Hydraulic control system and method for automatic matching of hydraulic clutch and hydraulic brake

Abstract

The invention discloses a hydraulic control system and method for automatic matching of a hydraulic clutch and a hydraulic brake. The hydraulic control system comprises an oil tank assembly, an electric proportional pressure reducing valve and a hydraulic control pressure reducing valve. The electric proportional pressure reducing valve is a three-way type proportional pressure reducing valve, and the hydraulic control pressure reducing valve is a three-way pressure reducing valve. The oil inlet end of the one-way valve communicates with the oil tank assembly through the pump set, and the oil outlet end of the one-way valve communicates with the energy accumulator, an oil inlet P of the electric proportional pressure reducing valve and an oil inlet P of the hydraulic control pressure reducing valve. An oil outlet A of the electric proportional pressure reducing valve communicates with a control port X of the hydraulic control pressure reducing valve and the brake set, and one end of the brake releasing electromagnetic valve communicates with the brake set. An oil outlet A of the hydraulic control pressure reducing valve and one end of the clutch releasing electromagnetic valve are communicated with the clutch set, and the other end of the clutch releasing electromagnetic valve, the other end of the brake releasing electromagnetic valve and an oil return opening T of the electric proportional pressure reducing valve are communicated with the oil tank assembly. The function that the clutch is automatically engaged while the brake is released can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic control, and in particular to a hydraulic control system and method for automatic matching of a hydraulic clutch and a hydraulic brake. Background Art

[0002] In the power generation system of an energy storage system, there's a need for brake and clutch switching during the lifting and handling of heavy objects. Currently, the brake and clutch are often controlled separately, which can easily lead to the clutch engaging before the brake is released, or the clutch not engaging after the brake is released, causing the equipment to stall. Therefore, how to achieve automatic clutch engagement when the brake is released has become a pressing challenge. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulic control system and method for automatic matching of hydraulic clutch and hydraulic brake, which has a simple structure and can realize the function of automatic engagement of clutch when the brake is released, meeting the use requirements of equipment braking and clutch.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A hydraulic control system for automatic matching of hydraulic clutch and hydraulic brake of the present invention has the following innovations: it includes a fuel tank assembly, a pump group, a one-way valve, an accumulator, an electric proportional pressure reducing valve, a hydraulically controlled pressure reducing valve, a brake release solenoid valve and a clutch release solenoid valve; the electric proportional pressure reducing valve is a three-way proportional pressure reducing valve, and the hydraulically controlled pressure reducing valve is a three-way pressure reducing valve; the oil inlet end of the one-way valve is connected to the fuel tank assembly through the pump group, and its oil outlet end is connected to the oil inlet P of the accumulator, the electric proportional pressure reducing valve and the oil inlet P of the hydraulically controlled pressure reducing valve through pipelines. ; The brake release solenoid valve and the clutch release solenoid valve are both normally open two-position two-way solenoid valves, and the oil outlet A of the electric proportional pressure reducing valve is connected to the control port X of the hydraulic pressure reducing valve and the oil inlet of the brake group through pipelines, and one end of the brake release solenoid valve is connected to the oil port of the brake group through a pipeline; the oil outlet A of the hydraulic pressure reducing valve and one end of the clutch release solenoid valve are connected to the oil port of the clutch group through pipelines, and the other end of the clutch release solenoid valve, the other end of the brake release solenoid valve and the oil return port T of the electric proportional pressure reducing valve are connected to the oil tank assembly through pipelines.

[0005] Preferably, the pump group can be a gear pump group or a plunger pump group.

[0006] Preferably, a high-pressure filter is provided on the pipeline between the pump group and the one-way valve, and the hydraulic oil pumped out by the pump group is filtered by the high-pressure filter.

[0007] Preferably, it also includes a relief valve; the relief valve can be a battery relief valve or an electric proportional relief valve, and one end of the relief valve is connected to the pipeline located between the high-pressure filter and the one-way valve, and the other end is connected to the oil tank assembly through a pipeline, and then the pressure is relieved through the relief valve.

[0008] Preferably, the brake group may be one brake, two brakes or multiple brakes, and the clutch group may be one clutch, two clutches or multiple clutches.

[0009] The hydraulic control method of the hydraulic control system for automatically matching a hydraulic clutch and a hydraulic brake of the present invention is innovative in that it comprises the following steps: Step 1: First, the brake release solenoid valve, clutch release solenoid valve, and electric proportional pressure reducing valve are all de-energized. At this time, the oil inlet P of the electric proportional pressure reducing valve is connected to its oil return port T, and the brake release solenoid valve and clutch release solenoid valve are both in the closed state; at this time, the brake group is in the holding braking state due to the action of the internal spring, and the clutch group is in the disengaged state due to the action of the internal spring; Step 2: Then the pump group starts to pump out the hydraulic oil in the oil tank assembly, and after being filtered by the high-pressure filter, it flows to the accumulator, the oil inlet P of the electric proportional pressure reducing valve, and the oil inlet P of the hydraulically controlled pressure reducing valve respectively; Step 3: Then the electric proportional pressure reducing valve is energized, and its oil inlet P is connected to its working port A; at the same time, the brake release solenoid valve and the clutch release solenoid valve are energized, and both are in the disconnected state; Step 4: Then the hydraulic oil at the oil inlet P of the electric proportional pressure reducing valve flows to the brake group and the control port X of the hydraulic pressure reducing valve through its working port A, and the brake group is released. At the same time, the oil inlet P of the hydraulic pressure reducing valve is connected with its working port A. At this time, the hydraulic oil at the oil inlet P of the hydraulic pressure reducing valve flows to the clutch group through its working port A, and the clutch group is automatically engaged.

[0010] Preferably, in the above step 2, when the hydraulic pressure is higher than the set value, the hydraulic oil is depressurized back into the oil tank assembly through the relief valve.

[0011] Preferably, in the above step 4, the brake group and the braking degree as well as the engagement degree of the clutch group change with the current of the electric proportional pressure reducing valve, thereby achieving an automatic matching function of braking and engagement.

[0012] Beneficial effects of the present invention: The present invention has a simple structure and can realize the function of automatically engaging the clutch while the brake is released, thus meeting the use requirements of equipment braking and clutching. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of a hydraulic control system for automatic matching of a hydraulic clutch and a hydraulic brake according to the present invention.

[0015] Among them, 1- oil tank assembly; 2- pump group; 3- high-pressure filter; 4- overflow valve; 5- one-way valve; 6- accumulator; 7- electric proportional pressure reducing valve; 8- hydraulically controlled pressure reducing valve; 9- brake release solenoid valve; 10- clutch release solenoid valve; 11- brake group; 12- clutch group. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below through specific implementation methods.

[0017] The present invention relates to a hydraulic control system for automatically matching a hydraulic clutch with a hydraulic brake, comprising a fuel tank assembly 1, a pump assembly 2, a one-way valve 5, an accumulator 6, an electric proportional pressure reducing valve 7, a hydraulically controlled pressure reducing valve 8, a brake release solenoid valve 9, and a clutch release solenoid valve 10. The specific structure is as follows: Figure 1 As shown, the electric proportional pressure reducing valve 7 is a three-way proportional pressure reducing valve, and the hydraulically controlled pressure reducing valve 8 is a three-way pressure reducing valve; the oil inlet end of the one-way valve 5 is connected to the oil tank assembly 1 through the pump group 2, and its oil outlet end is connected to the accumulator 6, the oil inlet P of the electric proportional pressure reducing valve 7, and the oil inlet P of the hydraulically controlled pressure reducing valve 8 through pipelines; the brake release solenoid valve 9 and the clutch release solenoid valve 10 are both normally open two-position two-way solenoid valves, and the oil outlet A of the electric proportional pressure reducing valve 7 is connected to the control port X of the hydraulically controlled pressure reducing valve 8 and the oil inlet of the brake group 11 through pipelines, and one end of the brake release solenoid valve 9 is connected to the oil port of the brake group 11 through a pipeline; the oil outlet A of the hydraulically controlled pressure reducing valve 8 and one end of the clutch release solenoid valve 10 are connected to the oil port of the clutch group 12 through pipelines, respectively, and the other end of the clutch release solenoid valve 10, the other end of the brake release solenoid valve 9, and the oil return port T of the electric proportional pressure reducing valve 7 are connected to the oil tank assembly 1 through pipelines. Among them, the pump group 2 can be a gear pump group 2 or a plunger pump group 2; the brake group 11 can be one brake, two brakes or multiple brakes, and the clutch group 12 can be one clutch, two clutches or multiple clutches.

[0018] like Figure 1 As shown, a high-pressure filter 3 is provided on the pipeline between the pump group 2 and the one-way valve 5, and the hydraulic oil pumped out by the pump group 2 is filtered by the high-pressure filter 3.

[0019] like Figure 1 As shown, the overflow valve 4 can be a battery overflow valve 4 or an electric proportional overflow valve 4, and one end of the overflow valve 4 is connected to the pipeline between the high-pressure filter 3 and the one-way valve 5, and the other end is connected to the oil tank assembly 1 through the pipeline, and then the pressure is released through the overflow valve 4.

[0020] The present invention provides a hydraulic control method for a hydraulic control system with automatic matching of a hydraulic clutch and a hydraulic brake, such as Figure 1 As shown, the following steps are included: Step 1: First, the brake solenoid valve 9, the clutch solenoid valve 10 and the electric proportional pressure reducing valve 7 are all in the de-energized state. At this time, the oil inlet P of the electric proportional pressure reducing valve 7 is connected with its oil return port T, and the brake solenoid valve 9 and the clutch solenoid valve 10 are both in the closed state; at this time, the brake group 11 is in the holding braking state due to the action of the internal spring, and the clutch group 12 is in the separation state due to the action of the internal spring.

[0021] Step 2: Then the pump group 2 is started to pump out the hydraulic oil in the oil tank assembly 1. After being filtered by the high-pressure filter 3, the oil flows to the accumulator 6, the oil inlet P of the electric proportional pressure reducing valve 7, and the oil inlet P of the hydraulic pressure reducing valve 8 respectively; In the above steps, when the hydraulic pressure is higher than the set value, the hydraulic oil is depressurized back into the oil tank assembly 1 through the relief valve 4 .

[0022] Step 3: Then the electric proportional pressure reducing valve 7 is energized, and its oil inlet P is connected to its working port A; at the same time, the brake release solenoid valve 9 and the clutch release solenoid valve 10 are energized, and both are in the disconnected state.

[0023] Step 4: Then the hydraulic oil at the oil inlet P of the electric proportional pressure reducing valve 7 flows to the brake group 11 and the control port X of the hydraulic pressure reducing valve 8 through its working port A, and the brake group 11 is released. At the same time, the oil inlet P of the hydraulic pressure reducing valve 8 is connected with its working port A. At this time, the hydraulic oil at the oil inlet P of the hydraulic pressure reducing valve 8 flows to the clutch group 12 through its working port A, and the clutch group 12 is automatically engaged.

[0024] In the above steps, the braking degree of the brake group 11 and the engagement degree of the clutch group 12 change with the current of the electric proportional pressure reducing valve 7, thereby achieving the automatic matching function of braking and engagement.

[0025] Beneficial effects of the present invention: The present invention has a simple structure and can realize the function of automatically engaging the clutch while the brake is released, thus meeting the use requirements of equipment braking and clutching.

[0026] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary engineering technicians in this field should fall within the scope of protection of the present invention. The technical contents to be protected by the present invention have been fully recorded in the technical requirements.

Claims

1. A hydraulic control system with automatic matching of hydraulic clutch and hydraulic brake, characterized by: It includes a fuel tank assembly, a pump group, a one-way valve, an accumulator, an electric proportional pressure reducing valve, a hydraulic pressure reducing valve, a brake release solenoid valve and a clutch release solenoid valve; the electric proportional pressure reducing valve is a three-way proportional pressure reducing valve, and the hydraulic pressure reducing valve is a three-way pressure reducing valve; the oil inlet end of the one-way valve is connected to the fuel tank assembly through the pump group, and its oil outlet end is connected to the accumulator, the oil inlet P of the electric proportional pressure reducing valve and the oil inlet P of the hydraulic pressure reducing valve through pipelines; the brake release solenoid valve and the clutch release solenoid valve are both normally open two-position two-way electric solenoid valve, and the oil outlet A of the electric proportional pressure reducing valve is connected to the control port X of the hydraulic pressure reducing valve and the oil inlet of the brake group through pipelines, and one end of the brake release solenoid valve is connected to the oil port of the brake group through a pipeline; the oil outlet A of the hydraulic pressure reducing valve and one end of the clutch release solenoid valve are connected to the oil port of the clutch group through pipelines, and the other end of the clutch release solenoid valve, the other end of the brake release solenoid valve and the oil return port T of the electric proportional pressure reducing valve are connected to the oil tank assembly through pipelines.

2. A hydraulic control system for automatic matching of hydraulic clutch and hydraulic brake according to claim 1, characterized in that: The pump group can be a gear pump group or a plunger pump group.

3. The hydraulic control system for automatic matching of hydraulic clutch and hydraulic brake according to claim 1, characterized in that: A high-pressure filter is also provided on the pipeline between the pump group and the one-way valve, and the hydraulic oil pumped out by the pump group is filtered by the high-pressure filter.

4. The hydraulic control system for automatic matching of hydraulic clutch and hydraulic brake according to claim 3, characterized in that: It also includes a relief valve; the relief valve can be a battery relief valve or an electric proportional relief valve, and one end of the relief valve is connected to the pipeline located between the high-pressure filter and the one-way valve, and the other end is connected to the oil tank assembly through a pipeline, and then the pressure is relieved through the relief valve.

5. The hydraulic control system for automatic matching of hydraulic clutch and hydraulic brake according to claim 1, characterized in that: The brake group may be one brake, two brakes, or a plurality of brakes, and the clutch group may be one clutch, two clutches, or a plurality of clutches.

6. The hydraulic control method of a hydraulic control system for automatic matching of hydraulic clutch and hydraulic brake according to claim 4, characterized in that The following steps are involved: Step 1: First, the brake release solenoid valve, clutch release solenoid valve, and electric proportional pressure reducing valve are all de-energized. At this time, the oil inlet P of the electric proportional pressure reducing valve is connected to its oil return port T, and the brake release solenoid valve and clutch release solenoid valve are both in the closed state; at this time, the brake group is in the holding braking state due to the action of the internal spring, and the clutch group is in the disengaged state due to the action of the internal spring; Step 2: Then the pump group starts to pump out the hydraulic oil in the oil tank assembly, and after being filtered by the high-pressure filter, it flows to the accumulator, the oil inlet P of the electric proportional pressure reducing valve, and the oil inlet P of the hydraulically controlled pressure reducing valve respectively; Step 3: Then the electric proportional pressure reducing valve is energized, and its oil inlet P is connected to its working port A; at the same time, the brake release solenoid valve and the clutch release solenoid valve are energized, and both are in the disconnected state; Step 4: Then the hydraulic oil at the oil inlet P of the electric proportional pressure reducing valve flows to the brake group and the control port X of the hydraulic pressure reducing valve through its working port A, and the brake group is released. At the same time, the oil inlet P of the hydraulic pressure reducing valve is connected with its working port A. At this time, the hydraulic oil at the oil inlet P of the hydraulic pressure reducing valve flows to the clutch group through its working port A, and the clutch group is automatically engaged.

7. The hydraulic control method of a hydraulic control system with automatic matching of hydraulic clutch and hydraulic brake according to claim 6, characterized in that: In the above step 2, when the hydraulic pressure is higher than the set value, the hydraulic oil is released back into the oil tank assembly through the relief valve.

8. The hydraulic control method of a hydraulic control system with automatic matching of hydraulic clutch and hydraulic brake according to claim 6, characterized in that: In the above step 4, the brake group and the braking degree as well as the engagement degree of the clutch group change with the current of the electric proportional pressure reducing valve, thereby achieving the automatic matching function of braking and engagement.

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