KR20240069873A - Rotor for Vane Pump and Vane Pump using the same - Google Patents

Abstract

The present invention relates to a rotor for a vane pump and a vane pump using the same, comprising: a housing formed in the shape of a hollow cylinder with an empty center; A cylinder formed in the shape of a hollow cylinder with an empty center and rotatably supported inside the housing by a bearing; a cylindrical rotor installed inside the cylinder and rotating in an eccentric state from the central axis of the cylinder; a vane removably inserted into the vane insertion groove of the rotor; and a side plate formed with an inlet and an exhaust port and coupled to both sides of the housing, wherein the rotor has a cylindrical shape, has a vane insertion groove formed along the radial direction, and the left side is divided based on the vane insertion groove. A body having a plurality of bearing insertion holes penetrating the upper and lower surfaces so as to communicate with the vane insertion groove at the upper and right portions, respectively; It is formed to have a diameter smaller than the diameter of the body and protrudes from the center of the upper surface of the body to the upper surface of the body in a state of being formed as one piece with the body, and a first fitting groove is formed in the central portion to expose the upper surface of the body. joining part; It is formed to have a diameter smaller than the diameter of the body and protrudes from the center of the lower surface of the body to the lower surface of the body in a state of being formed as one piece with the body, and a second fitting groove is formed in the central portion to expose the lower surface of the body. joining part; a first rotating shaft coupled to the upper surface coupling portion with one side coupled to the first fitting groove; a second rotating shaft coupled to the lower coupling portion with one side coupled to the second fitting groove; and a cylindrical vane bearing inserted into the bearing insertion hole.

Description

Rotor for vane pump and vane pump using the same {Rotor for Vane Pump and Vane Pump using the same}

The present invention relates to a rotor for a vane pump and a vane pump using the same. In particular, it relates to a rotor for a vane pump that has improved durability and continuous use by preventing vanes and rotors from seizing, and to a vane pump using the same.

Machine tools such as milling machines, lathes, drills, etc. require compressed air to remove scrap generated after product processing or to clean the machine tools. Air compressors are used in machine tools to provide such compressed air to the machine tools.

Generally, in machine tool systems, compressed air produced by a large-capacity air compressor is stored in one compressed air tank, or compressed air is produced by multiple air compressors and stored in one compressed air tank, and is stored in one compressed air tank with multiple machine tools. Pipes are installed between each compressed air tank to receive compressed air.

Accordingly, pipes are installed between one compressed air tank and a plurality of machine tools, and multiple valves to reduce leakage must be installed for each pipe, resulting in high installation costs and failure or maintenance of the air compressor. There is a problem of reduced productivity because all machine tools connected to the compressed air tank must be stopped.

Korean Patent No. 10-0597864

Therefore, the present invention is intended to solve the above-mentioned problems, and the rotor for a vane pump that can reduce installation costs by being installed on each machine tool and enables improved durability and continuous use by preventing the vane and rotor from seizing, and a rotor using the same The purpose is to provide a vane pump.

In order to achieve the above object, the rotor of the present invention has a cylindrical shape, and a vane insertion groove is formed along the radial direction, and the vane insertion groove is formed in the left and right parts divided based on the vane insertion groove. A body having a plurality of bearing insertion holes penetrating the upper and lower surfaces to communicate with each other; It is formed to have a diameter smaller than the diameter of the body and protrudes from the center of the upper surface of the body to the upper surface of the body in a state of being formed as one piece with the body, and a first fitting groove is formed in the central portion to expose the upper surface of the body. joining part; It is formed to have a diameter smaller than the diameter of the body and protrudes from the center of the lower surface of the body to the lower surface of the body in a state of being formed as one piece with the body, and a second fitting groove is formed in the central portion to expose the lower surface of the body. joining part; a first rotation shaft coupled to the upper surface coupling portion with one side coupled to the first fitting groove; a second rotating shaft coupled to the lower engaging portion with one side coupled to the second fitting groove; and a cylindrical vane bearing inserted into the bearing insertion hole.

According to the present invention, each of the first and second rotation shafts includes a shaft formed in the shape of a cylindrical column; A plurality of insertion holes are formed at the lower part of the shaft to have the same diameter as the diameter of the upper coupling part or the lower coupling part, and between the center and the edge, a plurality of insertion holes are inserted into which coupling means for coupling the upper coupling part and the lower coupling part are inserted. Formed fastening portion; and a fitting protrusion formed to have the same diameter as the diameter of the shaft and protruding from a lower portion of the fastening portion to fit into the fitting groove.

According to the present invention, a rubber coating layer is formed on the outer surface of the body.

According to the present invention, the bearing insertion holes are formed in pairs on the left and right sides of the body divided by the vane insertion groove, where one pair is arranged to face each other in the central part of the body, and the other pair is located on the body. It is characterized by being placed opposite to each other at the edge.

The vane pump of the present invention includes a housing formed in the shape of a hollow cylinder with an empty center; A cylinder formed in the shape of a hollow cylinder with an empty center and rotatably supported inside the housing by a bearing; A rotor configured by at least one of claims 1 to 4, installed inside the cylinder and rotating in an eccentric state from the central axis of the cylinder; a vane removably inserted into the vane insertion groove of the rotor; and a side plate formed with an intake port and an exhaust port and coupled to both sides of the housing.

According to the present invention, the vane includes a first vane piece and a second vane piece, and the first vane piece and the second vane piece are elastic to the first vane piece and the second vane piece at an upper end and a lower end of one side, respectively. An elastic member insertion groove is formed into which the elastic member is inserted to provide a protrusion and a fitting portion are formed between the elastic member insertion grooves, so that the protrusion of the first vane piece is inserted into the fitting portion of the second vane piece and the first vane piece is inserted into the elastic member insertion groove. 2 The protruding part of the vane piece is inserted into the fitting part of the first vane piece and combined into a square plate shape.

According to the present invention, a vane bearing rotating in the lateral direction of the rotor is installed inside the rotor, and only the portion of the vane bearing protruding inside the vane insertion groove is in contact with the outer surface of the vane, so that the space between the outer surface of the vane and the inner surface of the vane insertion groove is maintained. Not only can the durability of the vane pump be improved by preventing sticking due to fusion, but also the vane bearing allows the vane to slide smoothly within the vane insertion groove, allowing the vane pump to be used continuously.

In addition, according to the present invention, since the first and second rotation shafts are manufactured separately from the rotor, not only is easy repair possible in case of rotor failure, but also when the vane slides in the vane insertion groove, the vane bearing is connected to the fitting portion formed on the vane and the vane. Because it is placed between the ends of the , leakage at the interface between the fitting and the protrusion can be prevented.

1 is an exploded perspective view of a vane pump according to an embodiment of the present invention.
Figure 2 is a perspective view of a vane pump according to an embodiment of the present invention.
Figure 3 is a cross-sectional view taken along line AA' shown in Figure 1.
Figure 4 is a cross-sectional view taken along line BB' shown in Figure 1.
Figure 5 is an enlarged view of the rotor shown in Figure 1.
FIG. 6 is an enlarged reverse view of the first rotation axis shown in FIG. 1.
7 is an enlarged view of the second rotation axis shown in FIG. 1.
FIG. 8 is a view showing a state in which the vane shown in FIG. 1 is separated.

Hereinafter, with reference to the attached drawings, preferred embodiments that enable those skilled in the art to easily practice the present invention will be described in detail. However, when explaining in detail the operating principle of a preferred embodiment of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

In addition, the same reference numerals are used for parts that perform similar functions and actions throughout the drawings.

In addition, when a part is said to be "connected" to another part throughout the specification, this includes not only cases where it is directly connected, but also cases where it is indirectly connected through other components in between. In addition, “including” a certain component does not mean excluding other components, unless specifically stated to the contrary, but rather means that other components may be further included.

Figure 1 is an exploded perspective view of a vane pump according to an embodiment of the present invention, Figure 2 is a perspective view of a vane pump according to an embodiment of the present invention, and Figure 3 is a cross-sectional view taken along line A-A' shown in Figure 1. , FIG. 4 is a cross-sectional view taken along line B-B' shown in FIG. 1. In addition, FIG. 5 is an enlarged view of the rotor shown in FIG. 1, FIG. 6 is an enlarged reverse view of the first rotation axis shown in FIG. 1, and FIG. 7 is an enlarged view of the second rotation axis shown in FIG. 1. 8 is a diagram showing the state in which the vanes shown in FIG. 1 are separated.

Referring to Figures 1 to 8, the vane pump according to an embodiment of the present invention has a housing 10 formed in the shape of a hollow cylinder with an empty center, and, like the housing 10, has a hollow cylindrical shape with an empty center. A cylinder 20 formed and rotatably supported inside the housing 10 by a bearing 22, a cylinder installed inside the cylinder 20 and rotated in a state eccentric from the central axis of the cylinder 20 Shaped rotor 30, a first rotation shaft 50 coupled to one side (e.g., upper surface) of the rotor 30, and a second rotating shaft 50 coupled to the other side (e.g., lower surface) of the rotor 30. A side plate 70 on which a rotating shaft 60, an intake port 71 and an exhaust port 72 are formed and coupled to both ends of the housing 10, and a vane formed on the rotor 30 along the radial direction of the rotor 30 are inserted. It is configured to include a vane 40 that is inserted into and out of the groove 32.

Since the housing 10 and the cylinder 20 have a structure supported by a bearing 22 as shown in FIGS. 2 to 4, when the housing 10 is fixed, the cylinder 20 rotates inside the housing 10. And when the cylinder 20 is fixed, the housing 10 rotates outside the cylinder.

The rotor 30 is formed in a cylindrical shape and is installed inside the cylinder 20 to rotate in an eccentric state from the central axis of the cylinder 20.

As shown in FIG. 5, the rotor 30 has a cylindrical body 31 formed with a vane insertion groove 32 into which the vane 40 is inserted in the radial direction of the body 31, and the vane insertion groove 32 ) are formed on the left and right sides of the body 31, which is divided based on A coupling portion 33 coupled to the first and second rotation shafts 50 and 60 is formed on the lower surface, and a cylindrical vane bearing 38 is inserted into the bearing insertion hole 35.

At this time, the bearing insertion holes 35 are formed in the center and the edge of the body 31, and a pair is formed facing each other in the center of the body 31 (i.e., the left and right axle portions of the body 31). (respectively formed in ), the remaining pair is formed at opposite locations at the edges, and the bearing insertion holes 35 are formed to communicate with the vane insertion grooves 32, respectively.

Due to this, when the vane 40 is inserted into the vane insertion groove 32, only the vane bearing 38 protruding inside the vane insertion groove 32 is in contact with the outer surface of the vane 40, and the vane insertion groove 32 ) and the outer surface of the vane 40 are spaced a certain distance apart, so the rotor is fused by fusion of the outer surface of the vane 40 and the inner surface of the rotor 30 (i.e., the inner surface of the vane insertion groove 32). Not only can it prevent the sand burning phenomenon that causes the inner surface of the vane (30) to become rough, but the sliding motion of the vane (40) within the vane insertion groove (32) can be achieved smoothly by the vane bearing (38). There will be.

Meanwhile, the coupling portion 33 is formed integrally with the body 31, but is formed on the upper and lower surfaces of the body 31 to have a smaller diameter than the diameter of the body 31 (i.e., the upper surface of the body 31 has a lower diameter). A coupling portion is formed on the lower surface of the body 31, and a lower coupling portion is formed on the lower surface of the body 31, and the central portion is a fitting groove 34 into which the fitting projections 53 and 63 of the first and second rotation shafts 50 and 60 are inserted. ) is formed (that is, a first fitting groove is formed in the upper coupling part, and a second fitting groove is formed in the lower coupling part), and a first rotation axis 50 and a second rotation axis are formed between the fitting groove 34 and the edge. A plurality of coupling holes 37 are formed into which coupling means (for example, bolts) for coupling with (60) are inserted.

When the rotor 30 is rotated in a state eccentric from the central axis of the cylinder 20, the rotor 30 has a rubber coating layer (i.e., the outer surface of the body 31) on the outer surface to maintain airtightness with the inner surface of the cylinder 20 36) is formed.

The first rotation shaft 50 is for transmitting rotational force from an external power means to the rotor 30. The first shaft 51 is formed in a cylindrical column shape as shown in FIG. 6, and is provided at the lower part of the first shaft 51. 1 A first fastening portion 52 formed to have a diameter larger than the diameter of the shaft 51 (i.e., the same diameter as the diameter of the coupling portion 33), and a diameter smaller than the diameter of the first fastening portion 52 (i.e. , the same diameter as the first shaft 51) and is formed to include a first fitting protrusion 53 protruding from the lower portion of the first fastening portion 52, and the first fastening portion 52 includes a coupling portion. For coupling with (33), a plurality of first insertion holes (54) are formed into which coupling means (for example, bolts) are inserted.

The second rotation shaft 60 is coupled to the other side of the rotor 30 so that the rotor 30 can be rotated by the rotation force provided by the first rotation shaft 50, as shown in FIG. 7, and is formed in the shape of a cylindrical column. 2 Shaft 61, a plurality of plurality of shafts formed at the lower part of the second shaft 61 to have a diameter larger than the diameter of the second shaft 61 (i.e., the same diameter as the diameter of the coupling portion 33) into which the coupling means is inserted. The second insertion hole 64 is formed to have a smaller diameter than the diameter of the second fastening portion 62 and the second fastening portion 62 (i.e., the same diameter as the diameter of the second shaft 61). 2 It is formed to include a second fitting protrusion 63 protruding from the lower part of the fastening part 62.

Here, the first shaft 51 and the first fitting protrusion 53 of the first rotating shaft 50 and the second shaft 61 and the second fitting protrusion 63 of the second rotating shaft 60 all have the same diameter. Although it is preferable that the first shaft 51 and the second shaft 61 have different diameters, the first fitting protrusion 53 and the second fitting protrusion 63 may have different diameters.

The side plate 70 is formed with an intake port 71 and an exhaust port 72, and is coupled to both ends of the housing 10 by coupling means such as bolts.

The cover 80 is intended to protect the side plate 70 from the external environment and is coupled to both ends of the housing 10 with the side plate 70 using a coupling means such as a bolt.

The vane 40 is inserted into the vane insertion groove 32 so that it can be protruded or inserted into the outside of the body 31 while sliding in the vane insertion groove 32.

Since the minimum length (L1) and maximum length (L2) of the vane 40 are different when the vane 40 is rotated as shown in FIG. 4, the vane 40 is divided into two vane pieces 40a as shown in FIG. 8. , 40b), and the overall shape of the first vane piece (40a) and the second vane piece (40b) is a square plate shape, and the first vane piece (40a) and the second vane piece (40b) are An elastic member insertion groove 41 into which an elastic member 44 for providing elasticity to the first vane piece 40a and the second vane piece 40b is inserted is formed at the upper and lower ends of one side, respectively, and the elastic member insertion groove A protrusion 43 and a fitting portion 42 are formed between the (41).

At this time, the protrusion 43 of the first vane piece 40a is inserted into the fitting portion 42 of the second vane piece 40b, and the protrusion 43 of the second vane piece 40b is the first vane piece ( It is inserted into the fitting portion 42 of 40a), and an elastic member 44 is provided between the elastic member insertion groove 41 of the first vane piece 40a and the elastic member insertion groove 41 of the second vane piece 40b. is inserted.

As a result, the first vane piece 40a and the second vane piece 40b remain separated from each other due to the elasticity provided by the elastic member 44, and the first vane piece 40a and the second vane piece 40b remain separated from each other due to the elasticity provided by the elastic member 44. When an external force is applied to the end of the vane piece 40b (i.e., the side opposite to the portion where the elastic member insertion groove 41 is formed), they come into close contact with each other and maintain a square plate shape.

On the other hand, when the vane 40 is projected or inserted outside the body 31 while sliding in the vane insertion groove 32, the fitting portion 42 of the first vane piece 40a and the second vane piece of the vane 40 The fitting portion 42 of (40b) must not deviate from the vane bearing 38 installed at the edge of the rotor 30.

This is because when the fitting portion 42 of the first vane piece 40a and the fitting portion 42 of the second vane piece 40b deviate from the vane bearing 38 installed at the edge of the rotor 30. This is because leakage occurs due to the space between the fitting portion 42 and the coupling portion 33.

In other words, when the vane 40 is slid in the vane insertion groove 32, the position of the vane bearing 38 installed on the edge of the rotor 30 is between L3 and L3' as shown in Figure 8. 1 Since leakage occurs at the interface between the fitting portion 42 and the protruding portion 43 of the vane piece 40a and the second vane piece 40b, the location of the bearing insertion hole 35 into which the vane bearing 38 is inserted is It must be formed on the rotor 30 to be disposed between L3 (or L3') and the end of the vane 40.

As such, the vane pump according to an embodiment of the present invention installs a vane bearing 38 rotating in the lateral direction of the rotor 30 inside the rotor 30, and the vane bearing 38 protrudes into the vane insertion groove 32. ) Since only the portion is in contact with the outer surface of the vane (40), the sticking phenomenon due to fusion between the outer surface of the vane (40) and the inner surface of the vane insertion groove (32) can be prevented, thereby improving the durability of the vane pump. In addition, since the vane bearing 38 allows the vane 40 to smoothly slide within the vane insertion groove 32, the vane pump can be used continuously.

In addition, in the vane pump according to an embodiment of the present invention, the first and second rotation shafts 50 and 60 are manufactured separately from the rotor 30, so not only is easy repair possible when the rotor 30 fails, but also the vane ( When 40) slides in the vane insertion groove 32, the vane bearing 38 is disposed between the fitting portion 42 formed on the vane 40 and the end of the vane 40, so the fitting portion 42 and the protrusion ( Leakage at the interface of 43) can be prevented.

As described above, in the detailed description of the present invention, preferred embodiments of the present invention have been described, but this is an illustrative description of the best embodiment of the present invention and does not limit the present invention. In addition, it goes without saying that anyone with ordinary knowledge in the technical field to which the present invention pertains can make various modifications and imitations without departing from the scope of the technical idea of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the claims described below as well as their equivalents.

10: housing 20: cylinder
22: bearing 30: rotor
31: Body 32: Vane insertion groove
33: Coupling portion 34: Fitting groove
35: Bearing insertion hole 36: Rubber coating layer
37: coupling hole 38: vane bearing
40: Bane 40a, 40b: Bane
41: Elastic member insertion groove 42: Fitting portion
43: protrusion 44: elastic member
50, 60: rotation axis 51, 61: shaft
52, 62: fastening portion 53, 63: insertion protrusion
54, 64: Insertion hole 70: Side plate
71: intake port 72: exhaust port
80: cover

Claims (6)

It has a cylindrical shape, and a vane insertion groove is formed along the radial direction. In the left and right parts divided based on the vane insertion groove, bearing insertion holes penetrate the upper and lower surfaces to communicate with the vane insertion groove, respectively. A plurality of bodies formed;
It is formed to have a diameter smaller than the diameter of the body and protrudes from the center of the upper surface of the body to the upper surface of the body in a state of being formed as one piece with the body, and a first fitting groove is formed in the central portion to expose the upper surface of the body. joining part;
It is formed to have a diameter smaller than the diameter of the body and protrudes from the center of the lower surface of the body to the lower surface of the body in a state of being formed as one piece with the body, and a second fitting groove is formed in the central portion to expose the lower surface of the body. joining part;
a first rotating shaft coupled to the upper surface coupling portion with one side coupled to the first fitting groove;
a second rotating shaft coupled to the lower coupling portion with one side coupled to the second fitting groove; and
A rotor for a vane pump, comprising a cylindrical vane bearing inserted into the bearing insertion hole. In claim 1,
Each of the first and second rotation axes is,
A shaft formed in the shape of a cylindrical column;
A plurality of insertion holes are formed at the lower part of the shaft to have the same diameter as the diameter of the upper coupling part or the lower coupling part, and between the center and the edge, a plurality of insertion holes are inserted into which coupling means for coupling the upper coupling part and the lower coupling part are inserted. Formed fastening portion; and
A rotor for a vane pump, which is formed to have the same diameter as the diameter of the shaft and includes a fitting protrusion protruding from the lower part of the fastening part to fit into the fitting groove. In claim 1,
A rotor for a vane pump, characterized in that a rubber coating layer is formed on the outer surface of the body. In claim 1,
The bearing insertion holes are formed in pairs on the left and right sides of the body divided by the vane insertion groove, with one pair facing each other in the center of the body and the remaining pair facing each other at the edge of the body. A rotor for a vane pump, characterized in that it is placed in a place where it can be used. A housing formed in the shape of a hollow cylinder with an empty center;
A cylinder formed in the shape of a hollow cylinder with an empty center and rotatably supported inside the housing by a bearing;
A rotor configured by at least one of claims 1 to 4, installed inside the cylinder and rotating in an eccentric state from the central axis of the cylinder;
a vane removably inserted into the vane insertion groove of the rotor; and
A vane pump comprising a side plate formed with an inlet and an exhaust port and coupled to both sides of the housing. In claim 5,
The vane includes a first vane piece and a second vane piece, and the first vane piece and the second vane piece are elastic for providing elasticity to the first vane piece and the second vane piece at an upper end and a lower end of one side, respectively. An elastic member insertion groove into which the member is inserted is formed, and a protrusion and a fitting portion are formed between the elastic member insertion grooves, so that the protrusion of the first vane piece is inserted into the insertion portion of the second vane piece, and the protrusion of the second vane piece is formed. A vane pump characterized in that it is inserted into the fitting of the first vane piece and combined into a square plate shape.

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