WO2020097699A1 - Unité hydraulique avec pompes parallèles au cylindre pneumatique relié à un servomoteur et son utilisation - Google Patents

Unité hydraulique avec pompes parallèles au cylindre pneumatique relié à un servomoteur et son utilisation Download PDF

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Publication number
WO2020097699A1
WO2020097699A1 PCT/BR2019/000036 BR2019000036W WO2020097699A1 WO 2020097699 A1 WO2020097699 A1 WO 2020097699A1 BR 2019000036 W BR2019000036 W BR 2019000036W WO 2020097699 A1 WO2020097699 A1 WO 2020097699A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
oil
pneumatic cylinder
pump
unit
Prior art date
Application number
PCT/BR2019/000036
Other languages
English (en)
Portuguese (pt)
Inventor
Ércio Miguel NEMA
Original Assignee
Drausuisse Brasil Comercio E Locacao De Unidades Hidraulicas Inteligentes S.A.
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
Priority claimed from BR102018073550-0A external-priority patent/BR102018073550B1/pt
Application filed by Drausuisse Brasil Comercio E Locacao De Unidades Hidraulicas Inteligentes S.A. filed Critical Drausuisse Brasil Comercio E Locacao De Unidades Hidraulicas Inteligentes S.A.
Publication of WO2020097699A1 publication Critical patent/WO2020097699A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072—Combined pneumatic-hydraulic systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids

Definitions

  • the present invention patent refers to a hydraulic unit, with compact dimensions, for pumping hydraulic oil under pressure, due to the fact that the pumps are positioned parallel to the pneumatic cylinder, whose point to highlight is the use of compressed air combined with the servo motor, capable of acting as a hydraulic pump and pressure accumulator, providing a reduction in the volume of oil in the reservoir, energy savings, reduction and stability of oil temperature, added to the low noise and, therefore, eliminating several problems limiting the conventional hydraulic units.
  • the hydraulic unit is also capable of generating up to four different pressures, one for each hydraulic chamber.
  • the present invention has its field of application aimed at handling hydraulic actuators in the vast majority of machines and equipment that operate with hydraulic oil.
  • These hydraulic units can be equipped with heat exchangers to reduce the high temperature of the oil, in which the temperature rise is often generated by the oil itself, since the oil recirculation is constant to the tank, when the hydraulic actuators are at rest. Even so, the hydraulic units have electric motors that are coupled to the hydraulic hoses, which perform the work of pumping oil from the reservoir. These hydraulic units are generally large and pump oil into the system in a continuous regime, even when the hydraulic actuators are at rest, which results in vibration, noise and oil heating.
  • the electric motors used in the known hydraulic units remain on 100% of the time and when the hydraulic actuators are at rest, the hydraulic pump continues to pump the oil and a safety valve, or a directional valve, directs the oil that it is not being used back to the reservoir, consuming electricity without doing any work.
  • volume of the hydraulic oil reservoir - the increase in the volumetric capacity of the oil reservoirs, of the conventional hydraulic units, is a consequence of all the problems mentioned in the points above, which aims to reduce the oil temperature to try to increase the life seals, which are the most affected parts of the high temperature, which results in leaks and a drop in efficiency in pressure and displaced volume.
  • the aforementioned document works like a piston pump, which consists of a piston with a passing rod on both sides, one of which is attached to the ball screw nut, being limited only to pump the oil.
  • the objective of the present invention is to propose a hydraulic unit with hydraulic pumps parallel to the pneumatic cylinder connected to the ball screw, which operates in conjunction with a servo motor, which makes it more compact and powerful, enabling its application in pumping. of hydraulic oil in machines and equipment that use hydraulic force. Especially those that are located in reduced physical spaces.
  • the objective of the present invention is to propose a hydraulic unit capable of operating with a smaller volume oil reservoir, since the pneumatic cylinder works immersed in this fluid.
  • the expansion of compressed air reduces the temperature of the pneumatic cylinder and dissipates heat from the hydraulic oil.
  • venting which is a continuous recirculation of the oil pumped into the reservoir when the hydraulic actuators are at rest.
  • the objective of the present invention is to propose a hydraulic unit whose two pumps operate with the movable liners on the respective hydraulic rods, thus making it possible to obtain four different pressures.
  • the objective of the present invention is to propose a hydraulic unit capable of eliminating metal-to-metal contact, which is the friction between the moving parts of the pump, responsible for generating noise from the pumping system, be it the Piston pump, Reeds, Gears or Screw.
  • the objective of the present invention is to propose a hydraulic unit capable of eliminating oil leaks, which are caused by the high temperature of the oil, which dries out the seals and generates vibration which, in addition to a poor seal, results in leaks that are conventional systems.
  • the objective of the present invention is to propose a hydraulic unit capable of separating the moving metal parts, which move, using permanent self-lubricating seals and bearings.
  • the objective of the present invention is to propose a hydraulic unit capable of significantly reducing noise in the work environment, providing the user with a more comfortable environment.
  • the claimed hydraulic unit of compact constructiveness, has its operation based on the use of compressed air that drives a pneumatic cylinder, positioned between two pumps in parallel, which is coupled to a ball screw, in turn connected to a servo motor, which performs alternating rotating movements with the purpose of cyclically moving, up and down, two hydraulic jackets, which have two hydraulic chambers, separated by a hydraulic piston with a passing rod fixed in fixed bearings, where who moves they are the hydraulic jackets and not the rods, as it happens in most pumps.
  • the movement of the liners has the function of sucking the fluid from the oil reservoir and pumping it with pressure into hydraulic pressure accumulators that are available for use, when necessary, allowing the displacement of large volumes of oil at once, in order to meet the demand in certain phases of the work cycle of machines and equipment that operate with hydraulic oil.
  • the present invention has the most predominant advantages:
  • FIGURE 1 Sectional view of the hydraulic unit with pumps parallel to the pneumatic cylinder connected to a servo motor
  • FIGURE 2 Enlarged detail of the hydraulic unit's unidirectional valve with cylinders parallel to the pneumatic cylinder connected to a servo motor.
  • THE HYDRAULIC UNIT WITH PARALLEL PUMPS TO THE PNEUMATIC CYLINDER CONNECTED TO SERVO MOTOR refers to a multifunctional hydraulic unit (U), composed of two hydraulic pumps (1 and 2) positioned in parallel, interspersed by a pneumatic cylinder (3) , whose rod is coupled to a ball screw (4) connected to a servo motor (5), so that the compressed air and said servo motor (5) add forces to move up and down two liners (6X and 6D) hydraulic, assembled in parallel and interconnected in solidarity with each other, by means of a piece that has the rod (7) of the pneumatic cylinder (3) attached to it, and such hydraulic jackets (6E and 6D) move vertically over the rods (8E, 8E 'and 8D, 8D'), fixed, with two pistons at a pace suitable for pumping, according to the direction of rotation of the servo motor (5).
  • U multifunctional hydraulic unit
  • the rods (8E, 8E 'and 8D, 8D') of the pistons of the hydraulic pumps (1 and 2) are fixed on a roller bearing (9S) and base (91) and have a hydraulic piston (10E and 10D) that separates a chamber upper hydraulic (11E and 11D) and a lower hydraulic chamber (12E and 12D) of the hydraulic liners (6E and 6D), with a threaded hole at each end of the piston rods (8X, 8E 'and 8D, 8D') (13 and 13 'and 14 and 14') for the passage of oil coming from the upper hydraulic chambers (11E and 11D), from the lower hydraulic chambers (12E, and 12D), and through a one-way valve (VI and V2) lower, left and right hydraulic check valve for oil outlet, which directs the pressurized oil to a hydraulic pressure accumulator (15E and 15D), and a second one-way valve (V3 and V4) top, left and right hydraulic check valve, receive the oil sucked from the reservoir (16), and at the outlet of each
  • the claimed hydraulic unit (U) comprises two hydraulic pumps (1 and 2) working in parallel, having between them, in a central position, a pneumatic cylinder (3), which works submerged in the reservoir (16) oil, where the pumping is done by displacing the hydraulic jackets (6E and 6D) of the hydraulic pumps (1 and 2), which slide over the rods (8E, 8E 'and 8D, 8D') of the hydraulic pistons, which they are static and fixed on a rolling bearing (9S) and base (91), properly supported, where the oil is sucked from the oil reservoir (16) as a result of the movement of the hydraulic liners (6E and 6D), either up or down , and at the same time that the oil is sucked, it pushes a certain volume into a hydraulic pressure accumulator (15E or 15D).
  • a pneumatic cylinder (3) which works submerged in the reservoir (16) oil
  • the pumping is done by displacing the hydraulic jackets (6E and 6D) of the hydraulic pumps (1 and 2), which slide over the rods (8E
  • the pumping movement starts with the energization of the equipment and the release of compressed air to feed the pneumatic cylinder (3) of the hydraulic unit (U).
  • the pressure switch (18) automatically controls the start of the servo motor (5) that is fixed on the bearing (9S) and rotates the ball screw (4) that moves the hydraulic jackets (6E and 6D) of the hydraulic pumps (1 and 2), which are interconnected and solidary between itself, by means of a part (19) which has the ball screw nut (4) on the upper side and the rod (7) of the pneumatic cylinder (3) on the other side.
  • the pressure switch (18) When the hydraulic pressure gauge (26) registers the maximum pressure programmed in the system, the pressure switch (18) will be activated and will de-energize the pneumatic directional valve (V5) and also the servo motor (5) and, thus, the hydraulic pumps (1 and 2) will remain at rest, but keeping the system pressurized, eliminating the circulation of oil so that it does not heat up.
  • the "HYDRAULIC UNIT WITH PUMPS PARALLEL TO THE PNEUMATIC CYLINDER CONNECTED TO SERVO MOTOR”, is electronically intelligent and will be monitoring the activities of the machine that is using this invention, and when one of its hydraulic actuators starts to move, there will be the use of a certain volume of oil, which will come out of the hydraulic pressure accumulators (15E and 15D) and consequently a hydraulic pressure drop, which will be registered by the hydraulic manometer (26) and will activate the pressure switch (18), which will command the continuity of the operation of the servo motor (5), which will revolve in the same direction as it was previously and will change the position of the pneumatic directional valve (V5) to the same previous position, thus continuing the pumping process, which will be interrupted every time the actuators reach the end of the stroke, resulting in a reduction in the volume of oil used, as well as a reduction in the consumption of electricity and the hydraulic oil temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)

Abstract

La présente invention concerne une unité hydraulique (U) multifonctionnelle et compacte, constituée par deux pompes (1 et 2) hydrauliques positionnées en parallèle, entre lesquelles se trouve un cylindre pneumatique (3), dont la tige est accouplée à une vis à billes (4) reliée à un servomoteur (5), de sorte que l'air comprimé et ledit servomoteur (5) cooopèrent pour déplacer, vers le haut et vers le bas, deux manchons (6E et 6D) hydrauliques, montés en parallèle et interconnectés de manière solidaire entre eux, au moyen d'une pièce sur laquelle est fixée la pointe du cylindre pneumatique (7), lesdits manchons (6E et 6D) hydrauliques se déplaçant verticalement sur les tiges (8E, 8E' et 8D, 8D'), fixes, de deux pistons avec un rythme approprié au pompage, conformément au sens de rotation du servomoteur (5). Étant donné que le cylindre pneumatique (3) fonctionne immergé dans le réservoir (16) d'huile hydraulique, l'huile hydraulique (U) ne requiert pas d'échangeurs de chaleur, la réfrigération se produisant lorsque l'expansion de l'air dans le cylindre pneumatique (3) intervient à faible température. L'accumulateur de pression hydraulique (15E et 15D) reçoit l'huile provenant des tiges (8E, 8E' et 8D, 8D') des pistons des pompes (1 et 2) hydrauliques, des manchons mobiles (6E et 6D) respectifs, des pistons (10E et 10D) hydrauliques, des chambres hydrauliques (11E, 12E, 11D et 12D) par l'intermédiaire des valves unidirectionnelles (V1 et V2) de rétention hydraulique inférieure, gauche et droite, ainsi que des valves unidirectionnelles (V3 et V4) de rétention hydraulique supérieure, gauche et droite, qui aspirent l'huile du réservoir (16). Lors du remplissage de tous les points requérant de l'huile, ou lorsque les actionneurs sont statiques, le système de pompage est automatiquement arrêté et son fonctionnement en tant qu'accumulateur de pression hydraulique (15E et 15D) est maintenu, le pompage recommençant lorsque de l'huile est à nouveau utilisée du fait d'un mouvement quelconque.
PCT/BR2019/000036 2018-11-14 2019-10-29 Unité hydraulique avec pompes parallèles au cylindre pneumatique relié à un servomoteur et son utilisation WO2020097699A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102018073550-0A BR102018073550B1 (pt) 2018-11-14 Unidade hidráulica com bombas paralelas ao cilindro pneumático ligado a servo motor e seu uso
BR1020180735500 2018-11-14

Publications (1)

Publication Number Publication Date
WO2020097699A1 true WO2020097699A1 (fr) 2020-05-22

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4765225A (en) * 1986-08-22 1988-08-23 Birchard William G Digitally controlled air-over-hydraulic actuator and method
US5261810A (en) * 1992-09-16 1993-11-16 Captive Plastics, Inc. Closing and clamping system
US20050091972A1 (en) * 2003-10-31 2005-05-05 Redman Kenneth K. Electrohydraulic actuator
CN2777258Y (zh) * 2005-02-02 2006-05-03 苏州大学 一种双向双级气液传动增压装置
WO2009026893A1 (fr) * 2007-08-24 2009-03-05 Christian Wieber Système d'entraînement pour presses hydrauliques
EP2466171A1 (fr) * 2010-12-20 2012-06-20 ZF Friedrichshafen AG Dispositif destiné à l'actionnement d'un cylindre de travail, dispositif d'alimentation en huile sous pression de composants d'automatisation d'une boîte de vitesses automatisée et utilisation d'un convertisseur de pression pneumo-hydraulique
CN107575379A (zh) * 2017-10-27 2018-01-12 吉林省云动力智能装备制造有限公司 高效智能可调液压泵及其应用的泵站系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4765225A (en) * 1986-08-22 1988-08-23 Birchard William G Digitally controlled air-over-hydraulic actuator and method
US5261810A (en) * 1992-09-16 1993-11-16 Captive Plastics, Inc. Closing and clamping system
US20050091972A1 (en) * 2003-10-31 2005-05-05 Redman Kenneth K. Electrohydraulic actuator
CN2777258Y (zh) * 2005-02-02 2006-05-03 苏州大学 一种双向双级气液传动增压装置
WO2009026893A1 (fr) * 2007-08-24 2009-03-05 Christian Wieber Système d'entraînement pour presses hydrauliques
EP2466171A1 (fr) * 2010-12-20 2012-06-20 ZF Friedrichshafen AG Dispositif destiné à l'actionnement d'un cylindre de travail, dispositif d'alimentation en huile sous pression de composants d'automatisation d'une boîte de vitesses automatisée et utilisation d'un convertisseur de pression pneumo-hydraulique
CN107575379A (zh) * 2017-10-27 2018-01-12 吉林省云动力智能装备制造有限公司 高效智能可调液压泵及其应用的泵站系统

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