Exhaust pipeline and silencing device
By setting up partition parts with specific shapes in the exhaust pipe of the screw compressor, the problem of the need to reserve a longer fluid mixing section after the fluid flows through the check valve is solved, and better exhaust sound silencing effect and structural simplification are achieved.
Patent Information
- Application Number
- CN202510616019.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2025-06-27
AI Technical Summary
The exhaust pipes of existing screw compressors need to reserve a longer fluid mixing section after the fluid flows through the check valve to reduce pressure loss, resulting in a complex structure and not compact structure, difficult and costly manufacturing.
A partition member with a specific shape is provided at the inlet of the exhaust gas silencer device behind the check valve, and its fluid passage structure is consistent with the fluid flow distribution area after the check valve, and the pressure loss caused by the fluid flowing through the check valve can be negligible.
Through this design, better exhaust noise silencing effect can be achieved in a limited space, while no obvious additional pressure loss, simplifying the pipeline structure and reducing manufacturing difficulty and cost.
Smart Images
Figure CN120212054A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to an exhaust pipe and a silencing device, and more particularly to an exhaust pipe applied to a screw compressor and a silencing device connected to the exhaust pipe. Background Art
[0002] An exhaust check valve is generally arranged on the exhaust flow channel of a screw compressor to prevent foreign objects from being sucked in and damaging the screw compressor when the unit stops. The exhaust check valve is usually arranged on the exhaust pipe near the exhaust port of the compressor or built into the compressor near the exhaust port. Summary of the Invention
[0003] According to a first aspect of the present application, there is provided an exhaust pipe including a pipe wall and a partition member. The pipe wall defines a pipe cavity, at least a part of the partition member is disposed in the pipe cavity, and the partition member is connected to the pipe wall; wherein, the exhaust pipe is disposed downstream of the check valve in terms of fluid flow, the partition member defines at least one fluid passage, and the shape of the at least one fluid passage coincides with the flow distribution of the fluid in the cross-section of the exhaust pipe after passing through the check valve.
[0004] According to a first aspect of the present application, the exhaust pipe is used to connect to a silencing device.
[0005] According to a first aspect of the present application, the partition member includes a base plate and at least one partition passage. The at least one partition passage penetrates through the base plate so that the at least one partition passage defines the at least one fluid passage.
[0006] According to a first aspect of the present application, the partition member is disposed perpendicular to the extending direction of the exhaust pipe.
[0007] According to a first aspect of the present application, the check valve is a double-flap check valve, the at least one partition passage is two partition passages, the at least one fluid passage is two fluid passages, and the exhaust pipe is disposed downstream of the double-flap check valve in terms of fluid flow. The partition member defines the two fluid passages, and the shapes of the two fluid passages coincide with the flow distribution of the fluid in the cross-section of the exhaust pipe after passing through the double-flap check valve.
[0008] According to a first aspect of the present application, the two partition passages are of a double crescent hole structure.
[0009] According to a first aspect of the present application, the two partition passages are of a double small semi-circular hole structure.
[0010] According to a first aspect of the present application, the two partition passages are of a double rectangular hole structure.
[0011] According to the first aspect of the present application, the two partition channels are a combined structure of a crescent-shaped hole and a rectangular hole.
[0012] According to the first aspect of the present application, the two partition channels are symmetrical hole structures.
[0013] According to the first aspect of the present application, the two partition channels of the partition member are asymmetrical hole structures.
[0014] According to the first aspect of the present application, the two partition channels defined by the partition member have different shapes.
[0015] According to the first aspect of the present application, the one-way valve is a single-flap one-way valve, the at least one partition channel is a single partition channel, the at least one fluid channel is a single fluid channel, and the center of the fluid cross-section of the single fluid channel does not coincide with the center of the fluid cross-section of the exhaust pipe.
[0016] According to the second aspect of the present application, a silencing device is provided, and the silencing device includes an inlet end, and the inlet end is the partition member of the exhaust pipe of the first aspect of the present application.
[0017] Other features, advantages, and embodiments of the present application can be elaborated or become apparent by considering the following detailed description, drawings, and claims. In addition, it should be understood that the above-mentioned summary of the invention and the following detailed description are both exemplary and are intended to provide further explanation without limiting the scope of the present application claimed. However, the detailed description and specific examples only indicate the preferred embodiments of the present application. For those skilled in the art, various changes and modifications within the spirit and scope of the present application will become apparent through this detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The features and advantages of the present application can be better understood by referring to the following detailed description in conjunction with the drawings. Throughout the drawings, the same reference numerals denote the same components, where:
[0019] Figure 1 is a schematic diagram of the exhaust pipe line of the unit with a compressor of the present application;
[0020] Figure 2 is Figure 1 a partial explosion view of the exhaust main pipe line of the shown unit;
[0021] Figure 3A is Figure 1 a side view of the exhaust main pipe line of the shown unit;
[0022] Figure 3B is Figure 3APartial sectional view of a part of the exhaust main pipeline of the shown unit along the cutting line A-A;
[0023] Figure 4 Front view of the first embodiment of the partition component of the present application;
[0024] Figure 5A is Figure 2 Front view of the second embodiment of the partition component in;
[0025] Figure 5B is Figure 2 Front view of the third embodiment of the partition component in;
[0026] Figure 5C is Figure 2 Front view of the fourth embodiment of the partition component in;
[0027] Figure 6A is Figure 2 Front view of the fifth embodiment of the partition component in;
[0028] Figure 6B is Figure 2 Front view of the sixth embodiment of the partition component in;
[0029] Figure 6C is Figure 2 Front view of the seventh embodiment of the partition component in;
[0030] Figure 7A is Figure 2 Front view of the eighth embodiment of the partition component in;
[0031] Figure 7B is Figure 2 Front view of the ninth embodiment of the partition component in;
[0032] Figure 8 Schematic diagram of the noise reduction effect of the noise reduction device connecting the exhaust pipeline of the present application. Detailed implementation manners
[0033] Various specific implementation manners of the present application will be described below with reference to the drawings that form a part of this specification. It should be understood that although directional terms such as "front", "rear", "upper", "lower", etc. are used in the present application to describe various exemplary structural parts and elements of the present application, these terms are used only for the convenience of description, and these terms are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present application can be arranged in different directions, these directional terms are used only for illustration and should not be regarded as limitations.
[0034] Figure 1This is a schematic diagram of the exhaust pipeline of the unit with a compressor in this application. To highlight and demonstrate the technical solution of this application, Figure 1 only a part of the exhaust pipeline of the unit is shown, and the structures unrelated to the technical solution of this application are omitted.
[0035] As Figure 1 shown, the unit 100 includes a compressor 102, an exhaust pipeline 106, an exhaust branch 108, a silencing device (see Figure 2 ), and an oil separator container (not shown in the figure). Among them, the compressor 102 includes an exhaust port 104, and the exhaust pipeline 106 is connected to the exhaust port 104; a check valve is provided at the exhaust port 104 (see Figure 2 ), which is used to prevent fluid from flowing back and being sucked into the compressor 102; the exhaust branch 108 is connected to the exhaust pipeline 106 and includes a first branch 112 and a second branch 114, and the first branch 112 and the second branch 114 are respectively connected to the oil separator container of the unit 100; the silencing device is installed inside the exhaust pipeline 106 or the exhaust branch 108. A partition member is provided in the exhaust pipeline 106 (see Figure 2 ), and in the flow direction of the fluid, the partition member is arranged between the check valve and the silencing device.
[0036] Figure 2 This is Figure 1 a partial explosion diagram of the main exhaust pipeline of the unit shown to illustrate the specific structures of the check valve and the partition member. Among them, Figure 2 the first branch 112 and the second branch 114 of the exhaust branch 108 are omitted in
[0037] order to better demonstrate the technical solution of this application. Figure 2 As shown, the exhaust port 104 of the compressor 102 can be seen, and the check valve 202 is built in at the exhaust port 104 of the compressor 102. In some other embodiments, the check valve 202 can also be arranged on the exhaust pipeline closest to the exhaust port 104 of the compressor. The check valve 202 can be a double-flap check valve or a single-flap check valve. The fluid discharged from the compressor 102 flows through the check valve 202 and enters the exhaust pipeline 106. In the embodiment of this application, the exhaust pipeline 106 includes a first section 204, a second section 208, and a partition member 206. The partition member 206 has a flat plate-like shape, and it is arranged between the first section 204 and the second section 208. The plate surface of the partition member 206 is perpendicular to the extension direction of the exhaust pipeline 106. As is known to those of ordinary skill in the art, the position where the partition member 206 is arranged is not limited to the position described in this embodiment. Generally speaking, the partition member 206 is arranged at the fluid outlet of the check valve 202.
[0038] Continuing as Figure 2As shown, the first section 204 is connected to the exhaust port 104, such that fluid can enter the first section 204 after flowing through the check valve 202; the silencing device 212 can be disposed downstream of the fluid in the second section 208 or arranged in the pipe cavity of the second section 208. The silencing device 212 includes an inlet end, and the partition member 206 can serve as the inlet end of the silencing device 212. The fluid F flows from the exhaust port 104 of the compressor 102 through the check valve 202, the first section 204 of the exhaust pipe 106, the partition member 206, the second section 208, and the silencing device 212 in sequence, and finally flows into the oil separator.
[0039] Figures 3A - 3B The internal structure of the exhaust pipe 106 is further shown. Figure 3A is Figure 1 a side view of the exhaust main pipeline of the shown unit. Figure 3B is Figure 3A a partial cross-sectional view of a part of the exhaust main pipeline of the shown unit along the cutting line A-A. Figure 3A and Figure 3B the main body structure of the compressor 102 and the first branch 112 and the second branch 114 of the exhaust branch 108 are omitted.
[0040] As Figures 3A - 3B shown, the exhaust pipe 106 includes a pipe wall 302, the pipe wall 302 defines a pipe cavity 304, at least a part of the partition member 206 of the exhaust pipe 106 is disposed in the pipe cavity 304 and forms part of the fluid passage. The partition member 206 is connected to the pipe wall 302, and the partition member 206 defines at least one fluid passage 312. In the embodiment of the present application, the at least one fluid passage 312 can be one fluid passage or two fluid passages, which is to adapt to the specific structure of the check valve 202. Specifically, when the check valve 202 is a single-flap check valve, the partition member 206 defines only a single fluid passage; when the check valve 202 is a double-flap check valve, the partition member 206 defines two fluid passages. In this way, the shape of the fluid passage of the partition member 206 is made to coincide with the flow distribution of the fluid in the cross-section of the exhaust pipe 106 after passing through the check valve 202, and the pressure loss generated by the fluid flowing through the fluid passage of the partition member 206 can be ignored. The pulsation is eliminated in the pipe cavity of the second section 208 that expands subsequently, and then flows to the oil separator. In fact, the second section 208 forms part of the silencing device 212, and the partition member 206 forms the inlet end of the silencing device 212.
[0041] Figure 4 This is a front view of the first embodiment of the partition member of the present application, showing the specific structure of the partition member 206.
[0042] As Figure 4As shown, when the one-way valve 202 is a double-flap one-way valve, the partition member 206 defines two fluid channels. Thus, the partition member 206 includes a substrate 404 and two partition channels 402. The two partition channels 402 penetrate through the substrate 404 such that the two partition channels 402 define two fluid channels (i.e., at least one fluid channel 312 described above). The two partition channels 402 have a double crescent-shaped hole structure, and the double crescent-shaped hole structures are symmetric about the center of the partition member 206. The double crescent-shaped hole structure of the two partition channels 402 is provided to adapt to the fluid distribution on the cross-section of the exhaust duct 106 after the fluid flows through the double-flap one-way valve, that is, after the fluid flows through the double-flap one-way valve, the fluid distribution on the cross-section of the exhaust duct 106 is also concentrated in a double crescent shape.
[0043] Figures 5A - 6C Other embodiments of the partition member are shown, which are used to adapt to double-flap one-way valves with different structures, where Figure 5A is Figure 2 the front view of the second embodiment of the partition member in Figure 5B is Figure 2 the front view of the third embodiment of the partition member in
[0044] Figure 5C is Figure 2 the front view of the fourth embodiment of the partition member in Figure 6A is Figure 2 the front view of the fifth embodiment of the partition member in Figure 6B is Figure 2 the front view of the sixth embodiment of the partition member in Figure 6C is Figure 2 the front view of the seventh embodiment of the partition member in
[0045] As Figure 5A shown, the two partition channels 512 of the partition member 502 are of a double small semi-circular hole structure; as Figure 5B shown, the two partition channels 514 of the partition member 504 are of a double rectangular hole structure; as Figure 5C shown, the two partition channels 516 of the partition member 506 are of a double trapezoid-like hole structure.
[0046] In Figures 5A - 5C the embodiment shown, the two partition channels of the partition member are of a symmetric hole structure, which is provided to adapt to the characteristics of the fluid distribution caused by the symmetrically arranged two flap leaves of the double-flap one-way valve. As those skilled in the art of the present application can understand, if the two flap leaves of the double-flap one-way valve are not symmetrically arranged, the characteristics of the fluid distribution caused by them are also asymmetric. Therefore, the shapes of the two partition channels of the partition member can be adaptively adjusted, that is, adjusted to an asymmetric hole structure, or further adjusted to two hole structures with different shapes, as described below Figures 6A - 6Cas introduced in
[0047] As Figure 6A shown, the two partition channels of the partition member 602 are a structure combined by a crescent-shaped hole 611 and a trapezoid-like hole 612; as Figure 6B shown, the two partition channels of the partition member 604 are a structure combined by a crescent-shaped hole 611 and a rectangular hole 614; as Figure 6C shown, the two partition channels of the partition member 606 are a structure combined by a trapezoid-like hole 612 and a semi-circular-like hole 616.
[0048] Figures 7A - 7B shows two structures of the partition member when the one-way valve is a single-flap one-way valve, where Figure 7A is Figure 2 the front view of the eighth embodiment of the partition member in Figure 7B is Figure 2 the front view of the ninth embodiment of the partition member in
[0049] As Figures 7A - 7B shown, the partition member 702 includes a substrate 704 and a single partition channel 712 or 714, and the single partition channel 712 or 714 defines a single fluid channel, and the center A1 or A2 of the fluid cross-section of the single fluid channel does not coincide with the center O of the fluid cross-section of the exhaust pipe. Those skilled in the art should understand that Figures 7A - 7B the two structures of the single partition channel shown are to adapt to the characteristics of the fluid distribution caused by the single flap of different single-flap one-way valves.
[0050] As is known to those skilled in the art, one-way valves with different structures will cause different fluid distribution characteristics on the cross-section of the exhaust pipe. Therefore, the partition channels of the partition member are not limited to Figures 5A - 7B the shapes shown, and it can be any shape that matches the fluid distribution flowing through the one-way valve.
[0051] Figure 8 is a schematic diagram of the noise reduction effect of the noise reduction device connected to the exhaust pipe of this application.
[0052] As Figure 8 shown, by arranging a partition member that adapts to the fluid distribution flowing through the one-way valve in the exhaust pipe before the noise reduction device, the noise reduction device can be directly connected, and the fluid pressure loss flowing through this partition can be ignored. Figure 8 The dotted line in represents the noise reduction curve of the T-shaped exhaust pipe in the prior art, and the solid line represents the noise reduction curve of the T-shaped exhaust pipe of this application. It can be seen that almost in the full frequency range, the noise reduction curve of this application is significantly higher than the existing noise reduction curve. That is, by arranging the partition member of this application in the exhaust pipe, compared with the current technology, a better noise reduction structure can be arranged in a limited space to achieve a better noise reduction effect, and there is no obvious additional pressure loss.
[0053] The inventors of the present application have found through research that in the existing exhaust flow path of the unit, in order to control the pressure loss, after the fluid flows through the one-way valve, a relatively long fluid mixing section needs to be reserved before the traditional exhaust silencing device can be arranged. This results in a relatively complex, non-compact structure of the entire exhaust pipeline, with high manufacturing difficulty and cost. If the pipeline structure is to be simplified, a T-shaped exhaust pipe can only be provided on the compressor and its unit, but this setting makes the silencing frequency band of the silencing device relatively narrow and only suitable for fixed-frequency operation. Therefore, an exhaust pipe is needed that does not require a relatively long fluid mixing section to be reserved after the fluid flows through the one-way valve to reduce the pressure loss.
[0054] The inventors of the present application have provided the partition member described herein at the entrance of the exhaust silencing device after the one-way valve. It has a partition channel structure with a specific shape that coincides with the fluid flow distribution area after passing through the one-way valve. The pressure loss generated by the fluid flowing through this partition channel can be ignored. This partition serves as the inlet end plate of the exhaust silencer, and the axial length in the subsequent silencing chamber can assist in completing the mixing flow, so that better exhaust silencing can be achieved within a limited space, while the additional pressure loss generated is very small. Therefore, the exhaust pipe in the present application can achieve the following beneficial technical effects: simple and compact structure, easy to manufacture, better silencing effect, and can meet the silencing requirements of both fixed-frequency and broadband variable-frequency applications at the same time.
[0055] Although the present application has been described in connection with the examples of the embodiments outlined above, various alternative solutions, modifications, variations, improvements, and / or substantially equivalent solutions, whether known or now or soon foreseeable, may be obvious to those of at least ordinary skill in the art. Additionally, the technical effects and / or technical problems described in this specification are exemplary rather than restrictive; so the disclosures in this specification may be used to solve other technical problems and have other technical effects and / or may solve other technical problems. Therefore, the examples of the embodiments of the present application as stated above are intended to be illustrative rather than restrictive. Various changes can be made without departing from the spirit or scope of the present application. Therefore, the present application is intended to include all known or earlier developed alternative solutions, modifications, variations, improvements, and / or substantially equivalent solutions.
Claims
1. An exhaust duct (106), characterized in that include: a conduit wall (302), the conduit wall (302) defining a conduit cavity (304); and a partition member (206), at least a portion of which is disposed in the pipeline cavity (304), and the partition member (206) is connected to the pipeline wall (302); The exhaust pipe (106) is arranged downstream of the fluid of the one-way valve (202), and the partition component (206) defines at least one fluid channel (312), and the shape of the at least one fluid channel (312) is consistent with the flow distribution of the fluid in the cross section of the exhaust pipe (106) after passing through the one-way valve (202).
2. The exhaust duct according to claim 1, characterized in that: The exhaust pipe (106) is used to connect to a silencer (212).
3. The exhaust duct according to claim 1, characterized in that: The separator component (206) includes a base plate (404) and at least one separator channel (402), wherein the at least one separator channel (402) is disposed through the base plate (404) such that the at least one separator channel (402) defines the at least one fluid channel (312).
4. The exhaust duct according to claim 1, characterized in that: The partition component (206) is arranged perpendicular to the extension direction of the exhaust pipe (106).
5. The exhaust duct according to claim 3, characterized in that: The one-way valve (202) is a double-flap one-way valve, the at least one partition channel (402) is two partition channels, the at least one fluid channel (312) is two fluid channels, and The exhaust pipe (106) is arranged downstream of the fluid of the double-flap one-way valve, and the partition component (206) defines the two fluid channels, and the shapes of the two fluid channels are consistent with the flow distribution of the fluid in the cross section of the exhaust pipe (106) after passing through the double-flap one-way valve.
6. The exhaust duct according to claim 5, characterized in that: The two partition channel are double crescent-shaped hole structures.
7. The exhaust duct according to claim 5, characterized in that: The two partition channel are double small semicircular hole structures.
8. The exhaust duct according to claim 5, characterized in that: The two partition channel are double rectangular hole structures.
9. The exhaust duct according to claim 5, characterized in that: The two partition channel structures are a combination of a crescent-shaped hole and a rectangular hole.
10. The exhaust duct according to claim 5, characterized in that: The two partition channel are symmetrical hole structures.
11. The exhaust duct according to claim 5, characterized in that: The two partition channels of the partition component are asymmetric hole structures.
12. The exhaust duct according to claim 11, characterized in that: The two partition passages defined by the partition member have different shapes.
13. The exhaust duct according to claim 1, characterized in that: The one-way valve is a single-flap one-way valve, the at least one baffle channel is a single baffle channel, the at least one fluid channel is a single fluid channel, and the center of the fluid cross section of the single fluid channel does not coincide with the center of the fluid cross section of the exhaust pipe.
14. A muffler (212), characterized in that: The muffler device (212) includes an inlet end, which is the baffle member (206) of the exhaust duct (106) according to any one of claims 1 to 13.