WO2014106392A1

WO2014106392A1 - Lubricating grease delivery system of coal mine rail transportation vehicle

Info

Publication number: WO2014106392A1
Application number: PCT/CN2013/083196
Authority: WO
Inventors: 程延海; 朱真才; 王娜; 黄日恒; 陈国安; 韩振铎
Original assignee: 中国矿业大学
Priority date: 2013-01-04
Filing date: 2013-09-10
Publication date: 2014-07-10
Also published as: CN103047529A

Abstract

Disclosed is a lubricating grease delivery system of a coal mine rail transportation vehicle, comprising an oil reservoir (1) and an oil pump (2). An outlet pipeline of the oil pump (2) is divided into two branches via a T joint, wherein an electromagnetic reversing valve (3), a manual three-position four-way reversing valve (5) and an energy accumulator (4) are connected in sequence on one branch, inlet and outlet pipelines of the manual three-position four-way reversing valve (5) are connected with a composite hydraulic cylinder a, and the front part of the composite hydraulic cylinder a is connected with a grease reservoir (6);a first one-way speed control valve (9) and a three-position four-way electromagnetic reversing valve (10) are arranged in sequence on the other branch, and inlet and outlet pipelines of the three-position four-way reversing valve (10) are connected with a composite hydraulic cylinder b; a lubricating grease outlet of the composite hydraulic cylinder a is connected with a one-way valve bridge (8) through a pipeline, and pipelines on two sides of the one-way valve bridge (8) are respectively connected to a lubricating grease inlet and a lubricating grease outlet of the composite hydraulic cylinder b; and two limiters for limiting the travel of a piston rod are arranged at the front part of the piston rod of the composite hydraulic cylinder b. The lubricating grease delivery system completes the delivery of lubricating grease by means of alternating operations of the two composite hydraulic cylinders, and has the characteristics of small size, high pressure, high flow rate and stable operation.

Description

Coal mine rail transporter grease conveying system

Technical field

The invention relates to a grease conveying system, in particular to a conveying system suitable for grease of a coal mine rail transit vehicle in a low temperature environment.

Background technique

Mine transport vehicles are widely used in coal mines for the transportation of equipment, materials and even personnel. According to statistics, for a small and medium-sized mine with an annual output of 700,000 tons, there are thousands of such mine transport vehicles in service. At present, for the lubrication of such low-speed heavy-duty equipment, it is not suitable to use lubricating oil for lubrication, but a low-viscosity low-cone grease should be used, but although the low-cone grease has good lubricating properties, There are currently no equipment for delivering low-cone grease. At present, a manual refueling gun or a pedal-type mechanical fatliquoring machine is widely used for feeding grease. This method has small flow rate, low pressure, high labor intensity, poor concentration, and cannot be transported in a low temperature environment. When the ambient temperature is low, it can only be lubricated with a grease mixture with poor lubrication and good conveying performance. Therefore, these low-speed and heavy-duty transportation equipment often have serious problems of insufficient lubrication. On the one hand, it increases the traction of the locomotive and causes huge energy waste. On the other hand, it also increases wear and reduces the service life of the equipment.

technical problem

The object of the present invention is to overcome the deficiencies in the prior art, and to provide a grease transportation system for a coal mine rail transit vehicle with a simple structure and a large flow rate of output grease.

Technical solution

The lubricating oil conveying system of the coal mine rail transit vehicle of the invention comprises an oil storage device, an oil pump, a composite hydraulic cylinder and a b composite hydraulic cylinder. The oil storage device is connected to the oil pump via a pipeline, and the outlet pipeline of the oil pump is divided into two branches through the three links. Road, one branch is connected with electromagnetic reversing valve, manual three-position four-way reversing valve, accumulator, the manual three-way four-way reversing valve inlet and outlet pipeline connection a composite hydraulic cylinder, a composite hydraulic The front part of the cylinder is connected with a grease trap through the pipeline; the other branch is provided with a one-way speed regulating valve, a three-position four-way electromagnetic reversing valve, and an inlet and outlet pipe connection of the three-position four-way electromagnetic reversing valve. The hydraulic oil chamber inlet and outlet of the composite hydraulic cylinder; the grease outlet of the composite hydraulic cylinder is connected with a one-way valve bridge through the pipeline, and the pipelines on both sides of the one-way valve bridge are respectively connected to the grease inlet and outlet of the b composite hydraulic cylinder; Said bThe front of the piston rod of the composite hydraulic cylinder is provided with two stoppers for limiting the stroke of the piston rod;

The a composite hydraulic cylinder comprises a cylinder body composed of two cylinders of different diameters. The cylinder body is provided with a piston rod passing through cylinders of different diameters, and a piston rod on one side of the small diameter cylinder tube is provided with a small piston. 1. The piston rod on one side of the large-diameter cylinder tube is provided with a large piston one, and the two ends of the cylinder body are respectively provided with an upper cylinder head and a lower cylinder head, and the cylinder body passes through the upper cylinder head, the small piston, and the large piston. The lower cylinder head divides the composite hydraulic cylinder into three chambers; the three chambers are respectively provided with four inlet and outlet, the upper two inlet and outlet are hydraulic oil chamber inlet and outlet, and the lower two inlet and outlet are grease chambers. import and export;

The b-composite hydraulic cylinder comprises a cylinder body composed of two cylinders of different diameters. The cylinder body is provided with a piston rod passing through a cylinder wall between cylinders of different diameters, and is located on a piston rod on one side of the small-diameter cylinder tube. There is a small piston 2, and a piston rod on one side of the large-diameter cylinder tube is provided with a large piston 2, and two ends of the cylinder body are respectively provided with a left cylinder head and a right cylinder head, and a piston rod on one side of the large-diameter cylinder tube is worn. Out of the right cylinder head, the cylinder body is divided into four chambers by the left cylinder head, the small piston two, the cylinder wall between the cylinders of different diameters, and the large piston two, and the two chambers on the left side are grease The cavity, the two chambers on the right side are hydraulic oil chambers, the left side of the b compound hydraulic cylinder is provided with a grease chamber inlet and outlet, and the right side of the b compound hydraulic cylinder is provided with a hydraulic oil chamber inlet and outlet.

A check valve is arranged at the outlet of the grease trap; a one-way speed regulating valve 2 is arranged on the inlet pipe of the three-position four-way electromagnetic reversing valve.

Beneficial effect

The invention adopts hydraulic power to be pressurized, and is pressurized by a composite hydraulic cylinder, which can convey the low-cone grease, overcome the conveying resistance of the low-cone grease, and at the same time, after the pressure of the hydraulic cylinder is attenuated, continue to pass another The secondary pressurization of a composite hydraulic cylinder ensures that the two chamber branches of the hydraulic cylinder can alternately transport grease, and can complete the uninterrupted and large flow transmission of the grease with a taper degree of less than 265, which improves the conveying efficiency and ensures the reliable lubrication of the equipment. Sexuality, through the accumulator and one-way speed control valve to overcome the vibration of the system, to stabilize the balance of system work. It is especially suitable for the transportation of low-cone grease at low temperature. The output pressure can reach 20MPa, and the output grease flow rate is 0.3L/min. It is also suitable for the transportation of grease in other low-speed heavy-duty equipment under low temperature environment. The utility model has the advantages of simple structure, small volume, stable work, good use effect and wide practicality.

DRAWINGS

Figure 1 is a diagram of a delivery system of the present invention.

In the picture: 1-oil reservoir, 2-oil pump, 3-electromagnetic reversing valve, 4-accumulator, 5-manual three-position four-way reversing valve, 6-storage, 7-way valve, 8 - One-way valve bridge, 9-way one-way speed regulating valve, 11-one-way speed regulating valve two, 10-three four-way electromagnetic reversing valve, a, b-composite hydraulic cylinder.

Figure 2 is a structural view of a composite hydraulic cylinder a in the present invention.

In the picture: 12-upper cylinder head, 13-small piston one, 14-hole seal, 15-piston rod, 16-large piston one, 17-piston rod seal, 18-cylinder, 19-low cylinder head.

Figure 3 is a structural view of a composite hydraulic cylinder b in the present invention.

In the picture: 20-left cylinder head, 21-small piston two, 22-piston seal, 23-hole seal, 24-cylinder, 25-large piston two, 26-piston rod seal, 27-piston rod, 28- Shaft seal, 29-dust ring, 30-right cylinder head.

Embodiments of the invention

An embodiment of the present invention will be further described below with reference to the accompanying drawings:

As shown in Figure 1, the grease transfer system of the coal mine rail transit vehicle of the present invention mainly consists of an oil reservoir 1, an oil pump 2, an electromagnetic reversing valve 3, an accumulator 4, a manual three-position four-way reversing valve 5, and storage. The greaser 6, the check valve bridge 8 and the a, b composite hydraulic cylinders are formed. The oil pump 2 is connected to the oil reservoir 1 via a pipeline, and the oil pump 2 The outlet pipe is divided into two branches via a three-way, one of which is connected with an electromagnetic reversing valve 3, a manual three-position four-way reversing valve 5, an accumulator 4, and a manual three-position four-way reversing valve 5 The inlet and outlet pipes are connected with a composite hydraulic cylinder, and a front portion of the composite hydraulic cylinder is connected with a grease trap 6 via a pipeline, and a check valve 7 is arranged at an outlet pipe of the grease trap 6. The other branch road is provided with a one-way speed regulating valve one, a three-position four-way electromagnetic reversing valve 10, and an inlet and outlet pipeline of the three-position four-way electromagnetic reversing valve 10 connected with a hydraulic oil chamber of the b composite hydraulic cylinder. The outlet i, j, and the three-way four-way electromagnetic reversing valve 10 are provided with a one-way speed regulating valve II 11 on the inlet pipe. The lubricating oil outlet f of the a composite hydraulic cylinder is connected with a check valve bridge 8 through a pipeline, and the pipelines on both sides of the one-way valve bridge 8 are respectively connected to the grease inlets and outlets g, h of the b composite hydraulic cylinder; b The front of the piston rod of the composite hydraulic cylinder is provided with two stoppers SQ1 and SQ2 for restricting the stroke of the piston rod.

As shown in FIG. 2, the a composite hydraulic cylinder is composed of an upper cylinder head 12, a small piston 13, a hole seal 14, a piston rod 15, a large piston 16, a piston rod seal 17, a cylinder 18, and a lower cylinder head 19. composition. The cylinder block 18 is composed of two cylinders of different diameters. The cylinder block 18 is provided with a piston rod 15 passing through cylinders of different diameters. The piston rod 15 on one side of the small-diameter cylinder tube is provided with a small piston 13 which is located at a large A large piston 16 is disposed on the piston rod 15 on one side of the diameter cylinder tube. The upper end of the cylinder block 18 is respectively provided with an upper cylinder head 12 and a lower cylinder head 19, and the cylinder block 18 passes through the upper cylinder head 12 and the small piston 13 . The large piston-16 and the lower cylinder head 19 divide the composite hydraulic cylinder into three chambers; the three chambers are respectively provided with four inlets and outlets, and the upper two inlets and outlets are hydraulic oil chamber inlets and outlets c, d, lower The inlet and outlet ports of the two inlet and outlet grease chambers e, f, the inlet and outlet c of the first chamber are electrically connected through the upper cylinder head 12, and the inlets and outlets e, f of the third chamber are electrically connected through the cylinder block 18, and are stored. The outlet of the greaser 6 communicates with the inlet e on the cylinder 18 via the check valve 7, injects grease, and is pushed out from the outlet f by the action of the piston 16; the piston rod 15 is disposed in the cylinder 18, and is mounted in the cylinder 18 The upper cylinder head 12, the lower cylinder head 19, and the cylinder block 18 on both sides of the cylinder block 18 constitute a closed volume. A small piston 13 and a large piston 16 are mounted on both ends of the piston rod 15, respectively, and the volume of the cylinder is divided into three chambers. The large piston 16 , the small piston 13 and the cylinder 18 are sealed by a seal 14 device, and the piston rod 15 and the large piston 16 and the small piston 13 are sealed by a piston rod seal 17 device.

As shown in FIG. 3, the b composite hydraulic cylinder is composed of a left cylinder head 20, a small piston two 21, a piston seal 22, a hole seal 23, a cylinder block 24, a large piston two 25, a piston rod seal 26, and a piston rod. 27. The shaft seal 28, the dust seal 29, the rear cover 30, and the rear end cover seal 31 are formed. The cylinder block 24 is composed of two cylinders of different diameters. The cylinder block 24 is provided with a piston rod 27 passing through a cylinder wall between cylinders of different diameters. The piston rod 27 on one side of the small-diameter cylinder tube is provided with a small piston rod. 21, a piston rod 27 on one side of the large-diameter cylinder tube is provided with a large piston two 25, and two ends of the cylinder block 24 are respectively provided with a left cylinder head 20 and a right cylinder head 30, and a piston rod on one side of the large-diameter cylinder tube 27, the right cylinder head 30 is worn out, and the cylinder block 24 divides the b composite hydraulic cylinder into four chambers by the left cylinder head 20, the small piston two 21, the cylinder wall between the cylinders of different diameters, and the large piston two 25, left side The two chambers are grease chambers, the two chambers on the right side are hydraulic oil chambers, the left side of the b compound hydraulic cylinder is provided with grease chamber inlet and outlet g, h, and the right side of the composite hydraulic cylinder is provided with hydraulic oil chamber inlet and outlet. i, j. The hydraulic cylinders 24 of the two different diameter cylinders are connected by welding, the piston rods 27 pass through the cylinder wall between the cylinder blocks 24, and the holes placed in the cylinder walls are sealed and sealed by the seal 23. A piston 2 is mounted on the left end of the piston rod 27, a large piston 2 is mounted in the middle, a right end is extended from the cylinder, and the composite cylinder b is divided into four chambers with the left cylinder head 20, the right cylinder head 30, and the cylinder block 24. The small piston two 21, the large piston two 25 and the cylinder block 24 are sealed by a piston seal 22, and the piston rod 27 is sealed with the small piston two 21 and the large piston two 25 by a piston rod seal 26.

Working principle and process: the hydraulic pumping station pressurizes the hydraulic oil, and supplies power to the accumulator 4 through the electromagnetic reversing valve 3; the manual reversing valve 5 pushes the composite hydraulic cylinder to reciprocate up and down, thereby lubricating the inside of the accumulator 6. The grease is transported into the rodless cavity at the lower end of the composite hydraulic cylinder; the flow direction of the manual reversing valve 5 is switched, the hydraulic oil pushes the composite hydraulic cylinder downward, and the grease is pushed through the check valve bridge 8 to the b composite hydraulic cylinder to complete One pressurization; the left side pipeline is opened by the three-position four-way electromagnetic reversing valve 10, and the high-pressure oil pushes the piston in the b-combined hydraulic cylinder to the right through the check valve 11 until the piston rod touches the limit switch SQ2, The piston movement stops, completing the filling process of the b-composite hydraulic cylinder grease chamber; the three-position four-way electromagnetic reversing valve 10 reversingly opens the right pipeline, and the b composite hydraulic cylinder piston rod moves to the left to complete the secondary pressurization process. The grease is injected into the specified lubrication point via the check valve bridge 8. When the b composite hydraulic cylinder delivers the grease, the rodless cavity at the lower end of the composite hydraulic cylinder continues to suck in the grease through the grease trap 6, and alternately works through the two composite hydraulic cylinders to complete the grease conveying process.

The accumulator 4 is used in combination with a pressure relay as an auxiliary power. When the electromagnetic reversing valve 3 is closed, the accumulator 4 provides hydraulic power to the system and keeps the system stable. At the same time, the installation of the one-way

speed regulating valves

9, 11 on the system circuit can avoid the sudden change of load due to the rapid closing of the three-position four-way electromagnetic reversing valve 10.

Claims

A lubricating oil conveying system for coal mine rail transit vehicles, characterized in that it comprises an oil reservoir (1), an oil pump (2), a composite hydraulic cylinder, a b composite hydraulic cylinder, and an oil reservoir (1) connected to the oil pump via a pipeline ( 2) The outlet pipe of the oil pump (2) is divided into two branches via a three-way, and one branch is connected with an electromagnetic reversing valve (3), a manual three-position four-way reversing valve (5), and an accumulator. (4) The inlet and outlet of the manual three-position four-way reversing valve (5) is connected to a composite hydraulic cylinder, and the front part of the composite hydraulic cylinder is connected with a grease trap (6) through the pipeline; the other branch road In turn, one-way speed regulating valve (9), three-position four-way electromagnetic reversing valve (10), three-way four-way electromagnetic reversing valve (10) inlet and outlet pipeline connection b hydraulic cylinder of hydraulic cylinder Import and export (i, j); the grease outlet of the a composite hydraulic cylinder is connected with a one-way valve bridge (8) through the pipeline, and the lubrication of the composite hydraulic cylinder is connected to the pipelines on both sides of the one-way valve bridge (8) Fat import and export (g, h); bThe front of the piston rod of the composite hydraulic cylinder is provided with two stoppers for limiting the stroke of the piston rod;

The composite hydraulic cylinder includes a cylinder (18) composed of two cylinders of different diameters, and a cylinder rod (15) passing through cylinders of different diameters is disposed in the cylinder (18), and the cylinder is located in a small diameter cylinder. The piston rod (15) on the side is provided with a small piston (13), and the piston rod (15) on one side of the large-diameter cylinder tube is provided with a large piston (16), and the two ends of the cylinder body (18) are respectively provided There is an upper cylinder head (12) and a lower cylinder head (19), and the cylinder block (18) passes through the upper cylinder head (12), the small piston one (13), the large piston one (16), and the lower cylinder head (19). The composite hydraulic cylinder is divided into three chambers; three chambers are respectively provided with four inlet and outlet, the upper two inlet and outlet are hydraulic oil chamber inlet and outlet (c, d), and the lower two inlet and outlet are grease chambers. Import and export (e, f);

The b-composite hydraulic cylinder comprises a cylinder block (24) composed of two cylinders of different diameters, and the cylinder block (24) is provided with a piston rod (27) passing through a cylinder wall between cylinders of different diameters, which is located at a small The piston rod (27) on one side of the diameter cylinder tube is provided with a small piston two (21), and the piston rod (27) on one side of the large diameter cylinder tube is provided with a large piston two (25), and the cylinder body (24) The left cylinder head (20) and the right cylinder head (30) are respectively disposed at two ends, the piston rod (27) on one side of the large diameter cylinder tube passes through the right cylinder head (30), and the cylinder body (24) passes through the left cylinder head (20), small piston two (21), cylinder wall between different diameter cylinders, large piston two (25) divided b composite hydraulic cylinder into four chambers, the left two chambers are grease chambers, The two chambers on the right side are hydraulic oil chambers, the left side of the b compound hydraulic cylinder is provided with grease chamber inlet and outlet (g, h), and the right side of the b compound hydraulic cylinder is provided with hydraulic oil chamber inlet and outlet (i, j).
A grease transfer system for a coal mine rail transit vehicle according to claim 1, characterized in that a check valve (7) is provided at the outlet of the grease trap (6).
The grease conveying system for a coal mine rail transit vehicle according to claim 1, characterized in that: the three-way four-way electromagnetic reversing valve (10) is provided with a one-way speed regulating valve on the inlet pipe (11) ).