RO131232A2

RO131232A2 - Energetically-efficient hydraulic unit for oil pumping unit

Info

Publication number: RO131232A2
Application number: ROA201400862A
Authority: RO
Inventors: Daniel Calfa; Constantin Chiriţă; Adrian Constantin Hanganu; Cătălin Gabriel Dumitraş; Vasile Damaschin
Original assignee: Hydramold S.R.L.
Priority date: 2014-11-14
Filing date: 2014-11-14
Publication date: 2016-06-30

Abstract

The invention relates to a hydraulic unit which an oil pumping unit is equipped with, in order to actuate the hydraulic cylinder of the unit. The claimed unit comprises a framework (A) on which a tank (B) containing hydraulic fluid is fixed, a system (C) for heating or cooling the tank (B) being fixed to the framework (A), on a lid of the tank (B) there being a temperature sensor (1), a pilot circuit (2) with accumulators, a hydraulic block (3), a control apparatus (4) and pressure control apparatus (5), an electric motor (6) being mounted to the framework (A), a flange thereof having integrally mounted a flange (7), which is integral with some constant delivery and variable delivery and ratio adjustment pumps (8, 9), respectively, the constant delivery pump (9) being provided with a pilot circuit (10), the pumps (8, 9) being driven by a shaft of the electric motor (6) by means of an resilient coupling, using a common shaft, on the framework (A) there being an electric panel, a hydraulic block (11) being provided with an accumulator (12) for storing the recovered energy, having a control apparatus (13) and some valves (14 and 15) for actuating a hydraulic cylinder (16) of the pumping unit, a transducer (17) mounted on a pipe for collecting the pumped oil, the stroke-end sensors (a and b) and a displacement transducer (c), suitably mounted on the hydraulic cylinder (16) to permit the working beam pace to be regulated by means of a proportional pilot circuit (10), a cooling unit (18) and a filtering system (19) ensuring the hydraulic fluid normal parameters, a proportional throttle (20) permitting the regulation of the descending speed and braking speed, upon the control of the above-mentioned second stroke-end sensor (b).

Description

Invenția se referă la un grup hidraulic, eficient energetic, pentru unitate de pompare țiței, utilizat pentru acționarea cilindrului hidraulic al unității de pompare.The invention relates to a hydraulic group, energy efficient, for the oil pumping unit, used for actuating the hydraulic cylinder of the pumping unit.

Sunt cunoscute grupuri hidraulice pentru unitate de pompare țiței, care cuprind pompă de presiune cu debit variabil, sau pompe duble antrenate de arborele unui motor electric prin intermediul unui cuplaj, prevăzute cu scheme de acționare pentru unul sau mai mulți cilindri hidraulici, cu sau fără sistem de recuperare de energie.Hydraulic groups are known for the oil pumping unit, which include a variable flow pressure pump, or double pumps driven by the shaft of an electric motor through a coupling, provided with actuation schemes for one or more hydraulic cylinders, with or without system. energy recovery.

Dezavantajele acestor construcții sunt legate de consumul energetic ridicat și fiabilității scăzute, datorită echipării cu o singură pompă hidraulică.The disadvantages of these constructions are due to the high energy consumption and the low reliability, due to the equipment with a single hydraulic pump.

Problema tehnică pe care o rezolvă grupul hidraulic, eficient energetic, pentru unitate de pompare țiței, conform invenției, constă în diminuarea consumului energetic prin utilizarea unei pompe cu regulator proporțional și automatizarea ciclului de lucru, prin reglarea secvențială a tactului unității de pompare în funcție de coeficientul de umplere a pompei de adâncime.The technical problem solved by the hydraulic group, energy efficient, for the oil pumping unit, according to the invention, consists in reducing the energy consumption by using a pump with proportional regulator and the automation of the working cycle, by sequentially adjusting the pump unit's tact according to depth pump filling coefficient.

Grupul hidraulic, eficient energetic, pentru unitate de pompare țiței, conform invenției, rezolvă problema de mai sus prin aceea că, are în compunere o pompă cu regulator proporțional, antrenată de un motor electric prin intermediul unui cuplaj elastic, în starea inițială, la pornirea instalației o pompa cu debit fix, antrenată de la motorul electric principal, încarcă circuitul de pilotare iar cilindrul hidraulic nu este alimentat. Pentru acționarea, prin tracțiune, a pistonului cilindrului hidraulic al unitatii de pompare se deschid robineții circuitelor de alimentare iar pompa cu reglaj proporțional introduce în circuit debitul necesar, în funcție de viteza impusă tehnologic. După confirmarea realizării cursei de tracțiune se realizează cursa descendentă a pistonului cilindrului hidraulic, sub acțiunea sarcinii prăjinilor de pompare, cu recuperare de energie prin încărcarea acumulatorului de înaltă presiune. La confirmarea realizării cursei descendente acumulatorul hidraulic eliberează energia acumulată în circuitul de tracțiune iar la atingerea presiunii reglate în sistem pompa cu reglaj proporțional asigură debitul necesar pentru continuarea cursei de tracțiune. Ciclul se repetă, cu sau fără reglarea proporțională a debitului pompei, în funcție de interpretarea semnalului traductorului de debit, montat pe conducta de țiței; evaluarea debitului refulat la cursa deThe hydraulic group, energy efficient, for the oil pumping unit, according to the invention, solves the above problem by having a proportional regulator pump, driven by an electric motor through an elastic coupling, in the initial state, at start-up. a fixed flow pump, driven from the main electric motor, loads the pilot circuit and the hydraulic cylinder is not powered. To actuate, by traction, the piston of the hydraulic cylinder of the pumping unit, the valves of the supply circuits are opened and the pump with proportional adjustment introduces the necessary flow into the circuit, depending on the speed imposed by the technology. After confirming the traction stroke, the descending stroke of the hydraulic cylinder piston is performed, under the action of the pumping rods, with energy recovery by charging the high pressure accumulator. When confirming the descent stroke, the hydraulic accumulator releases the accumulated energy in the traction circuit and when the pressure regulated in the system is reached, the pump with proportional adjustment ensures the flow necessary to continue the traction stroke. The cycle is repeated, with or without the proportional adjustment of the pump flow, depending on the interpretation of the flow transducer signal, mounted on the crude oil pipeline; evaluation of the flow rate applied to the

Q-20U-- 008621 4 -11- 2014Q-20U-- 008621 4 -11- 2014

tracțiune a unității de pompare determină reglarea proporțională a pompei cu debit variabil și implicit cadența de pompare. Schema hidraulică include sistem de control nivel ulei, control grad de colmatare filtre, control temperatură ulei, asigurare și control presiune de pilotare și control încărcare acumulator.traction of the pumping unit determines the proportional adjustment of the pump with variable flow and implicitly the pumping rate. The hydraulic scheme includes oil level control system, filter clogging control, oil temperature control, pilot pressure control and control and battery charge control.

Grupul hidraulic, eficient energetic, pentru unitate de pompare țiței, conform invenției, prezintă avantajul că poate fi utilizat în condiții dificile de lucru, la temperaturi extreme, cu randament energetic ridicat, în special în cazul zăcămintelor cu resurse limitate.The hydraulic group, energy efficient, for the oil pumping unit, according to the invention, has the advantage that it can be used in difficult working conditions, at extreme temperatures, with high energy efficiency, especially in the case of deposits with limited resources.

Se dă în continuare un exemplu de realizare a invenției, în legătură cu:The following is an example of an embodiment of the invention, in connection with:

- figura 1, care reprezintă o vedere tridimensională a grupului hidraulic;- Figure 1, which represents a three-dimensional view of the hydraulic group;

- figura 2, care reprezintă schema hidraulică;- Figure 2, which represents the hydraulic diagram;

- figura 3, care reprezintă ciclograma de funcționare.- figure 3, which represents the operating cycle.

Grupul hidraulic, eficient energetic, pentru unitate de pompare țiței, conform invenției, este constituit dintr-un cadru A pe care este fixat rezervorul B, care incorporează fluidul hidraulic, sistemul de încălzire sau de răcire C a rezervorului, fixat de cadru, pe capacul rezervorului fiind montate senzorul de temperatură 1, circuitul de pilotare 2 cu acumulator, blocul hidraulic 3 cu aparatajul de comandă 4 și control presiune 5, de cadrul A fiind montat motorul electric 6, solidar de flanșa acestuia fixându-se flanșa 7, solidară cu setul de pompe, cu debit constant 8, și cu debit variabil și reglaj proporțional 9, pompa cu debit variabil și reglaj proporțional fiind prevăzută cu circuitul de pilotare proporțional 10, pompe antrenate de axul motorului electric printr-un cuplaj elastic, nefigurat, printr-un ax comun, de cadrul A fiind montat tabloul electric, nefigurat, blocul hidraulic 11, prevăzut cu un acumulator 12 de înmagazinare a energiei recuperate, prevăzut cu aparataj de comandă 13 și robineții 14 și 15, circuitele de legătură fiind realizate conform schemei hidraulice pentru a permite funcționarea conform ciclogramei, pentru acționarea cilindrului hidraulic 16 al unității de pompare, traductorul de debit 17 montat pe conducta de colectare a țițeiului pompat, senzorii de capăt de cursă a, b și traductorul de deplasare c montați corespunzător pe cilindrul hidraulic 16 permit reglarea cadenței unității de pompare prin circuitul de pilotare proporțional 10, un agregat de răcire 18 și un sistem de filtrare 19 asigură parametrii <- 2 0 1 4 -- 000621 4 -11- 2014 normali ai fluidului hidraulic, un drosel proporțional 20 permite reglarea vitezei de coborâre și a vitezei de frânare, la comanda preluată de la senzorul b.The hydraulic group, energy efficient, for the oil pumping unit according to the invention, consists of a frame A on which the reservoir B is fixed, which incorporates the hydraulic fluid, the heating or cooling system C of the reservoir, fixed by the frame, on the lid. the temperature sensor 1, the pilot circuit 2 with the battery, the hydraulic block 3 with the control unit 4 and pressure control 5, are mounted to the tank, the electric motor 6 is mounted on the A frame, the flange 7 is fixed to it, and the flange 7 is fixed, integral with the set of pumps, with constant flow 8, and with variable flow and proportional adjustment 9, the pump with variable flow and proportional adjustment being provided with the proportional pilot circuit 10, pumps driven by the axis of the electric motor through an elastic coupling, not shown, by a common shaft, from frame A being mounted the electric panel, not shown, the hydraulic block 11, provided with a battery 12 for storing the recovered energy, seen with control equipment 13 and valves 14 and 15, the connection circuits being made according to the hydraulic diagram to allow operation according to the cyclogram, for actuating the hydraulic cylinder 16 of the pumping unit, the flow transducer 17 mounted on the collecting pipe of the pumped crude oil, the end-of-stroke sensors a, b and the displacement transducer c properly mounted on the hydraulic cylinder 16 allow the speed of the pump unit to be regulated through the proportional control circuit 10, a cooling unit 18 and a filter system 19 provide the parameters <- 2 0 1 4 - 000621 4 -11- 2014 normal of the hydraulic fluid, a proportional drivetrain 20 allows the adjustment of the lowering speed and the braking speed, on the order taken from the sensor b.

O U -- O IU 6 2 - 9/O U - O IU 6 2 - 9 /

4 -11- 20144 -11- 2014

GRUP HIDRAULIC, EFICIENT ENERGETIC, PENTRU UNITATE DE POMPARE ȚIȚEIHYDRAULIC GROUP, ENERGY EFFICIENT, FOR PUMP AND PIPE UNIT

Claims

(Claim)

Hydraulic group, energy efficient, for oil pumping unit, for actuating the hydraulic cylinder of the pumping unit, characterized in that it consists of a frame A on which the reservoir B is fixed, which incorporates the hydraulic fluid, the heating or cooling system C of the tank, fixed by the frame, the temperature sensor 1, the pilot circuit 2 with the battery, the hydraulic block 3 with the control device 4 and pressure control 5, are mounted on the tank cover, the electric motor 6, integral with its flange, is mounted on the A frame. fixing the flange 7, integral with the pump set, with constant flow 8, and with variable flow and proportional adjustment 9, the pump with variable flow and proportional adjustment being provided with the proportional pilot circuit 10, pumps driven by the axis of the electric motor through an elastic coupling, not figured, by a common axis, of frame A being mounted the electric panel, not figured, the hydraulic block 11, p supplied with a rechargeable energy storage battery 12, provided with control equipment 13 and valves 14 and 15, the connection circuits being made according to the hydraulic diagram to allow operation according to the cyclogram, for actuating the hydraulic cylinder 16 of the pumping unit, the transducer flow 17 mounted on the pumped crude oil collecting pipe, the stroke end sensors a, b and the displacement transducer c properly mounted on the hydraulic cylinder 16 allow the pump unit to be adjusted through the proportional control circuit 10, a cooling aggregate 18 and a Filtration system 19 provides the normal parameters of the hydraulic fluid, a proportional drill 20 allows to adjust the lowering speed and the braking speed, at the control taken from the sensor b.