Low-speed dry gas seal groove structure for a kettle

Abstract

The utility model discloses a kind of low-speed dry gas seal groove type structures for kettle, including stationary ring body, stationary ring body is annular structure, stationary ring body includes connecting surface and air inlet face, connecting surface is used to connect static ring seat, several pressure grooves are set on air inlet face along its circumferential direction, pressure groove is annular array arrangement on air inlet face;Air inlet face is close to rotating ring setting, rotating ring rotation makes airflow enter pressure groove, pressure in pressure groove rises and pushes rotating ring away to make gap between rotating ring and stationary ring body, in the utility model, first high-pressure groove and second high-pressure groove are additionally provided at the end of the gas guiding groove of stationary ring, compared with traditional pressure groove, the pressurization area of first high-pressure groove and second high-pressure groove doubles, under the condition of the same rotating speed and air intake of rotating ring, the improved stationary ring pressure groove can generate greater thrust, rotating ring can still be pushed away under low rotating speed, so it can be used for the sealing of low-pressure low-speed reaction kettle.

Description

Technical Field

[0001] This utility model belongs to the technical field of dry gas sealing components, specifically relating to a low-speed dry gas sealing groove structure for reactors. Background Technology

[0002] Reactors are key equipment in chemical, fiber, petrochemical, and pharmaceutical production. They are primarily used for chemical reaction processes, capable of withstanding high temperatures and pressures to ensure the safety and efficiency of the reaction. A reactor generally consists of four parts: the vessel body, a stirrer, a transmission mechanism, and a shaft sealing device. Dry gas seals are a new type of non-contact shaft seal. They utilize clean, dry gas to form a gas barrier between the rotating mechanical parts and the sealing components to prevent liquid or gas leakage. This is mainly achieved by using gas pressure higher than the liquid or gas pressure to block leakage. In existing dry gas seals, the rotating ring rotates, introducing gas into the pressure groove of the stationary ring. The pressure accumulates at the end of the pressure groove, pushing the rotating ring away and maintaining a gap between the stationary and rotating rings to prevent friction. However, existing dry gas seals have a simple pressure groove structure on the stationary ring. The high-pressure groove at the end of the pressure groove requires high-speed rotation of the rotating ring to generate sufficient pressure to push it away, while the shaft speed of the stirrer in the reactor is usually not high enough. Therefore, it is necessary to improve the pressure groove of the stationary ring so that the rotating ring can still generate sufficient pressure in the pressure groove of the stationary ring to push the rotating ring away under low speed conditions. Utility Model Content

[0003] The purpose of this invention is to provide a low-speed dry gas sealing groove structure for reactors. A first high-pressure groove and a second high-pressure groove are added to the end of the air intake groove of the stationary ring. Compared with the traditional pressure groove, the first high-pressure groove and the second high-pressure groove have double the pressure-increasing area. Under the same speed and air intake conditions, they can generate greater pressure, thus enabling them to be used for sealing low-pressure, low-speed reactors.

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

[0005] A low-speed dry gas sealing groove structure for reactors includes a stationary ring body, which is an annular structure. The stationary ring body includes a connecting surface and an air inlet surface. The connecting surface is a stepped structure and is used to connect to a stationary ring seat. Several pressure grooves are arranged circumferentially on the air inlet surface in a circular array. The air inlet surface is located close to a rotating ring. When the rotating ring rotates, airflow enters the pressure grooves. The pressure in the pressure grooves increases, pushing the rotating ring away and creating a gap between the rotating ring and the stationary ring body.

[0006] Preferably, the pressure groove is inclined in a clockwise direction from the outer edge of the air inlet surface to the inner edge.

[0007] Preferably, the pressure groove includes an air intake groove and a high-pressure groove group. The air intake groove is connected to the outer edge of the air intake surface, and the high-pressure groove group is disposed at the end of the air intake groove and is connected to the air intake groove.

[0008] Preferably, the high-pressure groove group includes a first high-pressure groove and a second high-pressure groove, the first high-pressure groove is located near the outer edge of the air intake surface, the second high-pressure groove is located near the inner edge of the air intake surface, and the first high-pressure groove and the second high-pressure groove are spaced apart.

[0009] Preferably, the first high-pressure tank and the second high-pressure tank have the same maximum depth, and the end depth of the air intake tank is greater than the maximum depth of the first high-pressure tank and the second high-pressure tank.

[0010] Preferably, the depth of the end of the air intake groove is 9μm-5.5μm.

[0011] Preferably, the maximum depth of the first high-pressure tank and the second high-pressure tank is 4μm-5μm.

[0012] Preferably, the distance from the end of the first high-pressure tank to the central axis of the stationary ring body is equal to the distance from the end of the second high-pressure tank to the central axis of the stationary ring.

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

[0014] 1) In this utility model, a first high-pressure groove and a second high-pressure groove are added to the end of the air intake groove of the stationary ring. Compared with the traditional pressure groove, the pressure-increasing area of ​​the first high-pressure groove and the second high-pressure groove is doubled. Under the same rotation speed and air intake conditions of the rotating ring, the improved stationary ring pressure groove can generate greater thrust and can still push the rotating ring away at low speed. Therefore, it can be used for sealing of low-pressure and low-speed reactors.

[0015] 2) In this utility model, the height of the pressure groove gradually decreases from the outer edge of the air inlet surface to the inner edge of the air inlet surface, and finally the ends of the first high pressure groove and the second high pressure groove are flush with the surface of the air inlet surface. The depth of the end of the air intake groove is greater than the maximum depth of the first high pressure groove and the second high pressure groove, so that a large amount of gas shell enters the first high pressure groove and the second high pressure groove from the air intake groove. Since the first high pressure groove and the second high pressure groove have small areas and shallow depths, they can quickly generate large pressure, causing the rotating ring to separate quickly and reducing the wear between the rotating ring and the stationary ring. 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 schematic diagram of the structure of the pressure groove in the stationary ring body of this utility model.

[0018] Figure 2 This is a schematic diagram of the assembly structure of the dry gas seal and the main shaft in this utility model.

[0019] Wherein: 1-Stationary ring body, 2-Inlet surface, 21-Inlet groove, 22-First high-pressure groove, 23-Second high-pressure groove, 3-Connecting surface, 4-Rotating ring, 5-Medium stationary ring seat, 6-Atmospheric stationary ring seat, 7-Sealing shell, 8-Shaft sleeve, 9-Main shaft. Detailed Implementation

[0020] 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.

[0021] Example 1:

[0022] A low-speed dry gas sealing groove structure for reactors, such as Figure 1 and Figure 2As shown, the dry gas seal includes a stationary ring seat assembly, a sealing shell 7, and a dynamic and stationary ring assembly. The dynamic and stationary ring assembly includes a set of rotating rings 4 and a set of stationary ring bodies 1. The set of rotating rings 4 are arranged opposite each other and located between the two stationary ring bodies 1. The side of the stationary ring body 1 closest to the rotating rings 4 is the air inlet surface 2. The surface of the air inlet surface 2 is provided with multiple pressure grooves. The pressure grooves are arranged in a ring array on the stationary ring body 1. Preferably, there are twelve pressure grooves, and the spacing between the pressure grooves is the same. The stationary ring body 1 has a ring structure. The other side of the stationary ring body 1 is the connecting surface 3. The connecting surface 3 has a stepped structure and is used to connect to the stationary ring seat. The stationary ring seat assembly includes a medium stationary ring seat 5 and an atmospheric stationary ring seat 6. The atmospheric stationary ring seat 6 is located above the medium stationary ring seat 5. The lower stationary ring body 1 in the dynamic and stationary ring assembly is connected to the medium stationary ring seat 5, and the upper stationary ring body 1 is connected to the atmospheric stationary ring seat 6. The ring seat 6 is connected, and the sealing shell 7 is set between the atmospheric static ring seat 6 and the medium static ring seat 5. The atmospheric static ring seat 6, the medium static ring seat 5 and the sealing shell 7 cover the dynamic and static ring assembly. The air inlet surface 2 of the static ring body 1 is set close to the rotating ring 4. The rotation of the rotating ring 4 causes the airflow to enter the pressure groove. The pressure in the pressure groove increases and pushes the rotating ring 4 away, creating a gap between the rotating ring 4 and the static ring body 1. The pressure groove extends from the outer edge of the air inlet surface 2 to the inner edge and is set in a clockwise direction. The pressure groove includes an air intake groove 21 and a high pressure groove group. The air intake groove 21 is connected to the outer edge of the air intake surface 2. The high pressure groove group is set at the end of the air intake groove 21 and is connected to the air intake groove 21. The gas enters the pressure groove through the air intake groove 21. Under the condition that the rotating ring 4 rotates, the pressure in the high pressure groove group gradually increases until it pushes the rotating ring 4 away. The static ring body 1 is stationary throughout the process. The main shaft 9 of the reactor is connected to the stirrer and inserted into the reactor body. The bushing 8 is fitted on the main shaft 9. The dynamic and static ring assembly, the sealing shell 7 and the static ring seat assembly are all fitted on the bushing 8 and located between the reactor body opening and the bushing 8, for sealing the reactor body.

[0023] Example 2:

[0024] This embodiment further defines the pressure groove based on the above embodiment, such as... Figure 2As shown, the high-pressure groove assembly includes a first high-pressure groove 22 and a second high-pressure groove 23. The first high-pressure groove 22 is located near the outer edge of the air intake surface 2, and the second high-pressure groove 23 is located near the inner edge of the air intake surface 2. The first high-pressure groove 22 and the second high-pressure groove 23 are spaced apart, and the distance between the first high-pressure groove 22 and the second high-pressure groove 23 gradually increases from the end of the air intake groove 21 to the rear. The maximum depth of the first high-pressure groove 22 and the second high-pressure groove 23 is the same, both being 5 μm. The deepest position of the first high-pressure groove 22 and the second high-pressure groove 23 is located near the end of the air intake groove 21, and the depth gradually decreases as they extend rearward. Finally, it is flush with the surface of the air intake surface 2; the depth of the end of the air intake groove 21 is greater than the maximum depth of the first high-pressure groove 22 and the second high-pressure groove 23; the air intake groove 21 is deepest near the outer edge of the air intake surface 2, with a depth of 9μm, and the depth of the end of the air intake groove 21 is 5.5μm. The depth of the air intake groove 21 gradually decreases from the outer edge of the air intake surface 2 inward; the distance from the end of the first high-pressure groove 22 to the central axis of the stationary ring body 1 is equal to the distance from the end of the second high-pressure groove 23 to the central axis of the stationary ring, so as to ensure that the stationary ring can generate uniform thrust around the air intake surface 2, and make the thrust relatively concentrated in the central annular region of the air intake surface 2. The other parts of this embodiment are the same as those of the above embodiment, and will not be repeated here.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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 low-speed dry gas sealing groove structure for reactors, characterized in that, The dry gas sealing component includes a stationary ring body, which is an annular structure. The stationary ring body includes a connecting surface and an air inlet surface. The connecting surface is a stepped structure and is used to connect to the stationary ring seat. Several pressure grooves are arranged circumferentially on the air inlet surface, and the pressure grooves are arranged in a ring array on the air inlet surface. The air inlet surface is located close to the rotating ring. When the rotating ring rotates, airflow enters the pressure grooves. The pressure in the pressure grooves increases, pushing the rotating ring away and creating a gap between the rotating ring and the stationary ring body.

2. The low-speed dry gas sealing groove structure for reactors as described in claim 1, characterized in that, The pressure groove is inclined clockwise from the outer edge of the air inlet surface to the inner edge.

3. The low-speed dry gas sealing groove structure for reactors as described in claim 2, characterized in that, The pressure groove includes an air intake groove and a high-pressure groove group. The air intake groove is connected to the outer edge of the air intake surface, and the high-pressure groove group is located at the end of the air intake groove and is connected to the air intake groove.

4. The low-speed dry gas sealing groove structure for reactors as described in claim 3, characterized in that, The high-pressure trough group includes a first high-pressure trough and a second high-pressure trough. The first high-pressure trough is located near the outer edge of the air intake surface, and the second high-pressure trough is located near the inner edge of the air intake surface. The first high-pressure trough and the second high-pressure trough are spaced apart.

5. The low-speed dry gas sealing groove structure for reactors as described in claim 4, characterized in that, The first high-pressure tank and the second high-pressure tank have the same maximum depth, and the end depth of the air intake tank is greater than the maximum depth of the first high-pressure tank and the second high-pressure tank.

6. The low-speed dry gas sealing groove structure for reactors as described in claim 5, characterized in that, The depth of the end of the air intake groove is 9μm-5.5μm.

7. The low-speed dry gas sealing groove structure for reactors as described in claim 5, characterized in that, The maximum depth of the first high-pressure tank and the second high-pressure tank is 4μm-5μm.

8. The low-speed dry gas sealing groove structure for reactors as described in claim 4, characterized in that, The distance from the end of the first high-pressure tank to the central axis of the stationary ring body is equal to the distance from the end of the second high-pressure tank to the central axis of the stationary ring.

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