Self-centering blind mate fluid coupling
A coupling member for a blind mate fluid coupling includes a housing and a valve body that is self-centering and alignable relative to the housing. The valve body may include at least two radial shoulder portions that are configured to engage at least two corresponding radial abutments of the housing to improve self-centering when in a decoupled state. An engagement member, such as a socket, may be provided in the housing to engage a radial shoulder of the valve body with a concave interface to enhance the misalignment compensating and/or self-centering functionality. The engagement member may be free to float radially relative to the housing to further enhance such effects. A compensator that urges an engagement member against a shoulder of the valve body may be provided to compensate for misalignment and/or provide self-centering in both a decoupled and mated state.
1. A coupling member for a blind mate fluid coupling, comprising:
a housing surrounding a longitudinal axis;
a valve body at least partially extending through the housing, the valve body having an axially extending internal fluid passage;
a valve member at least partially disposed in the internal fluid passage, the valve member being movable relative to the valve body to open and close the internal fluid passage; and
an alignment mechanism including a movable engagement part that is radially movable in a radial direction relative to the housing and the longitudinal axis, wherein the alignment mechanism is configured to cooperate with the valve body to facilitate at least radial alignment and/or centering of the valve body,
wherein the movable engagement part comprises a floating ring that floats radially relative to the housing and cooperates with the housing as a stop to axially rearward movement of the vale body relative to the housing.
2. The coupling member according to claim 1 , wherein the engagement part cooperates with the valve body via a concave interface to facilitate angular alignment and/or centering.
3. The coupling member according to claim 2 ,
wherein the engagement part is adapted to engage a rearwardly facing surface of the valve body via the concave interface at least when the coupling member is in a connecting state with a corresponding other coupling member of the blind mate coupling.
4. The coupling member according to claim 3 , wherein the engagement part has a concave bearing surface that is configured to engage a complementary convex mating surface of a portion of the valve body.
5. The coupling member according to claim 4 , wherein the bearing surface of the engagement part and the mating surface of the valve body are each configured as spherical surfaces.
6. The coupling member according to claim 1 ,
wherein the ring has an opening through which the valve body extends, the ring having a cupped surface that is adapted to engage a corresponding cupped shoulder surface of the valve body,
the alignment mechanism further including a second radially floating ring, wherein the floating ring and the second floating ring are each radially movable and configured to cooperate with the housing and each other to serve as a radially movable stop.
7. The coupling member according to claim 1 , wherein the alignment mechanism includes a compensator having a biasing member that urges the valve body and the engagement part together to compensate for misalignment of the valve body.
8. The coupling member according to claim 7 , wherein the biasing member has a biasing force that is configured such that the engagement part disengages from a shoulder of the valve body when the coupling member is being disconnected from a corresponding other coupling member of the blind mate coupling.
9. The coupling member according to claim 1 , wherein the engagement part is an intermediate engagement part of an intermediate alignment assembly of the alignment mechanism, the alignment mechanism further including a forward alignment assembly including a forward part that is axially movable relative to the housing and cooperates with the valve body to facilitate alignment and/or centering of the valve body.
10. The coupling member according to claim 9 , wherein the forward alignment assembly includes a biasing spring that biases the forward part in a rearward direction toward a forwardly facing shoulder surface of the valve body.
11. The coupling member according to claim 10 , wherein the forward alignment assembly further includes a forward engagement part that is radially movable relative to the housing and is configured to engage the forwardly facing shoulder surface of the valve body.
12. The coupling member according to claim 10 , wherein the axially movable forward part includes a sleeve portion that is slidably movable in the housing and forms a spring chamber that at least partially contains the biasing spring.
13. The coupling member according to claim 11 , wherein the alignment mechanism is configured such that the forward engagement part always engages the forwardly facing shoulder surface of the valve body.
14. The coupling member according to claim 11 , wherein the forward engagement part engages a forwardly facing shoulder surface of the valve body, the forwardly facing shoulder surface including an inclined portion that is extends radially outwardly and axially rearwardly relative to a longitudinal axis of the valve body.
15. The coupling member according to claim 11 , wherein the forwardly facing shoulder surface further includes a vertical portion that is radially outward of the inclined portion.
16. The coupling member according to claim 11 , wherein the alignment mechanism further includes a rearward engagement part that forms a fixed stop having a radially inwardly and axially rearwardly extending surface that cooperates with the valve body to facilitate alignment and/or centering.
17. The coupling member according to claim 16 ,
wherein the valve body includes a radially protruding first abutment and a radially protruding second abutment axially spaced apart from the first abutment;
wherein the first abutment is configured to engage the forward engagement part and the intermediate engagement part, and wherein the second abutment is configured to engage the rearward engagement part.
18. The coupling member according to claim 1 , wherein the movable engagement part is movable relative to the valve body.
19. The coupling member according to claim 1 , wherein the movable engagement part is radially movable in a radial direction such that a center of the movable engagement part can move away from the longitudinal axis of the housing.
20. A coupling member for a blind mate fluid coupling, comprising:
a housing surrounding a longitudinal axis;
a valve body at least partially extending through the housing, the valve body having an axially extending internal fluid passage;
a valve member at least partially disposed in the internal fluid passage, the valve member being movable relative to the valve body to open and close the internal fluid passage; and
an alignment mechanism including a movable engagement part that is radially movable in a radial direction relative to the housing and the longitudinal axis, wherein the alignment mechanism is configured to cooperate with the valve body to facilitate at least radial alignment and/or centering of the valve body,
wherein the engagement part is a ring having an opening through which the valve body extends, the ring having a cupped surface that is adapted to engage a corresponding cupped shoulder surface of the valve body,
the alignment mechanism further including a second radially floating ring, wherein the engagement part and floating ring are each radially movable and configured to cooperate with the housing and each other to serve as a radially movable stop.