CN101164719A - Numerically-controlled forging hydraulic press capable of realizing reactive power compensation - Google Patents

Numerically-controlled forging hydraulic press capable of realizing reactive power compensation Download PDF

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Publication number
CN101164719A
CN101164719A CNA2006100161742A CN200610016174A CN101164719A CN 101164719 A CN101164719 A CN 101164719A CN A2006100161742 A CNA2006100161742 A CN A2006100161742A CN 200610016174 A CN200610016174 A CN 200610016174A CN 101164719 A CN101164719 A CN 101164719A
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CN
China
Prior art keywords
reactive power
hydraulic press
numerically
contactor
compensator
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Pending
Application number
CNA2006100161742A
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Chinese (zh)
Inventor
杨苍
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Tianjin Tianduan Press Co Ltd
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Tianjin Tianduan Press Co Ltd
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Priority to CNA2006100161742A priority Critical patent/CN101164719A/en
Publication of CN101164719A publication Critical patent/CN101164719A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The present invention relates to a numerically-controlled forging hydraulic press capable of implementing reactive power compensation, belonging to the field of hydraulic press technology. It includes the following several portions: hydraulic press machine frame, movable transverse beam, working table, display, electric controller and power mechanism. The electric controller can be used for controlling power mechanism to drive hydraulic press machine frame and movable transverse beam, the electric controller is connected with display. It is characterized by that the hydraulic press possesses a reactive power compensator and a reactive power compensation controller. The structure of said reactive power compensator is a three-phase power supply main circuit capable of making the compensation capacitance be connected into the oil pump motor by means of contactor, the reactive power compensation controller is connected with the control contactor.

Description

Can realize the numerically-controlled forging hydraulic press of reactive power compensation
Technical field
The invention belongs to the hydraulic press technical field, particularly relate to a kind of numerically-controlled forging hydraulic press of realizing reactive power compensation.
Background technology
At present, hydraulic press equipment is widely used in manufacturing every field as a kind of basic process equipment: industrial circles such as automobile, space flight, powder.Wherein hydraulic forging press is a new hydraulic press series that grew up gradually in recent years in numerous hydraulic press series.
Hydraulic forging press is generally the steel ingot titanium alloy etc materials because of the workpiece of processing, adding all needs stock heating earlier man-hour, temperature is generally 900--1200 ℃, to reduce the resistance to deformation resistance of material, therefore require the downstream rate of slide block fast as much as possible, avoid workpiece temperature to reduce, be difficult for being shaped, produce waste product.The complete machine general power of hydraulic forging press is all bigger, and can 1800KW-2400KW belongs to large-scale current consuming apparatus, be fully used for electrical network, plays an important role.
The basic load of hydraulic forging press is a motor, is inductive load, needs electrical network to provide corresponding reactive power to equipment in the course of the work, increase the capacity of distribution transformer, increase the transmission of electric energy loss, cause energy waste, also increased the operating cost of electrical network simultaneously.
Summary of the invention
The present invention provides a kind of numerically-controlled forging hydraulic press of realizing reactive power compensation for solving the problem that prior art exists.
The objective of the invention is to increase capacitive compensator, improve the power factor of numerically-controlled forging hydraulic press, solve the problem of energy waste and increase cost.
Can realize the numerically-controlled forging hydraulic press of reactive power compensation, form by hydraulic pressure frame, moved cross beam, workbench, electric controller.Pressure, position, hydraulic press temperature height, oil circuit obstruction, all places switching signal have been installed on the hydraulic press.Hydraulic press is equipped with reactive power compensator and reactive power compensating controller.Reactive power compensating controller is the brain of bucking-out system, controls the power factor of hydraulic press by it, decides the capacity of the compensator compensates electric capacity of system's input according to the desired value of actual power factor and power factor.
The present invention adopts following technical scheme:
Can realize the numerically-controlled forging hydraulic press of reactive power compensation, comprise hydraulic pressure frame, moved cross beam, workbench, display, electric controller and actuating unit, electric controller control actuating unit drives hydraulic pressure frame, moved cross beam, electric controller connects display, be characterized in: hydraulic press is equipped with reactive power compensator and reactive power compensating controller, to be contactor insert the three phase mains major loop of oil pump motor with building-out capacitor to the structure of reactive power compensator, and reactive power compensating controller connects control contactor.
The present invention can also adopt following technical measures:
The described numerically-controlled forging hydraulic press of realizing reactive power compensation, be characterized in: reactive power compensator is the 1-10 group, reactive power compensating controller connects the contactor of control reactive power compensator, realizes one group of reactive power compensator, organizes more or all connect.
The described numerically-controlled forging hydraulic press of realizing reactive power compensation is characterized in: the contactor of reactive power compensator comprises knife-like switch and A.C. contactor, and reactive power compensating controller connects the control A.C. contactor.
The described numerically-controlled forging hydraulic press of realizing reactive power compensation is characterized in: reactive power compensating controller connects the current transformer that detects the oil pump motor operating current.
The described numerically-controlled forging hydraulic press of realizing reactive power compensation is characterized in: reactive power compensator is equipped with overload protection element electrothermal relay.
The described numerically-controlled forging hydraulic press of realizing reactive power compensation is characterized in: reactive power compensator is equipped with the short circuit protection component fuse.
The described numerically-controlled forging hydraulic press of realizing reactive power compensation, be characterized in: reactive power compensator is equipped with arrester.
Advantage that the present invention has and good effect:
Can realize the numerically-controlled forging hydraulic press of reactive power compensation, rely on capacitive compensator, realized reactive power compensation, improved the power factor of numerically-controlled forging hydraulic press, the active power loss that has reduced transmission and distributed reactive power to cause, can solve the energy waste problem, reduce electricity charge expenditure production cost.Adopting reactive-load compensation is a conservation measures that requires less investment while yielding quicker results.The parallel capacitor principle is simple, easy to use, economical operation, reduced investment, can divide into groups to drop into, and guarantees rate of qualified voltage and rational power factor.The present invention adopts compensation condenser reasonably to compensate, and the large-sized numerical control hydraulic forging press is had remarkable economic efficiency.
Description of drawings
Fig. 1 is a capacitive compensator structural representation of the present invention;
Fig. 2 is capacitive compensator of the present invention and control loop schematic diagram;
Fig. 3 is a reactive power compensator cabinet schematic diagram of the present invention.
Wherein, 1-knife-like switch, 2-current transformer, 3-ammeter, 4-arrester, 5-fuse, 6-A.C. contactor, 7-electrothermal relay, 8-building-out capacitor, 9-reactive power compensator cabinet, 10-reactive power compensating controller, 11-indicator lamp.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, also be elaborated as follows in conjunction with the accompanying drawings especially exemplified by following example:
Embodiment 1
With reference to accompanying drawing 1, Fig. 2 and Fig. 3.
Can realize the numerically-controlled forging hydraulic press of reactive power compensation, comprise hydraulic pressure frame, moved cross beam, workbench, display, electric controller and actuating unit, electric controller control actuating unit drives hydraulic pressure frame, moved cross beam, and electric controller connects display.Hydraulic press is equipped with reactive power compensator and reactive power compensating controller, the structure of reactive power compensator is inserted building-out capacitor 8 by knife-like switch 1 and A.C. contactor 6 the three phase mains major loop of oil pump motor, reactive power compensator has 10 groups, reactive power compensating controller connects the A.C. contactor of control reactive power compensator, realizes one group of reactive power compensator, organizes more or all connect.Reactive power compensating controller connects the current transformer 2 that detects the oil pump motor operating current, and current transformer is equipped with ammeter 3.Reactive power compensator is equipped with overload protection element electrothermal relay 7, short circuit protection component fuse 5 and arrester 4.
The reactive power compensation capacity is with reference to following table:
The compensation capacity of the required compensation condenser of 1KW active power
Can obtain power factor according to form and compensate to 0.95 by 0.89, every KW active power needs 0.18Kvar, the total active power of THP10-35000/580 is 200KW * 11=2200KW, then the reactive power of required compensation is 0.18 * 2200=396Kvar, therefore, the decision compensation capacity is 400Kvar.Be arranged in two reactive power compensator cabinets 9, compensation capacity is 200Kvar in the cabinet.Reactive power compensating controller 10 is brains of bucking-out system, control the power factor of hydraulic press by it, decide the capacity of the building-out capacitor that system drops into according to the desired value of actual power factor and power factor, also can observe the power factor of electrical system simultaneously at any time by the charactron on its panel.At any time observe the quantity that drops into capacitor for ease of the user, on reactive power compensator cabinet 9, be provided with indicator lamp 11.
When hydraulic press preparation, push the electric motor starting button on the regulator cubicle, running has been installed on the oil pump motor on the hydraulic press power station, oil pump motor is connected in the electric motor starting group by cable, detect the real work current value of hydraulic press by current transformer, and offer the power back-off controller, be sampling current Ia-In, again in conjunction with sampled voltage U2-V2, calculate the actual power factor of numerically controlled hydraulic press, compare with desired value default in compensating controller then, decide the group number of the building-out capacitor of switching.When the workpiece that will suppress needs the hydraulic press rate of load condensate lower, the quantity of oil pump motor that promptly participates in work is fewer, promptly need the free power ratio that compensates less, reactive power compensating controller will reduce the quantity of the building-out capacitor group of devoting oneself to work, and send the minimizing signal.Be to have several off-states that are among the control relay 1-10, avoid occurring the overcompensation situation.Otherwise then increase the quantity of building-out capacitor group.
When numerically-controlled forging hydraulic press enters duty, at first drop into knife-like switch 8, connect three phase mains, the power back-off controller is connected the control relay of respective numbers according to the power factor of numerically-controlled forging hydraulic press, after control relay was connected, the A.C. contactor of its control corresponding building-out capacitor group got electronic work, and A.C. contactor has been installed in the building-out capacitor cabinet, the building-out capacitor group is inserted major loop, for numerically controlled hydraulic press provides reactive power.
Reactive power compensator is equipped with overload protection element electrothermal relay 7, in case capacitor itself breaks down, surpasses permission protection value, and its protection contact will be opened, and avoids the further expanded scope of fault.Arrester 4 plays lightning protection function.Fuse 5 is a short circuit protection component, and when in a single day directly overlap joint takes place between the phase line circuit, the fuse in the fuse 5 will fuse, and plays the effect of other electric elements of holding circuit.

Claims (7)

1. can realize the numerically-controlled forging hydraulic press of reactive power compensation, comprise hydraulic pressure frame, moved cross beam, workbench, display, electric controller and actuating unit, electric controller control actuating unit drives hydraulic pressure frame, moved cross beam, electric controller connects display, it is characterized in that: hydraulic press is equipped with reactive power compensator and reactive power compensating controller, to be contactor insert the three phase mains major loop of oil pump motor with building-out capacitor to the structure of reactive power compensator, and reactive power compensating controller connects control contactor.
2. the numerically-controlled forging hydraulic press of realizing reactive power compensation according to claim 1, it is characterized in that: reactive power compensator is the 1-10 group, reactive power compensating controller connects the contactor of control reactive power compensator, realizes one group of reactive power compensator, organizes more or all connect.
3. the numerically-controlled forging hydraulic press of realizing reactive power compensation according to claim 1 is characterized in that: the contactor of reactive power compensator comprises knife-like switch and A.C. contactor, and reactive power compensating controller connects the control A.C. contactor.
4. the numerically-controlled forging hydraulic press of realizing reactive power compensation according to claim 1 is characterized in that: reactive power compensating controller connects the current transformer that detects the oil pump motor operating current.
5. the numerically-controlled forging hydraulic press of realizing reactive power compensation according to claim 1 is characterized in that: reactive power compensator is equipped with overload protection element electrothermal relay.
6. the numerically-controlled forging hydraulic press of realizing reactive power compensation according to claim 1 is characterized in that: reactive power compensator is equipped with the short circuit protection component fuse.
7. the numerically-controlled forging hydraulic press of realizing reactive power compensation according to claim 1, it is characterized in that: reactive power compensator is equipped with arrester.
CNA2006100161742A 2006-10-19 2006-10-19 Numerically-controlled forging hydraulic press capable of realizing reactive power compensation Pending CN101164719A (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104183379A (en) * 2014-08-07 2014-12-03 国家电网公司 Connecting device for maintenance of secondary side of electric power current transformer
CN104808085A (en) * 2015-04-21 2015-07-29 诸暨市东白电力设备制造有限公司 Low-voltage reactive compensation overvoltage protection test circuit and overvoltage protection test method
CN105215251A (en) * 2014-06-20 2016-01-06 天津市天锻压力机有限公司 Hydraulic forging press pull bar electric-heating control system
CN105268890A (en) * 2014-06-20 2016-01-27 天津市天锻压力机有限公司 Pull rod heating pre-tightening electrical system of isothermal hydraulic forging press
CN106862455A (en) * 2017-02-03 2017-06-20 清华大学 Have the heavy difunctional press Moving beam balance control loop of backhaul and loading function concurrently

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105215251A (en) * 2014-06-20 2016-01-06 天津市天锻压力机有限公司 Hydraulic forging press pull bar electric-heating control system
CN105268890A (en) * 2014-06-20 2016-01-27 天津市天锻压力机有限公司 Pull rod heating pre-tightening electrical system of isothermal hydraulic forging press
CN104183379A (en) * 2014-08-07 2014-12-03 国家电网公司 Connecting device for maintenance of secondary side of electric power current transformer
CN104808085A (en) * 2015-04-21 2015-07-29 诸暨市东白电力设备制造有限公司 Low-voltage reactive compensation overvoltage protection test circuit and overvoltage protection test method
CN106862455A (en) * 2017-02-03 2017-06-20 清华大学 Have the heavy difunctional press Moving beam balance control loop of backhaul and loading function concurrently

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Open date: 20080423