CN214837450U - Constant-pressure variable pump source control valve group - Google Patents
Constant-pressure variable pump source control valve group Download PDFInfo
- Publication number
- CN214837450U CN214837450U CN202022688028.2U CN202022688028U CN214837450U CN 214837450 U CN214837450 U CN 214837450U CN 202022688028 U CN202022688028 U CN 202022688028U CN 214837450 U CN214837450 U CN 214837450U
- Authority
- CN
- China
- Prior art keywords
- oil
- pressure
- variable pump
- constant
- valve
- 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.)
- Active
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a constant voltage variable pump source valve unit, it includes the integrated package and installs the electromagnetic overflow valve on the integrated package, inside fuel feeding oil duct and the oil return oil duct of being equipped with of integrated package, the pressure oil input port of fuel feeding oil duct is connected with the pressure oil delivery outlet of constant voltage variable pump, and the pressure oil delivery outlet of fuel feeding oil duct and hydraulic system's oil supply pipe are connected, the oil inlet and the fuel feeding oil duct intercommunication of electromagnetic overflow valve, the overflow mouth passes through the oil return oil duct and is connected with hydraulic system's time oil return pipe. The utility model discloses set up the electromagnetic overflow valve in the pressure oil output pipeline of constant voltage variable pump, the high pressure that utilizes the electromagnetic overflow valve to prevent that constant voltage variable pump's variable mechanism or air-vent valve from breaking down the back plunger pump and producing gets into hydraulic system, can effectively protect whole hydraulic system's safety, eliminates the accident potential.
Description
Technical Field
The utility model relates to a valve unit for constant voltage variable pump belongs to hydraulic control technical field.
Background
The constant pressure variable pump is a variable pump with very small pressure change when the flow is adaptively adjusted, and is more and more emphasized by hydraulic system designers due to the advantages of high efficiency, energy conservation and the like. The constant pressure variable pump consists of a plunger pump, a variable oil cylinder and a pressure regulating valve, before the pressure set by the pressure regulating valve on the pump is not reached, a swash plate of the variable pump is at the maximum deflection angle, the pump displacement is maximum and constant, and the constant pressure variable pump is equivalent to a constant displacement pump at the stage in practice. After the set pressure of the pressure regulating valve is reached, the control oil enters the variable oil cylinder, and the variable oil cylinder pushes the swash plate to reduce the displacement of the pump. The existing constant-pressure variable pump has the following defects:
1. when the constant pressure variable pump runs, if a variable mechanism or a pressure regulating valve breaks down, the plunger pump can increase the pressure of the whole hydraulic system to the maximum value, so that the whole hydraulic system is in danger.
2. In a constant-pressure variable pump unit system, pressure oil of a constant-pressure variable pump working on line can recoil to a constant-pressure variable pump not working, so that the constant-pressure variable pump drives a motor to rotate together.
3. Because the oil absorption filter easily causes the cavitation phenomenon of the constant pressure variable pump, the oil absorption filter mode is not generally adopted to treat the hydraulic oil, so that the hydraulic oil output by the constant pressure filter can pollute precision valves such as a servo valve, a proportional valve and the like, and the normal work of the servo valve and the proportional valve is seriously influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a constant voltage variable pump source valve unit to prior art's drawback to hydraulic system's pressure risees unusually when the variable mechanism of preventing constant voltage variable pump or air-vent valve break down, protects whole hydraulic system's safety.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a constant voltage variable pump source control valves, includes the manifold block in the constitution and installs the electromagnetic overflow valve on the manifold block, inside fuel feeding oil duct and the oil return oil duct of being equipped with of manifold block, the pressure oil input port and the pressure oil delivery outlet of constant voltage variable pump of fuel feeding oil duct are connected, and the pressure oil delivery outlet and the hydraulic system's of fuel feeding oil duct supply oil piping connection, the oil inlet and the fuel feeding oil duct intercommunication of electromagnetic overflow valve, the overflow mouth is connected with hydraulic system's oil return piping through the oil return oil duct.
Above-mentioned constant voltage variable pump source valve unit, still be equipped with pressure oil output check valve on the integrated package, pressure oil output check valve installs on the oil supply duct.
Above-mentioned constant voltage variable pump source valve unit, still be equipped with high pressure filter on the integrated package, high pressure filter sets up on the oil supply oil duct.
Above-mentioned constant voltage variable pump source valve unit, still be equipped with the oil return check valve on the integrated package, the oil return check valve is installed on the oil return oil duct.
Above-mentioned constant voltage variable pump source valve unit, still be equipped with on the integrated package with oil pressure gauge assorted miniature pressure measurement joint, miniature pressure measurement joint and oil supply duct intercommunication.
In the constant-voltage variable pump source control valve group, the oil return one-way valve is an inserted valve element.
According to the constant-voltage variable pump source control valve group, the tail end of the oil return channel is provided with the oil return flange.
In the constant-voltage variable pump source control valve group, the pressure oil output port of the oil supply duct is provided with the pressure oil output flange.
The utility model discloses set up the electromagnetic overflow valve in the pressure oil output pipeline of constant voltage variable pump, the high pressure that utilizes the electromagnetic overflow valve to prevent that constant voltage variable pump's variable mechanism or air-vent valve from breaking down the back plunger pump and producing gets into hydraulic system, can effectively protect whole hydraulic system's safety, eliminates the accident potential.
The utility model discloses a check valve and high pressure filter have realized the isolation, the filtration to the pressure oil source, and operating condition's constant-pressure pump is recoil to other pumps in preventing parallelly connected pump package, provides high-quality oil source for hydraulic system.
Furthermore, the utility model discloses still have simple structure, it is multiple functional, advantages such as easy to maintain.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is an external view of the present invention, in which fig. 1 (a) is a front view, fig. 1 (b) is a left view, fig. 1 (c) is a right view, fig. 1 (d) is a top view, and fig. 1 (e) is a rear view;
fig. 2 is a hydraulic schematic diagram of the present invention.
The figures are labeled as follows: 1. the device comprises an integrated block, 2, an electromagnetic overflow valve, 3, a high-pressure filter, 4, an oil return one-way valve, 5, a micro pressure measuring joint, 6, an oil return flange, 7, a pressure oil output flange, 8, a pressure oil output one-way valve, 9, a pressure oil input port, 10, an oil supply channel, 11 and an oil return channel.
Detailed Description
The utility model discloses to prior art's drawback, provide a constant voltage variable pump source valve unit to prevent that the constant pressure pump air-vent valve trouble from causing hydraulic system superhigh pressure to damage the system, avoid the constant pressure pump of operating condition in the parallelly connected pump package to recoil other pumps, and filter hydraulic oil, provide high-quality pressure oil source for hydraulic system.
Referring to fig. 1 and 2, the utility model discloses an integrated package 1, electromagnetism overflow valve 2, high pressure filter 3, oil return check valve 4, miniature pressure measurement connects 5, oil return flange 6, pressure oil output flange 7, pressure oil output check valve 8, pressure oil input port 9, integrated package 1 is the oil circuit control block of constant voltage variable pump source valve unit, install electromagnetism overflow valve 2 directly over integrated package 1, install high pressure filter 3 in the left side of integrated package 1 for pressure oil to the output of constant voltage variable pump filters. An oil return one-way valve 4 is installed on the right side of the integrated block 1, the oil return one-way valve 4 is a plug-in valve element, and the oil return one-way valve 4 prevents oil from flowing backwards in the process that the oil overflowed by the electromagnetic overflow valve 2 flows back to the oil tank. The front surface of the integrated block 1 is further provided with a pressure oil inlet 9, hydraulic oil output by the constant-pressure variable pump enters an oil supply duct 10 of the integrated block 1 (hydraulic oil enters the integrated block 1 from a port P in fig. 2) from the pressure oil inlet 9, an oil return flange 6 (the tail end of the oil return duct 11) is further installed above the integrated block 1, the oil overflowed by the electromagnetic overflow valve 2 flows back to an oil tank (the overflowed oil in fig. 2 flows back to the oil tank from a port T1) through a pipeline connected with the flange, and the back surface of the integrated block 1 is provided with a pressure oil output flange 7 which inputs pressure oil into a hydraulic system through a pipeline connected with the pressure oil output flange 7 (the pressure oil in fig. 2 is input into the hydraulic system from a port P1). A miniature pressure measuring joint 5 is also designed on the back of the manifold block 1 for measuring the pressure of the output pressure oil.
The utility model discloses a working process:
1. preparation of
The adjusting handle of the electromagnetic overflow valve 2 is tightened to the bottom, then the adjusting handle of the pressure regulating valve of the constant-pressure variable pump is loosened to the bottom, the constant-pressure variable pump is started, after 3 seconds, the electromagnet of the electromagnetic overflow valve 2 is electrified, the handle of the pressure regulating valve of the constant-pressure variable pump is tightened to slowly rise the pressure to one hundred twenty percent of the working pressure of the hydraulic system, the adjusting handle of the electromagnetic overflow valve 2 is started to be loosened slowly, when the pressure is adjusted to be reduced from one hundred twenty percent of the working pressure, the electromagnetic overflow valve is stopped being tightened counterclockwise, the pressure is stabilized at one hundred twenty percent of the working pressure, the adjustment is stopped, at the moment, the set pressure of the electromagnetic overflow valve 2 is one hundred twenty percent of the working pressure of the hydraulic system, and then the handle of the pressure regulating valve of the constant-pressure variable pump is adjusted to reduce the pressure of the hydraulic system to the working pressure.
2. Normal operation
The constant-pressure variable pump is started, pressure oil enters the integrated block 1 through the pressure oil input port 9, the electromagnetic overflow valve 2 is unloaded, and the pressure oil flows back to the oil tank through the oil return one-way valve 4 and the hydraulic pipeline connected with the oil return flange 6. After 3 seconds, the electromagnet of the electromagnetic overflow valve 2 is electrified, pressure oil of the constant-pressure variable pump enters the manifold block 1 from the pressure oil inlet 9, is filtered by the high-pressure filter 3 and then enters the hydraulic system through the pressure oil output one-way valve 8 and a hydraulic pipeline connected with the pressure oil output flange 7, and when the constant-pressure variable pump does not work, pressure oil of other pump groups connected in parallel cannot recoil into the pump group due to the isolation effect of the pressure oil output one-way valve 8.
3. The constant-pressure variable pump or the pressure regulating valve is in a fault state
When the constant-pressure variable pump or the pressure regulating valve is in a fault state, the system pressure rises, when the system pressure rises to the set pressure of the electromagnetic overflow valve 2, the electromagnetic overflow valve 2 works to set the system pressure to one hundred twenty percent of the system working pressure, so that the pressure of the hydraulic system cannot rise any more, and the electromagnetic overflow valve 2 plays a role in pressure limiting and pressure stabilizing.
Specification and model of main hydraulic components:
integrated block 1 manufacturing piece
High-pressure filter 3 DF BN/HC500QE10D1.X/L24
Oil return check valve 4M-SR 30-KE05-10B
Miniature pressure measuring joint 5 CSH-M14X1.5/WD
Oil return flange 6H-SFS 300548X 4 stainless steel
Pressure oil output flange 7H-SFS 600442X 5 stainless steel
Pressure oil output one-way valve 8M-SR 30-KE05-10B
The utility model discloses a form of integrated valves has realized the isolation to the pressure oil source, has filtered, has prevented functions such as excessive pressure, provides high-quality oil source for hydraulic system. The utility model discloses simple structure, the function is many, easily troubleshooting and maintenance.
Claims (8)
1. The utility model provides a constant voltage variable pump source valve unit, characterized by includes manifold block (1) and installs electromagnetic overflow valve (2) on manifold block (1) in the constitution, manifold block (1) inside is equipped with fuel feeding oil duct (10) and oil return oil duct (11), the pressure oil input port and the pressure oil delivery outlet of constant voltage variable pump of fuel feeding oil duct (10) are connected, and the pressure oil delivery outlet and the oil feeding pipe connection of hydraulic system of fuel feeding oil duct (10), the oil inlet and the oil feeding oil duct (10) intercommunication of electromagnetic overflow valve (2), the overflow mouth passes through oil return oil duct (11) and hydraulic system's oil return pipe connection.
2. The constant-pressure variable pump source control valve group according to claim 1, wherein the manifold block (1) is further provided with a pressure oil output check valve (8), and the pressure oil output check valve (8) is installed on the oil supply channel (10).
3. The constant pressure variable pump source control valve group according to claim 1 or 2, wherein the manifold block (1) is further provided with a high pressure filter (3), and the high pressure filter (3) is arranged on the oil supply passage (10).
4. The constant-pressure variable pump source control valve group according to claim 3, wherein the manifold block (1) is further provided with an oil return check valve (4), and the oil return check valve (4) is installed on an oil return channel (11).
5. The constant-pressure variable pump source control valve group according to claim 4, characterized in that the manifold block (1) is further provided with a micro pressure measuring joint (5) matched with an oil pressure gauge, and the micro pressure measuring joint (5) is communicated with the oil supply passage (10).
6. The set as claimed in claim 5, wherein the return check valve (4) is a cartridge valve.
7. The constant pressure variable pump source control valve group according to claim 6, wherein the end of the oil return channel (11) is provided with an oil return flange (6).
8. The set as claimed in claim 7, wherein the pressure oil outlet of the oil supply passage (10) is provided with a pressure oil outlet flange (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022688028.2U CN214837450U (en) | 2020-11-19 | 2020-11-19 | Constant-pressure variable pump source control valve group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022688028.2U CN214837450U (en) | 2020-11-19 | 2020-11-19 | Constant-pressure variable pump source control valve group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837450U true CN214837450U (en) | 2021-11-23 |
Family
ID=78757407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022688028.2U Active CN214837450U (en) | 2020-11-19 | 2020-11-19 | Constant-pressure variable pump source control valve group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214837450U (en) |
-
2020
- 2020-11-19 CN CN202022688028.2U patent/CN214837450U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202007802U (en) | Hydraulic system | |
| CN201202622Y (en) | Proportional variable plunger pump | |
| CN103670802A (en) | Small air pillow pressurization system | |
| CN112483269B (en) | Diesel engine safety protection system | |
| CN207568956U (en) | Deflect the hydraulic system of pulse test bench | |
| CN214837450U (en) | Constant-pressure variable pump source control valve group | |
| CN213980968U (en) | Diesel engine safety protection system | |
| CN110953197B (en) | Power control hydraulic system and crane | |
| CN202273877U (en) | Self-circulating check valve | |
| CN205560289U (en) | Medium -low pressure reducing valve set | |
| CN212717420U (en) | EH oil supply device | |
| CN215293098U (en) | Hydraulic system oil circuit cooling structure | |
| CN205804500U (en) | A kind of dedicated bathroom water system | |
| CN210483937U (en) | Oil pressure control device and common rail engine bench experimental system | |
| CN211202067U (en) | Energy-saving turbine EH oil station | |
| CN210003580U (en) | hydraulic power device for aircraft engine maintenance | |
| CN203430911U (en) | Pressure maintaining system for hydraulic machine | |
| CN107461518B (en) | Oil return one-way valve | |
| CN209293918U (en) | A kind of distribution turbine generation energy source station port fuel system | |
| CN201671916U (en) | Hydraulic servo valve protection device and hydraulic servo valve anti-pollution protection circuit | |
| CN215061326U (en) | Gas circuit supercharging device | |
| CN209818411U (en) | Hydraulic variable-pitch system | |
| CN205936902U (en) | Engine fuel pressure regulator | |
| CN218581924U (en) | Pilot control oil way for injection flow valve of die casting machine | |
| CN210118216U (en) | Fuel injection system for vehicle and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |