Large-volume diaphragm compressor with movable connecting rod

Abstract

The invention discloses a movable connecting rod large-volume diaphragm compressor which is mainly composed of a diaphragm A, a cover plate A, an elastic sealing gasket, a supporting plate A, a left novel movable connecting rod front portion, a movable connecting pin, a left novel movable connecting rod rear portion, a right novel movable connecting rod, a swing rod, a swing rod installation structure and the like. Due to the novel technical structure of the large-volume diaphragm compressor with the movable connecting rod, the elastic sealing gasket technology and the novel movable connecting rod technology, the problems that a diaphragm cavity is small in volume and low in efficiency, and a diaphragm is damaged are solved, and the problem that a crosshead pin is abraded is solved; the problems of stress concentration of threads at the end of the piston rod and fatigue crack of the threads are solved, energy is saved, the service life of the diaphragm compressor is prolonged, and remarkable progress of the diaphragm compressor technology is achieved.

Description

Technical Field

[0001] This invention relates to compressors, and more particularly to a newly invented large-capacity diaphragm compressor with a movable connecting rod. Background Technology

[0002] Figure 1 This is a schematic diagram of the existing diaphragm compressor drive structure. (For example...) Figure 1 As shown, the main structure of an existing diaphragm compressor includes a diaphragm 1, a cover plate 2, a support plate 3, a hydraulic cylinder 4, a piston 5, a piston pin 6, a diaphragm 7, sealing packing 8, a piston rod 9, a crosshead 10, a crosshead pin 11, a connecting rod 12, a crankshaft 13, and a crankcase 14. When the diaphragm compressor is working, the power unit drives the crankshaft 13 to rotate, which in turn drives the connecting rod 12, which in turn drives the crosshead 10 via the crosshead pin 11. Through the piston rod 9 and piston pin 6, the piston 5 reciprocates within the hydraulic cylinder 4, performing compression work. The reaction force P generated by the compression work is transmitted through the piston 5, piston pin 6, piston rod 9, crosshead 10, crosshead pin 11, and connecting rod 12 to the compressor crankshaft 13, consuming the compressor's power. In this type of transmission structure, the diaphragm compressor crankshaft 13 bears all the reaction force P during the compression process, consuming a large amount of energy. When piston 5 compresses the liquid, the liquid enters the diaphragm cavity through oil guide hole 15. At the opening of oil guide hole 15, resistance increases the reaction force P, wasting energy. This type of diaphragm compressor, besides being energy-inefficient, has a complex structure, many parts, high cost, difficult sealing, large leakage, and poor quality. This severely affects the service life of the diaphragm compressor, increases its power consumption, and wastes energy. The function of the diaphragm compressor cylinder is performed by the diaphragm cavity. The size of the diaphragm cavity directly affects the working efficiency of the diaphragm compressor; a small cavity volume results in low efficiency, while a large cavity volume results in high efficiency. Increasing the diaphragm cavity volume of the diaphragm compressor is a key technical issue. Because the periphery of diaphragm 1 is fastened between cover plate 2 and support plate 3, the flow rate of the diaphragm compressor is entirely met by the flexural deformation of diaphragm 1. However, the deformation of diaphragm 1 is limited, and the small amount of gas processed restricts the working efficiency of the diaphragm compressor. How to increase the diaphragm cavity volume of the diaphragm compressor to improve its working efficiency is a significant technical problem. Because the periphery of diaphragm 1 is fastened between cover plate 2 and support plate 3, repeated bending and deformation of diaphragm 1 causes bending and deformation damage at the junction of diaphragm 1 and cover plate 2 and support plate 3, severely affecting the service life of the diaphragm compressor. Poor lubrication conditions at crosshead pin 11 make wear difficult to prevent, affecting the precise straightness of piston rod 9 movement. Fatigue cracking accidents frequently occur at the threaded end of piston rod 9 at the threaded end of crosshead 10, severely affecting the compressor's service life. This also increases the compressor's power consumption and wastes energy.

[0003] Background Technology Figure 1The existing diaphragm compressor drive structure suffers from several drawbacks: high energy consumption, lack of energy efficiency, complex structure leading to high cost and poor quality, small diaphragm cavity volume resulting in low efficiency, diaphragm damage due to bending and deformation, poor lubrication at the crosshead pin making wear difficult to prevent, and frequent fatigue cracking at the piston rod threaded end of the crosshead. These serious defects and significant technical problems severely impact the use of diaphragm compressors. To address these issues, the present invention aims to provide a large-capacity diaphragm compressor with a unique, technologically advanced, and durable diaphragm structure, featuring a moving connecting rod design that significantly improves energy efficiency. This large-capacity diaphragm compressor solves the serious product defects and significant technical problems of existing diaphragm compressors. It provides a product with a unique, technologically advanced, and durable diaphragm structure that fundamentally solves the problem of unavoidable severe stress concentration at the piston rod thread and the frequent fatigue cracking at the threaded connection. The invention of the new technology for large-capacity diaphragm compressors with movable connecting rods has opened a new chapter in the history of diaphragm compressors. Summary of the Invention

[0004] This world-first invention of a new technology for a large-capacity diaphragm compressor with a movable linkage breaks through the structure of existing diaphragm compressors, creating a completely innovative new product. This new technology features an elastic sealing gasket tightly fitted around the diaphragm, with a cover plate above and a support plate below. The diaphragm periphery only contacts the elastic sealing gasket, remaining isolated from the cover plate and support plate. When the diaphragm flexes and deforms, the periphery does not contact the cover plate and support plate, preventing bending and deformation damage at the joint and extending the service life of the diaphragm compressor. Increasing the thickness of the elastic sealing gasket increases the diaphragm cavity volume, meeting the volumetric flow requirements of the diaphragm compressor and improving its efficiency. Due to the role of the swing rod, the swing rod mounting structure, the novel movable linkage, and the connecting pin in the structure of the large-capacity diaphragm compressor with a movable linkage, the assembly position of the connecting rod in existing diaphragm compressors has been changed. A novel movable linkage composed of a new front part, a movable connecting pin, and a new rear part has been invented. This design solves the problem of poor lubrication conditions at the crosshead pin, which makes wear difficult to prevent, and addresses the frequent fatigue cracking at the threaded end of the piston rod at the crosshead. Replacing the threaded connection with a movable connecting pin technology fundamentally solves the problem of unavoidable stress concentration at the piston rod end threads, thus resolving the frequent fatigue cracking at threaded connections. A new oil guide hole structure was designed, which reduces the power consumption of the diaphragm compressor, saving energy and achieving significant energy savings. Due to the function of the new movable connecting rod in the large-capacity diaphragm compressor, the center line of the hydraulic cylinder bore coincides with the center line of the front part of the new movable connecting rod, reducing friction between the hydraulic cylinder bore and the piston, increasing the energy-saving effect of the diaphragm compressor, and extending its service life. The angle between the extended center line of the rear section of the new movable connecting rod and the component force PA is smaller than the angle between the extended center line of the rear section and the component force PB, increasing the driving force for rotating the crankshaft of the diaphragm compressor, further reducing power consumption and saving energy.

[0005] To achieve the objectives of this invention, the following technical solution is adopted:

[0006] A large-capacity diaphragm compressor with movable connecting rod, comprising a diaphragm A16, a cover plate A17, an elastic sealing gasket 18, a support plate A19, a hydraulic cylinder A20, a piston A21, a piston pin A22, a left-side novel movable connecting rod front part 23, a movable connecting pin 24, a left-side novel movable connecting rod rear part 25, a left-side connecting pin 26, a crank pin 27, a crankshaft A28, a base A29, a right-side connecting pin 30, a right-side novel movable connecting rod 31, a rocker arm 32, and a rocker arm mounting structure 33. The diaphragm A16 is characterized by an elastic sealing gasket 18 tightly fitted around its periphery; the cover plate A17 is mounted on top of the elastic sealing gasket 18, and the support plate A19 is mounted below it; the hydraulic cylinder A20 is located below the support plate A19. 0. A piston A21 is placed in the hydraulic cylinder A20. The piston pin A22 is connected to the front part 23 of the new left movable connecting rod. The front part 23 of the new left movable connecting rod is connected to the rear part 25 of the new left movable connecting rod via the movable connecting pin 24. One end of the rear part 25 of the new left movable connecting rod passes through the center line C of the rocker arm 32 and is assembled on the right connecting pin 30. One end of the right movable connecting rod 31 passes through the center line C of the rocker arm 32 and is assembled on the left connecting pin 26. The center line B of the hydraulic cylinder A20 coincides with the center line E of the front part 23 of the new left movable connecting rod. The angle between the extended center line F of the rear section of the new left movable connecting rod 25 and the component force PA is smaller than the angle between the extended center line F of the rear section and the component force PB.

[0007] Other feature 1: The new oil guide hole structure on the support plate A19 has a guide port at 50° to 65° at point 34.

[0008] Other feature 2: The elastic sealing gasket 18 has an elastic element inside, and the elastic element is surrounded by sealing material.

[0009] In this invention, a rocker arm mounting structure is installed on the base. The rocker arm is mounted on the rocker arm mounting structure, and a connecting pin is mounted on the rocker arm. The crank pin of the crankshaft is installed in the middle groove of the rocker arm. An elastic sealing gasket is tightly fitted around the periphery of the diaphragm. A cover plate is mounted on top of the elastic sealing gasket, and a support plate is mounted below it. A hydraulic cylinder is arranged below the support plate, and a piston is placed in the hydraulic cylinder. The piston pin is connected to the front part of the new type of movable connecting rod on the left. The front part of the new type of movable connecting rod on the left is connected to the rear part of the new type of movable connecting rod on the left via a movable connecting pin. One end of the rear part of the new type of movable connecting rod on the left passes through the center line of the rocker arm and is mounted on the right connecting pin. One end of the new type of movable connecting rod on the right passes through the center line of the rocker arm and is mounted on the left connecting pin. Since the left and right new type of movable connecting rods pass through the center line of the rocker arm, they are respectively installed at the connection position D and the connection position G between the new type of movable connecting rod and the rocker arm, forming a distance from the center of the rocker arm mounting structure. When the compressor generates a reaction force P′, this force passes through the piston, piston pin, front of the new movable connecting rod, movable connecting pin, and rear of the new movable connecting rod, splitting into two components, P′1 and P′2, at the connecting pin. Component P′1 is transmitted to the crankshaft via the rocker arm, consuming the compressor's power. Component P′2, directed downwards, rotates around the center of the rocker arm structure due to the distance between the center of the connecting pin and the center of the rocker arm structure. Since one end of the new movable connecting rod passes through the centerline of the rocker arm and is mounted on the connecting pin between the new movable connecting rod and the rocker arm, the direction of rotation of component P′2 is opposite to the direction of the reaction force P′. Utilizing the opposite motion of component P′2 and the reaction force P′, the reaction force P′ is overcome, driving the compressor crankshaft to rotate. This transforms the reaction force, which originally consumed compressor power, into a driving force that propels the compressor crankshaft to perform work. This significantly reduces the working pressure of the reaction force on the crankshaft, reducing compressor power consumption and saving energy. Due to the design of the new movable connecting rod in the large-capacity diaphragm compressor, the centerline of the hydraulic cylinder bore coincides with the centerline of the front part of the new movable connecting rod. This reduces friction between the hydraulic cylinder bore and the piston, increasing the energy efficiency of the diaphragm compressor and extending its service life. The angle between the extended centerline of the rear section of the new movable connecting rod and the component force PA is smaller than the angle between the extended centerline of the rear section and the component force PB, increasing the driving force for rotating the crankshaft of the diaphragm compressor. The flared guide port at the new oil guide orifice reduces resistance to fluid flow, further reducing the power consumption of the large-capacity diaphragm compressor and saving energy, resulting in significant energy savings. Attached Figure Description

[0010] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The embodiments described in the drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0011] Figure 1 This is a schematic diagram of the existing diaphragm compressor drive structure.

[0012] Figure 2 This is a schematic diagram of a large-capacity diaphragm compressor with a movable connecting rod.

[0013] Figure 3 This is an enlarged structural diagram of section H of a large-capacity diaphragm compressor with a movable connecting rod.

[0014] Figure 4 This is a schematic diagram of the force analysis of the extended line F of the center of the rear section 25 of the new type of movable connecting rod on the left side of the large-capacity diaphragm compressor.

[0015] Figure 5 This is a cross-sectional structural diagram of a large-capacity diaphragm compressor with a movable connecting rod.

[0016] Figure 6 This is a schematic diagram of the structure at the new oil guide port of a large-capacity diaphragm compressor with a movable connecting rod.

[0017] Figure 7 This is an enlarged structural diagram of the new oil guide port M of the large-capacity diaphragm compressor with movable connecting rod.

[0018] Figure 8 This is a schematic front view of the swing arm structure of a large-capacity diaphragm compressor with a movable connecting rod.

[0019] Figure 9 This is a cross-sectional structural diagram of the swing arm BB of a large-capacity diaphragm compressor with a movable connecting rod.

[0020] Figure 10 This is a schematic diagram of the front part 23 of the new movable connecting rod on the left side of the large-capacity diaphragm compressor with movable connecting rod, the movable connecting pin 24, and the rear part 25 of the new movable connecting rod on the left side.

[0021] Figure 11 This is a schematic diagram of the new movable connecting rod 31 on the right side of the large-capacity diaphragm compressor with movable connecting rod. Detailed Implementation

[0022] See appendix Figures 1 to 11 In the appendix Figure 2A rocker arm mounting structure 33 is installed on the center base A29. The rocker arm 32 is mounted on the rocker arm mounting structure 33. The crank pin 27 of the crankshaft A28 is installed in the middle slide groove of the rocker arm 32. Wear-resistant plates or wear-resistant alloys are installed on both sides of the middle slide groove. The left connecting pin 26 and the right connecting pin 30 are mounted on the rocker arm 32. An elastic sealing gasket 18 is tightly fitted around the periphery of the diaphragm A16. A cover plate A17 with a domed inner surface is installed on the elastic sealing gasket 18 to form a diaphragm cavity. A support plate A19 with a domed surface is installed below the elastic sealing gasket 18 to limit the lower limit position. A hydraulic cylinder A20 is arranged below the support plate A19. A piston A21 is placed in the hydraulic cylinder A20. The piston pin A22 is connected to the front part 23 of the new left movable connecting rod. The front part 23 of the new left movable connecting rod is connected to the rear part 25 of the new left movable connecting rod via a movable connecting pin 24. One end of the rear part 25 of the new movable connecting rod on the left passes through the center line C of the rocker arm 32 and is assembled onto the connecting pin 30 on the right. One end of the new movable connecting rod 31 on the right passes through the center line C of the rocker arm 32 and is assembled onto the connecting pin 26 on the left. Since the left and right new movable connecting rods pass through the center line C of the rocker arm 32, they are installed at the connection positions D and G between the new movable connecting rod and the rocker arm 32, respectively, forming a distance from the center of the rocker arm mounting structure 33. When the compressor operates and generates a reaction force P′, the generated reaction force P′ passes through the piston A21, piston pin A22, the front part 23 of the new movable connecting rod, the movable connecting pin 24, and the rear part 25 of the new movable connecting rod, and is divided into two components, P′1 and P′2, at the connecting pin 30. Component P′1 is transmitted to the crankshaft A28 through the rocker arm 32, consuming the compressor's power. The component force P′2 is downward. Because there is a distance between the center of the connecting pin 30 and the center of the mounting structure 33, the downward-directed component force P′2 rotates around the center of the mounting structure 33 during motion. Since one end of the new movable link passes through the center line C of the swing rod 32 and is mounted on the connecting pin between the new movable link and the swing rod 32, the direction of rotation of the component force P′2 is opposite to the direction of the reaction force P′ (e.g., ...). Figure 2 As shown in NI, by utilizing the opposite motion of the component force P′2 and the reaction force P′, the reaction force P′ is overcome to drive the compressor crankshaft to rotate. This transforms the reaction force, which originally consumed compressor power, into a driving force that propels the compressor crankshaft to rotate, significantly reducing the working pressure of the reaction force on the crankshaft, thus reducing compressor power consumption and saving energy.

[0023] Due to the function of the new movable connecting rod in the large-capacity diaphragm compressor, the center line B of the inner bore of hydraulic cylinder A20 coincides with the center line E of the front part 23 of the new movable connecting rod. This reduces friction between the inner bore of hydraulic cylinder A20 and piston A21, increases the energy-saving effect of the diaphragm compressor, and extends its service life. The technical structure of connecting the front part 23 of the new movable connecting rod on the left to the rear part 25 of the new movable connecting rod on the left via the movable connecting pin 24 solves the problem of poor lubrication conditions at the crosshead pin, which makes wear difficult to prevent, and also solves the problem of frequent fatigue cracking accidents at the threaded end of the piston rod at the crosshead end. The movable connecting pin 24 technology replaces the connection structure between the threaded end of the piston rod 9 and the threaded end of the crosshead 10, fundamentally solving the problem of unavoidable severe stress concentration at the piston rod end thread, and resolving the problem of frequent fatigue cracking accidents at the threaded connection. The angle between the extended center line F of the rear section of the new movable connecting rod and the component force PA is smaller than the angle between the extended center line F of the rear section and the component force PB, thus increasing the driving force for rotating the crankshaft of the diaphragm compressor. (See attached instruction manual) Figure 4 As shown, the angle between the extended center line F of the rear section of the new movable connecting rod 25 and the component force PA is 22°, which is smaller than the angle between the extended center line F of the rear section and the component force PB is 68°. If the reaction force P9 = 3000 kg, then PA = COS22° × 3000 kg = 0.927 × 3000 = 2781 kg, and PB = COS68° × 3000 kg = 0.3746 × 3000 kg = 1123.8 kg. The downward force of 2781 kg pushes the pendulum rod 32 to rotate around the center of the pendulum rod mounting structure 33, increasing the driving force for the crankshaft of the large-capacity diaphragm compressor to rotate and thus saving energy.

[0024] Figure 6 , Figure 7 This is a schematic diagram of the new oil guide port of the large-capacity diaphragm compressor with a movable connecting rod. The new oil guide port 34 is designed with a flared opening R, with an angle between 50° and 65°. The flared opening reduces the resistance to liquid flow, further reducing the power consumption of the large-capacity diaphragm compressor with a movable connecting rod, thus saving energy and achieving a significant energy-saving effect.

[0025] Figure 8 , Figure 9 This is a schematic diagram of the swing arm 32 of a large-capacity diaphragm compressor with a movable connecting rod. The swing arm 32 has an assembly hole 35 for mounting the swing arm structure 33, a slot 36 in the middle, a hole 37 (D′) to the left of the center line C′ connecting the right-side new movable connecting rod 31 to the swing arm 32, a hole 37′ (G′) to the right of the center line C′ connecting the rear part 25 of the left-side new movable connecting rod to the swing arm 32, and a sliding groove 38 at the bottom.

[0026] Figure 10 , Figure 11 This is a schematic diagram of the structure of a large-capacity diaphragm compressor with movable connecting rods, including the front part 23 of the new movable connecting rod on the left, the movable connecting pin 24, the rear part 25 of the new movable connecting rod on the left, and the new movable connecting rod 31 on the right. The front part 23 of the new movable connecting rod on the left has a mounting hole 39, and the rear part 25 of the new movable connecting rod on the left has a mounting hole 40. The front part 23 of the new movable connecting rod on the left is connected to the rear part 25 of the new movable connecting rod on the left via the movable connecting pin 24. The rear part 25 of the new movable connecting rod on the left has a thickness dimension M. The new movable connecting rod 31 on the right has a mounting hole 41, a through groove 42, and a mounting hole 43. The thickness dimension M of the rear part 25 of the new movable connecting rod on the left matches the dimension M′ of the through groove 42 of the new movable connecting rod 31 on the right. One end of the new right movable link 31 passes through the center line C′ of the swing arm 32 and is fitted onto the left connecting pin 26. One end of the rear part 25 of the new left movable link passes through the center line C′ of the swing arm 32 and through the through groove 42 of the new right movable link 31 and is fitted onto the right connecting pin 30. The connection position G between the rear part 25 of the new left movable link and the swing arm 32 is to the right of the center line C of the swing arm 32, and the connection position D between the new right movable link 31 and the swing arm 32 is to the left of the center line C of the swing arm 32.

[0027] The embodiments described above are merely preferred examples of the present invention and are not intended to limit the scope of the invention. The technology of the present invention can manufacture various types and models of large-capacity diaphragm compressors with movable connecting rods. All equivalent changes or modifications made within the scope of the present invention, compressor products using the principle of large-capacity diaphragm compressors with movable connecting rods, and compressor products with the technical features of large-capacity diaphragm compressors with movable connecting rods, or improvements and substitutions made based on the present invention using technologies known in the art, should be included within the scope of patent protection of the present invention.

[0028] In summary, this invention, a large-capacity diaphragm compressor with a movable connecting rod, pioneers a new technical structure, and incorporates elastic sealing gasket technology and a novel movable connecting rod technology. It solves the problems of small diaphragm cavity volume, low efficiency, and diaphragm deformation and damage caused by diaphragm bending in existing diaphragm compressors. It also addresses the issue of poor lubrication conditions at the crosshead pin, making wear difficult to prevent, and the frequent fatigue cracking of the piston rod end threads at the crosshead. By replacing the threaded connection structure with movable connecting pin technology, it fundamentally solves the problem of severe stress concentration at the piston rod end threads, which is unavoidable, and addresses the serious technical issues of frequent fatigue cracking at threaded connections. This saves energy, extends the service life of the diaphragm compressor, and represents a significant advancement in diaphragm compressor technology.

Claims

1. A large-capacity diaphragm compressor with movable connecting rod, comprising a diaphragm A (16), a cover plate A (17), an elastic sealing gasket (18), a support plate A (19), a hydraulic cylinder A (20), a piston A (21), a piston pin A (22), a front part (23) of a novel movable connecting rod on the left side, a movable connecting pin (24), a rear part (25) of a novel movable connecting rod on the left side, a left connecting pin (26), a crank pin (27), a crankshaft A (28), a base A (29), a right connecting pin (30), a novel movable connecting rod on the right side (31), a rocker arm (32), and a rocker arm mounting structure (33), characterized in that: A diaphragm A (16) is tightly fitted with an elastic sealing gasket (18) around its periphery. A cover plate A (17) is mounted on top of the elastic sealing gasket (18), and a support plate A (19) is mounted below it. A hydraulic cylinder A (20) is configured below the support plate A (19). A piston A (21) is placed in the hydraulic cylinder A (20). The piston pin A (22) is connected to the front part (23) of the new type movable connecting rod on the left. The front part (23) of the new type movable connecting rod on the left is connected to the rear part (25) of the new type movable connecting rod on the left via a movable connecting pin (24). One end of the rear part (25) of the new type of movable link passes through the center line C of the swing rod (32) and is assembled on the right connecting pin (30). One end of the right new type of movable link (31) passes through the center line C of the swing rod (32) and is assembled on the left connecting pin (26). The center line B of the hydraulic cylinder A (20) coincides with the center line E of the front part (23) of the left new type of movable link. The angle between the extension line F of the rear section of the left new type of movable link (25) and the component force PA is smaller than the angle between the extension line F of the rear section and the component force PB.

2. A large-capacity diaphragm compressor with a movable connecting rod according to claim 1, characterized in that... The new oil guide hole structure (34) on the support plate A (19) has a guide port of 50° to 65°.

3. A large-capacity diaphragm compressor with a movable connecting rod according to claim 1, characterized in that: The elastic sealing gasket (18) has an elastic element inside, and the elastic element is surrounded by sealing material.

Images