Loading system and pump retarder

Abstract

The present invention provides a loading system and a pump-type retarder, which relate to the technical field of vehicle retarders. The loading system is used for the pump-type retarder. The pump-type retarder includes a main body and a rotor. A working chamber is provided in the main body. The rotor is provided in the working chamber, and the working chamber is divided into a high-pressure area and a low-pressure area. The loading system includes: an oil tank, a control pump, a flow control valve and an unloading valve; the unloading valve controls the connection between the high-pressure area and the low-pressure area; the control pump controls the opening of the unloading valve; the flow control valve is provided at the flow rate of the oil outlet. When the loading system is loaded, the control pump controls the opening of the unloading valve to decrease, and the opening of the flow control valve to decrease. By setting the control pump, the flow control valve and the unloading valve, the pressure in the working chamber is closed-loop controlled, the torque of the rotor can be controlled in real time, and the functions of long slope deceleration and anti-lock braking can be realized, and the response speed is fast and the efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle retarders, and in particular to a loading system and a pump type retarder. Background Art

[0002] The braking system is a device on a car that allows the outside world to exert a certain force on certain parts of the car, thereby forcing it to brake to a certain extent. It can force the car to slow down or even stop.

[0003] The existing brakes are mainly based on friction braking. During their working process, they generate sufficient friction by pressing two relatively moving objects. However, friction will cause wear and tear, and heat will be generated, causing the friction plate material to fail and leading to brake failure. Therefore, it is very necessary to equip an auxiliary braking system.

[0004] As an auxiliary braking component of the vehicle, the retarder reduces the load on the original vehicle's braking system by acting on the original vehicle's transmission system, allowing the vehicle to decelerate evenly, thereby improving the reliability of the vehicle's braking system, extending the service life of the braking system, and significantly reducing the vehicle's operating costs.

[0005] At present, the retarders mainly include engine retarders, magnetorheological disc retarders, eddy current retarders and hydraulic retarders, etc. Among them, the hydraulic retarder has at least the disadvantages of large size, relatively slow reaction speed, insufficient low-speed braking force, and large no-load loss. Summary of the invention

[0006] (I) The problem to be solved by the present invention is that the existing hydraulic retarder has the disadvantages of relatively slow response speed and large no-load loss.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, an embodiment of the present invention provides a loading system for a pump retarder, wherein the pump retarder comprises a main body and a rotor, wherein a working chamber is provided in the main body, wherein the working chamber is filled with high-viscosity oil, wherein the rotor is provided in the working chamber and can stir the high-viscosity oil, wherein the rotor divides the working chamber into a high-pressure area and a low-pressure area, and wherein the main body is further provided with an oil inlet and an oil outlet connected with the working chamber;

[0009] The loading system comprises: an oil tank, a control pump, a flow control valve, an unloading valve and a first pipeline;

[0010] The oil inlet is connected to the oil tank, the two ends of the first pipeline are connected to the high-pressure area and the low-pressure area respectively, the unloading valve is arranged on the first pipeline, and is used to control the on-off of the first pipeline; the input port of the control pump is connected to the oil tank, the output port of the control pump is connected to the control port of the unloading valve, and controls the opening of the unloading valve; the flow control valve is arranged between the oil outlet and the oil tank;

[0011] When the loading system is loaded, the control pump controls the unloading valve to decrease in opening degree, and the flow control valve to decrease in opening degree.

[0012] According to one embodiment of the present invention, further, the flow control valve includes a flow valve and an electromagnetic proportional valve;

[0013] The electromagnetic proportional valve is connected to the flow valve and controls the opening of the flow valve;

[0014] When the loading system is loaded, the electromagnetic proportional valve controls the flow valve to decrease its opening.

[0015] According to one embodiment of the present invention, further, it also includes a first one-way valve;

[0016] Along the direction from the oil tank to the oil inlet, the control pump and the first one-way valve are arranged in sequence, and the inlet of the first one-way valve is communicated with the output port of the control pump, and the outlet of the first one-way valve is communicated with the oil inlet;

[0017] The control pump is capable of controlling the opening degree of the first one-way valve.

[0018] According to one embodiment of the present invention, further, it also includes a third pipeline;

[0019] One of the inlets of the first one-way valve is a control port, the control port of the first one-way valve is connected to the output port of the control pump, and the control pump controls the on and off of the first one-way valve;

[0020] The other inlet of the first one-way valve is connected to one end of the third pipeline;

[0021] One end of the third pipeline away from the first one-way valve is communicated with the oil tank.

[0022] According to one embodiment of the present invention, further, it also includes a second pipeline and a second control valve;

[0023] The main body is provided with a first air hole;

[0024] One end of the second pipeline is connected to the first air hole, and the other end is connected to the air. The second control valve is arranged on the second pipeline and controls the on and off of the second pipeline.

[0025] When the loading system is loaded, the second control valve controls the second pipeline to be disconnected.

[0026] According to an embodiment of the present invention, further, a bearing installation cavity is provided in the main body, a bearing is provided in the bearing installation cavity, an input shaft is provided on the bearing, and the rotor is provided on the input shaft;

[0027] The output port of the control pump is also communicated with the bearing installation cavity, and can pump high-viscosity oil into the bearing installation cavity.

[0028] According to an embodiment of the present invention, further, a second air hole is provided on the oil tank;

[0029] The loading system also includes a second one-way valve;

[0030] The inlet of the second one-way valve is communicated with the oil tank, and the outlet of the second one-way valve is communicated with the outside.

[0031] According to an embodiment of the present invention, further, a plurality of unloading valves are provided on the first pipeline;

[0032] A control port of any one of the unloading valves is connected to the control pump;

[0033] Any two of the unloading valves are connected in parallel.

[0034] According to an embodiment of the present invention, further, the control pump is arranged on the main body.

[0035] Another embodiment of the present invention further provides a pump retarder, comprising the loading system described in any of the above embodiments.

[0036] Beneficial effects of the present invention:

[0037] The present invention provides a loading system for a pump retarder, which comprises a main body and a rotor. A working chamber is provided in the main body, the working chamber is filled with high-viscosity oil, the rotor is arranged in the working chamber and can stir the high-viscosity oil, the rotor divides the working chamber into a high-pressure area and a low-pressure area, and the main body is also provided with an oil inlet and an oil outlet connected to the working chamber; the loading system comprises: an oil tank, a control pump, a flow control valve, an unloading valve and a first pipeline; the oil inlet is connected to the oil tank, the two ends of the first pipeline are respectively connected to the high-pressure area and the low-pressure area, the unloading valve is arranged on the first pipeline, and is used to control the on-off of the first pipeline; the input port of the control pump is connected to the oil tank, the output port of the control pump is connected to the control port of the unloading valve, and controls the opening of the unloading valve; the flow control valve is arranged between the oil outlet and the oil tank; when the loading system is loaded, the control pump controls the unloading valve opening to decrease, and the flow control valve opening decreases.

[0038] By setting a control pump, a flow control valve and a unloading valve, the pressure in the working chamber is controlled in a closed loop, the torque of the rotor can be controlled in real time, and functions such as long slope deceleration and anti-lock braking can be realized with fast response speed and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 A schematic diagram of the structure of a loading system provided in an embodiment of the present invention.

[0041] Icon: 100- pump retarder; 110- main body; 111- high pressure area; 112- low pressure area; 120- rotor;

[0042] 210 - oil tank; 220 - control pump; 230 - flow control valve; 240 - unloading valve; 250 - first one-way valve; 260 - second control valve; 270 - second one-way valve; 281 - first pipeline; 282 - second pipeline; 283 - third pipeline. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0044] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] It should be noted that in the description of the present invention, the terms "connection" and "installation" 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 directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] An embodiment of the present invention provides a loading system for controlling the pump retarder 100 to enter a loading state.

[0047] The pump retarder 100 in the present application is connected to the vehicle, specifically, to the vehicle's transmission system, drive system or vehicle, for retarding speed.

[0048] like Figure 1 As shown, the pump retarder 100 includes a main body 110 and a rotor 120 .

[0049] The main body 110 is provided with a working chamber for the rotor 120 to work, and the working chamber is filled with high-viscosity oil, and optionally, the high-viscosity oil can be engine oil. The rotor 120 is arranged in the working chamber and connected to the transmission system or other structure of the vehicle, and the vehicle can drive the rotor 120 to rotate. When the rotor 120 rotates, the high-viscosity oil in the working chamber can be stirred. At the same time, the rotor 120 divides the working chamber into a high-pressure area 111 and a low-pressure area 112.

[0050] In actual use, the retarder includes two states.

[0051] One state is the loading state, in which the working chamber of the retarder is disconnected from the air. At the same time, the control pump 220 controls the first one-way valve 250 to open, and the control pump 220 controls the unloading valve 240 to close, so as to disconnect the high-pressure area 111 and the low-pressure area 112. The rotor 120 continues to rotate with the vehicle to form a positive displacement pump structure. There is a pressure difference between the high-pressure area 111 and the low-pressure area 112. When the rotor 120 stirs the high-viscosity oil, the high-viscosity oil has damping on the rotor 120, thereby realizing the retarding function.

[0052] Another state is a no-load unloading state. At this time, the high-pressure area 111 and the low-pressure area 112 are connected, and a pressure difference can no longer be established between the high-pressure area 111 and the low-pressure area 112 , so that the high-viscosity oil cannot generate damping on the rotor 120 .

[0053] In this embodiment, Figure 1 As shown, the loading system includes: an oil tank 210 (for storing high-viscosity oil), a control pump 220 , a flow control valve 230 , an unloading valve 240 and a first pipeline 281 .

[0054] The two ends of the first pipeline 281 are connected to the high pressure area 111 and the low pressure area 112 respectively. The unloading valve 240 is arranged on the first pipeline 281 and is used to control the opening and closing of the first pipeline 281. The input port of the control pump 220 is connected to the oil tank 210, and the output port of the control pump 220 is connected to the control port of the unloading valve 240. The control port of the unloading valve 240 is mainly used to control the opening of the unloading valve 240 and control the opening of the unloading valve 240 to control the flow of the first pipeline 281. When the flow is zero, the first pipeline 281 is in an open circuit state. The flow control valve 230 is arranged between the oil outlet and the oil tank 210 and is used to control the flow at the oil outlet.

[0055] When the loading system is loaded, the control pump 220 controls the opening of the unloading valve 240 to decrease (depending on the actual situation, when a smaller torque is required, the opening of the unloading valve 240 can be reduced, and when a larger torque is required, the unloading valve 240 can be directly closed), and the flow of the first pipeline 281 is controlled. At the same time, the opening of the flow control valve 230 is reduced (similarly, depending on the actual situation, when a smaller torque is required, the opening of the flow control valve 230 can be reduced, and when a larger torque is required, the opening of the flow control valve 230 can continue to be reduced).

[0056] Specifically, the control pump 220 controls the first one-way valve 250 to open, and the control pump 220 controls the unloading valve 240 to reduce its opening until it is closed. At the same time, the flow of the flow control valve 230 is also reduced, forming a pressure difference in the working chamber. At the same time, the rotor 120 rotates, and high-viscosity oil is sucked into the working chamber from the oil tank 210, and the air in the working chamber flows out from the oil outlet.

[0057] Meanwhile, in this embodiment, by controlling the pump 220, the first one-way valve 250, the unloading valve 240 and the flow control valve 230, the response is rapid, the control is precise, and the system is practical and reliable.

[0058] In this embodiment, the unloading valve 240 includes a valve body, which is formed with a receiving chamber, in which a piston is arranged, and the piston can slide along the extension direction of the receiving chamber. A control port is arranged at one end of the receiving chamber, and the control port is connected to the output port of the control pump 220, and a compression spring is arranged at the other end of the receiving chamber.

[0059] By increasing the pumping volume of the control pump 220 , the piston can be pushed to slide in the accommodating chamber, thereby controlling the opening of the unloading valve 240 until the unloading valve 240 is closed.

[0060] In actual use, Figure 1 As shown, the flow control valve 230 includes a flow valve and an electromagnetic proportional valve.

[0061] The flow valve is arranged at the oil outlet and is used to control the flow of the oil outlet.

[0062] The electromagnetic proportional valve is connected to the flow valve and controls the opening of the flow valve.

[0063] In this embodiment, if Figure 1 As shown, the loading system further includes a first one-way valve 250. Along the direction from the oil tank 210 to the oil inlet, the control pump 220 and the first one-way valve 250 are sequentially arranged, and the inlet of the first one-way valve 250 is communicated with the output port of the control pump 220, and the outlet of the first one-way valve 250 is communicated with the oil inlet. By arranging the first one-way valve 250, it is possible to prevent the high-viscosity oil in the oil tank 210 from flowing into the working chamber when unloading at no load.

[0064] The control pump 220 can control the opening of the first one-way valve 250. Specifically, when the loading system is loaded, the control pump 220 controls the first one-way valve 250 to open, and the high-viscosity oil in the oil tank 210 enters the working chamber.

[0065] Preferably, Figure 1 As shown, the loading system further includes a third pipeline 283. The first check valve 250 has two inlets, one of which is a control port. The output port of the control pump 220 is connected to the output port of the first check valve 250 and controls the switch of the first check valve 250. The other inlet of the first check valve 250 is connected to one end of the third pipeline 283; the end of the third pipeline 283 away from the first check valve 250 is connected to the oil tank 210, and the high-viscosity oil is sucked into the working chamber through the volume pump structure formed in the working chamber.

[0066] In this embodiment, the working chamber is also connected to the air. Specifically, the loading system further includes a second pipeline 282 for connecting to the outside, and a second control valve 260 for controlling the opening and closing of the second pipeline 282 .

[0067] The main body 110 is provided with a first air hole; one end of the second pipeline 282 is connected to the first air hole, and the other end is connected to the outside; the second control valve 260 is provided on the second pipeline 282, and controls the opening and closing of the second pipeline 282; when the loading system is loaded, the second control valve 260 controls the second pipeline 282 to be disconnected.

[0068] When the loading system is loaded, the second control valve 260 controls the second pipeline 282 to be in an open circuit state to form a closed cavity in the working chamber.

[0069] When the loading system is unloaded, the second control valve 260 controls the second pipeline 282 to be in a passage state, and air enters the working chamber to achieve rapid pressure relief.

[0070] In this embodiment, a bearing installation cavity is provided in the main body 110, a bearing is provided in the bearing installation cavity, an input shaft is provided on the bearing, the rotor 120 is provided on the input shaft, and the output port of the control pump 220 is also connected to the bearing installation cavity, and high-viscosity oil can be pumped into the bearing installation cavity, and the pumped high-viscosity oil can also flow back to the oil storage cavity through other channels.

[0071] In this implementation, if Figure 1 As shown, a second air hole is provided on the oil tank 210. The loading system further includes a second one-way valve 270. The inlet of the second one-way valve 270 is connected to the oil tank 210, and the outlet of the second one-way valve 270 is connected to the outside.

[0072] In this embodiment, when the pump retarder 100 is unloaded, there is a large amount of air in the working chamber. When loading is required, the second control valve 260 and the unloading valve 240 are closed, and the working chamber is sealed. In the process of sucking high-viscosity oil into the working chamber, the air needs to be discharged.

[0073] In actual use, air is discharged from the oil outlet and flows into the oil tank 210 along the pipeline. By setting the second air hole, all the air entering the oil tank 210 can be discharged. At the same time, a second one-way valve 270 is set at the second air hole to prevent external impurities from entering the oil tank 210 and contaminating the high-viscosity oil in the oil tank 210.

[0074] In this embodiment, optionally, a plurality of unloading valves 240 may be provided on the first pipeline 281. The control port of any unloading valve 240 is connected to the control pump 220; any two unloading valves 240 are connected in parallel to improve the working efficiency of the loading system.

[0075] Another embodiment of the present invention further provides a pump retarder 100, comprising the loading system described in the above embodiment.

[0076] Yet another embodiment of the present invention provides a vehicle, comprising the pump retarder 100 described in the above embodiment.

[0077] 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 with 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 loading system, characterized in that: Used in a pump retarder (100), the pump retarder (100) comprising a main body (110) and a rotor (120), the main body (110) being provided with a working chamber filled with high-viscosity oil, the rotor (120) being arranged in the working chamber and being capable of stirring the high-viscosity oil, the rotor (120) dividing the working chamber into a high-pressure area (111) and a low-pressure area (112), and the main body (110) being provided with an oil inlet and an oil outlet communicating with the working chamber; The loading system comprises: an oil tank (210), a control pump (220), a flow control valve (230), an unloading valve (240) and a first pipeline (281); The oil inlet is in communication with the oil tank (210); the two ends of the first pipeline (281) are respectively in communication with the high-pressure area (111) and the low-pressure area (112); the unloading valve (240) is arranged on the first pipeline (281) and is used to control the on-off of the first pipeline (281); the input port of the control pump (220) is connected to the oil tank (210); the output port of the control pump (220) is connected to the control port of the unloading valve (240) and controls the opening of the unloading valve (240); the flow control valve (230) is arranged between the oil outlet and the oil tank (210); When the loading system is loaded, the control pump (220) controls the unloading valve (240) to decrease its opening degree, and the flow control valve (230) to decrease its opening degree.

2. The loading system according to claim 1, characterized in that: The flow control valve (230) comprises a flow valve and an electromagnetic proportional valve; The electromagnetic proportional valve is connected to the flow valve and controls the opening of the flow valve; When the loading system is loaded, the electromagnetic proportional valve controls the flow valve to decrease its opening.

3. The loading system according to claim 1, characterized in that: Also included is a first one-way valve (250); The control pump (220) and the first one-way valve (250) are arranged in sequence along the direction from the oil tank (210) to the oil inlet, and the inlet of the first one-way valve (250) is communicated with the output port of the control pump (220), and the outlet of the first one-way valve (250) is communicated with the oil inlet; The control pump (220) is capable of controlling the opening degree of the first one-way valve (250).

4. The loading system according to claim 3, characterized in that: Also includes a third pipeline (283); The first one-way valve (250) has two inlets, one of which is a control port. The control port of the first one-way valve (250) is connected to the output port of the control pump (220), and the control pump (220) controls the on and off of the first one-way valve (250); Another inlet of the first one-way valve (250) is in communication with one end of the third pipeline (283); One end of the third pipeline (283) away from the first one-way valve (250) is in communication with the oil tank (210).

5. The loading system according to claim 1, characterized in that: Also includes a second pipeline (282) and a second control valve (260); The main body (110) is provided with a first air hole; One end of the second pipeline (282) is connected to the first air hole, and the other end is connected to the air. The second control valve (260) is arranged on the second pipeline (282) and controls the opening and closing of the second pipeline (282); When the loading system is loaded, the second control valve (260) controls the second pipeline (282) to be disconnected.

6. The loading system according to claim 1, characterized in that: A bearing installation cavity is provided in the main body (110), a bearing is provided in the bearing installation cavity, an input shaft is provided on the bearing, and the rotor (120) is provided on the input shaft; The output port of the control pump (220) is also connected to the bearing installation cavity and is capable of pumping high-viscosity oil into the bearing installation cavity.

7. The loading system according to claim 1, characterized in that: The oil tank (210) is provided with a second air hole; The loading system further comprises a second one-way valve (270); The inlet of the second one-way valve (270) is in communication with the oil tank (210), and the outlet of the second one-way valve (270) is in communication with the outside.

8. The loading system according to claim 1, characterized in that: The first pipeline (281) is provided with a plurality of unloading valves (240); A control port of any one of the unloading valves (240) is in communication with the control pump (220); Any two of the unloading valves (240) are connected in parallel.

9. The loading system according to claim 1, characterized in that: The control pump (220) is arranged on the main body (110).

10. A pump retarder, characterized in that: Comprising a loading system as claimed in any one of claims 1 to 9.

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