阅读说明：本技术 停车系统及控制方法 (Parking system and control method ) 是由 龚文 许海翔 薛季爱 李哲一 蒋瑜 于 2019-11-18 设计创作，主要内容包括：本发明提供一种停车系统及控制方法,所述停车系统包括控制器、电动机、液压泵、液压蓄能器、液压油箱、换向阀、液压缸和承载部件。当控制器接收外部指令为上升时,控制器发出上升指令,如液压蓄能器内的第一压力值减去液压缸内的第二压力值大于第一标准值,液压蓄能器供油,反之,液压油箱供油,液压缸驱动承载部件上升；当控制器接收外部指令为下降时,控制器发出下降指令,如液压缸内的第二压力值减去液压蓄能器内的第一压力值大于第二标准值,液压蓄能器接收液压油,反之,液压油箱接收液压油,承载部件下降。所述液压蓄能器具有供油和存油功能,可实现对停车系统运行过程中的能量回收和利用,从而降低设备的能源损耗,提高能源利用率。(The invention provides a parking system and a control method. When the controller receives an external instruction and is a rising instruction, the controller sends a rising instruction, if the first pressure value in the hydraulic accumulator minus the second pressure value in the hydraulic cylinder is larger than a first standard value, the hydraulic accumulator supplies oil, otherwise, the hydraulic oil tank supplies oil, and the hydraulic cylinder drives the bearing part to rise; when the controller receives an external instruction and is descending, the controller sends a descending instruction, if the second pressure value in the hydraulic cylinder minus the first pressure value in the hydraulic accumulator is larger than a second standard value, the hydraulic accumulator receives hydraulic oil, otherwise, the hydraulic oil tank receives the hydraulic oil, and the bearing part descends. The hydraulic accumulator has the functions of oil supply and oil storage, and can realize energy recovery and utilization in the operation process of the parking system, thereby reducing the energy loss of equipment and improving the energy utilization rate.)

1. A parking system, characterized in that it comprises: the hydraulic control system comprises a controller, a motor, a hydraulic pump, a hydraulic oil tank, a hydraulic accumulator, a reversing valve, a hydraulic cylinder and a bearing part; wherein the content of the first and second substances,

the motor and the reversing valve are respectively and electrically connected with the controller;

the motor and the hydraulic oil tank are respectively and mechanically connected with the hydraulic pump;

the hydraulic pump and the hydraulic cylinder are connected in series to form a first circuit, and the first circuit comprises a first oil supply path and a first oil return path; the hydraulic accumulator is connected with the hydraulic cylinder in series to form a second loop;

the reversing valve comprises a first reversing valve, a second reversing valve and a third reversing valve, the first reversing valve is arranged in the first oil return path, the second reversing valve is arranged in the first oil supply path, and the third reversing valve is arranged in the second loop;

the bearing part is arranged on the hydraulic cylinder and can be lifted or descended under the action of the hydraulic cylinder.

2. The parking system of claim 1, further comprising a first pressure sensor and a second pressure sensor;

the first pressure sensor is connected with the hydraulic accumulator and used for detecting a first pressure value of the hydraulic accumulator and transmitting the first pressure value to the controller;

the second pressure sensor is connected with the hydraulic cylinder and used for detecting a second pressure value of the bearing part and transmitting the second pressure value to the controller;

the controller controls the opening and closing of the reversing valve according to the first pressure value and/or the second pressure value.

3. The parking system as recited in claim 1, further comprising a relief valve connected in parallel with said hydraulic tank in said first supply path; when the oil pressure value in the first oil supply path exceeds a set safety value, the overflow valve is opened, and the oil in the first oil supply path flows back to the hydraulic oil tank until the oil pressure value in the first oil supply path is recovered to the set safety value.

4. The parking system of claim 1, wherein said hydraulic pump, said hydraulic accumulator, said directional control valve and said hydraulic cylinder are connected by hydraulic lines;

the first circuit is connected through two hydraulic pipelines, and the second circuit is connected through one hydraulic pipeline.

5. The parking system of claim 1, wherein said hydraulic tank has an oil inlet port in communication with said first oil return path and an oil outlet port connected to said hydraulic pump in communication with said first oil supply path.

6. The parking system of claim 1, wherein said hydraulic accumulator has a port communicating with a second circuit through which hydraulic oil may flow into or out of said hydraulic accumulator.

7. The parking system of claim 1, wherein said hydraulic cylinder is a ram cylinder.

8. The parking system of claim 1, wherein said first directional valve, said second directional valve and said third directional valve are two-position, two-way electromagnetic directional valves.

9. A parking system control method using the parking system according to any one of claims 1 to 8, comprising:

the method comprises the following steps: the controller sends out a rising instruction;

step two: the controller acquires a second pressure value of the hydraulic cylinder;

when the second pressure value is larger than the maximum allowable pressure value, the controller sends an overload alarm signal and a stop instruction;

when the second pressure value is smaller than or equal to the maximum allowable pressure value, the controller acquires a first pressure value of the hydraulic accumulator;

when the difference value of subtracting the second pressure value from the first pressure value is larger than a first standard value, the third reversing valve is opened, hydraulic oil in the hydraulic accumulator flows to the hydraulic cylinder through a second loop, and the hydraulic cylinder jacks the bearing part to a set position;

when the difference value of subtracting the second pressure value from the first pressure value is smaller than or equal to a first standard value, the second reversing valve is opened, the motor is started to drive the hydraulic pump to output hydraulic oil in the hydraulic oil tank, the hydraulic oil flows to the hydraulic cylinder through the first oil supply path, and the hydraulic cylinder jacks the bearing component to a set position;

step three: the controller sends out a descending instruction;

step four: the controller obtains a second pressure value of the hydraulic cylinder and a first pressure value of the hydraulic accumulator;

when the difference value obtained by subtracting the first pressure value from the second pressure value is larger than a second standard value, the third reversing valve is opened, the oil in the hydraulic cylinder flows into the hydraulic accumulator through a second loop, and the bearing part descends to the initial position;

when the difference value of subtracting the first pressure value from the second pressure value is smaller than or equal to a second standard value, the first reversing valve is opened, oil in the hydraulic cylinder flows to the hydraulic oil tank through the first return path, and the bearing part descends to an initial position.

10. The parking system control method as recited in claim 9, wherein said first standard value is 2Mpa, and said second standard value is more than 1Mpa and less than 2 Mpa.

Technical Field

The invention relates to the technical field of parking equipment, in particular to a parking system and a control method.

Background

With the rapid development of economy in China, the number of automobiles of urban residents is continuously increased, the automobile holding amount is rapidly increased, parking resources are seriously insufficient, and mechanical parking equipment is rapidly developed and rapidly increased in number in nearly ten years for solving the problem of difficulty in parking in cities. The hydraulic system has the advantages of small volume, light weight, low noise, easy realization of automatic control, easy integration and the like, and is widely applied to the lifting system of mechanical parking equipment. At present, mechanical type parking equipment lift hydraulic system all adopts the energy supply that the throttle mode realized going up and down, nevertheless at load potential energy decline in-process, a large amount of energy can be consumed to the mode of throttle, not only can cause the system to generate heat, causes the waste of energy moreover.

Therefore, a parking system and a control method are needed to solve the problem of energy waste and achieve energy recycling, so that the parking system is more energy-saving, the energy consumption of equipment is reduced, and the energy utilization rate is improved.

Disclosure of Invention

The invention aims to provide a parking system and a control method, which aim to solve the problem of energy loss of a lifting system of parking equipment.

In order to solve the above technical problem, the present invention provides a parking system, including: the hydraulic control system comprises a controller, a motor, a hydraulic pump, a hydraulic oil tank, a hydraulic accumulator, a reversing valve, a hydraulic cylinder and a bearing part; wherein the content of the first and second substances,

the motor and the reversing valve are respectively and electrically connected with the controller;

the motor and the hydraulic oil tank are respectively and mechanically connected with the hydraulic pump;

the hydraulic pump and the hydraulic cylinder are connected in series to form a first circuit, and the first circuit comprises a first oil supply path and a first oil return path;

the hydraulic accumulator is connected with the hydraulic cylinder in series to form a second loop;

the reversing valve comprises a first reversing valve, a second reversing valve and a third reversing valve, the first reversing valve is arranged in the first oil return path, the second reversing valve is arranged in the first oil supply path, and the third reversing valve is arranged in the second loop;

the bearing part is arranged on the hydraulic cylinder and can be lifted or descended under the action of the hydraulic cylinder.

Optionally, in the parking system, the parking system further includes a first pressure sensor and a second pressure sensor;

the first pressure sensor is connected with the hydraulic accumulator and used for detecting a first pressure value of the hydraulic accumulator and transmitting the first pressure value to the controller;

the second pressure sensor is connected with the hydraulic cylinder and used for detecting a second pressure value of the bearing part and transmitting the second pressure value to the controller;

the controller controls the opening and closing of the reversing valve according to the first pressure value and/or the second pressure value.

Optionally, in the parking system, the parking system further includes an overflow valve, and in the first oil supply path, the overflow valve is connected in parallel with the hydraulic oil tank; when the oil pressure value in the first oil supply path exceeds a set safety value, the overflow valve is opened, and the oil in the first oil supply path flows back to the hydraulic oil tank until the oil pressure value in the first oil supply path is recovered to the set safety value.

Optionally, in the parking system, the hydraulic pump, the hydraulic accumulator, the reversing valve and the hydraulic cylinder are connected through hydraulic pipes;

the first circuit is connected through two hydraulic pipelines, and the second circuit is connected through one hydraulic pipeline.

Optionally, in the parking system, the hydraulic oil tank has an oil inlet port and an oil outlet port, the oil inlet port is communicated with the first oil return path, and the oil outlet port is connected to the hydraulic pump and communicated with the first oil supply path.

Optionally, in the parking system, the hydraulic accumulator has a port, and the port communicates with the second circuit, and hydraulic oil can flow into or out of the hydraulic accumulator through the port.

Optionally, in the parking system, the hydraulic cylinder is a plunger type hydraulic cylinder.

Optionally, in the parking system, the first direction valve, the second direction valve, and the third direction valve are two-position two-way electromagnetic direction valves.

Based on the same inventive concept, the invention also provides a parking system control method, which comprises the following steps:

the method comprises the following steps: the controller sends out a rising instruction;

step two: the controller acquires a second pressure value of the hydraulic cylinder;

when the second pressure value is larger than the maximum allowable pressure value, the controller sends an overload alarm signal and a stop instruction;

when the second pressure value is smaller than or equal to the maximum allowable pressure value, the controller acquires a first pressure value of the hydraulic accumulator;

when the difference value of subtracting the second pressure value from the first pressure value is larger than a first standard value, the third reversing valve is opened, hydraulic oil in the hydraulic accumulator flows to the hydraulic cylinder through a second loop, and the hydraulic cylinder jacks the bearing part to a set position;

when the difference value of subtracting the second pressure value from the first pressure value is smaller than or equal to a first standard value, the second reversing valve is opened, the motor is started to drive the hydraulic pump to output hydraulic oil in the hydraulic oil tank, the hydraulic oil flows to the hydraulic cylinder through the first oil supply path, and the hydraulic cylinder jacks the bearing component to a set position;

step three: the controller sends out a descending instruction;

step four: the controller obtains a second pressure value of the hydraulic cylinder and a first pressure value of the hydraulic accumulator;

when the difference value obtained by subtracting the first pressure value from the second pressure value is larger than a second standard value, the third reversing valve is opened, the oil in the hydraulic cylinder flows into the hydraulic accumulator through a second loop, and the bearing part descends to the initial position;

when the difference value of subtracting the first pressure value from the second pressure value is smaller than or equal to a second standard value, the first reversing valve is opened, oil in the hydraulic cylinder flows to the hydraulic oil tank through the first return path, and the bearing part descends to an initial position.

Optionally, in the parking system control method, the first standard value is 2Mpa, and the second standard value is greater than 1Mpa and less than 2 Mpa.

In summary, the present invention provides a parking system and a control method of the parking system, where the parking system includes a controller, an electric motor, a hydraulic pump, a hydraulic accumulator, a hydraulic tank, a directional valve, a hydraulic cylinder, and a bearing member. When the controller receives an external instruction and is ascending, the controller sends an ascending instruction, if the first pressure value in the hydraulic accumulator minus the second pressure value in the hydraulic cylinder is larger than a first standard value, the hydraulic accumulator supplies oil, otherwise, the hydraulic oil tank supplies oil, and the hydraulic cylinder receives hydraulic oil to drive the bearing part to ascend; when the controller receives an external instruction and is descending, the controller sends a descending instruction, if the second pressure value in the hydraulic cylinder minus the first pressure value in the hydraulic accumulator is larger than a second standard value, the hydraulic accumulator receives hydraulic oil, otherwise, the hydraulic oil tank receives hydraulic oil, and the bearing component descends. The hydraulic accumulator has the functions of oil supply and oil storage, and can realize energy recovery and utilization in the operation process of the parking system, thereby reducing the energy loss of equipment and improving the energy utilization rate.

Drawings

FIG. 1 is a schematic view of a parking system according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating a method for controlling a load ascending in a parking system according to an embodiment of the present invention;

fig. 3 is a flowchart for controlling a load drop in the parking system control method according to the embodiment of the present invention;

wherein the reference numerals are as follows:

1-a controller;

21-an electric motor; 22-a hydraulic pump; 23-a hydraulic oil tank;

31-a hydraulic accumulator; 32-a first pressure sensor;

41-a first direction valve; 42-a second directional valve; 43-a third directional valve; 44-relief valve;

51-a carrier member; 52-hydraulic cylinder; 53-a second pressure sensor;

a-a first oil supply path; b-a first oil return path; c-a second loop.

Detailed Description

As mentioned above, in the process of lowering the load potential energy, the conventional parking equipment lifting hydraulic system consumes a large amount of energy in a throttling manner, which not only causes overheating of the system, but also causes waste of energy.

Therefore, the invention provides the parking system and the control method, which can recycle the energy, avoid energy waste, save energy and protect environment.

The parking system and the control method according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

Referring to fig. 1, the present embodiment provides a parking system, which mainly includes: the hydraulic control system comprises a controller 1, an electric motor 21, a hydraulic pump 22, a hydraulic oil tank 23, a hydraulic accumulator 31, a first reversing valve 41, a second reversing valve 42, a third reversing valve 43, a bearing part 51 and a hydraulic cylinder 52. Wherein the electric motor 21, the first direction switching valve 41, the second direction switching valve 42, and the third direction switching valve 43 are electrically connected to the controller 1, respectively.

In this embodiment of the present application, the controller 1 may adopt any device capable of implementing a control function in the prior art, and its main function is to receive a signal and send an instruction to each component in the parking system, which is not described herein again. For example, the controller 1 may be a programmable logic device, etc., and the software and hardware portions thereof may all adopt the prior art, or make some simple improvements on the prior art, which is not limited in this application.

The electric motor 21 and the hydraulic oil tank 23 are mechanically connected to the hydraulic pump 22, respectively. When the hydraulic oil tank 23 supplies oil, the electric motor 21 drives the hydraulic pump 22 to do work, so that the hydraulic oil in the hydraulic oil tank 23 flows out to a hydraulic pipeline, and hydraulic energy is provided for a parking system to lift a load. Further, the hydraulic pump 22 is connected in series with the hydraulic cylinder 52 to form a first circuit including a first oil supply path a and a first oil return path b. The first direction valve 41 is disposed in the first oil return path b, and is configured to control opening or closing of a path through which the hydraulic oil in the hydraulic cylinder 52 flows back to the hydraulic oil tank 23. The second direction change valve 42 is provided in the first oil supply path a, and controls opening or closing of a path through which the hydraulic oil is supplied from the hydraulic oil tank 23 to the hydraulic cylinder 52 via the hydraulic pump 22. Further, the parking system further includes a relief valve 44, and the relief valve 44 is connected in parallel with the hydraulic oil tank 23 in the first oil supply path a. The overflow valve 44 is communicated with the first oil supply path a and the hydraulic oil tank 23, when the oil pressure value in the first oil supply path a exceeds a set safety value, the overflow valve 44 is opened, the hydraulic oil in the first oil supply path a flows back into the hydraulic oil tank 23 until the oil pressure value in the first oil supply path a is restored to the set safety value, and the overflow valve 44 is closed. The overflow valve is used for ensuring the stability of oil pressure in the first oil supply path a, so that the stability of the whole parking system is ensured.

The hydraulic accumulator 31 is connected in series with the hydraulic cylinder 51 to form a second circuit c. The hydraulic accumulator is used for recovering or releasing hydraulic energy in the lifting process of the system so as to realize graded supply of hydraulic oil and recovery of the hydraulic oil, and when the energy stored in the hydraulic accumulator 31 is enough to realize energy required by lifting, the hydraulic accumulator 31 supplies energy, otherwise, the hydraulic oil tank 23 supplies energy. When the load descends, the gravitational potential energy is converted into hydraulic energy, if the hydraulic energy is enough and the energy stored in the hydraulic accumulator 31 is less, the hydraulic energy can be directly stored in the hydraulic accumulator 31, otherwise, the hydraulic oil in the hydraulic cylinder 52 flows back to the hydraulic oil tank 23. The third direction change valve 43 is provided in the second circuit c for controlling opening and closing of the flow of hydraulic oil between the hydraulic accumulator 31 and the hydraulic cylinder 52.

Further, in order to measure the storage condition of the hydraulic oil in the hydraulic accumulator 31, the parking system further includes a first pressure sensor 32, and the first pressure sensor 32 is mechanically connected to the hydraulic accumulator 31. The first pressure sensor 32 detects the amount of oil pressure in the hydraulic accumulator 31 and transmits the detected amount as an input signal to the controller 1. The hydraulic energy stored in the hydraulic accumulator 31 is indirectly obtained by detecting the oil pressure in the hydraulic accumulator 31. The controller 1 may further determine whether to supply or store oil from the hydraulic accumulator 31 by comparing the first pressure value with the second pressure value.

The carrier 51 is disposed on the hydraulic cylinder 52 and can be raised or lowered by the hydraulic cylinder 52. The bearing part 51 is a vehicle-carrying steel plate in the parking system and used for parking a vehicle, and the hydraulic cylinder 52 is a plunger type hydraulic cylinder and can realize unidirectional lifting and is used for jacking or descending the bearing part 51. A second pressure sensor 53 is further arranged at the oil port of the hydraulic cylinder 52, and the second pressure sensor 53 is mechanically connected with the hydraulic cylinder 52. The second pressure sensor 53 is used for measuring the pressure value in the hydraulic cylinder 52 and transmitting the pressure value to the controller 1. The pressure value detected by the second pressure sensor 53 is defined as a second pressure value, which corresponds to the bearing pressure of the bearing component 51. After the controller 1 obtains the second pressure value, it may further determine whether to provide hydraulic oil from the hydraulic oil tank 23 or receive hydraulic oil or to provide hydraulic oil from the hydraulic accumulator 31 or store hydraulic oil.

Further, the first direction valve 41, the second direction valve 42, and the third direction valve 43 are all two-position two-way electromagnetic direction valves.

Based on the same inventive concept, the present embodiment further provides a parking system control method, which includes the following steps (see fig. 2 and 3):

step one S10: the controller 1 receives an external instruction, namely, the external instruction is ascending, and sends an ascending instruction to each component, each component receives the instruction, the first pressure sensor 32 detects a first pressure value in the hydraulic accumulator 31, and the second pressure sensor 53 detects a second pressure value in the hydraulic cylinder 52;

step two S20: the controller 1 acquires a second pressure value of the hydraulic cylinder 52;

when the second pressure value is larger than the maximum allowable pressure value, the controller 1 sends an overload alarm signal and a stop instruction to each component;

when the second pressure value is less than or equal to the maximum allowable pressure value, the controller 1 obtains a first pressure value of the hydraulic accumulator 31;

when the first pressure value minus the second pressure value is greater than the first standard value, that is, it is said that the oil amount in the hydraulic accumulator 31 is sufficient to support the bearing member 51 to rise to the set position, so the third directional valve 43 is opened, the hydraulic oil in the hydraulic accumulator 31 flows to the hydraulic cylinder 52 through the second loop c, the hydraulic cylinder 52 lifts the bearing member 51 to the set position, the hydraulic energy provided by the hydraulic accumulator 31 is converted into the gravitational potential energy of the bearing member 51, and the stored energy of the hydraulic accumulator 31 is utilized;

when the first pressure value minus the second pressure value is less than or equal to the first standard value, that is, the oil amount in the hydraulic accumulator 31 is small and cannot support the bearing member 51 to rise to the set position, the oil is supplied from the hydraulic oil tank 23, so the second directional control valve 42 is opened, the electric motor 21 is started to apply work through the hydraulic pump 22, the oil in the hydraulic oil tank 23 flows to the hydraulic cylinder 52 through the first oil supply path a, the bearing member rises to the set position, and the hydraulic energy provided by the hydraulic oil tank 23 is converted into gravitational potential energy of the bearing member 51;

step three S30: the controller 1 receives an external instruction, namely, a descending instruction is sent to each component, each component receives the instruction, the first pressure sensor 32 detects a first pressure value in the hydraulic accumulator 31, and the second pressure sensor 53 detects a second pressure value in the hydraulic cylinder 52;

step four S40: the controller 1 acquires a second pressure value of the hydraulic cylinder 52 and a first pressure value of the hydraulic accumulator 31;

when the second pressure value minus the first pressure value is greater than a second standard value, that is, it is described that the gravitational potential energy of the bearing member 51 is greater, and the gravitational potential energy is greater when the heights are equal, in order to avoid that the thermal energy generated when the gravitational potential energy is converted into hydraulic energy is too great and the energy loss is too great, the hydraulic energy accumulator 31 may store the hydraulic energy converted from the gravitational potential energy, so the third directional control valve 43 is opened, the hydraulic oil in the hydraulic cylinder 52 flows into the hydraulic energy accumulator 31 through the second loop c, and the bearing member 51 descends to an initial position;

when the second pressure value minus the first pressure value is less than or equal to a second standard value, that is, the gravitational potential energy is small, the gravitational potential energy can only be converted into necessary friction heat energy generated when the bearing member descends to the initial position, and in order to ensure that the bearing member 51 can descend to the initial position, the hydraulic accumulator 31 does not store the energy, so the first direction valve 41 is opened, the oil in the hydraulic cylinder 52 flows to the hydraulic oil tank 23 through the first oil return path b, and the bearing member 51 descends to the initial position.

Further, the first standard value is preferably 2MPa, and the second standard value is greater than 1MPa and less than 2MPa, preferably 1.5MPa, depending on factors such as the actual vehicle load range, the self weight of the vehicle-carrying steel plate, and the lifting height range of the parking system.

In conclusion, the parking system that this embodiment provided, realization that can be reasonable is to the recovery and the utilization of energy in parking operating system, reduces the loss of the equipment energy, improves energy utilization.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.