37results about How to "Achieving a static seal" patented technology

The invention discloses a high-pressure controllable slide-valve type mechanical combined sealing system. The system comprises a controllable slide valve stationary seal assembly and a rotating mechanical seal assembly; the controllable slide valve stationary seal assemble comprises a slide valve gland (13), a slide valve (11) and a tapered shaft sleeve (12) sheathed on a shaft shoulder, the tapered shaft sleeve (12) is positioned inside the slide valve gland (13), the slide valve (11) which is partially positioned in a flange (16) is hermetically connected with the tapered shaft sleeve (12) in a sliding way, and the flange (16) is provided with a pressure source channel I (161) and a pressure source channel II (162) which are respectively used for controlling the slide valve (11) to slide leftwards or slide rightwards; the rotating mechanical seal assembly comprises a rotating seat (9) which is fixedly connected with a shaft sleeve (10), a rotating ring (17) and a stationary ring (7) which are closely jointed on a seal face and the like. The sealing system can help greatly reduce and avoid leakage of dangerous fluid and serious accidents.

The invention relates to the technical field of dynamic sealing devices and discloses a multipoint compression high-temperature-resistant dynamic sealing device. According to the device, a sealing compression ring presses a graphite packing set in the axial direction to enable the graphite packing set to be in close contact with the sealing surface of a fixed body and flexibly fixed to the fixed body through an axial fastening bolt; a spring pressing piece is of a wavy structure, one end of the spring pressing piece is fixed to a radial bolt hole of the sealing compression ring through a radial fastening bolt, the other end of the spring pressing piece is suspended in the air and is in contact with and fixed to the graphite packing set flexibly through a wave trough, and the spring pressing piece presses the graphite packing set tightly and evenly in the radial direction to enable the inner surface of the graphite packing set to be in close contact with the sealing surface of rotary equipment. According to the device, axial static sealing and radial flexible dynamic sealing are achieved for the rotary equipment, and due to the fact that the graphite packing set adopted is good in high temperature resistance, the service life of the sealing device can be prolonged. The device is suitable for large high-temperature rotary equipment and has good market prospects.

The invention discloses a magnetic drive pump for liquefied natural gas delivery, which comprises a center shaft, an internal magnetic rotor, a connection seat and an external magnetic rotor. The internal magnetic rotor and the connection seat surround the center shaft, the external magnetic rotor surrounds the internal magnetic rotor, the internal magnetic rotor is fixedly connected with the center shaft, the connection seat is connected with the center shaft through a first bearing, a spacer sleeve is arranged between the internal magnetic rotor and the external magnetic rotor and is fixedly connected with the connection seat, and a seal gasket is arranged at the joint between the spacer sleeve and the connection seat. Besides, the spacer sleeve and the connection seat are connected fixedly and incapable of moving relative to each other, the seal gasket is arranged at the joint between the spacer sleeve and the connection seat, and then static seal between a pump and a medium can be realized and the pump is safe and reliable in structure, so that the possibility of medium leakage is reduced, unsafe factors generated in delivery process of liquefied natural gas are reduced greatly and safety and reliability of the pump in running are improved. In addition, structures below a mounting platform of the magnetic drive pump can be submerged under liquid level completely, and accordingly heat insulation measures to pipelines when the magnetic drive pump is mounted on the ground and auxiliary cost for the pipeline is lowered.

The invention discloses a supporting mechanism, which comprises a mounting plate, a bearing plate, a connecting piece and a stopper. The connecting piece and the stopper are parallel to each other and connected between the mounting plate and the bearing plate; the connecting piece comprises a connecting post and an elastic element; the upper end of the connecting post is movably connected with the bearing plate, and the lower end of the connecting post is movably connected with the mounting plate; the elastic element is compressively sleeved outside the connecting post; the upper end of the elastic element is pressed against the bearing plate, and the lower end of the elastic element is pressed against the mounting plate; the lower end of the stopper is connected with the mounting plate, and the upper end of the stopper extends along the direction of the bearing plate; and the upper end of the stopper is also provided with a soft cushion pad. The supporting mechanism has the advantages of buffering and damping functions, capability of preventing the bearing plate from being rigidly and mechanically contacted with a borne subject and preventing the borne subject from being damaged, simple structure and convenient maintenance. Moreover, the invention also discloses an automatic elevating device having the supporting mechanism.

The invention relates to a water lubrication deep-water passive dual-end-face stern shaft tube sealing device, which comprises a shell connected with a boat body, and is characterized in that: an inner cavity and an outer cavity are formed in the shell along the axial direction; an end face sealing device is arranged in each cavity, so that two-stages of end face sealing devices are constructed; each end face sealing device comprises a static ring and a movable ring; a static sealing ring is arranged on the outer end face of each static ring; the inner end face of each static ring is hermetically connected with an end cover, and is configured together with a spring arranged on the end face of the end cover; each movable ring is fixedly connected with a stern shaft; a movable sealing ring arranged on the inner end face of each movable ring is configured together with the static sealing ring on the outer end face of the corresponding static ring; water inlets are formed in the inner and outer cavities respectively; and the water inlets of the inner and outer cavities are communicated with a cooling pressure water source respectively. In a normal state, one end face sealing pair of the inner cavity works; when an inner cavity seal fails, one end face sealing pair of the outer cavity takes effect by using the passive physical characteristic of pressure difference, so that the sealing performance of a stern shaft system and the running safety of a submersible vehicle are ensured fully under the condition of deep water.

The invention relates to the technical field of explosion-proof motors, in particular to a magnetofluid sealed positive pressure explosion-proof motor. The motor comprises a shell, a rotor, retainers,a positive pressure system and a protective shell; the rotor is installed in the shell, and the retainers sleeve the outer sides of the two ends of the rotor; a part, located outside the shell, of arotor rotating shaft is fixedly sleeved with a plurality of outer convex rings. The two retainers are embedded into embedding grooves in the two sides of the shell respectively; permanent magnets arearranged in the retainers; the shell is connected with the positive pressure system; the positive pressure system comprises a gas conveying pipe, a gas pressure detector and a protective gas tank; thegas conveying pipe is embedded in the outer wall of the shell; the other end of the gas conveying pipe is communicated with the protective gas tank. By the adoption of the technical scheme, a sealingring and lubricating oil are arranged between the outer end faces of the retainers and the shell in the sealing system, the sealing ring of the sealing system and the shell can achieve static sealing, an outer convex ring and an inner concave ring are matched with each other to form a zigzag dust blocking face, and the dust blocking effect is achieved.

The invention relates to a lifting hook type shot blasting machine, which mainly solves the problems of the existing lifting hook type shot blasting machine that the sealing effect is poor; the workshop environment is polluted; the driving lifting hook rotation is not reliable; automatic control over the workpiece mounting and dismounting cannot be realized. The lifting hook type shot blasting machine is characterized in that a lifting hook comprises an inner lifting hook (3) and an outer lifting hook (4); a slide plate (8) and a sealing baffle plate (9) are sequentially connected onto a piston rod of a first air cylinder (5); the inner lifting hook (3) penetrates through a notch (2) and is positioned in a shot blasting chamber (1); a piston rod of a second air cylinder (7) is connected with a slippage trolley (21); a third air cylinder (22) and a lifting slide plate (23) are arranged on the slippage trolley (21); a piston rod of a fourth air cylinder (24) is connected with the outer lifting hook (4). The lifting hook type shot blasting machine has the advantages that an inner and outer two-group lifting hook mutual bearing structure and a sealing baffle plate structure are used, so that the notch above the shot blasting chamber can be completely covered; the sealing effect is good; the workshop environment is not polluted; the automatic workpiece mounting and dismounting can be realized.

The invention belongs to the technical field of shoe washing machines, and aims at solving the problem that damage to a power mechanism is easily caused due to the lack of a sealing mechanism in an existing shoe washing machine. For this, the invention provides a sealing mechanism used for a shoe washing machine, and the shoe washing machine. The shoe washing machine comprises a fixed member and aslide mechanism arranged on the fixed member in a slide manner, wherein the sealing mechanism is arranged between the slide mechanism and the fixed member, and used for sealing the fixed member. According to the sealing mechanism used for the shoe washing machine, and the shoe washing machine, through the arrangement for the sealing mechanism between the slide mechanism and the fixed member, sealing for the fixed member can be realized, so that in a shoe washing process of the shoe washing machine, splashing water cannot enter into the power mechanism through the fixed member, and then damageto the power mechanism due to dip dyeing of water is avoided; and meanwhile, the drive efficiency and the service life of the power mechanism cannot be influenced.

The invention discloses a chemical mechanical system with a T-type paddle horizontal reactor. A horizontal stirring paddle of a horizontal stirrer is a T-type paddle and is prepared from stainless steel. A distance between the tail end of the T-type paddle and the inner wall of a horizontal tank is in a range of 3-5mm and is larger than the maximum particle diameter of the stirred material. The system comprises the 96 T-type paddles divided into 24 groups uniformly distributed along an axial direction of a horizontal stirring shaft at equal intervals and a ratio of the thickness to length of the T-type paddle is 1: 10. The four T-type paddles in each group are uniformly distributed along the circumferential direction of the horizontal stirring shaft at an angle of 90 degrees. The two adjacent groups of the T-type paddles are arranged at 0 degree along the circumferential direction of the horizontal stirring shaft. The back surface of each T-type paddle is provided with reinforcing ribs.

The invention discloses a chemical mechanical system with a magnetic torque adjustable reactor. A first reactor is an electromagnetic driven reactor with a magnetic torque adjustment function. A stirrer comprises a magnetic driver, a vertical stirring shaft and a vertical stirring paddle. A vertical stirring paddle is arranged on the vertical stirring shaft. The magnetic driver is connected to thevertical stirring shaft and drives the vertical stirring shaft to rotate so that a stirring function is realized.

The invention discloses a rotary cylinder piston compressor. The rotary cylinder piston compressor comprises a cylinder sleeve, an upper supporting plate and a valve cover, wherein the upper supporting plate and the valve cover are arranged at the two ends of the cylinder sleeve, a valve plate is arranged on the inner side of the valve cover, a cavity is defined by the valve plate, the cylinder sleeve and the upper supporting plate, a rotating component is arranged in the cavity, a rotating shaft bearing is arranged on the outer side of the valve cover, and a rotating shaft penetrates through the rotating shaft bearing to drive the rotating component to rotate; the rotating component comprises a piston connecting rod, the piston connecting rod is arranged on the air cylinder wall face in a rotary cylinder in a sleeving mode, needle bearings capable of rolling along the inner wall face of the cylinder sleeve are arranged at the two ends of the piston connecting rod, and the rotary cylinder is arranged on the rotating shaft in the sleeving mode; air cylinder end covers are symmetrically arranged on the two sides of the rotary cylinder and provided with air inlet and outlet ports. The rotary cylinder drives the piston connecting rod to rotate relative to the cylinder sleeve, and meanwhile the piston connecting rod reciprocates relative to the rotary cylinder, so that volumes of the two sides of the piston connecting rod in the rotary cylinder are changed, and air suction, compression and exhaust are achieved. According to the rotary cylinder piston compressor, quick-wear parts are reduced, the structure of the compressor is simplified, the overall stress of a piston is small, the operation is stable, and the reliability of the compressor is improved.

The invention discloses a mixing chemical mechanical system with a function of multi-sensor monitoring. The mixing chemical mechanical system comprises a master control station and sensors. A master control computer receives signals from the sensors through a sampling circuit, a filter circuit, an amplifier, a holding circuit and an A/D converter. The sensors comprise a rotation speed sensor, a thermometer, a pressure sensor, a vibration sensor and a noise sensor.

The invention provides a magnetic force driving mechanism for a valve. The mechanism comprises a valve rod, wherein the valve rod is supported in a left-end disc through a bearing; the left-end disc is connected with a right-end disc through a connecting sleeve; an outer magnetic cylinder body which is located inside the connecting sleeve is supported on the right-end disc through a bearing; the inside of the outer magnetic cylinder body is provided with an inner rotor which is installed on the valve rod; an isolation hook which is fixedly connected with the left-end disk is arranged between the inner rotor and the outer magnetic cylinder body; a seal pad is arranged between the isolation hook and the left-end disc; inner magnetic blocks are inlaid on the circumferential surface of the outside of the inner rotor; and outer magnetic blocks matched with the inner magnetic blocks are inlaid on the circumferential surface of the inside of the outer magnetic cylinder body. When the magnetic force driving mechanism is used, the valve rod is connected with the valve core of the valve; the left-end disc is fixedly connected with a mounting seat arranged on a tank body in a system; the inner rotor located on the end head of the valve rod is covered in the isolation hook, thus static seal is achieved; and when the outer magnetic cylinder body is rotated, the inner rotor rotates under the action of the magnetic blocks, so as to realize non-contact type dynamic transfer and no medium leakage, thus the magnetic force driving mechanism provided by the invention is safe and reliable, maintenance frequency is reduced, and production efficiency is improved.

The invention discloses a chemical mechanical system with an inner baffle horizontal reactor. The horizontal reactor comprises a horizontal tank, a horizontal agitator and a horizontal jacket. The horizontal jacket is arranged in the middle of the horizontal tank. The horizontal jacket and the horizontal tank form a closed annular sandwich layer. Four baffles are arranged in the horizontal tank, are uniformly arranged at axial positions of the reactor at equal intervals, are semicircular and respectively form angles of 0 degree, 90 degrees, 180 degrees and 270 degrees with the plane. A ratio of the baffle thickness to diameter is 1: 20.

The invention discloses a pipe hot air heating box which comprises an inner barrel and an outer barrel. The outer barrel comprises an air inlet barrel section and an air return barrel section. The inner barrel comprises a heating barrel section and a heat preservation barrel section. A through hole is formed in the heating barrel section. An annular contracted conical surface is arranged on the heating barrel section. A heating cavity is formed between the outer side face of the contracted conical surface and the air inlet barrel section. A heating air port is annularly formed in the inner side wall of the heating cavity. A heat preservation cavity is formed between an inner hole of the heat preservation barrel section and a pipe penetrating through the through hole. An air return cavity is formed between the heat preservation barrel section and the air return barrel section. The downstream end of the heat preservation cavity communicates with the air return cavity. The air return cavity communicates with an air return pipe opening. The pipe hot air heating box is reasonable in structure, quite convenient to assemble and disassemble, reliable in heating effect, higher in heat utilization rate and smaller in heat loss. In addition, the invention further discloses a hot air heating device using the hot air heating box, and the hot air heating device has the same effects as the pipe hot air heating box.

The invention relates to a microcarrier bioreactor tank inner and outer pipeline channel sealing connection device. The device comprises a hard pipe, a sealing connection seat, a sealing connection sleeve and a compression nut. The hard pipe is fixed on a microcarrier frame in a reaction tank, and one end of the hard pipe penetrates through a top cover of the reaction tank; the top cover is provided with a threaded connector, and the threaded connector is connected with the sealing connecting seat. The sealing connecting sleeve which is inserted on the hard pipe in a sleeving manner is arranged in the sealing connecting seat; the compression nut is pressed on the sealing connecting sleeve; the compression nut is connected with the sealing connecting seat; and sealing rings are arranged in the sealing connecting seat and the sealing connecting sleeve. The internal and external pipelines of a microcarrier bioreactor tank can be conveniently connected in a static sealing mode, and compared with the existing dynamic sealing connection mode, the device is safer and more reliable, and the structure is simpler.