41results about How to "Stable back pressure" patented technology

The invention aims at providing a slide vane compressor. The problem that backpressure oil supplying of an existing slide vane compressor is not stable is mainly solved. According to the technical scheme, negative pressure is generated in a main oil way in a spindle through a fan, and then an upper oil tube assembly is used for pumping oil from an oil pool; a backpressure oil tank is communicated with the main oil way, and the main oil way supplies pressure oil to the backpressure oil tank. Through the arrangement, oil supplying of the backpressure oil tank is more stable and reliable.

A scroll compressor in which timing of communication between a high-pressure region and a back pressure chamber and timing of communication between the back pressure chamber and a compression chamber are controlled to prevent excessive back pressure, allowing application of stable back pressure. As a result, the scroll compressor has high efficiency and high reliability. The scroll compressor has a first route (54) for intermittently interconnecting a high-pressure region (30) and a back pressure chamber (29), and also has a second route (55) for intermittently interconnecting the back pressure chamber (29) and a compression chamber (15).

The invention relates to the technical field of energy storage, and discloses a compressed air energy storage system and an energy storage method. The compressed air energy storage system comprises anair compressor, a heat exchanger, a gas storage, an air expansion, a heat regenerator and a heat accumulator. An air outlet of the air compressor communicates with a gas-phase space of the gas storage through a first heat exchanging pipeline of the heat exchanger, the gas-phase space is further connected with an inlet of the air expansion through a third heat exchanging pipeline of the heat regenerator, a heat storage medium space of the gas storage is connected with an inlet of the heat accumulator through a second heat exchanging pipeline of the heat exchanger, and an outlet of the heat accumulator is connected to the heat storage medium space through a fourth heat exchanging pipeline of the heat regenerator. According to the energy storage method of the energy storage system, energy-releasing storage is combined with a heat energy storage system, the gas storage, the heat exchanger, the heat accumulator and the heat regenerator are used for forming a heat regenerative cycle, internal heat balance and pressure balance of the compressed air energy storage system can be simultaneously realized, and the conditions of variable backpressure operation of the air compressor becoming and sliding pressure operation of the air expansion are avoided.

The invention relates to a novel excess flow valve of a tire forming vulcanizer, which is mainly used for controlling water coming in or out a water cylinder of the tire forming vulcanizer. The novel excess flow valve comprises a valve body (1), a piston (9), a cylinder rod (3) and a valve cover (8). The valve body (1) has an integrated structure, a piston hole (1.4) and a cylinder rod hole (1.3) are axially formed on the center of the valve body (1), an O-shaped sealing ring I is embedded between the cylinder rod (3) and the cylinder rod hole (1.3), an O-shaped sealing ring II is arranged between the piston (9) and the piston hole (1.4), one side of the valve body (1) is provided with a water outlet (1.1), one end of the valve body is provided with a water inlet (1.2), the other end of the valve body (1) is provided with the valve cover (8), an air inlet (8.1) is axially arranged on the center of the valve cover (8), the other side of the valve body (1) is provided with an air outlet (1.5), the valve cover (8) and the valve body (1) are fixedly connected, an O-shaped sealing ring III (5) is embedded between the hole walls of the valve cover (8) and the piston hole of the valve body (1) to seal. The novel excess flow valve has the advantages of small volume, light weight, good sealing performance and good closing performance.

The invention provides a compressor pump body, a compressor and an air conditioner. The compressor pump body comprises a main shaft, an air cylinder, an upper flange and an air pull structure. A center portion is arranged on the main shaft, and sliding piece grooves and a lubricating oil conveying channel are formed in the center portion. The air cylinder sleeves the periphery of the center portion. The upper flange sleeves the main shaft and is located on the upper end face of the air cylinder, a first back pressure groove which communicates with the sliding piece grooves is formed in the upper flange, and the conveying channel communicates with the first back pressure groove. The air pull structure is arranged on the upper flange to exhaust the gas in the first back pressure groove to the exterior of the compressor pump body. By the adoption of the compressor pump body, the situation that the oil level of lubricating oil is lower than the upper surfaces of sliding pieces can be avoided, the states that the back pressure of each sliding piece is stable, and the fluctuation is low can be guaranteed, and the operating reliability of the compressor pump body and the compressor with the compressor pump body can be improved.

The invention discloses a steam turbine condenser and an operating method thereof. The steam turbine condenser comprises a condensation box and a gear mechanism arranged in the condensation box. A first rotating cavity with an opening being rightward is arranged at the middle bottom of a second bevel gear of the condensation box. A second rotating cavity located on the upper side of the first rotating cavity is arranged in the condensation box. A third rotating cavity located on the upper side of the second rotating cavity is arranged in the condensation box. Fourth rotating cavities located on the upper side of the third rotating cavity are arranged in the condensation box in bilateral symmetry. Fifth rotating cavities located on the inner sides of the fourth rotating cavities are arranged in the condensation box in bilateral symmetry. A sixth rotating cavity located on the upper sides of the fourth rotating cavities is arranged in the condensation box. A first liquid storage cavity located on the lower side of the sixth rotating cavity is arranged in the condensation box. A condensation cavity located on the lower side of the first liquid storage cavity is arranged in the condensation box. A second liquid storage cavity located on the right side of the first rotating cavity is arranged in the condensation box.

The invention provides a pump body unit, a compressor and an air conditioning device. The pump body unit comprises a first structural body, a rolling bearing assembly, a second structural body, a third structural body and a main shaft. The main shaft penetrates through the first structural body, the rolling bearing assembly, the second structural body and the third structural body. The pump body unit comprises multiple lubricating oil lines. The multiple lubricating oil lines at least include the first lubricating oil line, the second lubricating oil line and the third lubricating oil line. The first lubricating oil line penetrates through the second structural body, a sliding sheet backpressure chamber of a rotor structure of the main shaft, a third structural body, the second structuralbody and a rolling body of the rolling bearing assembly. The second lubricating oil line penetrates through the sliding sheet backpressure chamber of the rotor structure of the main shaft, and a firstdecompression groove of the first structural body. The third lubricating oil line penetrates through the sliding sheet backpressure chamber of the rotor structure of the main shaft, the first structural body, and the rolling body of the rolling bearing assembly. With the pump body unit, the compressor and the air conditioning device, the problem that lubricating oil lines in a pump body unit in the prior art cannot meet the requirements of a pump body for lubrication is effectively solved.

The invention relates to a constant pressure by-pass valve device for wind control. A wind inlet cavity and a wind outlet cavity are arranged in the device, a valve core is glidingly disposed in the device which is equipped with a valve seat, and the wind inlet cavity and the wind outlet cavity are respectively positioned on bilateral sides of the valve seat. When closed, the valve core seals the valve seat, and when opened, the valve core disengages from the valve seat, and the wind inlet cavity and the wind outlet cavity are communicated. Additionally a regulating mechanism is disposed in the device, which is used for adjusting the compressing force that the valve core pushes against the valve seat, when pressure in pipe is larger than the pre-compression force that the valve core pushes against the valve seat, the valve core disengages from the valve seat, and the device can automatically discharge excess wind by-passing in the system from a return air pipe or an air discharging pipe. The constant pressure by-pass valve device can stabilize constant pressure by-pass valve device, avoid generation and enlargement of 'breathe type' pressure oscillation, simultaneously the device provides a stable back pressure for a constant air volume valve and a variable air volume valve at the end, and increases the actual usage accuracy.

A temperature controlling valve contains a body including a cylindrical chamber, a first opening, a second opening, a first inflow channel, and a second inflow channel; a sleeve member retained in the chamber and including at least one first orifice and second orifice; a first cover to close the first opening; a second cover applied to close the second opening; a valve core fitted into the sleeve member, wherein the first cover includes a first projected portion with a first guide tunnel; the first guide tunnel includes a first axial flowing section and a first longitudinal flowing section; the first projected portion includes a first circular back pressure fence; the second cover includes a second projected portion with a second guide tunnel; the second guide tunnel includes a second axial flowing section and a second longitudinal flowing section; the second projected portion includes a second circular back pressure fence.

The invention discloses a blown film device with a melt pump. The device comprises an extruder, a motor, a splitter plate, an extruder connecting body, a melt pump assembly, a pressure sensor, a machine head connecting body and a film blowing machine head, wherein the melt pump assembly serves as the core of the blown film device provided by the invention, the blown film device comprises a support, a gear pump, a mounting plate, a universal coupling, a speed reducer and a motor. The melt pump assembly is connected with the extruder through the extruder connecting body, and is connected with the film blowing machine head through the machine head connecting body, the pressure sensor is mounted at the top of the melt pump assembly, the splitter plate is mounted at the outlet of the extruder and connected with the extruder connecting body, the motor is connected with the extruder, and power is provided for the entire device. The device can stable a plasticizing process, lower the melting temperature, improve product yield and quality, and further prolong the service life of the extruder.

The invention relates to the technical field of sewage treatment. The invention discloses a reactive dye printing and dyeing wastewater treatment system. The system comprises a wastewater regulating tank, an anaerobic reactor, a high-pressure air desulfurization device, an aerobic biochemical tank, a secondary sedimentation tank and a physicochemical treatment tank which are sequentially connectedthrough pipelines, wherein a high-pressure spraying device is arranged at the top of the high-pressure air desulfurization device, a micro air floatation releaser connected with an air compressor positioned outside the high-pressure air desulfurization device is arranged at the bottom of the high-pressure air desulfurization device, a booster pump is arranged between the anaerobic reactor and thehigh-pressure air desulfurization device, one end of the booster pump is connected with the anaerobic reactor, and the other end is connected with the high-pressure spraying device. Sulfur ions generated in anaerobic reaction can be rapidly removed through the high-pressure air desulfurization device, biotoxicity is avoided, high-pressure air can be excessively added, desulfurization is thorough,the operation cost is low, no extra sludge is generated, and the reaction speed is high; and the high-pressure air desulfurization device can also change the anaerobic environment of the wastewater into the aerobic environment in advance, so that subsequent aerobic biochemical treatment is facilitated.

A vane rotary compressor has a cylinder. A main bearing and a sub bearing are coupled to the cylinder forming a compression space. The main and sub bearing each have a back pressure pocket on a surface facing the cylinder. The main bearing and the sub bearing radially support a rotation shaft. A roller coupled to the shaft is disposed within the compression space. The roller has circumferentially spaced vane slots, each vane slot extending from an open end on an outer circumferential surface of the roller to a back pressure chamber disposed within the roller at an opposite end of each vane slot. A plurality of vanes slide within the vane slots and divide the compression space into compression chambers. At least one of the back pressure chambers in the vane slots fluidly communicates with at least one of the back pressure pockets in the main and sub bearings.

The invention provides a bearing carrying component, a compressor and a refrigerant circulation system. The bearing carrying component includes a bearing chamber for mounting radial bearings, mountingholes coaxially communicating with the bearing chamber, fluid entry channels communicating the bearing chamber to the outside of the bearing carrying component, and fluid outflow channels communicating the mounting holes to the outside of the bearing carrying component. The bearing carrying component is conducive to supplying fluid to radial bearings and keeping the back pressure stability of theradial bearings, so that the stable operation of the compressor is facilitated.

The invention provides a method for keeping backpressure of a wafer steady. The method comprises the following steps of: putting the wafer on an electrostatic chuck; enabling the electrostatic chuck to provide one set tray voltage for the wafer; introducing gas into the wafer; enabling the backpressure of the wafer to be steady after introducing gas into the wafer; judging whether the backpressure of the wafer accords with process requirements or not after the backpressure of the wafer is steady; when the fact that the backpressure of the wafer does not accord with the process requirements is determined, adjusting the set numerical value of the tray voltage according to the backpressure of the waver, and then, returning to the second step again; and executing a treatment process when the fact that the backpressure of the wafer accords with the process requirements is determined.

The invention discloses a watering port belonging to the field of continuous steel casting. The watering port comprises a refractory material body, a pouring path, a housing and an argon blowing port, wherein the pouring path is arranged in the center of the body, the housing surrounds the body and the top, and the argon blowing port is arranged on the housing; an air path communicated with the argon blowing port is arranged between the housing and the body; and the refractory material body is divided into three layers which are respectively a venting layer, an airtight layer and a venting layer.