Air-cooled return air connecting structure of air compressor

Abstract

The utility model discloses an air-cooled return air connecting structure of an air compressor, and relates to the technical field of air compressors. According to the air-cooled air return connecting structure of the air compressor, the improved air-cooled air return connecting pipeline-air return pipeline is connected to the bottom end of the volute body and the air inlet pipe, so that negative pressure generated at the air inlet of the air compressor is efficiently utilized, and high-temperature air leaked from the back of the volute impeller is directly exhausted; the air-cooled return air connecting structure has the advantages that the air-cooled return air connecting structure is stable and effective, direct contact between high-heat air and the thrust bearing when the high-heat air flows in the volute is avoided, and the service life of the air-cooled return air connecting structure is prolonged, so that the service life of the air-cooled return air connecting structure is prolonged, and the service life of the air-cooled return air connecting structure is prolonged. The effect of guaranteeing good heat dissipation of the bearing is achieved, and the service life of parts is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to an air-cooling return air connection structure for an air compressor. Background Art

[0002] The compressor is a component that increases the air pressure. The compressor impeller of a small supercharger generally integrates the guide wheel and the working impeller. There is a diffuser at the impeller outlet of the compressor to convert the kinetic energy obtained by the gas in the impeller into pressure as much as possible. Diffusers are divided into blade type and slot type. The outer casing of the compressor has an air inlet and outlet. The inlet is generally arranged axially, and the flow channel is slightly tapered to reduce the intake resistance. The outlet is generally designed to be a volute shape with a flow channel gradually expanding along the circumference, so that the high-speed airflow continues to expand there, thereby improving the overall efficiency of the supercharger.

[0003] At present, the traditional compressor structure is mainly composed of a leakage-cooled thrust bearing sealed on the back of the impeller. Due to the lack of a stable and effective air-cooled return air connection structure design, it is very easy to cause insufficient heat dissipation of the thrust bearing. The lack of a stable and effective air-cooled return air connection structure will cause the high-temperature gas to directly contact the thrust bearing when flowing in the volute, which can easily cause overheating of the bearing and is not conducive to extending the service life of the components.

[0004] In this regard, we proposed a compressor air-cooled return air connection structure to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an air-cooled return air connection structure for an air compressor, which solves the problem that the detection module cannot be adjusted, resulting in a reduced scope of application.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a compressor air-cooled return air connection structure, comprising

[0007] A compressor body and a mounting base, wherein the mounting base is fixedly mounted on the bottom of the compressor body;

[0008] A volute casing and an air inlet pipe, wherein the volute casing is mounted on a side end of the compressor body, and the air inlet pipe is mounted on a side end of the volute casing;

[0009] A volute impeller and a thrust bearing seat, wherein the thrust bearing seat is mounted inside the volute housing, and the volute impeller is mounted inside the air inlet pipe;

[0010] An outlet interface pipe, a steel belt type elastic clamp and a return air duct, wherein the number of the outlet interface pipes is two and they are respectively connected and installed with the volute casing and the air inlet pipe, and the end of the return air duct is sleeved on the surface of the outlet interface pipe and fastened by the steel belt type elastic clamp.

[0011] Preferably, a mounting buckle is provided on the surface of the outlet interface pipe, the side surface of the mounting buckle is in a regular hexagonal shape, and the volute casing and the air inlet pipe are connected by a split joint design.

[0012] Preferably, a fastening rubber lining ring is bonded to the end surface of the mounting buckle, and the fastening rubber lining ring is made of fluororubber.

[0013] Preferably, the fastening rubber lining ring is a circular structure, and the fastening rubber lining ring is sleeved on the surface of the outlet interface pipe.

[0014] Preferably, the two outlet interface pipes are overlapped with the volute casing and the air inlet pipe surface respectively through mounting buckles and fastening lining rubber rings.

[0015] Preferably, the surface of the outlet interface pipe is provided with threads, and the connection mode between the two outlet interface pipes and the volute casing and the air inlet pipe is threaded connection.

[0016] Beneficial Effects

[0017] The utility model provides a compressor air-cooling return air connection structure. Compared with the prior art, it has the following beneficial effects:

[0018] The compressor air-cooled return air connection structure connects the improved air-cooled return air connection pipe-the return air pipe to the bottom end of the volute casing and the air inlet pipe, thereby efficiently utilizing the negative pressure generated at the compressor air inlet, so that the high-temperature gas leaked from the back of the volute impeller is directly discharged, and the gas after heat transfer through the thrust bearing seat is smoothly discharged, thereby fully solving the technical problems of insufficient and unstable heat dissipation of the traditional thrust bearing heat dissipation gas path, that is, providing a stable and effective air-cooled return air connection structure, avoiding the situation where the high-temperature gas will directly contact the thrust bearing when flowing in the volute, achieving the effect of ensuring good heat dissipation of the bearing, and greatly contributing to the extension of the service life of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional view of the structure of the utility model;

[0020] Figure 2 This is a three-dimensional view of the air return duct structure of the utility model;

[0021] Figure 3 Another stereoscopic view of the air return duct structure of the utility model;

[0022] Figure 4 This is a cross-sectional view of the volute casing and the air inlet pipe of the utility model;

[0023] Figure 5 This is a three-dimensional view of the dissected structure of the air return duct of the utility model;

[0024] Figure 6 Another dissected stereoscopic view of the air return duct structure of the utility model;

[0025] Figure 7 This is another dissected stereoscopic view of the air return duct structure of the utility model.

[0026] In the figure: 1. Compressor body; 2. Mounting base; 3. Volute casing; 4. Inlet pipe; 5. Volute impeller; 6. Thrust bearing seat; 7. Outlet interface pipe; 8. Mounting buckle; 9. Steel belt type elastic clamp; 10. Return air duct; 801. Fastening rubber lining ring. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-Figure 7 The technical solution provided by the utility model specifically includes the following embodiments:

[0029] Compressor air cooling return air connection structure, including

[0030] A compressor body 1 and a mounting base 2, wherein the mounting base 2 is fixedly mounted on the bottom of the compressor body 1;

[0031] The volute casing 3 and the air inlet pipe 4, the volute casing 3 is installed at the side end of the compressor body 1, and the air inlet pipe 4 is installed at the side end of the volute casing 3;

[0032] A volute impeller 5 and a thrust bearing seat 6, wherein the thrust bearing seat 6 is installed inside the volute casing 3, and the volute impeller 5 is installed inside the air inlet pipe 4;

[0033] An outlet interface pipe 7, a steel belt type elastic clamp 9 and a return air duct 10. The number of the outlet interface pipes 7 is two and they are connected and installed with the volute casing 3 and the air inlet pipe 4 respectively. The end of the return air duct 10 is sleeved on the surface of the outlet interface pipe 7 and is sleeved and fastened by the steel belt type elastic clamp 9.

[0034] More specifically, a return air duct 10 is provided to connect air chambers of different pressures to make them conductive, and the return air duct 10 is installed through the outlet interface pipe 7, the volute casing 3 and the air inlet pipe 4, playing the role of fixing the duct.

[0035] In the utility model: the surface of the outlet interface pipe 7 is provided with a mounting buckle 8, the side surface of the mounting buckle 8 is in a regular hexagonal shape, and the volute housing 3 and the air inlet pipe 4 are connected by a split joint design;

[0036] More specifically, by adopting a split joint connection design for the volute casing 3 and the air inlet pipe 4, the casting of the volute casing 3 and the air inlet pipe 4 structure is easier to achieve, thereby reducing the production cost.

[0037] In the utility model: the end surface of the mounting buckle 8 is bonded with a fastening rubber lining ring 801, and the fastening rubber lining ring 801 is made of fluororubber;

[0038] More specifically, by providing the fastening rubber lining ring 801 made of fluororubber material, the structural material is made more corrosion-resistant, thereby ensuring a longer service life.

[0039] In the present invention: the fastening rubber lining ring 801 is a circular structure, and the fastening rubber lining ring 801 is sleeved on the surface of the outlet interface pipe 7;

[0040] More specifically, by providing a fastening rubber lining ring 801 with a circular structure, the contact is tighter during connection.

[0041] In the utility model: two outlet interface pipes 7 are overlapped with the surface of the volute casing 3 and the air inlet pipe 4 respectively through the installation buckle 8 and the fastening lining rubber ring 801;

[0042] More specifically, two outlet interface pipes 7 are provided and overlapped with the surfaces of the volute casing 3 and the air inlet pipe 4 respectively through the mounting buckle 8 and the fastening rubber lining ring 801, so that the connection is more secure, thereby ensuring the sealing performance.

[0043] In the utility model: the surface of the outlet interface pipe 7 is provided with threads, and the connection mode of the two outlet interface pipes 7 with the volute casing 3 and the air inlet pipe 4 is threaded connection;

[0044] More specifically, the two outlet interface pipes 7 are connected to the volute casing 3 and the air inlet pipe 4 by threaded connection, which makes assembly very convenient and also convenient for disassembly and maintenance.

[0045] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0046] During operation (working principle), the outlet interface pipe 7 is first connected to the bottom of the volute casing 3 and the air inlet pipe 4 through the threaded case arranged on its surface, and then the return air duct 10 is sleeved and installed on the outlet interface pipe 7, and the return air duct 10 is sleeved and fastened on the outlet interface pipe 7 through the steel belt type elastic hoop 7, so that the external gas enters the air inlet pipe 4, and after being compressed by the volute impeller 5, a small amount of gas will leak through the gap of the volute impeller 5 and directly contact the thrust bearing seat 6. After passing through the thrust bearing seat 6, these gases flow out from the interface node at the bottom of the volute casing 3 and take away a large amount of heat; and because the air inlet pipe 4 is in a negative pressure state, these leaked gases will be pressed to the interface of the air inlet pipe 4 through the return air duct 10, and enter the air inlet pipe 4 again, thereby realizing a closed loop of gas circulation, thereby realizing the process of heat dissipation of the thrust bearing seat 6.

[0047] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. The compressor air-cooled return air connection structure is characterized by: include A compressor body (1) and a mounting base (2), wherein the mounting base (2) is fixedly mounted on the bottom of the compressor body (1); A volute casing (3) and an air inlet pipe (4), wherein the volute casing (3) is mounted on a side end of the compressor body (1), and the air inlet pipe (4) is mounted on the side end of the volute casing (3); A volute impeller (5) and a thrust bearing seat (6), wherein the thrust bearing seat (6) is mounted inside the volute casing (3), and the volute impeller (5) is mounted inside the air inlet pipe (4); An outlet interface pipe (7), a steel belt type elastic clamp (9) and a return air duct (10), wherein the number of the outlet interface pipes (7) is two and they are connected to and installed with the volute casing (3) and the air inlet pipe (4) respectively, and the end of the return air duct (10) is sleeved on the surface of the outlet interface pipe (7) and is sleeved and fastened by the steel belt type elastic clamp (9).

2. The compressor air-cooling return air connection structure according to claim 1, characterized in that: A mounting buckle (8) is provided on the surface of the outlet interface pipe (7), and the side surface of the mounting buckle (8) is in a regular hexagonal shape. The volute casing (3) and the air inlet pipe (4) are connected by a split joint design.

3. The compressor air-cooling return air connection structure according to claim 2 is characterized in that: A fastening rubber lining ring (801) is bonded to the end surface of the mounting buckle ring (8), and the fastening rubber lining ring (801) is made of fluororubber.

4. The compressor air-cooling return air connection structure according to claim 3 is characterized in that: The fastening rubber lining ring (801) is a circular structure, and the fastening rubber lining ring (801) is sleeved on the surface of the outlet interface pipe (7).

5. The compressor air-cooling return air connection structure according to claim 4, characterized in that: The two outlet interface pipes (7) are overlapped with the surfaces of the volute casing (3) and the air inlet pipe (4) respectively through the installation buckle (8) and the fastening rubber lining ring (801).

6. The compressor air-cooling return air connection structure according to claim 1, characterized in that: The surface of the outlet interface pipe (7) is provided with threads, and the two outlet interface pipes (7) are connected to the volute casing (3) and the air inlet pipe (4) in a threaded connection manner.

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