KR20120082291A - Volumetric rotary pump which depressed a pressure of a chamber interior - Google Patents

Volumetric rotary pump which depressed a pressure of a chamber interior Download PDF

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Publication number
KR20120082291A
KR20120082291A KR1020110003702A KR20110003702A KR20120082291A KR 20120082291 A KR20120082291 A KR 20120082291A KR 1020110003702 A KR1020110003702 A KR 1020110003702A KR 20110003702 A KR20110003702 A KR 20110003702A KR 20120082291 A KR20120082291 A KR 20120082291A
Authority
KR
South Korea
Prior art keywords
pressure
sealing means
chamber
pump
case
Prior art date
Application number
KR1020110003702A
Other languages
Korean (ko)
Inventor
노성왕
Original Assignee
제이엠모터스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 제이엠모터스 주식회사 filed Critical 제이엠모터스 주식회사
Priority to KR1020110003702A priority Critical patent/KR20120082291A/en
Publication of KR20120082291A publication Critical patent/KR20120082291A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/005—Axial sealings for working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/22—Fluid gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

PURPOSE: A volumetric rotary pump decreasing a pressure of an inner chamber is provided to prevent the damage of a sealing member and decompress the inner space of a chamber for the usage of cheap sealing members. CONSTITUTION: A volumetric rotary pump decreasing a pressure of an inner chamber comprises a case(100), a rotor unit(200), a sleeve, a wearing plate(400), a sealing unit(500), and a n excess member(600). The rotor unit transferring fluid through volume changing is installed in the case. The sleeve is installed in the wearing plate by being inserted. A sealing unit is installed in a chamber to prevent water leakage. The excess member formed between a chamber and an inlet hole prevents the damage of the sealing unit.

Description

Volumetric rotary pump which depressed a pressure of a chamber interior}

The present invention relates to a rotary displacement pump that reduces the pressure in the chamber, and more particularly, to form a groove between the chamber in which the sealing means under pressure of the pump is installed and the suction part to reduce the pressure delivered to the sealing means. It relates to a rotary displacement pump to reduce the pressure in the chamber to prevent damage of the sealing means.

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. In addition, the displacement pump is substantially constant regardless of the load pressure, and there are a piston pump, a plunger pump, a gear pump, a screw pump, a vane pump, and the like.

The volumetric pump pumps a liquid into a cylinder for a reciprocating linear motion such as a piston, a flanger, or a bucket in a cylinder having a constant volume equipped with a suction valve and a discharge valve, thereby sucking liquid and changing the volume of the pump. It is a pump that supplies and delivers constant pressure energy to a liquid by applying required pressure.

The rotary displacement pump mainly rotates a special type of rotor in a casing, and gear pumps, vane pumps and screw pumps are mainly used. The gear pump sends the liquid between the tooth and the casing wall from the suction pipe to the discharge pipe as the gears engage and rotate in the container. The oil is usually used and the flow rate is low, but the pressure can be obtained up to 25 ~ 30MPa.The vane pump has a movable blade in radial direction as the rotor rotates, so the pressure is obtained up to 40MPa in the same way as the gear pump and the screw The pump is operated by engaging and rotating two or three screw rods. Mainly for oil, the pressure is within 20MPa.

In such a conventional rotary displacement pump, there is a lobe pump for extruding liquid on the same principle as the gear pump. This can be seen as a small gear pump gear, and the structure is driven by a separate gear on the outside because the set of rotors can not rotate the other side.

The conventional rotary displacement pump can obtain a large lift coefficient and function as a pump even at low speeds, but the flow rate is low, and there are disadvantages such as a decrease in efficiency at low speed rotation and noise and wear of gears at high pressure and high speed rotation. have.

In order to solve such a conventional problem, the Republic of Korea Patent Registration No. 552597 has been proposed a rotary displacement pump, but the applicant's pre-registered rotary displacement pump has a suction port and a discharge port as shown in Figs. In the case 100 provided therein, a rotor part 200 for transferring fluid due to a change in volume due to rotation of the rotors 200a and 200b is installed, and a rotating shaft integrally formed with the rotors 200a and 200b. The sleeve 300 is fitted into the shaft hole of the wear plate 400, the chamber 110 formed in the case 100, the sealing means 500 is installed on the rotating shaft of the rotor (200a, 200b) is leaked It is installed to prevent.

The conventional rotary displacement pump does not apply the oil seal, which is a sealing means applicable below, in the case of the sealing means 500, when the pump requires a performance between 1.3 to 2.0 MPa, so that the mechanical seal has several tens of economic differences. Or an expensive multiple sealing means constructed using a plurality of sealing means was used to install.

However, in the conventional rotary displacement pump, the sealing means 500 is easily broken by the perturbation of the rotating shafts of the sealing means 500 and the rotors 200a and 200b, that is, friction, and the perturbation surface to prevent the sealing means 500 from being damaged. The surface treatment or mounting of a sleeve with a very high hardness is accompanied by an increase in the number of parts or an economical expensive surface treatment, which is accompanied by a decrease in productivity. In addition, the surface treatment of the perturbation surface in order to prevent the damage of the sealing means 500, a large problem occurs that the rotating shaft of the rotor (200a, 200b) is worn.

In order to solve the above conventional problems, the present invention generates a high-pressure fluid generated in the discharge portion in the chamber by a change in volume generated by the rotation of the rotor, the generated high-pressure fluid is a chamber in which the sealing means is installed Rotation in which the pressure transmitted to the sealing means is reduced by the groove formed between the suction hole and the suction port to prevent breakage of the sealing means, and the pressure inside the chamber is reduced to enable the use of the low-cost sealing means due to the drop in pressure. It is to provide a volumetric pump.

In the present invention, the rotor part 200 for transferring a fluid due to a change in volume by the rotation of the rotors 200a and 200b is installed in the case 100 having the suction port and the discharge port, and the rotor 200a. The sleeve 300 is inserted into the shaft hole of the wear plate 400 on the rotation shaft formed integrally with the 200b, and the chamber 110 formed on the case 100 is installed on the rotation shaft of the rotors 200a and 200b. In the rotary displacement pump formed by the sealing means 500 to prevent leakage, by forming a groove between the suction port and the chamber in which the sealing means under pressure of the pump is installed to reduce the pressure transmitted to the sealing means It is achieved by a rotary displacement pump to reduce the pressure in the chamber, characterized in that to prevent the breakage of the sealing means.

In the present invention as described above, the high-pressure fluid generated in the discharge portion is generated in the chamber by the change of the volume generated by the rotation of the rotor, and the generated high-pressure fluid is formed between the chamber and the suction port where the sealing means is installed. By reducing the pressure transmitted to the sealing means by the bar to prevent the breakage of the sealing means, it is a useful invention having the effect of being able to use a low-cost sealing means due to the drop in pressure.

1 is an exploded perspective view showing the structure of a typical rotary displacement pump.
Figure 2 is a side cross-sectional view showing the installation structure of the sealing means in the general rotary displacement pump.
Figure 3 is a perspective view showing the structure of the case to which the technique of the present invention is applied.
4 is an enlarged view of a portion “A” of FIG. 3.
Figure 5 is a graph showing a comparison between the pressure received by the sealing means installed in the rotational displacement pump of the present invention formed with a conventional rotational displacement pump and a glove.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view showing a structure of a case to which the technique of the present invention is applied, and according to this, the rotary displacement pump according to the present invention is adapted to rotate the rotors 200a and 200b inside the case 100 provided with the inlet and outlet. The rotor unit 200 for transferring the fluid due to the change in volume is installed, the sleeve 300 is fitted into the shaft hole of the wear plate 400 in the rotary shaft formed integrally with the rotor (200a, 200b), The chamber 110 formed in the case 100 has a structure in which a sealing means 500 arranged on a rotation shaft of the rotors 200a and 200b is installed to prevent leakage, as shown in FIG. 4. A fine groove 600 is formed at a predetermined depth between the chamber 110 and the suction port where the sealing means 500 under pressure of the rotary displacement pump is installed to seal the pressure to be delivered to the sealing means 500. Breakage of the means Underground is that characterized by.

Referring to the operation and effect of the present invention made as described above, when the fluid is sucked through the suction port by the rotation of the rotor (200a, 200b) forming the rotor 200, the fluid introduced into the case is the rotor (200a) (200b) Compression by the rotation of) causes an instant explosion to transfer the fluid at high pressure through the discharge port.

At this time, the high-pressure fluid generated in the discharge portion is generated in the chamber 110 by a change in the volume of the chamber 110 provided in the case 100 generated by the rotation of the rotors 200a and 200b. The generated high pressure fluid has a vacuum pressure formed under the friction plate 400.

When the fluid is discharged as described above, because the rotary shafts of the rotors 200a and 200b are rotated at high speed, lubricating oil may leak, but this is prevented by the sealing means 500.

Looking at the action of the sealing means 500, the high pressure generated by the rotation of the rotor (200a, 200b) is leaked between the wear plate 400 and the rotating shaft to press the sealing means 500 and the wear plate 400 is made of metal ) Is not deformed, but the sealing means 500 which is a rubber material is deformed by compression.

Decompression in the chamber during compression deformation of the sealing means 500 is prevented by the wear plate 400.

At this time, since the high pressure transmitted to the sealing means 500 is discharged toward the suction port as shown in FIG. 4, the pressure is temporarily released in the chamber 110 in which the sealing means 500 is installed.

In the conventional rotary displacement pump in which the groove 600 is not formed between the chamber 110 and the suction port, when the pressure of the portion in which the sealing means 500 is installed is measured as shown in FIG. Although pressure is formed at ± 0.2 MPa, it can be seen that the pressure is formed at 1.2 ± 0.12 MPa for the rotary displacement pump to which the technique of the present invention is applied. Therefore, in consideration of the safety factor, it is possible to use a sealing means 500, that is, a low-cost sealing means that can be used up to 1.5MPa.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

100: case 110: chamber
200: rotor part 200a, 200b: rotor
300: sleeve 400: wear plate
500: sealing means 600: groove

Claims (1)

In the case 100 having a suction port and a discharge port, a rotor part 200 for transferring a fluid due to a change in volume due to rotation of the rotors 200a and 200b is installed, and the rotors 200a and 200b are provided. The sleeve 300 is integrally formed on the rotation shaft formed in the shaft hole of the wear plate 400, and the chamber 110 formed in the case 100 is sealed on the rotation shaft of the rotors 200a and 200b. In the rotary displacement pump, which is installed to prevent leakage,
Forming a groove 600 between the chamber 110 and the suction port in which the sealing means under pressure of the pump is installed to reduce the pressure transmitted to the sealing means 500 to prevent breakage of the sealing means 500. A rotary displacement pump characterized by reducing the pressure in the chamber.
KR1020110003702A 2011-01-13 2011-01-13 Volumetric rotary pump which depressed a pressure of a chamber interior KR20120082291A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110003702A KR20120082291A (en) 2011-01-13 2011-01-13 Volumetric rotary pump which depressed a pressure of a chamber interior

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110003702A KR20120082291A (en) 2011-01-13 2011-01-13 Volumetric rotary pump which depressed a pressure of a chamber interior

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KR20120082291A true KR20120082291A (en) 2012-07-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102124541B1 (en) 2019-01-14 2020-06-18 주식회사 덕양에코 A rotary displacement pump for obtaining a watertightness increasing effect
KR102145566B1 (en) 2019-10-25 2020-08-18 주식회사 덕양에코 Positive displacement pump for recirculating leaking fluids and increasing watertight effect

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102124541B1 (en) 2019-01-14 2020-06-18 주식회사 덕양에코 A rotary displacement pump for obtaining a watertightness increasing effect
KR102145566B1 (en) 2019-10-25 2020-08-18 주식회사 덕양에코 Positive displacement pump for recirculating leaking fluids and increasing watertight effect

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