A universal generator test connection transmission device

Abstract

The invention discloses a universal generator test connection transmission device, comprising an inner boss connection plate, a transmission pin, a first elastic sleeve, a second elastic sleeve, a transition plate, a special nut, a self-made screw pin, a screw, and a stop screw; the transmission pin passes through the hole on the transition plate, the second elastic sleeve, the boss of the inner boss connection plate, and the first elastic sleeve in sequence, and the transmission pin is fastened by a special nut and a stop screw, the self-made screw pin passes through the threaded hole on the transition plate from the notch of the inner boss connection plate and is inserted into the pin hole of the rotor dynamic balance connection plate, and the screw passes through the through hole on the transition plate from the notch and is connected to the dynamic balance connection plate. The invention has the advantages of elasticity, quick installation, and universality.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical parts, and in particular to a connecting transmission device for driving a machine shaft and a rotor coupling during a generator test. Background Art

[0002] During the development process, the generators produced need to be tested to check the performance of the generators. Since the requirements of each manufacturer are different, there are many types of couplings at the end of the generator. As a result, a complete set of tooling transmission devices and a complete set of dynamic balancing connection plates need to be designed for each type of coupling during the test run and dynamic balancing test. During each test run, dozens of transmission pins and elastic rings (such as Figure 1 As shown in the figure), the installation workload is large, the tooling manufacturing cost is high and the versatility is poor. In order to solve the above problems, the applicant has designed a universal generator test connection transmission device. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a generator test connection transmission device, which has the advantages of flexibility, quick installation, and universality.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A universal generator test connection transmission device, comprising an inner boss connection plate, a transmission pin, a first elastic sleeve, a second elastic sleeve, a transition plate, a special nut, a self-made screw pin, a screw, and a stop screw; the inner boss connection plate comprises an annular first plate body, four arc-shaped notches evenly arranged on the outer ring of the plate body, a number of large holes evenly arranged between adjacent notches and penetrating the first plate body, a boss arranged in the middle of the large hole, and a keyway arranged on the inner wall of the first plate body and cooperating with the stop key; the inner hole at the center of the first plate body is heat-shrinkably mounted on the drag machine shaft, and the first elastic sleeve and the second elastic sleeve are arranged on the inner boss connection plate. The inside of the large hole of the connecting plate is respectively located on both sides of the boss; the transition plate includes an annular second plate body, threaded holes symmetrically arranged on the second plate body, through holes symmetrically arranged on the second plate body, and holes evenly arranged between adjacent threaded holes and through holes and corresponding to the large holes on the first plate body; the transmission pin passes through the hole, the second elastic sleeve, the boss, and the first elastic sleeve in sequence, and the transmission pin is fastened by a special nut and a stop screw, and the homemade screw pin passes through the threaded hole from the notch of the inner boss connecting plate and is inserted into the pin hole of the rotor dynamic balancing connecting plate, and the screw passes through the through hole from the notch and is connected to the dynamic balancing connecting plate.

[0006] According to a further technical solution, the transmission pin and the transition plate are connected with an interference fit to prevent the transmission pin from rotating when the special nut is tightened.

[0007] A further technical solution is that the self-made screw pin includes a screw pin rod and a screw pin head arranged at the top of the screw pin rod; the screw pin rod includes a threaded portion and a cylindrical pin portion arranged below the threaded portion, and the end of the cylindrical pin portion is chamfered.

[0008] According to a further technical solution, the screw head is a cylindrical head with a square hole, and the square hole is convenient for tightening with a torque wrench.

[0009] A further technical solution is that the special nut includes a nut body and a screw hole passing through the nut body; the nut body includes a tail, a head located above the tail and with a smaller diameter than the tail, the side of the head is provided with a horizontally arranged stop threaded hole that cooperates with a stop screw, and the outer side of the head is provided with a cut surface that cooperates with a wrench.

[0010] According to a further technical solution, the bottom of the tail is cylindrical, the middle of the tail is inclined toward the connection with the head, and the head and the tail are integrally formed.

[0011] According to a further technical solution, a plurality of lifting holes are provided on the first disk body for lifting or turning.

[0012] According to a further technical solution, the outer diameters of the first elastic sleeve and the second elastic sleeve are 0.3-0.5 mm smaller than the diameter of the large hole.

[0013] According to a further technical solution, the boss is in the shape of a hollow ring and is arranged on the inner wall of the large hole.

[0014] In a further technical solution, the second elastic sleeve is installed in the large hole, and its tail protrudes 3mm from the surface of the inner boss connection plate, so as to ensure that there is a certain safety gap between the inner boss connection plate and the transition plate to prevent collision caused by axial impact of the rotor.

[0015] The second plate body of the transition plate of the present invention adopts an annular structure, and the through hole at the center thereof will not contact or interfere with the raised part of the dynamic balancing connecting plate while reducing weight, thereby ensuring normal operation.

[0016] The boss inside the first plate body of the inner boss connecting plate makes the elastic sleeve axially elastic and can effectively prevent the transmission pin from being disengaged due to the axial impact of the rotor during the test run.

[0017] The present invention provides a first elastic sleeve and a second elastic sleeve so that the transmission pin obtains certain radial and axial elasticity and the ability to compensate for the relative displacement of the two shafts. The outer circle size of the elastic sleeve is 0.3-0.5mm smaller than the inner hole of the inner boss connecting disk, which facilitates the installation of the elastic sleeve and can reduce the radial force caused by the eccentricity on the inner boss connecting disk.

[0018] The threaded part of the self-made screw pin is screwed into the transition plate, and the cylindrical pin part is used to connect and center with the rotor dynamic balancing connecting plate. The end of the cylindrical pin part is designed with a large chamfer to facilitate insertion.

[0019] Beneficial Effects

[0020] Compared with the prior art, the present invention has the following significant advantages:

[0021] 1. Elasticity advantage: The present invention can obtain certain radial and axial elasticity and the ability to compensate for the relative displacement of the two shafts by arranging an elastic sleeve. The boss structure in the inner boss connecting disk increases the axial elasticity of the elastic sleeve. The present invention takes into account the axial and radial elasticity requirements and can prevent the rotor from being disengaged due to axial impact.

[0022] 2. Advantages of quick installation: When connecting to the generator rotor, only four screws (two homemade screws and two ordinary hexagon socket screws) are needed to connect the transition plate to the rotor dynamic balancing connection plate, which greatly reduces the installation workload and achieves the effect of quick installation.

[0023] 3. General advantages: For different generator rotors, due to the different sizes of generator couplings, each generator must be designed with a corresponding dynamic balancing connection plate to meet the high-speed dynamic balancing test. As long as the dynamic balancing connection plate is designed with a connection hole corresponding to the generator test connection transmission device, this generator test connection transmission device can be applied, with wide versatility, avoiding repeated disassembly and reducing the tooling cost of the test.

[0024] 4. The generator test connection transmission device of the present invention has high safety, small installation workload, good application quality and wide versatility. For the test of a generator with a new structure, it is only necessary to design a dynamic balancing connection plate and there is no need to redesign the connection transmission device, thus saving a lot of tooling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a connection diagram of a transmission device and a generator coupling in the prior art;

[0026] Figure 2 The structure of the present invention is schematically shown Figure 1 ;

[0027] Figure 3 The structure of the present invention is schematically shown Figure 2 ;

[0028] Figure 4 It is a schematic diagram of the structure of the inner boss connection disk;

[0029] Figure 5 It is a structural schematic diagram of the transition plate;

[0030] Figure 6 It is the front view of the special nut;

[0031] Figure 7 It is a top view of the special nut;

[0032] Figure 8 This is the front view of the homemade screw pin;

[0033] Fig. 9 It is a top view of the homemade screw pin;

[0034] Fig.10 This is the front view of the dynamic balancing connection plate;

[0035] Fig.11 for Fig.10 AA view;

[0036] Fig.12 This is an enlarged view of the structure of the macropore;

[0037] Fig.13 The structure of the present invention is schematically shown Figure 3 .

[0038] Markings in the figure: 1, inner boss connection plate, 2, transmission pin, 3, first elastic sleeve, 4, second elastic sleeve, 5, special nut, 6, stop screw, 7, transition plate, 8, homemade screw pin, 9, screw, 10, drag machine shaft, 11, elastic sleeve, 12, washer, 13, nut, 14, generator rotor coupling, 15, boss, 16, dynamic balancing connection plate, 17, notch, 18, first plate body, 19, large hole, 20, keyway, 21, second plate body,

[0039] 22. threaded hole, 23. through hole, 24. hole, 25. inner hole, 26. transmission pin in the prior art, 27. lifting hole; 801. screw rod, 802. screw head, 803. threaded part, 804. cylindrical pin part, 805. square hole; 501. nut body, 502. screw hole, 503. tail, 504. head, 505. stop threaded hole, 506. section;

[0040] 1601, connecting disc body, 1602, first screw hole, 1603, pin hole, 1604, second screw hole, 1605, countersunk hole. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example

[0042] like Figure 2-Figure 13As shown, a universal generator test connection transmission device includes an inner boss connection plate 1, a transmission pin 2, a first elastic sleeve 3, a second elastic sleeve 4, a transition plate 7, a special nut 5, a self-made screw pin 8, a screw 9, and a stop screw 6; the inner boss connection plate 1 includes an annular first plate body 18, four arc-shaped notches 17 evenly arranged on the outer ring of the plate body, a plurality of large holes 19 evenly arranged between adjacent notches and penetrating the first plate body 18, a boss 15 arranged in the middle of the large hole 19, and a keyway 20 arranged on the inner wall of the first plate body 18 and cooperating with the stop key; the inner hole 25 at the center of the first plate body 18 is heat-shrinkably mounted on the drag machine shaft 10, and the first elastic sleeve 3 and the second elastic sleeve 4 are arranged inside the large hole 19 of the inner boss connection plate 1 , respectively located on both sides of the boss 15; the transition plate 7 includes an annular second plate body 21, threaded holes 22 symmetrically arranged on the second plate body 21, through holes 23 symmetrically arranged on the second plate body 21, and holes 24 evenly arranged between adjacent threaded holes 22 and through holes 23 and corresponding to the large holes 19 on the first plate body 18; the transmission pin 2 passes through the hole 24, the second elastic sleeve 4, the boss 15, and the first elastic sleeve 3 in sequence, and is fastened by a special nut 5 and a stop screw 6, the homemade screw pin 8 passes through the threaded hole 22 from the notch 17 and is inserted into the pin hole 1603 of the rotor dynamic balancing connecting plate 16, and the screw 9 passes through the through hole 23 from the notch 17 and is connected to the second screw hole 1604 of the dynamic balancing connecting plate 16.

[0043] The transmission pin 2 and the transition plate 7 are in interference connection to prevent the transmission pin 2 from rotating when the special nut 5 is tightened.

[0044] The self-made screw pin 8 comprises a screw pin rod 801 and a screw pin head 802 disposed at the top of the screw pin rod 801; the screw pin rod 801 comprises a threaded portion 803 and a cylindrical pin portion 804 disposed below the threaded portion 803, and the end of the cylindrical pin portion 804 is chamfered. The screw pin head 802 is a cylindrical head with a square hole 805, and the square hole is convenient for tightening with a torque wrench.

[0045] The special nut 5 includes a nut body 501 and a screw hole 502 passing through the nut body 501; the nut body 501 includes a tail 503, a head 504 located above the tail 503 and having a smaller diameter than the tail 503, a horizontally arranged stop threaded hole 505 cooperating with the stop screw 6 is provided on the side of the head 504, and a cut surface 506 cooperating with a wrench is opened on the outer side of the head 504.

[0046] The bottom of the tail portion 503 is cylindrical, and the middle of the tail portion 503 is inclined toward the connection with the head portion 504. The head portion 504 and the tail portion 503 are integrally formed.

[0047] The first plate body 18 is provided with a plurality of lifting holes 27 for lifting or turning.

[0048] The outer diameter of the first elastic sleeve 3 and the second elastic sleeve 4 is 0.3-0.5mm smaller than the diameter of the large hole 19. The boss 15 is hollow and annular and is arranged on the inner wall of the large hole 19. The second elastic sleeve 4 is installed in the large hole 19, and its tail protrudes 3mm from the surface of the inner boss connection plate 1. This ensures that there is a certain safety gap between the inner boss connection plate 1 and the transition plate 7 to prevent collision caused by axial impact of the rotor.

[0049] like Figure 10-11 As shown, the dynamic balancing connection disk 16 includes an annular connection disk body 1601, a first screw hole 1602 arranged in the inner circle of the disk body, a pin hole 1603 symmetrically arranged on the connection disk body 1601, a second screw hole 1604 symmetrically arranged on the connection disk body 1601, and a countersunk hole 1605 arranged between the pin hole 1603 and the second screw hole 1604. The first screw hole 1602 is connected to the dynamic balancing machine and is used in the dynamic balancing experiment. The pin hole 1603 is connected to the homemade screw pin 8, the second screw hole 1604 is connected to the screw 9, and the countersunk hole 1605 is connected to the generator rotor coupling 14 through a connecting component.

[0050] The working process of the present invention is as follows:

[0051] First, before the generator is tested, the rotor must be subjected to a high-speed dynamic balancing test. The dynamic balancing connecting disc used in the present invention can be directly used for the generator test without disassembly, eliminating the step of disassembling the dynamic balancing connecting disc. The dynamic balancing connecting disc directly adopts the dynamic balancing connecting disc in the prior art, and the structure only needs to be designed with a hole connected to the transition disc in the generator test connection transmission device.

[0052] 1. Shrink fit the inner boss connection plate onto the drag machine shaft and insert the stop key into the keyway.

[0053] 2. Connect the inner boss connection plate and the transition plate into a whole:

[0054] The transmission pin and the transition plate are connected by interference fit. After putting on the second elastic sleeve, insert it into the inner boss connecting plate, and then put on the first elastic sleeve. Tighten it with a special nut, adjust the gap between the transition plate and the inner boss connecting plate to meet the requirements, and screw in the stop screw.

[0055] (Steps 1 and 2 are only performed during the first installation. No further disassembly is required except for maintenance.)

[0056] 3. The generator test connection transmission device is connected to the generator rotor dynamic balance connection plate:

[0057] Screw the homemade screw pin into the threaded hole of the transition plate from the notch of the inner boss connecting plate, adjust the position of the dragging machine until the cylindrical pin part of the homemade screw pin can pass through the pin hole of the dynamic balancing connecting plate, and then use the screw to pass through the through hole from the notch to connect and tighten with the dynamic balancing connecting plate.

[0058] The head of the special nut of the present invention has a small diameter, which is used to reduce weight, reduce the centrifugal force during rotation, and improve the safety factor of the transmission pin. The tail has a slightly larger diameter, which is used to increase the contact area with the first elastic sleeve. The threaded hole is used to screw in the stop screw to prevent the nut from flying out during high-speed rotation during the test run. The head is milled with two cut surfaces for easy tightening with a wrench.

Claims

1. A universal generator test connection transmission device, characterized in that: It includes an inner boss connection plate, a transmission pin, a first elastic sleeve, a second elastic sleeve, a transition plate, a special nut, a self-made screw pin, a screw and a stop screw; the inner boss connection plate includes an annular first plate body, four arc-shaped notches evenly arranged on the outer ring of the plate body, a number of large holes evenly arranged between adjacent notches and penetrating the first plate body, a boss arranged in the middle of the large hole, and a keyway arranged on the inner wall of the first plate body and matched with the stop key; the inner hole at the center of the first plate body is heat-shrink-fitted onto the drag machine shaft, and the first elastic sleeve and the second elastic sleeve are arranged inside the large hole of the inner boss connection plate, and are divided into The transition plate comprises an annular second plate body, threaded holes symmetrically arranged on the second plate body, through holes symmetrically arranged on the second plate body, and holes evenly arranged between adjacent threaded holes and through holes and corresponding to the large holes on the first plate body; the transmission pin passes through the hole, the second elastic sleeve, the boss and the first elastic sleeve in sequence, and the transmission pin is fastened by a special nut and a stop screw, the self-made screw pin passes through the threaded hole from the notch of the inner boss connection plate and is inserted into the pin hole of the rotor dynamic balancing connection plate, and the screw passes through the through hole from the notch to connect with the dynamic balancing connection plate; The self-made screw pin comprises a screw pin rod and a screw pin head arranged at the top of the screw pin rod; the screw pin rod comprises a threaded portion and a cylindrical pin portion arranged below the threaded portion, and the end of the cylindrical pin portion is chamfered; The special nut includes a nut body and a screw hole passing through the nut body; the nut body includes a tail, a head located above the tail and with a smaller diameter than the tail, a horizontally arranged stop threaded hole cooperating with a stop screw is provided on the side of the head, and a section cooperating with a wrench is opened on the outer side of the head.

2. The universal generator test connection transmission device according to claim 1, characterized in that: The transmission pin and the transition plate are in interference connection, so as to prevent the transmission pin from rotating when the special nut is tightened.

3. The universal generator test connection transmission device according to claim 1, characterized in that: The screw head is a cylindrical head with a square hole, and the square hole is convenient for tightening with a torque wrench.

4. The universal generator test connection transmission device according to claim 1, characterized in that: The bottom of the tail is cylindrical, the middle of the tail is inclined toward the connection with the head, and the head and the tail are integrated into an integrated design.

5. The universal generator test connection transmission device according to claim 1, characterized in that: The first disk body is provided with a plurality of lifting holes for lifting or turning.

6. The universal generator test connection transmission device according to claim 1, characterized in that: The outer diameters of the first elastic sleeve and the second elastic sleeve are 0.3-0.5 mm smaller than the diameter of the large hole.

7. The universal generator test connection transmission device according to claim 1, characterized in that: The boss is in a hollow ring shape and is arranged on the inner wall of the large hole.

8. The universal generator test connection transmission device according to claim 1, characterized in that: The second elastic sleeve is installed in the large hole, and its tail protrudes 3mm from the surface of the inner boss connecting disk.

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