A parking sealing structure for motor equipment

Abstract

This utility model discloses a parking sealing structure for motor equipment, including a main shaft, a dry gas seal, and a gas sealing mechanism. Both the gas sealing mechanism and the dry gas seal are mounted on the main shaft. The gas sealing mechanism is positioned between the medium equipment below the main shaft and the dry gas seal. The dry gas seal is used to seal the medium, and the gas sealing mechanism is used to isolate the medium from the dry gas seal when it stops rotating. In this utility model, by setting a gas sealing mechanism between the dry gas seal and the medium equipment, when the dry gas seal stops rotating, an external gas source pressurizes the gas sealing mechanism, causing it to cut off the medium equipment side channel and seal the medium. This eliminates the need to release gas from the medium equipment. Simultaneously, the bottom cover assembly can axially limit the main shaft, facilitating the removal, maintenance, and repair of the dry gas seal.

Description

Technical Field

[0001] This utility model belongs to the field of dry gas sealing technology, specifically relating to a parking sealing structure for motor equipment. Background Technology

[0002] Dry gas seals are mostly used for sealing rotating equipment such as compressors or reactors. They form a gas film through high-speed rotation to seal the medium. However, there are usually some impurities in the medium-side container. When the dry gas seal rotates, a small amount of impurities will be carried into its rotating ring, causing wear on the rotating or stationary ring. Therefore, it is necessary to stop the machine for cleaning or maintenance. In the traditional maintenance process, when the dry gas seal is stopped, the gas in the medium container needs to be released in advance before the dry gas seal can be inspected. Otherwise, it will lead to gas leakage, causing pollution or accidents. However, the gas emission process is cumbersome and requires the preparation of a special collection container for temporary storage, which makes the maintenance and replacement of dry gas seals time-consuming. Utility Model Content

[0003] The purpose of this utility model is to provide a parking sealing structure for motor equipment. By setting a gas sealing mechanism between the dry gas seal and the medium equipment, when the dry gas seal stops rotating, the gas sealing mechanism is pressurized by an external gas source to cut off the medium equipment side channel and seal the medium. At the same time, the bottom cover assembly can axially limit the main shaft, which facilitates the disassembly, maintenance and repair of the dry gas seal.

[0004] This utility model is achieved through the following technical solution:

[0005] A parking sealing structure for motorized equipment includes a main shaft, a dry gas seal, and a gas sealing mechanism. Both the gas sealing mechanism and the dry gas seal are mounted on the main shaft. The gas sealing mechanism is positioned between the medium equipment below the main shaft and the dry gas seal. The dry gas seal is used to seal the medium, and the gas sealing mechanism is used to isolate the dry gas seal from the medium when it stops rotating.

[0006] Preferably, the gas sealing mechanism includes a top cover, a bottom cover assembly, a side plate assembly, and a sliding sealing assembly. The side plate assembly is located between the top cover and the bottom cover. The top cover is connected to the base plate of the dry gas seal. The bottom cover assembly is connected to the media device. Both the top cover and the bottom cover assembly are spaced apart from the main shaft. The side plate assembly is connected to an external gas source. The sliding sealing assembly is sleeved on the main shaft and spaced apart from the main shaft. A rotating ring assembly is provided between the sliding sealing assembly and the bottom cover. When the sliding sealing assembly is subjected to pressure from the external gas source, it moves downward and abuts against the top surface of the rotating ring assembly to isolate the media in the media device.

[0007] Preferably, the sliding sealing assembly includes a slider, a first O-ring, and a spring. The outer side of the slider abuts against the side plate assembly, and the inner side of the slider is spaced apart from the main shaft. The first O-ring is disposed at the bottom of the slider. The spring is disposed between the slider and the side plate assembly and is used for resetting the slider.

[0008] Preferably, the side plate assembly includes a side plate, a connecting bolt, and a second O-ring. The side plate has a threaded hole, and the connecting bolt passes through the top cover and the side plate and connects to the bottom cover assembly. The second O-ring is located on the top of the side plate and abuts against the top cover. The side plate has an air inlet located above the sliding member and is connected to an external air source.

[0009] Preferably, the side plate is provided with a limiting hole, and the outer side of the slider is provided with a limiting screw, which extends into the limiting hole and is limited by the limiting hole.

[0010] Preferably, the sliding member has a third O-ring and a fourth O-ring on both sides of the limiting screw.

[0011] Preferably, the moving ring assembly includes a driving ring and a following ring, the following ring being located above the driving ring, the driving ring being connected to the main shaft, the following ring being connected to the driving ring, and the first O-ring abutting against the following ring after the sliding member moves down.

[0012] Preferably, the bottom cover assembly includes a bottom cover, a drive bolt, and a limiting plate. The drive bolt is located in the bottom cover and is perpendicular to the outer surface of the main shaft. The limiting plate is a semi-circular plate structure with a limiting groove on its side. The end of the drive bolt has a protrusion located in the limiting groove and limited by the limiting groove. The main shaft has a groove, and the limiting plate cooperates with the groove. The rotation of the drive bolt drives the limiting plate to move and abut against the groove of the main shaft. The limiting plate is used to axially limit the main shaft.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] 1) In this utility model, a gas sealing mechanism is set between the dry gas seal and the medium equipment. When the dry gas seal stops rotating, the gas sealing mechanism is pressurized by an external gas source to cut off the medium equipment side channel and seal the medium. There is no need to release the gas in the medium equipment. At the same time, the bottom cover assembly can axially limit the main shaft, which facilitates the disassembly, maintenance and repair of the dry gas seal.

[0015] 2) In this utility model, the sliding member is positioned at the upper limit of the main shaft by the top cover, side plate and bottom cover. The side plate is provided with an air inlet hole. The sliding member is moved down by external pressure, so that the first O-ring at the bottom of the sliding member abuts against the surface of the moving ring assembly on the main shaft, thereby blocking the flow channel of the medium and sealing the medium in the medium equipment, so that the dry gas seal can be directly removed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional schematic diagram of the parking sealing structure for motorized equipment in this utility model.

[0018] Wherein: 1-Top cover, 2-Side plate, 21-Air inlet, 22-Limiting hole, 23-Second O-ring, 3-Bottom cover assembly, 31-Bottom cover, 32-Drive bolt, 321-Protrusion, 4-Sliding component, 41-First O-ring, 42-Limiting screw, 43-Spring, 44-Third O-ring, 45-Fourth O-ring, 5-Limiting plate, 6-Moving ring assembly, 61-Drive ring, 62-Follower ring, 7-Main shaft, 71-Groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0020] Example 1:

[0021] A parking sealing structure for motor equipment, such as Figure 1As shown, the system includes a main shaft, a dry gas seal, and a gas sealing mechanism. Taking a reactor as an example, the reactor body is used to store the medium. The main shaft 7 extends into the reactor to stir the medium. Both the gas sealing mechanism and the dry gas seal are mounted on the main shaft 7 and located at the port of the reactor body, used to seal the medium in the reactor. The gas sealing mechanism is positioned between the medium device below the main shaft 7 and the dry gas seal. The dry gas seal is used to seal the medium, and the gas sealing mechanism is used to isolate the medium when the dry gas seal stops rotating. When the dry gas seal rotates, the external gas source does not pressurize it, and the medium flows through the gas sealing mechanism to the position of the dry gas seal, where it is sealed by the gas film formed by the dry gas seal. When the dry gas seal needs maintenance or replacement, the gas sealing mechanism is pressurized by the external gas source to block the medium, preventing its passage, thus allowing the dry gas seal to be removed for inspection or replacement. The gas sealing mechanism includes a top cover 1, a bottom cover assembly 3, a side plate assembly 2, and a sliding seal assembly. The side plate assembly 2 is located between the top cover 1 and the bottom cover 31. The top cover 1 is bolted to the base plate of the dry gas seal, and the bottom cover assembly 3 is bolted to the media equipment. Both the top cover 1 and the bottom cover assembly 3 are spaced apart from the surface of the main shaft 7, allowing the media in the media equipment to flow along the main shaft 7 to the location of the dry gas seal. The side plate assembly 2 is connected to an external gas source, and the sliding seal assembly is sleeved on the main shaft 7 and is also connected to the main shaft 7. An alternating arrangement is provided, with a rotating ring assembly 6 between the sliding sealing assembly and the bottom cover 31. The rotating ring assembly 6 is connected to the main shaft 7. The medium flows into the space between the rotating ring assembly 6 and the side plate 2 assembly through the gap between the bottom cover assembly 3 and the main shaft 7, and then enters the dry gas seal position after passing through the gap between the top cover 1 and the main shaft 7. After the dry gas seal stops rotating, the sliding sealing assembly is pressurized by an external air source. The sliding sealing assembly moves down under the pressure of the external air source and abuts against the top surface of the rotating ring assembly 6, thus isolating the medium in the medium device.

[0022] Example 2:

[0023] This embodiment, based on the above embodiment, further defines the sliding sealing assembly and the side plate 2 assembly. The sliding sealing assembly includes a sliding member 4, a first O-ring 41, and a spring 43. The sliding member 4 has a ring structure. The outer side of the sliding member 4 abuts against the side plate 2 assembly, and the inner side of the sliding member 4 is spaced apart from the main shaft 7. The medium can enter the dry gas seal through the gap between the sliding member 4 and the main shaft 7. The first O-ring 41 is located at the bottom of the sliding member 4. When the external air source is pressurized, the sliding member 4 moves down, and the first O-ring 41 abuts against the surface of the moving ring assembly 6, blocking the medium. The spring 43 is located between the sliding member 4 and the side plate 2 assembly. The spring 43 is used to reset the sliding member 4. After the external air source is depressurized, the sliding member 4 is reset under the action of the spring 43, allowing the medium to pass through.

[0024] The side plate 2 assembly includes a side plate 2, a connecting bolt, and a second O-ring 23. The side plate 2 is provided with a threaded hole. The connecting bolt passes through the top cover 1 and the side plate 2 and is connected to the bottom cover assembly 3 to keep the top cover 1, the side plate 2, and the bottom cover assembly 3 stable. The second O-ring 23 is located on the top of the side plate 2 and abuts against the top cover 1 to prevent the medium from flowing out from the gap of the top cover 1. The side plate 2 is provided with an air inlet 21, which is located above the sliding member 4. The air inlet 21 is connected to an external air source. The external air source delivers gas into the space between the sliding member 4 and the top cover 1, thereby squeezing the sliding member 4 to move downward. The side plate 2 is provided with a limiting hole 22, and the outer side of the sliding member 4 is provided with a limiting screw 42. The limiting screw 42 extends into the limiting hole 22 and is limited by the limiting hole 22, so that the sliding member 4 can only move up and down within the height range of the limiting hole 22. When the external air source does not enter the upper part of the sliding member 4, the limiting screw 42 abuts against the upper screw of the limiting hole 22. When the external air source pressurizes the sliding member 4, the limiting screw 42 abuts against the lower surface of the limiting hole 22. Therefore, the position of the limiting screw 42 can be observed through the limiting hole 22 to determine whether the sliding member 4 has moved down. After ensuring that the medium has been blocked, the dry gas seal can be disassembled. A third O-ring 44 is provided on the side of the sliding member 4 on one side of the limiting screw 42, and a fourth O-ring 45 is provided on the other side to prevent the medium from flowing out between the sliding member 4 and the side plate 2. The moving ring assembly 6 includes a driving ring 61 and a following ring 62. The following ring 62 is located above the driving ring 61. The driving ring 61 is connected to the main shaft 7, and the following ring 62 is connected to the driving ring 61. After the sliding member 4 moves down, the first O-ring 41 abuts against the following ring 62. When the main shaft 7 rotates, the driving ring 61 and the following ring 62 rotate accordingly. When the main shaft 7 stops, the driving ring 61 and the following ring 62 stop accordingly. The first O-ring 41 abuts against the surface of the following ring 62, blocking the medium passage and achieving medium barrier sealing.

[0025] Example 3:

[0026] Based on the above embodiments, this embodiment further defines the bottom cover assembly 3. The bottom cover assembly 3 includes a bottom cover 31, a drive bolt 32, and a limiting plate 5. The drive bolt 32 is located in the bottom cover 31 and is perpendicular to the outer surface of the main shaft 7. The drive bolt 32 passes laterally through the bottom cover 31 from the side. The limiting plate 5 is a semi-circular plate structure with a limiting groove on its side. The end of the drive bolt 32 is provided with a protrusion 321, which is located in the limiting groove and limited by the limiting groove. The rotation of the drive bolt 32 can drive the protrusion 321 to rotate, and the protrusion 321 can rotate in the limiting groove. The rotation of the drive bolt 32 can drive the limiting plate 5 to move forward or backward. The main shaft 7 is provided with a groove 71, and the limiting plate 5 cooperates with the groove 71. The rotation of the drive bolt 32 drives the limiting plate 5 to move toward the main shaft 7 and abut against the groove 71 of the main shaft 7. After the limiting plate 5 is engaged in the groove 71, it can axially limit the main shaft 7 and prevent the main shaft 7 from moving up and down during the removal of the dry gas seal. The other parts of this embodiment are the same as those in the above embodiments, and will not be repeated here.

[0027] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify 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. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A parking seal structure for a moving device, characterized by, It includes a main shaft, a dry gas seal, and a gas sealing mechanism. Both the gas sealing mechanism and the dry gas seal are mounted on the main shaft. The gas sealing mechanism is located between the media device below the main shaft and the dry gas seal. The dry gas seal is used to seal the media, and the gas sealing mechanism is used to isolate the dry gas seal from the media when it stops rotating.

2. The parking seal for mobile equipment of claim 1, wherein, The gas sealing mechanism includes a top cover, a bottom cover assembly, a side plate assembly, and a sliding sealing assembly. The side plate assembly is located between the top cover and the bottom cover. The top cover is connected to the base plate of the dry gas seal. The bottom cover assembly is connected to the media device. Both the top cover and the bottom cover assembly are spaced apart from the main shaft. The side plate assembly is connected to an external gas source. The sliding sealing assembly is sleeved on the main shaft and spaced apart from the main shaft. A rotating ring assembly is provided between the sliding sealing assembly and the bottom cover. When the sliding sealing assembly is subjected to pressure from the external gas source, it moves downward and abuts against the top surface of the rotating ring assembly, thus isolating the media in the media device.

3. The parking seal for mobile equipment of claim 2, wherein, The sliding sealing assembly includes a slider, a first O-ring, and a spring. The outer side of the slider abuts against the side plate assembly, and the inner side of the slider is spaced apart from the main shaft. The first O-ring is disposed at the bottom of the slider. The spring is disposed between the slider and the side plate assembly and is used for resetting the slider.

4. The parking seal for mobile equipment of claim 3, wherein, The side plate assembly includes a side plate, a connecting bolt, and a second O-ring. The side plate has a threaded hole. The connecting bolt passes through the top cover and the side plate and connects to the bottom cover assembly. The second O-ring is located on the top of the side plate and abuts against the top cover. The side plate has an air inlet located above the sliding member and is connected to an external air source.

5. The parking seal for mobile equipment of claim 4, wherein, The side plate is provided with a limiting hole, and the outer side of the sliding member is provided with a limiting screw. The limiting screw extends into the limiting hole and is limited by the limiting hole.

6. The parking seal structure for mobile equipment according to claim 5, wherein The sliding component has a third O-ring and a fourth O-ring on both sides of the limiting screw.

7. The parking seal structure for mobile equipment according to claim 3, wherein The moving ring assembly includes a driving ring and a follower ring. The follower ring is located above the driving ring. The driving ring is connected to the main shaft, and the follower ring is connected to the driving ring. After the sliding member moves down, the first O-ring abuts against the follower ring.

8. The parking seal for mobile equipment of claim 2, wherein, The bottom cover assembly includes a bottom cover, a drive bolt, and a limiting plate. The drive bolt is located in the bottom cover and is perpendicular to the outer surface of the main shaft. The limiting plate is a semi-circular plate structure with a limiting groove on its side. The end of the drive bolt has a protrusion located in the limiting groove and limited by the limiting groove. The main shaft has a groove, and the limiting plate cooperates with the groove. The rotation of the drive bolt drives the limiting plate to move and abut against the groove of the main shaft. The limiting plate is used to axially limit the main shaft.

Images