CN202468559U - Variable speed variable pump hydraulic system - Google Patents
Variable speed variable pump hydraulic system Download PDFInfo
- Publication number
- CN202468559U CN202468559U CN2012200859187U CN201220085918U CN202468559U CN 202468559 U CN202468559 U CN 202468559U CN 2012200859187 U CN2012200859187 U CN 2012200859187U CN 201220085918 U CN201220085918 U CN 201220085918U CN 202468559 U CN202468559 U CN 202468559U
- Authority
- CN
- China
- Prior art keywords
- variable
- pump
- hydraulic
- motor
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a hydraulic system, and in particular relates to a variable speed variable pump hydraulic system. The hydraulic system comprises a variable rotating speed motor, a hydraulic pump connected with the variable rotating speed motor, a hydraulic pipeline, an oil tank and an electric control system which controls the variable rotating speed motor, and is characterized in that the hydraulic pump is a variable pump; a pressure relay is connected to the oil outlet of the variable pump; and the output line of the pressure relay is connected with the electric control system of the variable rotating speed motor. The utility model has the characteristics that 1, the characteristic that the variable pump basically does not output flow when reaching the set pressure is utilized, and the flow loss is reduced when an actuating mechanism stops working; and 2, a pressure signal is fed back through the pressure relay, the motor is controlled to switch between high rotating speed and low rotating speed, the pressure relay is used for the high-speed and high-pressure operating state of the actuating mechanism, two energy-saving effects of various speed and variable quantity are superposed, the flow and mechanical loss of the system are reduced, and the problems that service life is shortened, oil is deteriorated and the like because of heating of the pump and the system heating are solved.
Description
Technical field
The utility model relates to a kind of hydraulic system, particularly speed change variable displacement pump hydraulic system.
Background technique
Many fields that need hydraulic system are the machine tool hydraulic field particularly, and its working state generally is: when working in actuator, hydraulic system needs big flow, and this moment, system pressure was lower; When actuator quit work, hydraulic system did not need flow basically and just keeps certain pressure, and time of keeping of pressure is often greatly more than time of output flow.
Satisfying the above-mentioned system that wants at present generally is to adopt hydraulic system with constant displacement pump; The flow of pump output can flow back to fuel tank through relief valve when pressure keeps, and oil pump has been done idle work like this, has both wasted the energy; Also can cause system's heating, shorten the working life of fluid and oil pump.
For overcoming the problems referred to above, some enterprises and R&D institution have also produced some compensator pressure systems based on energy-conservation consideration, and what these compensator pressure systems used basically is speed variable motor and the combination of float amount metering pump.Though the bigger discharge capacity hydraulic system with constant displacement pump of the hydraulic system of float amount metering pump is more energy-conservation, owing to use the metering pump of little discharge capacity, the rotating speed during output flow is high, and the noise that sends is also very big, and the ability advantage is not obvious.
Summary of the invention
The purpose of the utility model is to overcome the defective that existing technology exists; A kind of mechanical loss that reduces flow and system is provided, has solved the speed change variable displacement pump hydraulic system of the rotten problems such as pollution that cause of problem in working life, fluid that the heating of pump and system causes simultaneously.
For realizing the foregoing invention purpose; The technological scheme of the utility model is: a kind of speed change variable displacement pump hydraulic system; The electric control system that comprises speed variable motor, the oil hydraulic pump that links to each other with the speed variable motor, hydraulic pipe line, fuel tank and control speed variable motor; It is characterized in that above-mentioned oil hydraulic pump is a variable displacement pump, on the oil outlet of variable displacement pump, be connected with pressure relay, the electric control system of the output line of pressure relay and speed variable motor links.
Above-mentioned speed variable motor is switched reluctance machines or Frequency Converter Control motor.
On the overflow passage of above-mentioned variable displacement pump, cooler is installed.
The characteristics of the utility model are: the characteristics of output flow not basically when 1, having utilized variable displacement pump itself to have to arrive setting pressure, reduced flow loss in the time of so just can quitting work in actuator; 2, through the pressure relay feedback pressure signal; The control motor switches between high and low rotating speed; The high speed and the high-pressure work state that are used for actuator; So just, not only reduced the flow and the mechanical loss of system, solved the rotten problems such as pollution that cause of problem in working life, fluid that the heating of pump and system causes simultaneously two kinds of energy-saving effect stacks of speed change and variable.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model;
Accompanying drawing 2 is the plan view of the utility model accompanying drawing 1.
Embodiment
Like Fig. 1, shown in 2, oil hydraulic pump 8 is installed on fuel tank 4, drives the speed variable motor 3 of oil hydraulic pump rotation and the level indicator 6 of demonstration fluid position, the flow loss when quitting work for reducing actuator, oil hydraulic pump adopts variable displacement pump.The filler opening of variable displacement pump links to each other with fuel tank through in-line 7, is used to variable displacement pump oil is provided.The oil outlet 10 of variable displacement pump is connected with actuator such as oil hydraulic cylinder through hydraulic pipe line, on the hydraulic pipe line of oil outlet, is connected with pressure relay 11 and pressure gauge 9, on the overflow passage 1 of variable displacement pump, cooler 2 is installed.Pressure relay links with the electric control system 5 of control speed variable motor, is used for the electrical signal of pressure is fed back to electric control system, with control speed variable rotating speed of motor.Above-mentioned speed variable motor can adopt switched reluctance machines or Frequency Converter Control motor.
During use; Variable speed electric motors, particularly drives the variable displacement pump rotation; When system pressure was reduced to the set pressure of pressure relay, when actuator's F.F. just or rewind down, the pressure relay sender was given electric control system; Electric control system control speed variable motor high speed rotating speed is for system provides big flow.Behind the actuator in-position, when hydraulic system pressure raise and to reach set pressure, pressure relay sender, speed variable motor low rotation speed, variable displacement pump also can be when reaching setting pressure, output flow not basically, thus adapt to the different working situation.
Claims (3)
1. speed change variable displacement pump hydraulic system; The electric control system that comprises speed variable motor, the oil hydraulic pump that links to each other with the speed variable motor, hydraulic pipe line, fuel tank and control speed variable motor; It is characterized in that above-mentioned oil hydraulic pump (8) is a variable displacement pump; On the oil outlet of variable displacement pump, be connected with pressure relay (11), the electric control system of the output line of pressure relay and speed variable motor links.
2. speed change variable displacement pump hydraulic system according to claim 1 is characterized in that above-mentioned speed variable motor (3) is switched reluctance machines or Frequency Converter Control motor.
3. speed change variable displacement pump hydraulic system according to claim 1 is characterized in that on the overflow passage of above-mentioned variable displacement pump, being equipped with cooler (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200859187U CN202468559U (en) | 2012-03-09 | 2012-03-09 | Variable speed variable pump hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200859187U CN202468559U (en) | 2012-03-09 | 2012-03-09 | Variable speed variable pump hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202468559U true CN202468559U (en) | 2012-10-03 |
Family
ID=46916718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200859187U Expired - Fee Related CN202468559U (en) | 2012-03-09 | 2012-03-09 | Variable speed variable pump hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202468559U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023532A (en) * | 2015-11-17 | 2017-08-08 | 罗伯特·博世有限公司 | Method and electric hydaulic axle for running electric hydaulic axle |
| CN112727813A (en) * | 2020-11-19 | 2021-04-30 | 宣化钢铁集团有限责任公司 | Parallel operation pump set and use method |
-
2012
- 2012-03-09 CN CN2012200859187U patent/CN202468559U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023532A (en) * | 2015-11-17 | 2017-08-08 | 罗伯特·博世有限公司 | Method and electric hydaulic axle for running electric hydaulic axle |
| CN107023532B (en) * | 2015-11-17 | 2021-04-20 | 罗伯特·博世有限公司 | Method for operating an electrohydraulic shaft and electrohydraulic shaft |
| CN112727813A (en) * | 2020-11-19 | 2021-04-30 | 宣化钢铁集团有限责任公司 | Parallel operation pump set and use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202833365U (en) | Hydraulic source return circuit energy-saving control system | |
| CN103912540A (en) | Hydraulic oil temperature control system and engineering machinery | |
| CN103511403A (en) | Hydraulic cooling system and engineering machine including same | |
| CN102021927A (en) | Rotary oil supply loop for hydraulic excavator | |
| CN102400968B (en) | Hydraulic valve, hydraulic system and concrete pumping equipment | |
| CN202023782U (en) | Rotary hydraulic system of crane and rotary cushion valve of rotary hydraulic system | |
| CN202468559U (en) | Variable speed variable pump hydraulic system | |
| CN102606458A (en) | Hydraulic system for variable-speed variable pump | |
| CN201825568U (en) | Flushing and cooling branch of closed loop of bucket wheel machine hydraulic system | |
| CN102434507A (en) | Engine machinery and load sensitivity control system and control method thereof | |
| CN204921539U (en) | Two -way hydraulic motor's test loop system | |
| CN201746869U (en) | Constant tension control system of hydraulic rotary table | |
| CN107237786B (en) | Hydraulic station remotely conveys oil return buffer unit and application method | |
| CN203257772U (en) | Hydraulic bulldozer power generation device | |
| CN202468560U (en) | High-speed punching hydraulic loop of hydraulic punching machine | |
| CN102003432A (en) | Electro-hydraulic actuator | |
| CN102588393A (en) | High-speed punching hydraulic circuit of hydraulic punching machine | |
| CN102788048A (en) | Engineering mechanical hydraulic oil tank, control method thereof and engineering machine | |
| CN202483996U (en) | Cooling protection device for hydraulic reversing system | |
| CN207059308U (en) | A kind of energy-save oil press oil feeding line | |
| CN203809386U (en) | Dual-wheel milling hydraulic motor oil supplying loop | |
| CN201874923U (en) | Electro-hydraulic actuator | |
| CN203476850U (en) | Flow control device of energy accumulator used for concrete pump truck and concrete pump truck | |
| CN201757100U (en) | Hydraulic motor running-in device | |
| CN202517326U (en) | Lubricating oil dispensing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20210309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |