Rotary sealing structure capable of achieving two-way sealing

Abstract

A rotary sealing mechanism is arranged in a fixed mounting ring, the rotary sealing mechanism comprises the fixed mounting ring, a rotor is arranged at one end of the fixed mounting ring, the rotor is fixed to the outer wall of a rotary shaft, an insertion groove is formed in the top of the end, close to the fixed mounting ring, of the rotor, and the insertion groove is communicated with the fixed mounting ring. A second cavity is formed in the inner wall, close to the rotating shaft, of the rotor, a second sealing ring is installed in the second cavity, and a first cavity is formed by the bottom of the end, close to the rotor, of the fixed mounting ring and the bottom of the end, close to the rotor, of the fixed mounting ring; and a first sealing ring is mounted in the first cavity. The installation space of the rotary sealing mechanism is reduced, the bidirectional sealing effect is achieved, good sealing performance is kept when the rotary shaft rotates, the sealing performance of equipment is enhanced, and environmental pollution and potential safety hazards caused by leakage are reduced.

Description

Technical Field

[0001] This utility model relates to the field of rotary sealing technology, and in particular to a rotary sealing structure capable of bidirectional sealing. Background Technology

[0002] Rotary seals are common components in mechanical parts and are widely used in various operating mechanical structures. With advancements in modern mechanical design and manufacturing technology, the functions of various mechanical structures are gradually increasing while their size is decreasing. This places higher demands on rotary seals, as the installation space for rotary seals is significantly reduced, while requirements for their service life and operating temperature are relatively higher. In many applications, rotary seals are required to achieve bidirectional sealing within small installation dimensions, sealing liquid on one side and gas on the other. The rapid development of mechanical structures urgently necessitates the emergence of innovative rotary seal structures that are small in size and offer high sealing performance.

[0003] Achieving bidirectional sealing is difficult in small installation spaces, such as sealing lubricating oil on one side and gas on the other. Due to the structural limitations of the rubber sealing lip, traditional rubber rotary seals are usually unidirectional. To achieve bidirectional sealing, an additional rubber sealing lip must be arranged in the opposite direction, which greatly increases the installation space required for the seal. In applications with limited space but requiring bidirectional rotary sealing, traditional rubber rotary seals are difficult to use. Therefore, there is an urgent need to solve this problem. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rotary sealing structure that can provide bidirectional sealing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bidirectional sealing rotary sealing structure includes a rotating shaft, the outer wall of which is provided with a fixed mounting ring, one end of which seals oil and the other end of which seals gas, and the fixed mounting ring is provided with a rotary sealing mechanism inside.

[0007] The rotary sealing mechanism includes a fixed mounting ring, one end of which is provided with a rotor, which is fixed to the outer wall of the rotating shaft. A slot is provided at the top of the end of the rotor near the fixed mounting ring, and an insert plate is fixed at the end of the fixed mounting ring near the rotor, which is adapted to the slot. A second cavity is provided on the inner wall of the rotor near the rotating shaft, and a second sealing ring is installed inside the second cavity. The bottom of the end of the fixed mounting ring near the rotor forms a first cavity with it, and a first sealing ring is installed inside the first cavity.

[0008] Preferably, one end of the rotor forms a second guide groove with the inner wall of the fixed mounting ring, and the outer wall of the insert plate is provided with a guide mechanism to facilitate rotor rotation.

[0009] Preferably, the guiding mechanism includes mounting slots on both sides of the outer wall of the insert plate. A fixing block is provided inside the mounting slot. A ball is rotatably connected to the fixing block near the outer wall of the rotor. A guide groove is provided around the top of the inner wall of the slot. The ball is adapted to the guide groove and slides inside it. The ball can roll in the guide groove, thereby guiding the rotor and reducing friction when it rotates.

[0010] Preferably, one end of a spring is fixed to the side of the fixing block away from the rotor, and the other end of the spring is fixedly connected to one side of the inner wall of the mounting groove.

[0011] Preferably, the fixed mounting ring has a first guide groove at one end inside the machine. When oil enters the interior of the fixed mounting ring through the gap of the first guide groove, the first guide groove will guide the oil.

[0012] Preferably, a connecting oil drain hole is provided at one end of the bottom of the first guide channel. When oil flows into the oil drain hole, the oil will be discharged.

[0013] Preferably, a water guide groove is provided at the bottom of the outer wall of the insert plate near the rotor. If the gas forms water, the water will be driven to the water guide groove and then guided out when the rotor rotates.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Due to the adoption of a rotary sealing mechanism, the first sealing ring seals the gas. The first sealing ring is installed at the connection between the fixed mounting ring and the rotor to further seal the gas. When the gas enters the second guide groove, it will condense into water droplets due to the temperature. When the rotor rotates, it will rotate the water droplets into the water guide groove and then discharge the water. When the oil enters the first guide groove, it will move to the bottom of the inner wall of the first guide groove due to the rotation of the rotating shaft and then be discharged from the oil leakage hole. This reduces the installation space of the rotary sealing mechanism, achieves a two-way sealing effect, maintains good sealing performance when the rotating shaft rotates, enhances the sealing performance of the equipment, and reduces environmental pollution and safety hazards caused by leakage.

[0016] 2. Due to the adoption of a guiding mechanism, when the rotor rotates, the balls will be located in the guide groove. The spring will compress the balls to keep them in contact with the inner wall of the guide groove, thereby achieving a guiding effect on the rotor. This can reduce direct friction between the rotor and other components, thereby reducing wear and extending the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional partial structural diagram of a rotary sealing structure capable of bidirectional sealing proposed in this utility model;

[0018] Figure 2 This is a partial sectional view of the side of a rotary sealing structure capable of bidirectional sealing proposed in this utility model.

[0019] Figure 3 This is a partial structural diagram of the guide mechanism for a bidirectional sealing rotary sealing structure proposed in this utility model.

[0020] Figure 4 This is a partial structural diagram of the rotary sealing mechanism of a rotary sealing structure capable of bidirectional sealing proposed in this utility model.

[0021] Figure 5 This is a schematic diagram of the second part of the rotary sealing mechanism of the rotary sealing structure that can be sealed bidirectionally, as proposed in this utility model.

[0022] In the diagram: 1. Rotating shaft; 2. Fixed mounting ring; 200. Oil leakage hole; 201. First guide groove; 202. First cavity; 203. First sealing ring; 204. Insert plate; 205. Mounting groove; 206. Fixing block; 207. Ball bearing; 208. Spring; 209. Water guide groove; 3. Rotor; 300. Slot; 3001. Guide groove; 301. Second cavity; 302. Second sealing ring; 303. Second guide groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-5 A rotary sealing structure capable of bidirectional sealing includes a rotary shaft 1, a fixed mounting ring 2 on the outer wall of the rotary shaft 1, one end of the fixed mounting ring 2 is for sealing oil, the other end of the fixed mounting ring 2 is for sealing gas, and a rotary sealing mechanism is provided inside the fixed mounting ring 2.

[0025] The rotary sealing mechanism includes a fixed mounting ring 2, one end of which is provided with a rotor 3, which is fixed to the outer wall of the rotating shaft 1. A slot 300 is provided at the top of the end of the rotor 3 near the fixed mounting ring 2, and an insert plate 204 is fixed at the end of the fixed mounting ring 2 near the rotor 3, which is adapted to the slot 300. A second cavity 301 is provided on the inner wall of the rotor 3 near the rotating shaft 1, and a second sealing ring 302 is installed inside the second cavity 301. The second sealing ring 302 can seal the gas and prevent the gas from entering the machine. The bottom of the end of the fixed mounting ring 2 near the rotor 3 forms a first cavity 202 with it, and a first sealing ring 203 is installed inside the first cavity 202. The first sealing ring 203 can seal the oil.

[0026] In this utility model, one end of the rotor 3 forms a second guide groove 303 with the inner wall of the fixed mounting ring 2. The second guide groove 303 can guide some external water vapor. The outer wall of the insert plate 204 is provided with a guide mechanism to facilitate the rotation of the rotor 3.

[0027] In this utility model, the guiding mechanism includes mounting grooves 205 on both sides of the outer wall of the insert plate 204. The mounting groove 205 is provided with a fixing block 206. The fixing block 206 is rotatably connected to the outer wall of the rotor 3. The top of the inner wall of the slot 300 is provided with a guide groove 3001. The ball 207 is adapted to the guide groove 3001 and slides inside it. The ball 207 can roll in the guide groove 3001, thereby guiding the rotor 3 and reducing friction when it rotates.

[0028] In this utility model, one end of a spring 208 is fixed to the side of the fixing block 206 away from the rotor 3, and the other end of the spring 208 is fixedly connected to one side of the inner wall of the mounting groove 205.

[0029] In this utility model, the fixed mounting ring 2 is provided with a first guide groove 201 at one end inside the machine. When oil enters the interior of the fixed mounting ring 2 through the gap of the first guide groove 201, the first guide groove 201 will guide the oil.

[0030] In this utility model, a communicating oil leakage hole 200 is provided at one end of the bottom of the first guide groove 201. When the oil flows into the oil leakage hole 200, the oil will be discharged.

[0031] In this invention, a water guide groove 209 is provided at the bottom of the outer wall of the insert plate 204 near the rotor 3. When the gas forms water, the rotor 3 will drive the water to the water guide groove 209 when it rotates, and then guide it out.

[0032] Working principle: In use, first, fix the mounting ring 2 in place. Then, align the slot 300 at one end of the rotor 3 with the insert plate 204 and insert it. At this time, the insert plate 204 will drive the ball 207 to move and press against one end of the slot 300. The ball 207 will press against the fixing block 206, which will press against the spring 208, compressing it into the mounting groove 205. When the ball 207 is in the guide groove 3001, the spring 208 will drive the ball 207 to return to its original position in the guide groove 3001. After installation, fix the rotor 3 to the outer wall of one end of the rotating shaft 1. At this time, the second sealing ring 302 will seal the gas to prevent gas from entering the interior of the machine. Then, the first sealing ring 203 will be fixed in place. The connection between the fixed mounting ring 2 and the rotor 3 can be further sealed. When the rotating shaft 1 rotates, it will drive the rotor 3 to rotate. Then the ball bearing 207 will guide the rotor 3 to make its rotation more stable. When the external gas enters the second guide groove 303, it will turn into water due to the temperature and fall into the second guide groove 303. When the rotor 3 rotates, it will rotate the water to the water guide groove 209 and discharge the water. When the other end of the rotating shaft 1 rotates, it may carry oil into the interior of the first guide groove 201 and drip onto the outer wall of the rotating shaft 1. Then, with rotation, it will fall into the bottom of the interior of the first guide groove 201 for accumulation and then be discharged from the oil leakage hole 200, thus achieving the effect of rotational sealing of oil and gas.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rotary sealing structure capable of bidirectional sealing, comprising a rotating shaft (1), characterized in that, The outer wall of the rotating shaft (1) is provided with a fixed mounting ring (2), and one end of the fixed mounting ring (2) is for sealing oil, the other end of the fixed mounting ring (2) is for sealing gas, and the interior of the fixed mounting ring (2) is provided with a rotating sealing mechanism. The rotary sealing mechanism includes a fixed mounting ring (2), one end of which is provided with a rotor (3), and the rotor (3) is fixed to the outer wall of the rotating shaft (1). The top of the rotor (3) near the fixed mounting ring (2) is provided with a slot (300), and the end of the fixed mounting ring (2) near the rotor (3) is fixed with a plate (204), and the plate (204) is adapted to the slot (300). The inner wall of the rotor (3) near the rotating shaft (1) is provided with a second cavity (301), and a second sealing ring (302) is installed inside the second cavity (301). The bottom of the end of the fixed mounting ring (2) near the rotor (3) forms a first cavity (202), and a first sealing ring (203) is installed inside the first cavity (202).

2. The rotary sealing structure capable of bidirectional sealing according to claim 1, characterized in that, One end of the rotor (3) forms a second guide groove (303) with the inner wall of the fixed mounting ring (2), and the outer wall of the insert plate (204) is provided with a guide mechanism to facilitate the rotation of the rotor (3).

3. The bidirectional sealing rotary sealing structure according to claim 2, characterized in that, The guiding mechanism includes mounting grooves (205) on both sides of the outer wall of the insert plate (204). The mounting groove (205) is provided with a fixing block (206). The fixing block (206) is rotatably connected to a ball (207) near the outer wall of the rotor (3). The top of the inner wall of the slot (300) is provided with a guide groove (3001). The ball (207) is adapted to the guide groove (3001) and slides inside it.

4. The bidirectional sealing rotary sealing structure according to claim 3, characterized in that, One end of a spring (208) is fixed to the side of the fixing block (206) away from the rotor (3), and the other end of the spring (208) is fixedly connected to one side of the inner wall of the mounting groove (205).

5. The rotary sealing structure capable of bidirectional sealing according to claim 1, characterized in that, The fixed mounting ring (2) has a first guide groove (201) at one end inside the machine.

6. The bidirectional sealing rotary sealing structure according to claim 5, characterized in that, The bottom end of the first guide channel (201) is provided with a communicating oil leakage hole (200).

7. The rotary sealing structure capable of bidirectional sealing according to claim 1, characterized in that, A water guide groove (209) is provided on the bottom of the outer wall of the insert plate (204) near the rotor (3).

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