Plunger synchronous lubricating device and using method

Abstract

The invention relates to the technical field of lubricating devices, in particular to a plunger synchronous lubricating device and a using method. Two grease inlets and two grease outlets are formed in the main body valve block; the hydraulic system is composed of two hydraulic cylinders which are symmetrically arranged; the hydraulic cylinder comprises an external end cover and an internal movable plunger; an inner sleeve is arranged on the connecting side of the end cover; the movable plunger is connected into the inner sleeve in a sliding mode. A hydraulic oil port is formed in the tail part of the end cover; the connecting side of the end cover is hermetically connected with the main body valve block; the inner sleeve is fixed in the main body valve block; working oil cavities, namely a first working oil cavity and a second working oil cavity, are formed between the inner sleeve and the main body valve block; the working oil cavities are respectively communicated with the corresponding oil inlets and outlets; the high-pressure lubricating device is low in fault rate, long in durability, capable of avoiding faults caused by electrical control, capable of being applied to occasions needing high-pressure and large-flow lubrication and wide in application range.

Description

Technical Field

[0001] The invention relates to the technical field of lubrication devices, and in particular to a plunger synchronous lubrication device and a use method thereof. Background Art

[0002] Existing lubrication pumps are usually powered by electric motors, which convert electrical energy into mechanical energy to drive the pump body. They have the advantages of high automation and reduced manual operation. However, electric lubrication pumps have certain requirements for ambient temperature. Too high or too low temperature may affect their performance. They are very dependent on external stable circuits, prone to failures, low durability, and difficult to troubleshoot and repair. Their installation environment and location need to be carefully considered. Therefore, electric lubrication pumps are generally installed in places with suitable ambient temperature, less dust, less vibration, easy adjustment, inspection, maintenance and grease filling. They are not suitable for harsh environments such as high pressure and large flow lubrication. Their scope of use is severely limited, and improper installation and maintenance may cause equipment failures and increase maintenance costs. This may lead to extended equipment downtime and affect production efficiency. Summary of the invention

[0003] The purpose of the present application is to provide a plunger synchronous lubrication device and a method of use, aiming to solve the problems in the prior art.

[0004] The embodiment of the present application provides a plunger synchronous lubrication device, including a main valve block and a hydraulic system on both sides; the main valve block is provided with two grease inlets and two grease outlets, which are respectively a first grease inlet, a first grease outlet, a second grease inlet and a second grease outlet; the first grease outlet and the second grease outlet are provided with a one-way valve; the hydraulic system is composed of two symmetrically arranged hydraulic cylinders; the hydraulic cylinder includes an external end cover and an internal movable plunger; the end cover connection side is provided with an inner sleeve; the movable plunger is slidably connected to the inner sleeve; a hydraulic oil port is provided at the tail of the end cover; the hydraulic oil port is located on the left and right sides of the hydraulic system, and is divided into a left hydraulic port and a right hydraulic port; the end cover connection side is sealed and connected to the main valve block; the inner sleeve is fixed in the main valve block; a working oil chamber is formed between the inner sleeve and the main valve block, which are respectively a first working oil chamber and a second working oil chamber; the working oil chambers are respectively connected to the corresponding grease inlets and outlets; the end cover is inside a movable oil chamber; the movable oil chamber is connected to the hydraulic oil port.

[0005] Furthermore, the left hydraulic port and the right hydraulic port are connected to the A port and the B port of the electromagnetic reversing valve assembly.

[0006] Furthermore, an O-ring is provided on the contact surface between the movable plunger and the inner sleeve; an O-ring is provided on the contact surface between the end cover and the main valve block; and an ED ring is provided at the connection between the inner sleeve and the main valve block.

[0007] Furthermore, a compression spring is provided on the outer side of the movable plunger; and the tail of the movable plunger is fixedly connected to the top cover.

[0008] Furthermore, two pressure gauge interfaces are provided on the top of the main valve block.

[0009] A method for using a plunger synchronous lubrication device, wherein the left hydraulic port and the right hydraulic port on both sides of the hydraulic system of the device are connected to the A port and the B port of the electromagnetic reversing valve assembly, and the hydraulic oil inlet and return states of the hydraulic cylinders on both sides are switched through the electromagnetic reversing valve assembly to control the inlet and outlet of the hydraulic oil: when the left hydraulic port is the oil inlet and the right hydraulic oil is the oil outlet, the hydraulic oil enters the active oil chamber from the left hydraulic port, pushes the top cover and the active plunger to be compressed to the right, and the lubricating oil in the first working oil chamber is discharged from the first grease outlet on the main valve block to complete the oil outlet work; the compression spring in the right hydraulic cylinder pushes the active plunger to reset to the right direction, and the hydraulic oil in the right active oil chamber flows out from the right hydraulic port, and at the same time of resetting, the lubricating oil in the second working oil chamber enters the working oil chamber from the second grease inlet of the main valve block to complete the oil replenishment action; then the inlet and outlet states of the left and right hydraulic ports are changed, and the above actions are performed in opposite directions, the lubricating oil enters the first working oil chamber from the first grease inlet, and the lubricating oil in the second working oil chamber flows out from the second grease outlet; the above two states are repeated and alternated to achieve the oil supply effect.

[0010] The beneficial effects of the present invention are as follows: the present invention uses hydraulic oil to push the internal plunger to move the plunger toward the inside of the device, and the hydraulic oil in the hydraulic oil inlet and return ports of the synchronous hydraulic lubrication pump valve body are reversed by the electromagnetic reversing valve, and each movement of the plunger of the synchronous hydraulic lubrication pump valve body will squeeze out a certain amount of grease toward the oil outlet. Compared with the electric lubrication pump, the present invention has a low failure rate and long durability of the lubrication valve body, and also avoids failures caused by electrical control. It can be used in occasions requiring high-pressure and large-flow lubrication, such as heavy machinery and equipment, and is less affected by the environment and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention.

[0012] Figure 2 This is a schematic diagram of the oil circuit when the hydraulic oil enters from the left and exits from the right.

[0013] Figure 3 This is a schematic diagram of the oil circuit when the hydraulic oil exits from the left and enters from the right.

[0014] Figure 4 This is the connection circuit diagram of the two-position four-way solenoid reversing valve in the initial state.

[0015] In the figure:

[0016] 1. Compression spring; 2. End cover; 3. Main valve block; 4. Top cover; 5. Movable plunger; 6. Inner sleeve; 7. O-ring; 8. ED ring; 9. First grease port; 10. Second grease port; 11. First working oil chamber; 12. Second working oil chamber; 13. Left hydraulic port; 14. Right hydraulic port; 15. Movable oil chamber; 16. First grease outlet; 17. Second grease outlet. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figure 1 A plunger synchronous lubrication device shown in the figure comprises a main valve block 3 and hydraulic systems on both sides; the main valve block 3 is provided with two grease inlets and two grease outlets, which are a first grease inlet 9, a first grease outlet 16, a second grease inlet 10 and a second grease outlet 17; the first grease outlet 16 and the second grease outlet 17 are provided with a one-way valve to prevent the oil flow from flowing in the opposite direction; the hydraulic system is composed of two symmetrically arranged hydraulic cylinders; the hydraulic cylinder comprises an external end cover 2 and an internal movable plunger 5; an inner sleeve 6 is provided on the connecting side of the end cover 2; the movable plunger 5 is slidably connected inside the inner sleeve 6; a hydraulic oil port is provided at the tail of the end cover 2; The hydraulic oil port is located on the left and right sides of the hydraulic system, and is divided into a left hydraulic port 13 and a right hydraulic port 14; the connection side of the end cover 2 is sealed and connected to the main valve block 3; the inner sleeve 6 is fixed in the main valve block 3; a working oil chamber is formed between the inner sleeve 6 and the main valve block 3, which are the first working oil chamber 11 and the second working oil chamber 12 respectively; the working oil chambers are connected to the corresponding grease inlets and outlets respectively; the first working oil chamber 11 is connected to the first grease inlet 9 and the first grease outlet 16, and the second working oil chamber 12 is connected to the second grease inlet 10 and the second grease outlet 17; the interior of the end cover 2 is a movable oil chamber 15; the movable oil 15 is connected to the hydraulic oil port.

[0019] The left hydraulic port 13 and the right hydraulic port 14 are connected to the A port and the B port of the electromagnetic reversing valve assembly; the hydraulic oil inlet and return states on both sides of the synchronous hydraulic lubrication pump valve body are switched through the electromagnetic reversing valve assembly; the hydraulic oil in the oil tank is centrally pumped to the main oil inlet of the electromagnetic reversing valve through the oil circuit, and the reversing valve will perform oil circuit switching according to the set parameters. The system sets a fixed reversing time. For example, when the left hydraulic port is the oil inlet and the right hydraulic port is the oil return port at the beginning, the left hydraulic port of the hydraulic system is connected to the A port, and the right hydraulic port is connected to the B port. The left hydraulic port enters the hydraulic oil for pressurization, and the right hydraulic port discharges the hydraulic oil for pressure relief. When the system reaches the set reversing time, the left hydraulic port is the oil return port and the right hydraulic port is the oil inlet, the left hydraulic port is disconnected from A and connected to B port, the right hydraulic port is disconnected from B and connected to A port, so that the left hydraulic port discharges the hydraulic oil for pressure relief, and the right hydraulic port enters the hydraulic oil for pressurization.

[0020] The solenoid reversing valve generally adopts a two-position four-way solenoid reversing valve, which has two working positions and four oil ports, generally two inlets and two outlets. Figure 4 As shown, P is the oil inlet, T is the oil return port, A\B are connected to the upper and lower chambers of the actuator respectively. In the initial state position, P is connected to port A, T is connected to port B, and in the power-on state position, P is connected to port B, and T is connected to port A.

[0021] An O-ring 7 is provided on the contact surface between the movable plunger 5 and the inner sleeve 6; two are provided in total to prevent the hydraulic oil in the hydraulic system from entering the working oil chamber through the inner sleeve 6 and mixing with the grease, thereby reducing the lubrication effect and causing waste of the hydraulic oil in the hydraulic system. An O-ring 7 is provided on the interface between the end cover 2 and the main valve block 3; an ED ring 8 is provided at the junction of the inner sleeve 6 and the main valve block 3 to prevent leakage at the connection of parts when the equipment is under high pressure.

[0022] A compression spring 1 is disposed on the outer side of the movable plunger 5 ; the tail of the movable plunger 5 is fixedly connected to the top cover 4 , and the top cover 4 can move in the movable oil chamber 15 along with the movable plunger 5 .

[0023] The top of the main valve block 3 is provided with two pressure gauge interfaces (not shown in the figure) for detecting the internal pressure of the oil chamber.

[0024] The method for using the plunger synchronous lubrication device provided by the present invention is that the left hydraulic port 13 and the right hydraulic port 14 on both sides of the hydraulic system of the device are connected to the A port and the B port of the electromagnetic reversing valve assembly, and the hydraulic oil inlet and return states of the hydraulic cylinders on both sides are switched by the electromagnetic reversing valve assembly to control the inlet and outlet of the lubricating oil: Figure 2As shown, when the left hydraulic port 13 is the oil inlet and the right hydraulic oil 14 is the oil outlet, the hydraulic oil enters the active oil chamber 15 from the left hydraulic port 13, pushing the top cover 4 and the active plunger 5 to compress inward, squeezing the first working oil chamber 11, and the lubricating oil in the first working oil chamber 11 is discharged from the first grease outlet 16 on the main valve block 3, completing the oil outlet work; at the same time, the compression spring 1 in the right hydraulic cylinder pushes the active plunger 5 to reset outward, and the hydraulic oil in the right active oil chamber 15 flows out from the right hydraulic port 14, and at the same time of resetting, the external lubricating oil enters the second working oil chamber 12 from the second grease inlet 10 on the main valve block 3, completing the oil replenishment action; then the electromagnetic reversing valve assembly changes the oil inlet and outlet states of the left and right hydraulic ports, as shown in FIG. Figure 3 As shown, it is changed to left-out and right-in, and the above actions are performed in opposite directions. The lubricating oil enters the first working oil chamber 11 from the first grease inlet 9, and the lubricating oil in the second working oil chamber 12 flows out from the second grease outlet 17; the above two states are repeated and alternated to achieve the oil supply effect; during the initial operation, since there is no grease in the working oil chamber, the movable plunger 5 is initially actuated, and it is normal that there is no grease at the grease outlet. The plunger stroke is adjustable from 5 to 10 mm, and different amounts of grease can be squeezed out according to different plunger strokes.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A plunger synchronous lubrication device, characterized in that: It comprises a main valve block and a hydraulic system on both sides; the main valve block is provided with two grease inlets and two grease outlets, which are respectively a first grease inlet, a first grease outlet, a second grease inlet and a second grease outlet; the first grease outlet and the second grease outlet are provided with a one-way valve; the hydraulic system is composed of two symmetrically arranged hydraulic cylinders; the hydraulic cylinder comprises an external end cover and an internal movable plunger; an inner sleeve is provided on the connecting side of the end cover; the movable plunger is slidably connected inside the inner sleeve; a hydraulic oil port is provided at the tail of the end cover; the hydraulic oil port is located on the left and right sides of the hydraulic system, and is divided into a left hydraulic port and a right hydraulic port; the connecting side of the end cover is sealed and connected to the main valve block; the inner sleeve is fixed in the main valve block; a working oil chamber is formed between the inner sleeve and the main valve block, which are respectively a first working oil chamber and a second working oil chamber; the working oil chambers are respectively connected with the corresponding grease inlets and outlets; the inside of the end cover is a movable oil chamber; the movable oil chamber is connected with the hydraulic oil port.

2. The plunger synchronous lubrication device according to claim 1, characterized in that: The left hydraulic port and the right hydraulic port are connected to the A port and the B port of the electromagnetic reversing valve assembly.

3. The plunger synchronous lubrication device according to claim 1, characterized in that: An O-type sealing ring is arranged on the contact surface between the movable plunger and the inner sleeve; an O-type sealing ring is arranged on the connecting surface between the end cover and the main valve block; and an ED ring is arranged at the connection between the inner sleeve and the main valve block.

4. The plunger synchronous lubrication device according to claim 1, characterized in that: A compression spring is arranged on the outer side of the movable plunger; and the tail of the movable plunger is fixedly connected to the top cover.

5. The plunger synchronous lubrication device according to claim 1, characterized in that: Two pressure gauge interfaces are arranged on the top of the main valve block.

6. The method for using the plunger synchronous lubrication device according to claims 1-5, characterized in that: The left hydraulic port and the right hydraulic port on both sides of the hydraulic system of the device are connected to the A port and the B port of the electromagnetic reversing valve assembly, and the hydraulic oil inlet and return states of the hydraulic cylinders on both sides are switched through the electromagnetic reversing valve assembly to control the inlet and outlet of the hydraulic oil: when the left hydraulic port is the oil inlet and the right hydraulic oil is the oil outlet, the hydraulic oil enters the active oil chamber from the left hydraulic port, pushes the top cover and the active plunger to be compressed to the right, and the lubricating oil in the first working oil chamber is discharged from the first grease outlet on the main valve block to complete the oil outlet work; the compression spring in the right hydraulic cylinder pushes the active plunger to reset to the right direction, and the hydraulic oil in the right active oil chamber flows out from the right hydraulic port. At the same time of resetting, the lubricating oil in the second working oil chamber enters the working oil chamber from the second grease inlet of the main valve block to complete the oil replenishment action; then the inlet and outlet states of the left and right hydraulic ports are changed, and the above actions are performed in opposite directions, the lubricating oil enters the first working oil chamber from the first grease inlet, and the lubricating oil in the second working oil chamber flows out from the second grease outlet; the above two states are repeated and alternated to achieve the oil supply effect.

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