Torque testing device for split generator rotor expansion bracket for ship transmission shaft

Abstract

The utility model provides a split type generator rotor expansion support torque testing device for a ship transmission shaft, and relates to the technical field of ship power generation. The torque testing device is mainly composed of a front supporting frame, a rear supporting frame, a dummy shaft, a brake support, a transition flange plate and a torque applying device. Wherein the dummy shaft is detachably mounted between the front support frame and the rear support frame; the transition flange plate is detachably installed on the brake support and has various types connected with the expansion support connecting plate in a matched mode. The brake support is formed by combining two half parts. The torque testing device has good universality, when expansion supports of different models are tested, the expansion supports of various models can be detected only by replacing the dummy shaft, the transition flange plate and other model changing pieces, and the manufacturing cost of the torque testing device is greatly reduced. In addition, the torque testing device is convenient for replacing a remodeling piece, reproduces the real installation state of the expansion support on the generator rotor shaft, and is accurate and reliable in testing result.

Description

Technical Field

[0001] This utility model is specifically a torque testing device for a split-type generator rotor expansion bracket for a ship's drive shaft, relating to the field of ship power generation technology. Background Technology

[0002] The generator rotor expansion bracket for marine drive shafts is a keyless coupling structure that relies on friction to transmit power and is widely used in marine power generation technology. The expansion bracket has an inner sleeve surface for gripping the generator rotor shaft and a connecting disc for connecting power output components. Compared to keyed structures, the expansion bracket transmits a larger torque and protects the generator rotor shaft from damage under overload conditions. For ease of assembly, the expansion bracket often employs a segmented structure.

[0003] Currently, the torque transmitted by the tensioning bracket cannot be quantified by calculation formulas like that of a key structure; it can only be detected using a torque testing device. During testing, the following shortcomings were found in existing torque testing devices:

[0004] 1. Marine generators are divided into various models according to their power. The larger the power, the larger the diameter of the generator rotor shaft. Moreover, the power output components connected to the tension bracket connecting plate also have different connection structures. Therefore, each model of marine generator must be matched with tension brackets of different sizes and structures. This requires the manufacture of many torque testing devices, which greatly increases the manufacturing cost of torque testing devices.

[0005] 2. Existing torque testing devices cannot reproduce the actual installation state of the expansion joint bracket on the generator rotor shaft, resulting in unreliable test results.

[0006] References:

[0007] Chinese Patent CN 106092550 B

[0008] Chinese Patent CN 116382188 A

[0009] Chinese Patent CN 219434326 U Utility Model Content

[0010] To overcome the shortcomings of the prior art, this utility model discloses a torque testing device for a split-type generator rotor expansion bracket used in ship drive shafts, the purpose of which is:

[0011] 1. Improve the versatility of torque testing devices and reduce their manufacturing costs.

[0012] 2. To reproduce the actual installation state of the expansion joint bracket on the generator rotor shaft, so as to improve the accuracy of the test results.

[0013] The present invention adopts the following technical solution:

[0014] Technical Solution 1:

[0015] A torque testing device for a split-type generator rotor tensioning bracket used in marine drive shafts includes:

[0016] Front support frame and rear support frame;

[0017] A dummy shaft, detachably mounted between the front and rear support frames, is used to install a tensioning bracket;

[0018] The brake support is composed of a left half and a right half.

[0019] The transition flange is detachably mounted on the brake support and is available in various models that are compatible with the expansion bracket connecting plate.

[0020] A torque application device includes a force-applying arm and a hydraulic cylinder. The force-applying arm is detachably mounted on a dummy shaft and is used to apply a test torque to the dummy shaft.

[0021] After implementing technical solution 1, the beneficial effects of this utility model compared to the prior art are:

[0022] 1. Excellent versatility: When testing different models of tension brackets, only the dummy shaft and transition flange need to be replaced; all other components are interchangeable. This means that only one torque testing device needs to be manufactured to test multiple models of tension brackets, significantly reducing the manufacturing cost of the torque testing device.

[0023] 2. The test reproduced the actual installation state of the expansion joint bracket on the generator rotor shaft, and the test results were accurate and reliable.

[0024] 3. The brake support adopts a split structure, which facilitates quick replacement of the dummy shaft.

[0025] Improved technical solution 2 based on technical solution 1: The front support frame and the rear support frame have upper and lower bearing shells for installing dummy shafts, and the upper and lower bearing shells are connected by bolts.

[0026] The beneficial effects of implementing technical solution 2 are: the disassembly structure of the upper and lower bearing shells facilitates the quick replacement of the dummy shaft.

[0027] Improved technical solution 3 based on technical solution 1: An external spline is provided on the dummy shaft, and a spline sleeve is provided on the force-applying arm. The force-applying arm is detachably installed on the dummy shaft through the spline sleeve.

[0028] After implementing technical solution 3, the beneficial effects are: first, the spline structure transmits a larger torque; second, it facilitates the rapid replacement of the dummy shaft.

[0029] Improved technical solution 4 based on technical solution 3: The spline sleeve is fixed to the force-applying arm by a pin.

[0030] After implementing technical solution 4, the beneficial effect is that when replacing the dummy shaft, the dummy shaft can be quickly disassembled and assembled on the force-applying arm through the pin.

[0031] Improved technical solution 5 based on technical solution 1: The torque testing device further includes a transition sleeve, which is detachably mounted on the dummy shaft via a key structure. The transition sleeve is used to install the expansion bracket and has various models that are compatible with the inner sleeve surface of the expansion bracket.

[0032] After implementing technical solution 5, the beneficial effects are: setting up multiple types of transition bushings makes the dummy shaft also universal, and since it is not necessary to manufacture multiple types of dummy shafts, the manufacturing cost of the torque testing device is further reduced.

[0033] Improved technical solution 6 based on technical solution 5: The transition bushing is composed of two parts, and the transition bushing and the dummy shaft are connected by a spline structure.

[0034] After implementing technical solution 6, the beneficial effects are: the spline structure transmits a larger torque, and when testing different models of expansion brackets, it is not necessary to disassemble the dummy shaft. Attached Figure Description

[0035] Appendix Figure 1 The image shown is a front view of this torque testing device.

[0036] Appendix Figure 2 The image shown is a side view of this torque testing device.

[0037] Appendix Figure 3 The image shown is a top view of this torque testing device.

[0038] Appendix Figure 4 The diagram shown is a structural schematic of the front support frame.

[0039] Appendix Figure 5 The diagram shown is a schematic of the brake support structure.

[0040] Appendix Figure 6 The diagram shown is a structural schematic of the transition flange.

[0041] Appendix Figure 7 The diagram shown is a structural schematic of the expansion joint.

[0042] Appendix Figure 8 The diagram shown is a structural schematic of the torque testing system.

[0043] Appendix Figure 9 The diagram shown is a structural schematic of the transition bushing.

[0044] In the attached diagram: 1. Front support frame; 2. Rear support frame; 3. Dummy shaft; 4. Brake support; 5. Transition flange; 6. Applying arm; 7. Hydraulic cylinder; 8. Spline sleeve; 9. Pin; 10. Transition bushing; 11. Test platform; 12. Tensioning bracket; 13. Pressure sensor. Detailed Implementation

[0045] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these preferred embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or component must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] A torque testing device for a split-type generator rotor tensioning bracket used in marine drive shafts, relating to the power generation field, is mainly used to solve the problem of poor versatility in existing torque testing devices. The composition and working principle of this torque testing device are described in detail below. Example 1:

[0047] See attached document Figure 1-3 This torque testing device mainly consists of a front support frame 1, a rear support frame 2, a dummy shaft 3, a brake support 4, a transition flange 5, and a torque application device. The front support frame 1, the rear support frame 2, the brake support 4, and the torque application device are installed on the test platform 11.

[0048] See attached document Figure 4 , attached Figure 4 The diagram shows the structure of the front support frame 1. The front support frame 1 has the same structure as the rear support frame 2, both having welded steel plate supports and upper and lower bearing bushes for mounting the dummy shaft 3. The upper and lower bearing bushes are connected by bolts. The function of the front support frame 1 and the rear support frame 2 is to support the dummy shaft 3. The split bearing bush structure is used to facilitate quick replacement of the dummy shaft 3.

[0049] The dummy shaft 3 is suspended between the front support frame 1 and the rear support frame 2. The dummy shaft 3 has a cylindrical mounting surface, the diameter and tolerance of which are the same as those of the generator rotor shaft, thus reproducing the actual installation state of the expansion bracket 12 on the generator rotor shaft. During operation, expansion bolts are used to install the expansion bracket 12 onto the dummy shaft 3, allowing the inner sleeve of the expansion bracket 12 to be tightly clamped to the mounting surface, transmitting torque through friction. In this embodiment, the dummy shaft 3 is a replaceable part, available in various models compatible with the expansion bracket 12.

[0050] See attached document Figure 5 , attached Figure 5 The diagram shows the structure of the brake support 4. The function of the brake support 4 is to prevent the dummy shaft 3 from rotating and to provide reverse torque to the tensioning bracket 12. The brake support 4 is composed of two halves, which can be assembled separately as a left and right half or as an upper and lower half. Both assembly methods facilitate the replacement of the dummy shaft 3. A ring of connecting holes is provided at the center of the brake support 4 for connecting the transition flange 5.

[0051] See attached document Figure 6 and attached Figure 7 , attached Figure 6 The diagram shown is a structural schematic of the transition flange 5. Figure 7 The diagram shows the structure of the expansion bracket 12. The transition flange 5 is a replacement part, available in various models compatible with the expansion bracket 12. Specifically, the transition flange 5 has inner and outer rings of connecting holes. The outer ring of connecting holes corresponds to the connecting holes on the brake support 4, used to fix the transition flange 5 to the brake support 4 via bolt and nut connections. The inner ring of connecting holes corresponds to the connecting holes on the connecting plate of a certain model of expansion bracket 12, used to fix the transition flange 5 to the expansion bracket 12 via bolt and nut connections, thereby enabling the installation and fixation of different models of expansion brackets 12 on the brake support 4.

[0052] The torque application device includes a lever arm 6 and a pair of hydraulic cylinders 7. The center of the lever arm 6 is detachably mounted on the dummy shaft 3, and the pair of hydraulic cylinders 7 are symmetrically mounted at both ends of the lever arm 6. The pair of hydraulic cylinders 7 are connected to the hydraulic pump station through control valves. During operation, the left hydraulic cylinder 7 applies an upward thrust, and the right hydraulic cylinder 7 applies a downward thrust, thus applying a symmetrical test torque to the dummy shaft 3.

[0053] In this embodiment, a mounting hole and a ring of pin holes are provided at the center of the force-applying arm 6. A spline sleeve 8 is installed in the mounting hole, and the spline sleeve 8 is detachably connected to the force-applying arm 6 via a pin 9. An external spline is provided on the dummy shaft 3, which is connected to the spline sleeve 8. The force-applying arm 6 is detachably mounted on the dummy shaft 3 via the spline sleeve 8. The spline and pin 9 connection structure has two advantages: first, the spline structure can transmit a larger torque; second, it facilitates quick replacement of the dummy shaft 3.

[0054] See attached document Figure 8 , attached Figure 8 The diagram shows the structure of the torque testing system. The torque testing device also includes a torque testing system composed of a central control module, a data processing module, and a pressure sensor 13. During operation, the central control module supplies oil to the cylinder 7 via a hydraulic pump station to increase pressure. At this time, the pressure sensor 13 is pressurized and transmits the resulting pressure signal to the data processing module for digital-to-analog conversion. The signal is then processed by the central control module and displayed in real time as the current torque value. When the oil pressure increases to a certain value, the tensioning bracket 12 begins to slip, and the torque value begins to decrease. Therefore, the maximum torque value of the tensioning bracket 12 before slippage is the maximum torque that the tensioning bracket 12 can bear.

[0055] As can be seen from the above, this torque testing device has good versatility. When testing different models of expansion joint brackets 12, only the dummy shaft 3 and the transition flange 5 need to be replaced; all other components are interchangeable. This means that only one torque testing device needs to be manufactured to test multiple models of expansion joint brackets 12, significantly reducing the manufacturing cost. Furthermore, this torque testing device reproduces the actual installation state of the expansion joint bracket 12 on the generator rotor shaft, ensuring accurate and reliable test results. Example 2:

[0056] The difference between this embodiment and Example 1 is that the dummy shaft 3 is not a replacement part, but a general-purpose part. Specifically, the dummy shaft 3 is a splined shaft as a whole.

[0057] See attached document Figure 9 This torque testing device also includes a transition sleeve 10, which has an internal spline that mates with the dummy shaft 3. The transition sleeve 10 is detachably mounted on the dummy shaft 3 via the spline structure. The outer surface of the transition sleeve 10 is cylindrical and is used to mount the expansion bracket 12. The transition sleeve 10 has various models that fit the inner surface of the expansion bracket 12. When changing models, only the transition sleeve 10 needs to be replaced, thus making the dummy shaft 3 universal and further reducing the manufacturing cost of the torque testing device.

[0058] For ease of installation, the transition bushing 10 is composed of two parts. This way, when testing different models of expansion brackets 12, it is not necessary to disassemble the dummy shaft 3. The transition bushing 10 can simply be fastened onto the dummy shaft.

[0059] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A torque testing device for a split-type generator rotor expansion bracket used in marine drive shafts, characterized in that: include: Front support frame and rear support frame; A dummy shaft, detachably mounted between the front and rear support frames, is used to install a tensioning bracket; The brake support is composed of a left half and a right half. The transition flange is detachably mounted on the brake support and is available in various models that are compatible with the expansion bracket connecting plate. A torque application device includes a force-applying arm and a hydraulic cylinder. The force-applying arm is detachably mounted on a dummy shaft and is used to apply a test torque to the dummy shaft.

2. The torque testing device for the split-type generator rotor expansion bracket for a ship drive shaft as described in claim 1, characterized in that: The front and rear support frames have upper and lower bearing shells for mounting dummy shafts, which are connected by bolts.

3. The torque testing device for the split-type generator rotor expansion bracket for a ship drive shaft as described in claim 1, characterized in that: An external spline is provided on the dummy shaft, and a spline sleeve is provided on the force-applying arm. The force-applying arm is detachably mounted on the dummy shaft through the spline sleeve.

4. The torque testing device for the split-type generator rotor expansion bracket for a ship drive shaft as described in claim 3, characterized in that: The spline sleeve is fixed to the force-applying arm by a pin.

5. The torque testing device for the split-type generator rotor expansion bracket for a ship drive shaft as described in claim 1, characterized in that: The torque testing device also includes a transition sleeve, which is detachably mounted on the dummy shaft via a key structure. The transition sleeve is used to install the expansion bracket and has various models that are compatible with the inner sleeve surface of the expansion bracket.

6. The torque testing device for the split-type generator rotor expansion bracket for a ship drive shaft as described in claim 5, characterized in that: The transition bushing is composed of two parts, and the transition bushing is connected to the dummy shaft by a spline structure.

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