CN216160842U - Low-frequency moving-coil type geophone - Google Patents
Low-frequency moving-coil type geophone Download PDFInfo
- Publication number
- CN216160842U CN216160842U CN202121274605.1U CN202121274605U CN216160842U CN 216160842 U CN216160842 U CN 216160842U CN 202121274605 U CN202121274605 U CN 202121274605U CN 216160842 U CN216160842 U CN 216160842U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- spring piece
- magnetic shoe
- coil
- pressed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model discloses a low-frequency moving-coil geophone.A magnetic steel component comprises three cylindrical magnetic steels with central holes, an upper magnetic shoe, a lower magnetic shoe, two middle magnetic shoes and a central shaft matched with each central hole, wherein the upper magnetic shoe, the lower magnetic shoe, the two middle magnetic shoes and the three magnetic steels are fixed together by the central shaft; four winding grooves with two winding grooves in the middle and wider than two winding grooves on two sides are separated on the coil rack, and four groups of coils with two groups of coils in the middle and wider than the coils on two sides and more turns are wound in the winding grooves; the lower end of the lower magnetic shoe is pressed on the two-stage bosses of the bottom cover and is pressed on the inner edge of the lower spring piece; the upper end of the upper magnetic shoe is pressed on the two-stage bosses of the top cover and is pressed on the inner edge of the upper spring piece; the inner boss at the upper end part of the coil rack is pressed on the outer edge of the upper spring piece, and the inner step at the lower end is arranged on the outer edge of the lower spring piece; the lower end of the lead spring is welded on a binding post of which the other end is welded with the leading-out terminals of the upper and lower coils. The utility model has the advantages of high transmission ratio, high sensitivity, high electromechanical conversion efficiency, small volume and light weight.
Description
Technical Field
The utility model relates to a low-frequency moving-coil geophone.
Background
The geophone for exploration industry, which tries various novel geophones such as optical fiber geophone, land piezoelectric geophone, MEMS digital geophone and other detectors with advanced technology in recent years, has inevitable and fatal defects, and is more practical and reliable through many-sided comparison, which shows that the moving coil geophone cannot be replaced in the exploration industry and still occupies the dominant position. In recent years, low-frequency single-point geophones have become the development direction of geophones due to high sensitivity, low natural frequency and convenient construction, at present, low-frequency single-point geophones SG-5Hz, SG-10Hz, SOLO-5, SOLO-10, SN5-5, SN5-10, GLMD-5, GLMD-10 and the like produced by a plurality of manufacturers mainly producing geophones all over the world, the technical indexes of the products are approximate, compared with the traditional 20D10Hz (the sensitivity is 20, and the direct current resistance is 283 omega), the sensitivity (80-100) of the low-frequency single-point geophone is improved by 4 times, however, the coil resistance is improved by 6 times, the transmission ratio is reduced on the contrary (the transmission ratio of the traditional 20D10Hz geophone is about 0.7, and the transmission ratio of the low-frequency single-point geophone is about 0.5-0.6), the electromechanical conversion efficiency is reduced, and the data acquisition is influenced in some regions.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art and provide a low-frequency moving-coil geophone which has the advantages of high transmission ratio, high sensitivity, high electromechanical conversion efficiency, small volume and light weight.
In order to solve the problems, the technical solution of the utility model is as follows: a low-frequency moving-coil type geophone comprises a cylindrical shell, a magnetic steel assembly arranged in the shell, three temperature compensation rings, a top cover and a bottom cover which are respectively arranged at two ports of the shell through sealing rings, a coil assembly, an upper spring leaf, a lower spring leaf and an insulator for outputting an electric signal; the magnetic steel component comprises three pieces of cylindrical magnetic steel with central holes, an upper magnetic shoe with a central hole, a lower magnetic shoe with a central hole, two middle magnetic shoes with a central hole and a central shaft matched with each central hole, the three pieces of magnetic steel are arranged in the upper and middle magnetic shoes, the middle and middle magnetic shoes and the middle and lower magnetic shoes in a magnetic alignment manner according to the same way of two opposite magnetic poles on the adjacent magnetic steel, and the upper and lower magnetic shoes, the two middle magnetic shoes and the three pieces of magnetic steel are fixed together by the central shaft; each temperature compensation ring is respectively connected between the upper and middle magnetic shoes, the middle and lower magnetic shoes, sleeved outside the magnetic steel and contacted with the excircle of the magnetic steel; the coil assembly is positioned in a gap between the magnetic steel assembly and the shell and comprises an integrated coil frame, four winding grooves are separated from the coil frame, the two winding grooves in the middle are wider than the two winding grooves on the two sides, four groups of coils are wound in the winding grooves, the two groups of coils in the middle are wider than the coils on the two sides, the number of turns is more, and the winding directions of the two adjacent groups of coils are opposite; the centers of the lower end of the upper magnetic shoe and the upper end of the lower magnetic shoe are respectively provided with a bulge and a central groove which are matched with the two-stage bosses of the top cover and the bottom cover; the lower end of the lower magnetic shoe is pressed on the two-stage boss of the bottom cover and is pressed on the inner edge of the lower spring piece sleeved on the uppermost boss of the bottom cover; the upper end of the upper magnetic shoe is pressed on the two-stage bosses of the top cover and is pressed on the inner edge of the upper spring piece sleeved on the boss at the lowest part of the top cover; the inner boss at the upper end part of the coil rack is pressed on the outer edge of the upper spring piece, and the inner step at the lower end of the coil rack is arranged on the outer edge of the lower spring piece; the deformation directions of the main ribs of the upper spring piece and the lower spring piece are both anticlockwise; the lower end of the lead spring is welded on a binding post which is clamped in a binding post hole of the coil rack in an insulating manner, and the other end of the binding post is welded and connected with leading-out terminals of the upper coil and the lower coil; the insulator is fixed on the upper end surface of the top cover in an insulating way; the top cover, the upper spring piece, the lower spring piece, the bottom cover and the magnetic steel component are positioned on the same central axis.
Further preferably, the upper end face of the coil rack is symmetrically provided with two positioning grooves, namely a deep positioning groove and a shallow positioning groove, and two positioning bulges protrude from the boss of the top cover; the two positioning bulges are inserted and fixed in the deep positioning groove and the shallow positioning groove; the inner circle and the outer circle of the upper spring plate are respectively provided with an inner positioning tongue and an outer positioning tongue, the outer positioning tongue is inserted and fixed in a deep positioning groove on the upper end surface of the coil frame, and the inner positioning tongue is inserted and fixed in a limiting groove formed on a lug boss of the top cover. The two positioning bulges of the top cover prevent the coil rack from rotating, thereby avoiding the lead-out terminal knobs of the upper coil and the lower coil from being damaged and disconnected and prolonging the service life of the lead-out terminal knobs; and the phenomenon that the work stops due to the fact that the coil rack is abraded and clamped with the outer wall of the magnetic steel component is avoided. The inner and outer positioning tongues of the upper spring piece avoid the upper spring piece from rotating and shifting.
Further preferably, the bobbin is formed in one step, made of the LY12 alloy aluminum material subjected to the low-temperature insulation oxidation treatment.
Further preferably, the thickness of the upper and lower spring pieces 15 and 10 is 0.076mm, which is in the shape of a conical bell.
Further preferably, the outer shell 14 and the upper, middle and lower magnetic shoes 3 and 13 are made of pure iron or low carbon steel.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: according to the electromagnetic induction principle, the magnetic steel component adopts a combined magnetic structure design, so that the radial magnetic field is enhanced, the magnetic leakage is reduced, the electromagnetic conversion efficiency is improved, the transmission ratio of the detector is increased, and the electromechanical conversion efficiency is high. The coil frame is a one-piece body, and is made of LY12 alloy aluminum material which is processed by low-temperature insulation and oxidation, and the coil frame is not scattered any more in frequent vibration, and the service life of the coil frame is prolonged. The magnetic shoe and the shell are made of pure iron or low-carbon steel materials, and have good magnetic conductivity. The upper magnetic shoe, the two middle magnetic shoes and the three pieces of magnetic steel are fixed together by the central shaft, the center of the magnetic steel component is accurately positioned, the radial displacement of the magnetic steel component is prevented, and the phenomenon that the outer wall of the magnetic shoe of the magnetic steel component is in contact with the inner wall of the coil rack to be abraded and clamped so that the geophone stops working is avoided. Because the two sides of the magnetic field of the magnetic steel component are strong and the middle is weak; the middle two winding slots are wider than the two winding slots on the two sides, so that the middle two groups of coils are wider than the coils on the two sides, the number of turns is more, the middle weak magnetic field of the magnetic steel component is compensated, the magnetoelectric conversion between the middle and the two sides is uniform, and the quality of the utility model is improved. The utility model has small volume and light weight, can be used independently or in combination like a low-frequency single-point geophone, has the single transmission ratio of more than 1 and has the sensitivity as high as 150V/m/s.
Drawings
Fig. 1 is a schematic view of the internal structure of the present invention.
Detailed Description
The utility model is further described below with reference to the figures and examples.
As shown in fig. 1, the present embodiment includes a cylindrical housing 14, a magnetic steel assembly disposed in the housing 14, a temperature compensation ring 12, a top cover 1 and a bottom cover 9 respectively mounted at two ports of the housing through a seal ring 8, a coil assembly, upper and lower spring strips 15, 10, and an insulator 18 for outputting an electrical signal. The magnetic steel assembly comprises three cylindrical magnetic steels 5 with central holes, upper and lower magnetic shoes 3 and 7 with central holes, two middle magnetic shoes 13 with central holes and a central shaft 4 matched with the central holes, the three magnetic steels 5 are arranged in the upper and middle, middle and lower magnetic shoes in a magnetic alignment mode in which two opposite magnetic poles on the adjacent magnetic steels are the same, and the upper and lower magnetic shoes 3 and 7, the two middle magnetic shoes 13 and the three magnetic steels 5 are fixed together by the central shaft 4. Each temperature compensation ring 12 is connected between the upper and middle magnetic shoes, the middle and middle magnetic shoes, and is sleeved outside the magnetic steel 5 and contacted with the excircle of the magnetic steel. The coil assembly is positioned in a gap between the magnetic steel assembly and the shell 14 and comprises a one-piece coil frame 6, four winding grooves are separated on the coil frame 6, the middle two winding grooves are wider than the two winding grooves on the two sides, four groups of coils 111, 112, 113 and 114 are wound in the winding grooves, the middle two groups of coils 112 and 113 are wider than the coils 111 and 114 on the two sides, the number of turns is more, and the winding directions of the two adjacent groups of coils are opposite. The centers of the lower end of the upper magnetic shoe 3 and the upper end of the lower magnetic shoe 7 are respectively provided with a bulge and a central groove which are matched with the two-stage bosses of the top cover 1 and the bottom cover 9. The lower end of the lower magnetic shoe 7 is pressed on the two-stage boss of the bottom cover 9 and is pressed on the inner edge of a lower spring piece 10 sleeved on the uppermost boss of the bottom cover 9; the upper end of the upper magnetic shoe 3 is pressed on the two-stage bosses of the top cover 1 and is pressed on the inner edge of an upper spring piece 15 sleeved on the lowest boss of the top cover 1. The upper end groove of the coil frame 6 is pressed on the outer edge of the upper spring piece 15, and the lower end step is arranged on the outer edge of the lower spring piece 10. The deformation directions of the main ribs of the upper spring piece 15 and the lower spring piece 10 are both anticlockwise. The lower end of the lead spring 2 is welded on a binding post 16 in a binding post hole of the coil rack 6 in an insulating clamping way, and the other end of the binding post 16 is welded and connected with leading-out terminals of the upper coil and the lower coil. The insulator 18 is fixed on the upper end surface of the top cover 1 in an insulated manner. The top cover 1, the upper spring leaf 15, the lower spring leaf 10, the bottom cover 9 and the magnetic steel component are positioned on the same central axis.
Preferably, the upper end surface of the coil frame 6 is symmetrically provided with two positioning grooves, namely a deep positioning groove and a shallow positioning groove, and two positioning protrusions protrude from a boss of the top cover 1; the two positioning bulges are inserted and fixed in the deep positioning groove and the shallow positioning groove. The inner circle and the outer circle of the upper spring piece 15 are respectively provided with an inner positioning tongue and an outer positioning tongue, the outer positioning tongue is inserted and fixed in a deep positioning groove on the upper end surface of the coil frame, and the inner positioning tongue is inserted and fixed in a limiting groove formed on a lug boss of the top cover.
Preferably, the bobbin is formed in one step, and is made of an LY12 alloy aluminum material which is subjected to a low-temperature insulation oxidation treatment.
Preferably, the thickness of the upper and lower spring pieces 15 and 10 is 0.076mm, which is in the shape of a conical bell.
Preferably, the outer shell 14 and the upper, middle and lower magnetic shoes 3 and 13 are made of pure iron or low carbon steel.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the utility model should fall within the protection scope of the utility model.
Claims (9)
1. A low-frequency moving-coil type geophone comprises a cylindrical shell, a magnetic steel assembly arranged in the shell, three temperature compensation rings, a top cover and a bottom cover which are respectively arranged at two ports of the shell through sealing rings, a coil assembly, an upper spring leaf, a lower spring leaf and an insulator for outputting an electric signal; the method is characterized in that: the magnetic steel component comprises three pieces of cylindrical magnetic steel with central holes, an upper magnetic shoe with a central hole, a lower magnetic shoe with a central hole, two middle magnetic shoes with a central hole and a central shaft matched with each central hole, the three pieces of magnetic steel are arranged in the upper and middle magnetic shoes, the middle and middle magnetic shoes and the middle and lower magnetic shoes in a magnetic alignment manner according to the same way of two opposite magnetic poles on the adjacent magnetic steel, and the upper and lower magnetic shoes, the two middle magnetic shoes and the three pieces of magnetic steel are fixed together by the central shaft; each temperature compensation ring is respectively connected between the upper and middle magnetic shoes, the middle and lower magnetic shoes, sleeved outside the magnetic steel and contacted with the excircle of the magnetic steel; the coil assembly is positioned in a gap between the magnetic steel assembly and the shell and comprises an integrated coil frame, four winding grooves are separated from the coil frame, the two winding grooves in the middle are wider than the two winding grooves on the two sides, four groups of coils are wound in the winding grooves, the two groups of coils in the middle are wider than the coils on the two sides, the number of turns is more, and the winding directions of the two adjacent groups of coils are opposite; the centers of the lower end of the upper magnetic shoe and the upper end of the lower magnetic shoe are respectively provided with a bulge and a central groove which are matched with the two-stage bosses of the top cover and the bottom cover; the lower end of the lower magnetic shoe is pressed on the two-stage boss of the bottom cover and is pressed on the inner edge of the lower spring piece sleeved on the uppermost boss of the bottom cover; the upper end of the upper magnetic shoe is pressed on the two-stage bosses of the top cover and is pressed on the inner edge of the upper spring piece sleeved on the boss at the lowest part of the top cover; the inner boss at the upper end part of the coil rack is pressed on the outer edge of the upper spring piece, and the inner step at the lower end of the coil rack is arranged on the outer edge of the lower spring piece; the deformation directions of the main ribs of the upper spring piece and the lower spring piece are both anticlockwise; the lower end of the lead spring is welded on a binding post which is clamped in a binding post hole of the coil rack in an insulating manner, and the other end of the binding post is welded and connected with leading-out terminals of the upper coil and the lower coil; the insulator is fixed on the upper end surface of the top cover in an insulating way; the top cover, the upper spring piece, the lower spring piece, the bottom cover and the magnetic steel component are positioned on the same central axis.
2. A low frequency moving coil geophone in accordance with claim 1, wherein: the upper end face of the coil rack is symmetrically provided with a deep positioning groove and a shallow positioning groove, and two positioning bulges protrude from the boss of the top cover; the two positioning bulges are inserted and fixed in the deep positioning groove and the shallow positioning groove; the inner circle and the outer circle of the upper spring plate are respectively provided with an inner positioning tongue and an outer positioning tongue, the outer positioning tongue is inserted and fixed in a deep positioning groove on the upper end surface of the coil frame, and the inner positioning tongue is inserted and fixed in a limiting groove formed on a lug boss of the top cover.
3. A low frequency moving coil geophone in accordance with claim 1 or 2, wherein: the coil frame is formed in one step and is made of LY12 alloy aluminum material which is subjected to low-temperature insulation oxidation treatment.
4. A low frequency moving coil geophone in accordance with claim 3, wherein: the thickness of the upper spring piece and the lower spring piece is 0.076mm, and the upper spring piece and the lower spring piece are in a conical bell mouth shape.
5. A low frequency moving coil geophone in accordance with claim 4, wherein: the shell, the upper magnetic shoe, the middle magnetic shoe and the lower magnetic shoe are all made of pure iron or low-carbon steel.
6. A low frequency moving coil geophone in accordance with claim 1 or 2, wherein: the thickness of the upper spring piece and the lower spring piece is 0.076mm, and the upper spring piece and the lower spring piece are in a conical bell mouth shape.
7. The low frequency moving coil geophone in accordance with claim 6, wherein: the shell, the upper magnetic shoe, the middle magnetic shoe and the lower magnetic shoe are all made of pure iron or low-carbon steel.
8. A low frequency moving coil geophone in accordance with claim 3, wherein: the shell, the upper magnetic shoe, the middle magnetic shoe and the lower magnetic shoe are all made of pure iron or low-carbon steel.
9. A low frequency moving coil geophone in accordance with claim 1 or 2, wherein: the shell, the upper magnetic shoe, the middle magnetic shoe and the lower magnetic shoe are all made of pure iron or low-carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121274605.1U CN216160842U (en) | 2021-06-08 | 2021-06-08 | Low-frequency moving-coil type geophone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121274605.1U CN216160842U (en) | 2021-06-08 | 2021-06-08 | Low-frequency moving-coil type geophone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216160842U true CN216160842U (en) | 2022-04-01 |
Family
ID=80835411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121274605.1U Active CN216160842U (en) | 2021-06-08 | 2021-06-08 | Low-frequency moving-coil type geophone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216160842U (en) |
-
2021
- 2021-06-08 CN CN202121274605.1U patent/CN216160842U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5945748A (en) | Linear motor structure for linear compressor | |
| TWI389149B (en) | Symmetrical leakage inductance adjustable flat transformer | |
| US4285054A (en) | Geophone | |
| CN111371193B (en) | Wireless power transmission collector ring and electrical equipment | |
| CN109639003A (en) | Rotor, disc type electric machine and the vehicle of disc type electric machine | |
| CN216160842U (en) | Low-frequency moving-coil type geophone | |
| KR102547570B1 (en) | Motor | |
| US4608463A (en) | Electro-acoustic transducer | |
| CN216848171U (en) | Seismic detector | |
| WO2022142318A1 (en) | Magnetic suspension bearing stator assembly and magnetic suspension motor having same | |
| CN110632648A (en) | Low-frequency detector | |
| CN210692310U (en) | Large-current energy storage inductor | |
| US3078429A (en) | Current-limiting reactors for fluorescent tubes or the like | |
| CN113640865A (en) | Miniaturized movable coil core structure of high sensitivity | |
| CN208953701U (en) | A kind of novel moving coil formula high sensitivity geophone | |
| US8077902B2 (en) | Planar flexible voice coil suspension | |
| CN213302524U (en) | Low-frequency detector with high precision and high stability | |
| CN215067338U (en) | Novel miniaturized movable coil core | |
| KR20210016753A (en) | Ungrounded Motor | |
| CN218300166U (en) | Battery and electronic equipment | |
| CN219227294U (en) | Integral stator structure of sectional winding type concentrated winding | |
| CN212341473U (en) | Core body of radial magnetic circuit moving coil detector | |
| CN215067339U (en) | Core of moving coil detector with combined structure | |
| CN219046541U (en) | Bone conduction vibrator | |
| US2801294A (en) | Electrodynamic receiving apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |