CN217381388U - Brake circulation system and engineering machinery - Google Patents
Brake circulation system and engineering machinery Download PDFInfo
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- CN217381388U CN217381388U CN202221137930.8U CN202221137930U CN217381388U CN 217381388 U CN217381388 U CN 217381388U CN 202221137930 U CN202221137930 U CN 202221137930U CN 217381388 U CN217381388 U CN 217381388U
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Abstract
The utility model relates to an engineering machine tool technical field discloses a braking circulation system and engineering machine tool. The brake circulating system comprises an energy storage assembly, a circulating control valve, a pedal valve, an oil return source and a back pressure valve, wherein an oil inlet of the circulating control valve is communicated with an oil outlet of the energy storage assembly, a first working oil port of the circulating control valve is communicated with an oil inlet of the brake caliper, a second working oil port of the circulating control valve is communicated with an oil outlet of the brake caliper, and an oil return port of the circulating control valve is communicated with an oil tank; the pedal valve is used for controlling the connection and disconnection of the energy storage assembly and the circulation control valve; an oil return port of the oil return source is communicated with an oil tank and an oil inlet of the brake caliper at the same time, and the backpressure valve is arranged on a communicating pipeline between the oil return port of the oil return source and the oil tank. The utility model provides a braking circulation system when braking, carries out forward single circulation to the system, when not braking, carries out forward continuous circulation to the system, can thoroughly with inside high temperature vaporization brake fluid of pipeline and braking pincers and gas outgoing.
Description
Technical Field
The utility model relates to an engineering machine tool technical field especially relates to a brake cycle system and engineering machine tool.
Background
At present, a pneumatic oil braking system or a full hydraulic braking system is mostly adopted in a braking system of engineering machinery. When a driver steps on a brake pedal, high-pressure brake oil is pressed into the brake in a single direction, and the whole machine finishes braking; when a driver releases a brake pedal, brake fluid returns to the oil tank along the original path, but when the brake is frequently braked, the brake fluid is boiled and vaporized due to high temperature generated by friction of the brake, and the brake fluid reversely emerges from the oil tank, so that the brake effect is seriously influenced.
In order to solve the problems of high-temperature vaporization and oil bleeding of the brake oil, a brake circulating system is additionally arranged in the prior art. Generally divided into a forward single-brake cycle system and a reverse constant-current cycle system. When the forward single-time braking circulation system is released, high-temperature oil can be discharged once, but only the oil with the rebound volume of the brake caliper can be discharged, only part of the brake fluid vaporized at high temperature can be discharged, and the effect is relatively poor. The reverse all-time circulating system has the phenomenon of backflushing because the flow direction of the brake oil is opposite to that of the circulating oil, and when the brake is frequently stepped on, the booster pump presses the high-temperature brake oil in the pipeline into the brake caliper again when the circulating oil does not completely discharge the high-temperature brake oil in the reverse direction, so that the braking effect is reduced. And the system can not exhaust actively, and the brake system needs to be exhausted manually frequently in the braking process.
Therefore, a brake cycle system is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a braking circulation system and engineering machine tool when braking, carries out forward single circulation to the system, when not braking, carries out forward continuous circulation to the system, can thoroughly be with pipeline and the inside high temperature vaporization brake fluid of braking pincers and gas outgoing.
To achieve the purpose, the utility model adopts the following technical proposal:
a brake cycle system comprising:
the energy storage assembly is used for storing energy required by braking;
an oil inlet of the circulation control valve is communicated with an oil outlet of the energy storage assembly, a first working oil port of the circulation control valve is communicated with an oil inlet of the brake caliper, a second working oil port of the circulation control valve is communicated with an oil outlet of the brake caliper, and an oil return port of the circulation control valve is communicated with an oil tank;
the pedal valve is used for controlling the connection and disconnection of the energy storage assembly and the circulation control valve;
the back pressure valve is arranged on a communicating pipeline between the oil return port of the return oil source and the oil tank.
Preferably, the back pressure valve is opened at a pressure lower than a minimum brake pressure of the caliper.
As a preferable technical solution of the brake cycle system, a communication pipe between an oil return port of the return oil source and an oil inlet of the brake caliper is provided with a check valve, and the check valve is configured to be communicated in one direction from the return oil source to the brake caliper.
As the optimal technical scheme of the braking circulating system, the return oil source is a multi-way valve in a main working hydraulic system or a hydraulic pump.
As a preferable technical scheme of the brake circulating system, the circulating control valve is of an internal control type.
As a preferred technical scheme of the brake circulating system, the energy storage assembly comprises a pump, a liquid charging valve and an energy accumulator, the pedal valve is a hydraulic pedal valve, an oil inlet of the pump is communicated with the oil tank, an oil outlet of the pump is communicated with an oil inlet of the liquid charging valve, an oil outlet of the liquid charging valve is communicated with the energy accumulator, the energy accumulator is communicated with an oil inlet of the hydraulic pedal valve, and an oil outlet of the hydraulic pedal valve is communicated with an oil inlet of the circulating control valve.
As the preferable technical scheme of the brake circulating system, a filter is arranged on a communication pipeline between an oil outlet of the pump and an oil inlet of the liquid filling valve.
As a preferred technical scheme of the brake circulating system, the energy storage assembly comprises an air compressor, an air storage tank and a booster pump, the pedal valve is a pneumatic pedal valve, an air outlet of the air compressor is communicated with the air storage tank, the air storage tank is communicated with an air inlet of the pneumatic pedal valve, an air outlet of the pneumatic pedal valve is communicated with an air inlet of the booster pump, and an oil outlet of the booster pump is communicated with an oil inlet of the circulating control valve.
As the optimal technical scheme of the braking circulating system, an oil-water separator is arranged on a communication pipeline between an air outlet of the air compressor and the air storage tank.
A working machine comprising a brake cycle system according to any one of the above aspects.
The utility model has the advantages that:
the utility model provides a brake circulation system, when the brake is released, after the pedal valve is loosened, the oil in the oil cavity of the brake caliper can return to the oil tank through the oil outlet of the brake caliper and the oil return working stream of the circulation control valve, so as to realize the one-way discharge of the high-temperature vaporized brake oil in the brake caliper; when the braking is not performed, return oil still flows back to the oil tank, and oil flowing out of an oil return opening of the return oil source passes through the backpressure valve before flowing into the oil return tank, so that the return oil has a backpressure value, part of the oil flowing out of the oil return opening of the return oil source flows to an oil inlet of the brake caliper, the oil in an oil cavity of the brake caliper continuously flows to the oil return tank through an oil outlet of the brake caliper and an oil return working fluid of the circulation control valve, and therefore a forward circulation oil path which is consistent with the one-way discharge direction when the braking is released and uninterrupted is formed. The direction of the oil liquid in the brake caliper is always kept from the oil inlet to the oil outlet in the circulation process, so that the high-pressure brake liquid pressed into the brake caliper is the new non-high-temperature vaporized oil liquid during each braking, and the high-temperature vaporized brake liquid and gas in the pipeline and the brake caliper can be discharged. The continuous and uninterrupted oil from the oil return source can continuously and circularly discharge high-temperature vaporized brake fluid which is not completely discharged in a single circulation mode when the pedal valve is released, and meanwhile, the continuous circulating oil can play a role in cooling the brake caliper in circulating oil.
Drawings
Fig. 1 is a schematic view of a brake cycle system according to an embodiment of the present invention;
fig. 2 is a schematic view of a brake cycle system according to a second embodiment of the present invention.
In the figure:
1. an oil tank; 2. a pump; 3. a filter; 4. a liquid charging valve; 5. an accumulator; 6. a hydraulic pedal valve; 7. a circulation control valve; 8. a brake caliper; 9. an oil return source; 10. a back pressure valve; 11. a one-way valve;
2', an air compressor; 4', a booster pump; 5', an air storage tank; 6' pneumatic pedal valve.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
As shown in fig. 1, the present invention provides a braking cycle system, which includes an energy storage component, a cycle control valve 7, a pedal valve, an oil return source 9 and a back pressure valve 10, wherein the energy storage component is used for storing energy required by braking; an oil inlet of the circulation control valve 7 is communicated with an oil outlet of the energy storage assembly, a first working oil port of the circulation control valve 7 is communicated with an oil inlet of the brake caliper 8, a second working oil port of the circulation control valve 7 is communicated with an oil outlet of the brake caliper 8, and an oil return port of the circulation control valve 7 is communicated with the oil tank 1; the pedal valve is used for controlling the connection and disconnection of the energy storage assembly and the circulation control valve 7; an oil return port of the return oil source 9 is communicated with the oil tank 1 and an oil inlet of the brake caliper 8 at the same time, and the backpressure valve 10 is arranged on a communication pipeline between the oil return port of the return oil source 9 and the oil tank 1.
When braking is needed, the pedal valve is stepped, oil in the energy storage assembly is input to an oil inlet of the brake caliper 8 through an oil inlet working position of the circulation control valve 7, at the moment, an oil outlet of the brake caliper 8 is closed, so that high pressure can be established in the oil inlet of the brake caliper 8, and braking is achieved; when the brake is released, the pedal valve is released, the energy storage assembly is disconnected with the circulation control valve 7, the circulation control valve 7 is switched to an oil return working position, oil in the oil cavity of the brake caliper 8 flows back to the oil tank 1 through the oil outlet of the brake caliper 8 and the oil return working position of the circulation control valve 7, and the one-way discharge of high-temperature vaporized brake oil in the brake caliper 8 is realized; when the braking is not performed, the return oil of the return oil source 9 still flows back to the oil tank 1, and because the oil flowing out from the oil return port of the return oil source 9 passes through the backpressure valve 10 before flowing into the oil return tank 1, the return oil has a backpressure value, and at the moment, part of the oil flowing out from the oil return port of the return oil source 9 flows to the oil inlet of the brake caliper 8, so that the oil in the oil cavity of the brake caliper 8 continuously flows back to the oil tank 1 through the oil outlet of the brake caliper 8 and the return working fluid of the circulation control valve 7, and a forward circulation oil path which is consistent with the one-way discharge direction and uninterrupted when the braking is released is formed.
Because the direction of oil liquid in the brake caliper 8 is always kept from the oil inlet to the oil outlet in the circulation process, the high-pressure brake liquid pressed into the brake caliper 8 is ensured to be new non-high-temperature vaporized oil liquid during each braking, and the high-temperature vaporized brake liquid and gas in the pipeline and the brake caliper 8 can be discharged. The continuous and uninterrupted oil from the oil return source 9 can continuously and circularly discharge high-temperature vaporized brake fluid which is not completely discharged in a single circulation when the pedal valve is released, and meanwhile, the continuous circulating oil can play a role in cooling the brake caliper 8 by circulating oil.
Further, the opening pressure of the backpressure valve 10 is smaller than the minimum brake pressure of the brake caliper 8. By making the opening pressure of back pressure valve 10 smaller than the minimum brake pressure of brake caliper 8, it is possible to avoid causing continuous brake wear of brake caliper 8 to protect brake caliper 8.
A one-way valve 11 is arranged on a communication pipeline between an oil return port of the return oil source 9 and an oil inlet of the brake caliper 8, and the one-way valve 11 is configured to be communicated in a one-way mode along the direction from the return oil source 9 to the brake caliper 8. Through setting up check valve 11, can avoid the backward flow of fluid through the oil inlet of braking pincers 8 in the oil chamber of braking pincers 8.
Preferably, the circulation control valve 7 is of an internal control type, that is, an oil outlet of the energy storage assembly is communicated with an oil inlet of the circulation control valve 7 and is also communicated with a control end of the circulation control valve 7, when oil of the energy storage assembly is input to the oil inlet of the circulation control valve 7, the oil of the energy storage assembly can flow to the control end of the circulation control valve 7, a valve core of the circulation control valve 7 is pushed to an oil inlet working position, and therefore the oil input to the oil inlet of the circulation control valve 7 can flow to the brake caliper 8 through the oil inlet working position. Of course, the circulation control valve 7 is not limited to the internal control type, and may be an external control type, an electromagnetic control type, or an air control type. Optionally, the circulation control valve 7 is a two-position four-way reversing valve.
Preferably, the return oil source 9 is a multi-way valve in a main working hydraulic system, the main working hydraulic system is used for realizing various actions performed by an executing part (such as a bucket of a loader) of the engineering machine, the multi-way valve is an important component in the main working hydraulic system, and the main working hydraulic system and the multi-way valve are all in the prior art and are not described in detail herein. By adopting the multi-way valve as the oil return oil source 9, the external connection of other oil sources can be avoided, the structure can be simplified, and the cost is reduced. Of course, the return oil source 9 is not limited to the multi-way valve, and any external oil source may be used instead, for example, a small displacement hydraulic pump.
In this embodiment, the energy storage assembly includes a pilot pump 2, a liquid charging valve 4 and an energy accumulator 5, where the pedal valve is a hydraulic pedal valve 6, an oil inlet of the pilot pump 2 is communicated with the oil tank 1, an oil outlet of the pilot pump 2 is communicated with an oil inlet of the liquid charging valve 4, an oil outlet of the liquid charging valve 4 is communicated with the energy accumulator 5, the energy accumulator 5 is communicated with an oil inlet of the hydraulic pedal valve 6, and an oil outlet of the hydraulic pedal valve 6 is communicated with an oil inlet of the circulation control valve 7. The pilot pump 2 is capable of drawing oil from the oil tank 1 and feeding the oil to the charge valve 4, and the charge valve 4 is capable of charging the accumulator 5. In this case, the brake cycle system is a full hydraulic brake cycle system. Preferably, be provided with filter 3 on the communicating line between the oil-out of pilot pump 2 and the oil inlet of prefill valve 4 to filter fluid, avoid impurity entering system, cause wearing and tearing to the system inner part.
Example two
The present embodiment provides a braking circulation system, which has a structure that is mostly the same as that of the first embodiment, and for the sake of simplicity, only the differences between the first embodiment and the second embodiment will be described. As shown in fig. 2, in this embodiment, the energy storage assembly includes an air compressor 2 ', an air storage tank 5' and a force application pump 4 ', where the pedal valve is a pneumatic pedal valve 6', an air outlet of the air compressor 2 'is communicated with the air storage tank 5', the air storage tank 5 'is communicated with an air inlet of the pneumatic pedal valve 6', an air outlet of the pneumatic pedal valve 6 'is communicated with an air inlet of the force application pump 4', an oil outlet of the force application pump 4 'is communicated with an oil inlet of the circulation control valve 7, the air compressor 2' can compress air into high-pressure gas, the high-pressure gas can be stored in the air storage tank 5 ', when braking is required, the pneumatic pedal valve 6' is pressed down, the high-pressure gas in the air storage tank 5 'is sent to the force application pump 4' through the pneumatic pedal valve 6 ', the force application pump 4' converts the high-pressure gas into high-pressure oil, and the high-pressure oil flows to the circulation control valve 7, and the braking circulation system is preferably a pneumatic oil-type braking circulation system, an oil-water separator (not shown in the figure) is arranged on a communicating pipeline between the air outlet of the air compressor 2 ' and the air storage tank 5 ', and the oil-water separator can remove impurities from high-pressure gas before entering the air storage tank 5 '.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A brake cycle system, comprising:
the energy storage assembly is used for storing energy required by braking;
an oil inlet of the circulation control valve (7) is communicated with an oil outlet of the energy storage assembly, a first working oil port of the circulation control valve is communicated with an oil inlet of the brake caliper (8), a second working oil port of the circulation control valve is communicated with an oil outlet of the brake caliper (8), and an oil return port of the circulation control valve is communicated with the oil tank (1);
the pedal valve is used for controlling the connection and disconnection of the energy storage assembly and the circulation control valve (7);
the brake caliper comprises an oil return source (9) and a back pressure valve (10), wherein an oil return port of the oil return source (9) is communicated with an oil inlet of the oil tank (1) and an oil inlet of the brake caliper (8) at the same time, and the back pressure valve (10) is arranged on a communication pipeline between the oil return port of the oil return source (9) and the oil tank (1).
2. Brake cycle system according to claim 1, characterized in that the opening pressure of the back pressure valve (10) is less than the minimum brake pressure of the brake caliper (8).
3. The brake cycle system according to claim 1, characterized in that a communication line between an oil return port of the return oil source (9) and an oil inlet of the brake caliper (8) is provided with a one-way valve (11), and the one-way valve (11) is configured to conduct in one direction from the return oil source (9) to the brake caliper (8).
4. A brake cycle system according to claim 1, characterized in that the return oil source (9) is a multi-way valve in the main working hydraulic system or a hydraulic pump.
5. A brake cycle system according to claim 1, wherein the cycle control valve (7) is of the internal control type.
6. The brake cycle system of any one of claims 1 to 5, wherein the energy storage assembly comprises a pump (2), a liquid charging valve (4) and an energy accumulator (5), the pedal valve is a hydraulic pedal valve (6), an oil inlet of the pump (2) is communicated with the oil tank (1), an oil outlet of the pump (2) is communicated with an oil inlet of the liquid charging valve (4), an oil outlet of the liquid charging valve (4) is communicated with the energy accumulator (5), the energy accumulator (5) is communicated with an oil inlet of the hydraulic pedal valve (6), and an oil outlet of the hydraulic pedal valve (6) is communicated with an oil inlet of the cycle control valve (7).
7. The brake cycle system of claim 6, wherein a filter (3) is arranged on a communication line between the oil outlet of the pump (2) and the oil inlet of the charge valve (4).
8. The brake cycle system of any one of claims 1 to 5, wherein the energy storage assembly comprises an air compressor (2 '), an air storage tank (5 ') and a force pump (4 '), the pedal valve is a pneumatic pedal valve (6 '), an air outlet of the air compressor (2 ') is communicated with the air storage tank (5 '), the air storage tank (5 ') is communicated with an air inlet of the pneumatic pedal valve (6 '), an air outlet of the pneumatic pedal valve (6 ') is communicated with an air inlet of the force pump (4 '), and an oil outlet of the force pump (4 ') is communicated with an oil inlet of the cycle control valve (7).
9. The brake cycle system according to claim 8, wherein an oil-water separator is provided on a communication line between the air outlet of the air compressor (2 ') and the air reservoir (5').
10. A working machine, characterized in that it comprises a brake cycle system according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221137930.8U CN217381388U (en) | 2022-05-12 | 2022-05-12 | Brake circulation system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221137930.8U CN217381388U (en) | 2022-05-12 | 2022-05-12 | Brake circulation system and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217381388U true CN217381388U (en) | 2022-09-06 |
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ID=83085132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221137930.8U Active CN217381388U (en) | 2022-05-12 | 2022-05-12 | Brake circulation system and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217381388U (en) |
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2022
- 2022-05-12 CN CN202221137930.8U patent/CN217381388U/en active Active
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