47 results about "Hydraulic connection" patented technology

The application discloses a rock drill and a control system thereof. The control system is used for controlling a drill bit of the rock drill. The control system comprises an impact oil cylinder, a propelling oil cylinder, an impact control valve, a propelling sensor and a controller. The controller is electrically connected to the propelling sensor. The impact control valve is hydraulically connected to the impact oil cylinder. The controller is electrically connected to the impact control valve to obtain a flow of an oil circuit of the impact oil cylinder which is matched with a pressure of an oil circuit of the propelling oil cylinder when the pressure of the oil circuit of the propelling oil cylinder detected by the propelling sensor changes. The rock drill and the control system thereof have the beneficial effect that the impact frequency of the impact oil cylinder is matched with the pressure of the oil circuit of the propelling oil cylinder.

The invention relates to an intravascular blood pump comprising a pumping device having a pump portion and a drive portion, wherein the pump portion comprises a pump housing having a primary blood flow inlet and a primary blood flow outlet hydraulically connected by a primary passage, and the drive portion comprises a stator and a rotor rotatable about a rotational axis and configured to rotate a primary impeller configured to convey a primary blood flow along the primary passage from the primary blood flow inlet to the primary blood flow outlet, the drive portion further comprising a secondary blood flow inlet and a secondary blood flow outlet hydraulically connected by a secondary passage extending through an axial gap between the rotor and the stator and a secondary impeller arranged at a drive portion end of the rotor and rotatable about the rotational axis together with the rotor.

This application pertains to the field of industrial vehicles and discloses a steering hydraulic system and a forklift. The steering hydraulic system includes a steering gear with first and second oil outlets; a steering cylinder with a first connecting oil passage between its first end and the first oil outlet, and a second connecting oil passage between its second end and the second oil outlet; and a booster cylinder, including a first booster cylinder disposed in the first connecting oil passage and a second booster cylinder disposed in the second connecting oil passage. Both the first and second booster cylinders include a small piston cylinder and a large piston cylinder located at both ends. The large piston cylinder is hydraulically connected to the oil outlet of the steering gear, and the small piston cylinder is hydraulically connected to the cylinder chamber of the steering cylinder; and a replenishing valve, which is a replenishing and balancing oil passage disposed between the small piston cylinders of the first and second booster cylinders. By adding a booster cylinder, this application achieves a boosted drive effect, making steering lighter and more flexible. Furthermore, by setting up a replenishing valve, it can be used to achieve oil balance between the two cylinders in a timely manner.

The present invention relates to a brake system (100) comprising a primary brake actuator (1) and a secondary brake actuator (2), wherein the primary brake actuator (1) can set a target brake pressure (p_target) (603). [Solution] In the first monitoring phase, the secondary brake actuator (2) monitors the primary brake actuator (1) to see if a target brake pressure exists (604). If the target brake pressure is not present, the secondary brake actuator (2) hydraulically shuts off at least one hydraulic connection (22) between the primary brake actuator (1) and the secondary brake actuator (2) (605).

Outdoor unit (1) for a heat displacement system, comprising a housing and at least two housing sections separated from one another, wherein a ventilation duct, a fan (5) and an air-flowable heat exchanger are arranged in a first housing section (2), and wherein the ventilation duct has a non-closable inlet area and a non-closable outlet area for outside air, and wherein a refrigerant compressor and an expansion valve as well as connections for fluid lines for at least one heat sink and at least one heat source are arranged in a second housing section (3), and wherein a separating device is provided between the first and the second housing section, which separates the two gas spaces of the first and the second housing section and optionally further housing sections from one another, the separating device having a non-closable connecting opening (6) in the lower area,which hydraulically connects the first housing section (2) with the second housing section (3), wherein the fan (5) is designed and equipped to run continuously without stopping, and has its own uninterruptible power supply and explosion protection equipment, and the non-closable connecting opening (6) in the separating device is hydraulically connected to the suction side of the fan (5), and the second housing section (3) has an air inlet opening for outside air.

An actuation system (1) for adjusting the pitch of aircraft engine fan blades (200) comprising a hydraulic cylinder (5), including an isolation valve (71) adapted to selectively adopt a first and a second configuration, such that: - when the isolation valve (71) is in the first configuration, the hydraulic cylinder (5) is configured to be position-controlled by a control fluid from a main hydraulic circuit (4a); and - when the isolation valve (71) is in the second configuration, the piston of the hydraulic cylinder (5) can move in a first direction of travel by the action of a control fluid from an auxiliary hydraulic circuit (4b), the fan blade orienting itself towards a large pitch position, and the auxiliary hydraulic circuit (4b) not being hydraulically connected with the main hydraulic circuit (4a). Figure for the abstract: Fig. 5

This invention relates to a differential pressure measuring sensor (100) with overload protection, comprising: a measuring unit body (110); two separating diaphragms (130, 140); two overload diaphragms (150, 170) having radially variable material thickness h(r); a differential pressure transducer (190) for converting differential pressure into an electrical signal; and two hydraulic paths (200, 210); wherein each of the overload diaphragms (150, 170) is connected to the measuring unit body (110) to form an overload chamber; the separating diaphragms (130, 132) are connected to the measuring unit body (110) to form separating diaphragm chambers, and the overload diaphragm is enclosed in each of the separating diaphragm chambers. An overload diaphragm; each of the diaphragms (132) in the separation chamber is hydraulically connected to the overload chamber (152, 172) and to the differential pressure transducer (190) below the other separation diaphragm chamber via one of the hydraulic paths (200, 210), the hydraulic paths (200, 210) extending at least partially through the measuring unit body (110); and each of the overload diaphragms (150, 170) has a base surface (155, 175) facing a mating surface in the overload chamber (152, 172), in a standby state under equal pressure, the overload diaphragm (150, 170) is pre-tensioned against the mating surface.

The invention relates to a hydraulic brake system for operating hydraulically actuatable wheel brakes of an autonomously operating motor vehicle, comprising for each wheel brake an electrically actuatable inlet valve and an electrically actuatable outlet valve, as well as a first and a second electronic control device, a pressure medium reservoir at atmospheric pressure and a unique pressure source, the pressure source comprising a first and a second pressure output, the first pressure output being hydraulically connected to the inlet valve of a first brake circuit and the second pressure output being hydraulically connected to the inlet valve of a second brake circuit, the pressure source being an electrically motor-driven hydraulic multi-piston pump with a redundant drive structure. The invention further relates to a brake system having such a hydraulic brake system and to an electronic hydraulic brake control unit for a brake system of a motor vehicle, comprising a valve block for accommodating an electromagnetic switching valve and a pressure source, at least one electric motor being arranged on the valve block for driving a multi-piston pump with a redundant drive structure.

This invention relates to an intravascular blood pump, comprising a pumping device with a pump section and a drive section, wherein the pump section comprises a pump casing having a primary blood flow inlet and a primary blood flow outlet hydraulically connected by a primary passage and the drive section comprises a stator and a rotor rotatable about an axis of rotation and configured to rotate a primary impeller, the primary impeller being configured to convey a primary blood flow from the primary blood flow inlet to the primary blood flow outlet along the primary passage, the drive section further comprises an ancillary blood flow inlet and an ancillary blood flow outlet hydraulically connected by an ancillary passage extending through an axial gap between the rotor and the stator and an ancillary impeller arranged at a drive section end (DSE) of the rotor and rotatable about the axis of rotation along with the rotor, the ancillary impeller comprising one or more ancillary impeller vanes configured to convey an ancillary blood flow (ABF) from the ancillary blood flow inlet to the ancillary blood flow outlet along the ancillary passage in a direction toward a pump section end (PSE) of the pumping device, and the rotor is mounted in a blood-purged radial sliding rotor bearing with an inner rotor bearing surface and an outer rotor bearing surface, and the ancillary impeller forms the inner rotor bearing surface of the radial sliding rotor bearing.

Removable fire extinguishing device for an emergency vehicle. Fire extinguishing device (3, 3B, 3C, 3D, 3E, 3F) for an emergency vehicle (1) equipped with a water tank (2), the fire extinguishing device comprising: - a water distribution boom (11), - a plurality of water ejection nozzles (12) distributed along the boom, - a self-contained and removable hydraulic connection (13) configured to hydraulically connect the boom to a pipe (9) leading to the water tank, and - a self-contained and removable mounting means (14) intended to cooperate with a support (4) attached to the emergency vehicle. Figure for the abbreviation: Figure 1

This invention discloses a pressurized pipeline cascade pumping station operation control method based on energy dispatch optimization, belonging to the field of water conservancy engineering technology. The method includes the following steps: S1, determining the basic parameters of the pressurized water conveyance system cascade pumping stations, including pumping station operating parameters, pipeline and tunnel hydraulic constraint parameters, deriving energy consumption-related parameters based on the pumping station unit head-flow-power characteristic relationship, and adapting the hydraulic connection relationship between the pressurized pipeline and tunnel; S2, constructing an optimization model based on the basic parameters with the objective of minimizing total energy consumption under full-cycle water supply control. The pressurized pipeline cascade pumping station operation control method proposed in this invention significantly improves the overall flow regulation flexibility of the system by accurately tapping the regulation potential of power frequency and variable frequency pumping stations in the cascade pumping stations. It effectively addresses the problem of insufficient regulation potential tapping in traditional methods, constructs a unified flow constraint system, and enhances the adaptability of the technical solution to complex engineering environments.

The application discloses a telescopic and recyclable cycloid propeller and relates to the technical field of ships.The device comprises a propeller top cover, a power gear assembly, a control support, a control bearing, a base assembly, a hydraulic device and a propeller straight wing.The bottom of the propeller top cover is connected with the first part of the power gear assembly through a bearing.The control bearing is inherently connected with the hydraulic device.The control support is connected with the outside of the control bearing.The control support is connected with the propeller straight wing through a control shaft.The base assembly is connected with the first part of the power gear assembly.The base assembly is connected with the propeller straight wing through a fixed shaft.The first part of the power gear assembly and the second part of the power gear assembly are connected through gear transmission.The propeller straight wing is connected with the first straight wing and the second straight wing through straight wing hydraulic connection.The application is used for solving the problem of the photovoltaic operation and maintenance ship in response to different water depth environments and realizing water-land switching.

The application relates to the technical field of vehicles, and particularly discloses a hydraulic system, an engineering vehicle and a control method of the hydraulic system. The hydraulic system comprises a motor, a hydraulic actuator, a hydraulic driving unit and a hydraulic resistance element. The hydraulic actuator is used for supporting a load; the hydraulic driving unit is in driving connection with the motor, wherein the hydraulic driving unit is configured to provide hydraulic fluid to the hydraulic actuator under the driving of the motor, and the hydraulic driving unit is further configured to rotate under the driving of the hydraulic fluid in the hydraulic actuator and drive the motor to generate electricity; the hydraulic resistance element is in hydraulic connection between the hydraulic driving unit and the hydraulic actuator, and the hydraulic resistance element is configured to adjust the pressure difference between the hydraulic actuator and the hydraulic driving unit. Therefore, the motor can be selected to be a motor with a low rated torque, the rated power of a frequency converter can be reduced, the rotational inertia of the motor can be reduced, the dynamic response time of the system during speed change can be reduced, and the system cost can be reduced.

The utility model belongs to the technical field of water conservancy pipelines, and particularly relates to a water conservancy connecting pipeline which comprises a shell, connecting assemblies are arranged on the end faces of the two sides of the shell, two center fixing rods are symmetrically arranged in the shell, and the outer circle face of each center fixing rod is wrapped with a buffer layer. A first built-in pipeline and a second built-in pipeline which are connected with the connecting assembly are wound on the two buffer layers in the spiral direction correspondingly, and a filtering base is fixedly arranged in the shell and located between the first built-in pipeline and the second built-in pipeline; a first filtering cabin communicated with the first built-in pipeline and a second filtering cabin communicated with the second built-in pipeline are respectively arranged in the filtering seat. Through the arrangement of the first built-in pipeline, the second built-in pipeline and the like, the impact force of water flow is reduced, and the service life is prolonged; and silt and dirt in the pipeline are automatically filtered and removed through the arrangement of the filter seat and the like, and the problems of blockage and the like are reduced.

This invention discloses a steer-by-wire control and calibration method for off-highway wide-body mining dump trucks, belonging to the field of steer-by-wire technology for mining dump trucks. Existing systems mostly use electro-hydraulic servo valves, which are sensitive to hydraulic oil cleanliness and lack end-to-end hardware redundancy. The high dust and strong vibration environments of mining areas easily lead to steering performance degradation and sensor failure. This solution provides a system including a main controller, a first drive controller, a second drive controller, a first drive device, a second drive device, a hydraulic steering assist mechanism, a hydraulic actuator, a linear displacement detection device disposed on the hydraulic actuator, and a steering mechanism. The output ends of the first and second drive devices are mechanically connected to the input ends of the hydraulic steering assist mechanism, and the output end of the hydraulic steering assist mechanism is hydraulically connected to the hydraulic actuator. The first drive controller is electrically connected to the first drive device, and the second drive controller is electrically connected to the second drive device.

Component (3; 3') for an injection system (1) for spark-ignition internal combustion engines used to meter a high-pressure fluid, in particular a high-pressure line (5) or a fluid distributor (2), comprising a base body (14; 13) in which at least one hydraulic connection (15-20) is provided, wherein at least the base body (14; 13) with the connection (15-20) is formed by single- or multi-stage forging, wherein an interior space (11) is formed in the base body (14; 13) by chip-removal machining after forging, and wherein a connection channel (26-31) is formed in the connection (15-20) which intersects in an intersection region (40-45) with the interior space (11) by chip-removal machining after forging. It is proposed that the intersection region (40 - 45) be deburred by mechanical deburring.The invention also relates to an injection system (1) and a method for producing this component (3; 3').

This invention relates to the field of municipal engineering construction technology and discloses a high-precision construction method for split-type ultra-long-distance pipe jacking in narrow spaces. The method includes the following steps: determining the design route of the jacking pipeline; installing a pipe jacking cylinder in the receiving shaft, installing the jacking main unit in the working shaft, arranging a hydraulic power module outside the working shaft, and connecting the hydraulic power module to the jacking main unit via hydraulic connection pipelines; connecting the guide drill rod to the guide drill bit and the jacking main unit, installing a probe and a dual-frequency receiver at the end of the guide drill rod, and establishing a data link between the dual-frequency receiver and a ground-based handheld receiver. This invention, by installing the jacking main unit inside the working shaft, arranging the hydraulic power module outside the working shaft, and connecting the hydraulic power module to the jacking main unit via hydraulic connection pipelines, can reduce the space requirements of the working shaft. The minimum size of the working shaft can be compressed, reducing space requirements and making it suitable for narrow space conditions such as dense urban areas, residential areas, and under overpasses.

Hydraulic brake system (1) comprising at least one wheel brake cylinder (2-1 - 2-4); a primary brake pressure generator (3) which is hydraulically coupled to the at least one wheel brake cylinder (2-1 - 2-4) in a separable manner and is configured to pressurize the at least one wheel brake cylinder (2-1 - 2-4) by means of a hydraulic fluid; a master brake cylinder (4) which has at least one first pressure chamber (5) and is hydraulically coupled to the at least one wheel brake cylinder (2-1 - 2-4); and a secondary brake pressure generator (7) which is coupled to the first pressure chamber (5) of the master brake cylinder (4) and is configured to pressurize the first pressure chamber (5) of the master brake cylinder (4);wherein the secondary brake pressure generator (7) can be controlled independently of the primary brake pressure generator (3), and with a hydraulic fluid reservoir (8) which is hydraulically coupled to the first pressure chamber (5) of the master brake cylinder (4) via a first hydraulic connection (9-1) and which is hydraulically coupled to an inlet (10) of the secondary brake pressure generator (7) either via the same line through which the primary pressure generator 3 is coupled to the hydraulic fluid reservoir 8, or directly via a separate line, coupled to the hydraulic fluid reservoir 8.

The disclosure relates to a volume flow supply, in particular for closed center LS systems, comprising a pressure supply device and a pressure balance as components of a supply system for supplying fluid of a load which can be hydraulically connected to the supply system. The pressure supply device provides a volume flow when required in order to supply the hydraulic load in that the pressure balance is made of a circulation pressure balance which discharges a possible surplus volume flow out of the supply flow. The volume flow supply also comprises a controller which reduces the surplus volume flow to a minimum by actuating the pressure supply device.

The present invention relates to a hydraulic connector (14) which can be used to hydraulically connect a solenoid valve (7, 8) to one side of a second tube (2) of a damper system, the second tube (2) being inside a first tube (1), the solenoid valve (7, 8) being located on an outer side of the first tube (1). The invention further comprises the damper system which comprises a first chamber (13) inside the second tube (2), and a second chamber (12) between the second tube (2) and the first tube (1), such that the solenoid valve (7, 8) is configured to control the flow of liquid between the second chamber (12) and the first chamber (13), and the hydraulic connector (14) is configured to channel liquid between the first chamber (13) and the solenoid valve (7, 8), through an intermediate lateral through hole (23) in the second tube (2).

The invention relates to an arrangement (103) for an actuator (101) of a wind turbine; comprising a motor (105) and a first line arrangement (107a) which is hydraulically connected to a first port of the motor (105) and which is hydraulically connected or connectable to a pump (115). Via a second line arrangement (107b), the first port of the motor (105) is hydraulically connected to a fluid reservoir (117); the second line arrangement (107b) having a first check valve (121a) which is open from the fluid reservoir (117) towards the first port of the motor (105) and is closed in the opposite direction.

The present application relates to pumping and injection well linkage regulation technical field, specifically relates to a kind of pumping and injection well linkage hydrodynamic self-adaptive regulation system based on sensor data, the system includes processor and memory, processor executes the computer program stored in memory to realize the following steps: obtaining optimal cluster, based on the lag time and lag correlation intensity of data pair in optimal cluster, obtain the predicted lag time and predicted lag correlation intensity between the pumping well and injection well existing hydraulic connection under each dimension;Based on the predicted lag time and predicted lag correlation intensity between the pumping well and injection well existing hydraulic connection under the same dimension, lag time network and lag correlation network under each dimension are respectively constructed, and pumping well and injection well in target area are adaptively linked hydrodynamic regulation based on lag time network and lag correlation network.The present application can significantly improve the stability and precision of pumping well and injection well linkage hydrodynamic regulation.

An amplifier arrangement is hydraulically connected between a source of pressurized fluid and at least one wheel brake of a corresponding first or second pair of wheels. The accumulator arrangement comprises a medium-pressure accumulator, a non-energized medium-pressure accumulator fill valve fluidically connected between a pump-side passage of the medium-pressure accumulator and the source of pressurized hydraulic fluid, an energized medium-pressure accumulator one-way valve fluidically connected between a brake-side passage of the medium-pressure accumulator and the at least one corresponding wheel brake, and a medium-pressure accumulator check valve fluidically connected between the brake-side passage of the medium-pressure accumulator cavity and the at least one corresponding wheel brake. An electronic control unit is provided for controlling the secondary brake module and / or the master brake cylinder in response to at least one brake signal.The storage arrangement allows for a power-free emptying / filling phase during the operating lifetime of the brake system.

To prevent a bicycle from flipping over due to excessive braking force applied to the front brake caliper of a hydraulic braking system, an anti-flip-over system incorporates a single solenoid valve. The system measures the instantaneous deceleration of the bicycle and its instantaneous tilt angle relative to a horizontal reference. The solenoid valve closes automatically, interrupting the fluidic connection between the master cylinder and the caliper. This prevents the brake fluid pressure acting on the caliper from increasing further as the bicycle's deceleration approaches a threshold that, considering the incline of the surface on which the bicycle is traveling, would result in a flip-over.

The invention discloses a coiled tubing wellhead quick connecting device with a hydraulic flange, which belongs to the technical field of petroleum equipment and comprises a blowout prevention pipe connecting piece, a hydraulic connector and a hydraulic clamping system. The upper end of the blowout prevention pipe connecting piece is provided with a standard union joint which is quickly connected with a blowout prevention box or a blowout prevention pipe; a first step matched with the hydraulic connector is arranged at the lower end of the blowout prevention pipe connecting piece, and the lower end face of the first step is used for axial limiting of the blowout prevention pipe connecting piece. A flange plate connected with an external flange is arranged at the lower end of the hydraulic connector; and the hydraulic clamping system is used for locking or unfolding the blowout prevention pipe connecting piece and the hydraulic connector. The continuous pipe well control connecting equipment is safely and rapidly mounted and dismounted in a hydraulic control operation mode, and the situation that operators manually mount and dismount the well control equipment in a long-time and high-strength mode when the operators are exposed to the lower portion of a hoisting injection head is avoided.

The application belongs to the field of industrial vehicles, and discloses a steering hydraulic system and a forklift truck. The steering hydraulic system is sequentially connected in hydraulic pressure to a steering gear, a booster cylinder and a steering oil cylinder. The hydraulic oil at the oil outlet of the steering gear can drive the booster cylinder in hydraulic pressure, and the steering oil cylinder is driven to extend and retract by the booster cylinder. The application adds the booster cylinder between the steering gear and the steering oil cylinder, so that the hydraulic oil with low pressure can drive the steering oil cylinder by driving the booster cylinder, the booster driving effect is realized, the pressure output of the hydraulic system is improved, the steering operation intensity is significantly reduced, the steering is more flexible, the response speed and stability of the system are improved, and the energy utilization efficiency of the hydraulic system is optimized.

An electric spot-welding head (10) for a multi-axis industrial robot arm is described, comprising: - a support structure (100) comprising at least one attachment portion (127) for attaching the welding head to the multi-axis industrial robot arm; - a first electrode-holder arm (200) carrying a first welding electrode (202) and connected to said support structure; - a second electrode-holder arm (200) carrying a second welding electrode and connected to said support structure (100); and - an electric transformer (400) configured to apply an electrical voltage to said first and second welding electrodes (202, 302). The electric spot-welding head (10) is characterized in that it comprises particular connection devices (700, 800) to facilitate the electrical and hydraulic connection of the electric transformer (400).