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CN217502113U - Hydraulic work station of mine hoist servo variable pump - Google Patents

Hydraulic work station of mine hoist servo variable pump Download PDF

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Publication number
CN217502113U
CN217502113U CN202221174878.3U CN202221174878U CN217502113U CN 217502113 U CN217502113 U CN 217502113U CN 202221174878 U CN202221174878 U CN 202221174878U CN 217502113 U CN217502113 U CN 217502113U
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hydraulic
brake
energy storage
directional valve
electromagnetic directional
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田博
刘立平
刘满仓
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Luoyang Permanent Magnet Heavy Machinery Equipment Co ltd
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Luoyang Permanent Magnet Heavy Machinery Equipment Co ltd
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Abstract

A hydraulic work station of a mine hoist servo variable pump comprises a hydraulic source unit and a brake control unit; the hydraulic source unit comprises a servo motor, a hydraulic pump and a proportional overflow valve, the servo motor is in driving connection with the hydraulic pump, the output of the hydraulic pump is connected with two hydraulic pipelines, one hydraulic pipeline returns to an oil tank through the proportional overflow valve, and the other hydraulic pipeline is connected to the brake control unit; when the pressure of the hydraulic workstation reaches a set value, the rotation speed of the servo motor is controlled to be reduced, so that the output flow of the hydraulic oil of the constant-pressure hydraulic pump is greatly reduced, and only little hydraulic oil is returned to the oil tank through the proportional overflow valve on the premise of ensuring the set pressure of the hydraulic workstation to be stable except for the leakage of a part of hydraulic oil compensation system, so that the temperature rise generated by the overflow of the hydraulic oil is greatly reduced, and the energy waste is reduced; meanwhile, the problem of rapid degradation of the performance of the hydraulic oil caused by the fact that the hydraulic oil is at a high temperature for a long time is avoided, and the service life of the hydraulic oil is prolonged.

Description

Hydraulic work station of mine hoist servo variable pump
Technical Field
The invention relates to the technical field of hydraulic workstations for mine hoists, in particular to a hydraulic workstation of a servo variable pump of a mine hoist.
Background
The mine hoist is one of the key devices of mine enterprises, undertakes the important tasks of conveying mine products, equipment, materials and operating personnel above and below the mine, and has extremely strict requirements on safety; the mine hoist braking system is a key part related to the safety performance of the mine hoist, a hydraulic workstation in the braking system is a key component, and the performance and the reliability of the hydraulic workstation play a decisive role in the safety of the mine hoist.
At present, a constant-speed motor is generally adopted to drive a swash plate type constant-pressure variable pump in a hydraulic workstation for a mine hoist, when the swash plate type constant-pressure variable pump works, as long as the pressure of the hydraulic workstation reaches a set value, pilot oil pushes a reversing valve of the constant-pressure variable pump to reverse, then high-pressure oil enters a variable mechanism of the swash plate type constant-pressure variable pump to push a swash plate of the swash plate type constant-pressure variable pump to carry out variable until the variable of the swash plate reaches a minimum angle, and then the swash plate type constant-pressure variable pump works under the minimum flow to compensate hydraulic oil leakage; the variable mode leads the swash plate type constant pressure variable pump to work only in two states of maximum flow and minimum flow, when the swash plate type constant pressure variable pump works in minimum flow, a part of hydraulic oil is used for compensating system leakage, the flow of redundant hydraulic oil is still large and needs to overflow through a proportional overflow valve, and the hydraulic oil generates higher temperature rise when working for a long time, thereby causing energy waste; meanwhile, the hydraulic oil is in a high-temperature state for a long time, and the performance degradation of the hydraulic oil is accelerated, so that the service life of the hydraulic oil is shortened.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses a hydraulic work station of a mine hoist servo variable pump, which comprises a hydraulic source unit and a brake control unit; the hydraulic source unit comprises a servo motor, a hydraulic pump and a proportional overflow valve, the servo motor is in driving connection with the hydraulic pump, the output of the hydraulic pump is connected with two hydraulic pipelines, one hydraulic pipeline returns to an oil tank through the proportional overflow valve, and the other hydraulic pipeline is connected to the brake control unit; when the pressure of a hydraulic workstation reaches a set value, the rotating speed of a servo motor is controlled to be reduced, so that the output flow of hydraulic oil of the hydraulic pump is greatly reduced, and only little hydraulic oil is returned to an oil tank through a proportional overflow valve on the premise of ensuring the set pressure of the hydraulic workstation to be stable except for the leakage of a part of hydraulic oil compensation system, so that the temperature rise generated by the overflow of the hydraulic oil is greatly reduced, and the energy waste is reduced; meanwhile, the problem of rapid degradation of the performance of the hydraulic oil caused by the fact that the hydraulic oil is at a high temperature for a long time is avoided, and the service life of the hydraulic oil is prolonged.
In order to realize the purpose, the invention adopts the following technical scheme: a hydraulic work station of a mine hoist servo variable pump comprises a hydraulic source unit and a brake control unit; the hydraulic source unit comprises a servo motor, a hydraulic pump and a proportional overflow valve, the servo motor is in driving connection with the hydraulic pump, the output of the hydraulic pump is connected with two hydraulic pipelines, one hydraulic pipeline returns to an oil tank through the proportional overflow valve, and the other hydraulic pipeline is connected to the brake control unit; in the initial working stage of the hydraulic workstation of the servo variable pump, the servo motor runs at a high speed, the working pressure of the system is quickly established, and the response speed of the system is improved; when the pressure of the hydraulic workstation reaches a set value, the rotating speed of the servo motor is controlled to be reduced, the hydraulic oil output flow of the hydraulic pump is reduced when the hydraulic workstation works in a low-speed working mode, and the hydraulic oil output by the overflow of the proportional overflow valve is reduced to the maximum extent on the premise of ensuring the stability of the set pressure of the hydraulic workstation, so that the temperature rise generated by the overflow of the hydraulic oil is greatly reduced, and the energy waste is reduced; meanwhile, the problem of rapid degradation of the performance of the hydraulic oil caused by the fact that the hydraulic oil is at a high temperature for a long time is avoided, and the service life of the hydraulic oil is prolonged.
Furthermore, a hydraulic pump pressure sensor is arranged on an output hydraulic pipeline of the hydraulic pump and used for monitoring the hydraulic oil pressure output by the hydraulic pump.
Further, the device also comprises an energy storage unit; the output of the connecting hydraulic pump is divided into three hydraulic pipelines, wherein one hydraulic pipeline returns to an oil tank through a proportional overflow valve, the other hydraulic pipeline is connected to a brake control unit, and the third hydraulic pipeline is connected to an energy storage unit; the energy storage unit is also connected with the brake control unit through a hydraulic pipeline; the energy storage unit is used for maintaining the hydraulic oil pressure of a hydraulic work station of the mine hoist servo variable pump in a constant deceleration braking work mode, and the braking force is kept constant.
Furthermore, the brake control unit comprises a brake electromagnetic directional valve A, a brake electromagnetic directional valve B, a brake electromagnetic directional valve C, a brake electromagnetic directional valve D and a brake pressure sensor; the hydraulic pipeline of the hydraulic source unit connected to the brake control unit is connected to one of oil inlets of a brake electromagnetic directional valve A and a brake electromagnetic directional valve B which are arranged in parallel, oil outlets of the brake electromagnetic directional valve A and the brake electromagnetic directional valve B are divided into two hydraulic pipelines, one hydraulic pipeline is connected to a brake of the mine hoist, and the other hydraulic pipeline is connected to an oil tank through a brake electromagnetic directional valve C and a brake electromagnetic directional valve D which are arranged in parallel; the oil inlet pipeline of the braking electromagnetic directional valve C is connected to the normally closed port, and the oil inlet pipeline of the braking electromagnetic directional valve D is connected to the normally open port; the other oil inlets of the braking electromagnetic reversing valve A and the braking electromagnetic reversing valve B which are arranged in parallel are connected to the energy storage unit; in the braking control unit, a braking electromagnetic directional valve A, a braking electromagnetic directional valve B, a braking electromagnetic directional valve C and a braking electromagnetic directional valve D are arranged in parallel, and are designed for redundancy in reliability of a hydraulic working station of a mine hoist servo variable pump; the oil inlet pipeline of the braking electromagnetic directional valve C is connected to the normally closed port, the oil inlet pipeline of the braking electromagnetic directional valve D is connected to the oil way of the normally closed port, and therefore the oil discharge channel of the brake can be established no matter the mine hoist servo variable pump hydraulic work station is in power failure or out of control under the condition of emergency braking, and the braking reliability of the mine hoist is guaranteed.
Furthermore, a brake pressure sensor is arranged on a hydraulic pipeline connected with the brake and used for monitoring the working hydraulic oil pressure of the brake.
Furthermore, the energy storage unit comprises an energy accumulator, an energy storage electromagnetic directional valve, an energy storage overflow valve A, an energy storage proportional directional valve, an energy storage overflow valve B and an isolation one-way valve; a hydraulic pipeline of the hydraulic source unit connected to the energy storage unit is connected to an oil inlet of the energy accumulator, the energy storage electromagnetic directional valve and the energy storage proportional directional valve through an isolation one-way valve; the hydraulic pipeline connected with the brake control unit is connected to oil outlets of the energy storage electromagnetic reversing valve and the energy storage proportional reversing valve; an oil return port of the energy storage electromagnetic directional valve is connected to an oil tank through an energy storage overflow valve A; an oil return port of the energy storage proportional reversing valve is directly connected to an oil tank; the isolation one-way valve is used for isolating the oil circuit connection between the energy storage unit and the hydraulic source unit after the energy storage unit builds the pressure of the energy accumulator; in the normal working process of the mine hoist, the energy storage electromagnetic directional valve and the energy storage proportional directional valve are in a power-off state, the energy storage unit, the hydraulic source unit and the brake control unit are in an isolation state, the energy storage unit does not participate in the brake control of the mine hoist, and when the mine hoist enters a wellhead secondary brake mode of constant deceleration brake and emergency brake, the energy storage unit participates in the brake control of the mine hoist; when the mine hoist enters a constant deceleration braking mode, a servo motor of a hydraulic source unit stops working, an energy storage proportional reversing valve is electrified to work, an energy accumulator is connected with an oil way of a brake through the energy storage proportional reversing valve, and the constant deceleration hydraulic oil pressure of the brake is limited and maintained through the action of the energy storage proportional reversing valve; when the mine hoist enters a wellhead secondary braking mode of emergency braking, the energy storage proportional reversing valve is powered off, the energy storage electromagnetic reversing valve is powered on, the energy accumulator is connected with an oil way of the brake through the energy storage electromagnetic reversing valve, and the hydraulic oil pressure of the brake is limited through the energy storage overflow valve A.
Furthermore, a hydraulic pipeline connected between the energy storage unit and the brake control unit is also provided with an energy storage overflow valve B connected to the oil tank, and when the mine hoist enters a constant deceleration braking mode, the energy storage proportional reversing valve and the energy storage overflow valve B act together to better limit and maintain the hydraulic oil pressure of the brake.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a hydraulic work station of a mine hoist servo variable pump, which comprises a hydraulic source unit and a brake control unit, wherein the hydraulic source unit is connected with the brake control unit; the hydraulic source unit comprises a servo motor, a hydraulic pump and a proportional overflow valve, the servo motor is in driving connection with the hydraulic pump, the output of the hydraulic pump is connected with two hydraulic pipelines, one hydraulic pipeline returns to an oil tank through the proportional overflow valve, and the other hydraulic pipeline is connected to the brake control unit; when the pressure of a hydraulic workstation reaches a set value, the rotating speed of a servo motor is controlled to be reduced, so that the output flow of hydraulic oil of the hydraulic pump is greatly reduced, and only little hydraulic oil is returned to an oil tank through a proportional overflow valve on the premise of ensuring the set pressure of the hydraulic workstation to be stable except for the leakage of a part of hydraulic oil compensation system, so that the temperature rise generated by the overflow of the hydraulic oil is greatly reduced, and the energy waste is reduced; meanwhile, the problem of rapid degradation of the performance of the hydraulic oil caused by the fact that the hydraulic oil is at a high temperature for a long time is avoided, and the service life of the hydraulic oil is prolonged; after the hydraulic workstation of the mine hoist adopts the servo motor, the servo motor can operate in three modes of high speed, normal speed and low speed, wherein the high-speed operation mode can quickly establish the system working pressure of the hydraulic workstation of the mine hoist, so that the response speed of the system is correspondingly improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a hydraulic workstation of a mine hoist servo variable pump;
FIG. 2 is a schematic diagram of a second embodiment of a hydraulic work station of a mine hoist servo variable pump;
FIG. 3 is a schematic diagram of a hydraulic source unit;
FIG. 4 is a schematic diagram of an energy storage unit;
FIG. 5 is a schematic diagram of a brake control unit;
FIG. 6 is a table showing the working linkage of a hydraulic workstation with a servo variable pump according to an embodiment;
FIG. 7 is a table showing the working linkage of the hydraulic workstation with two servo variable pumps according to the embodiment.
In the figure: 1. a hydraulic pressure source unit; 1.1, a servo motor; 1.2, a hydraulic pump; 1.3, a proportional overflow valve; 1.4, a hydraulic pump pressure sensor; 2. an energy storage unit; 2.1, an energy accumulator; 2.2, an energy storage electromagnetic directional valve; 2.3, an energy storage overflow valve A; 2.4, an energy storage proportional reversing valve; 2.5, an energy storage overflow valve B; 2.8, isolating the one-way valve; 3. a brake control unit; 3.1, braking the electromagnetic directional valve A; 3.2, braking the electromagnetic directional valve B; 3.3, braking the electromagnetic directional valve C; 3.4, braking the electromagnetic directional valve D; 3.7, a brake pressure sensor.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
The first embodiment is as follows:
a hydraulic work station of a mine hoist servo variable pump comprises a hydraulic source unit 1 and a brake control unit 3; the hydraulic source unit 1 comprises a servo motor 1.1, a hydraulic pump 1.2 and a proportional overflow valve 1.3, the servo motor 1.1 is driven to be connected with the hydraulic pump 1.2, the output of the hydraulic pump 1.2 is divided into two hydraulic pipelines, one hydraulic pipeline returns to an oil tank through the proportional overflow valve 1.3, the other hydraulic pipeline is connected to a brake control unit 3, and a hydraulic pump pressure sensor 1.4 is arranged on the output hydraulic pipeline of the hydraulic pump 1.2; the brake control unit 3 comprises a brake electromagnetic directional valve A3.1, a brake electromagnetic directional valve B3.2, a brake electromagnetic directional valve C3.3, a brake electromagnetic directional valve D3.4 and a brake pressure sensor 3.7; a hydraulic pipeline of the hydraulic source unit 1 connected to the brake control unit 3 is connected to one of oil inlets of a brake electromagnetic directional valve A3.1 and a brake electromagnetic directional valve B3.2 which are arranged in parallel, oil outlets of the brake electromagnetic directional valve A3.1 and the brake electromagnetic directional valve B3.2 are divided into two hydraulic pipelines, one of the hydraulic pipelines is connected to a brake of the mine hoist, the other hydraulic pipeline is connected to an oil tank through a brake electromagnetic directional valve C3.3 and a brake electromagnetic directional valve D3.4 which are arranged in parallel, and a brake pressure sensor 3.7 is further arranged on the hydraulic pipeline connected with the brake; the oil inlet pipeline of the braking electromagnetic directional valve C3.3 is connected to the normally closed port, and the oil inlet pipeline of the braking electromagnetic directional valve D3.4 is connected to the normally open port;
in the first embodiment, the hydraulic work station of the mine hoist servo variable pump only has three working modes of normal brake release, working brake and emergency brake (wellhead first-level brake); in the three working modes, the working states of all the hydraulic components refer to a working linkage table in the specification and the attached figure 6;
and (3) establishing a normal brake release working mode: in an initial state, the proportional overflow valve 1.3, the brake electromagnetic directional valve A3.1, the brake electromagnetic directional valve B3.2 and the brake electromagnetic directional valve D3.4 are powered on (the control current of the proportional overflow valve 1.3 is gradually increased, so that the overflow quantity of the proportional overflow valve 1.3 is gradually reduced to a set value, pressure impact generated when the working pressure of the system is built is avoided), the brake electromagnetic directional valve C3.3 is powered off, and an oil return channel of the brake is completely closed; firstly, a servo motor 1.1 rotates at a high speed to quickly enable a brake to establish working pressure and the brake to be released; when the working pressure of the brake reaches a set value, the servo motor 1.1 enters a low-speed working mode, part of hydraulic oil output by the hydraulic pump 1.2 is compensated for system leakage, and only little hydraulic oil is output to the oil tank through the proportional overflow valve 1.3 on the premise of ensuring the stability of the set pressure of the brake, so that the temperature rise caused by the overflow of the hydraulic oil is greatly reduced; in a normal brake release working mode, PID control is carried out on the control current of the proportional overflow valve 1.3 through a feedback signal of a brake pressure sensor 3.7 so as to maintain the stability of the brake working pressure in the normal brake release working mode;
when the mine hoist servo variable pump hydraulic work station is in a work braking mode, the work braking is controlled only by controlling the control current of the proportional overflow valve 1.3; after the working braking mode is entered, the control current of the proportional overflow valve 1.3 is reduced to 0, the overflow amount is increased, but the output flow of the hydraulic pump 1.2 is kept unchanged at the moment, so that the working pressure of the brake is reduced to switch on the brake to generate braking force; (in this case, pressure regulation is not performed)
When the speed of the mine hoist is reduced to a set value within a set unit time under a working braking mode, a servo variable pump hydraulic work station of the mine hoist enters an emergency braking (wellhead first-stage braking) mode; in an emergency braking (primary braking at a wellhead) mode, the servo motor 1.1 stops working, the proportional overflow valve 1.3 is completely opened after power failure, the brake electromagnetic directional valve A3.1, the brake electromagnetic directional valve B3.2 and the brake electromagnetic directional valve D3.4 are completely opened after power failure, the brake electromagnetic directional valve C3.3 is electrified, at the moment, oil return passages of the brake electromagnetic directional valve A3.1 and the brake electromagnetic directional valve B3.2 are communicated with an oil tank through the proportional overflow valve 1.3, the brake electromagnetic directional valve C3.3 and the brake electromagnetic directional valve D3.4 are directly communicated with the oil tank, and the brake is quickly unloaded, switched on and locked to generate emergency braking (primary braking at the wellhead).
Example two:
in the second embodiment, the energy storage unit 2 is further included; the output of the connecting hydraulic pump 1.2 is divided into three hydraulic pipelines, wherein one hydraulic pipeline returns to an oil tank through a proportional overflow valve 1.3, the other hydraulic pipeline is connected to a brake control unit 3, and the third hydraulic pipeline is connected to an energy storage unit 2; the energy storage unit 2 is also connected with the brake control unit 3 through a hydraulic pipeline; the energy storage unit 2 comprises an energy storage device 2.1, an energy storage electromagnetic directional valve 2.2, an energy storage overflow valve A2.3, an energy storage proportional directional valve 2.4, an energy storage overflow valve B2.5 and an isolation one-way valve 2.8; a hydraulic pipeline of the hydraulic source unit 1 connected to the energy storage unit 2 is connected to oil inlets of an energy accumulator 2.1, an energy storage electromagnetic directional valve 2.2 and an energy storage proportional directional valve 2.4 through an isolation one-way valve 2.8; a hydraulic pipeline connected with the brake control unit 3 is connected to oil inlets of the energy storage electromagnetic directional valve 2.2 and the energy storage proportional directional valve 2.4; an oil return port of the energy storage electromagnetic directional valve 2.2 is connected to an oil tank through an energy storage overflow valve A2.3; the oil return port of the energy storage proportional reversing valve 2.4 is directly connected to an oil tank; a hydraulic pipeline connected between the energy storage unit 2 and the brake control unit 3 is also provided with an energy storage overflow valve B2.5 connected to an oil tank;
in the second embodiment, the brake system comprises five working modes of normal brake release, working brake, constant deceleration brake, emergency brake (wellhead secondary brake) and emergency brake (wellhead primary brake), wherein under the working modes of normal brake release, working brake and emergency brake (wellhead primary brake), the energy storage electromagnetic directional valve 2.2 and the energy storage proportional directional valve 2.4 are always in a power-off state, and the working states of other hydraulic components are the same as those of the first embodiment; in the second embodiment, the working states of the hydraulic components in the constant deceleration braking mode and the emergency braking mode (wellhead secondary braking mode) are only described below, and the working linkage table in the attached figure 7 of the specification is referred collectively;
when the speed of the mine hoist is reduced to a set value within a set unit time under a working braking mode, a servo variable pump hydraulic work station of the mine hoist firstly enters a constant deceleration braking mode, and the working pressure of a brake is provided by an energy storage unit 2 under the constant deceleration braking mode; under the constant deceleration braking mode, the servo motor 1.1 stops working, the proportional overflow valve 1.3 is completely opened when power is lost, and the hydraulic source unit 1 does not provide hydraulic oil for the braking control unit 3 any more; the brake electromagnetic directional valve A3.1 and the brake electromagnetic directional valve B3.2 are powered off, the energy storage electromagnetic directional valve 2.2 is still in a power-off state, the energy storage proportional directional valve 2.4 is switched to be in a power-on state, the switching energy storage unit 2 provides hydraulic oil for the brake control unit 3, the pressure of the hydraulic oil is limited and adjusted through the combined action of the energy storage proportional directional valve 2.4 and an energy storage overflow valve B2.5, the pressure of the hydraulic oil input to the brake is adjusted in real time according to the speed feedback of the elevator, and the mine elevator is subjected to constant deceleration braking; after entering the constant deceleration braking mode, the braking electromagnetic directional valve D3.4 starts timing delay power loss (power loss is not yet performed in the constant deceleration braking mode), and the braking electromagnetic directional valve C3.3 starts timing delay power up (power up is not yet performed in the constant deceleration braking mode);
when the speed of the mine hoist is reduced to a set value within a set unit time (at the moment, the brake electromagnetic directional valve D3.4 is powered off in a timing delay way, the brake electromagnetic directional valve C3.3 is powered on in a timing delay way and does not reach the set time, the states of the brake electromagnetic directional valve D3.4 and the brake electromagnetic directional valve C3.3 are not changed, but the delay time is still continuously timed), the hydraulic work station of a servo variable pump of the mine hoist is switched to an emergency brake (secondary braking at a wellhead) mode, and the working pressure of a brake is provided by an energy storage unit 2 in the emergency brake (secondary braking at the wellhead) mode; after entering an emergency braking (wellhead secondary braking) mode, the energy storage electromagnetic directional valve 2.2 is electrified, the energy storage proportional directional valve 2.4 is deenergized, hydraulic oil is input to the brake through the energy storage electromagnetic directional valve 2.2, and the pressure of the hydraulic oil is limited by an energy storage overflow valve A2.3 and is smaller than that of the hydraulic oil in a constant deceleration braking mode, so that the brake can provide larger braking resistance;
when the mine hoist reaches the time delay power loss of the braking electromagnetic directional valve D3.4 and the time delay power up of the braking electromagnetic directional valve C3.3 reaches the set time in the emergency braking (second-stage braking at the well head) mode, but the mine hoist still does not stop, the braking electromagnetic directional valve D3.4 is powered down, the braking electromagnetic directional valve C3.3 is powered up, the energy storage electromagnetic directional valve 2.2 and the energy storage proportional directional valve 2.4 are powered down, and the hydraulic work station of the servo variable pump of the mine hoist enters the emergency braking (first-stage braking at the well head) mode; in an emergency braking (primary braking at a wellhead) mode, hydraulic oil is not provided for the brake control unit 3 by the hydraulic source unit 1 and the energy storage unit 2 any more, the hydraulic oil in the brake is quickly released to an oil tank through the brake electromagnetic directional valve A3.1, the brake electromagnetic directional valve B3.2, the brake electromagnetic directional valve C3.3 and the brake electromagnetic directional valve D3.4, the brake quickly unloads oil, closes and locks, and emergency braking (primary braking at a wellhead) is generated.
Supplementary explanation: the reliable redundancy design of the brake electromagnetic directional valve A3.1, the brake electromagnetic directional valve B3.2, the brake electromagnetic directional valve C3.3 and the brake electromagnetic directional valve D3.4 of the hydraulic work station of the mine hoist servo variable pump can ensure the release of hydraulic oil in the brake under emergency conditions under the condition that the hydraulic work station of the mine hoist servo variable pump is completely de-energized and under the condition that any three electromagnetic directional valves of the brake electromagnetic directional valve A3.1, the brake electromagnetic directional valve B3.2, the brake electromagnetic directional valve C3.3 and the brake electromagnetic directional valve D3.4 are blocked due to faults, so that the brake can rapidly unload oil, close and lock, and generate emergency braking (primary braking at a well head), thereby having extremely high operation reliability.
The present invention is not described in detail in the prior art.

Claims (7)

1. The utility model provides a servo variable pump hydraulic pressure workstation of mine lifting machine, characterized by: comprises a hydraulic source unit (1) and a brake control unit (3); the hydraulic source unit (1) comprises a servo motor (1.1), a hydraulic pump (1.2) and a proportional overflow valve (1.3), the servo motor (1.1) is driven to be connected with the hydraulic pump (1.2), the output of the hydraulic pump (1.2) is connected with two hydraulic pipelines, one hydraulic pipeline returns to an oil tank through the proportional overflow valve (1.3), and the other hydraulic pipeline is connected to the brake control unit (3).
2. The hydraulic work station of a mine hoist servo variable pump of claim 1, wherein: a hydraulic pump pressure sensor (1.4) is arranged on an output hydraulic pipeline of the hydraulic pump (1.2).
3. The hydraulic work station of a mine hoist servo variable pump of claim 1, wherein: the energy storage device also comprises an energy storage unit (2); the output of the connecting hydraulic pump (1.2) is divided into three hydraulic pipelines, wherein one hydraulic pipeline returns to an oil tank through a proportional overflow valve (1.3), the other hydraulic pipeline is connected to a brake control unit (3), and the third hydraulic pipeline is connected to an energy storage unit (2); the energy storage unit (2) is connected with the brake control unit (3) through a hydraulic pipeline.
4. The mining hoist servo variable pump hydraulic station as set forth in claim 3, wherein: the brake control unit (3) comprises a brake electromagnetic directional valve A (3.1), a brake electromagnetic directional valve B (3.2), a brake electromagnetic directional valve C (3.3), a brake electromagnetic directional valve D (3.4) and a brake pressure sensor (3.7); a hydraulic pipeline of the hydraulic source unit (1) connected to the brake control unit (3) is connected to one of oil inlets of a brake electromagnetic directional valve A (3.1) and a brake electromagnetic directional valve B (3.2) which are arranged in parallel, oil outlets of the brake electromagnetic directional valve A (3.1) and the brake electromagnetic directional valve B (3.2) are divided into two hydraulic pipelines, one of the hydraulic pipelines is connected to a brake of the mine hoist, and the other hydraulic pipeline is connected to an oil tank through a brake electromagnetic directional valve C (3.3) and a brake electromagnetic directional valve D (3.4) which are arranged in parallel; the oil inlet pipeline of the braking electromagnetic directional valve C (3.3) is connected to the normally closed port, and the oil inlet pipeline of the braking electromagnetic directional valve D (3.4) is connected to the normally open port; and oil inlets of the other paths of the braking electromagnetic directional valve A (3.1) and the braking electromagnetic directional valve B (3.2) which are arranged in parallel are connected to the energy storage unit (2).
5. The hydraulic work station of the servo variable pump of the mine hoist as set forth in claim 4, characterized in that: and a brake pressure sensor (3.7) is also arranged on a hydraulic pipeline connected with the brake.
6. The mining hoist servo variable pump hydraulic station as set forth in claim 4, wherein: the energy storage unit (2) comprises an energy storage device (2.1), an energy storage electromagnetic directional valve (2.2), an energy storage overflow valve A (2.3), an energy storage proportional directional valve (2.4), an energy storage overflow valve B (2.5) and an isolation one-way valve (2.8); a hydraulic pipeline of the hydraulic source unit (1) connected to the energy storage unit (2) is connected to oil inlets of the energy accumulator (2.1), the energy storage electromagnetic directional valve (2.2) and the energy storage proportional directional valve (2.4) through an isolation one-way valve (2.8); a hydraulic pipeline connected with the brake control unit (3) is connected to oil outlets of the energy storage electromagnetic directional valve (2.2) and the energy storage proportional directional valve (2.4); an oil return port of the energy storage electromagnetic directional valve (2.2) is connected to an oil tank through an energy storage overflow valve A (2.3); the oil return port of the energy storage proportional reversing valve (2.4) is directly connected to the oil tank.
7. The hydraulic workstation of a servo variable pump of a mine hoist as claimed in claim 6, characterized in that: and a hydraulic pipeline connected between the energy storage unit (2) and the brake control unit (3) is also provided with an energy storage overflow valve B (2.5) connected to an oil tank.
CN202221174878.3U 2022-05-17 2022-05-17 Hydraulic work station of mine hoist servo variable pump Active CN217502113U (en)

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Application Number Priority Date Filing Date Title
CN202221174878.3U CN217502113U (en) 2022-05-17 2022-05-17 Hydraulic work station of mine hoist servo variable pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221174878.3U CN217502113U (en) 2022-05-17 2022-05-17 Hydraulic work station of mine hoist servo variable pump

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CN217502113U true CN217502113U (en) 2022-09-27

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CN202221174878.3U Active CN217502113U (en) 2022-05-17 2022-05-17 Hydraulic work station of mine hoist servo variable pump

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