CN101139009A - Steering gear mechanical electro-hydraulic servo regulator - Google Patents

Abstract

The steering gear mechanical electro-hydraulic servo regulator includes a housing 3 with a cavity 2, a spool 5 connected to a torque motor 4 is provided in the cavity 2, and a valve core 5 that runs through the upper end surface and the lower end surface is provided in the spool 5. The valve core oil passage 6, the valve core 5 is covered with a valve sleeve 8, the oil port opening and closing device 7 on the valve sleeve 8 communicates with the oil inlet 9 arranged next to the torque motor 4, and the valve sleeve 8 passes through the servo piston displacement feedback device 23 is connected with the servo cylinder 11 in the cavity 2, the oil port opening and closing device 7 communicates with the chamber 14 of the servo cylinder 11 through the oil passage 13, and the oil tank 38 arranged outside the housing 3 is connected with the chamber 15 through the oil passage 2 respectively. Chamber two 16 communicates with the opening and closing device 7 of the oil port. The design is reasonable, the service life is long, and it is easy to popularize; the structure is simple, the manufacturing cost is low, the commutation impact is easy to control, and the precision is high; the structure has high strength, is not easily damaged, and is easy to install.

Description

Steering gear mechanical electro-hydraulic servo regulator

technical field

The invention relates to an electro-hydraulic servo regulator, in particular to a structural improvement of the mechanical electro-hydraulic servo regulator for steering gear.

Background technique

As a pump control unit, the mechanical feedback electro-hydraulic servo regulator of ship steering gear is a typical electro-hydraulic integrated high-tech product. It mainly controls the swash plate and rotor inclination angle of the axial piston pump to change the displacement of the pump.

The control system of the domestic axial piston pump mostly has a built-in proportional valve as the pilot valve in the axial piston pump, and an inductive displacement sensor used to measure the inclination angle and the position of the valve core to monitor the eccentricity of the pump for displacement control ( The displacement of the pump is adjusted through the proportional valve and the control circuit), so as to control the stroke of the piston to determine the position of the swash plate. The spool will be in the neutral position. When the controller starts to work, for example, to increase the swash plate angle, the control spool will move from its neutral position until the swash plate angle increases to the desired angle. Its structure is complicated, the manufacturing cost is high, and the reversing impact is not easy to control, and the accuracy is not very high.

People have carried out long-term exploration for this reason, have proposed various improvement schemes. For example, Chinese patent literature discloses an internally controlled electro-hydraulic proportional variable axial piston pump (200320123474.2), an internally controlled electro-hydraulic proportional variable axial piston pump used in hydraulic transmission, consisting of a main body and a variable part , the transmission shaft on the main body is driven by the motor, the cylinder assembly is driven by the spline of the transmission shaft to rotate, and the multiple plungers distributed on the cylinder rotate around the transmission center, the sliding shoe is locked on the plunger ball head, and the center The spring presses the sliding shoe against the thrust plate at a certain angle to the axis through the inner sleeve, steel ball and return plate. The thrust plate is floatingly installed on the variable head, which is connected with the variable piston. At the lower end of the variable part A pressure reducing valve is installed, the inlet of the pressure reducing valve communicates with the oil outlet on the main body, and the oil return port of the pressure reducing valve communicates with the oil inlet on the main body. Use the current change of the proportional electromagnet on the variable part to control the movement of the pilot valve so that the oil in the pressure reducing valve enters the upper and lower chambers of the variable piston, so that the variable piston moves up and down to control the movement of the variable head to realize the pump variable, which is different from the current external control Compared with the oil pump to control the variable, it has the advantages of saving energy and reducing costs. This solution still uses a built-in proportional valve as the pilot valve, and the above-mentioned defects have not fundamentally changed.

Contents of the invention

The present invention mainly solves the technical problems existing in the prior art, such as complex structure, high manufacturing cost, difficult control of reversing impact, and low accuracy; it provides a simple structure, low manufacturing cost, and reversing impact Easy-to-control, high-precision electro-hydraulic servo regulator for steering gear.

Above-mentioned technical problem of the present invention is mainly solved by following technical scheme:

The mechanical electro-hydraulic servo regulator of the steering gear is connected to the oil tank of the steering gear of the ship. It is characterized in that it includes a shell with a cavity. The spool, the spool is provided with a spool oil channel that runs through the upper end surface and the lower end surface, and the spool periphery is covered with a valve sleeve that can do lateral reciprocating movement and is equipped with an oil port opening and closing device. The oil port opening and closing device communicates with the oil inlet arranged beside the torque motor, the valve sleeve is connected with the servo piston of the servo cylinder in the lower part of the cavity through the servo piston displacement feedback device, and the oil port opening and closing device passes through Oil passage one communicates with chamber one of the servo oil cylinder, and the oil tank arranged outside the housing communicates with chamber two and the oil port opening and closing device respectively through oil passage two.

In the above mechanical electro-hydraulic servo regulator for steering gear, the oil port opening and closing device is at least two oil ports on the upper part of the valve sleeve arranged in parallel on the upper end surface of the valve sleeve, and the corresponding oil ports are arranged on the lower end surface of the valve sleeve in parallel. The lower oil port of the valve sleeve, the above oil inlet and the upper oil port of the valve sleeve are provided with an oil inlet passage through the housing, and the oil inlet is sealed by the oil inlet flange.

In the above mechanical electro-hydraulic servo regulator for steering gear, the servo piston displacement feedback device includes a feedback rod whose one end is fixedly connected to the valve sleeve through a bolt, and the other end of the feedback rod is provided with a slide that can move vertically up and down. block, and the slider is arranged in the slider annular groove of the servo piston.

In the above-mentioned steering gear mechanical electro-hydraulic servo regulator, the front end of the spool 5 is provided with a spool displacement feedback device, and the spool displacement feedback device includes a displacement sensor fixed on the outside of the housing by a fixing bolt, so One end of the displacement sensor is connected to the front end of the spool, and the other end is connected to the ship steering gear control mechanism.

In the above mechanical electro-hydraulic servo regulator for steering gear, the tail end of the valve core is provided with a buffer spring, the inner wall of the cavity is provided with a buffer valve seat corresponding to the buffer spring, and the outer periphery of the buffer valve seat is provided with a The buffer spring corresponds to the buffer spring.

In the above mechanical electro-hydraulic servo regulator for steering gear, the outer periphery of the valve sleeve is also provided with a casing bushing, and the outer periphery of the casing bushing is provided with the upper oil port of the valve sleeve and the lower oil port of the valve sleeve. Corresponding bushing upper transition oil port and bushing lower transition oil port.

In the above-mentioned mechanical electro-hydraulic servo regulator for steering gear, the torque motor is fixed on the casing by fixing bolts, and the torque shaft on the torque motor 4 passes through the motor shaft hole provided with an oil seal and is connected with the valve core.

Therefore, the present invention has the following advantages: 1. Reasonable design, long service life, easy to popularize; 2. Simple structure, low manufacturing cost, and easy control of reversing impact, high precision; 3. High structural strength, not easy to damage, and Easy to install.

Description of drawings

Fig. 1 is a kind of sectional structure schematic diagram of the present invention;

Fig. 2 is a schematic diagram of an enlarged structure at A in Fig. 1;

Fig. 3 is a schematic diagram of the enlarged structure of the oil circuit at A in Fig. 1;

In the figure, cavity 2, housing 3, torque motor 4, spool 5, spool oil passage 6, oil port opening and closing device 7, valve sleeve 8, oil inlet 9, spool displacement feedback device 10, servo cylinder 11. Servo piston 12, oil passage 1 13, chamber 1 14, oil passage 2 15, chamber 2 16, valve sleeve upper oil port 17, valve sleeve upper oil port 1 171, valve sleeve upper oil port 2 172, valve Oil port three on the upper part of the sleeve 173, oil port on the lower part of the valve sleeve 18, oil port one on the lower part of the valve sleeve 181, oil port two on the lower part of the valve sleeve 182, oil port three on the lower part of the valve sleeve 183, oil inlet passage 19, bolt 20, slider 21, Slider groove 22, servo piston displacement feedback device 23, displacement sensor 25, buffer spring 27, buffer valve seat 28, torque shaft 29, housing bushing 30, oil seal 31, motor shaft hole 32, oil inlet flange 33, Bushing upper transition port 34, bushing upper transition port 1 341, bushing upper transition port 2 342, bushing upper transition port 3 343, bushing lower transition port 35, bushing lower transition port 1 351, the second transition oil port of the bushing lower part 352, the third transition oil port of the bushing lower part 353, the feedback lever 39, the fixing bolt 40.

Detailed ways

The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Example:

As shown in Figure 1, Figure 2 and Figure 3, the electro-hydraulic servo regulator of the steering gear is connected to the ship steering gear control mechanism, and it includes a housing 3 with a cavity 2, and the upper part of the cavity 2 is provided with a The spool 5 connected to the torque motor 4 on the upper end surface of the housing 3, the torque shaft 29 of the torque motor 4 is connected to the spool 5 through the motor shaft hole 32 provided with an oil seal, and the spool 5 is provided with a The valve core oil channel 6 on the end face, the end of the valve core 5 is provided with a buffer spring 27, and the inner wall of the cavity 2 is provided with a buffer valve seat 28 corresponding to the buffer spring 27.

The outer periphery of the valve core 5 is covered with a valve sleeve 8 capable of lateral reciprocating movement. The outer periphery of the valve sleeve 8 is also sleeved with a casing bushing 30. The lower oil port 18 corresponds to the upper transition oil port 34 of the bushing and the lower transition oil port 35 of the bushing. Bottom oil port 1 181, valve sleeve lower port 2 182, valve sleeve lower port 3 183, bushing upper transition port 1 341, bushing upper transition port 2 342, bushing upper transition port 3 343, The first transition oil port 351 at the lower part of the bushing, the second transition oil port 352 at the lower part of the bushing, and the third transitional oil port 353 at the lower part of the bushing. The upper end surface of the valve sleeve 8 is arranged in parallel with three upper oil ports 17 of the valve sleeve, and the corresponding lower oil port 18 of the valve sleeve is arranged parallelly on the lower end surface of the valve sleeve 8, and the oil inlet 9 arranged next to the torque motor 4 and the valve An oil inlet passage 19 penetrating through the casing 3 is provided between the upper oil ports 17 , and the oil inlet 9 is sealed by an oil inlet flange 33 .

This solution includes a servo piston displacement feedback device 23, that is, the valve sleeve 8 is fixedly connected to one end of the feedback rod 39 through a bolt 20, and the other end of the feedback rod 39 is provided with a slider 21 that can move vertically up and down, and the slider 21 is arranged on In the slider groove 22 of the servo piston 12 of the servo oil cylinder 11 , the servo oil cylinder 11 is arranged at the bottom of the cavity 2 .

This solution also includes a spool displacement feedback device 10, which includes a displacement sensor 25 fixed on the outside of the housing 3 by a fixing bolt 40. One end of the displacement sensor 25 is connected to the front end of the spool 5, and the other end is connected to the ship steering gear control mechanism.

The entire sleeve installation process of the casing bush 30 in this embodiment is as follows. First, the entire casing casing 30 is cooled to minus 20 degrees, and the size of the entire casing casing 30 is reduced, and then it is inserted into the valve body, and the casing operation After completion, an interference fit is produced with the outer shell 3. The shell bushing 30 here is made of bearing steel. After the bearing steel is used, the long-term reciprocating motion of the valve sleeve 8 and the friction of the shell bushing 30 will not cause The valve sleeve 8 and the casing in the prior art are corroded due to long-term friction and are not wear-resistant.

The servo cylinder 11 of the present embodiment is a differential cylinder. The ship steering gear control mechanism includes a console connected to the control box. The transmission is connected to the swash plate. The relevant devices in the ship steering gear control mechanism of this embodiment and the relevant principles of the transmission device connected with the servo piston 12 swash plates are all prior art, and the relevant technologies can refer to "Ship Power Device" People's Communications Publishing House, ISBN: 7114038739, 2001 July 1st edition 1st printing.

When working, in the initial state, the spool is in the neutral position, and the servo piston 12 has no action. When the command signal is given by the console, the signal is converted into corresponding control force by the controller, and the torque motor 4 drives the valve core 5 to move (to the left). Oil port one 171 on the upper part of the valve sleeve and oil port 181 on the lower part of the valve sleeve enter chamber two 16 in the servo piston 12 through oil passage 15, while chamber one 14 passes through oil passage one 13 and passes through oil port two 182 on the lower part of the valve sleeve and valve The oil port 3 183 at the lower part of the sleeve returns to the fuel tank, at this time the servo piston 12 moves to the left correspondingly, and the valve sleeve 8 is driven to move to the left through the feedback rod 39, and when the oil passage 1 13 is closed, the valve sleeve and the valve core reach a new zero position , the servo piston 12 outputs the corresponding displacement and manipulates the swashplate through the transmission device, so that the actuator performs the corresponding action to achieve the purpose of steering. Transition oil port one 341 reaches chamber one 14 through oil passage one 13, and at the same time, the servo pump oil passes through transition oil port two 324 on the upper part of the bushing and reaches chamber two 14 through oil passage 13. At this time, the servo piston forms a differential cylinder to the right It moves to drive the valve sleeve to move to the right. After reaching the new zero position, the oil passage 13 is closed, so that the servo piston 12 moves to the right. The corresponding displacement of the servo piston 12 is controlled by the transmission device to reverse the swash plate, so that the actuator Perform the corresponding reverse action.

In operation, the servo piston displacement feedback device 23 is the feedback rod 39 connected to the valve sleeve 8 and the servo piston 12 respectively. One end of the feedback rod 39 is connected to the valve sleeve 20 through a bolt 21, and the other end is provided with a slider 21. The slider 21 It can slide vertically up and down in the slider groove 22 of the servo piston 12. The movement of the servo piston 12 leads to the movement of the feedback rod 39. The function of the slider 21 is to make the feedback rod 39 have a certain buffer time and make the valve sleeve 8 to reflect the movement of the servo piston 12 in time, so that the valve core 5 and the valve sleeve 8 reach a new zero position, that is, the time for closing the oil port meets the requirements of the console.

When the system is working, it also includes a feedback device, that is, the spool displacement feedback device 10. When the spool 5 is displaced, the displacement sensor 25 connected to the spool 5 compares and amplifies the electrical signal and feeds it back to the control box. The control box then Control the torque motor 4 to manipulate the spool 5 to reach the correct displacement according to the offset of the signal.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Although this article uses a lot of cavity 2, shell 3, torque motor 4, valve core 5, valve core oil passage 6, oil port opening and closing device 7, valve sleeve 8, oil inlet 9, valve core displacement feedback device 10. Servo cylinder 11, servo piston 12, oil passage 1 13, chamber 1 14, oil passage 2 15, chamber 2 16, valve sleeve upper oil port 17, valve sleeve upper oil port 1 171, valve sleeve upper oil port Two 172, valve sleeve upper oil port three 173, valve sleeve lower oil port 18, valve sleeve lower oil port one 181, valve sleeve lower oil port two 182, valve sleeve lower oil port three 183, oil inlet passage 19, bolts 20, Slider 21, slider groove 22, servo piston displacement feedback device 23, displacement sensor 25, buffer spring 27, buffer valve seat 28, torque shaft 29, housing bushing 30, oil seal 31, motor shaft hole 32, oil inlet Flange 33, bushing upper transition port 34, bushing upper transition port 1 341, bushing upper transition port 2 342, bushing upper transition port 3 343, bushing lower transition port 35, bushing lower Transition oil port 1 351, bush lower transition oil port 2 352, bush lower transition oil port 3 353, feedback lever 39, fixing bolt 40, and other terms, but the possibility of using other terms is not excluded. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.

Claims (7)

1. steering engine mechanical electro-hydraulic servo-operated regulator, be connected on the fuel tank of ship steering engine control mechanism, it is characterized in that, it comprises the have cavity housing (3) of (2), described cavity (2) internal upper part is provided with the spool (5) that links to each other with the torque motor (4) that is arranged on housing (3) upper surface, described spool (5) is provided with the spool oil duct (6) through upper surface and lower surface, this spool (5) periphery is with the valve pocket (8) that can do traverse motion and be provided with hydraulic fluid port closing device (7), described hydraulic fluid port closing device (7) oil inlet (9) other with being arranged on torque motor (4) communicates, described valve pocket (8) links to each other with the servo piston (12) of the servo-cylinder (11) of the interior bottom of cavity (2) by servo piston Displacement Feedback device (23), described hydraulic fluid port closing device (7) communicates with the chamber one (14) of servo-cylinder (11) by oil duct one (13), is arranged on the outer fuel tank (38) of housing (3) and communicates with chamber two (16) and hydraulic fluid port closing device (7) respectively through oil duct two (15).

2. steering engine mechanical electro-hydraulic servo-operated regulator according to claim 1, it is characterized in that, described hydraulic fluid port closing device (7) is for being set in parallel at least two valve pocket top hydraulic fluid ports (17) of valve pocket (8) upper surface, and the valve pocket cooresponding bottom hydraulic fluid port (18) that is set in parallel in valve pocket (8) lower surface with it, be provided with the oil input channel (19) that runs through with housing (3) between above-mentioned oil inlet (9) and the valve pocket top hydraulic fluid port (17), described oil inlet (9) is sealed by oil-feed flange (33).

3. steering engine mechanical electro-hydraulic servo-operated regulator according to claim 1, it is characterized in that, described servo piston Displacement Feedback device (23) comprises the feedback rod (39) that an end and valve pocket (8) are connected by bolt (20), described feedback rod (39) other end is arranged with the slide block (21) that can do perpendicular movement up and down, and described slide block (21) is arranged in the slide block circular trough (22) of servo piston (12).

4. steering engine mechanical electro-hydraulic servo-operated regulator according to claim 1, it is characterized in that, the front end of described spool (5) is provided with a spool displacement positioner (10), described spool displacement positioner (10) comprises the displacement pickup (25) that is fixed on housing (3) outside by bolt of rear end plate (40), described displacement pickup (25) one ends link to each other with spool (5) front end, and the other end is through linking to each other with the ship steering engine control mechanism.

5. steering engine mechanical electro-hydraulic servo-operated regulator according to claim 1, it is characterized in that, described spool (5) tail end is provided with recoil spring (27), cavity (2) inwall is provided with and the corresponding buffering valve seat of recoil spring (27) (28), and described buffering valve seat (28) outer race is provided with and the corresponding recoil spring of recoil spring (27) (29).

6. steering engine mechanical electro-hydraulic servo-operated regulator according to claim 1 and 2, it is characterized in that, described valve pocket (8) periphery also is arranged with case bushing (30), and described case bushing (30) periphery is provided with and above-mentioned valve pocket top hydraulic fluid port (17) and valve pocket bottom hydraulic fluid port (18) corresponding lining top transition hydraulic fluid port (34) and lining bottom transition hydraulic fluid port (35).

7. steering engine mechanical electro-hydraulic servo-operated regulator according to claim 1, it is characterized in that, described torque motor (4) is fixed on the housing (3) by bolt of rear end plate (40), and the axis of torque (29) on the torque motor (4) passes the motor axis hole (32) that is provided with oil sealing (31) and links to each other with spool (5).

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