engine

Abstract

The application relates to the technical field of power equipment, and discloses an engine which comprises a rotating shaft, a first air compressor, a second air compressor and a sealing unit. The sealing unit can reduce the contact area between the second airflow and the first end tooth, and reduce the influence of the second airflow on the temperature of the first end tooth. The first through hole can guide the first airflow to the position of the first end tooth, and cool the first end tooth, so that the first end tooth can withstand the temperature inside the engine after being made of light alloy, and the service life of the first end tooth is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to an engine. BACKGROUND

[0002] In the field of aviation technology, an engine is an essential power device, and a compressor is an important component of the engine. The fluid is moved by the impeller on the compressor to compress the fluid. The compressed fluid enters the combustion chamber and mixes with the fuel in the combustion chamber to burn and produce high-temperature and high-pressure gas. Finally, the gas is ejected through the nozzle connected to the combustion chamber as the power of the engine. The end face of the impeller is provided with an end tooth to connect other components through the end tooth, and the stability of the impeller transmission can be improved by providing the end tooth.

[0003] The existing engine includes a two-stage compressor, a rotating shaft and an isolation structure. The two-stage compressor is an axial compressor and a centrifugal compressor. The axial compressor and the centrifugal compressor are both spaced apart and sleeved on the rotating shaft. The airflow of the engine enters the intake port of the axial compressor, and is divided into two flow paths, i.e., a first airflow and a first main flow path, after being compressed by the axial compressor.

[0004] The first airflow flows downstream (away from the axial compressor) along the axis direction parallel to the rotating shaft. The first main flow path passes through the centrifugal compressor. The centrifugal compressor includes a first gas outlet and a second gas outlet. The first gas outlet is provided through the root of the impeller of the centrifugal compressor, and the second gas outlet is provided towards the combustion chamber. The gas of the first main flow path forms a second main flow path through the second gas outlet and enters the combustion chamber. The gas of the first main flow path forms a second airflow through the first gas outlet. The second airflow passes through the gas outlet of the centrifugal compressor and along the surface of the centrifugal compressor. After passing through the first end tooth, the second airflow flows downstream along the axis direction of the rotating shaft. Since the second airflow passes through the inside of the centrifugal compressor, the temperature of the second airflow is higher than that of the first airflow.

[0005] The isolation structure is used to isolate the first airflow and the second airflow. During the downstream flow of the first airflow and the second airflow, the first airflow and the second airflow flow along the two sides of the isolation structure to avoid the mixing of the first airflow and the second airflow affecting the cooling effect of the downstream engine structure. Specifically, the isolation structure rotates synchronously with the centrifugal compressor. The end portion of the centrifugal compressor is provided with a first end tooth, and the end portion of the isolation structure is provided with a second end tooth. The rotation of the centrifugal compressor drives the rotation of the isolation structure through the meshing of the first end tooth and the second end tooth.

[0006] In the process, the second airflow flows to one side of the isolation structure through the gap passing through the meshing position of the first end tooth and the second end tooth, and the temperature of the second airflow causes the temperature of the first end tooth and the second end tooth to rise. Due to the increasing requirements of existing engines on cycle parameters and thrust-to-weight ratio, the impeller, the first end tooth and the second end tooth need to be made of light alloy, which causes the first end tooth and the second end tooth to have weak heat resistance and be unable to withstand the temperature of the second airflow, resulting in failure of the first end tooth and the second end tooth and affecting the normal use of the engine. SUMMARY

[0007] Therefore, the present application provides an engine to solve the problem that the impeller, the first end tooth and the second end tooth of the existing engine are made of light alloy, causing the impeller end tooth to fail to withstand the heat inside the engine and affecting the normal use of the engine.

[0008] The present application provides an engine, comprising:

[0009] a rotating shaft;

[0010] a first compressor rotatably connected to the rotating shaft, one end of the first compressor being provided with an air inlet, and the other end of the first compressor being provided with a first air outlet and a second air outlet, air flowing out of the first air outlet forming a first airflow;

[0011] a second compressor rotatably connected to the rotating shaft and arranged on one side of the first compressor, the second compressor comprising a main body and a blade root connected thereto, one end of the main body being in communication with the second air outlet, and the other end of the main body being provided with a third air outlet in communication with the second air outlet, air flowing out of the third air outlet forming a second airflow, the temperature of the second airflow being higher than that of the first airflow, a first side of the blade root being located on a flow path of the first airflow, a second side of the blade root being located on a flow path of the second airflow, an end of the blade root away from the first compressor being provided with a first end tooth, and a first through hole being formed in the first side of the blade root towards the direction of the first end tooth, the first through hole being used for adjusting the first airflow flowing through the first end tooth;

[0012] a sealing unit arranged on the inner diameter of the first end tooth and / or the outer diameter of the first end tooth, used for isolating the first airflow and the second airflow on both sides of the first end tooth.

[0013] Beneficial effects: By setting the sealing unit, the sealing unit can reduce the contact area between the second airflow and the first end tooth, reduce the influence of the second airflow on the temperature of the first end tooth, and at the same time, by setting the first through hole, the first through hole can guide the first airflow to the position of the first end tooth to cool the first end tooth, so that the first end tooth can also withstand the temperature inside the engine after using light alloy, thereby achieving the technical effect of prolonging the service life of the first end tooth.

[0014] In an optional implementation, the sealing unit is arranged at the inner diameter of the first end tooth, and the sealing unit is made of heat-conducting material.

[0015] Beneficial effects: The sealing unit is arranged at the inner diameter of the first end tooth, which not only can block the first airflow and the second airflow, but also can avoid the flow of the second airflow through the gap of the first end tooth, thereby achieving the technical effect of reducing the contact area between the second airflow and the first end tooth and reducing the influence of the temperature of the second airflow on the temperature of the first end tooth. At the same time, the sealing unit is made of heat-conducting material, so that the temperature of the first airflow can be transmitted to the first end tooth through the sealing unit, that is, the first airflow cools the sealing unit to cool the first end tooth, thereby improving the cooling capacity of the first end tooth.

[0016] In an optional implementation, the sealing unit is arranged at the inner diameter of the first end tooth, and the sealing unit is made of heat-conducting material.

[0017] Beneficial effects: By protruding the heat-conducting part, the contact area between the first airflow and the sealing unit can be increased, so that the first airflow can better cool the sealing unit to improve the cooling effect of the first end tooth.

[0018] In an optional implementation, the plurality of heat-conducting parts are arranged in multiple rows and multiple columns.

[0019] And / or, the heat-conducting part is provided with a heat-conducting hole on the side surface and / or the end surface away from the sealing unit.

[0020] Beneficial effects: By arranging the plurality of heat-conducting parts in multiple rows and multiple columns, the connection points between the heat-conducting part and the sealing can be increased, thereby improving the cooling effect of the first end tooth.

[0021] And / or, the heat-conducting hole can further increase the contact area between the first airflow and the sealing unit, thereby achieving the technical effect of improving the cooling capacity of the sealing unit on the first end tooth.

[0022] In an optional implementation, one side of the blade root is provided with a cavity, and the cavity is arranged close to the first end tooth.

[0023] Beneficial effects: the setting of the cavity can reduce the weight of the blade root, reduce the inertial force borne by the blade root, and improve the dynamic response and reliability of the blade root.

[0024] In an alternative embodiment, the first side of the blade root is provided with a second through hole facing the direction of the cavity, and the second through hole is in communication with the cavity.

[0025] Beneficial effects: by passing the first airflow through the second through hole to cool the inside of the cavity, the temperature of the second compressor inside the cavity does not affect the cooling effect of the first end tooth, thereby achieving the technical effect of improving the cooling capacity of the first end tooth.

[0026] In an alternative embodiment, the central axis of the first through hole and the straight line passing through the first through hole and perpendicular to the rotating shaft form an angle.

[0027] Beneficial effects: by limiting the relationship between the first through hole and the straight line perpendicular to the rotating shaft, the speed of the first airflow can be divided into a component along the axis direction and a component along the circumferential direction, so as to increase the movement time of the first airflow along the circumferential direction, thereby improving the cooling effect of the first airflow on the structure around the first end tooth, reducing the heat energy transmitted to the first end tooth by the structure around the first end tooth, and further improving the cooling efficiency of the first end tooth.

[0028] In an alternative embodiment, the engine comprises:

[0029] The blocking unit comprises a second end tooth, which is in meshing connection with the first end tooth, and the sealing unit covers at least the meshing end of the second end tooth and the first end tooth along the axis direction of the rotating shaft.

[0030] Beneficial effects: the meshing position between the second end tooth and the first end tooth can be sealed by the sealing unit to prevent the second airflow from flowing to the first airflow through the gap of the meshing, increase the temperature of the first airflow, and affect the cooling effect of the first airflow on the internal structure of the engine.

[0031] In an alternative embodiment, the blocking unit comprises:

[0032] The first blocking part is spaced and sleeved on the rotating shaft, one end of the first blocking part is provided with the second end tooth, and the other end of the first blocking part extends away from the second end tooth;

[0033] The second blocking part is spaced and sleeved on the rotating shaft, the second blocking part is arranged close to the rotating shaft, one end of the second blocking part is fixedly connected to the first blocking part, the gap between the second blocking part and the rotating shaft is in communication with the cavity, and the other end of the second blocking part extends away from the first end tooth.

[0034] The first airflow flows along the side of the second blocking part close to the rotating shaft, and the second airflow flows along the side of the first blocking part away from the rotating shaft.

[0035] Beneficial effects: The first airflow and the second airflow are blocked by the first blocking part and the second blocking part, so that the mixing of the first airflow and the second airflow during the flowing is avoided, the temperature of the first airflow is not affected, and the cooling effect of the first airflow on the first end tooth and the second end tooth is further affected, so that the technical effect of improving the cooling capacity of the first end tooth and the second end tooth is achieved.

[0036] In an optional embodiment, the first blocking part is provided with a third through hole at an end away from the second end tooth, and the third through hole is used to guide the second airflow to the side of the second blocking part away from the rotating shaft.

[0037] Beneficial effects: The third through hole can guide the second airflow to the direction close to the rotating shaft, and based on this, the flowing paths of the first airflow and the second airflow away from the second compressor are not adjusted, that is, the first airflow and the second airflow still flow along the original flowing path in the related art, so that the technical effect of ensuring the degree of adjustment of the engine structure is reduced is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0039] Figure 1 It is a partial schematic view of an engine in the present embodiment;

[0040] Figure 2 It is a partial schematic view of a sealing unit in the present embodiment;

[0041] Figure 3 It is a front view of the sealing unit in the present embodiment;

[0042] Figure 4 It is a sectional view of the sealing unit in the present embodiment.

[0043] Explanation of reference signs:

[0044] 1, first compressor; 101, first air outlet; 102, first airflow;

[0045] 2, second compressor; 201, main body;

[0046] 202, blade root; 2021, cavity; 2022, first end tooth; 2023, second through hole;

[0047] 203, third air outlet; 204, second air flow; 205, first through hole;

[0048] 3, sealing unit;

[0049] 4, barrier unit; 401, first barrier part; 4011, second end tooth; 4012, third through hole;

[0050] 402, second barrier part;

[0051] 5, heat conduction part; 501, first hole; 502, second hole;

[0052] 6, center pull rod. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0054] The embodiments of the present application will be described below in conjunction with the drawings. Figures 1 to 4

[0055] According to the embodiments of the present application, an engine is provided, comprising:

[0056] rotating shaft;

[0057] The first air compressor 1 is rotationally connected to the rotating shaft. One end of the first air compressor 1 is provided with an air inlet, and the other end of the first air compressor 1 is provided with a first air outlet 101 and a second air outlet. The air flowing out of the first air outlet 101 forms a first air flow 102;

[0058] ​The second compressor 2 is rotationally connected to the rotating shaft and is arranged on one side of the first compressor 1. The second compressor 2 comprises a main body 201 and a blade root 202. One end of the main body 201 is in communication with the second air outlet. The other end of the main body 201 is provided with a third air outlet 203 in communication with the second air outlet. The air flowing out of the third air outlet 203 forms a second air flow 204. The temperature of the second air flow 204 is higher than that of the first air flow 102. The first side of the blade root 202 is located on the flow path of the first air flow 102. The second side of the blade root 202 is located on the flow path of the second air flow 204. The end of the blade root 202 away from the first compressor 1 is provided with a first end tooth 2022. The first side of the blade root 202 is provided with a first through hole 205 facing the direction of the first end tooth 2022. The first through hole 205 is used to adjust the flow of the first air flow 102 through the first end tooth 2022.

[0059] The sealing unit 3 is arranged on the inner diameter of the first end tooth 2022 and / or the outer diameter of the first end tooth 2022, and is used to isolate the first air flow 102 and the second air flow 204 on both sides of the first end tooth 2022.

[0060] In the engine of the embodiment, by arranging the sealing unit 3, the sealing unit 3 can reduce the contact area between the second air flow 204 and the first end tooth 2022, and reduce the influence of the second air flow 204 on the temperature of the first end tooth 2022. At the same time, by arranging the first through hole 205, the first through hole can guide the first air flow 102 to the position of the first end tooth 2022 to cool the first end tooth 2022, so that the first end tooth 2022 can also withstand the temperature inside the engine after using lightweight alloy, thereby achieving the technical effect of improving the service life of the first end tooth 2022.

[0061] In the embodiment, the inner diameter is the side of the first end tooth 2022 close to the rotating shaft, and the outer diameter is the side of the first end tooth 2022 away from the rotating shaft. The rotating shaft is not shown in the figure. The axis of the rotating shaft is arranged along the horizontal direction as shown. Figure 1

[0062] In addition, in the embodiment, the first compressor 1 is an axial compressor, and the second compressor 2 is a centrifugal compressor. The axial compressor and the centrifugal compressor are provided with a center pull rod 6 close to the rotating shaft. The center pull rod 6 is a necessary part of the engine, which will not be described here. The centrifugal compressor is arranged apart from the center pull rod 6. The first air flow 102 flows along the gap between the centrifugal compressor and the center pull rod 6 along the right direction as shown. Figure 1

[0063] Of course, in other embodiments, according to the type of engine, the type of the first compressor 1 and the type of the second compressor 2 can be adjusted.

[0064] ​​In addition, in the embodiment, the sealing unit 3 is arranged at the inner diameter of the first end tooth 2022, that is, the sealing unit 3 has a ring structure, and the sealing unit 3 can not only form a barrier to the first airflow 102 and the second airflow 204, but also can avoid the flow of the second airflow 204 through the gap of the first end tooth 2022, so as to reduce the contact area between the second airflow 204 and the first end tooth 2022, and reduce the temperature influence of the high-temperature second airflow 204 on the first end tooth 2022.

[0065] At the same time, the sealing unit 3 is made of a heat-conducting material, for example, the sealing unit 3 can be made of stainless steel, so that the temperature of the first airflow 102 can be transmitted to the first end tooth 2022 through the sealing unit 3, that is, the first airflow 102 cools the sealing unit 3 to cool the first end tooth 2022, thereby improving the cooling capacity of the first end tooth 2022. As a convertible embodiment, the material of the sealing unit 3 can also be copper or other materials with heat-conducting ability.

[0066] Of course, in other embodiments, the sealing unit 3 can be arranged at the outer diameter of the first end tooth 2022, so that the first end tooth 2022 can be completely blocked from the second airflow 204. At this time, the surface of the sealing unit 3 away from the first end tooth 2022 can be coated with heat insulation paint, or the material of the sealing unit 3 can be directly a heat insulation material, so that the first end tooth 2022 cannot be in contact with the second airflow 204, thereby improving the heat conduction effect of the sealing unit 3 on the first end tooth 2022.

[0067] In addition, in the embodiment, the sealing unit 3 is arranged at the inner diameter of the first end tooth 2022, that is, the sealing unit 3 has a ring structure, and the sealing unit 3 can not only form a barrier to the first airflow 102 and the second airflow 204, but also can avoid the flow of the second airflow 204 through the gap of the first end tooth 2022, so as to reduce the contact area between the second airflow 204 and the first end tooth 2022, and reduce the temperature influence of the high-temperature second airflow 204 on the first end tooth 2022. Figures 2 to 4 As shown in the figure, the side of the sealing unit 3 away from the first end tooth 2022 is provided with a plurality of heat-conducting parts 5, and the heat-conducting parts 5 are protrudingly arranged away from the first end tooth 2022.

[0068] Through the protruding arrangement of the heat-conducting parts 5, the contact area between the first airflow 102 and the sealing unit 3 can be increased, so that the first airflow 102 can better cool the sealing unit 3 to improve the cooling effect on the first end tooth 2022.

[0069] Among them, the plurality of heat-conducting parts 5 are arranged in multiple rows and multiple columns. Specifically, the plurality of heat-conducting parts 5 are arranged in a crisscross manner to form a mesh structure, so as to increase the connection points between the heat-conducting parts 5 and the sealing unit 3, thereby improving the cooling effect on the first end tooth 2022.

[0070] Of course, in other embodiments, the shape of the heat-conducting part 5 can be adaptively adjusted according to the design of the engine.

[0071] In other embodiments, the heat-conducting part 5 can also not be arranged, and the first airflow 102 only conducts heat to the first end tooth 2022 through the sealing unit 3.

[0072] In addition, in the present embodiment, in combination with Figures 2 to 4 As shown, the side surface of the heat conduction part 5 and the end surface of the heat conduction part 5 away from the sealing unit 3 are both provided with heat conduction holes.

[0073] The heat conduction holes can further increase the contact area between the first airflow 102 and the sealing unit 3, thereby achieving the technical effect of improving the cooling capacity of the sealing unit 3 on the first end tooth 2022.

[0074] Specifically, as Figure 2 shown, the heat conduction holes include a first hole 501 and a second hole 502, the first hole 501 is arranged on the side of the heat conduction part 5 away from the sealing unit 3. The second hole 502 is a through hole and is arranged on the side surface of the heat conduction part 5.

[0075] Further, in the present embodiment, taking one heat conduction part 5 as an example, the height h of the heat conduction part 5 is within the range of 0.2mm-0.8mm, the width d of the heat conduction part 5 is within the range of 0.5×h-1.5×h, and the spacing between adjacent heat conduction parts 5 in two directions, i.e. l1 and l2, is within the range of 2×h-3×h. The diameter of the first hole 501 is within the range of 0.6×d-0.8×d, and the diameter of the second hole 502 is within the range of 0.6×h-0.8×h. Based on the design of the above parameters, the cooling effect of the heat conduction part 5 of the present embodiment on the first end tooth 2022 is better.

[0076] Of course, in other embodiments, only multiple heat conduction parts 5 can be arranged in multiple rows and multiple columns. Alternatively, only the side surface of the heat conduction part 5 or the end surface of the heat conduction part 5 away from the sealing unit 3 is provided with heat conduction holes.

[0077] In addition, preferably, one side of the blade root 202 is provided with a cavity 2021, and the cavity 2021 is arranged close to the first end tooth 2022. Through the arrangement of the cavity 2021, the weight of the blade root 202 can be reduced, the inertial force borne by the blade root 202 can be reduced, and the dynamic response and reliability of the blade root 202 can be improved.

[0078] Further, the first side of the blade root 202 is provided with a second through hole 2023 facing the direction of the cavity 2021, and the second through hole 2023 communicates with the cavity 2021.

[0079] Based on this, the first airflow 102 can pass through the second through hole 2023 to cool the inside of the cavity 2021, so as to avoid the temperature of the second compressor 2 inside the cavity 2021 affecting the cooling effect of the first end tooth 2022, thereby achieving the technical effect of improving the cooling capacity of the first end tooth 2022.

[0080] In addition, preferably, the central axis of the first through hole 205 forms an angle with a straight line passing through the first through hole 205 and perpendicular to the rotation axis. Meanwhile, the central axis of the second through hole 2023 forms an angle with a straight line passing through the second through hole 2023 and perpendicular to the rotation axis. Based on this, the speed of the first airflow 102 can be divided into a component along the axial direction and a component along the circumferential direction, so as to increase the movement time of the first airflow 102 along the circumferential direction, thereby improving the cooling effect of the first airflow 102 on the structure around the first end tooth 2022, reducing the heat energy transmitted by the structure around the first end tooth 2022 to the first end tooth 2022, and further improving the cooling efficiency of the first end tooth 2022.

[0081] The specific degrees of the central axis of the first through hole 205 forming an angle with a straight line passing through the first through hole 205 and perpendicular to the rotation axis and the central axis of the second through hole 2023 forming an angle with a straight line passing through the second through hole 2023 and perpendicular to the rotation axis can be adjusted according to the actual design of the engine, and are not limited here.

[0082] Specifically, the diameter of the first through hole 205 is in the range of 0.8mm-1.2mm, and the diameter of the second through hole 2023 is in the range of 0.3mm-0.7mm. Meanwhile, the number of the first through hole 205 and the second through hole 2023 is at least 72 along the circumferential direction, so that more first airflow 102 can enter the cavity 2021 and the first end tooth 2022 to improve the cooling effect of the first end tooth 2022.

[0083] In addition, in the embodiment, the engine comprises:

[0084] The blocking unit 4 comprises a second end tooth 4011, which is engaged with the first end tooth 2022, and the sealing unit 3 covers at least the engagement end of the second end tooth 4011 and the first end tooth 2022 along the axial direction of the rotation axis. Based on this, the engagement position between the second end tooth 4011 and the first end tooth 2022 can be sealed by the sealing unit 3, so as to avoid the second airflow 204 flowing to the first airflow 102 through the gap of the engagement, increase the temperature of the first airflow 102, and affect the cooling effect of the first airflow 102 on the internal structure of the engine.

[0085] The blocking unit 4 comprises:

[0086] The first blocking part 401 is sleeved on the rotation axis, one end of the first blocking part 401 is provided with the second end tooth 4011, and the other end of the first blocking part 401 extends away from the second end tooth 4011;

[0087] The second blocking part 402 is sleeved on the rotating shaft, and the second blocking part 402 is arranged close to the rotating shaft. One end of the second blocking part 402 is fixedly connected to the first blocking part 401. The gap between the second blocking part 402 and the rotating shaft is in communication with the cavity 2021. The other end of the second blocking part 402 extends away from the first end tooth 2022.

[0088] The first airflow 102 flows along the side of the second blocking part 402 close to the rotating shaft, and the second airflow 204 flows along the side of the first blocking part 401 away from the rotating shaft.

[0089] By arranging the first blocking part 401 and the second blocking part 402, the first airflow 102 and the second airflow 204 can be blocked, so that the first airflow 102 and the second airflow 204 do not flow along the direction shown by the arrow A, and the mixing of the first airflow 102 and the second airflow 204 is avoided. Figure 1 The temperature of the first airflow 102 is affected, and the cooling effect of the first airflow 102 on the first end tooth 2022 and the second end tooth 4011 is further affected, so that the technical effect of improving the cooling capacity of the first end tooth 2022 and the second end tooth 4011 is achieved.

[0090] Further, the first blocking part 401 is provided with a third through hole 4012 away from the second end tooth 4011. The third through hole 4012 is used to guide the second airflow 204 to the side of the second blocking part 402 away from the rotating shaft.

[0091] The third through hole 4012 can guide the second airflow 204 to flow in the direction close to the rotating shaft. Based on this, the position of the first airflow 102 and the second airflow 204 flowing in the right direction shown by the arrow A in the related art is not adjusted, that is, the first airflow 102 and the second airflow 204 away from the second compressor 2 still flow along the original flow path in the related art, so that the technical effect of ensuring that the adjustment degree of the engine structure is reduced is achieved. Figure 1

[0092] In this embodiment, the second blocking part 402 can be designed as a split structure in the axial direction to improve the technical effect of facilitating the processing of the second blocking part. The second blocking part 402 in the split structure is fixedly connected. Of course, in other embodiments, according to the design of the engine, the second blocking part 402 can also be designed as a one-piece structure.

[0093] In addition, the engine of the present embodiment can increase the heat exchange coefficient of the first end tooth 2022 and the second end tooth 4011 in the cavity 2021 to 500 W / (m 2 ​Therefore, the temperature of the first end tooth 2022 and the second end tooth 4011 in the embodiment is less than that in the related art, and the temperature difference is at least 50K, that is, the engine in the embodiment can effectively reduce the temperature of the first end tooth 2022 and the second end tooth 4011, thereby achieving the technical effect of improving the service life of the first end tooth 2022 and the second end tooth 4011.

[0094] In addition, the engine comprises a combustion chamber sleeved on the rotating shaft and arranged at the end of the second compressor 2 away from the first compressor 1, that is, the right end of the second compressor 2 as shown in the figure. Figure 1 The fourth gas outlet in communication with the combustion chamber is further arranged on the second compressor 2. The first air flow and the second air flow are formed as follows:

[0095] After the air passes through the air inlet of the first compressor 1, the air is divided into two flow paths. One flow path forms the first air flow through the first gas outlet 101, and the other flow path is the first main flow path which enters the second compressor 2 through the second gas outlet. The first main flow path is further divided into two flow paths. One flow path is the second main flow path which enters the combustion chamber through the fourth gas outlet for combustion, and the other flow path forms the second air flow through the third gas outlet 203.

[0096] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. An engine characterized by, The engine comprises: a rotating shaft; a first compressor (1) rotatably connected to the rotating shaft, one end of the first compressor (1) being provided with an air inlet, and the other end of the first compressor (1) being provided with a first air outlet (101) and a second air outlet, air flowing out of the first air outlet (101) forming a first air flow (102); a second compressor (2) rotatably connected to the rotating shaft and arranged on one side of the first compressor (1), the second compressor (2) comprising a main body (201) and a blade root (202), one end of the main body (201) being in communication with the second air outlet, the other end of the main body (201) being provided with a third air outlet (203) in communication with the second air outlet, air flowing out of the third air outlet (203) forming a second air flow (204), the temperature of the second air flow (204) being higher than that of the first air flow (102); a first side of the blade root (202) is located on the flow path of the first air flow (102), a second side of the blade root (202) is located on the flow path of the second air flow (204), an end of the blade root (202) away from the first compressor (1) is provided with a first end tooth (2022), a first through hole (205) is formed on the first side of the blade root (202) towards the direction of the first end tooth (2022), and the first through hole (205) is used for adjusting the first air flow (102) flowing through the first end tooth (2022); a sealing unit (3) arranged on the inner diameter of the first end tooth (2022) and / or the outer diameter of the first end tooth (2022), used for isolating the first air flow (102) and the second air flow (204) on both sides of the first end tooth (2022).

2. The engine of claim 1, wherein The sealing unit (3) is arranged on the inner diameter of the first end tooth (2022), and the material of the sealing unit (3) is a heat-conducting material.

3. The engine of claim 2, wherein, A plurality of heat-conducting portions (5) are arranged on the side of the sealing unit (3) away from the first end tooth (2022), and the heat-conducting portions (5) are protrudingly arranged away from the first end tooth (2022).

4. The engine of claim 3, wherein The plurality of heat-conducting portions (5) are arranged in multiple rows and multiple columns. The side surface of the heat-conducting portion (5) and / or the end surface of the heat-conducting portion (5) away from the sealing unit (3) is provided with a heat-conducting hole.

5. The engine of any one of claims 1-4, wherein, One side of the blade root (202) is provided with a cavity (2021) arranged close to the first end tooth (2022).

6. The engine of claim 5, wherein The first side of the blade root (202) is provided with a second through hole (2023) towards the direction of the cavity (2021), and the second through hole (2023) is in communication with the cavity (2021).

7. The engine of any one of claims 1-4, wherein, The central axis of the first through hole (205) and a straight line passing through the first through hole (205) and perpendicular to the rotating shaft form an angle.

8. The engine of claim 5, wherein, The engine comprises: The barrier unit (4) comprises a second end tooth (4011) which is in meshing connection with the first end tooth (2022) and along the axial direction of the rotating shaft, the sealing unit (3) covers at least the meshing end of the second end tooth (4011) and the first end tooth (2022).

9. The engine of claim 8, wherein, The barrier unit (4) comprises: A first barrier portion (401) is sleeved on the rotating shaft, one end of the first barrier portion (401) is provided with the second end tooth (4011), and the other end of the first barrier portion (401) extends away from the second end tooth (4011); A second barrier portion (402) is sleeved on the rotating shaft, the second barrier portion (402) is arranged close to the rotating shaft, one end of the second barrier portion (402) is fixedly connected to the first barrier portion (401), a gap between the second barrier portion (402) and the rotating shaft is in communication with the cavity (2021), and the other end of the second barrier portion (402) extends away from the first end tooth (2022); The first airflow (102) flows along the side of the second barrier portion (402) close to the rotating shaft, and the second airflow (204) flows along the side of the first barrier portion (401) away from the rotating shaft.

10. The engine of claim 9, wherein The first barrier portion (401) is provided with a third through hole (4012) at the end away from the second end tooth (4011), and the third through hole (4012) is used for guiding the second airflow (204) to flow to the side of the second barrier portion (402) away from the rotating shaft.

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