CN217633856U - Pressure maintaining sealing ring, hydraulic retarder and vehicle - Google Patents
Pressure maintaining sealing ring, hydraulic retarder and vehicle Download PDFInfo
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- CN217633856U CN217633856U CN202221686794.8U CN202221686794U CN217633856U CN 217633856 U CN217633856 U CN 217633856U CN 202221686794 U CN202221686794 U CN 202221686794U CN 217633856 U CN217633856 U CN 217633856U
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Abstract
The utility model relates to a hydraulic retarber technical field especially relates to a pressurize sealing ring, hydraulic retarber and vehicle. The inner ring and the outer ring of the pressure maintaining sealing ring are arranged in an inwards concave mode so that the radial section of the pressure maintaining sealing ring is in an I shape, the pressure maintaining sealing ring is provided with an opening, one of two opening ends of the pressure maintaining sealing ring extends outwards along the circumferential direction to form a first step structure, the other opening end extends outwards along the circumferential direction to form a second step structure, and the first step structure is in lap joint fit with the second step structure so that the two opening ends of the pressure maintaining sealing ring are connected; the distance between the two opening ends of the pressure maintaining sealing ring accounts for 1-1.5% of the inner diameter of the pressure maintaining sealing ring. The hydrodynamic retarder comprises the pressure maintaining sealing ring. The vehicle comprises the hydrodynamic retarder. The radial cross section of the pressure maintaining sealing ring is I-shaped, so that the structural strength is enhanced, the sealing effect and the pressure resistance are improved, and the sealing effect of the working cavity in the hydraulic retarder is improved.
Description
Technical Field
The utility model relates to a hydraulic retarber technical field especially relates to a pressurize sealing ring, hydraulic retarber and vehicle.
Background
The hydrodynamic retarder is a device which utilizes the damping effect when liquid flows to generate anti-drag torque to a vehicle, plays a role in auxiliary braking, and is often matched with vehicles such as a tractor and a heavy-duty truck. The hydraulic retarder can ensure that the main braking time of the heavy truck is reduced in the long downhill process, and effectively ensures the service life of a main braking system and the safety of the truck.
The hydrodynamic retarder mainly comprises a working cavity, an oil pool and a heat exchanger. The middle shell and the rear shell form an oil pool, a rotor and a stator on a rotor shaft are sealed in a working cavity, and the rotor shaft is linked with a power shaft of a vehicle through an external spline on the shaft. The rotor and the stator are both provided with blades, and the working cavity is communicated with the oil cavity. When the hydraulic retarder works, high-pressure gas enters the oil pool through the gas circuit to press oil, the oil enters the working cavity and then rotates with higher speed under the action of the rotor to impact the stator, the oil is impacted by the stator blades and then acts on the rotor in a reverse mode to enable the rotor to be subjected to reverse braking force, the internal spline of the rotor transmits braking torque to the external spline of the rotor shaft, and therefore the braking torque is transmitted to the power shaft to enable a vehicle to decelerate. When the hydraulic retarder stops working, high-pressure gas in the hydraulic retarder is discharged to the outside atmosphere through the gas circuit. Therefore, the oil liquid flows back to the oil pool from the working cavity, and the hydraulic retarder stops working.
As the rotor shaft needs to penetrate through the working cavity to be connected with a power shaft of a vehicle, the pressure intensity of oil liquid in the working cavity can reach more than 20bar at most, so that the sealing element in direct contact with the working cavity has higher performance index requirements, and the oil seal is easy to slightly deform under high pressure due to limited bearing capacity of the oil seal, so that the working cavity has a small amount of oil liquid leakage condition, and the sealing effect is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pressurize sealing ring, hydraulic retarber and vehicle have higher structural strength and compressive property to make the working chamber of hydraulic retarber have good sealed effect.
To achieve the purpose, the technical proposal adopted by the utility model is that:
an inner ring and an outer ring of the pressure maintaining sealing ring are arranged in an inwards concave mode, so that the radial section of the pressure maintaining sealing ring is in an I shape, the pressure maintaining sealing ring is provided with an opening, one of two opening ends of the pressure maintaining sealing ring extends outwards along the circumferential direction of the pressure maintaining sealing ring to form a first step structure, the other opening end of the two opening ends of the pressure maintaining sealing ring extends outwards along the circumferential direction of the pressure maintaining sealing ring to form a second joint and form a second step structure, and the first step structure is in lap joint fit with the second step structure, so that the two opening ends of the pressure maintaining sealing ring are connected; the distance between the two opening ends of the pressure maintaining sealing ring accounts for 1% -1.5% of the inner diameter of the pressure maintaining sealing ring.
Preferably, the first step structure and the second step structure are first step structures along the radial direction of the pressure maintaining sealing ring.
Preferably, the first joint and the second joint have the same thickness, and the sum of the first joint and the second joint is equal to the thickness of the pressure-maintaining seal ring.
Preferably, the first step structure and the second step structure are multi-stage step structures along the radial direction of the pressure maintaining sealing ring.
Preferably, the first step structure and the second step structure are first step structures along the width direction of the pressure maintaining sealing ring.
Preferably, the first joint and the second joint have the same width, and the sum of the first joint and the second joint is equal to the width of the pressure retaining seal ring.
Preferably, the first step structure and the second step structure are multi-stage step structures along the width direction of the pressure maintaining seal ring.
Preferably, the pressure maintaining sealing ring is a rubber ring.
A hydraulic retarder comprises a rotor shaft, a stator, an oil seal and the pressure maintaining sealing ring; first annular and second annular have been seted up respectively to the rotor shaft along its axial front end and rear end, first annular with all the cover is equipped with in the second annular the pressurize sealing ring, in the first annular the outer lane butt of pressurize sealing ring in the metal framework of oil blanket, in the second annular the outer lane butt of pressurize sealing ring in the internal surface of the mounting hole of stator.
A vehicle comprises the hydraulic retarder.
The utility model has the advantages that:
the utility model provides a radial cross-section of pressurize sealing ring is the I shape, and simple structure and intensity are higher, can avoid receiving high-pressure liquid impact in the long-time use and take place to warp, has improved the sealed effect and the compressive property of pressurize sealing ring, is favorable to increase of service life. Meanwhile, the pressure maintaining sealing ring hole is provided with an opening, so that the use and the installation are convenient. Meanwhile, the distance between the two opening ends of the pressure maintaining sealing ring accounts for 1% -1.5% of the inner diameter of the pressure maintaining sealing ring, so that the first connector and the second connector can be matched in an overlapping mode, and the sealing performance of the pressure maintaining sealing ring can be prevented from being reduced due to overlarge clearance.
The utility model provides a hydraulic retarber is through using foretell pressurize sealing ring, can strengthen the sealed effect of hydraulic retarber inner working chamber, avoids the fluid of working chamber to take place to leak, has improved the working property of hydraulic retarber.
The utility model provides a vehicle includes foretell hydraulic retarber, can strengthen the sealed effect of the inside working chamber of hydraulic retarber, avoids the fluid of working chamber to take place to leak, has improved the auxiliary brake performance of vehicle to the security performance of vehicle has been improved.
Drawings
Fig. 1 is a partial cross-sectional view of a hydrodynamic retarder according to an embodiment of the present invention;
fig. 2 is a radial cross-sectional view of a pressure maintaining sealing ring provided in an embodiment of the present invention;
fig. 3 is a schematic structural view of a pressure maintaining sealing ring according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a pressure maintaining sealing ring provided in the second embodiment of the present invention.
The component names and designations in the drawings are as follows:
1. pressure maintaining sealing rings; 11. a first joint; 12. a second joint; 2. a rotor shaft; 21. a first ring groove; 3. a rotor; 4. oil sealing; 5. a working chamber.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example one
The embodiment discloses a hydraulic retarder which is mainly used for vehicles such as tractors and heavy-duty trucks. When the vehicle runs on a long downhill, the hydraulic retarder plays a role in auxiliary braking, and the service life of a main braking system and the safety of the vehicle are effectively guaranteed.
As shown in fig. 1, the hydrodynamic retarder comprises a rotor shaft 2, a stator (not shown in the figure), an oil seal 4 and a working chamber 5. The rotor shaft 2 is provided with a rotor 3, the rotor 3 and a stator are sealed in a working cavity 5, and the rotor shaft 2 is linked with a power shaft of a vehicle through an external spline on the shaft. When the hydraulic retarder works, oil enters the working cavity 5 and then rotates in an accelerating mode under the action of the rotor 3 to impact the stator, the stator blades impact the rotor 3 and then act on the rotor 3 in a reverse mode, so that the rotor 3 is subjected to reverse braking force, the rotor 3 transmits braking torque to the external splines of the rotor shaft 2, and the braking torque is transmitted to the power shaft to decelerate a vehicle.
At present, a working cavity 5 of the hydrodynamic retarder is sealed through an oil seal 4, and because the working cavity 5 is a high-pressure area (the highest pressure intensity of oil can reach more than 20 bar), the oil seal 4 is easy to slightly deform under the action of high pressure, so that the working cavity 5 has the condition of oil leakage, and the working performance of the hydrodynamic retarder is influenced.
In order to solve the above problem, as shown in fig. 1 to fig. 3, the embodiment further discloses a pressure maintaining sealing ring 1, an inner ring and an outer ring of the pressure maintaining sealing ring 1 are recessed so as to make a radial cross section of the pressure maintaining sealing ring 1 be i-shaped, the pressure maintaining sealing ring 1 has an opening, one of two opening ends of the pressure maintaining sealing ring 1 extends outwards along a circumferential direction of the pressure maintaining sealing ring 1 to form a first step structure, the other opening end extends outwards along the circumferential direction of the pressure maintaining sealing ring 1 to form a second step structure, and the first step structure is in lap joint with the second step structure so as to make two opening ends of the pressure maintaining sealing ring 1 connected.
Specifically, the rotor shaft 2 is respectively provided with a first annular groove 21 and a second annular groove (not shown in the figure) along the front end and the rear end of the axial direction thereof, the pressure maintaining sealing ring 1 is sleeved in the first annular groove 21 and the second annular groove, the outer ring of the pressure maintaining sealing ring 1 in the first annular groove 21 abuts against the metal framework of the oil seal 4, and the outer ring of the pressure maintaining sealing ring 1 in the second annular groove abuts against the inner surface of the mounting hole of the stator. When working chamber 5 intussuseption is filled with highly compressed hydraulic oil, pressurize sealing ring 1 in the first annular 21 receives along 2 left pressures of rotor shaft, pressurize sealing ring 1 in the second annular receives along the 2 right sides pressures of rotor shaft, because the radial cross-section of pressurize sealing ring 1 is the I shape, make pressurize sealing ring 1 have higher structural strength, can bear higher oil pressure power, can not take place to warp at the impact that receives high-pressure fluid for a long time, the sealed effect of pressurize sealing ring 1 has been improved, be favorable to prolonging the life of pressurize sealing ring 1. Meanwhile, the leakage condition of oil in the working cavity 5 is improved, and the working performance of the hydraulic retarder is improved.
Because the pressure maintaining sealing ring 1 is designed to be an opening, the pressure maintaining sealing ring can be conveniently and quickly installed in the first annular groove 21 and the second annular groove, the installation difficulty of the pressure maintaining sealing ring 1 is reduced, and the installation efficiency is improved. When the hydraulic retarder works, the rotor shaft 2 rotates at a high speed, the pressure maintaining sealing ring 1 can expand radially due to the inertia effect (or the centrifugal force effect), the outer ring of the pressure maintaining sealing ring 1 in the first annular groove 21 is tightly abutted to the metal framework of the oil seal 4, the outer ring of the pressure maintaining sealing ring 1 in the second annular groove is tightly abutted to the inner surface of the mounting hole of the stator, and the sealing effect of the working cavity 5 is further improved. Simultaneously, because first stair structure and second stair structure overlap joint cooperation, even can take place wearing and tearing after pressurize sealing ring 1 takes place radial expansion or uses for a long time, its two open ends also can remain throughout and link to each other, avoid working chamber 5 to take place to leak, further improved the sealed effect of working chamber 5.
As shown in fig. 3, the first step structure and the second step structure are both one-step structures along the radial direction of the pressure maintaining seal ring 1. The first joint 11 and the second joint 12 are in lap joint fit along the radial direction of the pressure maintaining seal ring 1.
Specifically, the thickness of first joint 11 is the same with second joint 12, and the sum of both equals the thickness of pressurize sealing ring 1 for first joint 11 can smooth transition at the opening part with the inner circle and the outer lane of pressurize sealing ring 1 when 12 along the radial overlap joint cooperation of pressurize sealing ring 1 with second joint, avoid appearing sunken or protruding, improved the sealed effect of pressurize sealing ring 1.
The first joint 11 of this embodiment forms one-level stair structure with an open end that links to each other, and the second connects 12 and another open end that links to each other and forms one-level stair structure for the simple structure of two open ends of pressurize sealing ring 1, the processing of being convenient for is favorable to reducing the cost of pressurize sealing ring 1. Of course, the first step structure and the second step structure may also be a multi-step structure along the radial direction of the pressure maintaining sealing ring 1, that is, a multi-step structure formed at two opening ends of the pressure maintaining sealing ring 1 and engaged with each other in an overlapping manner is formed, and is not limited specifically herein.
As shown in fig. 3, a certain gap is formed between two open ends of the pressure maintaining sealing ring 1 to ensure that the first joint 11 and the second joint 12 are in radial lap joint fit along the pressure maintaining sealing ring 1, and to avoid the interference between the first joint 11 and the second joint 12 and the open ends of the opposite pressure maintaining sealing ring 1, which affects the normal use of the pressure maintaining sealing ring 1.
Specifically, the distance (maximum clearance value) between the two open ends of the pressure maintaining sealing ring 1 accounts for 1% -1.5% of the inner diameter of the pressure maintaining sealing ring 1, so that the first joint 11 and the second joint 12 can be matched along the radial lap joint of the pressure maintaining sealing ring 1, and the sealing performance of the pressure maintaining sealing ring 1 can be prevented from being reduced due to too large clearance.
It should be noted that, the pressure maintaining sealing ring 1 of the embodiment is a rubber ring, and has low cost and good sealing effect.
The embodiment also discloses a vehicle, and the vehicle improves the auxiliary braking performance of the vehicle by adopting the hydraulic retarder, so that the safety performance of the vehicle is improved. The vehicle may be a heavy truck, a tractor, or the like, to name a few.
Example two
The present embodiment also discloses a pressure maintaining sealing ring 1, and the main difference between the pressure maintaining sealing ring 1 and the first embodiment is that: the first step structure and the second step structure are distributed at different positions.
As shown in fig. 4, the first step structure and the second step structure are both step structures along the width direction of the pressure maintaining seal ring 1. One open end of the pressure maintaining sealing ring 1 is outwardly extended along the circumferential direction thereof with a first joint 11, the other open end is outwardly extended along the circumferential direction thereof with a second joint 12, and the first joint 11 and the second joint 12 are in lap joint along the width direction of the pressure maintaining sealing ring 1.
Specifically, the width that first joint 11 and second connect 12 is the same, and the sum of both equals with the width of pressurize sealing ring 1 for pressurize sealing ring 1 can smooth transition at its two open ends when first joint 11 and second connect 12 along 1 width direction overlap joint cooperation of pressurize sealing ring, avoid appearing sunken or protruding, improved the sealed effect of pressurize sealing ring 1.
The first joint 11 of this embodiment forms one-level stair structure with an open end that links to each other, and the second connects 12 and another open end that links to each other and forms one-level stair structure for the simple structure of two open ends of pressurize sealing ring 1, the processing of being convenient for is favorable to reducing the cost of pressurize sealing ring 1. Of course, the first step structure and the second step structure may also be a multi-step structure, that is, a multi-step structure that is formed at two opening ends of the pressure-retaining sealing ring 1 and is in lap joint with each other is formed, and is not limited herein.
It should be noted that, have certain clearance between two open ends of pressurize sealing ring 1 to guarantee that first joint 11 and second joint 12 take place to interfere with the open end of relative pressurize sealing ring 1 respectively along the overlap joint cooperation of pressurize sealing ring 1 width direction, avoid first joint 11 and second joint 12, influence the normal use of pressurize sealing ring 1.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The pressure maintaining sealing ring is characterized in that an inner ring and an outer ring of the pressure maintaining sealing ring are arranged in a concave manner, so that the radial section of the pressure maintaining sealing ring is in an I shape, the pressure maintaining sealing ring is provided with an opening, one of two opening ends of the pressure maintaining sealing ring extends outwards along the circumferential direction of the pressure maintaining sealing ring to form a first joint (11) and a first stepped structure, the other opening end of the two opening ends of the pressure maintaining sealing ring extends outwards along the circumferential direction of the pressure maintaining sealing ring to form a second joint (12) and a second stepped structure, and the first stepped structure and the second stepped structure are in lap joint fit to enable the two opening ends of the pressure maintaining sealing ring to be connected; the distance between the two opening ends of the pressure maintaining sealing ring accounts for 1% -1.5% of the inner diameter of the pressure maintaining sealing ring.
2. The packing ring of claim 1, wherein the first step structure and the second step structure are one-step structures along a radial direction of the packing ring.
3. The packing ring of claim 2, characterized in that the thickness of the first joint (11) and the second joint (12) are the same, and the sum of the two is equal to the thickness of the packing ring.
4. The packing ring of claim 1, wherein the first step structure and the second step structure are multi-stage step structures along a radial direction of the packing ring.
5. The packing ring of claim 1, wherein the first step-structure and the second step-structure are one-step structures along a width direction of the packing ring.
6. The packing ring of claim 5, characterized in that the width of the first joint (11) and the second joint (12) is the same, and the sum of the two is equal to the width of the packing ring.
7. The packing ring of claim 1, wherein the first step structure and the second step structure are multi-stage step structures along a width direction of the packing ring.
8. The packing ring of any of claims 1 to 7, wherein the packing ring is a rubber ring.
9. A hydrodynamic retarder, characterized by comprising a rotor shaft (2), a stator, an oil seal (4) and the pressure maintaining sealing ring of any one of claims 1 to 8; first annular (21) and second annular have been seted up respectively to rotor shaft (2) along its axial front end and rear end, first annular (21) with all overlap in the second annular is equipped with the pressurize sealing ring, in first annular (21) the outer lane butt of pressurize sealing ring in the metal framework of oil blanket (4), in the second annular the outer lane butt of pressurize sealing ring in the internal surface of the mounting hole of stator.
10. A vehicle comprising a hydrodynamic retarder according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221686794.8U CN217633856U (en) | 2022-07-01 | 2022-07-01 | Pressure maintaining sealing ring, hydraulic retarder and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221686794.8U CN217633856U (en) | 2022-07-01 | 2022-07-01 | Pressure maintaining sealing ring, hydraulic retarder and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217633856U true CN217633856U (en) | 2022-10-21 |
Family
ID=83631078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221686794.8U Active CN217633856U (en) | 2022-07-01 | 2022-07-01 | Pressure maintaining sealing ring, hydraulic retarder and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217633856U (en) |
-
2022
- 2022-07-01 CN CN202221686794.8U patent/CN217633856U/en active Active
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