A wear-resistant straight-acting rotary dynamic seal structure

Abstract

The utility model discloses a kind of wear-resistant direct-acting rotary dynamic sealing structures, belong to mechanical sealing technical field, the structure includes transmission rod and seal shell, wear-resistant mechanism is equipped in seal shell, wear-resistant mechanism includes the roller that will sliding friction change into rolling friction, the buffer assembly for absorbing axial impact and the sealing ring that realizes sealing.The utility model is combined through roller and buffer assembly, effectively solve the problem that sealing structure is seriously worn and poor impact resistance in prior art, with wear resistance, stable operation, high sealing reliability, long service life Advantage.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a wear-resistant direct-acting rotary dynamic seal structure. Background Technology

[0002] In modern mechanical equipment, such as pumps, mixers, and compressors, it is common for a rotating shaft to pass through the equipment housing. In order to prevent leakage of fluid media inside the housing or intrusion of external impurities, an effective sealing device, namely a rotary dynamic seal structure, must be installed between the rotating shaft and the stationary housing.

[0003] Existing rotary dynamic seal structures typically use elastic elements such as sealing rings or packings to directly press against the surface of the rotating shaft. Sealing is achieved through interference fit and sliding contact between the elastic element and the rotating shaft. However, when the rotating shaft rotates at high speed for a long time, severe sliding friction will occur between the sealing element and the surface of the rotating shaft. This continuous friction not only generates a lot of heat, accelerating the wear of the sealing element and the rotating shaft itself, but also leads to a gradual decline in sealing performance, eventually causing failure due to wear. As a result, the reliability of the entire sealing structure is low and its service life is short.

[0004] Furthermore, in actual working conditions, the transmission system is often accompanied by axial vibration or impact. Traditional sealing structures are mostly rigid or semi-rigid contacts, lacking an effective buffering mechanism. When encountering axial impact, the instantaneous stress will directly act on the fragile sealing surface, which can easily lead to damage to the sealing surface or instantaneous leakage, thereby seriously affecting the stability of equipment operation.

[0005] Therefore, this utility model proposes a wear-resistant direct-acting rotary dynamic seal structure to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of severe wear, short service life, and poor sealing stability under axial impact caused by sliding friction in the existing rotary dynamic seal structure, this utility model aims to provide a wear-resistant direct-acting rotary dynamic seal structure with improved structure that can effectively solve the above problems.

[0007] To achieve the above objectives, this utility model provides a wear-resistant direct-acting rotary dynamic seal structure, comprising: a transmission rod and a sealing shell covering the outside of the transmission rod; the sealing shell also includes a connecting frame, multiple rollers, a buffer assembly, and a sealing ring.

[0008] The connecting frame is fixed to the transmission rod, and multiple rollers are rotatably installed on the inner side of the connecting frame.

[0009] Furthermore, the buffer assembly and the roller are coaxially arranged and functionally related, and the sealing ring is located inside the buffer assembly. Through this combination, they together form a wear-resistant, buffering, and dynamic seal for the transmission rod.

[0010] Preferably, the buffer assembly includes a connecting ring, connecting pipes respectively connected to both sides of the connecting ring, and a spring disposed at the junction of the connecting ring and the connecting pipes.

[0011] Preferably, one of the connecting pipes has a movable groove, and the other connecting pipe has a screw rotatably mounted on it, with the end of the screw slidingly engaged in the movable groove.

[0012] Preferably, the wear-resistant mechanism further includes a retaining ring, which is sleeved on the outside of the plurality of rollers; and the outer periphery of the sealing shell is fixed with a connecting hole.

[0013] Preferably, the wear-resistant direct-acting rotary dynamic seal structure further includes a connecting mechanism, which is located at the other end of the transmission rod. The connecting mechanism includes a flange and a fixed plate fixed to the transmission rod.

[0014] Preferably, the flange is fixed by bolts around its perimeter, and a spring is installed at the connection between the flange and the fixed plate.

[0015] Preferably, the flange and the fixed plate are connected by a through-hole fixing via a pin.

[0016] Preferably, a hollow screw is fixed to one side of the fixed plate, and the transmission rod passes through the screw and is rotatably connected to the bearing.

[0017] Preferably, the connecting mechanism further includes a gasket, which is disposed at the connection between the bearing and the transmission rod to reduce wear.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model, by setting up a wear-resistant mechanism with multiple built-in rollers, transforms the sliding friction of the transmission rod during rotation into rolling friction, solving the problem of severe wear and short lifespan caused by sliding friction in the prior art, and achieving the technical effect of reducing friction loss and extending the overall service life of the sealing structure.

[0020] 2. This utility model solves the problem of unstable performance and easy damage of the sealing structure under axial impact or vibration in the prior art by integrating a buffer component containing a spring and a limiting sliding structure into the wear-resistant mechanism, and achieves the technical effect of effective buffering and shock absorption and ensuring sealing reliability under dynamic working conditions.

[0021] 3. This utility model, by setting up a connection mechanism including a flange, an elastic compensating spring and a pin, solves the problems of unstable connection caused by assembly errors or equipment vibration in the prior art, as well as the difficulty of disassembly and maintenance, and achieves the technical effect of improving connection reliability and adaptability and making the structure easy to maintain. Attached Figure Description

[0022] Figure 1 This is a perspective view of a wear-resistant direct-acting rotary dynamic seal structure proposed in this utility model;

[0023] Figure 2 This is a partial structural schematic diagram of a wear-resistant direct-acting rotary dynamic seal structure proposed in this utility model;

[0024] Figure 3 This is a structural exploded view of a wear-resistant direct-acting rotary dynamic seal structure proposed in this utility model;

[0025] Figure 4 This is a partial structural diagram of a wear-resistant direct-acting rotary dynamic seal structure proposed in this utility model.

[0026] Legend:

[0027] 1. Transmission rod; 2. Wear-resistant mechanism; 201. Sealing shell; 202. Connecting hole; 203. Fixing ring; 204. Connecting frame; 205. Roller; 206. Buffer assembly; 2061. Connecting ring; 2062. Connecting pipe; 2063. Spring 1; 2064. Moving groove; 2065. Screw 1; 2066. Sealing ring; 3. Connecting mechanism; 301. Flange; 302. Bolt; 303. Pin; 304. Fixing plate; 305. Spring 2; 306. Screw 2; 307. Bearing; 308. Gasket. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 4 This utility model provides a wear-resistant direct-acting rotary dynamic seal structure, which aims to solve the problems of severe wear during long-term operation and poor sealing stability under axial impact in the existing rotary dynamic seal structure.

[0031] like Figures 1 to 4 As shown, a wear-resistant direct-acting rotary dynamic seal structure includes a transmission rod 1, a wear-resistant mechanism 2 disposed outside the transmission rod 1, and a connecting mechanism 3 fixedly connected to one end of the transmission rod 1. The transmission rod 1 serves as the core power component for transmitting rotary motion. The wear-resistant mechanism 2 covers the outside of the transmission rod 1 to provide wear resistance, buffering, and dynamic sealing. The connecting mechanism 3 is used to fix the entire device to external equipment.

[0032] To solve the above-mentioned technical problems, the core of the technical solution of this embodiment lies in the fact that the wear-resistant mechanism 2 integrates a rolling structure for reducing rotational friction and a buffer structure for absorbing axial impact.

[0033] Please refer to the following carefully. Figure 2 and Figure 3 The core structure of the wear-resistant mechanism 2 will be described in detail below:

[0034] The wear-resistant mechanism 2 includes a sealing shell 201 covering the outside of the transmission rod 1. A connecting hole 202 is fixed to the outer periphery of the sealing shell 201. A connecting frame 204, fixed to the transmission rod 1, is disposed inside the sealing shell 201. Multiple rollers 205 are rotatably mounted on the inner side of the connecting frame 204. A fixing ring 203 for radial limiting is sleeved on the outer side of the multiple rollers 205. The wear-resistant mechanism 2 also includes a buffer assembly 206. The buffer assembly 206 is coaxially arranged with the rollers 205 and has a functional relationship with them. The buffer assembly 206 includes a connecting ring 2061 in the middle and two connecting pipes 2062 respectively fixedly connected to both sides of the connecting ring 2061. The connection between the connecting ring 2061 and each connecting pipe 2062 is achieved through multiple springs. Spring 2063 provides elastic connection. One connecting tube 2062 has a moving groove 2064, and a screw 2065 is rotatably mounted on the other connecting tube 2062. The end of the screw 2065 slides within the moving groove 2064. This structure allows the two connecting tubes 2062 to axially expand and contract within a limited range under the action of spring 2063. Each connecting tube 2062 has a sealing ring 2066 installed inside. The sealing ring 2066 is used to achieve dynamic sealing of the transmission rod 1. The roller 205 converts the sliding friction of the transmission rod 1 during rotation into rolling friction, while the buffer assembly 206 can absorb axial impact and vibration. The combination of the two achieves the functions of wear resistance and direct motion buffering.

[0035] Based on the above embodiments, in order to further improve the stability and reliability of the connection and facilitate maintenance, the connection mechanism 3 of this utility model adopts the following preferred structural scheme:

[0036] Please refer to the following carefully. Figure 2 and Figure 4The other end of the transmission rod 1 is fixedly connected to a connecting mechanism 3. The connecting mechanism 3 includes a fixed plate 304 and a flange 301 fixedly connected to the transmission rod 1. The flange 301 has through holes around its perimeter for bolts 302 to pass through, which are used to fix the entire device to an external device. A spring 305 is provided between the flange 301 and the fixed plate 304. The flange 301 is passed through and fixed inside the fixed plate 304 by a pin 303. A hollow screw 306 is fixed on the other side of the fixed plate 304. The transmission rod 1 passes through the screw 306 and is rotatably connected to the bearing 307. A gasket 308 is also provided at the connection between the bearing 307 and the transmission rod 1.

[0037] Working principle: The transmission rod 1 is used to achieve structural transmission. The outer wall of the transmission rod 1 is equipped with a wear-resistant structural mechanism 2 that can operate for a long time to reduce wear between structures. The sealing shell 201 has connection holes 202 around its perimeter for easy connection, ensuring the adaptability of the transmission rod 1 structural connection. To prevent excessive internal friction coefficient, a buffer assembly 206 is connected. Multiple rollers 205, which are equidistantly rotated on the inner side of the connecting frame 204 fixed inside the transmission rod 1, are connected to the left buffer assembly 206. A gap is reserved between the two to ensure rotational lubrication while buffering structural pressure. To prevent the rollers 205 from shaking and shifting during rotation, an outer... A fixed ring 203 provides a limiting position. The middle of the buffer assembly 206 is connected to the connecting pipes 2062 on both sides via a connecting ring 2061. Multiple springs 2063 are fixed at the connection points between the connecting ring 2061 and the connecting pipe 2062 to reduce collisions and friction between the structures. The left connecting pipe 2062 has two moving grooves 2064 at the front and back. The right connecting pipe 2062 has screws 2065 rotating at the front and back. The screws 2065 are fixed inside the moving grooves 2064 to limit and connect the structures, preventing excessive displacement between them. Sealing rings 2066 are installed inside the connecting pipes 2062 to ensure the sealing of the internal structure.

[0038] To increase the adaptability of the structural connection, the right end of the transmission rod 1 is equipped with a connection mechanism 3 for easy fixing. The flange 301 ensures the connection, while the bolts 302 around it increase the structural stability. A spring 305 is installed at the connection between the flange 301 and the fixed plate 304 fixed on the right side of the transmission rod 1 to compensate for assembly errors and vibrations and maintain the stability of the connection. The flange 301 is fixed inside the fixed plate 304 through the pin 303 for easy maintenance and disassembly. A hollow screw 306 is fixed on the other side of the fixed plate 304 to facilitate the connection of the bearing 307 through the transmission rod 1. The gasket 308 reduces the wear of the connecting parts and the transmission rod 1 and increases the structural strength.

Claims

1. A wear-resistant direct-acting rotary dynamic seal structure, comprising: Transmission rod (1); as well as A sealing shell (201) covering the outside of the transmission rod (1); Its features are, The sealing shell (201) is provided with a wear-resistant mechanism (2), which includes: The connecting frame (204) is fixed to the transmission rod (1); Multiple rollers (205) are rotatably mounted on the inner side of the connecting frame (204); Buffer assembly (206), which is coaxially arranged with and functionally associated with the roller (205), is used to buffer axial force; and A sealing ring (2066) is disposed inside the buffer assembly (206) to achieve dynamic sealing of the transmission rod (1).

2. The wear-resistant direct-acting rotary dynamic seal structure according to claim 1, characterized in that, The buffer assembly (206) includes a connecting ring (2061), connecting pipes (2062) respectively connected to both sides of the connecting ring (2061), and a spring (2063) disposed at the junction of the connecting ring (2061) and the connecting pipe (2062).

3. The wear-resistant direct-acting rotary dynamic seal structure according to claim 2, characterized in that, One of the connecting pipes (2062) has a movable groove (2064), and the other connecting pipe (2062) has a screw (2065) rotatably mounted on it, with the end of the screw (2065) slidingly engaged in the movable groove (2064).

4. The wear-resistant direct-acting rotary dynamic seal structure according to claim 1, characterized in that, The wear-resistant mechanism (2) further includes a retaining ring (203), which is sleeved on the outside of the plurality of rollers (205); and the outer periphery of the sealing shell (201) is fixed with a connecting hole (202).

5. The wear-resistant direct-acting rotary dynamic seal structure according to claim 1, characterized in that, The other end of the transmission rod (1) is also provided with a connecting mechanism (3), which includes a flange (301) and a fixing plate (304) fixed to the transmission rod (1).

6. The wear-resistant direct-acting rotary dynamic seal structure according to claim 5, characterized in that, The flange (301) is fixed by bolts (302) around its perimeter, and a spring (305) is installed at the connection between the flange (301) and the fixed plate (304).

7. The wear-resistant direct-acting rotary dynamic seal structure according to claim 6, characterized in that, The flange (301) is fixed inside the fixed plate (304) by a pin (303).

8. The wear-resistant direct-acting rotary dynamic seal structure according to claim 5, characterized in that, A hollow screw (306) is also fixed on one side of the fixed plate (304), and the transmission rod (1) passes through the screw (306) and is connected to the bearing (307).

9. A wear-resistant direct-acting rotary dynamic seal structure according to claim 8, characterized in that, The connecting mechanism (3) is also provided with a gasket (308), which is located at the connection between the bearing (307) and the transmission rod (1).

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