CN2471416Y - High speed micro-centrifuger with negative pressure reduction of resistance - Google Patents

Abstract

The utility model provides a high-speed miniature centrifuge with drag reduction by negative pressure, which mainly comprises a centrifuge head in the rotor cavity and a motor in the motor cavity under the rotor cavity. The utility model is characterized in that two or more uniformly distributed negative pressure pumplines connected with the negative pressure aspirator pump are separately arranged in the rotor cavity and the motor cavity. Due to the action of the negative pressure pumpline, the centrifuge still enables high rotation speed and the centrifugal acceleration under the condition with the restricted volume and weight.

Description

Negative pressure drag-reducing high-speed micro centrifuge

The utility model relates to a kind of high speed micro centrifuge, belongs to utilize that centrifugation technique separates, the instrument of extraction of substance.The utility model is called the name of application on April 25th, 2000 No. 00208816.9 Chinese patent application of " two-chamber negative pressure drag reduction speed-raising centrifuge miniaturization scheme " as in first to file, and it has been proposed priority claim.

In the laboratory work of life science and other related disciplines, adopt centrifugation technique to various samples extract, separation, purifying become conventional means.Present centrifugation apparatus generally is divided into two classes, and a class is a supercentrifuge, and the power of this class centrifuge is big, rotating speed is high, and volume, weight are all bigger, take bigger lab space, and is not easy to carry, and can't satisfy the on-the-spot requirement of using; Another kind of then is micro centrifuge, though this class centrifuge volume is little, in light weight, is easy to carry, and has the little problem of centrifugal acceleration, usually is difficult to reach the purpose of effective sample separation.

For this reason, the purpose of this utility model is to overcome the deficiency of prior art, and provide a kind of volume little, in light weight, be easy to carry and the high high speed micro centrifuge of centrifugal acceleration.

The technical scheme that realizes the utility model purpose is a kind of negative pressure drag-reducing high-speed micro centrifuge, comprise centrifuge-head and the motor that is positioned at the centrifuge-head below, the rotor of motor and centrifuge-head are installed on the same axis, this axle is installed on the casing by bearing, the outer space of motor and rotary head is wrapped up by casing, form rotary head chamber and motor cavity, have sample turnover window on the casing of centrifuge-head top, window is outside equipped with seal cover, its special character is that the rotary head chamber is provided with equally distributed rotary head chamber negative pressure ventilation pipeline more than two or two, and each pipeline links to each other with the negative pressure ventilation pump respectively.

Technique scheme further is improved to, and motor cavity also is provided with equally distributed motor cavity negative pressure ventilation pipeline more than two or two, and each pipeline links to each other with the negative pressure ventilation pump respectively.

And motor is selected variable-frequency motor for use, the bearing place is installed is provided with oil sealing.

As shown from the above technical solution, the micro centrifuge that the utility model provides is provided with the negative pressure ventilation pipeline that links to each other with the negative pressure ventilation pump respectively at its rotary head chamber, motor cavity, by the negative pressure ventilation pump constantly with the gas in rotary head chamber, the motor cavity outside negative pressure ventilation pipeline discharge side, make the atmospheric density in rotary head chamber, the motor cavity be in very low state all the time, so just reduce the vapour lock that system produces to a great extent when running up, thereby can under volume, the restricted condition of weight, obtain high rotating speed and centrifugal acceleration.

Below with reference to accompanying drawing the utility model is elaborated.

Fig. 1 is a whole generalized section of the present utility model.

Fig. 2 is A-A generalized section of Fig. 1.

By Fig. 1, shown in Figure 2, the negative pressure drag-reducing high-speed centrifuge that the utility model provides mainly is made of centrifuge-head 2 and the 16 liang of parts of motor that are positioned at centrifuge-head 2 belows, have sample turnover window 12 on the casing 4 of centrifuge-head 2 tops, window 12 is outside equipped with seal cover 1, and motor 16 is generally selected variable-frequency motor for use; The rotor 9 and the centrifuge-head 2 of motor 16 are installed on the same axis 11, axle 11 is by bearing 3,6 are installed on the casing 4, for the needs that seal, bearing 3 is installed, 6 places should be provided with oil sealing, the stator 5 of motor 16 is positioned at rotor 9 peripheries, motor 16 is wrapped up by casing 4 with the space outside the rotary head 2, form rotary head chamber 15 and motor cavity 7, be provided with equally distributed rotary head chamber negative pressure ventilation pipeline 10 more than two or two in the rotary head chamber 15, each pipeline 10 links to each other with negative pressure ventilation pump 8 respectively, generally speaking, negative pressure ventilation pipeline 10 in the rotary head chamber 15 preferably is located at the peripheral bottom in rotary head chamber 15, to save the space, it shown in Fig. 1 the situation that two pump-lines are set, motor cavity 7 equally also can be provided with equally distributed motor cavity negative pressure ventilation pipeline 13 more than two or two, each pipeline 13 links to each other with negative pressure ventilation pump 14 respectively, the inwall of rotary head chamber 15 and motor cavity 7 should be smooth, smooth, the smooth surface blending in junction, interface, resistance when reducing steering current, rotary head chamber negative pressure ventilation pipeline 10, it is foundation that tangential direction should be rotated with air-flow in the road junction of motor cavity negative pressure ventilation pipeline 13, being skewed is curved surface in face of airflow direction and cavity and is connected, the curved again below that turns to links to each other with the negative pressure ventilation pump.

The automatically controlled part that matches with frame for movement in the utility model can be provided with motor with power supply, negative pressure ventilation pump with power supply and sensor measurement with these three kinds of power supply modes of power supply, for implementing closed-loop control, increasing job stability, can in the rotary head chamber, select to be provided with two kinds in speed probe, B/P EGR Back Pressure Transducer EGR, eddy current or the windage sensor.

Claims (4)

1, a kind of negative pressure drag-reducing high-speed micro centrifuge, comprise centrifuge-head [2] and be positioned at the motor [16] of centrifuge-head [2] below, the rotor [9] of motor [16] is installed on same axis [11] with centrifuge-head [2], this axle [11] is by bearing [3,6] be installed on the casing [4], motor [16] is wrapped up by casing [4] with the space outside the rotary head [2], form rotary head chamber [15] and motor cavity [7], have sample turnover window [12] on the casing [4] of centrifuge-head [2] top, window [12] is outside equipped with seal cover [1], it is characterized in that: rotary head chamber [15] are provided with equally distributed rotary head chamber negative pressure ventilation pipeline [10] more than two or two, and each pipeline [10] links to each other with negative pressure ventilation pump [8] respectively.

2, micro centrifuge according to claim 1 is characterized in that: motor cavity [7] is provided with equally distributed motor cavity negative pressure ventilation pipeline [13] more than two or two, and each pipeline [13] links to each other with negative pressure ventilation pump [14] respectively.

3, micro centrifuge according to claim 1 and 2 is characterized in that: bearing [3,6] is installed is located to be provided with oil sealing.

4, require 1 or 2 described micro centrifuges according to the comb profit, it is characterized in that: motor [16] is a variable-frequency motor.

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