CN118149260A

CN118149260A - Rotary distributing valve, distributing device, centralized lubricating system and control method

Info

Publication number: CN118149260A
Application number: CN202410412636.0A
Authority: CN
Inventors: 钟伯录; 司艳凯; 崔自民; 李谷阳; 赵民章; 赵大平; 吴荫登
Original assignee: ZHENGZHOU AUTOL TECHNOLOGY CO LTD
Current assignee: ZHENGZHOU AUTOL TECHNOLOGY CO LTD
Priority date: 2023-11-30
Filing date: 2024-04-08
Publication date: 2024-06-07
Also published as: CN117515389A

Abstract

The invention provides a rotary distribution valve, a distribution device, a centralized lubrication system and a control method. The rotary distribution valve is at least suitable for lubrication systems with grease as a lubrication medium, and comprises at least one valve unit comprising a valve seat and a valve core. The valve seat defines a valve cavity having a first end and a second end opposite in a first direction and defining at least one inlet in a cavity wall of the first end and at least one outlet in the second end and/or in the cavity wall between the first end and the second end. The valve core is rotatably arranged in the valve cavity and defines at least one subchamber so as to enable the at least one subchamber to be switched between at least one inlet and at least one outlet under the condition that the valve core rotates. And forms a drive end located at a first end of the valve chamber, the drive end being configured to directly or indirectly connect to the drive mechanism. The electromagnetic valve can stably run for a long time, and the problem that the electromagnetic valve is out of order in the prior art is solved.

Description

Rotary distributing valve, distributing device, centralized lubricating system and control method

Technical Field

The invention relates to the technical field of equipment lubrication, in particular to a rotary distribution valve, a distribution device, a centralized lubrication system and a control method.

Background

At present, in a centralized lubrication system using lubricating grease as a lubricating medium, a distributing valve is generally used for distributing the lubricating grease, the distributing valve comprises a valve seat and a valve core, the valve seat is provided with a valve cavity extending along the length direction of the valve seat and a plurality of grease inlet channels and grease outlet channels communicated with the valve cavity, the valve seat is arranged in the valve cavity and moves back and forth along the length direction of the valve cavity, so that the on-off state control between the grease inlet channels and the grease outlet channels on the valve seat is realized, and the switching between the filling state and the stop state of the lubricating grease is realized. However, the blockage of such dispensing valves is frequently and has not been effectively resolved, for the following reasons:

on the one hand, in the moving process of the axially moving valve core, grease is required to be directly pushed, and the resistance caused by the pressure of the grease is large. Also grease adhering and drying onto the chamber wall needs to be scraped off by means of axially moving spools, which also gives a great resistance to axially moving spools. The distributing valve generally takes electromagnetic force or thrust of lubricating grease as driving force, particularly, the electromagnetic force generates heat, heat accumulation can cause the lubricating grease in the electromagnetic valve to be separated quickly, namely, the temperature rise can cause the base oil in the lubricating grease to be separated from the thickening agent to be separated quickly, and the thickening agent is adhered to the cavity wall and the pipe wall, so that the resistance born by the valve core during movement is further increased.

On the other hand, the electromagnetic force or the thrust of the lubricating grease are both indirectly driven, and the power loss is large in the working process. Moreover, the axially moving spool is at the end of travel, the electromagnetic force or the thrust of the grease is minimal, and the resistance is not significantly reduced.

The two reasons easily cause that the axially moving valve core is not moved to a proper position finally, so that the grease inlet channel and the grease outlet channel are not communicated, and the blockage of the distributing valve is caused to be out of the blockage. Accordingly, there is a need for a centralized lubrication system that addresses the above-described problems.

Disclosure of Invention

In view of the above problems, the present invention provides a rotary distributing valve, a distributing device, a centralized lubricating system and a control method for overcoming the above problems or at least partially solving the above problems, which can solve the problems that a spool axially moving in the distributing valve in the prior art is easy to be blocked in the working process, and further the distributing valve cannot normally perform the distributing work, even the whole centralized lubricating system cannot normally work, so as to achieve the purpose of ensuring the normal work of the distributing valve and the centralized lubricating system.

In particular, the invention provides a rotary distribution valve, at least suitable for lubrication systems with grease as a lubrication medium, comprising at least one valve unit comprising:

A valve seat defining a valve chamber, a first end and a second end of the valve chamber being opposite in a first direction and defining at least one inlet on a chamber wall of the first end and at least one outlet on the second end and/or a chamber wall between the first end and the second end;

A valve core rotatably arranged in the valve cavity and defining at least one subchamber for switching at least one subchamber between at least one inlet and at least one outlet under the condition that the valve core rotates; and forms a drive end located at a first end of the valve chamber, the drive end configured to directly or indirectly connect to a drive mechanism.

Optionally, a seal is disposed between the valve seat and the valve element and at least between at least one of the inlet and at least one of the outlet.

Optionally, in the case where there are at least two of said outlets, said seal is also located at least between at least two of said outlets.

Optionally, at least one lipid inlet channel and at least one lipid outlet channel are arranged on the valve seat, and one lipid inlet channel is communicated with one inlet; one of said lipid outlet channels communicates with one of said outlets; the valve seat comprises at least one valve cavity, and each valve cavity is internally provided with the valve core; the shape of the valve core is matched with the shape of the valve cavity; the valve core further comprises at least one oil dividing passage which is arranged in the valve core along the radial direction and communicated with the subchamber, and the subchamber is provided with a subchamber inlet; the valve core has a working valve position and a rest valve position when rotating in the valve cavity;

when the valve is at the working position, the fat inlet channel, the subchamber inlet, the subchamber, the oil dividing channel and the fat outlet channel are sequentially communicated;

In the rest valve position, the oil distribution channel is staggered relative to the oil outlet channel to close the oil distribution channel and the oil outlet channel.

Optionally, in one valve cavity, when the valve core is in the working state, one subchamber is communicated with one grease outlet passage only through one grease distribution passage.

Optionally, in each valve cavity of one valve unit, each subchamber of the valve core is communicated with one grease outlet channel only through one grease distribution channel at the same time.

Optionally, at least two oil distribution channels are arranged on the valve core, and at least two oil distribution channels are arranged at intervals along the circumferential direction of the valve core.

Optionally, at least two oil distributing channels are arranged on the valve core, at least two oil distributing channels are arranged at intervals along the axial direction of the valve core, at least two corresponding outlets on the valve cavity are arranged, and the oil distributing channels arranged at intervals along the axial direction are in one-to-one correspondence.

Optionally, at least two groups of oil distribution channels are arranged on the valve core at intervals along the axial direction, each group of oil distribution channels at least comprises two oil distribution channels, and projections of the oil distribution channels on a plane perpendicular to the axis of the valve core are not overlapped.

Optionally, each of said lipid outlet surfaces in communication with one of said valve cavities is coplanar.

Optionally, the valve core is formed by splicing a plurality of coaxial valve core sections, and each valve core section is in rotation-stopping fit.

Optionally, the valve seat is formed by splicing a plurality of valve body units, and the valve body units are detachably connected in a sealing manner.

Optionally, the lipid inlet channel and the subchamber are coaxially arranged, and the subchamber inlet and the lipid inlet channel are positioned at the second end.

Optionally, the valve cavity and the valve core are both cylindrical, the grease inlet channel is arranged on the valve seat along the radial direction of the valve cavity, the subchamber inlet is arranged along the radial direction of the valve core, a first annular groove is arranged on the circumferential surface of the valve core corresponding to the subchamber inlet, and the subchamber inlet is arranged in the first annular groove.

Optionally, the subchamber is provided with a subchamber outlet, the subchamber outlet is located at the first end, the subchamber outlet is arranged along the radial direction of the valve core, a second annular groove is formed in the circumferential surface of the valve core corresponding to the subchamber outlet, and the subchamber outlet is arranged in the second annular groove.

Optionally, one of the valve core and the valve seat is provided with a first limiting part, and the other one is provided with a second limiting part, and when the valve core rotates relative to the starting point of the valve seat, the first limiting part is in stop fit with the second limiting part so as to determine the initial position of the valve core.

Optionally, one of the valve core and the valve seat is provided with a convex sliding block to form the first limiting part, the other is provided with a concave third annular groove, and a stop protrusion is arranged in the third annular groove to form the second limiting part.

Optionally, an inductor is disposed on the outer peripheral surface of the valve core, and a sensor capable of detecting the inductor is correspondingly disposed on the valve seat, and the inductor can be detected by the sensor when rotating along with the valve core to the sensing range of the sensor, so as to determine the state of the valve core.

Optionally, the inductor is a permanent magnet, and the sensor is a hall sensor.

Optionally, an angle sensor is disposed on the driving mechanism or the valve core to detect a rotation angle of the valve core.

Optionally, a bearing is arranged between the valve core and the valve seat.

Optionally, the drive mechanism comprises a stepper motor.

Optionally, the valve core is connected with an axial driver to drive the valve core to axially move, and the driving stroke of the axial driver is greater than or equal to the diameter of the grease outlet channel or the oil dividing channel.

Optionally, the axial driver comprises a screw nut mechanism or a crank block mechanism or an electromagnetic drive mechanism.

The invention also provides a dispensing device comprising:

A rotary distribution valve according to any one of the preceding claims;

And the controller is in control connection with the driving mechanism of the rotary distribution valve so as to control the driving mechanism.

Optionally, the rotary distributing valve is correspondingly provided with a metering device for detecting the flow rate of the lubricating grease.

Optionally, the metering device is located on the pipeline before the lipid inlet channel of the valve seat and/or on the pipeline after the lipid outlet channel of the valve seat.

Alternatively, the controller may operate independently, or an interface module may be provided to receive control from the control module of the system.

The invention also provides a centralized lubrication system comprising a lubrication pump and at least one dispensing device as described above.

Optionally, the centralized lubrication system further comprises a control module for controlling the operation of the whole system, and the control module is connected with the controller of each distribution device.

The present invention also provides a control method of a centralized lubrication system, the control method being applied to the centralized lubrication system as described above, the control method comprising:

controlling the valve core of the rotary distribution valve to rotate and acquiring the position of an outlet;

And controlling the valve core of the rotary distribution valve to stop rotating according to the position of the outlet so as to enable the inlet to be communicated with the outlet.

Optionally, a magnetic signal device is arranged at the outlet to send out a magnetic signal;

the acquiring the outlet position comprises:

and detecting the magnetic signal, wherein the position from which the magnetic signal is sent is the position of the outlet.

Optionally, the controlling the rotation of the spool of the rotary distribution valve includes:

and controlling the rotation direction of the valve core of the rotary distribution valve.

Optionally, after the inlet communicates with the outlet, the method further comprises:

after stopping the first rotation for a preset time, controlling the valve core of the rotary distribution valve to reversely rotate for a second preset time; or alternatively

The valve core is provided with an initial position, and a magnetic signal device is arranged at the initial position;

After stopping the first rotation for a preset time, controlling the valve core of the rotary distribution valve to reversely rotate and acquiring the magnetic signal again, and controlling the valve core of the rotary distribution valve to stop rotating so as to enable the valve core of the rotary distribution valve to rotate to the initial position; or alternatively

And after stopping the first rotation for a preset time, controlling the valve core of the rotary distribution valve to continue rotating for a third preset time.

In the rotary distribution valve, the distribution device, the centralized lubrication system and the control method of the present invention, the pressure of the grease is highest at the inlet of the grease, and correspondingly, the resistance to the valve element is larger. If the drive mechanism is connected to the end remote from the grease inlet, that is to say the end of the valve spool remote from the drive mechanism, the resistance is greatest. The driving mechanism transmits torque to one end of the valve core close to the driving mechanism and with small resistance, the valve core transmits torque to one end far away from the driving mechanism and with large resistance by means of the rigidity of the valve core, the valve core is easy to twist, and further an inlet of a sub-cavity far away from one end of the driving mechanism is not corresponding to an inlet on the valve seat, so that work switching is inaccurate. Obviously, the problem can be avoided by arranging the driving end of the valve core connected with the driving mechanism at the inlet of the lubricating grease, and the driving mechanism directly transmits torque to the driving end to drive the whole valve core to rotate, so that the valve core is ensured to be reliably switched and simultaneously the valve core is prevented from deforming in the rotating process.

Further, in the distributing valve in the prior art, on-off is realized through the axially moving valve core, in the reciprocating working process, both ends of the axially moving valve core are subjected to pressure from lubricating grease, and particularly, the pressure at positions close to both ends of the valve seat is higher, so that the valve core is difficult to move, and the requirement on a mechanism for providing power is higher. In this embodiment, the rotary distributing valve is turned on and off by rotating the valve core at an angle, and the grease inlet is on the side surface of the valve cavity.

Further, in the prior art, when the valve core axially runs, the force provided by the end close to the electromagnetic end or the end close to the high-pressure lubricating grease is larger, the force provided by the end far away from the electromagnetic end or the end far away from the high-pressure lubricating grease is smaller, and finally the valve core is not in place when the valve core is far away from the electromagnetic end or the end far away from the high-pressure lubricating grease. The driving mechanism has continuous driving force, and can directly drive the valve core, and particularly after the rotary distribution valve works for a period of time, lubricating grease can enter between the valve core and the valve cavity, so that the resistance of the valve core to rotate is increased, and the driving mechanism correspondingly provides larger driving force, so that the valve core is ensured to rotate in place.

Further, after a period of operation, grease or grease dried up adheres to the inner wall surface of the valve cavity. In the prior art, when the axially moving valve core moves, lubricating grease adhered or dried on the inner wall of the valve cavity needs to be scraped off to normally move, and the valve core is subjected to high resistance, so that the valve core is easy to have the problems of clamping stagnation and blockage. In this embodiment, the movement state of the valve core of the rotary distribution valve is rotary, and compared with the prior art, the rotary distribution valve bears less resistance from the thickener attached to the inner wall surface of the valve cavity.

Furthermore, only one oil distribution channel is communicated with the grease outlet channel, namely, at the same time, only one outlet on one valve cavity outwards flows out grease, so that the metering of the grease outlet quantity is convenient, and the damping distribution condition can not occur.

Further, each oil distribution channel on one valve core is in a staggered arrangement mode, so that when one group of oil distribution channels are communicated with a corresponding oil outlet channel, the other group of oil distribution channels which are staggered with the corresponding oil outlet channel are in a non-communicated state, and the condition that a plurality of oil outlet channels are simultaneously used for discharging oil is avoided.

Furthermore, due to the design of the valve core segmented splicing structure, products tend to be modularized and standardized, the processing difficulty and the processing cost are remarkably reduced, the lubricating requirements under different scenes are met conveniently, no matter the number of lubricating points needed by different equipment is large or small, and only the valve cores with the corresponding number are assembled to be matched with the lubricating points. Valve cores with various lengths are not required to be designed according to different scenes, so that the production is convenient, the production efficiency is improved, and the production time is saved.

Furthermore, the valve seat also adopts an assembling structure, is convenient for realizing standardization and modularization, reduces the cost, improves the adaptability and the universality and further improves the production efficiency

Further, the matching of the sensing body and the corresponding sensor can be used for determining the zero point or the initial position of the valve core and determining the rotating state of the valve core so as to determine and remove faults in time compared with a traditional mechanical limiting structure.

Further, in the process of switching the outlet by rotation of the valve core, the grease distribution channels which do not need to be discharged with grease are conducted briefly when passing through the corresponding grease discharge channels, so that grease leakage is caused. In order to avoid the grease leakage condition, the axial driver is arranged, so that when the valve core rotates, the valve core is temporarily driven to axially displace by a certain amount to stagger the corresponding grease outlet channel, and the valve core is driven to axially displace to reset after the valve core rotates by a proper angle.

The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG. 1 is a schematic block diagram of a rotary distribution valve according to one embodiment of the present invention;

FIG. 2 is a schematic block diagram of a rotary distribution valve according to another embodiment of the present invention;

FIG. 3 is a schematic block diagram of a rotary distribution valve according to another embodiment of the present invention;

FIG. 4 is a cross-sectional view at A-A in FIG. 3;

FIG. 5 is a schematic block diagram of the connection of adjacent spools according to one embodiment of the invention;

FIG. 6 is a schematic block diagram of a rotary distribution valve according to another embodiment of the present invention;

FIG. 7 is a schematic block diagram of a rotary distribution valve according to another embodiment of the present invention;

FIG. 8 is a schematic block diagram of a rotary distribution valve according to another embodiment of the present invention;

FIG. 9 is a cross-sectional view at B-B in FIG. 8;

FIG. 10 is a schematic block diagram of a valve cartridge according to one embodiment of the present invention;

FIG. 11 is a schematic block diagram of a valve cartridge according to another embodiment of the present invention;

FIG. 12 is a schematic block diagram of a rotary distribution valve according to another embodiment of the present invention;

FIG. 13 is a schematic block diagram of a rotary distribution valve according to another embodiment of the present invention;

FIG. 14 is a schematic block diagram of a rotary distribution valve according to another embodiment of the present invention;

FIG. 15 is a schematic block diagram of a centralized lubrication system according to one embodiment of the present invention;

Fig. 16 is an enlarged view at C in fig. 15;

FIG. 17 is a flow chart of a centralized lubrication system according to one embodiment of the present invention;

FIG. 18 is a flow chart of a centralized lubrication system according to another embodiment of the present invention;

Fig. 19 is a schematic structural view of a rotary distribution valve according to another embodiment of the present invention.

Detailed Description

A rotary distribution valve, a distribution device, a centralized lubrication system, and a control method according to an embodiment of the present invention are described below with reference to fig. 1 to 19. In the description of the present embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature, i.e. one or more such features. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. When a feature "comprises or includes" a feature or some of its coverage, this indicates that other features are not excluded and may further include other features, unless expressly stated otherwise.

Unless specifically stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," "coupled," and the like should be construed broadly, as they may be connected, either permanently or removably, or integrally; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. Those of ordinary skill in the art will understand the specific meaning of the terms described above in the present invention as the case may be.

Furthermore, in the description of the present embodiments, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature therebetween. That is, in the description of the present embodiment, the first feature being "above", "over" and "upper" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature "under", "beneath", or "under" a second feature may be a first feature directly under or diagonally under the second feature, or simply indicate that the first feature is less level than the second feature.

In the description of the present embodiment, a description referring to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Fig. 1 is a schematic structural view of a rotary distribution valve according to an embodiment of the present invention, and as shown in fig. 2 to 14, an embodiment of the present invention provides a rotary distribution valve at least suitable for a lubrication system using grease as a lubrication medium, comprising at least one valve unit including a valve seat 2 and a valve core 3. The valve seat 2 defines a valve chamber 22, the first and second ends of the valve chamber 22 being opposite in the first direction and defining at least one inlet in the chamber wall of the first end and at least one outlet in the second end and/or in the chamber wall between the first and second ends. The valve spool 3 is rotatably disposed in the valve chamber 22 and defines at least one subchamber 31 to cause switching of the at least one subchamber 31 between at least one inlet and at least one outlet in the event of rotation of the valve spool 3. And forms a drive end that is located at a first end of the valve chamber 22, the drive end being configured to directly or indirectly connect to a drive mechanism.

In the rotary distributing valve provided by the embodiment of the invention, when the lubricating grease needs to be distributed, the driving mechanism is started to drive the driving end of the valve core 3 to rotate so as to enable the valve core 3 to rotate in the valve cavity 22, and at least one inlet and at least one outlet on the cavity wall are further communicated with the subchamber 31, that is, the inlet and the outlet are communicated through the subchamber 31. Grease enters subchamber 31 from an inlet in the chamber wall at the first end and then passes through subchamber 31 to an outlet in communication with subchamber 31 and out of the outlet. When at least a plurality of outlets are arranged, the valve core 3 can be driven by the driving mechanism to rotate, so that the valve core 3 can rotate at different angles, and different outlets are controlled to flow out of the lubricating grease, so that the distribution of the lubricating grease is realized.

At the grease inlet, the pressure of the grease is highest, and correspondingly the greater the resistance to the valve core 3. If the drive mechanism is connected to the end remote from the grease inlet, that is to say the end of the valve core 3 remote from the drive mechanism, the resistance is greatest. The driving mechanism transmits torque to one end of the valve core 3 close to the driving mechanism and with small resistance, the valve core 3 transmits torque to one end far away from the driving mechanism and with large resistance by means of rigidity of the valve core 3, so that the valve core is easy to twist, and further the inlet of the sub-cavity 31 far away from one end of the driving mechanism is not corresponding to the inlet on the valve seat 2, and the work switching is inaccurate. Obviously, the problem can be avoided by arranging the driving end of the valve core 3 connected with the driving mechanism at the inlet of the lubricating grease, the driving mechanism directly transmits torque to the driving end to drive the whole valve core 3 to rotate, and the valve core 3 is prevented from deforming in the rotating process while the reliable switching action of the valve core 3 is ensured.

Further, in the distributing valve in the prior art, on-off is realized through the axially moving valve core, in the reciprocating working process, both ends of the axially moving valve core are subjected to pressure from lubricating grease, and particularly, the pressure at positions close to both ends of the valve seat is higher, so that the valve core is difficult to move, and the requirement on a mechanism for providing power is higher. In this embodiment, the rotary distributing valve is turned on and off by rotating the valve core 3 at an angle, and the grease inlet is on the side surface of the valve cavity, compared with the prior art, the pressure from the grease borne by the rotary distributing valve is smaller and more uniform, and the driving mechanism can ensure the normal rotation of the valve core 3 only by using less power.

Further, in the prior art, the valve core is driven by the electromagnetic or directly driven by the pressure of the lubricating grease, when the valve core axially runs, the force provided by one end close to the electromagnetic or one end close to the high-pressure lubricating grease is larger, the force provided by one end far away from the electromagnetic or one end far away from the high-pressure lubricating grease is smaller, and finally the valve core is not in place when moving far away from the electromagnetic or one end far away from the high-pressure lubricating grease. The driving mechanism has continuous driving force, and directly drives the valve core 3, and particularly after the rotary distribution valve works for a period of time, lubricating grease can enter between the valve core 3 and the valve cavity, so that the resistance of the valve core to rotate is increased, and the driving mechanism correspondingly provides larger driving force, so that the valve core 3 is ensured to rotate in place.

Further, after a period of operation, grease or grease dried up adheres to the inner wall surface of the valve cavity. In the prior art, when the axially moving valve core moves, lubricating grease adhered or dried on the inner wall of the valve cavity needs to be scraped off to normally move, and the valve core is subjected to high resistance, so that the valve core is easy to have the problems of clamping stagnation and blockage. In this embodiment, the valve core 3 of the rotary distribution valve is rotated, and compared with the prior art, the rotary distribution valve bears less resistance from the thickener attached to the inner wall surface of the valve cavity.

In this embodiment, the arrangement of the plurality of inlets, outlets and subchambers 31 increases the application range of the rotary distributing valve and reduces the manufacturing cost of the lubrication system in a certain sense.

In some embodiments of the invention, as shown in fig. 1 to 3 and 6 to 8, the rotary distribution valve further comprises a seal, arranged between the valve seat 2 and the valve core 3, at least between the at least one inlet and the at least one outlet.

In this embodiment, the sealing ring 4 is arranged to avoid communication between the inlet and the outlet. The small gap is arranged between the valve core 3 and the valve cavity 22 of the valve seat 2, and the lubricating grease can flow easily from the small gap without arranging the sealing ring 4 or other sealing structures, so that the resistance of the valve core 3 to rotation is increased. The arrangement is such that the outlet and inlet are separated, preventing grease from flowing between them through the gap between the valve seat 2 and the valve core 3.

In some embodiments of the invention, as shown in fig. 1 to 3 and 6 to 8, where there are at least two outlets, the seal is also located at least between the at least two outlets.

In this embodiment, the sealing ring 4 can avoid the communication between two outlets, that is, the sealing ring 4 divides each two outlets, so as to prevent the grease from flowing in a small gap between the valve core 3 and the valve cavity 22 of the valve seat 2, and even entering different outlets, thereby affecting the distribution effect of the grease. The sealing ring 4 is arranged to enable lubricating grease to flow out from a designated outlet, so that stable and safe operation of the lubricating system is ensured.

In some embodiments of the present invention, as shown in fig. 1 to 3 and 6 to 8, at least one lipid inlet channel 21 and at least one lipid outlet channel 23 are provided on the valve seat 2, one lipid inlet channel 21 being in communication with one inlet. A lipid outlet channel 23 communicates with an outlet. The valve seat 2 includes at least one valve chamber 22, and a valve element 3 is disposed in each valve chamber 22. The shape of the valve core 3 is adapted to the shape of the valve chamber 22. The subchamber 31 is located inside the valve core 3 and is arranged in the axial direction of the valve core 3, the valve core 3 further comprises at least one oil dividing duct 32 which is arranged in the valve core 3 in the radial direction and is communicated with the subchamber 31, and the subchamber 31 is provided with a subchamber inlet 33. The spool 3 has a working valve position and a rest valve position when rotated in the valve chamber 22.

In the working valve position, the fat inlet channel 21, the subchamber inlet 33, the subchamber 31, the oil dividing channel 32 and the fat outlet channel 23 are communicated in sequence.

In the rest position, the branch oil passage 32 is staggered with respect to the oil discharge passage 23 to close the branch oil passage 32 and the oil discharge passage 23.

In this embodiment, when the spool 3 is in the working position, the spool 3 rotates in the valve chamber 22 so that the lipid inlet passage 21, the subchamber inlet 33, the subchamber 31, the oil separation passage 32, and the lipid outlet passage 23 are sequentially communicated. At this time, the grease enters the rotary distribution valve from the grease inlet passage 21, then enters the subchamber 31 through the subchamber inlet 33, and the grease in the subchamber 31 enters the grease outlet passage 23 through the oil separation passage 32, and finally flows out through the grease outlet passage 23. When the valve core 3 is at the rest valve position, the valve core 3 rotates in the valve cavity 22 to stagger the oil distribution channel 32 relative to the grease outlet channel 23, and further the oil distribution channel 32 and the grease outlet channel 23 are closed, so that grease cannot flow out. The structure is simple, and the operation is very convenient.

In some embodiments of the present invention, as shown in fig. 1 to 3 and fig. 6 to 8, in one valve chamber 22, one subchamber 31 communicates with one lipid outlet passage 23 only through one oil distribution passage 32 when the valve spool 3 is in an operating state.

In this embodiment, only one oil distribution channel 32 is communicated with the oil outlet channel 23, that is, at the same time, only one outlet on one valve cavity 22 outwards flows out grease, so that not only is the metering of the oil outlet quantity convenient, but also the damping distribution can not occur. When at least two outlets are communicated with the same oil supply path at the same time in damping distribution, the grease outlet quantity of the outlet with small resistance is larger than that of the outlet with large resistance, even only the outlet with small resistance is used for discharging grease, and the embodiment can ensure that the condition that the grease outlet quantity of a certain outlet cannot meet the requirement due to damping distribution is avoided.

In some embodiments of the present invention, as shown in fig. 1 to 3 and fig. 6 to 8, in each valve chamber 22 of one valve unit, each subchamber 31 of the spool 3 communicates with one lipid outlet passage 23 through only one oil separation passage 32 at the same time.

In this embodiment, not only one valve cavity 22 is provided, but only one outlet is provided at a time between a plurality of valve cavities 22 on one valve seat 2, so that the standard of the grease output is ensured, and the damping distribution is avoided.

In some embodiments of the present invention, as shown in fig. 1 to 3 and fig. 6 to 8, at least two sub-oil passages 32 are provided on the spool 3, and at least two sub-oil passages 32 are provided at intervals along the circumferential direction of the spool 3.

In this embodiment, at least two oil distribution channels 32 are arranged at intervals along the circumferential direction, and different oil distribution channels 32 can be communicated with the oil outlet channel 23 along with the rotation of the rotary valve core 3, so that the valve core 3 can meet the purpose of communicating the oil distribution channels 32 with the oil outlet channel 23 without the need of overlarge rotation angle. For example, when two branch oil channels 32 are circumferentially arranged on the valve core 3, the communication between the other branch oil channel 32 can be switched by rotating 180 degrees; when three oil distribution channels 32 are arranged in the circumferential direction of the valve core 3, the valve core can only rotate 120 degrees.

In some embodiments of the present invention, as shown in fig. 1 to 3 and fig. 6 to 8, at least two sub-oil channels 32 are disposed on the valve core 3, at least two sub-oil channels 32 are disposed at intervals along the axial direction of the valve core 3, and at least two corresponding outlets on the valve cavity 22 are disposed at intervals along the axial direction and correspond to the sub-oil channels 32 disposed at intervals along the axial direction one by one.

In this embodiment, the oil distribution channels 32 on the valve core 3 are arranged at intervals along the axial direction, and the oil outlet channels 23 are arranged at intervals correspondingly, so that the purpose that the oil distribution channels 23 are distributed along the axial direction is achieved conveniently by the way of arranging the oil distribution channels 32 along the axial direction, and the oil pipe joints are arranged on each oil outlet channel 23 more conveniently.

In some embodiments of the present invention, as shown in fig. 4, at least two component oil passages 32 are disposed on the spool 3 at intervals in the axial direction, each component oil passage 32 includes at least two component oil passages 32, and projections of the respective component oil passages 32 on a plane perpendicular to the axis of the spool 3 do not overlap.

In this embodiment, each of the oil distribution channels 32 on one valve core 3 is arranged in a staggered manner, so that when one of the oil distribution channels 32 is communicated with a corresponding oil outlet channel 23, the other oil distribution channel 32 is not communicated with the corresponding oil outlet channel, thereby avoiding the occurrence of the condition that a plurality of oil outlet channels 23 are simultaneously used for discharging oil.

In some embodiments of the invention, as shown in fig. 1-3 and 6-8, the lipid outlet faces in communication with one valve cavity 22 are coplanar.

In this embodiment, since the oil pipe joint and the oil pipe joint are required to be installed on the oil outlet channels 23, the arrangement of the oil pipe and the oil pipe joint is more orderly and the space is saved, so that each oil outlet channel 23 is arranged in the same plane.

In some embodiments of the present invention, as shown in fig. 8, the valve core 3 is formed by splicing a plurality of coaxial valve core segments, and each valve core segment is in anti-rotation fit.

In this embodiment, the design of the segment splicing structure of the valve core 3 makes the product tend to be modularized and standardized, not only significantly reduces the processing difficulty and the processing cost, but also is convenient for adapting to the lubrication requirements under different scenes, no matter how many or fewer lubrication points are needed by different equipment, only the valve core 3 with corresponding number needs to be spliced and adapted. The valve core 3 with various lengths does not need to be designed according to different scenes, so that the production is convenient, the production efficiency is improved, and the production time is saved.

In some embodiments of the present invention, as shown in fig. 5 and 8, the connection manner between any two adjacent valve core segments may be a spigot butt joint, and the spigot 6 is matched to locate and plug the connection structure.

In some embodiments of the present invention, as shown in fig. 8, the valve seat 2 is formed by splicing a plurality of valve body units, and the valve body units are detachably and hermetically connected.

In this embodiment, the valve seat 2 also adopts an assembling structure, which is convenient for realizing standardization and modularization, reducing cost, improving adaptability and universality and further improving production efficiency.

In some embodiments of the invention, the lipid inlet channel 21 is arranged coaxially with the subchamber 31, the subchamber inlet 33 and the lipid inlet channel 21 being located at the second end. In this embodiment, the number of holes formed in the valve seat 2 can be reduced, and the flow resistance of grease can be reduced.

In some embodiments of the present invention, as shown in fig. 1 to 3 and fig. 6 to 8, the valve cavity 22 and the valve core 3 are both cylindrical, the grease inlet channel 21 is arranged on the valve seat 2 along the radial direction of the valve cavity 22, the subchamber inlet 33 is arranged along the radial direction of the valve core 3, the valve core 3 is provided with a first annular groove 34 corresponding to the circumferential surface of the subchamber inlet 33, and the subchamber inlet 33 is arranged in the first annular groove 34.

In this embodiment, the valve cavity 22 and the valve core 3 are cylindrical structures, and compared with other rotary structures, the processing is more convenient, the cost is lower, the precision is easier to ensure, and the modular serial connection is convenient to realize. The arrangement of the first annular groove 34 enables the grease flowing into the grease inlet channel 21 to flow into the radially arranged subchamber inlet 33 through the first annular groove 34 at any time and then into the subchamber 31, namely, the first annular groove 34 ensures that the inlet of the subchamber 31 radially arranged on the valve core 3 can be always communicated with the grease inlet channel 21 on the valve seat 2.

In some embodiments of the present invention, as shown in fig. 6, the subchamber 31 has a subchamber outlet 35, the subchamber outlet 35 is located at a first end, the subchamber outlet 35 is disposed along a radial direction of the valve core 3, a second annular groove 36 is disposed on a circumferential surface of the valve core 3 corresponding to the subchamber outlet 35, and the subchamber outlet 35 is disposed within the second annular groove 36.

In this embodiment, the same principle as that of the first annular groove 34 in the above embodiment, the second annular groove 36 may ensure that the subchamber 31 may communicate with the outlet via the radially arranged subchamber outlet 35, so as to open into the next valve chamber 22 or subchamber 31 of the next rotary distribution valve, thereby achieving the purpose of sharing the same lipid supply source.

In some embodiments of the present invention, one of the valve core 3 and the valve seat 2 is provided with a first limit portion, and the other is provided with a second limit portion, and when the valve core 3 rotates relative to the valve seat 2 at a starting position, the first limit portion is in stop fit with the second limit portion to determine an initial position of the valve core 3.

In this embodiment, the first and second limiting portions ensure that the spool 3 can find the initial position of rotation, that is, the zero position, so as to accurately determine the rotation angle with the initial position as a reference.

Further, one of the valve core 3 and the valve seat 2 is provided with a convex sliding block to form a first limiting part, the other is provided with a concave third annular groove, and a stop protrusion is arranged in the third annular groove to form a second limiting part.

In some embodiments of the present invention, the outer peripheral surface of the valve core 3 is provided with an inductor, and the valve seat 2 is correspondingly provided with a sensor capable of detecting the inductor, and the inductor can be detected by the sensor when rotating along with the valve core 3 to the sensing range of the sensor so as to determine the state of the valve core 3.

In this embodiment, the cooperation of the sensing body and the corresponding sensor, compared with the conventional mechanical limiting structure, not only can be used for determining the zero point or the initial position of the valve core 3, but also can be used for determining the rotation state of the valve core 3, so as to determine and remove faults in time.

In some embodiments of the invention, the sensing body is a permanent magnet 7 and the sensor is a hall sensor 8.

In some embodiments of the present invention, an angle sensor is provided on the drive mechanism or the spool 3 to detect the rotation angle of the spool 3.

In some embodiments of the invention, a bearing is provided between the valve element 3 and the valve seat 2.

In the embodiment, the bearing not only plays a role in guiding, positioning and supporting the valve core 3, but also can obviously reduce the resistance of the valve core 3 in rotation, reduce the kinetic energy consumption of a driving mechanism and prolong the service lives of the rotary distribution valve and the driving mechanism.

In some embodiments of the invention, as shown in fig. 1 to 3 and 6 to 8, the drive mechanism comprises a stepper motor 1.

In this embodiment, the stepper motor 1 has the advantages of precise angular rotation, convenient control, small size, high stability, etc.

In some embodiments of the present invention, the valve core 3 is connected to an axial driver to drive the valve core 3 to move axially, and the driving stroke of the axial driver is greater than or equal to the diameter of the grease outlet channel 23 or the branch oil channel 32.

In this embodiment, the oil distribution channel 32 that does not need to be discharged is turned on briefly when passing through the corresponding oil discharge channel 23 in the process of switching the outlet by rotation of the valve core 3, so that oil leakage is caused. In order to avoid the grease leakage, an axial driver is arranged, so that when the valve core 3 rotates, the valve core 3 is temporarily driven to axially displace by a certain amount to stagger the corresponding grease outlet channel 23, and after the rotation angle of the valve core 3 is in place, the valve core 3 is driven to axially displace for resetting.

In some embodiments of the invention, the axial drive comprises a lead screw nut mechanism or a crank block mechanism or an electromagnetic drive mechanism.

An embodiment of the present invention provides a dispensing device comprising a rotary dispensing valve and a controller as in the above embodiments. The controller is in control connection with the drive mechanism of the rotary distribution valve to control the drive mechanism.

In this embodiment, when the rotary distribution valve is operated, the controller is started, and the controller operates the driving mechanism to switch the valve element 3 of the rotary distribution valve between the above-described operating valve position and the rest valve position. The automatic degree of the rotary distribution valve is improved by the arrangement of the controller, and manual frequent adjustment is not needed.

In some embodiments of the invention, the rotary distribution valve is correspondingly provided with a metering device for detecting the flow rate of the grease.

In this embodiment, by setting the metering device, the amount of the fat discharged from any fat discharging channel 23 can be counted, and when the amount of the fat discharged reaches the requirement, the driving mechanism can be controlled to switch the valve position by the feedback of the metering device, for example, the next fat discharging channel 23 needing to discharge the fat can be switched to work. The accurate oil delivery of the rotary distributing valve is ensured.

In some embodiments of the invention, the metering means are located in the line before the inlet channel 21 of the valve seat 2 and/or in the line after the outlet channel 23 of the valve seat 2.

In this embodiment, the metering device is disposed on the pipeline in front of the near-grease channel, so as to count the total flow, and the metering device is disposed on the grease outlet channel 23, so as to accurately know the flow of each grease outlet channel 23, that is, know the amount of grease flowing to the lubrication point, so that the two components are matched to facilitate fault diagnosis.

In some embodiments of the invention, the controller may operate independently, or an interface module may be provided to receive control from the control module of the system.

In this embodiment, since the controller operates independently, one dispensing device is an independent lubrication device product. At the same time, the controller may also be connected to the system control module via the interface module and receive overall control, so that the dispensing device may form part of a super-system, i.e. a larger lubrication system or other system.

As shown in fig. 15, an embodiment of the present invention provides a centralized lubrication system comprising a lubrication pump 40 and at least one dispensing device as in the previous embodiments.

In some embodiments of the present invention, as shown in fig. 15 and 16, the centralized lubrication system further includes a control module to control the overall system operation, the control module being coupled to the controller of each of the distribution devices.

In this embodiment, the centralized lubrication system is mainly used for performing overall automatic centralized lubrication on each friction pair of the device, so as to ensure that each friction pair can obtain a required proper amount of grease, and the centralized lubrication system in this embodiment includes a mobile terminal 10, a control cabinet 20, a grease supplementing system unit S1 and a plurality of lubrication system units S2. The mobile terminal 10 may be a mobile phone or a notebook computer, and is connected to the control cabinet 20 through a wireless communication manner, where the control cabinet 20 is used as a total control device for centralized processing of the whole centralized lubrication system, and may be in control connection with the grease supplementing controller 51 of each grease supplementing system unit S1 and the lubrication controller of each lubrication system unit S2, and receive signal feedback of the grease supplementing controller 51 and the lubrication controller and may control the signals to execute corresponding instructions. The control cabinet 20 and the grease supplementing controller 51 or the lubrication controller can be connected in a wired mode, and can also be connected in a wireless mode if the distribution range of the system is large. The lubrication system unit S2 is an execution unit of the centralized lubrication system, and includes a lubrication pump 40, a solenoid valve 42, a plurality of rotary distribution valves, and accessories such as a piping harness, a joint, and the like. The lubrication pump 40 includes a storage lubrication tank 43, a monitor, a plunger pump, a motor, etc., and pumps out the grease in the lubrication tank 43 according to a set program and sends the grease to the rotary distribution valve group 44 through a pipeline, and the grease is sent from the corresponding grease outlet channel 23 to the lubrication point of the corresponding friction pair through the distribution of the valve core 3 of the rotary distribution valve. The rotary distribution valve assembly 44 is a structure in which a plurality of rotary distribution valve assemblies 44 are combined together, and the structure of the rotary distribution valve assembly is the same as that of the above embodiment, and will not be described again.

The centralized lubrication system is in operation: the mobile terminal 10 may be used to set parameters and control the operation and shutdown of the overall centralized lubrication system and may view the system operating status in real time. The controller can control the operation and stop of the system through the lubrication controller of each lubrication system unit S2, taking one lubrication system unit S2 as an example, the lubrication controller receives an instruction and then controls the lubrication pump 40 to start, the lubrication pump 40 operates according to a set program, the lubrication pump 40 sends out the lubricating grease to the rotary distribution valve group 44 through the main oil pipeline, specifically as shown in fig. 16, after the lubricating grease enters through the grease inlet channel 21 of the first rotary distribution valve, the lubricating grease enters the grease inlet channel 21 of each subsequent rotary distribution valve sequentially, the lubricating grease of the grease inlet channel 21 enters the subchamber 31 through the inlet on each valve core 3, the valve core 3 rotates by a set angle along with the control of the lubrication controller on the stepping motor 1 of the rotary distribution valve, the grease outlet channel 23 needing to be discharged is communicated with the subchamber 31 through the oil distribution channel 32, and then the lubricating grease smoothly enters the corresponding grease outlet channel 23 through the branch oil pipeline directly to the friction pair, so as to realize the lubrication of the friction pair. When the lubricating grease filled in the friction pair reaches the set quantity, the lubrication controller controls the stepping motor 1to operate, drives the valve core 3 to rotate for a certain angle, and is communicated with the oil distributing channel 32 until the next grease outlet channel 23 needing grease outlet, the subsequent lubrication of each friction pair is sequentially completed, after all the friction pair is filled, the stepping motor 1 rotates to a state that the oil distributing channel 32 is not communicated with the oil outlet channel 23, so that the grease outlet channel 23 is closed, and one lubrication period is completed. When the lubricating oil tank 43 of a certain lubricating system unit S2 is detected to be lack of lubricating grease by the corresponding liquid level monitoring module 53, a signal is fed back to the control cabinet 20, the control cabinet 20 can control the lubricating system unit S2 to stop, give an instruction to the grease supplementing controller 51, control the grease supplementing system unit S1 to start, the grease supplementing pump 30 pumps out the lubricating grease in the grease supplementing oil tank 52 through the grease supplementing pipeline, the control cabinet 20 simultaneously controls the electromagnetic valve 42 of the lubricating system unit S2 corresponding to lack of lubricating grease to be opened, the lubricating grease smoothly enters the lubricating oil tank 43 of the lubricating system unit S2, and when the filling is finished, the liquid level monitoring module 53 feeds back a filling signal, the control cabinet 20 controls the grease supplementing pump 30 to stop, and controls the corresponding electromagnetic valve 42 to close and the lubricating system unit S2 to continue to operate.

In some embodiments of the present invention, as shown in fig. 3, the rotary distributing valve includes a valve seat 2 formed by assembling multiple pieces and a valve core 3 formed by splicing multiple pieces, the splicing adopts a mechanical structure, the interface has good sealing, the valve seat 2 can be rectangular and made of stainless steel, a cylindrical grease inlet channel 21 with two ends penetrating through a valve cavity 22 is arranged in the valve seat 2, and the grease inlet channel and the corresponding outlet are led into the two ends of the valve cavity 22 from the lower end in a radial direction. The valve seat 2 is provided with a grease outlet channel 23 corresponding to each valve body unit, the grease outlet channels 23 are led to the valve cavity 22, and the grease outlet channels 23 are arranged at intervals along the axial direction and are positioned in the same plane, and the optimal scheme is that the grease outlet channels are distributed above as shown in fig. 3. The valve core 3 is integrally of a cylindrical structure with the shape and the size of the valve cavity 22 being matched, the inner part is axially perforated to form a subchamber 31, multiple component oil channels 32 are uniformly distributed along the axial direction of the valve core 3 at intervals, and each component oil channel 32 is coplanar along a plane perpendicular to the axis of the valve core 3. As shown in fig. 4, each component oil passage 32 has four oil outlet passages 23, which are uniformly distributed along the circumferential direction of the valve core 3, and the oil outlet passages 23 corresponding to each component oil passage 32 are coplanar with each other, and the oil outlet passages 32 can be coaxially conducted with the corresponding oil outlet passages 23 at a certain time in the rotation process, so that the subchambers 31 are communicated with the oil outlet passages 23. Wherein, the outer peripheral surface of the valve core 3 and the inner peripheral surface of the valve cavity 22 are subjected to precise grinding processing to ensure the matching precision. The valve core 3 may be made of stainless steel or other metal or nonmetal with higher hardness and strength. The fourth annular grooves are respectively arranged on the two sides of the group of oil passages 32 of each section of valve core 3 so as to be convenient for installing the sealing rings 4, so that at least one sealing ring 4 is arranged between any two groups of oil passages 32, and further, the rotary sealing between the outer peripheral surface of the valve core 3 and the inner peripheral surface of the valve cavity 22 is realized, and the adjacent two grease outlet passages 23 arranged in the axial direction cannot be communicated. In order to realize the sealing between the two ends of the valve core 3 and the two ends of the valve cavity 22 of the valve seat 2, larger sealing rings 4 can be arranged at the two ends of the valve cavity 22 to seal, so that grease in a gap between the valve core 3 and the valve cavity 22 is prevented from seeping out from the two ends. One end of the valve core 3 is also connected with a stepping motor 1 in a transmission way to be used as a driving mechanism, and the valve core 3 can rotate under the driving of the stepping motor 1. And the other end of the valve core 3 is provided with a plug 5 or a blind hole structure to prevent grease from flowing out of the left side of the subchamber 31. The valve core 3 has a working valve position and a rest valve position when rotating in the valve cavity 22; when the valve is in a working position, the fat inlet channel 21, the inlet, the subchamber 31, the oil dividing channel 32 and the fat outlet channel 23 are communicated in sequence; in the rest position, the branch oil passage 32 is staggered with respect to the oil discharge passage 23 to close the branch oil passage 32 and the oil discharge passage 23. The valve core 3 is provided with multiple component oil channels 32 at intervals along the axial direction, each component oil channel 32 comprises four component oil channels 32, and the projections of the respective component oil channels 32 on a plane perpendicular to the axis of the valve core 3 are not overlapped. By the staggered arrangement mode, when one group of oil distribution channels 32 are communicated with one corresponding oil outlet channel 23, the other group of oil distribution channels 32 which are staggered with the corresponding oil outlet channel are in a non-communicated state, so that the condition that a plurality of oil outlet channels 23 are used for discharging oil simultaneously is avoided. As shown in fig. 5, the connection mode between any two adjacent sections of the valve core 3 can adopt a spigot butt joint and a connection structure for positioning and splicing by matching with the pin 6.

In some embodiments of the present invention, as shown in fig. 6, the present embodiment is different from the previous embodiment in that the valve seat 2 is of an integral structure instead of a split-type structure, and the valve core 3 is of a split-type structure.

In some embodiments of the present invention, as shown in fig. 7, the valve core 3 is different from the previous embodiment in that it adopts an integral structure instead of a segment-spliced structure.

In some embodiments of the present invention, as shown in fig. 8 and 9, the difference from the above embodiments is that the valve core segments of each segment are spliced coaxially, but the internal subchambers 31 thereof are not communicated. In fact, in this embodiment, each valve seat 2 and each valve core segment are the smallest working unit, that is, one valve seat 2 corresponds to one valve cavity 22, one valve core 3, one oil inlet channel 21 and one oil outlet channel 23, one first annular groove 34 and inlet, and one component oil channel 32. The minimum working units can be physically and coaxially spliced, but oil paths of the minimum working units are not communicated with each other, and the minimum working units are driven by the same stepping motor 1. As shown in fig. 9, two adjacent valve cores 3 are in plug-in fit by adopting a hexagonal rotation stopping structure 37.

In some embodiments of the present invention, as shown in fig. 2, the difference from the previous embodiment is that the grease inlet channel 21 of each valve seat 2 adopts a coaxial series structure, and the valve cores 3 of each valve seat 2 adopt parallel arrangement, so that compared with the previous embodiment, the volume of the present embodiment is more compact and small, the size of the valve core 3 is also significantly reduced, and especially, the axial size of the whole rotary distribution valve can be reduced. The system occupies a small area and has the effect of reducing the manufacturing cost.

In some embodiments of the present invention, as shown in fig. 1, a valve core 3 may be provided with a plurality of discharge lipid passages 23 correspondingly, which is different from the previous embodiment in that four rows are provided. The rotary distribution valve can be connected with a plurality of oil ducts, so that the application range of the rotary distribution valve is widened.

In some embodiments of the present invention, as shown in fig. 10, the difference from the above embodiment is that the one-component oil passage 32 of the valve element 3 includes two oil passages, and is coaxially disposed at an angle of 180 degrees.

In some embodiments of the present invention, as shown in fig. 11, the difference from the above embodiment is that the component oil passages 32 of the valve core 3 include six oil passages 32 circumferentially distributed, and any two oil passages have an included angle of 60 degrees. The advantage of this embodiment compared to the previous one is that the valve core 3 can be rotated by a smaller angle to achieve a connection with the lipid outlet channel 23.

In some embodiments of the present invention, as shown in fig. 12, the valve chamber 22 is tapered, the corresponding valve core 3 is also tapered, the upper and lower surfaces of the valve seat 2 are flat surfaces, and the circumferential surface is spherical.

In some embodiments of the present invention, as shown in fig. 13, the valve seat 2 is different from the previous embodiment in that it has a rectangular block-like structure as a whole.

In some embodiments of the present invention, as shown in fig. 14, the above embodiment is different in that the outer circumferential surface of the valve core 3 is provided with a permanent magnet 7, a hall sensor 8 capable of detecting the permanent magnet 7 is correspondingly provided on the valve seat 2, and when the permanent magnet 7 rotates with the valve core 3 to the sensing range of the hall sensor 8, the permanent magnet 7 can be detected by the hall sensor 8 to determine the state of the valve core 3. Compared with a mechanical limiting structure, the cooperation of the permanent magnet 7 and the corresponding Hall sensor 8 can be used for determining the zero point or the starting point position of the valve core 3 and determining the rotating state of the valve core 3 so as to determine and remove faults in time.

As shown in fig. 17, an embodiment of the present invention provides a control method of a centralized lubrication system, where the control method is applied to the centralized lubrication system as described above, and the control method includes:

Step S110, controlling the valve core 3 of the rotary distribution valve to rotate and acquiring the position of the outlet.

Step S120, controlling the valve core 3 of the rotary distribution valve to stop rotating according to the position control of the outlet so as to communicate the inlet with the outlet.

In this embodiment, during operation, the valve core 3 is first controlled to rotate, and the position of the outlet is acquired during rotation of the valve core 3. When the outlet position is obtained, the oil distribution channel 32 of the valve core 3 is communicated with the outlet, and the inlet is communicated with the outlet at the moment, so that the valve core 3 of the rotary distribution valve stops rotating, lubricating grease can flow from the inlet to the outlet, and the lubricating grease is injected, so that the distribution function is realized. Since the position of the outlet port is always detected during the rotation of the spool 3, even if a rotation error occurs after a plurality of rotations of the spool, it is possible to achieve precise communication of the branch oil passage 32 with the outlet port. Or the branch oil passage 32 can be accurately communicated with the outlet regardless of the initial position of the spool 3.

In some embodiments of the invention, a magnetic signaling device is provided at the outlet to emit a magnetic signal;

obtaining the exit location includes: detecting a magnetic signal, wherein the position of the magnetic signal is the position of the outlet.

In some embodiments, the magnetic signal device is a magnetic steel and the device for detecting the magnetic signal is a hall sensor.

In this embodiment, the position of the outlet is detected during the rotation of the valve core 3, and the magnetic steel is disposed at the outlet. In the working process, the valve core 3 rotates, at the moment, the Hall sensor cannot detect signals, when the oil distribution channel 32 and the outlet of the valve core 3 are communicated, the corresponding magnetic steel is exactly aligned with the center line of the detection range of the Hall element, the Hall sensor detects signals, the stepping motor 1 stops, and the valve core 3 stops rotating, so that lubricating grease flows from the inlet to the outlet. The magnetic signal is detected in the rotating process, so that the inlet and the outlet can be controlled to be communicated more accurately.

In some embodiments of the present invention, controlling rotation of the spool 3 of a rotary distribution valve includes: the direction of rotation of the spool 3 of the rotary distribution valve is controlled.

In this embodiment, for example, in operation, the valve element 3 is first controlled to rotate in a counterclockwise direction to switch the inlet and the outlet on, and when closed, the valve element 3 is controlled to rotate in a clockwise direction to switch the inlet and the outlet off. That is, the running track of the branch oil passage 32 of the valve element 3 is constant, so that the sealability of the branch oil passage 32 is enhanced, and leakage of grease is suppressed to a certain extent.

In some embodiments of the invention, after the inlet communicates with the outlet, further comprising:

it is determined whether the first rotation is stopped for a preset time.

If so, the spool 3 of the rotary distribution valve is controlled to reversely rotate for a second preset time.

In this embodiment, when the inlet and the outlet are turned on, the valve core 3 stops the first rotation for a preset time, after the first rotation for the preset time, the amount of grease required by the outlet is reached, and after the second rotation for the preset time, the valve core 3 is controlled to reversely rotate, the inlet and the outlet are disconnected. Due to the preset time, the grease is quantitative in each attack, too much grease is avoided, and the accuracy of the supply quantity of the grease is ensured. The second preset time then ensures that the spool 3 of the rotary distributor valve is turned back from the inlet and outlet on position to the preset position.

In some embodiments of the invention, the valve core 3 has an initial position provided with magnetic signaling means; after the inlet communicates with the outlet, further comprising:

it is determined whether the first rotation is stopped for a preset time.

If the valve element 3 of the rotary distribution valve is controlled to reversely rotate and the magnetic signal is acquired again, the valve element 3 of the rotary distribution valve is controlled to stop rotating so that the valve element 3 of the rotary distribution valve rotates to the initial position.

As can be seen from the above embodiments, the outlet is provided with a magnetic signal means which indicates that the inlet is in communication with the outlet when the hall sensor detects a magnetic signal when the rotary distribution valve is open. In this embodiment, when the inlet and the outlet are connected, the valve core 3 stops the first rotation for a preset time, and after the first rotation for a preset time, the amount of grease required by the outlet is reached, so as to control the valve core 3 to rotate reversely. And detects a magnetic signal during rotation, and when the magnetic signal is detected again, it indicates that the valve spool 3 at this time has been returned to the original position. The magnetic signal device is also arranged at the initial position, so that the valve core 3 can be reset after the work is completed.

In this embodiment, it is assumed that the rotary distribution valve has two outlets, a first outlet and a second outlet, respectively. When the rotary distribution valve is opened, the valve core 3 rotates anticlockwise, and when a magnetic signal is detected, the inlet is communicated with the first outlet. After a first preset time, the spool 3 rotates clockwise, indicating that the spool 3 reaches the initial position at this time when the magnetic signal is detected again. When it is necessary to dispense grease to the second outlet, the valve body 3 is rotated clockwise, and according to the detection signal, the inlet is connected to the second outlet, and grease is injected. After a preset time, the spool 3 rotates counterclockwise, and when a magnetic signal is detected, the spool 3 returns to the original position.

it is determined whether the first rotation is stopped for a preset time.

If so, the valve core 3 of the rotary distribution valve is controlled to continue to rotate for a third preset time.

In this embodiment, as shown in fig. 19, assuming that the rotary distribution valve has three outlets, namely, a first outlet, a second outlet and a third outlet, when the rotary distribution valve is opened and the first outlet needs to be communicated, the valve core 3 rotates clockwise, and when a magnetic signal is detected, the inlet is indicated to be communicated with the first outlet 231. After the first preset time, the spool 3 continues to rotate clockwise for a third preset time. When it is necessary to dispense grease to the second outlet, step S110 is performed, and when the magnetic signal is detected again, it is indicated that the inlet is connected to the second outlet 232, and after the grease injection to the second outlet is completed, the valve core 3 continues to rotate clockwise for a preset time. When it is necessary to dispense grease to the third outlet, step S110 is performed, and when the magnetic signal is detected again, it is indicated that the inlet is connected to the third outlet 233. After a preset time, the valve core 3 continues to rotate clockwise, and when the valve core rotates for a certain time, the valve core indicates that the inlet and the outlet are disconnected at the moment. At the moment, the valve core 3 only needs to do clockwise movement, frequent reciprocating operation is not needed, and the service life of the rotary distribution valve is prolonged.

In some embodiments of the present invention, as shown in fig. 18, the control method further includes:

step S130, the position of the outlet is acquired.

And step S140, according to the position of the outlet, the controller sends a control signal to a driving mechanism of the rotary distribution valve so as to control the valve core 3 of the rotary distribution valve to rotate, thereby realizing the on-off between the inlet and the outlet.

In this embodiment, the position of the outlet on the valve seat 2 is first obtained, and this outlet position can be obtained by looking up a table. After the position of the outlet is determined, the controller sends a control signal to the driving mechanism, the driving mechanism starts to start when receiving the control signal, and the driving mechanism drives the valve core 3 to rotate in the valve cavity of the valve seat 2. When the valve core 3 rotates to a position where the inlet is connected with the outlet, the connection between the inlet and the outlet is realized, so that the lubricating grease enters from the inlet of the valve seat 2 and flows out from the outlet of the valve seat 2. When the valve core 3 rotates to a position where the inlet and the outlet are staggered from each other, disconnection between the inlet and the outlet is achieved so that grease does not flow from the inlet of the valve seat 2 to the outlet of the valve seat 2. The rotation of the valve core 3 is controlled according to the specific position of the outlet, so that the connection position of the inlet and the outlet, namely the stop position of the valve core 3, can be more accurate. In addition, the process does not need manual participation, so that the valve core 3 rotates more accurately, and meanwhile, the manual participation is reduced, and the running cost is reduced.

In some embodiments of the invention, the control signal includes a rotational direction and a rotational angle of the stepper motor 1;

According to the position of the outlet, the controller sends a control signal to a driving mechanism of the rotary distribution valve to control the valve core 3 of the rotary distribution valve to rotate so as to realize the on-off between the inlet and the outlet, and the controller comprises:

the rotation direction and the rotation angle of the stepping motor 1 are controlled according to the position of the outlet, so that the valve core 3 of the rotary distribution valve is controlled to rotate, and the on-off between the inlet and the outlet is realized.

In some embodiments of the present invention, an angle sensor is installed on the rotary distribution valve, and in an initial state, the valve core 3 is at an initial position, first, the position of the outlet is detected, the rotation angle and direction of the valve core 3 when the oil distribution channel 32 is in butt joint with the outlet are memorized, the rotation angle is used as an opening angle, and the rotation direction is used as an opening direction. In the working process, the stepping motor 1 drives the valve core 3 at the initial position to rotate according to the opening direction and the opening angle so as to connect the inlet with the outlet. When the valve is closed, the stepping motor 1 drives the valve core 3 to rotate in the opposite direction to the opening direction, so that the valve core 3 returns to the initial position. Because the rotation angle and the rotation direction are memorized, the inlet and the outlet can be controlled to be communicated more accurately.

Or in other embodiments of the present invention, a pair of photoelectric pulse sensors or hall sensors are coaxially installed on the valve body 3 of the rotary distribution valve, and the valve body 3 is in an initial position in an initial state. Firstly, detecting pulse edges in the rotation process when the oil distribution channel 32 of the valve core 3 is in butt joint with an outlet, counting the pulse edges as the number of opening pulse edges, and memorizing the number of the pulse edges. In the working process, the stepping motor 1 drives the valve core 3 at the initial position to rotate, and the inlet and the outlet are communicated after the opening pulse edge times. When the valve is closed, the stepping motor 1 drives the valve core 3 to rotate in the opposite direction by the same number of pulse edges, so that the valve core 3 returns to the initial position.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A rotary distribution valve, at least suitable for lubrication systems with grease as a lubrication medium, comprising at least one valve unit, said valve unit comprising:

2. The rotary distribution valve according to claim 1, further comprising:

And a seal disposed between the valve seat and the valve spool and at least between at least one of the inlet and at least one of the outlet.

3. The rotary distribution valve according to claim 2, wherein,

In case there are at least two of said outlets, said seal is also located at least between at least two of said outlets.

4. The rotary distributor valve according to claim 1, wherein said valve seat is provided with at least one inlet and at least one outlet, one of said inlet communicating with one of said inlets; one of said lipid outlet channels communicates with one of said outlets; the valve seat comprises at least one valve cavity, and each valve cavity is internally provided with the valve core; the shape of the valve core is matched with the shape of the valve cavity; the valve core further comprises at least one oil dividing passage which is arranged in the valve core along the radial direction and communicated with the subchamber, and the subchamber is provided with a subchamber inlet; the valve core has a working valve position and a rest valve position when rotating in the valve cavity;

5. The rotary distribution valve according to claim 4, wherein,

In one valve cavity, when the valve core is in the working state, one subchamber is communicated with one grease outlet passage only through one grease distribution passage.

6. The rotary distribution valve according to claim 5, wherein,

In each valve cavity of one valve unit, each subchamber of the valve core is communicated with one grease outlet channel only through one grease distribution channel at the same time.

7. The rotary distribution valve according to claim 4, wherein,

At least two oil distribution channels are arranged on the valve core, and at least two oil distribution channels are arranged at intervals along the circumferential direction of the valve core.

8. A dispensing device, comprising:

A rotary distribution valve according to any one of claims 1 to 7;

9. A centralized lubrication system comprising a lubrication pump and at least one dispensing device as claimed in claim 8.

10. A control method of a centralized lubrication system, wherein the control method is applied to the centralized lubrication system as set forth in claim 9, the control method comprising: