A processing method of a compressor slot type handling case suitable for small space test

Abstract

The application discloses a processing method of a compressor slit type processing casing suitable for small space test, which comprises the following steps: 1) processing a metal blank into a metal casing; 2) processing micro grooves on the inner wall surface of the metal casing; 3) mold manufacturing: the mold is matched with the slit size of the preset slit type processing casing, and the number of the mold is the same as the number of the slit of the preset slit type processing casing; 4) embedding the multiple molds into the multiple micro grooves of the metal casing respectively; 5) smearing resin material on the inner wall surface of the metal casing until the smearing thickness is greater than the height of the mold, and the resin material is adhered to the inner wall surface of the metal casing after being solidified for 24 hours, so as to form a resin casing; 6) processing the inner wall surface of the resin casing into an inner profile surface for preset test, and the mold is turned to be flush with the inner profile surface; and 7) adopting electric spark to burn the mold, and the test piece is processed. The application realizes the processing of the compressor processing casing suitable for small space test.

Description

Technical Field

[0001] This invention relates to the field of compressor casing processing technology, and more specifically to a processing method for a slotted compressor casing suitable for small-space testing. Background Technology

[0002] The function of an air compressor is to compress incoming air, increasing its pressure and temperature to meet the demands of the downstream combustion chamber. Due to the compressor's operating function, the internal flow is under a strong adverse pressure gradient, making it prone to flow separation. Combined with the complex flow at the rotor blade tip clearances, this can easily lead to compressor stall. Slotted treatment casings are a passive control method to improve compressor stability; however, their stability enhancement mechanism is not yet fully understood. Experimental methods are one of the most effective ways to study the stability enhancement performance and mechanism of treatment casings.

[0003] However, due to the increasing diversity of cross-sectional shapes of slotted compressor casings, the difficulty and cost of testing and manufacturing have increased. This is especially true for small compressors, where the internal operating space is further compressed, further increasing the manufacturing difficulty.

[0004] Therefore, providing a processing method for a slotted casing of a compressor suitable for small-space testing is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a processing method for a slit-type treatment casing of a compressor for small-space testing, which enables the processing of the treatment casing of a compressor for small-space testing while ensuring the processing accuracy of the treatment casing, thereby shortening the manufacturing cycle and saving costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for manufacturing a slotted casing for a compressor used in small-space testing includes the following sequential steps:

[0008] 1) Machining the metal blank into a metal casing;

[0009] 2) Micro-grooves are machined on the inner wall surface of the metal casing;

[0010] 3) Mold manufacturing: The mold is matched with the pre-set slot size of the slot processing casing, and the number of molds is the same as the number of slots in the pre-set slot processing casing;

[0011] 4) Insert multiple molds into multiple micro-grooves in the metal casing;

[0012] 5) Apply resin material to the inner wall of the metal casing until the coating thickness is greater than the height of the mold. After the resin material is left to stand and cure for 24 hours, it will adhere to the inner wall of the metal casing to form a resin casing.

[0013] 6) The inner wall of the resin casing is machined into a pre-designed inner surface for testing, and the mold is machined to be flush with the inner surface.

[0014] 7) The mold is sintered using electrical discharge machining (EDM) to complete the test piece processing.

[0015] By adopting the above technical solutions, the beneficial effects of the present invention are as follows:

[0016] By processing the casing in two parts, inner and outer, respectively, the processing of the compressor casing for small-space testing can be achieved while ensuring the processing accuracy of the casing, thus shortening the manufacturing cycle and saving costs.

[0017] Furthermore, in step 3), the height of the mold is greater than the pre-set slit height of the slit processing casing plus the height of the micro-groove.

[0018] Furthermore, the metal blank is a steel blank or an aluminum blank.

[0019] Furthermore, the cross-section of the seam is rectangular, semi-circular, streamlined, or zigzag. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 The attached figure is a cross-sectional view of the test piece after processing provided by the present invention;

[0022] Figure 2 The attached figure is a structural schematic diagram of the mold provided by the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1 , 2As shown, this embodiment of the invention discloses a processing method for a slotted casing of a compressor used in small-space testing, comprising the following sequential steps:

[0025] 1) The metal blank is processed into a metal casing 1; in this embodiment, the metal blank is a steel blank or an aluminum blank, and the processing method is turning, milling, etc. The inner diameter and outer diameter of the metal casing 1 meet the test requirements.

[0026] 2) Micro-grooves 11 are machined on the inner wall surface of the metal casing 1;

[0027] 3) Mold manufacturing: The mold 2 matches the slot size of the preset slot processing casing, and the number of molds 2 is the same as the number of slots 3 of the preset slot processing casing; in this embodiment, the height of mold 2 is greater than the height of slot 3 of the preset slot processing casing + the height of micro groove 11.

[0028] 4) Insert multiple molds 2 into multiple micro grooves 11 of the metal casing 1 to ensure that they will not loosen during subsequent turning; so that the subsequent resin material has a larger contact area with the inner wall of the metal casing 1.

[0029] 5) Apply resin material to the inner wall of metal casing 1 until the coating thickness is greater than the height of mold 2. After 24 hours of static curing, the resin material adheres to the inner wall of metal casing 1 to form resin casing 4. The use of resin material reduces weight on the one hand and prevents scratching with rotor blades on the other.

[0030] 6) The inner wall surface of the resin casing 4 is machined into a pre-designed inner surface for testing, and a certain degree of smoothness is ensured. At the same time, the mold 2 is turned to be flush with the inner surface. The inner wall surface of the resin casing 4 is machined by turning.

[0031] 7) The mold 2 was sintered by electric spark, and the test piece was completed.

[0032] This invention processes the casing into inner and outer parts sequentially, thereby enabling the processing of compressor casings for small-space testing while ensuring the processing accuracy of the casing, thus shortening the manufacturing cycle and saving costs.

[0033] Specifically, the cross-section of seam 3 is rectangular, semi-circular, streamlined, or zigzag. In this embodiment, the cross-section of seam 3 is rectangular.

[0034] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A processing method for a slotted casing of a compressor used in small-space testing, characterized in that, Includes the following sequential steps: 1) Machining the metal blank into a metal casing; 2) Micro-grooves are machined on the inner wall surface of the metal casing; 3) Mold manufacturing: The mold is matched with the pre-set slot size of the slot processing casing, and the number of molds is the same as the number of slots in the pre-set slot processing casing; 4) Insert multiple molds into multiple micro-grooves in the metal casing; 5) Apply the resin material to the inner wall of the metal casing until the coating thickness is greater than the height of the mold. After the resin material is left to stand and cure for 24 hours, it will adhere to the inner wall of the metal casing to form a resin casing. 6) The inner wall of the resin casing is machined into a pre-designed inner surface for testing, and the mold is machined to be flush with the inner surface. 7) The mold is sintered using electrical discharge machining (EDM), and the test piece is now complete. In step 3), the height of the mold is greater than the pre-set slit height of the slit processing casing plus the height of the micro-groove.

2. The processing method for a slotted casing of a compressor used in small-space testing, as described in claim 1, is characterized in that... The metal blank is a steel blank or an aluminum blank.

3. The processing method for a slotted casing of a compressor used in small-space testing, as described in claim 1, is characterized in that... The cross-section of the seam is rectangular, semi-circular, streamlined, or zigzag.

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