Torque testing device and method for split type generator rotor expansion support for shaft

Abstract

The invention provides a torque testing device and a torque testing method for a rotor expansion bracket of a split type generator for a shaft, and relates to the 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, a torque applying device and a torque testing system. 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, a model changing piece is convenient to replace, the real installation state of the expansion support on the generator rotor shaft is reproduced, and the test result is accurate and reliable.

Description

Technical Field

[0001] The present invention specifically relates to a torque testing device for a shaft-used split-type generator rotor expansion bracket, and relates to the technical field of ship power generation. Background Art

[0002] The shaft generator rotor expansion bracket is a keyless coupling structure that relies on friction to achieve power transmission and is widely used in the field of ship power generation technology. The expansion bracket has an inner sleeve surface for holding the generator rotor shaft tightly and a connecting plate for connecting the power output component. Compared with the key structure, the expansion bracket transmits a large torque and has a protective effect on the generator rotor shaft, and will not damage the generator rotor shaft when overloaded. In order to facilitate assembly, the expansion bracket mostly adopts a split-petal structure.

[0003] At present, the torque transmitted by the expansion bracket cannot be quantified by a calculation formula like a key structure, and the torque can only be detected by a torque test device. During the detection process, it was found that the existing torque test device has the following defects: 1. Generators are divided into multiple models according to power size. The greater the power, the larger the diameter of the generator rotor shaft, and the power output components connected to the expansion bracket connecting plate also have different connection structures. Therefore, each model of generator must be matched with expansion brackets of different sizes and structures. This requires the production of many torque test devices, which greatly increases the manufacturing cost of the torque test device.

[0004] 2. The existing torque testing device cannot reproduce the actual installation state of the expansion bracket on the generator rotor shaft, resulting in unreliable test results.

[0005] References: Chinese Patent CN 106092550 B Chinese Patent CN 116382188 A Chinese Patent CN 219434326 U Summary of the invention

[0006] In order to overcome the shortcomings of the background technology, the present invention discloses a torque test device for a shaft-type split-type generator rotor expansion bracket, the purpose of which is: 1. Improve the versatility of the torque testing device and reduce the manufacturing cost of the torque testing device.

[0007] 2. Reproduce the actual installation state of the expansion bracket on the generator rotor shaft to improve the accuracy of the test results.

[0008] The present invention adopts the following technical solution: Technical Solution

[0009] A torque test device for a shaft-type split-flap generator rotor expansion bracket, comprising: front support frame and rear support frame; A dummy shaft is detachably mounted between the front support frame and the rear support frame and is used to install the expansion bracket; The brake support is composed of two halves; The transition flange is detachably mounted on the brake support and has a variety of models that are compatible with the expansion bracket connection plate; The torque applying device comprises a force applying arm and a cylinder, wherein the force applying arm is detachably mounted on the dummy shaft and is used to apply a test torque to the dummy shaft; The torque testing system includes a central control module, a data processing module and a pressure sensor, and is used to measure the torque borne by the expansion bracket.

[0010] After implementing technical solution 1, compared with the background technology, the beneficial effects produced by the present invention are: 1. Good versatility. When testing different types of expansion brackets, only the dummy shaft and transition flange need to be replaced, and the rest of the parts can be used universally. In this way, only one torque test device is needed to test various types of expansion brackets, which greatly reduces the manufacturing cost of the torque test device.

[0011] 2. The actual installation state of the expansion bracket on the generator rotor shaft is reproduced, and the test results are accurate and reliable.

[0012] 3. The brake support adopts a split structure, which is convenient for quick replacement of the dummy shaft.

[0013] Improved technical solution 2 based on technical solution 1: the front support frame and the rear support frame have an upper bearing and a lower bearing for installing a dummy shaft, and the upper bearing and the lower bearing are connected by bolts.

[0014] After implementing Technical Solution 2, the beneficial effect produced is that the disassembly structure of the upper bearing shell and the lower bearing shell facilitates the rapid replacement of the dummy shaft.

[0015] Improved technical solution 3 based on technical solution 1: the brake support is composed of a left half and a right half, or a top half and a bottom half.

[0016] After implementing technical solution 3, the beneficial effect produced is that the two specific combined structures are convenient for replacing the false shaft.

[0017] Improved technical solution 4 based on technical solution 1: an external spline is provided on the dummy shaft, a spline sleeve is provided on the force applying arm, and the force applying arm is detachably mounted on the dummy shaft through the spline sleeve.

[0018] After implementing Technical Solution 4, the beneficial effects produced are: first, the torque transmitted by the spline structure is relatively large; second, it is easy to achieve rapid replacement of the dummy shaft.

[0019] Improved technical solution 5 based on technical solution 4: the spline sleeve is fixed on the force arm through a pin shaft.

[0020] After implementing technical solution 5, the beneficial effect produced is: when replacing the dummy shaft, the dummy shaft can be quickly disassembled and assembled on the force arm through the pin shaft.

[0021] Improved technical solution 6 based on technical solution 1: The torque testing device also includes a transition sleeve, which is detachably mounted on the dummy shaft through a key structure. The transition sleeve is used to install an expansion bracket, and has a variety of models that are compatible with the inner sleeve surface of the expansion bracket.

[0022] After implementing Technical Solution 6, the beneficial effect produced is: by providing various types of transition sleeves, the dummy shaft can also have universality. Since there is no need to produce various types of dummy shafts, the manufacturing cost of the torque testing device is further reduced.

[0023] Improved technical solution 7 based on technical solution 6: the transition sleeve is composed of two parts.

[0024] After implementing technical solution 7, the beneficial effect produced is: the transition sleeve is composed of two parts, and there is no need to disassemble the dummy shaft when testing different types of expansion brackets.

[0025] Improved technical solution 8 based on technical solution 6 or 7: the transition sleeve and the dummy shaft are connected by a spline structure.

[0026] After implementing Technical Solution 8, the beneficial effects produced are: first, the torque transmitted by the spline structure is relatively large; second, it is easy to change the transition sleeve.

[0027] Improved technical solution 9 based on technical solution 1: A testing method, gradually increasing the oil pressure of the oil cylinder until the expansion bracket slips, and recording and obtaining the maximum torque value that the expansion bracket can withstand through a torque testing system.

[0028] After implementing technical solution 9, the beneficial effect is that the maximum torque value that the expansion bracket can withstand can be obtained by using this test method. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Attached Figure 1 Shown is a front view of the torque testing device.

[0030] Attached Figure 2 Shown is a side view of the torque testing device.

[0031] Attached Figure 3 Shown is a top view of the torque testing device.

[0032] Attached Figure 4 What is shown is the structural schematic diagram of the front support frame.

[0033] Attached Figure 5 Shown is a schematic structural diagram of a brake support.

[0034] Attached Figure 6 Shown is a schematic diagram of the structure of the transition flange and the expansion bracket.

[0035] Attached Figure 7 Shown is a schematic diagram of the structure of the torque testing system.

[0036] Attached Figure 8 Shown is a schematic structural diagram of a transition sleeve.

[0037] In the attached figure: 1. front support frame; 2. rear support frame; 3. dummy shaft; 4. brake support; 5. transition flange; 6. force arm; 7. cylinder; 8. spline sleeve; 9. pin shaft; 10. transition sleeve; 11. test platform; 12. expansion bracket; 13. pressure sensor. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these preferred embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. It should be noted that in the description of the present invention, the terms "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation and positional relationship, and therefore cannot be understood as a limitation of the present invention. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] A torque test device for a shaft-type split-flap generator rotor expansion bracket relates to the field of power generation and is mainly used to solve the problem of poor versatility of torque test devices in the prior art. The composition structure and working principle of the torque test device are specifically described below. Embodiment 1:

[0040] Refer to the attached Figure 1-3The torque testing device is mainly composed 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 applying device, wherein the front support frame 1, the rear support frame 2, the brake support 4, and the torque applying device are installed on a test platform 11.

[0041] Refer to the attached Figure 4 , attached Figure 4 The front support frame 1 is a schematic diagram of the structure. The front support frame 1 has the same structure as the rear support frame 2, and both have a steel plate welded support and an upper bearing and a lower bearing for mounting a dummy shaft 3, and the upper bearing and the lower bearing are connected by bolts. The front support frame 1 and the rear support frame 2 are used to support the dummy shaft 3, and the split bearing structure is used to facilitate the rapid replacement of the dummy shaft 3.

[0042] The dummy shaft 3 is suspended and installed 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 the mounting surface are the same as the diameter and tolerance of the generator rotor shaft, which can reproduce the actual mounting state of the expansion bracket 12 on the generator rotor shaft. When working, the expansion bracket 12 is installed on the dummy shaft 3 using the expansion bolt, so that the inner sleeve surface of the expansion bracket 12 can be tightly clamped on the mounting surface to transmit torque through friction. In this embodiment, the dummy shaft 3 is a changeable part, which has a variety of models that are compatible with the expansion bracket 12.

[0043] Refer to the attached Figure 5 , attached Figure 5 The structure diagram of the brake support 4 is shown. The function of the brake support 4 is to prevent the dummy shaft 3 from rotating and provide a reverse torque for the expansion bracket 12. The brake support 4 is composed of two halves, and the combination can be a split combination of a left half and a right half, or a split combination of an upper half and a lower half. Both of these combinations facilitate the replacement of the dummy shaft 3. A circle of connecting holes is provided at the center of the brake support 4, and these connecting holes are used to connect the transition flange 5.

[0044] Refer to the attached Figure 6 , attached Figure 6 The structure diagram of the transition flange 5 and the expansion bracket 12 is shown. The transition flange 5 is a changeable part, and has a variety of models that are compatible with the expansion bracket 12. Specifically, the transition flange 5 has two inner and outer circles of connecting holes. The connecting holes of the outer circle correspond to the connecting holes on the brake support 4, and are used to fix the transition flange 5 on the brake support 4 through a bolt and nut connection pair; the connecting holes of the inner circle correspond to the connecting holes on the connecting plate of a certain model of the expansion bracket 12, and are used to fix the transition flange 5 on the expansion bracket 12 through a bolt and nut connection pair, thereby realizing the installation and fixation of different models of expansion brackets 12 on the brake support 4.

[0045] The torque applying device includes a force applying arm 6 and a pair of oil cylinders 7. The central part of the force applying arm 6 is detachably mounted on the dummy shaft 3, and the pair of oil cylinders 7 are symmetrically mounted at both ends of the force applying arm 6. The pair of oil cylinders 7 are respectively connected to the hydraulic pump station through control valves. When working, the left oil cylinder 7 applies thrust upwards, and the right oil cylinder 7 applies thrust downwards, so that a symmetrical test torque can be applied to the dummy shaft 3.

[0046] In this embodiment, a mounting hole and a circle of pin holes are provided at the center of the force arm 6, and a spline sleeve 8 is provided in the mounting hole. The spline sleeve 8 is detachably connected to the force arm 6 through a pin shaft 9. An external spline correspondingly connected to the spline sleeve 8 is provided on the dummy shaft 3, and the force arm 6 is detachably mounted on the dummy shaft 3 through the spline sleeve 8. The spline and pin shaft 9 connection structure is adopted. First, the torque transmitted by the spline structure is large; second, it is easy to realize the rapid change of the dummy shaft 3.

[0047] Refer to the attached Figure 7 , attached Figure 7 What is shown is a schematic diagram of the structure of the torque test system. The torque test device also includes a torque test system composed of a central control module, a data processing module, a pressure sensor 13, a hydraulic pump station, and a control valve. During the test, the central control module supplies oil to the oil cylinder 7 through the hydraulic pump station and gradually increases the pressure. At this time, the pressure sensor 13 is pressurized and transmits the generated pressure signal to the data processing module for digital-to-analog conversion, and then the current torque value is displayed in real time after processing by the central control module. When the oil pressure increases to a certain value, the expansion bracket 12 begins to slip, and the torque value begins to decrease. Then the maximum torque value of the expansion bracket 12 before it starts to slip is the maximum torque that the expansion bracket 12 can bear.

[0048] As can be seen from the above, the torque test device has good versatility. When testing different types of expansion brackets 12, only the dummy shaft 3 and the transition flange 5 need to be replaced, and the remaining components can be used universally. In this way, only one torque test device needs to be made to detect multiple types of expansion brackets 12, which greatly reduces the manufacturing cost of the torque test device. In addition, the torque test device reproduces the actual installation state of the expansion bracket 12 on the generator rotor shaft, and the test results are accurate and reliable. Embodiment 2:

[0049] The difference between this embodiment and the first embodiment is that the dummy shaft 3 is not a changeable part but a universal part. Specifically, the dummy shaft 3 is a spline shaft as a whole.

[0050] Refer to the attached Figure 8The torque testing device also includes a transition sleeve 10, which is provided with an internal spline that matches the dummy shaft 3. The transition sleeve 10 is detachably mounted on the dummy shaft 3 through the spline structure. The outer surface of the transition sleeve 10 is a cylindrical surface, which is used to install the expansion bracket 12. The transition sleeve 10 has a variety of models that are compatible with the inner sleeve surface of the expansion bracket 12. When changing the model, it is only necessary to replace the transition sleeve 10, which makes the dummy shaft 3 also universal, further reducing the manufacturing cost of the torque testing device, and it is only necessary to snap the transition sleeve 10 onto the dummy shaft 3.

[0051] For the convenience of installation, the transition sleeve 10 is composed of two parts. Thus, when testing different types of expansion brackets 12, it is not necessary to disassemble the dummy shaft 3, but only to buckle the transition sleeve 10 onto the dummy shaft.

[0052] It is worth noting that the contents not described in detail in the above embodiments are prior art. It is also worth noting that for those skilled in the art, any addition, subtraction, replacement and improvement made under the structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A torque test device for a shaft-type split-type generator rotor expansion bracket, characterized in that: include: front support frame and rear support frame; A dummy shaft is detachably mounted between the front support frame and the rear support frame and is used to install the expansion bracket; The brake support is composed of two halves; The transition flange is detachably mounted on the brake support and has a variety of models that are compatible with the expansion bracket connection plate; The torque applying device comprises a force applying arm and a cylinder, wherein the force applying arm is detachably mounted on the dummy shaft and is used to apply a test torque to the dummy shaft; The torque testing system includes a central control module, a data processing module and a pressure sensor, and is used to measure the torque borne by the expansion bracket.

2. A torque test device for a shaft-type split-type generator rotor expansion bracket as claimed in claim 1, characterized in that: The front support frame and the rear support frame are provided with an upper bearing shell and a lower bearing shell for installing a dummy shaft, and the upper bearing shell and the lower bearing shell are connected by bolts.

3. A torque testing device for a shaft-type split-type generator rotor expansion bracket as claimed in claim 1, characterized in that: The brake support is composed of a left half and a right half, or an upper half and a lower half.

4. A torque testing device for a shaft-type split-type generator rotor expansion bracket as claimed in claim 1, characterized in that: An external spline is arranged on the dummy shaft, a spline sleeve is arranged on the force applying arm, and the force applying arm is detachably mounted on the dummy shaft through the spline sleeve.

5. A torque testing device for a shaft-type split-type generator rotor expansion bracket as claimed in claim 4, characterized in that: The spline sleeve is fixed on the force application arm through a pin shaft.

6. A torque testing device for a shaft-type split-type generator rotor expansion bracket as claimed 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 an expansion bracket, and has a variety of models that are compatible with the inner sleeve surface of the expansion bracket.

7. A torque testing device for a shaft-type split-type generator rotor expansion bracket as claimed in claim 6, characterized in that: The transition sleeve is composed of two parts.

8. A torque testing device for a shaft-type split-type generator rotor expansion bracket as claimed in claim 6 or 7, characterized in that: The transition sleeve and the dummy shaft are connected via a spline structure.

9. A testing method applied to the torque testing device as claimed in claim 1, characterized in that: The oil pressure of the oil cylinder is gradually increased until the expansion bracket slips, and the maximum torque value that the expansion bracket can withstand is recorded and obtained through the torque testing system.

Images