Die for machining pin hole of coupling shaft of impact type hydraulic generator

Abstract

The utility model discloses a die for machining a coupling pin hole of an impact type hydro-generator. The die is composed of a boring die plate, a first positioning sleeve, an adjusting plate and a transition stud. The boring die plate is used for machining inner flange type shafts and rotor support coupling pin holes, the convex spigot and the concave spigot of the boring die plate are matched with the rotor support and the concave spigot and the convex spigot of a main shaft respectively and fixed through a screw or a transition stud, the coupling pin holes are bored according to the positions of the boring die plate positioning holes, the position degree of the pin holes after machining can be effectively guaranteed, and machining precision is improved. A traditional process method that the rotor support and the main shaft are drilled and hinged at the same time after being coupled is broken through, the design and manufacturing types of shafts are widened, the problem that the rotor support and the main shaft are manufactured at different places can be solved, the transportation cost is reduced, and the machining quality can be guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of processing and manufacturing water turbine generators, and relates to a die for processing coupling pin holes of impact type water turbine generators. Background Art

[0002] In the past, the machining of the rotor bracket and the main shaft coupling pin hole usually adopts the method of fixing the rotor bracket and the main shaft axis with coupling bolts after they are adjusted to meet the requirements, and then boring the coupling pin hole using a movable boring machine or a simple boring machine. The advantage of this machining method is that it can ensure that the axis of the rotor bracket and the main shaft after coupling meets the requirements after the coupling pin hole is machined. The disadvantage of this machining method is that it has high requirements for the operating space after the rotor bracket and the main shaft are coupled. For the main shaft with an internal flange structure, there is no space for boring operation after the coupling. Utility Model Content

[0003] The purpose of the utility model is to disclose a mold for processing the coupling pin holes of the rotor bracket and the main shaft of an impact turbine generator. For the main shaft with an inner flange structure, the coupling pin holes on the main shaft and the rotor bracket can be processed separately, effectively ensuring the position of the holes, so that after the rotor bracket is coupled to the main shaft, the axis swing meets the design requirements.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: it consists of a boring template, a first positioning sleeve, an adjustment plate, and a transition stud. The first positioning sleeve and the boring template are matched with a small gap. Four adjustment plates are set at 90° intervals on the inner circle side of the boring template. The adjustment plate and the boring template are connected by bolts.

[0005] As a preferred solution of the present invention, a concave stop is provided on one end face of the boring template, a convex stop is provided on the other end face, a plurality of high-precision positioning holes are opened on the circumference, a first bolt hole is provided between the positioning holes, a second bolt hole is provided near the inner circle, a measuring hole is provided near the pitch circle of the concave stop and the convex stop, 4 horizontal hanging threaded holes are provided near the outer circle, and 4 vertical hanging threaded holes are provided on the outer circle.

[0006] As a preferred embodiment of the present invention, the first positioning sleeve includes a handle, a first rib, a second positioning sleeve, and a second rib. The handle and the second positioning sleeve are welded into a whole after being combined. The first rib is installed on the upper end of the inner circle of the second positioning sleeve and welded into a whole. The second rib is installed on the lower end of the inner circle of the second positioning sleeve and welded into a whole.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] The utility model comprises the following steps: a convex stop and a concave stop provided on a boring template are matched with the concave stop of a rotor bracket and the convex stop of a main shaft respectively; a measuring hole on the boring template is used to check the stop gap between the boring template and the rotor bracket or the main shaft; the stop gaps at four points are measured at 90° intervals on a circumference; an adjustment plate is used to adjust the boring template axially and radially to make the point gaps consistent; the boring template is fixed to the rotor bracket or the main shaft with bolts, nuts and washers; and the coupling pin hole of the rotor bracket or the main shaft is processed with the positioning hole of the boring template as a reference.

[0009] The utility model requires that three pin holes be bored at the same time first, and the three pin holes are spaced 120 degrees apart. After each pin hole is processed, the size of the pin hole is measured, and the outer circle of the first locating sleeve is matched according to the measured size of the pin hole, so that the gap between the first locating sleeve and the pin hole is between 0.02-0.03mm. The three processed pin holes are limited by the first locating sleeve to the position of the boring template and the rotor bracket or the main shaft to prevent mutual movement and cause pin hole position deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Dies for machining rotor bracket and spindle coupling pin holes.

[0011] Figure 2 It is the first positioning sleeve.

[0012] Figure 3 Plane view for boring template.

[0013] Figure 4 This is the top view of the boring template.

[0014] Description of component numbers in the accompanying drawings:

[0015] 1. Boring template; 2. First locating sleeve; 3. Bolt; 4. Adjustment plate; 5. Screw; 6. Screw rod; 7. Nut; 8. First washer; 9. Second washer; 10. Transition stud; 11. Rotor bracket; 12. Spindle; 13. Handle; 14. First rib plate; 15. Second locating sleeve; 16. Second rib plate; 17. Concave stopper; 18. Convex stopper; 19. Locating hole; 20. First bolt hole; 21. Second bolt hole; 22. Measuring hole; 23. Horizontal hanging bolt hole; 24. Vertical hanging bolt hole. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the embodiments.

[0017] The following examples are intended to illustrate the present invention and are not intended to limit the scope of protection of the present invention. The conditions in the examples may be further adjusted according to specific conditions. Simple improvements to the present invention based on the concept of the present invention fall within the scope of protection claimed by the present invention.

[0018] like Figure 1-3The mold shown is for processing the coupling pin hole of an impulse turbine generator, comprising a boring template 1, a first positioning sleeve 2, an adjustment plate 4, and a transition stud 10. A concave stop 17 is provided on one end face of the boring template 1, and a convex stop 18 is provided on the other end face. A plurality of high-precision positioning holes 19 are provided on the circumference, a first bolt hole 20 is provided between the positioning holes 19, a second bolt hole 21 is provided near the inner circle, a measuring hole 22 is provided near the pitch circle of the concave stop 17 and the convex stop 18, four horizontal hanging threaded holes 23 are provided near the outer circle, and four vertical hanging threaded holes 24 are provided on the outer circle.

[0019] The boring plate 1 and the rotor support 11 or the main shaft 12 are limited in radial movement by the concave stop 17 or the convex stop 18 , and are limited in axial movement by the first bolt hole 20 and the screw rod 6 or the transition stud 10 .

[0020] The first positioning sleeve 2 includes a handle 13, a first rib 14, a second positioning sleeve 15, and a second rib 16. The handle 13 and the second positioning sleeve 15 are welded into a whole after being put together. The first rib 14 is installed on the upper end of the inner circle of the second positioning sleeve 15 and welded into a whole. The second rib 16 is installed on the lower end of the inner circle of the second positioning sleeve 15 and welded into a whole. The outer circle of the upper end of the first positioning sleeve 2 is matched with the positioning hole 19 of the boring template 1, and the gap is 0.02-0.03mm. The outer circle of the lower end is matched with the pin hole processed by the rotor bracket 11 or the main shaft 12, and the gap is 0.02-0.03mm, which further limits the relative position of the boring template 1 and the rotor bracket 11 or the main shaft 12.

[0021] Working principle: When the utility model is used to process the coupling pin holes of the rotor bracket 11 and the main shaft 12, the adjustment plate 4, the screw 6 and the transition stud 10 are used to adjust and fix the relative position of the boring template 1 and the rotor bracket 11 or the main shaft 12. Three pin holes are first processed at intervals of 120° in the circumferential direction. According to the actual measured dimensions of the processed pin holes, the first locating sleeve 2 is equipped. The equipped first locating sleeve 2 is correspondingly installed into the three pin holes to further limit the relative position of the boring template 1 and the rotor bracket 11 or the main shaft 12. The remaining coupling pin holes are processed with the locating hole 19 on the boring template 1 as the reference. The coupling pin holes are numbered according to the number of the locating hole 19 on the boring template 1 to ensure that the position of the coupling pin holes is consistent.

[0022] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A die for machining coupling pin holes of an impact turbine generator, characterized in that: The invention comprises a boring plate (1), a first positioning sleeve (2), an adjustment plate (4), and a transition stud (10). The first positioning sleeve (2) and the boring plate (1) are matched with each other with a small gap. Four adjustment plates (4) are respectively arranged on the inner circle side of the boring plate (1) at intervals of 90 degrees. The adjustment plates (4) and the boring plate (1) are connected by bolts (3).

2. The die for machining coupling pin holes of an impact turbine generator according to claim 1, characterized in that: The boring template (1) is provided with a concave stop on one end face and a convex stop on the other end face, and a plurality of high-precision positioning holes are provided on the circumference, a first bolt hole is provided between the positioning holes, a second bolt hole is provided near the inner circle, a measuring hole is provided near the pitch circle of the concave stop and the convex stop, four horizontal hanging threaded holes are provided near the outer circle, and four vertical hanging threaded holes are provided on the outer circle.

3. The die for machining coupling pin holes of an impact turbine generator according to claim 1, characterized in that: The first positioning sleeve (2) comprises a handle (13), a first rib plate (14), a second positioning sleeve (15), and a second rib plate (16). The handle (13) and the second positioning sleeve (15) are welded together to form a whole. The first rib plate (14) is installed on the upper end of the inner circle of the second positioning sleeve (15) and welded to form a whole. The second rib plate (16) is installed on the lower end of the inner circle of the second positioning sleeve (15) and welded to form a whole.

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