204 extends beyond the inner end surface of the annular base 201 toward the mechanical seal component 1. At this time, the inner end of the drainage sleeve 204 is welded to the cap 202, and the outer end of the drainage sleeve 204 is welded to the annular base 201, and the cap 202 does not need to be provided with an inner circular surface, and the inner end of the drainage sleeve 204 can be used as the inner circular surface of the cap 202, so that the structure of the cooling component 2 is simpler while ensuring the formation of the cooling chamber 203. The outer end of the drainage sleeve 204 is further provided with a drainage groove 205 , which is in communication with the cooling chamber 203 , so that the cooling medium can flow into the cooling chamber 203 through the drainage groove 205 .

[0032] By setting the drainage groove 205 on the drainage sleeve 204, when the cooling medium flows along the drainage groove 205, the cooling medium is also embraced on the outer wall of the main shaft 3, thereby increasing the length of the cooling medium embracing the main shaft 3. Since the heat will first be heat exchanged with the cooling medium in the cooling chamber 203 during the process of being transferred from the main shaft 3 to the mechanical seal assembly 1, the heat will gradually decrease, and therefore, the efficiency of heat exchange with the cooling medium gradually decreases, so that although the cooling medium flowing in the drainage groove 205 is less than the cooling medium in the cooling chamber 203, it can also ensure further cooling of the main shaft 3; at the same time, by setting the drainage groove 205, the thickness of the drainage sleeve 204 can be reduced as much as possible, so that when the cooling assembly 2 is installed, the outer end of the drainage sleeve 204 can be as close as possible to the position where the sealing medium embraces the main shaft 3 in the mechanical seal assembly 1, so that the cooling medium embraces the main shaft 3 for a longer length, and the cooling effect of the main shaft 3 is better.

[0033] The drainage groove 205 is spiral, so that the drainage groove 205 can cover the entire drainage sleeve 204 as much as possible during design, so that the cooling medium has a better cooling effect on the main shaft 3 when flowing through the drainage groove 205. Of course, in the present invention, while ensuring the heat exchange effect between the cooling medium and the main shaft 3, the drainage groove 205 can also be extended in the axial direction of the drainage sleeve 204 and then be arranged to cover the entire circumferential surface of the drainage sleeve 204.

[0034] In order to facilitate the processing of the drainage groove 205, the drainage groove 205 can be opened on the outer circumferential surface of the drainage sleeve 204. At this time, an intermediate sleeve 206 can be arranged outside the drainage sleeve 204, and the outer end of the intermediate sleeve 206 is flush with the outer end of the drainage sleeve 204, and the inner end of the intermediate sleeve 206 abuts against the outer end surface of the annular base 201 and is fixed to the annular base. In order to ensure the cooling of the main shaft 3 as much as possible, a water inlet chamber 207 can also be arranged in the intermediate sleeve 206, and the water inlet chamber 207 completely embraces the drainage groove 205 on the drainage sleeve 204, and the end of the water inlet chamber 207 close to the mechanical seal assembly 1 is connected to the drainage groove 205; at the same time, in order to facilitate the processing of the water inlet chamber 207, the water inlet chamber 207 passes through the inner end surface of the intermediate sleeve 206.

[0035] The annular base 201 is also provided with a cooling medium inlet 208 connected to the water inlet chamber 207 and a cooling medium outlet 209 connected to the cooling chamber 203. The cooling medium inlet 208 is located at one end of the water inlet chamber 207 close to the interior of the device, and the cooling medium outlet 209 is located at one end of the cooling chamber 203 away from the interior of the device, so that the cooling medium enters the water inlet chamber 207 through the cooling medium inlet 208, passes through the entire depth of the water inlet chamber 207, and then enters the drainage groove 205, and then enters the cooling chamber 203 after passing through the entire drainage groove 205, and finally is discharged from the cooling medium outlet 209, so that the heat exchange effect of the cooling medium is better.

[0036] The mechanical seal assembly 1 comprises an outer sleeve 101 and an inner sleeve 102. The inner sleeve 102 is sleeved on the main shaft 3 and cooperates with the main shaft 3 to rotate and seal. The outer sleeve 101 and the inner sleeve 102 are coaxially installed at intervals, that is, a sealing chamber 107 is formed between the inner wall of the outer sleeve 101 and the outer wall of the inner sleeve 102. The sealing chamber 107 is annular and filled with a sealing medium. The outer end of the outer sleeve 101 and the outer end of the inner sleeve 102 are jointly installed with a sealing medium. The outer end cover 103 is used to seal the outer end of the sealing chamber 107. The inner end of the outer sleeve 101 and the inner end of the inner sleeve 102 are installed with the inner end cover 106 used to seal the inner end of the sealing chamber 107. The inner wall of the inner sleeve 102 is also provided with an annular groove connected to the sealing chamber 107. The annular groove is arranged on the main shaft 3, and the annular groove and the outer wall of the main shaft 3 form an isolation chamber 108 together. After entering the isolation chamber 108, the sealing medium is arranged on the outer wall of the main shaft 3, so as to achieve sealing. In order to prevent the sealing medium from leaking from both ends of the isolation chamber 108, a plurality of sealing rings are also embedded on the inner wall of the inner sleeve 102, and the plurality of sealing rings are respectively located at both ends of the isolation chamber 108.

[0037] An inner sealing ring 109 and an outer sealing ring 110 are installed between the outer ends of the inner sleeve 102 and the outer sleeve 101, and a buffer cavity 111 is formed between the inner sealing ring 109 and the outer sealing ring 110. The buffer cavity 111 is connected to the isolation chamber 108, so that the sealing medium in the isolation chamber 108 can enter the buffer cavity 111 for buffering. A sealing liquid inlet 112 connected to the sealing cavity 107 is provided on the inner end cover 106, and a sealing liquid outlet 113 connected to the buffer cavity 111 is provided on the outer end cover 103. A stationary ring 104 is also installed on the inner end cover 106, and a rotating ring 105 is installed on the inner end of the inner sleeve 102, and the rotating ring 105 is in contact with the stationary ring 104.

[0038] When the utility model is in use, the sealing liquid enters the sealing chamber 107, the isolation chamber 108, and the buffer chamber 111 in sequence through the sealing liquid inlet 112, and is finally discharged from the sealing liquid outlet 113; the cooling medium enters the water inlet chamber 207, the drainage groove 205, and the cooling chamber 203 in sequence through the cooling medium inlet 208, and is finally discharged from the cooling medium outlet 209.

[0039] The mechanical seal assembly 1 used in conjunction with the cooling assembly 2 in the utility model can be a mechanical seal assembly 1 of other structures besides the above structure. Of course, when necessary, the cooling assembly 2 provided by the utility model can also be used in conjunction with sealing structures such as packing seals.

[0040] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A mechanical seal structure for a high temperature kettle, characterized in that: It comprises a main shaft (3) and a mechanical seal assembly (1) mounted on the main shaft (3); a cooling assembly (2) is also mounted on the medium side of the mechanical seal assembly (1), and the cooling assembly (2) is sleeved on the main shaft (3).

2. The mechanical seal structure for a high temperature reactor according to claim 1, characterized in that: The cooling assembly (2) comprises an annular base (201) and a cap (202); the cap (202) is disposed on the annular base (201), and a cooling chamber (203) is formed inside the cap (202).

3. The mechanical seal structure for a high temperature reactor according to claim 2, characterized in that: The cooling assembly (2) further comprises a drainage sleeve (204) fixed on the annular base (201), the drainage sleeve (204) being sleeved on the main shaft (3), and a drainage groove (205) being provided on the drainage sleeve (204), and the drainage groove (205) being in communication with the cooling chamber (203).

4. The mechanical seal structure for a high temperature reactor according to claim 3, characterized in that: The drainage groove (205) is spiral-shaped.

5. The mechanical seal structure for a high temperature reactor according to claim 3, characterized in that: The cooling assembly (2) further comprises an intermediate shaft sleeve (206) fixed on the annular base (201), a water inlet chamber (207) being provided in the intermediate shaft sleeve (206), the water inlet chamber (207) being arranged on the periphery of the drainage groove (205), and the water inlet chamber (207) being communicated with the drainage groove (205).

6. The mechanical seal structure for a high temperature reactor according to claim 5, characterized in that: The annular base (201) is also provided with a cooling medium inlet (208) connected to the water inlet chamber (207) and a cooling medium outlet (209) connected to the cooling chamber (203).

7. The mechanical seal structure for a high temperature reactor according to claim 6, characterized in that: The cooling chamber (203) is located on a side of the annular base (201) away from the mechanical seal assembly (1).

8. The mechanical seal structure for a high temperature reactor according to any one of claims 1 to 6, characterized in that: The mechanical seal assembly (1) comprises an outer shaft sleeve (101) and an inner shaft sleeve (102); the inner shaft sleeve (102) is sleeved on the main shaft (3), and the outer shaft sleeve (101) and the inner shaft sleeve (102) are coaxially installed with each other at intervals; an outer end cover (103) is installed at the outer end of the outer shaft sleeve (101) and the outer end of the inner shaft sleeve (102); an inner end cover (106) is installed at the inner end of the outer shaft sleeve (101) and the inner end of the inner shaft sleeve (102); and a sealing cavity (107) is formed between the outer shaft sleeve (101) and the inner shaft sleeve (102); an annular groove communicating with the sealing cavity (107) is further formed on the inner wall of the inner shaft sleeve (102); the annular groove and the outer wall of the main shaft (3) together form an isolation chamber (108).

9. The mechanical seal structure for a high temperature reactor according to claim 8, characterized in that: An inner sealing ring (109) and an outer sealing ring (110) are also installed between the outer end of the inner shaft sleeve (102) and the outer end of the outer shaft sleeve (101); a buffer cavity (111) is formed between the inner sealing ring (109) and the outer sealing ring (110); the buffer cavity (111) is communicated with the isolation chamber (108); a sealing liquid inlet (112) communicated with the sealing cavity (107) is provided on the inner end cover (106); and a sealing liquid outlet (113) communicated with the buffer cavity (111) is provided on the outer end cover (103).

10. The mechanical seal structure for a high temperature reactor according to claim 8, characterized in that: A stationary ring (104) is also mounted on the inner end cover (106), and a rotating ring (105) is mounted on the inner end of the inner shaft sleeve (102), wherein the rotating ring (105) is in abutment with the stationary ring (104).

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