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Self-contained energy efficient hydraulic actuator system

A hydraulic actuator and hydraulic cylinder technology, applied in fluid pressure actuators, accumulator devices, energy industry, etc., can solve the problems of limiting the frequency response of actuators, positioning accuracy and repeatability, etc., and achieve operation The effect of minimizing time and optimizing performance

Inactive Publication Date: 2017-08-01
MEA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Another major disadvantage is that the prime mover and pump run frequently and in some applications continuously to compensate for the servo valve leak rate
This greatly limits the frequency response of the actuator as well as the positioning accuracy and repeatability

Method used

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  • Self-contained energy efficient hydraulic actuator system
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Examples

Experimental program
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Effect test

example 1

[0074] Example 1: Power usage in watts of an actuator system based on the invention;

[0075] (1.5 hp / 0.85 efficiency) x (745 watts / hp) = 1,314 watts

[0076] (1,314 watts)×(365 days)×(24 hours) / 1000=11,510kWh

[0077] 11,510kWh / 50%= 5,755 kWh / year .

example 2

[0078] Example 2: Power usage in watts based on the actuator system disclosed in Published U.S. Patent Application No. 2007 / 0101711;

[0079] (1.5 hp / 0.80 efficiency) x (745 watts / hp) = 1,396 watts

[0080] (1,396 watts) x (365 days) x (24 hours) / 1000 (0.5 run time) = 6,114kWh

[0081] +(1.5 horsepower / 0.75 efficiency)×(745w / horsepower)×((365 days)×(24 hours) / 1000)×(0.5 off time)

[0082] = 12,640 kWh / year .

example 3

[0083] Example 3: Power usage in watts based on the actuator system presented in US Patent No. 7,640,736;

[0084] (1.5 hp / 0.80 efficiency) x (745 watts / hp) = 1,396 watts

[0085] ((1,396 watts) × (365 days) × (24 hours)) / (1000 × (0.5 operating hours)) = 6,114kWh

[0086] +((1.5 hp / 0.70 efficiency)×(745 watts / hp)×((365 days)×(24 hours)) / 1000)×(0.5 off time)= 13,106kWh / year .

[0087] Examples understood to be used for real energy consumption comparisons have been prepared, the data originating from real installations with comparable conditions. However, the actuator system of the present invention provides high efficiency by shutting down the motor when the actuator is not moving. As presented in Example 1, the power usage of the presently claimed actuator system provides significant energy savings over time. Notably, Example 1 provides over a 50% reduction in power usage during computation.

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Abstract

The self-contained energy efficient hydraulic actuator system of the present invention includes a hydraulic cylinder, a servo motor that is configured to produce rated torque from zero RPM to maximum rated RPM with rotor speed / position feedback to a servo motor, a pump, and a solenoid valve that enables the hydraulic cylinder to maintain its position without the motor running. The system has the ability to hold a load in place without motor operation via the use of the solenoid valve, and therefore saves energy and extends the motor lifetime by minimizing the motor running time.

Description

[0001] This application is based on and claims priority to U.S. Application Serial No. 14 / 511,463, filed October 10, 2014, entitled "Self-Contained Energy Efficient Hydraulic Actuator System," the entire contents of which Incorporated herein by reference. technical field [0002] The invention disclosed and taught herein relates generally to self-contained actuator systems, and in particular to self-contained energy-efficient hydraulic actuator systems. Background technique [0003] Actuators are mechanisms through which a control system acts on the environment. It is operated by a source of energy (usually electric current, electric motors, and hydraulic fluid pressure or pneumatic pressure that converts energy into motion). [0004] Hydraulic actuators generally consist of cylinders that use hydraulic power to facilitate the operation of machinery. Mechanical motion gives an output in terms of linear, rotary or oscillating motion. A hydraulic cylinder comprises a hollow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/01F15B13/044F15B15/18
CPCF15B2211/20561F15B2211/27F15B2211/30515F15B2211/3058F15B2211/31529F15B2211/633F15B2211/6336F15B2211/6651F15B2211/6653F15B1/265F15B7/006F15B2211/6656F15B2211/6658F15B2211/7054F15B2211/851F15B2211/853F15B11/003F15B15/18F15B2211/20515F15B2211/765F15B2211/88Y02P80/10F15B15/2815
Inventor M·V·切斯特
Owner MEA
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