Compressor shell

Abstract

The utility model discloses a compressor shell, which comprises an upper shell and a lower shell which are connected with each other, the upper shell is provided with an upper shell spigot, the lower shell is provided with a lower shell spigot, the upper shell spigot is provided with a first chamfer and / or a first taper, the lower shell spigot is provided with a step structure, and the step structure is provided with a second chamfer and / or a second taper. A second chamfer and / or a second taper are / is arranged on the inner wall of the upper portion of the step structure. The first chamfer and / or the first taper are / is inserted into the step structure, and are / is welded with the upper shell seam allowance at the second chamfer and / or the second taper to form a welding seam. According to the compressor shell, the chamfer and / or the taper are / is arranged at the seam allowance of the shell of the compressor, so that an assembly guiding effect can be achieved, the problem that the compressor is difficult to assemble in the assembling process of the upper shell is solved, burrs and flashes at the seam allowance of the lower shell can be removed, the seam allowance of the lower shell does not need to be specially polished and cleaned, and the production efficiency is improved. And the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor production, in particular to a compressor shell. Background Art

[0002] At present, during the production process of the lower shell of a reciprocating piston compressor, there is generally no taper angle or taper guide end at the stop. The shell is formed by stamping. When the stop is peeled or trimmed, flash and flange will be generated at the stop. At the same time, during the assembly of the compressor, it is necessary to use external force to knock the upper shell to make the upper shell assembled in place. When subjected to external force, the flash and flange of the stop are easy to fall into the shell, forming impurities and causing the compressor to be stuck and completely fail. The lower shell of the existing compressor has no chamfer and no taper at the stop, which makes it difficult to assemble the compressor during the assembly process of the upper shell. The compressor even gets stuck on the assembly production line. After troubleshooting the stuck fault, solid impurities were found. After analyzing the shape and spectrum of the impurities, it was confirmed that the impurities were flash impurities generated by the stop of the lower shell. The existing shell stamping method generates impurities and makes assembly difficult, which not only affects production efficiency, but also creates more serious quality risks. Summary of the invention

[0003] The purpose of the utility model is to provide a compressor housing in view of the problems existing in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A compressor housing comprises an upper housing and a lower housing connected to each other, the upper housing having an upper housing stop, the lower housing having a lower housing stop, the upper housing stop being provided with a first chamfer and / or a first taper, the lower housing stop being provided with a step structure, the upper inner wall of the step structure being provided with a second chamfer and / or a second taper; the first chamfer and / or the first taper being inserted into the step structure, and being welded to the upper housing stop at the second chamfer and / or the second taper to form a weld.

[0006] The compressor housing can serve as an assembly guide by arranging a chamfer and / or a taper at the stop of the compressor housing, thereby overcoming the problem of difficulty in assembling the compressor during the upper housing assembly process. This method can also remove burrs and flash at the stop of the lower housing, without the need to specially grind and clean the stop of the lower housing, thereby improving production efficiency.

[0007] The existence of the chamfer can prevent the lower shell from being bumped and bulged during transportation, which would increase the difficulty of assembly. It can also prevent the burrs and flanges at the stop of the lower shell from falling into the compressor during assembly, greatly reducing the number of stuck machines on the assembly line, reducing quality risks caused by impurities, and improving product quality and reliability.

[0008] The second chamfer and / or the second taper is set at the stop of the lower shell, and an accommodating space can be formed there when it is assembled and connected with the upper shell. For example, the upper and lower shells are equivalent to adding a molten pool in airflow shielded welding or other methods such as laser welding. The molten welding fluid makes the weld full and uniform after solidification in the molten pool, and also reduces the overflow of welding fluid to form welding slag, thereby improving the welding strength and making the weld beautiful.

[0009] For the upper shell stop, only one of the first chamfer and the first taper can be set, or both can be set; similarly, for the lower shell stop, only one of the second chamfer and the second taper can be set, or both can be set.

[0010] In some embodiments, the angle of the second chamfer is 5 to 25 degrees, and the second taper is 1 to 5 degrees.

[0011] In some embodiments, the depth of the second chamfer is 1 to 6 mm. By limiting the chamfer angle range and depth range, the compressor housing will not have obvious abnormalities during assembly or operation, and the assembly is smooth, and there is no abnormality such as jamming or high power. There is no leakage in batch ring welding, and the weld appearance is full and uniform.

[0012] Furthermore, the step structure includes a horizontal annular portion and a vertical peripheral wall portion, the second chamfer or the second taper is arranged on the inner side of the vertical peripheral wall portion, and the width of the horizontal annular portion is greater than the thickness of the upper shell stop.

[0013] Furthermore, the height of the first chamfer or the first taper is not greater than the height of the vertical peripheral wall portion.

[0014] Furthermore, the weld is a circumferential weld, and the maximum height of the weld protruding from the upper end surface of the step structure does not exceed 1.6 mm.

[0015] Furthermore, the step structure and the second chamfer or the second taper are both integral structures formed by die-casting of the lower shell, and the first chamfer and / or the first taper are both integrally formed by die-casting of the upper shell.

[0016] In some embodiments, a compressor housing includes an upper housing and a lower housing connected to each other, the upper housing having an upper housing stop, the lower housing having a lower housing stop, the lower housing stop being provided with a first chamfer and / or a first taper, the upper housing stop being provided with a step structure, and the upper inner wall of the step structure being provided with a second chamfer and / or a second taper; the first chamfer and / or the first taper are inserted into the step structure, and are welded to the lower housing stop at the second chamfer and / or the second taper to form a weld.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: 1. The compressor housing can serve as an assembly guide by arranging chamfers and / or tapers at the stop of the compressor housing, thereby overcoming the problem of difficulty in assembling the compressor during the assembly of the upper housing. This method can also remove burrs and flash at the stop of the lower housing, without the need to specially grind and clean the stop of the lower housing, thereby improving production efficiency; 2. Due to the existence of the chamfer, the lower housing is prevented from being bumped and bulged during transportation, which increases the difficulty of assembly. At the same time, the burrs and flanges that have not been cleaned at the stop of the lower housing can be prevented from falling into the compressor during assembly, thereby greatly reducing the jamming and failure of the assembly line, reducing quality risks caused by impurities, and improving product quality and reliability; 3. The second chamfer and / or the second taper are arranged at the stop of the lower housing, which is equivalent to adding a molten pool in the upper and lower housings during airflow shielded welding or other methods such as laser welding. The molten welding fluid makes the weld full and uniform after solidification in the molten pool, and also reduces the overflow of the welding fluid to form welding slag, thereby improving the welding strength and making the weld beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a compressor housing of the utility model;

[0019] Figure 2 for Figure 1 The following is a schematic cross-sectional view with the shell axis as the cutting position;

[0020] Figure 3 This is a schematic diagram of the taper of the stopper of the lower shell of the utility model;

[0021] Figure 4 This is a schematic diagram of the utility model with the axis of the tapered lower shell as the section position;

[0022] Figure 5 This is a schematic diagram of the chamfered upper cover of the utility model;

[0023] Figure 6 This is a partial schematic diagram of the utility model with a tapered upper cover stop;

[0024] In the figure: 1. upper shell; 101. upper shell stop; 2. lower shell; 201. lower shell stop; 3. first chamfer; 4. first taper; 5. step structure; 501. horizontal annular portion; 502. vertical peripheral wall portion; 6. second chamfer; 7. second taper; 8. weld; 9. welding gun. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Embodiment 1:

[0027] like Figure 1 to Figure 6 As shown, a compressor housing comprises an upper housing 1 and a lower housing 2 connected to each other, the upper housing 1 having an upper housing stop 101, the lower housing 2 having a lower housing stop 201, the upper housing stop 101 being provided with a first chamfer 3 or a first taper 4, the lower housing stop 201 being provided with a step structure 5, the upper inner wall of the step structure 5 being provided with a second chamfer 6 or a second taper 7; the first chamfer 3 or the first taper 4 being inserted into the step structure 5, and being welded to the outer wall of the upper housing stop 101 at the second chamfer 6 or the second taper 7 by a welding gun 9 to form a weld 8.

[0028] The compressor housing can serve as an assembly guide by arranging a chamfer and / or a taper at the stop of the compressor housing, thereby overcoming the problem of difficulty in assembling the compressor during the upper housing assembly process. This method can also remove burrs and flash at the stop of the lower housing, without the need to specially grind and clean the stop of the lower housing, thereby improving production efficiency.

[0029] The existence of chamfers or tapers can prevent the lower shell from being bumped and bulged during transportation, which would increase the difficulty of assembly. It can also prevent the burrs and flanges at the stop of the lower shell from falling into the compressor during assembly, greatly reducing the number of stuck machines on the assembly line, reducing quality risks caused by impurities, and improving product quality and reliability.

[0030] The second chamfer 6 and / or the second taper 7 are arranged at the lower shell stop 201, and an accommodating space can be formed therein when assembled and connected with the upper shell 1. For example, the upper and lower shells are welded in airflow shielded welding or other methods such as laser welding, which is equivalent to adding a molten pool. The molten welding fluid makes the weld full and uniform after solidification in the molten pool, reduces the overflow of the welding fluid to form welding slag, improves the welding strength and also makes the weld 8 beautiful.

[0031] The upper and lower shells of the compressor are made by blanking process, which includes the steps of first stretching, second stretching, trimming and forming in sequence. The chamfer or taper is formed by pressing the forming punch in the forming step. The setting of the chamfer or taper is equivalent to flanging the stop burr by pressing. That is to say, the chamfer and taper of the lower shell of the compressor are formed in one piece during the pressing process, and there is no need to process the inner angle or taper later, which makes the shell production efficiency higher.

[0032] In some embodiments, the angle of the second chamfer 6 is 5-25°, and the second taper 7 is 1-5°. Preferably, the angle of the second chamfer 6 is 7-18°, and the second taper 7 is 1-3°.

[0033] In some embodiments, the depth of the second chamfer 6 is 1 to 6 mm. Preferably, the depth of the second chamfer 6 is 2 to 4 mm.

[0034] By limiting the chamfer angle range and depth range mentioned above, the compressor will not have obvious abnormal phenomena during assembly or operation. Not only is the assembly smooth, but there are no abnormalities such as jamming or high power. There is no leakage in batch ring welding, the appearance is full and uniform, and the service life is long. However, when the depth is too small or too large, and the angle is too small or too large, the compressor is prone to abnormalities during assembly, and jamming, high power, weld leakage and other problems will also occur during subsequent operation.

[0035] Furthermore, the step structure 5 includes a horizontal annular portion 501 and a vertical peripheral wall portion 502, the second chamfer 6 or the second taper 7 is arranged on the inner side of the vertical peripheral wall portion 502, and the width of the horizontal annular portion 501 is greater than the thickness of the upper shell stop 101, which can prevent the upper shell stop 101 from falling into the cavity of the lower shell 2.

[0036] The step structure of this structure is relatively simple and easy to manufacture by pressing. The horizontal annular portion 501 can be used to support the upper shell stop 101, and the vertical peripheral wall portion 502 can be used to limit the upper shell stop 101, so that the upper shell 1 can be accurately assembled to the predetermined position of the lower shell 2.

[0037] Furthermore, the height of the first chamfer 3 or the first taper 4 is not greater than the height of the vertical peripheral wall portion 502, so that the first chamfer 3 and the first taper 4 are both within the range of the step structure 5 when the upper and lower shells are assembled.

[0038] Furthermore, the weld 8 is a circumferential weld, and the maximum height of the weld 8 protruding from the upper end surface of the step structure does not exceed 1.6 mm, that is, the weld will basically not form obvious marks on the periphery of the compressor housing, forming a weld structure with good surface quality, and the connection between the upper and lower housings is more beautiful after assembly.

[0039] Furthermore, the step structure 5 and the second chamfer 6 or the second taper 7 are all integral structures formed by die-casting of the lower shell 2, and the first chamfer 3 and / or the first taper 4 are integrally formed structures with the upper shell 1. By setting a stop transition external chamfer or an outwardly excessive taper in the forming punch for making the compressor shell, the chamfer or internal taper is pressed out together with the main body during the shell press-forming process, thereby avoiding subsequent chamfer or taper machining, and also dealing with burrs and flanging problems at the stop of the lower shell while forming the internal chamfer and taper, thereby avoiding subsequent grinding and cleaning work, and improving production efficiency as a whole. The chamfer or taper produced in this way is also more beautiful and has better consistency with the shell body. Embodiment 2:

[0040] In some embodiments, a compressor housing includes an upper housing and a lower housing connected to each other, the upper housing having an upper housing stop, the lower housing having a lower housing stop, the lower housing stop being provided with a first taper, the upper housing stop being provided with a step structure, the upper inner wall of the step structure being provided with a second chamfer and / or a second taper; the first taper is inserted into the step structure, and is welded to the lower housing stop at the second chamfer and / or the second taper to form a weld.

[0041] The meaning expressed by this embodiment and embodiment 1 is that at least one of the upper shell and the lower shell of the compressor shell is provided with the step structure, and the second chamfer and / or the second taper, thereby reducing the difficulty of assembling the compressor shell and reducing the problems such as compressor abnormality caused by the shell stop, and at the same time facilitating the welding connection of the upper and lower shells and the formation of the weld. Usually, the compressor shell is designed in the manner of embodiment 1. Embodiment 3:

[0042] In this embodiment, an inner chamfer (the second chamfer 6) is arranged at the stop 201 of the lower shell. The depth of the inner chamfer is 2.0 mm, and the angle of the inner chamfer is 7°. The upper shell and the lower shell fit together normally. During the repeated batch assembly of the compressor, the upper shell and the lower shell are assembled in place. A 1000-hour high-temperature life test of 8 compressors was arranged. The compressor passed the entire high-temperature life test without any abnormalities such as sticking or high power. There was no leakage in the batch ring welding, and the appearance was full and uniform. Embodiment 4:

[0043] In this embodiment, an inner chamfer (the second chamfer 6) is set at the lower shell stop 201, the inner chamfer depth is 4.0mm, the inner chamfer angle is 18°, the upper shell and the lower shell are matched normally, the upper shell and the lower shell are assembled in place during the batch repeated assembly of the compressor, and the 1000-hour high-temperature life test of 8 compressors is arranged. The compressor passes the entire high-temperature life test without abnormalities such as stuck or high power, and there is no leakage in the batch ring welding, and the appearance is full and uniform. Regularly check the forming mold, and there is no abnormality in the chamfer of the outer edge of the forming punch, and the chamfer is intact.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compressor housing, comprising an upper housing and a lower housing connected to each other, wherein the upper housing has an upper housing stop, and the lower housing has a lower housing stop, It is characterized in that The upper shell stop is provided with a first chamfer and / or a first taper, the lower shell stop is provided with a step structure, and the upper inner wall of the step structure is provided with a second chamfer and / or a second taper; the first chamfer and / or the first taper are inserted into the step structure, and are welded to the upper shell stop at the second chamfer and / or the second taper to form a weld.

2. The compressor housing according to claim 1, It is characterized in that The angle of the second chamfer is 5 to 25 degrees, and the second taper is 1 to 5 degrees.

3. The compressor housing according to claim 1, It is characterized in that The depth of the second chamfer is 1 to 6 mm.

4. The compressor housing according to claim 1, It is characterized in that The step structure includes a horizontal annular portion and a vertical peripheral wall portion, the second chamfer or the second taper is arranged on the inner side of the vertical peripheral wall portion, and the width of the horizontal annular portion is greater than the thickness of the upper shell stop.

5. The compressor housing according to claim 4, It is characterized in that The height of the first chamfer or the first taper is not greater than the height of the vertical peripheral wall portion.

6. The compressor housing according to claim 1, It is characterized in that The weld is a circumferential weld, and the maximum height of the weld protruding from the upper end surface of the step structure does not exceed 1.6 mm.

7. The compressor housing according to claim 1, It is characterized in that The step structure and the second chamfer or the second taper are both integral structures formed by die-casting of the lower shell, and the first chamfer and / or the first taper are both integrally formed by die-casting of the upper shell.

8. A compressor housing, comprising an upper housing and a lower housing connected to each other, wherein the upper housing has an upper housing stop, and the lower housing has a lower housing stop. It is characterized in that The lower shell stop is provided with a first chamfer and / or a first taper, the upper shell stop is provided with a step structure, and the upper inner wall of the step structure is provided with a second chamfer and / or a second taper; the first chamfer and / or the first taper are inserted into the step structure, and are welded to the lower shell stop at the second chamfer and / or the second taper to form a weld.

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