Aerodynamic device and method of assembly

Abstract

The application belongs to the technical field of turbine power devices, and provides a gas power device and an assembling method, wherein the gas power device comprises a load section, a power section, a rotor assembly and a transfer shaft; the rotor assembly is in driving connection with the transfer shaft in the axial direction, and the end of the transfer shaft away from the rotor assembly is in driving connection with the power section; the load section is installed at the end of the rotor assembly away from the transfer shaft; a bearing casing is connected between the load section and the power section, and the bearing casing is located outside the rotor assembly. In the gas power device of the application, the power section transmits power to the rotor assembly through the transfer shaft, the structure discards the traditional integrated rotor structure, the load section and the power section can be split into two independent devices, each independent device can be adapted with other equipment, and thus the adaptability and expandability are improved.

Description

Technical Field

[0001] This invention belongs to the field of turbine power device technology, and specifically relates to an air supply power device and its assembly method. Background Technology

[0002] Auxiliary (gas supply) power units, as a typical type of aircraft turbine power unit, have one of their main functions: providing high-pressure gas to the aircraft. However, their gas supply is primarily used to start the main engines and the aircraft's cabin air conditioning system. Based on their functional characteristics, they can also be used to provide high-pressure gas under the wings of fixed-wing aircraft. For example... Figure 1 As shown, its main structure is divided into a load section and a power section, which are matched together and cannot be used separately. The power section mainly includes the combustion chamber and turbine. The rotating parts of the load section and the power section are connected by a long shaft and pre-tightened to form a rotor system. Support points 1 and 2 constitute the support system of a double-support rotor. Therefore, in existing auxiliary power units, the load compressor air supply section is not an independent device. The load section and the power section are matched together and cannot be used separately, resulting in poor adaptability and expandability. Summary of the Invention

[0003] To address the problems in the background art, the present invention proposes an air-supplying power device and its assembly method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pneumatic power supply device includes a load section, a power section, a rotor assembly, and a transfer shaft;

[0006] The rotor assembly is axially connected to the adapter shaft, and the end of the adapter shaft away from the rotor assembly is connected to the power section.

[0007] The load section is installed at the end of the rotor assembly away from the adapter shaft;

[0008] A bearing housing is connected between the load section and the power section, and the bearing housing is located outside the rotor assembly.

[0009] Preferably, the rotor assembly includes a centrifugal impeller and a shaft integrally connected to the centrifugal impeller;

[0010] The centrifugal impeller is located at one end of the shaft;

[0011] A plug is installed at the end of the centrifugal impeller;

[0012] The shaft body is connected to the bearing housing by a roller bearing and a ball bearing.

[0013] Along the axial direction of the shaft, the centrifugal impeller, the roller bearing, and the ball bearing are arranged in sequence;

[0014] The end of the shaft body away from the centrifugal impeller is provided with a spline for key connection with the adapter shaft.

[0015] Preferably, a first nut is installed on the shaft body adjacent to the roller bearing, for abutting the roller bearing in the axial direction of the shaft body.

[0016] A second nut is installed on the shaft body adjacent to the ball bearing, for abutting the ball bearing in the axial direction of the shaft body, and a baffle is further provided above the second nut, which is fixedly connected with the bearing case and abuts against the ball bearing in the axial direction.

[0017] Preferably, the load section comprises a volute case and an impeller cover.

[0018] The volute case and the impeller cover are both arranged on the circumferential side of the centrifugal impeller.

[0019] The inner cavity of the volute case is an annular cavity, and the cross section of the annular cavity is a circumferentially gradually changing cross section.

[0020] The case body at the gas inlet of the volute case is provided with a first mounting edge and a second mounting edge.

[0021] The first mounting edge is connected with the impeller cover by bolts.

[0022] The second mounting edge is connected with the bearing case by bolts.

[0023] Preferably, a plurality of support plates are further arranged in the circumferential direction in the annular cavity of the volute case.

[0024] One end of the support plate is connected with the inner wall of the first mounting edge, and the other end is connected with the inner wall of the second mounting edge.

[0025] Preferably, in the rotor assembly, the circumferential surface of the shaft body is further provided with a labyrinth seal.

[0026] In the volute case, the second mounting edge is provided with an integral back plate in the radial direction of the shaft body, and the end of the back plate is provided with a coating.

[0027] The labyrinth seal is in sealing contact with the coating.

[0028] Preferably, the bearing case comprises a first flange edge, a second flange edge, a first positioning surface and a second positioning surface.

[0029] The first flange edge is connected with the first mounting edge by bolts.

[0030] The second flange edge is connected with the load section by bolts.

[0031] The first positioning surface and the second positioning surface are arranged in sequence along the axial direction at the protruding position of the inner wall of the bearing housing, and are used for rotatingly matching the shaft body with the bearing.

[0032] Preferably, a first oil supply channel and a first oil return channel are arranged on the bearing housing body at the corresponding circumferential position of the first positioning surface; the first oil supply channel is located at the top of the bearing housing body and is arranged along the radial direction; and the first oil return channel is located at the bottom of the bearing housing body and is arranged along the axial direction.

[0033] A second oil supply channel and a second oil return channel are arranged on the bearing housing body at the corresponding circumferential position of the second positioning surface; the second oil supply channel is located at the top of the bearing housing body and is arranged along the radial direction; and the second oil return channel is located at the bottom of the bearing housing body and is arranged along the axial direction.

[0034] A total oil return port is further arranged on the bearing housing body outside the first oil return channel and the second oil return channel, and the total oil return port is located at the bottom of the first flange.

[0035] Preferably, the power section comprises a turbine shaft, a mounting joint and a turboshaft engine.

[0036] One end of the turbine shaft is connected with the adapter shaft through a key, and the other end of the turbine shaft is connected with the turboshaft engine through a transmission.

[0037] One end of the mounting joint is connected with the bearing housing through a bolt, and the other end of the mounting joint is connected with the turboshaft engine through a bolt.

[0038] The turbine shaft is located inside the mounting joint.

[0039] An assembly method for assembling the gas power device is provided, and the assembly method comprises the following steps:

[0040] The volute housing is connected with the bearing housing.

[0041] The rotor assembly is assembled into the bearing housing through the volute housing.

[0042] The impeller cover is assembled to the volute housing to obtain a gas supply unit body comprising the volute housing, the bearing housing and the impeller cover.

[0043] The gas supply unit body is connected with the power section through the adapter shaft.

[0044] The gas power device has the following beneficial effects:

[0045] 1、The power section of the gas power device is connected with the rotor assembly through the adapter shaft, so that the traditional integrated rotor structure is abandoned, the load section and the power section can be split into two independent devices, each independent device can be adapted to other equipment, and therefore the adaptability and expandability are improved.

[0046] 2、The air supply device of the application can be assembled by first integrating the volute casing, the outer wheel cover, the bearing casing and the rotor assembly into an air supply unit, and then installing the whole air supply unit in the power section, so that the assembly process does not need to consider the adaptation of the rotor assembly and the power section, and only needs to be connected through the intermediate shaft, thereby improving the flexibility of the adaptation of different types of load section and power section.

[0047] Other features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the present application. The purposes and other advantages of the present application will be realized and attained by the structures particularly pointed out in the description and the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0049] Figure 1 A schematic diagram of an existing auxiliary power device is shown;

[0050] Figure 2 A schematic diagram of the air supply power device of the present application is shown;

[0051] Figure 3 A structural schematic diagram of the rotor assembly of the present application is shown;

[0052] Figure 4 A structural schematic diagram of the load section of the present application is shown;

[0053] Figure 5 A structural schematic diagram of the volute casing of the present application is shown;

[0054] Figure 6 A structural schematic diagram of the bearing casing of the present application is shown;

[0055] Figure 7 A flowchart of the assembly method of the present application is shown.

[0056] In the diagram: 1. Volute casing; 101. First mounting edge; 102. Second mounting edge; 103. Support plate; 104. Aluminum-silicon coating; 105. Back plate; 2. Bearing casing; 201. First flange edge; 202. Second flange edge; 203. First positioning surface; 204. Second positioning surface; 205. First oil supply channel; 206. Second oil supply channel; 207. First oil return channel; 208. Second oil return channel; 209. Main oil return port; 3. Impeller cover; 4. Baffle; 5. Rotor assembly; 501. Centrifugal impeller; 502. Roller bearing; 503. Ball bearing; 504. First nut; 505. Second nut; 506. Plug; 507. Spline; 508. Shaft body; 509. Grate; 6. Adapter shaft; 7. Turbine shaft; 8. Mounting section; 9. Turboshaft engine. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] A pneumatic power device, such as Figure 1 As shown, it includes a load section, a power section, a rotor assembly 5, and a transfer shaft 6. The rotor assembly 5 is axially connected to the transfer shaft 6, and the end of the transfer shaft 6 away from the rotor assembly 5 is connected to the power section. The load section is installed at the end of the rotor assembly 5 away from the transfer shaft 6; in addition, an annular bearing housing 2 connects the load section and the power section, and the rotor assembly 5 is rotatably installed inside the bearing housing 2.

[0059] It should be noted that, in Figure 2 In the structure, the power section transmits power to the rotor assembly 5 through the adapter shaft 6. This structure abandons the traditional integrated rotor structure, allowing the load section and the power section to be separated into two independent devices. Each independent device can be adapted to other equipment, thereby improving adaptability and expandability.

[0060] The following is combined Figures 2-6 Further explanation of the gas supply power unit.

[0061] like Figure 3As shown, the rotor assembly 5 includes a centrifugal impeller 501 and a shaft 508 integrally connected to the centrifugal impeller 501. The centrifugal impeller 501 is located at the front end of the shaft 508, and a cap 506 is installed at the end of the centrifugal impeller 501. A roller bearing 502 is connected between the middle section of the shaft 508 and the bearing housing 2, and a ball bearing 503 is connected between the rear section of the shaft 508 and the bearing housing 2. A spline 507 is provided at the end of the shaft 508 away from the centrifugal impeller 501, and the spline 507 is used for keyed connection with the adapter shaft 6. In addition, a first nut 504 is installed on the shaft 508 adjacent to the roller bearing 502. The first nut 504 is used to abut against the roller bearing 502 along the axial direction of the shaft 508. A second nut 505 is installed on the shaft 508 adjacent to the ball bearing 503. The second nut 505 is used to abut against the ball bearing 503 along the axial direction of the shaft 508. A baffle 4 is also provided above the second nut 505. The baffle 4 is fixedly connected to the bearing housing 2 and abuts against the ball bearing 503 along the axial direction.

[0062] It should be noted that, through Figure 3 It can be seen that the shaft 508 has a stepped surface at the position where the roller bearing 502 and the ball bearing 503 are installed. The inner ring of the bearing is installed on the stepped surface, while the outer ring abuts against the inner wall of the bearing housing 2, thereby ensuring the stability of the shaft 508 when rotating. In addition, the first nut 504 and the second nut 505 can abut against the corresponding bearing from one side of the stepped surface, thereby preventing the bearing from moving radially along the shaft 508.

[0063] It should be further explained that an opening groove is opened at one end of the shaft body 508, and the spline 507 is set on the inner wall of the opening groove. When connected with the adapter shaft 6, the adapter shaft 6 is embedded in the opening groove, and the spline 507 is engaged in the keyway on the surface of the adapter shaft 6.

[0064] like Figure 4 As shown, the load section includes a volute casing 1 and an impeller shroud 3, both positioned around the centrifugal impeller 501. This layout helps optimize the airflow path, reduce energy loss, and thus improve engine efficiency and performance. The inner cavity of the volute casing 1 is an annular cavity with a gradually changing circumferential cross-section. Its main function is to collect the compressed gas and supply it outwards along the channel. This facilitates a smooth airflow transition, reduces eddies and turbulence, and effectively improves gas compression efficiency, enabling the engine to generate greater thrust or power. Figure 5As shown, a first mounting edge 101 and a second mounting edge 102 are provided at the air inlet of the volute casing 1. The first mounting edge 101 is connected to the impeller cover 3 by bolts, and the second mounting edge 102 is connected to the bearing casing 2 by bolts. In addition, several support plates 103 are provided circumferentially inside the annular cavity of the volute casing 1. One end of the support plate 103 is connected to the inner wall of the first mounting edge 101, and the other end is connected to the inner wall of the second mounting edge 102. This not only enhances the structural strength of the volute casing 1 and prevents it from deforming or cracking under high pressure and high temperature environments, but also effectively guides the airflow, reduces the scouring and wear of the airflow on the inner wall of the volute casing 1, and extends its service life.

[0065] Combination Figure 2 and Figure 4 It can be seen that in the rotor assembly 5, the circumferential surface of the shaft 508 is also provided with grating teeth 509; in the volute casing 1, the second mounting edge 102 is provided with an integral back plate 105 along the radial direction of the shaft 508, and the end of the back plate 105 is provided with an aluminum-silicon coating 104, and the grating teeth 509 can make sealing contact with the aluminum-silicon coating 104. Figure 4 (At point A in the middle), forming a lubricating oil sealing system for the bearing cavity; moreover, the aluminum-silicon coating 104 can prevent the grating teeth 509 from being scratched and damaged.

[0066] like Figure 6 As shown, the bearing housing 2 includes a first flange edge 201, a second flange edge 202, a first positioning surface 203, and a second positioning surface 204. The first flange edge 201 is connected to the first mounting edge 101 by bolts, while the second flange edge 202 is connected to the load section by bolts. The first positioning surface 203 and the second positioning surface 204 are sequentially arranged axially on the protruding parts of the inner wall of the bearing housing 2 to ensure precise rotational fit between the bearing and the shaft 508.

[0067] It should be noted that the first positioning surface 203 and the second positioning surface 204 are located at both ends of the inner cavity of the bearing housing 2, respectively. These two positioning surfaces ensure that the rotor assembly 5 is stably installed inside the bearing housing 2. The first positioning surface 203 is interference-fitted with the outer ring of the roller bearing 502, and the second positioning surface 204 is interference-fitted with the outer ring of the ball bearing 503.

[0068] In order to further optimize the performance, the bearing housing of the bearing housing 2 is equipped with a first oil supply channel 205 and a first oil return channel 207 at the circumferential position of the first positioning surface 203. The first oil supply channel 205 is located at the top of the housing and arranged radially, while the first oil return channel 207 is located at the bottom and arranged axially. Similarly, at the circumferential position of the second positioning surface 204, a second oil supply channel 206 and a second oil return channel 208 are provided, wherein the second oil supply channel 206 is also located at the top and arranged radially, and the second oil return channel 208 is located at the bottom and arranged axially. Similarly, at the circumferential position of the second positioning surface 204, a second oil supply channel 206 and a second oil return channel 208 are provided, wherein the second oil supply channel 206 is also located at the top and arranged radially, and the second oil return channel 208 is located at the bottom and arranged axially.

[0069] It should be noted that the lubricating oil can reach the position of the roller bearing 502 and the ball bearing 503 from the top of the bearing housing 2 through the first oil supply channel 205 and the second oil supply channel 206 to provide lubrication. Then the lubricating oil flows to the bottom of the bearing housing 2 under the action of gravity, and flows to the total oil return port 209 through the first oil return channel 207 and the second oil return channel 208, and finally is discharged through the total oil return port 209.

[0070] Further, in order to facilitate oil return, the total oil return port 209 can be opened outside the first oil return channel 207 and the second oil return channel 208, and is arranged on the housing of the bearing housing 2, which can be opened at the bottom of the first flange edge 201.

[0071] In combination Figure 1 It can be seen that the power section includes a turbine shaft 7, a mounting section 8, and a turboshaft engine 9, one end of the turbine shaft 7 is keyed connected with the adapter shaft 6, and the other end is drivingly connected with the turboshaft engine 9; one end of the mounting section 8 is bolted connected with the bearing housing 2, and the other end is bolted connected with the turboshaft engine 9; and the turbine shaft 7 is located inside the mounting section 8.

[0072] It should be noted that in combination Figure 2 and Figure 6 It can be seen that the mounting section 8 and the second flange edge 202 can be connected by bolts, and the adapter shaft 6 and the shaft body 508 are connected by the spline 507. Therefore, the entire power section can be separated from the load section, which is different from the rotor in the prior art, and can effectively expand the adaptation range. Figure 1

[0073] As shown in Figure 7 , a method for assembling the above-mentioned gas power device, comprising the following steps:

[0074] S1: connecting the volute housing 1 and the bearing housing 2.

[0075] ​S2: Insert the rotor assembly 5 through the volute casing 1 into the bearing casing 2.

[0076] S3: Assemble the impeller cover 3 into the volute casing 1 to obtain an air supply unit containing the volute casing 1, the bearing casing 2, and the impeller cover 3.

[0077] S4: Connect the air supply unit to the power section via the adapter shaft 6.

[0078] by Figure 2 Taking the structure as an example, during assembly, the volute casing 1 and the bearing casing 2 are first connected together with bolts; then, the assembled rotor assembly 5 (without the ball bearing 503 and the second nut 505 installed) is inserted into the bearing casing 2 from the front through the volute casing 1, and then the ball bearing 503 and the second nut 505 are installed sequentially from the rear. Afterwards, the baffle 4 is installed to complete the installation and fixation of the rotor assembly 5; finally, the impeller cover 3 is installed on the first mounting edge 101 of the volute casing 1, completing the assembly of the entire air supply section unit. The air supply section unit is then assembled onto the turboshaft engine 9.

[0079] It should be noted that during the conversion process, the adapter shaft 6 is the key structure for adapting different load sections and power sections. The structural features at both ends of the adapter shaft 6 can be designed according to the shaft body 508 and turbine shaft 7 that need to be adapted, so as to ensure that the two can achieve a transmission connection, thereby improving the flexibility when adapting different types of load sections and power sections.

[0080] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas power plant, characterized in that The load section, the power section, the rotor assembly (5) and the adapter shaft (6); The rotor assembly (5) is in driving connection with the adapter shaft (6) in the axial direction, and one end of the adapter shaft (6) away from the rotor assembly (5) is in driving connection with the power section; The load section is installed at one end of the rotor assembly (5) away from the adapter shaft (6); The bearing housing (2) is connected between the load section and the power section, and the bearing housing (2) is located outside the rotor assembly (5); The rotor assembly (5) comprises a centrifugal impeller (501) and a shaft body (508) integrally connected with the centrifugal impeller (501); The centrifugal impeller (501) is located at one end of the shaft body (508); A plug cover (506) is installed at the end of the centrifugal impeller (501); The shaft body (508) is connected with the bearing housing (2) through a roller bearing (502) and a ball bearing (503); The centrifugal impeller (501), the roller bearing (502) and the ball bearing (503) are sequentially arranged in the axial direction of the shaft body (508); A spline (507) is arranged at the end of the shaft body (508) away from the centrifugal impeller (501), and the spline (507) is used for key connection with the adapter shaft (6); The load section comprises a volute housing (1) and an impeller cover (3); The volute housing (1) and the impeller cover (3) are arranged on the circumferential side of the centrifugal impeller (501); The inner cavity of the volute housing (1) is an annular cavity, and the cross section of the annular cavity is a gradually changing cross section in the annular direction; The housing at the gas inlet of the volute housing (1) is provided with a first mounting edge (101) and a second mounting edge (102); The first mounting edge (101) is connected with the impeller cover (3) through bolts; The second mounting edge (102) is connected with the bearing housing (2) through bolts; A plurality of support plates (103) are further arranged in the circumferential direction in the annular cavity of the volute housing (1); One end of the support plate (103) is connected with the inner wall of the first mounting edge (101), and the other end is connected with the inner wall of the second mounting edge (102).

2. A gas supply as claimed in claim 1, characterised in that A first nut (504) is installed on the shaft body (508) at a position adjacent to the roller bearing (502), and the first nut (504) is used for abutting against the roller bearing (502) in the axial direction of the shaft body (508); A second nut (505) is installed on the shaft body (508) at a position adjacent to the ball bearing (503), and the second nut (505) is used for abutting against the ball bearing (503) in the axial direction of the shaft body (508); and a baffle (4) is further arranged above the second nut (505), the baffle (4) is fixedly connected with the bearing housing (2) and abuts against the ball bearing (503) in the axial direction.

3. A gas supply as claimed in claim 1, wherein In the rotor assembly (5), the circumferential surface of the shaft body (508) is further provided with a grid tooth (509); In the volute housing (1), the second mounting edge (102) is provided with an integral back plate (105) in the radial direction of the shaft body (508), and the end of the back plate (105) is provided with a coating; The grid tooth (509) is in sealing contact with the coating.

4. A gas supply as claimed in claim 1, wherein The bearing housing (2) comprises a first flange (201), a second flange (202), a first positioning surface (203) and a second positioning surface (204); The first flange (201) is bolted to the first mounting edge (101); The second flange (202) is bolted to the load section; The first positioning surface (203) and the second positioning surface (204) are sequentially arranged on the inner wall protrusion of the bearing housing (2) in the axial direction, and are used for rotating cooperation with the shaft body (508) through the bearing.

5. A gas supply as claimed in claim 4, wherein Along the corresponding circumferential position of the first positioning surface (203), the housing body of the bearing housing (2) is provided with a first oil supply channel (205) and a first oil return channel (207); the first oil supply channel (205) is located at the top of the bearing housing (2) and is arranged in the radial direction, and the first oil return channel (207) is located at the bottom of the bearing housing (2) and is arranged in the axial direction; Along the corresponding circumferential position of the second positioning surface (204), the housing body of the bearing housing (2) is provided with a second oil supply channel (206) and a second oil return channel (208); the second oil supply channel (206) is located at the top of the bearing housing (2) and is arranged in the radial direction, and the second oil return channel (208) is located at the bottom of the bearing housing (2) and is arranged in the axial direction; On the outside of the first oil return channel (207) and the second oil return channel (208), the housing body of the bearing housing (2) is further provided with a total oil return port (209), and the total oil return port (209) is located at the bottom of the first flange (201).

6. A gas powered device as defined in claim 5, wherein, The power section comprises a turbine shaft (7), a mounting section (8) and a turboshaft engine (9); One end of the turbine shaft (7) is keyed to the adapter shaft (6), and the other end is drivingly connected to the turboshaft engine (9); One end of the mounting section (8) is bolted to the bearing housing (2), and the other end is bolted to the turboshaft engine (9); The turbine shaft (7) is located inside the mounting section (8).

7. An assembly method for assembling a gas power plant according to any one of claims 1-6, characterized in that The method comprises the following steps: Connecting the volute housing (1) and the bearing housing (2); Passing the rotor assembly (5) through the volute housing (1) into the bearing housing (2); Assembling the impeller cover (3) to the volute housing (1) to obtain a gas supply unit body comprising the volute housing (1), the bearing housing (2) and the impeller cover (3); Drivingly connecting the gas supply unit body to the power section through the adapter shaft (6).

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