Adjustable guide vane cross hole machining method, adjustable guide vane and gas compressor

Abstract

The invention belongs to the technical field of air compressors, and discloses a machining method of an adjustable guide vane cross hole, an adjustable guide vane and an air compressor. The adjustable guide vane comprises a vane handle, and the vane handle comprises a first end and a second end which are oppositely arranged; the machining method of the adjustable guide vane cross hole comprises the steps that S1, a first hole section with the hole diameter of D1 is machined in the end face of a first end, the first hole section is a blind hole, the axis of the blind hole and the axis of a vane handle form an included angle, and the hole bottom of the blind hole is perpendicular to the axis of the vane handle; and S2, a second hole section with the hole diameter being D2 is machined in the end face of the second end in the direction parallel to the axis of the blade handle till the hole bottom of the blind hole is punched through to enable the second hole section to be communicated with the first hole section, and the axis of the second hole section passes through the center of the hole bottom of the blind hole. The first hole section is firstly machined, and then the second hole section is machined until the second hole section is communicated with the first hole section, so that the control precision of the depth of the second hole section is improved, and the probability that steps are formed at the joint of the second hole section and the first hole section is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a method for processing cross holes of adjustable guide vanes, adjustable guide vanes and compressors. Background Art

[0002] The compressor is a component of a gas turbine engine that uses high-speed rotating blades to work on the air to increase the air pressure. The front end of the compressor impeller blade is curved and is called the guide wheel. Its function is to guide the gas into the working impeller without impact, reducing the impact loss of the airflow.

[0003] The blades of the compressor are divided into moving blades and guide vanes. The guide vanes are divided into conventional guide vanes and adjustable guide vanes. Adjustable guide vanes are usually located at the inlet or between stages of the compressor. By changing the installation angle of the blades, the direction, speed and pressure distribution of the airflow entering the compressor are controlled, so that the airflow enters the subsequent blade channel at a suitable angle, improves the efficiency and stability of the compressor, and prevents unstable conditions such as surge.

[0004] In order to facilitate regular borescope inspection of the inner wall of the adjustable guide vane, Figure 1 As shown in FIG. 1 , a cross hole with a large depth-to-diameter ratio needs to be machined on the petiole 11 of the adjustable guide vane. The cross hole is formed by a deep hole 12 and a shallow hole 13 that are cross-connected. The axis of the deep hole 12 is parallel to the axis of the petiole 11, and the axis of the shallow hole 13 is at an angle to the axis of the petiole 11. At present, the conventional machining method for such cross holes is CNC drilling. The difficulty lies in controlling the depth of the deep hole 12. If the deep hole 12 is too deep, a step 14 (such as a step 14) will be formed at the position where the deep hole 12 and the shallow hole 13 are connected. Figure 1 As shown in FIG. 1 , when the borescope detector enters the shallow hole 13 from the deep hole 12, it is easy to collide with the step 14 or even stay at the step 14 and cannot enter the shallow hole 13. If the deep hole 12 is too shallow, the deep hole 12 cannot be connected with the shallow hole 13 (as shown in FIG. 1 ). Figure 2 As shown in the figure, the borescope detector cannot enter the shallow hole 13 from the deep hole 12. It can be seen that when the deep hole 12 of the cross hole is too deep or too shallow, the borescope detector cannot smoothly enter the shallow hole 13 from the deep hole 12, and the borescope detection cannot be carried out smoothly.

[0005] Therefore, it is urgent to propose a processing method for an adjustable guide vane cross hole, an adjustable guide vane and a compressor to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a method for processing an adjustable guide vane cross hole to solve the problem that when the second hole section of the cross hole is too long or too short, the borescope detector cannot smoothly enter the cross hole, thereby causing the borescope detection to fail to proceed smoothly.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A method for processing a cross hole of an adjustable guide vane, wherein the adjustable guide vane includes a petiole, the petiole includes a first end and a second end arranged opposite to each other, and the method for processing the cross hole of the adjustable guide vane includes:

[0009] S1, machining a first hole segment with a hole diameter of D1 on the end surface of the first end, the first hole segment being a blind hole, so that the axis of the blind hole forms an angle with the axis of the petiole, and the bottom of the blind hole is perpendicular to the axis of the petiole;

[0010] S2. A second hole segment with a hole diameter of D2 is machined on the end face of the second end along a direction parallel to the axis of the petiole until the bottom of the blind hole is opened up to connect the second hole segment with the first hole segment, and the axis of the second hole segment passes through the center of the bottom of the blind hole.

[0011] Preferably, the method for processing the cross hole of the adjustable guide vane further comprises:

[0012] S3, widening the aperture of the second hole segment to D21; widening the aperture of the first hole segment to D11.

[0013] Preferably, between step S2 and step S3, the method further includes: flushing out dirt in the first hole segment and the second hole segment.

[0014] Preferably, D21 is equal to D11.

[0015] Preferably, step S1 further comprises: when machining the first hole segment, making the axis of the petiole pass through the center of the bottom of the blind hole.

[0016] Preferably, the first hole segment in step S1 and the second hole segment in step S2 are both manufactured by an electric spark punching machine.

[0017] Preferably, in step S3, an electric spark forming machine is used to widen the diameters of the first hole segment and the second hole segment.

[0018] Another object of the present invention is to provide an adjustable guide vane, so that a borescope detector can relatively smoothly enter the cross hole on the petiole for borescope detection.

[0019] To achieve this object, the present invention adopts the following technical solutions:

[0020] The adjustable guide vane comprises a petiole and a blade profile arranged on the petiole. The petiole is provided with a cross hole, which comprises a first hole section and a second hole section which are interconnected. The cross hole is processed by the above-mentioned processing method of the cross hole of the adjustable guide vane.

[0021] Another object of the present invention is to provide a compressor in which a borescope detector can relatively smoothly enter the cross hole on the petiole for borescope detection.

[0022] To achieve this object, the present invention adopts the following technical solutions:

[0023] The compressor comprises a casing and the above-mentioned adjustable guide vanes, wherein the adjustable guide vanes are mounted on the inner wall of the casing.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a method for processing an adjustable guide blade cross hole, an adjustable guide blade and a compressor. The adjustable guide blade comprises a petiole, and the petiole comprises a first end and a second end arranged opposite to each other. The method for processing the adjustable guide blade cross hole comprises: S1, processing a first hole segment with a hole diameter of D1 on the end face of the first end, the first hole segment being a blind hole, so that the axis of the blind hole forms an angle with the axis of the petiole, and the bottom of the blind hole is perpendicular to the axis of the petiole; S2, processing a second hole segment with a hole diameter of D2 on the end face of the second end along a direction parallel to the axis of the petiole, until the bottom of the blind hole is opened up so that the second hole segment is connected with the first hole segment, and the axis of the second hole segment passes through the center of the bottom of the blind hole. By first machining the first hole segment whose axis is at an angle to the axis of the petiole on the end face of the first end, and then machining the second hole segment whose axis is parallel to the axis of the petiole on the end face of the second end, until the bottom of the first hole segment is opened up so that the second hole segment is connected to the first hole segment, this machining method uses whether the bottom of the first hole segment is opened up as a standard to determine whether to continue machining the second hole segment. Compared with machining the second hole segment first and then machining the first hole segment, this method improves the control accuracy of the depth of the second hole segment, solves the problem that the second hole segment cannot be connected to the first hole segment due to being too shallow, and reduces the probability of forming a step at the connection between the second hole segment and the first hole segment. It can be seen that this machining method is conducive to realizing that the borescope detector enters the first hole segment smoothly from the second hole segment, thereby enabling the borescope detection to proceed smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a cross hole in the prior art where a deep hole is too deep to generate a step;

[0027] Figure 2 It is a schematic diagram of the structure in which the deep hole of the cross hole in the prior art is too shallow, resulting in the cross hole being disconnected;

[0028] Figure 3 It is a flowchart of the steps of the processing method of the adjustable guide vane cross hole provided by the present invention;

[0029] Figure 4 It is a schematic diagram of the cross-sectional structure of the petiole provided by the present invention;

[0030] Figure 5 is a schematic structural diagram of the adjustable guide vane provided by the present invention;

[0031] Figure 6 It is a schematic diagram of the cross-sectional structure of the petiole in which the axis of the second hole segment provided by the present invention coincides with the center of the bottom of the blind hole;

[0032] Figure 7 It is a schematic diagram of the cross-sectional structure of the petiole provided by the present invention in which the petiole axis coincides with the center of the bottom of the blind hole.

[0033] In the figure:

[0034] 11. Petiole; 12. Deep hole; 13. Shallow hole; 14. Step;

[0035] 2. Petiole; 21. First end; 22. Second end; 31. First hole segment; 32. Second hole segment; 4. Leaf shape. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] This embodiment provides a method for machining an adjustable guide vane cross hole to solve the problem that when the second hole section of the cross hole is too long or too short, the borescope detector cannot smoothly enter the cross hole, thereby causing the borescope detection to fail to proceed smoothly.

[0041] Specifically, Figure 3 to Figure 4 As shown, a method for processing an adjustable guide vane cross hole, the adjustable guide vane includes a petiole 2, the petiole 2 includes a first end 21 and a second end 22 arranged opposite to each other, and the method for processing the adjustable guide vane cross hole includes: S1, processing a first hole segment 31 with a hole diameter of D1 on the end face of the first end 21, the first hole segment 31 is a blind hole, so that the axis of the blind hole forms an angle with the axis of the petiole 2, and the bottom of the blind hole is perpendicular to the axis of the petiole 2; S2, processing a second hole segment 32 with a hole diameter of D2 on the end face of the second end 22 along a direction parallel to the axis of the petiole 2, until the bottom of the blind hole is opened up so that the second hole segment 32 is connected to the first hole segment 31, and the axis of the second hole segment 32 passes through the center of the bottom of the blind hole. By first machining the first hole section 31 whose axis is at an angle to the axis of the petiole 2 on the end surface of the first end 21, and then machining the second hole section 32 whose axis is parallel to the axis of the petiole 2 on the end surface of the second end 22, until the bottom of the first hole section 31 is opened up so that the second hole section 32 is connected to the first hole section 31, the machining method determines whether to continue machining the second hole section 32 based on whether the bottom of the first hole section 31 is opened up. Compared with machining the second hole section 32 first and then machining the first hole section 31, the control accuracy of the depth of the second hole section 32 is improved, the problem that the second hole section 32 cannot be connected to the first hole section 31 due to being too shallow is solved, and the probability of forming a step at the connection between the second hole section 32 and the first hole section 31 is reduced. It can be seen that the machining method is conducive to realizing that the borescope detector enters the second hole section 32 from the second end 22 and smoothly enters the first hole section 31 from the second hole section 32, thereby making the borescope detection go smoothly. In addition, the communication between the first hole segment 31 and the second hole segment 32 also forms a chip removal channel, so that waste chips generated when machining the second hole segment 32 can be discharged from the chip removal channel.

[0042] In actual operation, Figure 6 As shown, the processing position Q1 of the first hole segment 31 on the end surface of the first end 21, the hole depth L2 of the first hole segment 31, and the angle α between the axis Z1 of the first hole segment 31 and the end surface of the first end 21 are preset. The n value can be calculated according to the calculation formula for the side length of the right triangle, and then the position of the point Q2 on the end surface of the first end 21 is obtained. The orthographic projection of the point Q2 on the end surface of the second end 22 is the processing position Q3 of the second hole segment 32 on the end surface of the second end 22. Then, the first hole segment 31 with a depth of L2 is processed at the processing position Q1 according to the angle α, and the second hole segment 32 is processed at the processing position Q3, so that the axis Z2 of the second hole segment 32 coincides with the center of the bottom of the first hole segment 31.

[0043] Furthermore, if Figure 3 to Figure 4 As shown, step S1 also includes that when processing the first hole segment 31, the axis of the petiole 2 passes through the center of the bottom of the blind hole. On the basis that the axis of the second hole segment 32 passes through the center of the bottom of the blind hole, the axis of the petiole 2 passes through the center of the bottom of the blind hole, which means that the axis of the second hole segment 32 coincides with the axis of the petiole 2, thereby avoiding the eccentric setting of the second hole segment 32 causing the petiole 2 to break, thereby improving the quality of the adjustable guide vane and extending the service life of the adjustable guide vane. In other embodiments, the axis of the second hole segment 32 may not coincide with the axis of the petiole 2, and in this case, the center of the bottom of the first hole segment 31 does not coincide with the axis of the petiole 2.

[0044] In actual operation, Figure 7 As shown, the processing position Q4 of the first hole segment 31 on the end surface of the first end 21 is pre-set, and the angle β between the axis Z1 of the first hole segment 31 and the end surface of the first end 21 is set, and the distance h between the processing position Q4 and the axis Z3 of the petiole 2 is measured. The hole depth L2 of the first hole segment 31 can be calculated according to the right triangle side length calculation formula, and then the first hole segment 31 with a depth of L2 is processed at the processing position Q4 according to the angle β, so that the center of the bottom of the first hole segment 31 coincides with the axis Z3 of the petiole 2. When processing the second hole segment 32, the axis Z2 of the second hole segment 32 is directly made to coincide with the center position of the second end 22 of the petiole 2, so that the axis Z2 of the second hole segment 32 coincides with the axis Z3 of the petiole 2, and then the center of the bottom of the blind hole coincides with the axis Z2 of the second hole segment 32.

[0045] Alternatively, if Figure 3 to Figure 4 As shown, the first hole segment 31 in step S1 and the second hole segment 32 in step S2 are both made by electrospark punching machine. The electrospark punching machine first processes the first hole segment 31 with a depth of L2, and then processes the second hole segment 32. When the bottom of the first hole segment 31 is punched through, the second hole segment 32 is connected to the first hole segment 31. At this time, the depth of the second hole segment 32 is L1. Using the electrospark punching machine, high-precision punching at the sub-millimeter level can be achieved, which can meet the processing requirements of the cross hole for dimensional accuracy. There is no direct mechanical contact between the tool electrode and the adjustable guide vane, which avoids the deformation of the adjustable guide vane and tool wear caused by mechanical force. In other embodiments, the first hole segment 31 and the second hole segment 32 can also be processed by a laser punching machine. It should be noted that the electrospark punching machine and the laser punching machine are both commonly used punching machines in the prior art, and will not be repeated here.

[0046] It should be noted that the maximum hole diameter of the electric spark punching machine is 3 mm. Therefore, in this embodiment, the hole diameter D1 of the first hole segment 31 and the hole diameter D2 of the second hole segment 32 are both 3 mm. Of course, in other embodiments, D1 and D2 may be other hole diameters less than 3 mm to meet the detection requirements of different models of borescope detectors.

[0047] Furthermore, D2 is equal to D1. The aperture of the first hole segment 31 is equal to the aperture of the second hole segment 32, which further reduces the probability of forming a step at the connection position between the second hole segment 32 and the first hole segment 31, making the connection between the first hole segment 31 and the second hole segment 32 smoother, so that the borescope detector can penetrate into the second hole segment 32 from the second end 22 and smoothly enter the first hole segment 31 from the second hole segment 32, and can also enable the borescope detector to smoothly retreat from the first hole segment 31 to the second hole segment 32 and exit the second hole segment 32 from the second end 22. In other embodiments, D2 may be smaller than D1 or D2 may be larger than D1.

[0048] Optionally, the processing method of the cross hole of the adjustable guide vane further includes S3, widening the aperture of the second hole segment 32 to D21, and widening the aperture of the first hole segment 31 to D11. By widening the apertures of the first hole segment 31 and the second hole segment 32, the borescope detector can more smoothly penetrate into the second hole segment 32 from the second end 22 and smoothly enter the first hole segment 31 from the second hole segment 32, and can also meet the entry of large-sized borescope detectors. In this embodiment, the aperture of the second hole segment 32 is widened first and then the aperture of the first hole segment 31 is widened. In other embodiments, the aperture of the first hole segment 31 may be widened first and then the aperture of the second hole segment 32, or the apertures of the first hole segment 31 and the second hole segment 32 may be widened at the same time. In addition, the waste chips generated by widening the first hole segment 31 and the second hole segment 32 can be discharged from the chip removal channel to avoid the waste chips in the first hole segment 31 and the second hole segment 32 from affecting the widening process, thereby improving the dimensional accuracy of D11 and D21.

[0049] Optionally, between step S2 and step S3, the process further includes flushing out dirt in the first hole segment 31 and the second hole segment 32. Flushing out dirt in the first hole segment 31 and the second hole segment 32 further prevents waste chips in the first hole segment 31 and the second hole segment 32 from affecting the widening process, so as to further improve the dimensional accuracy of D11 and D21.

[0050] Optionally, in step S3, an electrospark forming machine is used to widen the aperture of the first hole segment 31 and the second hole segment 32. A forming electrode is designed according to the final processing aperture D21, and the forming electrode is used to widen the aperture of the second hole segment 32 on the electrospark forming machine. The electrode rotates and feeds downward, and the aperture of the second hole segment 32 is widened from D2 to D21. The feeding depth of the second hole segment 32 is L1, and the debris is discharged from the cross hole along the chip removal channel; a forming electrode is designed according to the final processing aperture D11, and the forming electrode is used to widen the aperture of the first hole segment 31 on the electrospark forming machine. The electrode rotates and feeds downward, and the aperture of the first hole segment 31 is widened from D1 to D11. The feeding depth of the first hole segment 31 is L2, and the debris is discharged from the cross hole along the chip removal channel. The electrospark forming machine can achieve high-precision aperture widening operations through a precise control system, and can complete the task of aperture widening in a short time, which can effectively improve production efficiency.

[0051] Optionally, when widening the first hole segment 31 and the second hole segment 32, D21 is made equal to D11, so as to reduce the probability of forming a step at the connection position between the widened first hole segment 31 and the widened second hole segment 32, so that the borescope detector can more smoothly enter the first hole segment 31 from the second hole segment 32, and the borescope detector can more smoothly retreat from the first hole segment 31 to the second hole segment 32. In other embodiments, D11 may be smaller than or larger than D21.

[0052] Furthermore, the processing method of the cross hole of the adjustable guide vane also includes: S4, flushing the outer surface of the adjustable guide vane, the inside of the first hole section 31, and the inside of the second hole section 32. The surface of the adjustable guide vane and the inside of the cross hole are cleaned by flushing to meet the storage standard of the adjustable guide vane, so as to facilitate the direct use of the adjustable guide vane.

[0053] This embodiment also provides an adjustable guide vane, and the borescope detector can relatively smoothly enter the cross hole on the petiole 2 to perform borescope detection.

[0054] Specifically, Figure 4 and Figure 5 As shown, the adjustable guide vane includes a petiole 2 and a blade profile 4 arranged on the petiole 2. The petiole 2 is provided with a cross hole, and the cross hole includes a first hole segment 31 and a second hole segment 32 that are connected to each other. The cross hole is processed by the above-mentioned processing method of the cross hole of the adjustable guide vane. The adjustable guide vane processed by the above-mentioned processing method of the cross hole of the adjustable guide vane has a high probability of the first hole segment 31 and the second hole segment 32 on the petiole 2 being connected, and a low probability of a step existing at the connection position between the first hole segment 31 and the second hole segment 32. The borescope detector can enter the cross hole on the petiole 2 relatively smoothly, so that the borescope detector can smoothly detect the adjustable guide vane. The blade profile 4 is connected and fixed to the end face of the first end 21 on the petiole 2, so that the integrity of the adjustable guide vane is better.

[0055] This embodiment further provides a compressor, and the borescope detector can relatively smoothly enter the cross hole on the petiole 2 to perform borescope detection.

[0056] Specifically, the compressor includes a housing and the above-mentioned adjustable guide vanes, and the adjustable guide vanes are installed on the inner wall of the housing. The first hole segment 31 on the blade stalk 2 is connected to the second hole segment 32, and the probability of a step existing at the connection position between the second hole segment 32 and the second hole segment 32 is low, and the borescope detector can smoothly enter the cross hole on the blade stalk 2, so that the borescope detector can smoothly detect the adjustable guide vanes of the compressor.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for processing cross holes of adjustable guide vanes, characterized in that: The adjustable guide vane comprises a petiole (2), wherein the petiole (2) comprises a first end (21) and a second end (22) arranged opposite to each other, and a method for processing a cross hole of the adjustable guide vane comprises: S1, machining a first hole segment (31) with a hole diameter of D1 on the end surface of the first end (21), wherein the first hole segment (31) is a blind hole, so that the axis of the blind hole forms an angle with the axis of the petiole (2), and the bottom of the blind hole is perpendicular to the axis of the petiole (2); S2. A second hole segment (32) having a hole diameter of D2 is machined on the end surface of the second end (22) along a direction parallel to the axis of the petiole (2), until the bottom of the blind hole is opened up so that the second hole segment (32) is connected to the first hole segment (31), and the axis of the second hole segment (32) passes through the center of the bottom of the blind hole.

2. The method for machining the cross hole of the adjustable guide vane according to claim 1, characterized in that: The processing method of the adjustable guide vane cross hole also includes: S3, widening the aperture of the second hole segment (32) to D21; and widening the aperture of the first hole segment (31) to D11.

3. The method for machining the cross hole of the adjustable guide vane according to claim 2, characterized in that: Between step S2 and step S3, the method further includes: flushing out dirt in the first hole section (31) and the second hole section (32).

4. The method for machining the cross hole of the adjustable guide vane according to claim 2, characterized in that: Make D21 equal to D11.

5. The method for machining the cross hole of the adjustable guide vane according to claim 1, characterized in that: The step S1 further comprises: when machining the first hole segment (31), making the axis of the petiole (2) pass through the center of the bottom of the blind hole.

6. The method for machining the cross hole of an adjustable guide vane according to any one of claims 1 to 5, characterized in that: The first hole segment (31) in step S1 and the second hole segment (32) in step S2 are both manufactured by electrospark drilling machine.

7. The method for machining the cross hole of an adjustable guide vane according to any one of claims 2 to 5, characterized in that: In the step S3, an electric spark forming machine is used to widen the diameters of the first hole section (31) and the second hole section (32).

8. An adjustable guide vane, comprising a petiole (2) and a blade profile (4) arranged on the petiole (2), characterized in that: The petiole (2) is provided with a cross hole, the cross hole comprising the first hole segment (31) and the second hole segment (32) which are interconnected, and the cross hole is processed by the processing method of the cross hole of the adjustable guide vane according to any one of claims 1 to 7.

9. A compressor, characterized in that: The invention comprises a housing and the adjustable guide vane according to claim 8, wherein the adjustable guide vane is mounted on an inner wall of the housing.

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