CN113551142A - Oil circuit pressure regulating control device of centralized lubrication oil feeding system - Google Patents
Oil circuit pressure regulating control device of centralized lubrication oil feeding system Download PDFInfo
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- CN113551142A CN113551142A CN202110780550.XA CN202110780550A CN113551142A CN 113551142 A CN113551142 A CN 113551142A CN 202110780550 A CN202110780550 A CN 202110780550A CN 113551142 A CN113551142 A CN 113551142A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
- F16N29/02—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems for influencing the supply of lubricant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2250/00—Measuring
- F16N2250/04—Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2270/00—Controlling
- F16N2270/60—Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2270/00—Controlling
- F16N2270/70—Supply
- F16N2270/72—Supply on-off
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The oil circuit pressure regulating control device of the centralized lubricating oil feeding system comprises a pump shell, a power input assembly, a plunger assembly, an overflow valve assembly, a pressure relief valve assembly and a controller; the oil circuit pressure regulating control device integrates a pump shell, a power input assembly, a plunger assembly, an overflow valve assembly, a pressure relief valve assembly and a controller, can automatically control intermittent oil supply according to signals in the device, and can maintain pressure of the whole oil supply pipeline for effective time according to signals provided by an oil pressure sensor, so that lubricating oil in an oil circuit can fully reach lubricating points in each branch, and the pressure relief valve assembly is actively controlled by the controller to complete timely and effective pressure relief action; this scheme has simple and convenient feasible, good reliability's advantage, and applicable plunger pump oil feeding system in any conventionality.
Description
Technical Field
The invention relates to the technical field of centralized lubrication, in particular to an oil way pressure regulating control device of a centralized lubricating oil feeding system.
Background
At present, the grease centralized lubrication technology is mainly applied to the fields of large vehicles, engineering machinery, wind power generation, industrial production and the like. The function is to pump the grease to the lubricating point automatically according to the need through the oil pump to satisfy the lubricating requirement of the corresponding kinematic pair. The centralized lubricating oil feeding system overcomes the defects of the traditional manual lubrication, can provide lubrication at regular time, fixed point and fixed quantity when the machine works, greatly reduces the abrasion of parts, greatly reduces the using amount of lubricating oil agent, reduces the loss of the parts and the time for maintenance and repair while protecting the environment and saving energy, and finally achieves the best effect of improving the operating income.
In the lubricating process, the plunger pump supplies oil and pressurizes to the pipeline continuously when working, the oil pressure of the pipeline can be controlled by the preset pressure of the overflow valve, when the pressure exceeds the preset pressure, the grease can return to the oil tank through the overflow valve, the preset pressure is still kept in the pipeline, and in order to thoroughly unload the load, an unloading mechanism is required to completely unload the oil pressure pipeline. The conventional unloading mechanism is completed by an electromagnetic valve, and program-controlled pressure relief is carried out by the electromagnetic valve by opening a bypass serially connected with a pilot electromagnetic valve. When the electromagnetic valve is used for releasing pressure of the grease pump, the problem that the grease around the electromagnetic valve core is diluted and flows away more easily due to the fact that the electromagnetic valve core heats in operation, and some solidified substances are stuck on the valve core over time to cause incomplete pressure releasing of the electromagnetic valve is generally solved.
Disclosure of Invention
In order to solve the technical problem, the invention provides an oil way pressure regulating control device of a centralized lubricating oil supply system.
The technical scheme adopted by the invention is as follows: the oil circuit pressure regulating control device of the centralized lubricating oil feeding system comprises a pump shell, a power input assembly, a plunger assembly, an overflow valve assembly, a pressure relief valve assembly and a controller; the pump shell is provided with a cavity for storing lubricating grease, the power input assembly provides power to pump the grease in the pump cavity into the oil supply pipeline through the plunger assembly, the overflow valve assembly and the pressure relief valve assembly are sequentially arranged on the oil supply pipeline, the oil pressure sensor is further arranged on the oil supply pipeline, and the signal output end of the oil pressure sensor is connected with the controller;
the power input assembly comprises a driving motor, an input shaft, a plunger cam arranged on the input shaft and rotating synchronously with the input shaft, and a pressure relief cam arranged on the input shaft through a one-way bearing, wherein the plunger cam is connected with a valve core of the plunger assembly; when the pressure in the oil supply pipeline reaches a preset pressure value of the oil pressure sensor, the oil pressure sensor outputs a signal to the controller, and the controller outputs a signal for maintaining the pressure of the oil supply pipeline;
the pressure relief valve assembly comprises a pressure relief valve core, a valve core spring sleeved on the pressure relief valve core, a valve body and a mechanical switch used for triggering signals, the signals of the mechanical switch are output to the controller, the pressure relief valve core is arranged on one side of the pressure relief cam and is in contact with the pressure relief cam, when the controller gives a reverse instruction to the driving motor, the driving motor drives the pressure relief cam to rotate through the input shaft, the pressure relief cam drives the pressure relief valve core to move, so that a pressure relief hole in the pressure relief valve core is aligned with an oil return hole in the valve body, and pressure relief action is started; meanwhile, the mechanical switch is switched on, a pressure relief starting signal is sent to the controller, the controller starts to perform pause countdown, the plunger assembly is controlled to stop pumping oil into the oil supply pipeline within pause time, and after the pause countdown is finished, the controller closes the pressure relief pipeline.
Preferably, the plunger assembly comprises a plunger valve core, a plunger valve body and a plunger pressure spring sleeved on the plunger valve core, an oil suction hole is formed in the plunger valve body, power for reciprocating motion is provided for the plunger valve core through a plunger cam and the plunger pressure spring, and oil in the pump cavity enters the valve core through the oil suction hole in the plunger valve body and then is pushed into the oil supply pipeline.
As a preferred scheme, the overflow valve assembly comprises an overflow valve body, an overflow valve core and a pressure regulating mechanism, one end of the pressure regulating mechanism is connected with the overflow valve core, the pressure regulating mechanism is used for regulating the preset pressure in the overflow valve assembly, an overflow hole is formed in the overflow valve core, and a backflow ring groove with the backflow hole is formed in the overflow valve body.
As the preferred scheme, pressure regulating mechanism including setting up spring holder, pressure regulating spring and the pressure regulating screw in overflow valve body cavity, pressure regulating spring's one end is connected on the spring holder, and the other end is connected on the overflow valve core, carries out the adjustment of predetermineeing the pressure size through knob pressure regulating screw.
Preferably, the pressure relief cam is arranged on the input shaft through a one-way bearing, so that the pressure relief cam cannot be driven to rotate by the driving motor when the driving motor rotates forwards to drive the plunger cam to act.
Preferably, the mechanical switch comprises a conducting strip arranged in a valve body of the pressure relief valve component and a contact corresponding to the conducting strip, when the pressure relief cam drives the pressure relief valve core to act, the conducting strip acts synchronously with the pressure relief valve core and is conducted with the contact, and the conducting signal is led out to the controller through the binding post.
Preferably, a valve body of the pressure relief valve assembly is internally provided with an internal valve core, the conducting strip is arranged at the end of the internal valve core, and when the pressure relief cam drives the pressure relief valve core to act, the pressure relief valve core drives the internal valve core to move, so that the conducting strip acts synchronously and is communicated with the contact.
Preferably, a top core spring is further sleeved on the valve inner top core, when the controller closes the pressure relief pipeline, the valve inner top core automatically resets under the action of the top core spring, the conducting strip is separated from the contact, and a closing signal is led out through the wiring terminal.
As a preferred scheme, a sealing sleeve is further sleeved on the valve inner ejection core, one end of the sealing sleeve abuts against one side face of the ejection core spring, when the valve core spring drives the pressure relief valve core to reset, the valve inner ejection core automatically resets under the action of the ejection core spring, and the sealing sleeve synchronously moves along with the valve inner ejection core and closes a channel of the oil supply pipeline for discharging oil to the pressure relief valve core.
The invention has the beneficial effects that:
according to the scheme, through an innovative structural design, the structural composition of an oil way pressure regulating control module of a centralized lubricating oil feeding system is optimized, and an oil way pressure regulating control device integrating a pump shell, a power input assembly, a plunger assembly, an overflow valve assembly, a pressure relief valve assembly and a controller into a whole is realized, the device can automatically control intermittent oil supply according to signals in the device, and can perform effective time pressure maintaining on the whole oil supply pipeline according to signals provided by an oil pressure sensor, so that lubricating oil in an oil way can fully reach lubricating points in each branch, and meanwhile, when pressure relief is needed, a driving motor can drive a pressure relief cam to rotate through an input shaft when a reverse instruction is given to the driving motor through the controller, the pressure relief cam drives the pressure relief valve core to move, so that a pressure relief hole in the pressure relief valve core is aligned with an oil return hole in a valve body, and pressure relief action is started; meanwhile, the mechanical switch is switched on, a signal for starting pressure relief is sent to the controller, the controller starts to perform pause countdown, the plunger assembly is controlled to stop pumping oil into the oil supply pipeline within pause time, and the controller closes the pressure relief pipeline after the pause countdown is finished, so that the scheme has the advantages of simplicity, convenience, feasibility and good reliability, and can be applied to any conventional plunger pump oil supply system;
the invention also has the following technical advantages:
one of them, in this scheme, be equipped with the plunger subassembly in the hydraulic pressure oil circuit, the overflow valve subassembly, pressure relief valve subassembly and oil pressure sensor, the controller passes through signal automatic control intermittent type nature fuel feeding to above-mentioned subassembly, and according to the signal that oil pressure sensor provided, carry out the pressurize of active time to whole fuel feeding pipeline, wherein oil pressure sensor is used for output signal to give the controller, better calculate the dwell time, make the lubricating oil in the oil circuit can be abundant arrive the lubricating point in each branch road, by the whole judgement of controller and control pressure relief time and rest time, rather than independent reliance oil pressure sensor, have the advantage of good reliability.
Secondly, in this scheme, in the input shaft subassembly, including driving motor, the input shaft, set up the plunger cam along with input shaft synchronous rotation on the input shaft and set up the release cam on the input shaft through one-way bearing, when realizing driving motor corotation, drive plunger subassembly action by the plunger cam and realize that grease constantly pumps into in the oil supply pipeline, at this moment, the release cam does not rotate, when needs release, the controller gives driving motor a reversal signal, make the high dead center of release cam and the contact of release case, with the case top to the position of release, the device has the convenient advantage of control.
In the third, in this scheme, when the condition of superpressure appears in the fuel feeding pipeline, the grease can automatic back-open overflow valve subassembly, returns the pump intracavity through overflow valve subassembly's oil gallery, wherein still is equipped with pressure regulating mechanism in this overflow valve subassembly, and pressure regulating mechanism's one end is connected with the overflow valve core, presets the size of pressure in the adjustment overflow valve subassembly through pressure regulating mechanism, can conveniently use with the controller is supporting, and it is very convenient to adjust and predetermine the pressure size.
Fourthly, in the scheme, a mechanical switch which is composed of a conducting strip and a contact and used for triggering signals is arranged in the pressure relief valve component, the time of sending signals by the mechanical switch is synchronous with the time of starting pressure relief of the pressure relief valve component, meanwhile, in order to better realize the control process, the conducting strip is arranged at the end part of a top core in the valve, when a pressure relief cam drives a pressure relief valve core to act, the pressure relief valve core drives the top core in the valve to move, and leads the conducting strip to act synchronously and be communicated with the contact, a top core spring is also sleeved on the top core in the valve, when a controller closes a pressure relief pipeline, the top core in the valve automatically resets under the action of the top core spring, and separates the conducting strip from the contact, a closing signal is led out through a binding post, secondly, in order to better close a pressure relief channel, a sealing sleeve is also sleeved on the top core in the valve, one end of the sealing sleeve is tightly propped against one side surface of the top core spring, when the valve core spring drives the pressure relief valve core to reset, the valve inner ejection core automatically resets under the action of the ejection core spring, the sealing sleeve synchronously moves along with the valve inner ejection core and closes a channel of the oil supply pipeline for discharging oil to the pressure relief valve core, and the structure has the advantage of good reliability.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a top view of the present invention;
fig. 3 is a structural sectional view of the relief valve assembly of the present invention.
FIG. 4 is a cross-sectional view of the plunger assembly of the present invention;
FIG. 5 is a cross-sectional structural view of the pressure relief valve assembly of the present invention.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that: unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the description and claims of the present invention are not to be construed as limiting in number, but rather as indicating the presence of at least one. The word "comprise" or "comprises", and the like, indicates that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, but does not exclude other elements or items having the same function.
The detailed structure of the present solution is described below with reference to the accompanying fig. 1-5:
as shown in fig. 1 and 2, the oil path pressure regulating control device of the centralized lubrication oil supply system mainly comprises a pump housing 1, a power input assembly 2, a plunger assembly 3, an overflow valve assembly 4, a pressure relief valve assembly 5, an oil pressure sensor 6 and a controller connected with the oil pressure sensor; the pump shell 1 is provided with a cavity for storing lubricating grease, the grease in the portable oil box is pressed into the pump cavity through an oil guide pipe and a pressure oil disc assembly, the power input assembly 2 provides power to pump the grease in the pump cavity into an oil supply pipeline 12 through a plunger assembly 3, the overflow valve assembly 4, the pressure relief valve assembly 5 and the oil pressure sensor 6 are sequentially arranged on the oil supply pipeline 12, and the signal output end of the oil pressure sensor 6 is connected with a controller;
the power input assembly 2 includes a driving motor, an input shaft 21, a plunger cam 22 disposed on the input shaft 21 and rotating synchronously with the input shaft, and a pressure relief cam 23 disposed on the input shaft through a one-way bearing, and it should be noted that: the parts of the driving motor are not shown in the drawing, the connection mode of the driving motor and the input shaft is the existing mature structure, and are not described one by one, the plunger cam 22 is connected with the plunger valve core 31 of the plunger assembly 3, when the driving motor rotates forwards, the power input shaft 21 drives the plunger valve core 31 in the plunger assembly to reciprocate through the coaxial plunger cam 22, wherein the return power of the plunger valve core 31 is provided by the plunger pressure spring 32 sleeved on the valve core, the oil in the pump cavity enters the plunger valve core 31 through the oil suction hole 331 on the plunger valve body 33 and then is pushed into the oil supply pipeline 12, under the action of the continuous reciprocating motion of the plunger valve core 31, the oil is continuously pumped into the oil supply pipeline 12, when the preset value of the oil pressure sensor 6 is reached, the oil pressure sensor 6 transmits a signal to the controller, the controller performs pressure maintaining countdown, the pressure maintaining function is to ensure that the oil is sufficiently conveyed to the lubricating points in the oil supply pipeline 12, setting the pressure maintaining time according to the actual condition of the total length of the pipeline;
in the pressure maintaining time, if the pressure in the oil supply pipeline 12 is over-pressure, that is, the pressure in the oil supply pipeline 12 exceeds the preset pressure value of the overflow valve assembly 4, the grease in the oil supply pipeline 12 will push the overflow valve assembly 4 open, and flow back into the pump housing 1 through the oil return hole on the overflow valve assembly 4;
after the pressure holding countdown is finished, the controller gives a reversal signal to the driving motor, the input shaft 21 reverses for a half circle, the pressure relief cam 23 fixed on the input shaft 21 pushes the pressure relief valve core 51 of the pressure relief valve assembly 5 to move in the rotating process, at the moment, the high dead center of the pressure relief cam 23 on the pressure relief assembly 5 is contacted with the pressure relief valve core 51, the pressure relief valve core 51 is jacked to a pressure relief position, at the moment, a pressure relief hole 511 on a pressure relief valve body 52 on the pressure relief valve core 51 is aligned with an oil return hole 521 on the pressure relief valve body 52, the pressure relief action is started, meanwhile, a mechanical switch 53 on the pressure relief assembly is switched on, a signal for starting pressure relief is sent to the controller through a lead led out by a wiring terminal 531, and the controller starts to perform pause countdown;
in the pressure relief process, grease in the oil supply pipeline 12 returns to the pump shell 1 through the middle pressure relief hole 511 of the pressure relief valve core 51 and the oil return hole 521 of the pressure relief valve body in sequence, and at the moment, the oil supply pipeline 12 realizes complete pressure relief. Even though the plunger assembly 4 pumps oil to the supply line 12 during this process, the pressure relief line is open and therefore does not pressurize the line. After the pause countdown is finished, the controller starts to send out an oil pumping command, firstly, the pressure relief pipeline is closed, and the actions are as follows: firstly, giving a signal of a reverse rotation half-circle to the driving motor, rotating the input shaft 21 to enable the low dead point of the pressure relief cam 23 to contact the pressure relief valve core 51, and at the moment, disengaging a pressure relief hole 511 on the pressure relief valve core from an oil return hole 521 of the pressure relief valve body, and closing the pipeline; after the pressure relief pipeline is closed, a signal for positive rotation of the motor is sent, and oil is continuously pumped into the oil supply pipeline 12.
In the embodiment, because the pressure relief cam 23 is connected with the power input shaft 21 by adopting the one-way bearing, the structure realizes that the driving motor can not drive the pressure relief cam 23 to rotate when the driving motor rotates forwards to drive the plunger cam 22 to act.
As shown in fig. 3, the overflow valve assembly 4 includes an overflow valve body 42, an overflow valve core 41 and a pressure regulating mechanism, one end of the pressure regulating mechanism is connected to the overflow valve core 41, the pressure regulating mechanism regulates the preset pressure in the overflow valve assembly, an overflow hole 411 is arranged on the overflow valve core 41, a return ring groove 421 with a return hole is arranged in the overflow valve body 42, the pressure regulating mechanism includes a spring seat 45, a pressure regulating spring 43 and a pressure regulating screw 44 which are arranged in the cavity of the overflow valve body, one end of the pressure regulating spring 43 is connected to the spring seat 45, the other end is connected to the overflow valve core 41, and the preset pressure is regulated by the knob pressure regulating screw 43;
when the oil pressure in the oil supply pipeline 12 exceeds the preset pressure value set by the pressure regulating mechanism, the overflow valve core 41 is pushed outwards, the pressure of the pressure regulating spring 43 is overcome, the overflow hole 411 on the overflow valve core 41 is gradually aligned with the return ring groove 421 on the overflow valve body 42, the return hole is formed in the ring groove 421, and the grease sequentially flows into the pump shell through the overflow valve core 41, the overflow hole 411, the return ring groove 421 and the return hole to finish the return.
As shown in fig. 4, the oil supply process of the plunger assembly in the present solution is a conventional flow, and the present solution is not optimized, and the specific structure thereof is roughly as follows: the plunger assembly 3 comprises a plunger valve core 31, a plunger valve body 33 and a plunger pressure spring 32 sleeved on the plunger valve core 31, an oil suction hole 331 is formed in the plunger valve body 33, reciprocating power is provided for the plunger valve core 31 through a plunger cam 22 and the plunger pressure spring 32, and oil in a pump cavity enters the valve core through the oil suction hole 331 in the plunger valve body 33 and then is pushed into the oil supply pipeline 12.
As shown in fig. 5, the pressure relief valve assembly 5 includes a pressure relief valve core 51, a valve core spring 53 sleeved on the pressure relief valve core, a valve body 52, a valve inner top core 54, and a mechanical switch for triggering a signal, where the mechanical switch is composed of a conducting strip 57 arranged at an end of the valve inner top core 54 and a contact 53 arranged corresponding to the conducting strip, the valve inner top core 54 is further sleeved with a top core spring 55, and when the controller closes the pressure relief pipeline, the valve inner top core 54 automatically resets under the action of the top core spring 55; when the high dead point of the pressure relief cam 23 is contacted with the pressure relief valve core 51, the valve core pressure relief oil hole 511 is superposed with the oil return hole 521 on the valve body, at this time, the pressure relief oil hole 511 is connected with the oil supply pipeline 12 through an oil passage formed in the pressure relief valve core 51, the oil passage starts to relieve pressure, and at this time, the conducting strip 57 conducts the contact 56. The conduction signal is led out through the wiring terminal 531 and transmitted to the controller;
when pressure relief is not needed, the pressure relief cam 23 rotates reversely for a half circle, the low dead center of the pressure relief cam is contacted with the pressure relief valve core 51, and under the action of the valve core spring 53, the valve core spring 53 drives the pressure relief valve core 51 to move left, so that the pressure relief oil hole 511 is closed. At the same time, the valve inner top core 54 closes the oil discharging passage from the oil supply line 12 to the pressure relief valve core 511 under the action of the top core spring 55. At the same time as the conductive tab 57 disengages the contact 56. The close signal is led out through the wiring terminal 531 and transmitted to the controller.
In this embodiment, the valve inner top core 54 is further sleeved with a sealing sleeve 58, one end of the sealing sleeve 58 is tightly pressed against one side surface of the top core spring 55, when the valve core spring drives the pressure relief valve core to reset, the valve inner top core automatically resets under the action of the top core spring, and the sealing sleeve 58 synchronously moves along with the valve inner top core 54 and closes a passage of the oil supply pipeline to discharge oil to the pressure relief valve core.
In this scheme, utilize above-mentioned device to carry out the control method of pressure regulating to whole oil supply pipeline, the step is as follows:
step one, in the working process of the centralized lubrication oil feeding system, a controller outputs signals, grease in a pump cavity is pumped into an oil supply pipeline through a plunger assembly, when the pressure in the oil supply pipeline is greater than the preset value of an oil pressure sensor, the oil pressure sensor outputs signals to the controller of the centralized lubrication oil feeding system, and when the controller receives the signals, the controller maintains the pressure of the oil supply pipeline for a certain time;
step two, in the pressure maintaining time, if the pressure in the oil supply pipeline exceeds the set pressure threshold value of the overflow valve assembly, an oil return hole of the overflow valve is opened, and the grease returns to the pump cavity through the overflow valve;
step three, when the controller detects that the pressure maintaining time is over, a reverse signal is given to the driving motor, the driving motor acts, a valve core of the pressure relief valve assembly is driven to act through the input shaft and the pressure relief cam in sequence, a pressure relief hole in the valve core of the pressure relief valve is aligned with an oil return hole in the valve body, and pressure relief action is started; meanwhile, a mechanical switch on the pressure relief valve assembly is switched on, a pressure relief starting signal is sent to the controller, the controller starts to perform pause countdown, the plunger assembly is controlled to stop pumping oil into the oil supply pipeline in pause time, and after the pause countdown is finished, the controller closes the pressure relief pipeline and pressure relief is finished;
and step four, after the pressure relief pipeline is closed, a signal for driving the motor to rotate forwards is given, and oil is continuously pumped into the oil supply pipeline.
It should be noted that while the invention has been described in terms of the above-mentioned embodiments, other embodiments are also possible. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended that all such changes and modifications be covered by the appended claims and their equivalents.
Claims (9)
1. Oil circuit pressure regulating control device of centralized lubrication oil feeding system, its characterized in that: the pump comprises a pump shell, a power input assembly, a plunger assembly, an overflow valve assembly, a pressure relief valve assembly and a controller; the pump shell is provided with a cavity for storing lubricating grease, the power input assembly provides power to pump the grease in the pump cavity into the oil supply pipeline through the plunger assembly, the overflow valve assembly and the pressure relief valve assembly are sequentially arranged on the oil supply pipeline, the oil pressure sensor is further arranged on the oil supply pipeline, and the signal output end of the oil pressure sensor is connected with the controller;
the power input assembly comprises a driving motor, an input shaft, a plunger cam arranged on the input shaft and rotating synchronously with the input shaft, and a pressure relief cam arranged on the input shaft through a one-way bearing, wherein the plunger cam is connected with a valve core of the plunger assembly; when the pressure in the oil supply pipeline reaches a preset pressure value of the oil pressure sensor, the oil pressure sensor outputs a signal to the controller, and the controller outputs a signal for maintaining the pressure of the oil supply pipeline;
the pressure relief valve assembly comprises a pressure relief valve core, a valve core spring sleeved on the pressure relief valve core, a valve body and a mechanical switch used for triggering signals, the signals of the mechanical switch are output to the controller, the pressure relief valve core is arranged on one side of the pressure relief cam and is in contact with the pressure relief cam, when the controller gives a reverse instruction to the driving motor, the driving motor drives the pressure relief cam to rotate through the input shaft, the pressure relief cam drives the pressure relief valve core to move, so that a pressure relief hole in the pressure relief valve core is aligned with an oil return hole in the valve body, and pressure relief action is started; meanwhile, the mechanical switch is switched on, a pressure relief starting signal is sent to the controller, the controller starts to perform pause countdown, the plunger assembly is controlled to stop pumping oil into the oil supply pipeline within pause time, and after the pause countdown is finished, the controller closes the pressure relief pipeline.
2. The oil passage pressure-regulating control device of the centralized lubricating oil-feeding system according to claim 1, characterized in that: the plunger assembly comprises a plunger valve core, a plunger valve body and a plunger pressure spring sleeved on the plunger valve core, an oil suction hole is formed in the plunger valve body, power for reciprocating motion is provided for the plunger valve core through a plunger cam and the plunger pressure spring, and oil in the pump cavity enters the valve core through the oil suction hole in the plunger valve body and then is pushed into the oil supply pipeline.
3. The oil passage pressure-regulating control device of the centralized lubricating oil-feeding system according to claim 1, characterized in that: the overflow valve assembly comprises an overflow valve body, an overflow valve core and a pressure regulating mechanism, wherein one end of the pressure regulating mechanism is connected with the overflow valve core, the pressure regulating mechanism regulates the size of preset pressure in the overflow valve assembly, an overflow hole is formed in the overflow valve core, and a backflow ring groove with a backflow hole is formed in the overflow valve body.
4. The oil passage pressure-regulating control device of the centralized lubricating oil-feeding system according to claim 3, characterized in that: the pressure regulating mechanism comprises a spring seat, a pressure regulating spring and a pressure regulating screw which are arranged in the overflow valve body cavity, one end of the pressure regulating spring is connected to the spring seat, the other end of the pressure regulating spring is connected to the overflow valve core, and the pressure regulating mechanism is used for adjusting the preset pressure through the knob pressure regulating screw.
5. The oil passage pressure-regulating control device of the centralized lubricating oil-feeding system according to claim 1, characterized in that: the pressure relief cam is arranged on the input shaft through the one-way bearing, so that the pressure relief cam cannot be driven to rotate by the driving motor when the driving motor rotates forwards to drive the plunger cam to act.
6. The oil passage pressure-regulating control device of the centralized lubricating oil-feeding system according to claim 1, characterized in that: the mechanical switch is composed of a conducting strip arranged in a valve body of the pressure relief valve component and a contact corresponding to the conducting strip, when the pressure relief cam drives the pressure relief valve core to act, the conducting strip acts synchronously along with the pressure relief valve core and is communicated with the contact, and a communication signal is led out to the controller through the wiring terminal.
7. The oil passage pressure-regulating control device of the centralized lubricating oil-feeding system according to claim 6, characterized in that: the pressure relief valve assembly is characterized in that a valve inner ejecting core is further arranged in a valve body of the pressure relief valve assembly, the conducting strip is arranged at the end part of the valve inner ejecting core, and when the pressure relief cam drives the pressure relief valve core to move, the pressure relief valve core drives the valve inner ejecting core to move, so that the conducting strip synchronously moves and is communicated with the contact.
8. The oil passage pressure-regulating control device of the centralized lubricating oil-feeding system according to claim 7, characterized in that: the valve inner ejection core is further sleeved with an ejection core spring, when the controller closes the pressure relief pipeline, the valve inner ejection core automatically resets under the action of the ejection core spring, the conducting strip is separated from the contact, and a closing signal is led out through the wiring terminal.
9. The oil passage pressure-regulating control device of the centralized lubricating oil-feeding system according to claim 7, characterized in that: the valve inner ejection core is further sleeved with a sealing sleeve, one end of the sealing sleeve abuts against one side face of the ejection core spring, when the valve core spring drives the pressure relief valve core to reset, the valve inner ejection core automatically resets under the action of the ejection core spring, and the sealing sleeve moves synchronously along with the valve inner ejection core and closes a channel of the oil supply pipeline for oil unloading of the pressure relief valve core.
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| CN202110780550.XA CN113551142A (en) | 2021-07-10 | 2021-07-10 | Oil circuit pressure regulating control device of centralized lubrication oil feeding system |
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| CN202110780550.XA CN113551142A (en) | 2021-07-10 | 2021-07-10 | Oil circuit pressure regulating control device of centralized lubrication oil feeding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419812A (en) * | 2022-08-29 | 2022-12-02 | 中国煤炭科工集团太原研究院有限公司 | Quick automatic grease filling lubricating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419812A (en) * | 2022-08-29 | 2022-12-02 | 中国煤炭科工集团太原研究院有限公司 | Quick automatic grease filling lubricating device |
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