Wyniki wyszukiwania dla: COMPENSATION UNIT, SATELLITE MOTOR, HYDRAULIC MOTOR, AXIAL CLEARANCES, SATELLITE MECHANISM, ADVANCED DESIGN - MOST Wiedzy

Wyszukiwarka

Wyniki wyszukiwania dla: COMPENSATION UNIT, SATELLITE MOTOR, HYDRAULIC MOTOR, AXIAL CLEARANCES, SATELLITE MECHANISM, ADVANCED DESIGN

Wyniki wyszukiwania dla: COMPENSATION UNIT, SATELLITE MOTOR, HYDRAULIC MOTOR, AXIAL CLEARANCES, SATELLITE MECHANISM, ADVANCED DESIGN

  • The methodology of design of axial clearances compensation unit in hydraulic satellite displacement machine and their experimental verification

    A new methodology of calculating the dimensions of the axial clearance compensation unit in the hydraulic satellite displacement machine is described in this paper. The methods of shaping the compensation unit were also proposed and described. These methods were used to calculate the geometrical dimensions of the compensation field in an innovative prototype of a satellite hydraulic motor. This motor is characterized by the fact...

    Pełny tekst do pobrania w portalu

  • The basics of design and experimental tests of the commutation unit of a hydraulic satellite motor

    he article presents an analytical method to design the commutation unit in a hydraulic satellite motor. It is shown that the size of the holes feeding the working chambers and their location on the plates closing those chambers depends on the geometrical dimensions of the working mechanism. The overlap in the commutation unit depends on the rotational speed range. It is demonstrated that the geometrical dimensions of the commutation...

    Pełny tekst do pobrania w portalu

  • Influence of water and mineral oil on the leaks in satellite motor commutation unit clearances

    Publikacja

    The article describes the flow rates of mineral oil and water flowing, as working media, through the commutation unit of a hydraulic satellite motor. It is demonstrated that geometrical dimensions of commutation unit clearances change as a function of the machine shaft rotation angle. Methods for measuring the rate of this flow and the pressure in the working chamber are presented. The results of pressure measurements in the working...

    Pełny tekst do pobrania w portalu

  • On the durability of the hydraulic satellite motor working mechanism in overload condition

    Publikacja

    The paper presents the newest construction of the hydraulic satellite pump/motor. In this study, the fracture of the hydraulic satellite motor working mechanism is investigated. Factors influencing the durability of satellite working mechanism have been described. The durability of the hydraulic satellite motor working mechanism at a load, corresponding to a pressure of 15 MPa supplied with refined rapeseed oil is very low. Analyses...

    Pełny tekst do pobrania w portalu

  • Experimental Study of Flow Rate in Hydraulic Satellite Motor with the Rotating Case at a Low Constant Rotational Speed

    Publikacja

    - Rok 2023

    In this article was described the methodology for the experimental study of flows in the prototype of a satellite hydraulic motor with a rotating body. The experimental tests of the motor were carried out at a low constant rotational speed in a wide range of pressure drop in this motor. The constant rotational speed of the motor was kept by a worm gear. Based on the test results, the leakage characteristics in the flat gaps of...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Badania kompensacji luzów osiowych w hydraulicznych silnikach satelitowych = Researcg of axial clearances compensation in hydraulic satellite motors

    Publikacja

    - Rok 2010

    W pracy doktorskiej przedstawiono koncepcje silnika z mechanizmem satelitowym III typu. Istotną nowością w koncepcji tego typu silnika satelitowego jest zastosowanie nowego specjalnego rozwiązania kompensacji luzów osiowych dla zmniejszania przecieków przez szczeliny czołowe mechanizmu. Ma to zapewnić ich eksploatację również z cieczami roboczymi o bardzo małych lepkościach i możliwość uzyskania małych prętkości obrotowych.

  • Influence of geometrical and operational parameters on tooth wear in the working mechanism of a satellite motor

    Publikacja

    This article describes the phenomena affecting the wear of the rotor of the working mechanism in a hydraulic satellite motor. The basic geometrical relationships that allow the calculation of the coordinates of the points of contact between the satellite and the rotor and the curvature are presented. A method for calculating the number of contacts of the satellite teeth with the rotor teeth and of the satellite teeth with the curvature...

    Pełny tekst do pobrania w portalu

  • Losses and power balance in hydraulic satellite motor supplied with oil and HFA-E emulsion

    Publikacja

    - Rok 2009

    Mineral oil and HFA-E emulsion are liquids which differ in viscosity, density and lubricant properties. Therefore, supplying hydraulic satellite motor with these liquids, differences between quantity of hydraulic, volumetric and mechanical losses are observed. These losses influence efficiency of conversion of hydraulic energy into mechanical energy and thereby power balance of motor. The research of satellite motor has been conducted...

  • Flow of liquid in flat gaps of the satellite motor working mechanism

    Publikacja

    The article describes the methodology and results of investigations of the flow of oil and HFA-E emulsion in flat gaps of the working mechanism of a satellite motor. The flow of liquid in those gaps is turbulent and not fully developed. The article presents two methods of modelling this flow. Method I makes use of the Darcy-Weisbach formula, while Method II bases on the assumption that in the variable-length gaps the flow is turbulent...

    Pełny tekst do pobrania w portalu

  • Satellite pump and motor

    The article describe the design and operation of a prototype of satellite pump and a prototype of satellite motor. In both machines, the operating mechanism consists of a non-circular gear with external teeth (rotor), non-circular gear with internal teeth (curvature), and ten gear wheels which cooperate with the rotor and the curvature. The differences between the commutation unit in the pump and the commutation unit in the motor...

  • Comparison of Mathematical Models of Torque Transmitted by Multi-disc Wet Clutch with Experimental Results

    Publikacja

    - Rok 2023

    In this article was described the methodology for the experimental study of flows in the prototype of a satellite hydraulic motor with a rotating body. The experimental tests of the motor were carried out at a low constant rotational speed in a wide range of pressure drop in this motor. The constant rotational speed of the motor was kept by a worm gear. Based on the test results, the leakage characteristics in the flat gaps of...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Metodyka badań rozwojowych nowego typu silników i pomp satelitowych

    Publikacja

    - Rok 2009

    Research and development of new type satellite motors and satellite pumps SM with small geometrical displacement, from 5 to 73 cm3/rev, has been conducted in cooperation with Stosowanie Maszyn company from Katowice (manufacturer of motors and pump SM). The improvement of construction of those machines, especially construction of axial compensation and construction of fluid distribution channels have been the main problem of research...

  • Compact satellite hydraulic unit

    The article describes the design and operation of a prototype hydraulic unit. It is based on an inversed kinematics, satellite pump in which the body rotates around the shaft. The pump is placed inside the electric motor. Thanks to that the compact and low mass construction was achieved. Thanks to new commutation unit with enlarged channels, lower pressure losses were obtained. The article presents the construction and results...

  • The Influence of Water and Mineral Oil on Mechanical Losses in a Hydraulic Motor for Offshore and Marine Applications

    Publikacja

    In this paper, mechanical losses in a hydraulic motor supplied with water and mineral oil (two liquids having significantly different viscosity and lubricating properties) are described and compared. The experimental tests were onducted using a special design (prototype) of a hydraulic satellite motor. The design of the satellite motor is presented. This motor was developed to supply both with water and mineral oil and features...

    Pełny tekst do pobrania w portalu

  • Compensation of pressure peaks in pwk-type hydraulic pumps

    Publikacja

    - Key Engineering Materials - Rok 2012

    hydraulic axial pumps equipped with cam-driven commutation unit (pwk pumps) proved their high efficiency up to 55 mpa and ability to work self-sucking, even at high speed. displacement of pwk pump may easily be changed by moving its control cam. full discharge from hydrostatic forces makes such control possible by direct action of a low-energy actuator like proportional electromagnet or stepping motor. that eliminates heavy and...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Determination of the theoretical and actual working volume of a hydraulic motor

    Publikacja

    - ENERGIES - Rok 2020

    A new methodology of determination of the theoretical and actual working volume of a hydraulic motor based on the characteristics of the delivered flow rate into hydraulic motor vs. the rotational speed at a constant pressure drop in the working chambers is described in this paper. A new method of describing the delivered flow rate into a motor per one shaft revolution as a nonlinear function of the pressure drop in the motor working...

    Pełny tekst do pobrania w portalu

  • Analysis of the Heating Process of Hydraulic Motors during Start-Up in Thermal Shock Conditions

    Publikacja

    - ENERGIES - Rok 2021

    Conditions that prevail during harsh winters and hot summers pose a serious challenge for machine designers building devices suitable for operation in extreme weather. It is essential for the designers and the users to define the principles and conditions for the safe operation of machines and devices with hydraulic drive in low ambient temperatures. Bearing in mind the above, the author tested the hydraulic motors in thermal shock...

    Pełny tekst do pobrania w portalu

  • Methods of Determining Pressure Drop in Internal Channels of a Hydraulic Motor

    Publikacja

    In this paper, new methods for determining the pressure drop in internal channels of a hydraulic motor are proposed and described. Mathematical models of pressure losses in internal channels have also been described. Experimental tests of the satellite motor were carried out according to one of the proposed methods. The tests were carried out for two liquids, i.e., water and mineral oil. Experimental studies have shown that at...

    Pełny tekst do pobrania w portalu

  • The Influence of Water and Mineral Oil on Pressure Losses in Hydraulic Motor

    Publikacja

    In this paper, pressure losses in hydraulic motor supplied with water and mineral oil (two liquids that have significantly different viscosity and lubricating properties) are described and compared. The experimental tests were conducted using a hydraulic satellite motor that is dedicated to working with different liquids, including water. The methodology of measuring the pressure drop in internal channels of this motor is also...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • The influence of water and mineral oil on volumetric losses in a hydraulic motor

    Publikacja

    In this paper volumetric losses in hydraulic motor supplied with water and mineral oil (two liquids having significantly different viscosity and lubricating properties) are described and comparison. The experimental tests were conducted using an innovative hydraulic satellite motor, that is dedicated to work with different liquid, including water. The sources of leaks in this motor are characterized and described also. On this...

    Pełny tekst do pobrania w portalu

  • PROBLEMS OF THE STARTING AND OPERATING OF HYDRAULIC COMPONENTS AND SYSTEMS IN LOW AMBIENT TEMPERATURE (PART V) METHODS ENSURING CORRECT START-UP OF HYDRAULIC COMPONENTS OF SHIP’S ONBOARD DEVICES IN LOW AMBIENT TEMPERATURES

    Publikacja

    A large number of hydraulic devices and systems are started in low ambient temperatures. A good example of such a device is the hoisting winch on the ship. Starting hydraulic drive units in thermal shock conditions (rapid supply of hot oil to the cold unit) may lead to incorrect operation of the actuating system, for instance, due to the loss of clearance between cooperating elements. The article presents methods to prevent the...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • New generation of the satellite hydraulic pumps

    Hydraulic satellite machines are known and produced in many versions, recognizable by the number of humps on their inner rotor and external gear, and therefore by the number of cooperating gears (satellites). All known shapes were however designed on the base of preliminary assumption that rotor’s and external gear’s pitch lines are formed by merging arcs, tangent to each other in the. This assumption makes calculations easier,...

    Pełny tekst do pobrania w portalu

  • The Methodology for Determining the Theoretical Based on the Characteristics of Effective Absorbency Versus Pressure Drop in the Motor

    Publikacja

    - Rok 2023

    This article describes a method for determining the theoretical and actual working volume of a hydraulic motor. It has been shown that the actual working volume of the motor is the sum of the theoretical working volume and the additional volume that depends on the pressure drop in the working chambers of the motor. It was also shown that the volumetric losses in the hydraulic motor are not only a function of the pressure drop in...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Satelitowy agregat pompowy

    Publikacja

    W artykule opisano najnowszą konstrukcję satelitowego agregatu pompowego charakteryzującego się tym, że pompa satelitowa jest umieszczona wewnątrz silnika elektrycznego i zasysa ciecz poprzez otwór wydrążony osiowo w wale silnika. Zastosowana w agregacie pompa satelitowa jest nowatorską konstrukcją zawierającą mechanizm satelitowy o odwróconej kinematyce znamienny tym, że planeta (wirnik) oraz płyty kompensacyjne (rozrządu) są...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Funkcjonowanie zespołów napędu hydraulicznego maszyn w niskich temperaturach otoczenia

    Publikacja

    - Rok 2018

    W pracy przedstawiono cztery warianty klasyfikacji rozruchów oziębionego napędu hydraulicznego. Pierwsza sytuacja dotyczy zagadnienia, w którym wszystkie zespoły układu napędowego wraz z olejem mają taką samą niską temperaturę podczas rozruchu. Pozostałe warianty odnoszą się do rozruchu w warunkach szoku termicznego wywołanych zasilaniem ciepłym czynnikiem roboczym oziębionych zespołów hydraulicznych. Rozruch zespołów...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Nowe możliwości generowania zarysów satelitowych mechanizmów roboczych

    Publikacja

    - Rok 2012

    Planetary hydraulic gear motors have been well known since 70's . first motors were constructed for maritime industry by hydroster from gdansk. the evolution of this type of motors led to an increase of nominal pressure and durability. nowadays the industry needs reliable and efficient motor able to work with alternative hydraulic fluids like water, emulsion and vegetable oil. therefore a new type of motors are being developed...

  • Results of experimental research of hydraulic satellite motor

    Dane Badawcze
    restricted access

    The study of the flow rate in the motor and the torque on the motor shaft at low constant speed were carried out.The file contains measurement data of the torque on the motor shaft and the flow rate in the motor as a function of the angle of shaft rotation at various constant pressure drops in the motor.

  • The methodology of design of satellite working mechanism of positive displacement machine

    Publikacja

    In this paper is described a methodology of design of satellite mechanism consisting of two noncircular gears (externally toothed rotor and internally toothed curvature) and circular gears (satellites). In the presented methodology is assumed that the rotor pitch line is known, and the curvature pitch line is necessary to designate. The presented methodology applies to mechanisms for which the number of the curvature humps is at...

    Pełny tekst do pobrania w portalu

  • The influence of pressure drop on the working volume of a hydraulic motor

    Reliability and maintenance analysis of hydraulic positive machines basicly focused on the processes of their wear and failure. But in order to correctly assess the mechanical and volumetric efficiency of a hydraulic motor, both at the stage of development research or at the stage of control tests during its exploitation, the working volume of this motor must be correctly determined. Therefore this paper proposes a new method of...

    Pełny tekst do pobrania w portalu

  • Diagnostics of commutation unit in satellite pumps and motors

    The article describes a part of the research on the development of satellite pumps and motors, conducted on Gdansk University of Technology as a part of grant "New elaborate of hydraulic satellite machines for drives with vegetable liquids and non-flammable liquids" (LIDER/35/102/L-2/10/NCBiR/2011) funded by the National Centre for Research and Development in Poland. The presented area includes the diagnostics of commutation units...

  • Diagnostics of commutation unit in satellite pumps and motors

    Publikacja

    The article describes a part of the research on the development of satellite pumps and motors, conducted on Gdansk University of Technology as a part of grant "New elaborate of hydraulic satellite machines for drives with vegetable liquids and non-flammable liquids" (LIDER/35/102/L-2/10/NCBiR/2011) funded by the National Centre for Research and Development in Poland. The presented area includes the diagnostics of commutation units...

  • Investigation method and mathematical model of pressure losses in hydraulic rotary motor

    Publikacja

    Tis paper presents a way of determining the coefcient k of the pressure losses Δp (fow drag) in internal ducts 8 Mp of SWSB-63 hydraulic motor. Te coefcient is determined at a fow rate equal to the theoretical capacity Q of the Pt pump feeding the motor , the losses are related to the nominal pressure p in the hydraulic system. Te investigations n followed a model of energy performance of hydraulic rotary motor, proposed by...

    Pełny tekst do pobrania w portalu

  • Design, modelling and analysis of a new type of piezoelectric motor. Multicell piezoelectric motor

    Publikacja

    This paper describes a new type of piezoelectric motor. The results, obtained in the field of piezoelectric motors, have pointed out that these motors have potentially high possibilities in the future special applications. The research work presents the design, simulations and parameters of the piezoelectric motor with three rotation-mode actuators. The motor is characterized by a high power, relative high speed and torque. The...

  • Determination of the Theoretical and Actual Working Volume of a Hydraulic Motor—Part II (The Method Based on the Characteristics of Effective Absorbency of the Motor)

    Publikacja

    - ENERGIES - Rok 2021

    : In this article, the second method of determination of the theoretical and actual working volume of a hydraulic motor is described. The proposed new method is based on the characteristics of effective absorbency of the motor. The effective absorbency has been defined as the ratio of flow rate in a motor to the rotational speed of the motor’s shaft. It has been shown that the effective absorbency is a nonlinear function of the...

    Pełny tekst do pobrania w portalu

  • Power balance in hydraulic satellite motors supplied with oil and HFA-E emulsion

    Publikacja

    - Rok 2008

    Mineral oil and HFA-E emulsion are liquids which differ in viscosity, density and lubricant properties. Therefore, supplying hydraulic satellite motors with these liquids, differences between quantity of hydraulic, volumetric and mechanical losses are observed. These losses influence efficiency of conversion of hydraulic energy into mechanical energy and thereby power balance of motors.

  • Impact of commutation unit design on hydraulic axial pump performance.

    Publikacja

    - Rok 2005

    Przedstawiono zależność pomiędzy konstrukcją mechanizmu rozrządu hydraulicznych pomp wielotłoczkowych osiowych a sprawnością i ciśnieniem pracy osiąganą przez te pompy. Zaprezentowano wyniki badań doświadczalnych.

  • Satellite navigation [EMSS]

    Kursy Online
    • P. Falkowski-Gilski
    • J. Demkowicz

    This course is designed for M.Sc. students of Space and Satellite Technologies, including Computer Science and Aerospace Technologies, within the specialty Engineering and Management of Space System [EMSS].

  • Satellite navigation [EMSS]

    Kursy Online
    • P. Falkowski-Gilski
    • J. Demkowicz

    This course is designed for M.Sc. students of Space and Satellite Technologies, including Computer Science and Aerospace Technologies, within the specialty Engineering and Management of Space System [EMSS].

  • Evaluation of losses in a hydraulic motor based on the SWSB - 63 motor tests

    Publikacja

    In this paper are compared two models of energy losses: that suggested by Prof. Paszota,Z. in monograph "Energy losses in the hydraulic displacement motors - definitions and relations serving the evaluation of the efficiency of hydrostatic drive" [18] and that ofProf. Balawender, A. in "Energy analysis and methodology of testing of low-speed hydraulic motors" [1]. By using the data obtained from the tests of SWSB-63 hydraulic motors...

    Pełny tekst do pobrania w portalu

  • Simulation of fluid structure interaction in a novel design of high pressure axial piston hydraulic pump

    Publikacja

    - Archive of Mechanical Engineering - Rok 2013

    A novel type of an axial, piston-driven high pressure hydraulic pump with variable capacity marks a significant improvement in the area of the hydraulic machinery design. Total discharge from hydrostatic forces eliminates a need for a servomechanism, thus simplifying operation, reducing weight and introducing the possibility of the pump displacement control by computer. PWK-type pumps, invented in the Gdansk University of Technology,...

    Pełny tekst do pobrania w portalu

  • Method of sum of power losses as a way for determining the ki coefficients of energy losses in hydraulic motor

    Publikacja

    This paper shows application of the method of sum of power losses to determining energy losses which occur in hydraulic rotary motor in situation when not all laboratory data are at one’s disposal or when no use is made of data contained in catalogue charts. The method makes it possible to determine the coefficients ,ki , of energy losses occurring in the motor. The method of sum of power losses is based on the approach proposed...

    Pełny tekst do pobrania w portalu

  • Design of compound curves adapted to the satellite measurements

    Publikacja

    The paper deals with a novelty related to the design of a region for an alternative railway track direction adequate for mobile satellite measurements. The new approach may become particularly useful in the design of the existing track axis control when the determination of both the main track directions becomes impossible. The only solution in that case is to apply to the geometrical system two circular arcs of a different radius,...

    Pełny tekst do pobrania w portalu

  • Protection System Design of Induction Motor for Industries

    Publikacja

    - Rok 2022

    The fundamental and durable structures of induction motor, as well as their low manufacturing cost, make them popular components in a wide range of current applications. Providing a safety net for employees is a must-have for businesses. This project’s motivation for improvement is to provide industrial motors, lift motors, pumps, and so on with safety. An induction motor’s primary goal is to protect it from problems, such as...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Protection System Design of Induction Motor for Industries

    Publikacja

    - Modelling and Simulation in Engineering - Rok 2022

    The fundamental and durable structures of induction motor, as well as their low manufacturing cost, make them popular components in a wide range of current applications. Providing a safety net for employees is a must-have for businesses. This project’s motivation for improvement is to provide industrial motors, lift motors, pumps, and so on with safety. An induction motor’s primary goal is to protect it from problems, such as...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Sensorless low speed PMSM motor control with cogging torque compensation

    The paper presents sensorless control of a low speed permanent magnet synchronous machine with use of modified state observer. An overview of the PMSM motor used in the research setup was presented. The problem of drive torque ripple, resulting mainly from the occurrence of a significant cogging torque, was discussed. A solution compensating the torque ripple of the PMSM motor was proposed. A start-up procedure of the speed control...

    Pełny tekst do pobrania w portalu

  • Adam Dąbrowski dr inż.

    Osoby

    Adam Dąbrowski uzyskał stopień doktora nauk inżynieryjno-technicznych w dyscyplinie inżynieria mechaniczna na Politechnice Gdańskiej oraz ukończył studia II stopnia na kierunku mechatronika na Technische Universität Hamburg a także double degree Engineering and Management of Space Systems na Hochschule Bremen. Posiada doświadczenie przemysłowe (Instytut Lotnictwa w Warszawie, SICK AG w Hamburgu, Blue Dot Solutions w Gdańsku, Niemieckie...

  • Design and modeling of the piezoelectric motor based on three resonance actuators

    Publikacja

    - Rok 2015

    This paper describes a piezoelectric motor which combines advantages from two existing piezoelectric motors topologies. The research work presents the design, simulations and measurements of the piezoelectric motor with three rotation-mode actuators. The aim of the project was to obtain the high speed piezoelectric motor. Other advantages of this conception are blocking torque, short response times, the ability to work in a hostile...

  • Energy Loss Coefficients ki in a Displacement Pump and Hydraulic Motor used in Hydrostatic Drives

    Publikacja

    The article aims at defining and analysing the energy loss coefficients in design solutions of rotating displacement machines, with a piston machine as an example. The energy losses observed in these machines include mechanical loss, volumetric loss, and pressure loss. The scale and relations between these losses in different machines depend on machine design and manufacturing quality, and on operating parameters. The operating...

    Pełny tekst do pobrania w portalu

  • Satellite Navigation

    Czasopisma

    ISSN: 2662-9291 , eISSN: 2662-1363

  • Design of reverse curves adapted to the satellite measurements

    Publikacja

    The paper presents a new method for designing railway route in the direction change area adapted to the Mobile Satellite Measurements technique. The method may be particularly useful in the situations when both tangents cannot be connected in an elementary way using a circular arc with transition curves. Thus, the only solution would be the application of two circular arcs of opposite curvature signs, that is, the use of an inverse...

    Pełny tekst do pobrania w portalu