KR20220128871A - vane motor - Google Patents

Abstract

The present invention relates to a vane motor. The vane motor includes: a casing having a gas inlet and a gas outlet which pressurized gas is input and discharged through; and a rotor rotating around a rotation shaft mounted on the casing by receiving pressure of the pressurized gas in the casing. The rotor includes: a cylindrical rotor body with a center axis corresponding to the rotation shaft; and a vane installed in a groove formed on a side of the rotor body, wherein the width of the vane protruding from the groove is changed according to the rotation phase. The vane in the groove can easily move from the groove to the outside as the gas flows into a lower space of the groove. According to the present invention, the vane can be easily moved from the groove to the outside in the vane motor by an action of the gas which is put into the bottom of the groove. Therefore, the vane motor can be prevented from becoming less efficient since the pressurized gas is easily leaked from the pressurized gas space between the vanes to an adjacent space.

Description

vane motor

The present invention relates to a vane motor, and more particularly, to a configuration capable of increasing output efficiency during smooth initial start and low-speed rotation in a vane motor capable of generating rotational force through pneumatic pressure.

A vane motor is one of the mechanical devices that converts gas pressure into rotational power. 1 shows an example of a conventional vane motor.

Here, a rotating rotor is installed in the casing 211 , and a part of the casing 211 includes a gas inlet 253 through which a gas applying pressure is introduced and a gas outlet 255 through which the gas is discharged. When the pressure gas is introduced into the gas inlet 253 , the gas pressure extends to the outside of the rotor and acts on the vanes 235 whose extension length is variable. Accordingly, while the vane 235 moves in the pressure direction, the entire rotor rotates within the casing 211 . When the gas that has transmitted the pressure to the vane 235 reaches the gas outlet 255 of the case, it is discharged through the gas outlet 255 with a low pressure.

That is, when the pressure gas entering the gas inlet meets the gas outlet having a low pressure, the pressure gas is applied to the vane 235 in the process to rotate the rotor while exiting the gas outlet.

At this time, the vane 235 is coupled to the rotor body 231 , and the length of the vane 235 protruding from the body 231 may be variable. To this end, the vane 235 is inserted into the groove 231a of the rotor body 231 and can move in the groove 231a in the longitudinal direction of the groove. Since the interval between the inner wall surface of the casing 211 and the rotation shaft 233 of the rotor body 231 is different depending on the position of the inner wall surface of the casing, a large portion of the vane 235 is located in the groove ( 231a), the protrusion length of the vane 235 increases, and in a narrow space, most of the vanes are inserted into the body groove, thereby reducing the protrusion length of the vane.

In order for the vane 235 to smoothly enter and exit the groove 231a of the main body 231, an elastic body such as a spring may be included at the bottom of the groove between the vane and the vane. Alternatively, a separate spring may not be installed because the vane may come out of the groove by the rotational centrifugal force of the rotor.

In a section in which the interval between the rotor body 231 and the inner wall surface is narrowed, when the rotor body 231 rotates, the end of the vane 235 is pressed to be inserted into the groove 231a while in contact with the inner wall surface.

However, in the conventional vane motor, if the gap between the end of the vane 235 and the inner wall surface of the casing 211 is too large, the gas escapes through this gap and causes a loss of pressure. There is a problem in that energy due to the gas pressure is lost due to friction due to the severe friction of the engine, and the cost of replacement and maintenance increases due to the wear of the vane and the inner wall surface. Since these problems are in a trade-off relationship with each other and cannot be completely solved in conventional vane motors, the most efficient and durable The appropriate gap size must be determined.

In addition, in order to increase the rotational force of the rotor by the gas pressure, on the other hand, a method of increasing the gas pressure or increasing the area of the vanes to which the gas pressure acts may be used.

However, as a method of increasing the area of the vane where the gas pressure acts, for example, if the vane protrudes too far from the groove, it may completely disengage, or vibration or other unstable conditions may occur while the vane is rubbed against the inner wall of the casing, so that the rotor is stable and stable. It becomes important to form a design that increases the connection area with the gas within the limit of maintaining the bond.

On the other hand, in order to increase the efficiency of the vane motor, it is necessary to obtain more output with as little gas as possible when supplying gas of the same pressure. In the case of a mobile device, it is more important to obtain more output with the same amount of air. .

In order to increase the efficiency, as mentioned earlier, the pressure gas supplied to the inside does not apply sufficient pressure to the vane, and it meets the outlet prematurely and is discharged, or leaks undesirably through a gap, or occurs between a moving part and a fixed part adjacent to it. It can be generally considered to reduce friction.

In addition, in order to increase the efficiency of the vane motor, it is necessary to develop a path and configuration in which the pressure gas acts on the vanes so that the pressure effectively acts on the vanes and the driving force or impact of the gas acting on the vanes works efficiently.

However, in the existing vane motor, the vane should easily come out of the groove and enter easily and there should be no problem in moving in the groove. It can be a very serious problem because the pressure gas cannot be tightly sealed and maintained in the space between the vanes and the vane due to poor adhesion to the casing, and the pressure gas cannot sufficiently transmit the rotational force to the rotor due to the leakage of the pressure gas.

In particular, when the vane of the vane motor has to come out of the groove to adhere to the inner surface of the casing, the centrifugal force is sufficiently applied when the vane motor is normally driven and the rotor rotates well. There are many cases where the vane cannot easily come out of the groove because it does not rotate at high speed.

To prevent this problem, a spring can be installed in the groove and the spring can push the vane outward from the groove by using the restoring force of the spring. Friction may increase to prevent rotation of the vane rotor, and there may be trouble due to the presence of springs during manufacturing and management.

Republic of Korea Patent Registration 10-1116511: Air vane motor with liner Republic of Korea Patent Registration 10-1874583: Vane Motor Korean Patent Application 10-2019-0171084: Vane Motor

An object of the present invention is to provide a vane motor having a configuration capable of solving a problem in the case in which the vane does not easily come out of the groove in the conventional vane motor described above.

According to one aspect of the present invention, it is an object of the present invention to provide a vane motor having a configuration that can prevent excessively pushing the vanes to the inner surface of the casing in the overall driving while allowing the vanes to come out easily from the grooves when necessary do it with

An object of the present invention is to provide a vane motor having a configuration that can increase the efficiency of the vane motor by properly coming out and entering the vane from the groove of the rotor.

The present invention for achieving the above object,

A casing having a gas inlet and a gas outlet through which the pressure gas is input and discharged, and a rotor configured to rotate about a rotary shaft mounted on the casing by receiving the pressure of the pressure gas within the casing, wherein the rotor coincides with the rotary shaft In the vane motor having a generally cylindrical rotor body having a central axis of It is characterized in that it is made so that the vane in the groove can be easily moved outward from the groove by introducing a.

The present invention may be such that gas is introduced into the lower space of the groove at a position before the pressure gas is supplied to the space behind the vane after the position at which the vane is inserted into the groove during the rotation of the vane rotor.

In the present invention, a passage for discharging gas from the space below the groove may be provided in at least a part of a section in which the vane enters the groove during rotation of the vane rotor.

In the present invention, the casing includes a cylindrical portion and a finishing plate for closing both ends of the cylindrical portion in the longitudinal direction, and gas inlet grooves connected to the rear surface of the vane are formed on both ends of the body of the vane rotor, and both ends of the cylindrical portion of the casing are closed. When the body of the rotor rotates, a gas inlet is formed at a position overlapping the trajectory of the gas inlet groove to supply pressure gas to the space behind the vane (space between the vane and the vane).

In this case, in the present invention, the gas inlet for the air spring for supplying gas to the space below the groove may be installed together with the gas inlet for rotor rotation on the closing plate, and the position of the gas inlet for the air spring in the closing plate is the groove It can be installed at a position where the lower or lower end of the rotor overlaps with the moving trajectory according to the rotation of the rotor.

In particular, the position of the gas inlet for the air spring is made such that the pressure gas flows into the lower space of the groove at a position before the pressure gas is supplied to the space behind the vane after the position where the vane is maximally inserted into the groove (the position on the rotor rotation). can

Once the vane comes out of the groove well, the gas pressure in the lower part of the groove is almost unnecessary, so at the rotor rotation position, a gas discharge port for an air spring for discharging the gas under the groove can be installed, and this gas discharge port is also closed It may be installed on the plate, and for this purpose, a gas outlet may be installed at a position overlapping the trajectory of the lower part of the groove in the finishing plate.

Even in the present invention, it is preferable that at least a portion of the gas inlet for supplying the pressure gas for the rotor rotation overlaps with any gas inlet groove at any time so that the pressure gas can transmit the rotational force to the rotor when the vane motor is initially driven.

In the present invention, a valve capable of controlling the gas inlet for the air spring may be installed so that gas can be supplied to the gas inlet for the air spring only at the initial stage of driving the vane motor.

In the present invention, the vanes of the vane rotor may be configured to perform an angular motion reciprocating in a circular arc section rather than reciprocating a straight section when entering and exiting the vane groove.

In the present invention, the groove may have a predetermined angle with the radial direction extending outward from the rotation axis of the rotor body when the vane is coupled to the rotor body and may be formed so as to be inclined in the direction in which the rotor rotates.

In the present invention, a gas inlet groove connected to the space between the vane and the vane is formed on the surface of the body end surface of the vane rotor (surfaces at both ends in the rotational axis direction of the cylindrical rotor), and the casing closes the cylindrical part and both ends of the cylindrical part In the case of forming a pressure gas inlet (gas inlet) at a position overlapping the trajectory of the gas inlet groove when the main body of the vane rotor rotates on the closing plate, between the rotor and the cylindrical part of the casing is provided with an inner cylinder capable of rotating according to the rotation of the rotor inside the cylindrical portion, and the rotor may be configured to rotate within the inner cylinder.

At this time, the inner cylinder is made of a cylindrical shape to accommodate the rotor in the casing and hold the pressure gas inside until the pressure gas injected through the inlet of the casing is discharged through the outlet of the casing. The imaginary rotational center axis position within the imaginary axis of rotation is parallel to but spaced apart from the rotation axis, but may be configured to rotate together when the rotor rotates.

In this case, the vane motor rotates the rotor and when the gas inlet groove (extended part) comes to a position where the gas inlet overlaps with the gas inlet of the finish plate, the pressure gas can be introduced into the space between the rotor body and the inner cylinder through the gas inlet groove at the gas inlet. , may be made to apply a force to the rear surface of the vane, at this time, the virtual rotational center axis of the inner cylinder and the rotation axis of the rotor within the casing maintain a constant position, and when the inner cylinder rotates within the casing, the outer surface of the inner cylinder A rolling means may be further provided to reduce friction between the and the inner wall surface of the casing.

According to the present invention, the vane can easily come out of the groove in the vane motor due to the action of the gas injected into the bottom of the groove, so that the pressure gas easily leaks from the pressure gas space between the vane and the vane to the adjacent space, so that the efficiency of the vane motor is falling can be prevented.

According to an aspect of the present invention, by allowing the air spring action to be made when necessary or limited to the required section, the vane is rubbed with the inner surface of the casing constituting the pressure gas space with excessively large pressure to the outside in driving the overall vane motor, so that the vane motor efficiency This lowers, and it is possible to reduce the problem that the contact portion is damaged by friction.

1 is a perspective view showing a conventional vane motor configuration;
2 is an external perspective view showing an external appearance in an embodiment of the present invention;
Figure 3 is an exploded perspective view of the vane motor as in Figure 2;
Figure 4 is a perspective view showing the rotor body including the rotation shaft of the vane motor as in Figure 2;
5 is a side perspective view showing the coupling relationship between the cylindrical inner surface of the casing and the rotor in the vane motor as shown in FIG. 2;
6 is a perspective side view showing the relative positional relationship between the gas inlet, the gas inlet for the air spring, the gas outlet and the gas inlet groove of the rotor, the groove and the vane when the finish plate is further coupled in the state of FIG. 5 .
7 is an exploded perspective view showing a partially assembled state to show the coupling relationship between the cylindrical inner surface of the inner cylinder and the rotor in another embodiment having an inner cylinder of the vane motor of the present invention;
Figure 8 is a perspective side view showing the relative positional relationship of the gas inlet, the gas inlet and the gas outlet for the air spring of the closing plate, the gas inlet groove, the groove and the vane of the inner cylinder and rotor in the same embodiment as in Figure 7;
9 is a side view of a vane motor constituting a third embodiment of the present invention;
Figure 10 is a side view showing a state in which the finish plate is removed in the embodiment of Figure 9;
11 and 12 are a perspective view and a side view of a rotor part of a vane motor constituting a fourth embodiment of the present invention;
13 is a perspective side view showing the relative positional relationship between the gas inlet, the gas inlet for the air spring, and the gas outlet of the finish plate, and the gas inlet groove, groove, and vane of the inner cylinder and rotor when the finish plate is further coupled to FIG. 12 .

Hereinafter, the present invention will be described in more detail through specific examples with reference to the drawings.

(Example 1)

Fig. 2 is an external perspective view showing an external appearance in an embodiment of the present invention, and Fig. 3 is an exploded perspective view of this embodiment.

In the present embodiment, the entire vane motor includes a casing forming the outermost shell and a rotor positioned in the casing, and most configurations of the casing and the rotor may be basically similar to those of a conventional vane motor.

For example, the casing includes a casing body 11 having a substantially cylindrical shape and finishing plates 13 and 15 for closing both ends of the body 11 in the longitudinal direction, and each of the closing plates 13 and 15 is connected to the rotor. A rotation shaft installation hole through which the rotation shaft 33 is mounted or passed, an arc-shaped gas inlet 135 through which external high-pressure gas is introduced, and an arc-shaped gas outlet 133 through which high-pressure gas is discharged through the interior are disposed. A bearing 17 is installed in the rotation shaft installation hole, so that the rotation shaft 33 does not come into direct contact with the finish plate 13 and can reduce friction during rotation by the bearing 17 . In this configuration, the rotor rotates while in contact with the inner surface 11a of the casing body 11 .

Referring to the perspective view of FIG. 4, the side sectional view of FIG. 5, and the perspective side view of FIG. 6 showing the rotor body 31 including the rotation shaft 33 of the vane motor as in FIGS. A gear 37 for power transmission to the furnace is formed. As a means of transmitting power to the outside, in addition to gears used for power transmission using gears, pulleys, chains, friction plates, etc. that can transmit power by hanging a belt or rope may be used. , the transmission means may be further combined and used.

The grooves 31a formed to install the vanes 35 in the rotor body 31 may be formed in various other shapes as needed. In this embodiment, a plurality of grooves 31a are installed parallel to each other in the longitudinal direction at the portion forming the cylindrical side surface of the main body 31, and the same circumferential angle or They are installed at the same distance apart from each other by the same circumferential distance. The vanes moving outward and inward along this groove 31a are made of a substantially rectangular plate material. Depending on the angle at which the groove 31a is installed in the rotor body, the vane may also be formed vertically from the side of the cylindrical rotor body 31, but here it protrudes in an inclined direction to have a predetermined angle with the vertical plane. That is, it has a certain angle with the radial direction centered on the rotation shaft 33 and is slightly inclined in the direction in which the rotor rotates, and accordingly, the vane also protrudes from the side of the body to be slightly inclined in the direction of rotation based on the vertical direction. .

And, as mentioned above, the casing in this embodiment has a cylindrical portion and a finishing plate for finishing both ends of the cylindrical portion in the longitudinal direction, and a gas inlet groove connected to the rear surface of the vane is formed on the surface of both ends of the body of the vane rotor, A gas inlet is formed on the finishing plate that closes both ends of the cylindrical part of the casing at a position that overlaps with the trajectory of the gas inlet groove when the rotor body rotates, so that the pressure gas is supplied to the space behind the vane (space between the vane and the vane). .

Here, the vane 35 is installed to have a small gap in the groove 31a, and when the rotor rotates, it always tends to protrude outward according to the centrifugal force, but is limited by the inner wall surface of the casing body 11, and the casing body The inner wall surface of the 11a applies a force in the direction of the groove 31a to the vane 35 as the rotor rotates.

Furthermore, in this embodiment, a gas inlet 137 for an air spring capable of supplying pressure gas to the lower portion that is not completely filled even when the vane 35 is completely inserted from the groove 31a is installed on the finish plate. The gas inlet 137 for the air spring is formed adjacent to the gas inlet 135 for supplying the pressure gas to give a rotational force to the rotor, and the pressure gas flowing into these gas inlets 135 and 137 is the same pressure gas source. may be supplied from, these gas inlets may be connected to a separate gas source, and in some cases may be simply connected to the atmospheric pressure space.

After the position where the vane 35 is maximally inserted into the groove 31a during the rotation of the rotor, the pressure gas for the air spring is supplied through the gas inlet 137 for the air spring at the position before the pressure gas is supplied to the space behind the vane. It flows into the lower space of the groove 31a.

The pressure gas input into the groove lower space causes a high pressure to act on the lower space of the groove 31a, and a high pressure also acts on the lower end of the vane 35 to push the vane 35 toward the inlet of the groove 31a. will do Even if there is some gap between the groove and the vane, there is not much gas leakage during the short time when the vane starts moving outward, so the pressure drop due to the pressure gas leakage in the groove is not large.

The section where the gas inlet 137 for the air spring and the lower end of the groove 31a overlaps is short, so only a limited amount of pressure fluid flows in, and as the vane moves outward from the groove, the space under the vane in the groove increases. The pressure gas becomes smaller than the initial flow, and the frictional force at the point where the outer end of the vane is in contact with the inner surface of the casing is not large. That is, in the initial stage when the vane goes out of the groove, it can move the vane with a large force to prevent leakage of pressure gas between the vane end and the inner surface of the casing. It does not cause a problem to interfere with rotor rotation, and ultimately serves to increase the efficiency of the vane motor.

And when the rotor continues to rotate at the rotational position where the pressure gas inflow for the air spring and the pressure gas inflow for imparting a rotational force to the rotor are made, the separation distance between the side surface of the rotor body 31 and the inner surface of the casing 11a is gradually increased. As the space between them increases, the distance between them gradually decreases as the space between them gradually decreases.

Since there is a certain gap between the groove 31a and the vane 35, a significant amount of the pressure gas in the space under the groove can move or leak out of the groove while the rotor rotates close to one rotation, so that the rotor body 31 ) In the rotor rotation section where the separation distance between the side surface and the casing inner surface 11a is reduced, and the space between them is reduced, the gas pressure in the space under the groove 31a strongly prevents the vane 35 from entering toward the bottom of the groove. If necessary, as in the case of forming the gas inlet 137 for the air spring, a gas outlet (not shown) for the air spring is formed at some positions overlapping the movement trajectory of the bottom of the groove when the rotor rotates to release the gas inside the groove. It is also possible to further reduce the gas pressure by releasing.

As in the case of a general vane pump, where relative movement is made while in contact with each other, for example, the rotor body and both ends of the vane in contact with the finish plate are configured to be able to slide with each other and the pressure gas is difficult to leak. For example, the gap between them should not be large, but the material should be selected so that friction is not severe because it is too close, and the coefficient of friction is small without being easily damaged.

On the other hand, in this embodiment, as mentioned briefly above, a gas inlet groove is formed. In particular, among the inlets forming grooves at both longitudinal ends of the groove coupling the rotor body and the vane, the rear inlet at the rear based on the rotational direction is partially A gas inlet groove is installed to further reveal the rear surface of the vane by removing it. The curved surface constituting the gas inlet groove forms a concave surface when viewed from the inlet of the groove toward the inside of the groove and when the rotor body is viewed from the longitudinal end to the center. easily formed.

And, when forming the gas inlet 135 on the finish plate 13 to overlap the gas inlet groove 31b, the gas inlet 135 overlaps with a certain section of the trajectory of the gas inlet groove 31b. It may be formed in an arc shape, but as shown in the figure, it may be formed in a plurality of arcs arranged along the arc instead of the arc shape continuing for a certain section.

According to this configuration, when the rotor rotates and the gas inlet groove 31b comes to a position where the gas inlet 135 overlaps with the gas inlet 135 of the finishing plate, the pressure gas flows from the gas inlet through the gas inlet groove to the rotor body 31 and the inner surface of the casing 11a. ) can be introduced into the 'space' that is the space between the vanes 35 and the space between the vanes 35, and in the process, an impact force is applied to the rear surface of the vanes.

When the gas inlet groove does not overlap the gas inlet after a certain period passes, the gas inlet is blocked by the opposite surface of the closing plate of the rotor body, and the pressure gas inflow is stopped in the space behind the vane to which the gas inlet groove belongs.

The gas outlet 133 is installed in the section where the space between the vanes is gradually reduced, and the gas outlet does not necessarily overlap the gas inlet groove 31b unlike the gas inlet. Rather, it is between the rotor and the inner surface of the casing to facilitate gas discharge. It can overlap the space widely.

(Example 2)

Referring to the second embodiment of the vane motor of the present invention shown in Figures 7 to 8,

In this embodiment, the cylindrical inner cylinder 20 is further installed inside the casing as compared to the previous embodiment 1. The inner tube 20 has substantially the same length as the casing body 11 so that the inner surfaces of the closing plates 13 and 15 of the casing and the longitudinal ends of the inner tube 20 are in contact with each other through a fine gap, and the inner tube ( 20) is rotated, it may cause friction that slides with the inner surfaces of the finishing plates 13 and 15. The inner cylinder 20 is placed on the plurality of rolling means 19 of the recess 119 installed in the inner wall of the casing body 11 when installed. Here, the rolling means is made of a rolling stand (19b) and a roller (19a), and the rolling stand (19b) may be formed in a cylindrical shape or a rotating shaft form, and is installed to be rotatably parallel to the rotating shaft (33) in the casing body (11) When the inner cylinder 20 rotates, the rolling rod in contact with the outer surface of the inner cylinder rotates to prevent sliding friction caused by the inner cylinder rotation between the inner cylinder 20 and the inner wall of the casing body 11 .

A rotor having a cylindrical rotor body 31 having a rotating shaft 33 and a vane 35 coupled to a groove 31a of the rotor body 31 is installed in the inner cylinder 20 . The length of the cylinder constituting the rotor body 31 is also substantially the same as the length of the casing body 11, so that when the rotor rotates, the inner surfaces of the finishing plates 13 and 15 and the surfaces of both ends of the cylinder are in contact with each other with a fine gap interposed therebetween. while creating sliding friction.

The rotation shaft 33 of the rotor is installed parallel to the virtual rotation center axis of the inner cylinder 20, but spaced apart from each other by a certain distance. In the closing plates 13 and 15 of the casing, there is a hole through which the rotation shaft 33 installed in this way passes or is caught. The position of the hole is also spaced apart from the central axis of rotation of the cylinder formed by the casing by a certain distance.

With this configuration, the rotor in the casing body 11 pushes the cylindrical inner cylinder 20 to the side where the rolling means 19 of the casing body 11 is located, thereby forming the casing body by pressing the virtual rotational center axis of the cylinder and the cylinder. The virtual axis of rotation of the inner cylinder 20 is also spaced apart from each other by a predetermined distance. The distance between the rotor body 31 and the inner wall surface of the inner cylinder 20 is minimized at the place where the rotor contacts the inner cylinder 20 while pushing the inner cylinder 20, and the vane 35 completely enters the groove 31a so that the rotor body 31 moves into the inner cylinder ( 20) or the vane 35 protrudes from the body 31 becomes smaller. On the other side (opposite to the axis of rotation), the distance between the rotor body 31 and the inner wall surface of the inner cylinder 20 becomes the maximum, so that the protruding width of the vane 35 from the rotor body 31 becomes large.

The normal action of the vane motor in which the pressure gas flows into the gas inlet and acts on the vane to rotate the rotor, and the pressure gas is discharged to the gas outlet, even in a vane motor having an inner cylinder, except that the inner cylinder is replaced by the inner cylinder. can be applied similarly.

However, here as in the previous embodiment, even when the vane 35 is completely inserted from the groove 31a, the gas inlet 137 for the air spring capable of supplying the pressure gas to the lower part that is not completely filled is provided on the finish plate 13. installed.

After the position where the vane is maximally inserted into the groove during the rotation of the rotor, the gas inlet 137 for the air spring may temporarily overlap with the lower end of the groove 31a at the position before the pressure gas is supplied to the space behind the vane, At this time, the pressure gas for the air spring flows into the lower space of the groove 31a through the gas inlet 137 for the air spring. The pressure gas input into the groove lower space causes a high pressure to act on the groove lower space, and a high pressure also acts on the lower end of the vane 35 to push the vane toward the inlet of the groove.

In the state where the existing vane motor is continuously driven, when the rotational speed of the rotor exceeds a certain level, the centrifugal force on the vanes also increases. Therefore, the vane 35 moves outward from the groove 31a so that the outer end of the vane replaces the inner surface of the casing. Although there is no big problem in close contact with the inner cylinder 20, the vane 35 does not move outward from the groove 31a because the centrifugal force is not sufficient when the rotor does not reach a sufficient angular velocity at the initial stage of driving the vane motor. can't At this time, as a factor impeding the movement of the vane, friction at the contact surface between the vane 35 and the groove 31a and the formation of negative pressure as the vane lower space expands when the vane exits the groove may be considered.

A gap is widened between the outer end of the vane 35 and the inner tube 20, and the pressure fluid that gives rotational force to the rotor may leak into the adjacent space without applying sufficient pressure to the rear surface of the vane 35, but in this embodiment, the driving Even in the initial stage, the pressure gas flowing into the lower groove 31a sufficiently lifts the vane 35 so that there is no pressure gas outflow between the outer end of the vane and the inner cylinder 20 inner surface.

(Example 3)

9 is a side view of a vane motor constituting a third embodiment of the present invention, and FIG. 10 is a side view showing a state in which the finishing plate is removed in the embodiment of FIG.

In this embodiment, there is a common point in that the gas inlet 235 is installed along the trajectory of the gas inlet groove 31b' when the rotor rotates, but at least some of the sections between the plurality of vanes do not allow pressure gas inflow. This is the injection section. In order to achieve a no-ejection section, a gas inlet groove 31b' connected to the space between the vanes 35 and the vanes is formed on the end surface of the rotor body 31' here, and the rotor body 31' is rotated on the finishing plate. When the gas inlet groove (31b ') moves, a pressure gas inlet (gas inlet: 235) is formed at a position overlapping the moving trajectory to supply pressure gas to the space between the vanes, but the gas inlet (235) when the rotor rotates. The gas inlet grooves 31b ′ communicating with are formed in a number smaller than the number of vanes 35 so that only some of the spaces between the plurality of vanes are connected to the gas inlet grooves 31b .

Accordingly, there is no corresponding gas inlet groove 31b ′ in the section or space between the remaining vanes, and the pressure gas does not flow because it does not communicate with the gas inlet 235 , so that these sections form a non-jet section. Here, in particular, in the section between the vanes, the non-eject section and the injection section are alternately located, and the size of the non-eject section and the injection section are the same, but depending on the embodiment, the length of the section between the spray section and the non-eject section is different, The installation ratio may vary, such as one injection section for every two non-ejection sections, or two injection sections for each non-eject section.

In addition, if the gas inlet 235 is composed of three arcs instead of a simple arc shape, and the central angle corresponding to the arc in Embodiment 1 is approximately 60 degrees, here, as shown in FIG. 10 , it corresponds to three arcs The difference is that, for example, the central angle reaches 111.7 degrees, so that the gas inlet is formed over a larger range.

Due to this difference, at least one of the three arcs constituting the gas inlet is overlapped with the gas inlet groove 31b' of the injection section. This overlapping state with the injection section may have a very important meaning in starting the vane motor.

For example, when the vane motor is first driven in the first embodiment, the gas inlet may be in a position overlapping the gas inlet groove of the injection section, but may be completely blocked by the surfaces of both ends of the rotor body in the non-ejection section.

If the gas inlet overlaps the gas inlet groove, the same action as described above occurs immediately after the pressure gas flows in through the gas inlet, and the rotor receives rotational driving force from the pressure gas to perform rotational driving. If it is located in the section and is blocked by the surfaces of both ends of the rotor body, the rotor cannot receive rotational force at all and the vane motor cannot start operation.

In this case, if the rotor is forcibly turned a little by an external force when starting the vane motor, the gas inlet may enter the injection section overlapping the gas inlet groove according to the rotation, and thus the rotation of the rotor may be continuously performed. However, a separate starting device for forcibly returning or manual operation is required, which can make operation of the vane motor very cumbersome.

However, in the present embodiment, regardless of the rotational position or phase of the rotor body 31', at least a partial area of the gas inlet 235 overlaps the injection section in which the gas inlet grooves 31b' on both ends of the rotor body are formed. will do Accordingly, the vane motor can always be started without a problem even without a separate starting device or manual operation.

In addition, when the three gas inlets are opened for the purpose of starting, increasing torque, and driving, and the rotor maintains a constant rotation speed, the gas inlets 235 may be blocked in a counterclockwise order to reduce pressure gas consumption.

On the other hand, according to the description of the previous embodiment 1, in the section between the vanes between the front vane and the rear vane constituting the no-eject section, the gas inlet grooves 31b' are not installed on the surfaces of both ends of the rotor body 31', so the no-eject section In , even when the surfaces of both ends of the rotor body 31' overlap with the gas inlet 235, the gas inlet 235 is closed by the surfaces of both ends of the rotor body 31', and as the rotor rotates, the rotor body 31' ) and the casing body 11' are gradually spaced apart, and even if the space between them is increased, there is no pressure gas inflow, so there is no impact or pressure action of the pressure gas on the rear surface of the front vane, contributing to the rotor rotation in the vane motor there will be no

However, if the volume of the space is increased in the non-injection section without gas inflow, the space becomes a vacuum state in which a significant negative pressure is applied. Such a negative pressure may increase the fear that the pressure gas in the injection section will leak into the non-eject section, may interfere with the rotation of the rotor, and when the space of the non-eject section of this negative pressure meets the gas outlet 233, the gas outlet ( 233), the rapid inflow of gas into the space causes vibration and noise, which may cause a problem of reducing the efficiency of the vane motor.

In order to solve this problem, in this embodiment, a passage connected to the space of the non-ejection section is installed. As such a passage, for example, as shown in FIG. 10 , a ring-shaped passage is outside the rotation axis when viewed from the rotation shaft 33 on both end surfaces of the rotor body 31 ′ and slightly more central than the innermost end of the groove 31a. A groove 31c) may be formed, and a passage hole 31d may be formed in a portion of the passage groove 31c.

Although not clearly shown here, the passage hole 31d is connected to the side of the rotor body in the non-ejection section through the rotor body 31'. And any side of the rotor body in any non-ejection section is connected to at least one of the passage holes 31d. In addition, all of the passage holes (31d) here are connected to each other by a ring-shaped passage groove (31c) so that air can be exchanged with each other. As a result, the space between the rotor side and the case of all non-ejection sections is connected to each other so that air can be exchanged.

If at least one of the non-eject section is connected to the pressure gas outlet or the gas outlet 233, the space of all non-eject section can always have an air pressure close to the air pressure of the gas outlet 233, and excessive negative pressure is applied to the vane motor. It can effectively prevent vibration, noise and inefficiency.

In addition, here as in the previous embodiment, a gas inlet 235 for an air spring that can supply pressure gas to the lower portion that is not completely filled even when the vane 35 is completely inserted from the groove 31a is installed on the finish plate. .

After the position where the vane 35 is maximally inserted into the groove 31a during the rotation of the rotor, the gas inlet 237 for the air spring at the position before the pressure gas is supplied to the space behind the vane 31a and the lower end of the groove 31a. It may overlap temporarily, and at this time, the pressure gas for the air spring is introduced into the lower space of the groove 31a through the gas inlet 237 for the air spring. The pressure gas input into the groove lower space causes a high pressure to act on the groove lower space, and a high pressure also acts on the lower end of the vane 35 to lift the vane toward the inlet of the groove.

At the initial stage of vane motor driving, if the rotor does not reach sufficient angular velocity, the centrifugal force is not sufficient, so the vane cannot move outward from the groove. Since it cannot apply sufficient pressure to the vane and may leak into the adjacent space, the configuration of supplying the pressure gas to the lower part of the groove as in the present invention is particularly important, so the gas inlet 237 for the air spring acts only at the initial stage of driving, and sufficient After the rotor rotation is made, it is also possible to block the gas inlet 237 for the air spring by a separate means, or to block the pipe supplying the pressure gas to the gas inlet for the air spring.

(Example 4)

11 and 12 are a perspective view and a side view of a rotor part of a vane motor constituting a fourth embodiment of the present invention, and FIG. 13 is a gas inlet of the closing plate when the closing plate is further combined in FIG. 12, the air spring gas It is a perspective side view showing the relative positional relationship between the inlet and gas outlet, the gas inlet groove of the inner cylinder and the rotor, the groove and the vane.

Similar to the previous embodiment, in this embodiment, the vane motor also includes a casing forming the outermost shell and a rotor positioned within the casing, and except as specifically described herein, generally similar to the configuration of the existing casing and rotor. can be done For example, the casing includes a casing body 311 having a substantially cylindrical shape and a finishing plate (not shown) for closing both ends in the longitudinal direction of the casing body 311 .

The rotor body 330 is formed in a cylindrical or thick disk shape, and a vane guide groove 331a in which a vane 335 is installed is formed on the side of the cylinder. At least one of the finishing plates, here, all of which are provided with a rotating shaft installation hole through which the rotor rotating shaft is mounted or passed. The rotating shaft may be integrally formed with the rotor.

However, unlike the previous embodiment, in this embodiment, there is a difference in the mutual coupling and operation method of the rotor and the vanes, and the vanes, which are grooves formed on the side of the rotor body 330 to guide the vanes 335 and 335 accordingly. There is a difference in the shape of the guide groove (331a). That is, the vane 335 is made of a thick plate shape having an arc shape when viewed from a side view, and the vane guide groove 331a is made of an arc-shaped groove capable of accommodating the vane 335 .

In addition, the vane 335 is connected to the hinge shaft 339 installed on a part of the rotor body 330 by a link rod 337 installed on one side of the vane (the front side when considering the rotation direction), and this link rod It is rotatably coupled to the rotor body 330 by the 337 and the hinge shaft 339 .

The link rod 337 and the hinge shaft 339 may not be formed over the entire thickness of the rotor (the entire length in the direction of the rotation axis) but may be formed over a partial thickness, and here, one is formed in the middle of the direction of the rotation axis of the rotor. Of course, the link rod may be formed at a position facing the finish plate at one end in the direction of the rotation axis of the rotor, with a thickness smaller than the thickness of the rotor, and another link rod is installed at the other end in the direction of the axis of rotation of the rotor so that two are symmetrical at both ends in the direction of the rotation axis. can be installed, and in this case, the vane can be supported on the rotor for more stable reciprocating angular motion.

In addition, the link rod 337 is coupled to the upper end of the vane 335 (outermost relative to the rotational center axis of the rotor), and the hinge shaft 339 is installed on the surface layer (outer layer) of the rotor body 330 . Therefore, here, when the vane 335 is maximally accommodated in the vane guide groove 331a, the link rod receiving groove of the rotor is formed to a minimum depth at one end, so that installation is easy, and the volume occupied by the link rod can be minimized. However, it is preferable that the link rod receiving groove has a little extra depth so that the link rod 337 does not directly collide with the rotor body 330 to generate vibration when the vane 335 moves, and the vane guide groove 331a ) is also desirable to have some extra depth.

Here too, when forming the gas inlet groove, in particular, at both ends in the longitudinal direction of the vane guide groove 331a for coupling the rotor body 330 and the vane 335, the rear portion of the inlet that forms the vane guide groove in the rotational direction at the rear At the inlet, the rotor body 330 is partially removed to provide a gas inlet groove 331b to further reveal the rear surface of the vane 335 . The curved surface forming the gas inlet groove 331b has a concave surface so that the pressure gas injected into the gas inlet 345 can easily apply pressure to the rear surface of the vane.

Also, as shown in FIG. 13 here, as in the previous embodiment, even when the vane 335 is completely inserted in the groove 331a, the gas inlet for the air spring that can supply the pressure gas to the lower portion that is not completely filled (347)) is installed on the finish plate.

After the position where the vane is maximally inserted into the groove during the rotation of the rotor, the gas inlet 347 for the air spring may temporarily overlap with the lower end of the groove at the position before the pressure gas is supplied to the space behind the vane, and at this time, the air spring The pressure gas for the air spring flows into the lower space of the groove through the gas inlet. The pressure gas input into the groove lower space causes a high pressure to act on the groove lower space, and a high pressure also acts on the lower part of the vane to lift the vane toward the inlet of the groove.

In the above, the present invention has been described through limited examples, but these are only illustratively described to help the understanding of the present invention, and the present invention is not limited to these specific examples.

Accordingly, those of ordinary skill in the art to which the present invention pertains will be able to make various changes or application examples based on the present invention, and it is natural that such modifications or application examples belong to the appended claims.

11, 11', 311: casing body 13, 15: finish plate
17: bearing 19: rolling means
20: inner cylinder 31, 31', 330: rotor body
31a, 331a: groove 31b, 31b', 331b: gas inlet groove
33, 333: rotation shaft 35, 335: vane
119: inner wall concave portion 135, 155, 235, 345: gas inlet
133, 153, 233, 343: gas outlet
137, 237, 347: gas inlet for air spring

Claims (7)

A casing having a gas inlet and a gas outlet through which the pressure gas is input and discharged, and a rotor configured to rotate about a rotary shaft mounted on the casing by receiving the pressure of the pressure gas within the casing, wherein the rotor coincides with the rotary shaft In the vane motor having an overall cylindrical rotor body having a central axis and a vane installed in a groove formed on a side surface of the rotor body and having a width protruding from the groove changes according to a rotational phase,
A vane motor, characterized in that by introducing gas into the space below the groove, the vane in the groove can be easily moved outward from the groove. The method of claim 1,
A vane motor configured to introduce gas into the space below the groove at a position before the pressure gas is supplied to the space behind the vane after the position where the vane is inserted into the groove during the rotation of the rotor. The method of claim 1,
A vane motor, characterized in that a passage for discharging gas from the space below the groove or a gas discharge port for an air spring is provided in at least a part of a section in which the vane enters the groove during rotation of the rotor. 4. The method according to any one of claims 1 to 3,
The casing includes a cylindrical portion and a finishing plate for closing both ends in the longitudinal direction of the cylindrical portion,
Gas inlet grooves connected to the rear surfaces of the vanes are formed on both ends of the rotor body,
The gas inlet is formed in the closing plate at a position overlapping the trajectory through which the gas inlet groove passes when the rotor rotates to supply the pressure gas to the space behind the vane,
The gas inlet for the air spring is installed together with the gas inlet on the closing plate, and the gas inlet for the air spring in the closing plate is installed in a position where the lower end of the groove overlaps the trajectory that moves according to the rotation of the rotor. A vane motor, characterized in that. 5. The method of claim 4,
Between the rotor and the cylindrical portion of the casing is provided with a cylindrical inner cylinder that can rotate according to the rotation of the rotor inside the cylindrical portion,
The inner cylinder holds the pressure gas therein until the pressure gas injected through the gas inlet is discharged through the gas outlet,
The inner surface (inner wall surface) of the inner cylinder is in contact with the outer end of the vane motor made to rotate together with the rotor. 4. The method according to any one of claims 1 to 3,
The vane motor, characterized in that it is configured to make an angular motion to reciprocate in a circular arc section when entering and exiting the groove. 4. The method according to any one of claims 1 to 3,
A vane motor, characterized in that a valve capable of controlling the gas inlet for the air spring is installed so that gas can be supplied to the gas inlet for the air spring only at the initial stage of operation.

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