CN216842418U - Control system for tractor load sensitivity and flow stability - Google Patents
Control system for tractor load sensitivity and flow stability Download PDFInfo
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- CN216842418U CN216842418U CN202123105039.4U CN202123105039U CN216842418U CN 216842418 U CN216842418 U CN 216842418U CN 202123105039 U CN202123105039 U CN 202123105039U CN 216842418 U CN216842418 U CN 216842418U
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Abstract
The utility model discloses a control system of tractor load sensitivity and flow stability, including brake cylinder, two-chamber booster, energy storage ware, relief pressure valve integrated valve piece, pressure sensor, load sensitive pump, lift cylinder, the sensitive automatically controlled lifting multiple unit valve of load, oil absorption filter and oil return filter, the utility model discloses a load pressure feedback is to the load sensitive pump for the output pressure of pump is about 2MPa bigger than load pressure, has practiced thrift power loss to the utmost, has improved efficiency; the load-sensitive pump and the load-sensitive electric-control lifting multi-way valve are matched for use, so that the dual-adaptive requirements of load pressure and flow stability are met, energy is saved to the maximum extent, and energy is saved and emission is reduced; the lifting and descending reach the electric automatic proportional control, the vertical floating of the tilling depth is automatically and reasonably controlled by matching an angle sensor and a force sensor, and the automatic intelligent degree is high; the overall spatial arrangement of the hydraulic system is reasonable, and the maintenance and the repair are convenient.
Description
Technical Field
The utility model relates to a tractor control field of being correlated with specifically is a tractor load is sensitive and flow stability's control system.
Background
The tractor is a self-propelled power machine used for dragging and driving the operation machine to complete various mobile operations, and can also be used as fixed operation power; the system consists of an engine, a transmission system, a walking system, a steering system, a hydraulic suspension system, a power output system, an electric instrument system, a driving control system, a traction system and other systems or devices; the tractor in the prior art has the disadvantages of high power loss due to sensitive load, low efficiency and energy waste to a certain extent.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a control system for tractor load sensing and flow stabilization.
The utility model is realized by constructing a control system with sensitive tractor load and stable flow, the device comprises a brake oil cylinder, a double-cavity booster, an energy accumulator, a pressure reducing valve integrated valve block, a pressure sensor, a load sensitive pump, a lifting oil cylinder, a load sensitive electric control lifting multi-way valve, an oil absorption filter and an oil return filter, the load-sensitive pump absorbs oil from the oil tank, the oil passes through the oil absorption filter to generate high pressure, the high pressure acts on the bottom of the oil cylinder through the load-sensitive electric control lifting multi-way valve to promote the oil cylinder to move, the other way is decompressed through a decompression valve in the decompression valve integrated valve block and then is transmitted to the brake oil cylinder through the double-cavity booster to achieve the braking effect, and an energy accumulator and a pressure sensor are arranged on the pressure reducing valve integrated valve block, one end of the load sensitive electric control lifting multi-way valve is connected with an oil return filter, and the other end of the load sensitive electric control lifting multi-way valve is connected with a lifting oil cylinder.
Preferably, the load-sensitive pump comprises a variable pump, a variable piston, a highest pressure control valve and a load-sensitive valve, one end of the highest pressure control valve and one end of the load-sensitive valve are both connected with the oil absorption filter through the variable pump and the variable piston, and the other ends of the variable pump and the variable piston are connected with the pressure reducing valve integrated valve block.
Preferably, the other end of the highest pressure control valve is connected with the oil cylinder.
Preferably, the other end of the load sensitive valve is connected with a load sensitive electric control lifting multi-way valve.
Preferably, the load-sensitive electrically-controlled lifting multi-way valve comprises an electrically-controlled proportional drop valve, a pressure safety valve, an electrically-controlled proportional lift valve, a pressure compensator, a throttle valve, a first reversing multi-way valve, a second reversing multi-way valve and a shuttle valve, wherein the electrically-controlled proportional drop valve is connected with the pressure safety valve, the electrically-controlled proportional lift valve, a lifting oil cylinder and an oil tank, one end of the electrically-controlled proportional lift valve is connected with the pressure compensator, the pressure compensator is connected with the first reversing multi-way valve through the throttle valve, the other end of the first reversing multi-way valve is connected with the second reversing multi-way valve, and the other end of the second reversing multi-way valve is connected with the shuttle valve.
Preferably, the electric control proportional lift valve and the pressure compensator are both connected with the pressure reducing valve integrated valve block.
Preferably, the pressure safety valve, the first reversing multi-way valve, the second reversing multi-way valve and the shuttle valve are all connected with the oil return filter.
The utility model has the advantages of as follows: the utility model discloses an improve and provide a tractor load sensing and flow stability's control system here, compare with the equipment of the same type, have the following improvement:
the utility model discloses a control system of tractor load sensitivity and flow stability feeds back to the load sensitive pump through load pressure, makes the output pressure of pump about 2MPa bigger than load pressure, has practiced thrift power loss to the utmost extent, has improved efficiency; the load-sensitive pump and the load-sensitive electric-control lifting multi-way valve are matched for use, so that the dual-adaptive requirements of load pressure and flow stability are met, energy is saved to the maximum extent, and energy is saved and emission is reduced; the lifting and descending reach the electric automatic proportional control, the vertical floating of the tilling depth is automatically and reasonably controlled by matching an angle sensor and a force sensor, and the automatic intelligent degree is high; the overall spatial arrangement of the hydraulic system is reasonable, and the maintenance and the repair are convenient.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: the hydraulic brake system comprises a brake oil cylinder-1, a double-cavity booster-2, an energy accumulator-3, a pressure reducing valve integrated valve block-4, a pressure sensor-5, a load sensitive pump-6, a highest pressure control valve-7, a load sensitive valve-8, an electric control proportional drop valve-9, a pressure safety valve-10, an electric control proportional rise valve-11, a lifting oil cylinder-12, a pressure compensator-13, a throttle valve-14, a first reversing multi-way valve-15, a load sensitive electric control lifting multi-way valve-16, a second reversing multi-way valve-17, a shuttle valve-18, an oil absorption filter-19 and an oil return filter-20.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings 1, wherein the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model relates to a control system of tractor load sensitivity and flow stability, which comprises a brake oil cylinder 1, a double-cavity booster 2, an energy accumulator 3, a pressure reducing valve integrated valve block 4 and a pressure sensor 5, the hydraulic brake system comprises a load sensitive pump 6, a lifting oil cylinder 12, a load sensitive electric control lifting multi-way valve 16, an oil absorption filter 19 and an oil return filter 20, wherein the load sensitive pump 6 absorbs oil from an oil tank, the high pressure generated by the oil absorption filter 19 acts on the bottom of the oil cylinder through the load sensitive electric control lifting multi-way valve 16 to promote the oil cylinder to move, the other path of high pressure is decompressed through a decompression valve in a decompression valve integrated valve block 4 and then is transmitted to a brake oil cylinder 1 through a double-cavity booster 2 to achieve the braking effect, an energy accumulator 3 and a pressure sensor 5 are arranged on the decompression valve integrated valve block 4, one end of the load sensitive electric control lifting multi-way valve 16 is connected with the oil return filter 20, and the other end of the load sensitive electric control lifting multi-way valve 16 is connected with the lifting oil cylinder 12.
Furthermore, the load sensitive pump 6 comprises a variable pump and a variable piston, a highest pressure control valve 7 and a load sensitive valve 8, one end of each of the highest pressure control valve 7 and the load sensitive valve 8 is connected with an oil absorption filter 19 through the variable pump and the variable piston, the other end of each of the variable pump and the variable piston is connected with the pressure reducing valve integrated valve block 4, the other end of the highest pressure control valve 7 is connected with the oil cylinder, and the other end of the load sensitive valve 8 is connected with a load sensitive electric control lifting multi-way valve 16.
Further, the load-sensitive electric control lifting multi-way valve 16 comprises an electric control proportional reducing valve 9, a pressure safety valve 10, an electric control proportional increasing valve 11, a pressure compensator 13, a throttle valve 14 and a first reversing multi-way valve 15, the automatic control system comprises a second reversing multi-way valve 17 and a shuttle valve 18, wherein an electric control proportional descending valve 9 is connected with a pressure safety valve 10, an electric control proportional ascending valve 11, a lifting oil cylinder 12 and an oil tank, one end of the electric control proportional ascending valve 11 is connected with a pressure compensator 13, the pressure compensator 13 is connected with a first reversing multi-way valve 15 through a throttle valve 14, the other end of the first reversing multi-way valve 15 is connected with the second reversing multi-way valve 17, the other end of the second reversing multi-way valve 17 is connected with the shuttle valve 18, the electric control proportional ascending valve 11 and the pressure compensator 13 are connected with a pressure reducing valve integrated valve block 4, and the pressure safety valve 10, the first reversing multi-way valve 15, the second reversing multi-way valve 17 and the shuttle valve 18 are connected with an oil return filter 20.
The utility model provides a control system with sensitive tractor load and stable flow through improvement, and the working principle is as follows;
firstly, a load-sensitive pump 6 absorbs oil from an oil tank, the oil passes through an oil absorption filter 19, high pressure is generated and acts on the bottom of an oil cylinder through a load-sensitive electric control lifting multi-way valve 16 to promote the oil cylinder to move, and the other way of oil is decompressed through a decompression valve in a decompression valve integrated valve block 4 and then is transmitted to a brake oil cylinder 1 through a double-cavity booster 2 to achieve a braking effect;
secondly, when the load pressure under the lifting oil cylinder 12 is fed back to the load sensitive valve 8 in the load sensitive pump 6 through a load sensitive loop, the highest load in different loads is switched and fed back through the shuttle valve 18, the pressure generated by the load sensitive valve 8 under the comprehensive action of the variable displacement pump always keeps the pressure difference of 2MPa with the load pressure, and the highest pressure control valve 7 can control the highest pressure of the pump;
thirdly, the pressure compensator 13 in the load-sensitive electrically-controlled lifting multi-way valve 16 enables pressure values at two ends of an oil outlet and an oil inlet of the electrically-controlled proportional lifting valve 11 to be a set constant value, so that the flow is in a stable state under the condition that the opening degree of a valve port of the electrically-controlled proportional lifting valve 11 is not changed, and the reliability is improved;
fourthly, in the hydraulic system, the output pressure of the pump is about 2MPa greater than the load pressure, the power loss is saved to the maximum extent, the efficiency is improved, the dual adaptation of the requirement of the hydraulic load and the requirement of the flow stability is ensured, the electric control proportional lift valve 11 is automatically controlled to lift and descend through an electric control closed loop system, an angle sensor and a force sensor, the uniform tilling depth and the uniform stress are ensured, the operating efficiency is improved, and the maximum utilization of the power is achieved.
The utility model provides a control system with sensitive tractor load and stable flow through improvement, and feeds back to the load sensitive pump 6 through load pressure, so that the output pressure of the pump is about 2MPa greater than the load pressure, the power loss is saved to the utmost extent, and the efficiency is improved; the load-sensitive pump and the load-sensitive electric-control lifting multi-way valve are matched for use, so that the dual-adaptive requirements of load pressure and flow stability are met, energy is saved to the maximum extent, and energy is saved and emission is reduced; the lifting and the descending reach the electric automatic proportional control, the up-and-down floating of the tilling depth is automatically and reasonably controlled by matching an angle sensor and a force sensor, and the degree of automation intelligence is high; the overall spatial arrangement of the hydraulic system is reasonable, and the maintenance and the repair are convenient.
The fundamental principle and the main characteristics of the utility model and the advantages of the utility model have been shown and described above, and the utility model discloses the standard part that uses all can be purchased from the market, and dysmorphism piece is according to the description of specification and the record of attached drawing all can be customized, and the concrete connection mode of each part all adopts conventional means such as ripe bolt rivet among the prior art, welding, and machinery, part and equipment all adopt prior art, and conventional model, including the conventional connected mode among the prior art of circuit connection adoption, do not detailed again here.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A control system of tractor load sensitivity and flow stability which characterized in that: the structure of the hydraulic brake comprises a brake oil cylinder (1), a double-cavity booster (2), an energy accumulator (3), a pressure reducing valve integrated valve block (4), a pressure sensor (5), a load sensitive pump (6), a lifting oil cylinder (12), a load sensitive electric control lifting multi-way valve (16), an oil absorption filter (19) and an oil return filter (20), wherein the load sensitive pump (6) absorbs oil from an oil tank, and generates high pressure to act on the bottom of the oil cylinder through the load sensitive electric control lifting multi-way valve (16) through the oil absorption filter (19) so as to promote the oil cylinder to move, and the other way of pressure is transmitted to the brake oil cylinder (1) through the double-cavity booster (2) after being reduced by a pressure reducing valve in the pressure reducing valve integrated valve block (4) to achieve the braking effect, the energy accumulator (3) and the pressure sensor (5) are arranged on the pressure reducing valve integrated valve block (4), one end of the load sensitive electric control lifting multi-way valve (16) is connected with the oil return filter (20), and the other end of the load-sensitive electric control lifting multi-way valve (16) is connected with the lifting oil cylinder (12).
2. A tractor load sensitive and flow rate stabilizing control system as claimed in claim 1 wherein: the load sensitive pump (6) comprises a variable pump, a variable piston, a highest pressure control valve (7) and a load sensitive valve (8), wherein one ends of the highest pressure control valve (7) and the load sensitive valve (8) are connected with an oil absorption filter (19) through the variable pump and the variable piston, and the other ends of the variable pump and the variable piston are connected with a pressure reducing valve integrated valve block (4).
3. A tractor load sensitive and flow rate stabilizing control system as claimed in claim 2 wherein: the other end of the highest pressure control valve (7) is connected with the oil cylinder.
4. A tractor load sensitive and flow rate stabilizing control system as claimed in claim 2 wherein: the other end of the load sensitive valve (8) is connected with a load sensitive electric control lifting multi-way valve (16).
5. A tractor load sensitive and flow rate stabilizing control system as claimed in claim 1 wherein: the load-sensitive electric control lifting multi-way valve (16) comprises an electric control proportional descending valve (9), a pressure safety valve (10), an electric control proportional ascending valve (11), a pressure compensator (13), a throttle valve (14), a first reversing multi-way valve (15), a second reversing multi-way valve (17) and a shuttle valve (18), wherein the electric control proportional descending valve (9) is connected with the pressure safety valve (10), the electric control proportional ascending valve (11), a lifting oil cylinder (12) and an oil tank, one end of the electric control proportional ascending valve (11) is connected with the pressure compensator (13), the pressure compensator (13) is connected with the first reversing multi-way valve (15) through the throttle valve (14), the other end of the first reversing multi-way valve (15) is connected with the second reversing multi-way valve (17), and the other end of the second reversing multi-way valve (17) is connected with the shuttle valve (18).
6. The tractor load sensing and flow stabilizing control system of claim 5, wherein: and the electric control proportional ascending valve (11) and the pressure compensator (13) are both connected with the pressure reducing valve integrated valve block (4).
7. The tractor load sensing and flow stabilizing control system of claim 5, wherein: the pressure safety valve (10), the first reversing multi-way valve (15), the second reversing multi-way valve (17) and the shuttle valve (18) are all connected with an oil return filter (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123105039.4U CN216842418U (en) | 2021-12-12 | 2021-12-12 | Control system for tractor load sensitivity and flow stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123105039.4U CN216842418U (en) | 2021-12-12 | 2021-12-12 | Control system for tractor load sensitivity and flow stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216842418U true CN216842418U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123105039.4U Active CN216842418U (en) | 2021-12-12 | 2021-12-12 | Control system for tractor load sensitivity and flow stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216842418U (en) |
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2021
- 2021-12-12 CN CN202123105039.4U patent/CN216842418U/en active Active
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