53 results about "Displacement ratio" patented technology

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.

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.

A liquid level sensing arrangement for a tank may include a float having a disc-like shape and a sensor that detects a position of the float relative to the tank. The float may have an overall height/total displacement ratio of 0.5 or less. The float may have a range of motion relative to the tank so that at least a portion of the float may move below a portion of a bottom wall of the tank and/or below an outlet for the tank.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.