Efficient sealing structure of steam compressor

Abstract

The utility model discloses an efficient sealing structure of a steam compressor, which relates to the field of sealing structures and comprises a mounting ring, a first labyrinth groove is arranged on the inner side of the mounting ring, a honeycomb ring is arranged inside the mounting ring, a corresponding second labyrinth groove is arranged on the outer side of the honeycomb ring, and the first labyrinth groove is meshed with the second labyrinth groove. According to the efficient sealing structure of the steam compressor, the first labyrinth groove, the second labyrinth groove, the impeller shaft and the honeycomb ring are in high-speed friction, a large amount of heat is generated, the friction force between the impeller shaft and the honeycomb ring can be increased when the impeller shaft is heated and expanded, and when the friction force is larger than the friction force between the honeycomb ring and the mounting ring, the sealing effect is good. And when the honeycomb ring is heated to expand during rotation, the friction force between the honeycomb ring and the mounting ring is smaller than the friction force between the honeycomb ring and the impeller shaft, and the impeller shaft rotates, so that the load of the impeller shaft can be reduced as much as possible.

Description

Technical Field

[0001] The utility model relates to the field of sealing structures, and particularly relates to an efficient sealing structure for a steam compressor. Background Technique

[0002] A steam compressor is a key device in a heat recovery system that improves the temperature and pressure of generated steam through compression. Therefore, the sealing performance at the position of the impeller connecting shaft is extremely important. The labyrinth seal structure and the honeycomb seal structure are two common sealing forms. Since the honeycomb structure can generate strong eddy currents and barriers, a large damping is formed to achieve the sealing effect of preventing the leakage of working medium, which is better than the labyrinth seal.

[0003] Chinese Patent with the patent number CN 202321066795.7 discloses a novel honeycomb seal structure, which realizes the sealing effect by setting an annular honeycomb support and a honeycomb ring. However, during the high-speed rotation of the rotor, a large amount of heat is generated by the friction between the rotor and the honeycomb ring. During this process, the pressure between the expanded rotor and the honeycomb ring becomes larger, the friction force becomes larger, and the load of the rotor increases. Content of the Utility Model

[0004] The main purpose of the utility model is to provide an efficient sealing structure for a steam compressor, which can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: an efficient sealing structure for a steam compressor, including an installation ring. A labyrinth groove one is opened inside the installation ring. A honeycomb ring is arranged inside the installation ring. A corresponding labyrinth groove two is opened on the outer side of the honeycomb ring. The labyrinth groove one and the labyrinth groove two are engaged.

[0006] The installation ring includes two semi-circular clamping rings. The honeycomb ring is divided into two semi-circular parts. Circular grooves are opened at both ends of the two clamping rings. The circular grooves at the adjacent ends of the two clamping rings are communicated and located at the same height.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] In the utility model, by setting the labyrinth groove one and the labyrinth groove two, when the impeller shaft and the honeycomb ring rub at high speed and generate a large amount of heat, the friction force between the impeller shaft and the honeycomb ring increases due to the thermal expansion of the impeller shaft. At this time, when the friction force is greater than the friction force between the honeycomb ring and the installation ring, the honeycomb ring will rotate with the impeller shaft. When the honeycomb ring rotates and expands due to heat, the friction force between the honeycomb ring and the installation ring is less than the friction force between the honeycomb ring and the impeller shaft, and the impeller shaft rotates by itself. In both cases, the load of the impeller shaft can be reduced as much as possible. Description of the Drawings

[0009] Figure 1 This is the overall structural schematic diagram of an efficient sealing structure of a steam compressor of the present utility model;

[0010] Figure 2 This is the partial structural schematic diagram of the position of the labyrinth groove one of an efficient sealing structure of a steam compressor of the present utility model.

[0011] In the figure: 1, labyrinth groove one; 2, honeycomb ring; 3, labyrinth groove two; 4, clamping ring; 5, circular groove. Specific embodiments

[0012] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0013] As Figure 1-2 shown, an efficient sealing structure of a steam compressor includes a mounting ring. A labyrinth groove one 1 is provided inside the mounting ring. As Figure 2 shown, a honeycomb ring 2 is arranged inside the mounting ring. The honeycomb ring 2 is in contact connection with the impeller shaft during installation. A corresponding labyrinth groove two 3 is provided on the outer side of the honeycomb ring 2. The labyrinth groove one 1 and the labyrinth groove two 3 are meshed, and the cooperation of the labyrinth groove one 1 and the labyrinth groove two 3 can ensure the sealing performance.

[0014] When the impeller rotates, whether the impeller shaft first rotates in contact with the honeycomb ring 2 or the honeycomb ring 2 rotates along with the impeller shaft, if the impeller shaft and the honeycomb ring 2 are in high-speed friction, a large amount of heat is generated. When the impeller shaft expands due to heat, the friction force between the impeller shaft and the honeycomb ring 2 increases. At this time, when the friction force is greater than the friction force between the honeycomb ring 2 and the mounting ring, the honeycomb ring 2 will rotate along with the impeller shaft. At this time, the load of the impeller shaft can be reduced as much as possible. When the honeycomb ring 2 rotates and expands due to heat, the friction force between the honeycomb ring 2 and the mounting ring is less than the friction force between the honeycomb ring 2 and the impeller shaft, and the impeller shaft rotates by itself.

[0015] The mounting ring includes two semi-circular clamping rings 4, which is convenient for installing the mounting ring. During use, it can be clamped at the corresponding position of the impeller shaft. The honeycomb ring 2 is divided into two semi-circular parts, which is convenient for installing the honeycomb ring 2 inside the clamping ring 4. Circular grooves 5 are provided at both ends of the two clamping rings 4. The circular grooves 5 at the adjacent ends of the two clamping rings 4 are communicated and located at the same height. When installing the clamping ring 4, it is directly fixed by bolts and nuts, which is not only firmly installed but also convenient to operate.

[0016] It should be noted that the present utility model is an efficient sealing structure for a steam compressor. When in use, it is clamped at the corresponding position of the impeller shaft and fixed by bolts and nuts. When the impeller rotates, if the impeller shaft rubs against the honeycomb ring 2 at a high speed, a large amount of heat is generated. As the impeller shaft expands due to heat, the frictional force between the impeller shaft and the honeycomb ring 2 increases. At this time, when the frictional force is greater than the frictional force between the honeycomb ring 2 and the mounting ring, the honeycomb ring 2 will rotate with the impeller shaft. At this time, the load on the impeller shaft can be reduced as much as possible. When the honeycomb ring 2 rotates and expands due to heat, the frictional force between the honeycomb ring 2 and the mounting ring is less than the frictional force between the honeycomb ring 2 and the impeller shaft, and the impeller shaft rotates by itself.

[0017] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A steam compressor high efficiency sealing structure, comprising a mounting ring, characterized in that: A comb tooth groove 1 (1) is provided on the inner side of the mounting ring, a honeycomb ring (2) is arranged inside the mounting ring, a corresponding comb tooth groove 2 (3) is provided on the outer side of the honeycomb ring (2), and the comb tooth groove 1 (1) and the comb tooth groove 2 (3) are meshed.

2. A steam compressor high-efficiency sealing structure according to claim 1, characterized in that: The mounting ring comprises two semi-annular clamping rings (4), the honeycomb ring (2) is divided into two semi-annular shapes, circular grooves (5) are provided at both ends of the two clamping rings (4), and the circular grooves (5) at adjacent ends of the two clamping rings (4) are connected and located at the same height.

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