CN2203722Y - Frequency-modulation induction liquid metal electromagnetic pump - Google Patents
Frequency-modulation induction liquid metal electromagnetic pump Download PDFInfo
- Publication number
- CN2203722Y CN2203722Y CN 94219864 CN94219864U CN2203722Y CN 2203722 Y CN2203722 Y CN 2203722Y CN 94219864 CN94219864 CN 94219864 CN 94219864 U CN94219864 U CN 94219864U CN 2203722 Y CN2203722 Y CN 2203722Y
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- liquid metal
- pump
- electromagnetic pump
- frequency
- iron core
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Abstract
The utility model discloses a frequency-modulation induction liquid metal electromagnetic pump, belonging to the technical field of an electromechanical device for pumping liquid metal solder in the automatic welding equipment of a printed circuit board. The frequency-modulation induction liquid metal electromagnetic pump is composed of the primary stator core of a single-side linear electric motor and a winding thereof, a T-shaped liquid metal container, channels and a pump nozzle. The longitudinal part of the metal container is inlaid into an iron core, and the transversal part of the metal container is tightly clung to the iron core. The metal container is provided with two longitudinal channels whose both ends are respectively communicated with the bottom of the pump nozzle and the container. The frequency-modulation induction liquid metal electromagnetic pump utilizes a three-phase frequency-modulation power supply. An adjustable wave of 30 millimeters can be generated, and the welding temperature is 200-260 DEG C The frequency-modulation induction liquid metal electromagnetic pump has the advantages of noiselessness, high efficiency, stabilization, reliable, and the automation control is easy to be realized. The frequency-modulation induction liquid metal electromagnetic pump can be served as the electromagnetic pump of the automatic welding equipment of the printed circuit board.
Description
Frequency modulation induction type liquid metal electromagnetic pump belongs to the electromechanical assembly technical field of pumping liquid metal solder in the automatic welding device of printed circuit board.
In electronic parts and components assembling welding, because the integrated and miniaturization of electronic parts and components, the packing density of circuit board is more and more higher, spacing is more and more littler, traditional manual welding far can not adapt to, thereby produced wave soldering technology, but with single crest and dual waves mechanical pump soldering surface mounted element, its poor reliability.Thereby the dual waves electromagnetic pump is exactly an one of device of implementing necessity of this manufacturing process.Present domestic this class electromagnetic pump of having developed, as " a kind of novel liquid metal soft brazing electromagnetic pump " (application number: 90216207.1, notification number CN2077921U), this pump belongs to the single-phase induction pump, compare with other pump, have no mechanical noise, electrodeless, do not have wearing and tearing, crest steadily and welding quality advantage preferably.But, also have some defectives.Due to owing to the electromagnetic coupling state, efficient has only 25%, the low and difficult adjusting of crest height.
The objective of the invention is further to improve the work efficiency of electromagnetic pump, even the thrust volume ratio of induction pump, thrust mass ratio and thrust-power ratio under the condition of equal price performance, are accomplished under the volume, and be in light weight few with materials; Can adjust control automatically in real time to the crest height realization of welding, with the reliability of raising welding procedure by variable frequency power source and computer system.
The technological scheme of claimed model utility is as follows:
Frequency modulation induction type liquid metal electromagnetic pump is chewed by the elementary stator iron core of unilateral linear electric motor and winding, liquid metal vessels, raceway groove and pump and is formed.Liquid metal vessels is the T-shape structure, is provided with the longitudinal channel of two symmetric types in the longitudinal component of T-shape, and the cross section of raceway groove is rectangular, and an end of raceway groove is chewed with pump and is connected, and the other end is connected with liquid metal vessels.The longitudinal component of liquid metal vessels is embedded in the stator iron core of monolateral road formula linear electric motor that are wound with winding, and the lateral part places on the iron core, pastes mutually with the last plane of iron core.Electromagnetic pump is provided with two pumps and chews, and they link to each other with the longitudinal channel of two symmetric types respectively.The winding of the elementary stator iron core of unilateral linear electric motor can be two-phase or three-phase.The structure of raceway groove can be single raceway groove arranged perpendicular; Also can single ditch level dispose, have a pump to chew and link to each other with raceway groove.
Below in conjunction with embodiment and contrast accompanying drawing and technological scheme is remake further describe.
Fig. 1 be frequency modulation induction type liquid metal electromagnetic pump face the direction structure schematic representation.Fig. 2 is its top view direction structure schematic representation.Fig. 3 is the sectional view of A-A direction among Fig. 1.Fig. 4 is the sectional view of B-B direction among Fig. 1.In above each view, 1---the threephase stator iron core, it is long that it is of a size of 218() * 150(is wide) * the 70(height) cubic millimeter.2---the threephase stator winding, put in order apart from winding for three-phase the two poles of the earth are double-deck.3---raceway groove, be provided with two raceway grooves with parallel longitudinal, they are equivalent to the secondary of linear electric motor, be arranged in vertical position of T-shape structure liquid metal vessels, one end of raceway groove is chewed with pump and is connected, and the other end is connected with liquid metal vessels, and the cross section of raceway groove is rectangular, raceway groove is of a size of: 240(is long) * 250(is wide) * the 10(height) cubic millimeter, be two chromium 13 with Martensitic Stain Less Steel 2Cr13() make.4---liquid metal holds, be the T-shape structure, be provided with the longitudinal channel of two symmetries in its longitudinal component, laterally being provided with two pumps in the top chews, vertical left and right sides of container is embedded in the stator iron core of the double-deck whole unilateral linear electric motor apart from winding in three-phase the two poles of the earth, the lateral part places on the iron core, pastes mutually with the last plane of iron core.Can hold 130 kilograms in scolder, constitute by 1Cr18.5---liquid metal, can be plumber's solder, place among the liquid metal vessels.6---two-way wide plane wave pump is chewed, and sprays two-way asymmetric wide plane wave, makes with stainless steel, and the cross-sectional dimension that its pump is chewed outlet is 250 * 30 square millimeters.7---hollow ripple (turbulent ripple) pump is chewed, and sprays turbulent ripple, and it is 250 * 2.5 square millimeters that pump is chewed the outlet cross section.8---plate washer, prevent the scolder ejection out-of-bounds, make by stainless steel.
The working procedure of frequency modulation induction type liquid metal electromagnetic pump is as follows: when passing to three symmetrical Ac for threephase stator iron core winding (2), near the space stator core (1) then, particularly the space in the raceway groove (3) produces the three-phase travelling-magnetic-field, and with synchronous speed Vs=2
In the f(formula
Be pole span, f is a power supply frequency) liquid metal solder (5) in cutting raceway groove (3), the quite electric many concentric rectangles coils of raceway groove scolder, it induces the palisade electric current under the cutting of travelling-magnetic-field, this electric current and travelling-magnetic-field interact, produce electromagnetic push, its direction is determined by the motor left hand rule.Thereby make the plumber's solder in the liquid metal vessels (4) enter from the bottom of raceway groove (3), motion from the bottom to top in raceway groove (3), promptly form normal thrust, with the ejection from pump is chewed of direct promotion liquid metal liquid, the crest that forms certain lift is used for welding.Because this device adopts three phase mains, current load to be evenly distributed in substantially in the effective air gap plane, iron core surface, owing to being close between raceway groove and coil, iron core, therefore, implement close-coupled between primary and secondary, magnetic circuit is very short, and therefore, efficient and utilization ratio are higher.
The important technological parameters of the frequency modulation induction type liquid metal electromagnetic pump of this model is as follows:
Boundary dimension (comprising heating equipment): 350(is long) * 400(is wide) * the 420(height) cubic millimeter
Complete machine net weight: 150 kilograms
Crest number: dual waves
Crest height: 30 millimeters
Welding temperature: 200～260 ℃
Power supply: 2 * 0.75 kilowatts, three-phase, frequency modulation
The utility model is compared with background technique has following useful effect:
1, there are not mechanical noise, electrodeless, nothing wearing and tearing;
2, volume is little, and materials are few, and is in light weight, and the thrust volume ratio is big;
3, work efficiency height, the thrust input power is than high;
4, the scolder capacity is little, and thrust mass ratio is big;
5, with variable frequency power source, the supporting use of height detection sensor, can carry out closed loop to crest height and control in real time;
6, automaticity and reliability height.
Claims (3)
1, a kind ofly chew the frequency modulation induction type liquid metal electromagnetic pump of forming, it is characterized in that by the elementary stator iron core of unilateral linear electric motor and winding thereof, liquid metal vessels, pump:
(1) liquid metal vessels is the T-shape structure, and vertical position of T-shape is provided with two symmetrical longitudinal channels, and the cross section of raceway groove is rectangular, and an end of raceway groove is chewed with pump and is connected, and the other end is connected with liquid metal vessels,
(2) the horizontal position of liquid metal vessels is provided with two pumps and chews,
(3) longitudinal component of liquid metal vessels is embedded in the stator iron core of unilateral linear electric motor that are wound with winding, and the lateral part places on the iron core, pastes mutually with the last plane of iron core.
2, frequency modulation induction type liquid metal electromagnetic pump according to claim 1 is characterized in that double channel is the vertical symmetry configuration, and two pumps are chewed respectively and linked to each other with raceway groove, or single raceway groove arranged perpendicular, a pump is chewed with raceway groove and is linked to each other, or the configuration of single ditch level, and a pump is chewed with raceway groove and linked to each other.
3, frequency modulation induction type liquid metal pump according to claim 1 and 2, the winding that it is characterized in that elementary stator iron core can be two-phase or three-phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94219864 CN2203722Y (en) | 1994-08-18 | 1994-08-18 | Frequency-modulation induction liquid metal electromagnetic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94219864 CN2203722Y (en) | 1994-08-18 | 1994-08-18 | Frequency-modulation induction liquid metal electromagnetic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2203722Y true CN2203722Y (en) | 1995-07-19 |
Family
ID=33834603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94219864 Expired - Fee Related CN2203722Y (en) | 1994-08-18 | 1994-08-18 | Frequency-modulation induction liquid metal electromagnetic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2203722Y (en) |
-
1994
- 1994-08-18 CN CN 94219864 patent/CN2203722Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |