A front cavity distortion generator

Abstract

The present invention belongs to the technical field of distortion generators, and particularly relates to a front cavity distortion generator, which comprises a front plate and a rear plate. A bottom plate is arranged at the bottom between the front plate and the rear plate, and a plurality of support rods are fixedly connected at the top between the front plate and the rear plate. It is characterized in that: a top plate device is slidably connected at the top between the front plate and the rear plate, and the top plate device is installed on the upper parts of the plurality of support rods; an outlet is arranged in the middle of the outer side of the rear plate. Through the cooperation between the top plate and the base, the present invention can quickly form different-mode vortex distortion flow fields at the front end of a compressor, and can adjust the direction and intensity of the vortex by controlling the opening degree of the top plate. The invention can be applied to numerical simulation and experimental research work on studying the influence of distortion flow fields on the performance of compressors, and provides a reference for establishing corresponding databases, having strong engineering application value.

Description

Technical Field

[0001] The present invention belongs to the technical field of distortion generators, and particularly relates to a front cavity distortion generator. Background Art

[0002] Compressors are widely used in the automotive industry. Usually, an intake pipe structure is provided at the front end of the compressor to guide the airflow entering the compressor impeller. However, due to the limitation of the installation space, in actual use, centrifugal compressors usually adopt a bent pipe intake method, so a distorted flow field is formed at the inlet. The bent pipe intake method, such as a 90° bent pipe and an S-shaped bent pipe, usually forms a vortex distorted flow field at the compressor inlet. In order to study the influence of the vortex distorted flow field formed at the inlet on the performance of the compressor, scholars have studied it by means of numerical simulation and experimental research. During the research process, first, a distorted flow field needs to be formed at the compressor inlet. At this time, a generator capable of forming a distorted flow field, that is, a distortion generator, needs to be set at the front end of the compressor.

[0003] In existing research, some scholars have adopted the bent pipe intake method to obtain a distorted flow field. However, one bent pipe structure can only generate one distorted flow field. If it is necessary to study the influence of different types and intensities of distorted flow fields on the performance of the compressor, multiple bent pipe structures need to be replaced. This method is relatively cumbersome both in numerical simulation and in experimental testing. The vane type distortion generator can also form a distorted flow field at the compressor inlet, but it needs to design parameters such as vane airfoil and angle according to the actual operating compressor. Moreover, when the air flow passes through the blades with thickness, more flow losses will be generated, and the processing cost and accuracy are also relatively high. The adjustability of the above two distortion generators is relatively poor. Summary of the Invention

[0004] The present invention aims to achieve a front cavity distortion generator, which can solve the problems in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A front cavity distortion generator, comprising a front plate 2 and a rear plate 4. A bottom plate 3 is provided at the bottom between the front plate 2 and the rear plate 4. A plurality of support rods 9 are fixedly connected at the top between the front plate 2 and the rear plate 4. It is characterized in that: a top plate device 5 is slidably connected at the top between the front plate 2 and the rear plate 4, and the top plate device 5 is installed on the upper parts of the plurality of support rods 9; an outlet 7 is provided in the middle on the outer side of the rear plate 4.

[0007] On the outer sides of the front plate 2 and the rear plate 4, arc-shaped sliding grooves 5-6 are respectively provided, and a top plate device 5 is slidably connected in the arc-shaped sliding grooves 5-6; the top plate device 5 includes two bases 5-4, and the lower parts of the two bases 5-4 are integrally connected sliding blocks 5-10 respectively. Fixing screws 6 are threadedly connected to the two sliding blocks 5-10, and the fixing screws 6 are slidably connected with the arc-shaped sliding grooves 5-6; the upper parts of the two bases 5-4 are integrally connected mounting frames 5-7 respectively, and a top plate receiving rod 5-3 is movably connected between the two mounting frames 5-7, and a top plate assembly is sleeved on the top plate receiving rod 5-3; a guide rod 8 is fixedly connected between the two bases 5-4.

[0008] When it is necessary to slide the position of the top plate device 5, first loosen the fixing screws 6 on the two sliding blocks 5-10, then slide the top plate device 5 in the arc-shaped sliding groove 5-6. After sliding to the required position, tighten the fixing screws 6 on the two sliding blocks 5-10 to fix the position of the top plate device 5.

[0009] The top plate assembly includes a cylinder body, a top plate 5-1 is wound around the cylinder body, one end of the top plate 5-1 is fixedly connected to the cylinder body, the other end of the top plate 5-1 is fixedly connected with a top plate fastening rod 5-2, and one end of the top plate fastening rod 5-2 is movably connected with a slide rail fastening screw 1.

[0010] A plurality of small through holes 9-2 are arranged along the arc on the arc-shaped sliding groove 5-6, and a top plate fastening rod 5-2 is movably connected in the small through holes 9-2; threaded holes 9-1 are opened at both ends of the top plate fastening rod 5-2, and slide rail fastening screws 1 are threadedly connected in the threaded holes 9-1.

[0011] After pulling the top plate 5-1 to the required position through the top plate fastening rod 5-2, when the top plate fastening rod 5-2 is aligned with the corresponding small through hole 9-2, thread the slide rail fastening screw 1 into the threaded holes 9-1 at both ends of the top plate fastening rod 5-2 to fix the position of the top plate 5-1.

[0012] The top plate 5-1 is of a tape measure structure and has an automatic retraction function; the top plate 5-1 can be stretched and unfolded. When being wound up, it can be wound outside the cylinder body. Its length can be directly stretched, and its position can be obtained by sliding the base 5-4 along the arc-shaped sliding grooves 5-6 of the front plate 2 and the rear plate 4 and fixed.

[0013] A groove 5-8 is opened on the inner side of the top of one of the mounting frames 5-7, and a through hole 5-9 is opened on the top of the other mounting frame 5-7. The top plate receiving rod 5-3 is movably connected between the groove 5-8 and the through hole 5-9.

[0014] The cylinder body is placed between two mounting brackets 5-7. A cylinder body is sleeved on the top plate receiving rod 5-3. One end of the top plate receiving rod 5-3 is inserted into the groove 5-8, and the other end of the top plate receiving rod 5-3 passes through the through hole 5-9 and is threadedly connected with a threaded fixing bolt 5-5.

[0015] The bottom plate 3 has a semi-circular structure.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1) Through the cooperation between the top plate and the base, different modes of vortex distortion flow fields can be quickly formed at the front end of the compressor, and the direction and intensity of the vortex can be adjusted by controlling the opening degree of the top plate. The invention can be applied to numerical simulation and experimental research on the influence of the distortion flow field on the performance of the compressor, providing a reference for establishing the corresponding database, and having strong engineering application value.

[0018] 2) Through the setting of the fixing screws, it is convenient to install the top plate device on the front plate and the rear plate, and the installation is flexible. Different directions and different intensities of vortex modes can be adjusted. Different vortex distortion flow fields can be quickly generated both in numerical simulation and experimental testing, providing effective technical support for the research on the influence of the distortion flow field on the performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the structure of the top plate device of the present invention;

[0022] Figure 3-1 is a schematic diagram of the opening degree adjustment structure of the present invention;

[0023] Figure 3-2 is a schematic diagram of the symmetric vortex structure that can be generated at the outlet of the distortion generator of the present invention;

[0024] Figure 4-1 is a schematic diagram of the opening degree adjustment structure of the present invention;

[0025] Figure 4-2 is a schematic diagram of the symmetric vortex structure that can be generated at the outlet of the distortion generator of the present invention;

[0026] Figure 5-1 is a schematic diagram of the opening degree adjustment structure of the present invention;

[0027] Figure 5-2 Schematic diagram II showing the generation of a symmetric vortex structure at the outlet of the distortion generator of the present invention;

[0028] Figure 6-1 Schematic diagram I showing the opening degree adjustment structure of the present invention;

[0029] Figure 6-2 Schematic diagram II showing the generation of a symmetric vortex structure at the outlet of the distortion generator of the present invention;

[0030] Figure 7 Schematic diagram of the partial structure of A of the present invention;

[0031] Figure 8 Schematic diagram of the partial structure of B of the present invention;

[0032] Figure 9 Schematic diagram of the partial structure of C of the present invention.

[0033] In the figure: slide rail fastening screw 1, front plate 2, bottom plate 3, rear plate 4, top plate device 5, fixing screw 6, outlet 7, guide rod 8, support rod 9, top plate 5-1, top plate fastening rod 5-2, top plate storage rod 5-3, base 5-4, threaded fixing bolt 5-5, arc-shaped chute 5-6, mounting bracket 5-7, groove 5-8, through hole 5-9, sliding block 5-10, threaded hole 9-1, small through hole 9-2. Detailed implementation manner

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0035] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Please refer to Figure 1-8 , the present invention provides the following technical solutions:

[0039] A front cavity distortion generator, as Figure 1 and Figure 2 , Figures 7-9 shown, includes a front plate 2 and a rear plate 4. A bottom plate 3 is provided at the bottom between the front plate 2 and the rear plate 4. A plurality of support rods 9 are fixedly connected at the top between the front plate 2 and the rear plate 4. A top plate device 5 is slidably connected at the top between the front plate 2 and the rear plate 4. The top plate device 5 is installed on the upper parts of the plurality of support rods 9. An outlet 7 is provided in the middle on the outer side of the rear plate 4.

[0040] Arc-shaped chutes 5-6 are respectively provided on the outer sides of the front plate 2 and the rear plate 4. The top plate device 5 is slidably connected in the arc-shaped chutes 5-6. The top plate device 5 includes two bases 5-4. The lower parts of the two bases 5-4 are integrally connected sliding blocks 5-10 respectively. Fixing screws 6 are threadedly connected to the two sliding blocks 5-10. The fixing screws 6 are slidably connected with the arc-shaped chutes 5-6. The upper parts of the two bases 5-4 are integrally connected mounting frames 5-7 respectively. A top plate receiving rod 5-3 is movably connected between the two mounting frames 5-7. A top plate assembly is sleeved on the top plate receiving rod 5-3. A guide rod 8 is fixedly connected between the two bases 5-4.

[0041] When it is necessary to slide the position of the top plate device 5, first loosen the fixing screws 6 on the two sliding blocks 5-10, then slide the top plate device 5 in the arc-shaped chutes 5-6. After sliding to the required position, tighten the fixing screws 6 on the two sliding blocks 5-10 to fix the position of the top plate device 5.

[0042] The top plate assembly includes a cylinder body, around which a top plate 5-1 is wound. One end of the top plate 5-1 is fixedly connected to the cylinder body, and the other end of the top plate 5-1 is fixedly connected with a top plate fastening rod 5-2. One end of the top plate fastening rod 5-2 is movably connected with a slide rail fastening screw 1.

[0043] A number of small through holes 9-2 are arranged along the arc on the arc-shaped sliding groove 5-6, and the top plate fastening rod 5-2 is movably connected in the small through holes 9-2; Threaded holes 9-1 are opened at both ends of the top plate fastening rod 5-2, and the slide rail fastening screw 1 is threadedly connected in the threaded holes 9-1.

[0044] After the top plate 5-1 is pulled to the required position through the top plate fastening rod 5-2, when the top plate fastening rod 5-2 is aligned with the corresponding small through hole 9-2, the slide rail fastening screw 1 is threadedly connected into the threaded holes 9-1 at both ends of the top plate fastening rod 5-2 to fix the position of the top plate 5-1.

[0045] The top plate 5-1 is of a tape measure structure and has an automatic retraction function; The top plate 5-1 can be stretched and unfolded. When being wound up, it can be wound outside the cylinder body. Its length can be directly stretched, and its position can be obtained by sliding the base 5-4 along the arc-shaped sliding groove 5-6 of the front plate 2 and the rear plate 4 and fixed.

[0046] A groove 5-8 is opened on the inner side of the top of one of the mounting brackets 5-7, and a through hole 5-9 is opened on the top of the other mounting bracket 5-7. A top plate storage rod 5-3 is movably connected between the groove 5-8 and the through hole 5-9.

[0047] The cylinder body is placed between two mounting brackets 5-7. The cylinder body is sleeved on the top plate storage rod 5-3. One end of the top plate storage rod 5-3 is inserted into the groove 5-8, and the other end of the top plate storage rod 5-3 passes through the through hole 5-9 and is then threadedly connected with a threaded fixing bolt 5-5.

[0048] The bottom plate 3 is of a semi-circular structure.

[0049] Working principle: As Figure 1 shown, the top plate device 5 can slide along the sliding grooves 5-6 on the front plate 2 and the rear plate 4, and move through the fixing screws 6 on both sides of the sliding grooves 5-6, so that the base 5-4 slides and adjusts, driving the top plate assembly. After the fixing screw 6 slides to the specified position inside the sliding groove 5-6, the base 5-4 is fixed on the side of the sliding groove 5-6 of the front plate 2 and the rear plate 4 by twisting the fixing screw 6.

[0050] As Figure 2As shown, the top plate 5-1 can be stored outside the top plate storage member 5-3 in a structure similar to a tape measure. The change in its stretchable length affects the change in the generated vortex intensity. Adjusting the fixed position of the top plate device 5 can adjust the change in the generated vortex type. The top plate fastening rod 5-2 can be fixed at a certain position in the chute 5-6 by the slide rail fastening screw 1, so that the top plate 5-1 is guided along the guide rod and extends under the support of several support rods 9 between the front plate 2 and the rear plate 4. The base 5-4 can be fixed in the chutes 5-6 of the front plate 2 and the rear plate 4 by the threaded fixing screw 6 to realize the sliding function of the entire top plate device 5;

[0051] By adjusting the opening degree of the top plate 5-1, the function of generating different vortex patterns can be realized. When installed during the operation of the compressor, the air flow enters from the opening of the top plate 5-1 and flows out from the outlet 7. When the air flow enters the cavity of the distortion generator, since the bottom plate 3 has a semi-circular structure, when the air flow reaches the bottom of the bottom plate 3 from the inlet of the top plate 5-1, two swirling flows will be formed due to the impact. As the air flow at the inlet of the top plate 5-1 continuously enters, the air flow with a swirling structure flows out from the outlet 7, thus generating a vortex distortion flow field. According to the different opening degrees of the top plate 5-1, the vortex patterns generated by the distortion generator are also different. Next, the sliding adjustment of the top plate 5-1 will be described. The adjustment of the top plate 5-1 is mainly realized through the chute 5-6 and the top plate storage member 5-3. The top plate 5-1 has a certain extended length, which can be stored in the top plate storage member 5-3, and its length can be directly stretched. Its position can be obtained by sliding the base 5-4 along the chutes 5-6 of the front plate 2 and the rear plate 4 and fixed;

[0052] When the opening degree of the top plate 5-1 is adjusted to as Figure 3-1 shown, a symmetric vortex structure can be generated at the outlet of the distortion generator. As Figure 3-2 shown, by stretching the length of the top plate 5-1 and sliding the position of the base 5-4, when the opening degree of the top plate 5-1 is adjusted to a symmetric distribution, as Figure 4-1 shown, the purpose of generating symmetric vortex structures with different intensities can be achieved. As Figure 4-2 shown;

[0053] By performing an asymmetric adjustment on the top plate 5-1, as Figure 5-1 shown, the purpose of generating a biased vortex can be achieved. When the opening degree of the top plate 5-1 is as Figure 5-1 shown, the biased vortex structure generated by the distortion generator is as Figure 5-2As shown, since at this opening degree, the two inlets of the air flow at the top plate 5-1 have different sizes. After the air flow enters the flow channel from the inlet with a larger opening, the swirling flow formed by more air flow impacting the bottom plate 3 is larger. On the contrary, less air flow enters from the inlet with a smaller opening, and the swirling flow formed after impacting the bottom plate 3 is smaller. Therefore, a large and a small swirling flow in the cavity can form a biased vortex structure at the outlet of the distortion generator;

[0054] When the top plate 5-1 is adjusted to the structure as shown in Figure 6-1 a biased vortex structure as shown in Figure 6-2 can be generated. This method realizes the effect of generating different-direction biased vortex structures by adjusting the opening degree of the top plate 5-1. At the same time, by stretching the top plate 5-1 to control the size of the opening degree, the effect of adjusting the generated biased vortex intensity can also be achieved;

[0055] In addition, by rotatably installing the entire distortion generator at the compressor inlet, a distorted flow field with multiple angles can be formed at the front end of the compressor. Furthermore, by adjusting the diameter and width of the cavity generator, the purpose of forming a distorted flow field with different swirl intensities at the compressor inlet can be achieved.

[0056] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described method can be performed in a different order than described, and various steps can be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0057] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A front cavity distortion generator, comprising a front plate (2) and a rear plate (4), a bottom plate (3) is arranged at the bottom between the front plate (2) and the rear plate (4), and a plurality of support rods (9) are fixedly connected at the top between the front plate (2) and the rear plate (4), characterized in that: A top plate device (5) is slidably connected between the front plate (2) and the rear plate (4), and the top plate device (5) is installed on the upper parts of a plurality of support rods (9); an outlet (7) is arranged in the middle of the outer side of the rear plate (4). Arc-shaped chutes (5-6) are respectively arranged on the outer sides of the front plate (2) and the rear plate (4), and a top plate device (5) is slidably connected in the arc-shaped chutes (5-6); the top plate device (5) includes two bases (5-4), the lower parts of the two bases (5-4) are respectively integrally connected with sliding blocks (5-10), fixing screws (6) are threadedly connected to the two sliding blocks (5-10), and the fixing screws (6) are slidably connected with the arc-shaped chutes (5-6); the upper parts of the two bases (5-4) are respectively integrally connected with mounting frames (5-7), a top plate receiving rod (5-3) is movably connected between the two mounting frames (5-7), and a top plate assembly is sleeved on the top plate receiving rod (5-3); a guide rod (8) is fixedly connected between the two bases (5-4). The top plate assembly includes a cylinder body, a top plate (5-1) is wound around the cylinder body, one end of the top plate (5-1) is fixedly connected to the cylinder body, the other end of the top plate (5-1) is fixedly connected with a top plate fastening rod (5-2), and one end of the top plate fastening rod (5-2) is movably connected with a slide rail fastening screw (1). A plurality of small through holes (9-2) are arranged along the arc on the arc-shaped chute (5-6), and a top plate fastening rod (5-2) is movably connected in the small through holes (9-2); threaded holes (9-1) are opened at both ends of the top plate fastening rod (5-2), and slide rail fastening screws (1) are threadedly connected in the threaded holes (9-1). The top plate (5-1) is of a tape measure structure and has an automatic retracting function; the top plate (5-1) can be stretched and unfolded, when being wound up, it can be wound on the outer side of the cylinder body, its length can be directly stretched to obtain, its position can be obtained by sliding the base (5-4) along the arc-shaped chutes (5-6) of the front plate (2) and the rear plate (4), and fixed.

2. The front cavity distortion generator according to claim 1, characterized in that: A groove (5-8) is opened on the inner side of the top of one of the mounting frames (5-7), a through hole (5-9) is opened on the top of the other mounting frame (5-7), and a top plate receiving rod (5-3) is movably connected between the groove (5-8) and the through hole (5-9).

3. The front cavity distortion generator according to claim 1, characterized in that: The cylinder body is placed between the two mounting frames (5-7), the cylinder body is sleeved on the top plate receiving rod (5-3), one end of the top plate receiving rod (5-3) is inserted into the groove (5-8), and the other end of the top plate receiving rod (5-3) passes through the through hole (5-9) and is then threadedly connected with a threaded fixing bolt (5-5).

4. The front cavity distortion generator according to claim 1, characterized in that: The bottom plate (3) is of a semi-circular structure.

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