Nova Patents
US3093084A

Pump

Abstract

This record has no abstract on file.

US3093084A, drawing sheet 1
Sheet 1 of 1

Term

Term ended

Expired 11 June 1980, 46.3 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

7 claims: 6 independent, 1 dependent

  1. 1
    What is claimed as new is; 3,093,084 PUMP George Derderian, 239 W. 8th St., Erie, Pa. Filed Feb. 21, 1961, Ser. No. 90,717 7 Claims. (Cl. 103—87) This invention is a centrifugal pump or compressor in which the blades are carried by a rotary housing surrounding a stationary diffuser section between the blades and the fluid outlet. It will pump any fluid, liquid or gas. Compactness is achieved by having the diffuser section extend radially inward from the tips of the blades. Other advantages are reduction in disc friction losses between the fluid and stationary parts of the pump, elimination of seals and reduction in slip between the fluid and the impeller blades. Two pumps may be mounted on opposite sides of a turbine rotor and used as a two propellant turbo pump system for rocket engines.. In the drawing, FIG. 1 is a longitudinal section through a preferred form of turbo pump and FIG. 2 is a section on ]jne 2__2 of FIG. 1 through one of the turbine buckets. The fluid to be compressed enters through an inlet 1 and is discharged through an outlet 2, the discharge being taken from an annular discharge structure 3 surrounding the inlet structure 4. The inlet and outlet form the part of a stationary structure supported by mounting flanges 5 and 6. . , , The inlet leads to impeller blades 7 earned by a rotatable housing 8 having axially spaced end walls 8a, 8b and a connecting peripheral wall 8c. The blades 7 are fixed to the end wall 8a with the inner ends adjacent the center of the housing and the outer ends adjacent the peripheral wall of the housing. The edges of the blade 7 remote from the wall 8a may be connected by a shroud 9 having a running clearance with a wall 10 of a toroidal section 11 fixed to the inlet structure 4. The parts 9 and 10 provide a labyrinth seal which prevents or minimizes leakage. The housing is rotated by a turbine wheel 12 fixed to wall 8a. The driving fluid for the turbine is supplied through an a...---- -------— - . rected toward the turbine buckets 15. The fluid being pumped is in contact with the hub of the turbine wheel . and acts as a coolant. This is a significant advantage in What is claimed as new is:. . gas turbines The turbine buckets are anchored in the . 1. A pump comprising a rotatable housing having furbine wheel by axially extending dovetails 15α as shown 45 axially spaced end walls facing each other and a pectin FIG 2 Axial displacement of the blades is prevented mg peripheral wall, impeller blades fixed to one of t ·*· * * . · · .·___i___1-. J ,τγ,4·Κ <r,nar anrlc a/lianAnt trip. /ΆΤΐίΡ.Γ OT tflfi TlOUS“ end walls with inner ends adjacent the center of the housing and outer ends or discharge tips adjacent said peripheral wall of the housing, a stationary central inlet struc50 ture conducting fluid to the inner ends of the blades, a stationary diffuser section having a shroud adjacent the other of the end walls and angularly spaced diffuser vanes adjacent said central inlet structure and extending from adjacent said peripheral wall back toward the center of the sented to the discharge tips of the blades, a stationary outlet structure conducting fluid from the center of the diffuser section, other blades fixed on said other end wall for returning toward said peripheral wall fluid which may of the diffuser section, and means for rotating the housing.
  2. 2
    A pump comprising a rotatable housing having axially spaced end walls facing each other and a connecting peripheral wall, a stationary structure including a part of said part and one of the end walls, said blades being fixed to said one of the end walls with inner ends adjacent the center of the housing and outer ends or discharge tips adjacent said peripheral wall of the housing, by the shoulders 8d on the housing. This is particularly advantageous when there is a compressor on each side of the turbine whel as contemplated in iFIG. 1, as this eliminates the use of bucket locking tabs. In passing through the blades 7, the fluid rotates at the same speed as the housing so that upon being discharged from the outer ends or tips 16 of the blades the fluid has a very considerable increase in energy. Part of the increase in energy i-------------- the greater part of the increase in energy will be the rotational energy of the fluid about the axis of the pump. In the region 20 between the tips 16 of the blades 7 and the diffuser vanes 17, the fluid is rotating at high velocity but since the casing is----- „ ‘ ' ’’ fluid, slip is minimized. Since there is negligible slip, the rotational energy of the fluid is recaptured by diffuser vanes 17 carried by wall 18 of the toroidal section. The outer tips 19 of the diffuser vanes 17 are presented to the usual manner so1 as to convert the rotational velocity of the fluid into static pressure. The inner ends of the vanes discharge to the annular pasageway 3 leading to the outlet 2. There is some the wall 8b of the rotating housing and the wall 22 attached to the diffuser vanes 17. This leakage is preLD1C miacaou ill ciicx&y. a a.iv vuv jv..—----rr , is due to centrifugal force but ordinarily 55 housing, the outer tips of the diffuser vanes being preIJ UMW V c «·_ _1______£ +1--. KI n4an o cdnhnn ΟΠΓ nntis rotating at the same speed as the 60 leak between said other end wall and the adjacent shroud . ,... , ,. .1 _ r xi. . Δΐ££_____~ — J «-μ ·Ρλγτ· T-rtinfr-n rr tinp ηΛΠδΙΤΊ V. outer tips ly or me auiusci vauc& a/ aic mv —& —·-- :,, . ,, < 5 , , . ___ discharge tips 16 of the blades 7 and are inclined in the 65 between said end walls impeller blades between one side ® * . ., . · i 1 _ ·+__ „r»f+ on/1 z-νηα rvP tlio Anri 1X7511 IS S3in nlan&S π&ΙΠ2Γ opportunity for leakage of liquid between 70 diffuser vanes between the other side of said part and the J - . , ., «« ΛΛ L -+1.-- —£ --.'4 ,τζοίΐο CQ-irl rliflPiiaAr VftTlAS nftlTKT nYftil to other of said end walls, said diffuser vanes being fixed to said part and extending from adjacent said peripheral wall
  3. 3
    3,093,084 back toward the center of the housing, the outer tips of the diffuser vanes being presented to the discharge tips of the blades, said blades and vanes being distributed about the axis of the pump, a shroud on said vanes having a running clearance with said other end wall, other im- 5 peller blades fixed on said other end wall for preventing leakage between said other end wall and the shroud of the diffuser vanes, and an inlet and an outlet in said stationary structure. 3. A pump comprising a rotatable housing, means for 10 rotating the housing, said housing having axially spaced end walls facing each other and a connecting peripheral wall, one of the end walls being closed and the other end wall having a central opening, a stationary structure extending through said central opening and having a part 15 disposed between said end walls, impeller blades disposed on one side of said part and diffuser vanes disposed on the opposite side of said part, said blades being fixed to one of the end walls with inner ends adjacent the center of the housing and outer ends or discharge tips adjacent 20 said peripheral wall of the housing, said vanes being fixed to said part and extending from adjacent said peripheral wall back toward the center of the housing, the outer tips of the diffuser vanes being presented to the discharge tips of the blades, said blades and vanes being distributed 25 about the axis of the pump, a shroud on said vanes having a running clearance with said other end wall, other impeller blades fixed on said other end wall for preventing leakage between said other end wall and the shroud wall of the diffuser vanes, and an inlet and an outlet in said 30 stationary structure.
  4. 4
    A turbo pump comprising a turbine wheel having buckets on its periphery, a rotatable pump housing having axially spaced end walls facing each other and a connecting peripheral wall, one of the end walls being fixed to 35 one side of said turbine wheel, a stationary structure including a part between said end walls, impeller blades between one side of said part and said one of the end walls, said blades being fixed to said one of the end walls with inner ends adjacent the center of the housing and 40 outer ends or discharge tips adjacent said peripheral wall of the housing, diffuser vanes between -the other side of said part and the other of said end walls, said diffuser vanes being fixed to said part and extending from adjacent said peripheral wall back toward the center of the 45 housing, the outer tips of the diffuser vanes being presented to the discharge tips of the blades, said blades and vanes being distributed about the axis of the pump.
  5. 6
    A turbo pump comprising a turbine wheel having buckets on its periphery, the buckets and wheel having axially facing dovetail connections, a rotatable pump housing having axially spaced end walls facing each other and a connecting peripheral wall, said housing being opposite said dovetail connections and blocking removal of the buckets from the wheel, one of the housing end walls being fixed to said wheel, a stationary structure including a part between said end walls, impeller blades between one side of said part and said one of the end walls, said blades being fixed to said one of the end walls with inner ends adjacent the center of the housing and outer ends or discharge tips adjacent said peripheral wall of the housing, diffuser vanes between the other side of said part and the other of said end walls, the outer tips of the diffuser vanes | being presented to the discharge tips of the blades, said diffuser vanes being fixed to said part and extending from adjacent said peripheral wall back toward the center of the housing, said blades and vanes being distributed about the axis of the pump.
  6. 7
    A pump comprising a rotatable housing having axially spaced end walls facing each other and a connecting peripheral wall, first impeller blades fixed to one of the end walls with inner ends adjacent the center of the housing and with outer ends or discharge tips presented toward the peripheral wall of the housing, a stationary central inlet structure conducting fluid to the inner ends of the first blades, a stationary diffuser section having fixed angularly spaced diffuser vanes extending from adjacent said peripheral wall back toward the center of the housing, the outer tips of the diffuser vanes being presented toward the discharge tips of the first blades, a stationary outlet structure conducting fluid from the center of the diffuser section, second impeller blades fixed to the other of said end walls and discharging toward the peripheral wall, second diffuser vanes fixed on said diffuser section and receiving the discharge of said second impeller blades and conducting the same toward the fluid discharged from said first impeller blades, and means for rotating the housing. References Cited in the file of this patent UNITED STATES PATENTS 220,108 Babbitt----------------Sept. 30, 1879 1,719,415 Back-------------------July 2, 1929 2,673,075 Borck________________Mar. 23, 1954 FOREIGN PATENTS 88,945 Switzerland____________Aug. 16, 1921 737,933 Great Britain____________Oct. 5, 1955
Independent claims6