A noise-reducing screw seal cover for screw compressors

Abstract

This utility model discloses a noise-reducing screw sealing cover for a screw compressor, including a cover body composed of double-layer sound insulation panels. The cover body has several protective doors, each with a sealing strip along its edge. Sound insulation cotton is provided on the inner surface of the protective doors and between the two layers of sound insulation panels. The cover body is equipped with a floating base, which includes an outer frame and an inner support plate. The edge of the inner support plate is connected to the outer frame via several sets of elastic connectors. The four corners of the outer frame are connected and fixed to anchoring seats via traction ropes, keeping the floating base suspended. This utility model, by using a sealing cover composed of double-layer sound insulation panels and sound insulation cotton, effectively absorbs and isolates the airborne noise generated during screw compressor operation. The suspended floating base flexibly suspends the inner support plate carrying the screw compressor on the outer frame via elastic connectors, cutting off the path of vibration propagation along the ground, thereby suppressing the generation and transmission of structural noise.

Description

Technical Field

[0001] This utility model relates to the field of mechanical noise reduction technology, specifically to a noise-reducing screw sealing cover for screw compressors. Background Technology

[0002] Screw compressors are widely used general-purpose mechanical equipment in industrial production. During operation, the high-speed rotation of the motor and main screw, as well as the compression and discharge of gas, generate extremely high levels of mechanical vibration and aerodynamic noise. This noise not only harms the physical and mental health of on-site operators but also constitutes serious noise pollution to the surrounding environment. To reduce the operating noise of screw compressors, the common practice is to install soundproof enclosures or sealed covers. Current soundproof enclosures typically use single or double-layer metal plates filled with sound-absorbing materials, and their main function is to isolate noise transmitted through the air.

[0003] However, traditional soundproof enclosures are typically rigidly mounted directly on the same foundation or ground as screw compressors. The strong vibrations generated during screw compressor operation are transmitted directly to the ground through the base, creating structural sound (i.e., "solid sound"), which then radiates outward through the ground and building structure, creating low-frequency noise pollution. This structural sound travels long distances and has strong penetrating power, which conventional soundproof enclosures cannot prevent, resulting in a significant reduction in overall noise reduction effectiveness.

[0004] Therefore, how to design a screw compressor noise reduction device that can effectively isolate air noise and prevent structural sound transmission by cutting off the vibration propagation path is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The purpose of this utility model is to provide a noise-reducing screw sealing cover for screw compressors. This sealing cover, through a unique floating base design, flexibly suspends and isolates the screw compressor from the ground, effectively cutting off the vibration propagation path. Together with the sound insulation structure of the cover, it achieves a dual suppression effect on air noise and structural noise.

[0006] The technical solution adopted by this utility model to solve the above problems is: a noise-reducing screw sealing cover for a screw compressor, including a cover body, the cover body is composed of double-layer sound insulation panels, the cover body is provided with several protective doors, and the edges of the protective doors are provided with sealing strips. Sound insulation cotton is provided on the inner surface of the protective doors and between the two layers of sound insulation panels. The cover body is provided with a floating base, the floating base includes an outer frame and an inner carrier plate. The edge of the inner carrier plate is connected to the outer frame through several sets of elastic connectors. The four corners of the outer frame are connected and fixed to the anchoring seat through traction ropes to keep the floating base suspended.

[0007] Preferably, the elastic connector includes a connecting hook and a compression spring. The connecting hook includes a straight segment and a curved segment. Fixing blocks are evenly spaced on the inner side of the outer frame. The fixing blocks have through holes that are adapted to slide with the straight segment. The inner carrier plate has hanging holes that are evenly spaced around the circumference and adapted to the curved segment. A stop block is provided at the end of the straight segment. The compression spring is located between the fixing block and the stop block.

[0008] Preferably, the outer frame includes a bottom beam and a base plate set on the bottom beam. The bottom of the bottom beam has a wire embedding groove and the end has a groove. The bottom beams are arranged in a rectangular pattern and there are four sets in total. The grooves at the joints of two adjacent sets of bottom beams form a channel. Each set of bottom beams is equipped with a traction rope. The traction rope is inserted into the wire embedding groove and its two ends pass out from the channel and are connected and fixed to the anchor seat.

[0009] Preferably, the anchoring base includes an anchoring plate fixed to the ground and a fixing head for fixing the traction rope. A screw is provided below the fixing head, and a sleeve that fits the screw is provided on the base plate. An adjusting nut that is screwed to the upper end of the sleeve is rotatably provided. Driving the adjusting nut causes the fixing head and the traction rope, together with the floating base, to move up and down.

[0010] Preferably, at least one set of inner carrier plates is provided inside the outer frame along its length direction, and when there is more than one set of inner carrier plates, a support plate is provided between two adjacent sets of inner carrier plates. Each end of the support plate is provided with a set of hooks that are slidably connected to the fixed block, and the end of the support plate is provided with a sliding groove adapted to the sliding connection of the hooks.

[0011] Preferably, the curved section is provided with a limiting block, the upper end face of which contacts the bottom surface of the inner carrier plate, and the bottom edge of the inner carrier plate is provided with an annular limiting protrusion. The bottom surface of the limiting protrusion is provided with limiting grooves at equal intervals around the circumference, the width of which is adapted to the diameter of the curved section of the connecting hook, in order to limit the horizontal displacement of the inner carrier plate relative to the connecting hook.

[0012] Preferably, the inner wall of the outer frame is provided with a flexible pad for buffering the collision of the inner carrier plate.

[0013] Compared with the prior art, this utility model has the following advantages and effects:

[0014] This invention effectively absorbs and isolates airborne noise generated during screw compressor operation by using a sealed cover composed of double-layer sound insulation panels and sound insulation cotton. Supplemented by a suspended floating base, the inner carrier plate supporting the screw compressor is flexibly suspended from the outer frame via elastic connectors, cutting off the path of vibration propagation along the ground and thus suppressing the generation and transmission of structural noise. This achieves a dual suppression effect of integrated airborne sound insulation and structural vibration isolation, resulting in more comprehensive noise reduction. Furthermore, the inner carrier plate is connected to the outer frame via multiple sets of elastic connectors, achieving multi-point, uniform elastic support and good vibration isolation. The anti-compression springs in the elastic connectors effectively absorb vibration energy. Simultaneously, by setting limiting blocks on the connecting hooks and limiting protrusions and grooves on the inner carrier plate, excessive horizontal displacement of the inner carrier plate is effectively prevented, ensuring the stability of the screw compressor operation. The flexible pads on the inner wall of the outer frame provide a buffer against collisions under extreme operating conditions, improving overall safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a noise-reducing screw sealing cover for a screw compressor according to an embodiment of this utility model.

[0016] Figure 2 This is a structural schematic diagram of the floating base according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the elastic connector according to an embodiment of the present invention.

[0018] Figure 4 This is a magnified view of a portion of the structure at the joint of the two sets of bottom beams of the floating base in an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the end of the bottom beam in an embodiment of this utility model.

[0020] Figure 6 yes Figure 1 A schematic diagram of the anchorage at point A in the middle.

[0021] Figure 7 This is a schematic diagram of the structure of the tray in an embodiment of this utility model.

[0022] Figure 8 yes Figure 2 A schematic diagram of the connection structure between the support plate and the base plate at point B.

[0023] Attached Figures: 1. Cover body; 2. Protective door; 3. Floating base; 31. Outer frame; 311. Bottom beam; 311. Embedded wire groove; 3111. Groove; 3112. Base plate; 312. Fixing block; 313. Inner carrier plate; 32. Hanging hole; 321. Annular limiting protrusion; 322. Limiting groove; 323. Support plate; 331. Hook; 332. Slide groove; 4. Elastic connector; 41. Connecting hook; 41. Straight section; 411. Curved section; 412. Limiting block; 4121. Stop block; 413. Compression spring; 42. Anchor seat; 5. Anchor plate; 51. Fixing head; 52. Screw; 53. Sleeve; 54. Adjusting nut; 55. Traction rope; 6. Flexible pad; 7. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0025] Example:

[0026] See Figure 1 - Figure 8 In this embodiment, a noise-reducing screw 53 sealing cover for a screw compressor is disclosed. Specifically, it is used for noise reduction of a screw 53 type compressor in industrial applications. Specifically, it includes a cover body 1 and a floating base 3 disposed at the bottom of the cover body 1.

[0027] The enclosure 1 is the main component for achieving airborne sound insulation. Its main structure consists of double-layer sound insulation panels (such as steel plates or composite panels). The space between the two layers and the inner wall of the enclosure 1 are filled with sound-absorbing / insulating materials, such as sound-absorbing cotton. To facilitate maintenance and repair of the internal screw compressor, the enclosure 1 is equipped with several protective doors 2. The edges of the protective doors 2 are fitted with sealing strips (made of rubber or silicone) to ensure acoustic sealing when closed and prevent noise leakage. Furthermore, the inner surface of the protective doors 2 is also lined with sound-absorbing cotton.

[0028] Specifically, in this embodiment, the floating base 3 is suspended in mid-air, not in direct contact with the ground, thereby physically cutting off the path of vibration transmission to the ground. The floating base 3 includes an outer frame 31 and at least one inner carrier plate 32. The screw compressor and its related components (not shown in the figure) are directly mounted and fixed on the inner carrier plate 32. The edges of the inner carrier plate 32 are connected to the outer frame 31 by several sets of elastic connectors 4, while the four corners of the outer frame 31 are connected and fixed to the anchor seats 5 by traction ropes 6, keeping the floating base 3 suspended.

[0029] The working principle of this invention is as follows: The screw compressor to be noise-reduced is placed on the inner carrier plate 32 of the floating base 3, and the protective door 2 of the enclosure 1 is closed. When the screw compressor is started, the noise generated during operation is divided into two parts: one part is noise transmitted through the air, which is effectively isolated and absorbed by the sealed enclosure 1 composed of double-layer sound insulation panels and sound insulation cotton; the other part is mechanical vibration, which is transmitted to the inner carrier plate 32 and then to the outer frame 31 through multiple sets of elastic connectors 4. The elastic connectors 4 attenuate the vibration energy during transmission. Furthermore, since the entire floating base 3 is suspended above the ground by traction ropes 6, the weakened residual vibration cannot be transmitted to the ground, thus cutting off the propagation path of structural noise and ultimately achieving a dual suppression effect of airborne and structural noise.

[0030] See Figure 3 In this embodiment, the structure of the elastic connector 4 specifically includes a connecting hook 41 and a compression spring 42. The connecting hook 41 is formed by bending an integrally molded metal rod, and is divided into a straight section 411 and a curved section 412. Several equally spaced fixing blocks 313 are welded or bolted to the inner side of the outer frame 31. Each fixing block 313 has a through hole, the size of which is adapted to slide with the straight section 411 of the connecting hook 41. Several hanging holes 321 are correspondingly opened on the circumferential edge of the inner carrier plate 32 for hooking the curved section 412 of the connecting hook 41. In this embodiment, the inner carrier plate 32 is connected to the outer frame 31 through multiple sets of elastic connectors 4, realizing multi-point and uniform elastic support, with good vibration isolation effect. At the same time, the compression spring 42 in the elastic connector 4 can effectively absorb vibration energy.

[0031] During assembly, the straight segment 411 of the connecting hook 41 passes through the through hole of the fixing block 313, and its end is provided with a stop block 413 (which can be formed by welding or threaded connection) with a diameter larger than the through hole and the anti-compression spring 42, to prevent the straight segment 411 from coming out of the through hole. The anti-compression spring 42 is sleeved on the straight segment 411, with its two ends abutting against the top surface of the fixing block 313 and the bottom surface of the stop block 413, respectively. The curved segment 412 of the connecting hook 41 is hooked into the hanging hole 321 of the inner carrier plate 32. When the screw compressor is placed on the inner carrier plate 32, its weight is transmitted to the connecting hook 41 through the inner carrier plate 32, causing the stop block 413 to press down on the anti-compression spring 42 to put it in a pre-compressed state. The vibration generated by the screw compressor during operation is transmitted through the inner carrier plate 32 and the connecting hook 41, but most of the vibration energy is absorbed and buffered by the elastoplastic deformation of the anti-compression spring 42, thereby attenuating the vibration transmitted to the outer frame 31.

[0032] To suspend and stabilize the entire floating base 3, the outer frame 31 is connected to anchorages 5 fixed to the ground via four traction ropes 6 located at its four corners. See also Figure 2The outer frame 31 consists of four sets of bottom beams 311 and a base plate 312 laid on the bottom beams 311. The four sets of bottom beams 311 are arranged in a rectangular frame shape. See also Figure 4 and Figure 5 Each set of bottom beams 311 has a wire embedding groove 3111 at its bottom for embedding and positioning the traction rope 6 to prevent it from coming out. Furthermore, each set of bottom beams 311 has a groove 3112 at the end of the splice. The two grooves 3112 are spliced ​​together to form a channel through which the two ends of the traction rope 6 pass and connect upward to the anchor seat 5.

[0033] See Figure 6 In this embodiment, the anchoring base 5 includes an anchoring plate 51 fixed to the ground by anchor bolts and a fixing head 52 for clamping the end of the traction rope 6. A screw 53 is provided below the fixing head 52. A sleeve 54 is vertically provided on the base plate 312 on the ground, and an adjusting nut 55 is rotatably provided on the upper end of the sleeve 54 (via a thrust bearing). The adjusting nut 55 and the screw 53 are connected by a threaded engagement. When it is necessary to adjust the height of the floating base 3, simply use a tool (such as a wrench) to turn the adjusting nut 55. The adjusting nut 55 will drive the screw 53, together with the fixing head 52 and the traction rope 6, to move up and down. This, in conjunction with a level, allows for the adjustment of the height of the entire floating base 3, while keeping the floating base 3 suspended and not touching the ground.

[0034] To further improve stability in use, this utility model also includes the following optimized designs:

[0035] See Figure 4 To prevent excessive horizontal swaying of the inner carrier plate 32 under strong vibration, a limiting block 4121 is provided on the curved section 412 of the connecting hook 41. The upper end face of the limiting block 4121 contacts the bottom surface of the inner carrier plate 32, providing vertical support. Simultaneously, a ring-shaped limiting protrusion 322 is provided around the bottom edge of the inner carrier plate 32, with several limiting grooves 323 evenly spaced circumferentially on the bottom surface of the protrusion. The width of the limiting grooves 323 is adapted to the diameter of the rod of the curved section 412 of the connecting hook 41. During installation, the curved section 412 fits precisely into the limiting grooves 323, effectively limiting the horizontal displacement of the inner carrier plate 32 relative to the connecting hook 41. Furthermore, flexible pads 7, such as rubber buffer blocks, are adhered and fixed to the inner wall of the outer frame 31, especially in areas that may contact the edge of the inner carrier plate 32. When the inner carrier plate 32 undergoes a large displacement due to accidental impact or extreme vibration and crashes into the outer frame 31, the flexible pad 7 can act as a buffer to avoid noise and structural damage caused by rigid collision.

[0036] For large or extra-long screw compressors, their weight and size may exceed the load-bearing capacity of a single inner carrier plate 32 (excessive plate length can easily cause bending deformation). The solution of this utility model has good scalability. For example... Figure 2 As shown, two or more sets of inner carrier plates 32 can be arranged along the length of the outer frame 31. A support plate 33 is arranged between two adjacent sets of inner carrier plates 32. See also Figure 7 and Figure 8 The two ends of the pallet 33 are slidably connected to the fixing block 313 on the outer frame 31 via hooks 331. The end of the pallet 33 is provided with a sliding groove 332 that is adapted to the sliding connection of the hooks 331, providing support for the area between the inner carrier plates 32 and ensuring the rigidity and stability of the entire bearing platform (composed of several sets of inner carrier plates 32 and pallets 33).

[0037] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A noise-reducing screw sealing cover for a screw compressor, comprising a cover body, the cover body being composed of double-layer sound insulation panels, the cover body being provided with a plurality of protective doors, and sealing strips being provided at the edges of the protective doors; sound insulation cotton is provided on the inner surface of the protective doors and between the two layers of sound insulation panels, characterized in that, The cover is equipped with a floating base, which includes an outer frame and an inner carrier plate. The edge of the inner carrier plate is connected to the outer frame through several sets of elastic connectors. The four corners of the outer frame are connected and fixed to the anchoring seat through traction ropes to keep the floating base suspended.

2. The noise-reducing screw sealing cover for a screw compressor according to claim 1, characterized in that: The elastic connector includes a connecting hook and a compression spring. The connecting hook includes a straight segment and a curved segment. Fixing blocks are evenly spaced on the inner side of the outer frame. The fixing blocks have through holes that are adapted to slide with the straight segment. The inner carrier plate has hanging holes that are evenly spaced around the circumference and adapted to the curved segment. A stop block is provided at the end of the straight segment. The compression spring is located between the fixing block and the stop block.

3. The noise-reducing screw sealing cover for a screw compressor according to claim 1, characterized in that: The outer frame includes a bottom beam and a base plate set on the bottom beam. The bottom of the bottom beam has a wire embedding groove and the end has a groove. The bottom beams are arranged in a rectangular pattern and there are four sets in total. The grooves at the joints of two adjacent sets of bottom beams form a channel. Each set of bottom beams is equipped with a traction rope. The traction rope is inserted into the wire embedding groove and its two ends pass out from the channel and are connected and fixed to the anchor seat.

4. The noise-reducing screw sealing cover for a screw compressor according to claim 1, characterized in that: The anchoring base includes an anchoring plate fixed to the ground and a fixing head for fixing the traction rope. A screw is set below the fixing head, and a sleeve that fits the screw is set on the base plate. An adjusting nut that is screwed to the upper end of the sleeve is rotatably set. Driving the adjusting nut causes the fixing head and the traction rope, together with the floating base, to move up and down.

5. A noise-reducing screw sealing cover for a screw compressor according to claim 2, characterized in that: The outer frame has at least one set of inner carrier plates along its length. When there is more than one set of inner carrier plates, a support plate is provided between two adjacent sets of inner carrier plates. Each end of the support plate is provided with a set of hooks that are slidably connected to the fixed block, and the end of the support plate is provided with a sliding groove adapted to the sliding connection of the hooks.

6. A noise-reducing screw sealing cover for a screw compressor according to claim 2, characterized in that: The curved section is provided with a limiting block, the upper end face of which contacts the bottom surface of the inner carrier plate. The bottom edge of the inner carrier plate is provided with an annular limiting protrusion, and the bottom surface of the limiting protrusion is provided with limiting grooves at equal intervals around the circumference. The width of the groove is adapted to the diameter of the curved section of the connecting hook, which is used to limit the horizontal displacement of the inner carrier plate relative to the connecting hook.

7. The noise-reducing screw sealing cover for a screw compressor according to claim 1, characterized in that: The inner wall of the outer frame is provided with a flexible pad for buffering the collision of the inner carrier plate.

Images