An integrated structure of a micro dynamic sensor and a housing processing

Abstract

The present invention provides an integrated structure of a micro dynamic sensor and a casing treatment, including: a slotted casing treatment structure; a plum blossom pile groove formed between the front slot casing and the rear slot casing of the slotted casing; a sensor mounting structure that can be detachably installed in the plum blossom pile groove; the sensor mounting structure includes a plum blossom pile fixing cover that can be adapted to the plum blossom pile groove, and a plum blossom pile sensor fixing cover connected to the plum blossom pile fixing cover, and a casing connection hole is provided on the plum blossom pile fixing cover for detachably fixing the plum blossom pile fixing cover in the plum blossom pile groove. The present invention not only provides a casing treatment structure that can expand stability and increase efficiency, but also can provide precise measurement support for the tip flow field to deeply analyze the action mechanism of the casing treatment under various incoming flow conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines / aeroengines, and particularly relates to an integrated structure of a micro dynamic sensor and a casing treatment. Background Art

[0002] The stability of an aero compressor is very important for the entire engine. Once it enters the stall state, the performance of the compressor will be greatly affected. Therefore, having a wide stall margin is one of the requirements for an aero compressor. To broaden the stall margin, the engineering often adopts the simple and effective method of casing treatment. However, there are many forms of casing treatment, and the explanations of the stabilizing mechanisms of each form are not yet unified. Therefore, more detailed experimental measurements are still needed for the stabilizing mechanism of casing treatment.

[0003] Due to the structural characteristics of the slotted casing treatment, the existing experimental measurement schemes still mainly measure the overall characteristic parameters of the compressor, supplemented by the wall dynamic measurement holes upstream of the rotor leading edge or downstream of the rotor trailing edge. Although this experimental method can obtain the influence of the casing treatment on the overall characteristic parameters of the compressor, it lacks the measurement of the flow field parameters between the slots, which makes it impossible for researchers to visualize the flow field between the slots and is not conducive to in-depth exploration of the action mechanism of the casing treatment method.

[0004] Therefore, how to design a safe and reliable experimental device to obtain the flow field data between the slots is of great significance. Summary of the Invention

[0005] Therefore, in order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an integrated structure of a micro dynamic sensor and a casing treatment, including:

[0006] A slotted casing treatment structure;

[0007] A plum blossom pile slot formed between the front slot casing and the rear slot casing of the slotted casing;

[0008] A sensor mounting structure that can be detachably installed in the plum blossom pile slot;

[0009] The sensor mounting structure includes a plum blossom pile fixing cover that can be adapted to the plum blossom pile slot, and a plum blossom pile sensor fixing cover connected to the plum blossom pile fixing cover.

[0010] The plum blossom pile fixing cover is provided with a casing connection hole for detachably fixing the plum blossom pile fixing cover in the plum blossom pile slot.

[0011] Furthermore, the slotted casing treatment structure is composed of two parts: a front slot structure and a rear slot structure.

[0012] Further, a plurality of plum blossom pile grooves are provided and are circumferentially distributed along the joint of the front slot casing and the rear slot casing of the slot casing.

[0013] Further, the plum blossom pile groove is composed of a first part and a second part. The first part is at least partially formed on the trailing edge of the front slot casing close to the trailing lip slot boss of the front slot casing, and the second part is at least partially formed on the leading edge of the front lip slot groove of the rear slot casing. The first part and the second part together constitute the plum blossom pile groove.

[0014] Further, the sensor mounting structure includes a plum blossom pile sensor fixing cover. The plum blossom pile sensor fixing cover includes a first mounting structure and a second mounting structure. The first mounting structure includes a hemispherical boss, and the second mounting structure includes a cylindrical blind hole. The hemispherical boss and the cylindrical blind hole can be connected and matched with each other so that the first mounting structure and the second mounting structure form the plum blossom pile sensor fixing cover.

[0015] Further, the first mounting structure includes a first plum blossom pile groove mounting portion and a first sensor fixing portion. The first plum blossom pile groove mounting portion is fixedly connected to the first sensor fixing portion, and the longitudinal axis of the first plum blossom pile groove mounting portion is perpendicular to the longitudinal axis of the first sensor fixing portion.

[0016] Further, the second mounting structure includes a second plum blossom pile groove mounting portion and a second sensor fixing portion. The second plum blossom pile groove mounting portion is fixedly connected to the second sensor fixing portion, and the longitudinal axis of the second plum blossom pile groove mounting portion is perpendicular to the longitudinal axis of the second sensor fixing portion.

[0017] Further, the first part includes a first sensor inner supporting counterbore. The first sensor inner supporting counterbore is located at the bottom of the groove of the first part and is used for supporting and fixing the sensor; and / or

[0018] The second part includes a second sensor inner supporting counterbore. The second sensor inner supporting counterbore is located at the bottom of the groove of the second part and is used for supporting and fixing the sensor.

[0019] Further, the first sensor fixing portion includes a first semi-elliptical thin boss, and a first sensor outer fixing through hole is provided on the first semi-elliptical thin boss; and / or the second sensor fixing portion includes a second semi-elliptical thin boss, and a second sensor outer fixing through hole is provided on the second semi-elliptical thin boss.

[0020] Further, the first sensor outer fixing through hole and the first sensor inner supporting counterbore are at least in one-to-one correspondence, and the second sensor outer fixing through hole and the second sensor inner supporting counterbore are at least in one-to-one correspondence.

[0021] The present invention also relates to an aero - compressor casing with a slot - type treatment structure, including the above - mentioned integrated structure.

[0022] The present invention also relates to an aero - compressor, including the above - mentioned casing.

[0023] Compared with the prior art, the present invention can ensure a precision interface with a small - size sensor mounted, and probe reserved holes upstream of the treatment slot, between the rotating and stationary blades, and at the outlet of the stationary blades, so as to obtain experimental data at corresponding positions to deeply reveal the mechanism of casing treatment for stability improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall assembly schematic diagram of the fixing structure of the sensor of the gas - turbine slot - type casing of the present invention.

[0025] Figure 2 It is a schematic diagram of the front - slot casing structure.

[0026] Figure 3 It is a partial enlarged view of the plum - blossom pile slot of the front - slot casing.

[0027] Figure 4 It is a schematic diagram of the rear - slot casing structure.

[0028] Figure 5 It is a first installation structure schematic diagram of the plum - blossom pile sensor fixing cover.

[0029] Figure 6 It is a second installation structure schematic diagram of the plum - blossom pile sensor fixing cover.

[0030] Figure 7 It is a schematic diagram of the sensor plug structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further elaborates on the present invention in detail with reference to specific embodiments and the attached Figures 1-7 , drawings.

[0032] An embodiment of the present invention provides an integrated structure of a micro - dynamic sensor and casing treatment, including:

[0033] A plum - blossom pile slot 3 formed between the front - slot casing 1 and the rear - slot casing 2 of the slot - type casing;

[0034] A sensor installation structure that can be detachably installed in the plum - blossom pile slot 3;

[0035] The sensor installation structure includes a plum - blossom pile fixing cover that can be adapted to the plum - blossom pile slot 3, and a plum - blossom pile sensor fixing cover connected to the plum - blossom pile fixing cover,

[0036] The plum blossom pile fixing cover is provided with a casing connection hole 18 with a diameter of 8 mm for detachably fixing the plum blossom pile fixing cover in the plum blossom pile groove 3.

[0037] The present invention provides a micro dynamic sensor and casing processing integrated structure, in which a bearing hole structure capable of carrying small-sized sensors is axially arranged in the middle of the slot structure. The bearing hole structure is arranged in four rows along the circumferential direction of the compressor, and each row has 8 bearing holes along the axial direction, which can completely cover the axial length range occupied by the slot structure. Through this device, the dynamic wall static pressure flow field at the rotor tip can be obtained, and the action mechanism of the slot structure on the tip leakage flow of the compressor rotor can be observed, so as to deeply reveal the stability enhancement mechanism of the slotted casing.

[0038] In one embodiment, the plum blossom pile grooves 3 are multiple and are circumferentially distributed at the joint of the front slot casing 1 and the rear slot casing 2 of the slotted casing.

[0039] In one embodiment, the plum blossom pile groove 3 is composed of a first part 31 and a second part 32. The first part 31 is at least partially formed at the rear edge of the front slot casing 1 close to the rear lip slot boss 9 of the front slot casing, and the second part 32 is at least partially formed at the front edge of the front lip slot groove 11 of the rear slot casing 2 of the rear slot casing. The first part 31 and the second part 32 together constitute the plum blossom pile groove 3.

[0040] In one embodiment, the sensor mounting structure includes a plum blossom pile sensor fixing cover. The plum blossom pile sensor fixing cover includes a first mounting structure and a second mounting structure. The first mounting structure includes a hemispherical boss 16 with a diameter of 1 mm and a height of 1.5 mm; the second mounting structure includes a cylindrical blind hole 17 with a diameter of 1 mm and a depth of 2 mm; the hemispherical boss 16 and the cylindrical blind hole 17 can be connected and matched with each other so that the first mounting structure and the second mounting structure form a plum blossom pile sensor fixing cover.

[0041] In one embodiment, the first mounting structure includes a first plum blossom pile groove mounting part and a first sensor fixing part 12. The first plum blossom pile groove mounting part is fixedly connected to the first sensor fixing part 12, and the longitudinal axis of the first plum blossom pile groove mounting part is perpendicular to the longitudinal axis of the first sensor fixing part 12.

[0042] In one embodiment, the second mounting structure includes a second plum blossom pile groove mounting part and a second sensor fixing part 13. The second plum blossom pile groove mounting part is fixedly connected to the second sensor fixing part 13, and the longitudinal axis of the second plum blossom pile groove mounting part is perpendicular to the longitudinal axis of the second sensor fixing part 13.

[0043] In one embodiment, the first part 31 includes a first sensor inner supporting counterbore 101, which is located at the bottom of the groove of the first part 31 and is used to support and fix the sensor; and / or

[0044] The second part 32 includes a second sensor inner supporting counterbore, which is located at the bottom of the groove of the second part 32 and is used to support and fix the sensor.

[0045] In one embodiment, the first sensor fixing part 12 includes a first semi-elliptical thin boss 141, and a first sensor outer fixing through hole 151 is provided on the first semi-elliptical thin boss 141; and / or the second sensor fixing part includes a second semi-elliptical thin boss 161, and a second sensor outer fixing through hole 152 is provided on the second semi-elliptical thin boss 161. The diameters of the first sensor outer fixing through hole 151 and the second sensor outer fixing through hole 152 are the same, both being 1.7 mm.

[0046] In one embodiment, the first sensor outer fixing through hole 151 and the first sensor inner supporting counterbore 101 are at least in one-to-one correspondence, and the second sensor outer fixing through hole 152 and the second sensor inner supporting counterbore are at least in one-to-one correspondence.

[0047] In one embodiment, the maximum outer diameter of the front slot casing 1 is 540 mm, the inner diameter is 500 mm, and the front slot casing 1 is provided with 120 optimized irregular profile treatment slot structures 5; the total length of the oblong straight slot 4 for mounting the probe is 20 mm, the semi-circular radius is 5 mm, and M6 threaded holes are opened on both sides of each oblong straight slot 4, and the central distance from the axis of the oblong straight slot 4 is 17.5 mm. This structure corresponds to the assembly structure of the probe. Five probe holes are located at the same axial position, and the total pressure profile at this axial position can be measured; the front slot casing 1 is provided with 8 half plum blossom pile slots 3 evenly distributed in the circumferential direction, the fillet radius is 5 mm, and the slot depth is 10 mm. Cooperating with the rear slot casing 2 and the plum blossom pile fixing cover can complete the outward thrust fixing of the sensor; four sensor inner support counterbores with a diameter of 1.7 mm and a distance of 0.2 mm from the inner wall surface of the casing are axially arranged in the counterbore. A through hole with a diameter of 0.8 mm is provided at the center of the bottom of the sensor inner support counterbore. The diameter 1.7 mm counterbore structure and the diameter 0.8 mm through hole can form a small boss, which can be used to support the boss 20 of the sensor 19 and complete the inward thrust fixing of the sensor 19; the front end face and the rear end face of the front slot casing 1 are respectively provided with a front slot casing front lip groove boss 8 with an outer diameter of 520 mm and a height of 12 mm and a front slot casing rear lip groove boss 9 with an outer diameter of 510 mm and a height of 3 mm to facilitate connection with the front and rear sections of the compressor casing. In a specific implementation manner of the embodiment of the present disclosure, the rear slot casing has 2 circumferentially square treatment slot structures 6, and its structure is obtained through an optimization algorithm, the slot depth is 2.22 mm, and the slot width is 2.32 mm; the rear slot casing 2 is provided with 5 oblong straight slots 4 at the same angle as the rotor outlet flow angle, and the structural dimensions are the same as those of the front slot casing, which can be used to carry a probe to measure the radial aerodynamic parameters between the rotor and the stator; the rear slot casing 2 is provided with 8 half plum blossom pile slots 3 evenly distributed in the circumferential direction, the fillet radius is 5 mm, and the slot depth is 10 mm. Cooperating with the front slot casing 1 and the plum blossom pile fixing cover can complete the outward thrust fixing of the sensor; four sensor inner support counterbores with a diameter of 1.7 mm and a distance of 0.2 mm from the inner wall surface of the casing are axially arranged in the counterbore. A through hole with a diameter of 0.8 mm is provided at the center of the bottom of the sensor inner support counterbore. The diameter 1.7 mm counterbore structure and the diameter 0.8 mm through hole can form a small boss, which can be used to support the boss 20 of the sensor 19 and complete the inward thrust fixing of the sensor 19; the rear slot casing has 60 stator blade counterbore mounting holes 7, the large round counterbore diameter is 19 mm and the depth is 12 mm, and the small round through hole diameter is 8 mm, which are used to install the stator blades; the front end face and the rear end face are respectively provided with a lip groove recess with an outer diameter of 510 mm and a depth of 3 mm and a lip groove recess with an outer diameter of 520 mm and a height of 10 mm to facilitate connection with the front and rear sections of the compressor casing.

[0048] After each part is processed, first place the 8 sensors into the corresponding outer fixing holes of the plum blossom pile sensor fixing cover respectively, and then combine and dock the female head with it; on the other side, align the front sewing casing and the rear slot casing with the plum blossom pile slot position for docking and installation; then insert the assembled plum blossom pile fixing cover with 8 small sensors into the corresponding plum blossom pile slots of the front sewing casing and the rear slot casing, and tightly fit and install it so that the sensors are in contact with the inner supporting counterbore, and the lower surface of the plum blossom pile fixing cover is completely in contact with the outer surface of the casing, and use bolts to fix it on the outer surface of the casing. Install the remaining 7 plum blossom pile fixing covers according to the above method, and thus complete the installation of the overall structure.

[0049] When in use, first loosen the low-speed compressor pull rod, remove the casing end in the rotor area, and after installing the present invention, tighten the pull rod, connect the sensor to the acquisition system, and then conduct the experiment. When the sensor measurement is not required, the sensor can be replaced with a sensor plug of the same size.

[0050] In one embodiment, the present invention further relates to an aero compressor casing with a slot and seam treatment structure, including the above-mentioned fixing mechanism.

[0051] The present invention provides a micro dynamic sensor and casing treatment integrated structure, and its optimized front sewing and rear slot casing treatment structure can bring about an improvement in the stability of the axial flow compressor. In order to explore its action mechanism, probe holes are arranged both upstream of the rotor and between the rotor and the stator to measure the total pressure parameters of the two profiles; small sensor mounting holes are opened at a very narrow position between the treatment seam and the bottom of the treatment slot on the front sewing casing and the rear slot casing, and are fixed by a plum blossom pile fixing cover. Through this structure, the acquisition of the dynamic static pressure signal on the tip wall surface under the condition of a complex casing treatment structure can be realized. Since 8 rows of precision measurement holes are arranged circumferentially, it can be applied to the measurement under both uniform incoming flow conditions and non-uniform incoming flow conditions. In summary, the present invention can provide precise measurement support for the tip flow field for in-depth analysis of the action mechanism of casing treatment under various incoming flow conditions.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A micro dynamic sensor and casing processing integrated structure, characterized in that, Comprising: A slotted casing treatment structure; A plum blossom pile slot formed between the front slot casing and the rear slot casing of the slotted casing treatment structure; A sensor mounting structure that can be detachably mounted in the plum blossom pile slot; The sensor mounting structure includes a plum blossom pile fixing cover that can be adapted to the plum blossom pile slot, and a plum blossom pile sensor fixing cover connected to the plum blossom pile fixing cover. The plum blossom pile fixing cover is provided with a casing connection hole for detachably fixing the plum blossom pile fixing cover in the plum blossom pile slot.

2. The integrated structure according to claim 1, characterized in that, The slotted casing treatment structure consists of two parts, a front slot structure and a rear slot structure.

3. The integrated structure according to claim 1, characterized in that, There are multiple plum blossom pile slots, which are circumferentially distributed along the joint of the front slot casing and the rear slot casing of the slotted casing treatment structure.

4. The integrated structure according to claim 3, characterized in that, The plum blossom pile slot consists of a first part and a second part. The first part is at least partially formed at the rear edge of the front slot casing near the convex platform of the rear lip slot of the front slot casing. The second part is at least partially formed at the front edge of the front lip slot groove of the rear slot casing of the rear slot casing. The first part and the second part together form the plum blossom pile slot.

5. The integrated structure according to claim 4, characterized in that, The sensor mounting structure includes a plum blossom pile sensor fixing cover. The plum blossom pile sensor fixing cover includes a first mounting structure and a second mounting structure. The first mounting structure includes a hemispherical boss, and the second mounting structure includes a cylindrical blind hole. The hemispherical boss and the cylindrical blind hole can be connected and matched with each other so that the first mounting structure and the second mounting structure form the plum blossom pile sensor fixing cover.

6. The integrated structure according to claim 5, characterized in that, The first mounting structure includes a first plum blossom pile slot mounting portion and a first sensor fixing portion. The first plum blossom pile slot mounting portion is fixedly connected to the first sensor fixing portion, and the longitudinal axis of the first plum blossom pile slot mounting portion is perpendicular to the longitudinal axis of the first sensor fixing portion.

7. The integrated structure according to claim 6, characterized in that, The second mounting structure includes a second plum blossom pile slot mounting portion and a second sensor fixing portion. The second plum blossom pile slot mounting portion is fixedly connected to the second sensor fixing portion, and the longitudinal axis of the second plum blossom pile slot mounting portion is perpendicular to the longitudinal axis of the second sensor fixing portion.

8. The integrated structure according to claim 7, characterized in that, The first part includes a first sensor inner supporting counterbore, and the first sensor inner supporting counterbore is located at the bottom of the slot of the first part for supporting and fixing the sensor; and / or The second part includes a second sensor inner supporting counterbore, and the second sensor inner supporting counterbore is located at the bottom of the slot of the second part for supporting and fixing the sensor.

9. The integrated structure according to claim 8, characterized in that, The first sensor fixing portion includes a first semi-elliptical thin boss, and a first sensor outer fixing through hole is provided on the first semi-elliptical thin boss; and / or the second sensor fixing portion includes a second semi-elliptical thin boss, and a second sensor outer fixing through hole is provided on the second semi-elliptical thin boss.

10. The integrated structure according to claim 9, characterized in that, The first sensor outer fixing through hole and the first sensor inner supporting counterbore are at least in one-to-one correspondence, and the second sensor outer fixing through hole and the second sensor inner supporting counterbore are at least in one-to-one correspondence.

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