CN118221019A - Motor low-rotation-speed unstable inhibition valve - Google Patents

Abstract

The present invention relates to a motor low rotation speed unstable suppression valve. The motor greatly improves the technical problem of unstable operation of the existing motor at low speed. The system hydraulic pipeline of the motor is provided with a system hydraulic pipeline which comprises a suppression valve assembly, the suppression valve assembly comprises a valve shell with a movable cavity, a suppression valve core is axially movably arranged in the movable cavity, one end of the suppression valve core is provided with a first oil port, the outer side of the valve shell is provided with a second oil port, one end of the suppression valve core is provided with an elastic pressing structure, the outer side of the suppression valve core is provided with a plurality of oil hole groups, the outer side of the suppression valve core is sleeved with a valve sleeve which is movably connected with the suppression valve core and can seal the oil hole groups, and the inner side and/or the outer side of the suppression valve core is provided with a throttling assembly. The advantages are that: when the motor enters a low speed, the inhibition valve component can actively isolate the motor from the system hydraulic pipeline, so that the large-volume participation of the system hydraulic pipeline in the low-speed unstable process of the motor is avoided, and meanwhile, when the motor is in a non-low speed section, the inhibition valve core is completely opened, and the high-speed large choke tube resistance loss of the motor is prevented.

Description

Motor low-rotation-speed unstable inhibition valve

Technical Field

The invention belongs to the technical field of cranes and hoisting, and particularly relates to a motor low-rotation-speed unstable inhibition valve.

Background

Because the low-speed hoisting requirement leads to a hoisting drum of only 1-2r/min, after the speed reduction ratio of a speed reducer is amplified, the motor works usually only 50-100r/min, when the motor is smaller than 100r/min, the rotating speed of the motor under high pressure is unstable, even creeping and creeping can occur, the hoisting control accuracy performance requirement and safety are seriously influenced, and the reason for generating the unstable rotating speed is as follows: the plunger of the motor is 7 or 9, the output torque has fluctuation, and the fluctuation can be excited with the rigidity of a cable and the volume of a pipeline, so that the rotating speed of the motor is unstable.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a motor low rotation speed unstable suppressing valve.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a motor low-rotation-speed unstable choke valve, sets up on the system hydraulic pressure pipeline of motor, including choke valve subassembly, choke valve subassembly including the valve casing that has the activity cavity, the activity cavity in the axial activity be equipped with and be hollow choke valve core, choke valve core one end have with the first hydraulic fluid port that the high-pressure oil import is linked together and the valve casing outside have the second hydraulic fluid port that links to each other with the motor, choke valve core keep away from the one end that has first hydraulic fluid port and be equipped with elasticity roof pressure structure, be equipped with a plurality of oilhole groups that are linked together with the second hydraulic fluid port in the choke valve core outside and be equipped with the valve barrel that links to each other and can seal oilhole group outside the choke valve core activity, just choke valve core inboard and/or outside be equipped with the choke valve subassembly. When the motor enters a low speed, the inhibition valve assembly can actively isolate the motor from the system hydraulic pipeline, so that the large volume of the system hydraulic pipeline is prevented from participating in the low speed unstable process of the motor.

In the low-rotation-speed unstable suppression valve for the motor, the motor is connected with a hoisting drum suspended with a weight through a speed reducer, one end, far away from the motor, of the suppression valve assembly is provided with a balance valve connected with a first oil port, the balance valve is connected with a main pump, and a safety valve is connected between the balance valve and the main pump.

In the above-mentioned low-rotation-speed unstable suppression valve for motor, a motor inlet V1 is formed between the suppression valve assembly and the motor, a hydraulic volume V2 is formed between the balance valve and the main pump, and when the motor is at a low speed, the hydraulic volume V2 and the motor inlet V1 are isolated by the throttle assembly. Due to the instability of the motor at low speeds, the hoisting cable stiffness of the system, the hydraulic volume V2, is the low speed unstable excited unit, with the hydraulic volume V2 being the most dominant contributor, and neither the hydraulic volume V2 nor the cable being changeable due to system limitations.

In the motor low-rotation-speed unstable suppression valve, the throttle assembly is divided into a first throttle assembly arranged on the inner side of the suppression valve core and a second throttle assembly arranged on the outer side of the suppression valve core and positioned on one side of the first throttle assembly away from the first oil port.

In the above-mentioned motor low-rotation-speed unstable inhibition valve, the first throttling assembly comprises a throttling gasket arranged on the circumferential inner side of the inhibition valve core, the center of the throttling gasket is provided with a first throttling hole corresponding to the first oil port, a check ring is arranged on the circumferential inner side of the inhibition valve core and on one side of the throttling gasket away from the first oil port, and the circumferential outer side of the throttling gasket is clamped in a positioning groove on the circumferential inner side of the inhibition valve core and is mutually abutted against one side of the check ring.

In the low-rotation-speed unstable suppression valve for the motor, the second throttling assembly comprises a second throttling hole and a second throttling orifice, wherein the second throttling hole and the second throttling orifice are arranged on the outer side of the circumference of the suppression valve core and are communicated with the inner part of the suppression valve core, the second throttling hole and the second throttling orifice are respectively positioned on one side of the throttling gasket, which is far away from the first oil port, the second throttling hole corresponds to the inner wall of the valve shell, and the second throttling orifice corresponds to the second oil port.

In the above-mentioned motor low-rotation-speed unstable suppression valve, the oil hole group is divided into two groups and is arranged on one side of the throttle gasket close to the first oil hole, each group of oil hole group comprises a plurality of distributed oil holes circumferentially arranged on the outer side of the suppression valve core and communicated with the inner part of the suppression valve core, and the aperture of the distributed oil hole of the oil hole group close to the throttle gasket in the two groups of oil hole groups is larger than that of the distributed oil hole of the other group of oil hole groups. When the flow of the motor inlet V1 rises, the throttle pressure difference generated by the first throttle hole enables the suppression valve core to move leftwards, so that the distribution oil port is positioned at a smaller opening degree, stepless transition between a small flow section and a medium and small flow section is realized, and the phenomenon that the motor efficiency is low due to overlarge throttle effect is avoided.

In the motor low-rotation-speed unstable inhibition valve, the valve sleeve body is movably arranged in the valve shell and positioned at one side of the second oil port, the valve sleeve body is movably sleeved on the outer side of the inhibition valve core, and the inner wall of the valve sleeve body is blocked on the outer side of the distribution oil port. When the flow of the motor inlet V1 is larger, the throttling pressure difference generated by the first throttling hole forces the inhibition valve core to increase the left-shifting opening degree, so that the distribution oil port is completely opened, the minimum pipe resistance of the passing flow is realized, and the pipe resistance loss of the motor is avoided.

In the motor low-rotation-speed unstable inhibition valve, one end of the valve shell is provided with a limiting seat which is positioned at the end part of the movable cavity and is propped against the end part of the inhibition valve core, the first oil port is formed in the limiting seat, one end of the valve sleeve body is slidably arranged outside one end of the limiting seat, the other end of the limiting seat is provided with a limiting part, and a plurality of limiting orifices are arranged outside the limiting seat. The limiting orifice can control the moving speed of the valve sleeve.

In the low-rotation-speed unstable suppression valve for the motor, the elastic pressing structure comprises a spring member which is arranged at one end of the suppression valve core, which is far away from the first oil port, and is propped against the inner part of the valve shell. The spring member can ensure the movement position of the suppression spool, and can help suppress the spool from returning.

Compared with the prior art, the invention has the advantages that:

1. From the system perspective, the hydraulic pipeline volume is limited, and the interference of the hydraulic volume on the low-speed instability of the motor is reduced.

2. When the motor enters low speed, the motor and the system hydraulic pipeline can be actively isolated, so that the large-volume participation of the system hydraulic pipeline in the low-speed unstable process of the motor is avoided.

3. When the motor is in a non-low speed section, the inhibition valve core of the inhibition valve assembly is completely opened, so that the high-speed and large choke tube resistance loss of the motor is prevented.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a system schematic diagram of the present invention.

In the figure: the hydraulic control device comprises a motor 1, a speed reducer 11, a weight 12, a winding drum 13, a balance valve 14, a safety valve 15, a main pump 16, a check valve assembly 2, a valve shell 21, a movable cavity 22, a second oil port 23, a limit seat 24, a limit part 25, a limit orifice 26, a check valve core 3, a first oil port 31, an oil hole group 32, a distribution oil port 33, a valve sleeve 5, a throttle assembly 6, a first throttle assembly 61, a second throttle assembly 62, a throttle gasket 63, a first throttle orifice 64, a check ring 65, a positioning groove 66, a second throttle orifice 67, a second throttle orifice 68, an elastic pressing structure 7 and a spring member 71.

Detailed Description

The invention will be described in further detail with reference to the drawings and the detailed description.

As shown in fig. 1-2, a motor low-rotation-speed unstable suppression valve is arranged on a system hydraulic pipeline of a motor 1, and comprises a suppression valve assembly 2, wherein the suppression valve assembly 2 comprises a valve shell 21 with a movable cavity 22, a hollow suppression valve core 3 is axially movably arranged in the movable cavity 22, one end of the suppression valve core 3 is provided with a first oil port 31 communicated with a high-pressure oil inlet, the outer side of the valve shell 21 is provided with a second oil port 23 connected with the motor 1, one end of the suppression valve core 3, far away from the first oil port 31, is provided with an elastic pressing structure 7, the outer side of the suppression valve core 3 is provided with a plurality of oil hole groups 32 communicated with the second oil port 23, a valve sleeve 5 which is movably connected with the suppression valve core 3 and can seal the oil hole groups 32 is sleeved outside the suppression valve core 3, and the inner side and/or the outer side of the suppression valve core 3 is provided with a throttling assembly 6. When the motor 1 enters the low speed, the inhibition valve assembly 2 can actively isolate the motor 1 from the system hydraulic pipeline, so that the large volume of the system hydraulic pipeline is prevented from participating in the low speed instability process of the motor 1.

As shown in fig. 2, the motor 1 is connected with a winding drum 13 suspended with a weight 12 through a speed reducer 11, one end of the inhibition valve assembly 2 away from the motor 1 is provided with a balance valve 14 connected with a first oil port 31, the balance valve 14 is connected with a main pump 16, and a safety valve 15 is connected between the balance valve 14 and the main pump 16.

Wherein a motor inlet V1 is formed between the inhibitor valve assembly 2 and the motor 1, a hydraulic volume V2 is formed between the balance valve 14 and the main pump 16, and the hydraulic volume V2 and the motor inlet V1 are isolated by the throttle assembly 6 when the motor 1 enters a low speed. Due to the instability of the motor 1 at low speeds, the hoisting cable stiffness of the system, the hydraulic volume V2, is the low speed unstable excited unit, where the hydraulic volume V2 is the most dominant influencing factor, and neither the hydraulic volume V2 nor the cable can be changed due to system limitations.

As shown in fig. 1, the throttle assembly 6 is divided into a first throttle assembly 61 provided inside the suppression spool 3 and a second throttle assembly 62 provided outside the suppression spool 3 and located on a side of the first throttle assembly 61 away from the first port 31.

The first throttling assembly 61 includes a throttling gasket 63 disposed on the inner side of the valve core 3 in the circumferential direction, a first throttling hole 64 corresponding to the first oil port 31 is disposed in the center of the throttling gasket 63, a retainer ring 65 is disposed on the inner side of the valve core 3 in the circumferential direction and on the side of the throttling gasket 63 away from the first oil port 31, and the throttling gasket 63 is clamped in a positioning groove 66 on the inner side of the valve core 3 in the circumferential direction and is abutted against the retainer ring 65.

Specifically, the second orifice assembly 62 includes a second orifice 67 and a second orifice 68 that are provided on the outer side in the circumferential direction of the suppression spool 3 and that are both in communication with the interior of the suppression spool 3, the second orifice 67 and the second orifice 68 being both located on the side of the orifice washer 63 away from the first oil port 31, the second orifice 67 corresponding to the inner wall of the valve housing 21 and the second orifice 68 corresponding to the second oil port 23.

Further, the oil hole groups 32 are divided into two groups and are all arranged on one side, close to the first oil hole 31, of the throttle gasket 63, each oil hole group 32 comprises a plurality of distributed oil holes 33 which are circumferentially arranged on the outer side of the suppression valve core 3 and are communicated with the inner part of the suppression valve core 3, and the aperture of the distributed oil holes 33 of the oil hole group 32, close to the throttle gasket 63, in the two oil hole groups 32 is larger than that of the distributed oil holes 33 of the other oil hole group 32. When the flow of the motor inlet V1 rises, the throttle pressure difference generated by the first throttle orifice 64 enables the suppression valve core 3 to move leftwards, so that the distribution oil port 33 is at a smaller opening degree, stepless transition between a small flow section and a medium and small flow section is realized, and the phenomenon that the efficiency of the motor 1 is low due to overlarge throttle effect is avoided.

Further, the valve housing body 5 is movably disposed in the valve housing 21 and located at the side of the second oil port 23, the valve housing body 5 is movably sleeved outside the inhibition valve core 3, and the inner wall of the valve housing body 5 is blocked outside the distribution oil port 33. When the flow of the motor inlet V1 is larger, the throttle pressure difference generated by the first throttle orifice 64 forces the suppression valve core 3 to increase the left-shift opening degree, so that the distribution oil port 33 is completely opened, the minimum pipe resistance of the passing flow is realized, and the pipe resistance loss of the motor 1 is avoided.

Wherein, one end of the valve housing 21 is provided with a limiting seat 24 located at the end of the movable cavity 22 and abutting against the end of the inhibition valve core 3, a first oil port 31 is formed in the limiting seat 24, one end of the valve housing 5 is slidably disposed outside one end of the limiting seat 24, the other end of the limiting seat 24 is provided with a limiting portion 25, and a plurality of limiting orifices 26 are disposed outside the limiting seat 24. The restriction orifice 26 can control the moving speed of the valve housing 5.

Meanwhile, the elastic pressing structure 7 includes a spring member 71 provided at an end of the suppression spool 3 away from the first port 31 and abutting against the inside of the valve housing 21. The spring member 71 can ensure the movement position of the suppression spool 3, and can help suppress the spool 3 from resetting.

The principle of this embodiment is:

High-pressure oil flows from the first oil port 31 to the second oil port 23 through the second orifice 67 and the second orifice 68 of the inhibition valve core 3, then enters the motor inlet V1, and is discharged out of the motor 1 after being subjected to work by the motor 1; when the motor 1 enters a low speed, the inlet flow of the motor 1 is inevitably smaller, the first throttling hole 64 and the second throttling hole 67 are not active, the valve core 3 is restrained from moving, the motor inlet V1 and the hydraulic volume V2 are isolated by the second throttling hole 68, and the hydraulic volume V2 of a hydraulic pipeline of the system cannot interfere with the low speed instability of the motor 1; when the motor 1 is in reversing, the outlet flow of the motor 1 flows to the first oil port 31 through the second oil port 23, the pressure acts on the inhibition valve core 3 at the second oil port 23, the inhibition valve core 3 moves rightwards, the valve sleeve body 5 moves rightwards under the pressure to contact the limiting part 25 of the limiting seat 24, the distribution oil port 33 of the whole inhibition valve core 3 is opened, the pipe resistance flowing through the inhibition valve assembly 2 is minimized, and the excessive pipe resistance effect is not generated on the oil flowing out of the motor 1.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although terms such as the motor 1, the speed reducer 11, the weight 12, the winding drum 13, the balance valve 14, the relief valve 15, the main pump 16, the check valve assembly 2, the valve housing 21, the movable chamber 22, the second oil port 23, the check seat 24, the check portion 25, the check orifice 26, the check valve element 3, the first oil port 31, the oil hole group 32, the distribution oil port 33, the valve housing 5, the throttle assembly 6, the first throttle assembly 61, the second throttle assembly 62, the throttle washer 63, the first throttle orifice 64, the retainer ring 65, the positioning groove 66, the second throttle orifice 67, the second throttle orifice 68, the elastic pressing structure 7, the spring member 71, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.

Claims (10)

1. The utility model provides a motor low-rotation-speed unstable inhibition valve, sets up on the system hydraulic pressure pipeline of motor (1), a serial communication port, including inhibition valve subassembly (2), inhibition valve subassembly (2) including valve casing (21) that have movable cavity (22), movable cavity (22) in axial activity be equipped with and be hollow inhibition case (3), inhibition case (3) one end have first hydraulic fluid port (31) and valve casing (21) outside that are linked together with the high-pressure oil import have second hydraulic fluid port (23) that link to each other with motor (1), inhibition case (3) keep away from the one end that has first hydraulic fluid port (31) be equipped with elasticity roof pressure structure (7), be equipped with a plurality of oilhole group (32) that are linked together with second hydraulic fluid port (23) in inhibition case (3) outside and be equipped with inhibition case (3) activity link to each other and can with oilhole group (32) confined valve body (5), and inhibition case (3) inboard and/or outside be equipped with throttle assembly (6).

2. The motor low-rotation-speed unstable suppression valve according to claim 1, characterized in that the motor (1) is connected with a hoisting drum (13) suspended with a heavy object (12) through a speed reducer (11), one end of the suppression valve assembly (2) far away from the motor (1) is provided with a balance valve (14) connected with a first oil port (31), the balance valve (14) is connected with a main pump (16), and a safety valve (15) is connected between the balance valve (14) and the main pump (16).

3. A motor low rotational speed unstable control valve according to claim 2, wherein said control valve assembly (2) and motor (1) define a motor inlet V1 therebetween, said balance valve (14) and main pump (16) define a hydraulic volume V2 therebetween, and said hydraulic volume V2 and motor inlet V1 are isolated by a throttle assembly (6) when the motor (1) is brought to a low speed.

4. A motor low rotation speed instability suppressing valve according to claim 1,2 or 3, wherein the throttle assembly (6) is divided into a first throttle assembly (61) provided inside the suppressing valve element (3) and a second throttle assembly (62) provided outside the suppressing valve element (3) and located on a side of the first throttle assembly (61) away from the first oil port (31).

5. The motor low-rotation-speed unstable suppression valve according to claim 4, wherein the first throttle assembly (61) comprises a throttle gasket (63) arranged on the circumferential inner side of the suppression valve core (3), a first throttle hole (64) corresponding to the first oil port (31) is formed in the center of the throttle gasket (63), a retainer ring (65) is arranged on the circumferential inner side of the suppression valve core (3) and on one side, far away from the first oil port (31), of the throttle gasket (63), and the circumferential outer side of the throttle gasket (63) is clamped in a positioning groove (66) on the circumferential inner side of the suppression valve core (3) and is mutually abutted against one side of the retainer ring (65).

6. The low-rotation-speed unstable control valve according to claim 5, wherein said second orifice assembly (62) includes a second orifice (67) and a second orifice (68) disposed on the outer side of the outer periphery of said control valve element (3) and communicating with the inner portion of said control valve element (3), said second orifice (67) and said second orifice (68) being disposed on the side of said orifice washer (63) away from said first port (31), said second orifice (67) corresponding to the inner wall of said valve housing (21) and said second orifice (68) corresponding to said second port (23).

7. The low-rotation-speed unstable suppression valve for a motor according to claim 5, wherein the oil hole groups (32) are divided into two groups and are arranged on one side of the throttle gasket (63) close to the first oil hole (31), each oil hole group (32) comprises a plurality of distribution oil holes (33) which are circumferentially arranged on the outer side of the suppression valve core (3) and are communicated with the inner part of the suppression valve core (3), and the aperture of the distribution oil hole (33) of the oil hole group (32) close to the throttle gasket (63) in the two oil hole groups (32) is larger than that of the distribution oil hole (33) of the other oil hole group (32).

8. The motor low-rotation-speed unstable inhibition valve according to claim 7, wherein the valve sleeve (5) is movably arranged in the valve housing (21) and positioned at one side of the second oil port (23), the valve sleeve (5) is movably sleeved outside the inhibition valve core (3), and the inner wall of the valve sleeve (5) is blocked outside the distribution oil port (33).

9. The motor low-rotation-speed unstable suppression valve according to claim 1, wherein one end of the valve housing (21) is provided with a limiting seat (24) which is positioned at the end part of the movable cavity (22) and abuts against the end part of the suppression valve core (3), the first oil port (31) is formed in the limiting seat (24), one end of the valve housing (5) is slidably arranged outside one end of the limiting seat (24), the other end of the limiting seat (24) is provided with a limiting part (25), and a plurality of limiting orifices (26) are arranged outside the limiting seat (24).

10. A motor low rotation speed unstable control valve according to claim 1, wherein said elastic pressing structure (7) includes a spring member (71) provided at an end of the control valve element (3) away from the first port (31) and abutting against the inside of the valve housing (21).