Roots type high viscosity oil medium high pressure retarder and automobile

Abstract

The present invention provides a Roots-type high-viscosity oil medium high-pressure retarder and a car, and relates to the technical field of retarders. The Roots-type high-viscosity oil medium high-pressure retarder comprises a working housing, a Roots-type transmission assembly and a flow limiting valve; a working chamber for the movement of the Roots-type transmission assembly is provided in the working housing, and an oil inlet and an oil outlet connected to the working chamber are provided on the working housing; the working chamber is filled with a high-viscosity oil working medium; and the flow limiting valve is connected to the oil outlet. The car comprises a car body and a Roots-type high-viscosity oil medium high-pressure retarder; the Roots-type high-viscosity oil medium high-pressure retarder is arranged on the car body, and the Roots-type high-viscosity oil medium high-pressure retarder is connected to the car drive shaft through a speed reduction and torque increase gear pair. A technical effect with good use effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of retarders, and in particular to a Roots-type high-viscosity oil medium high-pressure retarder and a vehicle. Background Art

[0002] Urban roads have many intersections, dense bus stops, and large passenger flow, so buses often need to brake frequently; mountain roads are steep and have many sharp turns, so medium and large trucks and buses that travel on mountain roads for a long time also need to brake frequently. When the brakes work frequently for a long time, the brake shoes will wear out quickly, the service life of the brake friction pads will be short, and the braking force will be lost or the braking performance will be greatly reduced due to the thermal decay of the brakes, which has also become the main cause of traffic accidents. Therefore, it is very necessary to equip an auxiliary braking system.

[0003] As an auxiliary braking component of a vehicle, the retarder acts on the transmission system of the original vehicle to reduce the load of the original vehicle's braking system, so that the vehicle can be decelerated evenly, thereby improving the reliability of the vehicle's braking system, extending the service life of the braking system, and thus significantly reducing the cost of using the vehicle. Currently, there are eddy current retarders and hydraulic retarders, but eddy current retarders are large in size, heavy in body, consume a lot of electricity, and are greatly affected by the ambient temperature; while hydraulic retarders are large in size, relatively slow in reaction speed, insufficient in low-speed braking force, and large in no-load loss, resulting in poor retarder use effect.

[0004] Therefore, providing a Roots-type high-viscosity oil medium high-pressure retarder and a vehicle with good use effect has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a Roots-type high-viscosity oil medium high-pressure retarder and a vehicle, so as to alleviate the technical problem of poor use effect of the retarder in the prior art.

[0006] In a first aspect, an embodiment of the present invention provides a Roots-type high-viscosity oil medium high-pressure retarder, comprising a working housing, a Roots-type transmission assembly and a flow limiting valve;

[0007] A working cavity for the movement of the Roots-type transmission assembly is provided in the working housing, and an oil inlet and an oil outlet communicating with the working cavity are provided on the working housing;

[0008] The working cavity is filled with a high-viscosity oil working medium;

[0009] The flow limiting valve is communicated with the oil outlet.

[0010] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the above-mentioned Roots-type transmission assembly includes a rotating shaft and a power Roots rotor and an output Roots rotor that can mesh with each other;

[0011] The power Roots rotor and the output Roots rotor are both arranged in the working chamber;

[0012] The power Roots rotor and the output Roots rotor are both provided with the rotating shaft, and the rotating shaft extends out of the working housing.

[0013] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the rotating shaft comprises a power shaft and an output shaft;

[0014] The power Roots rotor is fixedly sleeved on the power shaft, and the output Roots rotor is fixedly sleeved on the output shaft.

[0015] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an oil seal ring for sealing the rotating shaft is provided on the working housing.

[0016] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a bearing for supporting the rotating shaft is provided on the working housing.

[0017] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the working housing includes a front housing, a middle housing and a rear housing;

[0018] The middle shell is located between the front shell and the rear shell, and two ends of the middle shell are sealed and connected to the front shell and the rear shell respectively.

[0019] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a gap control sheet is provided in the working chamber, and the gap control sheet is located between the end of the Roots-type transmission assembly and the working housing;

[0020] The front shell and the middle shell are provided with a liquid flow channel for driving the gap control sheet.

[0021] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the effective area of ​​the above-mentioned liquid flow channel on the gap control plate is larger than the effective area of ​​the high-viscosity oil working medium in the working chamber on the gap control plate.

[0022] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a heat exchanger is provided on the rear shell.

[0023] In a second aspect, an embodiment of the present invention provides a vehicle, comprising a vehicle body and the Roots-type high-viscosity oil medium high-pressure retarder;

[0024] The Roots-type high-viscosity oil medium high-pressure retarder is arranged on the vehicle body, and the Roots-type high-viscosity oil medium high-pressure retarder is connected to the vehicle transmission shaft through a speed reduction and torque increase gear pair.

[0025] Beneficial effects:

[0026] An embodiment of the present invention provides a Roots-type high-viscosity oil medium high-pressure retarder, comprising a working housing, a Roots-type transmission assembly and a flow limiting valve; a working chamber for the movement of the Roots-type transmission assembly is provided in the working housing, and an oil inlet and an oil outlet connected to the working chamber are provided on the working housing; the working chamber is filled with a high-viscosity oil working medium; and the flow limiting valve is connected to the oil outlet.

[0027] Specifically, when the vehicle needs to slow down, the high-viscosity oil working medium in the oil tank will be transmitted to the working chamber along the oil channel, and then as the Roots transmission assembly continues to rotate, the pressure change in the working chamber causes the high-viscosity oil working medium to move in the oil channel circuit and generate greater resistance, thereby generating a braking torque, and the pressure in the working chamber can be adjusted by adjusting the opening of the limiting valve, thereby achieving the adjustment of the magnitude of the braking torque; when the vehicle does not need to slow down, the high-viscosity oil working medium in the working chamber can flow back to the oil tank. The Roots mechanical structure has a large flow rate, can run dry, has high reliability, and does not provide braking force. The overall structure is small in size, low in weight, and has a fast response and strong braking force.

[0028] The embodiment of the present invention provides a car, comprising a car body and a Roots-type high-viscosity oil medium high-pressure retarder; the Roots-type high-viscosity oil medium high-pressure retarder is arranged on the car body, and the Roots-type high-viscosity oil medium high-pressure retarder is connected to the car drive shaft through a speed reduction and torque increase gear pair. The car has the above advantages compared with the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1A schematic diagram of a Roots-type high-viscosity oil medium high-pressure retarder provided by an embodiment of the present invention;

[0031] Figure 2 A cross-sectional view of a working housing and its components in a Roots-type high-viscosity oil medium high-pressure retarder provided in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the front housing of a Roots-type high-viscosity oil medium high-pressure retarder provided in an embodiment of the present invention.

[0033] icon:

[0034] 100-working housing; 101-oil inlet; 102-oil outlet; 103-working chamber; 110-front housing; 120-middle housing; 130-rear housing; 140-liquid flow channel;

[0035] 200-Roots transmission assembly; 210-power Roots rotor; 220-output Roots rotor; 230-power shaft;

[0036] 310-Oil seal ring; 320-Bearing;

[0037] 400-gap control sheet;

[0038] 500-Heat exchanger. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0044] See also Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a Roots-type high-viscosity oil medium high-pressure retarder, comprising a working housing 100, a Roots-type transmission assembly 200 and a flow limiting valve; a working chamber 103 for movement of the Roots-type transmission assembly 200 is provided in the working housing 100, and an oil inlet 101 and an oil outlet 102 connected to the working chamber 103 are provided on the working housing 100; the working chamber 103 is filled with a high-viscosity oil working medium; and the flow limiting valve is connected to the oil outlet 102.

[0045] Specifically, when the vehicle needs to slow down, the high-viscosity oil working medium in the oil tank will be transmitted to the working chamber 103 along the oil channel, and then as the Roots-type transmission assembly 200 continues to rotate, the pressure change in the working chamber 103 causes the high-viscosity oil working medium to move in the oil channel circuit and generate greater resistance, thereby generating a braking torque, and the pressure in the working chamber 103 can be adjusted by adjusting the opening of the flow limiting valve, thereby achieving the adjustment of the magnitude of the braking torque; when the vehicle does not need to slow down, the high-viscosity oil working medium in the working chamber 103 can flow back to the oil tank, and the Roots-type mechanical structure has a large flow rate, can run dry, has high reliability, and does not provide braking force. The overall structure is small in size, low in weight, and has a fast response and strong braking force.

[0046] Specifically, the high-viscosity oil working medium in the oil tank can be transported to the working chamber 103 or discharged from the working chamber 103 through the auxiliary pump and other components inside the automobile. When the high-viscosity oil working medium exists in the working chamber 103, it can provide braking force for the vehicle; when there is no high-viscosity oil working medium in the working chamber 103, the vehicle drives normally, and the Roots-type high-viscosity oil medium high-pressure retarder provided in this embodiment will not provide braking force.

[0047] Among them, the high-viscosity oil working medium is still fluid below minus 40°C, and has a dynamic viscosity of 30mPa.s above 90°C, and can withstand a high temperature of 160°C. For example, the high-viscosity oil working medium can use 0W40, 5W40 and other types of engine oil.

[0048] In addition, when the brake is in operation, the pressure in the working chamber 103 can reach 7 MPa, and can reach a maximum of 15-25 MPa.

[0049] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional scheme of this embodiment, the Roots-type transmission assembly 200 includes a rotating shaft and a power Roots rotor 210 and an output Roots rotor 220 that can mesh with each other; the power Roots rotor 210 and the output Roots rotor 220 are both arranged in the working cavity 103; the power Roots rotor 210 and the output Roots rotor 220 are both provided with a rotating shaft, and the rotating shaft extends out of the working housing 100.

[0050] Specifically, the power Roots rotor 210 and the output Roots rotor 220 can mesh with each other, and the power Roots rotor 210 and the output Roots rotor 220 can be connected to the power system of the vehicle by rotating the shaft.

[0051] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the rotating shaft includes a power shaft 230 and an output shaft; the power Roots rotor 210 is fixedly sleeved on the power shaft 230, and the output Roots rotor 220 is fixedly sleeved on the output shaft.

[0052] Specifically, the power Roots rotor 210 can be connected to the power system of the vehicle through the power shaft 230, so that when the working cavity 103 is filled with high-viscosity oil working medium, it can provide braking force for the vehicle. When the working cavity 103 is not filled with high-viscosity oil working medium, the power Roots rotor 210 can normally transmit power to the output Roots rotor 220; and when the vehicle does not need to brake, the high-viscosity oil working medium in the working cavity 103 can be discharged, so that both the power Roots rotor 210 and the output Roots rotor 220 are idling, which does not affect the transmission of vehicle power output to the wheels.

[0053] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, an oil seal ring 310 for sealing the rotating shaft is provided on the working housing 100 .

[0054] Specifically, an oil seal ring 310 is disposed on the working housing 100 . The oil seal ring 310 can seal the rotating shaft and the working housing 100 to prevent oil leakage.

[0055] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, a bearing 320 for supporting a rotating shaft is provided on the working housing 100 .

[0056] Specifically, a bearing 320 is provided on the working housing 100 , and the rotating shaft is supported by the bearing 320 , thereby reducing the wear between the rotating shaft and the working housing 100 .

[0057] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional scheme of this embodiment, the working shell 100 includes a front shell 110, a middle shell 120 and a rear shell 130; the middle shell 120 is located between the front shell 110 and the rear shell 130, and the two ends of the middle shell 120 are respectively sealed and connected to the front shell 110 and the rear shell 130.

[0058] Specifically, the working housing 100 is configured to be a front housing 110 , a middle housing 120 and a rear housing 130 , which is convenient for workers to process.

[0059] See also Figure 1 , Figure 2 and Figure 3As shown, in an optional scheme of this embodiment, a gap control plate 400 is provided in the working cavity 103, and the gap control plate 400 is located between the end of the Roots-type transmission assembly 200 and the working housing 100; a liquid flow channel 140 for driving the gap control plate 400 is opened on the front housing 110 and the middle housing 120.

[0060] In addition, the effective area of ​​the liquid flow channel 140 on the gap control plate 400 is larger than the effective area of ​​the high viscosity oil working medium in the working chamber 103 on the gap control plate 400 .

[0061] Specifically, by setting the gap control plate 400, oil can be introduced through the liquid flow channel 140 to pressurize the gap control plate 400, so that the gap control plate 400 is pressed toward the two ends of the Roots-type transmission assembly 200, thereby increasing the pressure of the high-viscosity oil working medium in the working chamber 103, thereby increasing the braking force provided by the Roots-type high-viscosity oil medium high-pressure retarder provided in this embodiment.

[0062] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, a heat exchanger 500 is provided on the rear shell 130 .

[0063] Specifically, the heat exchanger 500 is used to dissipate heat from the working housing 100 to prevent the working housing 100 from overheating.

[0064] It should be noted that the power shaft 230 of the Roots-type high-viscosity oil medium high-pressure retarder provided in this embodiment is connected to the transmission shaft of the gearbox by a speed-increasing and torque-reducing gear. Driven by the torque of the transmission shaft, the high-viscosity oil working medium generates a rotary motion in the working chamber 103, and the pressure change drives the high-viscosity oil working medium in the pipeline to flow. Under the action of the high-viscosity oil working medium, the mechanical energy of the Roots-type transmission assembly 200 is converted into heat energy, and finally the vehicle braking force is generated to realize the vehicle deceleration function. Different from the hydraulic coupling principle of the traditional hydraulic retarder, the Roots-type high-viscosity oil medium high-pressure retarder provided in this embodiment directly intervenes in the vehicle transmission torque through the hydraulic pressure of the high-viscosity oil working medium, so the reaction speed is faster.

[0065] This embodiment provides an automobile, including a vehicle body and a Roots-type high-viscosity oil medium high-pressure retarder; the Roots-type high-viscosity oil medium high-pressure retarder is arranged on the vehicle body, and the Roots-type high-viscosity oil medium high-pressure retarder is connected to the vehicle drive shaft through a speed reduction and torque increase gear pair.

[0066] Specifically, a floating oil distribution plate is used on the end faces of the two Roots rotors, and the high-pressure working medium in the working cavity 103 is guided into the sealed cavity between the floating oil distribution plate and the working housing 100 through a channel from the output cavity of the working housing 100, and a force is generated to push the floating oil distribution plate toward the end face of the Roots rotor, so that the end face gap is less than 0.02mm, thereby compressing the working medium in the working cavity 103, so that the pressure in the working cavity 103 can reach 7MPa, and the maximum can reach 15-25MPa. And the vacuum degree can be used to increase the deceleration torque during braking.

[0067] In addition, when rotation is not required, the working medium in the working chamber 103 can be sucked out, and when no-load, the oil inlet passage of the working chamber 103 can be closed, and then air can be passed into the oil inlet chamber, so that the no-load resistance is small.

[0068] In addition, the automobile provided in this embodiment has the advantages of the above-mentioned Roots-type high-viscosity oil medium high-pressure retarder compared with the prior art, which will not be described in detail here.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Roots-type high-viscosity oil medium high-pressure retarder, characterized in that: It comprises: a working housing (100), a Roots-type transmission assembly (200) and a flow limiting valve; A working cavity (103) for the Roots-type transmission assembly (200) to move is provided in the working housing (100), and an oil inlet (101) and an oil outlet (102) communicating with the working cavity (103) are provided on the working housing (100); The working cavity (103) is filled with a high-viscosity oil working medium; The flow limiting valve is in communication with the oil outlet (102).

2. The Roots-type high-viscosity oil medium high-pressure retarder according to claim 1, characterized in that: The Roots-type transmission assembly (200) comprises a rotating shaft and a power Roots rotor (210) and an output Roots rotor (220) that can mesh with each other; The power Roots rotor (210) and the output Roots rotor (220) are both arranged in the working chamber (103); The power Roots rotor (210) and the output Roots rotor (220) are both provided with the rotating shaft, and the rotating shaft extends out of the working housing (100).

3. The Roots-type high-viscosity oil medium high-pressure retarder according to claim 2, characterized in that: The rotating shaft comprises a power shaft (230) and an output shaft; The power Roots rotor (210) is fixedly sleeved on the power shaft (230), and the output Roots rotor (220) is fixedly sleeved on the output shaft.

4. The Roots-type high-viscosity oil medium high-pressure retarder according to claim 2, characterized in that: The working housing (100) is provided with an oil seal ring (310) for sealing the rotating shaft.

5. The Roots-type high-viscosity oil medium high-pressure retarder according to claim 4, characterized in that: The working housing (100) is provided with a bearing (320) for supporting the rotating shaft.

6. The Roots-type high-viscosity oil medium high-pressure retarder according to any one of claims 1 to 5, characterized in that: The working housing (100) comprises a front housing (110), a middle housing (120) and a rear housing (130); The middle shell (120) is located between the front shell (110) and the rear shell (130), and two ends of the middle shell (120) are respectively sealed and connected to the front shell (110) and the rear shell (130).

7. The Roots-type high-viscosity oil medium high-pressure retarder according to claim 6, characterized in that: A gap control sheet (400) is arranged in the working cavity (103), and the gap control sheet (400) is located between the end of the Roots-type transmission assembly (200) and the working housing (100); The front housing (110) and the middle housing (120) are provided with a liquid flow channel (140) for driving the gap control sheet (400).

8. The Roots-type high-viscosity oil medium high-pressure retarder according to claim 7, characterized in that: The effective area of ​​the liquid flow channel (140) on the gap control plate (400) is greater than the effective area of ​​the high-viscosity oil working medium in the working chamber (103) on the gap control plate (400).

9. The Roots-type high-viscosity oil medium high-pressure retarder according to claim 8, characterized in that: A heat exchanger (500) is disposed on the rear housing (130).

10. An automobile, characterized in that: It comprises a vehicle body and a Roots-type high-viscosity oil medium high-pressure retarder as claimed in any one of claims 1 to 9; The Roots-type high-viscosity oil medium high-pressure retarder is arranged on the vehicle body, and the Roots-type high-viscosity oil medium high-pressure retarder is connected to the vehicle transmission shaft through a speed reduction and torque increase gear pair.

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