汉语拼音中的18个辅音如下：

1. /p/ - Pinyin: p, Example: "pig"

2. /b/ - Pinyin: b, Example: "ball"

3. /t/ - Pinyin: t, Example: "cat"

4. /d/ - Pinyin: d, Example: "dog"

5. /k/ - Pinyin: k, Example: "kick"

6. /g/ - Pinyin: g, Example: "go"

7. /f/ - Pinyin: f, Example: "fish"

8. /v/ - Pinyin: v, Example: "van"

9. /θ/ - Pinyin: θ （th in "think"）, Example: "think"

10. /ð/ - Pinyin: ð （th in "that"）, Example: "that"

11. /n/ - Pinyin: n, Example: "net"

12. /l/ - Pinyin: l, Example: "lamp"

13. /g/ - Pinyin: g, Example: "go"

14. /kh/ - Pinyin: kh, Example: "khan"

15. /ng/ - Pinyin: ng, Example: "sing"

16. /j/ - Pinyin: j, Example: "jar"

17. /q/ - Pinyin: q, Example: "queen"

18. /x/ - Pinyin: x, Example: "box"

这些辅音的发音部位和发音方法各不相同，可以分为双唇音、唇齿音、舌尖前音、舌尖中音、舌尖后音、舌面前音等。希望这些信息对你有所帮助。