A packaged double mechanical seal

Abstract

The utility model provides a kind of double-end face mechanical sealing device of assembly, belong to mechanical seal technical field;Including rotating shaft, the shaft sleeve of being sleeved in the outer wall of rotating shaft, two dynamic rings of being sleeved in the outer wall of shaft sleeve, respectively rotationally arranged in the static ring of two dynamic rings mutually far away one end, and the shell of being jointly sleeved in the outside of two static rings;Shaft sleeve outer wall and located between two dynamic rings are sleeved with fixed ring, and first limiting device is connected between fixed ring and dynamic ring;One of static ring outside is sleeved with first annular block, and annular step that is compatible with first annular block is provided on shell inner wall;When needing to disassemble, shell is taken out from the outside of rotating shaft along axial direction, in the process of taking out, first annular block and annular step separate each other, then static ring is taken out from dynamic ring, then first limiting device is removed, so that dynamic ring and fixed ring separate each other, then dynamic ring is taken out from shaft sleeve, above disassembly operation is extremely convenient.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a containerized double-end mechanical seal device. Background Technology

[0002] The principle of double-end mechanical seals is basically the same as that of single-end mechanical seals. Both rely on the end faces (friction pairs) perpendicular to the axis of rotation to maintain contact and relative sliding under the action of fluid pressure, the elastic force of the compensation mechanism, and the cooperation of auxiliary seals to form a device that prevents fluid leakage.

[0003] During long-term use, sealing devices may experience malfunctions such as leakage or radial displacement between the device and the shaft. In order to accurately locate the fault, it is often necessary to disassemble the sealing device one by one. Therefore, a mechanical seal device that is easy to disassemble is required. Utility Model Content

[0004] The purpose of this invention is to provide a modular double-end mechanical seal device for easy disassembly.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A cartridge-type double-end mechanical seal device includes a rotating shaft, a bushing sleeved on the outer wall of the rotating shaft, two rotating rings sleeved on the outer wall of the bushing sleeve, stationary rings rotatably disposed at opposite ends of the two rotating rings, and a housing sleeved on the outside of the two stationary rings; a fixed ring is sleeved on the outer wall of the bushing sleeve between the two rotating rings, and the fixed ring is connected to the rotating rings by a first limiting device; a first annular block is sleeved on the outside of one of the stationary rings, and an annular step adapted to the first annular block is provided on the inner wall of the housing.

[0007] In the above solution, by setting a fixed ring, after the two moving rings are fitted onto the bushing from both ends, the two moving rings are limited by the first limiting device between themselves and the fixed ring, thereby improving the connection between the two moving rings and the fixed ring. At the same time, it can also improve the connection between the moving rings and the bushing, thereby reducing the possibility of radial movement of the bushing and the rotating shaft fixedly connected to the bushing within the two moving rings. By setting an annular step and a first annular block, after the rotating shaft passes through the outer shell, the first annular block and the annular step can be in close contact, thereby increasing the contact area between the stationary ring and the outer shell, and improving the connection between the two.

[0008] When disassembly is required, simply remove the outer casing from the outside of the rotating shaft along the axial direction. During the removal process, the first annular block and the annular step separate from each other. Then, remove the stationary ring from the moving ring. After that, release the first limiting device to separate the moving ring from the fixed ring. Finally, remove the moving ring from the bushing. The bushing and the rotating shaft are fixedly connected and do not need to be disassembled. The above disassembly operation is extremely convenient.

[0009] Preferably, the first limiting device includes a first bolt disposed between the moving ring and the fixed ring.

[0010] The above scheme further defines the structure of the first limiting device. By setting the first bolt, the connection between the fixed ring and the moving ring can be strengthened.

[0011] Preferably, on the two surfaces of the moving ring and the fixed ring that are close to each other, a second annular block is provided on one surface, and a first annular groove adapted to the second annular block is provided on the other surface.

[0012] In the above scheme, by setting the first annular block and the first annular groove, the connection between the moving ring and the fixed ring can be further improved, and the sealing performance of the two can be improved at the same time.

[0013] Preferably, a plug is circumferentially movably provided at the end of the stationary ring away from the moving ring that is not fitted with the first annular block, and a slot adapted to the plug is provided on the inner wall of the outer shell; the plug and the stationary ring are fixed together by a second bolt, and the plug and the shell are fixed together by a third bolt.

[0014] In the above scheme, by setting the insert and slot, after the outer shell is completely fitted over the outside of the stationary ring, the insert can be moved along the radial direction of the rotating shaft, thereby inserting the insert into the slot. Then, the insert is fixed to the stationary ring and the outer shell by the second and third bolts, so as to further improve the connection between the stationary ring and the outer shell.

[0015] Preferably, the bottom end of the insert block is provided with a slider, and the top end of the annular step is provided with a groove that matches the insert block.

[0016] In the above scheme, by setting a slider and a groove, the slider can slide within the groove when the insert moves in the radial direction of the rotating shaft, thereby...

[0017] Preferably, the first annular block and the annular step are fixed together by a fourth bolt.

[0018] In the above scheme, the connection between the first annular block and the annular step can be strengthened by setting a fourth bolt.

[0019] Preferably, the bushing has a second annular groove at one end near the annular step, and the outer casing has a third annular block that matches the second annular groove inside.

[0020] In the above scheme, by setting a second annular groove and a third annular block, the third annular block can rotate in the second annular groove when the bushing rotates, thereby improving the sealing performance between the housing and the bushing and thus improving the sealing performance of the mechanical seal device.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] By setting a fixed ring, after the two moving rings are fitted onto the bushing from both ends, the two moving rings are limited by the first limiting device between themselves and the fixed ring, thereby improving the connection between the two moving rings and the fixed ring. At the same time, it also improves the connection between the moving rings and the bushing, thereby reducing the possibility of radial movement of the bushing and the rotating shaft fixedly connected to the bushing within the two moving rings. By setting an annular step and a first annular block, after the rotating shaft passes through the outer shell, the first annular block and the annular step are in close contact, thereby increasing the contact area between the stationary ring and the outer shell, and improving the connection between them.

[0023] When disassembly is required, simply remove the outer casing from the outside of the rotating shaft along the axial direction. During the removal process, the first annular block and the annular step separate from each other. Then, remove the stationary ring from the moving ring. After that, release the first limiting device to separate the moving ring from the fixed ring. Finally, remove the moving ring from the bushing. The bushing and the rotating shaft are fixedly connected and do not need to be disassembled. The above disassembly operation is extremely convenient. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the present invention from the front view.

[0025] Figure 2 This is a schematic diagram of the structure of this utility model viewed from the right.

[0026] Figure 3 This is a cross-sectional view of the structure of this utility model from the left view direction;

[0027] Figure 4 This is a schematic diagram of the outer shell of this utility model viewed from the right.

[0028] In the diagram: 100-rotating shaft, 110-shoulder sleeve, 120-moving ring, 130-stationary ring, 140-outer shell, 150-fixed ring, 160-first annular block, 170-annular step, 180-first bolt, 190-second annular block, 200-first annular groove, 210-insertion block, 220-slot, 230-second bolt, 240-third bolt, 250-slider, 260-slide groove, 270-fourth bolt, 280-second annular groove, 290-third annular block. Detailed Implementation

[0029] The following is an explanation of the appendix of this utility model. Figures 1 to 4 The technical solutions in the embodiments of this utility model are clearly and completely described, but the protection scope of this utility model is not limited to the following description.

[0030] Example 1

[0031] A type of containerized double-end mechanical seal device, such as Figure 1 and Figure 3 As shown, it includes a rotating shaft 100, a bushing 110 sleeved on the outer wall of the rotating shaft 100, two rotating rings 120 sleeved on the outer wall of the bushing 110, stationary rings 130 rotatably disposed at opposite ends of the two rotating rings 120, and a housing 140 sleeved on the outside of the two stationary rings 130; a fixed ring 150 is sleeved on the outer wall of the bushing 110 and located between the two rotating rings 120, and the fixed ring 150 is connected to the rotating rings 120 by a first limiting device; one end of the housing 140 is open, a first annular block 160 is sleeved on the outside of one of the stationary rings 130, and the inner wall of the closed end of the housing 140 is provided with an annular step 170 adapted to the first annular block 160; further, as Figure 1 and Figure 3 As shown, the first limiting device includes a first bolt 180 disposed between the moving ring 120 and the fixed ring 150. Further, as... Figure 1 and Figure 3 As shown, on two surfaces of the moving ring 120 and the fixed ring 150 that are close to each other, a second annular block 190 is provided on one surface, and a first annular groove 200 adapted to the second annular block 190 is provided on the other surface. Further, as... Figure 1 and Figure 4 As shown, the bushing 110 has a second annular groove 280 at one end near the annular step 170, and the outer casing 140 has a third annular block 290 that matches the second annular groove 280 inside. Furthermore, the first annular block 160 and the annular step 170 are fixed together by a fourth bolt 270.

[0032] During solid installation, two moving rings 120 are respectively fitted onto the bushing 110 along the end of the rotating shaft 100, and the second annular block 190 between the moving ring 120 and the fixed ring 150 is tightly inserted into the first annular groove 200. Then, the second annular block 190 and the first annular groove 200 are fixed together by the first bolt 180. Then, two stationary rings 130 are respectively fitted onto the outside of the rotating shaft 100 and rotatably connected to the moving ring 120. Then, the outer shell 140 is fitted onto the rotating shaft 100 and moved along the axial direction of the rotating shaft 100 until the annular step 170 inside the outer shell 140 and the first annular block 160 on the stationary ring 130 are in close contact. Then, the annular step 170 and the first annular block 160 are fixed together by the fourth bolt 270. The outer shell 140 and the stationary ring 130 and the fixed ring 150 without the first annular block 160 are in close contact. Furthermore, when the outer shaft 100 of the outer casing 140 moves outside, the third annular block 290 is gradually inserted into the second annular groove 280 to achieve a rotatable connection, thus completing the assembly of the sealing device. When disassembly is required, first remove the fourth bolt 270, then remove the outer casing 140 from the outside of the shaft 100 along the axial direction. During the removal process, the first annular block 160 and the annular step 170 separate from each other. Then, remove the stationary ring 130 from the moving ring 120, then remove the first bolt 180 to separate the moving ring 120 from the fixed ring 150. Finally, remove the moving ring 120 from the bushing 110. The disassembly operation is extremely convenient.

[0033] Example 2

[0034] Based on Example 1, such as Figure 1 and Figure 2 As shown, a plug 210 is circumferentially movably disposed at the end of the stationary ring 130 (without the first annular block 160) away from the moving ring 120. A slot 220 adapted to the plug 210 is provided on the inner wall of the outer shell 140. The plug 210 and the stationary ring 130 are fixed together by a second bolt 230, and the plug 210 and the shell are fixed together by a third bolt 240. Furthermore, a slider 250 is provided at the bottom end of the plug 210, and a groove 260 adapted to the plug 210 is provided at the top end of the annular step 170.

[0035] In practice, after the outer shell 140 is tightly fitted onto the outside of the stationary ring 130, the slider 250 slides in the groove 260, thereby inserting the insert 210 into the slot 220. Then, the insert 210 is fixed to the stationary ring 130 and the outer shell 140 by the second bolt 230 and the third bolt 240, so as to further improve the connection between the stationary ring 130 and the outer shell 140.

[0036] In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "longitudinal," and "horizontal," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of facilitating the description of this patent and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent.

[0037] The above are merely preferred embodiments of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A cartridge-type double-end mechanical seal device, comprising a rotating shaft (100), a bushing (110) sleeved on the outer wall of the rotating shaft (100), two rotating rings (120) sleeved on the outer wall of the bushing (110), stationary rings (130) rotatably disposed on the two rotating rings (120) at ends away from each other, and a housing (140) sleeved on the outside of the two stationary rings (130); characterized in that, A fixed ring (150) is sleeved on the outer wall of the bushing (110) and located between the two moving rings (120). The fixed ring (150) is connected to the moving ring (120) by a first limiting device. A first annular block (160) is sleeved on the outside of one of the stationary rings (130). An annular step (170) adapted to the first annular block (160) is provided on the inner wall of the outer shell (140).

2. The containerized double-end mechanical seal device according to claim 1, characterized in that, The first limiting device includes a first bolt (180) disposed between the moving ring (120) and the fixed ring (150).

3. A containerized double-end mechanical seal device according to claim 2, characterized in that, On the two surfaces of the moving ring (120) and the fixed ring (150) that are close to each other, a second annular block (190) is provided on one surface, and a first annular groove (200) adapted to the second annular block (190) is provided on the other surface.

4. A containerized double-end mechanical seal device according to claim 1, characterized in that, A plug (210) is circumferentially movably provided at the end of the stationary ring (130) away from the moving ring (120) without the first annular block (160). The inner wall of the outer shell (140) is provided with a slot (220) that is adapted to the plug (210). The plug (210) and the stationary ring (130) are fixed together by a second bolt (230), and the plug (210) and the outer shell are fixed together by a third bolt (240).

5. A containerized double-end mechanical seal device according to claim 4, characterized in that, The bottom end of the insert (210) is provided with a slider (250), and the top end of the annular step (170) is provided with a groove (260) that is adapted to the insert (210).

6. A containerized double-end mechanical seal device according to claim 1, characterized in that, The first annular block (160) and the annular step (170) are fixed together by a fourth bolt (270).

7. A containerized double-end mechanical seal device according to claim 1, characterized in that, The bushing (11) is provided with a second annular groove (280) at one end near the annular step (170), and the outer shell (140) is provided with a third annular block (290) that is adapted to the second annular groove (280).

Images