A special vow called the vow of a Nazarite is mentioned in Numbers 6:2 and the conditions of the vow are spelled out as the chapter follows. Verse 8 says, "Throughout the period of their dedication, they are consecrated to the Lord." But it doesn't seem to specify a purpose for which they are consecrated.
From the description here in numbers, it reminds me of the desert monks, and I think of a holy hermit or some such. But the two characters in the Hebrew Bible that seem to be Nazarites—Samson and Samuel—don't exactly give off that picture. Indeed, if they have anything in common it is they seem to be holy warriors in their roles as judges: Samson known, of course, for slaying Philistines and Samuel too being victorious over Philistine armies (1 Samuel 7).
Of course Samson is a dubious model for probably anything, but especially here as a Nazarite given that he eats the honey out of the carcass of a lion and as he flirts with his hair being shaved. Further one wonders even with Samuel how you could refrain from contact with dead bodies while making war against Philistine armies.
So what was the Nazarite vow for? For what end did it consecrate you to?