Fundamentals of designing hydraulic gear machines

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Autor:: Jarosław Stryczek

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Wydawnictwo:: Wydawnictwo Naukowe PWN
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Stron:: 352
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Hydraulic gear machines (HGM) are a type of machines applied in the hydraulic drive and control systems where gears are the main unit both in terms of the design and operation principle. HGMs are utilized for converting mechanical energy into hydraulic energy or vice versa. In the former case, the machines are pumps, and in the latter, hydraulic motors. The author has been dealing with HGMs for over 40 years, first individually, and for the last several years, as a member of the Fluid Power Research Group constituted at the Mechanical Engineering Department of Wroclaw University of Science and Technology, Poland.

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Szczegóły ebooka

ISBN Ebooka:: 978-83-012-1145-5, 9788301211455
Data wydania ebooka:: 2020-07-12 Data wydania ebooka często jest dniem wprowadzenia tytułu do sprzedaży i może nie być równoznaczna z datą wydania książki papierowej. Dodatkowe informacje możesz znaleźć w darmowym fragmencie. Jeśli masz wątpliwości skontaktuj się z nami sklep@ebookpoint.pl.
Rozmiar pliku ePub:: 10.3MB
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Technika i mechanika » Inne

Spis treści ebooka

Cover
Title page
Copyrights
Spis treści
Preface
1. Definition, systematics and methodology of designing hydraulic gear machines
- 1.1. Definition and systematics
- 1.2. Designing methodology
2. The process of energy transformation in hydraulic gear machines
- 2.1. General models of a pump and a motor
  - 2.1.1. General model of a pump
  - 2.1.2. General model of a motor
- 2.2. Ideal and real characteristics of a pump and a motor
  - 2.2.1. Characteristics of a pump
  - 2.2.2. Characteristics of a motor
- 2.3. Conclusions
3. Gears in the hydraulic gear machines
- 3.1. Teeth, gears and the external involute gear systems
  - 3.1.1. The tooth, the external gear
  - 3.1.2. The boundary number of teeth, correction of the external tooth
  - 3.1.3. The external involute gear system
    - 3.1.3.1. The uncorrected gear system, the principle of co-operation,the number of contact
    - 3.1.3.2. The corrected gear system, the principle of co-operation, the number of contact
- 3.2. Teeth, gears and the internal involute gear systems
  - 3.2.1. The tooth, the internal gear
  - 3.2.2. The boundary number of teeth, the correction of the internal tooth
  - 3.2.3. The internal involute gear system
    - 3.2.3.1. The uncorrected gear system, the principle of co-operation,the number of contact
    - 3.2.3.2. The corrected gear system, the principle of co-operation, the number of contact
    - 3.2.3.3. Interference of the gear teeth
- 3.3. Teeth, gears and the internal cycloidal gear systems
  - 3.3.1. Teeth, gears and the uncorrected internal epicycloidal gear system
  - 3.3.2. Teeth, gears and the corrected internal epicycloidal gear system
  - 3.3.3. Principle of co-operation in the epicycloidal gear system, the contact line, the number of contact.
  - 3.3.4. Teeth, gears and the uncorrected internal hypocycloidal gear system
  - 3.3.5. Teeth, gears and the corrected internal hypocycloidal gear system
  - 3.3.6. Principle of co-operation in the hypocycloidal gear system, the line of contact, the number of contact
  - 3.3.7. Principle of co-operation in the cycloidal gear system with moveable axes
  - 3.3.8. Principle of co-operation in the cycloidal multi-gear systems
- 3.4. Conclusions
4. Channels and clearances in the fluid power gear machines
- 4.1. The system of fixed channels and clearances
- 4.2. The system of moveable channels and clearances
- 4.3. The system of channels and clearances in the machines of the first group
  - 4.3.1. Inlet channel and inlet chamber
  - 4.3.2. Inlet bridge
  - 4.3.3. Outlet channel and outlet chamber
  - 4.3.4. Outlet bridge
  - 4.3.5. Axial and radial clearance
- 4.4. The system of channels and clearances in the machines of the second group
  - 4.4.1. Inlet channel and inlet chamber
  - 4.4.2. Inlet bridge
  - 4.4.3. Outlet channel and outlet chamber
  - 4.4.4. Outlet bridge
  - 4.4.5. Axial and radial clearance
- 4.5. The system of channels and clearances in the machines of the third group
  - 4.5.1. Inlet channel and inlet chamber
  - 4.5.2. Inlet bridge
  - 4.5.3. Outlet channel and outlet chamber
  - 4.5.4. Outlet bridge
  - 4.5.5. Axial and radial clearance
- 4.6. The system of channels and clearances in the machines of the fourth group
  - 4.6.1. The system of channels and clearances in the multifunctional hydraulic gear machine (MHGM)
  - 4.6.2. The system of channels and clearances in the ORBIT orbital motor
  - 4.6.3. The system of channels and clearances in the MAX orbital motor with double cycloidal gearing
- 4.7. Conclusions
5. Delivery and delivery pulsation, capacity and capacity pulsation of the fluid power gear machines
- 5.1. General formulae
  - 5.1.1. Instantaneous delivery
  - 5.1.2. The proper, theoretical and average delivery
  - 5.1.3. Delivery pulsation
- 5.2. Delivery and delivery pulsation in the machines of the first group
- 5.3. Delivery and delivery pulsation in the machines of the second group
- 5.4. Delivery and delivery pulsation in the machines of the third group
  - 5.4.1. Epicycloidal gear machines
  - 5.4.2. Hypocycloidal gear machines
- 5.5. Delivery of the machines of the fourth group
- 5.6. Conclusions
6. Pressure and pressure pulsation in the fluid power gear machines
- 6.1. Theoretical characteristics of changes of the pressure and pressure pulsation in intertooth displacement chamber T in machines of the firstthird groups
- 6.2. Theoretical characteristics of changes of the pressure and pressure pulsation in the intertooth displacement chamber in machines of the fourth group
- 6.3. Conclusions
7. The visual study of the flow processes and phenomena in the channels and clearances of the gear machines
- 7.1. General comments
- 7.2. The subject and methodology of the visual study, the test stand
- 7.3. The visual study of the machines of the first group
  - 7.3.1. Inlet channel and inlet chamber
- 7.3.2. Inlet bridge
  - 7.3.3. Outlet channel and outlet chamber
  - 7.3.4 Outlet bridge
  - 7.3.5 Relief grooves in the outlet bridge zone
  - 7.3.6. Axial clearance
- 7.4. The visual study of the machines of the second group
  - 7.4.1. Inlet channel and inlet chamber
  - 7.4.2. Inlet bridge
  - 7.4.3. Outlet channel and outlet chamber
  - 7.4.4. Outlet bridge
- 7.5. The visual study of the machines of the third group
  - 7.5.1. Inlet channel and inlet chamber
  - 7.5.2. Inlet bridge
  - 7.5.3. Outlet channel and outlet chamber
  - 7.5.4. Outlet bridge
- 7.6. Conclusions
8. Pressure study in the channels and clearances of the gear machines
- 8.1. The subject and methodology of the study, the test stand
- 8.2. Study of the pressure in the channels and clearances of the machines of the first group
  - 8.2.1. Study of gear pump I without the axial clearance compensation
  - 8.2.2. Study of gear pump II with the axial clearance compensation
- 8.3. Study of the pressure in the channels and clearances of the machines of the second and third group
- 8.4. Conclusions
9. Designing the housings of the fluid power gear machines
- 9.1. Methodology of designing the housings of the fluid power gear machines
- 9.2. Determining the design and technological requirements for the housings of the pumps
- 9.3. Determining the basic shape of the pumps
- 9.4. Strength analysis of the basic shape gear pump housings by means of FEM
  - 9.4.1. Geometrical models, load and fixation
  - 9.4.2. Numerical models, research programme
  - 9.4.3. Results of the strength analysis of the basic shape pump housings
- 9.5. Global and local modification of the basic shape housing
- 9.6. Strength analysis of the housings of the modified shape gear pumps by means of FEM
- 9.7. Assumption of the final shape of the pumps
- 9.8. Conclusions
10. Designing of the axial clearance compensation system
- 10.1. Principle of axial clearance compensation. Methodology of designing the axial clearance compensation system
- 10.2. Designing the axial clearance compensation system in the machines of the first group
  - 10.2.1. Assumption of a design solution of the compensation system
  - 10.2.2. Defining Ap area of the pressure working in the axial clearance, and the division of the area into partial areas Api
  - 10.2.3. Defining the distribution of partial pressure pi working on partial areas Api
  - 10.2.4. Defining partial pressure repulsive forces Fpi and pressure repulsive forces Fp
  - 10.2.5. Defining partial torques of the repulsive forces Mpi and total torque of the repulsive forces Mp
  - 10.2.6. Defining points of application xpi, ypi of partial pressure repulsive forces Fpi and point of application xp, yp of total pressure repulsive forces Fp
  - 10.2.7. Shaping total compensation area Ac and its division into partial areas Aci. Determining of compensation pressure pc
  - 10.2.8. Defining partial compensation forces Fci and total compensation force Fc
  - 10.2.9. Defining coordinates xci, yci of the points of application of partial compensation forces Fci and coordinates xc, yc of the points of application of total compensation force Fc
  - 10.2.10. Comparison of total pressure repulsive forces Fp and its point of application xp, yp with total compensation force Fc and its point of application xc, yc.
- 10.3. Designing the axial clearance compensation system in the machines of the second group
  - 10.3.1. Assumption of a design solution of the compensation system.
  - 10.3.2. Defining partial pressure repulsive forces Fpi and total pressure repulsive force Fp
  - 10.3.3. Defining points of application xpi, ypi of partial pressure repulsive forces Fpi and point of application xp, yp of total pressure repulsive force Fp
  - 10.3.4. Shaping total compensation area Ac and its division into partial areas Aci. Determining of compensation pressure pc
  - 10.3.5. Defining partial compensation forces Fci, coordinates xci, yci of the points of its application, total compensation force Fc and coordinates xc, yc of the point of its application
  - 10.3.6. Comparison of total pressure repulsive force Fp and its point of application xp, yp with total compensation force Fc and its point of application xc, yc
- 10.4. Designing the axial clearance compensation system in the machines of the third group
- 10.5. Designing the axial clearance compensation system in the machines of the fourth group
- 10.6. Conclusions
11. Design solutions of fluid power gear machines
About Author
References

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