Crowned gear coupling and large-scale quick-change wind power gear box testing device

Abstract

The utility model discloses a crowned gear coupling and a large-scale quick-change wind power gear box testing device, and belongs to the field of couplings. Comprising a first flange connecting shaft, a first drum-shaped outer gear sleeve, a second drum-shaped outer gear sleeve and a second flange connecting shaft which are sequentially arranged along the central axis, and an inner gear ring arranged outside the first drum-shaped outer gear sleeve and the second drum-shaped outer gear sleeve in a sleeving mode. The first flange connecting shaft and the first drum-shaped outer gear sleeve are fixedly connected through pawl structures and bolts which are arranged on the outer end faces of the first flange connecting shaft and the first drum-shaped outer gear sleeve and embedded with each other. The second flange connecting shaft and the second drum-shaped outer gear sleeve are fixedly connected through pawl structures and bolts which are arranged on the outer end surfaces of the second flange connecting shaft and the second drum-shaped outer gear sleeve and are embedded with each other; the first drum-shaped outer gear sleeve and the second drum-shaped outer gear sleeve are connected with the inner gear ring in a meshed mode through gears. According to the utility model, the mutually embedded pawl structures are adopted for connection, so that large torque can be borne, the requirements on the strength, the number and the centering of connecting bolts are reduced, the connection and fastening are facilitated, and the safe and reliable transmission is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of couplings, in particular to a drum-shaped gear coupling and a large-scale quick-change wind power gearbox testing device. Background Art

[0002] As a key component of mechanical transmission device, drum gear coupling not only transmits torque and speed, but also plays the role of compensating for axial displacement, radial displacement and angular displacement between the two connected shafts. It has the characteristics of strong load-bearing capacity and smooth operation.

[0003] At present, many large-megawatt (5MW and above) wind turbine gearbox production lines use drum gear couplings to connect the two gearbox low-speed main shafts. The existing drum gear couplings for gearbox bench tests can transmit a nominal torque of 8500 kNm. The outer diameter of the coupling flange is about 1.8 meters and weighs about 20 tons. In order to ensure the connection strength and meet the torque and power requirements, the existing drum gear coupling has a structure such as Figure 8 As shown, it includes left and right first drum-shaped external teeth 1' and second drum-shaped external teeth 2', the end face flanges of which are respectively connected and fixed with two sets of gear box flange shafts by hinged bolts, and the first inner gear ring 3' and the second inner gear ring 4' are also connected and fixed by hinged bolts. The first drum-shaped external teeth 1' are meshed with the first inner gear ring 3' through gears, and the second drum-shaped external teeth 2' are meshed with the second inner gear ring 4' through gears.

[0004] When designing the coupling, the maximum allowable angle of the shafts at both ends is 2 degrees. However, in order to ensure a long service life of the coupling and reduce additional vibration during testing, it is generally required to calibrate the angle between the shafts at both ends to be less than 1 degree and the misalignment to be less than 0.25 mm during assembly. The connection of the reamed hole bolts has very high requirements in terms of phase and radial alignment. Since the two inner gear rings are long, only a laser alignment instrument can be used to adjust the alignment. The gearbox at the adjustment end weighs 40 tons, which is time-consuming and laborious to adjust. In addition, every time the production is changed, the hydraulic tensioner must be used to remove the 5' reamed bolt and nut assembly when replacing the test gearbox. There are nearly 100 pieces, which is a large workload and seriously affects production efficiency. The reamed bolts and nuts that are repeatedly disassembled and assembled must be scrapped regularly, and the test cost increases. Utility Model Content

[0005] In order to overcome the above technical defects, the utility model provides a drum gear coupling and a large-scale quick-change wind power gearbox testing device to solve the problems involved in the background technology.

[0006] The utility model provides a drum gear coupling, comprising: a first flange connecting shaft, a first drum external gear sleeve, a second drum external gear sleeve, a second flange connecting shaft, and an inner gear ring sleeved on the outside of the first drum external gear sleeve and the second drum external gear sleeve, which are sequentially arranged along the central axis;

[0007] The first flange connecting shaft and the first drum-shaped external gear sleeve are fixedly connected by means of ratchet structures and bolts which are arranged on their outer end surfaces and engage with each other; the second flange connecting shaft and the second drum-shaped external gear sleeve are fixedly connected by means of ratchet structures and bolts which are arranged on their outer end surfaces and engage with each other; the first drum-shaped external gear sleeve and the second outer drum-shaped external gear sleeve are respectively meshed and connected with the inner gear ring through gears.

[0008] Preferably or optionally, the pawl structure comprises: staggered bosses and grooves are arranged on the outer end surfaces of the first flange connecting shaft or the first drum-shaped external gear sleeve or the second drum-shaped external gear sleeve or the second flange connecting shaft.

[0009] Preferably or optionally, the center width of the boss is equal to or smaller than the center width of the groove.

[0010] Preferably or optionally, the first drum-shaped external gear sleeve and the second drum-shaped external gear sleeve both include: a gear portion matched with the inner gear ring is arranged on the outer surface of the first drum-shaped external gear sleeve or the second drum-shaped external gear sleeve;

[0011] And the gear part satisfies L 1 >1 / 2L 2 Where, L 1 is the length of the drum outer gear sleeve, L 2 is the length of the inner ring gear.

[0012] Preferably or optionally, the inner gear ring is an integrally formed structure, and two straight teeth are symmetrically distributed at both ends of the inner surface of the inner gear ring.

[0013] Preferably or optionally, the coupling further comprises: a first sealing assembly and a second sealing assembly;

[0014] The first sealing assembly and the second sealing assembly are respectively installed on the first drum-shaped external gear sleeve and the second outer drum-shaped external gear sleeve through waist-shaped stepped holes and bolts.

[0015] Preferably or optionally, the first sealing assembly and the second sealing assembly both include: a sealing cover, a skeleton oil seal, and a pressure plate;

[0016] The sealing cover is provided with waist-shaped stepped holes, which correspond one to one with the threaded holes on the end faces of the first drum-shaped external gear sleeve and the second drum-shaped external gear sleeve. The skeleton oil seal is embedded in the sealing cover and lightly contacts the first drum-shaped external gear sleeve and the second drum-shaped external gear sleeve respectively. The pressure plate presses the skeleton oil seal by bolts.

[0017] Preferably or optionally, the waist-shaped stepped hole has a waist-shaped shape, with steps in the depth direction, and the diameter of the through hole is d, and the outer diameter of the bolt head is d k , the large aperture D of the waist-shaped stepped hole 1 , stepped small aperture D 2, the waist-shaped stepped hole satisfies d≤D 2 <d k <D 1 .

[0018] Preferably or optionally, two lifting ears are symmetrically distributed on the outer surface of the inner gear ring.

[0019] The utility model also provides a large-scale quick-change wind power gearbox testing device, comprising the drum-shaped gear coupling.

[0020] The utility model relates to a drum gear coupling and a large quick-change wind power gearbox test device. Compared with the prior art, the utility model has the following beneficial effects: the utility model can bear large torque by adopting a mutually engaged ratchet structure connection, which not only reduces the strength, quantity and centering requirements of the connecting bolts, but also facilitates the connection and tightening, ensuring safe and reliable transmission. When testing gearboxes of different sizes and other powers, when the transmission power is met, it is only necessary to replace the first flange shaft and the second flange shaft.

[0021] On the whole, the entire utility model has a novel design, simple structure, safety and reliability, and has the characteristics of high assembly alignment accuracy, convenience and speed, and strong versatility. It can meet the testing requirements of large-megawatt wind power gearboxes with high torque and low speed, and realize rapid switching of different types of test gearboxes, greatly improving the assembly efficiency of the test bench and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the drum-shaped gear coupling in the utility model.

[0023] Figure 2 It is a left view of the drum-shaped gear coupling in the utility model.

[0024] Figure 3 It is the front view of the first flange connecting shaft in the utility model.

[0025] Figure 4 It is a side view of the first flange connecting shaft in the utility model.

[0026] Figure 5 It is a front view of the first drum-shaped external gear sleeve in the utility model.

[0027] Figure 6 It is a side view of the first drum-shaped external gear sleeve in the utility model.

[0028] Figure 7 It is the front view of the inner gear ring in the utility model.

[0029] Figure 8 It is a side view of the inner gear ring in the utility model.

[0030] Fig. 9 It is a partial enlarged view of the first sealing component in the utility model.

[0031] Fig.10 It is a side view of the sealing cover in the utility model.

[0032] Fig.11 It is a process schematic diagram of the drum-shaped gear coupling in the utility model.

[0033] Fig.12 It is a structural schematic diagram of an existing drum gear coupling;

[0034] The accompanying drawings are marked as follows: 1. first flange connecting shaft; 1-1. boss; 1-2. groove; 1-3. threaded hole; 2. first drum-shaped external gear sleeve; 2-1. gear part; 3. first sealing assembly; 4. inner gear ring; 4-1. spur gear; 5. second sealing assembly; 5-1. sealing cover; 5-2. skeleton oil seal; 5-3. pressure plate; 5-4. waist-shaped stepped hole; 6. second drum-shaped external gear sleeve; 7. second flange connecting shaft; 8. lifting ear; 1', first drum-shaped external gear; 2', second drum-shaped external gear; 3', first inner gear ring; 4', second inner gear ring. DETAILED DESCRIPTION

[0035] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0036] See attached Figures 1 to 11 A drum gear coupling comprises: a first flange shaft 1, a first drum-shaped external gear sleeve 2, a second drum-shaped external gear sleeve 6 and a second flange shaft 7 are arranged in sequence along the central axis, an inner gear ring 4 is sleeved on the outside of the first drum-shaped external gear sleeve 2 and the second outer drum-shaped external gear sleeve, and a first sealing component 3 and a second sealing component 5 are arranged at both ends of the inner gear ring 4 and are respectively in contact with the first drum-shaped external gear sleeve 2 and the second drum-shaped external gear sleeve 6.

[0037] Specifically, ratchet structures are arranged on the outer end surfaces of the first flange connecting shaft 1, the first drum-shaped external gear sleeve 2, the second drum-shaped external gear sleeve 6 and the second flange connecting shaft 7; the first flange connecting shaft 1 and the first drum-shaped external gear sleeve 2 are fixedly connected by ratchet structures and bolts which are arranged on their outer end surfaces and are engaged with each other; the second flange connecting shaft 7 and the second drum-shaped external gear sleeve 6 are fixedly connected by ratchet structures and bolts which are arranged on their outer end surfaces and are engaged with each other; the first drum-shaped external gear sleeve 2 and the second outer drum-shaped external gear sleeve are meshed and connected with the inner gear ring 4 respectively through gears; the first sealing assembly 3 and the second sealing assembly 5 are respectively installed on the first drum-shaped external gear sleeve 2 and the second outer drum-shaped external gear sleeve through waist-shaped stepped holes 5-4 and bolts.

[0038] In a further embodiment, the ratchet structure comprises: a staggered boss 1-1 and a groove 1-2 are arranged on the outer end surface of the first flange shaft 1 or the first drum-shaped external gear sleeve 2 or the second drum-shaped external gear sleeve 6 or the second flange shaft 7. The ratchet structure has various forms, such as the attached Figure 4 , Attachment Figure 6 As shown, the pawl structure includes equally divided bosses 1-1 and grooves 1-2, the number of bosses 1-1 and grooves 1-2 is equal, 4 in number, the center width A of the boss 1-1 is equal to or slightly smaller than the center width B of the groove 1-2, as shown in the attached Figure 5 , Attachment Figure 7 As shown, the center width is the distance between the center points on both sides of the boss 1-1 or the groove 1-2, so that the first flange shaft 1 or the first drum-shaped external gear sleeve 2 fits with each other, and the second flange shaft 7 and the second drum-shaped external gear sleeve 6 fit with each other, so as to realize a connection that can bear large torque. Moreover, threaded holes 1-3 are provided on the end faces of the first flange shaft 1 and the second flange shaft 7, and bolts are used to connect the second flange shaft 7 and the second drum-shaped external gear sleeve 6, and the second flange shaft 7 and the second drum-shaped external gear sleeve 6. Among them, the ratchet structure is mainly used to bear large torque, and the ordinary bolts used only play a connecting role, which not only reduces the strength, quantity and centering requirements of the connecting bolts, but also facilitates the connection and tightening, ensuring safe and reliable transmission.

[0039] In further embodiments, see the attached Figure 5 , Attachment Figure 6 , the first drum-shaped outer gear sleeve 2 and the second drum-shaped outer gear sleeve 6 both include: a gear portion 2-1 matching the inner gear ring 4 is provided on the outer surface of the first drum-shaped outer gear sleeve 2 or the second drum-shaped outer gear sleeve 6; and the gear portion 2-1 satisfies L 1 >1 / 2L 2 Where, L 1 is the length of the drum outer gear sleeve, L 2 is the length of the inner gear ring 4. The two sides of the gear portion 2-1 are respectively the shaft shoulders of the first drum-shaped outer gear sleeve 2 and the shaft shoulders of the second drum-shaped outer gear sleeve 6.

[0040] In further embodiments, see the attached Figure 7 , Attachment Figure 8 The inner gear ring 4 is an integrally formed structure, and two spur teeth 4-1 are symmetrically distributed at both ends of the inner surface of the inner gear ring 4, meshing with the gear parts 2-1 on the first flange connecting shaft 1 and the second flange connecting shaft 7 to achieve transmission. Stepped holes are symmetrically arranged at both ends of the spur teeth 4-1 for installing the first sealing assembly 3 and the second sealing assembly 5. Compared with the first inner gear ring 4 and the second inner gear ring 4 in the form of flanges in the prior art, the inner gear ring 4 in this embodiment does not need to be connected by bolts with holes, which can ensure the strength of the parts and save manufacturing costs.

[0041] In further embodiments, see the attached Fig. 9 , Attachment Fig.10 The first sealing assembly 3 and the second sealing assembly 5 both include a sealing cover 5-1, a skeleton oil seal 5-2, and a pressure plate 5-3. The sealing cover 5-1 is provided with a waist-shaped stepped hole 5-4. The waist-shaped stepped hole 5-4 is waist-shaped in shape, with steps in the depth direction. The diameter of the through hole is d, and the outer diameter of the bolt head is d. k , waist-shaped stepped hole 5-4 large aperture D 1 , stepped small aperture D 2 , the waist-shaped stepped hole 5-4 satisfies d≤D 2 <d k <D 1 The waist-shaped stepped hole 5-4 is connected and fastened with the threaded holes 1-3 on the end faces of the first drum-shaped outer gear sleeve 2 and the second drum-shaped outer gear sleeve 6 in a one-to-one correspondence through the inner hexagonal bolts. The skeleton oil seal 5-2 is embedded in the sealing cover 5-1 and lightly contacts the first drum-shaped outer gear sleeve 2 and the second drum-shaped outer gear sleeve 6 respectively. The pressure plate 5-3 presses the skeleton oil seal 5-2 with the bolts. The waist-shaped stepped hole 5-4 is connected and fastened with the threaded holes 1-3 on the end faces of the first drum-shaped outer gear sleeve 2 and the second drum-shaped outer gear sleeve 6 in a one-to-one correspondence through the inner hexagonal bolts. Figure 2 As shown, when adjusting the centering, loosen the hexagon socket bolt and rotate it in the circumferential direction for a certain angle to separate the second sealing assembly 5 from the inner gear ring 4, which is convenient and quick.

[0042] In a further embodiment, the skeleton oil seal 5-2 uses a single-lip skeleton oil seal 5-2 with a metal skeleton, which is embedded in the sealing cover 5-1. The pressure plate 5-3 presses the skeleton oil seal 5-2 by bolts, and grease is applied inside the lip. The edges of the lip are lightly in contact with the first drum-shaped external gear sleeve 2 and the second drum-shaped external gear sleeve 6 respectively, which prevents the leakage of lubricating grease and prevents the entry of external dust.

[0043] In a further embodiment, two lifting ears 8 are symmetrically distributed on the outer surface of the inner gear ring 4. The lifting ears 8 are cylindrical and have a central oil filling hole. They are symmetrically fastened to the middle position of the outer surface of the inner gear ring 4 by bolts. In this way, the inner gear ring 4 can be moved by means of a crane, and it is convenient to add lubricating grease from the outside, while ensuring the dynamic balance requirements of the coupling.

[0044] In order to facilitate the understanding of the technical solution of the drum gear coupling, a brief description of its application and installation process is given: See the attached Fig.11 During the centering adjustment operation, keep the positions of the first flange shaft 1 and the first drum-shaped external gear sleeve 2 unchanged, that is, fix the left side and do not move, loosen the hexagon socket bolt connecting the second sealing component 5 and the second drum-shaped external gear sleeve 6, and use the threaded hole 1-3 on the cylindrical surface of the second sealing component 5 to rotate it counterclockwise along the circumferential direction for a certain angle, that is, the position of the hexagon socket bolt in the waist-shaped stepped hole 5-4 changes from the small hole diameter D 2 Move to large aperture D 1 , use a crane to pull the lifting lug 8, gently lift the inner gear ring 4, and translate it axially to a certain position to ensure that the shoulder of the first drum-shaped outer gear sleeve 2 is exposed, so that the disengaged second sealing assembly 5 stays in the original position. Adsorb the dial indicator seat on the shoulder of the first drum-shaped outer gear sleeve 2, and the dial indicator measuring end contacts the shoulder of the second drum-shaped outer gear sleeve 6. Adjust the position of the right gearbox so that the angle between the two ends of the shaft is less than 1 degree and the misalignment is less than 0.25 mm. After the adjustment is completed, the inner gear ring 4 translates to the original position, and the second sealing assembly 5 is fastened to the inner gear ring 4 with a hexagon socket bolt. It can be seen that during the assembly process, relatively few bolts need to be fastened and connected. The bolts are ordinary bolts with small force and small tightening torque, which saves time and effort. When testing gearboxes of different sizes and other powers, when the transmission power is met, it is only necessary to replace the first flange shaft 1 and the second flange shaft 7.

[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A drum gear coupling, characterized in that: include: A first flange connecting shaft, a first drum-shaped external gear sleeve, a second drum-shaped external gear sleeve, a second flange connecting shaft, and an inner gear ring sleeved on the outside of the first drum-shaped external gear sleeve and the second outer drum-shaped external gear sleeve are sequentially arranged along the central axis; The first flange connecting shaft and the first drum-shaped external gear sleeve are fixedly connected by means of ratchet structures and bolts which are arranged on their outer end surfaces and engage with each other; the second flange connecting shaft and the second drum-shaped external gear sleeve are fixedly connected by means of ratchet structures and bolts which are arranged on their outer end surfaces and engage with each other; the first drum-shaped external gear sleeve and the second outer drum-shaped external gear sleeve are respectively meshed and connected with the inner gear ring through gears.

2. The drum gear coupling according to claim 1, characterized in that: The ratchet structure comprises: a first flange connecting shaft or a first drum-shaped external gear sleeve or a second drum-shaped external gear sleeve or a second flange connecting shaft is provided with staggered bosses and grooves on the outer end surface.

3. The drum gear coupling according to claim 2, characterized in that: The center width of the boss is equal to or smaller than the center width of the groove.

4. The drum gear coupling according to claim 1, characterized in that: The first drum-shaped external gear sleeve and the second drum-shaped external gear sleeve both include: a gear portion matched with an inner gear ring is arranged on the outer surface of the first drum-shaped external gear sleeve or the second drum-shaped external gear sleeve; And the gear portion satisfies L1>1 / 2L2, where L1 is the length of the drum-shaped outer gear sleeve and L2 is the length of the inner gear ring.

5. The drum gear coupling according to claim 1, characterized in that: The inner gear ring is an integrally formed structure, and two straight teeth are symmetrically distributed at both ends of the inner surface of the inner gear ring.

6. The drum gear coupling according to claim 1, characterized in that: The coupling further comprises: a first sealing assembly and a second sealing assembly; The first sealing assembly and the second sealing assembly are respectively installed on the first drum-shaped external gear sleeve and the second outer drum-shaped external gear sleeve through waist-shaped stepped holes and bolts.

7. The drum gear coupling according to claim 6, characterized in that: The first sealing assembly and the second sealing assembly both include: a sealing cover, a skeleton oil seal, and a pressure plate; The sealing cover is provided with waist-shaped stepped holes, which correspond one to one with the threaded holes on the end faces of the first drum-shaped external gear sleeve and the second drum-shaped external gear sleeve. The skeleton oil seal is embedded in the sealing cover and lightly contacts the first drum-shaped external gear sleeve and the second drum-shaped external gear sleeve respectively. The pressure plate presses the skeleton oil seal by bolts.

8. The drum gear coupling according to claim 7, characterized in that: The waist-shaped stepped hole has a waist-shaped shape, with steps in the depth direction. The diameter of the through hole is d, and the outer diameter of the bolt head is d k , the large aperture D1 of the waist-shaped stepped hole, the small aperture D2 of the stepped hole, the waist-shaped stepped hole satisfies d≤D2<d k <D1.

9. The drum gear coupling according to claim 1, characterized in that: The outer surface of the inner gear ring has two lifting ears symmetrically distributed.

10. A large-scale quick-change wind turbine gearbox testing device, characterized in that: A drum gear coupling comprising any one of claims 1 to 9.

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