Damping structure of reciprocating compressor

Abstract

The utility model discloses a damping structure of a reciprocating compressor, which belongs to the technical field of refrigeration compressors, and comprises a plurality of inner calandria fixing frames, the plurality of inner calandria fixing frames are arranged on a mounting seat, a plurality of positioning buckles are arranged on the bottom surface of the mounting seat, and a matching buckle is arranged on one side close to an anti-collision point; a fixing hole is formed in the inner calandria fixing frame in a penetrating mode, the top end of the fixing hole is open, the matching buckle and the anti-collision point are matched for positioning, and a barb is arranged at the bottom end of the positioning buckle and fixed to the crankcase. Fixing of the inner discharge pipe and the pump body structure is achieved, vibration of the inner discharge pipe relative to the pump body is greatly reduced, the modal characteristic of the inner discharge pipe is improved, the situation that the inner discharge pipe is broken is avoided, and noise is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration compressor technical field, concretely relates to a damping structure of reciprocating compressor. BACKGROUND

[0002] The vibration of the inner discharge pipe in the refrigeration compressor is an important source of the vibration noise of the whole machine, and the influence of the pipeline on the noise mainly reflects in the pipeline resonance and the fluid-structure coupling problem of the fluid in the pipeline, and the research on the pipeline resonance is the key direction to solve the noise problem. The natural frequency of the inner discharge pipe with the same structure in the compressor is also relatively fixed, which is difficult to adapt to various frequency working conditions, and the inner discharge pipe resonance can produce a large amount of vibration noise and even cause the fatigue fracture of the inner discharge pipe, which seriously affects the reliability of the compressor.

[0003] Chinese patent publication number: CN205779565U, publication date: December 7, 2016, discloses a Chinese patent named a refrigeration compressor sound attenuation chamber and rack combination, which has a rack, the front section outlet and the rear section inlet of the compressor discharge pipe are connected to one side and the other side of the rack respectively, and a bridge type sound attenuation chamber is connected between the front section outlet and the rear section inlet of the discharge pipe. The discharge pipe of the compressor does not have a fixed damping structure, which is easy to produce a large amount of vibration noise and even cause the fatigue fracture of the inner discharge pipe. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of damping structure of reciprocating compressor, by setting inner discharge pipe fixing frame and positioning structure, inner discharge pipe and pump body assembly are fixed together, reduce the relative vibration of inner discharge pipe and pump body, improve the fracture of inner discharge pipe and the vibration noise problem of compressor.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a kind of damping structure of reciprocating compressor, including several inner discharge pipe fixing frames, several inner discharge pipe fixing frames are set on mounting seat, the bottom surface of mounting seat is equipped with several positioning buckles, and the side close to anti-collision point is equipped with cooperation buckle;Inner discharge pipe fixing frame is provided with fixed hole, and the top end of fixed hole is opened, and cooperation buckle and anti-collision point are positioned in cooperation, and the bottom end of positioning buckle is equipped with barb and fixed on crankcase. The damping structure is fixed in the corner of compressor crankcase by buckle structure, so as to realize the fixation of inner discharge pipe and pump body structure, greatly reduce the vibration of inner discharge pipe relative to pump body, improve the modal characteristics of inner discharge pipe, avoid the fracture of inner discharge pipe.

[0006] Preferably, several inner row pipe fixing frames are arranged in parallel on the mounting seat, and the inner row pipe is fixed in the fixing hole. The inner row pipe fixing frame fixes the easy-to-break part of the compressor inner row pipe through two parallel fixing clamps. The relative vibration of the inner row pipe is reduced, resonance of the inner row pipe is avoided, and fatigue fracture is prevented. Therefore, the service life and reliability of the inner row pipe are significantly improved, and the equipment maintenance cost and downtime are reduced.

[0007] Preferably, the mounting seat is provided with a stepped portion, and several inner row pipe fixing frames are arranged on the high-order portion and the low-order portion respectively. The design of the stepped portion can arrange the inner row pipe fixing frames in layers, which can provide space for other components of the compressor. This layered structure not only improves the space utilization, but also further enhances the fixing effect, ensuring the stability of the compressor during operation.

[0008] Preferably, a matching buckle is arranged on one side of the high-order portion, and a slope portion is arranged between the high-order portion and the low-order portion. The cross section of the slope portion is a right triangle, the top end is arranged on the side of the high-order portion, and the lower surface is fixed on the low-order portion. The slope portion structure of the right triangle can disperse external force, reduce the impact of collision or vibration on the fixing structure, improve the stability and reliability of the device, and facilitate installation and disassembly.

[0009] Preferably, a guide portion is arranged on both sides of the opening of the inner row pipe fixing frame, and the guide portion is arranged inwardly inclined. The inner row pipe is pressed into the fixing frame through the guide portion of the inner row pipe fixing frame, and is fixed together with the shock-absorbing structure through the limiting of the fixing hole of the inner row pipe fixing frame. The design of the guide portion makes the inner row pipe more smoothly press into the fixing frame, reducing friction and resistance during installation. The inner row pipe is tightly fixed with the shock-absorbing structure through the limiting of the fixing hole, ensuring that the inner row pipe will not loosen or shift during operation, further improving the stability and reliability of the inner row pipe, and reducing damage caused by vibration.

[0010] Preferably, the hole centers of the fixing holes of the several inner row pipe fixing frames are located on the same horizontal line, which can ensure that the inner row pipe is evenly stressed during fixing, and avoid local stress concentration caused by uneven stress. This design helps to further reduce the vibration and fatigue fracture risk of the inner row pipe, improve the service life and operation stability of the inner row pipe.

[0011] Preferably, several positioning buckles are arranged at the corners of the mounting seat, and are arranged in central symmetry. The structure of the positioning buckle will automatically deform elastically during installation, and will automatically recover and clamp when installed in place. The shock-absorbing structure is fixed together with the crankcase through the four positioning buckles. The central symmetric design and elastic deformation characteristics of the positioning buckle enable the shock-absorbing structure to be quickly and accurately installed on the crankcase and achieve automatic fixing and clamping. This design not only improves the installation efficiency, but also ensures the firm and reliable connection between the shock-absorbing structure and the crankcase, reducing the problem of looseness or falling caused by improper installation.

[0012] Preferably, the barbs are triangular, and the barbs are all arranged inward. The positioning buckle facilitates the device to be installed from top to bottom on the crankcase and to be automatically fixed and clamped. The inner row pipe fixed by the damping device can avoid the inner row pipe from rubbing the shell and the crankcase due to machining problems, and simplify the straightening process. The triangular barb design can provide stronger grip and stability, ensuring that the device does not loosen after installation.

[0013] Preferably, the matching buckle is an arc-shaped groove, and the shape is matched with the anti-collision point. The matching buckle can be matched with the anti-collision point of the crankcase to facilitate the installation of the device and improve the fixing strength. The matching of the arc-shaped groove of the matching buckle and the anti-collision point can achieve more accurate positioning and more stable fixing. This design not only facilitates the installation of the device, but also improves the fixing strength, reduces the displacement or loosening of the device caused by external force, and further improves the running stability of the equipment.

[0014] Preferably, the height of the inner row pipe fixing frame located at the high-order part is lower than the height of the inner row pipe fixing frame located at the low-order part. The top ends of the plurality of inner row pipe fixing frames are located on the same horizontal plane. This height design can ensure that the top ends of inner row pipes of different heights remain on the same horizontal plane after being fixed, further improving the stability and consistency of the inner row pipes. This design helps to reduce the vibration and shaking of the inner row pipes during operation, improving the overall operation performance and reliability of the equipment.

[0015] The beneficial effects of the utility model are as follows: (1) the inner row pipe and the pump body assembly are fixed, the inner row pipe mode is improved, resonance is avoided, and noise is reduced; (2) the problem of inner row pipe fracture is effectively avoided; (3) the structure is easy to install, the position of the inner row pipe is fixed, and the inner row pipe is prevented from rubbing the machine core and the shell. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the utility model.

[0017] Figure 2 is a structural schematic view of the utility model.

[0018] Mark: 1: inner row pipe fixing frame; 1.1: fixing hole; 1.2: opening; 1.3: guide part; 2: mounting seat; 2.1: high-order part; 2.2: low-order part; 2.3: slope part; 3: matching buckle; 4: positioning buckle; 4.1: barb. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] In the operation process of the reciprocating compressor, the relative vibration between the inner discharge pipe and the pump body has been a key problem bothering the stability and service life of the equipment. The traditional reciprocating compressor often breaks due to the vibration of the inner discharge pipe, which not only increases the equipment maintenance cost, but also may cause serious production accidents. At the same time, the vibration noise generated during the operation of the compressor also causes adverse effects on the working environment. The damping structure of the reciprocating compressor of the utility model effectively solves these problems through innovative design, and significantly improves the performance and reliability of the reciprocating compressor.

[0021] As shown in Figure 1 The damping structure mainly comprises inner discharge pipe fixing frames 1, mounting seats 2 and a series of positioning and buckle structures. The mounting seats 2 are provided with positioning buckles 4 on the bottom surface and are provided with cooperating buckles 3 near the anti-collision point side. The inner discharge pipe fixing frames 1 are provided with fixing holes 1.1, and through the cooperative action of these structures, the inner discharge pipe and the pump body assembly are tightly fixed, and the vibration of the inner discharge pipe relative to the pump body is greatly reduced.

[0022] As shown in Figure 1 A plurality of inner discharge pipe fixing frames 1 are arranged in parallel on the mounting seat 2, and this layout can uniformly fix the inner discharge pipe of the compressor. In actual application, the installation position of the inner discharge pipe fixing frame 1 is determined by accurately measuring the position of the easily broken part of the inner discharge pipe. For example, in a certain type of reciprocating compressor, through analysis of the equipment operation data and on-site observation, it is found that the pipe near the outlet of the pump body has a large vibration amplitude during operation and is prone to fatigue fracture. Therefore, two inner discharge pipe fixing frames 1 are installed in parallel at the corresponding position of the mounting seat 2, which are specially used to fix this easily broken part. The inner discharge pipe fixing frame 1 fixes the inner discharge pipe through two parallel distributed fixing clamps, which can effectively reduce the relative vibration of the inner discharge pipe and avoid resonance of the inner discharge pipe. In the simulation experiment, the vibration amplitude of the inner discharge pipe during the operation of the compressor without installing the damping structure can reach ±5mm, and after installing the damping structure, the vibration amplitude is reduced to within ±1mm, which significantly reduces the risk of fatigue fracture of the inner discharge pipe due to vibration, thereby improving the service life and reliability of the inner discharge pipe, reducing the equipment maintenance cost and downtime.

[0023] AsFigure 1 and Figure 2 As shown, the design of the fixing holes 1.1 of the inner pipe fixing bracket 1 is also crucial. The top opening 1.2 of the fixing hole 1.1 facilitates the installation of the inner pipe. The centers of the fixing holes 1.1 of several inner pipe fixing brackets 1 are located on the same horizontal line. This design ensures that the inner pipe is subjected to uniform force during fixing. When the compressor is running, the inner pipe is subjected to various forces such as gas pressure and mechanical vibration. If the centers of the fixing holes 1.1 are not on the same horizontal line, the inner pipe will experience uneven force at the fixing point, leading to localized stress concentration. For example, in one experiment, the center of the fixing holes 1.1 was set with a certain deviation, and after the compressor had been running for a period of time, the inner pipe showed obvious deformation and cracks at the fixing point. However, when the centers of the fixing holes 1.1 are on the same horizontal line, the inner pipe can be subjected to uniform force during operation, effectively avoiding localized stress concentration, further reducing the risk of vibration and fatigue fracture of the inner pipe, and improving the service life and operational stability of the inner pipe.

[0024] like Figure 1 and Figure 2 As shown, the mounting base 2 has a stepped section, with several inner pipe fixing brackets 1 respectively installed on the higher step 2.1 and the lower step 2.2. The stepped design offers multiple advantages. It allows for layered installation of the inner pipe fixing brackets 1, making room for other compressor components. Inside a reciprocating compressor, space is very compact, with various components intertwined. The stepped design allows for efficient use of limited space, improving space utilization. For example, in a large reciprocating compressor, due to its complex internal structure, the installation space for some pipes and components is limited. The stepped design of the mounting base 2, which layers the inner pipe fixing brackets 1, successfully solves the space shortage problem and further enhances the fixing effect. During compressor operation, the layered inner pipe fixing brackets 1 better distribute the stress on the inner pipes, ensuring compressor stability.

[0025] like Figure 2 As shown, a buckle 3 is positioned on one side of the higher-level section 2.1, and a ramp section 2.3 is provided between the higher-level section 2.1 and the lower-level section 2.2. The ramp section 2.3 has a right-angled triangular cross-section, with its apex positioned on the side of the higher-level section 2.1 and its lower surface fixed to the lower-level section 2.2. This right-angled triangular ramp section 2.3 structure has excellent mechanical properties; it can disperse external forces and reduce the impact of collisions or vibrations on the fixed structure. When the compressor is subjected to external impacts or impacts generated by its own vibrations during operation, the ramp section 2.3 can disperse the impact force along the ramp, reducing the local pressure on the fixed structure. In actual tests, under the same impact force, the fixed structure without the ramp section 2.3 showed significant deformation, while the fixed structure with the ramp section 2.3 remained intact.

[0026] As shown in Figure 1 the bottom surface of the mounting seat 2 is provided with a plurality of positioning buckles 4, and four positioning buckles 4 are preferably arranged in this embodiment. The bottom end of the positioning buckle 4 is provided with a barb 4.1. When installing the damping structure, align the positioning buckle 4 with the corresponding position on the crankcase, and then press the mounting seat 2 firmly, so that the barb 4.1 at the bottom end of the positioning buckle 4 is firmly fixed on the crankcase. This barb 4.1 design can provide strong fixing force, and ensure that the damping structure will not loosen during the operation of the compressor. In actual application, through long-term operation monitoring, the damping structure with this positioning buckle 4 and barb 4.1 structure has never appeared the fixed failure caused by loosening, which ensures the stable connection between the inner pipe and the pump body structure.

[0027] As shown in Figure 1 a cooperating buckle 3 is arranged near the anti-collision point side, and the cooperating buckle 3 and the anti-collision point are cooperatively positioned. During installation, first fix the positioning buckle 4 on the crankcase, and then adjust the position of the mounting seat 2 to make the cooperating buckle 3 accurately cooperate with the anti-collision point. This cooperative positioning method can further improve the accuracy and stability of the installation of the damping structure. For example, in the installation process of a certain reciprocating compressor, through the cooperative positioning of the cooperating buckle 3 and the anti-collision point, the installation error of the damping structure is controlled within a very small range, which ensures the relative position accuracy between the inner pipe and the pump body, and effectively reduces the vibration of the inner pipe.

[0028] As shown in Figure 1 the opening 1.2 of the inner pipe fixing frame 1 is provided with a guide part 1.3 at both sides of the wall, and the guide part 1.3 is inclined inward. When installing the inner pipe, the maintenance personnel slowly press the inner pipe into the fixing frame along the guide part 1.3. The inclined design of the guide part 1.3 makes the inner pipe more smoothly press into the fixing frame, reducing the friction and resistance in the installation process. In actual installation operation, the use of the guide part 1.3 design reduces the installation time. The inner pipe is tightly fixed with the damping structure through the limiting of the fixing hole 1.1, which ensures that the inner pipe will not loosen or shift during operation. In many simulation operation experiments, the inner pipe installed through the guide part 1.3 still maintains good fixed state after long-time operation of the compressor, which further improves the stability and reliability of the inner pipe and reduces the damage caused by vibration.

[0029] As shown in Figure 1As shown, several positioning buckles 4 are respectively arranged at the corners of the mounting seat 2, and are arranged in a central symmetry. This layout fully considers the convenience and stability of installation. During the installation process, the positioning buckles 4 exhibit unique elastic deformation characteristics. When the mounting seat 2 approaches the crankcase, the positioning buckles 4 contact the surface of the crankcase and are extruded, and the elastic material inside the positioning buckles 4 begins to elastically deform. Preferably, the positioning buckles 4 are made of special rubber and metal composite materials. When extruded by external force, the rubber part can produce a large elastic deformation, and the metal skeleton ensures the overall structural strength of the buckle. As the mounting seat 2 further approaches the crankcase, the positioning buckles 4 continue to deform until they are installed in place. At this time, the positioning buckles 4 automatically recover and clamp under the action of elastic restoring force, firmly fixing the damping structure on the crankcase. Through the four positioning buckles 4, the damping structure and the crankcase are stably connected. In many simulated installation experiments, the positioning buckles 4 with this central symmetric design shorten the average installation time and greatly improve the installation efficiency. At the same time, due to the precise positioning and automatic clamping function of the positioning buckles 4, the problem of loosening or falling due to improper installation is effectively reduced, ensuring the firmness and reliability of the connection between the damping structure and the crankcase.

[0030] As shown in Figure 1 The barb 4.1 is triangular, and a plurality of barbs 4.1 are arranged inward. The design of the triangular barb 4.1 is the key to ensuring installation stability. During the installation process, when the positioning buckle 4 elastically deforms and clamps into the pre-set position of the crankcase, the triangular barb 4.1 can exert strong grip. The structural characteristics of the triangular shape enable it to evenly disperse the force when stressed, thereby providing stronger fixing effect. In the pull force test of different shaped barbs 4.1, the maximum pull force that the triangular barb 4.1 can withstand is higher than that of the circular barb 4.1. When the compressor is running, vibration is inevitable, and the triangular barb 4.1 can tightly grasp the surface of the crankcase to prevent the damping structure from loosening due to vibration. In addition, the positioning buckle 4 facilitates the installation of the device from top to bottom on the crankcase and realizes automatic fixed clamping, and the inner row pipe fixed by the damping device can avoid the inner row pipe from rubbing the shell and the crankcase due to processing problems, simplifying the pipe straightening process. In actual production, after using the damping structure, the equipment failure rate caused by the inner row pipe rubbing problem is reduced, greatly improving the reliability and operation stability of the equipment.

[0031] As shown in Figure 1As shown, the matching buckle 3 is an arc-shaped groove, and its shape is matched with the anti-collision point. During installation, the matching buckle 3 plays an important role in positioning and enhancing the fixing strength. When the positioning buckle 4 of the damping structure is preliminarily fixed on the crankcase, accurate adjustment of the position of the damping structure is needed, and at this time, the matching function of the matching buckle 3 and the anti-collision point is particularly important. Because the arc-shaped groove shape of the matching buckle 3 is accurately matched with the anti-collision point, when adjusting the position of the damping structure, the installer can quickly and accurately adjust the damping structure to the best position by observing the matching degree of the matching buckle 3 and the anti-collision point. This design greatly improves the accuracy and efficiency of installation.

[0032] The matching design of the matching buckle 3 and the anti-collision point not only facilitates device installation, but also significantly improves the fixing strength. When the compressor is running, it will be affected by various external forces, such as vibration, airflow impact, etc. Under the influence of these external forces, the damping structure may be displaced or loose. The matching buckle 3 and the anti-collision point are closely matched, which can effectively resist these external forces.

[0033] The height of the inner row pipe fixing frame 1 located in the high-order part 2.1 is lower than the height of the inner row pipe fixing frame 1 located in the low-order part 2.2, and the top ends of several inner row pipe fixing frames 1 are located on the same horizontal plane. This unique height design is to better adapt to the fixing needs of inner row pipes at different positions, while ensuring the stability and consistency of the inner row pipes after being fixed. In the reciprocating compressor, the trajectories and positions of the inner row pipes are different, and by adjusting the height of the inner row pipe fixing frame 1, the top ends of inner row pipes of different heights can be kept on the same horizontal plane after being fixed. In actual installation, for an inner row pipe located at a higher position, a higher fixing frame located in the low-order part 2.2 is used for fixation; while for an inner row pipe located at a lower position, a lower fixing frame located in the high-order part 2.1 is used for fixation. Such design can ensure that the inner row pipes are uniformly stressed after being fixed, avoiding vibration and shaking caused by uneven stress of the inner row pipes due to unreasonable height of the fixing frame.

[0034] Installation process: When installing this damping structure, first clean the crankcase to ensure that the installation position is clean and free of debris. Then align the positioning buckle 4 on the bottom surface of the mounting seat 2 with the pre-set position on the crankcase, press the mounting seat 2 firmly, and make the barb 4.1 at the bottom end of the positioning buckle 4 firmly fixed on the crankcase. Then, adjust the position of the mounting seat 2 to make the matching buckle 3 accurately match with the anti-collision point. After that, slowly press the inner row pipe into the fixing hole 1.1 of the inner row pipe fixing frame 1 along the guide part 1.3 of the two side walls of the opening 1.2 of the inner row pipe fixing frame 1, and ensure that the inner row pipe is firmly installed. During installation, use professional measuring tools to check the installation position and fixing effect of the inner row pipe to ensure that the installation position of the inner row pipe is accurate.

[0035] Maintenance process: During daily maintenance, check the fixing of the positioning buckle 4 and the matching buckle 3 regularly to see if there is looseness or damage. If the buckle is loose, tighten it in time; if the buckle is damaged, replace it with a new one. At the same time, check the fixing of the inner tube fixing frame 1 and the inner tube to see if the inner tube is loose or displaced. If the inner tube is loose, adjust the fixing; if the inner tube fixing frame 1 is deformed or damaged, replace it with a new one. In addition, regularly monitor the running state of the compressor, measure the vibration of the inner tube through vibration sensors and other equipment to ensure that the vibration of the inner tube is within the normal range.

[0036] The damping structure of the reciprocating compressor of the utility model, through a series of careful design of positioning buckle 4, barb 4.1, matching buckle 3 and inner tube fixing frame 1 height, realizes the effective fixing of the inner tube and the pump body assembly, significantly improves the modal of the inner tube, avoids the resonance and fracture problem, and improves the installation efficiency and equipment running stability.

[0037] Obviously, the above embodiments are only examples for clearly illustrating, not limiting the embodiments. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A damping structure of a reciprocating compressor, characterized in that, a plurality of inner pipe fixing frames are arranged on a mounting base, the bottom surface of the mounting base is provided with a plurality of positioning buckles, and the side close to the anti-collision point is provided with a matching buckle; the inner pipe fixing frame is provided with a fixing hole, the top end of the fixing hole is open, the matching buckle and the anti-collision point are matched and positioned, and the bottom end of the positioning buckle is provided with a barb fixed on the crankcase.

2. The damping structure of a reciprocating compressor according to claim 1, wherein The plurality of inner pipe fixing frames are arranged in parallel on the mounting base, and the inner pipe is fixed in the fixing hole.

3. The damping structure of a reciprocating compressor according to claim 1, wherein The mounting base is provided with a stepped portion, and the plurality of inner pipe fixing frames are arranged on the high step portion and the low step portion, respectively.

4. The damping structure of a reciprocating compressor according to claim 3, wherein The matching buckle is arranged on one side of the high step portion, and a slope portion is arranged between the high step portion and the low step portion.

5. The damping structure of a reciprocating compressor according to claim 1 or 2, wherein The guiding portion is arranged on the two side walls of the opening of the inner pipe fixing frame, and the guiding portion is arranged inwardly inclined.

6. The damping structure of a reciprocating compressor according to claim 5, wherein The hole centers of the fixing holes of the plurality of inner pipe fixing frames are located on the same horizontal line.

7. The damping structure of a reciprocating compressor according to claim 1, wherein The plurality of positioning buckles are arranged at the corners of the mounting base in a central symmetric manner.

8. The damping structure of a reciprocating compressor according to claim 1, wherein The barb is triangular, and the plurality of barbs are arranged inwardly.

9. The damping structure of a reciprocating compressor according to claim 1 or 4, wherein The matching buckle is an arc-shaped groove, and the shape is matched with the anti-collision point.

10. The damping structure of a reciprocating compressor according to claim 1 or 3, wherein The height of the inner pipe fixing frame located on the high step portion is lower than the height of the inner pipe fixing frame located on the low step portion.

Images