91results about How to "Low control pressure" patented technology

A new high-strength titanium-based alloy bucket specifically suited for use as the last stage buckets in steam turbine engines having vane lengths of about 40 inches or greater and the method for forming such bucket. Exemplary buckets according to the invention are formed from a titanium-based alloy containing up to about 6.25% aluminum; (b) about to 3.5% vanadium; (c) about 2.25% tin, (d) about 2.25% zirconium, (e) about 1.75% molybdenum, (f) about 2.25% chromium, (g) about 0.7% silicon; and (h) about 2.3% iron, with the balance being titanium. After forming, the bucket can be heat treated to provide stress relief and then machined in a conventional manner.

A lift truck with variable range with at least three wheels and a telescopic arm. The lift truck includes a steerable rear wheel and two front wheels, a driver station and a motor propulsion group secured to a chassis. The chassis has a compact configuration and is elongated in the longitudinal direction of advance of the truck, and has safety elements against the risk of loss of lateral stability. The safety elements are adapted to oppose turning over of the truck. The truck also includes a device to limit the maximum speed of advance based on a turning angle of the steerable wheel.

The invention discloses a duplex type hydraulic control one-way valve, which comprises a valve body and a main valve core and is characterized in that a valve cavity is arranged in the valve body, the main valve core is arranged in the valve cavity, a spring connected with the top of the valve body is arranged inside the main valve core, an axial small hole is formed in the lower end of the main valve core, a radial hole communicated with the axial small hole is formed in the outer circle of the main valve core, the axial small hole is sealed through an unloading valve core push rod, an unloading valve core is arranged at the upper end of the unloading valve core push rod, a control opening is formed in the bottom of the valve body, a piston is arranged in the valve cavity arranged at the upper end of the control opening, a push rod is connected with the upper end of the piston, and the push rod can push the unloading valve core push rod to upwards move. The duplex type hydraulic control one-way valve solves the problems that the one-way valve can only realize the one-way flowing, the stable reverse flowing cannot be realized, the use function is single, in addition, the damage can easily occur, and the service life is short. The provided duplex type hydraulic control one-way valve has the advantages that the structure is simple, the use is convenient, the two-way flowing can be fast and stably realized, in addition, the damage cannot easily occur, and the service life is long.

A hydraulic pressure control device including a first oil passage connected to an engagement side oil chamber defined on one side of a piston included in a clutch, an engagement pressure generating valve generating an engagement pressure supplied to the engagement side oil chamber via the first oil passage; a second oil passage connected to a back-pressure side oil chamber defined on the other side of the piston, and a clutch control pressure generating valve generating a clutch control pressure supplied to the back-pressure side oil chamber via the second oil passage and operates to lower the clutch control pressure as hydraulic pressure supplied as a feedback pressure from the back-pressure-side oil chamber side becomes higher. The hydraulic pressure control device controls a differential pressure between the engagement side oil chamber and the back-pressure side oil chamber, and the first oil passage and the second oil passage are communicated with each other via a bypass oil passage having an orifice in a midway position thereof.

The patient discloses a high pressure gas filling process, and relates to an exhausting device with structural characteristics as features. A gas storage tank is filled with high pressure gas by adopting the high pressure gas filling process. The gas storage tank comprises a tank body and a piston arranged in the tank body. The tank body comprises a head end and a tail end. A gas outlet is formed in the head end of the tank body. An exhaust valve is arranged at the gas outlet. A pressure control valve and a one-way gas inlet are arranged at the tail end of the tank body. The one-way gas inlet is connected with an air compressor. A compressed natural gas bin is arranged between the piston and the head end of the tank body. An air bin is arranged between the piston and the tail end of the tank body. A seal ring is arranged on the piston. The gas storage tank can ensure constant-flow output of gas. During the processes of gas filling, exhausting and storing, the pressure difference between the air bin and the compressed natural gas bin is always not higher than 1 MPa, so that the service life of the seal ring can be prolonged.

A loader includes a hydraulically operated extension arm, a load sensor for monitoring the load condition on the loader and a hydraulic arrangement for actuation of the extension arm and / or an implement attached to the extension arm. The hydraulic arrangement exhibits at least one hydraulic cylinder with one supply line on the piston rod side and one supply line on the piston side. At least one hydraulically switchable control device is coupled between a source of fluid pressure and a hydraulic tank, on the one hand, and the supply lines on the other hand. An actuating device is coupled for routing control pressure to the control device via first and second control pressure lines. An electronic control unit is connected for effecting operation of a control pressure control device, which is coupled to at least one of the control pressure lines, in response to a load signal received from the load sensor so as to actuate the control device for achieving a slowed-down actuation of the hydraulic cylinder in conjunction with the onset of a critical load condition. Thus, a restriction of a volumetric flow is achieved in at least one of the supply lines coupled to the hydraulic cylinder.

The invention relates to a control valve for a vehicle brake system having a first fluid connection, a second fluid connection, and a decompressed connection toward the atmosphere. An adjustment spring applies a spring force to a control piston moving in longitudinal direction on the decompressed side, the control piston completely releasing a fluid connection between the first fluid connection and the second fluid connection in an initial position, and to a corresponding vehicle brake system having such a control valve. According to the invention the control valve includes a valve body having a seal seat and a sealing element coupled to a control piston. A sealing region of the sealing element interacts with the seal seat of the valve body in order to limit an effective pressure present on the second fluid connection to a predetermined maximum pressure value. The effective diameter of the control piston is greater than or equal to an effective diameter of the sealing element.

A control apparatus of a vehicle transmission includes a hydraulic circuit configured to activate at least one friction element with a control pressure, a selector configured to select a range of the transmission, a valve configured to switch a transmission shifter, and a control unit configured to direct the valve to switch the transmission shifter in response to the selected transmission range and to reduce the control pressure prior to switching the transmission shifter. A method to control a vehicle transmission includes activating at least one friction element with a control pressure, selecting a desired range of the transmission, switching a transmission range in response to the selected desired transmission range, and reducing the control pressure prior to switching the transmission range.

A hydraulic system includes an engine driven adjustable hydraulic pump which supplies fluid to a hydraulic consumer, and an electronic control unit. The adjustable pump includes flow controller for controlling a pressure difference between the consumer and the adjustable pump to a pre-determined control pressure difference. The flow controller includes an actuator controlled by the control unit, through which the pressure difference can be controlled. The electronic control unit receives an engine speed signal and controls the actuator to control the pressure difference, in order to make power delivery of the adjustable pump conform to the operating conditions of a vehicle.

The invention discloses a novel process of continuously polymerizing and producing chinlon 6 slices. The process comprises the following steps: directly a pure caprolactam raw material with a reclaimed material through concentration by conventional triple effect evaporation; carrying out reactions in a pre-reaction kettle, a pre-polymerization kettle and a post-polymerization kettle; and carrying out subsequent conventional treatment processes to produce the high quality chinlon 6 slices. Compared with the conventional methods, the low concentration reclaimed material is efficiently utilized, and the needed high concentration slurry treated by the concentration kettle can be used for continuous and stable production. The proportion adjustment range of the reclaimed material permitted in the used raw materials is great, and the water content range of the material permitted is great. The whole technical process is simple to operate and simple in equipment structure. The three reaction kettles have different technical control parameters, so that the conversion ratio of materials is effectively improved. The relative viscosity of the obtained chinlon 6 product can reach 2.4-3.6, and the strength and the tensile property of the chinlon 6 product can be widely applied to production of downstream products.

The invention concerns a system for supplying hydraulic fluid to a hydraulic system, with an operating reservoir that accepts the hydraulic fluid provided for the operation of the hydraulic system and an auxiliary reservoir connected to the operating reservoir over a hydraulic line for intermediate storage of hydraulic fluid withdrawn from the operating reservoir. According to the invention, an air pump is available that is connected on the one hand on its low pressure side to a suction line that ends in a fluid free area of the auxiliary reservoir, so that a negative pressure can be built up in the auxiliary reservoir as against the external atmospheric pressure, and that is connected, on the other hand, to a control line that is provided with a control opening that is covered by the hydraulic fluid in the operating reservoir at least before the air pump is put into operation.

A control apparatus for a power transmission system is provided. The control apparatus includes an electronic control unit. The electronic control unit is configured to, when a discharge flow rate of a mechanical oil pump is smaller than a predetermined flow rate and an electric oil pump is being driven while a vehicle is traveling, determine whether a decrease in the operating hydraulic pressure has occurred. The electronic control unit is configured to, when a first engagement device is controlled from a released state toward an engaged state, control a first control pressure such that the first control pressure in a case where a decrease in a operating hydraulic pressure has occurred is lower than the first control pressure in a case where a decrease in the operating hydraulic pressure does not occur.

A method for controlling a shift during a shift of an automatic transmission controls to complete an N to N-2 shift and an N-2 to N-3 shift simultaneously such that the shift during a shift is smoothly performed when the N-2 to N-3 shift where one frictional element is released is required to be performed during the N to N-2 shift where another frictional element is released and the other frictional element is engaged. A method for controlling a shift during a shift of an automatic transmission may overlap an N to N-2 shift where a first frictional element is engaged and a second frictional element is released with an N-2 to N-3 shift where a third frictional element is released, wherein a release of the second frictional element begins after an engagement of the first frictional element begins, and a release of the third frictional element begins after an N-2 to N-3 shift signal is detected, wherein the engagement of the first frictional element and the release of the second and third frictional elements are simultaneously completed.