CN201821196U - Generator - Google Patents

Abstract

The utility model belongs to the field of generators, in particular to a manufacturing process of a generator which is above 100W with the rotating speed of 1500r to 3600r. The utility model discloses a generator which comprises a rotor, a stator, an outer shell, a fan, an excitation device and a rear end cover; the structural essentials are as follows: the outer shell and the rear end cover are punched from steel sheets; the fixing holes of the rear end cover and an excitation stator are punched at the bottom of the outer shell; the bottom of the outer shell is respectively provided with the rear end cover and the excitation stator; the rotor is arranged on the rear end cover through a bearing; the rear end cover is provided with an air inlet hole; the top of the outer shell is provided with a fixed ring which is folded externally, and a fixed lug and the fixed hole which are matched with the power are punched on the circumference on the outer shell. The generator has the advantages that: by changing the processing techniques of the outer shell and the rear end cover, the outer shell combines the fixing frames of a front adapting flange, the outer shell and the stator and is punched and formed once through, so that the concentricity is improved, the axial distance of the whole generator is shortened, all indexes and performances of the generator are improved, the weight and the manufacturing cost are greatly reduced, the work efficiency is improved, and the heat is little.

Description

Generator

Technical field

The utility model belongs to generator, especially belongs to more than the hectowatt, and rotating speed is 1500 to forward 3600 manufacture crafts of transmitting motors to.

Background technology

Existing single shaft holds no-brush synchronous generator such as Fig. 1, Fig. 2, shown in Figure 3, by rotor 5, stator 6, shell 1, fan 8, excitation unit 2, preceding terminal pad 3, rear end cap 4, joint pin 7 is formed, the processing technology complexity, each component processing process is as follows: one, before terminal pad 3:1. do the husky moulds 4. of loam core 2. 3. dozens of profiles of oven dry with wooden model and loam cores 5. cast 6 are installed move back clear husky 7. annealing 8. of mould polishing 9. cars that sandblast, mill pattern in the processing 10., bore 8 installing hole 12. tappings that pattern on the connecting hole 11. that 12 installing holes joining with power and 6 and joint pin join gets out gas sheet 31; Two, rear end cap 4:1. plays husky mould 2. cast 3. of profile and moves back clear husky 4. annealing, 5. sandblasts of mould 6. turning of polishing and process the demanding position of a plurality of fit dimensions (as running in bearings, it is spacing that the excitation stator is installed, the unified face of 6 joint pins etc. is installed) 7. go up the connecting hole that pattern bores 6 joint pins, and bore 6 hole 9. tappings that the air inlet sheet is installed; Three, processing six roots of sensation joint pin 7:1. is with hole 5. tappings that pattern bores 4 installation shells in 3. tappings 4. of holing of 6 equally long joint pin 2. two of round steel turning; Four, shell 1 (dividing upper and lower two parts): 1. blanking and punching 2. moulding; Five, air inlet sheet 41:1. mould of plastics one-shot forming; Six, two give vent to anger sheet 31:1. blanking flush gas, installing holes.

The assembling of each parts: 6 joint pins 7 are evenly welded in the outer ring at stator 6, and joint pin 7 is connected with preceding terminal pad 3, rear end cap 4 by bolt.Preceding terminal pad 3, joint pin 7,4 three parts of rear end cap are formed the stator skeleton of a generator (for set bolt, joint pin 7 diameters will be above 12 millimeters), two give vent to anger sheet 31 be locked in before the both sides of terminal pad 3, air inlet sheet 41 is fixed on the rear side of rear end cap 4, shell about in the of 1 two parts be installed on the joint pin 7.Brace 9, fan 8, rotor 5, excitation rotor 2, bearing 16 are installed after being assembled into rotor assembly 5.Armature spindle 51 links to each other with rear end cap 4 by bearing 16, and brace 9 joins with the flywheel of power.The concentricity of rotor 5 and stator 6 is subjected to the influence of joint pin 7, preceding terminal pad 3 and rear end cap 4 machining accuracies, because joint pin 7 will adopt the high-temperature electric arc weldering for the welding between cylindrical and stator, this will cause joint pin 7 distortion, concentricity to generator unit stator and rotor produces adverse influence, in order not produce interference, manufacturer has mostly strengthened the gap between each parts, the every index of generator that strengthened gap affects, generate heat easily when making generator operation, also influence life of generator.

Summary of the invention

The utility model purpose is to overcome the shortcoming that above-mentioned generator exists, and provides a kind of to stator concentricity, the less stator installing mechanism of precision influence, significantly reduces complete machine weight, manufacturing cost, the few generator of caloric value during operation.

The technical scheme that the utility model adopted is a kind of generator, include rotor, stator, shell, fan, excitation unit, rear end cap, its structural feature is that outer casing bottom dashes the fixing hole of rear end cap, excitation stator, outer casing bottom is installed rear end cap and excitation stator respectively, armature spindle by Bearing Installation on rear end cap, have air admission hole on the rear end cap, the retainer plate of oriented 90 degree that turn up in the top of shell, its circumference upper punch has match with power fixed lobe and fixing hole, and there are a plurality of ventholes its side.

Retainer plate directly links to each other with the power flywheel terminal pad, has omitted preceding terminal pad.

Circumferential direction inside at shell evenly is furnished with greatly, equals two fixedly muscle, and fixedly the outer ring of formed installed surface of muscle and stator is an interference fit.Interference fit has guaranteed mounting stability.

Stability when installing for stator, when fixedly muscle was two, every sectional area was at least 1/24th of circumferential area.Optimal selection is three.

The fixedly muscle of making the above can stretch together with shell and form, because the fixedly muscle and the shell one-off drawing of shell form, the concentricity that need not weld generator unit stator and rotor there is not influence; Also can be to be formed by a hollow-core construction and shell spot welding, spot welding be less to the concentricity influence.Described hollow-core construction can be for falling " U " i.e. " " or be " mouth " font or " " font of not sealing for the lower end etc.

Outer casing bottom has the interval evenly to become 90 degree to the shoulder block that turns up with the bottom, form the positioning retainer ring of rear end cap, the fixing hole of rear end cap is in the outside of positioning retainer ring, the fixing hole of excitation stator is in the inboard of positioning retainer ring, the external diameter of positioning retainer ring matches with the internal diameter of rear end cap, and the internal diameter of positioning retainer ring matches with the excitation stator outer diameter.

Particularly to make be to adopt steel plate punching stretch technology for its shell, rear end cap: one, shell: 1. blanking 2. drawing and formings 3. cut port dash install, location hole 4. turns over centring ring 6. towards excitation stator installing hole 5. and goes out pore; Two, rear end cap: 1. blanking 2. drawing and formings 3. edge-cutting and hole-punching band flange 4. are rushed in pore

Its assembling process is: shell carries out surface treatment (spraying paint or plastic-blasting), and------the excitation stator is installed, and----dress rear end cap----is put into rotor assembly (comprising brace, fan, rotor, excitation rotor, bearing) to be pressed into stator.

Fan inwardly is installed on the stator outside.Owing to cancelled preceding terminal pad and 6 joint pins, axially accessible between fan and stator, so fan can directly be installed on the outside on stator top, makes the complete machine axial distance shorten 30%, also improved radiating effect simultaneously.

Advantage of the present utility model is, by changing the processing technology of shell and rear end cap, make shell integrate the fixed mount of preceding terminal pad, shell, stator, one time punching molded, help improving concentricity, fan can directly be installed on the outside on stator top, the complete machine axial distance is shortened, the application of positioning retainer ring makes that also the axiality of shell and rear end cap is ensured, improve every index performance of generator, significantly reduce weight, manufacturing cost, improve work efficiency, caloric value is few during generator operation.

Description of drawings

Fig. 1 is existing generator principle structural representation

Fig. 2 is the left view of Fig. 1

Fig. 3 is the outward appearance rearview of Fig. 1 for existing generator schematic diagram

Fig. 4 is the utility model theory structure schematic diagram

Fig. 5 is shell and rear end cap constitutional diagram

Fig. 6 is shell and rear end cap combination stereogram

Fig. 7 is the shell stereogram

Fig. 8 is the upward view of Fig. 7

Fig. 9 is the stereogram of rear end cap

Wherein: 1 shell, 11 bottoms 12 are terminal pads 31 sheet 32 ventholes 4 rear end caps 41 air inlet sheets 42 fixing holes 43 fixing holes 44 air admission holes 5 rotors 51 armature spindles 6 stators 7 joint pins 8 fans 9 braces of giving vent to anger before the stator 3 of muscle 13 protruding 14 retainer plates, 15 shoulder blocks, 16 bearings, 17 bearing caps, 2 excitation units, 21 excitation units fixedly

Embodiment

Below in conjunction with view the utility model is described in detail

As Fig. 4--shown in Figure 9, a kind of generator, include rotor 5, stator 6, shell 1, fan 8, excitation unit 2, evenly be furnished with fixedly muscle 12 (as long as equal two greatly in the circumferential direction inside of shell 1, energy stable support stator is just), when fixedly muscle 12 was two, every sectional area was at least 1/24th of circumferential area, optimal selection is three, and present embodiment is four.Fixedly the outer ring of muscle 12 formed installed surfaces and stator 6 is an interference fit, fixedly muscle 12 can stretch with shell or be stamped to form together, as Fig. 7, shown in Figure 8, also can form by a hollow-core construction and shell spot welding, as shown in Fig. 5, Fig. 6, fall " U " font, i.e. " " shape, or be " mouth " font or the hollow-core constructions such as " " font of not sealing for the lower end, axially accessible between fan and stator, fan 8 is installed on stator 6 outsides.Shown in Fig. 5,6,8, shell 1, rear end cap 4 adopt steel plate punching stretch technology to be stamped to form, the bottom 11 of shell 1 dashes the fixing hole 42 of rear end cap 4 and the fixing hole 43 of excitation stator 21, bottom 11 has even at interval and becomes 90 degree to form the positioning retainer rings of rear end caps to the shoulder block 15 that turns up with the bottom, the fixing hole 42 of rear end cap 4 is in the outside of positioning retainer ring, the fixing hole 43 of excitation stator 21 is in the inboard of positioning retainer ring, the external diameter of positioning retainer ring matches with the internal diameter of rear end cap 4, and the internal diameter of positioning retainer ring matches with the excitation stator outer diameter.Bottom 11 is separately installed with rear end cap 4 and excitation stator 21, armature spindle 51 is installed on the rear end cap 4 by bearing 16, and seal by bearing cap 17, air admission hole 44 is arranged on the rear end cap 4, the retainer plate 14 of oriented 90 degree that turn up in the top of shell 1, its circumference upper punch has and is no less than 3 match with power fixed lobe 13 (shown in Fig. 6,7) and 12 fixing holes, has cancelled preceding terminal pad and 6 joint pins, and its side dashes a plurality of ventholes 32.

The manufacture craft of shell 1, rear end cap 4 is: one, shell: 1. blanking 2. drawing and formings 3. cut that port dash to be installed, location hole 4. turns over centring ring 6. towards excitation stator installing hole 5. and goes out pore 32; Two, rear end cap: 1. blanking 2. drawing and formings 3. edge-cutting and hole-punching band flange 4. are rushed in pore 44.

Its assembling process is: shell is carried out surface treatment (spraying paint or plastic-blasting)--be pressed into stator----install excitation stator----pack into rotor assembly (comprise fixedly connected 9, fan 8, rotor 5, excitation rotor, bearing, its structure is with existing identical, but axial length shortens)----cover bearing cap 17.

Motor with 12kw is an example, compares with the motor of existing famous brand name, and the utility model has significant advantage:

Specification/title	The Stamford	Li Laisenma	The utility model
				Length	400mm?	420mm?	300mm?
Weight kg	100?	105?	75?
				Production Time	＞4 hours	＞4 hours	＜0.5 hour
Manufacture craft	Casting, turnning and milling, brill, tapping, welding, punching press	Casting, turnning and milling, brill, tapping, welding, punching press	Die stamping, spot welding nut

Comparing result: advantage is very obvious, and it is more obvious that length reduces 30%, 85% batch process advantage is saved in weight saving 25%, time.

Claims (6)

1. generator, include rotor (5), stator (6), shell (1), fan (8), excitation unit (2), rear end cap (4), it is characterized in that, shell (1) bottom (11) dashes the fixing hole (42) of rear end cap (4) and the fixing hole (43) of excitation stator (21), shell (1) bottom (11) is installed rear end cap (4) and excitation stator (21) respectively, armature spindle (51) is installed on the rear end cap (4) by bearing (16), have air admission hole (44) on the rear end cap (4), the retainer plate (14) of oriented 90 degree that turn up in the top of shell (1), its circumference upper punch has match with power fixed lobe (13) and fixing hole, and there are a plurality of ventholes (32) its side.

2. a kind of generator according to claim 1 is characterized in that, evenly is furnished with at least two fixedly muscle (12) in the circumferential direction inside of shell (1), and fixedly the outer ring of formed installed surface of muscle (12) and stator (6) is an interference fit.

3. a kind of generator according to claim 2 is characterized in that, described fixedly muscle (12) is to stretch together with shell to form.

4. a kind of generator according to claim 2 is characterized in that, described fixedly muscle (12) is to be formed by a hollow-core construction and shell spot welding.

5. a kind of generator according to claim 1, it is characterized in that, shell (1) bottom (11) has even at interval and becomes 90 degree to form the positioning retainer rings of rear end cap (4) to the shoulder block that turns up (15) with the bottom, the fixing hole (42) of rear end cap (4) is in the outside of positioning retainer ring, the fixing hole (43) of excitation stator (21) is in the inboard of positioning retainer ring, the external diameter of positioning retainer ring matches with the internal diameter of rear end cap (4), and the internal diameter of positioning retainer ring matches with the excitation stator outer diameter.

6. a kind of generator according to claim 1 is characterized in that, fan (8) is installed on the stator outside.

Images