CN201982335U - Low-noise and high-pressure centrifugal fan - Google Patents

Abstract

The utility model discloses a low-noise and high-pressure centrifugal fan. The centrifugal fan comprises a base, a pedestal, a scroll casing, a motor and a bearing box, wherein the motor and the bearing box are fixed on the pedestal; the motor, the bearing box and the pedestal are fixed on the base together; the base with a damping function can reduce the shake noise when the motor and the fan operate; the scroll casing is fixed on the base; an air inlet and an air outlet are arranged on the scroll casing; an impeller is arranged in the scroll casing and mounted on a main shaft; a current collector is mounted at the air inlet of the scroll casing to reduce the impact noise of air on the inner surface of the casing, so that the function of noise reduction is achieved; and the motor is connected with the bearing box through a coupling, and the bearing box is connected with the main shaft, so that the transmission of the motor is conveyed to the main shaft to drive the impeller to rotate for air generation. The noise generated in operation is minimized on the premise of the normal operation of the high-pressure centrifugal fan.

Description

A kind of low noise centrifugal high pressure fan

Technical field:

The utility model relates to a kind of Fan Equipment, particularly a kind of low noise centrifugal high pressure fan.

Background technique:

Domestic high pressure positive blower generally has the blast height, the performance characteristics that flow is high relatively at present.Existing centrifugal high pressure fan, there is bigger space so just to reduce the sealability of centrifugal high pressure fan impeller front end office between the air intake cover plate on impeller shroud and the casing, making blower fan reveal at the air quantity in above-mentioned space strengthens, the air whirl that has increased impeller front end office forms, increase the impact noise of the relative casing inner surface of air, also can make the decrease in efficiency of blower fan.In addition, the noise of high pressure blower fan is bigger, adopts Sound Attenuator to solve noise, can cause volume excessive, and cost is also high.

The model utility content:

The utility model is at the deficiency of prior art, and a kind of low noise centrifugal high pressure fan is provided, and this blower fan has total pressure efficiency height, advantage that noise is low.

In order to achieve the above object, the utility model adopts following technological scheme: a kind of low noise centrifugal high pressure fan, form by base, pedestal, spiral case, motor and bearing housing, spiral case is fixed on the base, and intake grill and exhaust outlet are arranged on the spiral case, and impeller is arranged in the spiral case, impeller is installed on the main shaft, motor and bearing housing are fixed on the pedestal, are fixed on the base together with pedestal, and slip ring is installed on the intake grill place of spiral case; Motor is connected with bearing housing by coupling, and bearing housing is connected with main shaft.

The beneficial effects of the utility model are: the vibration noise that the cushioning effect by base produces when reducing blower fan and machine operation, reduce the formation of impeller front end intake grill place air whirl by slip ring, and reduce the impact noise of the relative casing inner surface of air.Therefore, the utility model can be when guaranteeing the centrifugal high pressure fan proper functioning, and the noise that work is produced drops to minimum.

Description of drawings:

Fig. 1 is the plan view of structural representation of the present utility model;

Fig. 2 is the side view of the utility model structural representation.

Among the figure: 1, base, 2, pedestal, 3, spiral case, 4, exhaust outlet, 5, motor, 6, intake grill, 7, main shaft, 8, slip ring, 9, impeller, 10, bearing housing, 11, coupling.

Embodiment:

Embodiment: see illustrated in figures 1 and 2, a kind of low noise centrifugal high pressure fan, form by base 1, pedestal 2, spiral case 3, motor 5 and bearing housing 10, motor 5 and bearing housing 10 are fixed on the pedestal 2, be fixed on the base 1 together with pedestal 2, base 1 has shock-absorbing function, the vibrations noise in the time of reducing the work of motor and blower fan; Spiral case 3 is fixed on the base 1, intake grill 6 and exhaust outlet 4 are arranged on the spiral case 1, impeller 9 is arranged in the spiral case 1, impeller 9 is installed on the main shaft 7, slip ring 8 is installed on intake grill 6 places, the air whirl that has reduced impeller front end office forms, and has reduced the impact noise of the relative casing inner surface of air, plays the function that reduces noise; Motor 5 is connected with bearing housing 10 by coupling 11, and bearing housing 10 is connected with main shaft 7, and the transmission of motor 5 is sent to main shaft 7, thus impeller 9 rotations, the generation air quantity.

Claims (2)

1. low noise centrifugal high pressure fan, form by base (1), pedestal (2), spiral case (3), motor (5) and bearing housing (10), spiral case (3) is fixed on the base (1), intake grill (6) and exhaust outlet (4) are arranged on the spiral case (1), impeller (9) is arranged in the spiral case (1), impeller (9) is installed on the main shaft (7), it is characterized in that: motor (5) and bearing housing (10) are fixed on the pedestal (2), be fixed on the base (1) together with pedestal (2), slip ring (8) is installed on intake grill (6) and locates.

2. a kind of low noise centrifugal high pressure fan as claimed in claim 1 is characterized in that: motor (5) is connected with bearing housing (10) by coupling (11), and bearing housing (10) is connected with main shaft (7).

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