Positive displacement rotary machine

Abstract

A rotary machine for fluid treatment comprises a static housing (2) having first and second ports (H, L) for allowing fluid to flow out and into the rotary machine. The rotary machine comprises a rotor body (4, 4 ') attached to a main shaft (3) arranged within a static housing (2), the rotor body (4, 4') having a central axis (R) arranged at an offset distance (e) from a central axis (M) of the main shaft (3), the rotary machine further comprises a sealing blade (5, 5 ') having a blade tip (6, 6') and a blade movement system (8, 8 ') operatively connected between the rotor body (4, 4') and the sealing blade (5, 5 ') for keeping a blade tip sealing face (6a, 6c) of the blade tip (6, 6') sealingly close to the rotor body outer face (4a, 4b).

Description

Technical Field

[0001] The present invention relates to a positive displacement rotary machine. Preferably, the positive displacement rotary machine is intended for use as a compressor and / or expander for gases or gas / liquid mixtures, or as a pump and / or hydraulic motor for liquids. Background Art

[0002] Rotary machines with an eccentric rotor rotating around the central axis of a cylindrical housing are well known and widely used, for example, as compressors in heating and cooling processes. In a rotary machine of this type, a closed working chamber is formed between three main components: a static housing having a substantially cylindrical inner bore; a rotor, also cylindrical and having a diameter smaller than the housing bore, eccentrically fixed to a shaft rotatable around the center of the housing bore so that the rotor outer wall is tangential to the housing inner wall; and a movable member or vane sealed between the housing and the rotor. Each component must be sealed towards the two other components to form a closed working chamber between them, and as the rotor rotates, the working chamber changes volume to compress or expand the processed working fluid.

[0003] Such machines are generally considered reliable and robust devices, but rely primarily on direct contact between the rotor and the sealing vanes to provide adequate sealing of the working chamber. This contact causes friction and sets limits on the size and volume capacity of the machine, or requires the introduction of lubricants directly into the working chamber or into the working fluid.

[0004] The advantage of the present invention is (at least) that it provides a method to keep the parts forming the working chamber in sealed proximity throughout the entire working cycle without contact between them. The parts that are sealed close are understood to be parts that are light or contactless but still do not form a gap between them or form a gap small enough to prevent excessive leakage of the fluid in the gap. Therefore, there is no friction between these parts and there is no need to introduce lubricant into the working chamber. The three parts that form the working chamber are a static housing, a rotating rotor, and a swinging blade. The rotor and the swinging blade are all fixed to the shaft, and a connecting rod connects these shafts to control the swinging motion of the blade. The geometric relationship between the parts ensures that the curved surfaces of the stator, rotor and blade will be tangent to each other and seal the working chamber.

[0005] A further advantage of the invention is that the two mentioned shafts can be easily sealed around by conventional shaft seals, thus effectively isolating all bearing functions from the working chamber, thereby allowing lubrication of the bearings while keeping the working chamber free of lubricant.

[0006] A further advantage of the present invention is that it provides a method of contactless and adjustable support for the oscillating motion of the blade relative to the housing, which increases control over the blade position and reduces forces on the connecting rod and connecting rod bearings.

[0007] Further and other objects of the present invention may become apparent from the following description and accompanying drawings. Summary of the invention

[0008] The present invention relates to a rotary machine for fluid processing, the rotary machine comprising a static housing having a first port and a second port for allowing fluid to flow out of and into the rotary machine;

[0009] A rotor body is attached to the main shaft arranged in the static housing, the rotor body having a central axis arranged to be offset a certain distance from the central axis of the main shaft.

[0010] The rotary machine also includes a sealing vane having a vane tip, and a vane movement system operatively connected between the rotor body and the sealing vane for maintaining a vane tip sealing surface of the vane tip sealingly proximate to the outside of the rotor body.

[0011] The present invention relates to a rotary machine for fluid processing, which comprises: a static housing having a main cylindrical inner wall; a rotor body eccentrically fixed to a main shaft and concentrically rotatably mounted to the inner wall of the housing; and a swing sealing blade fixed to a blade shaft parallel to the main shaft and spaced apart from the main shaft. The rotor body has one or more sealing portions sealed against the blade and the inner wall of the housing. The blade has a portion sealed against the rotor and a portion sealed against the housing. Thus, a closed chamber is formed between the housing, the rotor body and the blade, and the volume of the chamber changes as the rotor rotates. A connecting rod connects the swinging blade to a crank on the main shaft so that the blade tip is always sealed close to the rotor body sealing portion.

[0012] Preferred embodiments are set out in the attached dependent claims.

[0013] A compressor includes a positive displacement rotary machine.

[0014] Preferably, the second port is an outlet port having a valve adapted to open when the pressure inside the rotating machine exceeds the pressure downstream of the outlet valve.

[0015] An expander includes a positive displacement rotary machine.

[0016] Preferably, the second port is an inlet port having a control valve adapted to open at a given position, such as by mechanical control of a rotor position setting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 shows a cross-sectional view of a first embodiment of a rotary machine as seen from the end;

[0018] Figure 2 Shown from the side Figure 1 A cross-sectional view of a rotating machine;

[0019] Figure 3 Shown from the outside Figure 1 Rotating machines;

[0020] Figure 4 A second embodiment of the rotor body is shown;

[0021] Figure 5 shows a cross-sectional view of an alternative embodiment of a rotating machine viewed from the end;

[0022] Figure 6 A cross-sectional view of an alternative embodiment of a rotary machine is shown as seen from the side;

[0023] Figure 7 An alternative embodiment of a rotary machine is shown as seen from the outside;

[0024] Figure 8 A detailed view showing an alternative embodiment of an integrated vane support mechanism for the sealing vanes. Specific embodiments

[0025] For the sake of simplicity, identical features are denoted by the same reference numerals in different figures.

[0026] Figure 1 A cross section of a positive displacement rotary machine 1 according to the invention is shown.

[0027] The rotary machine 1 comprises an outer housing 2 having a cylindrical inner wall 2a. The outer housing 2 has a first port L and a second port H. The first port L and the second port H are adapted to allow a working fluid F to flow into and out of the housing 2. The direction of the fluid F through each port L, H depends on the use of the rotary machine 1. Reference numeral 18 refers to a valve arrangement which is arranged in association with the port H to allow a working fluid to flow into or out of the housing 2.

[0028] The rotating machine 1 further comprises a main shaft 3 rotatably supported in the outer housing 2. The main shaft 3 is concentrically arranged in the housing bore 1a. The housing bore 1a is defined as a hole in the outer housing 2. The outer boundary of the housing bore 1a is identical to the cylindrical inner wall 2a. The central axis M ( Figure 2 ) thus coincides with the central axis M of the housing hole 1a. The distance between the central axis M and the cylindrical inner wall 2a is h.

[0029] The rotor body 4 is further attached to the main shaft 3 .

[0030] In a first embodiment of the present invention, the rotor body outer surface 4a is mainly cylindrical, and its central axis R is parallel to the main shaft center line M and offset relative to the main shaft center line. The radius r of the rotor body outer surface 4a and the rotor offset e are determined so that the part of the rotor body outer surface 4a farthest from the main shaft center axis M is always close to the housing inner wall 2a. This will produce a seal between the housing inner wall 2a and the rotor body outer surface 4a, and the rotor body 4 does not have to contact the housing 2. This further leads to the avoidance of any friction between the rotor body 4 and the housing 2. The rotary machine 1 also includes a sealing blade 5. The sealing blade 5 is pivotably supported in the housing 2 by a blade shaft 7. The blade shaft 7 has a pivot axis V( Figure 2 ), the pivot axis V is parallel to the central axis M of the main shaft 3 and is spaced apart from the central axis M.

[0031] The sealing blade 5 comprises a blade tip 6 which is arranged at the free end of the sealing blade 5, i.e. at the opposite end of the pivot axis V. The blade tip 6 may have a cylindrical or semi-cylindrical outer surface 6a. The sealing blade 5 is further arranged in the static housing 2 such that the blade tip outer surface 6a (see Figure 8 ) always close to the outer surface 4a of the rotor body, thus forming a seal between the rotor body 4 and the blade 5. Figure 1 Further shown in .

[0032] The sealing vane 5 also has a sealing surface 5a. The sealing surface 5a has a cylindrical or semi-cylindrical shape, with its central axis being co-linear with the central axis V of the vane pivot shaft. The sealing surface 5a effectively seals against the portion 2b of the housing 2 between the first port L and the second port H.

[0033] Therefore, a closed working chamber W is formed between the rotor body 4, the housing inner wall 2a and the blades 5. The volume of the working chamber W will increase or decrease (depending on the rotation direction) as the rotor body 3 rotates, resulting in compression or expansion of the working fluid F.

[0034] exist Figure 4 Another embodiment of the present invention of a rotating machine 50 in FIG. 5 shows a different configuration of the rotor body 4'. In this embodiment, the rotor body 4' does not have a cylindrical outer surface 4a. Instead, the rotor body has a lens-shaped cross-section. The shape includes two different cylindrical segments. The shape includes a first segment having an outer surface 4b, the center axis R of which is offset from the center axis M by a distance "rotor offset" e to form a seal against the sealing blade tip 6a. The rotor body also includes a second segment having an outer surface 4c that is concentric and co-radial with the housing inner wall 2a to seal against the housing inner wall 2a.

[0035] The rotary machine 1 may also include a blade movement system 8. Figure 2 and Figure 3 The vane movement system 8 comprises one or more connecting rods 9. Each connecting rod 9 connects the pivoting sealing vane 5 to the crank 10 via a pivot arm 11. One end of the pivot arm 11 is rigidly mounted to the vane 5.

[0036] like Figure 2 As shown, the pivot arm 11 and the connecting rod 9 are rotatably connected to each other via a latch 12 at their respective ends.

[0037] The connecting rod 9 is further rotationally connected to a crank 10 at the opposite end.

[0038] like Figure 2 and Figure 3 As shown, the crank 10 may be an integral part of the main shaft 3. However, the center axis of the crank 10 is arranged offset from the center axis M of the main shaft 3. When the main shaft 3 rotates, this results in an offset rotation of the crank 10 and a consequent linear motion of the connecting rod 9. The crank offset distance is the same distance e as the distance between the center axis of the main shaft M and the center axis of the rotor body R.

[0039] The offset of the crank 10 is equal to the offset of the rotor body 4. This means that the center axis of the rotor body R and the center axis of the crank 10 coincide.

[0040] Figures 1 to 4 An embodiment of the blade movement system 8 is shown in which the latch 12 connecting the link 9 to the pivot arm 11 is concentric with the semi-cylindrical shape of the blade tip sealing surface 6a. The length P of the link 9 is also equal to the sum of the length of the rotor body radius r and the blade tip radius v ( Figure 1 ). The length P is defined as the length between the center axes. Therefore, the connecting rod 9 will guide the pivoting sealing blade 5 so that the blade tip 6a is always tangent to the outer surface 4a of the rotor body, thereby generating a sealing line S ( Figure 8 ) without requiring contact between the components (i.e. the rotor body 4 and the sealing vane tip 6a). This results in no friction occurring between the vane tip 6a and the rotor body outer surface 4a.

[0041] More precisely, the semi-cylindrical or circular surface of the blade tip 6a is always tangential to the outer surface 4a of the cylindrical rotor body.

[0042] Figures 5 to 7 Another embodiment of a sealing vane 5' and a vane movement system 8' according to the invention is shown.

[0043] exist Figures 5 to 7In the embodiment of the rotary machine 60 in FIG. 1 , the blade tip 6 ′ is rigidly connected to the connecting rod 9. The blade tip 6 ′ has a first semicircular face 6 b that seals against the blade 5 ′ and a second semicircular face 6 c that seals against the outer face 4 a of the rotor body. Figure 5 As shown, the first semicircular face 6b is adapted to match the blade semicircular face 5b of the blade 5'. Similarly, the second semicircular face 6c is adapted to match the circular shape of the rotor body outer face 4a.

[0044] The blade tip 6' is connected to the blade 5' via a blade tip bearing 17 ( Figure 6 ), thereby ensuring that the blade 5' will follow the movement of the blade tip 6'. This embodiment has the advantage that the blade tip second sealing surface 6c can be concentric and co-radial with the rotor body outer face 4a. This provides a better seal between the second sealing surface 6' and the rotor outer face 4a than two surfaces with different radii that seal only on a tangent.

[0045] The following description is equally relevant to all embodiments of the invention.

[0046] Since the blades 5, 5' and the rotor body 4 are the only moving parts in the working chamber W, this means that no contact is required between any moving parts and the working chamber W. Therefore, lubricants are also not required herein and contamination of the working fluid can be avoided.

[0047] All relative movements between components in the working chamber W are controlled by the main shaft 3 and the blade movement system 8, 8'. All necessary bearing functions are controlled by multiple bearings - the main rotor bearing 13, the crank bearing 14, the blade shaft bearing 16 and the connecting rod bearing 15 (for Figures 1 to 4 embodiment shown) or blade tip bearing 17 (for Figures 5 to 7 All these bearings can then be located away from the working chamber W. Since the movement of the rotor body 4 and the blades 5 is a movement that can be transmitted by the cylindrical shafts 3, 7, 6', 10, 12, the bearings 13, 14, 15, 16, 17 can be oil-lubricated and separated from the working chamber W by simple shaft seals. This is known per se.

[0048] The function of the blade moving system 8 , 8 ′ is therefore to couple the connection between the rotor body 4 and the blade tip 6 , 6 ′ without requiring a connection within the working chamber W. The connecting rod 9 is given an oscillating movement by means of a crank 10 .

[0049] for Figures 1 to 4 In the embodiment shown in , this provides a swinging movement of the pivot arm 11 coupled to the connecting rod 9. Since the pivot arm 11 is fixedly attached to the blade 5, the blade 5 will move accordingly.

[0050] for Figures 5 to 7In the embodiment shown in , the blade tip 6' is fixed to the connecting rod 9 and will move with it. The blade tip 6' is rotatably connected to the blade 5, so that the oscillating movement of the connecting rod 9 and the blade tip 6' also provides the oscillating movement of the blade 5. Figure 7 In FIG. 2 , a through hole is shown which is formed as a slot 26 in the static housing wall 2. The slot 26 defines a path in which the part of the connecting rod 9 connected to the blade 5 can move.

[0051] In all embodiments, the elements of the blade moving device 8, 8' are arranged such that the rotor body 4, 4' and the blades 5, 5' are moved by the blade moving device 8, 8' and not by any contact between the rotor body 4, 4' and the blades 5, 5'.

[0052] The rotary machine 1 may also include one or more blade support mechanisms 20 located at the interface between the housing 2 and the blades 5. Figure 8 Shown in detail.

[0053] Figure 8 A blade support mechanism 20 is shown. The blade 5 may have a sealing protrusion 21 extending from the blade sealing surface 5a. The protrusion 21 may, for example, be positioned at the midpoint of the sealing surface 5a.

[0054] The blade support mechanism 20 comprises a cavity K in the housing 2, in which the projection 21 can move freely within the pivot range of the sealing blade 5. The pivot range is the space within the cavity K between the end positions O and N, such as Figure 8 shown.

[0055] The protrusion 21 is adapted to effectively seal against the chamber wall 2b, thereby forming two separate closed volumes A and B which can be connected to the machine working chamber and thus contain the working fluid F.

[0056] The oscillating motion of the blade 5 causes a large dynamic force Fd on the blade 5 and the blade moving system 8. Depending on the direction of the stroke, the motion will also result in a compression of volume A and an expansion of volume B, or vice versa. This creates a differential pressure between volume A and volume B, which again creates a force Fp on the protrusion 21. This force will counteract the dynamic force Fd and thus greatly unload the blade 5 and the blade moving system 8.

[0057] The blade support mechanism 20 may also include one or more fluid supply channels 22 that connect each of the two volumes A, B to the compressor port L or H ( Figure 1 , Figure 4 , Figure 5) for supplying fluid into volumes A, B. There may also be a check valve 23 in the fluid supply channel 22 to prevent backflow and flow between volumes A, B. The blade support mechanism 20 may further have a fluid return line 24 connecting each volume to the compressor inlet port and / or outlet port, a fixed or adjustable throttling device 25 (such as a valve) in the fluid return line 24, so as to set the maximum obtainable pressure in each volume.

[0058] See also Figure 8 When the machine is running, the blade 5 will swing so that the protrusion 21 moves between its upper position O and lower position N. When the protrusion 21 is in its upper position O, the dynamic force Fd will be at its maximum value in the direction away from the rotor body 4, and when the protrusion is in its lower position b, the dynamic force Fd is at its maximum value in the direction towards the rotor body 4.

[0059] The blade support mechanism 20 uses the movement of the blade 5 to fill and compress the working fluid in the two volumes A, B on each side of the blade sealing surface protrusion 21 .

[0060] When the protrusion 21 is in its upper position O, volume A will be fully compressed, while volume B will not be compressed or will expand, depending on the setting of the throttling device 25. The pressure difference between the two volumes A, B acts on the protrusion 21, exerting a pressure Fp on the blade 5 towards the rotor body 4 (i.e., opposite to the dynamic force Fd).

[0061] When the blade 5 with the protrusion 21 moves from its upper position O towards its lower position N, the dynamic force Fd gradually decreases before changing direction and reaches its maximum value in the direction towards the rotor body 4 when the protrusion 21 reaches its lower position N. At the same time, volume A expands and volume B is compressed.

[0062] By selecting a suitable width of the protrusion 21 and adjusting the maximum pressure in the two volumes A, B using, for example, a throttle device 25, the force Fp of the blade support mechanism 20 can counteract the dynamic forces, significantly reducing the total force on the blade 5.

[0063] This is beneficial because it prevents undesirable clearance between the blade tip sealing surface 6a and the outer face 4a of the rotor body from being created by the dynamic force FD which forces the blade 5 away from the rotor body 4 as the blade 5 moves towards its upper position O. In this moving part, the working fluid F in the working chamber W is at or close to its maximum pressure, so minimizing the clearance to avoid volume loss is very important.

[0064] Furthermore, the support mechanism 20 reduces the forces on the connecting rod bearing 15 and the blade tip bearing 17. This results in the use of smaller, lighter bearings and other moving parts, which again means reducing, for example, size, complexity, cost and vibration to the environment.

[0065] Even though the blade support mechanism 20 is shown as having Figure 1 The blade support mechanism is also applicable to Figure 5 The blade embodiment shown in FIG.

[0066] The positive displacement rotary machine 1 may be suitable for different purposes, for example as a compressor of gas and / or expander for gas / liquid mixtures.

[0067] When operating as a driven machine (e.g., a compressor or pump), a rotational motion is applied to the main shaft 3 by, for example, an electric motor to rotate the rotor 4. When operating as a driver (e.g., an expander), the pressure in the working chamber W drives the rotor 4, and the rotational motion is transmitted via the main shaft 3 to a consumer, such as a generator.

[0068] The working fluid enters the machine through one of the first ports L or the second ports H, depending on whether the rotary machine 1 is operating as a compressor or as an expander.

[0069] In the compressor, the working fluid enters the working chamber W through port L. Figure 1 , the rotor body 4 rotates clockwise. Once the sealing line or portion between the rotor body 4 and the housing 2 has moved through the port L, a closed working chamber W is formed between the rotor body 4, the static housing inner wall 2a and the sealing vanes 5. The volume of the working chamber W will decrease as the rotor body 4 continues its rotation, and the pressure of the working fluid F trapped in the working chamber W will increase. Once the required discharge pressure is reached, the working fluid F will leave through the second port H.

[0070] A valve arrangement 18 or similar in the high pressure port H is necessary to control the machine volume ratio. When designed as a compressor, this can be a standard compressor valve, or other type of reed valve or check valve that will open once the pressure in the working chamber W reaches or slightly exceeds the pressure downstream of the valve 18. These types of valves do not require additional control mechanisms.

[0071] When operating as an expander, the valve 18 may need to be controlled to open at a given position, for example by a mechanical control (such as a camshaft that sets the valve position based on the rotor body 4 position).

[0072] Even though the figures show different embodiments, it should be noted that the embodiment of the rotor body 4, 4' can be used in any of the embodiments 1-3 or 5-7.

[0073] For example, Figure 5 The rotor body 4' can be connected with Figure 5 ' blades.

[0074] The blade support mechanism may be used in all embodiments of the present invention.

[0075] chart

[0076] 1- Rotating Machine, First Embodiment

[0077] 2-Static shell

[0078] 2a-Inner wall of shell

[0079] 2b-shell cavity sealing surface

[0080] 3-Spindle

[0081] 4- Rotor body, first embodiment

[0082] 4'-Rotor body, second embodiment

[0083] 4a-Rotor sealing surface

[0084] 4b-Rotor body-blade sealing surface

[0085] 4c- rotor body - housing sealing surface

[0086] 5-Sealing blade

[0087] 5a-Blade-housing sealing surface

[0088] 5b - Blade-to-blade tip sealing surface

[0089] 6- Blade tip, first embodiment

[0090] 6'- Blade tip, second embodiment

[0091] 6a- Blade tip - rotor sealing surface

[0092] 6b-blade tip-blade sealing surface 6c-blade tip-rotor sealing surface, fixed blade tip 7-blade shaft

[0093] 8-Blade Movement System, First Embodiment

[0094] 8'-Blade Movement System, Second Embodiment

[0095] 9-Connecting rod

[0096] 10-Crank

[0097] 11- Pivot Arm

[0098] 12-Latch

[0099] 13-Main rotor bearing

[0100] 14-Crank bearing

[0101] 15-Connecting rod bearing

[0102] 16-Blade shaft bearing

[0103] 17-Blade tip bearing

[0104] 18-Valve

[0105] 20-Blade support mechanism

[0106] 21-Sealing protrusion

[0107] 22-Fluid supply channel

[0108] 23-Restrictor, Check Valve

[0109] 24-Fluid return line

[0110] 25-Throttling device

[0111] 26-slot

[0112] 50 - Rotating Machine, Second Embodiment

[0113] 60 - Rotating Machine, Third Embodiment

[0114] K-Blade Support Mechanism Chamber

[0115] A-First closed volume

[0116] B-Second closed volume

[0117] O- blade protrusion upper position

[0118] N-Lower position of blade protrusion

[0119] S-Seal Line

[0120] M-center axis spindle and housing hole

[0121] R-Center axis rotor body and crank

[0122] C-Center axis pin and blade tip

[0123] V-center axis blade shaft

[0124] W-Studio

[0125] F-Working fluid

[0126] L - First Port - Inlet Fluid Port / Outlet Fluid Port

[0127] H - Second Port - Outlet Fluid Port / Inlet Fluid Port

[0128] P- length of connecting rod

[0129] Fd - dynamic force on the blade

[0130] Fp - force on the blade caused by the pressure difference across the sealing protrusion 21

[0131] d-diameter of the rotor body

[0132] e-rotor offset distance

[0133] c-shell inner hole radius

[0134] r-Rotor sealing surface radius

[0135] v - blade tip radius

[0136] f- The offset distance between the center axis blade shaft and the radius of the shell inner hole.

Claims

1. A rotary machine for fluid processing, comprising a static housing (2), the static housing (2) having a first port and a second port (H, L) for allowing fluid to flow out of and into the rotary machine; the rotary machine comprising a rotor body (4) attached to a main shaft (3), the main shaft (3) being arranged in the static housing (2), the rotor body (4) having a central axis (R), the central axis (R) being arranged at an offset distance (e) from the central axis (M) of the main shaft (3); the rotary machine also comprising a sealing blade (5, 5') having a blade tip (6, 6') and a blade movement system (8, 8'), the blade movement system (8, 8') being operatively connected between the rotor body (4) and the sealing blade (5, 5') for keeping the blade tip sealing surface (6a, 6c) of the blade tip (6, 6') sealedly close to the outside (4b) of the rotor body, characterized in that The rotor body (4) has a lens-shaped cross-section, the lens-shaped cross-section has two different cylindrical sections, the cylindrical sections include a first section and a second section, the first section has an outer surface (4b), the outer surface (4b) has a central axis (R) offset by the offset distance (e) relative to the central axis (M) of the main shaft to form a seal against the blade tip sealing surface (6a, 6c), and the second section has an outer surface (4c), the outer surface (4c) is concentric and co-radial with the casing inner wall (2a) to seal against the casing inner wall (2a) at all positions of the rotor body (4).

2. The rotary machine according to claim 1, wherein: The blade movement system (8') comprises at least one connecting rod (9), one end of which is operatively connected to the rotor body (4), and the other end of which is operatively connected to a pivot arm (11), which is fixedly connected to the blade tip (6').

3. The rotary machine according to claim 2, wherein: The at least one connecting rod (9') is connected to a crank portion (10) on the main shaft (3), and the crank portion (10) is concentric with the outer surface (4b) of the rotor body.

4. The rotating machine according to any one of claims 1 to 3, wherein: The blade tip sealing surface (6a) has a cylindrical or semi-cylindrical shape facing the outer side (4b) of the rotor body.

5. The rotating machine according to any one of claims 1 to 4, wherein: The crank (10) connecting the connecting rod (9) to the main shaft (3) is concentric with the outer face (4b) of the rotor, the pin (12) connecting the connecting rod (9) to the pivot arm (11) is concentric with the semicircular or circular shape of the blade tip (6a), and the length (p) of the connecting rod (9) is equal to the radius (r) of the outer face (4b) of the rotor body plus the radius (v) of the blade tip.

6. The rotary machine according to claim 1, wherein: The blade movement system (8') comprises at least one connecting rod (9') operatively connected to a crank portion (10) on the main shaft (3), the crank portion (10) being concentric with the outer face (4b) of the rotor body, and wherein the blade tip (6') is fixedly connected to the connecting rod (9) and rotatably connected to the blade (5).

7. The rotary machine according to claim 6, wherein: The blade tip (6') has a semi-cylindrical surface (6c) and a semi-cylindrical surface (6b), wherein the semi-cylindrical surface (6c) is concentric and co-radial with the outer surface (4b) of the rotor body, and the semi-cylindrical surface (6b) is concentric with the rotation axis between the blade tip (6') and the blade (5').

8. The rotating machine according to any one of claims 1 to 7, wherein: The rotary machine further comprises a blade support mechanism (20) which is arranged between the housing (2) and the sealing blades (5, 5') for controlling / adjusting the positions of the sealing blades (5, 5').

9. The rotary machine according to claim 8, wherein: The blade support mechanism (20) comprises a cavity (K) located in the housing (2), the cavity (K) opening toward the blade (5), so that the cavity (K) and the blade sealing surface (5a) form a closed chamber; The blades (5, 5') have a protrusion (21) which forms a seal towards the inner wall (2b) of the cavity (K) of the housing, dividing the closed chamber into a first closed volume (A) and a second closed volume (B).

10. The rotary machine according to claim 7 or 8, wherein: The blade support mechanism (20) further comprises a fluid regulating arrangement (22, 23, 24, 25) for regulating the pressure of the first volume and / or the second volume (A, B) to control the movement of the blade (5, 5').

11. A rotating machine according to any one of claims 8 to 10, wherein: The blade support mechanism (20) includes one or more mechanical springs.

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