CN217873519U - Micro-angle stepping control valve set of hydraulic motor - Google Patents
Micro-angle stepping control valve set of hydraulic motor Download PDFInfo
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- CN217873519U CN217873519U CN202222150109.6U CN202222150109U CN217873519U CN 217873519 U CN217873519 U CN 217873519U CN 202222150109 U CN202222150109 U CN 202222150109U CN 217873519 U CN217873519 U CN 217873519U
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Abstract
The utility model relates to a little angle step-by-step control valves of hydraulic motor belongs to the hydraulic drive field. The valve bank is characterized in that a two-position four-way reversing valve, a one-way valve, a pulse oil cylinder and a two-position two-way hydraulic reversing valve are sequentially arranged between a hydraulic pump and a hydraulic motor, and the hydraulic motor is driven to rotate by a tiny angle each time through the cooperative control of the pulse oil cylinder, the manual reversing valve and the hydraulic reversing valve, so that the stepping control of the rotation angle is realized; the hydraulic reversing valve realizes the automatic linkage control from the hydraulic pump to the pulse oil cylinder and from the pulse oil cylinder to the two-section oil way of the hydraulic motor, thereby improving the control and regulation efficiency; and a technical foundation is laid for the automatic and accurate control of the accurate guide drilling and the swing mechanism.
Description
Technical Field
The utility model belongs to the hydraulic drive field, concretely relates to hydraulic motor is little angle step-by-step control valves.
Background
Most of the rotary devices such as a power head of the existing coal mine drilling machine are driven by a hydraulic motor, the adopted hydraulic system has no precise control function, and the rotation angle of the motor is uncontrollable, so that the requirements of accurate guide drilling and automatic control of the coal mine drilling machine are difficult to meet.
In the prior art, the angle measurement or control of rotating parts such as a drilling machine power head, a rotating joint and the like adopts a rotary encoder or a combined proximity switch, the technology must adopt an electric control mode, the related system is complex, and the application range of the technology in the underground coal mine is very limited. Such as 202010125678.8, 201675239.3, 201410097402.8.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a little angle step control valves of hydraulic motor to solve current colliery rig and lack the accurate control function, the uncontrollable problem of motor rotation angle.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a hydraulic motor micro-angle stepping control valve group comprises a two-position four-way reversing valve 2, a one-way valve 3, a pulse oil cylinder 4 and a two-position two-way hydraulic reversing valve 5 which are sequentially arranged between a hydraulic pump 1 and a hydraulic motor 6; the hydraulic pump 1 is connected with an oil inlet of the two-position four-way reversing valve 2, an oil return port of the two-position four-way reversing valve 2 is connected with an oil tank 8, a port B of the two-position four-way reversing valve 2 is communicated with a right cavity of the pulse oil cylinder 4 through the one-way valve 3, a port A of the two-position four-way reversing valve 2 is communicated with a left cavity of the pulse oil cylinder 4, and a right cavity of the pulse oil cylinder 4 is communicated with the hydraulic motor 6 through the two-position two-way hydraulic reversing valve 5; the control oil port of the two-position two-way hydraulic reversing valve 5 is communicated with the port A of the two-position four-way reversing valve 2 through an oil pipe 9.
The control process of the valve group mainly comprises the following steps:
s1, an oil-filled energy storage process:
the valve cores in the two-position four-way reversing valve 2 and the two-position two-way hydraulic reversing valve 5 are both positioned at the right position;
pressure oil output by the hydraulic pump 1 sequentially passes through the two-position four-way reversing valve 2 and the one-way valve 3, is injected into a right cavity of the pulse oil cylinder 4 and fills the right cavity of the pulse oil cylinder 4 with oil, and the oil entering the right cavity pushes a piston of the pulse oil cylinder 4 to move from right to left;
the oil in the left cavity of the pulse oil cylinder 4 is extruded out and returns to the oil tank 8 through the two-position four-way reversing valve 2;
the two-position two-way hydraulic reversing valve 5 at the right position enables an oil path between the pulse oil cylinder 4 and the hydraulic motor 6 to be in a disconnected state, and oil liquid in the right cavity of the pulse oil cylinder 4 cannot enter the hydraulic motor 6, so that the pulse oil cylinder is always in an oil charging and energy storing state.
S2, a pulse rotation process:
a valve core in the two-position four-way reversing valve 2 is switched to a left position, and meanwhile, pressure oil output by the hydraulic pump 1 sequentially passes through the two-position four-way reversing valve 2 and an oil pipe 9 to enter a control oil port of the two-position two-way hydraulic reversing valve 5 so as to switch the two-position two-way hydraulic reversing valve 5 to the left position;
pressure oil output by the hydraulic pump 1 is injected into a left cavity of the pulse oil cylinder 4 through the two-position four-way reversing valve 2 and fills the left cavity of the pulse oil cylinder 4 with oil; the oil entering the left cavity pushes a piston of the pulse oil cylinder 4 to move from left to right;
oil in the right cavity of the pulse oil cylinder 4 is extruded by a piston, the oil way between the pulse oil cylinder 4 and the hydraulic motor 6 is in a connected state by switching to the two-position two-way hydraulic reversing valve 5 at the left position, and the oil in the right cavity of the pulse oil cylinder 4 enters the hydraulic motor 6 through the two-position two-way hydraulic reversing valve 5 so as to push the hydraulic motor 6 to rotate by a tiny angle.
S3, reduction process:
the valve core in the two-position four-way reversing valve 2 is switched to the right position again, pressure oil is input into the right cavity of the pulse oil cylinder 4 through the hydraulic pump 1, and the left cavity of the pulse oil cylinder 4 returns oil and is subjected to pressure relief; and the valve core of the two-position two-way hydraulic reversing valve 5 automatically returns to the right position under the action of the spring, and the whole control system returns to the initial state of the oil charging and energy storage process.
The steps of the oil charging and energy storage process, the pulse rotation process and the reduction process are repeated for a plurality of times, and the hydraulic motor 6 is rotated to a required angle through a plurality of times of accumulation.
Furthermore, an overflow valve 7 is arranged between the hydraulic pump 1 and an oil inlet of the two-position four-way reversing valve 2.
Further, the two-position four-way reversing valve 2 is a manual reversing valve.
The beneficial effects of the utility model reside in that:
the valve bank can realize the cooperative control of the pulse oil cylinder, the manual reversing valve and the hydraulic reversing valve, and the stepping control of the rotating angle is realized by driving the hydraulic motor to rotate by a tiny angle each time; the hydraulic reversing valve realizes the automatic linkage control from the hydraulic pump to the pulse oil cylinder and from the pulse oil cylinder to the two sections of oil paths of the hydraulic motor, and improves the control and regulation efficiency; and a technical foundation is laid for the automatic and accurate control of the accurate guide drilling and the swing mechanism.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic system diagram of a hydraulic motor micro-angle stepping control valve set.
Reference numerals are as follows:
the hydraulic control system comprises a hydraulic pump 1, a two-position four-way reversing valve 2, a one-way valve 3, a pulse oil cylinder 4, a two-position two-way hydraulic reversing valve 5, a hydraulic motor 6, an overflow valve 7, an oil tank 8 and an oil pipe 9.
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "front", "back", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes, and should not be construed as limitations of the present invention, and it will be understood that specific meanings of the above terms can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a hydraulic motor micro-angle step control valve set includes a two-position four-way reversing valve 2, a one-way valve 3, a pulse oil cylinder 4, and a two-position two-way hydraulic reversing valve 5, which are sequentially disposed between a hydraulic pump 1 and a hydraulic motor 6. The hydraulic pump 1 is a power element of the system and provides pressure oil for each element in the system; the hydraulic motor 6 is an actuator of the rotation output. The two-position four-way reversing valve 2 is used for switching the direction of an oil inlet path of the pulse oil cylinder 4; the one-way valve 3 is used for controlling the one-way flow of an oil path between the right cavity of the pulse oil cylinder 4 and the two-position four-way reversing valve 2; the pulse oil cylinder 4 is an element for accumulating and outputting oil and is used for pushing the hydraulic motor 6 to rotate by a tiny angle, and the volume of the pulse oil cylinder 4 is matched with the tiny angle of single rotation of the hydraulic motor 6; the two-position two-way hydraulic reversing valve 5 is used for switching the on-off of an oil path between the pulse oil cylinder 4 and the hydraulic motor 6.
Specifically, a hydraulic pump 1 is connected with an oil inlet P port of a two-position four-way reversing valve 2, an oil return port T port of the two-position four-way reversing valve 2 is connected with an oil tank 8, a port B of the two-position four-way reversing valve 2 is communicated with a right cavity of a pulse oil cylinder 4 through a one-way valve 3, a port A of the two-position four-way reversing valve 2 is communicated with a left cavity of the pulse oil cylinder 4, and a right cavity of the pulse oil cylinder 4 is communicated with a hydraulic motor 6 through a two-position two-way hydraulic reversing valve 5; the control oil port of the two-position two-way hydraulic reversing valve 5 is communicated with the port A of the two-position four-way reversing valve 2 through an oil pipe 9.
The control method of the valve group mainly comprises the following steps:
s1, an oil-filled energy storage process:
initially, the valve cores in the two-position four-way reversing valve 2 and the two-position two-way hydraulic reversing valve 5 are both positioned at the right position; pressure oil output by the hydraulic pump 1 sequentially passes through the two-position four-way reversing valve 2 and the one-way valve 3, then is injected into the right cavity of the pulse oil cylinder 4 and charges oil for the right cavity of the pulse oil cylinder 4, and oil entering the right cavity pushes a piston of the pulse oil cylinder 4 to move from right to left.
Oil in the left cavity of the pulse oil cylinder 4 is extruded by the piston and returns to the oil tank 8 through the two-position four-way reversing valve 2; at this time, the two-position two-way hydraulic reversing valve 5 at the right position enables the oil path between the pulse oil cylinder 4 and the hydraulic motor 6 to be in a disconnected state, and oil liquid in the right cavity of the pulse oil cylinder 4 cannot enter the hydraulic motor 6, so that the pulse oil cylinder 4 is always in an oil charging and energy storage state.
S2, a pulse rotation process:
the valve core in the two-position four-way reversing valve 2 is switched to the left position through operation, and meanwhile, pressure oil output by the hydraulic pump 1 sequentially passes through the two-position four-way reversing valve 2 and the oil pipe 9 to enter a control oil port of the two-position two-way hydraulic reversing valve 5, so that the two-position two-way hydraulic reversing valve 5 is switched to the left position under the action of the oil.
Pressure oil output by the hydraulic pump 1 is injected into a left cavity of the pulse oil cylinder 4 through the two-position four-way reversing valve 2 and fills the left cavity of the pulse oil cylinder 4 with oil; the oil entering the left cavity pushes a piston of the pulse oil cylinder 4 to move from left to right, and the oil in the right cavity of the pulse oil cylinder 4 is extruded by the piston. The two-position two-way hydraulic reversing valve 5 switched to the left position enables an oil path between the pulse oil cylinder 4 and the hydraulic motor 6 to be in a connected state, oil in the right cavity of the pulse oil cylinder 4 enters the hydraulic motor 6 through the two-position two-way hydraulic reversing valve 5, and then the hydraulic motor 6 is pushed to rotate by a small angle, namely stepping type small-angle rotation of the rotation angle is achieved.
S3, reduction process:
the valve core in the two-position four-way reversing valve 2 is switched to the right position again through operation, pressure oil is input into the right cavity of the pulse oil cylinder 4 through the hydraulic pump 1, and the left cavity of the pulse oil cylinder 4 returns oil and is relieved in pressure; at the moment, the valve core of the two-position two-way hydraulic reversing valve 5 automatically returns to the right position under the action of the spring, and the whole control system returns to the initial state of the oil charging and energy storing process again.
The steps of the 'oil charging energy storage process', 'pulse rotation process' and 'reduction process' are repeated for a plurality of times, and the hydraulic motor 6 is rotated to a required angle through a plurality of times of accumulation.
The scheme is also provided with an overflow valve 7, and the overflow valve 7 is used for adjusting the driving force of the hydraulic motor 6; if the system pressure reaches the set value of the overflow valve, redundant oil can return to the oil tank 8 through the overflow valve 7, and thus the pressure safety of the system can be ensured. The overflow valve 7 is arranged between the hydraulic pump 1 and an oil inlet of the two-position four-way reversing valve 2.
The two-position four-way reversing valve 2 in the scheme is a manual reversing valve, and the valve core of the manual reversing valve can be controlled to be automatically switched to the right position under the action of the spring by loosening the operating handle on the manual reversing valve.
The valve group drives the hydraulic motor to rotate by a tiny angle each time through the cooperative control of the pulse oil cylinder, the manual reversing valve and the hydraulic reversing valve, so that the stepping control of the rotating angle is realized; the hydraulic reversing valve realizes the automatic linkage control from the hydraulic pump to the pulse oil cylinder and from the pulse oil cylinder to the two sections of oil paths of the hydraulic motor, and improves the control and regulation efficiency; and a technical foundation is laid for the automatic and accurate control of the accurate guide drilling and the swing mechanism.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (3)
1. The utility model provides a little angle step-by-step valve unit of hydraulic motor which characterized in that: the hydraulic control system comprises a two-position four-way reversing valve (2), a one-way valve (3), a pulse oil cylinder (4) and a two-position two-way hydraulic reversing valve (5) which are sequentially arranged between a hydraulic pump (1) and a hydraulic motor (6); the hydraulic pump (1) is connected with an oil inlet of the two-position four-way reversing valve (2), an oil return port of the two-position four-way reversing valve (2) is connected with an oil tank (8), a port B of the two-position four-way reversing valve (2) is communicated with a right cavity of the pulse oil cylinder (4) through the one-way valve (3), a port A of the two-position four-way reversing valve (2) is communicated with a left cavity of the pulse oil cylinder (4), and a right cavity of the pulse oil cylinder (4) is communicated with the hydraulic motor (6) through the two-position two-way hydraulic reversing valve (5); the control oil port of the two-position two-way hydraulic reversing valve (5) is communicated with the port A of the two-position four-way reversing valve (2) through an oil pipe (9).
2. The hydraulic motor micro-angle step control valve group of claim 1, wherein: an overflow valve (7) is arranged between the hydraulic pump (1) and an oil inlet of the two-position four-way reversing valve (2).
3. The set of hydraulic motor micro-angle step control valves according to claim 1 or 2, characterized in that: the two-position four-way reversing valve (2) is a manual reversing valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222150109.6U CN217873519U (en) | 2022-08-16 | 2022-08-16 | Micro-angle stepping control valve set of hydraulic motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222150109.6U CN217873519U (en) | 2022-08-16 | 2022-08-16 | Micro-angle stepping control valve set of hydraulic motor |
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| CN217873519U true CN217873519U (en) | 2022-11-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024036970A1 (en) * | 2022-08-16 | 2024-02-22 | 中煤科工集团重庆研究院有限公司 | Micro-angle stepping control method for hydraulic motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024036970A1 (en) * | 2022-08-16 | 2024-02-22 | 中煤科工集团重庆研究院有限公司 | Micro-angle stepping control method for hydraulic motor |
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