Large-torque multipurpose diaphragm coupling for motor

Abstract

The utility model discloses a large-torque multipurpose diaphragm coupling for a motor, which relates to the technical field of torque transmission of electromechanical equipment and comprises a diaphragm group, a first rivet sleeve and a second rivet sleeve. According to the utility model, multiple layers of stainless steel diaphragms are laminated to form the diaphragm group, and the hollow rivet sleeve and the threaded rivet sleeve are combined, so that large torque can be effectively transmitted; the diaphragm group has good elasticity, so that stable operation of equipment can be ensured; the complex structure of a traditional coupler is abandoned, modular design is adopted, and only bolt connection is needed during installation; after being installed in place at a time, only fine adjustment is needed, and large movement is not needed; the diaphragm coupling can be applied to different torque systems, and is convenient to disassemble, assemble and replace, good in wear resistance and free of lubrication; the large-torque multipurpose diaphragm coupling for the motor is superior to a traditional coupling in structure and performance, can meet high requirements of modern industrial production for couplings, and has wide application prospects.

Description

Technical Field

[0001] This utility model relates to the field of torque transmission technology for electromechanical equipment, specifically a high-torque multi-purpose diaphragm coupling for motors. Background Technology

[0002] In the field of electromechanical equipment transmission, traditional coupling structures are no longer sufficient to meet the increasingly complex and demanding operating conditions. Early motors typically had relatively low rated torque, but with technological advancements, the rated torque of modern motors has increased from tens of thousands of Newton-meters to hundreds of thousands or even millions of Newton-meters. Furthermore, the mating dimensions of the transmitting and driven ends are often inconsistent, and the operating environments are complex. For example, industries such as cement ball mills or ship shaft-driven power generation experience significant impact and vibration, and the equipment is large and difficult to install and move. These factors render conventional connection methods inadequate for the needs of modern industrial production.

[0003] Traditional couplings, such as gear couplings, while capable of transmitting large torques, suffer from drawbacks including the need for lubrication and sealing, and the generation of wear and noise during operation. In contrast, diaphragm couplings, as flexible couplings with a metal elastic element, offer advantages such as elastic vibration reduction, noiselessness, and no need for lubrication. However, existing diaphragm couplings still have limitations in structure and performance, such as insufficient performance in high torque transmission, adaptability to complex working conditions, and ease of installation. Utility Model Content

[0004] The purpose of this invention is to provide a high-torque, multi-purpose diaphragm coupling for motors, in order to solve the problems mentioned in the background art regarding the shortcomings of existing diaphragm couplings in terms of high torque transmission, adaptability to complex working conditions, and ease of installation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-torque multi-purpose diaphragm coupling for motors, comprising an annular diaphragm assembly with multiple first rivet sleeves evenly distributed and riveted through it near its outer edge, and multiple second rivet sleeves evenly distributed and riveted through it near its inner edge; the diaphragm assembly is composed of multiple annular stainless steel diaphragms of the same specification stacked together, and the multiple layers of stainless steel diaphragms are riveted together by multiple first rivet sleeves and multiple second rivet sleeves; the axial center of the first rivet sleeve is a hollow circular hole; the axial center of the second rivet sleeve is a hollow circular hole, and fine threads are provided on its inner wall; the diaphragm assembly has multiple diaphragm holes of the same specification evenly distributed in an annular pattern between the first rivet sleeves and the second rivet sleeves.

[0006] Preferably, the first rivet sleeve is provided with a first rivet pad on the outer side of each of the two outer sides of the diaphragm assembly.

[0007] Preferably, the second rivet is provided with a second rivet pad on the outer side of each of the two outer sides of the diaphragm assembly.

[0008] Preferably, the stainless steel diaphragm is made of 1.0mm thick CrNi stainless steel. The stainless steel diaphragms are stacked into a diaphragm group. A first rivet sleeve is uniformly distributed in a ring near the outer edge of the diaphragm group, and a first rivet pad is provided at both ends of the first rivet sleeve. A second rivet sleeve is uniformly distributed in a ring near the inner edge of the diaphragm group, and a second rivet pad is provided at both ends of the second rivet sleeve.

[0009] Preferably, the diaphragm assembly has an outer diameter of Ф1400mm and is press-fitted with multiple first rivet sleeves and first rivet pads, as well as multiple second rivet sleeves and second rivet pads to form an independent unit—a diaphragm coupling; the diaphragm coupling is welded from Q235 and 45 shaft steel; the pad is made of Q235 steel, with a thickness of 30mm and an outer diameter of Ф1400mm; the drive coupling pin sleeve is made of 45 shaft steel.

[0010] Preferably, during installation, the diaphragm coupling is placed between the prime mover coupling on the prime mover shaft and the motor coupling on the test motor shaft, with a pad between the prime mover coupling and the motor coupling. The thickness of the pad is higher than the stop height of the prime mover coupling. The prime mover coupling has a series of coaxial through holes on its ring, and a prime mover coupling pin sleeve is installed in the through hole. A bolt with a reamed hole is used to pass through the first rivet sleeve, the pad, and the prime mover coupling pin sleeve, and a nut is used to connect the prime mover coupling and the diaphragm coupling into one unit. The motor shaft is equipped with a motor coupling, which has a series of coaxial through holes on its ring, and a fine-pitch bolt is used to pass through the through hole and connect to the internal thread of the second rivet sleeve into one unit.

[0011] Preferably, the tested motor is of various specifications.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The diaphragm coupling provided by this utility model can effectively transmit large torque by using a diaphragm group made of multiple layers of stainless steel diaphragms, combined with hollow rivet sleeves and threaded rivet sleeves, and is suitable for the transmission of electromechanical equipment at the level of millions of Newton-meters.

[0014] 2. The diaphragm assembly has good elasticity, which can compensate for the misalignment of the drive shaft and driven shaft caused by manufacturing errors, installation errors, deformation during operation or thermal expansion, thereby ensuring the stable operation of the equipment;

[0015] 3. It abandons the complex structure of traditional couplings and adopts a modular design. During installation, simply place the diaphragm coupling between the shaft of the prime mover and the shaft of the motor under test, and connect it with bolts. After installation, only minor adjustments are required, and no major movements are necessary.

[0016] 4. This diaphragm coupling can be applied to different torque systems, and is easy to disassemble and replace. It has good wear resistance and requires no lubrication. Its design can meet the needs of various specifications of test motors and complex working conditions.

[0017] 5. Due to its excellent elastic compensation and vibration resistance, it can operate safely under conditions of impact and vibration, thereby improving the operating efficiency and reliability of the equipment and reducing equipment failure and downtime.

[0018] In summary, the high-torque multi-purpose diaphragm coupling for motors of this invention is superior to traditional couplings in both structure and performance, and can meet the high requirements of modern industrial production for couplings, thus having broad application prospects. Attached Figure Description

[0019] Figure 1 This is the front view of the present utility model;

[0020] Figure 2 for Figure 1 Sectional view of AA;

[0021] Figure 3 for Figure 2 Enlarged view of B in the middle;

[0022] Figure 4 for Figure 2 Enlarged view of C;

[0023] Figure 5 This is a schematic diagram showing the connection between the diaphragm assembly, the prime mover, and the tested motor.

[0024] In the diagram: Diaphragm assembly-1, stainless steel diaphragm-11, diaphragm hole-12, first rivet sleeve-2, first rivet pad-21, second rivet sleeve-3, second rivet pad-31, prime mover-4, prime mover coupling-41, prime mover coupling through hole-42, prime mover coupling pin sleeve-43, tested motor-5, motor coupling-51, motor coupling through hole-52, pad-6. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0026] Please refer to Figure 1-5 , Figure 1 This is the front view of the present utility model; Figure 2 for Figure 1 Sectional view of AA; Figure 3 for Figure 2 Enlarged view of B in the middle; Figure 4 for Figure 2 Enlarged view of C; Figure 5 This is a schematic diagram showing the connection between the diaphragm assembly, the prime mover, and the motor under test.

[0027] This utility model provides a high-torque multi-purpose diaphragm coupling for motors, used for full-load testing of shaft-driven generators of various specifications and models; it includes an annular diaphragm assembly 1, with multiple first rivet sleeves 2 evenly distributed and riveted in a ring near the outer edge of the diaphragm assembly 1, and multiple second rivet sleeves 3 evenly distributed and riveted in a ring near the inner edge of the diaphragm assembly 1.

[0028] The diaphragm assembly 1 is made of multiple identical circular stainless steel diaphragms 11 stacked together. The multiple layers of stainless steel diaphragms 11 are riveted together by multiple first rivets 2 and multiple second rivets 3.

[0029] The first rivet sleeve 2 has a hollow round hole at its axis for bolts to pass through. The first rivet sleeve 2 has a first rivet pad 21 on the outer side of the two outer sides of the diaphragm group 1. The multi-layer stainless steel diaphragm 11 is fixed into one piece by the first rivet sleeve 2 and the two first rivet pads 21.

[0030] The second rivet sleeve 3 has a hollow round hole at its axis and fine threads on its inner wall for connection and fixation with bolts via threads. The second rivet sleeve 3 has second rivet pads 31 on the outer sides of the two outer sides of the diaphragm group 1, and the multi-layer stainless steel diaphragm 11 is fixed into one piece by the second rivet sleeve 3 and the two second rivet pads 31.

[0031] The diaphragm assembly 1 has multiple diaphragm holes 12 of the same specification evenly distributed in a ring between the first rivet 2 and the second rivet 3. The arrangement of the diaphragm holes 12 gives the diaphragm assembly 1 a certain degree of elasticity.

[0032] Example 1:

[0033] The stainless steel diaphragm 11 is made of 1.0mm thick CrNi or other high-quality stainless steel. Thirty stainless steel diaphragms 11 are stacked into a diaphragm group 1. Twenty-four first rivet sleeves 2 are evenly distributed in a ring around the outer edge of the diaphragm group 1 and are riveted through. First rivet pads 21 are provided at both ends of the first rivet sleeves 2. Eighteen second rivet sleeves 3 are evenly distributed in a ring around the inner edge of the diaphragm group 1 and are riveted through. Second rivet pads 31 are provided at both ends of the second rivet sleeves 3. Multiple diaphragm holes 12 of the same specification are evenly distributed in a ring between the first rivet sleeves 2 and the second rivet sleeves 3. The outer diameter of the stainless steel diaphragm 11 is the same as the outer diameter of the large flange of the transmission equipment.

[0034] During use, the prime mover plus gearbox has a large output torque and its position remains fixed. The tested motor, due to differences in center height and size, can be replaced using a specially designed platform and transition steel plate base, ensuring that the shaft of the prime mover is coaxial with the shaft of the tested motor. A diaphragm coupling is placed between the prime mover coupling 41 on shaft 4 of the prime mover and the motor coupling 51 on shaft 5 of the tested motor, with a pad 6 placed between the prime mover coupling 41 and the motor coupling 51. The thickness of 6 should be higher than the stop height of the prime mover coupling 41 to facilitate the insertion and installation of the diaphragm coupling; the prime mover coupling 41 has 24 prime mover coupling through holes 42 evenly distributed in a ring around it, which are coaxial with the first rivet sleeve 2, and a prime mover coupling pin sleeve 43 is provided in the prime mover coupling through hole 42; when connecting, a bolt with a reamer is used to pass through the first rivet sleeve 2, the pad 6, and the prime mover coupling pin sleeve 43, and a nut is used to connect the prime mover coupling 41 and the diaphragm coupling into one piece;

[0035] A motor coupling 51 is provided on the shaft of the motor. The motor coupling 51 has 18 motor coupling through holes 52 that are coaxial with the second rivet sleeve 3. When connecting, fine thread bolts are used to pass through the motor coupling through holes 52 and connect them to the internal thread of the second rivet sleeve 3 to form a whole. This completes the transmission connection between the prime mover and the tested motor.

[0036] Example 2:

[0037] The stainless steel diaphragm 11 is made of 1.0mm thick high-quality stainless steel. 30 stainless steel diaphragms 11 are stacked together to form a whole with a total thickness of 30mm and an outer diameter of Ф1400mm. It is press-fitted with multiple first rivet sleeves 2 and first rivet pads 21, as well as multiple second rivet sleeves 3 and second rivet pads 31 to form an independent unit—the diaphragm coupling. The diaphragm coupling is welded from Q235 and 45 shaft steel, and annealed after welding. The finished holes must be machined by CNC boring or CNC milling to ensure the relative position of the holes. The pad plate 6 is made of Q235 steel with a thickness of 30mm (25mm higher than the height of the large flange stop) and an outer diameter of Ф1400mm. The prime mover coupling pin sleeve 43 is made of 45 shaft steel, and its inner and outer diameters are strictly machined according to dimensional tolerance requirements to ensure its fit with bolts and other parts for the reaming holes.

[0038] During assembly, the positions of the prime mover, gearbox, and coupling remain fixed. First, install the pad 6 onto the end of the coupling (stop fit). Then, heat-fit the motor coupling onto the extended shaft of the tested motor, adjusting the overall position so that the flange faces of the couplings at both ends are installed according to the designed dimensions. Finally, assemble and insert the diaphragm assembly between the pad and the coupling, and then tighten it with fasteners to securely connect the rotating equipment on both sides.

[0039] This diaphragm coupling has been successfully applied at the Shanghai test base of the 711 Institute of China Shipbuilding Industry Corporation. It has completed full-load tests on multiple motor specifications, including the TF850-24 (850kW 690V 59RPM), 140,000 N·m shaft-driven generator, the TF1300-36 (1300kW 500V 48RPM), 260,000 N·m shaft-driven generator, and the TF4500-36 (4500kW 1800V 48RPM), 860,000 N·m shaft-driven generator. The results have been excellent, meeting the needs of users.

[0040] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A high-torque, multi-purpose diaphragm coupling for electric motors, characterized in that: The device includes a ring-shaped diaphragm assembly (1) with multiple first rivet sleeves (2) evenly distributed around its outer edge and multiple second rivet sleeves (3) evenly distributed around its inner edge. The diaphragm assembly (1) is made of multiple ring-shaped stainless steel diaphragms (11) of the same specification stacked together. The multiple layers of stainless steel diaphragms (11) are riveted together by multiple first rivet sleeves (2) and multiple second rivet sleeves (3). The first rivet sleeve (2) has a hollow round hole at its axis. The second rivet sleeve (3) has a hollow round hole at its axis and fine thread is provided on its inner wall. The diaphragm assembly (1) has multiple diaphragm holes (12) of the same specification evenly distributed around the first rivet sleeve (2) and the second rivet sleeve (3).

2. The high-torque multi-purpose diaphragm coupling for motors according to claim 1, characterized in that: The first rivet sleeve (2) is provided with a first rivet pad (21) on the outer side of the two outer sides of the diaphragm group (1).

3. The high-torque multi-purpose diaphragm coupling for motors according to claim 2, characterized in that: The second rivet sleeve (3) is provided with a second rivet pad (31) on the outer side of the two outer sides of the diaphragm group (1).

4. The high-torque multi-purpose diaphragm coupling for motors according to claim 3, characterized in that: The stainless steel diaphragm (11) is made of 1.0 mm thick CrNi stainless steel. 30 stainless steel diaphragms (11) are stacked into a diaphragm group (1). 24 first rivet sleeves (2) are evenly distributed in a ring around the outer edge of the diaphragm group (1) and first rivet pads (21) are provided at both ends of the first rivet sleeves (2). 18 second rivet sleeves (3) are evenly distributed in a ring around the inner edge of the diaphragm group (1) and second rivet pads (31) are provided at both ends of the second rivet sleeves (3).

5. The high-torque multi-purpose diaphragm coupling for motors according to claim 3, characterized in that: The diaphragm assembly (1) has an outer diameter of Ф1400mm and is press-fitted with multiple first rivet sleeves (2) and first rivet pads (21), as well as multiple second rivet sleeves (3) and second rivet pads (31) into an independent unit—the diaphragm coupling; the diaphragm coupling is welded from Q235 and 45 shaft steel; the pad plate (6) is made of Q235, with a thickness of 30mm and an outer diameter of Ф1400mm; the prime mover coupling pin sleeve (43) is made of 45 shaft steel.

6. The high-torque multi-purpose diaphragm coupling for motors according to claim 4 or 5, characterized in that: During installation, the diaphragm coupling is placed between the prime mover coupling (41) of the prime mover (4) shaft and the motor coupling (51) of the test motor (5) shaft, and a pad (6) is provided between the prime mover coupling (41) and the motor coupling (51). The thickness of the pad (6) is higher than the stop height of the prime mover coupling (41). The prime mover coupling (41) has 24 prime mover coupling through holes (42) evenly distributed in a ring on it, which are coaxial with the first rivet sleeve (2). A prime mover coupling is provided in the prime mover coupling through holes (42). The coupling pin sleeve (43) is connected to the diaphragm coupling by using a bolt with a reamed hole through the first rivet sleeve (2), the pad (6), and the prime mover coupling pin sleeve (43) and using a nut; the motor shaft is provided with a motor coupling (51), and the motor coupling (51) has 18 motor coupling through holes (52) that are coaxial with the second rivet sleeve (3) in a ring. Fine thread bolts are used to connect the motor coupling through holes (52) to the internal thread of the second rivet sleeve (3) to form a whole.

7. The high-torque multi-purpose diaphragm coupling for motors according to claim 6, characterized in that: The tested motor (5) is available in various specifications.

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