Gas compressor shell, gas compressor and vehicle

Abstract

The utility model discloses a compressor casing, compressor and vehicle, compressor casing includes casing main part and volute, casing main part has waste gas channel and mixing channel, waste gas channel and mixing channel are communicated, volute and casing main part are connected, mixing channel and volute are communicated, volute is suitable for installing pinch roller, and the pinch roller is suitable for installing the pinch roller. The distance between the center line of the waste gas channel and the end face of the side, extending into the shell body, of the pressing wheel in the extending direction of the mixing channel is L1, L1 = (1-1.5) D1, and D1 is the diameter of the pressing wheel. According to the gas compressor shell, the risk that condensate water is generated in front of a pressing wheel can be reduced in a low-temperature environment, and the using stability of a gas compressor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressors, and in particular relates to an air compressor casing, an air compressor and a vehicle. Background Art

[0002] In order to further reduce fuel consumption and reduce automobile emissions, low-pressure EGR technology is mostly used in automobile engines. Low-pressure EGR technology can reduce the combustion temperature in the cylinder and suppress knock by introducing the exhaust gas circulation to the front of the compressor and then driving the combustion in the cylinder.

[0003] The EGR mixing passage in the related technology adopts a separate nylon tube, and the air passage and the EGR passage are mixed in the nylon tube. However, this solution will not only increase the volume of the front end structure of the compressor, but also due to the different materials of the nylon tube and the compressor casing, there is a difference in thermal conductivity, which will cause condensation and even ice in the nylon tube, thereby affecting the normal operation of the compressor and increasing the wear on the compression wheel. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a compressor housing, which can reduce the risk of condensation water generated before the compressor wheel in a low temperature environment and improve the stability of the compressor.

[0005] The embodiment of the utility model also provides a compressor.

[0006] An embodiment of the utility model also provides a vehicle.

[0007] The compressor casing of the embodiment of the utility model comprises: a casing body, the casing body having an exhaust gas passage and a mixing passage, the exhaust gas passage being connected to the mixing passage; a volute, the volute being connected to the casing body, the mixing passage being connected to the volute, the volute being suitable for installing a pressure wheel, the distance between the center line of the exhaust gas passage and the end face of one side of the pressure wheel extending into the interior of the casing body in the extension direction of the mixing passage is L1, and L1=(1-1.5)D1, wherein D1 is the diameter of the pressure wheel.

[0008] The compressor casing of the embodiment of the utility model ensures uniform mixing between the exhaust gas and the air by controlling the distance between the center line of the exhaust gas channel and the end face of one side of the casing body adjacent to the compression wheel, and reduces the risk of condensation and ice formation due to the excessively long mixing path between the exhaust gas and the air. Thus, in a low temperature environment, the risk of condensation or ice formation in front of the compression wheel can be reduced, thereby improving the stability of the entire compressor.

[0009] In some embodiments, a preset angle β is formed between a center line of the exhaust passage and a center line of the mixing passage, and 60°≤β≤90°.

[0010] In some embodiments, the inner diameter of the exhaust passage is D2, and 0.4D1≤D2≤0.6D1.

[0011] In some embodiments, the housing body further has a dirty air passage therein, the dirty air passage is in communication with the mixing passage, and the dirty air passage is arranged closer to the pressure wheel than the exhaust gas passage.

[0012] In some embodiments, the distance between the center line of the dirty air channel and the end surface of one side of the pressure wheel extending into the interior of the shell body in the extending direction of the mixing channel is L2, and L2=(0.3-0.6)D1.

[0013] In some embodiments, the inner diameter of the dirty air channel is D3, and 0.25D1≤D3≤0.3D1.

[0014] In some embodiments, the compressor casing further comprises a joint, wherein the joint is connected to the casing body, and one end of the joint extends into the dirty air passage.

[0015] In some embodiments, the volute and the shell body are an integrally formed structure.

[0016] The compressor of the embodiment of the utility model comprises: a casing, which is the compressor casing described in any one of the above embodiments; and a pressure wheel, which is connected to the volute.

[0017] The vehicle of the embodiment of the utility model comprises the compressor as described in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a compressor casing according to an embodiment of the utility model.

[0019] Figure 2 It is a cross-sectional view of a compressor according to an embodiment of the utility model.

[0020] Figure 3 It is a cross-sectional view of the compressor at another angle of the embodiment of the utility model.

[0021] Reference numerals:

[0022] Shell body 1, mixing channel 11, mixing channel inlet 111, mixing channel outlet 112, exhaust gas channel 2, joint 3, volute 4, volute 41, air outlet 5, pressure wheel 6, dirty air channel 7. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0024] The compressor casing of the embodiment of the utility model includes a casing body 1 and a volute 4, the casing body 1 has an exhaust gas channel 2 and a mixing channel 11, the exhaust gas channel 2 is connected to the mixing channel 11, the volute 4 is connected to the casing body 1, the mixing channel 11 is connected to the volute 4, the volute 4 is suitable for installing a pressure wheel 6, the distance between the center line of the exhaust gas channel 2 and the end face of one side of the pressure wheel 6 extending into the interior of the casing body 1 in the extension direction of the mixing channel 11 is L1, and L1=(1-1.5)D1, wherein D1 is the diameter of the pressure wheel 6.

[0025] Specifically, Figure 1 and Figure 2 As shown, the mixing channel 11 has a mixing channel inlet 111 and a mixing channel outlet 112, and the outside fresh air can enter the mixing channel 11 through the mixing channel inlet 111. The volute 4 is installed at the mixing channel outlet 112, and the volute 4 has a volute 41, and the inlet of the volute 41 is connected with the mixing channel outlet 112. The shell body 1 is provided with an air outlet 5, and the air outlet 5 is connected with the outlet of the volute 41, that is, fresh air enters the mixing channel 11 through the mixing channel inlet 111 and mixes with the exhaust gas in the mixing channel 11. The mixed gas enters the volute 41 after being pressurized by the compression wheel 6, and is finally discharged through the air outlet 5.

[0026] For example, when the exhaust gas channel 2 is a circular channel, the center line of the exhaust gas channel 2 is the axis of the exhaust gas channel 2 .

[0027] When the mixing channel 11 is a circular channel, the center line of the mixing channel 11 is the axis of the mixing channel 11 .

[0028] The distance between the center line of the exhaust gas channel 2 and the left end face of the pressure wheel 6 in the left and right directions is L1, and L1 can be the same as the diameter of the pressure wheel 6, or L1=1.2D1 or L1=1.35D1 or L1=1.5D1. It should be noted that when the distance L1 is too large, condensation water or even ice is likely to form in the mixing channel 11, but when the distance L1 is too small, it is easy to cause uneven mixing between fresh air and exhaust gas, affecting the performance of the engine.

[0029] The compressor casing of the embodiment of the utility model ensures uniform mixing between the exhaust gas and the air by controlling the distance between the center line of the exhaust gas channel 2 and the end face of one side of the compression wheel 6 extending into the interior of the shell body 1, and reduces the risk of condensation and ice formation due to the excessively long mixing path between the exhaust gas and the air. Therefore, in a low temperature environment, the risk of condensation or ice formation in front of the compression wheel 6 can be reduced, thereby improving the stability of the entire compressor.

[0030] In some embodiments, a preset angle β is formed between the center line of the exhaust passage 2 and the center line of the mixing passage 11 , and 60°≤β≤90°.

[0031] For example, the preset angle β between the center line of the exhaust channel 2 and the center line of the mixing channel 11 may be 60°, 65°, 68°, 70°, 75°, 80°, 85° and 90°. It should be noted that when the preset angle β between the center line of the exhaust channel 2 and the center line of the mixing channel 11 is too large, the outlet of the exhaust channel 2 will be toward the mixing channel inlet 111, which not only affects the entry of fresh air, but also causes exhaust gas leakage. On the contrary, when the preset angle β between the center line of the exhaust channel 2 and the center line of the mixing channel 11 is too small, the exhaust gas will propagate along the inner wall of the mixing channel 11, affecting the mixing of the exhaust gas and the fresh air, and affecting the EGR performance of the entire engine.

[0032] In some embodiments, the inner diameter of the exhaust passage 2 is D2, and 0.4D1≤D2≤0.6D1.

[0033] For example, the inner diameter of the exhaust gas channel 2 can be 0.4D1 or 0.45D1 or 0.5D1 or 0.6D1. It should be noted that when the inner diameter of the exhaust gas channel 2 is too small, the exhaust gas intake amount is small, which affects the engine EGR performance. On the contrary, when the inner diameter of the exhaust gas channel 2 is too large, in order to ensure uniform mixing between the exhaust gas and the fresh air, it is necessary to expand the size of the mixing channel inlet 111, increase the size of the entire shell body 1, and cause the vehicle front cabin space to be compressed, which is relatively difficult to arrange for a compact front cabin.

[0034] In some embodiments, the housing body 1 further has a dirty air passage 7 therein, the dirty air passage 7 is communicated with the mixing passage 11 , and the dirty air passage 7 is arranged closer to the pressure wheel 6 than the exhaust passage 2 .

[0035] It should be noted that dirty air refers to a mixture of air, leaked oil and engine oil, which may generate condensation or even ice at low temperatures. By arranging the dirty air passage 7 relative to the exhaust passage 2 near the compression wheel 6, the risk of condensation or even ice of the dirty air may be reduced through the conduction and radiation of heat between the pressurized air and the high-temperature volute 4.

[0036] In some embodiments, the distance between the center line of the dirty air passage 7 and the end surface of one side of the pressure wheel 6 adjacent to the shell body 1 in the extending direction of the mixing passage 11 is L2, and L2=(0.3-0.6)D1.

[0037] Specifically, Figure 3 As shown, the distance between the center line of the dirty air channel 7 and the left end face of the pressure wheel 6 in the left and right directions is L2, and L2=0.3D1 or L2=0.4D1 or L2=0.5D1 or L2=0.6D1. It should be noted that when the distance L2 is too large, the distance between the dirty air and the volute 4 increases, resulting in the heat of the volute 4 and the pressurized air being unable to cover the dirty air channel 7, causing the dirty air to produce condensed water or even ice in the mixing channel 11. However, when the distance L2 is too small, it is easy to cause uneven mixing between the fresh air and the dirty air, affecting the performance of the engine.

[0038] In some embodiments, the inner diameter of the dirty air passage 7 is D3, and 0.25D1≤D3≤0.3D1.

[0039] For example, the inner diameter of the dirty air channel 7 can be 0.25D1 or 0.26D1 or 0.27D1 or 0.28D1 or 0.3D1. It should be noted that when the inner diameter of the dirty air channel 7 is too small, the intake amount of dirty air is small, which affects the performance of the engine EGR. On the contrary, when the inner diameter of the dirty air channel 7 is too large, in order to ensure uniform mixing between the dirty air and the fresh air, it is necessary to expand the size of the mixing channel inlet 111, increase the size of the entire shell body 1, and cause the space in the front cabin of the vehicle to be compressed, which makes it relatively difficult to arrange the compact front cabin.

[0040] In some embodiments, the compressor casing further includes a joint 3 , which is connected to the casing body 1 , and one end of the joint 3 extends into the dirty air passage 7 .

[0041] It should be noted that the joint 3 may be a steel joint 3 , and there is an interference fit between the joint 3 and the shell body 1 . The joint 3 is provided to facilitate connection with a source of dirty air.

[0042] In some embodiments, the volute 4 and the shell body 1 are an integrally formed structure. For example, the volute 4 and the shell body 1 are integrally cast, and the volute 4 and the shell body 1 can be made of aluminum. The volute 4 and the shell body 1 are integrally formed to improve the structural strength and sealing performance of the entire compressor housing.

[0043] The compressor of the embodiment of the utility model comprises: a casing and a pressure wheel 6 , wherein the casing is the casing of the compressor of any one of the above-mentioned embodiments, and the pressure wheel 6 is connected to the volute 4 .

[0044] Specifically, Figure 2 and Figure 3As shown, the pressure wheel 6 is connected to the volute 4, and the pressure wheel 6 is located inside the volute 4. The pressure wheel 6 is rotatable relative to the volute 4. The mixed gas can be pressurized by arranging the pressure wheel 6.

[0045] The vehicle according to the embodiment of the utility model comprises the compressor according to the above embodiment.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A compressor casing, characterized in that: include: a shell body, the shell body having an exhaust gas passage and a mixing passage, the exhaust gas passage being in communication with the mixing passage; The volute is connected to the shell body, the mixing passage is connected to the volute, the volute is suitable for installing a pressure wheel, the distance between the center line of the exhaust gas passage and the end face of one side of the pressure wheel extending into the shell body in the extension direction of the mixing passage is L1, and L1 = (1-1.5) D1, where D1 is the diameter of the pressure wheel.

2. The compressor casing according to claim 1, characterized in that: There is a preset angle β between the center line of the exhaust gas channel and the center line of the mixing channel, and 60°≤β≤90°.

3. The compressor casing according to claim 1, characterized in that: The inner diameter of the exhaust gas channel is D2, and 0.4D1≤D2≤0.6D1.

4. The compressor casing according to claim 1, characterized in that: The housing body further has a dirty air passage therein, the dirty air passage being in communication with the mixing passage, and the dirty air passage being arranged closer to the pressure wheel than the exhaust gas passage.

5. The compressor casing according to claim 4, characterized in that: The distance between the center line of the dirty air passage and the end surface of one side of the pressure wheel extending into the interior of the shell body in the extending direction of the mixing passage is L2, and L2=(0.3-0.6)D1.

6. The compressor casing according to claim 4, characterized in that: The inner diameter of the dirty air passage is D3, and 0.25D1≤D3≤0.3D1.

7. The compressor casing according to claim 4, characterized in that: The utility model also comprises a joint, which is connected to the shell body, and one end of the joint extends into the dirty air passage.

8. The compressor casing according to claim 1, characterized in that: The volute and the shell body are an integrally formed structure.

9. A compressor, characterized in that: include: A casing, wherein the casing is a compressor casing according to any one of claims 1 to 8; A pressure wheel is connected to the volute.

10. A vehicle, characterized in that: Comprising a compressor as claimed in claim 9.

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