CN116576208A - Mechanical brake device for oil pumping unit - Google Patents

Mechanical brake device for oil pumping unit Download PDF

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Publication number
CN116576208A
CN116576208A CN202310860581.5A CN202310860581A CN116576208A CN 116576208 A CN116576208 A CN 116576208A CN 202310860581 A CN202310860581 A CN 202310860581A CN 116576208 A CN116576208 A CN 116576208A
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CN
China
Prior art keywords
brake
pumping unit
permanent magnet
rotating
rack
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.)
Granted
Application number
CN202310860581.5A
Other languages
Chinese (zh)
Other versions
CN116576208B (en
Inventor
王付全
高志炜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Karamay City Shengqi Drilling Equipment Co ltd
Original Assignee
Karamay City Shengqi Drilling Equipment Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Karamay City Shengqi Drilling Equipment Co ltd filed Critical Karamay City Shengqi Drilling Equipment Co ltd
Priority to CN202310860581.5A priority Critical patent/CN116576208B/en
Publication of CN116576208A publication Critical patent/CN116576208A/en
Application granted granted Critical
Publication of CN116576208B publication Critical patent/CN116576208B/en
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/2255—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is pivoted
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
    • F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
    • 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
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/14—Mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
    • F16D2125/24—Rack-and-pinion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/58—Mechanical mechanisms transmitting linear movement
    • F16D2125/582—Flexible element, e.g. spring, other than the main force generating element

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to the technical field of oil pumping units, in particular to a mechanical brake device for an oil pumping unit. The electric control reversing pumping unit comprises an electric control reversing pumping unit body and is characterized in that rotary sleeves are concentrically fixed on the front side and the rear side of a rotor of a permanent magnet outer rotor motor at the upper end of the electric control reversing pumping unit body, brake discs are concentrically fixed on the rotary sleeves, brake assemblies are fixedly arranged at the upper end of the electric control reversing pumping unit body on one side of each brake disc, the brake assemblies can clamp the brake discs on one side of each brake assembly to brake the rotor of the permanent magnet outer rotor motor, spiral grooves are formed in the outer sides of the rotary sleeves, and the spiral directions and the spiral pitches of the spiral grooves in the outer sides of the two rotary sleeves are identical. The invention has low failure rate and low technical quality requirement on maintenance personnel, and can reduce maintenance cost.

Description

Mechanical brake device for oil pumping unit
Technical Field
The invention relates to the technical field of oil pumping units, in particular to a mechanical brake device for an oil pumping unit.
Background
In the petroleum industry, along with the continuous updating of oil reservoir exploration technology, deeper oil reservoirs and developments are also accompanied besides the traditional beam pumping unit at present. The existing beam pumping unit has the disadvantages. Beam-free pumping units have also been used in recent years for reservoir recovery. The characteristics of long stroke and low stroke frequency of the beam-free pumping unit show advantages in the exploration and development of deep wells and ultra-deep wells. At present, in a transmission mode of a beam-free pumping unit, two types of electric control reversing and mechanical reversing are adopted.
The belt type pumping unit in the electric control reversing pumping unit is more applied. But the oil pumping machine is operated for 24 hours in the open air in the sun and in the severe cold summer. Brings great test to the control equipment of the electric control reversing. Once the control equipment fails, ages or misjudges, immeasurable losses are brought to the equipment and the oil well.
Compared with an electrically controlled braking device, the mechanical braking device is more visual and safer, the braking state of the equipment can be determined visually, the condition of the equipment can be judged more simply, and an operator can judge the condition of the equipment more intuitively. The electric braking device cannot be manufactured, and the electric device also needs professional personnel to overhaul, so that the later maintenance cost is increased.
Disclosure of Invention
The mechanical braking device for the pumping unit, which is used for preventing the condition that the rope hanger of the pumping unit impacts a wellhead device or a weight box impacts the bottom of a frame body, can effectively brake the pumping unit after the electric control reversing failure.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the utility model provides a mechanical brake braking device for beam-pumping unit, including automatically controlled switching-over beam-pumping unit body, both sides all are fixed with the cover that changes around the rotor of the permanent magnetism external rotor motor of automatically controlled switching-over beam-pumping unit body upper end, all be fixed with the brake disc on the cover that changes, automatically controlled switching-over beam-pumping unit body upper end of brake disc one side all is fixed with the brake assembly, the brake assembly can centre gripping its one side the brake disc brakes the rotor of permanent magnetism external rotor motor, the spiral groove has all been processed in the cover outside, the spiral groove in two cover outsides revolves to, the pitch is the same, the brake assembly includes the stabilizing frame, it is connected with two swivel fingers to rotate in the stabilizing frame, the swivel finger is connected with the brake block towards the one end rotation of brake disc, the brake disc is located between two brake blocks, the tip that the swivel finger kept away from the brake disc passes through synchro-mechanism drive, the one side that keeps away from the rotor of permanent magnetism external rotor motor on the stabilizing frame slides and is provided with the drive plate, be fixed with the guide bar on the drive plate, the guide bar is located the spiral groove of its one side.
The spiral groove can drive the driving plate to move in the axial direction of the permanent magnet outer rotor motor through the guide rod in the rotating process of the rotating sleeve. In the motion process of the driving plate, the end parts, far away from the brake disc, of the two rotating claws can be driven by the synchronous mechanism to be far away from each other, and the two brake blocks can clamp and brake the brake disc.
Only one side of the brake assembly can brake the rotor of the permanent magnet outer rotor motor in the rotating process.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, when the rotor of the permanent magnet outer rotor motor rotates beyond a set number of turns due to failure of electric control reversing, the brake assembly can clamp and brake the brake disc, and the situation that the weight box impacts the electric control reversing pumping unit body due to overlarge descending distance of the rope hanger and the wellhead device is impacted or the ascending distance of the rope hanger is overlarge can be avoided.
2. The brake assembly does not need electric control, is more visual and safe, can determine the braking state of the equipment by visual observation, can judge the condition of the equipment more simply, and can enable operators to judge the condition of the equipment more intuitively.
3. The failure rate is low, the technical quality requirement on maintenance personnel is low, and the maintenance cost can be reduced.
Drawings
Fig. 1 is a front view of an electronically controlled reversing pumping unit body.
Fig. 2 is a top view of the electronically controlled reversing pumping unit body.
FIG. 3 is an elevation view of the brake assembly mated with a brake disc.
FIG. 4 is a top view of the brake assembly mated with a brake disc.
FIG. 5 is a schematic illustration of a brake assembly.
FIG. 6 is an exploded view of the brake assembly.
The names of the parts in the drawings are as follows:
1. electric control reversing oil pumping unit body
2. Permanent magnet outer rotor motor
3. Brake assembly
4. Support frame
5. Weight box
201. Rotor
202. Brake disc
203. Stator shaft
204. Rotary sleeve
205. Spiral groove
301. End cap
3011. Upper chute
302. Fixed block
3021. Pin shaft
303. Rotary claw
3031. Pull rod
304. Supporting plate
3041. Dovetail groove
305. Bolt
306. Brake block
3061. Rotary pin
307. Tension spring
308. Driving plate
3081. Sliding block
309. Guide rod
310. Rack bar
311. Gear wheel
312. Bump block
3121. And a lower chute.
Detailed Description
As shown in fig. 1-6, a mechanical brake device for a pumping unit comprises an electric control reversing pumping unit body 1, wherein a rotor sleeve 204 is concentrically fixed on the front side and the rear side of a rotor 201 of a permanent magnet outer rotor motor 2 at the upper end of the electric control reversing pumping unit body 1, and the rotor sleeve 204 is rotationally connected with a stator shaft 203 of the permanent magnet outer rotor motor 2. The rotor sleeves 204 are concentrically fixed with brake discs 202, the upper ends of the electric control reversing pumping unit bodies 1 on one sides of the brake discs 202 are respectively fixed with a brake assembly 3, the brake assemblies 3 can clamp the brake discs 202 on one sides of the brake assemblies to brake the rotor 201 of the permanent magnet outer rotor motor 2, spiral grooves 205 are formed in the outer sides of the rotor sleeves 204, and the spiral directions and the screw pitches of the spiral grooves 205 in the outer sides of the two rotor sleeves 204 are identical.
When the electric reversing normally works, the upper limit of the number of forward rotation turns of the rotor 201 of the permanent magnet outer rotor motor 2 and the upper limit of the number of reverse rotation turns of the rotor 201 of the permanent magnet outer rotor motor 2 are arranged in the electric reversing of the electric reversing pumping unit body 1. When the electric reversing pumping unit works, the state that the number of forward rotation turns and the number of reverse rotation turns of the rotor 201 of the permanent magnet outer rotor motor 2 of the electric reversing pumping unit body 1 do not exceed the set upper limit is a normal reversing state. The brake assembly 3 comprises a stabilizing frame, two rotating claws 303 are rotatably connected in the stabilizing frame, the stabilizing frame comprises an end cover 301 and a support plate 304, the two rotating claws 303 are positioned between the end cover 301 and the support plate 304, the rotating claws 303 are rotatably connected with the end cover 301 and the support plate 304 through bolts 305, the bolts 305 penetrate through the end cover 301 and the support plate 304, the bolts 305 penetrate through the rotating claws 303, and the rotating claws 303 are rotatably connected with the bolts 305. The bolt 305 is fixedly connected with the support 4, and the support 4 is fixed at the upper end of the electric control reversing pumping unit body 1.
The rotating claw 303 is rotatably connected to a brake block 306 at one end of the brake disc 202, and the brake block 306 is rotatably connected to the rotating claw 303 by a rotating pin 3061. The brake disc 202 is located between two brake pads 306.
The rotary claws 303 are fixed with a pull rod 3031 at one end far away from the brake block 306, and the pull rods 3031 on the two rotary claws 303 are connected through a tension spring 307.
The end part of the rotating claw 303, which is far away from the brake disc 202, is driven by a synchronous mechanism, a driving plate 308 is arranged on one side of the stabilizing frame, which is far away from the rotor 201 of the permanent magnet outer rotor motor 2, a dovetail groove 3041 is formed in the support plate 304, the length direction of the dovetail groove 3041 is parallel to the axial direction of the permanent magnet outer rotor motor 2, a sliding block 3081 is fixed on the driving plate 308, and the sliding block 3081 is in sliding clamping connection in the dovetail groove 3041. When the electronically controlled reversing oil pumping unit body 1 is in a normal reversing state, the sliding block 3081 always slides in the dovetail groove 3041.
A guide rod 309 is fixed on the driving plate 308, the guide rod 309 is positioned in the spiral groove 205 at one side of the guide rod, and the spiral groove 205 can drive the driving plate 308 to move in the axial direction of the permanent magnet outer rotor motor 2 through the guide rod 309 during the rotation of the rotor 204.
In the normal reversing state of the electronically controlled reversing oil pumping unit body 1, the number of turns of the rotor 201 of the permanent magnet outer rotor motor 2 does not exceed the upper limit set in electronically controlled reversing. In the normal commutation state of the electronically commutated pumping unit body 1, the cooperation of the guide rod 309 with the helical groove 205 on one side thereof causes the drive plate 308 to move. In the normal reversing state, the electronically controlled reversing oil pumping unit body 1 is not contacted with the rack 310 in the process of moving the driving plate 308, and the sliding block 3081 always slides in the dovetail groove 3041.
After failure of the electric control commutation, the number of turns of the rotor 201 of the permanent magnet outer rotor motor 2 actually rotates exceeds the upper limit set in the electric control commutation. At this time, the guide bar 309 is engaged with the spiral groove 205 at one side thereof such that the length of the movement of the driving plate 308 is increased, and the driving plate 308 can drive the rack 310 under the brake assembly 3 at one side thereof to move. After failure of the electronic control commutation, the slider 3081 always slides in the dovetail groove 3041 during the movement of the drive plate 308.
During the movement process of the driving plate 308, one ends of the two rotating claws 303 far away from the brake disc 202 can be driven by the synchronous mechanism to be far away from each other, the two rotating claws 303 rotate and enable the two brake blocks 306 to clamp and brake the brake disc 202, and only one side of the brake assembly 3 can brake the rotor 201 of the permanent magnet outer rotor motor 2 during the rotation process. When the electric control reversing oil pumping unit body 1 works, the electric control reversing enables the rotor 201 of the permanent magnet outer rotor motor 2 to rotate forward for a set number of turns, and then enables the rotor 201 of the permanent magnet outer rotor motor 2 to rotate reversely for a set number of turns. During the forward rotation of the rotor 201, the weight box 5 descends, and the rope hanger drives the polish rod to perform oil pumping operation. In the process of reverse rotation of the rotor 201, the weight box 5 ascends to store potential energy, and the rope hanger and the polish rod descend.
In this embodiment, the spiral grooves 205 on the outer sides of the two turndown sleeves 204 have the same rotation direction and pitch. The movement direction of the driving plates 308 at both sides of the permanent magnet outer rotor motor 2 is always the same whether the rotor 201 is rotating forward or backward. During rotation of the rotor 201 of the permanent magnet outer rotor motor 2, one of the drive plates 308 is close to the permanent magnet outer rotor motor 2, and the other drive plate 308 is far from the permanent magnet outer rotor motor 2.
Referring to fig. 5, the principle of the brake assembly 3 braking the disc 202 is as follows: after the driving plate 308 contacts with the lower rack 310 in the brake assembly 3, the upper rack 310 moves under the action of the gear 311 as the driving plate 308 pushes the lower rack 310 to move along with the continuous movement of the driving plate 308. The lower rack 310 pushes the rotating claw 303 on one side to rotate in the moving process, and the upper rack 310 pushes the rotating claw 303 on one side to rotate in the moving process, so that two brake blocks 306 in the brake assembly 3 are close to each other, and the brake disc 202 is clamped and braked.
Since the permanent magnet outer rotor motor 2 is operated, the rotor 201 needs to rotate in the forward direction and then rotate in the reverse direction. When the electric control commutation fails in the forward rotation process of the rotor 201 of the permanent magnet outer rotor motor 2, the rotor 201 of the permanent magnet outer rotor motor 2 always rotates forward. At this time, one of the brake assemblies 3 is capable of braking. On the contrary, when the electric control commutation fails in the process of reversely rotating the rotor 201 of the permanent magnet outer rotor motor 2, the rotor 201 of the permanent magnet outer rotor motor 2 always reversely rotates, and the other brake assembly 3 can be used for braking.
The synchronous mechanism comprises a fixed block 302 fixed between the end cover 301 and the support plate 304, a pin shaft 3021 is fixed on the fixed block 302, the pin shaft 3021 is perpendicular to the bolt 305, a gear 311 is concentrically and rotatably connected to the pin shaft 3021, racks 310 are slidably connected to the end cover 301 and the support plate 304, the length direction of the racks 310 is perpendicular to the axial direction of the pin shaft 3021, the gear 311 is located between the two racks 310, and the gear 311 is meshed with the racks 310. An upper chute 3011 is formed at the lower end of the end cover 301, and the rack 310 above is slidably clamped in the upper chute 3011. The upper rack 310 is tightly abutted against one rotating claw 303, the supporting plate 304 is fixedly provided with a protruding block 312, the lower rack 310 is slidably arranged in a lower chute 3121 on the protruding block 312, the lower rack 310 is tightly abutted against the other rotating claw 303, and the brake blocks 306 on the two rotating claws 303 can be mutually close through the engagement of the rack 310 and the gear 311 in the process of moving the driving plate 308.
When the rotor 201 of the permanent magnet outer rotor motor 2 drives the weight box 5 to go up through the belt, the rotor 201 drives the rotor sleeve 204 to rotate, and as the pitch and the rotation direction of the spiral grooves 205 on the rotor sleeve 204 on both sides are the same, the driving plate 308 on the rear side of the permanent magnet outer rotor motor 2 and the driving plate 308 on the front side of the permanent magnet outer rotor motor 2 both move at the same speed in the rear side direction, namely, the direction indicated by the arrow in fig. 4. The rear drive plate 308 is far from the permanent magnet outer rotor motor 2, and the front drive plate 308 is gradually close to the permanent magnet outer rotor motor 2.
In the normal reversing state of the electronically controlled reversing oil pumping unit body 1, under the cooperation of the spiral groove 205 and the guide rod 309, the driving plate 308 moves back and forth in the axial direction of the permanent magnet outer rotor motor 2, and the driving plate 308 is not contacted with the rack 310 at one side of the driving plate.
When the electric control commutation fails, the number of turns of the rotor 201 of the permanent magnet outer rotor motor 2 exceeds the upper limit set by the electric control commutation, the movement length of the driving plate 308 is increased, and the driving plate 308 gradually approaching to the permanent magnet outer rotor motor 2 can drive the rack 310 below the one side of the brake assembly 3 to move and brake.
When the rotor 201 of the permanent magnet outer rotor motor 2 drives the weight box 5 to ascend through a belt, after the front driving plate 308 contacts with the lower rack 310 in the front brake assembly 3, the front driving plate 308 pushes the lower rack 310 in the front brake assembly 3 to move towards the rear direction along with the continuous backward movement of the front driving plate 308, and when the rack 310 is meshed with the gear 311, the upper rack 310 in the front brake assembly 3 moves towards the front direction. In the front brake assembly 3, the lower rack 310 pushes the rear rotating claw 303 to rotate in the process of moving to the rear, and the upper rack 310 pushes the front rotating claw 303 to rotate in the process of moving to the front, so that two brake blocks 306 in the front brake assembly 3 are close to each other until the two brake blocks 306 in the front brake assembly 3 clamp and brake the front brake disc 202, and the rotor 201 of the permanent magnet outer rotor motor 2 is prevented from continuing to rotate to cause the rope hanger to strike the wellhead device.
When the rotor 201 of the permanent magnet outer rotor motor 2 drives the rope hanger to go up through the belt, the driving plate 308 at the rear side of the permanent magnet outer rotor motor 2 and the driving plate 308 at the front side of the permanent magnet outer rotor motor 2 move in the front side direction, the driving plate 308 at the rear side is close to the permanent magnet outer rotor motor 2, and the driving plate 308 at the front side is gradually far away from the permanent magnet outer rotor motor 2.
When the rear driving plate 308 is in contact with the lower rack 310 of the rear brake assembly 3 and the rear driving plate 308 moves forward, the upper rack 310 of the rear brake assembly 3 moves in the rear direction by the engagement of the rack 310 with the gear 311 as the rear driving plate 308 pushes the lower rack 310 of the rear brake assembly 3 in the front direction. In the rear brake assembly 3, the lower rack 310 pushes the front rotating claw 303 to rotate in the process of moving forward, and the upper rack 310 pushes the rear rotating claw 303 to rotate in the process of moving backward, so that two brake blocks 306 in the rear brake assembly 3 are close to each other until the two brake blocks 306 in the rear brake assembly 3 clamp and brake the rear brake disc 202, thereby preventing the rotor 201 of the permanent magnet outer rotor motor 2 from continuing to rotate and leading the lower end of the weight box 5 to impact the electronically controlled reversing pumping unit body 1.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (9)

1. The mechanical brake device for the pumping unit comprises an electric control reversing pumping unit body (1), and is characterized in that rotors (201) of a permanent magnet outer rotor motor (2) at the upper end of the electric control reversing pumping unit body (1) are concentrically fixed with rotating sleeves (204), brake discs (202) are concentrically fixed on the rotating sleeves (204), brake assemblies (3) are fixedly arranged at the upper end of the electric control reversing pumping unit body (1) at one side of each brake disc (202), the brake assemblies (3) can clamp the brake discs (202) at one side of each brake assembly to brake the rotor (201) of the permanent magnet outer rotor motor (2), spiral grooves (205) are formed in the outer sides of the rotating sleeves (204), the spiral grooves (205) at the outer sides of the two rotating sleeves (204) are identical in rotation direction and thread pitches, each brake assembly (3) comprises a stabilizing frame, one end of each rotating claw (303) facing the disc (202) is rotationally connected with a brake block (306), each brake disc (202) is positioned between the two brake blocks (306), the end of each rotating claw (303) far away from the brake disc (202) is clamped by the brake disc (202), a synchronous motor (204) is provided with a guide plate (308) far away from the rotor (308), a driving plate (308) on one side of the rotor (2), in the helical groove (205) that guide bar (309) is located its one side, the spiral groove (205) can be through guide bar (309) drive plate (308) in the axial direction of permanent magnet external rotor motor (2) in the rotation process of cover (204), and the tip that two rotatory claw (303) were kept away from brake disc (202) in the motion process of drive plate (308) can be kept away from each other through synchromesh to make two brake blocks (306) carry out centre gripping braking to brake disc (202), and only one side's brake assembly (3) can brake it in the rotor (201) rotation process of permanent magnet external rotor motor (2).
2. The mechanical brake device for a pumping unit according to claim 1, wherein the rotor (204) is rotatably connected with a stator shaft (203) of the permanent magnet outer rotor motor (2).
3. The mechanical brake device for a pumping unit according to claim 1, wherein the stabilizing frame comprises an end cover (301) and a support plate (304), the two rotating claws (303) are located between the end cover (301) and the support plate (304), the rotating claws (303) are rotatably connected with the end cover (301) and the support plate (304) through bolts (305), the bolts (305) penetrate through the end cover (301) and the support plate (304), the bolts (305) penetrate through the rotating claws (303), and the rotating claws (303) are rotatably connected with the bolts (305).
4. A mechanical brake device for a pumping unit according to claim 3, wherein the synchronizing mechanism comprises a fixed block (302) fixed between the end cover (301) and the support plate (304), a pin shaft (3021) is fixed on the fixed block (302), the pin shaft (3021) is perpendicular to the bolt (305), a gear (311) is concentrically and rotatably connected to the pin shaft (3021), a rack (310) is slidably connected to each of the end cover (301) and the support plate (304), the length direction of the rack (310) is perpendicular to the axial direction of the pin shaft (3021), the gear (311) is located between the two racks (310), the gear (311) is meshed with the rack (310), the end part of the rack (310) above is tightly abutted against one rotating claw (303), the end part of the rack (310) below is tightly abutted against the other rotating claw (303), and the brake block (306) on the two rotating claws (303) can be mutually close through the meshing of the rack (310) and the gear (311) in the moving process of the driving plate (308).
5. The mechanical brake device for a pumping unit according to claim 4, wherein the supporting plate (304) is fixed with a protruding block (312), the rack (310) below is slidably arranged in a lower chute (3121) on the protruding block (312), the lower end of the end cover (301) is provided with an upper chute (3011), and the rack (310) above is slidably clamped in the upper chute (3011).
6. A mechanical brake device for a pumping unit according to claim 1, characterized in that the brake block (306) is rotatably connected to the rotary claw (303) by means of a rotation pin (3061).
7. The mechanical brake device for the pumping unit according to claim 5, wherein the support plate (304) is provided with a dovetail groove (3041), the length direction of the dovetail groove (3041) is parallel to the axial direction of the permanent magnet outer rotor motor (2), the driving plate (308) is fixedly provided with a sliding block (3081), and the sliding block (3081) is in sliding clamping connection with the dovetail groove (3041).
8. The mechanical brake device for the pumping unit according to claim 1, wherein the end of the rotating claw (303) far away from the brake block (306) is fixed with a pull rod (3031), and the pull rods (3031) on the two rotating claws (303) are connected through a tension spring (307).
9. A mechanical brake device for a pumping unit according to claim 3, wherein the bolt (305) is fixedly connected with the bracket (4), and the bracket (4) is fixed at the upper end of the electronically controlled reversing pumping unit body (1).
CN202310860581.5A 2023-07-14 2023-07-14 Mechanical brake device for oil pumping unit Active CN116576208B (en)

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