WO2016162733A1

WO2016162733A1 - Hydro-motors system with variable combination units

Info

Publication number: WO2016162733A1
Application number: PCT/IB2015/052610
Authority: WO
Inventors: Mohammad Taghi ABBASSZADEH; Mehrdad ABBASSZADEH
Original assignee: Abbasszadeh Mohammad Taghi; Abbasszadeh Mehrdad
Priority date: 2015-04-10
Filing date: 2015-04-10
Publication date: 2016-10-13
Also published as: EP3280913A4; EP3280913A1

Abstract

The embodiments herein relate to a system for moving a load through a plurality of hydraulic pumps. The system comprises a plurality of hydraulic motors, a plurality of hydraulic pumps and a load shaft. Each hydraulic motor comprises a fluid chamber, an input valve, an output valve and an output shaft. The fluid chamber comprises a piston having its movement due to a fluid flow inside the fluid chamber. The input valve in each hydraulic motor controls an intake fluid flow. The output valve is placed at a displaced position with respect to the input valve on the fluid chamber. The output shaft is connected to the piston in the fluid chamber. The input and output valves of the plurality of hydraulic are connected to a fluid supply conduit in either a series mannerism or a parallel mannerism.

Description

HYDRO-MOTORS SYSTEM WITH VARIABLE COMBINATION UNITS

BACKGROUND

Technical Field of Invention

[001] The embodiments herein generally relate to a hydro-mechanical system and particularly relate to a hydraulic motor system with variable combination units.

Description of Related Art

[002] A hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into torque and angular displacement (rotation). The hydraulic motor is the rotary counterpart of the hydraulic cylinder. Conceptually, a hydraulic motor should be interchangeable with a hydraulic pump because it performs the opposite function - similar to the way a DC electric motor is theoretically interchangeable with a DC electrical generator. However, most hydraulic pumps cannot be used as hydraulic motors because they cannot be backdriven. Also, a hydraulic motor is usually designed for working pressure at both sides of the motor.

[003] One of the prior arts discloses a drive system includes two reversible hydraulic motors connected in parallel to a variable displacement pump and controlled by respective 4-port, 2-position valves. The motors, at least one of which is a variable flow, variable speed motor, are coupled to a single output shaft via an intermediate gear section. The hydraulic motors are positioned on one side of the intermediate gear section and their respective drive shafts are arranged parallel relative to one another. A clutch, which is concentrically disposed within an axial bore of a gear member, is operable to couple the drive shaft of a first of the motors to the output shaft. A second gear member, which is driven by the output shaft of a second of the motors, is adapted to mesh with the first gear member. If both motors are of variable speed construction, it is possible to operate the drive in three speed ranges, i.e. by operation of the first hydraulic motor only, by operation of the second hydraulic motor only, or by simultaneous operation of both hydraulic motors.

[004] However, the hydraulic motor used conventionally allows only a sudden speed transition and braking ability which is undesirable during a handling of a sophisticated load. Also the hydraulic motors used for a vehicle movement have a same speed for all wheels which creates a troublesome turning of the vehicles.

[005] In the view of foregoing, there is a need for a system of the hydraulic motors with a smooth and wide transition in the output rotation speed during an acceleration and braking.

[006] The above mentioned shortcomings, disadvantages and problems are addressed herein, as detailed below.

OBJECT OF THE INVENTION

[007] The primary object of the embodiments herein is to provide a system of hydraulic motor with various combination to provide a variable load speed.

[008] Another object of the embodiments herein is to provide a system of hydraulic motors with various combination to provide variable braking force.

[009] Yet another object of the embodiments herein is to provide a system of hydraulic motors for independent wheel drive.

[0010] These and other objects and advantages of the embodiments herein will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. SUMMARY OF THE INVENTION

[0011] The various embodiments herein disclose a system for moving a load through a plurality of hydraulic pumps. The system comprises a plurality of hydraulic motors, a plurality of hydraulic pumps and a load shaft. Each hydraulic motor comprises a fluid chamber, an input valve, an output valve and an output shaft. The fluid chamber comprises a piston having its movement due to a fluid flow inside the fluid chamber. The input valve in each hydraulic motor control an intake fluid flow. The output valve is placed at a displaced position with respect to the input valve on the fluid chamber. The output shaft is connected to the piston in the fluid chamber. The input and output valves of the plurality of hydraulic are connected to a fluid supply conduit in either a series mannerism or a parallel mannerism. The plurality of hydraulic pumps are connected to the plurality of hydraulic motors through one or more fluid conduits. The load shaft is connected to the output shaft of the hydraulic motors. The output shafts of the plurality of hydraulic motors are connected to the load shaft in a series mannerism or a parallel mannerism.

[0012] According to an embodiment herein, the output valve is closed to apply a braking effect on the output shaft. A force of braking is directly proportional to the number of the output valves closed.

[0013] According to an embodiment herein, the speed of revolution of the output shaft is directly proportional to number of the open input valves.

[0014] According to an embodiment herein, the input and output valves of the plurality of hydraulic motors are connected in series and also the output shaft of the plurality of hydraulic shafts are connected in series with each other. [0015] According to an embodiment herein, the input and output valves of the plurality of hydraulic motors are connected in series and also the output shaft of the plurality of hydraulic shafts are connected in parallel with each other.

[0016] According to an embodiment herein, the input and output valves of the plurality of hydraulic motors are connected in parallel and also the output shaft of the plurality of hydraulic shafts are connected in series with each other.

[0017] According to an embodiment herein, the input and output valves of the plurality of hydraulic motors are connected in parallel and also the output shaft of the plurality of hydraulic shafts are connected in parallel with each other.

[0018] According to an embodiment herein, an output shaft of each hydraulic motor is independently connected to a load shaft.

[0019] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The other objects, features and advantages will occur to those skilled in the art from the following description of the preferred embodiment and the accompanying drawings in which:

[0021] FIG. la illustrates a series combination of the hydraulic motors, according to an embodiment herein. [0022] FIG. lb illustrates a parallel combination of hydraulic motors, according to an embodiment herein.

[0023] FIG. 2 illustrates an implementation of hydraulic motor in driving a load, according to an embodiment herein.

[0024] FIG. 3 illustrates an implementation of the hydraulic motor in conjunction with a hydraulic pump in a wheel rotation, according to an embodiment herein.

DETAILED DESCRIPTION OF THE DRAWINGS

[0025] In the following detailed description, a reference is made to the accompanying drawings that form a part hereof, and in which the specific embodiments that may be practiced is shown by way of illustration. The embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments and it is to be understood that the logical, mechanical and other changes may be made without departing from the scope of the embodiments. The following detailed description is therefore not to be taken in a limiting sense.

[0026] FIG. la illustrates a parallel combination of the hydraulic motors, according to an embodiment herein. With respect to FIG. la, the output shaft 101 of the plurality of hydraulic motors 102 are connected with the load shaft 103 in a parallel mannerism. The input 104 and output valves 105 of the plurality of hydraulic motors 102 are connected in parallel to a fluid supply conduit 106 and a fluid outlet conduit 107. The parallel connection allows a quick change in a rotational speed of the load shaft 103 and also offers sudden braking as the load shaft 103 is independently connected to each output shaft 101.

[0027] FIG. lb illustrates a series combination of hydraulic motors, according to an embodiment herein. With respect to FIG. lb, the output shaft 101 of the plurality of hydraulic motors 102 are connected with each other or coupled with each other and with the load shaft 103 in a series mannerism. The input 104 and output valves 105 of the plurality of hydraulic motors 102 are connected in parallel to a fluid supply conduit 106 and a fluid outlet conduit 107. The series combination allows a smooth variation in a rotation speed of the load shaft 103 during an acceleration and braking.

[0028] FIG. 2 illustrates an implementation of hydraulic motor in driving a load, according to an embodiment herein. With respect FIG. 2, a gears (204 and 206) of the output shaft is connected to a gear 208 of the load shaft in such a way that when the output shafts of the hydraulic motors 201 and 202 rotate in a clockwise direction, the gear 204 and 206 moves in a rightward direction while during an anti-clockwise motion, they move in a leftward direction. The translation of the gears 204 and 206 is put in an equilibrium by the placement of the springs in sideways. A fluid flow in a chamber of the hydraulic motor is depicted by 207 (top view) and 208 (lateral view).

[0029] FIG. 3 illustrates an implementation of the hydraulic motor in conjunction with a hydraulic pump in a wheel rotation, according to an embodiment herein. With respect to FIG. 3, the hydraulic pump transfer a fluid at high pressure and flow rate to the individual hydraulic motors 202 which are further connected to an individual wheels. Thus an opening and closing of the inlet and outlet valves controls a rotational speed of individual wheels.

[0030] The said system with various combinations of the hydraulic motors allows to an efficient revolution speed and braking speed of a load shaft, thus allowing a user to smoothly translate a speed.

[0031] It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the claims.

Claims

CLAIMS: I claim:

1. A system for moving a load through a plurality of hydraulic pumps comprising:

a plurality of hydraulic motors, wherein each hydraulic motor comprises:

a fluid chamber, wherein the fluid chamber comprises a piston having its movement due to a fluid flow inside the fluid chamber;

an input valve, wherein the input valve in each hydraulic motor control an intake fluid flow;

an output valve, wherein the output valve is placed at a displaced position with respect to the input valve on the fluid chamber;

an output shaft, wherein the output shaft is connected to the piston in the fluid chamber; wherein, the input and output valves of the plurality of hydraulic are connected to a fluid supply conduit in either a series mannerism or a parallel mannerism;

a plurality of hydraulic pumps, wherein the plurality of hydraulic pumps are connected to the plurality of hydraulic motors through one or more fluid conduits;

a load shaft, wherein the load shaft is connected to the output shaft of the hydraulic motors, wherein the output shafts of the plurality of hydraulic motors are connected to the load shaft in a series mannerism or a parallel mannerism.

2. The system according to claim 1, wherein the output valve is closed to apply a braking effect on the output shaft, wherein a force of braking is directly proportional to the number of the output valves closed.

3. The system as claimed in claim 1, wherein the speed of revolution of the output shaft is directly proportional to number of the open input valves.

4. The system according to claim 1, wherein the input and output valves of the plurality of hydraulic motors are connected in series and also the output shaft of the plurality of hydraulic shafts are connected in series with each other.

5. The system according to claim 1, wherein the input and output valves of the plurality of hydraulic motors are connected in series and also the output shaft of the plurality of hydraulic shafts are connected in parallel with each other.

6. The system according to claim 1, wherein the input and output valves of the plurality of hydraulic motors are connected in parallel and also the output shaft of the plurality of hydraulic shafts are connected in series with each other.

7. The system according to claim 1, wherein the input and output valves of the plurality of hydraulic motors are connected in parallel and also the output shaft of the plurality of hydraulic shafts are connected in parallel with each other.

8. The system as claimed in claim 1, wherein an output shaft of each hydraulic motor is independently connected to a load shaft.