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Intelligent load sensing hydraulic system of electric forklift

A technology of load sensing and electric forklifts, applied in fluid pressure actuation system components, fluid pressure actuation devices, lifting devices, etc., can solve the problem of low power efficiency of the hydraulic system, exhaust and noise pollution environment, and increased wear of friction pairs and other problems, to achieve the effects of high loop efficiency, improved reliability, and increased speed regulation range

Inactive Publication Date: 2015-05-20
阜新阜太泵业制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, forklifts are roughly divided into internal combustion forklifts and electric forklifts. Internal combustion forklifts are powered by engines. Short, there is a large overflow loss and throttling loss in the hydraulic system during work, which makes the power efficiency of the hydraulic system low, and requires a more complicated variable displacement mechanism; the requirements for the hydraulic oil medium are high, because the motor speed is fixed, When the flow rate is small, the hydraulic pump still operates at high speed, which intensifies the wear of the friction pair and increases the noise

Method used

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  • Intelligent load sensing hydraulic system of electric forklift
  • Intelligent load sensing hydraulic system of electric forklift

Examples

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Embodiment Construction

[0010] Examples, see attached figure 1 , the electric forklift intelligent load sensing hydraulic system is composed of seat 8 one-way output connected to solenoid valve two 9, solenoid valve two 9 and DC power supply 10 one-way output connected to pump controller inverter 7, lifting cylinder 1 one-way output Connect the solenoid valve one 2, the one-way output of the solenoid valve one two is connected to the multi-way valve 17, and the multi-way valve 17 is composed of a lift valve, an overload valve, a tilt valve and an oil return valve plate. The one-way output of the multi-way valve 17 is connected to the oil tank 14 and the lifting cylinder 1, the two-way output of the multi-way valve 17 is connected to the solenoid valve three 18, and the two-way output of the solenoid valve three 18 is connected to the tilt cylinder 11 and connected to the load feedback three 15. Solenoid valve 1 2 is connected to load feedback 1 4, load feedback 1 4 unidirectional output is connected ...

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Abstract

The invention belongs to hydraulic control devices and particularly relates to an intelligent load sensing hydraulic system of an electric forklift. The intelligent load sensing hydraulic system is composed of an inclined oil cylinder (11), a steering oil cylinder (19), a lifting oil cylinder (1), an oil tank, a seat (8), a first electromagnetic valve (2), a second electromagnetic valve (9), a third electromagnetic valve (18), a direct-current power source (10), a variable frequency motor (6), an oil pump (13), a load sensing steering mechanism (3), a coder (5), a pump controller inverter (7), first load feedback (4), second load feedback (12), third load feedback (15), a priority valve (16) and a multi-way valve (17). According to the intelligent load sensing hydraulic system of the electric forklift, throttling losses and overflow losses are avoided, the circuit efficiency of the hydraulic system is high, the energy-saving effect is obvious, the speed regulating range is enlarged, the speed regulating precision is improved, the service life of the whole hydraulic system is prolonged, the reliability of performance is improved, noise is lowered, and the working environment is facilitated.

Description

technical field [0001] The invention belongs to a hydraulic control device, in particular to an intelligent load sensing hydraulic system of an electric forklift. Background technique [0002] At present, forklifts are roughly divided into internal combustion forklifts and electric forklifts. Internal combustion forklifts are powered by engines. Short, there is a large overflow loss and throttling loss in the hydraulic system during work, which makes the power efficiency of the hydraulic system low, and requires a more complicated variable displacement mechanism; the requirements for the hydraulic oil medium are high, because the motor speed is fixed, When the flow rate is small, the hydraulic pump still operates at high speed, which intensifies the wear of the friction pair and increases the noise. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned technical deficiencies, and provide an intelligent load sensing hydra...

Claims

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Application Information

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IPC IPC(8): B66F9/22B66F9/06F15B11/02
CPCB66F9/07568B66F9/22F15B13/06F15B13/16F15B21/08
Inventor 程艳茹
Owner 阜新阜太泵业制造有限公司
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