CN114440105B

CN114440105B - Centralized lubricating pump and exhaust method thereof during first lubricating grease adding

Info

Publication number: CN114440105B
Application number: CN202210103539.4A
Authority: CN
Inventors: 苏红新; 朱二莉; 卢晨阳; 李玉柱; 谢元辉; 郭朋达
Original assignee: Zhengzhou Zhongcheng Lubrication Technology Co ltd
Current assignee: Zhengzhou Zhongcheng Lubrication Technology Co ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2023-03-31
Anticipated expiration: 2042-01-28
Also published as: CN114440105A

Abstract

The invention discloses a centralized lubrication pump and an exhaust method thereof during first lubricating grease adding, and relates to the technical field of centralized lubrication. The centralized lubrication pump comprises a pump body and a grease cylinder arranged above the pump body, wherein the lower end of the grease cylinder is hermetically connected with the pump body, the upper end of the grease cylinder is connected with a top cover, and a through hole is formed in the center of the top cover; a vertical pressure spring and a piston connected to the lower end of the pressure spring are arranged in the grease cylinder, a sealing ring is sleeved on the periphery of the piston, and the sealing ring and the piston can move up and down along the inner wall of the grease cylinder under the action of pressure and are tightly attached to the inner wall of the grease cylinder in a sealing manner; at least one exhaust membrane is glued on the inner wall of the grease cylinder close to the lower side, and when the piston moves to the corresponding area of the exhaust membrane, an exhaust gap is formed between the sealing ring and the edge of the exhaust membrane. The centralized lubricating pump has the advantages of simple structure, low cost, convenient operation, strong practicability and good exhaust effect, and the exhaust method during the first lubricating grease adding is beneficial to the smooth discharge of redundant gas.

Description

Centralized lubricating pump and exhaust method thereof during first lubricating grease adding

Technical Field

The invention belongs to the technical field of centralized lubrication, and particularly relates to a centralized lubrication pump and an exhaust method thereof during first lubricating grease adding.

Background

The centralized lubricating system is widely applied to the fields of commercial vehicles, engineering machinery, wind power and the like, and the lubricating pump is used for conveying lubricating grease to each lubricating point through a grease conveying pipeline in a timed and quantitative manner through fixed program setting, so that the purpose of automatically filling lubricating grease into a friction pair is realized. Typically, the lubrication pump and grease cartridge are combined. After the device is assembled, the next step is to fill the lubricating pump with grease. When lubricating grease is filled, original air in the pump cavity needs to be emptied, and only when the air is emptied, the plunger pump or the gear pump in the pump body can normally work. In the prior air exhaust method, a one-way valve is arranged on a grease cylinder, and in practical use, the phenomenon that the one-way valve is blocked due to non-uniformity in grease filling sometimes occurs, namely the one-way valve is blocked by grease when air is not emptied. In addition, the mechanical strength of the grease tube is reduced by forming the vent hole in the grease tube, and the occurrence of cracks due to stress concentration is likely to occur.

Disclosure of Invention

The invention aims to provide a centralized lubrication pump and an exhaust method thereof during the first lubricating grease adding process, wherein the centralized lubrication pump is simple in structure, low in cost, convenient to operate, strong in practicability and good in exhaust effect.

In order to achieve the purpose, the invention adopts the technical scheme that: a centralized lubrication pump comprises a pump body and a grease cylinder arranged above the pump body, wherein the lower end of the grease cylinder is hermetically connected with the pump body, the upper end of the grease cylinder is connected with a top cover, and a through hole is formed in the center of the top cover; a vertical pressure spring and a piston connected to the lower end of the pressure spring are arranged in the grease cylinder, a sealing ring is sleeved on the periphery of the piston, and the sealing ring and the piston can move up and down along the inner wall of the grease cylinder under the action of pressure and are tightly attached to the inner wall of the grease cylinder in a sealing manner; at least one exhaust membrane is glued on the inner wall of the grease cylinder close to the lower side, and when the piston moves to the corresponding area of the exhaust membrane, an exhaust gap is formed between the sealing ring and the edge of the exhaust membrane.

In one embodiment, the exhaust membrane has a length of 10-20 mm, a width of 5-10 mm and a thickness of 0.15-0.5 mm.

In one embodiment, the number of the exhaust membranes is 1 to 3, and when the number of the exhaust membranes is 2 or 3, the exhaust membranes are uniformly arranged along the circumferential direction.

In one embodiment, the pump body comprises a shell and a grease pump positioned in the shell, and a controller, a grease adding port and an oil delivery pipe port are arranged outside the shell.

In one embodiment, the upper part of the shell is provided with a first sealing ring groove, the lower part of the top cover is provided with a second sealing ring groove, the grease cylinder is respectively connected with the shell and the top cover in a sealing way through the first sealing ring groove and the second sealing ring groove, and the grease cylinder, the shell and the top cover are fastened through long bolts.

Furthermore, the upper end of the pressure spring is connected with the top cover, and the lower end of the pressure spring is connected with the piston.

Furthermore, the upper end face of the shell is provided with a hole for lubricating grease to pass through.

In one embodiment, the clearance between the outer edge of the piston main body and the inner wall of the grease cylinder is 3mm, a sealing ring positioning flange is arranged above the outer edge of the piston main body, and the distance between the outer edge of the positioning flange and the inner wall of the grease cylinder is 1mm.

In one embodiment, the sealing ring is 3mm and is sleeved on the piston main body, and one side face of the sealing ring is propped against the positioning flange, so that the sealing ring cannot be separated upwards when force is applied to the piston.

This application provides an exhaust method when centralized lubrication pump adds grease for the first time simultaneously, centralized lubrication pump adopts above-mentioned arbitrary one after the oil pocket of the pump body is full of grease, continue the filling grease, when grease got into grease section of thick bamboo and is full of the piston tip, unnecessary air was along the exhaust gap continues to be discharged, and after the piston rise exceeded the length of exhaust membrane, the sealing washer on the piston was laminated at the inner wall of grease section of thick bamboo completely, formed good sealedly.

By adopting the technical scheme, the invention can achieve the following beneficial effects: according to the centralized lubricating pump, the exhaust film is adhered to the inner wall below the grease cylinder, and the smooth discharge of redundant gas in the oil cavity of the pump body is realized when the lubricating pump is lubricated for the first time by using the exhaust gap formed between the exhaust film and the sealing ring; because the exhaust membrane has a certain height, the air which is not exhausted and is generated by uneven grease filling can be continuously and uniformly exhausted in the height interval of the exhaust membrane, and the exhaust effect is good; the piston moves upwards to cross the exhaust membrane, and after the exhaust is finished, the sealing ring on the piston is tightly attached to the inner wall of the grease cylinder to form good sealing and automatically close the exhaust channel. This application has effectively solved and has adopted the check valve exhaust to exist the phenomenon of stifled check valve of dying among the prior art, avoids opening the exhaust hole on a grease section of thick bamboo and leads to its mechanical strength to descend. The utility model provides a centralized lubrication pump is whole safe and reliable, simple structure, and the cost is low, convenient operation, easily realizes that the practicality is strong.

Drawings

FIG. 1 is a schematic diagram of a centralized lubrication pump according to an embodiment of the present invention;

FIG. 2 is a schematic view of the grease cartridge of FIG. 1 shown removed;

FIG. 3 is a schematic structural view of a grease cartridge with an attached venting film;

FIG. 4 is a cross-sectional view of the interior of the grease cartridge being filled with a quantity of grease;

FIG. 5 is a schematic cross-sectional view of the grease cartridge with the piston in the area of the vent membrane;

fig. 6 is an enlarged view of a portion a in fig. 5.

The labels in the figure are: 1. pump body, 11, oil pipeline interface, 12, controller, 13, grease adding port, 2, nut

3. The lubricating device comprises a grease cylinder 31, an exhaust membrane 4, a top cover 5, a long bolt 6, a pressure spring 7, a piston 8, a sealing ring 9, lubricating grease 10 and an exhaust gap.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples.

The structures, proportions, and dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and therefore, the present disclosure is not limited to the essential meanings of the technology, and any modifications of the structures, changes of the proportions, or adjustments of the dimensions, should be within the scope of the present disclosure without affecting the efficacy and attainment of the same. Meanwhile, the directions or positional relationships referred to in the present specification, such as "upper", "lower", "left", "right", and the like, are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of operations, but do not indicate or imply that the devices or elements referred to must have a specific direction, be configured in a specific direction, and be operated, and therefore, the present application is not limited thereto, and changes or adjustments of the relative relationships thereof are considered to be within the scope of the present application without substantial technical changes.

The application provides a centralized lubrication pump and an exhaust method thereof during first-time lubricating grease adding, and aims to solve the problems that the structure of the centralized lubrication pump is complex and a check valve is easy to block due to exhaust of the check valve in the prior art.

Example one

As shown in fig. 1 to 6, the present embodiment provides a centralized lubrication pump including a pump body 1 and a grease cartridge 3 provided above the pump body 1, and the grease cartridge 3 can be filled with grease through a grease filling port 13 provided in the pump body 1.

The oil cylinder 3 is in a vertical cylindrical shape, two ends of the oil cylinder are open, the lower end of the oil cylinder 3 is hermetically connected with the pump body 1, the upper end of the oil cylinder 3 is connected with a top cover 4, and a through hole is formed in the center of the top cover 4 and serves as a passage for atmospheric pressure. And a vertical pressure spring 6 and a piston 7 connected to the lower end of the pressure spring 6 are arranged in the grease cylinder 3. The upper end of the pressure spring 6 is connected with the top cover 4, and the lower end of the pressure spring is connected with the piston 7. The periphery of the piston 7 is sleeved with a sealing ring 8, the sealing ring 8 and the piston 7 can move up and down along the inner wall of the grease cylinder 3 under the action of pressure, and the outer edges of the sealing ring 8 and the piston 7 are tightly attached to the inner wall of the grease cylinder 3 in a sealing mode. At least one exhaust membrane 31 is glued on the inner wall of the grease cylinder 3 close to the lower part, and when the piston 7 moves to the area corresponding to the exhaust membrane 31, an exhaust gap 10 is formed between the sealing ring 8 and the edge of the exhaust membrane 31.

Further, the exhaust membrane 31 is a rectangular plastic film, and the lower end of the plastic film is flush with the lower edge of the grease cylinder 3. Preferably, the exhaust membrane 31 has a length of 10 to 20mm, a width of 5 to 10mm, and a thickness of 0.15 to 0.5mm. The number of the vent membranes 31 is generally 1 to 3, and in this embodiment, 1 vent membrane is provided.

Specifically, the pump body 1 includes a housing and a grease pump located in the housing, and a hole for passing the grease 9 is formed in an upper end surface of the housing. The grease pump is a plunger pump or a gear pump, and a controller 12, a grease adding port 13 and an oil conveying pipe connector 11 are arranged outside the shell. In this application, the controller 12, the grease adding port 13 and the oil pipeline interface 11 on the casing are all the prior art, and are not described herein again.

When the lubricating grease is firstly added, the lubricating grease enters the oil cavity of the pump body 1 through the grease adding port 13, the lubricating grease gradually rises to exhaust air in the oil cavity upwards, and when the end part of the piston 7 is filled with the lubricating grease, the air is exhausted upwards through the exhaust gap 10 formed between the exhaust membrane 31 and the sealing ring 8, so that the air is prevented from remaining in the oil cavity.

Furthermore, a first sealing ring groove is formed in the upper portion of the shell, a second sealing ring groove is formed in the lower portion of the top cover 4, the lower end bonding surface of the grease cylinder 3 is connected with the shell in a sealing mode through the first sealing ring groove, and the upper end bonding surface of the grease cylinder 3 is connected with the top cover 4 in a sealing mode through the second sealing ring groove. The grease cartridge 3, the housing and the top cover 4 are fastened by four long bolts 5. During specific implementation, bolt holes are correspondingly formed in the peripheries of the shell and the top cover 4, and the long bolts 5 penetrate through the bolt holes and are fastened through the nuts 2.

During specific implementation, the clearance of 7 main part outer margins of piston and 3 inner walls of grease section of thick bamboo is 3mm, and the top of 7 main part outer margins of piston is equipped with 8 locating flange of sealing washer, the outer fringe of locating flange is 1mm with 3 inner walls of grease section of thick bamboo intervals. The sealing ring 8 is 3mm and is sleeved on the main body of the piston 7, one side face of the sealing ring 8 is propped against the positioning flange, and the sealing ring 8 is guaranteed not to be separated upwards when force is applied to the piston 7.

In the application, the exhaust gap is formed by skillfully sticking the exhaust film, and the size of the exhaust hole is adjusted by controlling the thickness of the exhaust film; the length of the exhaust membrane 31 is 10-20 mm, and the length can meet the requirement of smooth air exhaust and can avoid lubricating grease leakage along an exhaust gap; and along with the rise of the height of the lubricating grease, after the piston 7 passes over the exhaust membrane 31, the sealing ring 8 on the periphery of the piston 7 is in sealing connection with the inner wall of the grease cylinder 3, namely, the exhaust channel is automatically closed until the filling of the lubricating grease is finished.

This centralized lubrication pump need not to set up and is used for carminative check valve and other exhaust ducts, avoids trompil to do the exhaust hole on a grease section of thick bamboo, and centralized lubrication pump overall structure is simple, the operation of being convenient for, and is with low costs, and it is effectual to exhaust.

The installation method of the centralized lubrication pump comprises the following steps:

1. the pump body 1 is ready for use.

2. Two ends of the pressure spring are respectively provided with a top cover 4 and a piston 7.

3. The body of the piston 7 is sleeved with the sealing ring 8, and the sealing ring 8 is compacted on the positioning flange.

4. The inside of the grease cylinder 3 is pasted with 1 exhaust film.

5. The piston is plugged into the grease cylinder 3, when the piston approaches the exhaust membrane 31, the sealing ring 8 is shifted by using the flat screwdriver, and meanwhile, the piston 7 is continuously pushed, so that the sealing ring 8 presses the exhaust membrane 31 to continuously advance. Thus, under the action of the vent film 31, the seal ring 8 cannot be well attached to the inner wall of the grease tube 3, and two vent slits 10 with triangular curved sides are formed on two sides of the vent film 31, as shown in fig. 6.

6. The grease cylinder 3 provided with the top cover 4, the pressure spring 6 and the piston 7 is arranged on the pump body 1, and two ends of the grease cylinder 3 are respectively aligned to the first sealing ring groove on the pump body 1 and the second sealing ring groove on the top cover 4, are compressed and are fixed by the long bolt 5.

Example two

The difference between the present embodiment and the first embodiment is: the number of the exhaust membranes 31 is 2 or 3, and the exhaust membranes 31 are uniformly arranged along the circumferential direction of the grease barrel 3. When the piston 7 moves to the area of the

exhaust film

31, 4 or 6 exhaust gaps 10 are formed at the edge of the exhaust film, so that the original air in the oil cavity of the pump body 1 can be smoothly exhausted.

Of course, the number of the exhaust membranes 31 can be set according to the type of the grease barrel 3, and if the diameter of the grease barrel 3 is larger, the number of the exhaust membranes can be increased.

EXAMPLE III

The present embodiment provides a method for exhausting grease from a centralized lubrication pump during the first grease feeding, which employs the centralized lubrication pump in the first embodiment or the second embodiment.

After the oil cavity of the grease pump is filled with the grease, the grease 9 is continuously filled, the grease 9 enters the grease cylinder 3 through the hole on the pump body 1, and when the end part of the piston 7 is filled with the grease, the redundant air is continuously discharged along the exhaust gap 10; then, as the grease is filled, the piston 7 continues to rise, and because the air discharge slit 10 has a certain height, the air that has not been discharged due to uneven rise of the grease 9 can continue to be discharged through the air discharge slit 10. In the present application, the air release film 31 is provided near the lower side of the grease cartridge 3, and when the piston 7 is located in the area of the air release film 31, the compression spring 6 approaches the free length, and the elastic force is not very large. When the piston 7 rises to about 10mm, air is basically exhausted, lubricating grease is continuously filled, the piston 7 is continuously pushed to rise, the pressure of the pressure spring 6 is continuously increased, and after the rising height of the piston 7 exceeds the length of the exhaust membrane 31, the sealing ring 8 on the piston 7 is completely attached to the inner wall of the grease cylinder to form good sealing. Until the grease is filled to the desired capacity.

In the exhaust process, when the grease 9 is filled into the pump body 1 through the grease adding port 13, air in the grease is continuously discharged into the grease barrel 3, is discharged above the piston along the exhaust gaps 10 on two sides of the exhaust membrane 31, and is communicated with the atmosphere through the through hole on the top cover 4.

It should be clear that, the length of the vent film 31 in the present application does not exceed 20mm because the pressure of the compression spring 6 increases with the rise of the piston 7, if the vent film is too long, the sealing of the sealing ring will be affected, and the phenomenon that the grease 9 leaks along the vent gap 10 will occur under the condition of increased pressure.

By adopting the centralized lubricating pump, the mode of sticking the exhaust membrane on the inner wall of the grease cylinder is adopted, so that the original air in the oil cavity of the pump body is smoothly exhausted when the lubricating grease is added for the first time, the exhaust channel can be automatically closed along with the exhaust of the air, the cost is low, the assembly is convenient, and the realization and the popularization are easy.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, improvement and the like made within the spirit of the present invention shall be included in the scope of the protection of the claims of the present invention.

Claims

1. The utility model provides a centralized lubrication pump, includes pump body (1) and sets up in a grease section of thick bamboo (3) of pump body (1) top, its characterized in that: the lower end of the grease cylinder (3) is hermetically connected with the pump body (1), the upper end of the grease cylinder (3) is connected with a top cover (4), and a through hole is formed in the center of the top cover (4);

a vertical pressure spring (6) and a piston (7) connected to the lower end of the pressure spring (6) are arranged in the grease cylinder (3), a sealing ring (8) is sleeved on the periphery of the piston (7), and the sealing ring (8) and the piston (7) can move up and down along the inner wall of the grease cylinder (3) under the action of pressure and are tightly attached to the inner wall of the grease cylinder (3) in a sealing manner;

at least one exhaust membrane (31) is glued on the inner wall of the grease cylinder (3) close to the lower side, and when the piston (7) moves to the area corresponding to the exhaust membrane (31), an exhaust gap (10) is formed between the sealing ring (8) and the edge of the exhaust membrane (31).

2. A centralized lubrication pump as set forth in claim 1, wherein: the exhaust membrane (31) is 10-20 mm long, 5-10 mm wide and 0.15-0.5 mm thick.

3. A centralized lubrication pump as set forth in claim 2, wherein: the number of the exhaust membranes (31) is 1-3, and when the number of the exhaust membranes (31) is 2 or 3, the exhaust membranes are uniformly arranged along the circumferential direction.

4. A centralized lubrication pump as set forth in claim 3, wherein: the pump body (1) comprises a shell and a grease pump positioned in the shell, wherein a controller (12), a grease filling port (13) and an oil conveying pipe connector (11) are arranged outside the shell.

5. The centralized lubrication pump of claim 4, wherein: casing upper portion is equipped with first sealed annular, and top cap (4) lower part is equipped with the sealed annular of second, grease section of thick bamboo (3) through first sealed annular and the sealed annular of second respectively with casing and top cap (4) sealing connection, grease section of thick bamboo (3), casing and top cap (4) are through stay bolt (5) fastening.

6. A centralized lubrication pump as set forth in claim 5, wherein: the upper end of the pressure spring (6) is connected with the top cover (4), and the lower end of the pressure spring is connected with the piston (7).

7. A centralized lubrication pump as set forth in claim 6, wherein: and the upper end surface of the shell is provided with a hole for lubricating grease to pass through.

8. A centralized lubrication pump as set forth in claim 1, wherein: the clearance of piston (7) main part outer fringe and grease section of thick bamboo (3) inner wall is 3mm, and the top of piston (7) main part outer fringe is equipped with sealing washer (8) location flange, the outer fringe of location flange is 1mm with grease section of thick bamboo (3) inner wall interval.

9. A centralized lubrication pump as set forth in claim 8, wherein: the sealing ring (8) is 3mm and is sleeved on the main body of the piston (7), one side face of the sealing ring (8) is propped against the positioning flange, and the sealing ring (8) is guaranteed not to be separated upwards when force is applied to the piston (7).

10. A method for exhausting when a centralized lubrication pump adds lubricating grease for the first time is characterized in that: the centralized lubrication pump adopts the centralized lubrication pump as claimed in any one of claims 1 to 9, after the oil cavity of the pump body is filled with the lubricating grease, the lubricating grease is continuously filled, when the lubricating grease enters the grease cylinder (3) and fills the end part of the piston (7), the redundant air is continuously discharged along the exhaust gap (10), and after the rising height of the piston (7) exceeds the length of the exhaust membrane (31), the sealing ring (8) on the piston (7) is completely attached to the inner wall of the grease cylinder (3) to form good sealing.