CN213575414U

CN213575414U - Multimode hydraulic drive power system

Info

Publication number: CN213575414U
Application number: CN202022286289.1U
Authority: CN
Inventors: 李立敏; 刘春鹏; 乔振扬; 王山明; 侯东涛; 吴帅刚; 王愿望; 王博; 王成龙
Original assignee: Zhengzhou Zhengyu Heavy Industry Co ltd
Current assignee: Yutong heavy equipment Co.,Ltd.
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-06-29
Anticipated expiration: 2030-10-14

Abstract

The utility model provides a multimode hydraulic drive power system, wherein the power system comprises a hydraulic pump for driving the hydraulic system and an engine for driving the hydraulic pump, and an output shaft of the engine is connected with the hydraulic pump through a transmission mechanism; the engine drives at least two hydraulic pumps arranged in parallel; the hydraulic pump also comprises at least one driving motor, and each driving motor is connected with at least one hydraulic pump through a transmission mechanism capable of being switched on and off. The utility model discloses have two at least hydraulic pumps, driving system adaptability is stronger, makes hydraulic system arrange the restriction that breaks away from the physical structure. The power system has a pure electric drive working mode and accords with the development trend of the green and energy-saving industry. The power output control device has at least three power output working modes, and the power performance is stronger.

Description

Multimode hydraulic drive power system

Technical Field

The utility model belongs to the hydraulic drive formula engineering machine tool power field, concretely relates to multimode hydraulic drive driving system.

Background

At present, hydraulic drive type engineering machinery source power of mainstream rotary drilling rigs is an engine, and a power output shaft of the engine is directly connected with a hydraulic pump through a coupler to store pressure of a hydraulic system. The driver adjusts the gear of the gear lever to adjust the rotating speed of the engine according to the actual operation condition, the output torque of the engine is dynamically adjusted by the pressure accumulation requirement of the hydraulic pump, the actual working points are distributed in a point-like scattered manner, the optimal control of the working points of the engine cannot be realized, and the peak clipping, valley filling and energy distribution are realized. In addition, the development trend of the green and energy-saving industry needs a more environment-friendly working mode.

SUMMERY OF THE UTILITY MODEL

The utility model provides a multimode hydraulic drive driving system.

The purpose of the utility model is realized with the following mode: a multimode hydraulic drive power system comprises a hydraulic pump for driving the hydraulic system and an engine for driving the hydraulic pump, wherein an output shaft of the engine is connected with the hydraulic pump through a transmission mechanism; the engine drives at least two hydraulic pumps arranged in parallel; the hydraulic pump also comprises at least one driving motor, and each driving motor is connected with at least one hydraulic pump through a transmission mechanism capable of being switched on and off.

At least one driving motor, a power battery and a motor controller are integrated to form a driving motor assembly capable of switching states between a load and a power source; the engine and the driving motor assembly can be connected in an on-off mode and drive the hydraulic pump, and the motor controller controls the driving motor assembly to switch between a load and a power source.

The engine is connected to and drives the individual hydraulic pumps via a clutch or a transfer case.

An output shaft of the engine is connected with a main power output shaft, and the main power output shaft is connected with and drives the main hydraulic pump; a power coupling gear is fixed on the main power output shaft and is meshed with at least two main transition gears; the rotating shaft of at least one main transition gear is connected with a driving motor assembly in a switchable manner through a clutch or a first transfer case; the rotating shaft of at least one main transition gear can be connected with the liquid dividing pressure pump through a transfer power output shaft in a break-make mode.

A second transfer case is arranged on at least one power distribution output shaft, wherein the second transfer case comprises a gear selector, an engine power transmission gear fixedly connected with the main transition gear, a power take-off gear fixedly connected with the power distribution pressure pump through a shaft, and a motor power transmission gear, and the motor power transmission gear is connected with an independent driving motor; the gear selector enables the second transfer gear to be switched among a neutral gear, a first gear and a second gear; when the first gear is selected, the gear selector is connected with the power take-off gear and the engine power transmission gear; when the second gear is in the second gear, the gear selector is connected with the power take-off gear and the motor power transmission gear; and when the engine is in neutral, the power take-off gear is not connected with the motor power transmission gear and the engine power transmission gear.

A motor power transmission gear of the second transfer case is fixedly connected with a concentric transfer case power take-off gear; a motor power output gear is fixed on a motor power output shaft of the independent driving motor and is meshed with the transfer power take-off gear.

And a main clutch is arranged between the engine and the power coupling gear adjacent to the engine.

The main hydraulic pump is communicated with a hydraulic oil tank through a main oil inlet pipe and is communicated with a main hydraulic drive actuating mechanism assembly through a main oil outlet pipe, and the main hydraulic drive actuating mechanism assembly is communicated with the hydraulic oil tank through a main oil return pipe; the liquid dividing pressure pump is communicated with the hydraulic oil tank through a liquid dividing oil pipe and is communicated with the liquid dividing hydraulic driving actuating mechanism assembly through a liquid dividing oil pipe, and the liquid dividing hydraulic driving actuating mechanism assembly is communicated with the hydraulic oil tank through a liquid dividing oil pipe.

The utility model has the advantages that: the hydraulic system has at least two hydraulic pumps, and the power system has stronger adaptability, so that the arrangement of the hydraulic system is separated from the limitation of a physical structure. The power system has a pure electric drive working mode and accords with the development trend of the green and energy-saving industry. The power output control device has at least three power output working modes, and the power performance is stronger. Under the low-load working condition of the hydraulic pump, the engine can not start, and the energy consumption of the whole machine is further reduced. By dynamically adjusting the load force output by the driving motor assembly, the engine can be controlled to work in an optimal economic or emission area.

Drawings

FIG. 1 is a schematic diagram of a power system.

Fig. 2 is a second transfer case schematic.

Wherein, 1 is an engine, 2 is a main clutch, 3 is a main transition gear, 4 is a first transfer gear, 5 is a rotating shaft of a driving motor assembly, 6 is a driving motor assembly, 7 is a transfer power take-off gear, 8 is a main power output shaft, 9 is a main hydraulic pump, 10 is a main oil outlet pipe, 11 is a main hydraulic driving execution assembly, 12 is a main oil return pipe, 13 is a power coupling gear, 14 is a hydraulic oil tank, 15 is a second transfer gear, 16 is a transfer power output shaft, 17 is a motor power output gear, 18 is a motor power output shaft, 19 is a driving motor, 20 is a main oil inlet pipe, 21 is an oil branch pipe, 22 is a liquid separation pressure pump, 23 is an oil outlet pipe, 24 is a liquid separation pressure driving execution assembly, 25 is a gear oil branch pipe, 150 is a selector, 151 is an engine power transmission gear, 152 is a motor power transmission gear, and 153 is a power take-off gear.

Detailed Description

The technical solution of the present invention will be described more fully hereinafter with reference to the accompanying drawings and specific embodiments, it being understood that the preferred embodiments described herein are merely for purposes of illustration and explanation, and are not intended to limit the invention. In the present invention, unless otherwise explicitly specified and limited, technical terms used in the present application shall have the ordinary meaning as understood by those skilled in the art to which the present invention pertains. The terms "connected", "fixed", "arranged" and the like are to be understood in a broad sense, and may be fixedly connected, detachably connected or integrated; can be directly connected or indirectly connected through an intermediate medium; either mechanically or electrically. Unless explicitly defined otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Furthermore, a first feature may be "on" or "over" or "above" a second feature, and the like, may be directly on or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under" or "beneath" a second feature may be directly under or obliquely under the first feature or may simply mean that the first feature is at a lesser level than the second feature. Relational terms such as first, second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

As shown in fig. 1-2, a multi-mode hydraulic drive power system comprises a hydraulic pump for driving the hydraulic system and an engine 1 for driving the hydraulic pump, wherein an output shaft of the engine is connected with the hydraulic pump through a transmission mechanism; the engine 1 drives at least two hydraulic pumps arranged in parallel; the device also comprises at least one driving motor 19, and each driving motor 19 is connected with at least one hydraulic pump through a transmission mechanism capable of being switched on and off. The hydraulic pump is a power element of a hydraulic system and is an element which is driven by an engine or a motor, sucks oil from a hydraulic oil tank, forms pressure oil, discharges the pressure oil and sends the pressure oil to a hydraulic drive executing mechanism. The power system is provided with a plurality of hydraulic pumps, and the arrangement of hydraulic pipelines can be more flexible. The hydraulic pipeline trend and the difficulty of arranging can greatly be reduced through the position of rationally arranging a plurality of hydraulic pumps. The driving motor drives the hydraulic pump by converting electric energy into mechanical energy. The connection between the driving motor and the hydraulic pump can be switched on and off, and the power system can select to drive the hydraulic pump by using the engine alone or drive the hydraulic pump together with the engine and the driving motor 19 according to the actual load.

Furthermore, at least one driving motor 19, a power battery and a motor controller are integrated to form a driving motor assembly 6 which can switch states between a load and a power source; the engine 1 and the driving motor assembly 6 can be connected in an on-off mode and drive the hydraulic pump, and the motor controller controls the driving motor assembly 6 to switch between a load and a power source. The driving motor assembly also comprises a matched power supply system and the like, the performance of the driving motor conforms to the motor national standard GB184881 the driving motor controls the load state or the power state through a motor controller, and the part is the prior mature technology, is mostly applied to new energy vehicles and is not described in detail. In this case, the power system includes at least one drive motor assembly 6. When the load demand power of the hydraulic pump is small, the external characteristic working capacity of the engine is higher than the demand of the hydraulic pump, the actual working point of the engine falls in a low-load region, and the economical efficiency is poor. At this time, the driving motor assembly 6 works as a load, absorbs part of the output torque of the engine and stores the output torque in the form of electric energy. The load of the driving motor assembly is dynamically controlled in real time, and the working point of the engine 1 is adjusted to fall in an economic or emission optimal area. When the load demand power of the hydraulic pump is just enough to make the working point of the engine fall in the optimal area of the economy or the emission of the engine, the engine 1 directly drives the hydraulic pump to work. When the load demand power of the hydraulic pump exceeds the external characteristic working capacity of the engine, the driving motor assembly 6 is used as a power source, and the power generated by the driving motor assembly is coupled with the power of the engine 1 and drives the hydraulic pump. The process may also dynamically optimize the engine operating point to an economic or emissions optimum region by dynamically adjusting the total output torque of the motor drive. The power system effectively avoids the engine from working at a low-load and high-energy-consumption working point, realizes the dynamic optimal control of the working point of the engine, exerts the energy-saving advantage of 'peak clipping and valley filling' of the hybrid power system, and ensures that the engine falls in an optimal economic area or an optimal emission area when working. The working interval with lower oil consumption in the working interval composed of the working points of the engine is the optimal economic area; the low-emission working interval in the working interval composed of the working points of the engine belongs to the optimal emission area. This section belongs to the general expression in the field of engine technology and will not be described in detail.

The engine 1 can be connected to and drive the individual hydraulic pumps via a clutch or a transfer case. The engine 1 and each hydraulic pump can be disconnected through a clutch, and when the output capacity of the driving motor assembly 6 can meet the working power requirement of the hydraulic pump, the driving motor assembly 6 outputs driving force to drive the hydraulic pump to work independently.

Further, an output shaft of the engine 1 is connected with a main power output shaft 8, and the main power output shaft 8 is connected with and drives a main hydraulic pump 9; a power coupling gear 13 is fixed on the main power output shaft 8, and the power coupling gear 13 is meshed with at least two main transition gears 3; the rotating shaft of at least one main transition gear 3 is connected with a driving motor assembly 6 in a switching way through a clutch or a first transfer case 4; the rotating shaft of at least one main transition gear 3 is connected with a pressure dividing pump 22 through a power dividing output shaft 16 in a switching way. A plurality of power coupling gears 13 arranged concentrically may be fixed to the main power output shaft 8. Each main transition gear 3 can be meshed with the same power coupling gear 13 or with different power coupling gears 13. In addition to the main hydraulic pump 9 to which the main power take-off shaft 8 is connected, a partial hydraulic pump 22 is connected to each partial power take-off shaft 16. The main and sub hydraulic pumps 9, 22, the main power output shaft 8 and the sub power output shaft 16 are distinguished by their names and do not represent a master-slave relationship. For convenience of description, it is specified in this paragraph that the transfer case connected to the drive motor assembly 6 is called the first transfer case 4 regardless of the number of the drive motor assemblies 6.

A second transfer gear 15 is arranged on at least one transfer power output shaft 16, wherein the second transfer gear 15 comprises a gear selector 150, an engine power transmission gear 151 fixedly connected with the main transition gear 3, a power take-off gear 153 fixedly connected with the transfer hydraulic pump 22 through a shaft, and a motor power transmission gear 152, wherein the motor power transmission gear 152 is connected with the independent driving motor 19; the gear selector 150 switches the second transfer 15 among the neutral gear, the first gear, and the second gear; in one gear, the gear selector 150 is connected with the power take-off gear 153 and the engine power transmission gear 151; when the second gear is in the second gear, the gear selector 150 is connected with the power take-off gear 153 and the motor power transmission gear 152; in neutral, the power take-off gear 153 is not connected to both the motor power transmission gear 152 and the engine power transmission gear 151. In the first gear, the power of the engine 1 is transmitted to the dividing hydraulic pump 22; in the second gear, the power of the driving motor 19 is transmitted to the sub-hydraulic pump 22. For the sake of clarity and description, the transfer case is referred to as the second transfer case 15, and the transfer case does not have several transfer case power output shafts 16. The drive motor 19 is driven only and does not store electricity. In the scheme, a pure electric drive mode is added to the separating hydraulic pump 22 by adopting the independent driving motor 19 and the second actuator 15. The power battery in the drive motor assembly 6 may charge and power the individual drive motors 19.

The motor power transmission gear 152 of the second transfer case 15 is fixedly connected with the concentric transfer power take-off gear 7; a motor power output gear 17 is fixed on a motor power output shaft 18 of the independent driving motor 19, and the motor power output gear 17 is meshed with the transfer power take-off gear 7. A main clutch 2 is provided between the engine 1 and a power coupling gear 13 adjacent to the engine 1. The main clutch 2 can control the on-off between the engine 1 and all the hydraulic pumps, so that the whole power system can have a pure electric drive mode.

The main hydraulic pump 9 is communicated with a hydraulic oil tank 14 through a main oil inlet pipe 20, is communicated with a main hydraulic drive executing mechanism assembly 11 through a main oil outlet pipe 10, and the main hydraulic drive executing mechanism assembly 11 is communicated with the hydraulic oil tank 14 through a main oil return pipe 12; the dividing hydraulic pump 22 is communicated with the hydraulic oil tank 14 through an oil dividing pipe 21, is communicated with a dividing hydraulic driving actuator assembly 24 through an oil dividing pipe 23, and the dividing hydraulic driving actuator assembly 24 is communicated with the hydraulic oil tank 14 through an oil dividing return pipe 25. The main and branch in the noun are also used for simply distinguishing the names, and do not bring about the relationship of the main and branch.

The present invention will be described in detail by taking the structure shown in fig. 1 as an example, and the structure of fig. 1 includes two hydraulic pumps, a main hydraulic pump 9 and a sub-hydraulic pump 22. The connection and disconnection between the output shaft of the engine 1 and the main power output shaft 8 are realized through the main clutch 2; the main power output shaft 8 drives the main hydraulic pump 9. The main power output shaft 8 is provided with a power coupling gear 13, and the power coupling gear 13 is respectively meshed with the two main transition gears 3. One of the main transition gears 3 is disconnected and connected with a driving motor assembly rotating shaft 5 of a driving motor assembly 6 by a first transfer case 4. The other main transition gear 3 is selected by the second transfer case 15 under the three modes that the sub hydraulic pump 22 is driven by engine power or driven by the driving motor or is not operated. The first transfer case 4 and the second transfer case 15 in fig. 1 are substantially identical in structure, except that: the gear selector of the first transfer gear 4 only has to be changed between neutral and two gear. When in neutral gear, the rotating shaft 5 of the driving motor assembly is disconnected with the corresponding main transition gear 3; and when the second gear is in the second gear, the rotating shaft 5 of the driving motor assembly is fixedly connected with the corresponding main transition gear 3, and the driving motor assembly 6 can be used as a load or power according to requirements. The specific structure of the second actuator 15 is described in detail above. Under low engine load conditions: part of output power of the engine 1 is transmitted to a hydraulic pump for pressure accumulation and is supplied to a hydraulic system of the rotary excavating machine to drive the whole machine to work through a main clutch 2, a first transfer case 4 and a second transfer case 15, and the other part of the output power is transmitted to a driving motor assembly 6 and is stored in a power battery in an electric energy mode, so that the energy can be utilized for the second time. The energy-saving advantages of a hybrid power system and peak clipping and valley filling are fully exerted. When the driving motor assembly 6 is in the power generation operation mode, i.e. as a load, the operating point of the engine can be reversely adjusted by adjusting the torque of the driving motor 19 in the driving motor assembly 6. Under the work of high engine load, the driving motor assembly 6 and the independent driving motor 19 assist the engine 1 to participate in power output together; the rotary excavating machine has stronger power. The driving motor assembly 6 can convert the mechanical energy of the engine into electric energy for driving the independent driving motor 19 to use while dynamically adjusting the working point of the engine, thereby realizing internal recycling of the energy and improving the comprehensive utilization efficiency of the system energy. The operation modes of the structure of fig. 1 are divided by the number of power sources as the items to be distinguished, including but not limited to the following modes. As shown in table 1: the working modes of the multi-mode hydraulic drive power system are listed.

TABLE 1

The utility model discloses have two at least hydraulic pumps, driving system adaptability is stronger, makes hydraulic system arrange the restriction that breaks away from the physical structure. The power system has a pure electric drive working mode and accords with the development trend of the green and energy-saving industry. The power output control device has at least three power output working modes, and the power performance is stronger. Under the low-load working condition of the hydraulic pump, the engine can not start, and the energy consumption of the whole machine is further reduced. By dynamically adjusting the load force output by the driving motor assembly, the engine can be controlled to work in an optimal economic or emission area.

It should be noted that terms used in the description such as "central," "lateral," "longitudinal," "length," "width," "thickness," "height," "front," "rear," "left," "right," "up," "down," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate orientations and positional relationships based on the orientation or positional relationship shown in the drawings, and are used merely for the purpose of slogan to describe the present patent, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation. Therefore, should not be construed as limiting the scope of the invention.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When the technical solutions are contradictory or cannot be combined, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention. Also, it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the spirit of the principles of the invention.

Claims

1. A multi-mode hydraulic drive power system, wherein the power system includes a hydraulic pump driving the hydraulic system and an engine driving the hydraulic pump, characterized by: the output shaft of the engine is connected with the hydraulic pump through a transmission mechanism; the engine drives at least two hydraulic pumps arranged in parallel; the hydraulic pump also comprises at least one driving motor, and each driving motor is connected with at least one hydraulic pump through a transmission mechanism capable of being switched on and off.

2. The multi-mode hydraulic drive power system of claim 1, wherein: at least one driving motor, a power battery and a motor controller are integrated to form a driving motor assembly capable of switching states between a load and a power source; the engine and the driving motor assembly can be connected in an on-off mode and drive the hydraulic pump, and the motor controller controls the driving motor assembly to switch between a load and a power source.

3. The multi-mode hydraulic drive power system of claim 1, wherein: the engine is connected to and drives the individual hydraulic pumps via a clutch or a transfer case.

4. The multi-mode hydraulic drive power system of claim 2, wherein: an output shaft of the engine is connected with a main power output shaft, and the main power output shaft is connected with and drives the main hydraulic pump; a power coupling gear is fixed on the main power output shaft and is meshed with at least two main transition gears; the rotating shaft of at least one main transition gear is connected with a driving motor assembly in a switchable manner through a clutch or a first transfer case; the rotating shaft of at least one main transition gear can be connected with the liquid dividing pressure pump through a transfer power output shaft in a break-make mode.

5. The multi-mode hydraulic drive power system of claim 4, wherein: a second transfer case is arranged on at least one power distribution output shaft, wherein the second transfer case comprises a gear selector, an engine power transmission gear fixedly connected with the main transition gear, a power take-off gear fixedly connected with the power distribution pressure pump through a shaft, and a motor power transmission gear, and the motor power transmission gear is connected with an independent driving motor; the gear selector enables the second transfer gear to be switched among a neutral gear, a first gear and a second gear; when the first gear is selected, the gear selector is connected with the power take-off gear and the engine power transmission gear; when the second gear is in the second gear, the gear selector is connected with the power take-off gear and the motor power transmission gear; and when the engine is in neutral, the power take-off gear is not connected with the motor power transmission gear and the engine power transmission gear.

6. The multi-mode hydraulic drive power system of claim 5, wherein: a motor power transmission gear of the second transfer case is fixedly connected with a concentric transfer case power take-off gear; a motor power output gear is fixed on a motor power output shaft of the independent driving motor and is meshed with the transfer power take-off gear.

7. The multi-mode hydraulic drive power system of claim 5, wherein: and a main clutch is arranged between the engine and the power coupling gear adjacent to the engine.

8. A multi-mode hydraulic drive power system according to any one of claims 4 to 7, wherein: the main hydraulic pump is communicated with a hydraulic oil tank through a main oil inlet pipe and is communicated with a main hydraulic drive actuating mechanism assembly through a main oil outlet pipe, and the main hydraulic drive actuating mechanism assembly is communicated with the hydraulic oil tank through a main oil return pipe; the liquid dividing pressure pump is communicated with the hydraulic oil tank through a liquid dividing oil pipe and is communicated with the liquid dividing hydraulic driving actuating mechanism assembly through a liquid dividing oil pipe, and the liquid dividing hydraulic driving actuating mechanism assembly is communicated with the hydraulic oil tank through a liquid dividing oil pipe.