1542 results about "Volute" patented technology

In a multi-blade centrifugal fan in which an impeller is provided in a scroll casing in a freely rotatable manner, the scroll casing is provided with an axially expanded portion that forms an air channel at a bottom surface thereof which is expanded in a rotation-axis direction at a radially outer side of an annular flange portion which supports the impeller; and is provided, in a region of an outlet between a tongue portion and a spiral-end portion of the scroll casing in the axially expanded portion, with a protrusion that protrudes radially outward from a radially inner side surface by a predetermined amount so as to directly face an airflow in a circumferential direction.

A centrifugal pump assembly that includes an inlet housing that defines a inlet chamber and at least one inlet port in fluid communication with the inlet chamber. A volute forming part of the assembly defines an outlet port. An impeller is mounted for rotation at least partially within the volute and operative upon rotation to convey fluid from the inlet port to the outlet port. The inlet housing defines mounting structure by which the inlet housing can be secured to the volute in any one of a plurality of positions with respect to the volute so that the spatial relationship between the inlet port and the outlet port can be changed by changing the relative position of the inlet housing with respect to the volute. The inlet housing also mounts a pump insert which may be either a dedicated clean-out assembly or structure defining an axial inlet port. The inlet housing defines a mounting flange that includes a plurality of symmetrically spaced apertures and the volute includes structure that is engageable with the flange and includes a plurality of symmetrically spaced bores that are alignable with the apertures formed in the mounting flange in several relative positions. The inlet housing may also be fitted with a aperture in an inlet housing wall for defining a radial inlet port communicating directly with the inlet chamber. Alternately, the inlet housing can include a passage for communicating a spaced inlet port with the inlet chamber. The passage may be jogged. The passage should be such to make the radial inlet and the radial outlet share a common plane, perpendicular to the axis of the impeller shaft. The impeller may form part of a rotating assembly which includes a mounting structure that enables the volute to be secured to the rotating assembly in any one of several positions.

A turbocharger (66) is provided having a turbine wheel (68) and a housing (70) configured to at least partially enclose the turbine wheel. The housing may have a first turbine volute (76) including afirst inlet (78) and a second turbine volute (80) having a second inlet (82). The first and second volutes may be configured to communicate a first and a second fluid flow with the turbine wheel. Thehousing may also have a wall member (84) axially separating the first and second turbine volutes. In addition, the housing may have a valve (86) configured to selectively allow fluid in the first inlet to communicate with fluid in the second inlet.

A power generating device for use with a plumbing fixture includes: a volute configured to receive water from a water supply pipe; a stator having a plurality of blades positioned around a circumference thereof positioned within the volute; a rotor positioned within the stator; and a generator coupled to the rotor. The volute directs substantially all of the water received from the water supply pipe in a circumferential direction through the plurality of blades of the stator to the rotor, thereby causing the rotor to rotate.

An induced draught fan, including: a motor, the motor including a shaft; a volute; and a wind wheel. The volute is provided with an air intake and an air outlet. The wind wheel is arranged inside the volute. The top of the volute is provided with a through-hole. The shaft of the motor passes through the through-hole and is connected to the wind wheel. A seal ring is arranged on the volute corresponding to the through-hole. An outer side of the seal ring is provided with an annular groove. The volute is embedded in the annular groove. The middle of the seal ring is provided with a center hole. The middle of the side wall of the center hole is provided with a ring-like convex edge. The shaft passes through the center hole and contacts with the ring-like convex edge.

The invention provides a compressor surge prediction control method based on magnetic suspension axial position control. The compressor surge prediction control method comprises the steps that a surge curve is drawn by collecting compressor outlet pressure values and flow values at different rotating speeds; a function relation between pressure rise and mass flow is derived by establishing a compressor mathematical model; a compressor outlet pressure prediction model is established to determine the coordinates of an operating point of a compressor at the next moment; and when the coordinates of the operating point intersect with the surge curve, that surge will occur at the next moment is indicated, and the axial direction and the radial direction of a bearing in the compressor need to be adjusted to eliminate surge, namely, the distance between a rotor axial impeller and a volute is adjusted, and the rotor radial control current is increased to eliminate surge. According to the compressor surge prediction control method, whether surge occurs on the magnetic suspension compressor at the next moment or not can be predicted, and then a control strategy is adjusted so that the magnetic suspension compressor can always keep operating close to the right side of a surge line, the surge margin is effectively reduced, and the compressor can effectively avoid surge and can operate at the highest efficiency point.

The invention discloses a noise reduction impeller and a range hood applying the same. According to the noise reduction impeller, outer rings and / or inner rings of front-side blades of a middle disk are covered with net covers, the inner flow field of air can be alienated by the covers, and the noise reduction effect can be realized. An air inlet of a fan of the range hood is a back air inlet formed in a volute back side plate, a front ventilating port communicating with an air outlet of the fan is formed in a volute front side plate, the front ventilating port and the back air inlet are separated from each other through the middle disk of the noise reduction impeller, and a noise reduction cavity communicating with the front ventilating port is arranged in front of the fan or in front of and below the fan. The range hood adopts a back side air inlet manner, after the noise reduction cavity is arranged on the front side of the fan, the front ventilating port can be prevented from sucking in oil fume from the lower side of an oil fume collecting cover, flow noise caused by air flow turbulence in front-side space of an outer cover of the fan is eliminated, meanwhile, the way through which noise propagates outwards from the front side of the outer cover of the fan can be blocked, and besides, under the condition of high resistance of a common flue, the noise reduction cavity can also realize the pressure relief effect.

A twin-air-outlet air conditioner with a swingable air duct comprises a body (10) and a front air outlet (11) and a top air outlet (12) thereon. A centrifugal fan component (20) is arranged in the body (10). When air is out from the front side, a volute (23) of the centrifugal fan component (20) rotates and swings to an air outlet thereof and stops after communicated with the front air outlet (11) of the body (10), and the top air outlet (12) is closed at the same time. When the air is out from the top, the volute (23) reversely rotates and swings to the air outlet and stops after communicated with the top air outlet (12) on the body (10), and the front air outlet (11) is closed at this time. The volute (23) swings back and forth between the front air outlet (11) and the top air outlet (12) of the body, and discharges air after communicated with the front air outlet (11) or the top air outlet (12) of the body (10) selectively. The twin-air-outlet air conditioner is simple in structure and convenient to use.

The invention discloses an indoor unit of an air conditioner. The indoor unit of the air conditioner comprises a shell, a heat exchanger and a cross-flow fan, the heat exchanger and the cross-flow fan are mounted in the shell, and the cross-flow fan comprises a cross-flow wind wheel and a volute which are matched with each other; the volute comprises a front volute tongue which is formed into the first lateral surface of a diffusion part of the cross-flow fan and a rear volute which is formed into the second lateral surface of the diffusion part, wherein the second lateral surface is opposite to the first lateral surface, the diffusion part is downward, an air outlet is formed in the lower lateral surface of the shell, and a return air inlet is formed in each of the rear lateral surface and / or upper lateral surface of the shell; the minimum clearance between the front volute tongue and the rear volute is D, and D is more than or equal to 40 millimeters and less than or equal to 75 millimeters. According to the indoor unit of the air conditioner, the air outlet is formed in the lower lateral surface, the return air inlet is formed in each of the rear lateral surface and / or upper lateral surface, so that a room can be partially ceiled, and the air current circulation in the room is improved; and in addition, the minimum clearance D between the front volute tongue and the rear volute is optimized to regulate the size of the air outlet, the air outlet speed is optimized, and the noise is lowered.

The invention relates to the technical field of mineral processing equipment, and discloses a hammer type crusher capable of improving crushing efficiency. The hammer type crusher comprises a base, wherein the upper end of the base is fixedly connected to volute casing; a feeding hole is fixedly connected above the volute casing; and the middle part of the volute casing movable sleeves a transmission shaft. A bracket, a spring and a supporting plate are arranged, so that a hammer head hits against a sieve plate through materials while the hammer head of the crushing hammer re-crushes materialswith greater particle diameters, which drop onto the sieve plate; damages on the sieve plate by the hammer head are reduced by damping, extending and retracting of the spring, so that the sieve plateis protected, and the service life of the sieve plate is prolonged; while part of relatively great particles are pressed along with the sieve plate, the spring rebounds after the crushing hammer rotates through the materials for throwing the materials, so that the materials are directly crushed by the crushing hammer, and therefore, crushing efficiency is improved; and meanwhile, the spring can be arranged, so that the sieve plate is always in a shaking and vibrating state, and therefore, the sieving process can be quickened, and sieving effect can be improved.

An axial flow steam turbine includes an exhaust diffuser in the form of a volute (40) for diffusing the exhaust steam and turning the exhaust steam from a generally axial flow direction to a generally radial direction. The volute exit (46) may be at the bottom or to one side of the steam turbine. The volute and casing are independently mounted relative to one another on a foundation with a flexible joint therebetween.