Exhaust bearing seat and compressor
By setting at least two exhaust chambers on the exhaust bearing seat, the problem of large pressure loss during the gas discharge process in the compressor is solved, and the effect of improving the energy efficiency of the compressor and reducing noise is achieved.
Patent Information
- Application Number
- CN202421330833.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-11
AI Technical Summary
In existing compressors, there is a large pressure loss during the discharge of gas through the exhaust bearing seat, which affects the energy efficiency of the compressor.
At least two exhaust chambers are provided on the exhaust bearing seat, so that gas flows through multiple exhaust chambers and then gathers in the exhaust ports, thereby expanding the exhaust space and reducing pressure loss.
By increasing the number of exhaust chambers, the pressure loss when gas flows through the exhaust bearing seat is reduced, the energy efficiency of the compressor is improved, and the aerodynamic noise is reduced.
Smart Images
Figure CN222502007U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of compression equipment, and in particular to an exhaust bearing seat and a compressor. Background Art
[0002] During the operation of the compressor, the gas compressed by the rotor is usually discharged to the outside of the compressor through the exhaust bearing seat located at the end of the rotor.
[0003] In the related art, when the gas is discharged through the exhaust bearing seat, the pressure loss is relatively large, which affects the energy efficiency of the compressor. Utility Model Content
[0004] A technical problem to be solved by the present application is to reduce the pressure loss of gas during the discharge process through the exhaust bearing seat.
[0005] In order to solve the above technical problems, the present application provides an exhaust bearing seat, which includes:
[0006] seat body;
[0007] An exhaust port is provided on the seat body and is used to communicate with the compression chamber of the compressor;
[0008] An exhaust port, disposed on the base body, for communicating with the external environment; and
[0009] At least two exhaust chambers are arranged in the base body, and the inlets of at least two exhaust chambers are connected to the exhaust port in parallel, and the outlets of at least two exhaust chambers are connected to the exhaust port, so that the gas compressed by the rotor of the compressor in the compression chamber flows through the exhaust port through the at least two exhaust chambers and then converges to the exhaust port for discharge.
[0010] In some embodiments, at least two of the at least two exhaust cavities have different volumes.
[0011] In some embodiments, the at least two exhaust chambers include a first chamber and a second chamber, and a volume ratio of the first chamber to the second chamber is 2-4.
[0012] In some embodiments, the volume ratio of the first cavity to the second cavity is 2.5-3.5.
[0013] In some embodiments, the volume ratio of the first cavity to the second cavity is 3.
[0014] In some embodiments, the first cavity and the second cavity are located on opposite sides of the exhaust aperture.
[0015] In some embodiments, at least two flow channels are disposed on the seat body, and the at least two flow channels correspond to the at least two exhaust cavities one by one to connect the inlets of the at least two exhaust cavities with the exhaust orifices.
[0016] In some embodiments, two positioning holes are provided on the seat body, the two positioning holes are used for the rotor of the compressor to pass through, and at least two flow channels are located between the two positioning holes.
[0017] In addition, the present application also provides a compressor, which includes the exhaust bearing seat of any embodiment.
[0018] In some embodiments, the compressor is a twin-screw compressor.
[0019] By arranging at least two exhaust cavities on the exhaust bearing seat, the number of exhaust cavities on the exhaust bearing seat is increased from one to at least two, which can reduce the pressure loss of compressed gas when flowing through the exhaust bearing seat and improve the energy efficiency of the compressor.
[0020] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 It is a first cross-sectional schematic diagram of the exhaust bearing seat in the embodiment of the present application.
[0023] Figure 2 This is a second cross-sectional schematic diagram of the exhaust bearing seat in the embodiment of the present application.
[0024] Description of reference numerals:
[0025] 1. Base body;
[0026] 2. Exhaust hole;
[0027] 3. Exhaust chamber; 31. First chamber; 32. Second chamber;
[0028] 4. Exhaust port;
[0029] 5. Positioning hole;
[0030] 6. flow channel; 61. first flow channel; 62. second flow channel. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of this application.
[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.
[0033] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0034] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.
[0035] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0036] The exhaust bearing seat is an important component of the compressor. It is usually arranged on the compressor casing and located at the end of the compressor rotor. It not only supports the rotor and other components, but also plays a role in realizing the exhaust of the compressor.
[0037] In order to support the rotor, the exhaust bearing seat is usually provided with a positioning hole, and the end of the rotor passes through the positioning hole, so that the exhaust bearing seat can effectively support the rotor. For example, in a twin-screw compressor, the exhaust bearing seat is provided with two positioning holes for the two rotors of the twin-screw compressor to pass through.
[0038] In order to realize the exhaust function of the compressor, an exhaust bearing seat is usually provided with an exhaust hole, an exhaust cavity and an exhaust port. The exhaust cavity is connected with the compression chamber of the compressor located in the shell through the exhaust hole, and is connected with the external environment outside the shell of the compressor through the exhaust port. In this way, the gas compressed by the rotor in the compression chamber can enter the exhaust cavity through the exhaust hole, flow to the exhaust port through the exhaust cavity, and finally be discharged from the exhaust port to the external environment, thereby realizing the exhaust of the compressor.
[0039] In practice, it is found that when the gas is discharged through the exhaust bearing seat, there is a large pressure loss, which affects the energy efficiency of the compressor. After research, it is found that an important reason for the large pressure loss in the process of gas discharge through the exhaust bearing seat is that there is usually only one exhaust cavity on the exhaust bearing seat, which leads to a small exhaust space on the exhaust bearing seat. When the compressed gas flows through the exhaust bearing seat, the pressure loss is large.
[0040] In view of the above situation, the present application provides an exhaust bearing seat and a compressor, which optimizes the structure of the exhaust bearing seat to reduce the pressure loss of gas during discharge through the exhaust bearing seat (which can be simply referred to as exhaust pressure loss) and improve the energy efficiency of the compressor.
[0041] Figure 1-Figure 2 The structure of the exhaust bearing seat of the present application is shown exemplarily.
[0042] See also Figure 1-Figure 2 In the present application, the exhaust bearing seat includes a seat body 1, an exhaust port 2, an exhaust port 4 and at least two exhaust chambers 3. The exhaust port 2 is arranged on the seat body 1 and is used to communicate with the compression chamber (not shown) of the compressor. The exhaust port 4 is arranged on the seat body 1 and is used to communicate with the external environment. All exhaust chambers 3 are arranged in the seat body 1, and the inlets of all exhaust chambers 3 are connected to the exhaust port 2 in parallel with each other, and the outlets are all connected to the exhaust port 4, so that the gas in the compression chamber compressed by the rotor of the compressor flows through the exhaust port 2 through at least two exhaust chambers 3 and then converges to the exhaust port 4 for discharge.
[0043] In the above scheme, the exhaust bearing seat is no longer provided with only one exhaust chamber 3, but with at least two exhaust chambers 3. That is to say, on the basis of the original exhaust chamber 3, at least one exhaust chamber 3 is added, which allows the compressed gas to be discharged through more exhaust chambers 3, effectively expanding the exhaust space on the exhaust bearing seat. Therefore, the pressure loss of the compressed gas when flowing through the exhaust bearing seat can be reduced, thereby improving the energy efficiency of the compressor.
[0044] It can be seen that by arranging at least two exhaust cavities 3 on the exhaust bearing seat, the number of exhaust cavities 3 on the exhaust bearing seat is increased from one to at least two, which is beneficial to expanding the exhaust space, reducing the exhaust pressure loss, and improving the energy efficiency of the compressor.
[0045] In addition, providing at least two exhaust cavities 3 on the exhaust bearing seat is not only beneficial to expanding the exhaust space, reducing the exhaust pressure loss, and improving the energy efficiency of the compressor, but also has other benefits. For example, since the exhaust cavity 3 is provided inside the seat body 1 of the exhaust bearing seat, it is also possible to improve the utilization rate of the internal space of the exhaust bearing seat, thereby achieving full utilization of the internal space of the exhaust bearing seat. For another example, since the exhaust cavity 3 is obtained by removing material, providing the aforementioned at least two exhaust cavities 3 on the exhaust bearing seat is also beneficial to reducing the weight of the exhaust bearing seat and the compressor, thereby achieving further lightweighting of the exhaust bearing seat and the compressor. For another example, since the aforementioned at least two exhaust cavities 3 are provided on the exhaust bearing seat, the airflow pulsation can be reduced and the aerodynamic noise can be reduced by designing different exhaust cavities 3, thereby also being beneficial to sound absorption and noise reduction.
[0046] For example, to further achieve the purpose of noise reduction, see Figure 1-Figure 2 In some embodiments, among the at least two exhaust cavities 3 provided, the volumes of at least two exhaust cavities 3 are different.
[0047] The exhaust cavities 3 with different volumes can be coupled to each other to achieve a resonance attenuation effect. Specifically, the exhaust cavities 3 with different volumes can cause the airflow to produce different sound frequencies when flowing through, and these airflows with different frequencies will interact and cancel each other out after converging into the exhaust port 4, thus reducing the airflow pulsation and further reducing the aerodynamic noise induced by the airflow pulsation, thereby achieving the purpose of noise reduction.
[0048] It can be seen that by arranging at least two exhaust cavities 3 on the exhaust bearing seat and arranging at least two of the at least two exhaust cavities 3 to have different volumes, airflow pulsation can be reduced and exhaust noise can be lowered.
[0049] Furthermore, by arranging exhaust chambers 3 of different volumes on the exhaust bearing seat, noise reduction can be achieved without adding any additional components. The noise reduction effect can be achieved without adding any additional compressor parts, and the structure is simple.
[0050] It can be seen that by arranging at least two exhaust cavities 3 on the exhaust bearing seat, and arranging at least two of the at least two exhaust cavities 3 to have different volumes, the purpose of sound absorption and noise reduction can be achieved based on a relatively simple structure.
[0051] The volume relationship between the exhaust cavities 3 with different volumes affects the specific effect of sound absorption and noise reduction. The sound absorption and noise reduction effect can be optimized by optimizing and adjusting the volume of the exhaust cavities 3.
[0052] Exemplarily, the at least two exhaust chambers 3 include a first chamber 31 and a second chamber 32 , and a volume ratio of the first chamber 31 to the second chamber 32 is 2-4.
[0053] After research, it was found that when the volume ratio of the first cavity 31 and the second cavity 32 is 2 to 4, the volume size relationship between the first cavity 31 and the second cavity 32 is more appropriate, the first cavity 31 and the second cavity 32 have better noise reduction characteristics, and can cooperate to achieve better resonance attenuation effect.
[0054] For example, studies have shown that when the volume ratio of the first cavity 31 to the second cavity 32 is 2.5 to 3.5, the two can cooperate to achieve a relatively large noise reduction effect at multiple frequencies such as the fundamental frequency, 2nd frequency and 3rd frequency of air flow pulsation. Specifically, when the volume ratio of the first cavity 31 to the second cavity 32 is 3, the two can cooperate to achieve a noise reduction effect of more than 10dB at the fundamental frequency, 2nd frequency and 3rd frequency of air flow pulsation.
[0055] The first cavity 31 and the second cavity 32 can be located at any position on the base body 1. As an example, see Figure 1 , the first cavity 31 and the second cavity 32 are located on opposite sides of the exhaust port 2. At this time, the first cavity 31 and the second cavity 32 are arranged at a more reasonable position, which is more convenient for the arrangement of the first cavity 31 and the second cavity 32, and is conducive to making full use of the space on the seat body 1, and it is also more convenient to achieve the communication between the first cavity 31 and the second cavity 32 and the exhaust port 2.
[0056] In the aforementioned embodiments in which the exhaust cavities 3 with different volumes are provided, the exhaust cavity 3 with a larger volume may have a larger cross-sectional area than the exhaust cavity 3 with a smaller volume, and / or a greater depth than the exhaust cavity 3 with a smaller volume. For example, the aforementioned first cavity 31 may have a larger cross-sectional area than the second cavity 32, and / or a greater depth than the second cavity 32. In this way, the volume of one or some exhaust cavities 3 may be conveniently made larger than the volume of another or other exhaust cavities 3.
[0057] In addition, in the aforementioned embodiments, in order to achieve the communication between each exhaust cavity 3 and the exhaust port 2, the inlet of each exhaust cavity 3 can be connected to the exhaust port 2. At this time, there is no other connecting structure between the inlet of the exhaust cavity 3 and the exhaust port 2, and the two are directly connected, or, see Figure 1-Figure 2 At least two flow channels 6 may also be provided on the seat body 1, and the at least two flow channels 6 correspond to the at least two exhaust chambers 3 one by one to connect the inlets of the at least two exhaust chambers 3 with the exhaust port 2. At this time, the inlet of each exhaust chamber 3 is not directly connected to the exhaust port 2, but is connected to the exhaust port 2 through its corresponding flow channel 6.
[0058] Compared with the case where the entrance of each exhaust cavity 3 is directly connected to the exhaust port 2, when the entrance of each exhaust cavity 3 is connected to the exhaust port 2 through its corresponding flow channel 6, since the exhaust cavity 3 can be connected to the exhaust port 2 through the flow channel 6 regardless of its distance from the exhaust port 2 and its shape, the requirements on the shape and position of each exhaust cavity 3 can be reduced, and the connection between each exhaust cavity 3 and the exhaust port 2 can be achieved more conveniently.
[0059] In the embodiment in which at least two flow channels 6 are provided on the seat body 1, the arrangement positions of the flow channels 6 can be varied. Figure 1 , the at least two flow channels 6 are located between the two positioning holes 5 for the rotor of the compressor to pass through. At this time, the arrangement positions of the at least two flow channels 6 are more reasonable, and the space between the two positioning holes 5 can be fully utilized.
[0060] Based on the exhaust bearing seat of each of the above embodiments, the present application also provides a compressor, which includes the exhaust bearing seat of any embodiment. The compressor can be various types of compressors such as a twin-screw compressor.
[0061] Next, combine Figure 1-Figure 2 The illustrated embodiments further illustrate the present application.
[0062] like Figure 1-Figure 2 As shown, in this embodiment, the exhaust bearing seat is an exhaust bearing seat of a twin-screw compressor, and its seat body 1 is provided with two positioning holes 5, an exhaust port 2, two flow channels 6, two exhaust cavities 3, and an exhaust port 4.
[0063] Among them, the two positioning holes 5 are located on the same circular surface, arranged side by side, and located on both sides of the center of the circular surface, for respectively passing and positioning the ends of the two rotors of the twin-screw compressor to realize the support function of the exhaust bearing seat for the rotor.
[0064] The exhaust port 2, the two flow channels 6, the two exhaust chambers 3, and the exhaust port 4 are sequentially connected along the direction in which the gas flows through the exhaust bearing seat (also referred to as the exhaust direction), thereby realizing the exhaust function of the exhaust bearing seat.
[0065] Among them, Figure 1 As shown, the exhaust port 2 is located between the two positioning holes 5 and is used to communicate with the compression chamber of the compressor so that the gas in the compression chamber compressed by the rotor can enter the exhaust bearing seat.
[0066] The two flow channels 6 correspond to the two exhaust chambers 3 one by one, and the inlets of the two exhaust chambers 3 are connected to the exhaust port 2, so that the gas entering the exhaust bearing seat through the exhaust port 2 can be divided into two streams, respectively flowing into the two exhaust chambers 3 through the two flow channels 6.
[0067] Furthermore, the outlets of the two exhaust cavities 3 are both connected to the exhaust port 4 , so that the two air flows flowing into the two exhaust cavities 3 can converge into the exhaust port 4 after flowing out of the two exhaust cavities 3 .
[0068] The exhaust port 4 is connected to the external environment of the compressor, so that the gas gathered from the two exhaust chambers 3 to the exhaust port 4 can be discharged to the external environment through the exhaust port 4, thereby realizing the discharge of the compressed gas.
[0069] Specifically, Figure 1 and Figure 2 As shown, in this embodiment, two flow channels 6 are located between two positioning holes 5, namely the first flow channel 61 and the second flow channel 62; and two exhaust cavities 3 are located on opposite sides of the exhaust port 2 and the two positioning holes 5, namely the first cavity 31 and the second cavity 32.
[0070] More specifically, if Figure 1 and Figure 2 As shown, in this embodiment, the first cavity 31 is the original exhaust cavity 3 of the exhaust bearing seat, which is located on the first side of the exhaust port 2 and the two positioning holes 5, and its inlet is connected to the exhaust port 2 through the narrower first flow channel 61 originally on the exhaust bearing seat, and its outlet is connected to the exhaust port 4. The second cavity 32 is a newly added exhaust cavity 3 on the exhaust bearing seat, which is located on the second side of the exhaust port 2 and the two positioning holes 5 opposite to the first side, and its inlet is connected to the exhaust port 2 through the newly added narrower second flow channel 62, and its outlet is connected to the exhaust port 4.
[0071] The volume of the first cavity 31 is greater than that of the second cavity 32 , and the volume ratio between the two is 3.
[0072] Based on the above arrangement, when the twin-screw compressor is working, the fluid medium is compressed by the two rotors and enters the exhaust port 2 from the compression chamber, and then is divided into two parts, one part flows into the first chamber 31 through the first flow channel 61, and the other part flows into the second chamber 32 through the second flow channel 62. Afterwards, the two parts of the airflow merge, flow into the exhaust port 4, and are discharged through the exhaust port 4.
[0073] In the above exhaust process, since the gas can be discharged not only through the existing first chamber 31 but also through the newly added second chamber 32, the exhaust space is larger, thus effectively reducing the exhaust pressure loss and improving the energy efficiency of the compressor.
[0074] Furthermore, since the volumes of the first cavity 31 and the second cavity 32 are different, the two airflows flowing through the first cavity 31 and the second cavity 32 generate different sound frequencies, so that when the two airflows flow out of the first cavity 31 and the second cavity 32 and merge into the exhaust port 4, the two airflows of different frequencies can interact with each other and cancel each other out, thereby consuming sound energy by overcoming friction, reducing airflow pulsation, and reducing aerodynamic noise.
[0075] Since the pneumatic noise generated by air flow pulsation and the mechanical noise generated by rotor contact wear are the main noise sources of various types of compressors such as screw compressors, the first cavity 31 and the second cavity 32 with different volumes cooperate with each other to reduce air flow pulsation and pneumatic noise, thereby effectively reducing the noise of the compressor. This is conducive to better meeting the market's increasingly high requirements for compressor noise reduction effects.
[0076] Moreover, in this embodiment, the volume ratio of the first cavity 31 to the second cavity 32 is 3, and the noise can be reduced by more than 10 dB at the fundamental frequency, 2nd harmonic frequency and 3rd harmonic frequency of the airflow pulsation, and the noise reduction effect is significant.
[0077] Figure 1 In the figure, θ represents the angle between the edge tangent of the second cavity 32 and the center line of the two positioning holes 5. As θ decreases, the volume of the second cavity 32 increases. Studies have shown that as θ decreases, that is, as the volume of the second cavity 32 increases, the noise reduction characteristic frequency gradually shifts to a low frequency, that is, the sound gradually decreases, and the noise reduction effect gradually improves.
[0078] It can be seen that this embodiment optimizes the structure of the exhaust bearing seat. On the basis of the original exhaust chamber 3 and the flow channel 6, an exhaust chamber 3 and a flow channel 6 are added, and the volumes of the two exhaust chambers 3 are set to be different. This can not only expand the exhaust space after compression to a certain extent, reduce the exhaust pressure loss, and improve the energy efficiency of the compressor, but also make full use of the internal space of the exhaust bearing seat, combine the silencer structure with the exhaust bearing seat, and achieve the silencer effect without adding additional compressor parts, reduce the use of compressor parts, and do not increase the volume of the compressor. While achieving the purpose of noise reduction, the structure of the compressor is simplified.
[0079] The above description is only an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. An exhaust bearing seat, characterized in that: include: base(1); An exhaust port (2) is arranged on the seat body (1) and is used to communicate with the compression chamber of the compressor; An exhaust port (4) is arranged on the seat body (1) and is used for communicating with the external environment; and At least two exhaust chambers (3) are arranged in the seat body (1), the inlets of the at least two exhaust chambers (3) are connected in parallel with the exhaust port (2), and the outlets of the at least two exhaust chambers (3) are connected with the exhaust port (4), so that the gas in the compression chamber compressed by the rotor of the compressor flows through the exhaust port (2) through the at least two exhaust chambers (3) and then converges to the exhaust port (4) for discharge.
2. The exhaust bearing seat according to claim 1, characterized in that: At least two of the at least two exhaust cavities (3) have different volumes.
3. The exhaust bearing seat according to claim 2, characterized in that: The at least two exhaust chambers (3) include a first chamber (31) and a second chamber (32), and the volume ratio of the first chamber (31) to the second chamber (32) is 2-4.
4. The exhaust bearing seat according to claim 3, characterized in that: The volume ratio of the first chamber (31) to the second chamber (32) is 2.5 to 3.
5.
5. The exhaust bearing seat according to claim 4, characterized in that: The volume ratio of the first chamber (31) to the second chamber (32) is 3.
6. The exhaust bearing seat according to claim 3, characterized in that: The first chamber (31) and the second chamber (32) are located on opposite sides of the exhaust port (2).
7. The exhaust bearing seat according to any one of claims 1 to 6, characterized in that: At least two flow channels (6) are provided on the seat body (1), and the at least two flow channels (6) correspond to the at least two exhaust cavities (3) one by one, connecting the inlets of the at least two exhaust cavities (3) with the exhaust orifice (2).
8. The exhaust bearing seat according to claim 7, characterized in that: The seat body (1) is provided with two positioning holes (5), the two positioning holes (5) are used for allowing the rotor of the compressor to pass through, and the at least two flow channels (6) are located between the two positioning holes (5).
9. A compressor, characterized in that: It comprises an exhaust bearing seat as described in any one of claims 1-8.
10. The compressor according to claim 9, characterized in that The compressor is a twin-screw compressor.