CA2571609A1 - Load sensing hydraulic system - Google Patents
Load sensing hydraulic system Download PDFInfo
- Publication number
- CA2571609A1 CA2571609A1 CA 2571609 CA2571609A CA2571609A1 CA 2571609 A1 CA2571609 A1 CA 2571609A1 CA 2571609 CA2571609 CA 2571609 CA 2571609 A CA2571609 A CA 2571609A CA 2571609 A1 CA2571609 A1 CA 2571609A1
- Authority
- CA
- Canada
- Prior art keywords
- valve
- load sensing
- valve means
- hydraulic system
- flow
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract 23
- 238000006073 displacement reaction Methods 0.000 claims abstract 4
- 238000005086 pumping Methods 0.000 claims abstract 3
- 241001417527 Pempheridae Species 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 230000002441 reversible effect Effects 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
- F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting output members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7058—Rotary output members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A versatile load sensing hydraulic system capable of being adapted to a variety of possible configurations for vehicle mounted implements such as plow/spreader type vehicles or the like is disclosed. An embodiment of the hydraulic system comprises a reservoir means for hydraulic fluid; a load sensitive variable displacement pump means for pumping hydraulic fluid from the reservoir; and a plow on/off valve means having a pressure port coupled to the pump means for receiving hydraulic fluid under pressure. The plow valve means includes a manifold means having a fluid channel coupled to the plow valve means pressure port and further having a number of return ports; one or more on/off valve means coupled to the manifold means return ports, each valve means being adapted to control fluid flow therein to operate a respective component of the plow equipment; and a stroke valve means coupled to a manifold means return port, the stroke valve means being adapted to operate in conjunction with one or more of the on/off valve means for providing a load sensing pressure signal to the pump means.
Claims (30)
1. A hydraulic system for operating hydraulic functions of plow/spreader type equipment comprising:
a) a reservoir means for hydraulic fluid;
b) a load sensitive variable displacement pump means for pumping hydraulic fluid from the reservoir; and c) a plow on/off valve means having a pressure port coupled to the pump means for receiving hydraulic fluid under pressure, the plow valve means including:
i) a manifold means having a fluid channel coupled to the plow valve means pressure port and further having a number of return ports;
ii) one or more on/off valve means coupled to the manifold means return ports, each valve means being adapted to control fluid flow therein to operate a respective component of the plow equipment; and iii) a stroke valve means coupled to a manifold means return port, the stroke valve means being adapted to operate in conjunction with one or more of the on/off valve means for providing a load sensing pressure signal to the pump means.
a) a reservoir means for hydraulic fluid;
b) a load sensitive variable displacement pump means for pumping hydraulic fluid from the reservoir; and c) a plow on/off valve means having a pressure port coupled to the pump means for receiving hydraulic fluid under pressure, the plow valve means including:
i) a manifold means having a fluid channel coupled to the plow valve means pressure port and further having a number of return ports;
ii) one or more on/off valve means coupled to the manifold means return ports, each valve means being adapted to control fluid flow therein to operate a respective component of the plow equipment; and iii) a stroke valve means coupled to a manifold means return port, the stroke valve means being adapted to operate in conjunction with one or more of the on/off valve means for providing a load sensing pressure signal to the pump means.
2. The hydraulic system of claim 1, further comprising:
d) a load sensing spreader valve means having a pressure port coupled to the pump means for receiving hydraulic fluid under pressure, the spreader valve means including:
i) means for controlling fluid flow through the spreader valve for operating the spreader; and ii) port means for providing a load sensing pressure signal; and e) a shuttle valve means for receiving the load sensing pressure signal from the spreader valve means and the load sensing pressure signal from plow on/off valve means, and applying a resultant load sensing pressure signal to the pump means.
d) a load sensing spreader valve means having a pressure port coupled to the pump means for receiving hydraulic fluid under pressure, the spreader valve means including:
i) means for controlling fluid flow through the spreader valve for operating the spreader; and ii) port means for providing a load sensing pressure signal; and e) a shuttle valve means for receiving the load sensing pressure signal from the spreader valve means and the load sensing pressure signal from plow on/off valve means, and applying a resultant load sensing pressure signal to the pump means.
3. The hydraulic system of claim 2, further comprising plow load sensing valve means having a pressure port coupled to the pump means for receiving hydraulic fluid under pressure, the plow load sensing valve means including:
i) one or more load sensing valve means adapted to control fluid flow therein to operate a respective component of the plow equipment; and ii) a port means for providing a load sensing pressure signal from the plow load sensing valve means.
i) one or more load sensing valve means adapted to control fluid flow therein to operate a respective component of the plow equipment; and ii) a port means for providing a load sensing pressure signal from the plow load sensing valve means.
4. The hydraulic system of claim 3, wherein the shuttle valve means includes:
i) a first shuttle valve having inputs coupled to the load sensing spreader valve means and to the plow load sensing valve means to provide an output signal; and ii) a second shuttle valve having inputs coupled to the first shuttle valve and to the plow on/off valve means to provide an output to the load sensing pump.
i) a first shuttle valve having inputs coupled to the load sensing spreader valve means and to the plow load sensing valve means to provide an output signal; and ii) a second shuttle valve having inputs coupled to the first shuttle valve and to the plow on/off valve means to provide an output to the load sensing pump.
5. The hydraulic system of any one of claims 1 to 4, wherein the on/off valve means are closed center valves.
6. The hydraulic system of any one of claims 1 to 5, wherein the on/off valve means are closed center valves including 4 way 3 position valves.
7. The hydraulic system of claim 6, wherein the on/off valve means include 4-way 2 position valves.
8. The hydraulic system of any one of claims 1 to 7, wherein the stroke valve means is a 4 way 2 position valve with one of the work ports plugged.
9. The hydraulic system of any one of claims 2 to 8, wherein load sensing spreader valve means include proportional control valves.
10. The hydraulic system of any one of claims 2 to 9, wherein the load sensing spreader valve means and the plow on/off valve means include return ports coupled to the reservoir means.
11. The hydraulic system of any one of claims 3 to 9, wherein the load sensing spreader valve means, the plow on/off valve means and the plow load sensing valve means include return ports coupled to the reservoir means.
12. The hydraulic system of any one of claims 2 to 11, wherein the load sensing spreader valve means is adapted to operate one or more of the spreader equipment components selected from the group consisting of a conveyor, an auger, a spinner and a liquid dispensing device.
13. The hydraulic system of any one of claims 1 to 12, wherein the plow sensing on/off valve means is adapted to operate one or more of the plow equipment components selected from the group consisting of a front plow lift, a front plow left-right orientation, a detachable harness and a quick hitch lock.
14. The hydraulic system of any one of claims 2 to 12, wherein the plow load sensing valve means is adapted to operate one or more of the plow equipment components selected from the group consisting of a wing front post lift, a wing rear lift, a reversible front plow, a variable pitch front plow, a front plow lift, a banking tower, an under body scraper lift, an under body left-right orientation, a quick hitch lock-unlock, a roll-on-roll-off winch, roll-on-roll-off locking pins, a detachable harness tilt, a dump body hoist and an inside lift for side dump four season bodies.
15. A hydraulic system for controlling hydraulic functions comprising:
a) a reservoir means for hydraulic fluid;
b) a load sensing variable displacement pump means for pumping hydraulic fluid from the reservoir;
c) a unitised valve block having a pressure port coupled to the pump means, the unitised valve block comprising at least one hydraulic function valve means for controlling at least one hydraulic function; and d) a stroke valve means for providing a load sensing pressure signal to the pump means, the stroke valve being operated based on the operation of each function valve means.
a) a reservoir means for hydraulic fluid;
b) a load sensing variable displacement pump means for pumping hydraulic fluid from the reservoir;
c) a unitised valve block having a pressure port coupled to the pump means, the unitised valve block comprising at least one hydraulic function valve means for controlling at least one hydraulic function; and d) a stroke valve means for providing a load sensing pressure signal to the pump means, the stroke valve being operated based on the operation of each function valve means.
16. The hydraulic system of claim 15, wherein the unitized valve block further comprises:
i) an adapter block comprising the stroke valve;
ii) a first valve block comprising at least one first function valve connected to the valve block pressure port for controlling at least one first hydraulic function; and iii) a second valve block comprising at least one second function valve connected to the valve block pressure port for controlling at least one second hydraulic function, wherein the first valve block is connected to a first location of the adapter block, and the second valve block is connected to a second location of the adapter block.
i) an adapter block comprising the stroke valve;
ii) a first valve block comprising at least one first function valve connected to the valve block pressure port for controlling at least one first hydraulic function; and iii) a second valve block comprising at least one second function valve connected to the valve block pressure port for controlling at least one second hydraulic function, wherein the first valve block is connected to a first location of the adapter block, and the second valve block is connected to a second location of the adapter block.
17. The hydraulic system of claim 16, wherein the first valve block is a high-flow valve block comprising a high-flow pressure channel and a high-flow outlet channel, the at least one first function valve is a high-flow function valve, the at least one first hydraulic function is a high-flow hydraulic function, and the first location of the adapter lock is a high-flow location of the adapter block; and wherein the second valve block is a low-flow valve block comprising a low-flow pressure channel and a low-flow outlet channel, the at least one second function valve is a low-flow function valve, the at least one second hydraulic function is a low-flow hydraulic function, and the second location of the adapter block is a low-flow location of the adapter block.
18. The hydraulic system of claim 17, wherein the adapter block further comprises:
i) a pressure channel in fluid communication with:
- an adapter block pressure port;
- an adapter block high-flow pressure port in fluid communication with the high-flow pressure channel of the high-flow valve block;
- an adapter block low-flow pressure port in fluid communication with the low-flow pressure channel; and - the stroke valve;
ii) an outlet channel in fluid communication with:
- an adapter block return port;
- an adapter block high-flow return port in fluid communication with the high-flow outlet channel of the high-flow valve block;
- an adapter block low-flow return port in fluid communication with the low-flow outlet channel of the low-flow valve block; and - the stroke valve; and iii) a load sensing pressure signal channel in fluid communication with:
- an adapter block load sensing pressure signal port; and - the stroke valve.
i) a pressure channel in fluid communication with:
- an adapter block pressure port;
- an adapter block high-flow pressure port in fluid communication with the high-flow pressure channel of the high-flow valve block;
- an adapter block low-flow pressure port in fluid communication with the low-flow pressure channel; and - the stroke valve;
ii) an outlet channel in fluid communication with:
- an adapter block return port;
- an adapter block high-flow return port in fluid communication with the high-flow outlet channel of the high-flow valve block;
- an adapter block low-flow return port in fluid communication with the low-flow outlet channel of the low-flow valve block; and - the stroke valve; and iii) a load sensing pressure signal channel in fluid communication with:
- an adapter block load sensing pressure signal port; and - the stroke valve.
19. The hydraulic system of claim 18, wherein the stroke valve couples the adapter block input channel to the load sensing pressure signal channel based on the operation of each of the high-flow function valves and each of the low-flow function valves, such that each time any of the at least one high-flow function valves or the at least one low-flow function valves is operated the stroke valve is operated.
20. The hydraulic system of claim 15, wherein the hydraulic system further comprises a load sensing valve block comprising:
i) a pressure port coupled to the pump; a load sensing pressure signal port coupled to a shuttle valve first input ; and ii) at least one load sensing function valve for controlling at least one hydraulic function and providing a load sensing pressure signal to the load sensing pressure signal port;
wherein the stroke valve means is coupled to a second input of the shuttle valve, the output of the shuttle valve providing a signal for control of the load sensing variable displacement pump.
i) a pressure port coupled to the pump; a load sensing pressure signal port coupled to a shuttle valve first input ; and ii) at least one load sensing function valve for controlling at least one hydraulic function and providing a load sensing pressure signal to the load sensing pressure signal port;
wherein the stroke valve means is coupled to a second input of the shuttle valve, the output of the shuttle valve providing a signal for control of the load sensing variable displacement pump.
21. The hydraulic system of claim 15, further comprising at least one remote manifold located remotely from the valve block comprising at least one remote function valve for controlling a remote hydraulic function, the stroke valve being further operated based on the operation of each remote function valve.
22. The hydraulic system of claim 17, wherein the high-flow valve block comprises a pressure section having a high-flow pressure port, and wherein the high-flow pressure port is the valve block pressure port.
23. The hydraulic system of claim 20, wherein the load sensing valve block is incorporated into the adapter block.
24. The hydraulic system of claim 15, wherein the function valve means are closed center non-load sensing valves.
25. The hydraulic system of claim 15, wherein the function valve means include 4 way 3 position valves.
26. The hydraulic system of claim 15, wherein the function valve means include 4 way 2 position valves.
27. The hydraulic system of claim 15, wherein the function valve means include 3 way 3 position valves.
28. The hydraulic system of claim 15, wherein the function valve means include 3 way 2 position valves.
29. The hydraulic system of claim 20, wherein at least one load sensing function valve controls a continuously operated hydraulic function.
30. The hydraulic system of claim 29, wherein the continuously operated hydraulic function is selected from a sander/spreader, sweeper, street washing device including a water pump, and vacuum equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2571609A CA2571609C (en) | 2005-12-16 | 2006-12-15 | Load sensing hydraulic system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2,530,727 | 2005-12-16 | ||
| CA002530727A CA2530727A1 (en) | 2005-12-16 | 2005-12-16 | Load sensing hydraulic system for plow/spreader vehicles |
| CA2571609A CA2571609C (en) | 2005-12-16 | 2006-12-15 | Load sensing hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2571609A1 true CA2571609A1 (en) | 2007-06-16 |
| CA2571609C CA2571609C (en) | 2011-12-06 |
Family
ID=38421254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2571609A Active CA2571609C (en) | 2005-12-16 | 2006-12-15 | Load sensing hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2571609C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032415A (en) * | 2012-12-24 | 2013-04-10 | 长沙中联消防机械有限公司 | Hydraulic device and engineering machinery |
-
2006
- 2006-12-15 CA CA2571609A patent/CA2571609C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032415A (en) * | 2012-12-24 | 2013-04-10 | 长沙中联消防机械有限公司 | Hydraulic device and engineering machinery |
| CN103032415B (en) * | 2012-12-24 | 2015-05-20 | 长沙中联消防机械有限公司 | Hydraulic device and engineering machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2571609C (en) | 2011-12-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |