Afraid this post is gonna be ‘dull as dishwater’ to most peeps, for I’ve spent most of the day under the Subaru or stood on the back of a quad!
Henry wrecked it
It was ‘pure pish’ here at the ‘North End’ early on so I spent most of the morning inside the shed working on wifey’s egg chariot. Mainly finishing fitting the wheel bearings and removing rusted bolts from the rear bumper mountings. The ‘Old Girl’ is going to have to have a new bulkhead this year and that’s a major job. I had seriously considered putting her away and paying to have the job done, it’s a lot of work and I’m hardly blessed with much in the way of spare time. I’d even considered getting a sensible vehicle like Lachie’s Ranger or any one of the other Japanese ‘crew cabs’. Truth is that, sure enough I’d get a decent heater, good fuel economy, dry cab, air conditioning and a radio I could here over 40MPH but I’d have to spend at least £5K, in three years time it would be worth ‘feck all’ and I’d be needing to change the ‘DMF’ and ‘DPF’, that’ll be the dual mass flywheel and diesel particulate filter. So, better ‘the devil you know’ and I couldn’t see any of those Jap jobbies pulling 9 tons of telehandler out of a bog.
I was removing all the bolts and fittings around the stern of the Subaru and lashing Coppaslip on them so they’d be easy to do when I fitted the tow bar. My logic being that if I’m gonna change the bulkhead myself then I’d better still have something capable of towing a trailer or caravan whilst the ‘Old Girl’ is in hospital so to speak. I’ve not actually mentioned this to the ‘Post Lady’ just yet but I’m sure she’ll understand.
The main task of the day had to wait until the rain stopped, and that was removing the fried stator from my Proven/Kingspan wind turbine. The staggering output it had been achieving throughout all the storms of late had burnt out the stator, or ‘core’ as Kingspan prefer to call it.
Removing a Kingspan/Proven stator/core
The stator/core is the bit of an ‘axial flux’ generator that sits between the two rotating sets of magnets. On a Proven/Kingspan downwind machine it sits behind the black cover at the opposite side from the blades.
Normally when you lower the turbine that bit points ‘up the way’
making access difficult but I’d already removed all the blades so it would rest ‘doon the way’. This is all ‘damn fine splendid’ until you remove the first rotor when the reduced weight wants to make the machine ‘point up the way’ again So, here’s what I did, first off I got a puller rigged up, to remove the rotor from the shaft. The Proven/Kingspan has some holes near the spindle that are large enough to get 12mm ‘plate washers’ inside.
I used 2 for each 12mm threaded bar cos I figured it would be ‘effin tight’.
I then secured a hydraulic puller between the studs and started to remove the outer rotor, as predicted it was very stubborn but eventually came off.
As I was working upside-down so to speak I tied some 6mm rope around the rotor to prevent it falling off. Just as well really as the loss of ‘ballast’ would have caused the head to swivel round. To prevent this I drilled the rock bellow the head and then secured it with a couple of ratchet straps.
Not only did this secure the head and prevent it from swinging around but the two straps also also gripped the sides of the stator/core and acted as a brake. The core weighs about 30kg at a guess and is mechanically secured to the galvanized frame with six M8 studs. However it is magnetically held to the second rotor and extreme care must be exercised in it’s removal or you could end up loosing some fingers. It is possible using sever screw drivers to ease off a little at a time but I used a ‘cunning plan’, sadly I never took a picture, I used my 900mm Snap On ‘strong arm’ bar with a socket on the end. The socket I placed on one of the two metal bars of the frame to act as a fulcrum whilst the bar rested on top of one of the studs. I then carefully eased it downwards and put a wooden wedge underneath between the the frame and core. With a good air gap at that end the rest were simple enough to pry down. I used screwdrivers but great care must be observed so as not to damage the core/stator or your fingers.
As you can see it’s toasted,
the magnets however are just fine, a few scuff marks and one small chip.
I’ve organised another stator/core from Kingspan Wind who have been extremely helpful with this and other matters in the past. A far cry from the way Proven Energy dealt with their customers latterly. From what I can gather most of the staff are the same, Kingspan obviously have a better ‘customer care ethic’ than the previous management.
Fancy the life ‘off grid’
Well, that’ll be me neighbours in ‘Number 3’ now for over a year.
They’ve done loads of work on the croft whilst Donnie Macleod of DDK design and Billy Shanks of Shanks Plumbing and Renewables have done loads of work on the house to make it suitable for letting. So the ‘wee hoose’ that was my home for over a quarter of a century is now available for let https://www.airbnb.co.uk/rooms/8188794?s=3LQkEta2 I could fancy a holiday there myself Nicky, Maya and Mary can be contacted on 01478 660 375 or emailed at firstname.lastname@example.org