WO2004059130A1 - 回転流体機械 - Google Patents
回転流体機械 Download PDFInfo
- Publication number
- WO2004059130A1 WO2004059130A1 PCT/JP2003/016481 JP0316481W WO2004059130A1 WO 2004059130 A1 WO2004059130 A1 WO 2004059130A1 JP 0316481 W JP0316481 W JP 0316481W WO 2004059130 A1 WO2004059130 A1 WO 2004059130A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- rotor
- thermal expansion
- casing
- fluid machine
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2064—Housings
- F04B1/2071—Bearings for cylinder barrels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/0804—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B27/0821—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication
- F04B27/0852—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication machine housing
- F04B27/0856—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication machine housing cylinder barrel bearing means
Definitions
- both ends of the rotor are rotatably supported on the casing via the first bearing and the second bearing, so that the pressure energy of the working medium and the mechanical energy that rotates the mouth are mutually converted.
- the present invention relates to a rotary fluid machine provided with an energy conversion means for the rotor.
- Such a rotary fluid machine is known from Japanese Patent Application Laid-Open No. 2002-256680.
- This rotary fluid machine converts the pressure energy of high-temperature and high-pressure steam into mechanical energy that rotates the output shaft by means of axial piston cylinders arranged in two stages inside and outside the radial direction. Are rotatably supported on the casing by a single angular bearing.
- a pair of angular bearings that support both ends in the axial direction of the mouth of the conventional rotary fluid machine for casing not only support the radial load of the rotor but also move the rotor in the axial direction.
- An axial load is also supported for positioning. Therefore, due to the difference in the coefficient of thermal expansion between the rotor and the casing, the bearing gap between the pair of angular bearings changes to reduce durability, and the rotation of the rotor becomes unstable and smooth rotation occurs.
- the volume ratio expansion ratio
- the axial load of the rotor is supported by only one of the pair of bearings that support both ends in the axial direction of the casing in the casing. It is conceivable to absorb the difference in the coefficient of thermal expansion between the two.
- the bearing is generally made of an iron-based material having a small coefficient of thermal expansion from the viewpoint of strength and rigidity. Is made of an aluminum-based material with a large coefficient of thermal expansion from the viewpoint of weight reduction, etc.
- An axial gap i8 is generated between the casing and the bearing when hot, and the gap i3 causes the rotor to be displaced in the axial direction with respect to the casing, thereby supplying and discharging the working medium to the mouth. The sealing performance of the rotary valve may be reduced.
- the present invention has been made in view of the above circumstances, and has as its object to solve the above-mentioned problem caused by a difference in the amount of thermal expansion between a casing and a rotor of a rotary fluid machine.
- a machine in which both ends of a rotor are rotatably supported on a casing via a first bearing and a second bearing, and the pressure energy of a working medium and a port are rotated.
- a rotating fluid machine provided with an energy conversion means for converting energy and energy into the rotor, an axial load can be supported by only the first bearing among the first bearing and the second bearing.
- Rotary fluid machine is proposed.
- the axial load can be supported only by the first bearing, so that the first bearing is used.
- the axial load is applied between the second bearing and the port due to the difference in the amount of thermal expansion of the casing and the rotor in the axial direction while positioning the port in the axial direction with respect to the casing by only Can be prevented. This reduces the preload on the first and second bearings due to the difference in the amount of thermal expansion of the casing and the rotor in the axial direction, or changes in the gap between the bearings at high temperatures and especially at low temperatures.
- the rotary fluid machine is an expander, and the energy conversion means is an axial piston cylinder group.
- a rotary fluid machine characterized by the following is proposed.
- the energy conversion means of the expander for converting pressure energy into mechanical energy is constituted by a group of axial piston cylinders having a large axial length, so that the temperature difference between a low temperature and a high temperature is large. For this reason, even if the difference in the amount of thermal expansion between the casing and the rotor in the axial direction is significant, it is possible to prevent the first and second bearings from being applied with an excessively variable load. Moreover, it is possible to stabilize the dead volume between the piston and the cylinder and prevent the volume ratio (expansion ratio) of the expander from changing.
- a one-way valve for supplying and discharging the working medium is provided on the rotor, and the thermal expansion coefficient of the rotor and the heat of the first bearing are provided.
- the expansion coefficient is made substantially the same, the thermal expansion coefficient of the casing is made larger than the thermal expansion coefficient of the rotor and the thermal expansion coefficient of the first bearing, and the first bearing is supported on the casing via a bearing holder.
- a rotary fluid machine is proposed in which the thermal expansion coefficient of the holder is substantially the same as the thermal expansion coefficient of the mouth and the thermal expansion coefficient of the first bearing.
- the coefficient of thermal expansion of the rotor and the coefficient of thermal expansion of the first bearing are made substantially the same, and the coefficient of thermal expansion of the casing is calculated based on the coefficient of thermal expansion of Rhone and the coefficient of thermal expansion of the first bearing.
- the first bearing was supported on the casing via a bearing holder, and the thermal expansion coefficient of the bearing holder was made almost the same as the thermal expansion coefficient of the mouth and the first bearing. Even if there is a difference in the coefficient of thermal expansion of the first bearing, it is possible to prevent a gap from being generated between the first bearing and the bearing holder. Not only can it be prevented from lowering, but also the weight can be reduced while ensuring the desired strength and rigidity.
- the rotary fluid machine is an expander, and the energy conversion means is an axial piston cylinder group operated by a swash plate.
- a rotating fluid machine characterized by the features is proposed.
- the energy conversion means of the expander for converting pressure energy into mechanical energy is constituted by an axial piston cylinder group having a large axial length. Therefore, even if the difference in the amount of thermal expansion in the axial direction between the casing and the mouth is significant due to the large temperature difference between the low temperature and the high temperature, an excessively variable load is applied to the first and second bearings. Can be prevented. Moreover, it is possible to stabilize the dead volume between the piston and the cylinder and prevent the volume ratio (expansion ratio) of the expander from changing.
- the swash plate is supported on the casing via the swash plate holder, and the coefficient of thermal expansion of the swash plate holder is determined by the coefficient of thermal expansion of the bearing holder.
- a rotary fluid machine characterized by being substantially the same as above is proposed.
- the thermal expansion coefficient of the swash plate holder that supports the swash plate to the casing is substantially the same as the thermal expansion coefficient of the bearing holder, so that the displacement of the contact position between the pistons of the axial piston cylinder group and the swash plate can be reduced.
- This prevents the occurrence of seizure and increase in frictional resistance, and also stabilizes the positional relationship between the piston abutting on the swash plate and the cylinder provided on the rotor, thereby increasing the volume ratio (expansion ratio) of the expander. ) Can be more effectively prevented from changing.
- a rotary fluid machine in which, in addition to the fifth aspect, the swash plate holder and the bearing holder are formed of the same member.
- the swash plate holder and the bearing holder are made of the same member, not only can the volume ratio (expansion ratio) of the expander be prevented from changing, but also they can be prevented from changing.
- the number of parts can be reduced as compared with the case where it is configured by a separate member.
- the combined angular bearings 23f, 23r of the embodiment correspond to the first bearing of the present invention, and the radial bearing 24 of the embodiment corresponds to the second bearing of the present invention.
- FIGS. 1 to 13 show a first embodiment of the present invention.
- FIG. 1 is a longitudinal sectional view of an expander
- FIG. 2 is a sectional view taken along line 2--2 of FIG. 1
- FIG. Fig. 4 is an enlarged view of part 4 of Fig. 1
- Fig. 5 is an enlarged view of part 5 of Fig. 1
- Fig. 6 is an exploded perspective view of the rotor
- Fig. 7 is a sectional view taken along line 7-7 of Fig. 4
- Fig. 8 is a sectional view taken along the line 8-8 in Fig.
- Fig. 9 is an enlarged view of part 9 in Fig. 4
- Fig. 10 Is a sectional view taken along the line 10—10 in FIG. 5,
- FIG. 11 is a sectional view taken along the line 11—11 in FIG. 5
- FIG. 12 is a sectional view taken along the line 12—12 in FIG. 5, and
- FIG. It is a cross section taken along the
- FIGS. 14 and 15 show a second embodiment of the present invention.
- FIG. 13 is a diagram corresponding to FIG. 1
- FIG. 15 is a relationship between the temperature rise of the combined angular bearing and the size of the gap.
- FIGS. 16 to 19 show a third embodiment of the present invention.
- FIG. 16 is an enlarged view around the combined angular bearing of the expander
- FIG. 17 is the volume of the expander due to thermal expansion.
- Fig. 18 is a graph comparing the temperatures of the C1 and C2 zones of the expander
- Fig. 19 is a graph of the dead piston of the axial piston cylinder group against the temperature of the C2 zone. It is a graph which shows a change.
- FIG. 20 is an explanatory diagram of a gap generated between the casing and the bearing.
- the expander E of this embodiment is used, for example, in a Rankine cycle device, and converts the heat energy and pressure energy of a high-temperature high-pressure steam as a working medium into mechanical energy and outputs the mechanical energy.
- the casing 11 of the expander E includes a casing body 12 and a front cover 1 connected to a front opening of the casing body 12 with a plurality of ports 14 through a seal member 13. 5, a rear cover 18 connected to the rear opening of the casing main body 1 2 with a plurality of ports 17 via a sealing member 16, and a rear cover 18 connected to the lower opening of the casing main body 12. And an oil pan 21 connected by a plurality of ports 20.
- the rotor 22 arranged rotatably around the axis L extending in the front-rear direction at the center of the casing 11 is supported by the combined angular bearings 23 f and 23 r provided at the front of the rotor 15 at the front.
- the rear portion is supported by a radial bearing 24 provided on the casing body 12.
- a swash plate holder 28 is formed on the rear surface of the front cover 15 in a body.
- the swash plate 31 is rotatably supported by the swash plate holder 28 via an angular bearing 30.
- the axis of the swash plate 31 is inclined with respect to the axis L of the mouth 22 and the inclination angle is fixed.
- Mouth one evening 2 2 front cover with combination anguilla bearing 2 3 f, 2 3 r The output shaft 32 supported by 15 and three sleeves formed integrally with each other at the rear of the output shaft 32 through cutouts 57, 58 (see FIGS. 4 and 9) having a predetermined width.
- the supporting flanges 33, 34, 35 are connected to the rear sleeve supporting flange 35 with a plurality of ports 37 via a metal gasket 36, and the casing is formed by the radial bearing 24.
- Rotor head 38 supported by 12 and three sleeve support flanges 33, 34, and 35 are fitted from the front and a plurality of ports 39 are used to form front sleeve support flange 3.
- the three sleeve support flanges 33, 34, 35 each have five sleeve support holes 33a '", 34a ..., 35a ... formed at an angle of 72 ° around the axis L.
- the five cylinder sleeves 41 fit into these sleeve support holes 33a "', 34a-, 35a ... from behind.
- a flange 41a is formed at the rear end of each cylinder sleeve 41, and this flange 41a is formed in a step portion 35b formed in the sleeve support hole 35a of the rear sleeve support flange 35.
- the metal gasket 36 contacts the metal gasket 36 and is positioned in the axial direction (see Fig.
- a piston 42 is slidably fitted inside each cylinder sleeve 41, and a front end of the piston 42 contacts a dimple 31a formed on the swash plate 31 and a rear end of the piston 42.
- a steam expansion chamber 43 is defined between the end and the raw head 38.
- a plate-shaped bearing holder 9 2 is superimposed on the front surface of the front cover 15 via a sealing member 91 and fixed with a port 93, and is fixed to the front surface of the bearing holder 92 via a sealing member 94.
- the pump pods 95 are superimposed on each other and fixed with the ports 96.
- the combined angular bearings 23 f and 23 r are fixed between the stepped portion of the front cover 15 and the bearing holder 92 in the direction of the axis L.
- a shim with a specified thickness between the flange 3 2 d formed on the output shaft 32 supporting the combined angular bearing 23 f, 23 r and the inner of the combined angular bearing 23 f, 23 r 9 7 is clamped, and the inner race of the combined angular bearings 23 f, 23 r is tightened with the nut 98 screwed to the outer periphery of the output shaft 32.
- the output shaft 32 is positioned in the direction of the axis L with respect to the combined angular bearings 23 f, 23 r, that is, the casing 11.
- the combined angular bearings 23 f and 23 r are mounted in opposite directions, and not only support the output shaft 32 in the radial direction, but also support the output shaft 32 so as to be immovable in the axis L direction. That is, one of the combined angular bearings 2 3 f restricts the output shaft 32 from moving forward, and the other combined angular bearing 23 r restricts the output shaft 32 from moving backward. Placed in
- One of the loads is transmitted to the inner race of the combined angular bearings 23 f and 23 r through the mouth 22 and the other is the swash plate 31 and the swash plate holder of the front cover 15. It is transmitted to the outer race of the combined angular bearings 23f, 23r via 28.
- These two loads are applied to the front cover 15 sandwiched between the angular bearing 30 supporting the swash plate 31 and the combined angular bearing 23 f and 23 r supporting the mouth 22.
- the plate holder 28 is compressed, and the rigidity of the mechanism is high.
- the radial bear 24 supporting the mouth head 38 constituting the rear end of the rotor 22 is a normal pole bearing supporting only a radial load, and is a rotor head 3 8
- a gap ⁇ (see FIG. 5) is formed between the mouth head 38 and the inner race of the radial bearing 24 so that the shaft can slide with respect to the radial bearing 24 in the direction of the axis L.
- An oil passage 32 a extending along the axis L is formed inside the output shaft 32 integral with the rotor 22, and the front end of the oil passage 32 a radially branches off to the outside of the output shaft 32. It communicates with the peripheral annular groove 32b.
- Rotor 2 2 Center sleeve support flange 3 4 At the radially inner position, an oil passage closing member 45 is screwed into the inner periphery of the oil passage 32 a via a seal member 44, and extends radially outward from the oil passage 32 a in the vicinity thereof.
- a plurality of oil holes 3 2 c open in the outer peripheral surface of the output shaft 32.
- the trochoid type oil pump 49 includes an outer rotor 50 rotatably fitted in the recess 95 a and an inner rotor 5 fixed to the outer periphery of the output shaft 32 and mating with the outer rotor 50. 1 is provided.
- the internal space of the oil pan 21 communicates with the suction port 53 of the oil pump 49 via the oil pipe 52 and the oil passage 95 b of the pump body 95, and the discharge port 54 of the oil pump 49 is It communicates with the annular groove 32b of the output shaft 32 via the oil passage 95c of the popody 95.
- the piston 42 which is slidably fitted to the cylinder sleeve 41, includes an end portion 61, an intermediate portion 62, and a top portion 63.
- the end portion 61 is a member having a spherical portion 61 a that comes into contact with the dimple 31 a of the swash plate 31, and is joined to the tip of the intermediate portion 62 by welding.
- the intermediate portion 62 is a cylindrical member having a large-capacity hollow space 62a, and has a small-diameter portion 62b having a slightly reduced diameter on the outer peripheral portion near the top portion 63.
- a plurality of oil holes 6 2 c are formed so as to penetrate therethrough in the radial direction, and a plurality of spiral oil grooves 6 2 d ... are formed on the outer peripheral portion in front of the small diameter portion 6 2 b. Is formed.
- the top portion 63 facing the expansion chamber 43 is formed integrally with the intermediate portion 62, and a partition wall 63a formed on the inner surface thereof, and a metal member 6 fitted and welded to the end surface thereof.
- a heat insulation space 65 (see FIG.
- the end 6 1 and the middle 6 2 of the piston 4 2 are made of high carbon steel, and the top 6 3 is made of stainless steel.
- the end 6 1 is induction hardened, and the middle 6 2 is hardened. You.
- a high surface pressure resistance of the end portion 61 contacting the swash plate 31 with a large surface pressure, a wear resistance of the intermediate portion 62 sliding in contact with the cylinder sleeve 41 under severe lubrication conditions, and an expansion chamber 4 3 Of the top part 6 3 exposed to high temperature and high pressure Corrosion is satisfied.
- An annular groove 41b (see FIGS. 6 and 9) is formed on the outer periphery of the intermediate portion of the cylinder sleeve 41, and a plurality of oil holes 41c are formed in the annular groove 41b. Regardless of the mounting position of the cylinder sleeve 41 in the rotation direction, a hole formed in the output shaft 32 and a hole formed in the center sleeve support flange 34 of the shaft 22 are provided. The holes 3 4... (see FIGS. 4 and 6) communicate with the annular groove 41 b.
- the space 68 formed between the sleeve support flanges 33, 35 on the front and rear sides of the rotor 22 and the heat insulating cover 40 is formed by oil holes 40 a ′ ′′ formed in the heat insulating cover 40. 4 and Fig. 7) to the internal space of the casing 11.
- An annular lid member 6 9 is welded to the front side or expansion chamber 4 3... side of the rotor head 3 8 connected to the rear surface of the sleeve support flange 3 3 on the front side of the rotor 2 3 with a port 3 7...
- An annular heat-insulating space 70 (see FIG. 9) is defined on the rear or rear surface of the lid member 69.
- the rotor head 38 is positioned in the rotational direction with respect to the rear sleeve support flange 35 by the knock pin 55.
- the five cylinder sleeves 41 and the five pistons 42 constitute an axial piston cylinder group 56 of the present invention.
- roaster re-valve 71 that supplies and discharges steam to the five expansion chambers 43 of roaster 22 will be described with reference to FIG. 5 and FIGS. 10 to 13.
- the rotary valve 71 arranged along the axis L of the mouth 22 has a valve body 72, a fixed valve plate 73, and a movable valve plate 74. Is provided.
- the movable-side valve plate 74 is fixed to the rear surface of the rotor 22 by a port 76 that is screwed to the oil passage closing member 45 (see FIG. 4) while being positioned in the rotational direction by the knock pin 75. .
- the port 76 also has a function of fixing the rotor head 38 to the output shaft 32.
- the fixed valve plate 73 which comes into contact with the movable valve plate 74 via a flat driving surface 77, has one port at the center of the front of the valve body 72. 7 and fixed to the outer peripheral portion of the valve body 72 by an annular fixing ring 79 and a plurality of ports 80.
- the stepped part 79 a formed on the inner periphery of the fixing ring 79 is fitted with the outer periphery of the fixed side valve plate 73.
- the stepped portion 79b formed on the outer periphery of the fixing ring 79 is fitted into the outer periphery of the valve body 72 by the in-row fitting. Coaxiality is ensured.
- a knock pin 81 for positioning the fixed-side valve plate 73 in the rotation direction is disposed between the valve body 72 and the fixed-side valve plate 73.
- the fixed valve plate 73 and the movable valve plate 74 are made of a highly durable material such as carbon or ceramics, and the sliding surface 77 has heat resistance, lubricity and corrosion resistance. However, if a member having wear resistance is interposed or coated, the durability can be further improved.
- the stainless steel valve body 72 is a stepped cylindrical member having a large-diameter portion 72a and a small-diameter portion 72b, and the outer periphery of the large-diameter portion 72a and the small-diameter portion 72b. Are slidably fitted in the direction of the axis L along the circular cross-section support surfaces 18a, 18b of the rear cover 18 via the sealing members 82, 83, respectively.
- the pin 84 implanted on the outer peripheral surface is positioned in the rotational direction by fitting into the notch 18 c formed in the rear cover 18 in the direction of the axis L in the direction of the axis L.
- a plurality of preload springs 8 5 are supported on the rear cover 18 so as to surround the axis L. These pre-opening springs 8 5... have a step between the large-diameter portion 72 a and the small-diameter portion 72 b.
- the valve body 72 which has been pressed against the portion 72c, is urged forward to bring the sliding surfaces 77 of the fixed pulp plate 73 and the movable valve plate 74 into close contact.
- a steam supply pipe 86 connected to the rear surface of the valve body 72 includes a first steam passage P1 formed inside the valve body 72 and a second steam passage P formed in the fixed valve plate 73. It communicates with the sliding surface 7 through 2.
- a steam discharge chamber 88 sealed with a seal member 87 is formed between the casing body 12 and the rear cover 18 and the rotor 22.
- the steam discharge chamber 88 is formed in the valve body.
- the second and seventh steam passages P 6 and P 7 formed inside 72 and the fifth steam passage P 5 formed in the fixed valve plate 73 communicate with the sliding surface 77. .
- the first and second steam passages PI and P2 are connected to the mating surface of the valve body 72 and the fixed side valve plate 73.
- the both ends of the five fourth steam passages P4 communicate with the third steam passages P3 and the expansion chambers 43, respectively.
- the portion of the second steam passage P2 that opens to the sliding surface 77 is circular, whereas the portion of the fifth steam passage P5 that opens to the sliding surface 77 is a circle centered on the axis L. It is formed in an arc shape.
- the high-temperature and high-pressure steam generated by heating the water in the evaporator is integrated with the first steam passage P1 formed in the valve body 72 of the rotary valve 71 from the steam supply pipe 86, and with the valve body 72.
- the second steam passage P 2 formed in the fixed-side valve plate 73 it reaches a sliding surface 77 with the movable-side valve plate 74.
- the second steam passage P 2 opening to the sliding surface 77 is instantaneously connected to the corresponding third steam passage P 3 formed in the movable valve plate 74 rotating integrally with the rotor 22 during a predetermined intake period.
- the high-temperature and high-pressure steam is supplied from the third steam passage P3 to the expansion chamber 43 in the cylinder sleeve 41 via the fourth steam passage P4 formed in the rotor 22.
- the high-temperature and high-pressure steam expands in the expansion chamber 43, causing the cylinder sleeve 41 to move.
- the fitted piston 42 is pushed forward from the top dead center toward the bottom dead center, and the front end portion 61 presses the dimple 31 a of the swash plate 31.
- a rotational torque is applied to the rotor 22 by the reaction force received by the piston 42 from the swash plate 31.
- each time the rotor 22 rotates one-fifth high-temperature and high-pressure steam is supplied into a new expansion chamber 43 adjacent to the rotor 22, and the rotor 22 is continuously driven to rotate.
- the oil pump 49 provided on the output shaft 32 is operated, and the oil pan 21 through the oil pipe 52, the oil passage 95b of the pump pod 95, and the suction port 5
- the oil sucked through 3 is discharged from the discharge port 54, and the oil passage 95c of the pump body 95, the oil passage 32 of the output shaft 32, the annular groove 3 of the output shaft 32, and the output Formed in the intermediate portion 62 of the piston 42 through the oil hole 32c of the shaft 32, the annular groove 41b of the cylinder sleeve 41 and the oil hole 41c of the cylinder sleeve 41. It is supplied to the space between the small diameter portion 62b and the cylinder sleeve 41.
- Part of the oil retained in the small diameter portion 62b flows into a spiral oil groove 62d formed in the intermediate portion 62 of the piston 42 and slides on the cylinder sleeve 41.
- the other part of the oil lubricates the sliding surfaces of the compression rings 66, 66 and the oil rings 67 provided on the top portion 63 of the piston 42 and the cylinder sleeve 41.
- the hollow space 62a communicates with the interior of the cylinder sleeve 41 via a plurality of oil holes 62c extending through the intermediate portion 62 of the biston 42, and the interior of the cylinder sleeve 41 has multiple portions. Communicate with the annular groove 41b on the outer periphery of the cylinder sleeve 41 through a number of oil holes 41c.
- the periphery of the annular groove 4 1 b is covered by the sleeve support flange 3 4 at the center of the rotor 22, but since the oil hole 3 4 is formed in the sleeve support flange 3 4, the piston 4 2
- the oil in the hollow space 62 a is urged radially outward by centrifugal force, discharged through the oil hole 34 b of the sleeve support flange 34 to the space 68 in the heat insulating cover 40, and from there the heat insulating cover.
- 40 oil hole 4 0a ... is returned to the oil pan 21.
- the oil held in the hollow space 62 a inside the piston 42 and the oil held in the small diameter portion 62 b on the outer periphery of the piston 42 increase the volume of the expansion chamber 43. Is supplied from the small diameter portion 62 b to the top portion 63 side during the expansion stroke, and is supplied from the small diameter portion 62 b to the end portion 61 side during the compression stroke in which the volume of the expansion chamber 43 decreases. Therefore, the entire area of the piston 42 in the axial direction can be reliably lubricated.
- the oil flows inside the hollow space 6 2 a of the piston 42, so that the heat of the top part 63 exposed to high-temperature and high-pressure steam is transmitted to the low-temperature end part 61, and the temperature of the biston 42 is locally controlled. Can be avoided.
- an insulating space 65 is provided between the top part 63 of the piston 42 facing the expansion chamber 43 and the intermediate part 62.
- the heat dissipation space from the expansion chamber 43 to the piston 42 and the rotor head 38 is minimized because a heat insulating space 70 is also formed in the rotor head 38 facing the expansion chamber 43. It is possible to contribute to the improvement of the performance of the expander E by keeping it to the minimum.
- a large volume hollow space 62a is formed inside the biston 42, not only the weight of the piston 42 can be reduced, but also the heat mass of the piston 42 is reduced and the expansion chamber 43 is removed. Can be more effectively reduced.
- a metal gasket 36 is interposed between the rear sleeve support flange 35 and the low-end head 38 to seal the expansion chamber 43.Thus, a thick wall-shaped annular seal member is used. Compared to the case where the expansion chamber 43 is sealed, the dead polymer around the seal can be reduced, thereby securing a large volume ratio (expansion ratio) of the expander E, improving thermal efficiency and improving output. be able to.
- the cylinder sleeve 4 1 is formed separately from the rotor 22, the material of the cylinder sleeve 4 1 is not limited by the material of the rotor 22, but is taken into consideration, such as thermal conductivity, heat resistance, strength, and wear resistance.
- the rotary valve 71 supplies and exhausts steam to the axial piston cylinder group 56 via a flat sliding surface 77 between the fixed-side valve plate 73 and the movable-side valve plate 74. Can be effectively prevented. This is because the flat sliding surface 77 can be easily processed with high precision, so that the clearance can be easily managed as compared with the cylindrical sliding surface. In addition, since a plurality of preload springs 85 apply a preset load to the valve body 72 to generate surface pressure on the sliding surfaces 7 7 of the fixed-side valve plate 73 and the movable-side valve plate 74. Steam leakage from the moving surface 77 can be more effectively suppressed.
- the valve body 72 of the rotary valve 71 is made of stainless steel having a large coefficient of thermal expansion
- the fixed valve plate 73 fixed to the valve body 72 is made of carbon or ceramic having a small coefficient of thermal expansion. Therefore, the centering between the two may deviate due to the difference in the coefficient of thermal expansion.
- the fixing ring 79 is connected to the valve body 72 with a plurality of ports 80 in a state in which the stepped portion 79b of the outer periphery of the fixing ring 79 is fitted around the outer periphery of the valve body 72.
- the fixed side valve plate 73 is precisely centered with respect to the valve body 72 by the centering action of the in-row fitting. Performance degradation It is possible to stop.
- the contact surface between the fixed side valve plate 73 and the valve body 72 can be evenly and closely adhered by the fastening force of the ports 80 to suppress the leakage of steam from the contact surface.
- the rotary valve 71 can be attached to and detached from the casing body 12. Maintenance work such as replacement is greatly improved.
- the outlet through which the high-temperature and high-pressure steam passes The one-way valve 71 becomes hot, but the swash plate 3 1 and the output shaft 3 2 that require lubrication with oil are placed on the opposite side of the rotary valve 7 1 Therefore, it is possible to prevent the oil from being heated by the heat of the rotary valve 71, which becomes high in temperature, and to reduce the lubrication performance of the swash plate 31 and the output shaft 32.
- the oil also has a function of cooling the rotary valve 71 to prevent overheating.
- the size of the dead volume between the bottom of the cylinder sleeve 41 (that is, the lid member 69 supported by the mouth head 38) and the top of the piston 42 that is, It is necessary to adjust the volume of the working chamber 43 when the piston 42 is at the top dead center.
- the shim 97 interposed between the flange 3 2 d of the output shaft 32 and the inner bearing of the combined angular bearing 23 f, 23 r is thinned, the output shaft 32 is moved forward (right side in Fig. 1). ), The rotor head 38 also moves forward, but the piston 42 is restricted by the swash plate 31 and cannot move forward, so that the dead volume is reduced.
- a single shim 97 having a predetermined thickness is combined with the flange 32 d of the output shaft 32 and sandwiched between the angular bearings 23 f and 23 r to support the swash plate 31.
- One nut 9 is composed of a front cover 15 incorporating a combination angular bearing 23 f, 23 r supporting the Yura bearing 30 and a rotor 22 and a rotor 22 incorporating a piston 42. Since the dead film can be adjusted simply by tightening at 8, the adjustment work can be performed more easily than when adjusting the thickness of the two shims before and after the conventional shim.
- the rear head 3 8 at the rear end also moves back and forth.
- the rotor 22 composed of the output shaft 32, the three sleeve supporting flanges 33, 34, 35, the rotor head 38 and the heat insulating cover 40 is made of an iron-based material having a relatively small coefficient of thermal expansion.
- the casing 11 that combines the rotor 22 and supports it through the angular bearings 23 f and 23 r and the radial bearing 24 is an aluminum-based material having a relatively large coefficient of thermal expansion. Therefore, there is a difference in the amount of thermal expansion between the low temperature and high temperature of the expander E, particularly in the direction along the axis L.
- the casing 11 and the rotor 22 are positioned in the direction of the axis L via the combined angular bearings 23 f and 23 r, the difference in the amount of thermal expansion between the two is determined by the inner diameter of the radial bearing 24.
- the combined angular bearing 23 f, 23 r, radial bearing 24 and rotor An excessive load in the direction of the axis L is prevented from acting on 22. This not only improves the durability of the combined angular bearings 2 3 f, 2 3 1-and the radial bearings 24, but also enables stable rotation of the rotor 22 by supporting it stably. In addition, it is possible to prevent a change in dead volume between the top of the cylinder sleeve 41 and the top of the piston 42 due to a temperature change.
- the casing 11 tries to extend in the direction of the axis L with respect to the rotor 22. Therefore, the piston 42 is pulled out from the inside of the cylinder sleeve 41 and the dead volume increases.
- An increase in the initial volume of the high-temperature and high-pressure steam in the normal operation state after the completion of the warm-up that is, a decrease in the thermal efficiency due to a decrease in the volume ratio (expansion ratio) of the expander E occurs.
- the mouth 22 is supported in the floating state in the direction of the axis L with respect to the casing 11, so that the combined angular bearings 23 f, 23 1-and the radial bearing 24 are supported.
- the above-described effect is effectively exhibited because the temperature difference between high temperature and low temperature is large.
- the temperature difference between high temperature and low temperature becomes large.
- the radial bearing 24 arranged closer to the one-way valve 71 is large. Since the opening head 38 can slide in the direction of the axis L, the difference between the thermal expansion coefficients of the casing 11 and the rotor 22 can be absorbed without any trouble.
- the fixed side valve plate 73 of the rotary valve 71 and the movable side valve plate The fixed side valve plate 7 3 supported by the casing 11 1 of the ports 7 4 is connected to the movable side valve plate 7 4 supported by the rotor 22 2. Even if the positional relationship of casing 11 and mouth 22 in the direction of axis L fluctuates due to temperature changes, the fixed side valve plate 73 and the movable side valve plate There is no possibility that the sealing performance of the sliding surface 74 of 74 is impaired.
- the combined angular bearings 23 f, 23 r are directly supported by the casing 11, but in the second embodiment, the combined angular bearings 23 f, 23 r are attached to the casing 11. It is supported via a ring holder 99. That is, a substantially cylindrical bearing holder 99 fitted to the inner periphery of the front cover 15 is fixed together with a plate-shaped set plate 92 superposed on the front surface thereof by a port 93, and furthermore, The pump body 95 is superimposed on the front surface of the cover 15 via a seal member 94 and fixed with the ports 96. Therefore, the combined angular bearings 23 f and 23 r are fixed between the stepped portion of the bearing holder 99 and the set plate 92 in the direction of the axis L.
- the bearing holder 99, the set plate 92, and the combined angular bearings 23f, 23r are made of an iron-based material having a relatively small coefficient of thermal expansion, like the rotor 22.
- the combined angular bearings 23 f and 23 r made of an iron-based material having a relatively small coefficient of thermal expansion are combined with an aluminum-based material having a relatively large coefficient of thermal expansion.
- the angular bearings 23 f, 23 r are combined via a bearing holder 99 made of an iron-based material fixed to the casing 11 1 to form the casing 11 1.
- This gap) 3 moves the rotor 22 in the direction of the axis L. As a result, it is possible to prevent the sealing performance of the sliding surface 77 of the rotary valve from being reduced.
- the swash plate holder 28 is formed integrally with the front cover 15 in the second embodiment, the swash plate holder 28 is separated from the front cover 15 in the third embodiment shown in FIG. It is formed integrally with the bearing holder 99.
- the integrated bearing holder 99 and the swash plate holder 28 are fixed to the front cover 15 by means of the ports 100, together with the set plate 92 fixed to them by the ports 93. .
- the swash plate holder 28 and the bearing holder 99 are made of an iron-based material having a small coefficient of thermal expansion, similarly to the bearing holder 99 of the second embodiment.
- the thermal expansion coefficient of the swash plate holder 28 is smaller than the thermal expansion coefficient of the front cover 15 made of an aluminum-based material, Minimize the displacement due to thermal expansion of 8 and prevent the displacement of the contact position between the end 6 1 of the piston 4 2 and the dimple 3 1 a of the swash plate 3 1 to generate seizure and increase frictional resistance Can be prevented. Moreover, the positional relationship in the direction of the axis L between the piston 42 contacting the swash plate 31 and the cylinder sleeve 41 provided on the rotor 22 is stabilized, and the volume ratio (expansion ratio) of the expander E changes. Can be more effectively prevented.
- zone A 1 is defined as zone A 1. 2 and zone C 1 corresponding to the output shaft 32.
- zone B2 is composed of a zone B2 corresponding to the piston 42 and a zone C2 corresponding to the swash plate holder 28. .
- the length of the zone A 1 in the direction of the axis L is set slightly longer than the length of the zone A 2 in the direction of the axis L, and the difference between the lengths is at the top of the cylinder sleeve 41 and at the top dead center. The distance from the top of the piston 42 becomes the dead volume. Since both the mouth 22 and the piston 42 are made of an iron-based material, the difference in the length of the zone B 1 and the zone B 2 in the direction of the axis L between when the expander E is cold and when it is hot is used. Hardly changes.
- zone C2 has no special cooling function
- the output shaft 32 in zone C1 is cooled by the lubricating oil flowing inside, so As a result, the temperature of the zone C 1 becomes low (see FIG. 18).
- the output shaft 32 made of an iron-based material has a small coefficient of thermal expansion
- the synergistic effect of the expansion device E The thermal expansion of zone C2 during the hot period is much larger than that of zone C1.
- zone A2 becomes larger than the thermal expansion of zone A1
- the dead polym between the top of cylinder sleeve 41 and the top of piston 42 decreases, and the volume ratio of expander E decreases. It deviates from the design value and causes a decrease in thermal efficiency.
- the swash plate holder 28 is made of an iron-based material having a small coefficient of thermal expansion, the difference in the thermal elongation between the zones C1 and C2 is reduced, as shown in FIG.
- the reduction of the dead volume between the top of the cylinder sleeve 41 and the top of the piston 42 at the top dead center is reduced, and the volume ratio of the expander E deviates from the design value. Can be minimized to prevent a decrease in thermal efficiency.
- bearing holder 99 and the swash plate holder 28 are made of the same material, the number of parts can be reduced.
- the expander E of the Rankine cycle device is illustrated, but the rotary fluid machine of the present invention is applicable to any use other than the expander E.
- the casing 11 is made of an aluminum material
- the rotor 22, the output shaft 32, the bearing holder 99 and the swash plate holder 28 are made of an iron material. Any material other than the above can be selected as long as it satisfies the magnitude relationship of the coefficient of thermal expansion specified in Item 3.
- the bearing holder 99 and the swash plate holder 28 are formed of the same member, but they can be formed of different members.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/540,158 US20060153698A1 (en) | 2002-12-25 | 2003-12-22 | Rotary fluid machine |
EP03780999A EP1577489A1 (en) | 2002-12-25 | 2003-12-22 | Rotary fluid machine |
AU2003289491A AU2003289491A1 (en) | 2002-12-25 | 2003-12-22 | Rotary fluid machine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-374329 | 2002-12-25 | ||
JP2002374329A JP2004204766A (ja) | 2002-12-25 | 2002-12-25 | 回転流体機械 |
JP2003379929A JP2005140074A (ja) | 2003-11-10 | 2003-11-10 | 回転流体機械 |
JP2003-379929 | 2003-11-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004059130A1 true WO2004059130A1 (ja) | 2004-07-15 |
Family
ID=32684232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/016481 WO2004059130A1 (ja) | 2002-12-25 | 2003-12-22 | 回転流体機械 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060153698A1 (ja) |
EP (1) | EP1577489A1 (ja) |
AU (1) | AU2003289491A1 (ja) |
WO (1) | WO2004059130A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20080053A0 (fi) * | 2007-12-12 | 2008-01-22 | Wallac Oy | Laite ja menetelmä optisen komponentin paikan sovittamiseksi |
JP6133014B2 (ja) * | 2012-02-28 | 2017-05-24 | ナブテスコ株式会社 | 油圧ポンプ |
EP2971720A4 (en) * | 2013-03-12 | 2016-11-02 | Dana Ltd | ADVANCED HEAT RECOVERY SYSTEM |
US10215186B1 (en) | 2016-09-02 | 2019-02-26 | Rotary Machine Providing Thermal Expansion Compenstion, And Method For Fabrication Thereof | Rotary machine providing thermal expansion compensation, and method for fabrication thereof |
US10184473B1 (en) | 2016-09-02 | 2019-01-22 | Mainstream Engineering Corporation | Non-contracting bidirectional seal for gaseous rotary machines |
US10309398B1 (en) | 2016-09-02 | 2019-06-04 | Mainstream Engineering Corporation | Passage arrangement for cooling, lubricating and reducing the size of rotary machines |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0464962U (ja) * | 1990-10-16 | 1992-06-04 | ||
JP2000262004A (ja) * | 1999-03-05 | 2000-09-22 | Nec Corp | スピンドルモータ |
WO2002070865A1 (fr) * | 2001-03-06 | 2002-09-12 | Honda Giken Kogyo Kabushiki Kaisha | Machine hydraulique rotative |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3228303A (en) * | 1963-12-04 | 1966-01-11 | Weatherhead Co | Hydraulic motor |
US3311431A (en) * | 1964-08-07 | 1967-03-28 | Irving W Hilliard | Temperature compensating bearing assembly |
JPS5011086B1 (ja) * | 1967-06-14 | 1975-04-26 | ||
US4211148A (en) * | 1978-09-26 | 1980-07-08 | The United States Of America As Represented By The Secretary Of The Navy | Hot gas motor |
US4426914A (en) * | 1981-08-24 | 1984-01-24 | The Kline Manufacturing Company | Axial piston pump |
JPH06221264A (ja) * | 1993-01-25 | 1994-08-09 | Toyota Autom Loom Works Ltd | 往復動型圧縮機 |
US6293704B1 (en) * | 2000-03-21 | 2001-09-25 | The Timken Company | Shaft mounting with enhanced stability |
-
2003
- 2003-12-22 US US10/540,158 patent/US20060153698A1/en not_active Abandoned
- 2003-12-22 WO PCT/JP2003/016481 patent/WO2004059130A1/ja not_active Application Discontinuation
- 2003-12-22 AU AU2003289491A patent/AU2003289491A1/en not_active Abandoned
- 2003-12-22 EP EP03780999A patent/EP1577489A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0464962U (ja) * | 1990-10-16 | 1992-06-04 | ||
JP2000262004A (ja) * | 1999-03-05 | 2000-09-22 | Nec Corp | スピンドルモータ |
WO2002070865A1 (fr) * | 2001-03-06 | 2002-09-12 | Honda Giken Kogyo Kabushiki Kaisha | Machine hydraulique rotative |
Also Published As
Publication number | Publication date |
---|---|
US20060153698A1 (en) | 2006-07-13 |
EP1577489A1 (en) | 2005-09-21 |
AU2003289491A1 (en) | 2004-07-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7406911B2 (en) | Expander | |
WO2004059130A1 (ja) | 回転流体機械 | |
JP3923331B2 (ja) | 膨張機 | |
US7367783B2 (en) | Rotating fluid machine | |
US20040216602A1 (en) | Rotating fluid machine | |
JP2002256805A (ja) | 回転式流体機械 | |
US20050254965A1 (en) | Expansion machine | |
US20050089410A1 (en) | Rotating fluid machine | |
JP2005140074A (ja) | 回転流体機械 | |
US20040216601A1 (en) | Rotating fluid machine | |
US20040200350A1 (en) | Rotating fluid machine | |
JP2004204766A (ja) | 回転流体機械 | |
JP2003214101A (ja) | 回転式流体機械 | |
US20050158181A1 (en) | Expansion engine | |
US20050160729A1 (en) | Rotating fluid machine | |
US20050132703A1 (en) | Rotating fluid machine | |
JP2004239066A (ja) | 回転流体機械 | |
JP2004270524A (ja) | 回転流体機械 | |
US20050180861A1 (en) | Rotating fluid machine | |
JP2003239703A (ja) | 回転式流体機械 | |
JP2004218521A (ja) | 回転流体機械 | |
JP2005171954A (ja) | 回転流体機械 | |
JP2002256804A (ja) | 回転式流体機械 | |
JP2004270523A (ja) | 回転流体機械 | |
US20050169771A1 (en) | Rotating fluid machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003780999 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003780999 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2006153698 Country of ref document: US Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10540158 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 10540158 Country of ref document: US |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2003780999 Country of ref document: EP |