Calculation of main parameters of axial piston pump

Contents

Task

Conventions and abbreviations

Introduction

1.1. Description of design and principle of action

2. Design Part

2.1. Calculation of cylinder block

2.2. Distributor calculation

2.3 Calculation of conical transmission

2.4. Calculation of shafts

2.5. Calculation of rolling bearings

Conclusion

List of sources used

Appendix 1 Assembly drawing

Appendix 2 Specification

Task

To calculate the main parameters of the axial-piston pump with an inclined unit with gear drive, based on the obtained data, build a sketch of the machine.

Source Data:

Vo = 20cm3

P = 20MPa

n = 3000min-1

Define cylinder block size

Perform strength and stiffness calculation

Perform distributor calculation

Calculate gear engagement

Evaluation of shaft and bearing dimensions

Machine Sketch

Introduction

Axial-piston hydraulic machines with gear drive have become very common in mechanical engineering, especially in automatic drives. They have the best specific weight characteristics among all types of hydraulic machines (2.7-9.8 kg/kW for adjustable machines and 0.95-4.2 kg/kW for non-adjustable ones). They differ in compactness, high volume (0.93 9.99) and effective (0.90 -0.93) efficiency, are suitable for operation at high speeds and pressures (45 MPa), and have relatively low inertia.

Adjustable hydraulic machines (pumps) are used in cases when it is necessary to quickly and accurately control the flow rate of working fluid by the value and direction in the serviced hydraulic system.

Control of the supply in these pumps depending on the type of hydraulic machine is carried out either remotely or manually.

Non-adjustable hydraulic machines are used both as hydraulic motors and as constant-capacity pumps.

For closed circuit pumps of general machine applications, in most cases the number of revolutions of 1500 per minute is assumed with an increase in some cases to 3000 per minute. When operating in self-suction mode, the number of revolutions is recommended to be reduced by 20 30%.

Conclusion

During the course work, the main parameters of the axial piston pump with an inclined unit with gear drive were calculated and a pump with a working volume of Vo = 20 cm3 was designed for them; pressure P = 20 MPa; shaft speed n = 3000 min-1. Based on the obtained values, a sketch of this pump was formed, relying on an analogue of the machine. The main differences between the developed pump and the analogue are a more thorough study of the design, an end distribution disk is used, the cuff is pressed into the cover of the body. Ball radial and ball radial-thrust bearings are also used. The completed course work made it possible to get acquainted with the method of calculating axially piston pumps with an inclined unit with gear drive, to get the necessary skill in work, with technical literature.