Hydraulic unit with loading and unloading control

Abstract

The invention relates to a hydraulic unit (100) comprising an electric motor (103) that is positioned inside the cabin (101) to produce the power needed to form the pressure in the hydraulic unit (100) for use in all devices, which test the mechanical strength of materials (compression, tensile, bending etc) for the loading and unloading control of sensitive cylinders in every field where the hydraulic piston is used. The innovation is that it controls the discharge in hydraulic loadings and therefore it comprises a valve block (107) consisting of valves comprising the discharge control system so that the hydraulic infrastructure can be controlled by loading and unloading in a closed circuit cycle logic, a controller (117) that operates with a closed circuit cycle logic and controls the speed of the electric motor (103) according to the measurement information coming from the measurement sensor located on the piston, for both loading and unloading controlled loadings, a control measurement algorithm (118) that processes the information transmitted to the controller (117) to automatically control the rotation speed of the electric motor (103) and provide the required flow rate and pressure amount.

Description

[0001] HYDRAULIC UNIT WITH LOADING AND UNLOADING CONTROL

[0002] Technical Field

[0003] The invention relates to a hydraulic unit that can be adapted to all devices that test the mechanical strength of materials (compression, tensile, bending, etc.) for the loading and unloading control of sensitive cylinders in every field where the hydraulic piston is used.

[0004] The invention particularly relates to a hydraulic unit that allows precise loading, developed to control both loading and unloading of single-acting hydraulic pistons at low cost in general use systems.

[0005] State of the Art

[0006] Hydraulic piston is a system element that enables mechanical movement by using fluid pressure. It is usually cylindrical in shape and has a moving piston inside. Pistons used in hydraulic systems generally use liquids such as oil or water. The pressure applied by the liquid on the piston enables the piston to push or pull movement. Hydraulic cylinders are generally single or double acting. This means that oil under pressure can be applied to both sides of the piston to provide movement in both directions. Single-acting cylinders are sometimes used where the weight of the load is used to return the cylinder to the closed position.

[0007] Simultaneous loading and unloading control in single-acting hydraulic pistons is a method used to control the movement of the piston. Simultaneous loading and unloading control allows each piston to be loaded or unloaded simultaneously. This ensures that each piston produces an equal amount of force and that other components in the system operate in a more balanced manner.

[0008] Servo valves are used to control simultaneous loading and unloading of hydraulic pistons. These valves regulate hydraulic flow and pressure to control both loading and unloading of the piston. Simultaneous loading and unloading control is a technique frequently used in industrial applications. Loading and simultaneous unloading control cannot be performed, especially in sensitive cylinders.

[0009] Today, while hydraulic pistons, especially single-acting ones, allow loading control, they do not have simultaneous unloading control and do not allow precise loading. Simultaneous loading and unloading control of hydraulic pistons can be controlled by means of servo valves as high cost. As a result, the existence of the need for a hydraulic unit with loading and unloading control that eliminates the disadvantages of the present art and the inadequacy of existing solutions have made it necessary to make a development in the relevant technical field.

[0010] Brief Description of The Invention

[0011] The present invention relates to a hydraulic unit that meets the above-mentioned requirements, eliminates all disadvantages and brings some additional advantages and can be adapted to all devices that test the mechanical strength of materials (compressive, tensile, bending etc.) for the loading and unloading control of sensitive cylinders in every field where the hydraulic piston is used.

[0012] Based on the known state of the art, the aim of the invention is to adapt the developed hydraulic unit to all devices that test the mechanical strength of materials by means of the fact that it is a complete system consisting of a hydraulic valve, electronic control unit and closed-loop software, and to provide simultaneous loading and unloading control of hydraulic pistons.

[0013] The aim of the invention is to provide loading and simultaneous unloading without a servo valve, compared to traditional systems with only loading control by means of the special valve group it contains.

[0014] Another aim of the invention is to provide automatic control according to the data coming from the force sensor during loading by means of the electronic control unit.

[0015] Another aim of the invention is to protect the sensitive valve group from small particles and pollution by means of the pressure line filter.

[0016] Another object of the invention is to control the discharge in the system in hydraulic loading compared to traditional systems by means of the valve block consisting of valves comprising the discharge control system, thus ensuring the loading and unloading control of the hydraulic infrastructure in a closed circuit cycle logic.

[0017] The structural and characteristic features and all the advantages of the invention will be understood more clearly by means of the drawings given below and the detailed description written with references to these drawings, therefore the evaluation needs to be made by taking these drawings and detailed descriptions into consideration. Brief Description of Drawings

[0018] In order to best understand the structure of the present invention and its advantages with additional elements, it needs to be evaluated together with the drawings described below.

[0019] Figure-1 is a schematic general view of the hydraulic unit,

[0020] Figure-2 is a schematic general view of the cross-section of the hydraulic unit,

[0021] Figure-3 is a schematic general view of the interior of the hydraulic unit.

[0022] Reference Numbers

[0023] 100. Hydraulic unit

[0024] 101. Cabin

[0025] 102. Lid

[0026] 103. Electric motor

[0027] 104. Gear pump

[0028] 105. Coupling drum

[0029] 106. Radial pump

[0030] 107. Valve block

[0031] 108. Pressure safety valve

[0032] 109. Check valve

[0033] 110. Directional control valve

[0034] 111 . Oil level indicator

[0035] 112. Pressure line filter

[0036] 114. Emergency stop button

[0037] 115. Speed control

[0038] 116. Oil tank

[0039] 117. Controller

[0040] 118. Control Measurement Algorithm

[0041] Detailed Description of The Invention

[0042] In this detailed description, the hydraulic unit (100) that can be adapted to all devices, which test the mechanical strength (compression, tensile, bending etc.) of materials for the loading and unloading control of sensitive cylinders in every field where the hydraulic piston of the invention is used, is described only as an example for a better understanding of the subject and in a way that does not form any limiting effect.

[0043] The hydraulic unit (100) shown in Figure-1 is a complete system and comprises a valve block (107), an electronic controller (117) and a closed circuit cycle software. A special valve block (107) is designed in said hydraulic unit (100) and provides loading and simultaneous unloading without a servo valve, compared to traditional systems with only loading control. The outer part of said hydraulic unit (100) is closed with the cabin (101). On the upper part of said cabin (101), there is an emergency stop button (114) to be used in case of any emergency that requires the system to be stopped suddenly; a speed control (115) for slowing down and accelerating the speed of the electric motor (103); a controller (117) comprises an automatic controller and its indicator, which works with a closed circuit cycle logic and is used for automatic control according to the data coming from the pressure sensor during loading. The electric motor (103) shown in Figure-2 is positioned inside the cabin (101) to produce the power needed to form the pressure in the hydraulic unit (100). A gear pump (104) is positioned at the bottom of the cabin (101 ) to provide the flow rate required for the movement of the cylinder or actuator to be connected to said hydraulic unit (100). A radial pump (106) is positioned at the top of the gear pump (104) for faster movement without a force against the cylinder or actuator connected to the hydraulic unit (100). In order to adapt said electric motor (103) and the radial pump (106), a coupling drum (105) is positioned between them. A check valve (109) is positioned in connection with the gear pump (104) to prevent the return of the pressurized fluid and to ensure one-way operation. Directional control valve (110) is connected to the check valve (109) for the pressurized fluid to change direction (pass between pistons). In the hydraulic unit (100) shown in Figure-3, a lid (102) is used to easily access the electronic control unit and electrical panel. The valve block (107), which comprises valves comprising the discharge control system in the hydraulic unit (100), allows the discharge to be controlled in the system during hydraulic loading compared to traditional systems, thus, the hydraulic infrastructure can be controlled by loading and unloading in a closed circuit cycle logic. For safety purposes, a pressure safety valve (108) is used to prevent the hydraulic unit (100) from reaching a higher pressure than the targeted maximum pressure. At the bottom of said hydraulic unit (100), the oil tank (116) is positioned in the cabin (101) to store the oil. There is an oil level indicator (111) to show the current oil level in said oil tank (116). A pressure line filter (112) is positioned between the electric motor (103) and the valve block (107) to protect the sensitive valve group from small particles and impurities.

[0044] The gear pump (104) and radial pump (106) connected to the electric motor (103) in the hydraulic unit (100) produce pressure and planned flow rate by the rotation of the electric motor (103). This pressurized oil is conveyed to the piston through the check valve (109) and pressure line filter (112). Controlled discharge of oil is achieved by means of a dimmer valve preferably added to the hydraulic unit (100) after the pressure line filter (112). The measurement information coming from the measurement sensor located on the piston is transmitted to the controller (117) located in the hydraulic unit (100) working with a closed circuit cycle logic. This incoming information is processed through the control measurement algorithm (118), which processes the information transmitted to the controller (117) to provide the required flow rate and pressure amount by automatically controlling the rotation speed of the electric motor (103) and providing the required flow rate and pressure amount. In the hydraulic unit (100), the closed circuit cycle controller (117) controls the speed of the electric motor (103) according to the information coming from the sensor more than once per second, allowing for both loading and unloading controlled loadings.

Claims

CLAIMS1. A hydraulic unit (100) comprising an electric motor (103) that is positioned inside a cabin (101 ) to produce the power needed to form the pressure in the hydraulic unit (100) for use in all devices, which test the mechanical strength (compression, tensile, bending etc.) of materials for the loading and unloading control of sensitive cylinders in every field where the hydraulic piston is used, characterized by comprising:- A valve block (107) comprises valves comprising the discharge control system to control the discharge in hydraulic loading and thus to control the loading and unloading of the hydraulic infrastructure in a closed circuit cycle logic;- A controller (117) that operates with a closed circuit cycle logic and controls the speed of the electric motor (103) according to the measurement information coming from the measurement sensor located on the piston, for both loading and unloading controlled loadings;- A control measurement algorithm (118) that processes the information transmitted to the controller (117) to automatically control the rotation speed of the electric motor (103) and provide the required flow rate and pressure amount.

2. A hydraulic unit (100) according to claim 1 , characterized by comprising; a gear pump(104) connected to the electric motor (103) to produce pressure and planned flow rate as the electric motor (103) rotates.

3. A hydraulic unit (100) according to claim 1 , characterized by comprising; a radial pump (106) connected to the electric motor (103) to produce pressure and planned flow rate as the electric motor (103) rotates.

4. A hydraulic unit (100) according to claim 1 , characterized by comprising; a check valve (109) through which pressurized oil is transmitted to the piston.

5. A hydraulic unit (100) according to claim 1 , characterized by comprising; a coupling drum(105) positioned between the electric motor (103) and the radial pump (106) for adaptation to each other.

6. A hydraulic unit (100) according to claim 1 , characterized by comprising; the check valve (109) connected to the gear pump (104) to prevent the return of the fluid and ensure oneway operation.

7. A hydraulic unit (100) according to claim 1 , characterized by comprising; a directional control valve (110) connected to the check valve (109) to change the direction of the pressurized fluid.

8. A hydraulic unit (100) according to claim 1 , characterized by comprising; a pressure safety valve (108) to prevent the hydraulic unit (100) from reaching a higher pressure than the targeted maximum pressure for safety purposes.

9. A hydraulic unit (100) according to claim 1 , characterized by comprising; a pressure line filter (112) positioned between the electric motor (103) and the valve block (107) to protect the sensitive valve group from small particles and impurities.

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