Hydraulic buffer brake

Abstract

The utility model discloses a hydraulic buffer brake which is arranged in a cavity below a bearing box, brake fluid is filled in the cavity below the bearing box, the hydraulic buffer brake is immersed in the brake fluid, and the hydraulic buffer brake is sleeved on a driving main shaft. The hydraulic buffer brake comprises a roller type overrun clutch, an overrun clutch sealing sleeve, a fixed wheel and a rotating wheel, the roller type overrun clutch is connected with the overrun clutch sealing sleeve, the overrun clutch sealing sleeve is connected with the rotating wheel, the rotating wheel is connected with the fixed wheel, and the driving main shaft is coaxially connected with the roller type overrun clutch. According to the hydraulic buffer brake, kinetic energy generated by reverse torque is converted into heat energy, and the heat energy is released out of the cavity, so that the kinetic energy generated by the reverse torque for driving the main shaft is eliminated, energy conservation in the cavity is guaranteed, and the running stability of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underground oil production, and more specifically to a hydraulic buffer brake. Background Art

[0002] The connection method between the downhole screw pump and the ground drive device is that the screw pump is connected to the sucker rod, and the sucker rod is connected to the light rod. The light rod is set inside the driving main shaft and rotates with the main shaft. During the oil production process, the slender sucker rod that transmits power accumulates a high reverse elastic energy. When the pump is shut down or stuck, this reverse energy is released, which will cause the driving main shaft to reverse at high speed, which is very likely to cause damage to the transmission device or personal accidents, or cause the sucker rod connection thread to loosen and fall into the well, resulting in an oil well shutdown accident. Therefore, a brake device must be installed.

[0003] In the prior art, most mechanical brake devices are used to drive the spindle in reverse. When the spindle is driven in reverse, the brake is braked by clamping the brake disc. This braking method requires the brake device to withstand the kinetic energy generated by the increased reverse torque, which can easily cause the brake device to wear and affect the braking effect, thereby affecting the stability of the equipment. Therefore, how to eliminate the reverse torque during the braking process and improve the stability of the equipment operation has become a problem that technicians in this field need to solve urgently. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic buffer brake, which converts the kinetic energy generated by the reverse torque into heat energy and releases the heat energy out of the chamber, thereby not only eliminating the kinetic energy generated by the reverse torque of the driving spindle, but also ensuring the conservation of energy in the chamber and improving the operating stability of the equipment.

[0005] To achieve the above-mentioned purpose, the utility model provides a hydraulic buffer brake, which is arranged in a chamber below the bearing box, the chamber below the bearing box is filled with brake fluid, the hydraulic buffer brake is immersed in the brake fluid, the hydraulic buffer brake is sleeved on the driving main shaft, the hydraulic buffer brake includes a fixed wheel, a rotating wheel, a roller type overrunning clutch arranged on the driving main shaft, and an overrunning clutch sealing sleeve sleeved on the outside of the roller type overrunning clutch, wherein the rotating wheel is fixed to the overrunning clutch sealing sleeve, and the rotating wheel is connected to the driving main shaft through the roller type overrunning clutch.

[0006] Preferably, the rotating wheel is arranged above the overrunning clutch sealing sleeve, and the overrunning clutch sealing sleeve is connected to the rotating wheel by bolts.

[0007] Preferably, the overrunning clutch sealing sleeve, the rotating wheel and the roller overrunning clutch are an integrated structure.

[0008] Preferably, the overrunning clutch sealing sleeve is outer-coated with a first thrust ball bearing.

[0009] Preferably, the rotating wheel is arranged below the stator wheel, and the stator wheel is connected to the upper part of the chamber by bolts.

[0010] Preferably, it also includes a fluid dynamic brake housing, which is sleeved on the outside of the fixed wheel and the rotating wheel.

[0011] Preferably, it further comprises a second thrust ball bearing which is sleeved on the driving main shaft, and the second thrust ball bearing is located between the fixed wheel and the rotating wheel.

[0012] Preferably, a locking nut is connected below the roller overrunning clutch, and a bolt is arranged inside the locking nut.

[0013] Preferably, a filter tank is connected above the stator wheel.

[0014] In the technical solution provided by the utility model, the hydraulic buffer brake is arranged in the chamber below the bearing box, the chamber is provided with brake fluid, the hydraulic buffer brake is immersed in the brake fluid, and the hydraulic buffer brake is sleeved on the driving main shaft. The hydraulic buffer brake includes a roller-type overrunning clutch, an overrunning clutch sealing sleeve, a fixed wheel, and a rotating wheel. The roller-type overrunning clutch is arranged on the driving main shaft, the overrunning clutch sealing sleeve is sleeved on the outside of the roller-type overrunning clutch, and the overrunning clutch sealing sleeve is fixed to the rotating wheel to seal the internal hydraulic cavity to prevent liquid leakage. The fixed wheel is connected to the top of the rotating wheel, and the fixed wheel is connected to the upper part of the chamber by bolts. The rotating wheel is connected to the driving spindle through a roller overrunning clutch. When the driving spindle reverses, the roller overrunning clutch reverses accordingly, and the roller overrunning clutch drives the rotating wheel to rotate. The brake fluid is pushed by the rotating wheel, and a backflow and vortex are generated in the chamber. When the brake fluid contacts the fixed wheel, an increased resistance is generated, which increases the temperature of the brake fluid, and the kinetic energy generated by the reverse torque is stored in the brake fluid, so that the reverse torque is released. At the same time, a part of the brake fluid will be discharged from the chamber through the filter tank on the top of the rotating wheel, and new fluid will be replenished at the same time. In this cycle, the heat energy of the brake fluid is dissipated, and energy conservation in the chamber is realized. A fluid dynamic brake shell is arranged outside the fixed wheel and the rotating wheel to protect the rotating wheel and the fixed wheel. A locking nut is arranged on the lower side wall of the roller overrunning clutch, and a bolt is connected to the locking nut to press the roller overrunning clutch for fixing. The overrunning clutch sealing sleeve is provided with a first thrust ball bearing, and the second thrust ball bearing is located between the fixed wheel and the rotating wheel, and is sleeved on the driving main shaft, and can withstand the axial thrust of the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A cross-sectional view of a hydraulic buffer brake in an embodiment of the utility model;

[0017] Figure 1 middle:

[0018] 1. Fluid dynamic brake housing; 2. Rotating wheel; 3. Fixed wheel; 4. First thrust ball bearing; 5. Overrunning clutch sealing sleeve; 6. Roller overrunning clutch; 7. Second thrust ball bearing; 8. Locking nut. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0020] The purpose of this specific embodiment is to provide a hydraulic buffer brake, which converts the kinetic energy generated by the reverse torque into heat energy and releases the heat energy out of the chamber, thereby not only eliminating the kinetic energy generated by the reverse torque of the driving spindle, but also ensuring the conservation of energy in the chamber and improving the operating stability of the equipment.

[0021] The following embodiments are described in detail with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to the solutions required for the utility model described in the claims.

[0022] Please refer to the attached Figure 1The embodiment provides a hydraulic buffer brake, wherein the hydraulic buffer brake is arranged in a chamber, wherein brake fluid is arranged in the chamber, the hydraulic buffer brake is immersed in the brake fluid, and the hydraulic buffer brake is sleeved on the driving spindle. The hydraulic buffer brake comprises a fixed wheel 3, a rotating wheel 2, a roller-type overrunning clutch 6 arranged on the driving spindle, and an overrunning clutch sealing sleeve 5 sleeved on the outside of the roller-type overrunning clutch 6. The rotating wheel 2 is fixed to the overrunning clutch sealing sleeve 5. The rotating wheel 2 is connected to the driving spindle through the roller-type overrunning clutch. The fixed wheel 3 is connected below the rotating wheel 2, and the fixed wheel 3 is fixed to the upper part of the chamber. When the driving spindle is reversed, the roller-type overrunning clutch 6 rotates with the driving spindle, and the roller-type overrunning clutch 6 drives the rotating wheel 2 to rotate. The rotating wheel 2 pushes the brake fluid, causing the brake fluid to generate backflow and vortex. When the brake fluid contacts the fixed wheel 3, increased resistance is generated, causing the brake fluid temperature to rise, and the kinetic energy generated by the reverse torque is stored in the brake fluid, thereby realizing the release of the reverse torque. At the same time, part of the brake fluid will be discharged from the brake chamber through the filter tank on the upper part of the fixed wheel, and new brake fluid will be replenished in, and the cycle will continue, causing the heat energy of the brake fluid to dissipate.

[0023] When the drive device operates normally, the brake fluid in the chamber is in a stable state.

[0024] When the driving device is reversed, the runner 2 is arranged above the overrunning clutch sealing sleeve 5, and the overrunning clutch sealing sleeve 5 is fixed to the runner 2 by bolts. The overrunning clutch sealing sleeve 5 is sleeved on the outside of the roller overrunning clutch 6, sealing the internal cavity of the hydraulic buffer brake to prevent liquid leakage. The overrunning clutch sealing sleeve 5 and the runner 2 and the roller overrunning clutch 5 are an integrated structure, which is convenient for driving the runner 2 to rotate when the driving spindle is reversed. The upper part of the runner 2 is connected to the fixed wheel 3, and the runner 2 pushes the brake fluid to generate backflow and vortex. When the brake fluid contacts the fixed wheel 3, it generates increased resistance, which increases the temperature of the brake fluid, stores the kinetic energy generated by the reverse torque in the brake fluid, and realizes the release of the reverse torque.

[0025] The overrunning clutch sealing sleeve 5 is provided with a first thrust ball bearing 4. A second thrust ball bearing 7 is provided between the fixed wheel 3 and the rotating wheel 2. The design of the first thrust ball bearing 4 and the second thrust ball bearing 7 can withstand the axial thrust of the liquid, thereby enhancing the stability of the hydraulic buffer brake. The inner side of the fixed wheel 3 is connected to the driving spindle, and the fixed wheel 3 and the driving spindle are rotatably connected. Such a design can ensure that the normal operation of the driving spindle is not affected by the fixed wheel.

[0026] The rotating wheel 2 is connected to a fixed wheel 3 above, and the fixed wheel 3 is connected to the upper part of the chamber by bolts. The fixed wheel 3 has a fixing function on the one hand and a resistance increasing function on the other hand.

[0027] In order to protect the internal components, the hydraulic buffer brake also includes a fluid dynamic brake shell 1, which is sleeved on the outside of the fixed wheel 3 and the rotating wheel 2. The rotating wheel 2 is fixed to the overrunning clutch sealing sleeve 5. The overrunning clutch sealing sleeve 5 is sleeved on the outside of the roller overrunning clutch 6. The overrunning clutch sealing sleeve 5 is outerly provided with a first thrust ball bearing 4. A second thrust ball bearing 7 is connected between the fixed wheel 3 and the rotating wheel 2. The second thrust ball bearing 7 is sleeved on the driving spindle.

[0028] A locking nut 8 is connected below the roller overrunning clutch 6 , and a bolt is arranged inside the locking nut 8 for limiting the roller overrunning clutch 6 .

[0029] A filter tank is connected above the fixed wheel 3 to discharge and add brake fluid in the chamber regularly to reduce the temperature in the chamber and achieve energy conservation in the chamber.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic buffer brake, characterized in that: The hydraulic buffer brake is arranged in a chamber below the bearing box, the chamber is filled with brake fluid, the hydraulic buffer brake is immersed in the brake fluid, and the hydraulic buffer brake is sleeved on the driving spindle; The hydraulic buffer brake comprises: Rotating wheel (2); Fixed wheel (3); A roller-type overrunning clutch (6) arranged on the driving main shaft; An overrunning clutch sealing sleeve (5) sleeved on the outside of the roller overrunning clutch (6); The rotating wheel (2) is fixed to the overrunning clutch sealing sleeve (5), and is connected to the driving main shaft via the roller overrunning clutch (6).

2. The hydraulic buffer brake according to claim 1, characterized in that: The rotating wheel (2) is arranged above the overrunning clutch sealing sleeve (5), and the overrunning clutch sealing sleeve (5) is connected to the rotating wheel (2) via bolts.

3. The hydraulic buffer brake according to claim 2, characterized in that: The overrunning clutch sealing sleeve (5), the rotating wheel (2) and the roller overrunning clutch (6) are an integrated structure.

4. The hydraulic buffer brake according to claim 3, characterized in that: The overrunning clutch sealing sleeve (5) is provided with a first thrust ball bearing (4) on its outer sleeve.

5. The hydraulic buffer brake according to claim 2, characterized in that: The rotating wheel (2) is arranged below the fixed wheel (3), and the fixed wheel (3) is connected to the upper part of the chamber by bolts.

6. The hydraulic buffer brake according to claim 5, characterized in that: It also comprises a fluid dynamic brake housing (1), which is sleeved on the outside of the fixed wheel (3) and the rotating wheel (2).

7. The hydraulic buffer brake according to claim 6, characterized in that: It also comprises a second thrust ball bearing (7), which is sleeved on the driving main shaft; the second thrust ball bearing (7) is located between the fixed wheel (3) and the rotating wheel (2).

8. The hydraulic buffer brake according to claim 3, characterized in that: A locking nut (8) is connected below the roller-type overrunning clutch (6), and a bolt is arranged inside the locking nut (8).

9. The hydraulic buffer brake according to claim 5, characterized in that: A filter tank is connected above the fixed wheel (3).

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