Hydraulic control system for cutting cylinder of mining machine
Through the design of the hydraulic control system, stepless speed regulation and automatic working condition adaptation of the cutting cylinder of the mining machine were realized, which solved the problems of narrow speed regulation range and weak adaptability, improved production efficiency and equipment reliability, and reduced energy consumption and maintenance costs.
Patent Information
- Application Number
- CN202423117718.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Existing mining machine cutting drums have narrow speed ranges and poor adaptability. Traditional mechanical transmission structures are complex, expensive, have narrow speed ranges, and cause large shocks when shifting gears. The engine cannot always operate in the high-efficiency range.
The hydraulic control system consists of a variable displacement pump and various hydraulic valves, including a left-side motor, a right-side motor, a variable displacement pump, various hydraulically controlled directional valves and control valves. It achieves stepless speed regulation by switching motor operating modes and automatically adjusts the operating mode to adapt to different working conditions.
It achieves stepless speed regulation, improves production efficiency, enhances adaptability, reduces energy consumption and maintenance costs, improves safety, and reduces noise.
Smart Images
Figure CN223563142U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of hydraulic control system, concretely is a kind of mining machine cutting cylinder hydraulic control system. BACKGROUND
[0002] Mining machine relies on cutting cylinder rotation to exploit mineral rock, and the demand for power and torque is very large.According to the different geological conditions, when exploiting low-hardness mineral rock, the drum needs to be rotated at high speed to improve the exploitation efficiency.When exploiting high-hardness mineral rock, the drum torque needs to be increased to improve the rock breaking capacity, but it is subject to engine power, at this time, the drum needs to reduce the speed.The traditional mechanical transmission can only rely on engine and multi-gear variable speed gear box, and the structure is complex, the price is expensive, the speed regulating range is narrow, the impact is large when gear box shifts, and the engine cannot work in the high efficiency range all the time.Therefore, it is necessary to develop a set of low-cost, compact, wide-speed-regulating-range, strong-working-condition-adaptability hydraulic control system driven by quantitative hydraulic motor for cutting cylinder. SUMMARY
[0003] The utility model aims at providing a kind of mining machine cutting cylinder hydraulic control system to solve the problem that the speed regulating range of existing cutting cylinder is narrow and the adaptability is not strong.
[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of mining machine cutting cylinder hydraulic control system, including variable displacement pump, the variable displacement pump is connected with first pipeline and second pipeline, left motor and three-way selector valve are arranged between the first pipeline and the second pipeline, the first pipeline end is connected with first control valve, the second pipeline end is connected with second control valve, the three-way selector valve other end is provided with reversing valve, the reversing valve is connected with sequence control valve, the direction of reversing valve is selected by sequence control valve, the control end of first control valve and second control valve is connected with the mouth of reversing valve, the other mouth of reversing valve is connected with third control valve, the first control valve and second control valve one end are provided with closed pipeline, the third control valve is connected in parallel on closed pipeline, right motor is provided on the closed pipeline.
[0005] As a further improvement of the above technical solution:
[0006] The reversing valve is two-position four-way hydraulic control reversing valve, and the sequence control valve is sequence valve, and the reversing is realized by controlling two-position four-way hydraulic control reversing valve through sequence valve.
[0007] The reversing valve is two-position four-way electromagnetic reversing valve, and the sequence control valve is pressure switch, and the reversing is realized by controlling two-position four-way electromagnetic reversing valve through pressure switch.
[0008] The three-way selector valve is shuttle valve.
[0009] The first control valve, the second control valve and the third control valve are two-way cartridge valves.
[0010] Compared with the prior art, the mining machine cutting drum hydraulic control system has the advantages that:
[0011] The stepless speed regulation interval is expanded: by switching the left motor to work alone and the left motor and the right motor to work simultaneously, stepless speed regulation of the cutting drum is realized, thereby expanding the speed regulation interval and meeting the requirements in different working conditions.
[0012] The production efficiency is improved: the system can automatically switch the working mode according to the load size, realize automatic conversion of high speed and low torque and low speed and high torque, and effectively improve the production efficiency.
[0013] The adaptability is stronger: the system can automatically adjust the working mode according to the actual working condition, adapt to various complex working environments, and improve the reliability of the equipment.
[0014] Energy saving and consumption reduction: by reasonably distributing the energy of the hydraulic system, energy waste is avoided, and the equipment operation cost is reduced.
[0015] Simple structure and convenient operation: two-way cartridge valves, shuttle valves and other elements are used to simplify the system structure and facilitate maintenance and operation. Compared with gear transmission and chain transmission, the structure is compact and simple, and the cutting drum forward and reverse rotation requirement is more easily realized.
[0016] Safety is improved: the system has an automatic protection function, and when the load is too large, it can automatically switch to the double-motor working mode to prevent the equipment from being damaged due to excessive load.
[0017] Noise reduction: by optimizing the design of the hydraulic system, the noise during equipment operation is reduced, and the working environment is improved.
[0018] Maintenance cost is reduced: due to the simple structure of the system, the failure rate is reduced, thereby reducing the maintenance cost.
[0019] In summary, the mining machine cutting drum hydraulic control system has obvious advantages in improving production efficiency, reducing energy consumption, enhancing adaptability and the like, and provides strong technical support for the mining industry. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a whole structure schematic view of the mining machine cutting drum hydraulic control system of the utility model;
[0021] Figure 2 It is a single-motor low-torque high-speed forward rotation hydraulic oil flow direction schematic view of the utility model;
[0022] Figure 3 It is a single-motor low-torque high-speed reverse rotation hydraulic oil flow direction schematic view of the utility model;
[0023] Figure 4 It is the double motor high torque low speed forward rotation hydraulic oil flow direction schematic view of the utility model.
[0024] Figure 5 It is the double motor high torque low speed reverse rotation hydraulic oil flow direction schematic view of the utility model.
[0025] Reference signs: 10, variable oil pump;20, left motor;30, three-way selector valve;40, reversing valve;50, sequence control valve;60, first control valve;70, second control valve;80, third control valve;90, right motor. DETAILED DESCRIPTION
[0026] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model will be further described in combination with specific embodiments.
[0027] In the description of the utility model, it should be pointed out that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the utility model, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0029] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.
[0030] As Figure 1As shown, the mining machine cutting drum hydraulic control system of the embodiment includes a variable oil pump 10, the variable oil pump 10 is connected with a first pipeline and a second pipeline, a left motor 20 and a three-way selection valve 30 are arranged between the first pipeline and the second pipeline, the variable oil pump 10 is driven by an engine, and the left motor 20 is driven to rotate by oil movement in the pipeline.
[0031] A first control valve 60 is connected at the end of the first pipeline, a second control valve 70 is connected at the end of the second pipeline, a reversing valve 40 is arranged at the other end of the three-way selection valve 30, the reversing valve 40 is connected with a sequence control valve 50, the direction of the reversing valve 40 is selected through the sequence control valve 50, one port at the upper part of the reversing valve 40 is connected with the control end of the first control valve 60 and the second control valve 70, another port at the upper part of the reversing valve 40 is connected with a third control valve 80, one port at the lower part of the reversing valve 40 is connected with the three-way selection valve 30, and another port at the lower part is connected with an oil tank, the first control valve 60 and the second control valve 70 are provided with a closed pipeline at one end, the third control valve 80 is connected in parallel on the closed pipeline, and a right motor 90 is arranged on the closed pipeline. The three-way selection valve 30 is a shuttle valve, and the opening channel is selected through the oil pressure route.
[0032] The first control valve 60, the second control valve 70 and the third control valve 80 are two-way cartridge valves, the two-way cartridge valve includes a control end (serial number 3), a first oil port (serial number 1) and a second oil port (serial number 2), when the control end (serial number 3) has oil pressure, the first oil port (serial number 1) and the second oil port (serial number 2) are not connected, and when the control end (serial number 3) has no oil pressure, the first oil port (serial number 1) and the second oil port (serial number 2) are connected.
[0033] In an embodiment of the application, the reversing valve 40 is a two-position four-way hydraulic control reversing valve, and the sequence control valve 50 is a sequence valve, and the reversing is realized by controlling the two-position four-way hydraulic control reversing valve through the sequence valve.
[0034] In another embodiment of the application, the reversing valve 40 is a two-position four-way electromagnetic reversing valve, and the sequence control valve 50 is a pressure switch, and the reversing is realized by controlling the two-position four-way electromagnetic reversing valve through the pressure switch.
[0035] As Figure 2As shown, in use, due to the low load pressure is not enough to open the sequence control valve 50, at this time only need to work left motor, right motor follow-up. Its hydraulic working principle: variable oil pump 10 A port output pressure oil, through the three-way selector valve 30 1-2, reversing valve 40 to the first control valve 60 and the second control valve 70 control end (serial number 3), at this time the first control valve 60 and the second control valve 70 closed, that is, not through, so the pressure oil through the left side of the motor 20 A1, B1 back to the variable oil pump 10 B port, drive the left side of the motor positive rotation. At the same time the third control valve 80 control end (serial number 3) back to the tank, no oil pressure makes 1 and 2 port intercommunication, right side of the motor in the free follow-up state.
[0036] As shown, in use, due to the low load pressure is not enough to open the sequence control valve 50, at this time only need to work left motor, right motor follow-up. Its hydraulic working principle: variable oil pump 10 A port output pressure oil, through the three-way selector valve 30 1-2, reversing valve 40 to the first control valve 60 and the second control valve 70 control end (serial number 3), at this time the first control valve 60 and the second control valve 70 closed, that is, not through, so the pressure oil through the left side of the motor 20 A1, B1 back to the variable oil pump 10 B port, drive the left side of the motor positive rotation. At the same time the third control valve 80 control end (serial number 3) back to the tank, no oil pressure makes 1 and 2 port intercommunication, right side of the motor in the free follow-up state. Figure 3 As shown, in use, due to the low load pressure is not enough to open the sequence control valve 50, at this time only need to work left motor, right motor follow-up. Its hydraulic working principle: variable oil pump 10 A port output pressure oil, through the three-way selector valve 30 1-2, reversing valve 40 to the first control valve 60 and the second control valve 70 control end (serial number 3), at this time the first control valve 60 and the second control valve 70 closed, that is, not through, so the pressure oil through the left side of the motor 20 A1, B1 back to the variable oil pump 10 B port, drive the left side of the motor positive rotation. At the same time the third control valve 80 control end (serial number 3) back to the tank, no oil pressure makes 1 and 2 port intercommunication, right side of the motor in the free follow-up state.
[0037] As shown, in use, due to the low load pressure is not enough to open the sequence control valve 50, at this time only need to work left motor, right motor follow-up. Its hydraulic working principle: variable oil pump 10 A port output pressure oil, through the three-way selector valve 30 1-2, reversing valve 40 to the first control valve 60 and the second control valve 70 control end (serial number 3), at this time the first control valve 60 and the second control valve 70 closed, that is, not through, so the pressure oil through the left side of the motor 20 A1, B1 back to the variable oil pump 10 B port, drive the left side of the motor positive rotation. At the same time the third control valve 80 control end (serial number 3) back to the tank, no oil pressure makes 1 and 2 port intercommunication, right side of the motor in the free follow-up state. Figure 4 As shown, in use, due to the low load pressure is not enough to open the sequence control valve 50, at this time only need to work left motor, right motor follow-up. Its hydraulic working principle: variable oil pump 10 A port output pressure oil, through the three-way selector valve 30 1-2, reversing valve 40 to the first control valve 60 and the second control valve 70 control end (serial number 3), at this time the first control valve 60 and the second control valve 70 closed, that is, not through, so the pressure oil through the left side of the motor 20 A1, B1 back to the variable oil pump 10 B port, drive the left side of the motor positive rotation. At the same time the third control valve 80 control end (serial number 3) back to the tank, no oil pressure makes 1 and 2 port intercommunication, right side of the motor in the free follow-up state.
[0038] At the same time the variable oil pump 10 A port output pressure oil, through the left side of the motor A1-B1 drive left side of the motor rotation, and back to the variable oil pump 10 B port; At the same time the pressure oil through the second control valve 70 1-2, right side of the motor 90 A2-B2 drive right side of the motor rotation, through the first control valve 60 2-1, back to the variable oil pump 10 B port.
[0039] As shown, in use, due to the low load pressure is not enough to open the sequence control valve 50, at this time only need to work left motor, right motor follow-up. Its hydraulic working principle: variable oil pump 10 A port output pressure oil, through the three-way selector valve 30 1-2, reversing valve 40 to the first control valve 60 and the second control valve 70 control end (serial number 3), at this time the first control valve 60 and the second control valve 70 closed, that is, not through, so the pressure oil through the left side of the motor 20 A1, B1 back to the variable oil pump 10 B port, drive the left side of the motor positive rotation. At the same time the third control valve 80 control end (serial number 3) back to the tank, no oil pressure makes 1 and 2 port intercommunication, right side of the motor in the free follow-up state. Figure 5As shown, with the load becoming larger, the pressure increases, the system opens the sequence control valve 50, the system switches to the left motor and the right motor driving at the same time to increase the torque. The hydraulic working principle: the B port of the variable oil pump 10 outputs pressure oil, which passes through the 3-2-sequential control valve 50 of the three-way selector valve 30 to make the reversing valve 40 reverse, and at the same time, the hydraulic oil of the 2 port of the three-way selector valve 30 passes through the reversing valve 40 to the 3 port of the third control valve 80, so that the third control valve 80 is closed, at this time, the control end (serial number 3) of the first control valve 60 and the second control valve 70 is connected to the oil tank, and the first control valve 60 and the second control valve 70 are in the open state.
[0040] At the same time, the pressure oil output by the B port of the variable oil pump 10 drives the left motor to rotate through the left motor B1-A1, and returns to the A port of the variable oil pump 10; at the same time, the pressure oil drives the right motor to rotate through the second control valve 70 2-1, the right motor 90 B2-A2, and returns to the A port of the variable oil pump 10 through the first control valve 60 1-2.
[0041] The mining machine cutting cylinder hydraulic control system can expand the stepless speed regulation interval of the cutting cylinder, improve production efficiency, and automatically switch between high-speed low-torque and low-speed high-torque modes according to the working conditions, has stronger adaptability, and has higher production efficiency.
[0042] The above-mentioned is only an embodiment of the utility model, and the specific structure and characteristics of the scheme and the like are not described in detail. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.
Claims
1. A hydraulic control system for a mining machine cutting drum, characterized by, The variable oil pump (10) is connected with a first pipeline and a second pipeline, a left motor (20) and a three-way selector valve (30) are arranged between the first pipeline and the second pipeline, a first control valve (60) is connected at the end of the first pipeline, a second control valve (70) is connected at the end of the second pipeline, a reversing valve (40) is arranged at the other end of the three-way selector valve (30), a sequence control valve (50) is connected with the reversing valve (40), the position of the reversing valve (40) is selected through the sequence control valve (50), one port of the reversing valve (40) is connected with the control end of the first control valve (60) and the second control valve (70), the other port of the reversing valve (40) is connected with a third control valve (80), the first control valve (60) and the second control valve (70) are provided with a closed pipeline at one end, the third control valve (80) is connected in parallel on the closed pipeline, and a right motor (90) is arranged on the closed pipeline.
2. The mining machine cutting drum hydraulic control system of claim 1, wherein: The reversing valve (40) is a two-position four-way hydraulic control reversing valve, the sequence control valve (50) is a sequence valve, and the reversing is realized by controlling the two-position four-way hydraulic control reversing valve through the sequence valve.
3. The mining machine cutting drum hydraulic control system of claim 1, wherein: The reversing valve (40) is a two-position four-way electromagnetic reversing valve, the sequence control valve (50) is a pressure switch, and the reversing is realized by controlling the two-position four-way electromagnetic reversing valve through the pressure switch.
4. A mining machine cutting drum hydraulic control system as claimed in claim 2 or 3, characterised in that: The three-way selector valve (30) is a shuttle valve.
5. The mining machine cutting drum hydraulic control system of claim 4, wherein: The first control valve (60), the second control valve (70) and the third control valve (80) are two-way cartridge valves.