CN114810710A - Multifunctional cartridge valve for rotary motor and use method thereof - Google Patents

Multifunctional cartridge valve for rotary motor and use method thereof Download PDF

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Publication number
CN114810710A
CN114810710A CN202210472001.0A CN202210472001A CN114810710A CN 114810710 A CN114810710 A CN 114810710A CN 202210472001 A CN202210472001 A CN 202210472001A CN 114810710 A CN114810710 A CN 114810710A
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China
Prior art keywords
valve
opening
valve core
oil
spring
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CN202210472001.0A
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Inventor
王金铂
白利苗
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Qingdao Lkc Hydraulic Co ltd
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Qingdao Lkc Hydraulic Co ltd
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Priority to CN202210472001.0A priority Critical patent/CN114810710A/en
Publication of CN114810710A publication Critical patent/CN114810710A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/027—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • F15B2013/004—Cartridge valves

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The invention provides a multifunctional cartridge valve for a rotary motor and a use method thereof, wherein the cartridge valve is inserted into a base cavity of the rotary motor and comprises an overflow component and a one-way oil supplementing component; the valve core spring is arranged on the valve core structure, and under the action of the valve core spring, the valve core structure and the opening on the valve body form a taper opening seal; the rotary motor is provided with an oil inlet A, an oil inlet B and an oil supplementing opening which are mutually communicated, the opening of the valve body is communicated with the oil inlet A or the oil inlet B, the oil supplementing opening is axially penetrated through the valve body along the oil supplementing opening, when the pressure difference is formed between the oil inlet A or the oil inlet B and the oil supplementing opening, the check valve moves towards the direction of the opening far away from the valve body, and the oil supplementing opening is communicated with the overflowing hole. According to the invention, the structure of the cartridge valve of the traditional hydraulic driving device (rotary motor) is optimized, the integration of functions of the one-way oil supplementing valve and the overflow valve is realized, the valve body structure is reasonably optimized, the installation size of equipment is reduced, and the cartridge valve is suitable for a smaller installation space.

Description

Multifunctional cartridge valve for rotary motor and use method thereof
Technical Field
The invention belongs to the technical field of cartridge valves, and particularly relates to a multifunctional cartridge valve for a rotary motor and a using method of the multifunctional cartridge valve.
Background
The hydraulic driving device is used as an actuating mechanism of a hydraulic system and needs to realize rotation of equipment. At present, the excavator tends to be miniaturized more and more, so that the excavator has more and more compact structural requirements on various elements, and as a hydraulic driving device (a rotary motor), in order to meet the product requirements, the excavator needs to optimize the design structure and reduce the volume of the product;
the hydraulic driving device (rotary motor) needs to be provided with an overflow valve and a one-way oil supplementing valve, and the valve in the prior art has a relatively single function, so that the volume of the hydraulic driving device (rotary motor) is inevitably increased during installation.
Disclosure of Invention
The invention aims to provide a multifunctional cartridge valve for a rotary motor and a using method thereof, and solves the problems that the cartridge valve in the prior art is single in function and difficult to integrate multiple functions.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multifunctional cartridge valve for a rotary motor is inserted into a seat cavity of the rotary motor and comprises an overflow assembly and a one-way oil supplementing assembly;
the overflow assembly comprises a valve body, a valve core structure and a valve core spring, one end of the valve body is closed, the other end of the valve body is provided with an opening communicated with an oil outlet of a rotary motor, an overflowing hole communicated with an oil supplementing hole of the rotary motor is formed in the side wall, close to the opening, of the valve body, and the overflowing hole is communicated with the opening; the valve core structure is inserted into the valve body, the outer wall of the valve core structure is in sliding fit with the inner wall of the valve body, a channel with one closed end is axially arranged in the valve core structure, the closed end of the channel is close to the opening of the valve body, and the open end of the channel far away from the closed end is communicated with the opening on the valve body; the valve core spring is arranged on the valve core structure, and under the action of the valve core spring, the valve core structure and the opening on the valve body form a taper opening seal;
the one-way oil supplementing assembly comprises an oil supplementing valve sleeve, a one-way valve and an oil supplementing spring, the oil supplementing valve sleeve and the one-way valve are installed on the outer side of the valve body, the inner wall of the oil supplementing valve sleeve and the inner wall of the one-way valve are in sliding fit with the outer wall of the valve body, the valve body is inserted into the oil supplementing spring, the inner wall of the one-way valve and the overflowing hole form dynamic seal under the action of the oil supplementing spring, and the outer wall of the one-way valve and a seat cavity of the rotary motor form dynamic seal;
the rotary motor is provided with an oil inlet A, an oil inlet B and an oil supplementing opening which are mutually communicated, the opening of the valve body is communicated with the oil inlet A or the oil inlet B, the oil supplementing opening is axially penetrated through the valve body along the oil supplementing opening, when the pressure difference is formed between the oil inlet A or the oil inlet B and the oil supplementing opening, the check valve moves towards the direction of the opening far away from the valve body, and the oil supplementing opening is communicated with the overflowing hole.
Preferably, the valve body comprises a threaded sleeve inserted in the overflow valve seat, a valve body end cover and a threaded plug, a valve core structure is inserted in the threaded sleeve, the outer wall of the valve core structure is in sliding fit with the inner wall of the threaded sleeve, the valve body end cover is installed at one end, close to the cone valve, of the overflow valve seat, and the threaded plug is installed at the other end of the overflow valve seat.
Preferably, the valve core structure comprises a valve core main body, a valve core base, a valve core shaft, a valve sleeve and a cone valve; the valve core main body and the valve core base are arranged in the screw sleeve, the outer walls of the valve core main body and the valve core base are in sliding fit with the inner wall of the screw sleeve, and the inner wall of the screw sleeve is provided with a first step surface for axially limiting the valve core base;
the valve sleeve is internally provided with an axial through hole, the valve core shaft extends into the axial through hole of the valve sleeve, and the cone valve is arranged at one end of the valve sleeve, which is far away from the valve core shaft;
the valve sleeve extends into the valve core spring, one end of the valve sleeve is provided with an annular boss for axially limiting one end of the valve core spring, and the other end of the valve core spring is axially limited by the valve core main body;
the end cover of the valve body is provided with a through opening along the axial direction, and the end part of the cone valve is contacted with the inner wall of the opening to form cone opening sealing.
Preferably, the outer wall of the overflow valve seat is provided with a second step surface for axially limiting one end of the oil supplementing spring, the outer wall of the oil supplementing valve sleeve is provided with a boss for axially limiting the other end of the oil supplementing spring, and the oil supplementing spring is arranged between the second step surface and the boss.
Preferably, the overflow valve further comprises a nut for keeping the screw sleeve and the overflow valve seat fixed relatively, and the nut is mounted on the screw sleeve.
Preferably, the valve core further comprises a spring washer, the spring washer is sleeved on the valve core shaft, and one end, far away from the valve sleeve, of the valve core spring is in contact with the spring washer.
Preferably, the valve further comprises a first O-ring for sealing the valve sleeve and the overflow valve seat, a second O-ring and a retainer ring for sealing the overflow valve seat and the seat cavity, and a third O-ring for sealing the plug and the screw sleeve;
the screw sleeve is provided with an annular groove for accommodating a first O-shaped ring on the outer wall contacted with the inner wall of the overflow valve seat, the outer wall of the overflow valve seat is provided with a third step surface for installing a check ring and a second O-shaped ring, and the third O-shaped ring is installed between the screw plug and the screw sleeve.
A method of using a multi-function cartridge for a rotary motor, according to which a multi-function cartridge for a rotary motor comprises the steps of:
s1: when the device is started, the pressure rises instantly, the pressure acts on the end face of the cone valve, when the pressure can overcome the spring force, the valve core structure is not contacted with the opening on the valve body, and hydraulic oil enters from the opening and flows out of the overflowing hole, so that the buffer function is realized;
s2: hydraulic oil enters the opening end of the channel on the valve core structure through the internal oil duct, the valve core structure is pushed downwards, and the position is limited by the first step surface on the threaded sleeve; at the moment, the valve core spring is compressed to push the cone valve downwards to realize the sealing of the cone opening;
s3: when the pressure rises again, pressure acts on the end face of the cone valve, when the pressure can overcome the spring force, the valve core structure is not contacted with the opening on the valve body, hydraulic oil enters from the opening and flows out from the overflowing hole, and the overflowing function is realized.
Preferably, when equipment stall, the check valve forms sealedly with the laminating of seat chamber under the effect of oil supplementing spring, and when oil inlet A or oil inlet B formed the negative pressure, the oil supplementing mouth formed the pressure differential with oil inlet A or oil inlet B, overcome the spring force of oil supplementing spring, opened the check valve, realized the oil supplementing function.
The invention has the beneficial effects that:
the invention provides a multifunctional cartridge valve for a rotary motor and a use method thereof, and the multifunctional cartridge valve is provided with an overflow valve and a one-way oil supplementing valve, wherein the overflow valve can prevent the motor from being damaged by extreme high pressure and has a buffer function; the oil supplementing function of the check valve can be realized in the suction space area when the equipment stops rotating, the integration of the functions of the check oil supplementing valve and the overflow valve is realized, the valve body structure is reasonably optimized, the installation size of the equipment is reduced, and the check valve is suitable for smaller installation space.
Drawings
FIG. 1 is a schematic cross-sectional view of a multi-function cartridge valve for a rotary motor according to the present invention;
FIG. 2 is a schematic cross-sectional view of a multi-function cartridge valve for a rotary motor according to the present invention in a buffering state;
FIG. 3 is a schematic cross-sectional view of a multi-function cartridge valve for a rotary motor of the present invention as pressure is built;
FIG. 4 is a schematic cross-sectional view of a multi-function cartridge valve for a rotary motor of the present invention in an overflow condition;
FIG. 5 is an assembly view of a multi-function cartridge valve for a rotary motor of the present invention with a rotary motor housing.
Reference numerals are as follows:
1-a seat cavity;
2-valve body, 210-overflowing hole, 220-overflowing valve seat, 221-second step surface, 230-thread sleeve, 231-first step surface, 232-annular groove, 240-valve body end cover, 241-opening and 250-thread plug;
3-valve core structure, 310-valve core main body, 320-valve core base, 330-valve core shaft, 340-valve sleeve, 341-annular boss and 350-cone valve;
4-a valve core spring, 5-an oil supplementing valve sleeve, 510-a boss, 6-a one-way valve, 7-an oil supplementing spring, 8-an oil inlet A, 9-an oil inlet B, 10-an oil supplementing port, 11-a nut, 12-a spring washer, 13-a first O-shaped ring, 14-a second O-shaped ring, 15-a retainer ring and 16-a third O-shaped ring.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features or characteristics may be combined in any suitable manner in one or more embodiments.
Example 1
As shown in fig. 1-5, the multifunctional cartridge valve for the rotary motor is inserted into a seat cavity 1 of the rotary motor, and comprises an overflow assembly and a one-way oil supplementing assembly;
the overflow assembly comprises a valve body 2, a valve core structure 3 and a valve core spring 4, one end of the valve body 2 is closed, the other end of the valve body 2 is provided with an opening 241 communicated with an oil outlet of a rotary motor, the side wall of the valve body 2 close to the opening 241 is provided with an overflow hole 210 communicated with an oil supplementing port 10 of the rotary motor, and the overflow hole 210 is communicated with the opening 241; the valve core structure 3 is inserted into the valve body 2, the outer wall of the valve core structure 3 is in sliding fit with the inner wall of the valve body 2, a channel with one closed end is axially arranged in the valve core structure 3, the closed end of the channel is close to the opening 241 of the valve body 2, and the opening end of the channel far away from the closed end is communicated with the opening 241 on the valve body 2; the valve core spring 4 is arranged on the valve core structure 3, and under the action of the valve core spring 4, the valve core structure 3 and the opening 241 on the valve body 2 form a taper opening seal;
the one-way oil supplementing assembly comprises an oil supplementing valve sleeve 340, a one-way valve 6 and an oil supplementing spring 7, wherein the oil supplementing valve sleeve 340 and the one-way valve 6 are installed on the outer side of the valve body 2, the inner wall of the oil supplementing valve sleeve 340 and the inner wall of the one-way valve 6 are in sliding fit with the outer wall of the valve body 2, the valve body 2 is inserted into the oil supplementing spring 7, the inner wall of the one-way valve 6 and the overflowing hole 210 form dynamic sealing under the action of the oil supplementing spring 7, and the outer wall of the one-way valve 6 and the seat cavity 1 of the rotary motor form dynamic sealing;
be equipped with oil inlet A8, oil inlet B9 and the oil supplementing mouth 10 of intercommunication each other on the rotary motor, the opening 241 and oil inlet A8 or oil inlet B9 intercommunication of valve body 2, valve body 2 radially passes oil supplementing mouth 10 along oil supplementing mouth 10, and when oil inlet A8 or oil inlet B9 and oil supplementing mouth 10 formed pressure differential, check valve 6 removed towards the direction of keeping away from opening 241 of valve body 2, oil supplementing mouth 10 and overflowing hole 210 intercommunication.
According to the structure, the hydraulic driving device (the rotary motor) needs to be provided with the overflow valve and the one-way oil supplementing valve, the overflow valve assembly can avoid the motor from being damaged by extreme high pressure, and meanwhile, the buffer function is achieved, and the one-way valve 6 oil supplementing assembly can achieve the oil supplementing function for the suction space area when the equipment stops rotating.
As another specific scheme, the valve body 2 includes a threaded sleeve 230 inserted into the overflow valve seat 220, a valve body end cover 240 and a threaded plug 250, the valve core structure 3 is inserted into the threaded sleeve 230, an outer wall of the valve core structure 3 is in sliding fit with an inner wall of the threaded sleeve 230, the valve body end cover 240 is installed at one end of the overflow valve seat 220 close to the cone valve 350, and the threaded plug 250 is installed at the other end of the overflow valve seat 220.
As another specific solution, the valve core structure 3 includes a valve core main body 310, a valve core base 320, a valve core shaft 330, a valve sleeve 340 and a cone valve 350; the valve core main body 310 and the valve core base 320 are arranged in the threaded sleeve 230, the outer walls of the valve core main body 310 and the valve core base 320 are in sliding fit with the inner wall of the threaded sleeve 230, and the inner wall of the threaded sleeve 230 is provided with a first step surface 231 for axially limiting the valve core base 320;
the valve sleeve 340 is provided with an axial through hole, the valve core shaft 330 extends into the axial through hole of the valve sleeve 340, and the cone valve 350 is installed at one end of the valve sleeve 340 far away from the valve core shaft 330;
the valve sleeve 340 extends into the valve core spring 4, one end of the valve sleeve 340 is provided with an annular boss 341 for axially limiting one end of the valve core spring 4, and the other end of the valve core spring 4 is axially limited by the valve core main body 310;
the valve body end cover 240 is provided with a through opening 241 along the axial direction, and the end part of the cone valve 350 is contacted with the inner wall of the opening 241 to form a cone seal.
With the structure, the sealing effect of the cone mouth sealing is better than that of the plane sealing.
As another specific scheme, the outer wall of the overflow valve seat 220 is provided with a second step surface 221 for axially limiting one end of the oil compensation spring 7, the outer wall of the oil compensation valve sleeve 340 is provided with a boss 510 for axially limiting the other end of the oil compensation spring 7, and the oil compensation spring 7 is installed between the second step surface 221 and the boss 510.
As another specific scheme, the overflow valve further comprises a nut 11 for keeping the threaded sleeve 230 and the overflow valve seat 220 relatively fixed, and the nut 11 is mounted on the threaded sleeve 230.
As shown in FIG. 1, when the cartridge valve is not in operation: under the action of the valve core spring 4, the bevel of the cone valve 350 and the valve body end cover 240 realize a sealing function;
the working principle of the cartridge valve in the overflow function;
1. as shown in fig. 2, when the device is started, the pressure rises instantly and acts on the end surface of the cone valve 350, and when the pressure can overcome the spring force, the overflow valve is opened to realize the buffer function;
2. as shown in fig. 3, hydraulic oil enters the rear cavity of the valve core structure 3 through the internal oil passage, pushes the valve core structure 3 downward, and finally is limited by the step surface at the overflow valve seat 220; at the moment, the valve core spring 4 is compressed to push the cone valve 350 downwards to realize sealing;
3. as shown in fig. 4, when the pressure rises again, the pressure acts on the end surface of the cone valve 350, and when the pressure can overcome the spring force, the overflow valve is opened, so that the overflow function is realized;
the working principle of the cartridge valve in the oil supplementing function is as follows;
the cartridge valve is installed inside the seat cavity 1, the check valve 6 is attached to the seat cavity 1 to form sealing under the action of the oil supplementing spring 7, when the oil inlet A8 or the oil inlet B9 forms negative pressure, the oil supplementing port 10 and the oil inlet A8 or the oil inlet B9 form pressure difference, the spring force of the valve core spring 4 is overcome, the check valve 6 is opened, and the oil supplementing function is achieved.
Example 2
On the basis of embodiment 1, as shown in fig. 1 to 4, it is preferable that a spring washer 12 is further included, the spring washer 12 is sleeved on the spool shaft 330, and an end of the spool spring 4 away from the valve sleeve 340 is in contact with the spring washer 12.
Preferably, the valve further comprises a first O-ring 13 for sealing the valve sleeve 340 and the overflow valve seat 220, a second O-ring 14 and a retainer ring 15 for sealing the overflow valve seat 220 and the seat cavity 1, and a third O-ring 16 for sealing the plug 250 and the screw sleeve 230;
the screw sleeve 230 has an annular groove 232 for accommodating the first O-ring 13 on the outer wall contacting the inner wall of the overflow valve seat 220, the outer wall of the overflow valve seat 220 is provided with a third step surface for installing the retainer ring 15 and the second O-ring 14, and the third O-ring 16 is installed between the screw plug 250 and the screw sleeve 230.
The O-shaped sealing ring is suitable for being mounted on various mechanical equipment and plays a sealing role in a static state or a moving state under the specified temperature, pressure and different liquid and gas media. Generally, the sealing device is arranged in a groove with a rectangular section on the outer circle or the inner circle to play a sealing role. The O-shaped sealing ring still has good sealing and damping effects in the environments of oil resistance, acid and alkali resistance, grinding, chemical erosion and the like.
Example 3
On the basis of embodiment 1 or 2, fig. 1 to 4 show a method for using a multi-function cartridge for a rotary motor, according to which a multi-function cartridge for a rotary motor comprises the following steps:
s1: when the device is started, the pressure rises instantly, the pressure acts on the end face of the cone valve 350, when the pressure can overcome the spring force, the valve core structure 3 is not contacted with the opening 241 on the valve body 2, and hydraulic oil enters from the opening 241 and flows out from the overflowing hole 210, so that the buffer function is realized;
s2: hydraulic oil enters the open end of the channel on the valve core structure 3 through the internal oil passage, pushes the valve core structure 3 downwards, and is limited by the first step surface 231 on the threaded sleeve 230; at the moment, the valve core spring 4 is compressed to push the cone valve 350 downwards to realize cone opening sealing;
s3: when the pressure rises again, the pressure acts on the end face of the cone valve 350, when the pressure can overcome the spring force, the valve core structure 3 is not contacted with the opening 241 on the valve body 2, and the hydraulic oil enters from the opening 241 and flows out from the overflowing hole 210, so that the overflowing function is realized.
The structure has the function of an overflow valve, can avoid the damage to the motor caused by extreme high pressure, and has the function of buffering.
Example 4
As shown in fig. 5, the check valve 6 performs an oil replenishing function: when the equipment stops rotating, the oil supplementing function is realized for the suction space area, when the equipment stops rotating, the check valve 6 is attached to the seat cavity 1 to form sealing under the action of the oil supplementing spring 7, when the oil inlet A8 or the oil inlet B9 forms negative pressure, the oil supplementing port 10 and the oil inlet A8 or the oil inlet B9 form pressure difference, the spring force of the oil supplementing spring 7 is overcome, the check valve 6 is opened, and the oil supplementing function is realized.
The structure has the oil supplementing function of the check valve 6, and can realize the oil supplementing function for the suction space area when the equipment stops rotating.
In conclusion, the structure of the cartridge valve of the traditional hydraulic driving device (rotary motor) is optimized, the functions of the one-way oil supplementing valve and the overflow valve are integrated, the structure of the valve body 2 is reasonably optimized, the installation size of equipment is reduced, and the cartridge valve is suitable for smaller installation space.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims (9)

1. A multifunctional cartridge valve for a rotary motor is inserted into a seat cavity of the rotary motor and is characterized by comprising an overflow assembly and a one-way oil supplementing assembly;
the overflow assembly comprises a valve body, a valve core structure and a valve core spring, one end of the valve body is closed, the other end of the valve body is provided with an opening communicated with an oil outlet of a rotary motor, the side wall, close to the opening, of the valve body is provided with an overflowing hole communicated with an oil supplementing port of the rotary motor, and the overflowing hole is communicated with the opening; the valve core structure is inserted into the valve body, the outer wall of the valve core structure is in sliding fit with the inner wall of the valve body, a channel with one closed end is axially arranged in the valve core structure, the closed end of the channel is close to the opening of the valve body, and the open end of the channel far away from the closed end is communicated with the opening on the valve body; the valve core spring is arranged on the valve core structure, and under the action of the valve core spring, the valve core structure and the opening on the valve body form a taper opening seal;
the one-way oil supplementing assembly comprises an oil supplementing valve sleeve, a one-way valve and an oil supplementing spring, the oil supplementing valve sleeve and the one-way valve are installed on the outer side of the valve body, the inner wall of the oil supplementing valve sleeve and the inner wall of the one-way valve are in sliding fit with the outer wall of the valve body, the valve body is inserted into the oil supplementing spring, the inner wall of the one-way valve and the overflowing hole form dynamic seal under the action of the oil supplementing spring, and the outer wall of the one-way valve and a seat cavity of the rotary motor form dynamic seal;
the rotary motor is provided with an oil inlet A, an oil inlet B and an oil supplementing opening which are mutually communicated, the opening of the valve body is communicated with the oil inlet A or the oil inlet B, the oil supplementing opening is axially penetrated through the valve body along the oil supplementing opening, when the pressure difference is formed between the oil inlet A or the oil inlet B and the oil supplementing opening, the check valve moves towards the direction of the opening far away from the valve body, and the oil supplementing opening is communicated with the overflowing hole.
2. A multi-function cartridge valve for a rotary motor according to claim 1, wherein: the valve body comprises a threaded sleeve, a valve body end cover and a threaded plug, the threaded sleeve is inserted into the overflow valve seat, a valve core structure is inserted into the threaded sleeve, the outer wall of the valve core structure is in sliding fit with the inner wall of the threaded sleeve, the valve body end cover is installed at one end, close to the cone valve, of the overflow valve seat, and the threaded plug is installed at the other end of the overflow valve seat.
3. A multi-function cartridge valve for a rotary motor according to claim 2, wherein: the valve core structure comprises a valve core main body, a valve core base, a valve core shaft, a valve sleeve and a cone valve; the valve core main body and the valve core base are arranged in the screw sleeve, the outer walls of the valve core main body and the valve core base are in sliding fit with the inner wall of the screw sleeve, and the inner wall of the screw sleeve is provided with a first step surface for axially limiting the valve core base;
the valve sleeve is internally provided with an axial through hole, the valve core shaft extends into the axial through hole of the valve sleeve, and the cone valve is arranged at one end of the valve sleeve, which is far away from the valve core shaft;
the valve sleeve extends into the valve core spring, one end of the valve sleeve is provided with an annular boss for axially limiting one end of the valve core spring, and the other end of the valve core spring is axially limited by the valve core main body;
the end cover of the valve body is provided with a through opening along the axial direction, and the end part of the cone valve is contacted with the inner wall of the opening to form cone opening sealing.
4. A multi-function cartridge valve for a rotary motor according to claim 2, wherein: the outer wall of the overflow valve seat is provided with a second step surface for axially limiting one end of an oil supplementing spring, the outer wall of the oil supplementing valve sleeve is provided with a boss for axially limiting the other end of the oil supplementing spring, and the oil supplementing spring is arranged between the second step surface and the boss.
5. A multi-function cartridge valve for a rotary motor in accordance with claim 2, wherein: the overflow valve further comprises a nut used for keeping the threaded sleeve and the overflow valve seat relatively fixed, and the nut is installed on the threaded sleeve.
6. A multi-function cartridge valve for a rotary motor according to claim 3, wherein: the valve core spring is characterized by further comprising a spring washer, the spring washer is sleeved on the valve core shaft, and one end, far away from the valve sleeve, of the valve core spring is in contact with the spring washer.
7. A multi-function cartridge valve for a rotary motor according to claim 1, wherein: the valve also comprises a first O-shaped ring for sealing the valve sleeve and the overflow valve seat, a second O-shaped ring and a check ring for sealing the overflow valve seat and the seat cavity, and a third O-shaped ring for sealing the plug and the threaded sleeve;
the screw sleeve is provided with an annular groove for accommodating a first O-shaped ring on the outer wall contacted with the inner wall of the overflow valve seat, the outer wall of the overflow valve seat is provided with a third step surface for installing a check ring and a second O-shaped ring, and the third O-shaped ring is installed between the screw plug and the screw sleeve.
8. A method of using a multi-function cartridge for a rotary motor according to any one of claims 1 to 7, the method comprising: the method comprises the following steps:
s1: when the device is started, the pressure rises instantly, the pressure acts on the end face of the cone valve, when the pressure can overcome the spring force, the valve core structure is not contacted with the opening on the valve body, and hydraulic oil enters from the opening and flows out of the overflowing hole, so that the buffer function is realized;
s2: hydraulic oil enters the opening end of the channel on the valve core structure through the internal oil duct, the valve core structure is pushed downwards, and the position is limited by the first step surface on the threaded sleeve; at the moment, the valve core spring is compressed to push the cone valve downwards to realize the sealing of the cone opening;
s3: when the pressure rises again, pressure acts on the end face of the cone valve, when the pressure can overcome the spring force, the valve core structure is not contacted with the opening on the valve body, hydraulic oil enters from the opening and flows out from the overflowing hole, and the overflowing function is realized.
9. The method of using a multi-function cartridge for a rotary motor of claim 8, wherein: when the equipment stops rotating, the check valve is attached to the seat cavity to form sealing under the action of the oil supplementing spring, when the oil inlet A or the oil inlet B forms negative pressure, the oil supplementing opening and the oil inlet A or the oil inlet B form pressure difference, the spring force of the oil supplementing spring is overcome, the check valve is opened, and the oil supplementing function is realized.
CN202210472001.0A 2022-04-29 2022-04-29 Multifunctional cartridge valve for rotary motor and use method thereof Pending CN114810710A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009174575A (en) * 2008-01-22 2009-08-06 Hitachi Constr Mach Co Ltd Brake valve
CN103867764A (en) * 2014-03-03 2014-06-18 青岛力克川液压机械有限公司 Overflow valve for excavator walking motor
CN108547815A (en) * 2018-05-25 2018-09-18 龙工（上海）精工液压有限公司 Multifunctional rotating motor overflow valve
CN111878478A (en) * 2020-08-12 2020-11-03 江苏二马液压元件有限公司 High-pressure overflow valve for main control valve of large excavator
CN216199390U (en) * 2021-12-09 2022-04-05 烟台艾迪精密机械股份有限公司 Safety valve with oil supplementing function

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009174575A (en) * 2008-01-22 2009-08-06 Hitachi Constr Mach Co Ltd Brake valve
CN103867764A (en) * 2014-03-03 2014-06-18 青岛力克川液压机械有限公司 Overflow valve for excavator walking motor
CN108547815A (en) * 2018-05-25 2018-09-18 龙工（上海）精工液压有限公司 Multifunctional rotating motor overflow valve
CN111878478A (en) * 2020-08-12 2020-11-03 江苏二马液压元件有限公司 High-pressure overflow valve for main control valve of large excavator
CN216199390U (en) * 2021-12-09 2022-04-05 烟台艾迪精密机械股份有限公司 Safety valve with oil supplementing function

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