Shell compression device with single flow slot

Abstract

The utility model relates to a compressor shell device with a single flow groove, wherein a flow guide muffler is fixed inside the compressor shell jacket, and the compressor shell jacket, the compressor shell connecting ring, the compressor shell inner sleeve and the flow guide muffler form a cavity; a widened flow groove is formed between the upper end of the compressor shell inner sleeve and the lower end of the flow guide muffler; or, the upper end of the compressor shell inner sleeve is in sealed contact with the lower end of the flow guide muffler, and a widened flow groove is provided on the compressor shell inner sleeve; or, the upper end of the compressor shell inner sleeve is in sealed contact with the lower end of the flow guide muffler, and a widened flow groove is provided on the flow guide muffler; in the direction from top to bottom, the widened flow groove is in a contracted shape; the compressor inlet is connected to the cavity only through the widened flow groove. When the utility model is working, the working fluid no longer returns to the compressor inlet to cause turbulence to the intake, and the compressor surge flow range can be widened while improving the compressor efficiency; the flow guide muffler can bring a better compressor intake rectification effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of turbocharger compressors and specifically discloses a compression shell device with a single flow slot. Background Art

[0002] As the competition for internal combustion engine economic indicators becomes increasingly fierce, turbocharged engines with greater surge margin and low- and medium-speed operating efficiency under the same conditions will undoubtedly be more competitive, which means that the turbocharger compressor itself is required to have better surge margin and efficiency level.

[0003] There are many forms of compressor widening flow structures for superchargers on the market. The main purpose is to widen the Map surge flow range of the supercharger compressor. The working mechanism is that the airflow separated by the compressor in the unstable working area of ​​the compressor with low flow and high pressure ratio is returned to the compressor inlet through the widened flow slot, so that the final working state of the compressor is stabilized at a position with the same pressure ratio and lower flow rate. However, the overall efficiency of the compressor will also decrease after the widened flow slot is used. Summary of the invention

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a shell compression device with a single flow slot which can reduce efficiency loss.

[0005] According to the technical solution provided by the utility model, the compression shell device with a single flow slot includes a compression shell and a flow guide and silencer cover;

[0006] The compression shell comprises a compression shell outer shell, a compression shell flow channel, a compression shell connecting ring and a compression shell inner shell. The compression shell flow channel is integrally fixed on the outer circle of the lower end of the compression shell outer shell, the compression shell connecting ring is integrally fixed on the inner circle of the lower end of the compression shell outer shell, and the compression shell inner shell is integrally fixed on the inner edge of the upper end surface of the compression shell connecting ring.

[0007] The guide muffler is fixed inside the compressor casing outer sleeve and is located above the compressor casing inner sleeve. The inner circle inner side of the compressor casing inner sleeve cooperates with the inner circle inner side of the guide muffler to form a compressor inlet. The compressor casing outer sleeve, the compressor casing connecting ring, the compressor casing inner sleeve and the guide muffler form a cavity.

[0008] An annular widened flow groove is formed between the upper end of the compressor shell inner sleeve and the lower end of the flow guide muffler; or, the upper end of the compressor shell inner sleeve is in sealing contact with the lower end of the flow guide muffler, and an annular widened flow groove is provided on the compressor shell inner sleeve; or, the upper end of the compressor shell inner sleeve is in sealing contact with the lower end of the flow guide muffler, and an annular widened flow groove is provided on the flow guide muffler;

[0009] In the direction from top to bottom, the widened flow slot is in a convergent shape;

[0010] The compressor inlet is connected to the cavity only by widening the flow slot.

[0011] Preferably, the flow guide silencer cover is fixed inside the compression shell jacket by interference fitting.

[0012] Preferably, the flow guide silencer cover is fixed to the inside of the compression shell jacket by fastening bolts or pins.

[0013] When the utility model is working, the working fluid no longer returns to the compressor inlet to cause turbulence to the intake air, which can improve the compressor efficiency and also broaden the compressor surge flow range; at the same time, the silencer can bring about a better compressor intake rectification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of embodiment 1 of the utility model.

[0015] Figure 2 It is a structural schematic diagram of embodiment 2 of the present utility model. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with specific embodiments.

[0017] Example 1

[0018] A shell compression device with a single flow slot, such as Figure 1 As shown, it includes a compression shell 1 and a flow guide and silencer cover 2;

[0019] The compressor shell 1 comprises a compressor shell outer shell 1.1, a compressor shell flow channel 1.2, a compressor shell connecting ring 1.3 and a compressor shell inner shell 1.4. The compressor shell flow channel 1.2 is integrally fixed on the outer circle of the lower end of the compressor shell outer shell 1.1, the compressor shell connecting ring 1.3 is integrally fixed on the inner circle of the lower end of the compressor shell outer shell 1.1, and the compressor shell inner shell 1.4 is integrally fixed on the inner edge of the upper end surface of the compressor shell connecting ring 1.3.

[0020] The deflector silencer 2 is fixed inside the compressor casing outer sleeve 1.1 by interference fit and the deflector silencer 2 is located above the compressor casing inner sleeve 1.4. The inner circle inner side of the compressor casing inner sleeve 1.4 cooperates with the inner circle inner side of the deflector silencer 2 to form a compressor inlet 3. The compressor casing outer sleeve 1.1, the compressor casing connecting ring 1.3, the compressor casing inner sleeve 1.4 and the deflector silencer 2 form a cavity 4.

[0021] An annular widened flow groove 5 is formed between the upper end of the compression shell inner sleeve 1.4 and the lower end of the flow guide muffler 2. In the direction from top to bottom, the widened flow groove 5 is in a contracted shape;

[0022] The compressor inlet 3 is connected to the cavity 4 only by widening the flow slot 5 .

[0023] Example 2

[0024] A shell compression device with a single flow slot, such as Figure 2 As shown, it includes a compression shell 1 and a flow guide and silencer cover 2;

[0025] The compressor shell 1 comprises a compressor shell outer shell 1.1, a compressor shell flow channel 1.2, a compressor shell connecting ring 1.3 and a compressor shell inner shell 1.4. The compressor shell flow channel 1.2 is integrally fixed on the outer circle of the lower end of the compressor shell outer shell 1.1, the compressor shell connecting ring 1.3 is integrally fixed on the inner circle of the lower end of the compressor shell outer shell 1.1, and the compressor shell inner shell 1.4 is integrally fixed on the inner edge of the upper end surface of the compressor shell connecting ring 1.3.

[0026] The deflector silencer 2 is fixed to the inside of the compressor casing outer sleeve 1.1 by fastening bolts or pins and the deflector silencer 2 is located above the compressor casing inner sleeve 1.4. The inner circle inner side of the compressor casing inner sleeve 1.4 cooperates with the inner circle inner side of the deflector silencer 2 to form a compressor inlet 3. The compressor casing outer sleeve 1.1, the compressor casing connecting ring 1.3, the compressor casing inner sleeve 1.4 and the deflector silencer 2 form a cavity 4.

[0027] The upper end of the compression shell inner sleeve 1.4 is in sealing contact with the lower end of the guide muffler 2, and an annular widened flow groove 5 is provided on the compression shell inner sleeve 1.4; in the direction from top to bottom, the widened flow groove 5 is in a contracted shape;

[0028] The compressor inlet 3 is connected to the cavity 4 only by widening the flow slot 5 .

[0029] The working principles of Example 1 and Example 2 are as follows:

[0030] The working fluid returned from the high-pressure area of ​​the compressor wheel enters the cavity 4 through the compressor inlet 3 and the widened flow groove 5. The working fluid no longer returns to the compressor inlet 3 to cause turbulence to the intake air, which can improve the compressor efficiency and also widen the compressor surge flow range. At the same time, the gas in the cavity 4 flows back to the compressor inlet 3 (i.e., the low-pressure area of ​​the compressor wheel) through the widened flow groove 5.

Claims

1. A compression shell device with a single flow slot, comprising a compression shell (1) and a flow guide and silencer cover (2); The compression shell (1) comprises a compression shell outer shell (1.1), a compression shell flow channel (1.2), a compression shell connecting ring (1.3) and a compression shell inner shell (1.4); the compression shell flow channel (1.2) is integrally fixed on the outer circle of the lower end of the compression shell outer shell (1.1); the compression shell connecting ring (1.3) is integrally fixed on the inner circle of the lower end of the compression shell outer shell (1.1); and the compression shell inner shell (1.4) is integrally fixed on the inner edge of the upper end surface of the compression shell connecting ring (1.3); The guide silencer (2) is fixed inside the compressor casing outer sleeve (1.1) and is located above the compressor casing inner sleeve (1.4); the inner side of the inner circle of the compressor casing inner sleeve (1.4) cooperates with the inner side of the inner circle of the guide silencer (2) to form a compressor inlet (3); the compressor casing outer sleeve (1.1), the compressor casing connecting ring (1.3), the compressor casing inner sleeve (1.4) and the guide silencer (2) form a cavity (4); Its characteristics are: An annular widened flow groove (5) is formed between the upper end of the compression shell inner sleeve (1.4) and the lower end of the flow guide muffler (2); or, the upper end of the compression shell inner sleeve (1.4) is in sealing contact with the lower end of the flow guide muffler (2), and an annular widened flow groove (5) is provided on the compression shell inner sleeve (1.4); or, the upper end of the compression shell inner sleeve (1.4) is in sealing contact with the lower end of the flow guide muffler (2), and an annular widened flow groove (5) is provided on the flow guide muffler (2); In the direction from top to bottom, the flow slot (5) is widened to be in a contracted shape; The compressor inlet (3) is connected to the cavity (4) only by widening the flow slot (5).

2. The shell compression device with a single flow slot according to claim 1, characterized in that: The flow guide silencer cover (2) is fixed inside the compression shell jacket (1.1) by interference fit.

3. The shell compression device with a single flow slot according to claim 1, characterized in that: The flow guide silencer cover (2) is fixed to the interior of the compression shell outer sleeve (1.1) by means of fastening bolts or pins.

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