| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump capable of preventing fluid in a high pressure portion from leaking into a low pressure portion from between an end portion of a second seal member and a first seal member.SOLUTION: A space between joined surfaces 18, 20 joined to each other is sealed by a first seal member 23 which prevents fluid from leaking from an inside to an outside of a casing and a second seal member 28 which separates a low pressure portion from a high pressure portion. The second seal member 28 is fitted in a second seal groove 29. One end portion of the second seal member 28 abuts a lateral side of the first seal member 23. The second seal member 28 includes: a deforming portion 31 which, in a state where casing bodies 14, 15 are separated from each other, protrudes from the second seal groove 29 onto the joined surface 20 and is easily compress-deformed in a height direction thereof; and a restriction portion 32 which is in contact with an inner surface of the second seal groove 29 and is not easily expansion-deformed in lateral and bottom directions thereof. |
