CN116771627A - Pneumatic plunger pump - Google Patents

Pneumatic plunger pump Download PDF

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Publication number
CN116771627A
CN116771627A CN202210219482.4A CN202210219482A CN116771627A CN 116771627 A CN116771627 A CN 116771627A CN 202210219482 A CN202210219482 A CN 202210219482A CN 116771627 A CN116771627 A CN 116771627A
Authority
CN
China
Prior art keywords
plunger
cylinder
oil
plunger pump
pneumatic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210219482.4A
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Chinese (zh)
Inventor
周荣玺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Haifule Fluid Technology Co ltd
Original Assignee
Beijing Haifule Fluid Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Haifule Fluid Technology Co ltd filed Critical Beijing Haifule Fluid Technology Co ltd
Priority to CN202210219482.4A priority Critical patent/CN116771627A/en
Publication of CN116771627A publication Critical patent/CN116771627A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/125—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The application provides a pneumatic plunger pump, which comprises a cylinder, a plunger and an oil cylinder; the device also comprises a middle block and a one-way valve; the cylinder, the middle block and the oil cylinder are connected in sequence; the cylinder comprises a front air hole, a rear air hole and a piston; the front air hole and the rear air hole are respectively positioned at two ends of the piston stroke in the cylinder; a plunger cavity, an oil inlet channel and an oil outlet channel are arranged in the oil cylinder; the oil inlet channel is communicated with the middle part of the plunger cavity; one end of the one-way valve is communicated with the tail part of the plunger cavity, and the other end of the one-way valve is communicated with the oil outlet channel, so that liquid is permitted to flow from the tail part of the plunger cavity to the oil outlet channel under set pressure; the plunger passes through the intermediate block, one end of the plunger is connected with the piston along the axis, and the other end of the plunger extends into the plunger cavity from the head along the axis. The pneumatic plunger pump improves the oil absorption and pumping force of the plunger under the same compressed air pressure, improves the upper limit of the reciprocating frequency of the plunger, and can keep a clean working state for a long time.

Description

Pneumatic plunger pump
Technical Field
The patent relates to a pneumatic plunger pump, especially a pneumatic plunger pump of full enclosed construction preconditioning stroke in equipment self-lubricating field.
Background
In the field of modern manufacturing, high speed bearings are commonly used. When the DN value of the main shaft bearing exceeds 2000000, the common grease lubrication is difficult to meet the lubrication requirement. The oil-gas lubrication device can convey the precisely metered lubricating oil and the compressed air with required pressure to the high-speed bearing, so that the friction force of the bearing is reduced, the running temperature of the bearing is reduced, the service life of the bearing is prolonged, and the fault shutdown time is reduced. Meanwhile, the positive pressure compressed air prevents foreign matters from entering the bearing cavity.
The metering device of the lubricating oil is a core component of an oil-gas lubrication system. Typical high speed bearings require a lubrication oil level of about 1ml-2 ml/hr. The metering device therefore pumps oil typically 20-60 times per hour, with an amount of oil pumped each time of around 0.05 ml. Although the volume of oil pumped is small each time, the high speed bearings can be damaged within minutes when the oil and gas lubrication device fails. Each pumping must be monitored.
The prior high-speed bearing lubrication technology is commonly used for two schemes of a miniature pneumatic plunger pump and a plunger distributor. The miniature pneumatic plunger pump generally adopts compressed air to drive a plunger to move so as to pump oil liquid and compress a return spring, and the plunger is reset by the resilience of the return spring after moving to a set position on a stroke, so that a reciprocating working stroke is completed. And a probe rod connected with the plunger is arranged at the same time, and the plunger drives the probe rod to move. The probe rod extends out of the pump body, and triggers a proximity switch arranged outside the pump body, so that the action monitoring of the oil pump is realized. And the other end of the plunger is provided with an adjusting knob for adjusting the stroke of the plunger, so as to adjust the oil outlet quantity of each pumping.
Above-mentioned pump body structure, micropump part is more, and micropump fault rate is high in practical application, appears the micropump easily and blocks because of the pollution in the adverse circumstances, the oil leak scheduling problem, causes equipment to shut down. Problems with such micropumps include: by adopting a spring reset structure, in the oil pumping stroke, the cylinder must firstly compress the spring, and part of the thrust of the cylinder is consumed, so that the cycle time of the oil pumping section is prolonged; in the spring resetting process, the spring force pushes the plunger to retract, vacuum degree is generated, lubricating oil is sucked, the retracting speed is low due to the limitation of the elastic coefficient of the spring, and the oil absorption capacity is poor, so that the installation position of the lubricating oil tank is required to be higher than that of the miniature plunger pump; because the two ends of the plunger are respectively connected with the stroke adjusting mechanism and the probe rod detecting mechanism which extend out of the pump body, the plunger is sealed by adopting a sealing element; when the environment is severe, foreign matters adhere to the probe rod, the sealing ring is damaged, and air leakage and oil leakage are caused.
The plunger distributor is provided with a lubricating oil pump, and when the lubricating oil pump works, the pressure of an oil way rises to push the plunger to act. The plunger dispenser may be provided with a monitoring element connected to the plunger, but the stroke of the plunger is difficult to adjust.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a pneumatic plunger pump which comprises a cylinder, a plunger and an oil cylinder; meanwhile, the device also comprises a middle block and a one-way valve;
the cylinder, the middle block and the oil cylinder are sequentially connected;
the cylinder comprises a front air hole, a rear air hole and a piston; the front air hole and the rear air hole are respectively positioned at two ends of the piston stroke in the cylinder;
a plunger cavity, an oil inlet channel and an oil outlet channel are arranged in the oil cylinder; the oil inlet channel is communicated with the middle part of the plunger cavity; one end of the one-way valve is communicated with the tail part of the plunger cavity, and the other end of the one-way valve is communicated with the oil outlet channel, so that liquid is permitted to flow from the tail part of the plunger cavity to the oil outlet channel under set pressure;
the plunger passes through the intermediate block, one end of the plunger is connected with the piston along the axis, and the other end of the plunger extends into the plunger cavity from the head along the axis.
The pneumatic plunger pump abandons the traditional spring reset, so that not only the oil suction and pumping force of the plunger under the same compressed air pressure are improved, but also the service life limit caused by spring fatigue is avoided, and the upper limit of the reciprocating frequency of the plunger is remarkably improved.
The pneumatic plunger pump adopts a totally-enclosed pump body structure. Except for the compressed air inlet and outlet and the oil way inlet and outlet, the whole micro pump body is a totally-enclosed mechanism, and as long as the compressed air and oil are kept clean, the operation parts of the whole micro pump are kept clean all the time, and even if the external working environment is polluted seriously, the operation parts are not affected, so that the ideal working state is kept for a long time.
The pneumatic plunger pump is introduced with the middle block between the cylinder and the oil cylinder, and is used for providing a connecting space and an operating space between the handle part of the piston and the plunger, so that the oil quantity of the single pump can be regulated and the sealing part can be replaced more conveniently.
Preferably, in the pneumatic plunger pump, the middle block is connected with the oil cylinder through threads. The device is convenient to install through threaded connection, and the sealing between the middle block and the oil cylinder is maintained.
Preferably, in the pneumatic plunger pump, a sealing ring is arranged between the middle block and the oil cylinder. This prevents oil from escaping from the joint and helps maintain a seal between the intermediate block and the cylinder.
Preferably, in the pneumatic plunger pump, a sealing ring is arranged between the middle block and the plunger. This prevents oil from escaping from the joint and helps maintain a seal between the intermediate block and the plunger.
Preferably, in the pneumatic plunger pump, a sealing ring is arranged between the middle block and the piston handle. This prevents oil from escaping from the joint and helps maintain a seal between the intermediate block and the piston shank.
Preferably, in the pneumatic plunger pump, a drain outlet is arranged at the lower part of the middle block. The sewage outlet can discharge dirt in the middle block at any time, so that the pneumatic plunger pump is kept clean, and the working time of the pneumatic plunger pump is prolonged.
Preferably, in the pneumatic plunger pump, one end of the oil cylinder is connected with the pressure detection element. One end of the oil cylinder is connected with the pressure detection element, so that the working state of the pneumatic plunger pump can be monitored at any time, and the main bearing is prevented from being damaged due to abnormal working of the pneumatic plunger pump.
The pressure detection device is used for detecting pressure, the detection mechanism does not have moving parts and is not contacted with the moving parts, the reliability is higher, the service life is longer, and the service life of the pressure detection device is up to 1 hundred million times.
Further, in the pneumatic plunger pump, the pressure detecting element is connected with the oil cylinder through threads. The device is convenient to install through threaded connection, and the sealing between the middle block and the oil cylinder is maintained.
Further, in the pneumatic plunger pump, the pressure detecting element is located at the end of the oil outlet passage. The pressure detection element is positioned at the tail end of the oil outlet channel, and the monitored data is closer to the main bearing and can reflect the lubrication condition.
Further, in the pneumatic plunger pump, the pressure detecting element is located at the end of the blind hole communicated with the oil outlet channel. The pressure detection element is positioned at the tail end of the blind hole communicated with the oil outlet channel and can also monitor the working state of the pneumatic plunger pump.
Further, in the pneumatic plunger pump, the detection time of the pressure detection element is controlled by a programmable logic controller. The programmable logic controller controls the detection time, so that the influence of the periodical change of the pressure on the detection data can be shielded.
Preferably, in such a pneumatic plunger pump, the piston shank is provided with a threaded cavity; and the outer peripheral surface of one end of the plunger is provided with threads matched with the threaded cavity of the piston handle. The plunger stroke is preset by adjusting the depth of the plunger screwed into the handle of the piston, the single pump oil quantity is adjusted, and the problem of pump tightness caused by the arrangement of an external adjusting mechanism is avoided.
Further, in the pneumatic plunger pump, the piston handle is provided with a locking nut for fixing the plunger. The lock nut can prevent the plunger from moving unexpectedly, and the oil quantity of the single pump is influenced.
Preferably, in the pneumatic plunger pump, the front air hole and the rear air hole are respectively communicated with compressed air, and are respectively pressurized and depressurized synchronously. The front air hole and the rear air hole are respectively communicated with compressed gas, and the piston is driven to reciprocate by respectively synchronously pressurizing and depressurizing.
Preferably, in the pneumatic plunger pump, a solenoid valve is arranged on the compressed air path, and the solenoid valve is synchronously controlled by a programmable logic controller. The electromagnetic valve is synchronously controlled by the programmable logic controller, so that the pressurization and the pressure relief can be synchronous and accurate.
Furthermore, in the pneumatic plunger pump, the programmable logic controller also simultaneously controls the pressure detection element, and particularly, the working time of the pressure detection element can be synchronized. This may make the detection data more valuable.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below.
FIG. 1 is a sectional view showing the state of the pneumatic plunger pump sucking oil in example 1 of this patent;
FIG. 2 is a sectional view showing the state of the pneumatic plunger pump pushing out oil according to embodiment 1 of the present application;
FIG. 3 is a schematic diagram showing the state of the pneumatic plunger pump sucking oil in embodiment 1 of the present application;
fig. 4 is a schematic diagram showing the composition of the pneumatic plunger pump in the embodiment 1 of the present application in the oil pushing state.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. The examples do not limit the technical scheme of the application.
Examples
The pneumatic plunger pump shown in the figures 1-4 comprises a cylinder 1, a plunger 6 and an oil cylinder 3; meanwhile, the device also comprises an intermediate block 2 and a one-way valve 7; the cylinder 1, the middle block 2 and the oil cylinder 3 are sequentially connected; the cylinder 1 comprises a front air hole 11, a rear air hole 12 and a piston 5; the front air hole 11 and the rear air hole 12 are respectively positioned at two ends of the stroke of the piston 5 in the cylinder 1; a plunger cavity 32, an oil inlet channel 31 and an oil outlet channel 33 are arranged in the oil cylinder 1; the oil inlet channel 31 is communicated with the middle part of the plunger cavity 32; one end of the one-way valve 7 is communicated with the tail part of the plunger cavity 32, and the other end is communicated with the oil outlet channel 33, so that liquid is permitted to flow from the tail part of the plunger cavity 32 to the oil outlet channel 33 under the set pressure of the one-way valve 7; the plunger 6 passes through the intermediate block 2, with one end axially connected to the piston shank 51 of the piston 5 and the other end axially extending from the head into the plunger cavity 32.
In the pneumatic plunger pump, the middle block 2 is connected with the oil cylinder 3 through threads, a sealing ring 24 is arranged between the middle block 2 and the oil cylinder 3, a sealing ring 23 is arranged between the middle block 2 and the plunger 6, and a sealing ring 21 is arranged between the middle block 2 and the piston handle 51. The lower part of the middle block 2 is provided with a drain outlet 22. The sewage outlet 22 can discharge dirt in the middle block at any time, keep the pneumatic plunger pump clean, and prolong the normal working time of the pneumatic plunger pump.
In the pneumatic plunger pump, one end of an oil cylinder 3 is connected with a pressure detection element 4. The pressure detecting element 4 is connected with the cylinder 3 by a screw thread. The pressure detection element 4 can monitor the working state of the pneumatic plunger pump at any time, and the main bearing is prevented from being damaged due to abnormal working of the pneumatic plunger pump. The pressure detection element 4 is adopted, the detection mechanism has no moving part, and is not contacted with the moving part, so that the reliability is higher, and the service life is longer. The pressure detecting element 4 may be located at the end of the oil outlet channel 33, but may also be located at the end of a blind hole communicating with the oil outlet channel 33.
In this pneumatic plunger pump, the detection time of the pressure detection element 4 is controlled by a programmable logic controller. The programmable logic controller controls the detection time, so that the influence of the periodical change of the pressure on the detection data can be avoided.
In the pneumatic plunger pump, a threaded cavity 53 is arranged on a piston handle 51; the piston shank 51 is provided with a lock nut 52 which secures the plunger. The outer peripheral surface of one end of the plunger 6 is provided with threads which are matched with the threaded cavity of the piston handle 51. The stroke of the plunger 6 is preset by adjusting the depth by which the plunger 6 is screwed into the piston stem 51, and the single pump oil amount is adjusted.
In the pneumatic plunger pump, the front air hole 11 and the rear air hole 12 are respectively communicated with compressed air, and an electromagnetic valve is arranged on the compressed air path and is synchronously controlled by a programmable logic controller to realize synchronous pressurization and pressure relief respectively. The piston 5 is made to reciprocate by respectively synchronously pressurizing and depressurizing, and the plunger 6 is driven to reciprocate. By synchronously controlling the electromagnetic valve by the programmable logic controller, the pressurization and the depressurization can be synchronous and accurate, and the working time of the pressure detection element 4 can be synchronous, so that the detection data is more valuable.
The operation process of the pneumatic plunger pump is as follows:
the electromagnetic valve and the pressure detecting element 4 on the compressed air path corresponding to the front air hole 11 and the rear air hole 12 on the air cylinder 1 are synchronously controlled by a PLC (programmable logic controller);
the depth of the plunger 6 in the threaded cavity 53 is determined based on the required single pump volume, and the plunger 6 is secured with the lock nut 52.
As shown in fig. 2 and 4, the rear air hole 12 is filled with air, the front air hole 11 is depressurized and exhausted, and the compressed air pushes the piston 5 to move away from the oil cylinder 3, so that the plunger 6 is driven to move in the same direction, a negative pressure is formed in the plunger cavity 32, and external oil is sucked from the oil inlet channel 31 and fills the plunger cavity 32.
As shown in fig. 1 and 3, the front air hole 11 is used for air intake, the rear air hole 12 is used for pressure relief and air exhaust, the compressed air pushes the piston 5 to move towards the direction approaching to the oil cylinder 3, the plunger 6 is driven to move in the same direction, the oil in the plunger cavity 32 in the oil cylinder is extruded to the one-way valve 7, when the extrusion force exceeds the opening pressure of the one-way valve 7, the one-way valve 7 is opened, and the oil is extruded and flows out through the oil outlet channel 33.
The PLC controls the pressure detecting element 4 to detect the pressure of the oil outlet channel 33 when the oil is extruded.
The pneumatic plunger pump has the following advantages:
1. and a totally-enclosed pump body structure. Except for the compressed air inlet and outlet, the oil way inlet and outlet and the middle block drain outlet, the whole pneumatic plunger pump body is a totally-enclosed mechanism, and as long as the compressed air and oil products are kept clean, the operation parts of the whole pneumatic plunger pump are kept clean for a long time, and even if the external working environment is polluted seriously, the operation parts are not influenced, so that the clean working state is kept for a long time.
2. Because the traditional plunger spring resetting technology is abandoned, the oil absorption and pumping force of the plunger under the same compressed air pressure are improved, the service life limitation caused by spring fatigue is avoided, and the upper limit of the reciprocating frequency of the plunger is remarkably improved.
3. The single pump oil amount is pre-adjusted. The plunger stroke is preset by adjusting the depth of the plunger screwed into the handle of the piston, the single pump oil quantity is adjusted, and the problem of pump tightness caused by the arrangement of an external adjusting mechanism is avoided.
4. And (5) non-contact detection. The pressure detection element is adopted, so that the detection mechanism has no moving parts, and the loss is small and the service life is long. The lifetime of the pressure sensing element may be as high as 1 hundred million times.
Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, variations and combinations of the embodiments may be made without departing from the principles and spirit of the application. The scope of the application is defined by the appended claims and equivalents thereof.

Claims (16)

1. A pneumatic plunger pump comprises a cylinder, a plunger and an oil cylinder;
the device is characterized by further comprising a middle block and a one-way valve;
the cylinder, the middle block and the oil cylinder are sequentially connected;
the cylinder comprises a front air hole, a rear air hole and a piston; the front air hole and the rear air hole are respectively positioned at two ends of the piston stroke in the cylinder;
a plunger cavity, an oil inlet channel and an oil outlet channel are arranged in the oil cylinder; the oil inlet channel is communicated with the middle part of the plunger cavity;
one end of the one-way valve is communicated with the tail part of the plunger cavity, and the other end of the one-way valve is communicated with the oil outlet channel, so that liquid is permitted to flow from the tail part of the plunger cavity to the oil outlet channel under set pressure;
the plunger passes through the intermediate block, one end of the plunger is connected with the piston along the axis, and the other end of the plunger extends into the plunger cavity from the head along the axis.
2. The pneumatic plunger pump of claim 1, wherein the intermediate block is threadably connected to the cylinder.
3. The pneumatic plunger pump of claim 1, wherein a seal ring is disposed between the intermediate block and the cylinder.
4. The pneumatic plunger pump of claim 1, wherein a seal ring is disposed between the intermediate block and the plunger.
5. The air operated plunger pump as set forth in claim 1 wherein a seal ring is disposed between said intermediate block and said piston shank.
6. The air-operated plunger pump as set forth in claim 1, wherein said intermediate block has a drain at a lower portion thereof.
7. The pneumatic plunger pump of claim 1, wherein one end of the cylinder is connected to a pressure sensing element.
8. The pneumatic plunger pump of claim 7, wherein the pressure sensing element is threadably coupled to the cylinder.
9. The air operated plunger pump as set forth in claim 7, wherein said pressure detecting element is located at an end of said oil discharge passage.
10. The pneumatic plunger pump of claim 7, wherein the pressure sensing element is located at an end of a blind bore in communication with the oil outlet passage.
11. The pneumatic plunger pump of claim 7, wherein the pressure sensing element sensing time is controlled by a programmable logic controller.
12. The air operated plunger pump as set forth in claim 1 wherein said piston shank is provided with a threaded cavity; and the outer peripheral surface of one end of the plunger is provided with threads matched with the threaded cavity of the piston handle.
13. The air operated plunger pump as set forth in claim 12 wherein said piston shank is provided with a lock nut for securing said plunger.
14. The air operated plunger pump as set forth in claim 1, wherein said front air hole and said rear air hole are respectively connected with compressed air, and are respectively pressurized and depressurized synchronously.
15. The pneumatic plunger pump of claim 1, wherein a solenoid valve is disposed on the compressed air path, the solenoid valve being synchronously controlled by a programmable logic controller.
16. The pneumatic plunger pump of claim 15, wherein the programmable logic controller simultaneously controls the pressure sensing elements.
CN202210219482.4A 2022-03-08 2022-03-08 Pneumatic plunger pump Pending CN116771627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210219482.4A CN116771627A (en) 2022-03-08 2022-03-08 Pneumatic plunger pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210219482.4A CN116771627A (en) 2022-03-08 2022-03-08 Pneumatic plunger pump

Publications (1)

Publication Number Publication Date
CN116771627A true CN116771627A (en) 2023-09-19

Family

ID=87994946

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210219482.4A Pending CN116771627A (en) 2022-03-08 2022-03-08 Pneumatic plunger pump

Country Status (1)

Country Link
CN (1) CN116771627A (en)

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