CN201478959U - Multisection servo submersible motor - Google Patents

Abstract

A multisection servo submersible motor substantially comprises a motor body, wherein a motor shell on the head portion of the motor body is connected with a head flange; the head portion of a motor shaft protrudes out of the head flange; the motor shaft is fixed inside the head flange and connected with other devices through the head flange; the motor body contains a plurality of motor sections; a motor casing of each of the motor sections mainly includes a stator and a rotor; the rotor is a permanent magnet and a winding is arranged in an iron core of the stator; rotor shafts of two adjacent motor sections are mutually connected through a coupler; motor casings of two adjacent motor sections are mutually connected through a connecting device; N poles of motor the rotors disposed on two adjacent motor sections are correspondingly arranged in the same straight line while S poles are also are correspondingly arranged in the same straight line; and windings U, V and W of the motor stators are correspondingly arranged in the same straight line. The multisection servo submersible motor is simple in installation structure, easy to operate and capable of providing higher power.

Description

Multi-section servo submersible motor

Technical field

The utility model relates to a kind of servomotor, relates in particular to a kind of multi-section servo submersible motor that improves electric machine structure.

Background technology

Present China and other oil producing country of the world, all being extensive use of submersible electric machine with oil on the oil field drives submersible electric pump and draws crude oil, traditional submersible electric pump system, its power source mainly is two pole three phase asynchronous motors, there are three problems in existing oil extraction system in oil production technology is supporting:

The one, be lower than synchronous speed because of motor speed with centrifugal oil-immersed pump when supporting, electric efficiency and power factor are on the low side;

The 2nd, when going up with submersible screw pump is supporting, the too high very difficult process rotating speed device of rotating speed is reduced to speed the rotating speed that adapts with screw pump, even adopt decelerator also to improve cost for oil production and the efficient that has reduced system greatly, if adopt RHVC, make motor be in the temperature rise quickening that the low frequency operation state causes motor again easily for a long time, cause electrical fault.System can not realize flexible control, and efficient is low.

The 3rd, though traditional submersible electric pump system adopt variable frequency control, its motor controlling cabinet often place its alternating current of ground when transferring to motor owing to be long-distance transmissions, energy loss is serious, has further reduced the efficient of system.

Along with the development of new technology, the maturation gradually of servo techniques, servo latent oily oil pumping system becomes a kind of development trend of the oily oil pumping system of diving.Publication number is that the document of CN228745Y has proposed a kind of rare earth permanent magnet submersible electric motor, but it must be by embed the problem that permanent magnet improves synchronous speed on rotor on the basis of original asynchronous submersible electric machine with oil, the limit is in motor body, do not solve rotating speed adjustable, application in the low speed occasion is still very difficult, and efficient neither be very high.Publication number is that the document of CN2627715Y also discloses the synchronous submersible electric machine with oil of a kind of rare earth permanent magnet, and deficiency still is energy-conservation at it, and the shortage on the adjustable-speed.Though still have the low problem of fractional energy savings in conjunction with the frequency-variable controller use.

Give the defective that above-mentioned submersible electric machine with oil of the prior art exists, be necessary to provide a kind of efficient higher, more powerful, the multi-section servo submersible motor of saving cost more is to satisfy industrial needs.

The utility model content

The technical problems to be solved in the utility model is, at the deficiencies in the prior art, provides a kind of multi-section servo submersible motor, mounting structure is simple, easy operating can provide bigger power, preferably resolves the application problem in oily servo system is dived in the down-hole.

The technical problem that the utility model solved is achieved by the following technical solution:

A kind of multi-section servo submersible motor, mainly comprise motor body, the motor casing of motor body head links to each other with head flanges, the head of motor shaft convexedly stretches in outside the head flanges, and motor shaft is fixed in the head flanges and links to each other with other devices by described head flanges, includes the more piece motor in the described motor body, mainly comprise stator and rotor in the motor casing of every joint motor, rotor is a permanent magnet, is provided with winding in the stator core, and the armature spindle of two adjacent joint motors connects by shaft coupling; The motor casing of two adjacent joint motors connects by jockey; The N of the rotor that is provided with on the adjacent two joint motors extremely correspondence point-blank, extremely correspondence is point-blank for S; The U of motor stator, V, W three phase windings difference correspondence are point-blank.

For motor is supported, also be provided with alignment bearing between the adjacent two joint motors of described multi-section servo motor.

According to different needs, described jockey is screwed flange or flange or two screwed flange.

The afterbody of described motor shaft links to each other with encoder by sealing device.

Described encoder can adopt multiple structure and specification, such as: can be resolver or Mageneto-sensitive type resistor coding device or position-detection sensor.

Described position-detection sensor mainly comprises sensor body, stainless steel cage, sealing device and shell, and sensor body comprises magnetic steel ring, magnetic guiding loop and magnetic induction part; Magnetic guiding loop is arranged on the outer wall of stainless steel cage, is made of the segmental arc of two sections or the same radius of multistage, concentric, and adjacent two segmental arcs leave the slit; Magnetic induction part places in this slit; Magnetic steel ring is arranged in the inner chamber of stainless steel cage, is fixed on the machine shaft; Stainless steel cage outside is by sealing device and body seal and fixing; When magnetic steel ring and magnetic guiding loop generation relative rotary motion, described magnetic induction part is converted to voltage signal with the magnetic signal that senses, and this voltage signal is transferred to the corresponding signal process device.

Described magnetic guiding loop is made of the segmental arc of two sections same radiuses, concentric, is respectively 1/4 segmental arc and 3/4 segmental arc, and corresponding magnetic induction part is 2; Perhaps, described magnetic guiding loop is made of three sections segmental arcs with radius, is respectively 1/3 segmental arc, and corresponding magnetic induction part is 3; Perhaps, described magnetic guiding loop is made of four sections segmental arcs with radius, is respectively 1/4 segmental arc, and corresponding magnetic induction part is 4; Perhaps, described magnetic guiding loop is made of six sections segmental arcs with radius, is respectively 1/6 segmental arc, and corresponding magnetic induction part is 6.

The segmental arc end of described magnetic guiding loop is provided with chamfering; Described chamfering for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.

Described position-detection sensor also comprises skeleton, is used for fixing described magnetic guiding loop; Described magnetic guiding loop is arranged on the skeleton forming mould, when described skeleton is one-body molded and skeletal fixation together.

Described magnetic induction part is the hall sensing element.

A kind of signal processing apparatus of above-mentioned position-detection sensor comprises:

The A/D modular converter, the voltage signal that magnetic induction part in the position-detection sensor is sent carries out the A/D conversion, is digital signal with analog signal conversion;

Synthesis module, a plurality of voltage signals that the process A/D that position-detection sensor is sent changes are handled and are obtained reference signal D;

The angle acquisition module according to this reference signal D, selects the angle relative with it as deviation angle θ in the standard angle kilsyth basalt; And

Memory module is used for storage standards angle table and revises tables of data.

Between A/D modular converter and synthesis module, also comprise temperature compensation module, be used to eliminate the influence of the voltage signal that temperature sends position-detection sensor; The output signal of described synthesis module also comprises signal R; Described temperature compensation module comprises coefficient rectification module and multiplier, and described coefficient rectification module is to the signal R of the output of described synthesis module with to the signal R under should the standard state of signal ₀Compare and obtain output signal K; Described multiplier is a plurality of, and the voltage signal that each described multiplier will send from position-detection sensor, that process A/D changes and the output signal K of described coefficient rectification module multiply each other, and the result after will multiplying each other exports to synthesis module.

If the voltage signal that position-detection sensor sends is 2 or 3 multiple, then before described temperature compensation module, also comprise difference block, to being used to suppress temperature and null offset, and improve data precision.

Described position-detection sensor mainly comprises sensor body, stainless steel cage, sealing device and shell,

Sensor body comprises rotor, and described rotor comprises first magnetic steel ring, second magnetic steel ring,

Wherein, described first magnetic steel ring and second magnetic steel ring are separately fixed on the motor shaft, be arranged in the inner chamber of stainless steel cage, corresponding to second magnetic steel ring, with the center of second magnetic steel ring is that the same circumference in the center of circle is provided with n (n=1,2 ... n) individual equally distributed magnetic induction part, the magnetic pole magnetization of described second magnetic steel ring make n magnetic induction part output be the Gray code form in proper order, and adjacent two outputs have only a variation;

On stainless steel cage, corresponding to first magnetic steel ring, with the center of first magnetic steel ring is that the same circumference in the center of circle is provided with the individual magnetic induction part that distributes at an angle of m (m is 2 or 3 integral multiple), the total logarithm of the magnetic pole of described first magnetic steel ring equates with the magnetic pole sum of second magnetic steel ring, and the polarity of two neighboring pole is opposite; Magnetic induction part is arranged on the outer wall of stainless steel cage;

Stainless steel cage outside is by sealing device and body seal and fixing;

When rotor during with respect to stator generation relative rotary motion, described magnetic induction part changes the magnetic signal that senses into voltage signal, and this voltage signal is exported to a signal processing apparatus.

About corresponding to the angle between adjacent two magnetic induction parts of first magnetic steel ring, when m was 2 or 4, this angle was 90 °/g; When m was 3, this angle was 120 °/g; When m was 6, this angle was 60 °/g, and wherein, g is the magnetic pole sum of second magnetic steel ring.

The direct Surface Mount of described magnetic induction part is at the outer surface of stainless steel cage.

Described position-detection sensor also comprises two magnetic guiding loops, and each described magnetic guiding loop is by a plurality of concentrics, constitutes with the segmental arc of radius, and adjacent two segmental arcs leave the space, is located at respectively in this space corresponding to the magnetic induction part of two magnetic steel ring.

The segmental arc end of described magnetic guiding loop is provided with chamfering, for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.

Described magnetic induction part is the hall sensing element.

Described position-detection sensor mainly comprises sensor body, stainless steel cage, sealing device and shell,

Sensor body comprises rotor, and described rotor comprises first magnetic steel ring, second magnetic steel ring,

Wherein, described first magnetic steel ring and second magnetic steel ring are separately fixed in the rotating shaft, and described first magnetic steel ring is evenly geomagnetic into N[N＜=2 ⁿ(n=0,1,2 ... n)] to magnetic pole, and the polarity of two neighboring pole is opposite; The magnetic pole of described second magnetic steel ring adds up to N, and its magnetic order is determined according to the specific magnetic sequence algorithm;

On stainless steel cage,, be that the same circumference in the center of circle is provided with the individual magnetic induction part that distributes at an angle of m (m is 2 or 3 integral multiple) with the center of first magnetic steel ring corresponding to first magnetic steel ring; Corresponding to second magnetic steel ring, be that the same circumference in the center of circle is provided with n (n=0,1,2 with the center of second magnetic steel ring ... n) the individual magnetic induction part that distributes at an angle; Magnetic induction part is arranged on the outer wall of stainless steel cage;

Stainless steel cage outside is by sealing device and body seal and fixing;

When rotor during with respect to stator generation relative rotary motion, described magnetic induction part changes the magnetic signal that senses into voltage signal, and this voltage signal is exported to a signal processing apparatus.

Corresponding to the angle between adjacent two magnetic induction parts of second magnetic steel ring is 360 °/N.

Corresponding to the angle between adjacent two magnetic induction parts of first magnetic steel ring, when m was 2 or 4, the angle between every adjacent two magnetic induction parts was 90 °/N, and when m was 3, the angle between every adjacent two magnetic induction parts was 120 °/N; When m was 6, the angle between every adjacent two magnetic induction parts was 60 °/N.

The direct Surface Mount of described magnetic induction part is on the outer surface of stainless steel cage.

Described position-detection sensor also comprises two magnetic guiding loops, and each described magnetic guiding loop is by a plurality of concentrics, constitutes with the segmental arc of radius, and adjacent two segmental arcs leave the space, is located at respectively in this space corresponding to the magnetic induction part of two magnetic steel ring.

The segmental arc end of described magnetic guiding loop is provided with chamfering, for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.

Described magnetic induction part is the hall sensing element.

The signal processing apparatus of above-mentioned position-detection sensor comprises:

The A/D modular converter, the voltage signal that position-detection sensor is sent carries out the A/D conversion, is digital signal with analog signal conversion;

Relativity shift angle θ ₁Computing module is used for the relative displacement θ of first voltage signal in the signal period of living in that the calculating location detecting sensor is sent corresponding to the magnetic induction part of first magnetic steel ring ₁

Absolute offset values θ ₂Computing module according to second voltage signal that sends corresponding to the magnetic induction part of second magnetic steel ring in the position-detection sensor, is determined the absolute offset values θ that put the residing signal period first place of first voltage signal by calculating ₂

Synthetic and the output module of angle is used for above-mentioned relative displacement θ ₁With absolute offset values θ ₂Addition, the anglec of rotation θ in this moment of the synthetic described first voltage signal representative;

Memory module is used to store data.

Also comprise:

The signal amplification module is used for before the A/D modular converter carries out the A/D conversion voltage signal that comes from position-detection sensor being amplified.

The signal processing apparatus of described position-detection sensor,

Described relativity shift angle θ ₁Computing module comprises first synthesis unit and the first angle acquiring unit, and described first synthesis unit is handled a plurality of voltage signals through the A/D conversion that position-detection sensor sends, and obtains a reference signal D; The described first angle acquiring unit is according to this reference signal D, selects an angle relative with it as deviation angle θ in the first standard standard angle kilsyth basalt ₁

Described relativity shift angle θ ₁Computing module also comprises temperature compensation unit, is used to eliminate the influence of the voltage signal that temperature sends position-detection sensor.

The output of described first synthesis unit also comprises signal R.

Described temperature compensation unit comprises coefficient rectifier and multiplier, and described coefficient rectifier is to the signal R of the output of described synthesis module with to the signal R under should the standard state of signal ₀Compare and obtain output signal K; Described multiplier is a plurality of, and the voltage signal that each described multiplier will send from position-detection sensor, that process A/D changes and the output signal K of described coefficient rectification module multiply each other, and the result after will multiplying each other exports to first synthesis unit.

Described absolute offset values θ ₂Computing module comprises second synthesis unit and the second angle acquiring unit, and described second synthesis unit is used for second voltage signal that the position-detection sensor corresponding to second magnetic steel ring sends is synthesized, and obtains a signal E; The absolute offset values θ that the described second angle acquiring unit selects an angle relative with it to put as the residing signal period first place of first voltage signal in the second standard angle kilsyth basalt according to this signal E ₂

Described sealing device comprises sealing device body and the lead that is located in wherein, the described stainless steel cage and the flange that is tightly connected, seal casinghousing are formed the sealing device body, the flange that is tightly connected links to each other with seal casinghousing, stainless steel cage is located between the two, be provided with first insulation barrier in the seal casinghousing, first insulation barrier, stainless steel cage and seal casinghousing are enclosed to form seal cavity; Offer line outlet on first insulation barrier and the seal casinghousing respectively, lead penetrates the seal cavity of sealing device body from the flange that is tightly connected, and passes from line outlet; Be full of sealing filler in the seal cavity.

Also be provided with second insulation barrier in the described seal cavity, offer line outlet on it; The quantity that is provided with of described second insulation barrier is more than one, and seal cavity is divided into multi-stage sealed space.

Described sealing device comprises the sealing device body, the sealing device body is made up of adpting flange, seal casinghousing and described stainless steel cage, adpting flange links to each other with seal casinghousing, stainless steel cage is located between the two, the two ends of seal casinghousing inner chamber are respectively equipped with the sealing block and first insulation board, sealing block, first insulation board, stainless steel cage and seal casinghousing are enclosed to form seal cavity, are provided with compact heap between sealing block and the adpting flange; Offer through hole respectively on sealing block, first insulation board and the seal casinghousing, first copper rod penetrates the seal cavity of sealing device body from the through hole of seal casinghousing, passes from first insulation board; Be full of sealing filler in the seal cavity.

Described first copper rod is stepped, and setting step post external diameter in the middle is greater than the copper rod external diameter at two ends, and the leave from office terrace of this step post is replaced with first insulation board and contacted; The end of described first copper rod is provided with attachment plug.

Also be provided with second insulation board between described first insulation board and the sealing block, wear second copper rod in the seal cavity that second insulation board and sealing block enclose; First copper rod penetrates the seal cavity of sealing device body from the through hole of seal casinghousing, passes from first insulation board, and passes second insulation board and second copper rod is end to end; Second copper rod passes from the through hole of sealing block.

Also be provided with support plate between described first insulation board and second insulation board, offer through hole on it; The inner chamber of described seal casinghousing is provided with boss, and support plate is installed on the boss.

The quantity that is provided with of described second insulation board and second copper rod is more than one, and seal cavity is divided into multi-stage sealed space.

Described second copper rod is stepped, and an end is set to the step post, and the cylinder external diameter is greater than the second copper rod external diameter of the other end, and the leave from office terrace of this step post is replaced with second insulation board and contacted; The end of described second copper rod is provided with attachment plug.

In sum, the utlity model has following advantage:

1, mounting structure is simple, and easy operating can provide bigger power, preferably resolves the application problem in oily servo system is dived in the down-hole.

2, magneto-electric position-detection sensor non-contact measurement mode has satisfied in the latent oily servo system seal request of servo system in the control cabinet of down-hole.

3, magneto-electric position-detection sensor anti-vibration, oil rub resistance, dust is very competent, the reliability height.Be applicable to the high Precision Detection of motor rotor position under the adverse circumstances.These characteristics make the magneto-electric position-detection sensor become the better selection of latent oily servomotor sensor-based system.

4, compare with the photoelectric type position detecting sensor, operating temperature range is wide.

5, mounting structure of the present utility model is simple, and easy operating preferably resolves the application problem of magneto-electric position-detection sensor in the middle of the latent oily servo system in down-hole.

Description of drawings

Fig. 1 is the internal structure schematic diagram of the first joint of the utility model;

Fig. 2 is the internal structure schematic diagram of the utility model minor details;

Fig. 3 adopts screw thread and flange connection schematic diagram according to first embodiment, four joint motors of the present utility model;

Fig. 4 is the three-dimensional structure diagram of Fig. 3;

Fig. 5 adopts bolt connection schematic diagram according to second embodiment, four joint motors of the present utility model;

Fig. 6 is the three-dimensional structure diagram of Fig. 5;

Fig. 7 adopts two screwed flange connection schematic diagrames according to the 3rd embodiment four joint motors of the present utility model;

Fig. 8 is the three-dimensional structure diagram of Fig. 7;

Fig. 9 A is that two joint submersible electric machine with oil rotors align figure;

Fig. 9 B is that two joint submersible electric machine with oil stators align figure;

Figure 10 is the integral installation structural representation of magneto-electric position-detection sensor on the oily servomotor of diving;

Figure 11 is a magneto-electric position-detection sensor mounting structure exploded view;

Figure 12 is the schematic diagram of the magnetic steel ring in the magneto-electric position-detection sensor;

Figure 13 A and Figure 13 B are the layout schematic diagrames of magnetic induction part and magnetic guiding loop;

Figure 14 is the decomposing schematic representation according to the position-detection sensor scheme that two magnetic induction parts are installed of first embodiment of the present utility model;

Figure 15 is the block diagram according to the signal processing apparatus of the position-detection sensor scheme that two magnetic induction parts are installed of first embodiment of the present utility model;

Figure 16 is the decomposing schematic representation according to the position-detection sensor scheme that three magnetic induction parts are installed of first embodiment of the present utility model;

Figure 17 is the block diagram according to the signal processing apparatus of the position-detection sensor scheme that three magnetic induction parts are installed of first embodiment of the present utility model;

Figure 18 is the decomposing schematic representation according to the position-detection sensor scheme that four magnetic induction parts are installed of first embodiment of the present utility model;

Figure 19 is the block diagram according to the signal processing apparatus of the position-detection sensor scheme that four magnetic induction parts are installed of first embodiment of the present utility model;

Figure 20 is the decomposing schematic representation according to the position-detection sensor scheme that six magnetic induction parts are installed of first embodiment of the present utility model;

Figure 21 is the block diagram according to the signal processing apparatus of the position-detection sensor scheme that six magnetic induction parts are installed of first embodiment of the present utility model;

Figure 22 A-Figure 22 D is the schematic diagram of the chamfer design of magnetic guiding loop;

Figure 23 is the flow chart of signal processing method of the position-detection sensor of first embodiment;

Figure 24 is the exploded perspective view according to the critical component of the position-detection sensor scheme of second embodiment of the present utility model;

Figure 25 is the scheme of installation according to the position-detection sensor scheme of second embodiment of the present utility model;

Figure 26 is the layout schematic diagram of two magnetic induction parts corresponding with first magnetic steel ring among second embodiment;

Figure 27 is the layout schematic diagram of the magnetic induction part when being six pairs of utmost points of the first magnetic steel ring uniform magnetization among second embodiment;

Figure 28 is the pairing magnetic induction part number of second magnetic steel ring among second embodiment resulting coding when being three;

Figure 29 is the order that magnetizes of second magnetic steel ring among second embodiment;

Figure 30 is that the pairing magnetic induction part of second magnetic steel ring among second embodiment is arranged schematic diagram;

Figure 31-Figure 34 is the position-detection sensor signal processing flow figure of second embodiment;

Figure 35 is the block diagram of a signal processing apparatus of the position-detection sensor of second embodiment;

Figure 36 is the structural representation that magnetic induction part adopts the position-detection sensor of surface-mount type installation;

Figure 37 is the exploded perspective view according to the position-detection sensor of the 3rd embodiment;

Figure 38 is an algorithm flow chart of determining the magnetic order of magnetic steel ring 303;

Figure 39 is the example of distributing order of the magnetize structure chart and the magnetic induction part of the magnetic steel ring that obtained by Figure 38;

Figure 40 is the block diagram according to the signal processing apparatus of the position-detection sensor of the 3rd embodiment;

Figure 41 is the cutaway view of a kind of sealing device of the present utility model;

Figure 42 is the cutaway view of another kind of sealing device of the present utility model;

Figure 43 is the structural representation of first copper rod in a kind of sealing device;

Figure 44 is the structural representation of second copper rod in a kind of sealing device;

Figure 45 is a kind of installation overall structure schematic diagram of sealing device;

Figure 46 is installed in the structural representation of axle head for resolver;

Figure 47 is installed in the structural representation of axle head for Mageneto-sensitive type resistor coding device.

Embodiment

Following with reference to accompanying drawing, in conjunction with preferred embodiment of the present utility model the utility model is described, so that those skilled in the art understands more and the easy the utility model of realizing.

Embodiment one

Fig. 1, Fig. 2 are respectively the internal structure schematic diagrames of the first joint of the utility model, minor details.In conjunction with shown in Figure 3, in order to address the above problem, the utility model provides a kind of permanent magnet synchronous servo motor to adopt the more piece form, and purpose is for bigger power is provided.Fig. 3 is that permanent magnet synchronous servo submersible electric machine with oil four joint motors adopt screw thread and flange connection schematic diagram.Fig. 4 is the three-dimensional structure diagram of permanent magnet synchronous servo submersible electric machine with oil.First joint motor 801 is in the top of whole servomotor, is useful on the motor head (not shown) that is connected with protector; Minor details motor 803 is final sections of servomotor, and afterbody is equipped with the motor tailing axle, is used to install magnetic steel ring, and lower flange 810 links with sealing device.Joint motor 802 is connected the form that combines by the flange screw thread in the middle of per two joints with bolt; Armature spindle 805 usefulness shaft couplings 804 connect.Screwed flange 813 and motor casing 800 connect by the bolt (not shown) between upper flange 809, the lower flange 810 by being threaded.This form mainly is to be suitable for the situation of motor casing when thin.

Embodiment two:

With reference to Fig. 5, Fig. 6 is the permanent magnet synchronous servo submersible electric machine with oil assembly structure schematic diagram of the utility model second embodiment.In the present embodiment, most of structure is identical with embodiment one, and identical structure repeats no more.Different is that by the bolt connection, upper flange, lower flange are connected by bolt with electric machine casing in the middle of per in the present embodiment two joint motors.It is thicker that this form is suitable for motor casing, the situation in the time of enough can screwing on bolt.

Embodiment three:

With reference to Fig. 7, Fig. 8 is the permanent magnet synchronous servo submersible electric machine with oil assembly structure schematic diagram of the utility model the 3rd embodiment.In the present embodiment, most of structure is identical with embodiment one, and identical structure repeats no more.Different is, between per in the present embodiment two nodes hit by bolted form.Last screwed flange 811, down screwed flange 812 and electric machine casing 800 (as shown in Figure 5) be by being threaded; Connect by bolt between last screwed flange 811, the following screwed flange 812, wide nut 814,815 two movable nuts of narrow nut are installed on last screwed flange simultaneously, after adjusting the position of respectively saving motor during assembling, finish the general assembly of motor by tightening two nuts 814,815, can prevent the rotation between every joint motor like this.

Connect by shaft coupling 804 between the two joint submersible electric machine with oils of the present utility model, shaft coupling 804 can use spline 806 shaft couplings etc.As Fig. 9 A is the installation diagram of rotor, the N of the motor rotor magnetic steel 808 that is provided with on the adjacent two joint motors during assembling extremely correspondence point-blank, extremely correspondence is point-blank for S.Be depicted as the installation diagram of motor stator as Fig. 9 B, correspondence is point-blank respectively for U phase winding 817-1, the V phase winding 818-1 of the motor stator 816 that is provided with on the two joint motors, W phase winding 819-1 three phase windings.Such two economize on electricity machines are combined into an integral body, make relative lengthening of length of rotor and stator, and the twice when becoming former single-unit motor has been strengthened the magnetic field of stator and rotor, has increased the power of motor.Two joints that multi-section servo motor of the present utility model is adjacent also are provided with alignment bearing 807 between the motors, not only motor is played support, and its coefficient of friction are little, and anti-wear performance is good, and resistance to impact is strong.

Describe position-detection sensor and the signal processing apparatus and the method for this servo submersible motor by the following examples in detail.

Figure 10 is the integral installation structural representation of magneto-electric position-detection sensor on the oily servomotor 700 of diving.Magneto-electric position-detection sensor system is made up of magneto-electric position-detection sensor circuit board 701, magnetic induction part 702, magnetic steel ring 703, magnetic guiding loop 704, seal 705, position-detection sensor line 706, stainless steel cage 708 and shell (not shown) etc., magneto-electric position-detection sensor circuit board 701 is made up of circuit board and magnetic induction part 702, and magnetic induction part for example is a Hall element.Magnetic steel ring 703 is installed on the tailing axle 707 of the oily servomotor of diving, and its position will be followed rotor and rotate together with magnetic guiding loop 704 correspondences outside the stainless steel cage 708, thereby produces sinusoidal magnetic field.Magnetic guiding loop 704 is divided into several magnet ring pieces, and the scheme of magnetic guiding loop 704 will be determined according to whole position-detection sensor magnetic induction part number scheme.Magnetic guiding loop 704 is installed on the step of stainless steel cage 708, constitutes a week, leaves slit between per two magnetic guiding loops, and magnetic induction part 702 is in the middle of the slit of two magnetic guiding loops.The pin of magnetic induction part 702 directly is connected on the circuit board 701 of magneto-electric position-detection sensor, stretch out by circuit board, make magnetic induction part arrive between two magnetic guiding loops, electronic devices and components such as CPU are arranged on the circuit board 701, circuit board 701 is used to handle the signal that magnetic induction part 702 produces, the servo controller that feedback signal is imported in the down-hole control cabinet 709 through position-detection sensor line 706.Be example with first embodiment among Fig. 1, wherein magnetic steel ring, magnetic guiding loop and magnetic induction part have only a cover, magnetic steel ring is single to magnetic pole, yet the utility model is not limited thereto, magnetic steel ring, magnetic guiding loop and magnetic induction part can have two covers, magnetic steel ring can have many to the utmost point, and the back will be described many situations to the utmost point in conjunction with the embodiments.

Magneto-electric position-detection sensor system divides two places to install, and the magnetic steel ring 703 that produces sinusoidal magnetic field is installed on the tailing axle 707 of the oily servomotor of diving, and remaining part constitutes one with seal 705, becomes modularization to install.The steel cage of the seal 705 of magneto-electric position-detection sensor is installed, material will be elected non-magnet_conductible material as, so can adopt stainless steel material, just stainless steel cage 708, both satisfied the sealing intensity requirement, satisfied of the requirement of magneto-electric position-detection sensor system again magnetic circuit.Need to prove except stainless steel cage, other not magnetic conduction, the intensity material that satisfies the sealing intensity requirement also can select for use.

Magnetic steel ring mainly is to produce sinusoidal magnetic field; Magnetic guiding loop plays magnet accumulating cap, and the magnetic flux that magnetic steel ring produces passes through magnetic guiding loop.Circuit board is fixing magnetic induction part and export six road holding wires.Magnetic induction part converts the magnetic field by magnetic guiding loop to voltage signal, and voltage signal directly enters the master control borad chip.By the master control chip on board voltage signal is handled, obtained angular displacement at last.

The magneto-electric position-detection sensor is to utilize Hall effect to detect the position-detection sensor of information such as motor speed, rotor-position, the variation of magnetic induction part energy induced field, magnetic field by magnetic guiding loop is converted to voltage signal, magnetic steel ring is rotated and a week is produced the sinusoidal magnetic field in one or more cycles, produce different magnetic field in different angles, magnetic induction part induces different voltage signals, circuit board passes through connector, the voltage signal of each magnetic induction part is passed to CPU, and CPU calculates the angle position of rotating shaft according to voltage signal.Magnetic induction part is preferably the hall sensing element.The cost of hall sensing component module is low, because magnetic induction part, magnetic steel ring, magnetic guiding loop cost are low, circuit board just passes to CPU with the induced voltage of magnetic induction part, so total cost is also low.

The mounting structure of this position-detection sensor had both reached the requirement of position-detection sensor sealing, make the magneto-electric position-detection sensor be able to operate as normal in abominable latent oily servomotor environment.Drive the magnetic steel ring rotation during motor rotation, thereby generation rotating magnetic field, magnetic guiding loop conducting magnetic field on the stainless steel cover outer surface, the variation of magnetic induction part induced field between two magnetic guiding loop gaps, produce voltage signal, the signal of these variations is processed on magneto-electric position-detection sensor circuit board, and the signal after will handling passes to control cabinet, thereby obtains the signals such as rotor-position, speed of motor.

Figure 11 is the perspective exploded view of magneto-electric position-detection sensor mounting structure, wherein represents identical parts with the Reference numeral identical with Figure 10.Can be seen that by Figure 11 the whole erection structure becomes modularization design, it is an assembly that position-detection sensor circuit board 701, magnetic induction part 702, magnetic guiding loop 704 and seal 705 are installed as that one can set up separately.This makes that the application of this magneto-electric position-detection sensor in the oily servomotor of diving is easy installation and reliable.

Figure 12 is the schematic diagram of the magnetic steel ring in the magneto-electric position-detection sensor.Magnetic steel ring is installed on the tailing axle of motor, along with rotor rotates together, form the sinusoidal magnetic field of the required rotation change of magneto-electric position-detection sensor system, the mode that magnetizes of magnetic steel ring and direction are corresponding with the requirement of corresponding magneto-electric position-detection sensor system.In first embodiment, magnetic steel ring is a pair of magnetic pole; In a second embodiment, magnetic steel ring is many to magnetic pole, and this is how evenly distributed to magnetic pole; In the 3rd embodiment, magnetic steel ring is many to magnetic pole, and these are many presses certain angle to magnetic pole and arrange.

Figure 13 A and Figure 13 B are that the scheme with two magnetic induction parts is the schematic diagram that example is explained the layout of magnetic induction part and magnetic guiding loop.As shown in FIG. 13A, the mode that magnetic induction part 100,101 adopts the surface to paste promptly arranges that at annular stator 102 madial walls 103 is magnetic steel ring, in the scheme of two magnetic induction parts, and two magnetic induction parts 100,101, the 90 ° of layouts of being separated by.In Figure 13 B, two magnetic induction parts 109,110 are sandwiched between the segmental arc (herein being two segmental arcs 111,112) of two or more concentric installations of magnetic guiding loop, and 113 is magnetic steel ring.Although this scheme of sentencing two magnetic induction parts is that example is explained, however the utility model be not limited thereto, the number of every row magnetic induction part can be three, four, six, the segmental arc of corresponding magnetic guiding loop also correspondingly is three, four, six.And can adopt the scheme of two row magnetic induction parts and two magnetic steel ring, this moment, the segmental arc of second magnetic guiding loop also correspondingly changed to some extent, and was not limited to the scheme of 1/4 segmental arc and 3/4 segmental arc or the scheme of even segmentation.

The utility model also provides a kind of signal processing apparatus of the position-detection sensor based on said structure, comprise: A/D modular converter, synthesis module, angle acquisition module and memory module, wherein, the voltage signal that the A/D modular converter sends magnetic induction part in the position-detection sensor carries out the A/D conversion, with analog signal conversion is digital signal, number corresponding to magnetic induction part, have a plurality of A/D converters in this module, be respectively applied for the voltage signal that each magnetic induction part is sent and carry out the A/D conversion; Described synthesis module obtains reference signal D to handling through a plurality of voltage signals of A/D conversion; Described angle acquisition module according to this reference signal D, selects the angle relative with it as deviation angle θ in the angle storage list; Described memory module is used to store data.

Above-mentioned each module can constitute a MCU.Describe position-detection sensor of the present utility model and signal processing apparatus thereof and method by the following examples in detail.

First embodiment

Figure 14 is the decomposing schematic representation according to the position-detection sensor scheme that two magnetic induction parts are installed of first embodiment of the present utility model.Position-detection sensor comprises sensing element 710, circuit board 711, magnetic guiding loop 712, stainless steel cage 713, magnetic steel ring 715 and shell parts such as (not shown), magnetic steel ring 715 is installed on the motor tailing axle 716, and remainder can be installed on the stainless steel cage 713 of sealing device 714.The feature part of this programme is that position-detection sensor has two magnetic induction parts, and magnetic guiding loop 712 also is made up of two parts, and one is 1/4 magnet ring, and one is 3/4 magnet ring.Two incomplete magnet rings form two slits, are used for being used with two magnetic induction parts.

Figure 15 is the block diagram according to the signal processing apparatus of the position-detection sensor scheme that two magnetic induction parts are installed of first embodiment of the present utility model.Magnetic induction part H _1aAnd H _2aOutput signal connect the built-in A/D converter analog input mouth of MCU, after analog-to-digital conversion, obtain output signal and meet multiplier 20a, 21a, the output signal K of coefficient rectifier 5a connects the input of multiplier 20a, 21a, the output signal of multiplier 20a, 21a engages the input of the 3a that grows up to be a useful person, synthesizer 3a output signal D and R, coefficient rectifier 5a receives the signal D and the R of synthesizer 3a output, obtains signal K by computing, by making magnetic induction part H _1aAnd H _2aSignal and this signal K multiply each other, carry out temperature-compensating with this, eliminate the influence of temperature to signal.Store an angle storage list among the memory 40a, MCU selects the angle relative with it as deviation angle θ in the angle storage list according to signal D.

Store a standard angle kilsyth basalt in memory module, wherein stored corresponding to a series of sign indicating number, each sign indicating number is corresponding to an angle.This table obtains by demarcation, scaling method is, utilize a checkout gear and a high precision position transducer of originally executing example, carry out correspondence one by one with originally executing the signal of the magnetic induction part output in the example and the angle of this high precision position transducer output, set up out the signal of magnetic induction part output and the relation table between the angle with this.

In addition, in memory module, also store some data corrections, comprised a signal D and signal R in these tables ₀Correspondence table, signal R wherein ₀For the signal of signal R under standard state, by synthesis module, promptly the signal D that obtains of synthesizer 3a can obtain a signal R by tabling look-up ₀, by with signal R ₀R compares with signal, as division arithmetic, obtains signal K.

Wherein to Signal Processing, be that synthesizer 3a is to the Signal Processing principle: the size of the numerical value of two signals relatively, the signal D that is used to export that numerical value is little, the structure of signal D for first signal meet the position, second signal meet the position, than the value bit of the signal of fractional value }.With the present embodiment is example, is described as follows:

Agreement:

When data X was signed number, the 0th of data X (a binary system left side is played the 1st) be sign bit, and X_0=1 represents data X for bearing, and X_0=0 represents that data X is for just.

X_D represents the value bit (absolute values of data) of data X, promptly removes sign bit data left position.

If A_D＞=B_D

D＝{A_0；B_0；B_D}

$R=\sqrt{{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="H2009201500451E00081.png,H2009201500451E00192.png"\; state="\{\{state\}\}">A</figure-callout>}}^2+{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="H2009201500451E00081.png,H2009201500451E00192.png"\; state="\{\{state\}\}">B</figure-callout>}}^2};$

Otherwise:

D＝{A_0；B_0；A_D}

$R=\sqrt{{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="H2009201500451E00081.png,H2009201500451E00192.png"\; state="\{\{state\}\}">A</figure-callout>}}^2+{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="H2009201500451E00081.png,H2009201500451E00192.png"\; state="\{\{state\}\}">B</figure-callout>}}^2}.$

Figure 16 is the decomposing schematic representation according to the position-detection sensor scheme that three magnetic induction parts are installed of first embodiment of the present utility model.The scheme of the mounting means of its each several part assembly and two magnetic induction parts similar is so no longer repeat at this.The feature part of this programme is that position-detection sensor has three magnetic induction parts, and magnetic guiding loop also is made up of three parts, and per two incomplete magnet rings form slit, form three slits altogether, are used for being used with three magnetic induction parts.

Figure 17 is the block diagram according to the signal processing apparatus of the position-detection sensor scheme that three magnetic induction parts are installed of first embodiment of the present utility model.Position-detection sensor comprises sensing element 717, circuit board 718, magnetic guiding loop 719, stainless steel cage 720, magnetic steel ring 722 and shell parts such as (not shown), the 721st, sealing device, the 723rd, motor tailing axle.Similar in the scheme of the signal processing apparatus of this programme and two magnetic induction parts, difference is that magnetic induction part has three, the signal of exporting to synthesizer is three, synthesizer different when accepting or rejecting signal and in the such scheme.Only illustrate how synthesizer accepts or rejects signal here.

Synthesizer 3c to the Signal Processing principle is: the position that meets of judging three signals earlier, and relatively meet the size of the numerical value of the identical signal in position, the signal D that is used to export that numerical value is little, the structure of signal D for first signal meet the position, second signal meet the position, the 3rd signal meet the position, than the value bit of the signal of fractional value }.With the present embodiment is example:

Agreement:

When data X was signed number, the 0th of data X (a binary system left side is played the 1st) be sign bit, and X_0=1 represents data X for bearing, and X_0=0 represents that data X is for just.

X_D represents the value bit (absolute values of data) of data X, promptly removes sign bit data left position.

If { A_0; B_0; C_0}=010 and A_D＞=C_D

D＝{A_0；B_0；C_0；C_D}

If { A_0; B_0; C_0}=010 and A_D＜C_D

D＝{A_0；B_0；C_0；A_D}

If { A_0; B_0; C_0}=101 and A_D＞=C_D

D＝{A_0；B_0；C_0；C_D}

If { A_0; B_0; C_0}=101 and A_D＜C_D

D＝{A_0；B_0；C_0；A_D}

If { A_0; B_0; C_0}=011 and B_D＞=C_D

D＝{A_0；B_0；C_0；C_D}

If { A_0; B_0; C_0}=011 and B_D＜C_D

D＝{A_0；B_0；C_0；B_D}

If { A_0; B_0; C_0}=100 and B_D＞=C_D

D＝{A_0；B_0；C_0；C_D}

If { A_0; B_0; C_0}=100 and B_D＜C_D

D＝{A_0；B_0；C_0；B_D}

If { A_0; B_0; C_0}=001 and B_D＞=A_D

D＝{A_0；B_0；C_0；A_D}

If { A_0; B_0; C_0}=001 and B_D＜A_D

D＝{A_0；B_0；C_0；B_D}

If { A_0; B_0; C_0}=110 and B_D＞=A_D

D＝{A_0；B_0；C_0；A_D}

If { A_0; B_0; C_0}=110 and B_D＜A_D

D＝{A_0；B_0；C_0；B_D}

$\mathrm{\&alpha;}=A-B\&times;\cos \left(\frac{\mathrm{\&pi;}}{3}\right)-C\&times;\cos \left(\frac{\mathrm{\&pi;}}{3}\right)$

$\mathrm{\&beta;}=B\&times;\sin \left(\frac{\mathrm{\&pi;}}{3}\right)-C\&times;\sin \left(\frac{\mathrm{\&pi;}}{3}\right)$

$R=\sqrt{{\mathrm{\&alpha;}}^2+{\mathrm{\&beta;}}^2}$

Figure 18 is the decomposing schematic representation according to the position-detection sensor scheme that four magnetic induction parts are installed of first embodiment of the present utility model.Position-detection sensor comprises sensing element 724, circuit board 725, magnetic guiding loop 726, stainless steel cage 727, magnetic steel ring 729 and shell parts such as (not shown), sealing device 728, motor tailing axle 730.The scheme of the mounting means of its each several part assembly and two magnetic induction parts similar is so no longer repeat at this.The feature part of this programme is that position-detection sensor has four magnetic induction parts, and magnetic guiding loop also is made up of four parts, and per two incomplete magnet rings form slit, form four slits altogether, are used for being used with four magnetic induction parts.

Figure 19 is the block diagram according to the signal processing apparatus of the position-detection sensor scheme that four magnetic induction parts are installed of first embodiment of the present utility model.Similar in the scheme of the signal processing apparatus of scheme and two magnetic induction parts, difference is, increased differential amplification module, suppress temperature and null offset by this differential amplification module, improve data precision with this, the signal of finally exporting to synthesizer still is two, and the scheme of processing procedure and method and two transducers identical no longer repeated at this.

Figure 20 is the decomposing schematic representation according to the position-detection sensor scheme that six magnetic induction parts are installed of first embodiment of the present utility model.Position-detection sensor comprises sensing element 731, circuit board 732, magnetic guiding loop 733, stainless steel cage 734, magnetic steel ring 736 and shell parts such as (not shown), the 735th, sealing device, the 737th, motor tailing axle.The scheme of the mounting means of its each several part assembly and two magnetic induction parts similar is so no longer repeat at this.The feature part of this programme is that position-detection sensor has six magnetic induction parts, and magnetic guiding loop also is made up of six parts, and per two incomplete magnet rings form slit, form six slits altogether, are used for being used with six magnetic induction parts.

Figure 21 is the block diagram according to the signal processing apparatus of the position-detection sensor scheme that six magnetic induction parts are installed of first embodiment of the present utility model.Similar in the scheme of the signal processing apparatus of scheme and three magnetic induction parts, difference is, increased differential amplification module, suppress temperature and null offset by this differential amplification module, improve data precision with this, the signal of finally exporting to synthesizer still is three, and the scheme of processing procedure and method and three transducers identical no longer repeated at this.

Figure 22 A-Figure 22 D is an example with the magnetic guiding loop that is made of 1/4 segmental arc and 3/4 segmental arc, illustrates the chamfer design of magnetic guiding loop of the present utility model.As Figure 22 A to shown in Figure 22 D, magnetic guiding loop is made of the segmental arc of two sections or the same radius of multistage, concentric, magnetic guiding loop shown in Figure 22 A does not design chamfering, Figure 22 B is provided with chamfering to the segmental arc end shown in Figure 22 D, described chamfering be vertically (Figure 22 B) or radially (Figure 22 C) or vertically simultaneously, the chamfering that forms of (Figure 22 D) cutting radially, 151,153 expression axial slices, 152,154 expression radial sections.Leave the slit between adjacent two segmental arcs, magnetic induction part places in this slit, and when magnetic steel ring and magnetic guiding loop generation relative rotary motion, described magnetic induction part is converted to voltage signal with the magnetic signal that senses, and this voltage signal is transferred to corresponding controller.According to magnetic Migong formula

Can know, when φ is certain, can increase B by reducing S.Because the magnetic flux that permanent magnet produces is certain, S is bigger in magnetic guiding loop, so B is smaller, therefore can reduce the heating that causes because of the magnetic field alternation.And can increase the magnetic field intensity of end by reducing magnetic guiding loop end area, make the output signal of magnetic induction part strengthen.Such picking up signal structure manufacturing process is simple, and the signal noise of picking up is little, and production cost is low, the reliability height, and also size is little.Though the scheme with two segmental arcs is the chamfer design that example has been described magnetic guiding loop, however the utility model be not limited thereto, magnetic guiding loop is that the scheme of three segmental arcs, four segmental arcs, six segmental arcs can adopt similar chamfer design, is not described in detail at this.

Figure 23 is the flow chart of signal processing method of the position-detection sensor of first embodiment.As shown in figure 23, the signal processing method according to the position-detection sensor of present embodiment may further comprise the steps:

S100, a plurality of voltage signals that position-detection sensor is sent carry out the A/D conversion; S101, a plurality of voltage signals that the process A/D that position-detection sensor is sent changes are handled and are obtained reference signal D; S102 according to this reference signal D, selects the angle relative with it as deviation angle θ in the angle storage list.

Preferably, described method also comprises: in step S101, when a plurality of voltage signals of changing through A/D are handled, obtain signal R when obtaining reference signal D; Step S 103, according to the reference signal R that obtains ₀Carry out computing with R, obtain signal K; Before a plurality of voltage signals through the A/D conversion that position-detection sensor is sent are handled, described a plurality of voltage signals are multiplied each other with signal K respectively, thereby realization is to the temperature-compensating of voltage signal.

More than be the mount scheme that example has been described position-detection sensor of the present utility model with the scheme that adopts magnetic guiding loop, and the utility model can also adopt the mode of Surface Mount that magnetic induction part is installed.Because similar in the mounting means of remainder except the mounting means of magnetic induction part and the foregoing description be not so repeat them here.

Second embodiment

In a second embodiment, magnetic steel ring, magnetic guiding loop respectively are two, and magnetic induction part also correspondingly has two row, and these are critical components of position-detection sensor, and similar among the installation of other parts in addition and structure and first embodiment do not repeat them here.

Figure 24 is the exploded perspective view according to the critical component of the position-detection sensor scheme of second embodiment of the present utility model.Figure 25 is the scheme of installation according to the position-detection sensor scheme of second embodiment of the present utility model.The position-detection sensor of present embodiment comprises rotor and rotor is enclosed within inner stator, rotor comprises the first magnetic steel ring 201a and the second magnetic steel ring 201b and the first magnetic guiding loop 205a and the second magnetic guiding loop 205b, the first magnetic steel ring 201a and the second magnetic steel ring 201b are separately fixed on the motor shaft 200, and wherein stator is a support 203.The first magnetic guiding loop 205a and the second magnetic guiding loop 205b leave the space respectively by a plurality of concentrics, constitute with the segmental arc of radius between adjacent two segmental arcs, are located at respectively in this space corresponding to the magnetic induction part 204 of two magnetic steel ring.Magnetic induction part is arranged on the outer wall of stainless steel cage, stainless steel cage outside is by sealing device and body seal and fixing, when rotor rotatablely moved, described magnetic induction part changed the magnetic signal that senses into voltage signal, and this voltage signal is exported to a signal processing apparatus.

The first magnetic steel ring 201a is magnetized to g (value of g equals the magnetic pole sum in second magnetic steel ring) uniformly to the utmost point (the N utmost point and the S utmost point are alternately arranged), and when the magnetic pole in second magnetic steel ring add up to 6, the number of pole-pairs of the first magnetic steel ring 201a was 6 pairs.Center with the first magnetic steel ring 201a is on the same circumference in the center of circle, is provided with m magnetic induction part, and as 2, as shown in figure 26, the angle between two magnetic induction parts 204 is 90 °/6.The layout of magnetic induction part as shown in figure 27 when first magnetic steel ring was magnetized to 6 pairs of utmost points equably.When rotor during with respect to stator generation relative rotary motion, described magnetic induction part changes the magnetic signal that senses into voltage signal, and this voltage signal is exported to a signal processing apparatus.

Define that adjacent a pair of " N-S " is a signal period in first magnetic steel ring, therefore, the mechanical angle that arbitrary " N-S " is corresponding is 360 °/g (g be " N-S " number), supposes that rotor is positioned at n at t moment anglec of rotation θ ^ThIn signal period, then this constantly angular displacement can think and constitute by two parts: 1. at n ^ThRelative displacement in signal period, magnetic induction part H ₁And H ₂Respond to the magnetic field of first magnetic steel ring and determine " N-S " side-play amount θ in the signal period at this ₁(value greater than 0 less than 360 °/g); 2. n ^ThThe absolute offset values θ that put the signal period first place ₂, use transducer H ₃, H ₄... H _nThe magnetic field of reaction magnetic ring 2 determines this moment, rotor was to be in which " N-S " to obtain θ actually ₂

Corresponding to the second magnetic steel ring 201b, with the center of the second magnetic steel ring 201b is that the same circumference in the center of circle is provided with n (n=1,2 ... n) individual equally distributed magnetic induction part, the magnetic pole magnetization of second magnetic steel ring make n magnetic induction original paper output be the Gray code form in proper order.The polarity of magnetic pole be Gray code the first place for " 0 " corresponding to " N/S " utmost point, the first place is that " 1 " is corresponding to " S/N " utmost point.For example, when n is 3, obtain coding as shown in figure 28, obtain the order that magnetizes of second magnetic steel ring as shown in figure 29, as shown in figure 30, carry out reading around three magnetic induction parts are uniform.

The utility model also provides a kind of signal processing apparatus based on this position-detection sensor and principle thereof, and it comprises: A/D modular converter, relative displacement θ ₁Computing module, absolute offset values θ ₂Computing module and memory module.Its signal processing flow such as Figure 31-shown in Figure 34, the voltage signal that first magnetic steel ring in the sensor body and second magnetic steel ring are sent carries out the A/D conversion, is digital signal with analog signal conversion; By relative displacement θ ₁Computing module carries out angle θ to first voltage signal corresponding to first magnetic steel ring that position-detection sensor sends ₁Find the solution, calculate the relative displacement θ of signal in the signal period of living in corresponding to first magnetic steel ring ₁By absolute offset values θ ₂Computing module carries out angle θ to first voltage signal corresponding to second magnetic steel ring that position-detection sensor sends ₂Find the solution, determine the absolute offset values θ that put the residing signal period first place of first voltage signal ₂Synthetic and output module is used for above-mentioned relative displacement θ as adder by angle ₁With absolute offset values θ ₂Addition, the anglec of rotation θ in this moment of the synthetic described first voltage signal representative.For Figure 32, be the signal amplification module that on the basis of Figure 31, increases, concrete as amplifier, be used for before the A/D modular converter carries out the A/D conversion, the voltage signal that comes from sensor body being amplified.Figure 33 is the signal processing flow figure that comprises temperature-compensating, is carrying out angle θ ₁Before finding the solution, also comprise the process of temperature-compensating; Figure 34 is the detailed process based on the temperature-compensating of Figure 33, when promptly carrying out temperature-compensating, advanced row coefficient to correct, and the output of again signal and the coefficient of A/D converter output being corrected is then carried out temperature-compensating by the concrete mode that multiplier multiplies each other.Certainly, the concrete mode of temperature-compensating is a variety of in addition, does not just introduce one by one a little.

Relative displacement θ ₁Computing module comprises signal synthesis unit, first angle acquiring unit and the temperature compensation unit, and the voltage signal through the A/D conversion that signal synthesis unit sends the diverse location detecting sensor is handled, and obtains a reference signal D; The described first angle acquiring unit is according to this reference signal D, selects an angle relative with it as deviation angle θ in the first standard angle kilsyth basalt ₁Wherein, before obtaining reference signal D, earlier the signal that inputs to signal synthesis unit is carried out temperature-compensating by temperature compensation unit, the signal after the temperature-compensating is handled obtaining signal D again.Processing described here will describe in detail in the back.Absolute offset values θ ₂Computing module comprises second synthesizer and the described second angle acquiring unit, be used for second voltage signal that the position-detection sensor corresponding to second magnetic steel ring sends is synthesized, obtain axle and turn over the signal period number, thereby determine the absolute offset values θ that put the residing signal period first place of first voltage signal ₂, specific implementation is that described second synthesizer synthesizes second voltage signal that the position-detection sensor corresponding to second magnetic steel ring sends, and obtains a signal E; The absolute offset values θ that the described second angle acquiring unit selects an angle relative with it to put as the residing signal period first place of first voltage signal in the second standard angle kilsyth basalt according to this signal E ₂

Figure 35 is the block diagram of a signal processing apparatus of the position-detection sensor of present embodiment.In this example, first magnetic steel ring is provided with two magnetic induction parts, the output signal of transducer 1_1 and 1_2 meets amplifier 2_1,2_2 amplifies, meet A/D converter 3_1 then, 3_2, after analog-to-digital conversion, obtain output signal and meet multiplier 4_1,5_1, coefficient rectifier 10_1 output signal meets multiplier 4_1, the input of 5_1, multiplier 4_1, the output signal A of 5_1, B connects the input of the first synthesizer 6_1, the first synthesizer 6_1 is to signal A, B handles, obtain signal D, R selects an angle relative with it as deviation angle θ in the standard angle kilsyth basalt of storing from memory 8_1 according to signal D ₁Wherein, the output signal R of first synthesizer 61 flows to coefficient rectifier 10_1, and coefficient rectifier 10_1 tables look-up according to signal R with from memory 9_1 and obtains signal R ₀Obtain signal K, this signal K is as another input of multiplier 4_1,5_1, obtains signal A, the B input as the first synthesizer 6_1 though divide to multiply each other with signal C1, C2 from amplifier 2_1,2_2 output.

Transducer 1_3,1_4 ... the output signal of 1_n connect respectively amplifier 2_3,2_4 ... 2_n amplifies, connect then A/D converter 3_3,3_4 ... 3_n carries out synthesizing by the second synthesizer 7_1 after the analog-to-digital conversion, obtains a signal E; According to the absolute offset values θ that selects an angle relative to put in the second standard angle kilsyth basalt of this signal E in memory 11_1 as the residing signal period first place of first voltage signal with it ₂, θ ₁And θ ₂Export θ by the absolute angle displacement that adder 121 obtains measuring.

The function of second synthesizer 71 is, by to transducer H _3e, H _4e... H _NeSignal synthesize, obtain this constantly rotor be in which " N-S " in the signal period.The processing of second synthesizer 71 is: when data X was signed number, the 0th of data X (a binary system left side is played the 1st) be sign bit, and X_0=1 represents data X for bearing, and X_0=0 represents that data X is for just.Also, be output as X_0=0, otherwise be X_0=1 promptly when the magnetic field of induction when being N.

Then for present embodiment, E={C3_0; C4_0; Cn_0}.

Wherein, the first synthesizer 6-1 to Signal Processing is: the size of the numerical value of two signals relatively, the signal D that is used to export that numerical value is little, the structure of signal D for first signal meet the position, second signal meet the position, than the value bit of the signal of fractional value }.Specific as follows:

Here agreement (hereinafter each synthesizer all uses this agreement), when data X was signed number, the 0th of data X (a binary system left side is played the 1st) be sign bit, and X_0=1 represents data X for bearing, and X_0=0 represents that data X is for just.X_D represents the value bit (absolute values of data) of data X, promptly removes the remaining data bit of sign bit.

If A_D＞=B_D

D＝{A_0；B_0；B_D}

$R=\sqrt{{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="H2009201500451E00081.png,H2009201500451E00192.png"\; state="\{\{state\}\}">A</figure-callout>}}^2+{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="H2009201500451E00081.png,H2009201500451E00192.png"\; state="\{\{state\}\}">B</figure-callout>}}^2};$

Otherwise:

D＝{A_0；B_0；A_D}

$R=\sqrt{{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="H2009201500451E00081.png,H2009201500451E00192.png"\; state="\{\{state\}\}">A</figure-callout>}}^2+{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="H2009201500451E00081.png,H2009201500451E00192.png"\; state="\{\{state\}\}">B</figure-callout>}}^2};$

Signal K generally is by with signal R ₀Carrying out division arithmetic with R obtains.

For first and second standard angle kilsyth basalt, in memory, stored two tables, each table is corresponding to a series of sign indicating number, and each sign indicating number is corresponding to an angle.This table obtains by demarcation, scaling method is, utilize a checkout gear and a high precision position transducer of originally executing example, carry out correspondence one by one with originally executing the signal of the magnetic induction part output in the example and the angle of this high precision position transducer output, set up out the signal of magnetic induction part output and the relation table between the angle with this.Just, stored one first standard angle kilsyth basalt corresponding to signal D, each signal D represents a relative displacement θ ₁Corresponding to signal E, stored one second standard angle kilsyth basalt, each signal E represents an absolute offset values θ ₂

The utility model is not limited to above-mentioned example, first magnetic steel ring can also be provided with three, four, six magnetic induction parts, corresponding magnetic guiding loop and signal processing circuit also will be done respective change, yet it changes similar with described in first embodiment, so do not repeat them here.

When being provided with magnetic guiding loop, the segmental arc end of magnetic guiding loop is provided with chamfering, for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.

As an alternative, magnetic induction part directly Surface Mount on the outer surface of stainless steel cage, promptly be not provided with magnetic guiding loop, as shown in figure 36.Other parts with and signal processing apparatus and the similar of magnetic guiding loop arranged, do not repeat them here.

The 3rd embodiment

Among the 3rd embodiment, similar among the number of each parts and mount scheme thereof and second embodiment, different is the mode that magnetizes of magnetic steel ring and the position of magnetic induction part.

Figure 37 is the exploded perspective view according to the position-detection sensor of the 3rd embodiment.On skeleton 306, be respectively equipped with two row magnetic induction parts 307 corresponding to magnetic steel ring 302, magnetic steel ring 303.One row magnetic induction part only is shown among the figure, for convenience of description, here a plurality of magnetic induction parts that with the first row magnetic induction part are corresponding magnetic steel ring 302 and magnetic guiding loop 304 all use magnetic induction part 307 to represent, and are that a plurality of magnetic induction parts of corresponding magnetic steel ring 303 and magnetic guiding loop 305 are also represented with magnetic induction part 307 with the secondary series magnetic induction part.For convenience of description, here magnetic steel ring 302 is defined as first magnetic steel ring, magnetic steel ring 303 is defined as second magnetic steel ring, magnetic guiding loop 304 is defined as corresponding to first magnetic steel ring, magnetic guiding loop 305 is defined as corresponding to second magnetic steel ring, yet the utility model is not limited to above-mentioned qualification.

First magnetic steel ring 302 is evenly geomagnetic into N to magnetic pole, N≤2 ⁿ(n=0,1,2 ... n), and the polarity of two neighboring pole is opposite, and the magnetic pole of second magnetic steel ring adds up to N, and its magnetic order is determined according to the magnetic order algorithm; On axle 301,, be that the same circumference in the center of circle is provided with the individual magnetic induction part 307 that distributes at an angle of m (m is 2 or 3 integral multiple) with the center of first magnetic steel ring 302 corresponding to first magnetic steel ring 302; Corresponding to second magnetic steel ring 303, be that the same circumference in the center of circle is provided with n (n=0,1,2 with the center of second magnetic steel ring 303 ... n) the individual magnetic induction part 307 that is 360 °/N angular distribution.

Figure 38 is the magnetic order algorithm flow chart of magnetic steel ring 303.As shown in figure 38, be example with the situation of three magnetic induction parts, at first carry out initialization a[3]=" 0,0,0 "; Then present encoding is gone into coded set, " 0,0,0 " is promptly arranged in the coded set; Then check the set element of coded set whether to reach 2 ⁿ, if EP (end of program) then, otherwise present encoding is moved to left one, the back mends 0; Check present encoding whether to go into coded set then, if do not go into coded set then present encoding is gone into coded set proceed above-mentioned steps, if gone into coded set then go 0 to mend 1 position, current sign indicating number end; Then check present encoding whether to go into coded set, if do not go into coded set then present encoding gone into coded set proceed above-mentioned steps, if gone into coded set then checked whether current sign indicating number is " 0 ... 0 ", be then to finish, otherwise with present encoding directly before go to position, sign indicating number end to go 0 to mend 1; Then check present encoding whether to go into coded set,,, proceed following procedure then if gone into coded set then check whether current sign indicating number is " 0 ... 0 " if do not go into coded set then present encoding is gone into coded set proceed above-mentioned steps.Wherein 0 be magnetized to " N ", 1 is magnetized to " S ".Magnetic steel ring shown in Figure 39 303 magnetize structure chart and H have been obtained like this ₃, H ₄And H ₅Distributing order.

In the present embodiment, be 360 °/N corresponding to the angle between adjacent two magnetic induction parts of described second magnetic steel ring.About corresponding to the angle between adjacent two magnetic induction parts of described first magnetic steel ring, when m was 2 or 4, the angle between every adjacent two magnetic induction parts was 90 °/N, and when m was 3, the angle between every adjacent two magnetic induction parts was 120 °/N; When m was 6, the angle between every adjacent two magnetic induction parts was 60 °/N.

Figure 40 is the block diagram according to the signal processing apparatus of the position-detection sensor of the 3rd embodiment.Because its signal processing mode and second embodiment's is similar, so do not repeat them here.

First magnetic steel ring can be provided with two, three, four, six magnetic induction parts, and is corresponding

First magnetic steel ring can be provided with two, three, four, six magnetic induction parts, and corresponding magnetic guiding loop and signal processing circuit also will be done respective change, yet it changes similar with described in first embodiment, so do not repeat them here.

When being provided with magnetic guiding loop, the segmental arc end of magnetic guiding loop is provided with chamfering, for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.

As an alternative, magnetic induction part directly Surface Mount promptly is not provided with magnetic guiding loop on the outer surface of stainless steel cage, other parts with and signal processing apparatus and the similar of magnetic guiding loop arranged, do not repeat them here.

Similar among the signal processing method of the position-detection sensor of present embodiment and second embodiment is so be repeated in this description it in this omission.

Figure 41 is the whole generalized section of a kind of sealing device of the present utility model.As shown in figure 41, present embodiment provides a kind of sealing device 901, and sealing device 901 comprises sealing device body and the lead 910 that is located in wherein.The sealing device body is made up of the flange 911 that is tightly connected, seal casinghousing 912 and stainless steel cage 913.The flange 911 that is tightly connected links to each other with seal casinghousing 912, and stainless steel cage 913 is located between the two.In order to satisfy the needs of the oily servomotor of diving, the material of stainless steel cage 913 is a stainless steel in the present embodiment, and selected material.Should be with understanding, constant for guaranteeing structure under specific use occasion, can select the material of stainless steel cage 913 according to actual conditions.Seal casinghousing 912 is supporting members of whole sealing device 901.In seal casinghousing 912, be provided with first insulation barrier 914.First insulation barrier 914, stainless steel cage 913 outer walls and seal casinghousing 912 inwalls are enclosed to form seal cavity.Offer line outlet 915 respectively on first insulation barrier 914 and seal casinghousing 912, lead 910 penetrates the seal cavity of sealing device body from the flange 911 that is tightly connected, and twines in seal cavity, passes from line outlet 915 then.Seal casinghousing 912 is threaded with stainless steel cage 913 at its line outlet 915 ends, and scribbles thread locking adhesive, thereby makes sealing between seal casinghousing 912 and the stainless steel cage 913.Be full of sealing filler 916 in the seal cavity, for example epoxy glue.Certainly, also can adopt bonded adhesives high temperature resistant, that viscosity is good according to actual needs, can reach good sealing effectiveness equally.

In addition, in the seal cavity that surrounds by first insulation barrier 914, stainless steel cage 913 and seal casinghousing 912, can also be provided with second insulation barrier 917.On second insulation barrier 917, also offer line outlet (figure does not show), so that lead 910 passes.

Also be provided with second insulation barrier in the seal cavity, offer line outlet on it; The quantity that is provided with of described second insulation barrier is more than one, and seal cavity is divided into multi-stage sealed space.

Figure 42 is the cutaway view of another kind of sealing device of the present utility model.As shown in figure 42, can also be provided with second insulation board 960 between first insulation board 957 and the sealing block 956, insulation board can adopt the high strength insulation board, and offers the hole that is used for by copper rod on it, wears second copper rod 961 in the seal cavity that second insulation board 960 and sealing block 956 enclose; First copper rod 954 penetrates the seal cavity of sealing device body from the through hole of seal casinghousing 952, passes from first insulation board 957, and passes second insulation board 960 and second copper rod 961 is end to end; Second copper rod 961 passes from the through hole of sealing block 956.

In addition, between first insulation board 957 and second insulation board 960, can be provided with support plate 962, offer through hole on the support plate 962.It should be noted that the internal diameter of the through hole of offering on the support plate 962 is greater than the external diameter of first copper rod 954 or second copper rod 961, to prevent conducting between the support plate 962 and first copper rod 954 or second copper rod 961.In addition, the inner chamber of seal casinghousing 952 is provided with boss 965, support plate 962 can be installed on the boss 965.

Figure 43 is the structural representation of first copper rod in the sealing device.As shown in figure 43, first copper rod 954 is stepped, and is thick in the middle of promptly adopting, the multidiameter form that two is thin, and setting step post 963 external diameters in the middle are greater than the copper rod external diameter at two ends, and the leave from office terrace of this step post 963 is replaced with first insulation board 957 and is contacted.Prevent that by this step first copper rod 954 from wearing because of bearing excessive pressure of pressure, simultaneously pressure is passed to first insulation board 957, make pressure even, transfer the pressure to the bottom of seal casinghousing 952 again by first insulation board 957.In addition, the end of first copper rod 954 is equipped with attachment plug 955.

Figure 44 is the structural representation of second copper rod in the sealing device.As shown in figure 44, second copper rod 961 also is stepped, i.e. the multidiameter form.Its bottom is thick step post 964, and the cylinder external diameter is greater than the external diameter of the other end, and the leave from office terrace of this step post 964 is replaced with second insulation board 960 and contacted.Because the lower end of second copper rod 961 slightly and with second insulation board 960 contacts, after therefore second insulation board 960 is given in the pressure uniform distribution that second copper rod 961 is subjected to, pass to following support plate 962 again, be delivered at last on the seal casinghousing 952.Copper rod adopts the multidiameter form, can avoid lead directly to be forced out sealing device because of pressure is excessive in the epoxy resin layer of embedding and cause seal failure.In addition, on thicker step post 964, be provided with screwed hole, be used for being connected, thereby realize conducting between interior first copper rod 954 of sealing device and second copper rod 961 with first copper rod 954.The end of the less external diameter of second copper rod 961 is provided with attachment plug 955.

As an alternative, also be provided with support plate between first insulation board and second insulation board, offer through hole on it; The inner chamber of described seal casinghousing is provided with boss, and support plate is installed on the boss.

The quantity of second insulation board 960 and second copper rod 961 can be set to a plurality of as the case may be with needs, thereby seal cavity is divided into multi-stage sealed space.Can be provided with support plate 962 between adjacent two second insulation boards 960, offer through hole on the support plate 962.

Figure 45 is the installation overall structure schematic diagram of sealing device.As shown in figure 45, sealing device 971 and is connected with control cabinet 973 with latent oily servomotor 972 between latent oily servomotor 972 and control cabinet 973.Specifically, the seal casinghousing 952 of sealing device 971 is connected with control cabinet 973 at the end that first copper rod 954 passes, and for example can connect by screw thread.The flange 951 that is tightly connected of sealing device 971 is connected with latent oily servomotor 972, for example can connect by bolt.

Although be that example describes with the oily encoder of diving among above each figure, yet the sensor body in the submersible servodrive system can also be resolver or Mageneto-sensitive type resistor coding device.Figure 46 and Figure 47 are respectively the profiles of resolver and Mageneto-sensitive type resistor coding device.Reference numeral among the figure is represented: sealing shroud 91, seal outer wall 92, dividing plate 93, fluid sealant 94, binding post 95, resolver stator 96, motor tailing axle 97, resolver rotor 98, resolver circuit board 99, magneto sensor 90, magnetic steel ring 88, encoder circuit plate 89.

It should be noted that at last: above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.Although the utility model is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that, still can make amendment and be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of the technical program, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims (39)

1. multi-section servo submersible motor, mainly comprise motor body, the motor casing of motor body head links to each other with head flanges, the head of motor shaft convexedly stretches in outside the head flanges, motor shaft is fixed in the head flanges and links to each other with other devices by described head flanges, it is characterized in that, include the more piece motor in the described motor body, mainly comprise stator and rotor in the motor casing of every joint motor, rotor is a permanent magnet, be provided with winding in the stator core, the armature spindle of two adjacent joint motors connects by shaft coupling; The motor casing of two adjacent joint motors connects by jockey; The N of the rotor that is provided with on the adjacent two joint motors extremely correspondence point-blank, extremely correspondence is point-blank for S; The U of motor stator, V, W three phase windings difference correspondence are point-blank.

2. multi-section servo submersible motor as claimed in claim 1 is characterized in that, two joints that described multi-section servo motor is adjacent also are provided with alignment bearing between the motors, and motor is supported.

3. multi-section servo submersible motor as claimed in claim 1 is characterized in that the afterbody of described motor shaft links to each other with encoder by sealing device.

4. multi-section servo submersible motor as claimed in claim 3 is characterized in that, described encoder is resolver or Mageneto-sensitive type resistor coding device or position-detection sensor.

5. multi-section servo submersible motor as claimed in claim 4, it is characterized in that, described position-detection sensor, it is characterized in that, this position-detection sensor mainly comprises sensor body, stainless steel cage, sealing device and shell, and sensor body comprises magnetic steel ring, magnetic guiding loop and magnetic induction part; Magnetic guiding loop is arranged on the outer wall of stainless steel cage, is made of the segmental arc of two sections or the same radius of multistage, concentric, and adjacent two segmental arcs leave the slit; Magnetic induction part places in this slit; Magnetic steel ring is arranged in the inner chamber of stainless steel cage, is fixed on the machine shaft; Stainless steel cage outside is by sealing device and body seal and fixing; When magnetic steel ring and magnetic guiding loop generation relative rotary motion, described magnetic induction part is converted to voltage signal with the magnetic signal that senses, and this voltage signal is transferred to the corresponding signal process device.

6. multi-section servo submersible motor as claimed in claim 5 is characterized in that, described magnetic guiding loop is made of the segmental arc of two sections same radiuses, concentric, is respectively 1/4 segmental arc and 3/4 segmental arc, and corresponding magnetic induction part is 2; Perhaps, described magnetic guiding loop is made of three sections segmental arcs with radius, is respectively 1/3 segmental arc, and corresponding magnetic induction part is 3; Perhaps, described magnetic guiding loop is made of four sections segmental arcs with radius, is respectively 1/4 segmental arc, and corresponding magnetic induction part is 4; Perhaps, described magnetic guiding loop is made of six sections segmental arcs with radius, is respectively 1/6 segmental arc, and corresponding magnetic induction part is 6.

7. multi-section servo submersible motor as claimed in claim 6 is characterized in that, the segmental arc end of described magnetic guiding loop is provided with chamfering; Described chamfering for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.

8. multi-section servo submersible motor as claimed in claim 6 is characterized in that, also comprises skeleton, is used for fixing described magnetic guiding loop; Described magnetic guiding loop is arranged on the skeleton forming mould, when described skeleton is one-body molded and skeletal fixation together.

9. multi-section servo submersible motor as claimed in claim 5 is characterized in that described position-detection sensor comprises signal processing apparatus, and this signal processing apparatus comprises:

The A/D modular converter, the voltage signal that magnetic induction part in the position-detection sensor is sent carries out the A/D conversion, is digital signal with analog signal conversion;

Synthesis module, a plurality of voltage signals that the process A/D that position-detection sensor is sent changes are handled and are obtained reference signal D;

The angle acquisition module according to this reference signal D, selects the angle relative with it as deviation angle θ in the standard angle kilsyth basalt; And

Memory module is used for storage standards angle table and revises tables of data.

10. multi-section servo submersible motor as claimed in claim 9, it is characterized in that, described signal processing apparatus also comprises temperature compensation module, is arranged between A/D modular converter and the synthesis module, is used to eliminate the influence of the voltage signal that temperature sends position-detection sensor; The output signal of described synthesis module also comprises signal R; Described temperature compensation module comprises coefficient rectification module and multiplier, and described coefficient rectification module is to the signal R of the output of described synthesis module with to the signal R under should the standard state of signal ₀Compare and obtain output signal K; Described multiplier is a plurality of, and the voltage signal that each described multiplier will send from position-detection sensor, that process A/D changes and the output signal K of described coefficient rectification module multiply each other, and the result after will multiplying each other exports to synthesis module.

11. multi-section servo submersible motor as claimed in claim 10, it is characterized in that, also comprise difference block before the described temperature compensation module, when a voltage signal that sends when position-detection sensor is 2 or 3 multiple, be used to suppress temperature and null offset, and improve data precision.

12. multi-section servo submersible motor as claimed in claim 4 is characterized in that, described position-detection sensor mainly comprises sensor body, stainless steel cage, sealing device and shell,

Sensor body comprises rotor, and described rotor comprises first magnetic steel ring, second magnetic steel ring,

Wherein, described first magnetic steel ring and second magnetic steel ring are separately fixed on the motor shaft, be arranged in the inner chamber of stainless steel cage, corresponding to second magnetic steel ring, with the center of second magnetic steel ring is that the same circumference in the center of circle is provided with n (n=1,2 ... n) individual equally distributed magnetic induction part, the magnetic pole magnetization of described second magnetic steel ring make n magnetic induction part output be the Gray code form in proper order, and adjacent two outputs have only a variation;

On stainless steel cage, corresponding to first magnetic steel ring, with the center of first magnetic steel ring is that the same circumference in the center of circle is provided with the individual magnetic induction part that distributes at an angle of m (m is 2 or 3 integral multiple), the total logarithm of the magnetic pole of described first magnetic steel ring equates with the magnetic pole sum of second magnetic steel ring, and the polarity of two neighboring pole is opposite; Magnetic induction part is arranged on the outer wall of stainless steel cage;

Stainless steel cage outside is by sealing device and body seal and fixing;

When rotor during with respect to stator generation relative rotary motion, described magnetic induction part changes the magnetic signal that senses into voltage signal, and this voltage signal is exported to a signal processing apparatus.

13. multi-section servo submersible motor as claimed in claim 12 is characterized in that, on described stainless steel cage, corresponding to the angle between adjacent two magnetic induction parts of first magnetic steel ring, when m was 2 or 4, this angle was 90 °/g; When m was 3, this angle was 120 °/g; When m was 6, this angle was 60 °/g, and wherein, g is the magnetic pole sum of second magnetic steel ring.

14. multi-section servo submersible motor as claimed in claim 12 is characterized in that, the direct Surface Mount of described magnetic induction part is at the outer surface of stainless steel cage.

15. multi-section servo submersible motor as claimed in claim 12, it is characterized in that, described position-detection sensor also comprises two magnetic guiding loops, each described magnetic guiding loop is by a plurality of concentrics, constitutes with the segmental arc of radius, adjacent two segmental arcs leave the space, are located at respectively in this space corresponding to the magnetic induction part of two magnetic steel ring.

16. multi-section servo submersible motor as claimed in claim 15 is characterized in that, the segmental arc end of described magnetic guiding loop is provided with chamfering, for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.

17. multi-section servo submersible motor as claimed in claim 4 is characterized in that, described position-detection sensor mainly comprises sensor body, stainless steel cage, sealing device and shell,

Sensor body comprises rotor, and described rotor comprises first magnetic steel ring, second magnetic steel ring,

Wherein, described first magnetic steel ring and second magnetic steel ring are separately fixed in the rotating shaft, and described first magnetic steel ring is evenly geomagnetic into N[N＜=2 ⁿ(n=0,1,2 ... n)] to magnetic pole, and the polarity of two neighboring pole is opposite; The magnetic pole of described second magnetic steel ring adds up to N, and its magnetic order is determined according to the specific magnetic sequence algorithm;

On stainless steel cage,, be that the same circumference in the center of circle is provided with the individual magnetic induction part that distributes at an angle of m (m is 2 or 3 integral multiple) with the center of first magnetic steel ring corresponding to first magnetic steel ring; Corresponding to second magnetic steel ring, be that the same circumference in the center of circle is provided with n (n=0,1,2 with the center of second magnetic steel ring ... n) the individual magnetic induction part that distributes at an angle; Magnetic induction part is arranged on the outer wall of stainless steel cage;

Stainless steel cage outside is by sealing device and body seal and fixing;

When rotor during with respect to stator generation relative rotary motion, described magnetic induction part changes the magnetic signal that senses into voltage signal, and this voltage signal is exported to a signal processing apparatus.

18. multi-section servo submersible motor as claimed in claim 17 is characterized in that, on described stainless steel cage, is 360 °/N corresponding to the angle between adjacent two magnetic induction parts of second magnetic steel ring.

19. multi-section servo submersible motor as claimed in claim 17, it is characterized in that, on described stainless steel cage, corresponding to the angle between adjacent two magnetic induction parts of first magnetic steel ring, when m is 2 or 4, angle between every adjacent two magnetic induction parts is 90 °/N, and when m was 3, the angle between every adjacent two magnetic induction parts was 120 °/N; When m was 6, the angle between every adjacent two magnetic induction parts was 60 °/N.

20. multi-section servo submersible motor as claimed in claim 17 is characterized in that, the direct Surface Mount of described magnetic induction part is on the outer surface of stainless steel cage.

21. as claim 12 or 17 each described multi-section servo submersible motors, it is characterized in that, described position-detection sensor also comprises two magnetic guiding loops, each described magnetic guiding loop is by a plurality of concentrics, constitutes with the segmental arc of radius, adjacent two segmental arcs leave the space, are located at respectively in this space corresponding to the magnetic induction part of two magnetic steel ring.

22. multi-section servo submersible motor as claimed in claim 21 is characterized in that, the segmental arc end of described magnetic guiding loop is provided with chamfering, for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.

23. multi-section servo submersible motor as claimed in claim 17 is characterized in that, described position-detection sensor comprises signal processing apparatus, and this signal processing apparatus comprises:

The A/D modular converter, the voltage signal that position-detection sensor is sent carries out the A/D conversion, is digital signal with analog signal conversion;

Relativity shift angle θ ₁Computing module is used for the relative displacement θ of first voltage signal in the signal period of living in that the calculating location detecting sensor is sent corresponding to the magnetic induction part of first magnetic steel ring ₁

Absolute offset values θ ₂Computing module according to second voltage signal that sends corresponding to the magnetic induction part of second magnetic steel ring in the position-detection sensor, is determined the absolute offset values θ that put the residing signal period first place of first voltage signal by calculating ₂

Synthetic and the output module of angle is used for above-mentioned relative displacement θ ₁With absolute offset values θ ₂Addition, the anglec of rotation θ in this moment of the synthetic described first voltage signal representative;

Memory module is used to store data.

24. multi-section servo submersible motor according to claim 23 is characterized in that, described signal processing apparatus comprises:

The signal amplification module is used for before the A/D modular converter carries out the A/D conversion voltage signal that comes from position-detection sensor being amplified.

25. multi-section servo submersible motor according to claim 23 is characterized in that, described relativity shift angle θ ₁Computing module comprises first synthesis unit and the first angle acquiring unit, and described first synthesis unit is handled a plurality of voltage signals through the A/D conversion that position-detection sensor sends, and obtains a reference signal D; The described first angle acquiring unit is according to this reference signal D, selects an angle relative with it as deviation angle θ in the first standard standard angle kilsyth basalt ₁

26. multi-section servo submersible motor as claimed in claim 25 is characterized in that, described relativity shift angle θ ₁Computing module also comprises temperature compensation unit, is used to eliminate the influence of the voltage signal that temperature sends position-detection sensor.

27. multi-section servo submersible motor as claimed in claim 25 is characterized in that, the output of described first synthesis unit also comprises signal R.

28. the signal processing apparatus of position-detection sensor as claimed in claim 26, it is characterized in that, described temperature compensation unit comprises coefficient rectifier and multiplier, and described coefficient rectifier is to the signal R of the output of described synthesis module with to the signal R under should the standard state of signal ₀Compare and obtain output signal K; Described multiplier is a plurality of, and the voltage signal that each described multiplier will send from position-detection sensor, that process A/D changes and the output signal K of described coefficient rectification module multiply each other, and the result after will multiplying each other exports to first synthesis unit.

29. multi-section servo submersible motor according to claim 23 is characterized in that, described absolute offset values θ ₂Computing module comprises second synthesis unit and the second angle acquiring unit, and described second synthesis unit is used for second voltage signal that the position-detection sensor corresponding to second magnetic steel ring sends is synthesized, and obtains a signal E; The absolute offset values θ that the described second angle acquiring unit selects an angle relative with it to put as the residing signal period first place of first voltage signal in the second standard angle kilsyth basalt according to this signal E ₂

30., it is characterized in that described magnetic induction part is the hall sensing element as claim 5,12 or 17 each described multi-section servo submersible motors.

31. as claim 5,12 or 17 each described multi-section servo submersible motors, it is characterized in that, described sealing device comprises sealing device body and the lead that is located in wherein, the described stainless steel cage and the flange that is tightly connected, seal casinghousing are formed the sealing device body, the flange that is tightly connected links to each other with seal casinghousing, stainless steel cage is located between the two, is provided with first insulation barrier in the seal casinghousing, and first insulation barrier, stainless steel cage and seal casinghousing are enclosed to form seal cavity; Offer line outlet on first insulation barrier and the seal casinghousing respectively, lead penetrates the seal cavity of sealing device body from the flange that is tightly connected, and passes from line outlet; Be full of sealing filler in the seal cavity.

32. multi-section servo submersible motor as claimed in claim 31 is characterized in that, also is provided with second insulation barrier in the described seal cavity, offers line outlet on it; The quantity that is provided with of described second insulation barrier is more than one, and seal cavity is divided into multi-stage sealed space.

33. as claim 5,12 or 17 each described multi-section servo submersible motors, it is characterized in that, described sealing device comprises the sealing device body, the sealing device body is made up of adpting flange, seal casinghousing and described stainless steel cage, adpting flange links to each other with seal casinghousing, stainless steel cage is located between the two, the two ends of seal casinghousing inner chamber are respectively equipped with the sealing block and first insulation board, sealing block, first insulation board, stainless steel cage and seal casinghousing are enclosed to form seal cavity, are provided with compact heap between sealing block and the adpting flange; Offer through hole respectively on sealing block, first insulation board and the seal casinghousing, first copper rod penetrates the seal cavity of sealing device body from the through hole of seal casinghousing, passes from first insulation board; Be full of sealing filler in the seal cavity.

34. multi-section servo submersible motor according to claim 33 is characterized in that, described first copper rod is stepped, and setting step post external diameter in the middle is greater than the copper rod external diameter at two ends, and the leave from office terrace of this step post is replaced with first insulation board and contacted; The end of described first copper rod is provided with attachment plug.

35. multi-section servo submersible motor according to claim 33 is characterized in that, also is provided with second insulation board between described first insulation board and the sealing block, wears second copper rod in the seal cavity that second insulation board and sealing block enclose; First copper rod penetrates the seal cavity of sealing device body from the through hole of seal casinghousing, passes from first insulation board, and passes second insulation board and second copper rod is end to end; Second copper rod passes from the through hole of sealing block.

36. multi-section servo submersible motor according to claim 33 is characterized in that, also is provided with support plate between described first insulation board and second insulation board, offers through hole on it; The inner chamber of described seal casinghousing is provided with boss, and support plate is installed on the boss.

37. multi-section servo submersible motor according to claim 35 is characterized in that, the quantity that is provided with of described second insulation board and second copper rod is more than one, and seal cavity is divided into multi-stage sealed space.

38. multi-section servo submersible motor according to claim 35, it is characterized in that described second copper rod is stepped, an end is set to the step post, the cylinder external diameter is greater than the second copper rod external diameter of the other end, and the leave from office terrace of this step post is replaced with second insulation board and contacted; The end of described second copper rod is provided with attachment plug.

39. multi-section servo submersible motor according to claim 1 is characterized in that, described jockey is screwed flange or flange or two screwed flange.

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