Marine low-vibration noise sampling suction pump
Through the symmetrical double-cavity structure and double-output shaft motor design, combined with the linkage mechanism and composite micro-perforated silencer, the problem of high vibration and noise of traditional sampling air pumps is solved, and a marine sampling air pump with low vibration and noise and high sealing performance is realized.
Patent Information
- Application Number
- CN202422952173.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Traditional sampling air pumps generate vibration noise during movement, affecting the stealth performance of the equipment and the life and work of the crew. The unbalanced structure also causes high vibration noise.
It adopts a symmetrical double-cavity structure and a double-output shaft motor design, and combines the linkage mechanism with the muffler to reduce unbalanced forces and vibration sources, and uses a composite micro-perforated muffler to reduce noise.
Effectively reduce vibration and noise levels, reduce the number of parts and mating surfaces, reduce vibration and noise by more than 10dB, ensure sealing performance and displacement, and improve the stealth performance of the equipment.
Smart Images
Figure CN223410985U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of nuclear radiation detection, and in particular to a ship-based low-vibration and noise sampling air pump. Background Art
[0002] The sampling vacuum pump is a pneumatic diaphragm pump, which is evolved from a reciprocating piston pump with a rubber (or other non-metallic material diaphragm) and a diaphragm chamber. The diaphragm pump uses a crank-connecting rod mechanism to make the rubber diaphragm move in a closed cavity, and uses the rubber diaphragm to separate the conveying medium and the metal piston to ensure that the gas medium components in the sampling area will not mix with other gas media; the sampling vacuum pump technology combines the advantages of high output pressure and durability of the piston pump and the simple structure and corrosion resistance of the diaphragm chamber, and overcomes the shortcomings of easy wear of the piston pump seals and the lack of power source of the diaphragm chamber itself. It is widely used in the industrial field and is an important component equipment in the radiation protection system.
[0003] When the sampling vacuum pump is in motion, the up and down reciprocating motion of the piston and the shaft system will generate various vibration noises. The periodic intake and exhaust will cause intake and exhaust noise. At the same time, the rotation of the motor is transmitted to the surface of the body and stimulates the air on the surface of the body to vibrate, etc. These vibration noise sources will have a great impact on the stealth performance of the equipment, the life and work of the crew, etc.
[0004] The traditional sampling vacuum pump adopts a double-cavity Y-shaped structure. At the output end of the vacuum pump motor, the two cavities form an 80° angle. When moving left and right and up and down, there is a certain unbalanced force, and the motor is in a cantilever state. Figure 1 As shown; and for the traditional vacuum pump structure, the dynamic balance is at the fan position at the rear end of the motor, balancing the dynamic balance force of the two connecting rod components, and the axial position is long, and the vibration noise is large. Utility Model Content
[0005] The present application provides a low-vibration and noise sampling air pump for ships, which adopts a symmetrical double-cavity structure, and the unbalanced forces and moments can offset each other to a certain extent to achieve balance.
[0006] In order to achieve the above-mentioned purpose, the present application provides a marine low-vibration and noise sampling air pump, comprising a motor, a first pump body, a second pump body, a connecting pipe and a muffler, wherein: the first pump body and the second pump body are symmetrically arranged on the left and right sides of the motor; one end of the motor is connected to the linkage mechanism inside the first pump body chamber through a transmission structure, and the other end is connected to the linkage mechanism inside the second pump body chamber through a transmission structure; a connecting pipe is arranged between the top end of the first pump body and the top end of the second pump body, and the connecting pipe is connected to the external gas channel; the muffler is arranged at the outlet end of the connecting pipe.
[0007] Furthermore, the motor is a double-shaft motor with a rated power of 0.7KW, a frequency of 50HZ, and a voltage of 380V.
[0008] Furthermore, the transmission structure includes a fixed tailstock, a fan and a bearing. The motor transmission shaft passes through the bearing and the fan in sequence and is connected to the fixed tailstock on the inner wall of the chamber.
[0009] Furthermore, the linkage mechanism includes a diaphragm, a diaphragm seat and a support arm, wherein: the diaphragm seat is arranged at the top of the support arm; the diaphragm is fixed to the diaphragm seat through a pressure plate; the interior of the support arm is annular, and the whole is eccentrically sleeved on the transmission shaft of the motor; the bottom of the support arm is connected to the transmission shaft of the motor through a hexagonal bolt.
[0010] Furthermore, when working, the motor is started, the drive shaft of the motor rotates, and the support arm is driven to move, so that the diaphragm above the support arm moves up and down, realizing the process of pumping and exhausting air.
[0011] Furthermore, the material of the diaphragm is EPDM rubber.
[0012] Furthermore, the silencer is a composite micro-perforated silencer.
[0013] The present application provides a marine low-vibration and noise sampling air pump, which has the following beneficial effects:
[0014] (1) The present application adopts a symmetrical dual-cavity layout structure. The overall structure is relatively symmetrical, and the unbalanced forces and torques can offset each other to a certain extent to achieve balance. Compared with the cantilever state of the traditional motor, the motor is fixed in the middle of the two pump bodies, which effectively reduces the vibration impact of the motor; at the same time, the design of the motor drive linkage mechanism can maximize the compactness of the structure and effectively control the vibration and noise level while ensuring large displacement and good sealing performance.
[0015] (2) This application uses a composite micro-perforated silencer. By selecting different perforation rates and different cavity depths of plate thicknesses, the spectrum performance of the silencer can be controlled so that it can achieve good silencer effect within the required frequency range.
[0016] (3) The present application has fewer internal parts, thereby reducing the source of vibration. It adopts a double-shaft form, and the linkage mechanism and counterweight are directly installed on the drive shaft of the motor. Compared with the traditional structure, it removes intermediate transmission parts such as couplings and keys. By reducing the number of parts from the source, the number of mating surfaces and vibration sources is reduced, thereby reducing the vibration noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings that constitute part of this application are used to provide a further understanding of this application and make other features, objects and advantages of this application more apparent. The illustrative embodiment drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:
[0018] Figure 1 This is a schematic diagram of an existing traditional Y-type sampling air pump;
[0019] Figure 2 Schematic diagram of a low-vibration and noise sampling air pump for use on a ship provided in an embodiment of the present application;
[0020] Figure 3 This is a cross-sectional view of the internal structure of a marine low-vibration and noise sampling air pump provided in an embodiment of the present application;
[0021] Figure 4 This is a front view of the linkage mechanism provided according to an embodiment of the present application;
[0022] Figure 5 is a side view of a linkage mechanism provided according to an embodiment of the present application;
[0023] In the figure: 1-motor, 2-first pump body, 3-second pump body, 4-connecting pipe, 5-drive shaft, 6-fixed tailstock, 7-fan, 8-bearing, 9-diaphragm, 10-diaphragm seat, 11-support arm, 12-muffler. DETAILED DESCRIPTION
[0024] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.
[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0026] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.
[0027] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0028] Additionally, the term "plurality" shall mean two or more.
[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0030] like Figure 2-3 As shown, the present application provides a marine low-vibration and noise sampling air pump, comprising a motor 1, a first pump body 2, a second pump body 3, a connecting pipe 4 and a muffler 12, wherein: the first pump body 2 and the second pump body 3 are symmetrically arranged on the left and right sides of the motor 1; one end of the motor 1 is connected to the linkage mechanism inside the chamber of the first pump body 2 through a transmission structure, and the other end is connected to the linkage mechanism inside the chamber of the second pump body 3 through a transmission structure; a connecting pipe 4 is provided between the top end of the first pump body 2 and the top end of the second pump body 3, and the connecting pipe 4 is connected to the external gas channel; the muffler 12 is provided at the outlet end of the connecting pipe 4.
[0031] Specifically, the marine low-vibration and noise sampling vacuum pump provided in the embodiment of the present application is mainly used in radiation protection systems to extract gases from reactor compartments and working compartments and send them to radiation detection devices for processing and analysis, thereby obtaining the radioactivity level in the air of each area and ensuring the radiation safety of personnel. The overall structure adopts a symmetrical double-cavity layout, with the motor 1 set in the middle and a pump body set on the left and right sides respectively. The transmission shaft 5 of the motor 1 is directly connected to the linkage mechanism inside the pump bodies on both sides for driving. Compared with the traditional Y-type structure, the coupling is eliminated, the cantilever state of the motor 1 is changed, and the compactness of the internal structure of the pump body is guaranteed to the maximum extent. While ensuring large displacement (100L / min) and good sealing performance, the vibration noise level can be effectively controlled, and the vibration acceleration of the base foot is reduced by more than 10dB compared with the traditional vacuum pump structure.
[0032] Furthermore, the motor 1 is a dual-shaft motor with a rated power of 0.7 kW, a frequency of 50 Hz, and a voltage of 380 V. The motor 1 has two left and right shafts, and can control the simultaneous operation of the first pump body 2 and the second pump body 3 via two left and right drive shafts 5. This means that the power output, or power source, is located in the center, with the power working units on both sides. Compared to the 80° angled layout of the traditional Y-shaped pump body, this further reduces unbalanced forces.
[0033] Furthermore, the transmission structure includes a fixed tailstock 6, a fan 7, and a bearing 8. The motor drive shaft 5 passes through the bearing 8 and the fan 7 in sequence and is connected to the fixed tailstock 6 on the inner wall of the chamber. The fixed tailstock 6 and the bearing 8 are used to fix the drive shaft 5 of the motor 1, ensuring that the drive shaft 5 can rotate smoothly; the fan 7 is used to accelerate the intake or exhaust of air.
[0034] Further, such as Figure 4-5 As shown, the linkage mechanism includes a diaphragm 9, a diaphragm seat 10, and a support arm 11, wherein: the diaphragm seat 10 is arranged on the top of the support arm 11; the diaphragm 9 is fixed to the diaphragm seat 10 via a pressure plate; the support arm 11 has a circular ring inside, and the entire internal eccentric sleeve is mounted on the drive shaft 5 of the motor 1; the lower part of the support arm 11 is connected to the drive shaft 5 of the motor 1 via a hexagonal bolt. The linkage mechanism is similar to the crank-connecting rod structure. The bottom of the support arm 11 is fixedly connected to the drive shaft 5 via a hexagonal bolt, and the middle ring is mounted on the drive shaft 5 via an eccentric sleeve structure. The support arm 11 can move up and down with the rotation of the drive shaft 5, thereby utilizing the power from the support arm 11 to cause the diaphragm 9 on the diaphragm seat 10 to reciprocate up and down, realizing the suction and exhaust process.
[0035] Furthermore, when working, the motor 1 is started, and the transmission shaft 5 of the motor 1 rotates, driving the support arm 11 to move, thereby causing the diaphragm 9 above the support arm 11 to move up and down, realizing the process of suction and exhaust. In the embodiment of the present application, a double-shaft motor 1 is used as the power source, and the pump body is arranged symmetrically on the left and right. The transmission structure and linkage mechanism inside the two pump bodies are the same, and are both connected to the transmission shaft 5 of the motor 1. The transmission shaft 5 is driven to rotate by the motor 1, and the eccentric structure is used to drive the diaphragm 9 of the linkage mechanism to reciprocate up and down. The diaphragm 9 in the cavity compresses the air to produce a pressure change, thereby achieving the purpose of ultimate suction and exhaust.
[0036] Furthermore, the material of the diaphragm 9 is EPDM, which can improve fatigue resistance and ensure the service life of the diaphragm 9.
[0037] Furthermore, the silencer 12 is a composite micro-perforated silencer. A connecting pipe 4 is provided between the first pump body 2 and the second pump body 3 for connecting to the external gas channel and interacting with the external gas to achieve air intake or exhaust. The silencer 12 is provided at the outlet of the connecting pipe 4 to reduce vibration noise. The entire silencer is a composite micro-perforated silencer, preferably made of a thin plate with a thickness of less than 1 mm, and perforated with a drill bit with an aperture of less than 1 mm on the thin plate, with a perforation rate of 1%-3%. By selecting different perforation rates and cavity depths of different plate thicknesses, the spectrum performance of the silencer 12 can be controlled to achieve a good noise reduction effect within the required frequency range.
[0038] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.
Claims
1. A marine low vibration and noise sampling air pump, characterized in that: It includes a motor, a first pump body, a second pump body, connecting pipes and a muffler, wherein: The first pump body and the second pump body are symmetrically arranged on the left and right sides of the motor; One end of the motor is connected to the linkage mechanism inside the first pump body cavity through a transmission structure, and the other end is connected to the linkage mechanism inside the second pump body cavity through a transmission structure; The connecting pipe is provided between the top end of the first pump body and the top end of the second pump body, and the connecting pipe is connected to the external gas channel; The muffler is arranged at the outlet end of the connecting pipeline.
2. The marine low vibration and noise sampling air pump according to claim 1, characterized in that: The motor is a double-shaft motor with a rated power of 0.7KW, a frequency of 50HZ and a voltage of 380V.
3. The marine low vibration and noise sampling air pump according to claim 2, characterized in that: The transmission structure includes a fixed tailstock, a fan and a bearing. The motor transmission shaft passes through the bearing and the fan in sequence and is connected to the fixed tailstock on the inner wall of the chamber.
4. The marine low vibration and noise sampling air pump according to claim 3, characterized in that: The linkage mechanism includes a diaphragm, a diaphragm seat and a support arm, wherein: The diaphragm seat is arranged on the top of the support arm; The diaphragm is fixed on the diaphragm seat by a pressure plate; The interior of the support arm is annular, and the entire interior is eccentrically sleeved on the transmission shaft of the motor; The lower portion of the support arm is connected to the transmission shaft of the motor via a hexagonal bolt.
5. The marine low-vibration and noise sampling air pump according to claim 4, characterized in that: During operation, the motor is started, the transmission shaft of the motor rotates, and the support arm is driven to move, so that the diaphragm above the support arm moves up and down, realizing the process of pumping and exhausting air.
6. The marine low-vibration and noise sampling air pump according to claim 5, characterized in that: The material of the diaphragm is EPDM rubber.
7. The marine low-vibration and noise sampling air pump according to claim 6, characterized in that: The silencer is a composite micro-perforated silencer.