Frequency-varying driving elevator hydraulic control system

A hydraulic control system and variable frequency drive technology, applied in elevators, transportation and packaging, etc., can solve the problems of not fully utilizing the energy saving effect of the variable frequency speed regulation system, high energy consumption, and complex structure of the integrated control valve block.

Inactive Publication Date: 2003-08-20
SHANGHAI MITSUBISHI ELEVATOR CO LTD
View PDF1 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead to low system efficiency and high energy consumption;
[0005] 2) The starting current is large, which has a serious impact on the power grid;
[0006] 3) The temperature rise of the oil quickly leads to the need to use an expensive cooling system to reduce the temperature rise during frequent operation
[0009] 4) The structure of the integrated control v

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Frequency-varying driving elevator hydraulic control system
  • Frequency-varying driving elevator hydraulic control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] see figure 1 As shown in the figure, the motor 3 is rigidly connected coaxially with the hydraulic pump / motor 2 through the coupling 27, and the pump / motor 2 is connected to the hydraulic control check valve 14 through the pipeline 29, the pressure pulsation suppressor 10, and the pipeline 11 , the hydraulic control check valve 14 is connected to the pipeline 33 through the pipeline 34 , the pipeline 33 is connected to the speed limiting shut-off valve 15 , and the speed limiting shut-off valve 15 is connected to the plunger cylinder 7 through the pipeline 35 . The circuit safety valve 13 is connected to the pipeline 29 through the pipeline 31 to ensure the safety of the oil outlet / inlet pressure of the pump / motor. The pressure sensor 20 is connected to the pipeline 34 to detect the pressure of the oil outlet of the pump / motor 2 . The hand pump 16 is connected to the hydraulic cylinder 7 through pipelines 34 , 33 , 35 .

[0059] The working principle of the car speed ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention provides one effective way for solving the problems of power consumption and temperature raise in valve controlled hydraulic elevator. In the frequency-varying driving hydraulic elevator, voltage-varying and frequency-varying technology is used to control the rotation speed of triphase AC asynchronous motor and thus the output flow rate of the rationing hydraulic pump and the upwards running speed of cage jacked by hydraulic plunger cylinder; or braking moment is provided to control the rotation of the rotioning hydraulic motor and thus the downwards cage speed. The frequency-varying speed-regulating hydraulic control system can lower greatly the elevator power consumption. When frequency converter with feedback function or similar feedback device is used, energy may be fed back to power network for saving power and reaching stable braking.

Description

technical field [0001] The utility model relates to a variable frequency drive elevator liquid control system, which belongs to the field of elevator manufacturing. Background technique [0002] From the creation of hydraulic elevators to the present, it has experienced the development of valve-controlled hydraulic systems to frequency conversion controlled hydraulic systems. The valve-controlled throttling speed regulation system is the most mature technology and the most widely used in the current elevator hydraulic control system. It mainly uses the throttling speed regulation technology in hydraulic technology to control the running speed of hydraulic elevators. Its biggest advantage is that the system is simple. , easy to control. However, the essential characteristics of its ascending bypass throttling load adaptation, self-weight descending energy converted into heat energy loss determine its following defects: [0003] 1) The overflow loss of the throttling speed r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B66B1/00
Inventor 朱思中杨华勇徐兵万忠培王兴琪
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap