KR200335236Y1 - A vane pump - Google Patents

Abstract

According to the vane pump according to the present invention, the rotor 20 is composed of an outer case 23 and the inner case 24 assembled to be able to extend a predetermined width in the front and rear longitudinal direction through the elastic force of the spring (26). Accordingly, even if the vane pump is used for a long time and the front and rear surfaces 23a and 24a of the rotor 20 are partially worn out, the front and rear surfaces 23a and 24a of the rotor 20 are before and after the wall 11b of the pumping chamber 11. ) Is continuously maintained in close contact with the rotor 20, thereby improving durability of the rotor 20 as well as having no effect of self-absorption, so that the pumping capability is preserved as it is.

In addition, a plurality of fitting grooves 22 are formed on the outer circumference of the outer case 23 of the rotor 20 at regular intervals in the circumferential direction and concave in the longitudinal direction, and at one end of the vanes 30 in the fitting groove 22. Coupling projections 31 are formed in the longitudinal direction to be fitted and engaged. Therefore, when the wear damage of the vanes (30) can be made easier to replace the maintenance work as an independent object, and also has the advantage of significantly reducing the maintenance cost.

Description

Vane Pump {A VANE PUMP}

The present invention relates to a vane pump (vane pump), and more particularly to a vane pump in which a rotor having a plurality of vanes radially provided to pump the fluid by eccentric rotation in the pumping chamber in the pump housing.

In general, a pump is a device that starts and transfers fluid by receiving power from a driving means such as a motor. A non-enclosed pump that converts energy in an unsealed state, and energy conversion in an enclosed state. This is distinguished by the rising volumetric pump. In the case of the inexpensive pump, the discharge pressure decreases as the discharge amount increases, and there are a centrifugal pump, a four-flow pump, an axial pump, and the like according to the mechanism and structure thereof. The displacement pump has a constant discharge amount regardless of the load pressure, and includes a gear pump, a screw pump, a vane pump, and the like.

Among these volumetric pumps, the vane pump is a type of pump that pushes the fluid sucked between the vanes through the suction port toward the discharge port. FIG. 1 schematically shows the internal structure of the conventional vane pump.

In the conventional vane pump, as shown in FIG. 1, a circular pumping chamber 2 is formed therein, and a pump housing 1 having an inlet 3 and an outlet 4 opposite to left and right, and the pump housing ( Rotor 5 connected to the motor side (not shown) and the rotating shaft while being installed eccentrically in the pumping chamber (2) of 1), and radially provided on the outer circumference of the rotor (5) and the inner wall of the pumping chamber (2) It has a plurality of vanes 6 in close contact with each other.

And the vane 6 is firmly fixed through the tubular coupling member 7 fitted into the rotor 5 and coupled. That is, the plurality of vanes 6 are formed to protrude at regular intervals on the outer circumference of the coupling member 7 made of rubber, and the vanes 6 are folded and folded while contacting the inner wall of the pumping chamber 2 with its elastic restoring force. You lose. In addition, the vanes 6 should be in close contact with the inner wall of the pumping chamber 2 to maintain the airtightness as it rotates toward the suction port 3 to the maximum.

Therefore, when the rotor 5 is eccentrically rotated in the pumping chamber 2 of the pump housing 1 by the start of a motor (not shown), the plurality of vanes 6 are unfolded and folded while frictionally rotating with the wall surface of the pumping chamber 2. The operation is repeated.

At this time, the vanes 6 are unfolded to the maximum toward the suction port 3 and folded up to the maximum in the vicinity of the discharge port 4, so that the fluid between the vanes 6 is pumped through the discharge port 4. In addition, the vanes 6 rotate while being in contact with the wall of the pumping chamber 2 while receiving the least force in the vicinity of the suction port 3 and the greatest force in the vicinity of the discharge port 4. In addition, the front and rear surfaces of the rotor 5 also rotate in close contact with the front and rear wall surfaces of the pumping chamber 2 so that a loss of self-absorption does not occur.

However, in the conventional vane pump, when the long term use is performed, both sides of the vane 6 and the front and rear surfaces of the rotor 5 are also damaged due to friction with the wall of the pumping chamber 2, which causes the wall and vanes of the pumping chamber 2 to be worn. There is a disadvantage in that a gap is generated considerably between the edge of (6) and before and behind the rotor (5).

Therefore, due to the gap between the fluid suction side and the discharge side in the pumping chamber (2) is in communication with each other, this acts as a cause of the loss of self-sufficiency there is a problem that the suction pumping capacity is significantly reduced.

The present invention is to solve this problem, an object of the present invention is to improve the structure of the rotor to provide a vane pump that can be maintained in close contact with the wall of the pumping chamber even if the front and rear of the vane and the rotor is partially worn. It is.

In addition, another object of the present invention is to improve the durability by improving the vane and its installation structure radially provided on the outer periphery of the rotor, as well as to provide a vane pump that can facilitate the maintenance thereof.

Figure 1 shows the internal structure of the conventional vane pump.

Figure 2 is an exploded perspective view showing the overall structure of the vane pump according to the present invention.

3 is a perspective view showing an extract of the coupling structure of the rotor and the vane according to the present invention.

4 is an exploded perspective view of the rotor according to the present invention.

5 is an exploded cross-sectional view taken along the line VV of FIG. 4.

6 is a cross-sectional view showing an assembled state of the rotor according to the present invention.

7 is a cross-sectional view taken along line VII-VII of FIG. 2 according to the present invention, showing the internal structure of the vane pump.

Figure 8 shows the rotor rotation structure of the vane pump seen in the direction of the arrow 도 of FIG.

* Description of symbols on the main parts of the drawings *

10. Pump housing 11. Pumping chamber

12..Inlet 13..Outlet

20. Rotor 21. Rotating shaft

22. Fitting groove 23. Outer case

24. Inner case 25. Storage

26.Spring 30.Vane

40..Motor

The present invention for achieving this object is;

A pump housing having a circular pumping chamber formed therein and provided with an inlet and a discharge port opposite to each other, a rotor eccentrically disposed in the pumping chamber of the pump housing and being rotated by the rotational force of the motor, and a predetermined interval on the outer circumference of the rotor In the vane pump having a plurality of vanes that are radially arranged and rotating while rubbing against the wall of the pumping chamber,

The rotor; An inner case in which the front side is open and has a generally circular side surface with the rear side, and a hub in which the rotating shaft is fitted and coupled to the center portion in the axial direction; An outer case opened at a rear side to accommodate the inner case and having a generally circular side surface with a front side; A coupling member provided between a side of the inner case and a side of the outer case to slidably couple the outer case and the inner case forward and backward in a predetermined width; A spring supported on one end of the outer case front and the other end of the inner case rearward to elastically support the outer case and the inner case in opposite directions; The front and rear surfaces of the rotor are maintained in continuous contact with the front and rear wall surfaces of the pumping chamber.

In addition, a plurality of fitting grooves are formed on the outer circumference of the outer case at regular intervals in the circumferential direction and concave in the longitudinal direction;

The vanes are made of a rectangular rubber plate having a predetermined thickness and length and have a self-elastic force, and one end of the vanes is formed in a lengthwise direction so that the coupling protrusions are fitted into the fitting grooves.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the vane pump according to the present invention includes a pump housing 10 in which a pumping chamber 11 for fluid pumping is formed in a circular shape, and a pumping chamber 11 of the pump housing 10. An eccentrically arranged rotor 20, a plurality of vanes 30 radially arranged at regular intervals on the outer circumference of the rotor 20, and a drive for rotating the rotor 20 together with the vanes 30 The motor 40 is provided.

The pump housing 10 forms an outer shape of the vane pump, and is firmly fixed to the front surface of the drive motor 40 through the bearing assembly 50. Inside the pump housing 10, a circular pumping chamber 11 having an open front surface is formed, and on the left and right sides of the pump housing 10, an inlet 12 and an outlet 13 for guiding suction and discharge of the fluid are provided. Are arranged to face each other. In addition, the front surface of the pump housing 10, the plate-shaped front cover 60 for sealing the pumping chamber 11 is firmly assembled through the four screws (61). Reference numeral "14" denotes an O-ring disposed between the front cover 60 and the front surface of the pump housing 10, by which the pumping chamber 11 is tightly sealed.

As shown in FIGS. 2 and 3, the rotor 20 is disposed eccentrically in the pumping chamber 11, and the rotation shaft 21 of the rotor 20 is directly connected to the bearing assembly 50 to drive the motor 40. Receives the power of Further, a plurality of fitting grooves 22 concave in the longitudinal direction are formed on the outer circumference of the rotor 20 made of a cylindrical body while maintaining a constant interval in the circumferential direction. In the embodiment of the present invention, the fitting grooves 22 are formed in six to form an angle of 60 degrees.

And the vanes 30 are made of a rectangular rubber plate having a predetermined thickness (T) and length (L2) with its own elastic force. In addition, one end of the vanes 30 has a coupling protrusion 31 formed in the longitudinal direction so as to be fitted into the fitting groove 22 of the rotor 20, thereby being detachably assembled. That is, the coupling protrusion 31 of the vane 30 is formed in a shape corresponding to the fitting groove 22, and when the coupling protrusion 31 is inserted into the fitting groove 22, the vanes 30 are separated in the radial direction. It is assembled reliably without being made. The length L2 of these vanes 30 is substantially the same as the length L1 of the outer case 23 of the rotor 20 to be described later (L1 = L2), and when assembled in the pumping chamber 11, the amount thereof The side surface 32 is in contact with the front and rear wall surfaces 11b (see FIG. 2) of the pumping chamber 11.

In addition, the bead part 33 for minimizing the friction area with respect to the wall surface 11b before and behind the pumping chamber 11 is formed in both sides 32 of the vanes 30 so that the rotor 20 may protrude. The thin bead part 33 rotates while rubbing with the wall surface 11b before and after the pumping chamber 11. And the other end of the vanes 30 is continuously rubbed with the circumferential wall (11a (see Fig. 2)) of the pumping chamber 11 in the course of the repetitive progress of the elastic deformation folded and unfolded in accordance with the eccentric rotation of the rotor 20 The pumping chamber 11 is composed of a tapered surface 34 to facilitate sliding friction with the circumferential wall surface 11a.

On the other hand, the rotor 20 is formed into a cylindrical body having a predetermined length (L1) through the synthetic resin, the length (L1) of the rotor 20 pumping chamber 11 in a state that is completely accommodated in the pumping chamber (11) It is preferable to comprise substantially the same as the depth D of (). This is because the front and rear surfaces of the rotor 20 are rotated while being in close contact with the front and rear wall surfaces 11b of the pumping chamber 11 to prevent self-loss loss.

To this end, as shown in Figs. 4 and 5, the rotor 20 has an inner case 24 provided with an open front and a rear face 24a and a circular side face 24b, and the inner case 24. The rear case is opened so that the front housing 23a and the circular side surface 23b are provided so as to accommodate and the side surface 23b of the inner case 24 and the side surface 23b of the outer case 23 are provided. Coupling members 23d and 24f provided between the outer case 23 and the inner case 24 so as to slide forward and backward in a predetermined width and the outer case 23 and the inner case 24 in opposite directions to each other. An elastic support spring 26 is included.

Accordingly, the front and rear surfaces 23a and 24a of the rotor 20 are configured to maintain continuous contact with the front and rear wall surfaces 11b of the pumping chamber 11. The detailed structure of each component is as follows. same.

First, the outer case 23 forms the outer shape of the rotor 20, and is formed through a synthetic resin so that the rear side is opened and has a front surface 23a and a generally circular side surface 23b as described above. The fitting grooves 22 are formed at regular intervals on the side 23b of the outer case 23, and the fluid in the storage space 25 to be described later is discharged to the central portion of the front surface 23a of the outer case 23. A plurality of through holes 23c are drilled. Therefore, when the rotor 20 rotates, a part of the fluid is supplied to a gap between the front surface 23a of the outer case 23 and the front wall surface 11b of the pumping chamber 11 through the through holes 23c, thereby lubricating the oil film. ) Phenomenon, which greatly reduces the frictional resistance between the two surfaces.

In addition, the inner case 24 is manufactured to have an open front side and a generally circular side surface 24b with the rear side 24a so as to be accommodated and coupled to the outer case 23 with ease. Inside the inner case 24, the hub 24c to which the rotary shaft 21 is fitted and coupled is integrally molded in the axial direction, and the side surface 24b of the inner case 24 is the side surface 23b of the outer case 23. Composed of a structure that matches the internal shape, they are fitted together. That is, six grooves 24d are formed along the circumferential direction on the side surface 24b of the inner case 24, which is a portion in which the fitting groove 22 is inserted and coupled to the outer case 23 with a margin. to be.

In addition, when assembling the inner case 24 and the outer case 23, there is formed a storage space 25 for storing a part of the fluid, so as to penetrate in the longitudinal direction inside the side (24b) of the inner case (24) A plurality of guide holes 24e are drilled. Accordingly, a part of the fluid in the storage space 25 is rotated between the rear surface 23a of the inner case 24 and the rear wall 11b of the pumping chamber 11 through the guide holes 24e when the rotor 20 rotates. It is supplied with, and the oil film lubrication phenomenon is generated also here.

In addition, the engaging members 23d and 24f of the rotor 20 have a long hole-type locking hole 23d which is formed to extend in the longitudinal direction on the side surface 23b of the outer case 23, and the locking hole 23d. And a locking step 24f provided to protrude from the side surface 23b of the inner case 24 corresponding thereto. The locking jaw 24f is coupled to be movable in a predetermined width in the locking hole 23d in the front and rear, so that the overall axial length of the outer case 23 and the inner case 24 is slightly variable. . The locking step 24f and the locking hole 23d are formed in a pair so as to correspond to the outer case 23 and the inner case 24. Unexplained reference numeral '23e' of FIG. 4 is an incision groove formed around the engaging hole 23d, and the engaging jaw 24f is easily coupled while the periphery of the engaging hole 23d is elastically deformed by the incision groove 23e. do.

In addition, the spring 26 is composed of a coil spring having a predetermined elastic force, which is disposed in the storage space 25, one end of which is supported by the front surface 23a of the outer case 23 and the other end of the inner case 24. It is supported on the rear face 24a. Therefore, the spring 26 elastically supports the inner case 24 and the outer case 23 in opposite directions, and when the external force is not applied thereto, the position movement of the locking jaw 24f in the locking hole 23d is prevented. To the extent permitted, the entire length of the inner case 24 and the outer case 3 is maintained in an extended state.

Next, the assembling process of the rotor configured as described above will be described with reference to FIGS. 5 to 6.

First, the spring 26 is put into the inner case 24 and pushed into the inside of the outer case 23. Accordingly, the locking step 24f of the inner case 24 is elastically coupled to the long hole type locking hole 23d, whereby the outer case 23 and the inner case 24 are caught in the locking hole 23d. It is assembled so that the jaw 24f can be moved in a range within which it can be moved.

Then, when the rotary shaft 21 is fitted into the hub 24d of the inner case 24 and the vanes 30 are respectively installed in the fitting grooves 22 of the outer case 23, the rotor 20 is assembled. Is complete.

Next, the operation of the vane pump to which the rotor according to the present invention configured as described above is applied and the effects thereof will be described with reference to FIGS. 7 and 8.

First, when power is applied to the drive motor 40, the rotor 20 linked through the rotation shaft 21 rotates eccentrically in one direction in the pumping chamber 11.

And by the eccentric rotation of the rotor 20, the plurality of vanes (30) also frictionally rotates with the pumping chamber (11) wall surface (11a) (11b) and the folding and folding operation is repeatedly made by its own elastic force, thereby the fluid inlet It is sucked into the pumping chamber 11 through 12, and is continuously pumped out through the discharge port 13.

That is, the tapered surface 34 of the vanes 30 continuously rubs against the circumferential wall surface 11a of the pumping chamber 11, while the side surfaces 32 of the vanes 30 are wall surfaces 11b before and after the pumping chamber 11. ) And continuously rotates by elastic deformation. Therefore, the plurality of vanes 30 are unfolded while passing through the inlet 12 and receive the least force, and the closer to the outlet 13, the more folded, the fluid between the vanes 30 receives the greatest force. Discharge to the outside through the.

On the other hand, the edge end of the vanes 30 rubbing with the circumferential wall surface 11a of the pumping chamber 11 is composed of a tapered surface 34 so that sliding friction is easily performed, and the front and rear wall surfaces 11b of the pumping chamber 11 and On both sides 32 of the rubbing vanes 30, bead portions 33 are formed in the longitudinal direction to minimize the contact area. Accordingly, the vanes 30 are elastically deformed, and the sliding friction with the wall 11a and 11b of the pumping chamber 11 is easily performed, and as a result, the rotational force decreases due to friction, thereby minimizing the fluid pumping ability. do.

In addition, if the vane pump is used for a long time, the end portion of the vane 30 is worn out and replacement thereof is required. In this case, as shown in FIG. 3, the rotor 20 is disassembled in the pumping chamber 11 and then continued. To remove the damaged vanes 30 in the longitudinal direction. And if the new vanes are assembled in the reverse order of disassembly, the replacement of the vanes 30 is made easily. At this time, since only the damaged vanes 30 can be selected and replaced, the maintenance thereof is easy and the cost can be reduced.

On the other hand, even if both sides 32 of the vanes 30 are worn to some extent due to friction with the front and rear wall surfaces 11b of the pumping chamber 11, the front and rear surfaces 23a and 24a of the rotor 20 are continuously pumped. (11) They rotate while rubbing against the front and rear wall surfaces 11b.

That is, as shown in FIG. 7, the spring 26 is extended so that the outer case 23 having the front face 23a of the rotor 20 and the inner case 24 having the rear face 24a extend in the longitudinal direction. Since it is elastically supported through, the front and back surfaces 23a and 24a of the rotor 20 are kept in contact with the front and rear wall surfaces 11b of the pumping chamber 11, whereby no self-absorption loss occurs.

In addition, a part of the fluid is stored in the storage space 25 in the rotor 20, and the fluid in the storage space 25 passes through the through holes 23c to the front wall 11b of the pumping chamber 11 and the outer case 23. It is supplied between the front surface 23a and also between the rear wall surface 11b of the pumping chamber 11 and the rear surface 24a of the inner case 24 through the guide holes 24e. As a result, a fluid lubrication phenomenon occurs due to fluid supply between the friction surfaces, thereby minimizing rotational resistance and smoothly rotating the rotor 20.

As described in detail above; According to the vane pump according to the present invention, the rotor is composed of an outer case and an inner case assembled to be able to extend a predetermined width in the front and rear longitudinal direction through the elastic force of the spring. Therefore, even if the front and rear surfaces of the rotor are partially worn out by using the vane pump for a long time, the front and rear surfaces of the rotor are kept in close contact with the front and rear walls of the pumping chamber, thereby improving rotor durability and loss of suction. There is an effect that the pumping capacity is preserved as it is not generated. In addition, a plurality of fitting grooves are formed on the outer circumference of the rotor at regular intervals in the circumferential direction and concave in the longitudinal direction, and one end of the vanes has a coupling protrusion formed in the longitudinal direction to be coupled to the fitting groove. Therefore, when the vane wear damage, maintenance can be made easier as an independent object, and the cost of repair can be significantly reduced.

Claims (5)

A circular pumping chamber 11 is formed therein and is disposed eccentrically in a pump housing 10 having an inlet 12 and an outlet 13 opposed to each other, and a pumping chamber 11 of the pump housing 10. Rotor 20 is rotated by receiving the rotational force of the motor 40, radially arranged at regular intervals on the outer periphery of the rotor 20, and friction with the wall surface (11a) (11b) of the pumping chamber (11) In the vane pump having a plurality of vanes 30 that rotates, The rotor 20 is; An inner case 24 whose front side is open and has a rear side 24a and a generally circular side surface 24b, and a hub 24c in which a rotating shaft 21 is fitted and coupled to the center portion thereof in an axial direction; An outer case 23 having a rear side open to accommodate the inner case 24 and having a front side 23a and a generally circular side surface 23b; A coupling member provided between the side surface 24b of the inner case 24 and the side surface 23b of the outer case 23 to slidably couple the outer case 23 and the inner case 24 to the front and rear in a predetermined width ( 23d) 24f; One end is supported on the front case 23a of the outer case 23 and the other end is supported on the back case 24a of the inner case 24 to elastically support the outer case 23 and the inner case 24 in opposite directions. Including a spring 26; A vane pump, characterized in that the front and rear surfaces of the rotor (20) is in continuous contact with the front and rear wall surfaces (11b) of the pumping chamber (11). The method of claim 1, The coupling members 23d and 24f of the rotor 20 are; A long hole-type locking hole 23d which is bored to extend in the longitudinal direction on the side surface 23b of the outer case 23, The locking jaw 24f is provided to protrude in the side surface 24b of the inner case 24 corresponding to the locking hole 23d, and is coupled to the locking hole 23d so as to be movable forward and backward in a predetermined width. A vane pump, characterized in that. The method of claim 1, When assembling the inner case 24 and the outer case 23, there is formed a storage space 25 in which a part of the fluid is stored, A plurality of front surfaces 23a of the outer case 23 guide the fluid in the storage space 25 between the front surface 23a of the outer case 23 and the front wall surface 11b of the pumping chamber 11. Through hole 23c is drilled, A plurality of side surfaces 24b of the inner case 24 guide the fluid in the storage space 25 between the rear surface 24a of the inner case 24 and the rear wall surface 11b of the pumping chamber 11. Vane pump, characterized in that perforated to penetrate the two guide holes (24e). The method of claim 1, A plurality of fitting grooves 22 are formed on the outer circumference of the outer case 23 at regular intervals in the circumferential direction and concave in the longitudinal direction. The vanes 30 are made of a rectangular rubber plate having a predetermined thickness and length and have elasticity of its own, and one end of the vanes 30 is fitted into the fitting groove 22 so that the coupling protrusion 31 is coupled in the longitudinal direction. A vane pump, characterized in that formed. The method of claim 3, The other end of the vane 30 is made of a tapered surface 34 so that sliding friction with the circumferential wall surface 11a of the pumping chamber 11 is easily performed. The vane pump, characterized in that the bead portion 33 is formed to protrude in the longitudinal direction on both sides 32 of the vane 30 to minimize the friction area with the front and rear wall surface 11b of the pumping chamber 11. .