Abstract: The provided is an in-situ test device and method for a friction characteristic of an interface of a valve plate pair in a cam-lobe radial piston hydraulic motor. A transmission shaft of a valve plate pair realistic-simulation module is connected to a motor; and the valve plate pair realistic-simulation module is threadedly connected to a valve plate pair guide module. By controlling a rotational speed of the motor and pressures of high-pressure and low-pressure port windows of a valve plate, the provided can realistically reproduce high-pressure and low-pressure port distribution functions of the valve plate pair in the hydraulic motor and simulate a wear state of the interface between the valve plate and the cylinder block, such that the friction characteristic of the interface of the valve plate pair is the same as an in-situ test result.

Abstract: A motor controller, an electric drive apparatus, an electric drive system, and an electric device. The motor controller includes a first control assembly, a second control assembly, and a cooling assembly. The first control assembly is electrically connected to a first motor. The second control assembly is electrically connected to a second motor. The cooling assembly is configured to cool the first control assembly and the second control assembly. The first control assembly, the cooling assembly, and the second control assembly are sequentially stacked.

Abstract: Disclosed is an application of glycerol monodecanoate (GMD) in the preparation of a hypoglycemic drug or a functional food, falling within the technical field of medicine. According to the present disclosure, the hypoglycemic and insulin resistance-improving functions of GMD are first revealed. Studies demonstrate that GMD can enhance glucagon-like peptide-1 (GLP-1) secretion, activate hepatic glycolysis and insulin receptor (INSR)-related gene expression, while inhibiting hepatic gluconeogenesis pathway-related gene expression. Notably in type 2 diabetes mellitus (T2DM), glucose-lowering efficacy of GMD is comparable to metformin, and it outperforms metformin in regulating glucose tolerance and insulin tolerance, with significant alleviation of polydipsia. Moreover, as GMD is a naturally occurring edible substance with a high safety profile, it has a good application prospect in the preparation of a drug for treating hyperglycemia and diabetes, or a functional food to assist in lowering blood glucose.

Abstract: Disclosed is an application of glycerol monodecanoate (GMD) in the preparation of a hypoglycemic drug or a functional food, falling within the technical field of medicine. According to the present disclosure, the hypoglycemic and insulin resistance-improving functions of GMD are first revealed. Studies demonstrate that GMD can enhance glucagon-like peptide-1 (GLP-1) secretion, activate hepatic glycolysis and insulin receptor (INSR)-related gene expression, while inhibiting hepatic gluconeogenesis pathway-related gene expression. Notably in type 2 diabetes mellitus (T2DM), glucose-lowering efficacy of GMD is comparable to metformin, and it outperforms metformin in regulating glucose tolerance and insulin tolerance, with significant alleviation of polydipsia. Moreover, as GMD is a naturally occurring edible substance with a high safety profile, it has a good application prospect in the preparation of a drug for treating hyperglycemia and diabetes, or a functional food to assist in lowering blood glucose.

Abstract: Provided is a dynamic characteristic measurement method for a cylinder block of a non-intrusive axial piston pump. The cylinder block is the main rotating component of the axial piston pump, and the dynamic characteristic of the cylinder block is more capable of reflecting the health condition of the pump than an external characteristic. A non-contact type measurement scheme is provided so as to reduce the influence of a measurement device on the motion of the cylinder block. Cylinder block contour signals and radial displacement signals are obtained by measuring the radial displacement of two sections of the surface of the cylinder block under different working conditions in the perpendicular directions, and then the cylinder block contour signals are accurately removed from the radial displacement signals to obtain the translational and tilting motion characteristics of the cylinder block.

Abstract: Provided is a design method for a self-compensation structure of a cam-lobe hydraulic motor plate distribution system, which comprises that follow steps: firstly, establishing a force balance equation, a pressure distribution equation and a flow balance equation for each balance chamber, setting a boundary condition, and setting an expected nominal clearance; selecting a fit clearance for simultaneous solutions, and obtaining a set of solutions of areas; taking a maximum value in this set of solutions as the median, and setting a set of area values in the optimization design; further solving changing curves of the nominal clearance and the total leakage of the distribution system with the rotation angle of the cylinder block, and calculating the average value of various curves after the operation is smooth, and designing the self-compensation structure based on selection of the optimal combination of the fit clearance and area.

Abstract: A pull-down lock, may include a top cover, wherein the bottom end of the top cover is fixedly connected with the pull rod, and the bottom end of the pull rod is fixedly connected with the lock head; besides, the lock bolt component for limiting and fixing the lock head is arranged in the movable part upper cover, and the movable part base is slidably inserted into the bottom end of the movable part upper cover; the movable part base is internally provided with the pull-down component which is adapted to and penetrates through the lock bolt component. When the movable part base is pulled to move downwards, the lock bolt component could be pushed to move under the cooperation of the pull-down component, so that the limiting and fixation of the lock head is released.

Abstract: A diimine metal complex represented by Formula I, a preparation method therefor, and application thereof are provided. The complex is used as a main catalyst in catalysts for olefin polymerization, and can achieve catalytic ethylene polymerization at a high temperature to prepare high molecular weight branched polyethylene.

Abstract: A method for preparing an olefin-olefinic alcohol copolymer and an olefin-olefinic alcohol copolymer prepared by the method are provided. The catalyst used in the method for preparing the olefin-olefinic alcohol copolymer has a diimine metal complex as shown in Formula I.

Abstract: An amino-imine metal complex represented by Formula I, its preparation method and an application thereof are provided. The complex is used as a main catalyst in catalysts for olefin polymerization, and can catalyze the polymerization of ethylene at a relatively high temperature to prepare branched polyethylene having high molecular weight.

Abstract: A pull-down lock, may include a top cover, wherein the bottom end of the top cover is fixedly connected with the pull rod, and the bottom end of the pull rod is fixedly connected with the lock head; besides, the lock bolt component for limiting and fixing the lock head is arranged in the movable part upper cover, and the movable part base is slidably inserted into the bottom end of the movable part upper cover; the movable part base is internally provided with the pull-down component which is adapted to and penetrates through the lock bolt component. When the movable part base is pulled to move downwards, the lock bolt component could be pushed to move under the cooperation of the pull-down component, so that the limiting and fixation of the lock head is released.

Abstract: The present application discloses a testing device and a testing method for multiple piston assembly of a cam-lobe hydraulic motor. N cylinder blocks are installed on the cylinder block base, and piston assemblies to be tested are installed on the cylinder blocks. A driving plate is installed on the cylinder block base, and N uniformly-distributed driving plate clamping grooves are formed in the driving plate. A cylinder block protrusion is arranged at the bottom of each cylinder block, and the cylinder block protrusions are clamped in the driving plate clamping grooves. When the driving plate is rotated, the N driving plate clamping grooves drive the N cylinder blocks to rotate synchronously through the cylinder block protrusions, to synchronously change the pressure angle between a driving shaft and each piston assembly.

Abstract: Disclosed are an electric drive assembly and an electric device. The electric drive assembly includes a motor, a speed shifting mechanism connected to the motor, and a cooling system configured to supply lubricating oil to the motor and the speed shifting mechanism in sequence. With the cooling system provided, lubricating oil is sequentially supplied to the motor and the speed shifting mechanism, reducing the loss of the cooling capacity of lubricating oil in the speed shifting mechanism, improving the cooling efficiency and the utilization rate of the cooling capacity, and reducing the loss.

Abstract: Disclosed are a motor, an electric drive device, an electric drive system, and an electric apparatus. The motor includes a casing and a stator. The casing has a first accommodation cavity configured to accommodate a cooling medium. The stator is disposed in the first accommodation cavity. At least part of the stator is immersed in the cooling medium.

Abstract: A constant value method for detecting and evaluating internal leakage in a hydraulic cylinder and a detection device. The method comprises: step (1) measuring an accurate pressure drop value ?p of the internal leakage in the hydraulic cylinder; step (2), determining whether the detected hydraulic cylinder meets a standard: if the product of the accurate pressure drop value ?p of the internal leakage in the hydraulic cylinder and a corresponding hydraulic stroke L, is less than a standard parameter C for evaluating the internal leakage in the hydraulic cylinder, C = 4 ? QtK ? ? D 2 , the internal leakage in me hydraulic cylinder meets the standard. Otherwise, the internal leakage in the hydraulic cylinder does not meet the standard. The detection device comprises a motor, a hydraulic pump, a directional valve, a detected part, a pipeline disassembly joint and a pressure sensor.

Abstract: Provided is a design method for a self-compensation structure of a cam-lobe hydraulic motor plate distribution system, which comprises that follow steps: firstly, establishing a force balance equation, a pressure distribution equation and a flow balance equation for each balance chamber, setting a boundary condition, and setting an expected nominal clearance; selecting a fit clearance for simultaneous solutions, and obtaining a set of solutions of areas; taking a maximum value in this set of solutions as the median, and setting a set of area values in the optimization design; further solving changing curves of the nominal clearance and the total leakage of the distribution system with the rotation angle of the cylinder block, and calculating the average value of various curves after the operation is smooth, and designing the self-compensation structure based on selection of the optimal combination of the fit clearance and area.

Abstract: The present application discloses a testing device and a testing method for multiple piston assembly of a cam-lobe hydraulic motor. N cylinder blocks are installed on the cylinder block base, and piston assemblies to be tested are installed on the cylinder blocks. A driving plate is installed on the cylinder block base, and N uniformly-distributed driving plate clamping grooves are formed in the driving plate. A cylinder block protrusion is arranged at the bottom of each cylinder block, and the cylinder block protrusions are clamped in the driving plate clamping grooves. When the driving plate is rotated, the N driving plate clamping grooves drive the N cylinder blocks to rotate synchronously through the cylinder block protrusions, to synchronously change the pressure angle between a driving shaft and each piston assembly.

Abstract: A method for preparing polymer includes the steps of enabling olefin and unsaturated carboxylate be subjected to a polymerization reaction in the presence of a catalyst to generate an olefin-unsaturated carboxylate polymer. The catalyst has a primary catalyst and optionally a cocatalyst. The primary catalyst has at least one complex represented by formula I, formula I?, or formula I?. By selecting a reacted unsaturated carboxylate monomer, catalysts, and a suitable polymerization process, a spherical and/or sphere-like polymer having good shape is directly prepared without subsequent processing steps such as granulation, and the obtained polymer product is not prone to fouling in a reactor and is convenient for transportation.

Abstract: A constant value method for detecting and evaluating internal leakage in a hydraulic cylinder and a detection device. The method comprises: step (1) measuring an accurate pressure drop value ?p of the internal leakage in the hydraulic cylinder; step (2), determining whether the detected hydraulic cylinder meets a standard: if the product of the accurate pressure drop value ?p of the internal leakage in the hydraulic cylinder and a corresponding hydraulic stroke L, is less than a standard parameter C for evaluating the internal leakage in the hydraulic cylinder, C = 4 ? QtK ? ? D 2 , the internal leakage in me hydraulic cylinder meets the standard. Otherwise, the internal leakage in the hydraulic cylinder does not meet the standard. The detection device comprises a motor, a hydraulic pump, a directional valve, a detected part, a pipeline disassembly joint and a pressure sensor.

Abstract: Provided is a dynamic characteristic measurement method for a cylinder block of a non-intrusive axial piston pump. The cylinder block is the main rotating component of the axial piston pump, and the dynamic characteristic of the cylinder block is more capable of reflecting the health condition of the pump than an external characteristic. A non-contact type measurement scheme is provided so as to reduce the influence of a measurement device on the motion of the cylinder block. Cylinder block contour signals and radial displacement signals are obtained by measuring the radial displacement of two sections of the surface of the cylinder block under different working conditions in the perpendicular directions, and then the cylinder block contour signals are accurately removed from the radial displacement signals to obtain the translational and tilting motion characteristics of the cylinder block.