CN2262123Y - Circulation pump for hot and cold water - Google Patents

Abstract

The utility model relates to a circulation pump for hot and cold water, relating to a pump driven by electricity. The utility model comprises a motor and a coaxial pump at the lower part of the motor; a back cover is arranged on the pump body, and the back cover and the pump body together form a pump chamber; the shaft of the motor extends into the inner of the pump chamber, and the shaft end of the shaft is fixedly provided with an impeller; sealing rings are embedded on the pump body and the back cover; a stator ring and a moving ring are embedded on the back cover and the shaft; the impeller structure is also provided with a rear sealing ring; the position adjacent to the shaft on a rear cover plate is drilled with a hydraulic equilibrium mechanism composed of uniformly distributed balancing holes. The utility model can be matched with the characteristics of a flow device, and has the advantages of small power matching, energy saving, safe operation, long service life and low noise; the utility model is suitable for both high and low storeys.

Description

Heat, cold water circulation pump

A kind of heat, cold water circulation pump are used electrically driven (operated) pump in the Heating,Ventilating and Air Conditioning (HVAC) chiller plant system especially for fed sheet of a media temperature≤130 ℃.

National economy all departments extensively need the hot water and the cold water circulation pump of fed sheet of a media temperature≤130 ℃, but there is not suitable product so far, have to for a long time substitute with general clean waterpumps such as Type B, IS types, the long-standing problem and shortage of actual use is: 1, pump performance and trailing technological process device characteristic do not match, seriously there is the low load with strong power phenomenon, causes a large amount of energy wastes and considerable economic loss for country and user.2, China's tall building is more and more, and common clean waterpump uses with this understanding, and shaft sealing leakage is serious, and pump housing insufficient strength is used dangerous, unreliable; The high static pressure of tall building makes the size and Orientation of pump axial force, and great changes will take place, and it will have a strong impact on the working life of pump and motor.3, the unit vibration noise is big, influences the peacefulness of staff and surrounding resident.

The purpose of this utility model is to overcome the problem and shortage that above-mentioned prior art exists, a kind of optimization impeller, pump housing design are provided, make it pump characteristics and trailing flow path device characteristic coupling, match power is little, safe and reliable to operation, low noise, low energy consumption, the water-circulating pump of the vertical structure that the life-span is long.

The utility model is realized with following technological scheme: comprise the pump coaxial with it that motor and below thereof are provided with, the pump housing that is made of intake chamber and pumping chamber is provided with bonnet and constitutes pump chamber jointly, the shaft extension of motor is gone in the pump chamber, be positioned on the axle head of pump chamber and fixedly mount impeller, be respectively intake chamber and pumping chamber before and after the impeller, axle on the pump housing and on the bonnet in insert seal ring, bonnet and the pump chamber is gone up insert stationary ring and rotating ring respectively, increasing back sealing ring also is set in blade wheel structure, and the position near axle on its back shroud is drilled with uniform equalizing orifice.

Working principle: when motor energising rotation, because pump is coaxial, place the impeller of axle head to rotate thereupon, liquid in the impeller flows to pump housing pumping chamber and forms certain pressure under the effect of rotary centrifugal force be that supercharging is transported to drain opening, meanwhile, the water of pump housing suction chamber flows into impeller automatically, and motor rotates continuously, impeller constantly with water from the inspiration of pump suction chamber, enter again pumping chamber to the outlet.According to above-mentioned working principle, be connected in the recycle pump of closed system of pipes, be full of water with pipe-line system in the driving front pump, the back pump of driving will increase the water inlet pipe road system that presses.Because the continuity and the incompressibility of water, the water in the pipe-line system flows back to the suction chamber of pump again, through pump supercharging output, so renews circulation again.

The beneficial effect that the utility model had: 1, optimize impeller, pump housing design, make it pump performance and flow path device characteristic coupling rationally, solved the phenomenon of the low load with strong power after substituting with common clean waterpump, match power obviously reduces, save the energy, can be country every year and save more than one hundred million degree electric energy.2, set up increasing back sealing ring and on impeller, be drilled with uniform equalizing orifice, utilize the hydraulic equilibrium principle, change the size of increasing back sealing ring, the axial force that can balance causes because of the high static pressure of tall building, axle envelope does not have and leaks, and this pump can also be high and even more make water cycle under the tall building as 120 meters at high-rise building at low floor, guarantees safe and reliable, be of value to the working life of motor and pump, thereby enlarged the using scope of product.3, this pump adopts vertical structure, and quiet motor is matched in the slow-speed of revolution simultaneously, uses the unit running noise to descend 5 decibels, reduces the pollution of noise to environment.

Accompanying drawing is heat, cold water circulation pump complete section structural representation.

Accompanying drawing has provided the structural representation of a kind of most preferred embodiment of the utility model, it is a vertical structure, pump is coaxial, motor 1 up, pump below, the pump housing 6 is positioned at orlop, which is provided with bonnet 2, the common pump chamber of forming, the major axis of motor 1 stretches in the pump chamber, the axle head that is positioned at pump chamber is equipped with impeller 7 and also is anchored on the axle head with impeller nut 9, support 5 places the pump housing 6, between bonnet 2 and the motor 1, supporting is fixing to be used to do, the pump housing 6 is made up of suction chamber and pumping chamber, suction chamber is positioned at before the impeller 7, be the bend pipe shape, be intake tunnel, pumping chamber is positioned at after the impeller 7, in the shape of a spiral shape, the liquid that collection is flowed out from impeller 7, and be transported to drain opening, and constitute the flow passage components of pump by the pump housing 6 and impeller 7, on the pump housing 6 and bonnet 2, be installed with seal ring 8, seal ring and increasing back sealing ring before being provided with in the blade wheel structure, be drilled with uniform equalizing orifice near the axial region position on its back shroud, the seal ring 8 of insert is formed sealing pair on the preceding seal ring of impeller 7 and the pump housing 6, stops the current of pump chamber high pressure water to return low pressure area.Change the increasing back sealing ring size of impeller 7, can change the axial force direction and the size of pump, i.e. hydraulic equilibrium.Like this, increasing back sealing ring and equalizing orifice constitute the axial force balance mechanism of this pump.Bonnet 2 insert stationary rings 3 are equipped with rotating ring 4 on the axle, and stationary ring 3 and rotating ring 4 have been formed the axial seal of pump, and it stops pump chamber internal pressure water external leakage vertically.

Claims (1)

1, a kind of heat, cold water circulation pump, comprise the pump coaxial that motor and below thereof are provided with it, the pump housing that is made of intake chamber and pumping chamber is provided with bonnet and constitutes pump chamber jointly, the shaft extension of motor is gone in the pump chamber, be positioned on the axle head of pump chamber and fixedly mount impeller, insert seal ring on the pump housing and the bonnet, axle in bonnet and the pump chamber is gone up insert stationary ring and rotating ring respectively, it is characterized in that: increasing back sealing ring also is set in the blade wheel structure, and the position near axle on its back shroud is drilled with uniform equalizing orifice.

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