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CN-121993422-A - Energy-saving refrigerating device based on water chilling unit

CN121993422ACN 121993422 ACN121993422 ACN 121993422ACN-121993422-A

Abstract

The invention relates to the technical field of refrigeration of water chilling units and discloses an energy-saving refrigeration device based on a water chilling unit. The centrifugal pressurizing wheel is divided into a pressurizing part and a guiding part, and an oblique guiding piece is arranged on the guiding chassis. The key is that the inclination direction of the radial pressurizing blade is opposite to the inclination direction of the inclined guide piece, and when the medium is thrown out by the radial pressurizing blade at high speed, the medium has strong homodromous rotational flow. The opposite inclined oblique guide plate plays excellent roles of stator racemization and flow field reconstruction, can smoothly receive high-speed media, efficiently converts redundant tangential kinetic energy into static pressure energy, greatly eliminates impact flow loss of inter-stage fluid, provides an optimal pre-rotation angle and higher inlet initial speed for the next-stage impeller, and improves the overall efficiency of multistage pressurization.

Inventors

  • LIU XUNJIAN
  • LI CUICUI
  • LI KAI
  • PENG TIANHUI

Assignees

  • 深圳市丹耐斯机械有限公司

Dates

Publication Date
20260508
Application Date
20260318

Claims (8)

  1. 1. The energy-saving refrigerating device based on the water chilling unit comprises a mounting base (1) and is characterized in that a power motor (2) is fixedly assembled on one side of the top of the mounting base (1), a supporting vertical frame (3) is fixedly assembled on the other side of the top of the mounting base (1), a cascading pressurizing cylinder (4) is fixedly assembled on the top of the supporting vertical frame (3), centrifugal pressurizing wheels (5) and a static heat dissipation seat (6) are arranged in an inner cavity of the cascading pressurizing cylinder (4), and the static heat dissipation seat (6) is arranged between the two groups of centrifugal pressurizing wheels (5) at intervals.
  2. 2. The energy-saving refrigeration device based on the water chiller according to claim 1, wherein the cascade pressurizing cylinder (4) comprises a cylindrical shell (401), a medium outlet (402) and a medium inlet (403) are fixedly arranged at the top of the cylindrical shell (401), a cooling liquid interface (405) is further arranged at the top of the cylindrical shell (401), and a rotary driving shaft (404) which is connected in a rotating mode is arranged in the axis direction of the cylindrical shell (401).
  3. 3. The energy-saving refrigerating device based on the water chiller according to claim 2, wherein the centrifugal pressure wheel (5) is fixedly assembled through a rotary driving shaft (404) and rotates along with the rotary driving shaft (404), and the rotary driving shaft (404) is fixedly assembled with the output shaft of the power motor (2).
  4. 4. The energy-saving refrigeration device based on the water chiller according to claim 1 is characterized in that the centrifugal pressurizing wheel (5) comprises a pressurizing part and a guiding part; The pressurizing part comprises an impeller substrate (501), an axial through hole (502) is formed in the axial direction of the impeller substrate (501), an annular feed port (503) is formed in the outer edge of the axial direction of the impeller substrate (501), an inner runner cavity (504) is formed in the outer edge of the impeller substrate (501) in the side wall direction, the inner runner cavity (504) is communicated with the annular feed port (503), and radial pressurizing blades (505) are annularly arranged in the penetrating space of the inner runner cavity (504) and the annular feed port (503); The guide part comprises a guide chassis (507), an integrally formed flow gathering coating layer (508) is coated on one side of the guide chassis (507) close to the radial pressurizing blade (505), oblique guide sheets (510) are annularly arranged on one side of the guide chassis (507) far away from the radial pressurizing blade (505) along the axis, and an inner ring guide groove (509) is formed in the inner side of the outer ring of the guide chassis (507).
  5. 5. The energy-saving refrigeration device based on a water chiller according to claim 4 wherein the pressurizing section further comprises a sealing gasket (506), wherein the sealing gasket (506) is arranged between the rotary driving shaft (404) and the axial through hole (502) and is used for sealing a gap between the axial through hole (502) and the rotary driving shaft (404); The direction of inclination of the radial pressing blade (505) in the pressing section is opposite to the direction of inclination of the oblique guide piece (510) in the guide section.
  6. 6. The energy-saving refrigeration device based on the water chiller set of claim 1, wherein the static heat dissipation seat (6) comprises a limit heat dissipation part and a limit connection part; The limiting heat dissipation part comprises a heat dissipation main body (601), wherein the heat dissipation main body (601) comprises a limiting partition plate (602) and an outer edge shroud (605) for cladding the outer edge of the centrifugal pressure wheel (5), and an outer wall circulation hole (604) is formed in the outer wall of the heat dissipation main body (601); The limit connection part comprises a connection assembly (603), and the connection assembly (603) consists of a limit baffle plate (602) and an outer edge shield (605).
  7. 7. The energy-saving refrigeration device based on the water chiller according to claim 6, wherein the abutting parts of the limiting heat dissipation parts and the limiting connection parts are provided with through holes for forming a liquid circulation channel; A limiting groove is formed in the inner cavity of the cylindrical shell (401), and the static heat dissipation seat (6) is sleeved with the limiting groove in the inner cavity of the rotary driving shaft (404) through the protruding portion of the heat dissipation main body (601).
  8. 8. The energy-saving refrigeration device based on the water chilling unit according to claim 1, wherein the tail ends of the centrifugal pressurizing wheels (5) are further provided with tail end pressurizing wheels (7), and the tail end pressurizing wheels (7) are enlarged plates of pressurizing parts in the centrifugal pressurizing wheels (5).

Description

Energy-saving refrigerating device based on water chilling unit Technical Field The invention relates to the technical field of refrigeration of water chilling units, in particular to an energy-saving refrigeration device based on a water chilling unit. Background The centrifugal pressurizing device is widely applied to energy-saving refrigerating systems such as water chilling units and the like and is mainly used for continuously pressurizing and conveying fluid media. In existing multistage centrifugal pressurizing devices, the following technical bottlenecks generally exist: In the multistage pressurization process, the medium discharged by the impeller of the previous stage has extremely high tangential velocity and radial kinetic energy. The existing equipment usually adopts a simple bend to carry out interstage backflow, so that strong vortex, flow removal and impact loss are generated when fluid enters the next-stage impeller, kinetic energy cannot be effectively converted into static pressure, and great hydraulic/pneumatic energy dissipation is caused. In the continuous centrifugal pressurizing process, a large amount of heat is generated due to high-speed shearing friction and compression effect, the traditional equipment is usually cooled by the water jacket only outside the shell, the cooling efficiency is low, the temperature of internal fluid is gradually increased, the ideal isothermal pressurizing process is deviated, and the power consumption of the later stage pressurizing is greatly increased. When the fluid subjected to multistage pressurization is finally discharged into a medium outlet, congestion and backflow resistance are easily formed at an exhaust/liquid discharge port due to mutation of the cross section and the direction of a flow channel, so that the volumetric efficiency of the whole machine is reduced. Therefore, there is a need for an energy-saving refrigeration pressurization device that can realize efficient inter-stage flow field reconstruction, has inter-stage in-situ heat dissipation function, and discharges smoothly. Disclosure of Invention The invention provides an energy-saving refrigeration device based on a water chilling unit, which solves the problems set forth in the background technology. The invention provides the technical scheme that the energy-saving refrigeration device based on the water chilling unit comprises a mounting base, wherein a power motor is fixedly assembled on one side of the top of the mounting base, a supporting vertical frame is fixedly assembled on the other side of the top of the mounting base, a cascade pressurizing cylinder is fixedly assembled on the top of the supporting vertical frame, a centrifugal pressurizing wheel and a static heat dissipation seat are arranged in an inner cavity of the cascade pressurizing cylinder, and the static heat dissipation seat is positioned between the two groups of centrifugal pressurizing wheels. As a preferable technical scheme, the cascade pressurizing cylinder comprises a cylindrical shell, wherein a medium outlet and a medium inlet are fixedly assembled at the top of the cylindrical shell respectively, a cooling liquid interface is further arranged at the top of the cylindrical shell, and a rotary driving shaft which is in rotary connection is arranged in the axis direction of the cylindrical shell. As a preferable technical scheme of the invention, the centrifugal pressurizing wheel is fixedly assembled through a rotary driving shaft and rotates along with the rotary driving shaft, and the rotary driving shaft is fixedly assembled with the output shaft of the power motor. The centrifugal pressurizing wheel comprises a pressurizing part and a guiding part; The pressurizing part comprises an impeller substrate, an axial through hole is formed in the axial direction of the impeller substrate, an annular feed port is formed in the outer edge of the axial direction of the impeller substrate, an inner runner cavity is formed in the outer edge of the impeller substrate in the side wall direction, the inner runner cavity is communicated with the annular feed port, and radial pressurizing blades are annularly arranged in the penetrating space of the inner runner cavity and the annular feed port; the guide part comprises a guide chassis, an integrally formed flow gathering coating layer is coated on one side of the guide chassis, close to the radial pressurizing blades, oblique guide plates are annularly arranged on one side of the guide chassis, far away from the radial pressurizing blades, along the axis, and an inner ring guide groove is formed in the inner side of an outer ring of the guide chassis. The pressurizing part also comprises a sealing gasket, wherein the sealing gasket is arranged between the rotary driving shaft and the axial through hole and is used for sealing a gap between the axial through hole and the rotary driving shaft; the inclination direction of the radial pressurizing blade in