Water-cooled composite muffler for oil-free screw blower

Abstract

The utility model belongs to the technical field of silencer, especially a water -cooling type composite silencer for oil -free screw blower, including the silencer main part, the water cooling heat dissipation subassembly of being set in the silencer main part outside and be used for sealing the sealing structure of water cooling heat dissipation subassembly, the inside of silencer main part is equipped with the flow -guiding silencing structure for changing airflow path, water cooling heat dissipation subassembly has the water -cooling cavity for circulating cooling medium, the sealing structure is equipped with the water inlet and the water outlet of intercommunication with water cooling cavity, through the resistance silencing of bowl -shaped flow -guiding spare, the effect of reducing noise is good, through water cooling heat dissipation subassembly cooperation external cold water circulation, avoid the aging of silencer main part material and shell deformation caused by high temperature, prolong the life, water cooling heat dissipation subassembly is fixed with the silencer main part through the positioning component, and sealing structure ensures that cooling medium does not leak and does not contact with airflow, avoids the interference to the silencing effect, and the detachable connection design is convenient for the later maintenance and part replacement.

Description

Technical Field

[0001] This utility model belongs to the field of silencer technology, specifically relating to a water-cooled composite silencer for an oil-free screw blower. Background Technology

[0002] Screw blowers, as a type of high-efficiency gas compression equipment, are widely used in industrial fields such as wastewater treatment, pneumatic conveying, and new energy due to their advantages such as no lubricating oil in the compression chamber, high gas purity, and good environmental performance. However, they also have two major problems during operation:

[0003] On the one hand, the sudden change in airflow velocity at the exhaust port (from the high-pressure chamber into the normal-pressure pipe) will cause gas turbulence and violent collision with the inner wall of the pipe, generating strong noise of 100-120dB, which far exceeds the noise limit for industrial sites (85dB). This not only harms the hearing health of workers, but may also cause noise pollution to the surrounding environment.

[0004] On the other hand, the mechanical friction and gas compression process during the operation of the screw blower will generate a lot of heat, causing the exhaust temperature to rise to 80-120℃. Traditional silencers are not designed with heat dissipation mechanisms for high-temperature environments: high temperatures will cause the sound-absorbing materials (such as glass wool, polyurethane, etc.) to age faster and their sound absorption performance to decline. At the same time, the high-temperature airflow will cause the silencer shell to expand and deform due to heat, which will damage the sealing structure, shorten the service life of the equipment, and in severe cases, even require shutdown for maintenance, affecting the continuity of production.

[0005] In existing technologies, some silencers attempt to achieve passive heat dissipation by adding heat dissipation holes or heat sinks, but the heat dissipation efficiency is low and cannot match the heat generation rate of screw blowers; in addition, a few silencers with cooling functions have a disconnect between the cooling structure and the silencing structure design, and the cooling medium is prone to interference with the airflow, which actually affects the silencing effect. Therefore, developing a composite silencer that can achieve efficient silencing and active heat dissipation in a coordinated manner has become the key to solving the above problems.

[0006] To address the aforementioned problems, this utility model proposes a water-cooled composite silencer for an oil-free screw blower. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides a water-cooled composite silencer for oil-free screw blowers, which features convenient use, easy heat dissipation, and long service life.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a water-cooled composite silencer for an oil-free screw blower, comprising a silencer body, a water-cooled heat dissipation assembly sleeved on the outside of the silencer body, and a sealing structure for sealing the water-cooled heat dissipation assembly;

[0009] The muffler body is equipped with a flow-guiding and noise-reducing structure for changing the airflow path;

[0010] The water-cooled heat dissipation assembly has a water-cooled cavity for the flow of cooling medium;

[0011] The sealing structure is provided with an inlet and an outlet that communicate with the water-cooling cavity.

[0012] As a preferred technical solution of this utility model, the water-cooled heat dissipation component includes an inner heat-conducting sleeve and an outer heat-conducting sleeve. The inner heat-conducting sleeve is attached to the outer wall of the muffler body, and the outer heat-conducting sleeve is sleeved outside the inner heat-conducting sleeve. The water-cooling cavity is formed between the inner heat-conducting sleeve and the outer heat-conducting sleeve.

[0013] The water-cooling cavity has an opening at only one end, and the sealing structure is fixed to the opening end of the water-cooling cavity.

[0014] As a preferred embodiment of this utility model, both the inner heat-conducting sleeve and the outer heat-conducting sleeve are aluminum alloy tubes, and the inner heat-conducting sleeve has several protruding structures on the side facing the water-cooling cavity.

[0015] As a preferred embodiment of this utility model, the protruding structure is a heat dissipation fin that is evenly distributed along the circumferential direction of the inner wall of the inner heat-conducting sleeve.

[0016] As a preferred technical solution of this utility model, the flow guiding and noise reduction structure includes at least one flow guiding component disposed on the inner wall of the muffler body, and the flow guiding component is provided with a flow guiding hole.

[0017] As a preferred embodiment of this utility model, the guide member is a bowl-shaped guide bowl, and the opening direction of the guide bowl is opposite to the airflow direction; multiple guide bowls are distributed at equal intervals along the axial direction of the muffler body, and the guide holes on adjacent guide bowls are staggered.

[0018] As a preferred embodiment of this utility model, the sealing structure includes:

[0019] A sealing disc, which is sleeved on the muffler body and detachably installed at the opening end of the water-cooled heat dissipation assembly;

[0020] The mounting flange is fixed to the outer wall of the open end of the outer heat-conducting sleeve;

[0021] A first rubber sealing ring is disposed between the sealing disc and the mounting flange; and

[0022] The second rubber sealing ring is disposed between the sealing disc and the inner heat-conducting sleeve.

[0023] As a preferred technical solution of this utility model, it also includes:

[0024] Multiple locking bolts, the multiple locking bolts being equally spaced along the circumference and penetrating the sealing disc and the mounting flange; and

[0025] A locking nut is provided on the protruding end of the locking bolt by means of thread engagement.

[0026] As a preferred technical solution of this utility model, it also includes a positioning component, wherein the closed end of the water-cooled heat dissipation component is detachably connected to the muffler body by means of the positioning component.

[0027] As a preferred embodiment of this utility model, the positioning component includes:

[0028] A limiting plate is fixed to the outer wall of the muffler body, and a plurality of positioning holes are provided on the limiting plate at equal intervals along the circumferential direction.

[0029] A positioning screw, the positioning screw being fixed to the closed end face of the water-cooled heat dissipation assembly and passing through the positioning hole; and

[0030] A wing nut is provided on the extended end of the positioning screw by means of thread engagement.

[0031] Compared with the prior art, the beneficial effects of this utility model are:

[0032] 1. The bowl-shaped flow guide provides effective noise reduction (by changing the airflow direction and forming an expansion cavity), meeting the requirements of industrial sites.

[0033] 2. By using a water-cooled heat dissipation component in conjunction with an external cold water circulation system, the heat from the muffler body and airflow can be quickly removed, preventing the muffler body material from aging and the shell from deforming due to high temperatures, thus extending its service life.

[0034] 3. The water-cooled heat dissipation components and the muffler body are fixed by positioning components. The sealed structure ensures that the cooling medium does not leak and does not come into contact with the airflow, thus avoiding interference with the noise reduction effect. The detachable connection design facilitates later maintenance and component replacement.

[0035] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of this utility model;

[0038] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0039] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0040] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B in the diagram;

[0041] Figure 5 This is a schematic diagram of the isometric structure of the water-cooled heat dissipation sleeve in this utility model;

[0042] Figure 6 This is a partial cross-sectional view of the main body of the muffler in this utility model.

[0043] In the diagram: 1. Silencer body; 11. Flow guide bowl; 111. Flow guide hole; 2. Water-cooled heat dissipation assembly; 21. Inner heat conduction sleeve; 211. Heat dissipation fins; 22. Outer heat conduction sleeve; 221. Mounting flange; 23. Water-cooled cavity; 3. Sealing plate; 31. Water inlet; 32. Water outlet; 4. Locking bolt; 5. Locking nut; 6. First rubber sealing ring; 7. Second rubber sealing ring; 8. Limiting plate; 81. Positioning hole; 9. Positioning screw; 10. Wing nut. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] Please see Figures 1-6 The present invention provides the following technical solution: a water-cooled composite silencer for an oil-free screw blower, comprising a silencer body 1, a water-cooled heat dissipation component 2 sleeved on the outside of the silencer body 1, and a sealing structure for sealing the water-cooled heat dissipation component 2.

[0046] Furthermore, by Figure 1 , Figure 2 and Figure 6As shown in this embodiment, the muffler body 1 is provided with a flow-guiding and noise-reducing structure for changing the airflow path. The flow-guiding and noise-reducing structure includes at least one flow guide on the inner wall of the muffler body 1. The flow guide is provided with a flow guide hole 111. The flow guide is a bowl-shaped flow guide bowl 11, and the opening direction of the flow guide bowl 11 is opposite to the airflow direction. Multiple flow guide bowls 11 are evenly distributed along the axial direction of the muffler body 1, and the flow guide holes 111 on adjacent flow guide bowls 11 are staggered. With the above scheme, when the airflow generated by the oil-free screw blower enters the muffler body 1, it will first interact with the flow guide bowls 11 that are evenly distributed along the axial direction. Since the flow guide bowl 11 is a bowl-shaped structure and the opening direction is opposite to the airflow direction, when the airflow comes into contact with the first flow guide bowl 11, it will be blocked by the bowl body. The airflow will gather towards the center along the bowl wall and then continue to flow forward through the flow guide hole 111 on the flow guide bowl 11.

[0047] The guide holes 111 on adjacent guide bowls 11 are staggered, which means that the airflow from the guide hole 111 of the upstream guide bowl 11 cannot directly enter the guide hole 111 of the downstream guide bowl 11 in a straight line. It must change its flow direction again in the space between the two guide bowls 11, and enter the downstream guide hole 111 after collision and diffusion. This design of changing the airflow path multiple times can effectively consume the energy of the airflow and reduce the airflow velocity, thereby playing a significant role in noise reduction. At the same time, during the collision with the guide bowl 11 and the flow in the guide hole 111, some sound waves are absorbed and reflected by the guide component, further weakening the propagation of noise.

[0048] The water-cooled heat dissipation assembly 2 has a water-cooled cavity 23 for the flow of cooling medium. The sealing structure is provided with an inlet 31 and an outlet 32 ​​that communicate with the water-cooled cavity 23. The water-cooled heat dissipation assembly 2 includes an inner heat-conducting sleeve 21 and an outer heat-conducting sleeve 22. The inner heat-conducting sleeve 21 is attached to the outer wall of the muffler body 1, and the outer heat-conducting sleeve 22 is sleeved on the outside of the inner heat-conducting sleeve 21. The water-cooled cavity 23 is formed between the inner heat-conducting sleeve 21 and the outer heat-conducting sleeve 22. The water-cooled cavity 23 has an opening at only one end, and the sealing structure is fixed to the opening end of the water-cooled cavity 23. With the above solution, during use, the cooling medium enters the water-cooled cavity 23 from the inlet 31 on the sealing structure. Since the water-cooled cavity 23 has an opening at only one end, and the sealing structure is fixed to the opening end, the cooling medium cannot leak from other positions after entering, and can only flow in the space enclosed by the inner heat-conducting sleeve 21 and the outer heat-conducting sleeve 22.

[0049] The inner heat-conducting sleeve 21 is attached to the outer wall of the muffler body 1. When the muffler body 1 generates heat due to the internal airflow, the heat will be quickly transferred to the inner heat-conducting sleeve 21. At this time, the cooling medium flowing in the water-cooling cavity 23 comes into full contact with the inner heat-conducting sleeve 21 and absorbs the heat on the inner heat-conducting sleeve 21 through heat exchange, thereby reducing the temperature of the muffler body 1.

[0050] As the cooling medium continues to flow in the water-cooled cavity 23, the cooling medium that has absorbed heat will gradually move to the other end of the water-cooled cavity 23, filling the entire water-cooled cavity 23, and finally flowing out from the outlet 32 ​​on the sealing structure. The outer heat-conducting sleeve 22 is fitted outside the inner heat-conducting sleeve 21, which on the one hand provides a stable boundary for the water-cooled cavity 23, and on the other hand reduces the heat exchange between the cooling medium and the external environment, reduces heat loss, and ensures the heat dissipation efficiency of the cooling medium on the muffler body 1.

[0051] Through this cycle, the cooling medium continuously removes the heat generated by the main body 1 of the silencer. Combined with the noise reduction treatment of the airflow by the flow-guiding and noise-reducing structure, the water-cooled composite silencer of the entire oil-free screw blower effectively reduces noise while maintaining a stable and suitable operating temperature, ensuring the efficient operation of the equipment.

[0052] It should be noted that in actual use, the inlet of the centrifugal pump is connected to the cooling medium storage container, the outlet is connected to the inlet 31, and the outlet 32 ​​is connected to the cooling medium storage container to form a circulation.

[0053] In addition, in actual use, a temperature sensor can be selectively installed on the muffler body 1 and connected to the blower control system. When the temperature sensor detects that the current temperature of the muffler body 1 exceeds the preset value, the centrifugal pump is immediately started to pump the cooling medium into the water-cooled chamber 23. Alternatively, the centrifugal pump can be started synchronously during the operation of the blower to continuously circulate and dissipate heat from the muffler body 1.

[0054] Optionally, by Figure 1 , Figure 2 and Figure 5 As shown in this embodiment, both the inner heat-conducting sleeve 21 and the outer heat-conducting sleeve 22 are aluminum alloy tubes. The inner heat-conducting sleeve 21 has several protruding structures on the side facing the water-cooling cavity 23. The protruding structures are heat dissipation fins 211 that are evenly distributed along the circumference of the inner wall of the inner heat-conducting sleeve 21. With the above solution, when in use, since both the inner heat-conducting sleeve 21 and the outer heat-conducting sleeve 22 are aluminum alloy tubes, and aluminum alloy has excellent thermal conductivity, this provides favorable conditions for rapid heat transfer. When the muffler body 1 generates heat, the heat will be quickly transferred through the fitted inner heat-conducting sleeve 21.

[0055] The inner heat-conducting sleeve 21 has heat dissipation fins 211 evenly distributed along its inner wall circumferentially on the side facing the water-cooling cavity 23. These protruding heat dissipation fins 211 greatly increase the contact area between the inner heat-conducting sleeve 21 and the cooling medium in the water-cooling cavity 23. When the cooling medium enters the water-cooling cavity 23 from the inlet 31, it will make full contact with the outer wall of the inner heat-conducting sleeve 21 and the heat dissipation fins 211.

[0056] The heat transferred from the muffler body 1 to the inner heat-conducting sleeve 21 is partly transferred directly to the cooling medium through the outer wall of the inner heat-conducting sleeve 21, and partly transferred through the heat dissipation fins 211. The heat dissipation fins 211 can distribute the heat more evenly to the cooling medium, improve the efficiency of heat exchange, and enable the cooling medium to absorb heat faster and more.

[0057] Meanwhile, the outer heat-conducting sleeve 22, as an aluminum alloy tube, can also help to further confine the small amount of heat that may be lost around the water-cooling cavity 23, reduce the meaningless diffusion of heat to the outside, and ensure that the cooling medium can remove the heat of the muffler body 1 to the maximum extent. The cooling medium that has absorbed enough heat finally flows out from the outlet 32, completing an efficient heat dissipation cycle, continuously cooling the muffler body 1, ensuring that it works stably at a suitable temperature, and working together with the flow-guiding and noise-reducing structure.

[0058] Optionally, by Figures 1-3 As shown, in this embodiment, the sealing structure includes: a sealing disc 3, a mounting flange 221, a first rubber sealing ring 6, and a second rubber sealing ring 7, and also includes: multiple locking bolts 4 and locking nuts 5. The sealing disc 3 is sleeved on the muffler body 1 and detachably installed on the open end of the water-cooled heat dissipation component 2. The mounting flange 221 is fixed to the outer wall of the open end of the outer heat-conducting sleeve 22. The first rubber sealing ring 6 is disposed between the sealing disc 3 and the mounting flange 221, and the second rubber sealing ring 7 is disposed between the sealing disc 3 and the inner heat-conducting sleeve 21. The multiple locking bolts 4 are evenly distributed along the circumferential direction and penetrate the sealing disc 3 and the mounting flange 221. The locking nuts 5 are disposed on the protruding end of the locking bolts 4 by thread engagement. With the above scheme, in use, the sealing structure achieves reliable sealing of the water-cooling cavity 23 through the synergistic action of multiple components. The sealing disc 3 is sleeved on the muffler body 1, and a first rubber sealing ring 6 is disposed between it and the mounting flange 221 at the open end of the water-cooled heat dissipation component 2, and a second rubber sealing ring 7 is disposed between it and the inner heat-conducting sleeve 21.

[0059] When multiple locking bolts 4, evenly spaced along the circumference, pass through the sealing disc 3 and the mounting flange 221, and the locking nuts 5 are screwed onto the protruding ends of the locking bolts 4, the axial force generated by the locking bolts 4 and the locking nuts 5 will press the sealing disc 3 tightly against the mounting flange 221 and the inner heat-conducting sleeve 21.

[0060] During this process, the first rubber sealing ring 6 undergoes elastic deformation due to the compression of the sealing disc 3 and the mounting flange 221, filling the gap between them and effectively preventing the cooling medium from leaking from the connection between the outer heat-conducting sleeve 22 and the sealing disc 3; the second rubber sealing ring 7 also undergoes elastic deformation under the compression of the sealing disc 3 and the inner heat-conducting sleeve 21, sealing the gap between the inner heat-conducting sleeve 21 and the sealing disc 3, preventing the cooling medium from leaking from the inside.

[0061] This double-sealing design, combined with the balanced pressure from the evenly distributed locking bolts 4, ensures the sealing of the water-cooled cavity 23, allowing the cooling medium to flow stably within the water-cooled cavity 23 and successfully absorb the heat from the muffler body 1. At the same time, it prevents cooling medium leakage from affecting the overall operating efficiency and service life of the muffler, providing an important guarantee for the reliable operation of the entire water-cooled composite muffler.

[0062] Optionally, by Figure 1 , Figure 2 and Figure 4 As shown in this embodiment, a positioning component is also included. The closed end of the water-cooled heat dissipation component 2 is detachably connected to the muffler body 1 using the positioning component. The positioning component includes a limiting plate 8, a positioning screw 9, and a wing nut 10. The limiting plate 8 is fixed to the outer wall of the muffler body 1, and multiple positioning holes 81 are evenly distributed along the circumferential direction on the limiting plate 8. The positioning screw 9 is fixed to the end face of the closed end of the water-cooled heat dissipation component 2 and passes through the positioning holes 81. The wing nut 10 is provided at the protruding end of the positioning screw 9 by thread engagement. With the above solution, in use, the positioning component achieves detachable connection and precise positioning of the closed end of the water-cooled heat dissipation component 2 and the muffler body 1 through the synergistic action of the limiting plate 8, the positioning screw 9, and the wing nut 10.

[0063] The limiting plate 8 is fixed to the outer wall of the muffler body 1. Its multiple positioning holes 81, which are evenly distributed along the circumference, provide accurate installation positions for the positioning screws 9. When the water-cooled heat dissipation component 2 is installed, the positioning screws 9 fixed to its closed end face will pass through the positioning holes 81 on the limiting plate 8 one by one. This step can quickly determine the circumferential and axial positions of the water-cooled heat dissipation component 2 on the muffler body 1, and avoid problems such as poor fit between the inner heat-conducting sleeve 21 and the muffler body 1 due to installation deviation, or deformation of the water-cooling cavity 23 between the outer heat-conducting sleeve 22 and the inner heat-conducting sleeve 21.

[0064] After the positioning screw 9 passes through the positioning hole 81, the wing nut 10 is screwed onto the protruding end of the positioning screw 9 by means of thread engagement. When the wing nut 10 is tightened, it will generate axial pressure on the limiting plate 8, thereby firmly fixing the closed end of the water-cooled heat dissipation component 2 to the muffler body 1. This fixing method can not only ensure that the water-cooled heat dissipation component 2 will not be displaced due to airflow vibration or cooling medium flow during operation, and ensure that the inner heat-conducting sleeve 21 is always tightly attached to the muffler body 1 to efficiently transfer heat, but also make the water-cooling cavity 23 maintain a stable shape and volume, ensuring smooth flow of cooling medium and heat exchange efficiency.

[0065] Meanwhile, due to the adoption of a detachable threaded connection structure, when it is necessary to maintain or replace the water-cooled heat dissipation component 2, simply unscrew the wing nut 10 and pull out the positioning screw 9 to remove it from the muffler body 1. The operation is convenient and conducive to the later maintenance of the equipment.

[0066] Components not described in detail in this article are existing technologies.

[0067] The working principle and usage process of this utility model: When the airflow generated by the oilless screw blower enters the muffler body 1, it will first interact with the guide bowls 11 that are evenly distributed along the axial direction. Since the guide bowls 11 adopt a bowl-shaped structure and the opening direction is opposite to the airflow direction, when the airflow comes into contact with the first guide bowl 11, it will be blocked by the bowl body. The airflow will gather towards the center along the bowl wall and then continue to flow forward through the guide hole 111 on the guide bowl 11.

[0068] The key is that the guide holes 111 on adjacent guide bowls 11 are staggered. This means that the airflow from the guide hole 111 of the upstream guide bowl 11 cannot directly enter the guide hole 111 of the downstream guide bowl 11 in a straight line. It must change direction again in the space between the two guide bowls 11, and enter the downstream guide hole 111 after collision and diffusion. This design of changing the airflow path multiple times can effectively consume the energy of the airflow and reduce the airflow velocity, thereby playing a significant role in noise reduction. At the same time, during the collision with the guide bowl 11 and the flow in the guide hole 111, some sound waves are absorbed and reflected by the guide component, further weakening the propagation of noise.

[0069] While the airflow is silenced, the heat generated by the friction and vibration of the airflow in the main body 1 of the silencer needs to be dissipated in time. This process is completed by the water-cooled heat dissipation component 2. The cooling medium enters the water-cooled cavity 23 from the water inlet 31 on the sealing structure. Since the water-cooled cavity 23 has an opening at only one end and the sealing structure is fixed to the opening end, the cooling medium cannot leak from other positions after entering. It can only flow in the space enclosed by the inner heat-conducting sleeve 21 and the outer heat-conducting sleeve 22.

[0070] The inner heat-conducting sleeve 21 is attached to the outer wall of the muffler body 1. When the muffler body 1 generates heat due to the internal airflow, the heat will be quickly transferred to the inner heat-conducting sleeve 21. At this time, the cooling medium flowing in the water-cooling cavity 23 is in full contact with the inner heat-conducting sleeve 21 and absorbs the heat on the inner heat-conducting sleeve 21 through heat exchange, thereby reducing the temperature of the muffler body 1. Part of the heat transferred from the muffler body 1 to the inner heat-conducting sleeve 21 is directly transferred to the cooling medium through the outer wall of the inner heat-conducting sleeve 21, and the other part is transferred through the heat dissipation fins 211. The heat dissipation fins 211 can distribute the heat more evenly to the cooling medium, improve the efficiency of heat exchange, and enable the cooling medium to absorb heat faster and more.

[0071] As the cooling medium continues to flow in the water-cooled cavity 23, the cooling medium that has absorbed heat will gradually move to the other end of the water-cooled cavity 23, fill the entire water-cooled cavity 23, and finally flow out from the outlet 32 ​​on the sealing structure.

[0072] The water-cooled heat dissipation component 2 adopts a detachable threaded connection structure. When it is necessary to maintain or replace the water-cooled heat dissipation component 2, simply unscrew the wing nut 10 and pull out the positioning screw 9 to remove it from the muffler body 1. The operation is convenient and conducive to the later maintenance of the equipment.

[0073] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water-cooled composite silencer for an oil-free screw blower, characterized in that, It includes a muffler body (1), a water-cooled heat dissipation assembly (2) sleeved on the outside of the muffler body (1), and a sealing structure for sealing the water-cooled heat dissipation assembly (2); The muffler body (1) is provided with a flow-guiding and noise-reducing structure for changing the airflow path; The water-cooled heat dissipation assembly (2) has a water-cooled cavity (23) for the flow of cooling medium. The sealing structure is provided with an inlet (31) and an outlet (32) that communicate with the water-cooled cavity (23).

2. The water-cooled composite silencer for an oil-free screw blower according to claim 1, characterized in that: The water-cooled heat dissipation assembly (2) includes an inner heat-conducting sleeve (21) and an outer heat-conducting sleeve (22). The inner heat-conducting sleeve (21) is attached to the outer wall of the muffler body (1), and the outer heat-conducting sleeve (22) is sleeved on the outside of the inner heat-conducting sleeve (21). The water-cooling cavity (23) is formed between the inner heat-conducting sleeve (21) and the outer heat-conducting sleeve (22). The water-cooled cavity (23) has an opening at only one end, and the sealing structure is fixed to the opening end of the water-cooled cavity (23).

3. The water-cooled composite silencer for an oil-free screw blower according to claim 2, characterized in that: Both the inner heat-conducting sleeve (21) and the outer heat-conducting sleeve (22) are aluminum alloy tubes. The inner heat-conducting sleeve (21) has several protruding structures on the side facing the water-cooling cavity (23).

4. The water-cooled composite silencer for an oil-free screw blower according to claim 3, characterized in that: The protruding structure consists of heat dissipation fins (211) that are evenly distributed along the circumferential direction of the inner wall of the inner heat-conducting sleeve (21).

5. The water-cooled composite silencer for an oil-free screw blower according to claim 1, characterized in that: The flow-guiding and noise-reducing structure includes at least one flow-guiding component disposed on the inner wall of the muffler body (1), and the flow-guiding component is provided with a flow-guiding hole (111).

6. The water-cooled composite silencer for an oil-free screw blower according to claim 5, characterized in that: The flow guide is a bowl-shaped flow guide (11), and the opening direction of the flow guide (11) is opposite to the airflow direction; multiple flow guides (11) are distributed at equal intervals along the axial direction of the muffler body (1), and the flow guide holes (111) on adjacent flow guides (11) are staggered.

7. The water-cooled composite silencer for an oil-free screw blower according to claim 2, characterized in that: The sealing structure includes: The sealing disc (3) is sleeved on the muffler body (1) and can be detachably installed on the opening end of the water-cooled heat dissipation assembly (2); Mounting flange (221), which is fixed to the outer wall of the open end of the outer heat-conducting sleeve (22); A first rubber sealing ring (6) is disposed between the sealing disc (3) and the mounting flange (221); and The second rubber sealing ring (7) is disposed between the sealing disc (3) and the inner heat-conducting sleeve (21).

8. The water-cooled composite silencer for an oil-free screw blower according to claim 7, characterized in that: Also includes: Multiple locking bolts (4), the multiple locking bolts (4) being equally spaced along the circumference and penetrating the sealing disc (3) and the mounting flange (221); and Locking nut (5), which is provided on the protruding end of the locking bolt (4) by means of thread engagement.

9. A water-cooled composite silencer for an oil-free screw blower according to claim 2, characterized in that: It also includes a positioning component, wherein the closed end of the water-cooled heat dissipation component (2) is detachably connected to the muffler body (1) using the positioning component.

10. A water-cooled composite silencer for an oil-free screw blower according to claim 9, characterized in that: The positioning component includes: The limiting plate (8) is fixed to the outer wall of the muffler body (1), and multiple positioning holes (81) are provided on the limiting plate (8) at equal intervals along the circumferential direction. A positioning screw (9) is fixed to the closed end face of the water-cooled heat dissipation assembly (2) and passes through the positioning hole (81); and A wing nut (10) is provided at the protruding end of the positioning screw (9) by means of thread engagement.

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