KR101017409B1 - vane vacuum pump - Google Patents

Abstract

The vane vacuum pump according to the present invention is formed in a position opposite to each other, the main body is provided with a pumping chamber in communication with the inlet and discharge port, the rotary shaft is installed on the main body eccentrically with respect to the pumping chamber, and the rotor installed on the rotary shaft and The rotor may include a plurality of vanes installed to be pulled in and pulled out from each other to be in close contact with the inner circumferential surface of the pumping chamber.

These vane vacuum pumps can be lightweight and reduce noise, improve wear resistance, heat resistance, chemical resistance, and reduce thermal deformation.

Vane vacuum pump, synthetic resin, heat dissipation means, check valve

Description

Vane vacuum pump

The present invention relates to a vane vacuum pump, and more particularly, to a vane vacuum pump capable of lightening, reducing noise, improving abrasion resistance, and improving heat dissipation characteristics.

In general, a pump is driven by a driving means (motor) to transfer a fluid, a non-enclosed pump in which energy is converted in an unsealed state, and a volume type in which energy is converted in an enclosed state. It is distinguished by a pump.

In the case of the non-capacity pump, the discharge pressure decreases as the discharge amount increases, and there are a centrifugal pump, a four-flow pump, an axial pump, etc. according to the mechanism and structure, and the volumetric pump has a discharge amount that is substantially constant regardless of the load pressure. Gear pump, screw pump, vane pump and so on.

The vane pump of the pump is a type of pump that pushes the fluid sucked between the vanes through the inlet to the discharge port, an example is disclosed in US-PS 5 112 199. The disclosed pump has two discharge channels connected with two suction zones.

In addition, Korean Patent Laid-Open Publication No. 2007-005037 discloses a vane pump having a noise reduction rear end plate, and in Utility Model No. 04184031, a vane formed in a rotor is made of a material having a predetermined elasticity to have a viscous fluid. Disclosed is a vane pump which prevents the transfer efficiency from being lowered during transfer.

Published Patent Publication No. 2008-0046126 discloses a vane pump in which the efficiency is improved by forming an incision in at least one side of the front side or the rear side of the vane to make the tip width of the vane narrower than the width of the support end.

In addition, Utility Model Registration No. 0334542 discloses a vane pump for minimizing the friction area, and Patent Registration No. 0417848 discloses a vane pump capable of translating movement through the rotor.

Since the vane pumps configured as described above are made of cast steel, such as a main body, a rotor, a vane, and a casing, a relatively large amount of labor is required according to processing, and thus it is difficult to improve the yield.

In addition, the conventional vane pump as described above is heavy and heavy, relatively high noise generation, and the main body and the vane is relatively abrasion because the airtight is maintained by the metal friction contact. And even if the lubrication is smoothly made between the vane of the vane pump and the main body, the mechanical frictional heat is badly generated, and there is a problem in that the working efficiency and the long time cannot be worked.

The present invention is to solve the problems as described above, and the object of the present invention is to provide a vane vacuum pump that can be reduced in weight, improve the occurrence of noise and wear resistance, and can reduce the manufacturing cost and improve productivity. have.

Another object of the present invention is to provide a vane vacuum pump which can improve the cooling efficiency of the main body and improve the pumping efficiency by improving the operating force of the check valves installed on the suction side and the discharge side.

Vane vacuum pump of the present invention to achieve the above object,

A main body having a suction port and a discharge port respectively formed at positions facing each other and a pumping chamber connected thereto; A rotation shaft installed on the main body eccentrically with respect to the pumping chamber, a rotor installed on the rotation shaft, and a plurality of vanes provided to be pulled in and pulled out of the rotor to be in close contact with the inner circumferential surface of the pumping chamber, wherein the main body and the rotor and At least one of the vanes is characterized in that made of a synthetic resin material.

In the present invention, a check valve is provided at each of the suction port and the discharge port. The check valve includes a valve casing having a valve seat having a through hole, a valve member installed inside the valve casing to open and close the through hole, And an elastic member installed between the stopper and the valve member installed in the valve casing to elastically bias the valve member to the valve seat side.

The synthetic resin may be made of engineering plastic, and further includes heat dissipation means for dissipating heat from the body, wherein the heat dissipation means includes a plurality of heat dissipation fans installed on an outer circumferential surface of the main body, and one side of a rotating shaft protruding from the main body. An end is provided with a blowing fan for blowing air to the heat dissipation side.

 A sleeve is inserted into the pumping chamber formed in the main body, and an inner surface of the sleeve further includes a coating layer for improving wear resistance, and the coating layer may be made of tin (TIN), titanium, or titanium aluminum alloy.

In the vane vacuum pump according to the present invention, at least one of the main body, the rotor, and the vane is made of a synthetic resin material, and a sleeve is inserted into the pumping chamber to improve abrasion resistance, and a coating layer is formed inside the sleeve. The weight can be reduced and noise can be reduced. In particular, since it has a heat dissipation means can improve the cooling efficiency, can reduce the number of work due to the processing can improve the productivity.

The vane vacuum pump according to the present invention can improve the weight reduction, noise reduction and abrasion resistance, one embodiment of which is shown in FIGS. 1 and 2.

Referring to the drawings, the vane vacuum pump 10 includes a main body 20 having a pumping chamber 21, an inlet 22, and a discharge port 23 therein, and a pumping chamber 21 installed inside the main body. It is supported and rotated by the sleeve 80 for partitioning the rotary shaft 30 is installed eccentrically in the pumping chamber 21 partitioned by the sleeve 80 installed in the main body 20, a plurality of outer peripheral surface The rotor 40 is provided with two vanes 41. At least one of the main body 20, the rotor 40, the vanes 41, and the sleeve 80 is made of an engineering plastic that is a synthetic resin. Here, the engineering plastic is any one crystalline polymer resin selected from polyamide, polyethylene terephthalate (PET), and polybutylene terephthalate (PBT).

Polyamide (PA; Polyamide) is not only excellent in mechanical performance, but also excellent in heat resistance, and has a high reinforcing effect by glass fibers, which is advantageous for making a highly rigid flange. Nylon 6, nylon 66, polyphthalamide (PPA) and the like can be used as the polyamide.

Said polyphthalamide is a crystalline resin called aromatic nylon, and since it has an aromatic structure in a molecular backbone, it is excellent in high strength, high rigidity, high heat resistance, low water absorption, dimensional stability, etc. Such polyphthalamides have very excellent properties such as melting point 310 ° C., load distortion temperature 285 ° C. (18.6 kg / cm 2), glass transition point 127 ° C., continuous use temperature (5000 hours) 185 ° C., and bending of the base resin. Excellent modulus of elasticity and flexural fatigue. Therefore, the sleeve 80 and the vanes 41 are preferably made of polyamide. In particular, the use of flame-retardant type aromatic nylon resin containing no halogen in polyphthalamide (US DuPont (TM) Zytel (R) HTN) or glass fiber-reinforced polyphthalamide in which glass fiber is mixed in a proportion in polyphthalamide desirable.

The polyethylene terephthalate (PET) is a crystalline thermoplastic resin and has excellent heat resistance, chemical resistance, electrical properties, and weather resistance. Such polyethylene terephthalate has strength and rigidity and is excellent in fatigue strength and solvent resistance. In particular, GF-PET reinforced with polyethylene terephthalate glass fiber has a relatively low cost, low processing cost, and high strength per weight. Various designs are possible without corrosion. The polybutylene terephthalate (PBT) is a crystalline thermoplastic resin having excellent physical properties and good moldability, and has high mechanical strength and excellent durability, and particularly, a reinforcing effect by glass fibers.

In addition, the rotation shaft 30 and the main body 20 have heat dissipation means 50 for dissipating heat generated during driving, and check valves 60 and 70 respectively installed at the suction port 22 and the discharge port 23. It is further provided.

The vane vacuum pump 10 according to the present invention configured as described above will be described in more detail by component.

As described above, the main body 20 includes a sealed pumping chamber 21 into which the rotor 40 is inserted, a suction port 22, and a discharge port 23, and rotating shafts 30 on both sides of the main body 20. The front cover 26 and the rear cover 27 having the bearing parts 24 and 25 respectively supporting the joints are coupled thereto. The bearing parts 24 and 25 formed in the front cover 26 and the rear cover 27 pump the rotary shaft 30 so as to support the rotor 40 eccentrically with respect to the center of the pumping chamber 21. It is comprised so that it may support eccentricly with respect to the thread 21.

The suction port 22 and the discharge port 23 formed in the main body 20 are formed to communicate with the pumping chamber 21. That is, the main body 20 is the pumping chamber 21 is the suction port 22 and the discharge port 23 so that the fluid sucked through the suction port 23 can be discharged to the discharge port 23 through the pumping chamber 21. It is formed in communication with). Although the suction port 22 and the discharge port 23 formed in the main body 20 are illustrated as being formed in the same direction in this embodiment, the present invention is not limited thereto and the position may be changed as necessary.

In addition, a coating layer may be formed on the inner surface of the sleeve 80 partitioning the pumping chamber 21 of the main body 20 to improve wear resistance. The coating layer may be tin (TIN), chromium, titanium and titanium alloy. It may be made of one selected from titanium and aluminum alloy. Lubricating oil grooves 28 and 28 may be formed in the front cover 26 and the rear cover 27 to supply lubricant oil from the inner side to the bearing parts 24 and 25, respectively. As described above, the rotor 40 is made of an engineered plastic, and a vane support part in which a rotation shaft support part 42 on which the rotation shaft 30 is supported is formed and is radially formed so that the vanes 41 are slidably installed. 43 are formed. Although not shown in the drawings, the vane support portions 43 are provided with elastic means for elastically biasing the vanes 41 supported therein in the radial direction. In addition, the rotor 40 may be provided with weight gain holes 44 around the rotation shaft support 42 to reduce weight.

The check valves 60 and 70 installed at the suction port 22 and the discharge port 23 of the main body are made to open and close in a direction opposite to the direction of the valve member that is elastically supported by the spring, but the substantial structure has the same configuration.

That is, as shown in FIGS. 2 to 4, the check valves 60 and 70 may include valve casings 63 and 73 provided with valve seats 62 and 72 having through holes 61 and 71 formed therein. And valve members 64 and 74 which are installed inside the valve casings 63 and 73 to open and close the through holes 61 and 71. The valve casings 63 and 73 are provided with stoppers 65 and 75 provided therebetween, and are provided between the stoppers 65 and 75 and the valve members 64 and 74 to provide the valve members 64. Elastic members 66 and 76 which elastically bias 74 to the valve seats 62 and 72 side. The stoppers 65 and 75 may be fixed by snap rings 67 and 77 installed on the valve casings 63 and 73.

The heat dissipation means 50 is for cooling heat generated by the heat generated from the main body 20 when the vane vacuum pump is driven, and the outer circumferential surface or the front cover 26 and the rear cover 27 of the main body 20. A plurality of heat dissipation fins 51 provided on the outer circumferential surface of the rotary shaft 30 and the rotary shafts 30 protruding from the main body, that is, the ends of the rotary shafts discharged through the bearing 25 of the rear cover 27. Blowing fan 52 for blowing air for cooling to the side). The heat dissipation means is not limited to the above-described embodiment and may be any structure as long as it can dissipate heat generated from the main body during driving.

The vane vacuum pump 10 according to the present invention configured as described above is sucked through the check valve 60 installed in the suction port 22 by rotating the rotation shaft 30 by a separate driving means (not shown). The fluid is discharged through the discharge port 23 and the check valve 70. To this end, a plurality of vanes 41 (five in the present embodiment) are moved in close contact with the inner wall surface of the pumping chamber 21 on the outer circumferential surface of the rotor 40. In this process, since the rotor 40 is eccentrically installed in the pumping chamber 21 partitioned by the sleeve 80, the volume partitioned by the vane 41 from the suction port is widened in contact with each other to generate suction force. The fluid flows through the suction port by this suction force, and the fluid introduced therein is discharged to the discharge port 23 by moving while reducing the volume partitioned toward the discharge port 23 by the vanes continuously transferred.

In this process, heat generated by the friction between the main body 20 and the vanes is transmitted through the heat dissipation fan 51, and the heat transmitted through the heat dissipation fan is blown by the blower fan 52 installed on the rotating shaft 30. It is released by heat exchange with air.

The vane vacuum pump 10 may pump the same capacity as the weight of the vane vacuum pump because at least one of the body 20, the rotor 40, the vanes 41, and the sleeve 80 is made of a synthetic resin material. Compared with the conventional vane pump which can reduce 20 to 30%. In particular, when the vanes 41 and the main body 20 are made of engineering plastics made of synthetic resin, the noise due to driving may be lowered to 60 dB or less since metallic noise does not occur as in the prior art. In addition, the vane vacuum pump can be lowered to 20 to 30 ℃ when driven by the heat dissipation means as described above, since the coating layer for improving the wear resistance is formed on the inner circumferential surface of the pumping chamber, that is, the inner circumferential surface of the sleeve 80 It can reduce the friction between the vanes of the pumping chamber during rotation and further improve the wear resistance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

The vane vacuum pump according to the present invention is widely applicable to various industrial facilities, industrial machines, and the like. In particular, it can be used for pumping highly viscous sludge, oil and the like.

1 is an exploded perspective view of a vane vacuum pump according to the present invention;

2 and 3 are cross-sectional views of the vane vacuum pump,

Figure 4 is an exploded perspective view showing an extract of the check valve installed on the inlet or outlet side of the vane vacuum pump.

Claims (5)

A main body having a pumping chamber connected to a suction port and a discharge port formed at positions facing each other; A rotation shaft installed on the main body eccentrically with respect to the pumping chamber, a rotor installed on the rotation shaft, and a plurality of vanes provided to be pulled in and pulled out of the rotor to be in close contact with the inner circumferential surface of the pumping chamber, wherein the main body and the rotor and At least one of the vanes is made of synthetic resin, A check valve provided at each of the inlet and the outlet, and the check valve includes a valve casing having a valve seat having a through hole, a valve member installed inside the valve casing to open and close the through hole, and the valve casing. It is provided between the stopper and the valve member is installed in the elastic member for elastically biasing the valve member to the valve seat side, The main body is provided with a sleeve for partitioning the pumping chamber, the inner surface of the sleeve is further provided with a coating layer made of tin or titanium and aluminum alloy to improve wear resistance, The synthetic resin is a vane vacuum pump, characterized in that made of any one selected from polyamide, polyethylene terephthalate (PET), polybutylene terephthalate (PBT). delete delete The method of claim 1, And a heat dissipation means for dissipating heat from the main body, wherein the heat dissipation means includes a plurality of heat dissipation fans installed on an outer circumferential surface of the main body, and a blower fan for blowing toward the heat dissipation fan at one end of the rotating shaft protruding from the main body. A vane vacuum pump, characterized in that provided with. delete

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