CN109412310B - Cylinder type oil-submersible linear motor protector - Google Patents
Cylinder type oil-submersible linear motor protector Download PDFInfo
- Publication number
- CN109412310B CN109412310B CN201811198069.4A CN201811198069A CN109412310B CN 109412310 B CN109412310 B CN 109412310B CN 201811198069 A CN201811198069 A CN 201811198069A CN 109412310 B CN109412310 B CN 109412310B
- Authority
- CN
- China
- Prior art keywords
- pipe
- adapter
- protector
- cavity
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
-
- 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
- H02K5/132—Submersible electric motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The cylindrical submersible linear motor protector comprises a stator adapter (1), an outer protective pipe (2), a metal bag unit (3), a middle adapter (4), a lower adapter (6) and an inner protective pipe (7); the method has the following specific advantages: 1) the protector is arranged on the side of the motor stator, the expansion and contraction frequency of the metal bag of the protector is irrelevant to the motion frequency of the motor rotor, and the protector is in a creeping state only and has long service life; 2) the protector is composed of a main set and an auxiliary set, and an oil isolating ring is used for assisting in further prolonging the service life of the system; 3) the protector self-forming system can pre-charge oil, and solves the problem that the traditional linear submersible motor system needs to integrate the linear submersible motor and the protector and then charge the oil uniformly.
Description
The technical field is as follows: the invention belongs to a sealing protection device of an underground submersible motor, and particularly relates to a cylindrical submersible linear motor protector.
Background art: the linear reciprocating oil-submersible pump is an important underground crude oil mechanical production equipment, mainly including cylinder type oil-submersible linear motor, sealing protector and plunger pump. The purpose of the sealing protector is to balance the internal and external pressure of the cylinder type linear motor cavity, compensate the expansion or contraction of the motor oil in the motor cavity caused by the temperature change through the self expansion or contraction, isolate the motor oil and well fluid in the motor cavity, ensure the insulation of the motor winding and further ensure the safe operation of the linear reciprocating submersible pump. Publication No. CN 104319932A proposes a hose type electric submersible linear motor breathing protector, the mover of the motor is also sealed in the protector, and the protector expands and contracts at high frequency due to the high-frequency reciprocating motion of the motor mover, so that the service life of the linear reciprocating submersible pump is greatly shortened. If the cylindrical submersible linear motor protector which is not influenced by the motion of the rotor can be invented, the service life of the motor is inevitably prolonged, and reports are not found at present.
The invention content is as follows:
the purpose of the invention is as follows: the protector is connected with a motor stator, balances the pressure inside and outside the inner cavity of the cylinder type linear motor stator, compensates the expansion and contraction of motor oil in the inner cavity of the motor stator, isolates the motor oil and well fluid in the inner cavity of the motor stator, and solves the problems that the pressure resistance of the cylinder type submersible linear motor is not high or the short service life of the existing submersible linear motor protector is not enough.
The technical scheme is as follows: the invention is realized by the following technical scheme:
the utility model provides a oily linear electric motor protector of drum formula dives which characterized in that: the protector comprises a stator adapter (1), an outer protective pipe (2), a metal bag unit (3), a middle adapter (4), a lower adapter (6) and an inner protective pipe (7); the inner protecting pipe (7) is arranged in the outer protecting pipe (2) to form a group of protecting pipes, and a gap is reserved between the inner protecting pipe (7) and the outer protecting pipe (2) to be used as a cavity; the protective pipes are divided into two groups, namely an upper protective pipe and a lower protective pipe, the upper protective pipe and the lower protective pipe are connected through a middle adapter (4), the upper end of the upper protective pipe is connected with the stator adapter (1), and the lower end of the lower protective pipe is connected with a lower adapter (6); (that is, the stator adapter (1) is connected with the upper end of the upper protective tube, the lower end of the upper protective tube is connected with the middle adapter (4), the middle adapter (4) is connected with the upper end of the lower protective tube, and the lower end of the lower protective tube is connected with the lower adapter (6)
The stator adapter (1), the outer protecting pipe (2) of the upper protecting pipe, the middle adapter (4) and the inner protecting pipe (7) of the upper protecting pipe are enclosed to form an upper cavity (9), and a metal bag unit (3) is arranged in the upper cavity (9) to form a main protector;
the middle adapter (4), the outer protecting pipe (2) of the lower protecting pipe, the lower adapter (6) and the inner protecting pipe (7) of the lower protecting pipe are enclosed to form a lower cavity (10), and the oil-isolating ring (5) and the other metal bag unit (3) are arranged in the lower cavity (10) to form an auxiliary protector;
the upper cavity (9) is communicated with the lower cavity (10) through an intermediate oil duct (15) in the intermediate adapter (4); the assembled motor protector (without motor oil injection) can bear the pressure of 0.5MPa for a long time, and the pressure relief phenomenon is avoided.
The lower end of the stator adapter (1) extends into a position between an outer protective pipe (2) of the upper protective pipe and an inner protective pipe (7) of the upper protective pipe, rubber sealing rings (8) are arranged between the stator adapter (1) and the outer protective pipe (2) of the upper protective pipe and between the stator adapter (1) and the inner protective pipe (7) of the upper protective pipe;
the upper end of the middle adapter (4) extends into a position between an outer protective pipe (2) of the upper protective pipe and an inner protective pipe (7) of the upper protective pipe, and rubber sealing rings (8) are arranged between the middle adapter (4) and the outer protective pipe (2) of the upper protective pipe and between the middle adapter (4) and the inner protective pipe (7) of the upper protective pipe; the lower end of the middle adapter (4) extends into a position between an outer protecting pipe (2) of the lower protecting pipe and an inner protecting pipe (7) of the lower protecting pipe, and rubber sealing rings (8) are arranged between the middle adapter (4) and the outer protecting pipe (2) of the lower protecting pipe and between the middle adapter (4) and the inner protecting pipe (7) of the lower protecting pipe;
the upper end of the lower rotary joint (6) extends into the space between the outer protecting pipe (2) of the lower protecting pipe and the inner protecting pipe (7) of the lower protecting pipe, and rubber sealing rings (8) are arranged between the lower rotary joint (6) and the outer protecting pipe (2) of the lower protecting pipe and between the lower rotary joint (6) and the inner protecting pipe (7) of the lower protecting pipe.
A gate valve (11) is mounted on the stator adapter (1), a motor side oil duct (12) is formed in the middle of the side wall of the stator adapter (1), the motor side oil duct (12) is connected with the upper cavity (9), the gate valve (11) for blocking and opening the motor side oil duct (12) is arranged on the motor side oil duct (12), the gate valve (11) is opened, the motor side oil duct (12) is communicated with the upper cavity (9), the gate valve (11) is closed, and the motor side oil duct (12) is closed with the upper cavity (9);
the gate valve (11) is a structure which is axially vertical to the axial direction of the motor side oil duct (12) and can rotate, an oil drain hole (13) is formed in the gate valve (11), the axial direction of the oil drain hole (13) is vertical to the axial direction of the gate valve (11), the position of the oil drain hole (13) corresponds to the position of the motor side oil duct (12), namely when the oil drain hole (13) in the gate valve (11) rotates to be aligned with the motor side oil duct (12) (the axial direction of the oil drain hole (13) is coincident with or parallel to the axial direction of the motor side oil duct (12)), the motor side oil duct (12) is communicated with the upper cavity (9), motor oil in the linear motor protector and motor oil in the cylindrical submersible linear motor stator mutually circulate, and when the oil drain hole (13) in the gate valve (11) rotates to be 90 degrees with the motor side oil duct (12), the circulation of the motor oil in the linear motor protector and the cylindrical linear motor protector (namely the axial direction of the oil drain hole (13) and the axial direction of the motor side oil duct (12) is The structure of the gate valve (11) is the same as the principle of a ball valve in the water supply field, and the description is omitted);
the metal bag unit (3) comprises a seat (20), an inner metal corrugated bag (21), an outer metal corrugated bag (22) and a base (23) (the inner metal corrugated bag (21) and the outer metal corrugated bag (22) are telescopic metal corrugated pipes), the inner metal corrugated bag (21) is arranged in the outer metal corrugated bag (22) (the inner metal corrugated bag (21) is sleeved outside the inner protective pipe (7)) and a bag inner cavity (17) of the corrugated bag is formed between the inner metal corrugated bag (21) and the outer metal corrugated bag (22); the upper ends of the inner metal corrugated bag (21) and the outer metal corrugated bag (22) are connected with the base (23), the lower ends of the inner metal corrugated bag (21) and the outer metal corrugated bag (22) are connected with the connecting seat (20), and the connecting seat (20) is provided with a liquid throughput hole (27) communicated with the bag inner cavity (17).
The base (23) is provided with the guide ball (24), and only the rolling guide ball (24) is arranged between the base (23) and the inner wall of the outer protective pipe (2) and between the base (23) and the outer wall of the inner protective pipe (7). The base (23) is ensured to move freely between the protective tube (7) and the outer protective tube (2), the base (23) is provided with a groove for accommodating a guide ball (24), and a base cover plate (25) is additionally arranged after the guide ball (24) is arranged, namely the guide ball (24) in the metal bag unit (3) is arranged between the base (23) and the base cover plate (25) and can roll freely, the number of the guide ball is 6-12, and the base (23) and the base cover plate (25) are fixed together by a bolt (26); the guide ball (24) freely rolls with the outer protective pipe (2) and the inner protective pipe (7) to play a role in guiding and reducing friction.
An oil separating ring (5) is arranged at the upper end of the metal bag unit (3) in the lower cavity (10), the oil separating ring (5) is composed of a ring body (28) and an oil scraper ring (29), the outer circle side wall and the inner circle side wall of the oil scraper ring (29) are respectively provided with the oil scraper ring (29), (namely, the oil scraper ring (29) is movably and hermetically arranged between the ring body (28) and the inner wall of the outer protecting pipe (2) and between the ring body (28) and the outer wall of the inner protecting pipe (7) and can axially move along the inner protecting pipe (7))
The ring body (28) is provided with a groove, and the oil scraper ring (29) is arranged in the groove of the ring body (28); after the metal bag unit (3) in the lower cavity (10) fails, the oil-isolating ring (5) becomes a barrier, and the failed protector is effectively isolated.
The middle adapter (4) is of a tubular structure, a linear sliding bearing (14) is arranged at the inner circle of the middle adapter (4), a middle oil duct (15) and a breathing hole (16) are formed in the middle of the side wall of the middle adapter (4) (the breathing hole (16) is communicated with the outside of the middle adapter (4)), and the breathing hole (16) is communicated with a bag inner cavity (17) of the metal bag unit (3) in the upper cavity (9) through a well fluid handling hole (27);
an oil filling valve (18) and an oil drain valve (19) are installed on the lower rotary joint (6), the oil filling valve (18) and the oil drain valve (19) are communicated with the lower cavity (10), and engine oil is filled into the lower cavity (10) and the upper cavity (9) of the protector through the oil filling valve (18), if the pressure in the upper cavity and the lower cavity of the protector is too high, pressure is released through oil drainage of the oil drain valve (19), the lower rotary joint (6) is also of a tubular structure, a linear sliding bearing (14) is also placed at the inner circle of the lower rotary joint (6), and a breathing hole (16) is also formed in the middle of the side wall of the lower rotary joint (6); the breathing hole (16) is communicated with a bag inner cavity (17) of the metal bag unit (3) in the lower cavity (10) through a well fluid throughput hole (27).
When the metal bag unit (3) is connected with the middle adapter (4) or the lower adapter (6), the well fluid handling hole (27) is communicated with the breathing hole (16) on the middle adapter (4) or the lower adapter (6) in an aligning way, so that the bag inner cavity (17) is ensured to be reliably communicated with the well fluid, and the internal pressure and the external pressure in the upper cavity (9) and the lower cavity (10) are balanced.
The stator adapter (1), the middle adapter (4) and the lower adapter (6) are made of non-magnetic materials, and can be made of 304 or 316L austenitic stainless steel materials, and the linear sliding bearing (14) is made of wear-resistant non-magnetic materials.
When the protector is used, under a normal working state, the upper cavity (9) and the lower cavity (10) of the protector are filled with motor oil, well liquid is filled in the inner cavity (17) of the capsule, and the motor oil and the well liquid are separated through the inner metal corrugated capsule (21), the outer metal corrugated capsule (22), the outer protecting pipe (2) and the inner protecting pipe (7); when the internal pressure of the motor and the protector is lower than the pressure of well liquid, the well liquid enters a well liquid throughput hole (27) of the metal bag unit (3) through a breathing hole (16) of the middle adapter (4) and a breathing hole (16) of the lower adapter (6) and then enters a bag inner cavity (17), the metal corrugated bag (21) and the outer metal corrugated bag (22) are stretched, and motor oil is compressed to offset the pressure of the well liquid; when motor oil in the motor and the protector expands, the pressure is higher than the well fluid pressure, the well fluid in the bag inner cavity (17) is discharged through the well fluid throughput hole (27) and the breathing hole (16), the metal corrugated bag (21) and the outer metal corrugated bag (22) contract, and the space between the upper cavity (9) and the lower cavity (10) is enlarged to accommodate the extra motor oil caused by expansion.
The advantages and effects are as follows:
compared with the prior art, the invention has the following specific advantages:
1) the protector is arranged on the side of the motor stator, the expansion and contraction frequency of the metal bag of the protector is irrelevant to the motion frequency of the motor rotor, and the protector is in a creeping state only and has long service life; 2) the protector is composed of a main set and an auxiliary set, and an oil isolating ring is used for assisting in further prolonging the service life of the system; 3) the protector self-forming system can pre-charge oil, and solves the problem that the traditional linear submersible motor system needs to integrate the linear submersible motor and the protector and then charge the oil uniformly.
Description of the drawings:
fig. 1 is a schematic structural diagram of a cylindrical submersible linear motor protector of the invention;
figure 2 is a three-dimensional cross-sectional view of a stator adapter of the present invention;
figure 3 is a three-dimensional cross-sectional view of the intermediate adapter of the present invention;
FIG. 4 is a three-dimensional cross-sectional view of a down-conversion joint of the present invention;
FIG. 5 is a three-dimensional cross-sectional view of a metal bladder unit of the present invention;
FIG. 6 is an exploded view of the base of the metal bladder unit of the present invention;
FIG. 7 is a three-dimensional view of an oil slinger of the present invention;
fig. 8 is a flow diagram of the protector inflation fluid flow of the present invention.
Description of reference numerals:
1. the oil-gas well pump comprises a stator adapter, 2 parts of an outer protection pipe, 3 parts of a metal bag unit, 4 parts of a middle adapter, 5 parts of an oil isolating ring, 6 parts of a lower adapter, 7 parts of an inner protection pipe, 8 parts of a rubber sealing ring, 9 parts of an upper cavity, 10 parts of a lower cavity, 11 parts of a gate valve, 12 parts of a motor side oil duct, 13 parts of an oil drainage hole, 14 parts of a linear sliding bearing, 15 parts of a middle oil duct, 16 parts of a breathing hole, 17 parts of a bag inner cavity, 18 parts of an oil injection valve, 19 parts of the oil drainage valve, 20 parts of a connecting seat, 21 parts of an inner metal corrugated bag, 22 parts of an outer metal corrugated bag, 23 parts of a base, 24 parts of a guide ball, 25 parts of a base cover plate, 26.
The specific implementation mode is as follows: the invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the invention relates to a cylindrical submersible linear motor protector, which comprises a stator adapter (1), an outer protective pipe (2), a metal bag unit (3), a middle adapter (4), a lower adapter (6) and an inner protective pipe (7); the inner protecting pipe (7) is arranged in the outer protecting pipe (2) to form a group of protecting pipes, and a gap is reserved between the inner protecting pipe (7) and the outer protecting pipe (2) to be used as a cavity; the protective pipes are divided into two groups, namely an upper protective pipe and a lower protective pipe, the upper protective pipe and the lower protective pipe are connected through a middle adapter (4), the upper end of the upper protective pipe is connected with the stator adapter (1), and the lower end of the lower protective pipe is connected with a lower adapter (6); (that is, the stator adapter (1) is connected with the upper end of the upper protective tube, the lower end of the upper protective tube is connected with the middle adapter (4), the middle adapter (4) is connected with the upper end of the lower protective tube, and the lower end of the lower protective tube is connected with the lower adapter (6)
The stator adapter (1), the outer protecting pipe (2) of the upper protecting pipe, the middle adapter (4) and the inner protecting pipe (7) of the upper protecting pipe are enclosed to form an upper cavity (9), and a metal bag unit (3) is arranged in the upper cavity (9) to form a main protector;
the middle adapter (4), the outer protecting pipe (2) of the lower protecting pipe, the lower adapter (6) and the inner protecting pipe (7) of the lower protecting pipe are enclosed to form a lower cavity (10), and the oil-isolating ring (5) and the other metal bag unit (3) are arranged in the lower cavity (10) to form an auxiliary protector;
the upper cavity (9) is communicated with the lower cavity (10) through an intermediate oil duct (15) in the intermediate adapter (4); the assembled motor protector (without motor oil injection) can bear the pressure of 0.5MPa for a long time, and the pressure relief phenomenon is avoided.
The lower end of the stator adapter (1) extends into a position between an outer protective pipe (2) of the upper protective pipe and an inner protective pipe (7) of the upper protective pipe, rubber sealing rings (8) are arranged between the stator adapter (1) and the outer protective pipe (2) of the upper protective pipe and between the stator adapter (1) and the inner protective pipe (7) of the upper protective pipe;
the upper end of the middle adapter (4) extends into a position between an outer protective pipe (2) of the upper protective pipe and an inner protective pipe (7) of the upper protective pipe, and rubber sealing rings (8) are arranged between the middle adapter (4) and the outer protective pipe (2) of the upper protective pipe and between the middle adapter (4) and the inner protective pipe (7) of the upper protective pipe; the lower end of the middle adapter (4) extends into a position between an outer protecting pipe (2) of the lower protecting pipe and an inner protecting pipe (7) of the lower protecting pipe, and rubber sealing rings (8) are arranged between the middle adapter (4) and the outer protecting pipe (2) of the lower protecting pipe and between the middle adapter (4) and the inner protecting pipe (7) of the lower protecting pipe;
the upper end of the lower rotary joint (6) extends into the space between the outer protecting pipe (2) of the lower protecting pipe and the inner protecting pipe (7) of the lower protecting pipe, and rubber sealing rings (8) are arranged between the lower rotary joint (6) and the outer protecting pipe (2) of the lower protecting pipe and between the lower rotary joint (6) and the inner protecting pipe (7) of the lower protecting pipe.
A gate valve (11) is mounted on the stator adapter (1), a motor side oil duct (12) is formed in the middle of the side wall of the stator adapter (1), the motor side oil duct (12) is connected with the upper cavity (9), the gate valve (11) for blocking and opening the motor side oil duct (12) is arranged on the motor side oil duct (12), the gate valve (11) is opened, the motor side oil duct (12) is communicated with the upper cavity (9), the gate valve (11) is closed, and the motor side oil duct (12) is closed with the upper cavity (9);
the gate valve (11) is a structure which is axially vertical to the axial direction of the motor side oil duct (12) and can rotate, an oil drain hole (13) is formed in the gate valve (11), the axial direction of the oil drain hole (13) is vertical to the axial direction of the gate valve (11), the position of the oil drain hole (13) corresponds to the position of the motor side oil duct (12), namely when the oil drain hole (13) in the gate valve (11) rotates to be aligned with the motor side oil duct (12) (the axial direction of the oil drain hole (13) is coincident with or parallel to the axial direction of the motor side oil duct (12)), the motor side oil duct (12) is communicated with the upper cavity (9), motor oil in the linear motor protector and motor oil in the cylindrical submersible linear motor stator mutually circulate, and when the oil drain hole (13) in the gate valve (11) rotates to be 90 degrees with the motor side oil duct (12), the circulation of the motor oil in the linear motor protector and the cylindrical linear motor protector (namely the axial direction of the oil drain hole (13) and the axial direction of the motor side oil duct (12) is The structure of the gate valve (11) is the same as the principle of a ball valve in the water supply field, and the description is omitted);
the metal bag unit (3) comprises a seat (20), an inner metal corrugated bag (21), an outer metal corrugated bag (22) and a base (23), wherein the inner metal corrugated bag (21) is arranged in the outer metal corrugated bag (22) (the inner metal corrugated bag (21) is sleeved outside the inner protection pipe (7)) and a bag inner cavity (17) of the corrugated bag is formed between the inner metal corrugated bag (21) and the outer metal corrugated bag (22); the upper ends of the inner metal corrugated bag (21) and the outer metal corrugated bag (22) are connected with the base (23), the lower ends of the inner metal corrugated bag (21) and the outer metal corrugated bag (22) are connected with the connecting seat (20), and the connecting seat (20) is provided with a liquid throughput hole (27) communicated with the bag inner cavity (17).
The base (23) is provided with the guide ball (24), and only the rolling guide ball (24) is arranged between the base (23) and the inner wall of the outer protective pipe (2) and between the base (23) and the outer wall of the inner protective pipe (7). The base (23) is ensured to move freely between the protective tube (7) and the outer protective tube (2), the base (23) is provided with a groove for accommodating a guide ball (24), and a base cover plate (25) is additionally arranged after the guide ball (24) is arranged, namely the guide ball (24) in the metal bag unit (3) is arranged between the base (23) and the base cover plate (25) and can roll freely, the number of the guide ball is 6-12, and the base (23) and the base cover plate (25) are fixed together by a bolt (26); the guide ball (24) freely rolls with the outer protective pipe (2) and the inner protective pipe (7) to play a role in guiding and reducing friction.
An oil separating ring (5) is arranged at the upper end of the metal bag unit (3) in the lower cavity (10), the oil separating ring (5) is composed of a ring body (28) and an oil scraper ring (29), the outer circle side wall and the inner circle side wall of the oil scraper ring (29) are respectively provided with the oil scraper ring (29), (namely, the oil scraper ring (29) is movably and hermetically arranged between the ring body (28) and the inner wall of the outer protecting pipe (2) and between the ring body (28) and the outer wall of the inner protecting pipe (7) and can axially move along the inner protecting pipe (7))
The ring body (28) is provided with a groove, and the oil scraper ring (29) is arranged in the groove of the ring body (28); after the metal bag unit (3) in the lower cavity (10) fails, the oil-isolating ring (5) becomes a barrier, and the failed protector is effectively isolated.
The middle adapter (4) is of a tubular structure, a linear sliding bearing (14) is arranged at the inner circle of the middle adapter (4), a middle oil duct (15) and a breathing hole (16) are formed in the middle of the side wall of the middle adapter (4) (the breathing hole (16) is communicated with the outside of the middle adapter (4)), and the breathing hole (16) is communicated with a bag inner cavity (17) of the metal bag unit (3) in the upper cavity (9) through a well fluid handling hole (27);
an oil filling valve (18) and an oil drain valve (19) are installed on the lower rotary joint (6), the oil filling valve (18) and the oil drain valve (19) are communicated with the lower cavity (10), and engine oil is filled into the lower cavity (10) and the upper cavity (9) of the protector through the oil filling valve (18), if the pressure in the upper cavity and the lower cavity of the protector is too high, pressure is released through oil drainage of the oil drain valve (19), the lower rotary joint (6) is also of a tubular structure, a linear sliding bearing (14) is also placed at the inner circle of the lower rotary joint (6), and a breathing hole (16) is also formed in the middle of the side wall of the lower rotary joint (6); the breathing hole (16) is communicated with a bag inner cavity (17) of the metal bag unit (3) in the lower cavity (10) through a well fluid throughput hole (27).
When the metal bag unit (3) is connected with the middle adapter (4) or the lower adapter (6), the well fluid handling hole (27) is communicated with the breathing hole (16) on the middle adapter (4) or the lower adapter (6) in an aligning way, so that the bag inner cavity (17) is ensured to be reliably communicated with the well fluid, and the internal pressure and the external pressure in the upper cavity (9) and the lower cavity (10) are balanced.
The stator adapter (1), the middle adapter (4) and the lower adapter (6) are made of non-magnetic materials, and can be made of 304 or 316L austenitic stainless steel materials, and the linear sliding bearing (14) is made of wear-resistant non-magnetic materials.
When the protector is used, under a normal working state, the upper cavity (9) and the lower cavity (10) of the protector are filled with motor oil, well liquid is filled in the inner cavity (17) of the capsule, and the motor oil and the well liquid are separated through the inner metal corrugated capsule (21), the outer metal corrugated capsule (22), the outer protecting pipe (2) and the inner protecting pipe (7); when the internal pressure of the motor and the protector is lower than the pressure of well liquid, the well liquid enters a well liquid throughput hole (27) of the metal bag unit (3) through a breathing hole (16) of the middle adapter (4) and a breathing hole (16) of the lower adapter (6) and then enters a bag inner cavity (17), the metal corrugated bag (21) and the outer metal corrugated bag (22) are stretched, and motor oil is compressed to offset the pressure of the well liquid; when motor oil in the motor and the protector expands, the pressure is higher than the well fluid pressure, the well fluid in the bag inner cavity (17) is discharged through the well fluid throughput hole (27) and the breathing hole (16), the metal corrugated bag (21) and the outer metal corrugated bag (22) contract, and the space between the upper cavity (9) and the lower cavity (10) is enlarged to accommodate the extra motor oil caused by expansion.
Claims (9)
1. The utility model provides a oily linear electric motor protector of drum formula dives which characterized in that: the protector comprises a stator adapter (1), an outer protective pipe (2), a metal bag unit (3), a middle adapter (4), a lower adapter (6) and an inner protective pipe (7); the inner protecting pipe (7) is arranged in the outer protecting pipe (2) to form a group of protecting pipes, and a gap is reserved between the inner protecting pipe (7) and the outer protecting pipe (2) to be used as a cavity; the protective pipes are divided into two groups, namely an upper protective pipe and a lower protective pipe, the upper protective pipe and the lower protective pipe are connected through a middle adapter (4), the upper end of the upper protective pipe is connected with the stator adapter (1), and the lower end of the lower protective pipe is connected with a lower adapter (6);
the stator adapter (1), the outer protecting pipe (2) of the upper protecting pipe, the middle adapter (4) and the inner protecting pipe (7) of the upper protecting pipe are enclosed to form an upper cavity (9), and a metal bag unit (3) is arranged in the upper cavity (9) to form a main protector;
the middle adapter (4), the outer protecting pipe (2) of the lower protecting pipe, the lower adapter (6) and the inner protecting pipe (7) of the lower protecting pipe are enclosed to form a lower cavity (10), and the oil-isolating ring (5) and the other metal bag unit (3) are arranged in the lower cavity (10) to form an auxiliary protector;
the upper cavity (9) is communicated with the lower cavity (10) through an intermediate oil duct (15) in the intermediate adapter (4);
a gate valve (11) for blocking and opening a motor side oil duct (12) is arranged on the stator adapter (1);
a guide ball (24) is arranged on a base (23) of the metal bag unit (3);
an oil isolating ring (5) is arranged at the upper end of the metal bag unit (3) in the lower cavity (10);
the metal bag unit (3) comprises a connecting seat (20), an inner metal corrugated bag (21), an outer metal corrugated bag (22) and a base (23), the inner metal corrugated bag (21) is arranged in the outer metal corrugated bag (22), and a bag inner cavity (17) is formed between the inner metal corrugated bag (21) and the outer metal corrugated bag (22); the upper ends of the inner metal corrugated bag (21) and the outer metal corrugated bag (22) are connected with the base (23), the lower ends of the inner metal corrugated bag (21) and the outer metal corrugated bag (22) are connected with the connecting seat (20), and the connecting seat (20) is provided with a well fluid throughput hole (27) communicated with the bag inner cavity (17);
the side wall of the middle adapter (4) is provided with the middle oil duct (15) and a breathing hole (16), and the breathing hole (16) is communicated with a bag inner cavity (17) of the metal bag unit (3) in the upper cavity (9) through the well fluid handling hole (27);
the side wall of the lower rotary joint (6) is also provided with a breathing hole (16); the lower rotary joint breathing hole (16) is communicated with a bag inner cavity (17) of the metal bag unit (3) in the lower cavity (10) through the well fluid throughput hole (27).
2. The protector for the cylindrical submersible linear motor according to claim 1, characterized in that: the lower end of the stator adapter (1) extends into a position between an outer protective pipe (2) of the upper protective pipe and an inner protective pipe (7) of the upper protective pipe, rubber sealing rings (8) are arranged between the stator adapter (1) and the outer protective pipe (2) of the upper protective pipe and between the stator adapter (1) and the inner protective pipe (7) of the upper protective pipe;
the upper end of the middle adapter (4) extends into a position between an outer protective pipe (2) of the upper protective pipe and an inner protective pipe (7) of the upper protective pipe, and rubber sealing rings (8) are arranged between the middle adapter (4) and the outer protective pipe (2) of the upper protective pipe and between the middle adapter (4) and the inner protective pipe (7) of the upper protective pipe; the lower end of the middle adapter (4) extends into a position between an outer protecting pipe (2) of the lower protecting pipe and an inner protecting pipe (7) of the lower protecting pipe, and rubber sealing rings (8) are arranged between the middle adapter (4) and the outer protecting pipe (2) of the lower protecting pipe and between the middle adapter (4) and the inner protecting pipe (7) of the lower protecting pipe;
the upper end of the lower rotary joint (6) extends into the space between the outer protecting pipe (2) of the lower protecting pipe and the inner protecting pipe (7) of the lower protecting pipe, and rubber sealing rings (8) are arranged between the lower rotary joint (6) and the outer protecting pipe (2) of the lower protecting pipe and between the lower rotary joint (6) and the inner protecting pipe (7) of the lower protecting pipe.
3. The protector for the cylindrical submersible linear motor according to claim 1, characterized in that: the motor side oil duct (12) is formed in the side wall of the stator adapter (1), the motor side oil duct (12) is connected with the upper cavity (9), and the gate valve (11) for blocking and opening the motor side oil duct (12) is arranged on the motor side oil duct (12);
the gate valve (11) is a structure which is axially vertical to the axial direction of the motor side oil duct (12) and can rotate, an oil drain hole (13) is formed in the gate valve (11), the axial direction of the oil drain hole (13) is vertical to the axial direction of the gate valve (11), the position of the oil drain hole (13) corresponds to the position of the motor side oil duct (12), namely when the oil drain hole (13) in the gate valve (11) rotates to be aligned with the motor side oil duct (12), the motor side oil duct (12) is communicated with the upper cavity (9), and when the oil drain hole (13) in the gate valve (11) rotates to be 90 degrees with the motor side oil duct (12), the oil circulation of the linear motor protector and the motor oil in the cylinder type submersible linear motor stator is blocked.
4. The protector for the cylindrical submersible linear motor according to claim 3, characterized in that: the guide balls (24) capable of rolling are arranged between the base (23) and the inner wall of the outer protection pipe (2) and between the base (23) and the outer wall of the inner protection pipe (7).
5. The protector for the cylindrical submersible linear motor according to claim 4, characterized in that: the oil separating ring (5) consists of a ring body (28) and an oil scraping ring (29), and the outer circle side wall and the inner circle side wall of the ring body (28) are both provided with the oil scraping ring (29).
6. The protector for the cylindrical submersible linear motor according to claim 5, wherein: the ring body (28) is provided with a groove, and the oil scraper ring (29) is arranged in the groove of the ring body (28).
7. The protector for the cylindrical submersible linear motor according to any one of claims 4 to 6, wherein: the middle adapter (4) is of a tubular structure, and a linear sliding bearing (14) is arranged at the inner circle of the middle adapter (4);
install oiling valve (18) and bleeder valve (19) down on connecting (6), oiling valve (18) and bleeder valve (19) all communicate with cavity (10) down, inject motor oil into cavity (10) and epicoele body (9) under to the protector through oiling valve (18), if the internal pressure of upper and lower cavity of protector is too big, release pressure through bleeder valve (19) draining, straight line slide bearing (14) have also been laid to lower round department in connecting (6).
8. The protector for the cylindrical submersible linear motor according to claim 7, wherein: the stator adapter (1), the middle adapter (4) and the lower adapter (6) are all made of non-magnetic materials, 304 or 316L austenitic stainless steel materials are adopted, and the linear sliding bearing (14) is made of wear-resistant non-magnetic materials.
9. The protector for the cylindrical submersible linear motor according to claim 7, wherein: when the protector is used, under a normal working state, the upper cavity (9) and the lower cavity (10) of the protector are filled with motor oil, well liquid is filled in the inner cavity (17) of the capsule, and the motor oil and the well liquid are separated through the inner metal corrugated capsule (21), the outer metal corrugated capsule (22), the outer protecting pipe (2) and the inner protecting pipe (7); when the internal pressure of the motor and the protector is lower than the pressure of well liquid, the well liquid enters the well liquid throughput hole (27) of the metal bag unit (3) through the breathing hole (16) of the middle adapter (4) and the breathing hole (16) of the lower adapter (6) and then enters the bag inner cavity (17), the inner metal corrugated bag (21) and the outer metal corrugated bag (22) are stretched, and the motor oil is compressed to counteract the pressure of the well liquid; when motor oil inside the motor and the protector expands, the pressure is higher than the pressure of well fluid, the well fluid in the bag inner cavity (17) is discharged through the well fluid throughput hole (27) and the breathing hole (16), the inner metal corrugated bag (21) and the outer metal corrugated bag (22) contract, and the space of the upper cavity (9) and the lower cavity (10) is increased to accommodate the extra motor oil caused by expansion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811198069.4A CN109412310B (en) | 2018-10-15 | 2018-10-15 | Cylinder type oil-submersible linear motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811198069.4A CN109412310B (en) | 2018-10-15 | 2018-10-15 | Cylinder type oil-submersible linear motor protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109412310A CN109412310A (en) | 2019-03-01 |
| CN109412310B true CN109412310B (en) | 2020-12-25 |
Family
ID=65467244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811198069.4A Active CN109412310B (en) | 2018-10-15 | 2018-10-15 | Cylinder type oil-submersible linear motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109412310B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478495A (en) * | 2020-05-21 | 2020-07-31 | 沈阳方舟石油科技发展有限公司 | Metal bag type protector for high-temperature submersible motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201991758U (en) * | 2010-12-27 | 2011-09-28 | 重庆虎溪电机厂 | Sealing protector of electrical submersible pump unit |
| CN202284532U (en) * | 2011-09-07 | 2012-06-27 | 天津市百成油田采油设备制造有限公司 | Two-stage sealing three-cavity electric submersible pump protector with settling chamber serially connected with two parallel capsule chambers |
| CN204928494U (en) * | 2015-09-28 | 2015-12-30 | 中国石油集团渤海石油装备制造有限公司 | Submersible motor's series connection capsule protector |
| CN105186792B (en) * | 2015-09-29 | 2017-04-19 | 沈阳工业大学通益科技有限公司 | high-temperature submersible motor protector |
| CN205446148U (en) * | 2016-03-28 | 2016-08-10 | 瑞安市华昊泵业有限公司 | Corrugated metal pipe submersible motor protector |
| CN205533200U (en) * | 2016-04-13 | 2016-08-31 | 东营凯维石油科技有限责任公司 | Protector of electrical submersible pump screw pump reduction gear special use in pit |
-
2018
- 2018-10-15 CN CN201811198069.4A patent/CN109412310B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109412310A (en) | 2019-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214247296U (en) | Large-drift-diameter bypass manifold structure | |
| CN112628607A (en) | Fracturing high-low pressure manifold system with prying at bottom of large-drift-diameter bypass manifold | |
| CN109412310B (en) | Cylinder type oil-submersible linear motor protector | |
| CN104454477B (en) | A kind of sealing device for electric submersible oil reciprocation pump oil extraction system | |
| CN101860108B (en) | Metal bellow type high-temperature motor protector | |
| CN106979187B (en) | A kind of hydraulic cylinder being used to support | |
| CN113756726B (en) | Adjustable high-pressure manifold and system | |
| CN104948185B (en) | The sealed development machine internal spraying of multi-stage mechanical rotates water sealing device | |
| CN103759010B (en) | For the packing shaft seal structure of high pressure reciprocating pump | |
| CN103573206B (en) | Rotary assembly of active sealing type rotary blowout preventer | |
| CN105370755B (en) | Fluid-flywheel clutch | |
| CN111769680A (en) | Radial magnetic circuit submersible linear motor | |
| CN105186792A (en) | High-temperature submersible motor protector | |
| CN203751024U (en) | Improved rotating joint for uncoiler | |
| CN212462953U (en) | High-temperature submersible motor up-down protector | |
| CN111577192B (en) | Orifice pressure-bearing sealing device for underground coal mine water prevention and control composite directional drilling | |
| CN114526208A (en) | Energy-saving and environment-friendly oil pipe conveying oil cylinder | |
| CN207454817U (en) | One kind can dismount top mounting ball valve online | |
| CN202745428U (en) | Lifting platform for aquacade | |
| CN201726224U (en) | Metal bellows type high-temperature motor protector | |
| RU73385U1 (en) | PUMPING INSTALLATION FOR WATER PUMPING IN A WELL WITH LOW COLLECTOR PROPERTIES OF THE OIL LINE | |
| CN204371621U (en) | A kind of seal arrangement for electric submersible oil reciprocation pump oil production system | |
| CN111884404B (en) | Up-down protector for high-temperature submersible motor | |
| CN205064435U (en) | Plunger type cylinder | |
| CN205388050U (en) | High pressure resistant rinse -system with many sets of mechanical seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221117 Address after: No. 008, Canglongquan Street, Laiwu High tech Zone, Jinan, Shandong 250022 Patentee after: SHANDONG WEIMA PUMPS MANUFACTURING Co.,Ltd. Address before: No.111 Shenyang West Liaoning Economic Development Zone Patentee before: SHENYANG University OF TECHNOLOGY |