CN218542769U - Dual-redundancy servo valve block - Google Patents

Abstract

The utility model relates to a servo valve technical field just discloses a two redundant servo valve pieces, which comprises a bracket, the top of support is provided with the casing, the top of casing is provided with two servo valves, two the top of casing still is provided with the off-load valve, the externally mounted of off-load valve has hexagon socket screw plug one, the top of casing is provided with the pressure measurement and connects, be provided with two filter cores on the lateral wall of casing, be provided with eight adjustable choke valves on the lateral wall of casing, be provided with two coupling two on the lateral wall of casing, the top of casing is provided with two rings screw, the orifice has been seted up on the lateral wall of casing, fixedly connected with terminal box on the lateral wall of support. This dual-redundancy servo valve block, the last filter that increases of servo valve block can guarantee oily cleanliness, prevents the servo valve bite, designs 2 servo valves, through control logic, can switch on line, guarantees that one of them servo valve has the problem, can not appear shutting down.

Description

Dual-redundancy servo valve block

Technical Field

The utility model relates to a servovalve technical field specifically is a dual-redundancy servovalve piece.

Background

The hydraulic control servo valve is mainly an electro-hydraulic servo valve which correspondingly outputs modulated flow and pressure after receiving an electric analog signal. The device is an electro-hydraulic conversion element and a power amplification element, and can convert a low-power weak electric input signal into high-power hydraulic energy (flow and pressure) for output. In an electro-hydraulic servo system, an electric part is connected with a hydraulic part to realize conversion of electro-hydraulic signals and hydraulic amplification. The electro-hydraulic servo valve is the core of electro-hydraulic servo system control.

At present, servo valve blocks produced at home and abroad are all single servo valve control oil motors, the servo valves cannot be replaced on line, meanwhile, the position cannot be kept, the safety is lower, a redundant electro-hydraulic converter is arranged at a low pressure, the blank is filled, and no redundant servo valve block exists in a high-pressure system at present.

To this end, a dual redundant servo valve block is proposed to solve the problems mentioned in the background above.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dual redundant servo valve piece to solve the problem that proposes among the above-mentioned background art.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a dual-redundancy servo valve block, includes the support, the top of support is provided with the casing, the top of casing is provided with two servo valves, two the top of casing still is provided with the unloading valve, the externally mounted of unloading valve has hexagon socket screw plug one, the top of casing is provided with the pressure measurement joint, be provided with two filter cores on the lateral wall of casing, be provided with eight adjustable choke valves on the lateral wall of casing, the top of casing is provided with solenoid valve one, be provided with seven hexagon socket screw plug two on the lateral wall of casing, be provided with three pipe connector one on the lateral wall of casing, be provided with two solenoid valve two on the lateral wall of casing, be provided with eleven hexagon socket screw plug three on the lateral wall of casing, be provided with two pipe connector two on the lateral wall of casing, the top of casing is provided with two rings screw, the orifice has been seted up on the lateral wall of casing, fixedly connected with the terminal box on the lateral wall of support.

Preferably, the top of the unloading valve is provided with a second hexagon socket head cap screw at a position close to four corners, and the unloading valve is fixedly connected with the shell through the second hexagon socket head cap screw.

Preferably, the two servo valves are symmetrically arranged at the top of the shell, four first socket cap screws are arranged on the outer side walls of the two servo valves, and the two servo valves are fixedly connected with the shell through the first socket cap screws.

Preferably, the first electromagnetic valve is arranged between the two servo valves, four third hexagon socket head cap screws are arranged on the outer side wall of the first electromagnetic valve, and the first electromagnetic valve is fixedly connected with the shell through the third hexagon socket head cap screws.

Preferably, a fourth inner hexagonal socket head cap screw is arranged between the support and the shell, and the support and the shell are fixedly connected through the fourth inner hexagonal socket head cap screw.

Preferably, the two lifting ring screws are diagonally arranged at the top of the shell, and the pressure measuring connector and the two lifting ring screws are diagonally arranged.

Preferably, the device adopts independent double-channel hydraulic control, and the two servo valves respectively correspond to the two control channels.

Preferably, the two filter elements are respectively arranged on two side faces of the outer side wall of the shell, which are deviated from each other, and the two filter elements are respectively arranged corresponding to the two servo valves.

Preferably, the hydraulic principle of the dual-redundancy servo valve block is further included, the hydraulic principle of the dual-redundancy servo valve block is that high-pressure oil enters from a port P of the servo valve block and is divided into two paths, the pressure is 14MPA, the first path enters the servo valve 1 through the adjustable throttle valve 1, passes through a port A, then passes through a port A of the isolation electromagnetic valve 1 and enters an upper cavity of the oil cylinder;

the second path of the first path passes through the adjustable throttle valve 2, enters the servo valve 2 and passes through the port A, then the oil is merged with the first path through an opening A of the isolation electromagnetic valve 2 and enters an upper cavity of the oil cylinder;

meanwhile, the port B of the servo valve is communicated with the port B of the isolation electromagnetic valve and a lower cavity of the oil engine;

if one path of valves has problems, the system can be automatically switched to the other path, meanwhile, the system can give an alarm, and the electromagnetic valve and the servo valve can be replaced on line only by manually closing all 4 adjustable throttle valves with problems in the path, so that the machine set can not be stopped;

if the servo valves 1 and 2 have problems, the isolation electromagnetic valve can be electrified to prevent the servomotor from being closed, so that the position protection effect can be achieved, and operating personnel can replace the servo valves according to conditions to ensure the safety of the unit.

Preferably, the reconstruction logic of the dual redundant servo valve block is further included, and the reconstruction logic of the dual redundant servo valve block includes the following components:

1. the control logic of the newly added isolation solenoid valve is as follows:

a. the manual operation solenoid valve acts or resets;

b. when the current electromagnetic valve corresponds to the servo card as a main card in the running state of the small machine, the servo card control is carried out;

when the loop fault or the deviation between the valve adjusting instruction and the feedback is more than 5%, the electromagnetic valve is electrified to act;

c. when the current servo card is switched from the standby card to the main card within three seconds, the isolation solenoid valve cannot act;

2. the master-slave switching condition of the servo card is as follows:

a. main card DP communication failure (automatic switching inside the servo card);

b. a main card servo channel failure (automatic switching inside the servo card);

c. the two hydraulic motors of the main card have a fault in stroke feedback (automatic switching inside the servo card);

d. the command and feedback deviation of the servomotor is more than 5%, and the servomotor is switched to a standby card (newly added with logic);

e. a manual main/standby switching button (newly added logic);

3. two electromagnetic valve control buttons are added on the main picture, and a secondary confirmation function is provided;

4. the position feedback display of the valve cores of the two servo valves is added to the main picture;

5. the valve setting picture increases the state display of the master and slave servo cards and the setting function of the master and slave servo cards;

6. a manual switching button of a master servo card and a slave servo card is added to a valve setting picture, and a secondary confirmation function is provided;

7. and the valve setting picture is added with the stroke feedback analog quantity display and the state display of the servo servomotor.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is:

first, the utility model discloses increase the filter on the servo valve piece, can guarantee oily cleanliness, prevent the servo valve bite.

Second, the utility model relates to a 2 servo valves through control logic, can switch on line, guarantee that one of them servo valve has a problem, can not appear shutting down.

Third, the utility model discloses increased the isolation solenoid valve, under extreme condition, if two servovalves all have been bad, can protect the position.

Fourth, the utility model discloses increased manual function, can change servo valve, filter on line, keep apart the solenoid valve.

Fifthly, the utility model discloses increased the OPC function, can realize letting the servomotor close control fast.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the top view structure of the present invention;

FIG. 3 is a schematic side view of the present invention;

FIG. 4 is a schematic side view of the present invention;

FIG. 5 is a schematic side view of the present invention;

FIG. 6 is a schematic side view of the present invention;

FIG. 7 is a schematic view of the hydraulic principle of the present invention;

FIG. 8 is a schematic diagram of the redundant wiring of the present invention;

fig. 9 is a diagram illustrating a servo failure command of the present invention.

Wherein: 1. a servo valve; 2. a first inner hexagonal socket head cap screw; 4. an unloading valve; 5. a second hexagon socket head cap head screw; 6. a first inner hexagonal plug screw; 10. a pressure measuring joint; 11. a filter element; 15. an adjustable throttle valve; 16. a first electromagnetic valve; 17. a third inner hexagonal socket head cap screw; 18. a second inner hexagonal plug; 19. a first pipe joint; 20. a second electromagnetic valve; 22. a third inner hexagonal plug screw; 23. a pipe joint II; 24. a housing; 25. a fourth inner hexagonal socket head cap screw; 26. a support; 27. a junction box; 40. a lifting eye screw; 41. an orifice.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Please refer to FIGS. 1-9

Example one

This embodiment is a specific implementation of a dual redundant servo valve block

A dual-redundancy servo valve block comprises a support 26, a shell 24 is arranged at the top of the support 26, two servo valves 1 are arranged at the top of the shell 24, an unloading valve 4 is further arranged at the top of the two shells 24, a first hexagon socket screw plug 6 is mounted outside the unloading valve 4, a pressure measuring joint 10 is arranged at the top of the shell 24, two filter elements 11 are arranged on the outer side wall of the shell 24, eight adjustable throttle valves 15 are arranged on the outer side wall of the shell 24, a first solenoid valve 16 is arranged at the top of the shell 24, the outer side of the first solenoid valve 16 is provided with seven second hexagon socket screw plugs 18 on the outer side wall of the shell 24, three first pipe joints 19 are arranged on the outer side wall of the shell 24, two second solenoid valves 20 are arranged on the outer side wall of the shell 24, eleven third hexagon socket screw plugs 22 are arranged on the outer side wall of the shell 24, two second pipe joints 23 are arranged on the outer side wall of the shell 24, two lifting ring screws 40 are arranged at the top of the shell 24, throttling holes 41 are formed in the outer side wall of the shell 24, and a junction box 27 is fixedly connected to the outer side wall of the support 26.

Specifically, the positions, close to four corners, of the top of the unloading valve 4 are provided with two hexagon socket head cap screws 5, and the unloading valve 4 is fixedly connected with the shell 24 through the two hexagon socket head cap screws 5.

Specifically, two servo valves 1 are symmetrically arranged at the top of the shell 24, four inner hexagonal socket head cap screws 2 are arranged on the outer side walls of the two servo valves 1, and the two servo valves 1 are fixedly connected with the shell 24 through the inner hexagonal socket head cap screws 2.

Specifically, the first electromagnetic valve 16 is arranged between the two servo valves 1, four hexagon socket head cap screws three 17 are arranged on the outer side wall of the first electromagnetic valve 16, and the first electromagnetic valve 16 is fixedly connected with the casing 24 through the hexagon socket head cap screws three 17.

Specifically, a fourth hexagon socket head cap screw 25 is arranged between the bracket 26 and the housing 24, and the bracket 26 and the housing 24 are fixedly connected through the fourth hexagon socket head cap screw 25.

Specifically, two lifting bolts 40 are diagonally arranged on the top of the housing 24, and the pressure measuring connector 10 is diagonally arranged with the two lifting bolts 40.

Specifically, the device adopts independent double-channel hydraulic control, and the two servo valves 1 respectively correspond to the two control channels.

Specifically, two filter elements 11 are respectively disposed on two side surfaces of the outer side wall of the housing 24, which are deviated from each other, and the two filter elements 11 are respectively disposed corresponding to the two servo valves 1.

Example two

The embodiment is a specific implementation mode of a hydraulic principle of a dual-redundancy servo valve block

As shown in fig. 7

According to the hydraulic principle of the dual-redundancy servo valve block, high-pressure oil enters from a port P of the servo valve block and is divided into two paths, the pressure is 14MPA, the first path passes through an adjustable throttle valve 1, enters a servo valve 1, passes through a port A, then passes through a port A of an isolation solenoid valve 1 with a serial number 20, and enters an upper cavity of an oil cylinder.

The second path of the first path passes through the adjustable throttle valve 2, enters the servo valve 2 and passes through the port A, then the oil is merged with the first path through an A port of the isolation electromagnetic valve 2 and enters an upper cavity of the oil cylinder.

Meanwhile, the port B of the servo valve is communicated with the port B of the isolation electromagnetic valve and a lower cavity of the oil engine.

If find wherein there is valve of a way to have the problem, the system can automatic switch to another way, can report an emergency and ask for help or increased vigilance in the system simultaneously, only need artificially close 4 adjustable choke valves that have a problem all the way, just can change the solenoid valve on line, and the servovalve can not influence the unit and shut down.

If the servo valves 1 and 2 have problems, the isolation electromagnetic valve can be electrified to prevent the servomotor from being closed, so that the position protection effect can be achieved, and operators can replace the servo valves according to conditions. The safety of the unit is ensured.

The valve adjusting oil cylinder is controlled by independent double-channel hydraulic pressure. Each channel is provided with an electro-hydraulic servo valve, an electromagnetic directional valve and a manual isolating valve, and a high-pressure precise filter element (5 mu m) is arranged on an oil inlet passage of the servo valve. The two hydraulic control channels are mutually independent and do not interfere with each other, an electro-hydraulic servo valve of each hydraulic control channel is controlled by an independent servo card, two LVDT stroke feedbacks are respectively connected to the redundant servo modules, the redundant servo cards are connected by a special redundant line, the two LVDT stroke feedbacks are mutually hot standby to work, and the switching time of the servo cards is less than or equal to 10ms.

When the configuration logic of the controller judges that the SO output instruction and the DDV valve core feedback deviation is large, the system automatically judges and gives a closing instruction of a locking valve of the servo valve, simultaneously cuts off a corresponding servo card output instruction, cuts off an oil way through the action of an isolation electromagnetic valve, isolates an abnormal servo valve, and isolates each oil way of the abnormal electro-hydraulic servo valve through four manual stop valves to realize the mechanical isolation of the electro-hydraulic servo valve. Therefore, the abnormal electro-hydraulic servo valve can be maintained and replaced, and operations such as filter element replacement and the like can be carried out.

When the abnormal electro-hydraulic servo valve is maintained normally, the four manual stop valves are opened to remove the mechanical isolation, so that the electro-hydraulic servo valve is in a hot state.

EXAMPLE III

As shown in fig. 7-9

This embodiment is a specific implementation of the reconstruction logic of a dual redundant servo valve block

A retrofit logic for a dual redundant servo valve block comprising the sub-items:

1. the control logic of the newly added isolation solenoid valve is as follows:

a. the electromagnetic valve is manually operated to act or reset;

b. when the current electromagnetic valve corresponds to the servo card as a main card in the running state of the small machine, the servo card control is carried out;

when the loop fault or the deviation between the valve adjusting instruction and the feedback is more than 5%, the electromagnetic valve is electrified to act;

c. and the isolation solenoid valve can not act within three seconds when the current servo card is switched from the standby card to the main card.

2. The master-slave switching condition of the servo card is as follows:

a. main card DP communication failure (automatic switching inside the servo card);

b. a main card servo channel failure (automatic switching inside the servo card);

c. the two hydraulic motors of the main card have a fault in stroke feedback (automatic switching inside the servo card);

d. the command and feedback deviation of the servomotor is more than 5 percent, and the servomotor is switched to a standby card (newly added logic);

e. and a manual main/standby switching button (newly added logic).

3. Two electromagnetic valve control buttons are added on the main picture, and a secondary confirmation function is provided.

4. The main picture is added with the position feedback display of the valve cores of the two servo valves.

5. The valve setting picture increases the state display of the master and slave servo cards and the setting function of the master and slave servo cards.

6. A master-slave servo card manual switching button is added to a valve setting picture, and a secondary confirmation function is achieved.

7. And the valve setting picture is added with the stroke feedback analog quantity display and the state display of the servo servomotor.

And (3) test verification: after the setting of the servomotor is completed, the servomotor is normally started, and then the following test is performed.

Hand test

And the manual operation picture cuts off the solenoid valve button until the solenoid valve acts normally.

And manually operating a master-slave switching button of the servo card, and normally switching the master and slave of the servo card.

Automatic switching test

The main card is powered off, the standby card is lifted, and the disturbance of the servomotor is less than 1%.

The DP communication of the main card is interrupted, the standby card is lifted, and the disturbance of the servomotor is less than 1 percent.

The main card effectively feeds back disconnection of the LVDT, feeds back switching of the LVDT, disturbance of the servomotor is less than 1%, and the main card and the standby card are not switched.

And when the valve position feedback and the command deviation are larger than 5%, the main card hydraulically cuts off the electromagnetic valve to be locked, the standby card lifts the main and controls the servomotor to return to the command position. Note that this switch requires a decision command and feedback > 5%, so it is a nuisance switch.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. 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 present invention.

Claims (8)

1. A dual redundant servo valve block comprising a bracket (26), characterized in that: the top of support (26) is provided with casing (24), the top of casing (24) is provided with two servo valve (1), two the top of casing (24) still is provided with unloading valve (4), the externally mounted of unloading valve (4) has hexagon socket head cap screw (6), the top of casing (24) is provided with pressure measurement joint (10), be provided with two filter core (11) on the lateral wall of casing (24), be provided with eight adjustable choke valve (15) on the lateral wall of casing (24), the top of casing (24) is provided with solenoid valve (16), be provided with seven hexagon socket head cap screw (18) on the lateral wall of casing (24), be provided with three pipe joint (19) on the lateral wall of casing (24), be provided with two solenoid valve (20) on the lateral wall of casing (24), be provided with eleven hexagon socket head cap screw (22) on the lateral wall of casing (24), be provided with two pipe joint (23) on the lateral wall of casing (24), the top of casing (24) is provided with two rings (40), the orifice screw (41) has been seted up on the lateral wall of casing (24), be connected with on the fixed connection of support (27) the lateral wall.

2. A dual redundant servo valve block of claim 1, wherein: the positions, close to four corners, of the top of the unloading valve (4) are provided with second hexagon socket head cap screws (5), and the unloading valve (4) is fixedly connected with the shell (24) through the second hexagon socket head cap screws (5).

3. A dual redundant servo valve block according to claim 1, wherein: the two servo valves (1) are symmetrically arranged at the top of the shell (24), four inner hexagonal socket head cap screws (2) are arranged on the outer side wall of each servo valve (1), and the two servo valves (1) are fixedly connected with the shell (24) through the inner hexagonal socket head cap screws (2).

4. A dual redundant servo valve block of claim 1, wherein: the first electromagnetic valve (16) is arranged between the two servo valves (1), four inner hexagonal socket head cap screws III (17) are arranged on the outer side wall of the first electromagnetic valve (16), and the first electromagnetic valve (16) and the shell (24) are fixedly connected through the inner hexagonal socket head cap screws III (17).

5. A dual redundant servo valve block of claim 1, wherein: and a fourth inner hexagonal socket head cap screw (25) is arranged between the support (26) and the shell (24), and the support (26) and the shell (24) are fixedly connected through the fourth inner hexagonal socket head cap screw (25).

6. A dual redundant servo valve block of claim 1, wherein: the two lifting ring screws (40) are diagonally arranged at the top of the shell (24), and the pressure measuring connector (10) and the two lifting ring screws (40) are diagonally arranged.

7. A dual redundant servo valve block of claim 1, wherein: the device adopts independent double-channel hydraulic control, and the two servo valves (1) respectively correspond to the two control channels.

8. A dual redundant servo valve block according to claim 1, wherein: the two filter cores (11) are respectively arranged on two side faces deviated from each other on the outer side wall of the shell (24), and the two filter cores (11) are respectively arranged corresponding to the two servo valves (1).

Images