A shaft end inflatable floating seal structure

Abstract

This patent relates to the technical field of sealing structures, specifically an inflatable floating sealing structure at the shaft end, including an air seal ring, an air seal seat, an air seal pressure plate, an air seal partition and two groups of floating air seal groups. An air seal chamber is formed between the air seal seat, the air seal pressure plate and the air seal ring. An air seal ring is provided with an air filling port connected to the air seal chamber, and the air filling port allows compressed air to flow into the air seal chamber. The air seal partition is fixed between the air seal seat and the air seal ring. One floating air seal group is fixed between the air seal seat and the air seal partition, and the other floating air seal group is fixed between the air seal ring and the air seal pressure plate. In this solution, the floating air seal group connected to the air seal seat plays the main sealing role. Part of the gas leaked after sealing is sealed again through the compressed gas passed through the air seal chamber; the floating air seal group connected to the air seal pressure plate plays a role in consolidating the seal, solving the problem that the existing compressor has poor sealing effect and the leaked gas is discharged into the air at will, causing personal injury and environmental pollution.

Description

Technical Field

[0001] The invention relates to the technical field of sealing structures, in particular to a shaft end inflatable floating sealing structure. Background Art

[0002] Gas compressors are often used to compress toxic, hazardous, flammable, and explosive gases. These conditions place extremely high demands on the compressor's sealing properties. Even a small amount of leakage into the air can cause serious consequences such as death or explosion. Conventional seals have a short lifespan and poor sealing performance, allowing leaked gas to be freely discharged into the air, causing personal injury and environmental pollution. Summary of the Invention

[0003] The present invention is intended to provide a shaft-end inflatable floating seal structure to solve the problems of poor sealing effect, random discharge of leaked gas into the air, causing personal injury and environmental pollution.

[0004] In order to achieve the above object, the basic scheme of the present invention is as follows:

[0005] An inflatable floating seal structure at the shaft end comprises an air seal ring, an air seal seat, an air seal pressure plate, an air seal partition and two groups of floating air seal groups. The air seal seat and the air seal pressure plate are respectively fixed at the two ends of the air seal ring. An air seal chamber is formed between the air seal seat, the air seal pressure plate and the air seal ring. The air seal ring is provided with an inflation port connected to the air seal chamber. The inflation port is connected to an inflation pipe. The inflation pipe passes compressed air into the air seal chamber. The air seal partition is fixed between the air seal seat and the air seal ring. One of the floating air seal groups is fixed between the air seal seat and the air seal partition, and the other floating air seal group is fixed between the air seal ring and the air seal pressure plate.

[0006] Furthermore, the floating air seal group includes a spacer, an asbestos rubber plate and bolts, and the spacer and the asbestos rubber plate are connected by bolts.

[0007] Furthermore, the number of the spacers and the number of the asbestos rubber plates are both two, and the two spacers and the two asbestos rubber plates are alternately fixedly connected.

[0008] Furthermore, the gas seal seat, the gas seal ring and the gas seal pressure plate are fixedly connected by bolts.

[0009] Furthermore, a gap is provided between the outer circumferential sidewall of the floating gas seal group and the inner circumferential sidewalls of the gas seal seat and the gas seal ring.

[0010] The beneficial effects of this solution are as follows: (1) In this solution, the gas seal seat is fixed to the side panel of the casing by bolts, the sealing bodies of the two groups of floating gas seal groups hold the main shaft of the compressor tightly, and are fixed together with the gas seal seat by bolts through the gas seal partition, gas seal chamber, and gas seal pressure plate. The floating gas seal group connected to the gas seal seat plays the main sealing role, and part of the gas leaked after sealing is sealed again through the compressed gas passed through the gas seal chamber; at this time, a good sealing effect has basically been achieved, and the floating gas seal group connected to the gas seal pressure plate plays a role in consolidating the seal.

[0011] (2) When the compressor is operating at high temperature, the expansion of the compressor shell will be very large. The gap left between the outer circular side wall of the floating gas seal group and the inner circular side wall of the gas seal seat and the gas seal ring can ensure that the expansion of the shell will not be disturbed and will not damage the seal body. It can effectively solve the sealing problem during high temperature expansion and realize the self-regulating effect of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0013] Figure 2 Schematic diagram of the structure of the gas sealing ring in an embodiment of the present invention;

[0014] Figure 3 for Figure 2 Cross-sectional view of AA;

[0015] Figure 4 Schematic diagram of the structure of the gas seal seat in an embodiment of the present invention;

[0016] Figure 5 Schematic diagram of the structure of the floating air seal group in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The reference numerals in the drawings of the specification include: air seal ring 1, air seal seat 2, air seal pressure plate 3, air seal partition 4, floating air seal group 5, air seal chamber 6, inflation port 7, spacer 8, asbestos rubber sheet 9, casing side panel 10, and main shaft 11.

[0019] Example

[0020] Basically as attached Figure 1 、 Figure 4As shown: A shaft end inflatable floating seal structure, including a gas seal ring 1, a gas seal seat 2, a gas seal pressure plate 3, a gas seal partition 4 and two sets of floating gas seal groups 5. The gas seal seat 2 and the gas seal pressure plate 3 are respectively fixed at both ends of the gas seal ring 1. The gas seal seat 2, the gas seal ring 1 and the gas seal pressure plate 3 are fixedly connected by bolts. A gas seal chamber 6 is formed between the gas seal seat 2, the gas seal pressure plate 3 and the gas seal ring 1. Figure 2 、 Figure 3 As shown, the air seal ring 1 is provided with an air filling port 7 communicating with the air seal chamber 6, and the air filling port 7 is connected to an air filling pipe, which passes compressed air into the air seal chamber 6. The air seal partition 4 is fixed between the air seal seat 2 and the air seal ring 1, a floating air seal group 5 is fixed between the air seal seat 2 and the air seal partition 4, and another floating air seal group 5 is fixed between the air seal ring 1 and the air seal pressure plate 3. Figure 5 As shown, each floating air seal assembly 5 includes two spacers 8, two asbestos rubber sheets 9, and several bolts. The two spacers 8 and two asbestos rubber sheets 9 are arranged alternately and connected by bolts. A gap is provided between the outer circumferential sidewall of the floating air seal assembly 5 and the inner circumferential sidewalls of the air seal seat 2 and the air seal ring 1.

[0021] The specific implementation process is as follows: the gas seal seat 2 is fixed to the side panel 10 of the compressor casing by bolts, the sealing bodies of the two groups of floating gas seal groups 5 hold the main shaft 11 of the compressor tightly, and are fixed together with the gas seal seat 2 by bolts through the gas seal partition 4, the gas seal chamber 6, and the gas seal pressure plate 3. The floating gas seal group 5 connected to the gas seal seat 2 plays the main sealing role. Part of the gas leaked after sealing is sealed again through the compressed gas passed through the gas seal chamber 6; at this time, it has basically played a good sealing role, and the floating gas seal group 5 connected to the gas seal pressure plate 3 plays a role in consolidating the seal. When the compressor is running under high temperature conditions, the expansion of the compressor shell will be very large. The gap left between the outer circular side wall of the floating gas seal group 5 and the inner circular side wall of the gas seal seat 2 and the gas seal ring 1 can ensure that the expansion of the shell will not be disturbed and will not damage the sealing body. It can effectively solve the sealing problem during high-temperature expansion and realize the self-regulating effect of the seal.

[0022] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0023] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A shaft end inflatable floating seal structure, characterized by: The cam is secured to the lip of the airtight container and is adapted to engage with the lip of the airtight container and to engage with the lip of the airtight container. The cam is secured to the lip of the airtight container and is adapted to engage with the lip of the airtight container. The cam is secured to the lip of the airtight container and is adapted to engage with the lip of the airtight container. There are two spacers and two asbestos rubber plates, and the two spacers and the two asbestos rubber plates are fixedly connected alternately; the air seal seat, the air seal ring and the air seal pressure plate are fixedly connected by bolts.

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