Volute super martensitic stainless steel casting for turbine compressor

Abstract

The volute super martensitic stainless steel casting for the turbine compressor comprises a volute casting, a containing groove is formed in one end of the volute casting, an air outlet module casting is arranged in the containing groove, and the air outlet module casting is detachably connected with the volute casting. A plurality of guide sliding grooves are formed in the inner wall face of the containing groove, and fool-proof protruding blocks are arranged at local positions of the containing groove. A guide raised line is integrally arranged on the outer surface of the air outlet module casting at the position aligned with each guide chute; a positioning groove is formed in the air outlet module casting at the position aligned with the fool-proof convex block; a trumpet-shaped air outlet through hole is formed in the air outlet module casting; a plurality of sealing rings are arranged between the air outlet module casting and the storage groove, and the outer surface of the air outlet module casting and the inner wall face of the storage groove are sealed through the sealing rings. According to the technical scheme, the structural design is reasonable, the machining difficulty can be reduced, large-scale machining and quality control are facilitated, the manufacturing cost can be reduced, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine compressors, in particular to a super martensitic stainless steel casting of a volute for a turbine compressor. Background Art

[0002] A turbo compressor is a dynamic compressor with a high-speed rotating impeller. It relies on the interaction between the rotating impeller and the airflow to increase the gas pressure, while accelerating the airflow to obtain kinetic energy. The airflow then decelerates in the diffuser, converting the kinetic energy into pressure energy, further increasing the pressure. The gas flow is continuous during the compression process. The turbo compressor was developed on the basis of the ventilator. It is widely used in various process to transport air and various gases and increase their pressure.

[0003] The turbine casing air outlet of a traditional turbine compressor is trumpet-shaped. If the trumpet-shaped air outlet is processed when processing the outlet end face, since the equipment is a machining center, a special forming tool needs to be made, the processing cost is high, and the tool applicability is poor. In addition, there is a step at the rear end of the trumpet-shaped air outlet, and the relevant dimensions are marked from the end face of the intermediate shell connection end. Measurement needs to be performed from the intermediate shell connection end, which increases the difficulty of processing and dimensional control, and is not conducive to mass processing and quality control.

[0004] At present, the conventional processing method is to machine the trumpet-shaped air outlet together with the intermediate shell connection end. However, since the intermediate shell connection end is inherently complex and requires more processing, it is the processing bottleneck of the entire process. In addition, the trumpet-shaped air outlet has a large blank margin and a relatively deep processing depth, which further affects production capacity and is not conducive to reducing costs. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a super martensitic stainless steel casting for a volute of a flat compressor which has a reasonable structural design, can reduce processing difficulty, is conducive to mass processing and quality control, can reduce manufacturing costs and has good practicality.

[0006] To achieve the above object, the utility model provides the following technical solution: a super martensitic stainless steel casting for a turbine compressor, comprising a volute casting, one end of the volute casting is provided with a placement groove, an air outlet module casting is provided in the placement groove, and the air outlet module casting is detachably connected to the volute casting;

[0007] A plurality of guide grooves are arranged on the inner wall surface of the storage groove, and fool-proof bumps are arranged at local positions of the storage groove;

[0008] The outer surface of the air outlet module casting is integrally provided with a guide convex strip aligned with each guide slot position, and the air outlet module casting is provided with a positioning groove aligned with the anti-fool convex block position;

[0009] A trumpet-shaped air outlet through hole is provided in the air outlet module casting;

[0010] A plurality of sealing rings are arranged between the air outlet module casting and the object placement groove, and a seal is formed between the outer surface of the air outlet module casting and the inner wall surface of the object placement groove through the sealing rings.

[0011] The utility model is further configured as follows: the volute casting is provided with a volute through hole aligned with the trumpet-shaped air outlet through hole, and the volute through hole is communicated with the trumpet-shaped air outlet through hole.

[0012] The utility model is further configured as follows: the volute through hole is a circular through hole, and the trumpet-shaped air outlet through hole is a conical through hole.

[0013] The utility model is further configured as follows: the air outlet module casting is a rectangular structure, the object placement groove is a rectangular groove, and the size of the air outlet module casting matches the size of the object placement groove.

[0014] The utility model is further configured as follows: a step surface is provided in the storage groove, a connecting protrusion is integrally provided at the groove mouth of the storage groove on the air outlet module casting, a plurality of bolt through holes are provided on the connecting protrusion, a fixing bolt is provided in each bolt through hole, a plurality of threaded blind holes corresponding to the positions of the bolt through holes are provided on the step surface, and the connecting protrusion is fixed to the step surface by locking with fixing bolts.

[0015] The utility model is further configured as follows: the volute casting and the air outlet module casting are both made of super martensitic stainless steel, and a sealing ring installation groove is provided at the groove mouth end of the air outlet module casting away from the storage groove, and the sealing ring includes an O-ring, and the O-ring is installed in the sealing ring installation groove.

[0016] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model has a reasonable structural design, the air outlet module casting and the volute casting can be cast separately, and the trumpet-shaped air outlet hole in the air outlet module casting can be processed separately, and the tools used in the existing machining center can be used directly, without the need to make special molding tools, which effectively reduces the machining cost and has good applicability of the tools; after the trumpet-shaped air outlet hole is processed, the air outlet module casting is assembled to the volute casting and fastened with bolts; the structural design is reasonable, the air outlet module casting and the volute casting are easy to manufacture, which effectively reduces the machining difficulty and is conducive to mass processing and quality control, and mass processing is conducive to reducing manufacturing costs and has good practicality.

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 for Figure 1 The enlarged schematic diagram of the middle part I;

[0020] Figure 3 It is a cross-sectional schematic diagram of a volute casting according to an embodiment of the utility model;

[0021] Figure 4 It is a schematic cross-sectional view of the air outlet module casting according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] See also Figures 1 to 4 The utility model discloses a super martensitic stainless steel casting for a turbine compressor, comprising a volute casting 1, wherein one end of the volute casting 1 is provided with a placement groove 11, wherein an air outlet module casting 2 is provided in the placement groove 11, and the air outlet module casting 2 is detachably connected to the volute casting 1;

[0024] A plurality of guide grooves 111 are arranged on the inner wall surface of the storage groove 11, and fool-proof bumps 112 are arranged at local positions of the storage groove 11;

[0025] The outer surface of the air outlet module casting 2 is integrally provided with a guide convex strip 21 aligned with each guide slot, and the air outlet module casting 2 is provided with a positioning groove 22 aligned with the anti-fool convex block 112;

[0026] The air outlet module casting 2 is provided with a trumpet-shaped air outlet through hole 23;

[0027] A plurality of sealing rings are arranged between the air outlet module casting 2 and the object placement groove 11 , and a seal is formed between the outer surface of the air outlet module casting 2 and the inner wall surface of the object placement groove 11 via the sealing rings.

[0028] Preferably, two guide grooves 111 are arranged on the inner wall surface of the storage groove 11, and the guide grooves 111 are all rectangular grooves; the guide ridges 21 are all rectangular ridges, and each guide ridge 21 is inserted into the aligned guide grooves 111; the anti-foolproof protrusion 112 is a rectangular protrusion, and the positioning groove 22 is a rectangular groove. The size of the positioning groove matches the anti-foolproof protrusion 112. The anti-foolproof protrusion 112 is used to prevent the air outlet module casting 2 from being loaded upside down during assembly, so that the assembly operation is more convenient.

[0029] In order to make the structural design of the utility model more reasonable, as a preference, the volute casting 1 of the present embodiment is provided with a volute through hole 12 aligned with the trumpet-shaped air outlet through hole, and the volute through hole 12 is connected to the trumpet-shaped air outlet through hole 23 .

[0030] The volute through hole 12 is a circular through hole, and the trumpet-shaped air outlet through hole 23 is a conical through hole.

[0031] The air outlet module casting 2 is a rectangular structure, the placement groove 11 is a rectangular groove, and the size of the air outlet module casting 2 matches the size of the placement groove 11 .

[0032] The placement groove 11 is provided with a step surface 113, the outlet module casting 2 is integrally provided with a connection protrusion 24 at the groove opening of the placement groove 11, the connection protrusion 24 is provided with a plurality of bolt through holes 241, each bolt through hole 241 is provided with a fixing bolt 3, the step surface 113 is provided with a plurality of threaded blind holes 1131 corresponding to the positions of the bolt through holes, and the connection protrusion 24 is locked and fixed on the step surface 113 by the fixing bolts 3. Preferably, the number of the bolt through holes 241 is set to be 3 or more.

[0033] The volute casting 1 and the air outlet module casting 2 are both made of super martensitic stainless steel. The air outlet module casting 2 is provided with a sealing ring installation groove 25 at the groove mouth end away from the storage groove 11. The sealing ring includes an O-ring 4, and the O-ring 4 is installed in the sealing ring installation groove 25.

[0034] In actual application, the air outlet module casting and the volute casting can be cast separately, and the trumpet-shaped air outlet hole in the air outlet module casting can be processed separately. The tools used in the existing machining center can be used directly without the need to make special molding tools, which effectively reduces the processing cost and has good applicability. After the trumpet-shaped air outlet hole is processed, the air outlet module casting is assembled to the volute casting and fastened with bolts. The structural design is reasonable, and the air outlet module casting and the volute casting are easy to manufacture, which effectively reduces the processing difficulty and is conducive to large-scale processing and quality control. Large-scale processing is conducive to reducing manufacturing costs and has good practicality.

[0035] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above-mentioned utility model, which fall within the scope of protection of the present invention.

Claims

1. A super martensitic stainless steel casting for a turbine compressor, comprising a volute casting (1), characterized in that: A storage groove (11) is provided at one end of the volute casting (1), an air outlet module casting (2) is provided in the storage groove (11), and the air outlet module casting (2) is detachably connected to the volute casting (1); A plurality of guide grooves (111) are arranged on the inner wall surface of the storage groove (11), and a fool-proof protrusion (112) is arranged at a local position of the storage groove (11); The outer surface of the air outlet module casting (2) is integrally provided with a guide convex strip (21) aligned with the position of each guide slide groove, and the air outlet module casting (2) is provided with a positioning groove (22) aligned with the position of the foolproof convex block (112); A trumpet-shaped air outlet through hole (23) is provided in the air outlet module casting (2); A plurality of sealing rings are arranged between the air outlet module casting (2) and the object placement groove (11), and a seal is formed between the outer surface of the air outlet module casting (2) and the inner wall surface of the object placement groove (11) via the sealing rings.

2. The super martensitic stainless steel casting for a turbine compressor volute according to claim 1, characterized in that: The volute casting (1) is provided with a volute through hole (12) aligned with the trumpet-shaped air outlet through hole, and the volute through hole (12) is connected to the trumpet-shaped air outlet through hole (23).

3. The super martensitic stainless steel casting for a turbine compressor volute according to claim 2, characterized in that: The volute through hole (12) is a circular through hole, and the trumpet-shaped air outlet through hole (23) is a conical through hole.

4. The super martensitic stainless steel casting for a turbine compressor volute according to claim 3, characterized in that: The air outlet module casting (2) is a rectangular structure, the object placement groove (11) is a rectangular groove, and the size of the air outlet module casting (2) matches the size of the object placement groove (11).

5. The super martensitic stainless steel casting for a turbine compressor volute according to claim 4, characterized in that: A step surface (113) is provided in the placement groove (11); a connecting protrusion (24) is integrally provided on the air outlet module casting (2) at the groove mouth of the placement groove (11); a plurality of bolt through holes (241) are provided on the connecting protrusion (24); a fixing bolt (3) is provided in each bolt through hole (241); a plurality of threaded blind holes (1131) corresponding to the positions of the bolt through holes are provided on the step surface (113); and the connecting protrusion (24) is locked and fixed on the step surface (113) by the fixing bolt (3).

6. The super martensitic stainless steel casting for a turbine compressor volute according to claim 5, characterized in that: The volute casting (1) and the air outlet module casting (2) are both made of super martensitic stainless steel. The air outlet module casting (2) is provided with a sealing ring installation groove at the groove mouth end away from the storage groove (11). The sealing ring includes an O-type sealing ring (4), and the O-type sealing ring (4) is installed in the sealing ring installation groove.

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