CN109185017B - Generator front end component and rotating shaft - Google Patents

Generator front end component and rotating shaft Download PDF

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Publication number
CN109185017B
CN109185017B CN201811209477.5A CN201811209477A CN109185017B CN 109185017 B CN109185017 B CN 109185017B CN 201811209477 A CN201811209477 A CN 201811209477A CN 109185017 B CN109185017 B CN 109185017B
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CN
China
Prior art keywords
assembly
rotating shaft
flow channel
shaft body
rotor
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CN201811209477.5A
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Chinese (zh)
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CN109185017A (en
Inventor
杜建生
底青云
王自力
何新振
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Institute of Geology and Geophysics of CAS
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Institute of Geology and Geophysics of CAS
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Priority to CN201811209477.5A priority Critical patent/CN109185017B/en
Publication of CN109185017A publication Critical patent/CN109185017A/en
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Publication of CN109185017B publication Critical patent/CN109185017B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/006—Sealing arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/124—Sealing of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/60—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/20—Heat transfer, e.g. cooling
    • F05B2260/232—Heat transfer, e.g. cooling characterised by the cooling medium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hydraulic Turbines (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a front end component of a generator and a rotating shaft, wherein the front end component comprises a shell; the rotating shaft supporting seat is fixedly arranged in the shell; the rotating shaft comprises a shaft body, the shaft body is arranged in the rotating shaft supporting seat, one end of the rotating shaft supporting seat is provided with a dynamic sealing assembly, the dynamic sealing assembly is fixedly connected with the rotating shaft supporting seat through a supporting assembly, and a first cavity is formed between the outer peripheral wall of the shaft body and the inner peripheral wall of the dynamic sealing assembly; the one end of axis body and dynamic seal subassembly assembly is installed there is the impeller rotor, and this end is equipped with first runner along the axial, still is equipped with the second runner on the axis body to and the third runner, circulation impeller fixed mounting be in on the axis body. The pivot includes the axis body, and the one end of axis body is equipped with first runner along the axial, still is equipped with second runner and the third runner with first runner intercommunication on the axis body. The invention can effectively solve the heat dissipation problem at the front end of the rotating shaft and effectively prevent the sand jam.

Description

Generator front end component and rotating shaft
Technical Field
The invention relates to a front end assembly of a generator and a rotating shaft, in particular to a front end assembly of a generator for underground rotating machinery and a rotating shaft.
Background
In the prior art, a conventional dynamic seal assembly for an underground generator is hidden in a narrow space formed by a rotating shaft and a casing. In the space, slurry fluid is static fluid, heat generated by high-speed rotation of the dynamic seal assembly cannot be efficiently led out, and the sealing element, particularly the rubber sealing element, is quick in aging and low in service life under the condition.
Meanwhile, the dynamic sealing assembly is hidden in a narrow space formed by the rotating shaft and the casing and is of a cup-shaped structure, so that sand is easy to accumulate under the condition of the drilling fluid containing sand underground. When the accumulated sand is too much, the sand clamp of the rotating shaft can not rotate or the sealing failure of the dynamic sealing assembly is easily caused. Causing the failure of the downhole generator system and causing significant losses.
Disclosure of Invention
The invention aims to provide a front end assembly of a generator, which aims to solve the defects in the prior art, can effectively solve the problem that heat between a rotating shaft and a dynamic sealing assembly cannot be led out, prolongs the service life of the dynamic sealing assembly, and can effectively solve the problem of sand blockage.
Another object of the present invention is to provide a rotating shaft, which solves the disadvantages of the prior art, and can effectively improve the heat dissipation capability, and prevent the heat in the internal space of the generator from being too concentrated, which affects the service life of the generator.
The invention provides a generator front end assembly, comprising,
a housing;
the rotating shaft supporting seat is fixedly arranged in the shell;
the rotating shaft comprises a shaft body, the shaft body is rotatably arranged in the rotating shaft supporting seat, one end of the shaft body is provided with a dynamic sealing assembly, the dynamic sealing assembly is fixedly connected with the rotating shaft supporting seat through a supporting assembly, and a first cavity is formed between the outer peripheral wall of the shaft body and the inner peripheral wall of the dynamic sealing assembly; an impeller rotor is installed at one end, assembled with the dynamic sealing assembly, of the shaft body, a first flow channel is axially arranged at the end, a second flow channel used for communicating the inner cavity of the shell with the first flow channel and a third flow channel used for communicating the first cavity with the first flow channel are further arranged on the shaft body;
and the circulating impeller is fixedly arranged on the shaft body and is positioned at the same end as the impeller rotor.
In the front end module of the generator, preferably, a liquid outlet of the second flow channel is communicated with the first flow channel, a liquid inlet of the second flow channel is located on an outer peripheral wall of the shaft body, and the liquid inlet is located between the impeller rotor and the dynamic seal module.
In the front end assembly of the generator, preferably, the second flow channel is arranged along a radial direction of the shaft body and perpendicular to the first flow channel, and a liquid inlet of the second flow channel is provided with a sand control net.
In the aforementioned front end assembly of the generator, preferably, one end of the first flow passage near the impeller rotor is a front end, the other end of the first flow passage is a tail end, one end of the third flow passage is communicated with the tail end, and the other end of the third flow passage extends in a direction near the impeller rotor and is finally communicated with the first chamber.
In the front end assembly of the generator, preferably, the rotating shaft supporting seat includes a supporting seat installation portion and a rotating shaft installation portion, an outer diameter of the supporting seat installation portion is greater than an outer diameter of the rotating shaft installation portion, a liquid flow channel is formed on the supporting seat installation portion, and an outer peripheral wall of the supporting seat installation portion is attached to an inner peripheral wall of the housing and is fixedly connected with the inner peripheral wall;
the inner cavity of the rotating shaft mounting part is divided into a rotating shaft mounting cavity and a sealing component mounting cavity, a rolling bearing is mounted in the rotating shaft mounting cavity, one end of the shaft body, far away from the impeller rotor, is connected with the rolling bearing, and the dynamic sealing component is fixedly mounted in the sealing component mounting cavity through the supporting component;
the pivot installation department is close to impeller rotor's one end is formed with a plurality of drain holes, the drain hole is followed the circumference of pivot installation department is equidistant to be arranged.
In the front end assembly of the generator, preferably, the dynamic seal assembly includes a driving sleeve, a spring pad, a dynamic seal rotor and a dynamic seal stator, the driving sleeve is sleeved on the shaft body and is fixedly connected with the shaft body, the dynamic seal rotor is in plug-in fit with the driving sleeve, and the driving sleeve has a sliding degree of freedom in an axial direction relative to the dynamic seal rotor and has zero degree of freedom in a circumferential direction;
the spring pad is sleeved in the driving sleeve and is abutted with the dynamic seal rotor;
the dynamic seal stator is in inserted fit with the dynamic seal rotor and is fixedly connected with the support assembly;
and a gap is formed between the inner peripheral wall of the dynamic seal rotor and the dynamic seal stator and the outer peripheral wall of the shaft body, and the gap is the first cavity.
In the aforementioned front end assembly of a generator, preferably, the support assembly includes a support seat body and a stator fixing seat, the support seat body is fixedly installed in the seal assembly installation cavity, the stator fixing seat is fixedly connected with one end of the support seat body facing the impeller rotor, and the dynamic seal stator is fixedly installed in the stator fixing seat.
In the aforementioned front end assembly of the generator, preferably, the stator fixing seat includes a first mounting portion and a second mounting portion, where the second mounting portion is located near the impeller rotor, and the shaft body is further provided with a circulating impeller, and the circulating impeller is located in the second mounting portion.
A rotating shaft comprises a shaft body, wherein a first flow passage is axially arranged at one end of the shaft body, and a second flow passage and a third flow passage which are communicated with the first flow passage are also arranged on the shaft body;
and the inlet channel is arranged close to the inlet end of the first flow channel in the second flow channel and the third flow channel, and the other one is an outlet channel.
In the front end module of the generator, preferably, the openings of the second flow passage and the third flow passage are located on the peripheral wall of the shaft body;
the second flow passage is arranged in the radial direction of the shaft body, and is perpendicular to the first flow passage; the third flow channel is obliquely arranged and forms an included angle with the first flow channel;
and the openings of the second runner and/or the third runner are/is provided with a sand control net.
Compared with the prior art, the invention provides the novel generator front end assembly, the first flow passage, the second flow passage and the third flow passage are designed on the rotating shaft of the front end assembly, the slurry fluid in the first cavity can be communicated with the external slurry fluid in a circulating way through the design of the three flow passages, the heat exchange efficiency is greatly improved, the heat is prevented from being accumulated in the first cavity, the service life of the dynamic sealing assembly is ensured, and the first cavity is prevented from being clamped with the silt due to good circulation, so that the problem of sand blocking is effectively prevented.
In addition, the invention also provides a rotating shaft, the structural design of the rotating shaft can be applied to various motors, and the first flow channel, the second flow channel and the third flow channel which are designed on the rotating shaft can effectively disperse heat at the end part of the rotating shaft, prevent the problem of accelerated aging of the end part structure caused by the accumulation of heat at the end part and effectively prolong the service life of various motors.
Drawings
FIG. 1 is a half sectional view of a front end assembly of a generator of the present invention;
FIG. 2 is an isometric view of a shaft body;
FIG. 3 is a half sectional view of the shaft body;
FIG. 4 is an isometric view of a sand control screen;
FIG. 5 is a half sectional view of the generator front end assembly with the impeller stator assembly, impeller stator;
FIG. 6 is an isometric view of the spindle bearing;
FIG. 7 is an isometric view of the dynamic seal assembly in an assembled state.
Description of reference numerals: 1-shell, 2-rotating shaft support seat, 3-dynamic sealing component, 4-shaft body, 5-liquid flow channel, 6-support component, 7-first chamber, 8-impeller rotor, 9-first flow channel, 10-second flow channel, 11-third flow channel, 12-sand control net, 13-support seat installation part, 14-rotating shaft installation part, 15-rolling bearing, 16-driving sleeve, 17-spring pad, 18-dynamic sealing rotor, 19-dynamic sealing stator, 20-support seat body, 21-stator fixing seat, 22-circulating impeller, 23-annular groove, 24-through hole, 27-impeller, 28-impeller stator component, 30-claw, 31-guide groove and 32-liquid guide hole.
Detailed Description
The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The embodiment of the invention comprises the following steps: as shown in fig. 1, a front end assembly of a generator comprises a housing 1, wherein the housing 1 is of a cylindrical structure with two open ends;
the rotating shaft supporting seat 2 is fixedly arranged in the shell 1, the rotating shaft supporting seat and the shell are preferably fixedly connected through screws, and a sealing ring is arranged on the connecting surface of the rotating shaft supporting seat 2 and the shell 1 to prevent the contact surface of the rotating shaft supporting seat and the shell from being corroded;
the rotating shaft comprises a shaft body 4, the shaft body 4 is rotatably arranged in the rotating shaft supporting seat 2, one end of the shaft body 4 is provided with a dynamic sealing assembly 3, the dynamic sealing assembly 3 is fixedly connected with the rotating shaft supporting seat 2 through a supporting assembly 6, and a first cavity 7 is formed between the outer peripheral wall of the shaft body 4 and the inner peripheral wall of the dynamic sealing assembly 3; an impeller rotor 8 is arranged at one end of the shaft body 4 assembled with the dynamic sealing assembly 3, a first flow passage 9 is axially arranged at the end of the shaft body 4, a second flow passage 10 used for communicating the inner cavity of the shell 1 with the first flow passage 9 is further arranged on the shaft body 4, and a third flow passage 11 used for communicating the first chamber 7 with the first flow passage 9 is further arranged on the shaft body 4.
It should be noted that the present invention is a front end assembly of a generator, when fluid flows through the present invention, the impeller rotor 8 is driven to rotate, the impeller rotor 8 drives the shaft body 4 to rotate, and the shaft body 4 rotates and simultaneously drives the rotor of the generator to rotate to generate electricity.
Because many devices need to use the generator, under certain working conditions, the working environment of the generator is severe, such as drilling operation, when the invention is applied to a drilling tool, the fluid is slurry which contains a large amount of sand and stone, and in the front end component of the downhole generator in the prior art, heat at the sealing component part can not be released frequently, the sealing component is rapidly aged and damaged, and even sand blocking occurs. According to the invention, the circulating impeller 22 is arranged at one end of the shaft body 4 close to the impeller rotor 8, and the first flow channel 9, the second flow channel 10 and the third flow channel 11 are arranged on the shaft body 4 of the rotating shaft, so that an effective circulation is formed by an inner cavity of the shell 1, the second flow channel 10, the first flow channel 9, the third flow channel 11, the first cavity 7 and an inner cavity of the shell 1, and heat in the first cavity 7 can be circulated into the inner cavity of the shell 1 in time, thereby ensuring the service life of the dynamic sealing component 3. Because the mud in the first cavity 7 is constantly discharged, the grit can not get into this space, has also effectively solved the sand card problem, guarantees the normal work of generator.
In a preferred scheme, as shown in fig. 2 and 3, the liquid outlet of the second flow passage 10 is communicated with the first flow passage 9, the liquid inlet of the second flow passage 10 is positioned on the peripheral wall of the shaft body 4, and the liquid inlet is positioned in the area between the impeller rotor 8 and the dynamic seal assembly 3. The second flow passage 10 is arranged along the radial direction of the shaft body 4 and is vertical to the first flow passage 9, and a sand control net 12 is arranged on a liquid inlet of the second flow passage 10.
Set up the region between impeller rotor 8 and dynamic seal subassembly 3 with the inlet, can make mud smoothly get into in second runner 10 behind the impeller rotor 8, sand control net 12 can prevent that large granule impurity from getting into in second runner 10 to avoid taking place to block up, the quantity of second runner 10 can be 1 also can be a plurality of, the preferred design of this embodiment is 2, 2 second runners 10 set up relatively, the axis of the two is on same straight line promptly, the manufacturing of being convenient for on the one hand of this kind of design, on the other hand can form the convection current, make mud can get into in first runner 9 well.
As shown in fig. 4, the sand control net 12 is preferably a circular ring structure, through holes 24 are uniformly distributed on the circular ring structure, correspondingly, the shaft body 4 is provided with an annular groove 23 for installing the sand control net 12, and the sand control net 12 is clamped in the annular groove 23. It should be noted that this assembly is only a preferred embodiment, and other embodiments are within the scope of the present invention, such as designing the sand control net 12 to be circular so that it covers the opening of the second flow channel 10.
Further, one end of the first flow channel 9 close to the impeller rotor 8 is a front end, the other end is a tail end, one end of the third flow channel 11 is communicated with the tail end, and the other end of the third flow channel 11 extends towards the direction close to the impeller rotor 8 and is finally communicated with the first chamber 7.
In order to improve the circulation effect, the third flow channel 11 is preferably designed as a straight flow channel, the included angle between the axis of the straight flow channel and the axis of the first flow channel 9 is 30-50 degrees, preferably 40 degrees, and the included angle can be used for ensuring that the slurry has impact force towards the direction of the impeller rotor 8 when entering the first flow channel 9 from the third flow channel 11, so that the circulation effect is better.
In order that those skilled in the art will better understand the present invention, the present invention will be described in further detail below in connection with a complete downhole generator assembly.
The complete downhole generator device further comprises a generator assembly, a communication line assembly and an impeller stator assembly 27, wherein the generator assembly is connected with the casing 1, a generator rotor of the generator assembly is meshed with the rotating shaft through a gear, please refer to fig. 5, the impeller stator assembly 27 is fixedly mounted in the casing 1 through a stator supporting device, wherein an impeller stator 28 is arranged close to the impeller rotor 8, and the communication line assembly is fixedly mounted on the stator supporting device. The generator assembly, the communication line assembly, the impeller stator assembly 27 and the stator support device all adopt the prior art scheme, and the structural features of the generator assembly, the communication line assembly, the impeller stator assembly 27 and the stator support device are not described again.
Please refer to fig. 6, the rotating shaft supporting seat 2 includes a supporting seat mounting portion 13 and a rotating shaft mounting portion 14, which are integrated, an outer diameter of the supporting seat mounting portion 13 is larger than an outer diameter of the rotating shaft mounting portion 14, the supporting seat mounting portion 13 is located in a middle portion of an outer peripheral wall of the rotating shaft mounting portion 14, a liquid flow channel 5 is formed on the supporting seat mounting portion 13 for slurry to pass through, the outer peripheral wall of the supporting seat mounting portion 13 is attached to an inner peripheral wall of the casing 1, a plurality of sealing rings are disposed on the outer peripheral wall of the supporting seat mounting portion 13, and when the supporting seat mounting portion 13 is mounted in.
Further, the inner chamber of pivot installation department 14 is divided into pivot installation cavity and seal assembly installation cavity, installs antifriction bearing 15 in the pivot installation cavity, and the one end that impeller rotor 8 was kept away from to axis body 4 is connected with antifriction bearing 15, and dynamic seal subassembly 3 passes through 6 fixed mounting of supporting component in the seal assembly installation cavity.
The end of the shaft mounting part 14 close to the impeller rotor 8 is formed with a plurality of liquid guiding holes 32, the liquid guiding holes 32 are arranged at equal intervals along the circumferential direction of the shaft mounting part 14, and preferably, the liquid guiding holes 32 are arranged obliquely, and the oblique direction is the direction facing the liquid flow channel 5. The liquid guide hole 32 can enable a part of mud to pass through the liquid guide hole and directly enter the liquid flow channel 5, and the circulation effect is improved.
As shown in fig. 7, the dynamic seal assembly 3 includes a driving sleeve 16, a spring pad 17, a dynamic seal rotor 18 and a dynamic seal stator 19, wherein the spring pad 17 is sleeved in the driving sleeve 16 and abuts against the dynamic seal rotor 18; the driving sleeve 16 is sleeved on the shaft body 4 and fixedly connected with the shaft body 4 through a screw, the movable sealing rotor 18 is matched with the driving sleeve 16 in an inserted manner, a clamping jaw 30 is arranged at one end, connected with the movable sealing rotor 18, of the driving sleeve 16, a guide groove 31 is formed in the outer peripheral wall of the movable sealing rotor 18 along the axial direction, when the movable sealing rotor 18 and the driving sleeve 16 are assembled together, the clamping jaw 30 is clamped in the guide groove 31, the movable sealing rotor 18 has a sliding freedom degree relative to the driving sleeve 16 in the axial direction, the rotating freedom degree in the circumferential direction is zero, in order to improve the sealing effect, a rubber sealing ring is arranged on the inner wall of the movable sealing rotor 18, and the position of the rubber sealing ring is the end part of the first;
the dynamic seal stator 19 is in plug fit with the dynamic seal rotor 18, the dynamic seal stator 19 is fixedly connected with the support component 6, and a rubber seal ring is arranged between the outer wall of the dynamic seal stator 19 and the inner wall of the support component 6; a clearance is provided between the inner peripheral walls of the dynamic seal rotor 18 and the dynamic seal stator 19 and the outer peripheral wall of the shaft body 4, and the clearance is the first chamber 7.
In a state where the shaft body 4 rotates at a high speed, the drive sleeve 16 and the dynamic seal rotor 18 rotate synchronously with the shaft body 4, while the dynamic seal stator 19 remains stationary.
As shown in fig. 5, the supporting assembly 6 includes a supporting seat body 20 and a stator fixing seat 21, the supporting seat body 20 is fixedly installed in the sealing assembly installation cavity, the stator fixing seat 21 and one end of the supporting seat body 20 facing the impeller rotor 8 are fixedly connected, and the dynamic sealing stator 19 is fixedly installed in the stator fixing seat 21 through screws. The main function of the support assembly 6 is to fix the dynamic seal stator 19.
The stator fixing seat 21 includes a first mounting portion and a second mounting portion, wherein the second mounting portion is close to the impeller rotor 8, the shaft body 4 is further provided with a circulating impeller 22, and the circulating impeller 22 is located in the second mounting portion.
The arrangement of the circulating impeller 22 is to improve the circulating speed of the slurry, form a working mode of internal pumping and external discharging, and the circulating impeller 22 can effectively pump out the slurry in the first chamber 7, so that the heat dissipation speed is improved.
During normal operation, mud enters the second runner 10 through the sand control net 12, then enters the first runner 9, finally just flows into the first chamber 7 from the third runner 11, and under the action of the circulating impeller 22, the mud with heat in the first chamber 7 is discharged out of the first chamber 7 and enters the shell 1.
Referring to fig. 2 to 4, the rotating shaft includes a shaft body 4, a first flow channel 9 is axially disposed at one end of the shaft body 4, and a second flow channel 10 and a third flow channel 11 communicated with the first flow channel 9 are further disposed on the shaft body 4; the inlet end of the second flow channel 10 and the inlet end of the third flow channel 11 close to the first flow channel 9 are inlet flow channels, and the other one is an outlet flow channel.
Preferably, the openings of the second flow passage 10 and the third flow passage 11 are both located on the outer peripheral wall of the shaft body 4; the second flow passage 10 is arranged along the radial direction of the shaft body 4, and is perpendicular to the first flow passage 9; the third flow channel 11 is obliquely arranged and forms an included angle with the first flow channel 9; the openings of the second runner 10 and/or the third runner 11 are provided with sand control nets 12.
The rotating shaft can be applied to various generators driven by fluid, can effectively solve the problem of heat dissipation of the dynamic sealing assembly, and prolongs the service life.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.

Claims (8)

1. A generator front end assembly, characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a housing (1);
the rotating shaft supporting seat (2) is fixedly arranged in the shell (1);
the rotating shaft comprises a shaft body (4), the shaft body (4) is rotatably installed in the rotating shaft supporting seat (2), a dynamic sealing assembly (3) is installed at one end of the shaft body (4), the dynamic sealing assembly (3) is fixedly connected with the rotating shaft supporting seat (2) through a supporting assembly (6), and a first cavity (7) is formed between the outer peripheral wall of the shaft body (4) and the inner peripheral wall of the dynamic sealing assembly (3); an impeller rotor (8) is arranged at one end of the shaft body (4) assembled with the dynamic sealing assembly (3), a first flow channel (9) is axially arranged at the end of the shaft body, a second flow channel (10) used for communicating the inner cavity of the shell (1) with the first flow channel (9) and a third flow channel (11) used for communicating the first cavity (7) with the first flow channel (9) are further arranged on the shaft body (4);
and the circulating impeller (22) is fixedly arranged on the shaft body (4) and is positioned at the same end with the impeller rotor (8).
2. The generator front end assembly of claim 1, wherein: the liquid outlet of the second runner (10) is communicated with the first runner (9), the liquid inlet of the second runner (10) is located on the peripheral wall of the shaft body (4), and the liquid inlet is located between the impeller rotor (8) and the dynamic sealing assembly (3).
3. The generator front end assembly according to claim 1 or 2, characterized in that: the second flow channel (10) is arranged along the radial direction of the shaft body (4) and is perpendicular to the first flow channel (9), and a sand control net (12) is arranged on a liquid inlet of the second flow channel (10).
4. The generator front end assembly of claim 1, wherein: one end, close to the impeller rotor (8), of the first flow channel (9) is a front end, the other end of the first flow channel is a tail end, one end of the third flow channel (11) is communicated with the tail end, and the other end of the third flow channel (11) extends towards the direction close to the impeller rotor (8) and is finally communicated with the first cavity (7).
5. The generator front end assembly of claim 1, wherein: the rotating shaft supporting seat (2) comprises a supporting seat mounting part (13) and a rotating shaft mounting part (14), the outer diameter of the supporting seat mounting part (13) is larger than that of the rotating shaft mounting part (14), a liquid flow channel (5) is formed on the supporting seat mounting part (13), the outer peripheral wall of the supporting seat mounting part (13) is attached to the inner peripheral wall of the shell (1), and the supporting seat mounting part and the shell are fixedly connected;
the inner cavity of the rotating shaft mounting part (14) is divided into a rotating shaft mounting cavity and a sealing component mounting cavity, a rolling bearing (15) is mounted in the rotating shaft mounting cavity, one end, far away from the impeller rotor (8), of the shaft body (4) is connected with the rolling bearing (15), and the dynamic sealing component (3) is fixedly mounted in the sealing component mounting cavity through the supporting component (6);
the utility model discloses a turbine impeller structure, including pivot installation department (14) and impeller rotor (8), one end that pivot installation department (14) are close to impeller rotor (8) is formed with a plurality of drain holes (32), drain hole (32) are followed the circumference of pivot installation department (14) is equidistant to be arranged.
6. The generator front end assembly of claim 5, wherein: the dynamic sealing assembly (3) comprises a driving sleeve (16), a spring pad (17), a dynamic sealing rotor (18) and a dynamic sealing stator (19), the driving sleeve (16) is sleeved on the shaft body (4) and is fixedly connected with the shaft body (4), the dynamic sealing rotor (18) is in plug-in fit with the driving sleeve (16), the driving sleeve (16) has a sliding degree of freedom in the axial direction relative to the dynamic sealing rotor (18), and the rotating degree of freedom in the circumferential direction is zero;
the spring pad (17) is sleeved in the driving sleeve (16) and is abutted with the dynamic seal rotor (18);
the dynamic seal stator (19) is in plug fit with the dynamic seal rotor (18), and the dynamic seal stator (19) is fixedly connected with the support component (6);
and a gap is reserved between the inner peripheral walls of the dynamic seal rotor (18) and the dynamic seal stator (19) and the outer peripheral wall of the shaft body (4), and the gap is the first cavity (7).
7. The generator front end assembly of claim 6, wherein: the supporting assembly (6) comprises a supporting seat body (20) and a stator fixing seat (21), the supporting seat body (20) is fixedly installed in the sealing assembly installation cavity, the stator fixing seat (21) faces towards one end of the impeller rotor (8) and is fixedly connected with the supporting seat body (20), and the dynamic sealing stator (19) is fixedly installed in the stator fixing seat (21).
8. The generator front end assembly of claim 7, wherein: the stator fixing seat (21) comprises a first mounting part and a second mounting part, wherein the second mounting part is close to the impeller rotor (8), and the circulating impeller (22) is positioned in the second mounting part.
CN201811209477.5A 2018-10-17 2018-10-17 Generator front end component and rotating shaft Active CN109185017B (en)

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CN109185017B true CN109185017B (en) 2020-09-29

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE528898C (en) * 1929-02-06 1931-07-04 Jenny Elfriede Loeffler Geb Bo Cooling of rotating waves
CN2835666Y (en) * 2005-11-13 2006-11-08 王加华 Zero leakage technology for pump
US7988409B2 (en) * 2006-02-17 2011-08-02 Schlumberger Technology Corporation Method and apparatus for extending flow range of a downhole turbine
CN202417959U (en) * 2011-12-26 2012-09-05 大连环友屏蔽泵有限公司 Non-clogging shield pump
CN202545098U (en) * 2012-03-19 2012-11-21 中国石油天然气集团公司 Downhole turbine generator system
CN108252921B (en) * 2016-12-28 2024-03-15 上海佰诺泵阀有限公司 Internal circulation structure of magnetic pump

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