Air supply power device and assembling method

Abstract

The invention belongs to the technical field of turbine power devices, and provides an air supply power device and an assembling method.The air supply power device comprises a load section, a power section, a rotor assembly and an adapter shaft; the rotor assembly is in transmission connection with the coupling shaft in the axial direction. The end, away from the rotor assembly, of the coupling shaft is in transmission connection with the power section. The load section is mounted at one end of the rotor assembly away from the coupling shaft; a bearing casing is connected between the load section and the power section and located on the outer side of the rotor assembly. According to the air supply power device, the power section transmits power to the rotor assembly through the adapter shaft, a 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 matched with other equipment, and therefore the adaptability and expansibility are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of turbine power devices, and in particular relates to an air supply power device and an assembly method thereof. Background Art

[0002] As a typical aviation turbine power unit, the auxiliary (air supply) power unit has the main function of providing high-pressure gas to the aircraft, but its air supply is mainly used to start the aircraft's main engine and the aircraft cabin's air conditioning system. According to its functional characteristics, it can also be used to provide high-pressure gas under the wings of fixed-wing aircraft. Figure 1 As shown, its main structure is divided into a load section and a power section, which match each other and cannot be separated and used separately. The power section mainly includes a combustion chamber and a turbine. The load section and the power section rotating parts are connected by a long shaft and pre-tightened to form a rotor system. Pivot 1 and fulcrum 2 constitute the support system of the double-pivot rotor. Therefore, in the existing auxiliary power unit, the load compressor air supply section is not an independent device. The load section and the power section match each other and cannot be separated and used separately, and have poor adaptability and scalability. Summary of the invention

[0003] In order to solve the problems in the background technology, the present invention provides an air supply power device and an assembly method.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An air supply power device comprises a load section, a power section, a rotor assembly and a transfer shaft;

[0006] The rotor assembly is axially connected to the adapter shaft in transmission connection, and one end of the adapter shaft away from the rotor assembly is connected to the power section in transmission connection;

[0007] The load section is mounted on an end of the rotor assembly away from the adapter shaft;

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

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

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

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

[0012] A roller bearing and a ball bearing are connected between the shaft body and the bearing casing;

[0013] Along the axial direction of the shaft body, 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, and the spline is used to be connected with the adapter shaft key.

[0015] Preferably, a first nut is installed on the shaft body at a position adjacent to the roller bearing, and the first nut is used to abut against the roller bearing along the axial direction of the shaft body;

[0016] A second nut is installed on the shaft body adjacent to the ball bearing, and the second nut is used to abut the ball bearing along the axial direction of the shaft body; and a baffle is also arranged above the second nut, and the baffle is fixedly connected to the bearing casing and abuts the ball bearing along the axial direction.

[0017] Preferably, the load section comprises a volute casing and an impeller cover;

[0018] The volute casing and the impeller cover are both arranged on the circumference of the centrifugal impeller;

[0019] The inner cavity of the volute casing is an annular cavity, and the cross section of the annular cavity is an annularly gradually changing cross section;

[0020] The casing body at the air inlet of the volute casing is provided with a first mounting edge and a second mounting edge;

[0021] The first mounting edge is connected to the impeller cover by bolts;

[0022] The second mounting edge is connected to the bearing casing via bolts.

[0023] Preferably, a plurality of support plates are arranged in the annular cavity of the volute casing along the circumferential direction;

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

[0025] Preferably, in the rotor assembly, the circumferential surface of the shaft body is further provided with comb teeth;

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

[0027] The comb teeth are in sealing contact with the coating.

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

[0029] The first flange edge is bolted to the first mounting edge;

[0030] The second flange edge is connected to the load section by bolts;

[0031] The first positioning surface and the second positioning surface are sequentially arranged at the protruding positions of the inner wall of the bearing casing along the axial direction, and are used for rotationally cooperating with the shaft body through the bearing.

[0032] Preferably, a first oil supply channel and a first oil return channel are provided on the housing of the bearing housing at a circumferential position corresponding to the first positioning surface; the first oil supply channel is located at the top of the bearing housing and is arranged radially, and the first oil return channel is located at the bottom of the bearing housing and is arranged axially;

[0033] A second oil supply channel and a second oil return channel are provided on the housing of the bearing housing at a circumferential position corresponding to the second positioning surface; the second oil supply channel is located at the top of the bearing housing and is arranged radially, and the second oil return channel is located at the bottom of the bearing housing and is arranged axially;

[0034] A total oil return port is also provided on the housing of the bearing housing 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 includes a turbine shaft, a mounting section and a turboshaft engine;

[0036] One end of the turbine shaft is key-connected to the adapter shaft, and the other end is transmission-connected to the turboshaft engine;

[0037] One end of the mounting section is bolted to the bearing casing, and the other end is bolted to the turboshaft engine;

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

[0039] An assembly method for assembling the above-mentioned air supply power device comprises the following steps:

[0040] Connecting the volute casing to the bearing casing;

[0041] Install the rotor assembly through the volute casing into the bearing casing;

[0042] Assembling the impeller cover to the volute casing to obtain an air supply unit body including the volute casing, the bearing casing and the impeller cover;

[0043] The air supply unit body is transmission connected to the power section through a transfer shaft.

[0044] Beneficial effects of the present invention:

[0045] 1. The power section of the air supply power device of the present invention transmits power to the rotor assembly through a transfer shaft. This structure abandons the traditional integrated rotor structure, so that the load section and the power section can be separated into two independent devices. Each independent device can be adapted to other equipment, thereby improving adaptability and scalability;

[0046] 2. When assembling the air supply power device of the present invention, the volute casing, outer wheel cover, bearing casing and rotor assembly can be pre-integrated into an air supply unit, and then the entire air supply unit can be installed on the power section. The assembly process does not need to consider the adaptation of the rotor assembly and the power section, but only needs to be transferred through an intermediate transfer shaft, which improves the flexibility of adapting different types of load sections and power sections.

[0047] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

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

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

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

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

[0055] Figure 7 A flow chart showing the assembly method of the present invention is shown.

[0056] In the figure: 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. total 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 cover; 507. spline; 508. shaft body; 509. comb teeth; 6. adapter shaft; 7. turbine shaft; 8. mounting section; 9. turboshaft engine. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] A gas powered device, such as Figure 1 As shown, it includes a load section, a power section, a rotor assembly 5 and an adapter shaft 6. The rotor assembly 5 is axially connected to the adapter shaft 6, and the end of the adapter 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 adapter shaft 6; in addition, an annular bearing casing 2 is connected between the load section and the power section, and the rotor assembly 5 is rotatably installed inside the bearing casing 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, so that the load section and the power section can be split into two independent devices, each of which can be adapted to other equipment, thereby improving adaptability and scalability.

[0060] Combine the following Figure 2-Figure 6 The air supply power device is further described.

[0061] like Figure 3As shown, the rotor assembly 5 includes a centrifugal impeller 501 and a shaft body 508 integrally connected to the centrifugal impeller 501. The centrifugal impeller 501 is located at the front end of the shaft body 508, and a plug cover 506 is installed at the end of the centrifugal impeller 501. A roller bearing 502 is connected between the middle section of the shaft body 508 and the bearing casing 2, a ball bearing 503 is connected between the rear section of the shaft body 508 and the bearing casing 2, and a spline 507 is provided at the end of the shaft body 508 away from the centrifugal impeller 501, and the spline 507 is used to be key-connected with the adapter shaft 6. In addition, 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 to abut the roller bearing 502 axially along 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 to abut the ball bearing 503 axially along the shaft body 508, and a baffle 4 is also provided above the second nut 505, and the baffle 4 is fixedly connected to the bearing casing 2, and abuts the ball bearing 503 axially.

[0062] It should be noted that through Figure 3 It can be seen that the position where the roller bearing 502 and the ball bearing 503 are installed on the shaft body 508 is provided with a step surface, the inner ring of the bearing is installed on the step surface, and the outer ring is in contact with the inner wall of the bearing casing 2, thereby ensuring the stability of the shaft body 508 during rotation. In addition, the first nut 504 and the second nut 505 can abut the corresponding bearing from one side of the step surface, thereby preventing the bearing from moving along the radial direction of the shaft body 508.

[0063] It should be further explained that an open groove is provided at one end of the shaft body 508 , and a spline 507 is arranged on the inner wall of the open groove. When connected with the adapter shaft 6 , the adapter shaft 6 is embedded in the open groove, and the spline 507 is inserted into 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 cover 3, both of which are arranged around the centrifugal impeller 501. Such a layout helps to optimize the airflow path and reduce energy loss, thereby improving the efficiency and performance of the engine. The inner cavity of the volute casing 1 is an annular cavity, and the cross section of the annular cavity is an annular gradient cross section. The main function is to collect compressed gas and supply air to the outside along the channel, which is conducive to the smooth transition of the airflow, reducing eddy currents and turbulence, and can also effectively improve the compression efficiency of the gas, so that the engine can 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, wherein 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, a plurality of support plates 103 are provided in the annular cavity of the volute casing 1 along the circumferential direction; 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, which not only enhances the structural strength of the volute casing 1 and prevents it from being deformed or broken under high pressure and high temperature environment, but also effectively guides the airflow, reduces the scouring and wear of the airflow on the inner wall of the volute casing 1, and prolongs 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 body 508 is further provided with a comb tooth 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 body 508, and the end of the back plate 105 is provided with an aluminum silicon coating 104, and the comb tooth 509 can be in sealing contact with the aluminum silicon coating 104 ( Figure 4 A in the middle), forming a bearing cavity lubricating oil sealing system; and the aluminum silicon coating 104 can prevent the comb teeth 509 from being scratched and damaged.

[0066] like Figure 6 As shown, the bearing casing 2 includes a first flange 201, a second flange 202, a first positioning surface 203, and a second positioning surface 204. The first flange 201 is connected to the first mounting edge 101 by bolts, and the second flange 202 is connected to the load section by bolts. The first positioning surface 203 and the second positioning surface 204 are sequentially arranged in the axial direction at the raised portion of the inner wall of the bearing casing 2 to ensure accurate rotational fit between the bearing and the shaft body 508.

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

[0068] In order to further optimize the performance, the casing of the bearing casing 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 casing 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 roller bearing 502 and the ball bearing 503 from the top of the bearing casing 2 through the first oil supply channel 205 and the second oil supply channel 206 to provide lubrication. Then, under the action of gravity, the lubricating oil flows to the bottom of the bearing casing 2, 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] Furthermore, in order to facilitate oil return, the main oil return port 209 can be opened outside the first oil return channel 207 and the second oil return channel 208 and arranged on the casing of the bearing casing 2, and can be specifically opened at the bottom of the first flange 201.

[0071] Combination Figure 1 It can be seen that the power section includes a turbine shaft 7, a mounting node 8 and a turboshaft engine 9. One end of the turbine shaft 7 is key-connected to the adapter shaft 6, and the other end is transmission-connected to the turboshaft engine 9; one end of the mounting node 8 is bolted to the bearing casing 2, and the other end is bolted to the turboshaft engine 9; the turbine shaft 7 is located on the inner side of the mounting node 8.

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

[0073] like Figure 7 As shown, an assembly method is used to assemble the above-mentioned air supply power device, comprising the following steps:

[0074] S1: Connect the volute casing 1 and the bearing casing 2.

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

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

[0077] S4: The air supply unit is connected to the power section through the adapter shaft 6.

[0078] by Figure 2 For example, during assembly, the volute casing 1 and the bearing casing 2 are first connected together by bolts; then the assembled rotor assembly 5 (without the ball bearing 503 and the second nut 505) is installed from the front through the volute casing 1 into the bearing casing 2, and then the ball bearing 503 and the second nut 505 are installed in sequence from the back, and then 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 installation edge 101 of the volute casing 1 to complete the assembly of the entire air supply section unit. Then the air supply section unit is assembled on 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 segments and power segments. The structural features at both ends of the adapter shaft 6 can be designed according to the shaft body 508 and the turbine shaft 7 that need to be adapted to ensure that a transmission connection can be achieved between the two, thereby improving the flexibility of adapting different types of load segments and power segments.

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

Claims

1. A gas supply power device, characterized in that: It comprises a load section, a power section, a rotor assembly (5) and a transfer shaft (6); The rotor assembly (5) is transmission-connected to the adapter shaft (6) along the axial direction, and one end of the adapter shaft (6) away from the rotor assembly (5) is transmission-connected to the power section; The load section is mounted on an end of the rotor assembly (5) away from the adapter shaft (6); A bearing casing (2) is connected between the load section and the power section, and the bearing casing (2) is located outside the rotor assembly (5).

2. The air supply power device according to claim 1, characterized in that: The rotor assembly (5) comprises a centrifugal impeller (501) and a shaft (508) integrally connected to the centrifugal impeller (501); The centrifugal impeller (501) is located at one end of the shaft (508); A plugging cover (506) is installed at the end of the centrifugal impeller (501); A roller bearing (502) and a ball bearing (503) are connected between the shaft body (508) and the bearing casing (2); Along the axial direction of the shaft body (508), the centrifugal impeller (501), the roller bearing (502) and the ball bearing (503) are arranged in sequence; The end of the shaft body (508) away from the centrifugal impeller (501) is provided with a spline (507), and the spline (507) is used for key connection with the adapter shaft (6).

3. The air supply power device according to claim 2, characterized 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 to abut against the roller bearing (502) along the axial direction of the shaft body (508); A second nut (505) is installed on the shaft (508) at a position adjacent to the ball bearing (503), and the second nut (505) is used to abut the ball bearing (503) along the axial direction of the shaft (508); and a baffle (4) is also arranged above the second nut (505), and the baffle (4) is fixedly connected to the bearing casing (2) and abuts against the ball bearing (503) along the axial direction.

4. The air supply power device according to claim 2, characterized in that: The load section comprises a volute casing (1) and an impeller cover (3); The volute casing (1) and the impeller cover (3) are both arranged on the circumference of the centrifugal impeller (501); The inner cavity of the volute casing (1) is an annular cavity, and the cross section of the annular cavity is an annularly gradually changing cross section; The casing body at the air inlet of the volute casing (1) is provided with a first mounting edge (101) and a second mounting edge (102); The first mounting edge (101) is connected to the impeller cover (3) via bolts; The second mounting edge (102) is connected to the bearing casing (2) via bolts.

5. The air supply power device according to claim 4, characterized in that: A plurality of support plates (103) are also arranged in the annular cavity of the volute casing (1) along the circumferential direction; 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).

6. The air supply power device according to claim 4, characterized in that: In the rotor assembly (5), the circumferential surface of the shaft body (508) is further provided with comb 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 a coating; The comb teeth (509) are in sealing contact with the coating.

7. The air supply power device according to claim 4, characterized in that: The bearing casing (2) comprises 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 bolted to the first mounting edge (101); The second flange edge (202) is connected to the load section via bolts; The first positioning surface (203) and the second positioning surface (204) are sequentially arranged at raised positions on the inner wall of the bearing casing (2) along the axial direction, and are used for rotationally cooperating with the shaft body (508) through the bearing.

8. The air supply power device according to claim 7, characterized in that: A first oil supply channel (205) and a first oil return channel (207) are provided on the housing of the bearing housing (2) at a circumferential position corresponding to the first positioning surface (203); the first oil supply channel (205) is located at the top of the bearing housing (2) and is arranged radially, and the first oil return channel (207) is located at the bottom of the bearing housing (2) and is arranged axially; A second oil supply channel (206) and a second oil return channel (208) are provided on the housing of the bearing housing (2) at a circumferential position corresponding to the second positioning surface (204); the second oil supply channel (206) is located at the top of the bearing housing (2) and is arranged radially, and the second oil return channel (208) is located at the bottom of the bearing housing (2) and is arranged axially; A total oil return port (209) is also provided on the casing body of the bearing casing (2) outside the first oil return channel (207) and the second oil return channel (208), and the total oil return port (209) is located at the bottom of the first flange edge (201).

9. The air supply power device according to claim 8, characterized in that: 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 key-connected 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 casing (2), and the other end is bolted to the turboshaft engine (9); The turbine shaft (7) is located inside the mounting joint (8).

10. An assembly method for assembling an air supply power device according to any one of claims 4 to 9, characterized in that: The following steps are involved: Connecting the volute casing (1) to the bearing casing (2); Install the rotor assembly (5) through the volute casing (1) into the bearing casing (2); Assembling the impeller cover (3) to the volute casing (1) to obtain an air supply unit body including the volute casing (1), the bearing casing (2) and the impeller cover (3); The air supply unit body is transmission-connected to the power section via a transfer shaft (6).

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