Lubricant pumping unit with built-in pressure relief function, auxiliary tool and method

Abstract

The invention relates to a lubricant pumping unit with a built-in pressure relief function, an auxiliary tool and a method. The lubricant pumping unit comprises a first pump unit; the first pump unit comprises a shell with a cavity. Three channels communicated with the cavity are arranged in the shell; one path is communicated with an input channel A connected with a lubricant input side, one path is communicated with a lubricant supply channel B of an external discharge end, and the other path is communicated with an overflow channel C of an overflow end; a plunger I is movably arranged in the lubricant feeding channel B; the movable plunger I is used for opening or blocking the input channel A and the lubricant supply channel B, and meanwhile, the plunger I expands or extrudes the space of the cavity; the plunger I comprises a plunger body; a pressure relief hole is formed in the plunger body in the radial direction; the device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] The present invention relates to a plunger pumping unit in the field of lubrication of mechanical equipment, and particularly to a lubricant pumping unit with a built-in pressure relief function, an auxiliary tooling and a method. Background Art

[0002] Before improvement, the lubricant pumping unit is as shown in Figures 1-3 , in which a plunger two 27 is arranged on a pump unit two 26, the pump unit two 26 is arranged on a pump two 19, and its outlet is connected to an outlet three-way joint 24. An overflow valve 23 is arranged at the top of the outlet three-way joint 24; a lubricant return assembly 22 is arranged at the top of the overflow valve 23, and a lubricant return hole 21 is connected to the lubricant return assembly 22 through a lubricant return pipeline 20; when the pump two 19 starts to work, the plunger two 27 reciprocates, and the lubricant in the lubricant storage cavity 25 is sucked into the pump unit two 26 and discharged through the outlet three-way joint 24.

[0003] When the outlet pressure is too high, the overflow valve 23 overflows, and the overflowed lubricant returns to the lubricant storage cavity 25 through the lubricant return assembly 22, the lubricant return pipeline 20 and the lubricant return hole 21.

[0004] The lubricant pumping unit before improvement mainly solves the problems that some existing plunger pumps have external safety overflow valves and lubricant return devices, which are costly, occupy a large space, are complex to install, have many connection points, have a high failure rate, and are prone to environmental pollution after problems occur.

[0005] Before improvement, when assembling the pump unit two 26, it is generally manually controlled, resulting in assembly pollution, and the assembly accuracy depends entirely on the experience of the assembler, resulting in uneven quality. Summary of the Invention

[0006] Generally speaking, the technical problem to be solved by the present invention is to provide a lubricant pumping unit with a built-in pressure relief function, an auxiliary tooling and a method.

[0007] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0008] In order to improve the lubricant structure, a lubricant pumping unit with a built-in pressure relief function includes a pump unit one; the pump unit one includes a housing having a cavity; three channels communicating with the cavity are built in the housing; one channel is an input channel A connected to the input side of the lubricant, one channel is a lubricant supply channel B communicating with the outer discharge end, and one channel is an overflow channel C communicating with the overflow end.

[0009] A plunger one is movably arranged in the lubricant supply channel B; the movable plunger one is used to open or block the input channel A and the lubricant supply channel B, and at the same time, the plunger one expands or squeezes the space of the cavity.

[0010] The plunger 1 includes a plunger body; a pressure relief hole is radially provided on the plunger body;

[0011] A central blind hole is provided in the plunger 1; the bottom of the central blind hole is connected to the pressure relief hole 15; a valve core is movably arranged in the central blind hole; an adjusting plug with a central hole is arranged at the inlet of the central blind hole;

[0012] The central blind hole and the pressure relief hole serve as the overflow channel C.

[0013] As a further improvement of the above technical solution:

[0014] In order to achieve continuous supply of lubricant, a pump 1 is provided at the input end of the pump unit 1.

[0015] A driving part is arranged on one side of the plunger body;

[0016] A return spring is arranged between the housing and the plunger body;

[0017] A push plate is arranged on the plunger body for supporting the return spring.

[0018] In order to achieve processing, manufacturing and assembly, the lubricant supply channel B is a central hole;

[0019] In order to facilitate modular assembly and improve assembly accuracy and efficiency, the housing has a connecting shaft section, and a gasket is arranged on one side of the connecting shaft section;

[0020] A communication channel, a sealing through hole, an installation channel and a threaded channel are successively arranged in the lubricant supply channel B;

[0021] An adjusting nut is arranged in the threaded channel, and a valve stem is fitted in the sealing through hole;

[0022] The sealing through hole is in conical seal with the valve stem; a spring seat is arranged on the valve stem;

[0023] A secondary spring is arranged between the spring seat and the adjusting nut;

[0024] The adjusting nut is provided with a guiding process hole for the valve stem;

[0025] A sealing ring is arranged on the valve stem.

[0026] As an improvement, the output end of the lubricant supply channel B is connected with an outlet joint, and an overflow valve spring is connected between the valve core and the step surface of the central blind hole;

[0027] The spring force of the secondary spring is greater than the spring force of the overflow valve spring.

[0028] As an operating technical feature, when the pump 1 starts to work, the plunger 1 reciprocates, the lubricant in the lubricant storage cavity is sucked into the pump unit 1 and discharged through the outlet joint;

[0029] When the outlet pressure is too high, the valve core inside the plunger opens, and the overflow lubricant returns to the lubricant storage chamber through the pressure relief hole.

[0030] The housing is clamped by means of an auxiliary tooling for one-time clamping for assembly.

[0031] In order to improve the assembly accuracy, increase the assembly precision, reduce the number of clamping operations, and improve the integration of assembly, an auxiliary tooling for a lubricant pumping unit includes a support frame; an assembly process for the above-mentioned supporting lubricant pumping unit;

[0032] A fixed base is arranged in the middle of the support frame;

[0033] Longitudinal tracks are arranged on the support frame on both sides of the fixed base;

[0034] Longitudinal push rods are arranged on both sides of the fixed base;

[0035] Longitudinal top seats that are pulled and moved by the longitudinal push rods are arranged on the longitudinal tracks;

[0036] A first V-block and a second V-block are adjustably arranged at the placement station of the fixed base;

[0037] The first V-block and the second V-block are used under the longitudinally placed housing of the bracket;

[0038] A clamping manipulator controlled by a robotic arm is provided on one side of the fixed base;

[0039] A tip head is arranged on the longitudinal top seat;

[0040] The clamping manipulator includes a clamping head; a fixed side arm is arranged on one side of the clamping head and a movable side arm is arranged on the other side;

[0041] The movable side arm is used to clamp or release the housing by approaching or moving away from the fixed side arm;

[0042] The housing has a circular cylindrical or hexagonal cylindrical shape concentric with the lubricant supply channel B;

[0043] V-shaped fingers are arranged on the inner side walls of the movable side arm and the fixed side arm;

[0044] The clamping head is connected with a connecting taper shank.

[0045] An auxiliary assembly method for a lubricant pumping unit, with the aid of the above-mentioned auxiliary tooling; the auxiliary assembly method includes the following steps;

[0046] Step 1, place the housing on the first V-block and the second V-block;

[0047] Step 2, the longitudinal push rods pull the longitudinal top seats on both sides to move towards each other, so as to abut against both ends of the housing;

[0048] Step 3: The movable side arm approaches the clamping and fixing side arm to clamp the outer wall of the housing. At the same time, the first V-block and the second V-block move outward to both sides;

[0049] Step 4: Determine the center height of the housing through the V-shaped fingers;

[0050] Step 5: The robotic arm clamps the housing to the assembly station to form a housing assembly;

[0051] Step 6: Place the housing assembly onto Pump 1.

[0052] As a further improvement of the above technical solution:

[0053] In Step 5, first, pre-assemble the valve stem at the right end of the housing;

[0054] Among them, the pre-assembled valve stem is pre-assembled with a spring seat, a secondary spring, and an adjusting nut assembly;

[0055] Then, assemble the plunger body assembly at the left end of the housing.

[0056] The present invention is reasonably designed, low in cost, strong, durable, safe, reliable, simple to operate, time-saving, labor-saving, cost-saving, compact in structure and convenient to use, with high integration. The safety overflow valve and the lubricant return device are built into the plunger, with basically no maintenance required, greatly reducing costs and external space, saving a lot of installation space. After the lubricant overflows, it directly returns to the pump, preventing environmental pollution.

[0057] The lubricant pumping unit of the present invention is equipped with auxiliary tooling, thereby reducing the number of clamping operations, improving the clamping accuracy, improving the versatility, achieving initial positioning through the V-blocks, achieving precise positioning through the center points, and achieving firm clamping through the V-fingers. This unique positioning and clamping is an original creation of the present invention. Description of the Drawings

[0058] Figure 1 is a schematic structural diagram of Pump 2 before improvement of the present invention.

[0059] Figure 2 is a schematic structural diagram of Plunger 2 before improvement of the present invention.

[0060] Figure 3 is a schematic structural diagram of Pump Unit 2 before improvement of the present invention.

[0061] Figure 4 is a schematic structural diagram of Pump 1 after improvement of the present invention.

[0062] Figure 5 is a schematic structural diagram of the gasket usage of the present invention.

[0063] Figure 6It is a schematic structural diagram of the adjusting plug of the present invention.

[0064] Figure 7 It is a schematic structural diagram of the housing of the present invention.

[0065] Figure 8 It is a schematic structural diagram of the present invention.

[0066] Figure 9 It is a schematic structural diagram of the use of the present invention.

[0067] Wherein: 1, Pump One; 2, Pump Unit One; 3, Outlet Connector; 4, Housing; 5, Sealing Pad; 6, Adjusting Nut; 7, Secondary Spring; 8, Spring Seat; 9, Sealing Ring; 10, Valve Stem; 11, Return Spring; 12, Push Plate; 13, Plunger One; 14, Plunger Body; 15, Pressure Relief Hole; 16, Overflow Valve Spring; 17, Spool; 18, Adjusting Plug; 19, Pump Two; 20, Return Lubricant Pipeline; 21, Return Lubricant Hole; 22, Return Lubricant Assembly; 23, Overflow Valve; 24, Outlet Three-Way Connector; 25, Lubricant Storage Chamber; 26, Pump Unit Two; 27, Plunger Two; 28, Support Frame; 29, Longitudinal Track; 30, Fixed Base; 31, Longitudinal Push Rod; 32, Longitudinal Top Seat; 33, First V-Seat; 34, Second V-Seat; 35, Clamping Manipulator; 36, Placement Station; 37, Tip Head; 38, Clamping Head; 39, Movable Side Arm; 40, V-Type Finger; 41, Connecting Taper Shank; 42, Driving Member; 42, Driving Member; 43, Cavity. Detailed Embodiment

[0068] As Figures 1-9 , the lubricant pumping unit with built-in pressure relief function in this embodiment includes Pump Unit One 2; as Figure 4 shown, Pump Unit One 2 includes a housing 4 having a cavity 43 therein, which is the core of the assembly, and its assembly accuracy and form and position errors are low; three channels communicating with the cavity 43 are built in the housing 4, and its cavity realizes quantitative supply of lubricant; as a specific illustration, one channel communicates with the input channel A connected to the input side of the lubricant, so as to realize the entry of the lubricant, one channel communicates with the lubricant supply channel B at the outer discharge end to realize continuous lubricant supply, and one channel communicates with the overflow channel C at the overflow end; when the output pressure is too high, it opens to avoid too high system pressure. As the main improvement, compared with the traditional structure, its structure is reasonable, the distribution of pipelines is reduced, and the oil return path is reduced.

[0069] A plunger one 13 is movably arranged in the lubricant supply channel B; the movable plunger one 13 is used to open or block the input channel A and the lubricant supply channel B, and at the same time, the plunger one 13 expands or squeezes the space of the cavity 43;

[0070] Compared with the traditional structure, which realizes safe overflow by using the middle hole, the plunger 13 includes a plunger body 14; a pressure relief hole 15 is radially arranged on the plunger body 14;

[0071] As an innovation of the design, a central blind hole is arranged in the plunger 13; the bottom of the central blind hole is connected to the pressure relief hole 15; a valve core 17 is movably arranged in the central blind hole; an adjusting plug 18 with a central hole is arranged at the inlet of the central blind hole; the valve core 17 can be Figure 6 a needle valve or Figure 7 a ball valve or other conventional structures.

[0072] The central blind hole and the pressure relief hole 15 serve as the overflow channel C.

[0073] A pump 1 is arranged at the input end of the pump unit 2.

[0074] A driving part 42 is arranged on one side of the plunger body 14, which can be a bias shaft or other components that can achieve linear driving motion;

[0075] As an introduction to the structure, a return spring 11 is arranged between the housing 4 and the plunger body 14;

[0076] A push plate 12 is arranged on the plunger body 14 to support the return spring 11.

[0077] The lubricant supply channel B is a central hole, which is convenient for processing and manufacturing;

[0078] The housing 4 has a connecting shaft section, and a sealing gasket 5 is arranged on one side of the connecting shaft section to achieve sealing;

[0079] A communication channel, a sealing through hole, an installation channel and a threaded channel are sequentially arranged in the lubricant supply channel B;

[0080] An adjusting nut 6 is arranged in the threaded channel, and a valve stem 10 is fitted in the sealing through hole;

[0081] The sealing through hole is in conical sealing with the valve stem 10; a spring seat 8 is arranged on the valve stem 10;

[0082] A secondary spring 7 is arranged between the spring seat 8 and the adjusting nut 6;

[0083] The adjusting nut 6 is provided with a guiding process hole for the valve stem 10;

[0084] A sealing ring 9 is arranged on the valve stem 10.

[0085] The output end of the lubricant supply channel B is connected to an outlet joint 3, and an overflow valve spring 16 is connected between the valve core 17 and the stepped surface of the central blind hole;

[0086] The spring force of the secondary spring 7 is greater than that of the overflow valve spring 16, thereby achieving one-way sealing and precise discharge.

[0087] When the pump 1 starts to work, the plunger 13 reciprocates, and the lubricant in the lubricant storage chamber 25 is sucked into the pump unit 1 and discharged through the outlet joint 3.

[0088] When the outlet pressure is too high, the valve core 17 in the plunger 13 opens, and the overflow lubricant returns to the lubricant storage chamber 25 through the pressure relief hole 15.

[0089] The housing 4 is clamped by means of an auxiliary tooling for one-time clamping and assembly.

[0090] Such as Figures 7-9 , the auxiliary tooling of the lubricant pumping unit in this embodiment includes a support frame 28 as a support; for the assembly process of the above-mentioned supporting lubricant pumping unit.

[0091] A fixed base 30 is arranged in the middle of the support frame 28; as a coordinate reference, it is convenient to unify with the coordinates of the robotic arm.

[0092] Longitudinal rails 29 are arranged on the support frame 28 on both sides of the fixed base 30; thus facilitating linear motion and only retaining the longitudinal degree of freedom.

[0093] Longitudinal push rods 31 are arranged on both sides of the fixed base 30, thereby realizing the pulling effect on the center tips.

[0094] A longitudinal top seat 32 driven by the longitudinal push rod 31 is arranged on the longitudinal rail 29, thereby realizing automatic centering.

[0095] A first V-block 33 and a second V-block 34 are adjustably arranged at the placement station 36 of the fixed base 30.

[0096] The first V-block 33 and the second V-block 34 are used under the longitudinally placed housing 4 of the bracket.

[0097] A clamping manipulator 35 controlled by a robotic arm is provided on one side of the fixed base 30. As an innovation, compared with the traditional method of positioning using the center hole, when assembling the left and right sides, secondary clamping is required, while in the present invention, lateral clamping is adopted, thereby realizing simultaneous left and right assembly, eliminating the need to replace the manipulator and avoiding secondary clamping.

[0098] A center tip 37 is arranged on the longitudinal top seat 32 to achieve auxiliary centering without the need for secondary alignment.

[0099] The clamping manipulator 35 includes a clamping head 38; a fixed side arm is arranged on one side of the clamping head 38 and a movable side arm 39 is arranged on the other side; of course, it can also be that both are movable arms.

[0100] The movable side arm 39 is used to move closer to or farther away from the fixed side arm to clamp or release the housing 4; during the self-centering process, the robot arm controls the movement of the fixed arm and the simultaneous movement of the movable arm.

[0101] The housing 4 has a circular cylindrical or hexagonal cylindrical shape concentric with the lubricant supply passage B, thereby achieving centering;

[0102] V-shaped fingers 40 are provided on the inner side walls of the movable side arm 39 and the fixed side arm to achieve initial positioning;

[0103] The clamping head 38 is connected with a connecting cone handle 41 to facilitate positioning and connection.

[0104] The auxiliary assembly method of the lubricant pumping unit of this embodiment is based on the auxiliary tooling mentioned above; the auxiliary assembly method includes the following steps:

[0105] Step 1: Place the housing 4 on the first V-seat 33 and the second V-seat 34;

[0106] Step 2: The longitudinal push rod 31 pulls the longitudinal top seats 32 on both sides to move toward each other, thereby contacting the two ends of the housing 4;

[0107] Step 3: The movable side arm 39 approaches the clamping fixed side arm, thereby clamping the outer wall of the housing 4, and at the same time, the first V seat 33 and the second V seat 34 move outward to both sides; at the same time, the fixed side arm is controlled and moved simultaneously by the robot arm;

[0108] Step 4, determining the center height of the housing 4 by using the V-shaped finger 40;

[0109] Step 5: The robot arm clamps the shell 4 to the assembly station to form a shell 4 assembly;

[0110] Step six, assemble the housing 4 onto the pump 1.

[0111] In step five, first, the pre-assembled valve stem 10 is assembled at the right end of the housing 4;

[0112] Among them, the pre-installed valve stem 10 is pre-assembled with the spring seat 8, the secondary spring 7 and the adjusting nut 6 components;

[0113] Then, at the left end of the housing 4, the plunger body 14 assembly is assembled.

[0114] The safety overflow valve and the lubricant return device of the present invention are built-in, highly integrated and compact in structure; they are basically maintenance-free; the present invention can be used in progressive pumps and lubrication systems;

[0115] The present invention is fully described for a clearer disclosure, and the prior art is not listed one by one.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; as those skilled in the art, it is obvious to combine multiple technical solutions of the present invention. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. The technical content not described in detail in the present invention is all well-known technology.

Claims

1. A lubricant pumping unit with built-in pressure relief function, characterized in that: The pump unit (2) comprises a housing (4) having a cavity (43); three channels connected to the cavity (43) are built into the housing (4); one channel is connected to the input side of the lubricant, one channel is connected to the lubricant supply channel B at the discharge end, and one channel is connected to the overflow end. A plunger 1 (13) is movably arranged in the lubricant supply channel B; the movable plunger 1 (13) is used to open or block the input channel A and the lubricant supply channel B, and at the same time, the plunger 1 (13) expands or squeezes the space of the cavity (43); The plunger 1 (13) comprises a plunger body (14); a pressure relief hole (15) is radially arranged on the plunger body (14); A central blind hole is provided in the plunger (13); the bottom of the central blind hole is connected to the pressure relief hole 15; a valve core (17) is movably provided in the central blind hole; and an adjusting plug (18) with a central hole is provided at the inlet of the central blind hole; The central blind hole and the pressure relief hole (15) serve as an overflow channel C.

2. The lubricant pumping unit with built-in pressure relief function according to claim 1, characterized in that: A pump 1 (1) is arranged at the input end of a pump unit 1 (2).

3. The lubricant pumping unit with built-in pressure relief function according to claim 1 or 2, characterized in that: A driving member (42) is provided on one side of the plunger body (14); A return spring (11) is arranged between the housing (4) and the plunger body (14); A push plate (12) is arranged on the plunger body (14) for supporting a return spring (11).

4. The lubricant pumping unit with built-in pressure relief function according to claim 1, characterized in that: The lubricant channel B is the center hole; The housing (4) has a connecting shaft section, and a sealing gasket (5) is arranged on one side of the connecting shaft section; A connecting channel, a sealing through hole, a mounting channel and a threaded channel are sequentially arranged in the lubricant supply channel B; An adjusting nut (6) is arranged in the threaded passage, and a valve stem (10) is matched in the sealing through hole; The sealing through hole is sealed with the conical surface of the valve stem (10); a spring seat (8) is arranged on the valve stem (10); A secondary spring (7) is arranged between the spring seat (8) and the adjusting nut (6); The adjusting nut (6) is provided with a guide process hole for the valve stem (10); A sealing ring (9) is arranged on the valve stem (10).

5. The lubricant pumping unit with built-in pressure relief function according to claim 4, characterized in that: An outlet connector (3) is connected to the output end of the lubricant channel B, and an overflow valve spring (16) is connected between the valve core (17) and the step surface of the central blind hole; The spring force of the secondary spring (7) is greater than the spring force of the overflow valve spring (16).

6. The lubricant pumping unit with built-in pressure relief function according to claim 5, characterized in that: When the pump unit 1 (1) starts to work, the plunger 1 (13) reciprocates, and the lubricant in the lubricant storage chamber (25) is sucked into the pump unit 1 (2) and discharged through the outlet connector (3); When the outlet pressure is too high, the valve core (17) in the plunger (13) opens, and the overflowing lubricant returns to the lubricant storage chamber (25) through the pressure relief hole (15).

7. The lubricant pumping unit with built-in pressure relief function according to claim 6, characterized in that: The housing (4) is clamped and assembled at one time by means of auxiliary tooling.

8. An auxiliary tooling for a lubricant pumping unit, characterized in that: It comprises a support frame (28); an assembly process for the matching lubricant pumping unit as described in claim 1; A fixed base (30) is provided in the middle of the supporting frame (28); A longitudinal track (29) is arranged on the supporting frame (28) and is located on both sides of the fixed base (30); Longitudinal push rods (31) are arranged on both sides of the fixed base (30); A longitudinal top seat (32) is arranged on the longitudinal track (29) and is moved by being pulled by a longitudinal push rod (31); A first V-seat (33) and a second V-seat (34) are adjustably arranged at a placement station (36) of the fixed base (30); The first V-seat (33) and the second V-seat (34) are used under the housing (4) where the bracket is placed longitudinally; A gripping manipulator (35) controlled by a mechanical arm is provided on one side of the fixed base (30); A top head (37) is arranged on the longitudinal top seat (32); The clamping manipulator (35) comprises a clamping head (38); a fixed side arm is arranged on one side of the clamping head (38) and a movable side arm (39) is arranged on the other side; The movable side arm (39) is used to move closer to or farther away from the fixed side arm to clamp or release the housing (4); The housing (4) has a circular cylindrical or hexagonal cylindrical shape concentric with the lubricant supply passage B; V-shaped fingers (40) are arranged on the inner side walls of the movable side arm (39) and the fixed side arm; The clamping head (38) is connected with a connecting cone handle (41).

9. An auxiliary assembly method for a lubricant pumping unit, characterized in that: With the aid of the auxiliary tooling as claimed in claim 8; it is characterized in that: the auxiliary assembly method comprises the following steps; Step 1, placing the housing (4) on the first V-seat (33) and the second V-seat (34); Step 2: The longitudinal push rod (31) pulls the longitudinal top seats (32) on both sides to move in opposite directions, thereby contacting the two ends of the shell (4); Step 3: The movable side arm (39) approaches the fixed side arm to clamp the outer wall of the shell (4), and at the same time, the first V seat (33) and the second V seat (34) move outward to both sides; Step 4, determining the center height of the housing (4) by using the V-shaped finger (40); Step 5: The robot arm clamps the shell (4) to the assembly station to form a shell (4) assembly; Step 6: Assemble the housing (4) onto the pump 1 (1).

10. The auxiliary assembly method of the lubricant pumping unit according to claim 9, characterized in that: In step five, first, assemble the pre-assembled valve stem (10) at the right end of the housing (4); The pre-installed valve stem (10) is pre-assembled with a spring seat (8), a secondary spring (7) and an adjusting nut (6) assembly; Then, the plunger body (14) assembly is assembled at the left end of the housing (4).

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