To answer your question I am using a few assumptions. If you have a html website and a wordpress blog I am guessing that your blog is a subdomain or a wordpress.com domain. Using either of these scenarios the simple answer if yes it will affect your rankings.
Both a sub domain and a wordpress.com blog are treated as separate websites to your main website. To really take advantage of any blog activity, deep backlinks, SEO etc etc you should be trying to post your blogs to your main website i.e www.yourdomain.com/blog. All roads lead to "ROME", this gives you the best opportunity to increase your domain and social internet standing. Hope this makes sense and helps.
