A sliding vane hydraulic brake

Abstract

The utility model provides a kind of sliding vane type hydraulic brake, belong to petroleum engineering technical field, including cylinder seat, cylinder body and cylinder cover, the cylinder seat is connected with cylinder body and cylinder cover respectively by bolt, it is characterized in that, further include: tapered roller bearing, fixedly installed in cylinder seat and cylinder cover inner wall, its inner ring is fixed with limit block A;Screw pump transmission rod, outer wall is equipped with axial limit slot, the limit block A is slidably embedded in limit slot;One-way rotating component includes: limit block B, slidingly connected in limit slot inner wall.In the utility model, the roller, inclined slot etc. of one-way rotating component set are quickly locked rotor when screw pump transmission rod reverses, cooperate the blade and liquid cavity of reverse torsion component to convert reverse energy into liquid terminal pressure, then into anti-torsion torque, effectively inhibit the reverse speed of screw pump ground driving device, avoid safety accident caused by violent reverse, realize energy soft release, protect equipment and personnel safety.

Description

Technical Field

[0001] This utility model relates to the field of petroleum engineering technology, and more specifically, to a sliding vane hydraulic brake. Background Technology

[0002] A screw pump is a positive displacement rotary pump, mainly composed of a screw (usually one driving screw and two driven screws), a pump casing, etc. By rotating the screw inside the pump casing, the volume of the screw meshing space changes periodically, realizing the suction, transportation and discharge of liquid. It is widely used in petroleum, chemical, sewage treatment and other fields, especially in oilfield development where it is often used for downhole oil production. It has the characteristics of stable flow, small pressure pulsation, compact structure and strong adaptability to media.

[0003] However, when the screw pump ground drive unit stops or suddenly loses power, the elastic deformation of the downhole sucker rod and the potential energy of the oil well fluid force the screw pump ground drive unit to reverse violently to release energy, which can easily cause major safety accidents such as personal injury and equipment damage.

[0004] Therefore, a sliding vane hydraulic brake is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a sliding vane hydraulic brake to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution: A sliding vane hydraulic brake includes a cylinder seat, a cylinder body, and a cylinder head, wherein the cylinder seat is connected to the cylinder body and the cylinder head respectively by bolts, and further includes: Tapered roller bearings are fixedly installed on the inner wall of the cylinder seat and cylinder head, and a limiting block A is fixedly provided on the inner ring; The screw pump drive rod has an axial limiting groove on its outer wall, and the limiting block A is slidably fitted into the limiting groove; A one-way rotation assembly includes: Limiting block B is slidably connected to the inner wall of the limiting groove; The inner ring is fixed to the outer wall of the limiting block B, and multiple inclined grooves are evenly opened in the circumference. The return spring and the push rod are connected together. One end of the return spring is fixed to the inner wall of the inclined groove, and the other end is connected to the push rod. The rollers are fixed to the outer wall of the push rod and abut against the inner wall of the inclined groove and the inner wall of the rotor. The liquid chamber is located on the inner wall of the cylinder and is filled with hydraulic oil. An anti-torque component is disposed on the outer wall of the inner ring, and the anti-torque component cooperates with the unidirectional rotation component.

[0007] As a preferred technical solution of this application, the anti-torsion component includes: The rotor is rotatably connected to the outer wall of the inner ring, and multiple guide grooves are opened circumferentially on its inner wall. The blades are slidably mounted in the guide groove; A powerful spring is fixedly connected at both ends to the blade and the inner wall of the guide groove.

[0008] As a preferred technical solution of this application, the cavity wall of the liquid chamber abuts against the outer end of the blade.

[0009] As a preferred technical solution of this application, the limiting groove is formed on the outer wall of the screw pump drive rod and is used for transmission between the screw pump and the brake.

[0010] As a preferred technical solution of this application, the strong spring is a compression spring, and its preload ensures that the outer end of the blade is always pressed against the inner wall of the liquid cavity.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: By using rollers and skewers in the unidirectional rotation component, the rotor is quickly locked when the screw pump drive rod reverses. In conjunction with the blades of the anti-torque component and the liquid chamber, the reverse energy is converted into liquid terminal pressure, and then into anti-torque torque. This effectively suppresses the reverse speed of the screw pump ground drive device, avoids safety accidents caused by violent reverse rotation, achieves soft energy release, and protects equipment and personnel safety. This solves the problem in the existing technology where the screw pump ground drive device violently reverses to release energy, which can easily cause major safety accidents such as personal injury and equipment damage. Attached Figure Description

[0012] Figure 1 A schematic diagram of the overall structure of a sliding vane hydraulic brake provided in this application; Figure 2 An exploded view of a sliding vane hydraulic brake provided in this application; Figure 3 A schematic diagram of the inner ring structure of a sliding vane hydraulic brake provided in this application; Figure 4 A schematic diagram of the internal structure of a rotor of a sliding vane hydraulic brake provided in this application; Figure 5 This application provides a schematic diagram of the liquid chamber structure of a sliding vane hydraulic brake.

[0013] The image shows: 1. Cylinder seat; 2. Cylinder block; 3. Cylinder head; 4. Bolt; 5. Tapered roller bearing; 6. Screw pump drive rod; 7. Inner ring; 8. Inclined groove; 9. Push rod; 10. Return spring; 11. Roller; 12. Rotor; 13. Guide groove; 14. Blade; 15. Strong spring; 16. Liquid chamber; 17. Limiting groove; 18. Limiting block A; 19. Limiting block B. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0015] like Figure 1-5 As shown, the sliding vane hydraulic brake proposed in this embodiment includes a cylinder seat 1, a cylinder body 2, and a cylinder head 3. The cylinder seat 1 is connected to the cylinder body 2 and the cylinder head 3 respectively by bolts 4. It also includes: Tapered roller bearing 5 is fixedly installed on the inner wall of cylinder seat 1 and cylinder head 3, and its inner ring is fixedly provided with a limiting block A18; The screw pump drive rod 6 has an axial limiting groove 17 on its outer wall, and the limiting block A18 is slidably fitted into the limiting groove 17. A one-way rotation assembly includes: Limiting block B19 is slidably connected to the inner wall of limiting groove 17; The inner ring 7 is fixed to the outer wall of the limiting block B19, and multiple inclined grooves 8 are evenly opened in the circumference; The return spring 10 and the push rod 9 are connected together. One end of the return spring 10 is fixed to the inner wall of the inclined groove 8, and the other end is connected to the push rod 9. Roller 11 is fixed to the outer wall of push rod 9 and abuts against the inner wall of inclined groove 8 and the inner wall of rotor 12; The liquid chamber 16 is located on the inner wall of the cylinder 2 and is filled with hydraulic oil. If the screw pump stops / power is cut off, the downhole sucker rod deforms elastically, the oil well liquid potential energy is released, and the drive device has a tendency to reverse, the screw pump drive rod 6 reverses, which drives the inner ring 7 to reverse. At this time, the roller 11 is in the inclined groove 8. Due to the friction generated by the reverse rotation of the inner ring 7 and the action of the return spring 10, it is wedged into the narrow end of the inclined groove 8, so that the inner ring 7 and the rotor 12 are locked. An anti-torque component is located on the outer wall of the inner ring 7, and the anti-torque component cooperates with the one-way rotation component. An anti-torque component is located on the outer wall of the inner ring 7, and the anti-torque component cooperates with the unidirectional rotation component.

[0016] like Figure 4 As shown, in a preferred embodiment, based on the above method, the anti-torque component further includes: Rotor 12 is rotatably connected to the outer wall of inner ring 7, and multiple guide grooves 13 are opened circumferentially on its inner wall; Blade 14 is slidably disposed within guide groove 13; A strong spring 15 is fixedly connected at both ends to the blade 14 and the inner wall of the guide groove 13. After the rotor 12 is locked, the screw pump reverses and drives the rotor 12 to attempt to rotate. The blade 14 in the guide groove 13 on the inner wall of the rotor 12 slides in the guide groove 13 due to the preload of the strong spring 15 and the liquid constraint in the liquid chamber 16. The blade 14 squeezes the liquid in the liquid chamber 16, and the liquid generates terminal pressure, which is converted into anti-torsional torque to resist the reverse torque of the screw pump, slowly release energy, and suppress the reverse speed.

[0017] like Figure 5 As shown, in a preferred embodiment, based on the above method, the wall of the liquid chamber 16 abuts against the outer end of the blade 14. Hydraulic oil is placed in the liquid chamber 16. The hydraulic oil has good fluidity and can respond quickly and generate pressure changes when the blade 14 moves and squeezes. When the screw pump reverses, it drives the rotor 12 to rotate. The blade 14 slides and squeezes the hydraulic oil in the guide groove 13. The hydraulic oil can efficiently transmit the force it receives, generate terminal pressure, and then convert it into anti-torsional torque to resist the reverse torque of the screw pump and realize the braking function.

[0018] like Figure 2 As shown, in a preferred embodiment, based on the above method, a limiting groove 17 is further formed on the outer wall of the screw pump drive rod 6 for transmission between the screw pump and the brake. The core function of the limiting groove 17 is to build a power transmission bridge between the screw pump and the brake. Through sliding cooperation with the limiting block A18 and the limiting block B19, the limiting groove 17 can realize the synchronous rotation of the screw pump drive rod 6, the tapered roller bearing 5, and the inner ring 7 in the one-way rotation assembly, ensuring that the forward rotation power or reverse rotation torque of the screw pump can be accurately transmitted to the key components inside the brake.

[0019] like Figure 3 As shown, in a preferred embodiment, based on the above method, the strong spring 15 is a compression spring, and its preload keeps the outer end of the blade 14 pressed against the inner wall of the liquid chamber 16. The blade 14 continuously squeezes and pushes the liquid in the liquid chamber 16 through the elastic storage of the strong spring 15. The liquid generates terminal pressure, which is converted into anti-torsional torque to resist the reverse torque of the screw pump, slowly release energy, and suppress the reverse speed.

[0020] Specifically, in use, this type of sliding vane hydraulic brake works as follows: When the screw pump ground drive unit is operating normally, the screw pump transmission rod 6 rotates, cooperating with the limiting block A18 and limiting block B19 through the limiting groove 17, driving the inner ring 7 to rotate. At this time, the return spring 10 and the push rod 9 in the inclined groove 8 of the inner ring 7 push the roller 11. Because the device rotates in the forward direction, the roller 11 abuts against the inner wall of the rotor 12 but is not locked. The unidirectional rotation component is in the "overrunning" state, which does not affect the normal drive of the screw pump. If the screw pump stops / is powered off, the downhole sucker rod elastically deforms, the oil well fluid potential energy is released, and the drive unit has a tendency to reverse, the screw pump... When the transmission rod 6 reverses, it drives the inner ring 7 to reverse as well. At this time, the roller 11 is wedged into the narrow end of the inclined groove 8 by the friction generated by the reverse rotation of the inner ring 7 and the action of the return spring 10, thus locking the inner ring 7 and the rotor 12. After the rotor 12 is locked, the screw pump reverses and drives the rotor 12 to attempt to rotate. The blades 14 in the guide groove 13 on the inner wall of the rotor 12 slide in the guide groove 13 due to the preload of the strong spring 15 and the liquid constraint in the liquid cavity 16. The blades 14 squeeze the liquid in the liquid cavity 16, and the liquid generates terminal pressure, which is converted into anti-torsional torque to resist the reverse torque of the screw pump, slowly release energy, and suppress the reverse rotation speed.

[0021] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A sliding vane type hydraulic brake, comprising a cylinder seat (1), a cylinder body (2), and a cylinder head (3), wherein the cylinder seat (1) is connected to the cylinder body (2) and the cylinder head (3) respectively by bolts (4), characterized in that, Also includes: A tapered roller bearing (5) is fixedly installed on the inner wall of the cylinder seat (1) and the cylinder head (3), and its inner ring is fixedly provided with a limiting block A (18). The screw pump drive rod (6) has an axial limiting groove (17) on its outer wall, and the limiting block A (18) is slidably fitted into the limiting groove (17); A one-way rotation assembly includes: Limiting block B (19) is slidably connected to the inner wall of limiting groove (17); The inner ring (7) is fixed to the outer wall of the limiting block B (19), and multiple inclined grooves (8) are evenly opened in the circumference. The return spring (10) and the push rod (9) are connected to each other. One end of the return spring (10) is fixed to the inner wall of the inclined groove (8), and the other end is connected to the push rod (9). Roller (11) is fixed to the outer wall of top rod (9) and abuts against the inner wall of inclined groove (8) and inner wall of rotor (12); A liquid chamber (16) is opened on the inner wall of the cylinder (2) and is filled with hydraulic oil; An anti-torque component is disposed on the outer wall of the inner ring (7), and the anti-torque component cooperates with the unidirectional rotation component.

2. The sliding vane hydraulic brake according to claim 1, characterized in that, The anti-torque component includes: The rotor (12) is rotatably connected to the outer wall of the inner ring (7), and multiple guide grooves (13) are opened circumferentially on its inner wall. The blade (14) is slidably disposed in the guide groove (13); A strong spring (15) is fixedly connected at both ends to the blade (14) and the inner wall of the guide groove (13).

3. A sliding vane hydraulic brake according to claim 1, characterized in that, The wall of the liquid cavity (16) abuts against the outer end of the blade (14).

4. A sliding vane hydraulic brake according to claim 2, characterized in that, The strong spring (15) is a compression spring, and its preload force keeps the outer end of the blade (14) pressed against the inner wall of the liquid cavity (16).

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