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53 results about "Displacement ratio" patented technology

The displacement–length ratio (DLR or D/L ratio) is a calculation used to express how heavy a boat is relative to its waterline length.

Image formation apparatus and process cartridge for image formation apparatus

An image formation apparatus comprising at least a moving body to be charged, a charging device for charging the body to be charged using discharge caused by applying a voltage to a charging member provided in contact with or proximity to the body to be charged, a latent image formation device for forming a latent image on a surface of the body to be charged which is charged by the charging device, and a development device for depositing toner on an image portion of the latent image formed by the latent image formation device, wherein an elastic displacement ratio τe for the surface of the body to be charged is equal to or greater than 40% which is defined by the following formula, elastic displacement ratio τe(%)=[(maximum displacement)−(plastic displacement)] / (maximum displacement)×100, and the image formation apparatus further comprises a protective material feeding device for depositing a protective material on at least a discharge area of the surface of the body to be charged.
Owner:RICOH KK

Image formation apparatus having a body to be charged with specified properties and including the use of a protective material

An image formation apparatus including at least a moving body to be charged, a charging device for charging the body to be charged using discharge caused by applying a voltage to a charging member provided in contact with or proximity to the body to be charged, a latent image formation device for forming a latent image on a surface of the body to be charged which is charged by the charging device, and a development device for depositing toner on an image portion of the latent image formed by the latent image formation device, wherein an elastic displacement ratio τe for the surface of the body to be charged is equal to or greater than 40% which is defined by the following formula,elastic displacement ratio τe (%)=[(maximum displacement)-(plastic displacement)] / (maximum displacement)×100,and the image formation apparatus further includes a protective material feeding device for depositing a protective material on at least a discharge area of the surface of the body to be charged.
Owner:RICOH KK

Multistage Compressor

A multistage compressor employing a gas injection system for CO2 cycle that attains enhancements of compression efficiency and compression performance. The multistage compressor is multistage compressor (2) for CO2 cycle (1) adapted to carry out two-stage compression involving emitting the CO2 refrigerant gas compressed by inferior-stage side rotary compression means (4) into sealed housing (3) and having the intermediate-pressure refrigerant gas within the sealed housing (3) suctioned by superior-stage side scroll compression means (5), wherein to the sealed housing (3), there is connected gas injection circuit (15) capable of injection of intermediate-pressure CO2 refrigerant gas extracted from a refrigerant circuit into the sealed housing (3), and wherein the inferior-stage side rotary compression means (4) and the superior-stage side scroll compression means (5) are approximately identical with each other in pressure ratio and approximately equivalent with each other in displacement ratio.
Owner:MITSUBISHI HEAVY IND LTD

Infinitely variable gear transmission with parallel hydraulic ratio control

Two parallel planetary gear sets with a common sun gear output are geared to a hydraulic pump and motor system. Input is applied to both planetary gear sets in parallel. Output is from both planetary gear sets in parallel. Two planetary gear set members, one in each set, are geared to the pump and motor and are used to control the ratio of the infinitely variable gear transmission (IVGT). The displacement ratio of the pump and motor, connected to these two members, controls the ratio of the IVGT.
Owner:MARSHA JOHN DAVID

Method for realizing synchronous PTP motion in robots and device thereof

ActiveCN103853043AExercise time is strictly consistentSmall amount of calculationAdaptive controlComputer scienceDisplacement ratio
The invention discloses a method for realizing synchronous PTP motion in robots and a device thereof. The method comprises the following steps: an axis with the longest run duration in the n-axis robot is selected as the reference axis according to maximum condition of preset dynamic characteristic physical quantities of each axis in a robot; the actual maximum acceleration of the reference axis is determined; velocity planning of the reference axis is determined according to the actual maximum acceleration of the reference axis; and velocity planning of residual axis in the robot is determined according to displacement ratio. By the above mode, synchronous PTP planning can be completed with the smallest calculated quantity, and strict consistency of run duration of each axis in the robot is guaranteed.
Owner:PEITIAN ROBOTICS CO LTD

Automatic testing method for key parameters of MEMS gyroscope structure

ActiveCN105571612AShorten test timeGet rid of manual real-time monitoringMeasurement devicesDigital signal processingGyroscope
The invention relates to an automatic testing method for key parameters of an MEMS gyroscope structure. The method comprises the following steps: step (1) applying white noise voltage excitation to a driving structure electrode of a driving mode of the MEMS gyroscope so as to generate a driving force; step (2) enabling a vibration collecting structure electrode of the driving mode of the MEMS gyroscope to be connected with a preposition read out circuit, and enabling a response curve to be collected into a digital signal processing machine for FFT treatment so as to obtain resonant frequency fd of the driving mode; step (3) constructing a sine wave according to the resonant frequency fd obtained in the step (2), applying the sine wave to the driving structure electrode of the driving mode, and after determining the gyroscope starts oscillation, collecting an output voltage of the preposition read-out circuit of the driving mode and an output voltage of the preposition read-out circuit of a detection mode so as to obtain a coupling ratio; step (4) removing sine wave excitation, and computing the quality factor Qd of the driving mode through an attenuation curve. According to the automatic testing method disclosed by the invention, the structure key parameters of the resonant frequency, the quality factor, the coupling voltage ratio, the displacement ratio and the like can be automatically tested.
Owner:BEIJING AUTOMATION CONTROL EQUIP INST

Speed changing transmission device

ActiveCN109723788AApplicable to different working conditionsCompact structureFluid gearingsEngineeringDisplacement ratio
The invention provides a speed changing transmission device. An input component, an output component, a hydraulic transmission assembly, a rear planet gear assembly, a front planet gear assembly, a first clutch, a second clutch, a first brake, a second brake and a third brake are included. The output component and the rear planet gear assembly are connected so as to jointly rotate. The front planet gear assembly and the rear planet gear assembly are connected so as to jointly rotate, and the hydraulic transmission assembly and the front planet gear assembly are connected so as to jointly rotate. The first clutch and the second clutch are used for selectively connecting the input component to the front planet gear assembly for joint rotation. The first brake, the second brake, the third brake, the first clutch, the second clutch and a third clutch are selectively combined, and the continuous advancing or retreating transmission ratio between the input component and the output componentis provided. Through clutch and brake switchover and hydraulic system displacement ratio adjustment, switchover can be conducted among hydraulic transmission, hydraulic machine transmission and machine transmission.
Owner:JIANGSU UNIV

Variable-displacement-ratio double-stage compression air conditioner system and control method thereof

The invention provides a variable-displacement-ratio double-stage compression air conditioner system and a control method thereof. The variable-displacement-ratio double-stage compression air conditioner system comprises a variable-displacement-ratio double-stage compressor (1). A low-pressure suction pipeline (2), a high-pressure exhaust pipeline (3) and a capacity-variable pipeline (4) are arranged on the compressor in a connected mode. Low-pressure stage double air cylinders of the double-stage compressor are made to operate by introducing high pressure into the capacity-variable pipeline (4), and one low-pressure stage single air cylinder of the double-stage compressor is made to operate by introducing low pressure. Switching control over the displacement ratio can be realized by introducing high pressure or low pressure into the capacity-variable pipeline, switching control over the displacement ratio is carried out through the above ways according to the indoor unit capacity requirement and overall load, the air conditioner system operates in a large displacement mode when the load is small and operates in a small displacement mode when the load is large, and the operating efficiency of the system is maximized, so that the technical problem of poor economy existing when the load is too small or too large is solved.
Owner:GREE ELECTRIC APPLIANCES INC

Anti-seismic performance optimization method for tall building structure based on comprehensive cost method

The invention discloses an anti-seismic performance optimization method for a tall building structure based on a comprehensive cost method. The method comprises the steps that (1) a tall building structure model is established; (2) a certain anti-seismic performance index in a displacement angle or a displacement ratio is selected to serve as an optimization objective, and structural members are grouped; (3) constraint conditions for structural member optimization and an objective function are set; (4) optimization variables are made into a variable combination matrix; (5) a variable value of each variable participating in combination is modified; (6) response surface fitting is performed on obtained design experiment data results, and sensitivity coefficients are obtained; (7) first m variables with high sensitivity coefficients are determined and adjusted; (8) a model of a final result of iteration convergence is used as an initial model of strength optimization to perform strength optimization on all the structural members; and (9) structural performance of the building structure model obtained after strength optimization is calculated again, and a final comprehensive optimization scheme is formed.
Owner:ARCHITECTURAL DESIGN RES INST OF GUANGDONG PROVINCE

Variable-volume two-stage compression system and control method thereof

InactiveCN105466060ALittle change in energy efficiencySatisfy refrigerationCompressorExternal parameterEngineeringHigh pressure
The invention provides a variable-volume two-stage compression system which comprises a compressor (1). The compressor (1) comprises a low pressure cylinder and a high pressure cylinder which are connected in series. The low pressure cylinder comprises at least two air cylinders connected in parallel. The compression system further comprises a control mechanism which can control at least one of the air cylinders connected in parallel to perform full-load operation and / or non-load operation. Variable high and low pressure level displacement ratios can be achieved on the compressor, the energy efficiency changes are small compared with a system with two compressors connected in series, the requirement for refrigeration and heating energy efficiency can be met at the same time, and the system economy is greatly improved; the structure is simpler, the cost is lower, and the problem that balancing oil of the two compressors is not balanced is solved; and in addition, the operation temperature range of the system can be enlarged, the operation efficiency of the system can be improved, the reliability of the two-stage compression system is improved, and therefore the economy of the two-stage compression system is greatly improved. The invention further relates to a variable-volume two-stage compression control method.
Owner:GREE ELECTRIC APPLIANCES INC

Method for processing long-pile short-pier composite foundation

The invention relates to a method for processing a long-pile short-pier composite foundation, which sets pier-changing and inter-pier pitching piles in the foundation to satisfy the foundation bearing capacity and deformation requirements, performs pier setting mainly through a forced ramming or forced ramming displacement method, and sets sedimentation control piles between the piers. The principle of displacing pier distribution points comprises the following steps: symmetrically setting one or more displacement points for changing the piers in the length direction of an independent foundation, and setting the sedimentation control piles between the displacement points as the inter-pier pitching piles; evenly setting a plurality of displacement points for changing the piers in the length direction of a strip foundation, and arranging the sedimentation control piles between the displacement points according to the designed separation distance; and on the basis of a large size, calculating the required displacement ratio of rectangular or quincuncial distribution points for the displacing pier distribution points according to the bearing capacity, calculating the required pile number for the sedimentation control piles according to sedimentation, and arranging the piles according to rectangular or quincuncial shapes between the displacing piles. The method has the advantages of manufacturing cost saving, mature construction experience, simple process and remarkable effect, and economically and effectively solves the problems that the bearing capacity of deep made ground or a soft soil foundation is insufficient and the foundation deformation is large and uneven.
Owner:上海现代建筑设计(集团)有限公司 +2

Vibrating element, electronic device, electronic apparatus, and moving object

A tuning fork-type vibrator element as a vibrating element includes a drive vibrating arm that performs a flexural vibration, and a drive electrode (a first drive electrode and a second drive electrode) provided on the drive vibrating arm. When a direction in which the drive vibrating arm extends is a Y-axis, a direction in which the drive vibrating arm performs a primary vibration is an X-axis, and a direction orthogonal to the Y-axis and the X-axis is a Z-axis, the drive vibrating arm performs the flexural vibration with a displacement ratio of greater than 0% and 20% or less where the displacement ratio is obtained by dividing a displacement amount in the Z-axis direction by a displacement amount in the X-axis direction.
Owner:SEIKO EPSON CORP

Method for treating three-layer soft foundation by using I-shaped mixing pile

The invention discloses a method for treating a three-layer soft foundation by using an I-shaped mixing pile, which comprises the following steps: the I-shaped mixing pile is arranged on the three-layer soft foundation, the upper part and the lower part of which are soft soil layers and the middle of which is a hard soil layer; the I-shaped soft foundation comprises a middle small pile with smaller diameter, an upper expansion head and a lower expansion head with bigger diameter, the middle small pile is arranged in the hard soil layer at the middle, and the upper expansion head and the lower expansion head are arranged in the upper soft soil layer and the lower soft soil layer. The I-shaped mixing pile forms a compound foundation with two displacement ratios through the change of the pile body diameter, the upper soft soil layer and the lower soft soil layer with poor engineering mechanical properties adopt higher displacement ratio, the middle hard soil layer with better engineering mechanical properties adopts lower displacement ratio, and different soil layers in the three-layer soft foundation are performed the pointed treatment so as to achieve the purpose of saving construction cost.
Owner:SOUTHEAST UNIV

Equivalent method for on-board initiating explosive device explosion shock spectra

ActiveCN106644779AThe test method is simpleThe test method is matureStrength propertiesTime domainOn board
An equivalent method for on-board initiating explosive device explosion shock spectra includes the steps: (1) acquiring on-board equipment initiating explosive device explosion shock time domain acceleration spectrum values and converting the spectrum values into shock response spectra; (2) acquiring vibration displacement for obtaining different frequency points by the aid of the shock response spectra; (3) accumulating and summing the vibration displacement of each frequency point; (4) acquiring displacement cumulative sum of the ground universal shock response spectra according to on-board applied shock acceleration spectrum values in satellite universal ground impact test and according to the steps (2) and (3); (5) determining the displacement ratio of the shock response spectra of on-board equipment to ground universal shock response spectrum conditions according to the steps (3) and (4); (6) acquiring the shock response spectra equivalent to on-board equipment initiating explosive device explosion shock by the aid of the obtained ratio and universal shock response spectra of on-board equipment ground impact tests.
Owner:AEROSPACE DONGFANGHONG SATELLITE

Variable-speed transmission device

The invention provides a variable-speed transmission device. The variable-speed transmission device comprises an input component, a hydraulic power transmission assembly, a mechanical transmission assembly, an output component and a clutch assembly; the input component and the hydraulic power transmission assembly are connected, the hydraulic power transmission assembly and the input component areconnected to the mechanical transmission assembly through the clutch assembly, and the mechanical transmission assembly and the output component are connected through the clutch assembly; and the clutch assembly provides the transmission ratio for continuous advancing or retreating between the input component and the output component. By adjusting the displacement ratio of the hydraulic power transmission assembly and selectively controlling joint of the clutch assembly, thus the transmission modes for advancing or retreating between the input component and the output component are provided and comprise static hydraulic transmission, hydraulic mechanical transmission and mechanical transmission. The variable-speed transmission device can be switched to be in three transmission modes, provides traveling and operation functions at the low gear position, and mainly provides the traveling function at the high gear position.
Owner:JIANGSU UNIV

Dangerous condition early warning and forecasting method for pipe jacking downward penetrating process of existing box culvert

The invention relates to a dangerous condition early warning and forecasting method for pipe jacking downward penetrating process of an existing box culvert. The method comprises the steps that 1, multiple characteristic parameter data of the existing box culvert and the surrounding soil bodies of the existing box culvert are collected through a monitoring device; 2, format processing is conductedon the collected data; 3, the soil strength in a disturbance zone is obtained through inversion by using a dichotomous displacement ratio method; 4, multiple characteristic parameters, the weight ofthe soil strength of the disturbance zone affecting culvert safety coefficients and gray relational grade are obtained through a hierarchical analysis gray relational grade method; 5, a long and shortterm memory circulation neural network model is established to predict the destruction occurring time of the existing box culvert; 6, a Kalman filtering method is adopted to predict the destruction occurring time of the existing box culvert; 7, prediction results of step 5 and step 6 are combined to conduct early warning and forecasting on dangerous conditions before the critical destruction occurring prediction time. Compared with the prior art, the method can more reasonably perform quantification early warning and forecasting on the dangerous condition for pipe jacking downward penetratingof the existing box culvert in a manner which is more closer to actual conditions.
Owner:TONGJI UNIV

Method for instant recognition of traffic lights countdown image

A method for instant recognition of traffic lights countdown image that can quickly scan and confirm the circular feature image of a traffic light, and retrieve the countdown image thereof by calculating the displacement ratio from the circular image, then enhance, cut and converse the countdown image to display a feature image thereof, and proceed similarity comparison with collected data to calculate the percentage of similarity. The method eventually brings out a result from the image comparisons, so as to fulfill the effectiveness of searching and instantly recognizing the countdown image of a traffic light.
Owner:YUAN ZE UNIV

Refrigeration cycle device

The invention provides a refrigeration cycle device which comprises a rotary compressor, a first heat exchanger, a first throttling mechanism and a second heat exchanger, and the rotary compressor, the first heat exchanger, the first throttling mechanism and the second heat exchanger are sequentially connected to form a refrigeration cycle loop. The rotary compressor comprises at least two sets of low-pressure cylinders and at least one set of high-pressure cylinders, the low-pressure cylinders are used as first-stage compressing cylinders, the high-pressure cylinders are used as second-stage compressing cylinders, one of the at least two sets of low-pressure cylinders is provided with a pressure switching mechanism, the pressure switching mechanism comprises switch pieces, and the switch pieces are used for guiding low-pressure refrigerants or high-pressure refrigerants of the refrigeration cycle device to a control cavity arranged on the rear surface of a sliding piece in a switching mode; the pressure switching mechanism further comprises a sliding piece limiting element, and a back pressure chamber at the lower end of the sliding piece limiting element is always communicated with the low-pressure refrigerants. The refrigeration cycle device has following beneficial effects: a certain low-pressure cylinder is smoothly switched between non-compression operation and normal-compression operation to achieve improvement of energy efficiency of the refrigeration cycle device; and different displacements and different high-low-pressure-level displacement ratios are selected according to requirements for comfortableness of an air conditioner.
Owner:GREE ELECTRIC APPLIANCES INC +1

Method for controlling torsion of base isolation structure

The invention provides a method for controlling torsion of a base isolation structure. A displacement ratio, a ratio of a torsion component to a translational motion component and a torsion shearing force ratio are taken as torsional effect indexes, torsional effect index values are acquired and adjusted to accord with limit values, and accordingly, torsion of the base isolation structure of a complicated and irregular system is controlled. The method specifically comprises steps as follows: a three-dimensional finite element model of an irregular to-be-isolated system is established, isolation support parameters are determined in combination of a limiting value of the offset distance between the center of rigidity and the center of mass of an isolation layer, an isolation structure model is established, the torsional effect index values are extracted, whether the torsional effect index values meet the requirements of limit values is judged, a corresponding technical route is adopted according to the ultralimit condition, and finally, the torsional effect index values can all meet the requirements. According to the method, as for the complicated and irregular isolation structure, an effective torsion effect index and a specific implementation method are provided quantitatively, quantitative standards and specific operation standards are provided for an isolation technology for controlling torsion of the structure, and larger application and promotion values are provided.
Owner:CHINA AVIATION PLANNING & DESIGN INST GRP

Drop hammer type dynamic biaxial extension test device

The invention discloses a drop hammer type dynamic biaxial extension test device. The drop hammer type dynamic biaxial extension test device is characterized by comprising a base plate, a hammerhead and four groups of clamping devices, wherein the four groups of clamping devices are separately used for clamping four extension arms on a test piece in a one-to-one correspondence mode, the clamping devices are oppositely arranged in pairs, and a sliding device moves in the length direction of the extension arms of the test piece is arranged between the clamping devices and the base plate. The hammerhead is located right above the test piece, and four planes at the lower end of the hammerhead are inclined planes and directly face the four extension arms of the test piece in a one-to-one correspondence mode. The drop hammer type dynamic biaxial extension test device has the advantages that the four clamping devices are driven to move simultaneously through the hammerhead, four ends of the test piece are loaded simultaneously, the dynamic mechanical type biaxial extension of the test piece is realized, the structure is compact and simple, and the cost is low; and the test piece with different biaxial extension angles and different extension displacement ratios can be loaded by changing an included angle between the two adjacent extension arms on the test piece, changing the positionbetween the two corresponding groups of clamping devices and changing an inclined angle of the lower end surface of the hammerhead, and thus, the loading of the test piece is flexible and varied.
Owner:NINGBO UNIV

Construction method for composite foundation on soft soil stratum

The invention discloses a construction method for a composite foundation on a soft soil stratum. The main equipments relating to the construction method are a pile machine, a column hammer (2) and a pile casing (1), wherein feeding openings (3) are formed in the casing wall of the pile casing (1). Besides the preparatory processes such as staking, layout, and placing the pile machine in a proper place, the construction method further comprises the following steps: dropping the hammer repeatedly to beat a soft soil layer until the column hammer (2) is in contact with a bearing stratum (9) to form a pile hole (4); feeding and tamping repeatedly to form a single discrete pile (6); constructing corresponding multi-single discrete piles on multi-pile positions to form discrete cluster piles; treating the discrete cluster piles according to a post process to form the complete composite foundation; the solid material is an artificial compound composed by the inorganic solid material and original soil. Under the action of tamping energy, the dropped solid material not only is tamped, but also is extruded and expanded around; the soil mass intensity around the pile is also transformed when the pile is formed, and a pile-soil common stressing body is formed so as to form a composite foundation of which large area of the soft soil foundation is wholly strengthened and the displacement ratio is higher.
Owner:丁思华 +1

High-rise building structure anti-seismic property optimization method based on sensitivity coefficient method

The invention discloses a high-rise building structure anti-seismic property optimization method based on a sensitivity coefficient method. The optimization method includes (1), creating a high-rise building structure model; (2), selecting one anti-seismic property index in a displacement angle or displacement ratio as an optimization target, and grouping structural members; (3), setting constraint conditions and a target function for structural member optimization; (4), making optimization variables into a variable combination matrix; (5), modifying values of the variables in the combination, and performing structural anti-seismic calculation analysis to acquire a design experiment data result; (6), subjecting the acquired design experiment data result to response surface fitting to acquire a sensitivity coefficient; (7), calculating the target function on the basis of the sensitivity coefficient. The high-rise building structure anti-seismic property optimization method has the advantages that the contribution degrees of the structural members in a high-rise building structure to the displacement angle or displacement ratio under the earthquake action can be analyzed quantitatively, and accordingly, the anti-seismic property optimization direction of the high-rise building structure is determined.
Owner:ARCHITECTURAL DESIGN RES INST OF GUANGDONG PROVINCE

Method for instant recognition of traffic lights countdown image

A method for instant recognition of traffic lights countdown image that can quickly scan and confirm the circular feature image of a traffic light, and retrieve the countdown image thereof by calculating the displacement ratio from the circular image, then enhance, cut and converse the countdown image to display a feature image thereof, and proceed similarity comparison with collected data to calculate the percentage of similarity. The method eventually brings out a result from the image comparisons, so as to fulfill the effectiveness of searching and instantly recognizing the countdown image of a traffic light.
Owner:YUAN ZE UNIV

Multifunctional continuously variable transmission device

ActiveCN109751381ARealize switchingAdapt to transmission requirementsFluid gearingsLow speedEngineering
The invention provides a multifunctional continuously variable transmission device comprising an output component, an input component, a hydraulic transmission assembly, a planet gear assembly, a clutch assembly and a brake assembly. The input component is connected with the hydraulic transmission assembly and the planet gear assembly. The planet gear assembly is connected with the output component through a gear shifting assembly. The input component and the hydraulic transmission assembly are connected to the planet gear assembly through the clutch assembly. The brake assembly and the clutchassembly provide the transmission ratio of continuous advancing or retreating between the input component and the output component. By combining regulation of the displacement ratio of the hydraulictransmission assembly and selective control over the clutch assembly and the brake assembly, the transmission manner of advancing or retreating between the input component and the output component isprovided. The transmission device can meet low-speed work and high-speed operation requirements, and continuous speed variation is achieved in the switching processes of all transmission manners.
Owner:JIANGSU UNIV

Multi-mode switching power transmission system with variable planetary gear characteristic parameters

The invention provides a multi-mode switching power transmission system with variable planetary gear characteristic parameters. The multi-mode switching power transmission system comprises an input component, an output component, a clutch assembly, a hydraulic transmission assembly and a planetary gear assembly, the input component is connected with the hydraulic transmission assembly, the outputcomponent is connected with the input component, the planetary gear assembly and the hydraulic transmission assembly, the input component and the hydraulic transmission assembly are connected to the planetary gear assembly by the clutch assembly, and the clutch assembly provides the transmission ratio for continuous advancing or retreating between the input component and the output component. By adjusting the displacement ratio of the hydraulic transmission assembly and selectively controlling jointing of the clutch assembly, the transmission mode for advancing or retreating between the inputcomponent and the output component is provided. The multi-mode switching power transmission system combines hydraulic transmission and mechanical transmission, hydraulic mechanical stepless transmission is generated, stepless speed-regulating is achieved through hydraulic transmission, and efficient transmission is achieved through mechanical transmission.
Owner:JIANGSU UNIV

Hydraulic type engineering machine and torque control method and device thereof

The invention discloses a torque control method of a hydraulic type engineering machine. The method comprises the steps of acquiring the current rotating speed of a turbine and the current rotating speed of an engine, acquiring the current rotating speed ratio between the turbine and the engine, and acquiring the current displacement ratio between the turbine and the engine according to the current rotating speed ratio; acquiring a standard displacement ratio corresponding to a standard rotating speed ratio corresponding to the current rotating speed of the turbine; judging whether the current displacement ratio is smaller than the standard displacement ratio, adjusting the current rotating speed of the engine to a corresponding standard rotating speed of the engine when the current rotating speed of the turbine reaches the standard displacement ratio if yes, and keeping the current situation unchanged if not. By means of the method, the rotating speed ratio between the turbine and the engine can be optimized, so that the highest displacement ratio is obtained and the phenomena that a system is overheated and energy is wasted are avoided. The invention further discloses a torque control device of the hydraulic type engineering machine corresponding to the method and a hydraulic type engineering machine comprising the torque control device.
Owner:SHANTUI CONSTR MASCH CO LTD
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