31results about How to "No oil leakage problem" patented technology

The invention provides an online energy-saving system with two independent hydraulic stations. The online energy-saving system comprises a first hydraulic station and a second hydraulic station, wherein a first pipeline is arranged between an energy accumulator header pipe of the first hydraulic station and an energy accumulator header pipe of the second hydraulic station, and a valve M1 is arranged on the first pipeline; an oil return pipeline of the first hydraulic station is connected with an oil return pipeline of the second hydraulic station through a second pipeline, and a valve M2, a valve M3 and a valve M4 are arranged on the second pipeline, the first hydraulic station and the second hydraulic station separately; a third pipeline is arranged between the oil return pipeline and anoil discharge pipeline of the first hydraulic station, a fourth pipeline is arranged between the oil return pipeline and an oil discharge pipeline of the second hydraulic station, and a valve M7 and avalve M6 are arranged on the third pipeline and the fourth pipeline separately; and a valve M8 and a valve M5 are arranged on the oil discharge pipeline of the first hydraulic station and the oil discharge pipeline of the second hydraulic station separately. The online energy-saving system with the two independent hydraulic stations has the beneficial effects that one hydraulic station can be used for two production lines by only switching on or switching off the valves, the design is ingenious, the structure is simple, the oil expelling problem does not exist when power is supplied after combination, and energy saving is achieved finally; and the production efficiency can be guaranteed, and one hydraulic station can be used as a standby machine.

The invention discloses a far infrared intelligent warmer and a control circuit thereof. The warmer comprises multiple radiating fins arranged in parallel, an electric cabinet mounted at the front ends of the radiating fins and heating bodies located in the radiating fins, wherein the upper part of the radiating fins is hinged with a pair of handles convenient to carry and for hanging clothes; a base is arranged at the lower part of the radiating fins; the electric cabinet is provided with a control circuit for controlling the heating of the radiating fins; and the control circuit comprises a control module, a display module, a key module, a room temperature sampling thermistor, a radiating fin temperature sampling thermistor, a full-power and half-power switch module and a heating body group. The warmer disclosed by the invention has the characteristics of simple structure, short preheating time, low manufacturing cost, long service life, light weight and the like, and is convenient to use, safe and reliable, low-carbon and healthy and energy-saving and environment-friendly.

The invention relates to an assembly process and provides a brushless motor assembly process, which comprises the following steps: 1) assembling a rotor assembly, wherein assembly of the rotor assembly comprises assembly of an end cover assembly and assembly of a rotor with magnetic steel; 2) assembling a stator assembly, wherein in the stator installation process, heating a housing to expand the housing first, and then, placing stator assembly in the housing; 3) installing the rotor assembly in the stator assembly; and 4) assembling induction magnetic steel to a rotor shaft. The provided brushless motor assembly process can ensure stability of a brushless motor, good consistency of motor performance and small variation, and solves the technical problems that in the brushless motor assembly process in the prior art, since a rotor plays up and down, and the rotor assembly and the stator assembly are poor in concentricity, the motor performance consistency is poor, stability is poor and variation is large.

The present invention is one kind of centerpiece gimbal with improved structure and thus simple manufacture, light running and less noise and suitable for high speed and light load running. Between the outer ring and the centerpiece head, homogeneous circular soft wear resisting layer is formed through coating nylon material onto the inner wall and the bottom of the centerpiece outer ring. In case that there is inclined annular overtravel slot between the inner wall and the bottom, the overtravel slot is coated with soft wear resisting layer. Annular slot in the root part of the centerpiece head is filled with the soft wear resisting layer. The present invention has the features of simple structure, easy manufacture, compact structure, low running noise, etc. and is especially suitable for high speed and low load centerpiece gimbal.

This application provides a bird-strike-resistant aircraft external auxiliary fuel tank leading edge structure, including a fairing, a buffer baffle, a plug body, a front skin I and a front skin II, the fairing is a variable-section thick-walled structure, and the front skin Ⅰ and the fairing are connected by connecting pieces to ensure that the assembly step difference between the front skin Ⅰ and the outer surface of the fairing is less than 1mm; the buffer baffle is located behind the fairing and is used to separate the front skin Ⅰ from the fairing so that the front skin Ⅰ and the fairing Fuel in its rear structure cannot enter the fairing. The structure design of the application is simple, the manufacture and assembly are very convenient, it can effectively resist the impact of flying birds, and ensure that the auxiliary fuel tank will not cause oil leakage or parts fall off, which will affect the flight safety of the aircraft.

The invention discloses a hydraulic ejection structure of a plastic mold. The hydraulic ejection structure comprises an oil hydraulic cylinder arranged on a mold foot of the plastic mold, an oil way arranged in the mold foot and communicated with the oil hydraulic cylinder, and a connecting rod; and one end of the connecting rod and a stretchable end of the oil hydraulic cylinder are fixed, and the other end of the connecting rod and an ejection plate of the plastic mold are fixed. Compared with the prior art, the hydraulic ejection structure of the plastic mold has the beneficial effects thatthe oil way is arranged in the mold foot of the plastic mold, and therefore an oil pipe is prevented from being damaged by pressing in the mold installing, mold detaching and transporting process; the oil pipe is arranged in the mold foot, the space is reduced, and interference with other structures of the outer side of the mold can be avoided; the service life is longer than that of the oil pipe; and after the oil hydraulic cylinder is installed, oil hydraulic cylinder detachment is not needed in the follow-up maintenance and mold detaching, and the problem of oil leakage does not exist.

The invention provides a water turbine blade internal energy drive adjusting structure which comprises a pressure energy storing system, an operating system and an execution system, wherein the pressure energy storing system comprises an oil tank, an energy storing device, an oil pump and a pressure automatic control unit, the operating system comprises a digital valve and a displacement sensor, and the execution system comprises an operation connecting arm and a blade servomotor. The pressure energy storing system, the operating system and the execution system are installed in a blade hub. The energy storing device, the oil pump and the digital valve are distributed horizontally in a concentric mode and are connected to the blade servomotor through oil conveying pipelines. An access control system is introduced by electric signals of a blade through an inner cavity cable sliding ring of a main shaft so as to conduct control. The problems that sealing is not good and oil is leaked in the process of conveying external hydraulic energy to a rotating energy receiving part, and oil pressure is limited in rotary sealing conveying operations are solved due to the fact that the pressure energy storing system, the operating system and the execution system are installed in the blade hub and used for adjusting the blade.

The utility model relates to a control device for repeatedly in place hydraulic equipment, which is composed of a two-position two-way oil return rotary valve, a double control one-way valve and a hydraulic control one-way valve. The lower chamber of the oil cylinder of the device is provided with a low-pressure accumulator, and the upper chamber of the oil cylinder is provided with a high-pressure accumulator. The operating handle is placed in a handle pipe seat, which is provided with a universal coupling capable of controlling the oil return rotary valve, and a power arm for driving the oil pump is fixed on the handle pipe seat. Because the present invention has high and low-pressure accumulators, when the high-pressure accumulator releases energy to the upper chamber of the oil cylinder and the pressure drop piston is in place, the oil in the lower chamber enters the low-pressure accumulator to store energy and is used to lift the piston again. It realizes full hydraulic automatic position, and there is no oil leakage problem at the breathing port of the fuel tank. The control device composed of oil return rotary valve and two one-way valves has reliable sealing on time. The pump and valve are jointly controlled, and the operating handle can make the oil pump arbitrarily supply oil to the upper and lower chambers of the oil cylinder, realizing repeated positioning without load.

A normal-temperature self-gas-sealing device for a bearing comprises a static seal part, a movable seal part and the bearing. The static seal part comprises a bearing pedestal bottom cover and a bearing pedestal upper cover. The bearing pedestal bottom cover is composed of a bottom plate inner lip part, a bottom plate outer lip part and a bottom plate. The bearing pedestal upper cover is composed of an upper cover inner lip part, an upper cover outer lip part and a connection plate. The upper cover outer lip part and the bottom plate outer lip part are connected in an extending manner. A lubrication chamber used for storing lubricating oil is formed between the bearing pedestal bottom cover and the bearing pedestal upper cover. The movable seal part comprises a shaft lip part A and a shaft lip part B which are arranged on a stirring shaft in a sleeving manner. The shaft lip part A is located between the bottom plate inner lip part and the bottom plate outer lip part in the radial direction. The shaft lip part A, the bottom plate outer lip part and the upper cover outer lip part are buckled in a staggered manner in the axial direction. The shaft lip part B and the upper cover inner lip part are buckled in a staggered manner in the axial direction. The upper cover inner lip part is located in the shaft lip part B. The bearing is located between the bottom plate inner lip part and the shaft lip part A in the radial direction. The normal-temperature self-gas-sealing device can be suitable for high-sped or low-speed stirring reactions and can be suitable for both inert gas shielding reactions and reaction systems with toxic and harmful gas.