Liquid seal for a hydraulic retarder

Abstract

The utility model discloses a liquid sealing device of hydraulic retarder, include: retarder body, sealing assembly, oil tank, radiator, control valve, oil pump, oil pipe, lower oil pipe, reversing valve and delivery oil pipe, sealing assembly include: sealing shell, oil outlet pipe, oil inlet pipe, servo motor, threaded rod, guide rod, round sealing element and oil delivery pipe, sealing shell fixed mounting is on the one side outer wall of oil tank, servo motor fixed mounting is on the top inner wall of sealing shell. The utility model discloses can through temperature change, pressure fluctuation or mechanical vibration, the opening and closing size of automatic control sealing element, avoid sealing surface long -term contact or overload through the dynamic regulation sealing element. In the starting stage of hydraulic retarder, the initiative sealing can reduce the sealing force, and then increase the pressure after running smoothly, improve the service life of sealing element, and can ensure that oil always fills the working cavity, maintains the advantage that the braking torque is stably output.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic retarder technology, and specifically to a liquid sealing device for a hydraulic retarder. Background Technology

[0002] A hydraulic retarder is an auxiliary braking device for automobiles. It converts the kinetic energy of a car traveling at high speed into heat energy, thereby slowing down the car. The heat generated is dissipated through the car's engine cooling system, thus enabling the car to achieve the purpose of slowing down or maintaining a constant speed for a long time.

[0003] During operation, the working chamber of a hydraulic retarder is filled with oil. Existing hydraulic retarders often use passive sealing structures such as elastic sealing ring combinations or high-pressure oil seal designs. Passive sealing structures lack active adjustment capabilities, resulting in significant lag when the hydraulic retarder engages and disengages. Passive sealing structures are usually designed for fixed gear positions, so the braking torque cannot be continuously varied. Furthermore, high-speed friction raises the temperature of the sealing interface, accelerating the aging of elastic components such as oil seals, requiring additional cooling measures. Utility Model Content

[0004] The purpose of this invention is to provide a liquid sealing device for a hydraulic retarder. The ECU can automatically control the opening and closing of the seal through temperature changes, pressure fluctuations, or mechanical vibrations, and dynamically adjust the seal to avoid prolonged contact or overload of the sealing surface. During the start-up phase of the hydraulic retarder, active sealing reduces the sealing force, and pressure is increased only after operation stabilizes, thus improving the service life of the seal. Furthermore, it ensures that the working chamber is always filled with oil, maintaining a stable output of braking torque, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a liquid sealing device for a hydraulic retarder, characterized in that it comprises: a retarder body, a sealing assembly, an oil tank, a radiator, a control valve, an oil pump, an upper oil pipe, a lower oil pipe, a reversing valve, and a delivery oil pipe. The sealing assembly comprises: a sealing shell, an oil outlet pipe, an oil inlet pipe, a servo motor, a threaded rod, a guide rod, a circular seal, and an oil delivery pipe. The sealing shell is fixedly installed on one side of the outer wall of the oil tank. The servo motor is fixedly installed on the top inner wall of the sealing shell. The top end of the threaded rod is fixedly installed on the output shaft of the servo motor, and the bottom end of the threaded rod is rotatably connected to the sealing shell. The top end of the guide rod is fixedly installed on the top inner wall of the sealing shell, and the bottom end of the guide rod is fixedly connected to the bottom inner wall of the sealing shell. The circular seal is threadedly installed on the threaded rod, and the circular seal is slidably connected to the guide rod.

[0006] Furthermore, the oil outlet pipe is fixedly installed on the bottom outer wall of the sealing housing and extends into the sealing housing; the oil inlet pipe is fixedly installed on the top outer wall of the sealing housing and extends into the sealing housing; and the oil delivery pipe is fixedly installed on the bottom outer wall of the sealing housing.

[0007] Furthermore, the retarder body includes: a retarder housing, a gear, a drive shaft, a stator, and a rotor. The retarder housing is fixedly installed on one side of the outer wall of the oil tank. The retarder housing is fixedly connected to the bottom of the oil supply pipe. The gear is fixedly installed at the end of the drive shaft away from the oil tank. The drive shaft is rotatably installed on the retarder housing. The stator is fixedly installed on one side of the inner wall of the retarder housing. The rotor is fixedly installed at the end of the drive shaft near the oil tank.

[0008] Furthermore, the radiator is fixedly installed on one side of the outer wall of the oil tank, the control valve is fixedly installed at the top of the oil inlet pipe and is fixedly connected to one side of the outer wall of the oil tank, and the oil pump is fixedly installed on the bottom outer wall of the retarder housing and is fixedly connected to one side of the outer wall of the oil tank.

[0009] Furthermore, one end of the upper oil pipe is fixedly installed on the outer wall of the oil supply pipe, and the other end of the upper oil pipe is fixedly connected to the oil outlet of the radiator.

[0010] Furthermore, one end of the lower oil pipe is fixedly installed at the oil outlet of the oil pump, the other end of the lower oil pipe is fixedly connected to the oil inlet of the radiator, and the lower oil pipe is fixedly connected to the oil tank.

[0011] Furthermore, the reversing valve is fixedly installed on the lower oil pipe, the reversing valve is fixedly connected to the bottom inner wall of the oil tank, and the delivery oil pipe is fixedly installed on the oil inlet of the control valve.

[0012] In summary, due to the adoption of the above-mentioned technologies, the beneficial effects of this utility model are:

[0013] This invention, through the installation of a sealing assembly, allows the ECU to automatically control the opening and closing of the seal based on temperature changes, pressure fluctuations, or mechanical vibrations. This dynamic adjustment prevents prolonged contact or overload of the sealing surface. During the hydraulic retarder's startup phase, the active seal reduces the sealing force; pressure is then increased after operation stabilizes, thus extending the seal's lifespan.

[0014] This invention, by setting up an oil pump, accelerates the circulation of hydraulic oil, which can quickly dissipate heat into the environment, avoid excessive oil temperature leading to brake torque attenuation, shorten the thermal equilibrium time, and enable the retarder to reach maximum braking power in a short time. Attached Figure Description

[0015] Figure 1This is a three-dimensional structural diagram of a liquid sealing device for a hydraulic retarder according to the present invention;

[0016] Figure 2 This is a side sectional view of the liquid sealing device of a hydraulic retarder according to the present invention.

[0017] Figure 3 This utility model Figure 2 A magnified structural diagram of part A in the middle;

[0018] Figure 4 This is a side sectional view of the retarder body of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the circular sealing element of this utility model;

[0020] Figure 6 This is a schematic diagram of the assembly structure of the retarder body and sealing assembly of this utility model.

[0021] In the diagram: 1. Retarder body; 101. Retarder housing; 102. Gear; 103. Drive shaft; 104. Stator; 105. Rotor; 2. Sealing assembly; 201. Sealing shell; 202. Oil outlet pipe; 203. Oil inlet pipe; 204. Servo motor; 205. Threaded rod; 206. Guide rod; 207. Circular seal; 208. Oil delivery pipe; 3. Oil tank; 4. Radiator; 5. Control valve; 6. Oil pump; 7. Upper oil pipe; 8. Lower oil pipe; 9. Reversing valve; 10. Delivery oil pipe. Detailed Implementation

[0022] 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 a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] This utility model provides, for example Figure 1-6As shown, a liquid sealing device for a hydraulic retarder includes: a retarder body 1, a sealing assembly 2, an oil tank 3, a radiator 4, a control valve 5, an oil pump 6, an upper oil pipe 7, a lower oil pipe 8, a reversing valve 9, and a delivery oil pipe 10. The sealing assembly 2 includes: a sealing shell 201, an oil outlet pipe 202, an oil inlet pipe 203, a servo motor 204, a threaded rod 205, a guide rod 206, a circular seal 207, and an oil delivery pipe 208. The sealing shell 201 is fixedly installed on one side of the outer wall of the oil tank 3, and the servo motor 204 is fixedly installed on the top inner wall of the sealing shell 201. The threaded rod 205... The top end of the threaded rod 205 is fixedly installed on the output shaft of the servo motor 204. The bottom end of the threaded rod 205 is rotatably connected to the sealing housing 201. The top end of the guide rod 206 is fixedly installed on the top inner wall of the sealing housing 201. The bottom end of the guide rod 206 is fixedly connected to the bottom inner wall of the sealing housing 201. The circular seal 207 is threadedly installed on the threaded rod 205. The circular seal 207 is slidably connected to the guide rod 206. The servo motor 202 is model SF80H220V and is suitable for high-temperature and heavy-load working environments. Both the upper and lower ends of the circular seal 207 are provided with sealing rubber gaskets.

[0024] In addition, the oil outlet pipe 202 is fixedly installed on the bottom outer wall of the sealing housing 201 and extends into the sealing housing 201. The oil inlet pipe 203 is fixedly installed on the top outer wall of the sealing housing 201 and extends into the sealing housing 201. The oil delivery pipe 208 is fixedly installed on the bottom outer wall of the sealing housing 201.

[0025] In addition, the retarder body 1 includes: a retarder housing 101, a gear 102, a drive shaft 103, a stator 104, and a rotor 105. The retarder housing 101 is fixedly installed on one side of the outer wall of the oil tank 3. The retarder housing 101 is fixedly connected to the bottom of the oil supply pipe 208. The gear 102 is fixedly installed at the end of the drive shaft 103 away from the oil tank 3. The drive shaft 103 is rotatably installed on the retarder housing 101. The stator 104 is fixedly installed on one side of the inner wall of the retarder housing 101. The rotor 105 is fixedly installed at the end of the drive shaft 103 near the oil tank 3. A high-pressure oil seal is installed on the outside of the retarder housing 101 to provide auxiliary sealing.

[0026] In addition, the radiator 4 is fixedly installed on one side of the outer wall of the oil tank 3, the control valve 5 is fixedly installed at the top of the oil inlet pipe 203 and is fixedly connected to one side of the outer wall of the oil tank 3, the oil pump 6 is fixedly installed on the bottom outer wall of the retarder housing 101 and is fixedly connected to one side of the outer wall of the oil tank 3, the radiator 4 is model WG9719530270, which can meet the heat dissipation requirements of the retarder body 1 during operation, and the control valve 5 is model Burocco803, which is connected to the vehicle air compressor and is suitable for industrial vehicles or heavy trucks that require high temperature resistance and corrosion resistance.

[0027] In addition, one end of the upper oil pipe 7 is fixedly installed on the outer wall of the oil supply pipe 208, and the other end of the upper oil pipe 7 is fixedly connected to the oil outlet of the radiator 4.

[0028] In addition, one end of the lower oil pipe 8 is fixedly installed at the oil outlet of the oil pump 6, and the other end of the lower oil pipe 8 is fixedly connected to the oil inlet of the radiator 4. The lower oil pipe 8 is fixedly connected to the oil tank 3. The model of the oil pump 6 is QSK23. Both the upper oil pipe 7 and the lower oil pipe 8 are high-pressure oil pipes made of alloy steel 42CrMo. By adding elements such as chromium and molybdenum, the strength, hardness and heat resistance are improved, and the fatigue resistance is excellent.

[0029] In addition, the reversing valve 9 is fixedly installed on the lower oil pipe 8 and is fixedly connected to the bottom inner wall of the oil tank 3. The delivery oil pipe 10 is fixedly installed on the oil inlet of the control valve 5. The model of the reversing valve 9 is DG4V3, which can change the flow direction of hydraulic oil. In an emergency, the reversing valve 9 can quickly cut off the fluid supply.

[0030] Working principle:

[0031] Step 1: When the retarder is working, the ECU starts the servo motor 204 and control valve 5. The rotation of the threaded rod 5 causes the circular seal 207 to move downwards. The hydraulic oil in the oil tank 3 enters the sealing housing 201 through the delivery oil pipe 10, control valve 5, and inlet oil pipe 203. It then enters the retarder housing 101 through the outlet oil pipe 202 and the delivery oil pipe 208, following the high-speed rotation of the rotor 105. The oil pump 6 pumps the high-temperature hydraulic oil through the lower oil pipe 8 into the reversing valve 9. The reversing valve 9 controls the flow of the oil to the radiator 4. After cooling, the oil flows through the upper oil pipe 7 and into the delivery oil pipe 208, re-entering the retarder housing 101. This cycle continues. After a certain amount of hydraulic oil enters the retarder housing 101, the ECU starts the servo motor 204. The rotation of the threaded rod 5 causes the circular seal 207 to move downwards and completely contact the top of the outlet oil pipe 202. The circulating hydraulic oil is completely isolated from the control valve 5, preventing compressed air from entering the retarder housing 101.

[0032] Step 2: When the retarder stops working, the ECU starts the servo motor 204, control valve 5 and reversing valve 9. At this time, the reversing valve 9 is connected to the oil tank 3. The oil pump 6 pumps the hydraulic oil in the retarder housing 101 into the reversing valve 9 through the lower oil pipe 8. The reversing valve 9 controls the hydraulic fluid to flow back into the oil tank 3. The threaded rod 5 rotates, causing the circular seal 207 to move down. The control valve 5 draws in the remaining oil and gas in the retarder housing 101. When the retarder housing 101 is in a vacuum, the threaded rod 5 rotates, causing the circular seal 207 to move down and completely fit the bottom end of the oil inlet pipe 203. The reversing valve 9 is in the closed state to prevent hydraulic oil from entering the retarder housing 101.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A liquid sealing device for a hydraulic retarder, characterized in that, include: The retarder body (1), sealing assembly (2), oil tank (3), radiator (4), control valve (5), oil pump (6), upper oil pipe (7), lower oil pipe (8), reversing valve (9), and delivery oil pipe (10) are included. The sealing assembly (2) includes: sealing shell (201), oil outlet pipe (202), oil inlet pipe (203), servo motor (204), threaded rod (205), guide rod (206), circular seal (207), and delivery oil pipe (208). The sealing shell (201) is fixedly installed on one side of the outer wall of the oil tank (3). The servo motor (204) is fixedly installed on the outer wall of the oil tank (3). 4) The threaded rod (205) is fixedly installed on the top inner wall of the sealing shell (201). The top end of the threaded rod (205) is fixedly installed on the output shaft of the servo motor (204). The bottom end of the threaded rod (205) is rotatably connected to the sealing shell (201). The top end of the guide rod (206) is fixedly installed on the top inner wall of the sealing shell (201). The bottom end of the guide rod (206) is fixedly connected to the bottom inner wall of the sealing shell (201). The circular seal (207) is threadedly installed on the threaded rod (205). The circular seal (207) is slidably connected to the guide rod (206).

2. The liquid sealing device for a hydraulic retarder according to claim 1, characterized in that: The oil outlet pipe (202) is fixedly installed on the bottom outer wall of the sealing shell (201) and extends into the sealing shell (201). The oil inlet pipe (203) is fixedly installed on the top outer wall of the sealing shell (201) and extends into the sealing shell (201). The oil delivery pipe (208) is fixedly installed on the bottom outer wall of the sealing shell (201).

3. The liquid sealing device for a hydraulic retarder according to claim 1, characterized in that: The retarder body (1) includes: a retarder housing (101), a gear (102), a drive shaft (103), a stator (104), and a rotor (105). The retarder housing (101) is fixedly installed on one side of the outer wall of the oil tank (3). The retarder housing (101) is fixedly connected to the bottom of the oil supply pipe (208). The gear (102) is fixedly installed on the end of the drive shaft (103) away from the oil tank (3). The drive shaft (103) is rotatably installed on the retarder housing (101). The stator (104) is fixedly installed on one side of the inner wall of the retarder housing (101). The rotor (105) is fixedly installed on the end of the drive shaft (103) near the oil tank (3).

4. The liquid sealing device for a hydraulic retarder according to claim 3, characterized in that: The radiator (4) is fixedly installed on one side of the outer wall of the oil tank (3), the control valve (5) is fixedly installed at the top of the oil inlet pipe (203), the control valve (5) is fixedly connected to one side of the outer wall of the oil tank (3), the oil pump (6) is fixedly installed at the bottom of the retarder housing (101), and the oil pump (6) is fixedly connected to one side of the outer wall of the oil tank (3).

5. The liquid sealing device for a hydraulic retarder according to claim 1, characterized in that: One end of the upper oil pipe (7) is fixedly installed on the outer wall of the oil supply pipe (208), and the other end of the upper oil pipe (7) is fixedly connected to the oil outlet of the radiator (4).

6. The liquid sealing device for a hydraulic retarder according to claim 1, characterized in that: One end of the lower oil pipe (8) is fixedly installed at the oil outlet of the oil pump (6), the other end of the lower oil pipe (8) is fixedly connected to the oil inlet of the radiator (4), and the lower oil pipe (8) is fixedly connected to the oil tank (3).

7. The liquid sealing device for a hydraulic retarder according to claim 1, characterized in that: The reversing valve (9) is fixedly installed on the lower oil pipe (8), and the reversing valve (9) is fixedly connected to the bottom inner wall of the oil tank (3). The delivery oil pipe (10) is fixedly installed on the oil inlet of the control valve (5).

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