CN216742203U - Fan base, fan assembly, shell assembly and air cycle machine - Google Patents

Abstract

The application provides a fan seat, fan subassembly, casing subassembly and air cycle machine. The fan base is of a single-body structure and comprises a compressor connecting part (4) and a fan mounting part (5), the compressor connecting part (4) is configured to be connected with a compressor shell (15) of a compressor, the fan mounting part (5) is configured to mount a fan, the fan mounting part (5) comprises an air inlet (1), an air flow channel (2) and an air outlet (3), and the air inlet (1) is communicated with the air outlet (3) through the air flow channel (2). According to the fan base, the design difficulty of the fan base can be reduced, the processing technology difficulty is reduced, and the maintainability of the fan base is improved.

Description

Fan base, fan assembly, shell assembly and air cycle machine

Technical Field

The application relates to the technical field of aircraft air conditioners, in particular to a fan seat, a fan assembly, a shell assembly and an air cycle machine.

Background

In modern aircraft environmental control systems, Air Cycle Machines (ACMs) are air-mediated to provide air at a desired pressure, temperature, and humidity to the passenger cabin. An air cycle machine includes a compressor, a turbine, and a fan rotating about a common axis, the compressor compressing heat source air and delivering it downstream. The compressed air expands in the turbine to convert the internal energy and the mechanical energy, thereby driving the compressor and the fan to rotate.

The traditional air cycle machine generally adopts an integrated structure of a shell of the air compressor and a shell of the fan, the appearance geometry structure is complex, the processing technology difficulty is increased, and the maintainability is reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in providing a fan seat, fan subassembly, casing subassembly and air cycle machine, can reduce the design degree of difficulty of fan seat, reduces the processing technology degree of difficulty, improves the maintainability of fan seat.

In order to solve the above problems, the present application provides a blower base, where the blower base is a single-body structure, the blower base includes a compressor connecting portion and a fan mounting portion, the compressor connecting portion is configured to be connected with a compressor housing of a compressor, the fan mounting portion is configured to mount a fan, the fan mounting portion includes an air inlet, an air flow passage and an air outlet, and the air inlet is communicated with the air outlet through the air flow passage.

Preferably, be provided with inside shoulder hole on the fan installation department, one side that inside shoulder hole is close to compressor connecting portion is provided with compressor side sealing connection structure, and one side that inside shoulder hole is close to the fan is provided with fan side sealing connection structure, and inside shoulder hole still includes bearing coupling mechanism.

Preferably, the fan mounting part further comprises a blower inner ring, and an air flow channel is formed between the blower inner ring and the outer wall of the blower base.

Preferably, the cross section of the inner ring of the fan is in a U shape, and the U-shaped bottom of the inner ring of the fan protrudes towards the compressor connecting part.

Preferably, in the section passing through the central axis of the main shaft mounting hole of the fan base, the section of the flow guide wall of the air flow channel is arc-shaped, the diameter of the section of the flow guide wall of the air flow channel is DR, the diameter of the inner ring of the fan inner ring is D1, and DR/D1 is more than or equal to 0.81 and less than or equal to 0.95.

Preferably, the air flow channel is an annular flow channel, and the diameter of an inner ring of the air flow channel is smaller than that of an inner ring of the fan inner ring.

Preferably, in a cross section passing through a central axis of a main shaft mounting hole of the fan base, the cross section of the flow guide wall of the air flow channel is arc-shaped, a straight line parallel to the central axis of the main shaft mounting hole is made by taking the center of the arc as the center, and the cross section of the flow guide wall of the air flow channel is divided into two parts, wherein the arc length of the flow guide wall close to the central axis of the main shaft mounting hole is smaller than the arc length of the flow guide wall far away from the central axis of the main shaft mounting hole.

Preferably, the compressor connecting portion comprises a compressor air inlet pipe and a connecting convex ring arranged on one side, far away from the fan mounting portion, of the compressor air inlet pipe, a connecting flange is arranged at the end portion, far away from the fan mounting portion, of the connecting convex ring, and a connecting hole is formed in the connecting flange along the circumferential direction.

Preferably, the air inlet pipe of the air compressor is a reducing pipe, the reducing angle of the air inlet pipe of the air compressor is theta, and the theta is more than 0 and less than or equal to 6.1 degrees.

According to another aspect of the application, a fan assembly is provided, which comprises a fan base.

Preferably, the fan further comprises a stamping valve, the stamping valve is connected to the fan mounting part of the fan base, and stamping air after heat exchange with the heat exchanger enters the air flow channel through the air inlet and then flows out of the air outlet and is discharged out of the fan mounting part through the stamping valve.

According to another aspect of the present application, there is provided a housing assembly including a compressor housing and a fan base independent from each other, the fan base being the above-mentioned fan base, the compressor housing being connected to a compressor connecting portion of the fan base.

Preferably, the compressor connecting portion comprises a connecting convex ring, the connecting convex ring is provided with a connecting flange, when the connecting flange is provided with a connecting hole along the circumferential direction, the compressor shell comprises a volute, the volute comprises a connecting end, and the connecting end is sleeved in the connecting convex ring and forms sealing connection with the connecting convex ring.

Preferably, the end of the connecting end is provided with a circumferential flange, the circumferential flange is in sealing fit with the inner circumferential wall of the connecting convex ring, and the volute is fixedly connected with the connecting flange.

According to another aspect of the present application, there is provided an air cycle machine comprising a housing assembly as described above and a spindle mounted within the housing assembly.

Preferably, the fan installation part is provided with an internal stepped hole, one side of the internal stepped hole, which is close to the compressor connection part, is provided with a compressor side sealing connection structure, one side of the internal stepped hole, which is close to the fan, is provided with a fan side sealing connection structure, the compressor side sealing connection structure is provided with a compressor side seal, the fan side sealing connection structure is provided with a fan side seal, the internal stepped hole is internally provided with a radial bearing, and the main shaft is installed in the radial bearing.

The utility model provides a fan seat, fan seat are monomer formula structure, and fan seat includes compressor connecting portion and fan installation department, and compressor connecting portion are configured to be connected with the compressor casing of compressor, and fan installation department is configured to the installation fan, and fan installation department includes air inlet, air runner and gas outlet, and the air inlet passes through air runner and gas outlet intercommunication. The fan seat is independent of the compressor shell and forms a single-body structure with the compressor shell respectively, so that the fan seat can be formed independently, the geometric complexity of the appearance is reduced, the processing difficulty and the production cost of an inner cavity are reduced, the internal processing precision of the fan seat is ensured more easily, and the maintainability of the fan seat is improved simultaneously.

Drawings

FIG. 1 is a schematic cross-sectional view of a blower base according to an embodiment of the present application;

FIG. 2 is a left side view of the blower base according to one embodiment of the present application;

FIG. 3 is a right side view of the fan mount according to one embodiment of the present application;

FIG. 4 is a cross-sectional block diagram of an air cycle machine according to an embodiment of the present application;

FIG. 5 is a schematic illustration of an air cycle machine according to an embodiment of the present application.

The reference numerals are represented as:

1. an air inlet; 2. an air flow passage; 3. an air outlet; 4. a compressor connection section; 5. a fan mounting section; 6. an internal stepped bore; 7. a compressor side seal connection structure; 8. a fan side seal connection structure; 9. an inner ring of the fan; 10. a gas inlet pipe of the gas compressor; 11. a connecting convex ring; 12. a connecting flange; 13. stamping the valve; 14. a heat exchanger; 15. a compressor housing; 16. a connecting end; 17. a circumferential flange; 18. a main shaft; 19. a fan base; 20. bearing connection structure.

Detailed Description

Referring to fig. 1 to 5 in combination, according to an embodiment of the present application, the blower base is a single-body structure, the blower base includes a compressor connection portion 4 and a fan installation portion 5, the compressor connection portion 4 is configured to be connected with a compressor housing 15 of the compressor, the fan installation portion 5 is configured to install a fan, the fan installation portion 5 includes an air inlet 1, an air flow passage 2 and an air outlet 3, and the air inlet 1 is communicated with the air outlet 3 through the air flow passage 2.

The fan base and the compressor housing in the related art are of an integrated structure, and when the fan base and the compressor housing are machined, a mounting structure for mounting the fan and the compressor in a matched mode needs to be machined in the air compressor, so that the internal and external geometric structures are complex, the machining difficulty is high, the machining cost is high, and the machining precision is difficult to guarantee.

And in this application, the fan seat is independent of the compressor casing and exists, forms the monomer formula structure respectively with the compressor casing, consequently makes the fan seat can the independent shaping, has reduced the geometric complexity of appearance, simultaneously because the inner chamber of fan seat and the inner chamber of compressor need not simultaneously to be processed in inside, consequently has reduced the processing degree of difficulty and the manufacturing cost of inner chamber, guarantees the inside machining precision of fan seat more easily, has improved the maintainability of fan seat simultaneously.

In one embodiment, the fan mounting portion 5 is provided with an internal stepped hole 6, a compressor side sealing connection structure 7 is provided on one side of the internal stepped hole 6 close to the compressor connection portion 4, and a fan side sealing connection structure 8 is provided on one side of the internal stepped hole 6 close to the fan. In this embodiment, inside shoulder hole 6 includes a plurality of continuous shoulder holes, and a plurality of shoulder holes set gradually along the axial, and a plurality of shoulder holes are coaxial setting, are convenient for guarantee the machining precision on the one hand, and on the other hand, a plurality of shoulder holes can provide installation space for the installation of main shaft 18, and can realize journal bearing's installation location to and the sealing connection structure of convenient design, be convenient for and other structures between realize sealing connection.

In this embodiment, a compressor side sealing connection structure 7 is designed on one side of the inner stepped hole 6 close to the compressor connection part 4, a fan side sealing connection structure 8 is arranged on one side close to the fan, sealing structures can be arranged at both ends of the inner stepped hole 6, sealing of both ends of the inner stepped hole 6 is achieved, and therefore the sealing structures can be installed on the fan base, and the fan base forms two independent air working cavities in the two parts of the compressor connection part 4 and the fan installation part 5. Inside shoulder hole 6 is still including carrying out bearing connection structure 20, conveniently carries out the installation of bearing fixed to can conveniently set up main shaft 18 in inside shoulder hole 6, realize that the installation of main shaft 18 is fixed.

In one embodiment, the fan mounting portion 5 further comprises a blower inner ring 9, and the air flow passage 2 is formed between the blower inner ring 9 and the outer wall of the blower base. The fan inner ring 9 can form the cooperation with the fan of installing in fan inner ring 9 department, makes things convenient for the fan to carry out the air current and carries, and fan inner ring 9 can also form air runner 2 with between the outer wall of fan seat simultaneously, makes things convenient for ram air to get into air runner 2 after through fan inner ring 9 outflow.

In one embodiment, the cross section of the blower inner ring 9 is U-shaped, the U-shaped bottom of the blower inner ring 9 protrudes toward the compressor connecting portion 4, on one hand, an arc-shaped flow guide structure can be formed by the U-shaped bottom of the blower inner ring 9, flow loss of airflow in a steering process after the airflow enters the air flow channel 2 is reduced, and air flow efficiency is improved, and on the other hand, the U-shaped groove can face the ram valve 13, so that the ram valve 13 can be embedded into the U-shaped groove, and the installation and fixation of the ram valve 13 on the fan installation portion 5 are facilitated.

In one embodiment, in a cross section passing through the central axis of the main shaft mounting hole of the blower base, the cross section of the guide wall of the air flow passage 2, i.e. the molded line, is circular arc, the diameter of the cross section of the guide wall of the air flow passage 2, i.e. the molded line, is DR, and the diameter of the inner ring of the blower inner ring 9 is D1.

DR and D1 determine the size of the air flow passage 2, and influence the resistance of the fan to draw ram air, the smaller the resistance, the more advantageous the heat exchange effect. The larger D1 is, the larger the size of the fan becomes in order to maintain the clearance between the fan and the fan inner ring 9, and the larger the size of the fan becomes, which inevitably increases the weight of the components and also affects the size of the fluid passage through which the fan sucks the ram air.

By studying the dimensional relationship between DR and D1, the dimensional relationship between DR and D1 was defined as 0.81 ≦ DR/D1 ≦ 0.95. By defining the DR/D1 described above, air flow path profiles of different geometries can be obtained. In the value interval, the flow resistance of the ram air in the process of flowing through the air channel is small, and a good heat exchange effect can be obtained.

In one embodiment, the value range of D1 is set to 64-70 mm, and the value range of DR and the ratio of DR to D1 are shown in the following table:

TABLE 1 air flow channel line

TABLE 2 relationship between DR/D1 and Heat exchange efficiency

DR/D1	0.71	0.75	0.77	0.81	0.95
						Efficiency of heat exchange	0.649	0.663	0.686	0.697	0.752

Wherein, the first table is an air flow channel type line parameter table.

The second table shows the relationship between DR/D1 and heat exchange efficiency. As can be seen from Table two, the heat exchange efficiency is gradually increased with the increase of the DR/D1 ratio. However, as the ratio of DR/D1 increases, the wall thickness of the fan base becomes thinner, which affects the structural strength of the fan base, and therefore, in order to ensure that the overall structural strength and the heat exchange efficiency of the fan base can be balanced, the above ratio can be defined to obtain a better effect.

In the section of the central axis of the main shaft mounting hole passing through the fan base, the section of the flow guide wall of the air flow channel 2 is arc-shaped, a straight line parallel to the central axis of the main shaft mounting hole is made by taking the arc-shaped circle center as the center, and the section of the flow guide wall of the air flow channel 2 is divided into two parts, wherein the arc length of the flow guide wall close to the central axis of the main shaft mounting hole is smaller than that of the flow guide wall far away from the central axis of the main shaft mounting hole.

Because the ram air needs to exchange heat with the heat exchanger 14 under the action of the fan, then enters the air flow channel 2, and then flows out of the air outlet 3, in order to ensure the heat exchange effect of the air and the heat exchanger 14, the molded line of the air flow channel 2 can be designed into one end of a circle, the molded line is not a semicircular arc but a minor arc, and the length of the arc close to one side of the fan is smaller, so as to ensure that the path of the ram air flowing through one side of the heat exchanger 14 flowing to the fan through the air flow channel 2 is shortened, thereby being beneficial to reducing the flowing resistance of the ram air.

In one embodiment, the air flow passage 2 is an annular flow passage, and the inner ring diameter of the air flow passage 2 is smaller than the inner ring diameter of the fan inner ring 9, so that an air outlet passage can be formed between the flow guide wall of the air flow passage 2 and the fan inner ring 9, and the air flow can smoothly flow out through the air outlet passage under the action of the fan.

In one embodiment, the compressor connection portion 4 includes a compressor inlet pipe 10 and a connection convex ring 11 disposed on a side of the compressor inlet pipe 10 away from the fan mounting portion 5, an end portion of the connection convex ring 11 away from the fan mounting portion 5 is provided with a connection flange 12, and the connection flange 12 is circumferentially provided with a connection hole. In this embodiment, the compressor connection portion 4 of the blower base includes a compressor inlet pipe 10 and a connection convex ring 11 disposed on a side of the compressor inlet pipe 10 away from the fan mounting portion 5, which is equivalent to dividing the compressor structure into two parts, the compressor inlet pipe 10 and other parts, and making the compressor inlet pipe 10 of the two parts and the blower base into an integrated structure, that is, the compressor inlet pipe 10 belongs to a part of the blower base, and the main factors of the structural design consideration are as follows: the air inlet pipe 10 of the compressor is intersected with the main body part of the fan base, so that the intersected part is more, the intersected area is larger, if the part belonging to the compressor and the part belonging to the fan base are completely cut, the cutting is inconvenient, the processing workload is large, the design of the intersected part of the air inlet pipe 10 of the compressor and the main body part of the fan base needs to be considered, the cutting difficulty is large, the processing and design difficulty of the fan base can be increased, and therefore the part belonging to the compressor and the part belonging to the fan base are completely cut, and the optimal solution is not achieved.

Considering that the compressor is provided with a section of pipe section at the connecting position of the compressor air inlet pipe 10 and the volute, the diameter of the pipe section is smaller, and the pipe section does not have an intersecting part with other structures, therefore, the compressor air inlet pipe 10 and the volute and other parts belonging to the compressor can be cut, the cutting difficulty can be reduced, the split design is convenient to carry out, one part of the volute can be exposed, and the processing of the volute is convenient to carry out, therefore, the design not only can reduce the design difficulty and the processing difficulty of the fan base, but also can give consideration to the design and the processing of the compressor, and the processing performance and the processing difficulty of the fan base and the compressor shell 15 can reach better design while the fan base and the compressor shell are independently designed respectively.

In one embodiment, the compressor inlet pipe 10 is a reducer, and the taper angle of the compressor inlet pipe 10 is theta, where theta is greater than 0 and less than or equal to 6.1 degrees. When the compressor air inlet pipe 10 is designed to be of the tapered structure, sufficient air inlet effect can be obtained when heat source air passes through the compressor air inlet pipe 10.

According to an embodiment of the present application, a blower assembly includes a blower base, which is the blower base described above.

Referring to fig. 4 and 5 in combination, in one embodiment, the blower assembly further includes a ram valve 13, the ram valve 13 is connected to the fan mounting portion 5 of the blower base, and ram air after heat exchange with the heat exchanger 14 enters the air flow passage 2 through the air inlet 1, then flows out through the air outlet 3, and exits the fan mounting portion 5 through the ram valve 13. The ram valve 13, also called ram valve, is used to regulate the air flow through the heat exchanger 14.

The high-temperature gas enters the expansion machine to do expansion work, internal energy is converted into kinetic energy to serve as power for driving the gas compressor and the fan to rotate partially, and the gas temperature is reduced and flows to the next stage from the expansion machine. The expander does work to drive the fan component to rotate, ram air from one side of the heat exchanger 14 is sucked in, passes through the air flow channel 2 in the fan base and is finally discharged through the ram valve 13, and heat exchange is achieved.

In this embodiment, through bolted connection between the tip flange of punching press valve 13 and fan seat, the adversion of punching press valve 13 is provided with the inner ring arch simultaneously, and the inner ring is protruding to be inserted the U-shaped inslot of fan inner ring 9 to can with bolted connection structure cooperation, realize the quick location between punching press valve 13 and the fan seat and be connected, reduce the installation degree of difficulty, improve the installation effectiveness.

Referring to fig. 4 and 5 in combination, in one embodiment, the housing assembly includes a compressor housing 15 and a fan base 19 which are independent of each other, the fan base 19 is the fan base described above, and the compressor housing 15 is connected to the compressor connecting portion 4 of the fan base 19.

The compressor connecting part 4 comprises a connecting convex ring 11, the connecting convex ring 11 is provided with a connecting flange 12, when the connecting flange 12 is provided with a connecting hole along the circumferential direction, the compressor shell 15 comprises a volute, the volute comprises a connecting end 16, the connecting end 16 is sleeved in the connecting convex ring 11, and a sealing connection is formed between the connecting end 16 and the connecting convex ring 11. In this embodiment, the structure of the volute inner cavity of the compressor housing 15 is unchanged, but the structure of the volute connecting end 16 is divided into two layers, one layer is the cavity wall structure of the volute itself, and the other layer is the connecting convex ring 11 which forms a sleeving structure with the connecting end 16 of the volute, so that the compressor housing 19 and the compressor housing 15 can be conveniently connected in a sealing manner without affecting the compressor performance of the compressor itself.

The end of the connecting end 16 is provided with a circumferential flange 17, the circumferential flange 17 is in sealing fit with the inner circumferential wall of the connecting convex ring 11, and the volute is fixedly connected with the connecting flange 12. In this embodiment, the circumferential flange 17 forms a sealing fit with the inner wall of the connecting collar 11, while the scroll end of the volute forms a fixed connection with the connecting flange 12 by means of bolts.

Referring collectively to fig. 4 and 5, in one embodiment, the air cycle machine includes a housing assembly, which is described above, and a spindle 18, which is mounted within the housing assembly.

Be provided with inside shoulder hole 6 on fan installation department 5, inside shoulder hole 6 is provided with compressor side seal connection structure 7 near one side of compressor connecting portion 4, when inside shoulder hole 6 is provided with compressor side seal connection structure 8 near one side of fan, compressor side seal connection structure 7 department is installed and is pressed the gas side and seal, fan side seal connection structure 8 department is installed and is sealed at the fan, install radial bearing in the bearing connection structure 20 of inside shoulder hole 6, the main shaft is installed in radial bearing.

In this embodiment, when the main shaft 18 is installed in the housing assembly, the air compressor side seal, the radial bearing and the fan side seal can be respectively installed on the fan base 19 through bolt connection, two independent air working chambers can be formed, that is, the air compressor part working chamber and the fan base right side working chamber, air flows to the air compressor part working chamber through the air inlet pipe 10 of the air compressor, ram air enters the fan base right side fan working chamber through the air inlet 1, air flow between the two working chambers is reduced, normal flow of air circulation is ensured, and meanwhile, the installation of the radial bearing also ensures the stability of normal work of the main shaft 18.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (16)

1. The fan base is characterized in that the fan base is of a single-body structure and comprises a compressor connecting portion (4) and a fan mounting portion (5), the compressor connecting portion (4) is configured to be connected with a compressor shell (15) of a compressor, the fan mounting portion (5) is configured to be mounted with a fan, the fan mounting portion (5) comprises an air inlet (1), an air flow channel (2) and an air outlet (3), and the air inlet (1) is communicated with the air outlet (3) through the air flow channel (2).

2. The blower base according to claim 1, characterized in that an internal stepped hole (6) is formed in the fan mounting portion (5), a compressor side sealing connection structure (7) is formed on one side, close to the compressor connection portion (4), of the internal stepped hole (6), a blower side sealing connection structure (8) is formed on one side, close to the fan, of the internal stepped hole (6), and the internal stepped hole (6) further comprises a bearing connection mechanism (20).

3. The blower base according to claim 1, characterized in that the fan mounting portion (5) further comprises a blower inner ring (9), the air flow channel (2) being formed between the blower inner ring (9) and an outer wall of the blower base.

4. The blower base according to claim 3, characterised in that the blower inner ring (9) is U-shaped in cross section, the U-shaped bottom of the blower inner ring (9) projecting towards the compressor connection (4).

5. The fan base according to claim 3, wherein in a cross section passing through a central axis of a main shaft mounting hole of the fan base, a cross section of the flow guide wall of the air flow passage (2) is circular arc, a cross section diameter of the flow guide wall of the air flow passage (2) is DR, an inner ring diameter of the fan inner ring (9) is D1, and DR/D1 is more than or equal to 0.95 and more than or equal to 0.81.

6. The fan base according to claim 3, wherein the air flow channel (2) is an annular flow channel, and the inner ring diameter of the air flow channel (2) is smaller than the inner ring diameter of the fan inner ring (9).

7. The blower base according to claim 1, wherein in a cross section passing through a central axis of a spindle mounting hole of the blower base, a cross section of the guide wall of the air flow passage (2) is arc-shaped, a straight line parallel to the central axis of the spindle mounting hole is made centering on a center of the arc, and the cross section of the guide wall of the air flow passage (2) is divided into two parts, wherein a length of the arc of the guide wall close to the central axis of the spindle mounting hole is smaller than a length of the arc of the guide wall far away from the central axis of the spindle mounting hole.

8. The blower base according to any one of claims 1 to 7, wherein the compressor connecting portion (4) includes a compressor inlet pipe (10) and a connecting convex ring (11) disposed on one side of the compressor inlet pipe (10) away from the fan mounting portion (5), a connecting flange (12) is disposed at an end portion of the connecting convex ring (11) away from the fan mounting portion (5), and the connecting flange (12) is circumferentially provided with a connecting hole.

9. The fan base according to claim 8, wherein the compressor inlet pipe (10) is a reducer, and the taper angle of the compressor inlet pipe (10) is θ, and θ is greater than 0 and less than or equal to 6.1 °.

10. A fan assembly comprising a fan mount according to any of claims 1 to 9.

11. The fan assembly according to claim 10, further comprising a ram valve (13), wherein the ram valve (13) is connected to the fan mounting portion (5) of the fan base, ram air after heat exchange with the heat exchanger (14) enters the air flow channel (2) through the air inlet (1) and then flows out through the air outlet (3) and is discharged out of the fan mounting portion (5) through the ram valve (13).

12. A housing assembly, characterized by comprising a compressor housing (15) and a blower base (19) independent of each other, the blower base (19) being the blower base according to any one of claims 1 to 9, the compressor housing (15) being connected to a compressor connection (4) of the blower base (19).

13. The housing assembly according to claim 12, wherein the compressor connection portion (4) comprises a connection convex ring (11), the connection convex ring (11) is provided with a connection flange (12), when the connection flange (12) is provided with a connection hole along the circumferential direction, the compressor housing (15) comprises a volute, the volute comprises a connection end (16), and the connection end (16) is sleeved in the connection convex ring (11) and forms a sealing connection with the connection convex ring (11).

14. The housing assembly according to claim 13, characterized in that the end of the connection end (16) is provided with a circumferential flange (17), the circumferential flange (17) being in sealing engagement with the inner circumferential wall of the connection collar (11), the volute being fixedly connected to the connection flange (12).

15. An air cycle machine comprising a housing assembly according to any one of claims 12 to 14 and a spindle (18), the spindle (18) being mounted within the housing assembly.

16. The air cycle machine of claim 15, wherein the fan mounting portion (5) is provided with an internal stepped bore (6), a compressor-side seal connection structure (7) is provided on a side of the internal stepped bore (6) close to the compressor connection portion (4), when a fan-side seal connection structure (8) is provided on a side of the internal stepped bore (6) close to the fan, a compressor-side seal is mounted at the compressor-side seal connection structure (7), a fan-side seal is mounted at the fan-side seal connection structure (8), a radial bearing is mounted in the internal stepped bore (6), and the spindle is mounted in the radial bearing.

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