Hydraulic retarder with adjustable rotor position

Abstract

The utility model relates to the technical field of hydraulic retarders, in particular to a hydraulic retarder with an adjustable rotor position. The hydraulic retarder comprises a shell, an input shaft is rotationally connected to the shell, a rotor is connected with the input shaft through a non-self-locking spiral spline, and a separation spring is installed between the rotor and the input shaft. By means of the non-self-locking spiral spline opposite to the rotation direction of the input shaft, the rotor can axially move along the input shaft so as to be close to the stator, after the rotor is close to the stator, a cavity where hydraulic oil rotates is shrunk, and therefore the impact force of the hydraulic oil on rotor blades can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic retarders, and in particular to a hydraulic retarder with adjustable rotor position. Background Art

[0002] In the field, the existing hydraulic retarder includes a housing, an input shaft is rotatably connected to the housing, a rotor is fixedly mounted on the input shaft, and a stator is mounted in the housing. When hydraulic oil is injected between the rotor and the stator, resistance is generated between the rotor and the stator, reducing the rotation speed of the rotor and the input shaft.

[0003] The above technical solution has the following disadvantages: the distance between the rotor and the stator is fixed and cannot be adjusted, and the resistance between the rotor and the stator cannot be adjusted by adjusting the distance between the rotor and the stator. Utility Model Content

[0004] The utility model aims to provide a hydraulic retarder with adjustable rotor position in view of the above problems, and the rotor position is adjusted by a non-self-locking helical spline.

[0005] To achieve the above object, the utility model discloses a hydraulic retarder with adjustable rotor position, which includes a housing, an input shaft rotatably connected to the housing, the rotor and the input shaft are connected via a non-self-locking spiral spline, and a separation spring is installed between the rotor and the input shaft.

[0006] During use, once a speed difference occurs between the input shaft and the rotor, the rotor will produce axial movement along the input shaft. When the hydraulic oil is not injected between the rotor and the stator, the rotor and the stator are supported by a separation spring. The friction force generated by the separation spring connects the rotor and the input shaft as a whole and keeps the speed synchronous. The separation spring separates the rotor and the stator. At this time, the loss control is very small. When the hydraulic oil is injected between the rotor and the stator, since the rotation direction of the non-self-locking spline is required to be opposite to the rotation direction of the input shaft, and the direction of the retarding blade on the rotor is opposite to the rotation direction of the input shaft, the hydraulic oil will impact the retarding blade on the rotor in the opposite direction. The hydraulic oil hinders the rotation of the rotor, but does not hinder the rotation of the input shaft. Therefore, a speed difference is generated between the rotor and the input shaft, that is, the power produces a rotation opposite to the input shaft relative to the input shaft. Relying on the non-self-locking helical spline opposite to the input shaft, the rotor will move axially along the input shaft and approach the stator. After the rotor approaches the stator, the cavity where the hydraulic oil rotates is reduced, so the impact force of the hydraulic oil on the rotor blades will increase, which will cause the rotor to further overcome the separation spring and approach the stator until it reaches the limit.

[0007] Preferably, a stator is installed in the shell, a side of the shell away from the stator is connected to the brake oil cooling inlet of the heat exchanger, a side of the shell away from the rotor is connected to the brake oil cooling outlet of the heat exchanger, a working chamber is provided between the stator and the rotor, an oil inlet pipeline penetrating the stator and connected to the working chamber is provided on the stator, and an oil outlet pipeline penetrating the rotor and connected to the working chamber is provided on the rotor.

[0008] When in use, the hydraulic oil enters the working chamber through the oil inlet pipeline, and then enters the back of the rotor through the oil outlet pipeline.

[0009] Preferably, the rotor is also provided with an oil outlet buffer hole which passes through the rotor and is connected with the working chamber.

[0010] During operation, the rotor approaches the stator, and the high-pressure oil forms a high-pressure buffer chamber on the back of the rotor through the oil outlet buffer hole. After the hydraulic retarder releases the oil and stops braking, the rotor returns away from the stator under the action of the separation spring. The high-pressure oil in this high-pressure buffer chamber will provide kinetic energy to buffer the rotor's return, causing the rotor to return slowly and reducing the impact between the rotor and the casing.

[0011] Preferably, an oil seal is installed between the input shaft and the housing, an oil seal sleeve is sleeved on the input shaft, and an oil seal ring is installed between the oil seal sleeve and the input shaft.

[0012] The oil seal ring is arranged between the oil seal and the high-pressure buffer chamber of the hydraulic retarder, which can protect the oil seal from the impact of the high-pressure oil. At the same time, the oil seal ring is made of PEEK material, which has a very small friction coefficient and can meet the high-speed rotation requirements of the input shaft.

[0013] Preferably, an input shaft oil passage communicating with the interior of the oil seal sleeve is provided on the input shaft, a fixing bolt is installed at the end of the input shaft oil passage, a fixing bolt oil passage is provided on the fixing bolt, and the end of the fixing bolt oil passage is blocked by a fixing gasket.

[0014] An input shaft oil channel is provided on the input shaft, which plays a role in unloading the high-pressure impact of the oil seal. The entire oil circuit is connected from the high-pressure area of ​​the oil seal to the low-pressure area of ​​the oil inlet chamber. One section of the oil chamber is connected to the oil inlet chamber of the oil seal. The oil chamber can store a certain amount of lubricating oil. When the hydraulic retarder is not working, it plays a role in lubricating the oil seal. At the same time, when the hydraulic retarder just starts to fill with oil, when the high-pressure oil enters the front end of the oil seal in the high-pressure chamber, it will cause a high-pressure impact on the oil seal. The input shaft oil channel will play a role in pressure relief, which is equivalent to a pressure limiting valve.

[0015] Preferably, a spring seat is installed on the input shaft, one end of the separation spring abuts against the spring seat, and the other end of the separation spring abuts against the rotor.

[0016] When in use, it is convenient to install the separation spring.

[0017] Preferably, the stator is in the shape of a ring, the outer side of the stator is connected to the outer shell, the rotor is in the shape of a ring, a rotor mounting tube matching the input shaft is installed on the inner side of the rotor, the rotor mounting tube passes through the stator, and a high-pressure chamber sealing ring is installed between the stator and the rotor mounting tube.

[0018] A high-pressure chamber sealing ring made of PEEK is used to form a seal between the high-pressure chamber and the low-pressure chamber to prevent the high-pressure chamber brake oil from flowing into the low-pressure chamber from the gap between the rotor and the stator. After closing this channel, the engine oil in the high-pressure chamber can only enter the heat exchanger from the external cooling channel for cooling and then re-enter the low-pressure chamber, solving the problem of high-temperature engine oil flowing back to the low-temperature engine oil chamber.

[0019] Preferably, the housing comprises a rotor fixing seat and a stator fixing seat, and a sealing O-ring is placed between the rotor fixing seat YU1 and the stator fixing seat.

[0020] This structure is convenient for processing and manufacturing.

[0021] In summary, the beneficial effect of the utility model is that: relying on the non-self-locking helical spline in the opposite direction of rotation of the input shaft, the rotor will move axially along the input shaft and approach the stator. After the rotor approaches the stator, the cavity in which the hydraulic oil rotates will shrink, so the impact force of the hydraulic oil on the rotor blades will increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a hydraulic retarder with adjustable rotor position according to the utility model;

[0023] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A in the figure.

[0024] In the figure: 1. stator; 2. rotor fixing seat; 3. input shaft; 4. input gear; 5. rotor; 6. working chamber; 7. spring seat; 8. separation spring; 9. high-pressure chamber; 10. low-pressure chamber; 11. high-pressure chamber sealing ring; 12. input shaft oil channel; 13. fixing bolt; 14. fixing bolt oil channel; 15. oil seal; 16. oil seal sleeve; 17. oil seal ring; 18. heat exchanger; 19. coolant inlet; 20. coolant outlet; 21. brake oil cooling inlet; 22. brake oil cooling outlet; 23. oil inlet pipeline; 24. oil outlet pipeline; 25. oil outlet buffer hole; 26. stator fixing seat; 27. fixing gasket; 28. rotor mounting tube; 29. ​​sealing O-ring; 30. high-pressure chamber buffer chamber. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0030] like Figures 1 to 2 As shown, a hydraulic retarder with adjustable rotor position includes a housing, an input shaft 3 is rotatably connected to the housing, a stator 1 is installed in the housing, a rotor 5 is connected to the input shaft 3 through a non-self-locking spiral spline, and a separation spring 8 is installed between the rotor 5 and the input shaft 3. Specifically, an input gear 4 is installed on the input shaft 3.

[0031] When in use, once there is a speed difference between the input shaft 3 and the rotor 5, the rotor 5 will produce axial movement along the input shaft 3. When the hydraulic oil is not injected between the rotor 5 and the stator 1, the rotor 5 and the stator 1 are supported by a separation spring 8. The friction force generated by the separation spring 8 makes the rotor 5 and the input shaft 3 connected as a whole to keep the speed synchronized. The separation spring 8 separates the rotor 5 from the stator 1, and the control loss is very small at this time; when the hydraulic oil is injected between the rotor 5 and the stator 1, since the rotation direction of the non-self-locking spline is required to be opposite to the rotation direction of the input shaft 3, and the direction of the retarding blade on the rotor 5 is opposite to the rotation direction of the input shaft 3, the hydraulic oil It will impact the retarding blades on the rotor 5 in the reverse direction. The hydraulic oil hinders the rotation of the rotor 5, but does not hinder the rotation of the input shaft 3. Therefore, a speed difference is generated between the rotor 5 and the input shaft 3, that is, the power generates a rotation relative to the input shaft 3 in the opposite direction of the rotation of the input shaft 3. Relying on the non-self-locking helical spline in the opposite direction of the rotation of the input shaft 3, the rotor 5 will move axially along the input shaft 3 and approach the stator 1. After the rotor 5 approaches the stator 1, the cavity in which the hydraulic oil rotates is reduced. Therefore, the impact force of the hydraulic oil on the rotor 5 blades will increase, which will cause the rotor 5 to further overcome the separation spring 8 and approach the stator 1 until it reaches the limit.

[0032] The side of the housing away from the stator 1 is connected to the brake oil cooling inlet 21 of the heat exchanger 18, and the side of the housing away from the rotor 5 is connected to the brake oil cooling outlet 22 of the heat exchanger 18. There is a working chamber 6 between the stator 1 and the rotor 5. The stator 1 is provided with an oil inlet pipeline 23 that passes through the stator 1 and is connected to the working chamber 6. The rotor 5 is provided with an oil outlet pipeline 24 that passes through the rotor 5 and is connected to the working chamber 6. Specifically, the oil inlet pipeline 23 is arranged along the axial direction of the stator 1, and the oil outlet pipeline 24 is arranged obliquely. The heat exchanger 18 is provided with a coolant inlet 19 and a coolant outlet 20.

[0033] When in use, the hydraulic oil enters the working chamber 6 through the oil inlet pipeline 23 , and then enters the back side of the rotor 5 through the oil outlet pipeline 24 .

[0034] The rotor 5 is also provided with an oil outlet buffer hole 25 which penetrates the rotor 5 and communicates with the working chamber 6 .

[0035] During operation, the rotor 5 approaches the stator 1, and the high-pressure oil forms a high-pressure buffer chamber 30 on the back of the rotor 5 through the oil outlet buffer hole 25. After the hydraulic retarder releases oil and stops braking, the rotor 5 returns away from the stator 1 under the action of the separation spring 8. The high-pressure oil in the high-pressure buffer chamber 30 will provide kinetic energy to buffer the return of the rotor 5, causing the rotor 5 to return slowly and reducing the impact between the rotor 5 and the housing.

[0036] An oil seal 15 is installed between the input shaft 3 and the housing, an oil seal sleeve 16 is sleeved on the input shaft 3 , and an oil seal ring 17 is installed between the oil seal sleeve 16 and the input shaft 3 .

[0037] The oil seal ring 17 is arranged between the oil seal 15 and the high-pressure buffer chamber 30 of the hydraulic retarder, which can protect the oil seal 15 from the impact of high-pressure oil. At the same time, the oil seal ring 17 uses PEEK material with a very small friction coefficient, which can meet the high-speed rotation requirement of the input shaft 3.

[0038] The input shaft 3 is provided with an input shaft oil passage 12 which is connected to the inside of the oil seal sleeve 16 . A fixing bolt 13 is installed at the end of the input shaft oil passage 12 . The fixing bolt 13 is provided with a fixing bolt oil passage 14 . The end of the fixing bolt oil passage 14 is blocked by a fixing gasket 27 .

[0039] An input shaft oil passage 12 is provided on the input shaft 3, which plays a role in unloading the high-pressure impact of the oil seal 15. The entire oil circuit is connected from the high-pressure area of ​​the oil seal 15 to the low-pressure area of ​​the oil inlet chamber. A section of the oil chamber is connected to the oil inlet chamber of the oil seal 15. The oil chamber can store a certain amount of lubricating oil. When the hydraulic retarder is not working, it plays a role in lubricating the oil seal 15. At the same time, when the hydraulic retarder just starts to fill with oil, when the high-pressure oil enters the front end of the high-pressure chamber oil seal 15, it will cause a high-pressure impact on the oil seal 15. The input shaft oil passage 12 will play a pressure relief role, which is equivalent to a pressure limiting valve.

[0040] A spring seat 7 is mounted on the input shaft 3 , and one end of a release spring 8 abuts against the spring seat 7 , and the other end abuts against the rotor 5 .

[0041] When in use, it is convenient to install the separation spring 8.

[0042] The stator 1 is in the shape of a ring, and the outer side of the stator 1 is connected to the outer shell. The rotor 5 is in the shape of a ring, and a rotor mounting tube 28 matching the input shaft 3 is installed on the inner side of the rotor 5. The rotor mounting tube 28 passes through the stator 1, and a high-pressure chamber sealing ring 11 is installed between the stator 1 and the rotor mounting tube 28.

[0043] A high-pressure chamber sealing ring 11 made of PEEK is used to form a seal between the high-pressure chamber 9 and the low-pressure chamber 10 to prevent the brake oil in the high-pressure chamber 9 from flowing into the low-pressure chamber 10 from the gap between the rotor 5 and the stator 1. After the channel is closed, the engine oil in the high-pressure chamber 9 can only enter the heat exchanger 18 from the external cooling channel for cooling and then re-enter the low-pressure chamber, thereby solving the problem of high-temperature engine oil flowing back to the low-temperature engine oil chamber.

[0044] The housing includes a rotor fixing seat 2 and a stator fixing seat 26 , and a sealing O-ring 29 is placed between the rotor fixing seat 2YU1 and the stator fixing seat 26 .

[0045] This structure is convenient for processing and manufacturing.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic retarder with adjustable rotor position, comprising a housing, to which an input shaft (3) is rotatably connected, characterized in that: The rotor (5) and the input shaft (3) are connected via a non-self-locking helical spline, and a separation spring (8) is installed between the rotor (5) and the input shaft (3).

2. The hydraulic retarder with adjustable rotor position according to claim 1, characterized in that: A stator (1) is installed in the housing. The side of the housing away from the stator (1) is connected to a brake oil cooling inlet (21) of a heat exchanger (18). The side of the housing away from the rotor (5) is connected to a brake oil cooling outlet (22) of the heat exchanger (18). A working chamber (6) is provided between the stator (1) and the rotor (5). An oil inlet pipeline (23) is provided on the stator (1) and passes through the stator (1) and is connected to the working chamber (6). An oil outlet pipeline (24) is provided on the rotor (5) and passes through the rotor (5) and is connected to the working chamber (6).

3. The hydraulic retarder with adjustable rotor position as claimed in claim 2, characterized in that: The rotor (5) is also provided with an oil outlet buffer hole (25) which penetrates the rotor (5) and is connected to the working chamber (6).

4. The hydraulic retarder with adjustable rotor position according to claim 1, characterized in that: An oil seal (15) is installed between the input shaft (3) and the housing, an oil seal sleeve (16) is sleeved on the input shaft (3), and an oil seal ring (17) is installed between the oil seal sleeve (16) and the input shaft (3).

5. The hydraulic retarder with adjustable rotor position as claimed in claim 4, characterized in that: An input shaft oil passage (12) communicating with the interior of the oil seal sleeve (16) is formed on the input shaft (3); a fixing bolt (13) is installed at the end of the input shaft oil passage (12); a fixing bolt oil passage (14) is formed on the fixing bolt (13); and the end of the fixing bolt oil passage (14) is blocked by a fixing gasket (27).

6. The hydraulic retarder with adjustable rotor position according to any one of claims 1 to 5, characterized in that: A spring seat (7) is mounted on the input shaft (3); one end of a separation spring (8) abuts against the spring seat (7) and the other end abuts against the rotor (5).

7. The hydraulic retarder with adjustable rotor position according to any one of claims 1 to 5, characterized in that: The stator (1) is in the shape of a ring. The outer side of the stator (1) is connected to the housing. The rotor (5) is in the shape of a ring. A rotor mounting tube (28) matching the input shaft (3) is installed on the inner side of the rotor (5). The rotor mounting tube (28) passes through the stator (1). A high-pressure chamber sealing ring (11) is installed between the stator (1) and the rotor mounting tube (28).

8. The hydraulic retarder with adjustable rotor position according to any one of claims 1 to 5, characterized in that: The housing comprises a rotor fixing seat (2) and a stator fixing seat (26), and a sealing O-ring (29) is placed between the rotor fixing seat (2) and the stator fixing seat (26).

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