Sealing structure of expansion machine

Abstract

The utility model discloses a sealing structure of an expansion machine, which comprises a sleeve, an air cushion sealing component used for providing sealing is arranged in the sleeve, an inflating component is arranged on the outer surface of the sleeve, a mounting mechanism is arranged on the right side of the sleeve, and a sealing groove is arranged in the sleeve. The air cushion sealing assembly comprises an air cushion wear-resisting layer movably mounted in the sealing groove, an air cushion heat-resisting layer is fixedly connected to the inner wall of the air cushion wear-resisting layer, and a sealing air cushion is fixedly connected to the inner wall of the air cushion heat-resisting layer; air is extracted through the pump body and conveyed into the sealing air cushion through the communicating pipeline, the sealing clamping sleeve and the external pipeline, so that the sealing air cushion drives the air cushion heat-resisting layer and the air cushion wear-resisting layer to fill the sealing groove and the sealing groove, the sealing effect is achieved, the adaptability to temperature changes is high, and the sealing effect is good. And no matter in a high-temperature environment or a low-temperature environment, the stable sealing performance can be kept, so that the sealing device is suitable for various working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of expanders, in particular to a sealing structure of an expander. Background Art

[0002] An expander is a machine that uses the principle of outputting mechanical work to lower the temperature of the gas when compressed gas expands and reduces its pressure to obtain cooling capacity. Expanders are divided into two categories: piston expanders and turbine expanders according to their movement form and structure.

[0003] After searching, the utility model patent with patent announcement number CN203146036U discloses an expander impeller sealing structure, which relates to a turbine expander impeller sealing structure, including a sealing cover and a fixed disk, and connecting screws connecting the two, characterized in that: a gap is left between the fixed disk and the axial end face of the sealing cover, and the fixed disk is provided with a plurality of top screw holes that pass through the fixed disk to the axial end face of the sealing cover, and the top screws are arranged in the holes. The utility model has an expander impeller sealing structure, and when adjusting the top gap between the sealing cover and the impeller, it is not necessary to remove the sealing cover every time. After one assembly, continuous adjustment can be achieved, which saves time and effort, and the gap is guaranteed.

[0004] However, the above design still has some shortcomings. During use, the above design needs to continuously adjust the gap between the sealing cover and the impeller, and then use a sealing gasket to seal it, which is relatively cumbersome. Therefore, we propose a sealing structure of an expander to solve the above problem. Utility Model Content

[0005] The purpose of the utility model is to provide a sealing structure of an expander to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing structure of an expander, comprising a sleeve, an air cushion sealing assembly for providing sealing is arranged inside the sleeve, an inflation assembly is arranged on the outer surface of the sleeve, an installation mechanism is arranged on the right side of the sleeve, a sealing groove is arranged inside the sleeve, the air cushion sealing assembly includes an air cushion wear-resistant layer movably installed inside the sealing groove, an air cushion heat-resistant layer is fixedly connected to the inner wall of the air cushion wear-resistant layer, and a sealing air cushion is fixedly connected to the inner wall of the air cushion heat-resistant layer.

[0007] The outer surface of the sleeve is provided with a slot, the outer surface of the air cushion wear-resistant layer is fixedly connected with an external pipe, the top end of the external pipe passes through the slot and extends to the top of the slot, and the outer surface of the external pipe is provided with threads.

[0008] Wherein, a bearing is sleeved inside the sleeve, a sealing groove is provided on the outer surface of the bearing, and a connecting shaft is fixedly connected to the right end of the bearing.

[0009] Wherein, the mounting mechanism comprises a mounting sleeve sleeved on the outer surface of the connecting shaft, and the outer surface of the mounting sleeve is fixedly connected to the impeller.

[0010] Wherein, the outer surface of the mounting sleeve is threadedly connected with a fixing screw, and the bottom end of the fixing screw passes through the mounting sleeve and is threadedly connected with the outer surface of the connecting shaft.

[0011] Wherein, the inflation component includes a pump body fixedly connected to the outer surface of the sleeve, and the output end of the pump body is fixedly connected to a connecting pipe.

[0012] Wherein, one end of the communicating pipe away from the pump body is fixedly connected with a sealing sleeve, and the sealing sleeve is threadedly connected to the top end of the pump body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model draws air through the pump body, and transports it to the interior of the sealing air cushion through the connecting pipe, the sealing ferrule and the external pipe, so that the sealing air cushion drives the air cushion heat-resistant layer and the air cushion wear-resistant layer to fill the sealing groove and the sealing slot, thereby achieving the effect of sealing the air cushion, making it highly adaptable to temperature changes and able to maintain stable sealing performance regardless of high or low temperature environments, which makes it suitable for a variety of working conditions. The impeller can be quickly assembled and disassembled by providing the installation ferrule and the fixing screws. The structure of quickly disassembling the impeller makes the replacement or repair of the impeller faster and more convenient, which significantly reduces the maintenance time and workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a sealing structure of an expander of the utility model;

[0016] Figure 2 This is a top view of a sealing structure of an expander of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of a sealing structure of an expander of the utility model;

[0018] Figure 4 The utility model is a sealing structure of an expander Figure 3 A schematic diagram of the enlarged structure in the middle.

[0019] In the figure:

[0020] 1. Installation mechanism; 101. Installation sleeve; 102. Impeller; 103. Fixing screw;

[0021] 2. Inflatable assembly; 201. Pump body; 202. Connecting pipe; 203. Sealing sleeve; 204. External pipe;

[0022] 3. Air cushion sealing assembly; 301. Air cushion wear-resistant layer; 302. Air cushion heat-resistant layer; 303. Sealing air cushion;

[0023] 4. Sleeve; 5. Bearing; 6. Sealing groove; 7. Sealing groove; 8. Connecting shaft. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution: a sealing structure of an expander, including a sleeve 4, an air cushion sealing component 3 for providing sealing is arranged inside the sleeve 4, an inflation component 2 is arranged on the outer surface of the sleeve 4, a mounting mechanism 1 is arranged on the right side of the sleeve 4, a sealing groove 7 is arranged inside the sleeve 4, the air cushion sealing component 3 includes an air cushion wear-resistant layer 301 movably installed inside the sealing groove 7, an air cushion heat-resistant layer 302 is fixedly connected to the inner wall of the air cushion wear-resistant layer 301, and a sealing air cushion 303 is fixedly connected to the inner wall of the air cushion heat-resistant layer 302.

[0026] The outer surface of the sleeve 4 is provided with a slot, the outer surface of the air cushion wear-resistant layer 301 is fixedly connected with an external pipe 204, the top of the external pipe 204 passes through the slot and extends to the top of the slot, and the outer surface of the external pipe 204 is provided with threads.

[0027] The inner sleeve of the sleeve 4 is provided with a bearing 5 , and the outer surface of the bearing 5 is provided with a sealing groove 6 . The use of the sealing groove 6 helps to improve the sealing performance of the air cushion sealing assembly 3 . The right end of the bearing 5 is fixedly connected with a connecting shaft 8 .

[0028] The mounting mechanism 1 includes a mounting sleeve 101 sleeved on the outer surface of the connecting shaft 8 , and an impeller 102 is fixedly connected to the outer surface of the mounting sleeve 101 .

[0029] Among them, the outer surface of the mounting sleeve 101 is threadedly connected with a fixing screw 103, and the bottom end of the fixing screw 103 passes through the mounting sleeve 101 and is threadedly connected to the outer surface of the connecting shaft 8. Through the coordinated use of the fixing screw 103 and the mounting sleeve 101, the impeller 102 can be quickly disassembled and assembled, making regular inspection and cleaning easier, which helps to maintain the best operating state of the equipment.

[0030] The inflation component 2 includes a pump body 201 fixedly connected to the outer surface of the sleeve 4 , and the output end of the pump body 201 is fixedly connected to a connecting pipe 202 . The pump body 201 can provide a stable air source system to maintain the pressure of the sealing air cushion 303 .

[0031] One end of the communication pipe 202 away from the pump body 201 is fixedly connected with a sealing sleeve 203 , and the sealing sleeve 203 is threadedly connected to the top of the pump body 201 .

[0032] Working principle: When in use, first put the impeller 102 on the connecting shaft 8 through the installation sleeve 101, turn the fixing screw 103, tighten the impeller 102 and the installation sleeve 101 on the connecting shaft 8, start the pump body 201, and use the connecting pipe 202, the sealing sleeve 203 and the external pipe 204 to transport air to the inside of the sealing air cushion 303, so that the outermost air cushion wear-resistant layer 301 completely fills the sealing groove 6 and the sealing groove 7 and seals them. In a dynamic working environment, the sealing air cushion 303 can better adapt to relative movement and maintain the sealing effect.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for an expander, comprising a casing (4), Features: An air cushion sealing component (3) for providing sealing is arranged inside the sleeve (4), an inflation component (2) is arranged on the outer surface of the sleeve (4), a mounting mechanism (1) is arranged on the right side of the sleeve (4), a sealing groove (7) is arranged inside the sleeve (4), the air cushion sealing component (3) comprises an air cushion wear-resistant layer (301) movably installed inside the sealing groove (7), an air cushion heat-resistant layer (302) is fixedly connected to the inner wall of the air cushion wear-resistant layer (301), and a sealing air cushion (303) is fixedly connected to the inner wall of the air cushion heat-resistant layer (302).

2. The sealing structure of an expander according to claim 1, Features: The outer surface of the sleeve (4) is provided with a slot hole, the outer surface of the air cushion wear-resistant layer (301) is fixedly connected to an external pipe (204), the top end of the external pipe (204) passes through the slot hole and extends to the top of the slot hole, and the outer surface of the external pipe (204) is provided with a thread.

3. The sealing structure of an expander according to claim 2, Features: A bearing (5) is sleeved inside the sleeve (4), a sealing groove (6) is provided on the outer surface of the bearing (5), and a connecting shaft (8) is fixedly connected to the right end of the bearing (5).

4. The sealing structure of an expander according to claim 3, Features: The mounting mechanism (1) comprises a mounting sleeve (101) sleeved on the outer surface of the connecting shaft (8), and the outer surface of the mounting sleeve (101) is fixedly connected to an impeller (102).

5. The sealing structure of an expander according to claim 4, Features: The outer surface of the mounting sleeve (101) is threadedly connected with a fixing screw (103), and the bottom end of the fixing screw (103) passes through the mounting sleeve (101) and is threadedly connected to the outer surface of the connecting shaft (8).

6. The sealing structure of an expander according to claim 1, Features: The inflation assembly (2) comprises a pump body (201) fixedly connected to the outer surface of the sleeve (4), and the output end of the pump body (201) is fixedly connected to a connecting pipe (202).

7. The sealing structure of an expander according to claim 6, Features: One end of the communication pipe (202) away from the pump body (201) is fixedly connected to a sealing sleeve (203), and the sealing sleeve (203) is threadedly connected to the top end of the pump body (201).

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