Turbojet engine system

Abstract

The utility model relates to a turbojet engine system, which comprises an engine main body, an air inlet casing, a main shaft rotationally arranged in the air inlet casing and a turbine arranged on the main shaft; the engine further comprises an integrated starting motor arranged in the air inlet casing, the air inlet casing is provided with an air inlet channel and an installation cavity formed in the air inlet channel, and the outer circumferential wall of the installation cavity and the inner circumferential wall of the air inlet channel are connected through guide plate supports arranged at intervals in the circumferential direction. The starting and generating integrated motor comprises a stator and a rotor, the stator is arranged in the mounting cavity and is fixed relative to the mounting cavity, the end part of the main shaft extends into the mounting cavity, and the rotor is arranged on the main shaft and can rotate along with the main shaft. The utility model has the advantages of effectively simplifying the transmission mechanism of engine accessories and reducing the overall size of the engine.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a turbojet engine system. Background Art

[0002] A turbojet engine system is generally equipped with a starter and a generator. The starter and the generator are generally located in the accessory casing on the outside of the engine and are connected to the engine shaft through a special transmission mechanism. This structure is complex, large in size and weight, and has a high failure rate. For example, the Chinese invention patent application with application number CN202010040509.4 discloses this engine system.

[0003] However, at this stage, with the development of the aviation industry, lightweight, integrated and modular design has become a development trend and goal. How to provide a transmission mechanism that can effectively simplify engine accessories, reduce the overall size of the engine, and then realize a lightweight and modular design engine system has become a technical problem that technical personnel in this field need to solve urgently. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a turbojet engine system which can effectively simplify the transmission mechanism of engine accessories and reduce the overall size of the engine in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a turbojet engine system, comprising:

[0006] The engine body comprises an air intake casing and a main shaft rotatably arranged in the air intake casing, wherein a turbine is arranged on the main shaft;

[0007] It also includes an integrated starter motor built into the air intake casing, the air intake casing has an air intake passage and an installation chamber arranged in the air intake passage, the outer circumferential wall of the installation chamber is connected to the inner circumferential wall of the air intake passage through a guide plate bracket arranged at intervals along the circumferential direction, the integrated starter motor includes a stator and a rotor, the stator is arranged in the installation chamber and fixed relative to the installation chamber, the end of the main shaft extends into the installation chamber, the rotor is arranged on the main shaft and can rotate with the main shaft.

[0008] As an improvement, the rotor is connected to the main shaft through keyway matching transmission.

[0009] In order to install the stator of the starting-in-one motor into the installation chamber and fix it firmly relative to the installation chamber, a positioning groove extending axially is provided on the inner circumferential wall of the installation chamber, and the outer circumferential wall of the stator has a positioning rib protruding radially outward and extending axially, and the positioning rib is limited in the positioning groove.

[0010] In order to limit the stator of the starting-in-one motor in the axial direction to prevent it from moving or shaking in the axial direction, the inner circumferential wall of the installation chamber also has a limit stop portion extending radially inward to abut against the end of the stator, and the other end of the stator abuts against a retaining ring detachably connected to the inner circumferential wall of the installation chamber.

[0011] In order to allow air to enter smoothly and reduce air intake resistance, the outer wall surface of the installation chamber is constructed as a cylindrical structure.

[0012] In order to further improve the flow guiding effect and reduce the wind resistance, the installation chamber is located in the middle of the air intake passage, and a conical flow guiding end is provided at the windward end of the air intake passage.

[0013] As an improvement, in order to make the entire engine system structure more compact, it also includes a centrifugal ventilator which is mounted outside the main shaft and can be driven to rotate by the main shaft. The centrifugal ventilator and the rotor are adjacent to each other in the axial direction of the main shaft, and one of the centrifugal ventilator and the rotor is provided with a slot, and the other is provided with a middle block which can be embedded in the slot.

[0014] In order to ensure the transmission effect, the centrifugal ventilator is connected to the main shaft through a spline.

[0015] Compared with the prior art, the utility model has the following advantages: the turbojet engine system of the utility model is to build the starter-integrated motor into the air intake casing of the main body of the turbojet engine, specifically, the motor rotor is installed on the main shaft, and the motor stator is installed on the air intake casing, thereby greatly reducing the number of parts of the engine system, making the engine structure compact, the outer dimensions reduced, the weight reduced, and the failure rate reduced. When the engine is started, the external power source drives the starter-integrated motor to rotate, thereby driving the main shaft of the engine to start. After the start is completed, the starter-integrated motor switches to the power generation mode, and the main shaft of the engine drives the starter-integrated rotor to rotate to generate electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the engine system of the embodiment of the utility model (omitting components such as the turbine and the combustion chamber);

[0017] Figure 2 An exploded view of an engine system according to an embodiment of the present utility model;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of an air intake casing of an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the three-dimensional structure of the air intake casing of the embodiment of the utility model from another angle;

[0020] Figure 5 A schematic diagram of the three-dimensional structure of a centrifugal ventilator according to an embodiment of the utility model;

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the rotor of the starting-in-one motor according to an embodiment of the utility model;

[0022] Figure 7 for Figure 1 An axial cross-sectional view of the engine system in FIG. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0025] Figure 1-Figure 7 A preferred embodiment of the turbojet engine system of the utility model is shown. A turbojet engine system includes an engine body and a starter-in-one motor, wherein the engine body includes an intake casing 1, a main shaft 13, a compressor, a diffuser, a combustion chamber and a turbine. In the drawings of this embodiment, components such as the turbine, the diffuser, and the combustion chamber are all shown. The compressor and the turbine are coaxially connected through the main shaft 13, wherein the compressor is a centrifugal compressor, and the diffuser is arranged between the compressor and the combustion chamber. An installation channel for the main shaft 13 to pass through is defined on the intake casing 1, and a bearing sleeved outside the main shaft 13 is provided in the installation channel.

[0026] See also Figure 3 and Figure 4 The air intake casing 1 has an air intake passage 10 and an installation chamber 11 disposed in the air intake passage 10. The outer peripheral wall of the installation chamber 11 is connected to the inner peripheral wall of the air intake passage 10 through a guide plate bracket 12 arranged at intervals along the circumferential direction. The cross section of the guide plate bracket 12 is arranged to extend along the extension direction of the air intake passage 10. Figure 3 As shown, there are three guide plate brackets 12 , which are evenly spaced apart along the circumference of the air intake passage 10 .

[0027] The installation chamber 11 of the air intake casing 1 is located in the middle of the air intake passage 10. The outer wall of the installation chamber 11 is constructed as a cylindrical structure. In order to further improve the flow guidance effect and reduce the wind intake resistance, a conical flow guidance end 112 is provided at the windward end of the cylindrical installation chamber 11 in the air intake passage 10.

[0028] The starter-starter motor of this embodiment is built into the installation chamber 11 in the air intake casing 1. Specifically, the starter-starter motor includes a stator 22 and a rotor 21, wherein the stator 22 is arranged in the installation chamber 11 and fixed relative to the installation chamber 11. More specifically, a positioning groove 110 extending in the axial direction is provided on the inner peripheral wall of the installation chamber 11, and there are three positioning grooves 110 arranged at intervals in the circumferential direction. Correspondingly, the outer peripheral wall of the stator 22 has three positioning ribs 221 protruding radially outward and extending in the axial direction. During installation, the positioning rib 221 of the stator 22 can be aligned with the positioning groove 110 on the installation chamber 11, and then the stator 22 can be pushed into the installation chamber 11 so that the positioning rib 221 is limited in the positioning groove 110, thereby limiting the stator 22 in the circumferential direction. After the stator 22 is installed in place, in order to limit its axial position and prevent it from moving or shaking in the axial direction, the inner peripheral wall of the installation chamber 11 is also provided with a limit stopper 111 extending radially inward to abut against the end of the stator 22. The limit stopper 111 of this embodiment is an annular stopper structure. The other end of the stator 22 is limited by a retaining ring 15. Specifically, an annular groove can be provided on the inner wall of the installation chamber 11. After the retaining ring 15 is embedded in the annular groove, it abuts against the other end of the stator 22, thereby realizing the axial limit of the stator 22.

[0029] The end of the main shaft 13 of the engine body extends into the installation chamber 11, and the rotor 21 of the starter motor is installed on the main shaft 13 and can rotate with the main shaft 13. Specifically, the rotor 21 is connected to the main shaft 13 through keyway matching transmission. The centrifugal ventilator 14 is also sleeved outside the main shaft 13 and can be driven by the main shaft 13 to rotate, and separate the oil-gas mixture in the lubricating oil chamber. The centrifugal ventilator 14 is connected to the main shaft 13 through a spline, and the corresponding part on the main shaft 13 is a spline shaft 130, and the shaft hole part of the centrifugal ventilator 14 is correspondingly set as a spline sleeve 140. The centrifugal ventilator of this embodiment is adjacent to the rotor 21 in the axial direction of the main shaft 13, and the side edge of the shaft hole part of the centrifugal ventilator 14 is provided with an insert block 162 protruding toward one side of the rotor 21, and the end of the rotor 21 is correspondingly provided with a slot 161 for the insert block 162 to be inserted into it, thereby, the power can also be transmitted to the centrifugal ventilator through the rotor 21. The above-mentioned matching structure of the centrifugal ventilator and the rotor 21 also makes the structure of the entire engine system more compact and the volume is further reduced.

[0030] This embodiment integrates the starter-integrated motor into the engine system, so that the motor rotor 21 is connected to the main shaft 13, eliminating a large number of transmission mechanisms, with a simple and direct structure, reducing the complexity of the system structure, reducing the manufacturing and maintenance costs, and not affecting the strength design of other rotor 21 components. The motor stator 22 is installed on the air intake casing 1. The motor stator 22 is embedded in the air intake casing 1, which does not affect the main structure of the engine, thereby reducing the space occupied by the accessory system for the overall engine. On the other hand, the engine system with a built-in starter-integrated motor also greatly reduces the number of parts of the engine system, making the engine structure compact, the outer dimensions reduced, the weight reduced, and the failure rate reduced. When the engine is started, the external power supply drives the starter-integrated motor to rotate, thereby driving the main shaft 13 of the engine to start. After the start is completed, the starter-integrated motor switches to the power generation mode, and the main shaft 13 of the engine drives the starter-integrated rotor 21 to rotate to generate electricity. Furthermore, placing the starter-integrated motor at the front end of the engine makes it easy to introduce low-temperature gas to cool the motor, thereby improving the working efficiency and life of the motor. While meeting the engine requirements, it makes good use of the internal space of the engine, greatly improves the integration of the engine and reduces the number of parts.

Claims

1. A turbojet engine system, comprising: The engine body comprises an air intake casing (1) and a main shaft (13) rotatably arranged in the air intake casing (1), wherein a turbine is arranged on the main shaft (13); The invention is characterized in that it also includes a starting-starting motor built into the air intake casing (1), the air intake casing (1) having an air intake passage (10) and an installation chamber (11) arranged in the air intake passage (10), the outer peripheral wall of the installation chamber (11) and the inner peripheral wall of the air intake passage (10) are connected via a guide plate bracket (12) arranged at intervals along the circumferential direction, the starting-starting motor includes a stator (22) and a rotor (21), the stator (22) is arranged in the installation chamber (11) and fixed relative to the installation chamber (11), the end of the main shaft (13) extends into the installation chamber (11), the rotor (21) is arranged on the main shaft (13) and can rotate with the main shaft (13).

2. The turbojet engine system according to claim 1, characterized in that: The rotor (21) is connected to the main shaft (13) through keyway matching transmission.

3. The turbojet engine system according to claim 1, characterized in that: The inner peripheral wall of the installation chamber (11) is provided with a positioning groove (110) extending in the axial direction, and the outer peripheral wall of the stator (22) has a positioning rib (221) protruding radially outward and extending in the axial direction, and the positioning rib (221) is limited in the positioning groove (110).

4. The turbojet engine system according to claim 3, characterized in that: The inner peripheral wall of the installation chamber (11) also has a limit stopper (111) extending radially inwardly to abut against the end of the stator (22), and the other end of the stator (22) abuts against a retaining ring (15) detachably connected to the inner peripheral wall of the installation chamber (11).

5. The turbojet engine system according to any one of claims 1 to 4, characterized in that: The outer wall surface of the installation chamber (11) is configured as a cylindrical structure.

6. The turbojet engine system according to claim 5, characterized in that: The installation chamber (11) is located in the middle of the air inlet passage (10), and a conical flow guide end (112) is provided at the windward end of the air inlet passage (10).

7. The turbojet engine system according to any one of claims 1 to 4, characterized in that: It also includes a centrifugal ventilator (14) which is sleeved outside the main shaft (13) and can be driven to rotate by the main shaft (13); the centrifugal ventilator (14) and the rotor (21) are arranged adjacent to each other in the axial direction of the main shaft (13); one of the centrifugal ventilator (14) and the rotor (21) is provided with a slot (161), and the other is provided with a middle plug (162) which can be embedded in the slot (161).

8. The turbojet engine system according to claim 7, characterized in that: The centrifugal ventilator is connected to the main shaft (13) via a spline.

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