CN110630883A

CN110630883A - Ultrahigh pressure oil injector

Info

Publication number: CN110630883A
Application number: CN201910957994.9A
Authority: CN
Inventors: 冯强; 陶华祥; 孙国富
Original assignee: Shanghai Hamp Hydraulic Machinery Co Ltd
Current assignee: Shanghai Hamp Hydraulic Machinery Co Ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2019-12-31

Abstract

The invention discloses an ultrahigh-pressure oil injector which is characterized by comprising a bottom frame, wherein a pump body assembly and a pressure oil pot assembly which are of an integral structure are arranged on the bottom frame; the pressure oil can assembly is detachably connected with the oil suction port of the pump body assembly; the pressing opening is provided with a pressing device; the pressure port is connected with a pressure gauge; the pressure relief port is connected with a pressure relief valve assembly. According to the invention, a user does not need to assemble the hydraulic hose, the pump body assembly, the pressure gauge, the pressing handle, the pressure oil can assembly and the chassis are integrally assembled, and the user only needs to connect the hydraulic hose according to actual requirements.

Description

Ultrahigh pressure oil injector

Technical Field

The invention relates to an ultrahigh pressure oil ejector, in particular to an ultrahigh pressure oil ejector capable of meeting the highest pressure of 3500bar for using or working glycerol, and belongs to the technical field of high pressure oil injection.

Background

When shaft hole parts such as bearings, couplings, wheel sets, wheels, gears and the like which are in interference fit are disassembled and assembled, a process method of ultrahigh pressure oil injection disassembly and assembly is often adopted. When the components are disassembled and assembled, oil is injected between the shaft and the surface of the hub hole through the ultrahigh pressure oil injector to form an oil film, the surfaces of the shaft and the hub hole are separated, and the assembling and disassembling processes are carried out under the conditions of oil film separation and lubrication. The whole process is favorable for protecting the surfaces of the shaft and the hub hole

In the aspect of oil selection during ultrahigh-pressure oil injection and disassembly, oil with high viscosity is generally considered to be easy to form an oil film. The glycerol is a common oil in the industry, and is used as an ultrahigh-pressure oil injection medium when the existing coupling is disassembled and assembled through ultrahigh-pressure oil injection.

Because the viscosity of the glycerol is relatively high, the oil is difficult to be pumped into the cavity of the plunger piston of the oil injector due to the self-priming performance of the plunger piston of the oil injector, so that the glycerol oil in the oil injector needs to be pressurized to play a role of forced oil supply and make up for the defect of poor self-priming performance of the oil injector.

At present, the existing solution is that a spring piston is additionally arranged in an oil storage tank to play a role in pressurization, so that the defect that the oil ejector is difficult to absorb oil when encountering glycerol can be eliminated. However, prior art lubricators are supplied as discrete parts and require the user to wait for the assembly at the site. Need be in the same place the installation of these three parts of grease squirt body, manometer, oil pipe and conversion seat during the equipment, in order to ensure the regional formation of high-pressure seal, adorn the grease squirt body on the conversion seat earlier, twist oil pipe and manometer in proper order on the conversion seat again, if this process misoperation, not only can cause the practicality of grease squirt to leak, pressure can't be established. Even improper operation may cause the machined groove at the pressure gauge joint to be damaged by the tapered thread of the oil injector body, resulting in damage to the pressure gauge joint.

Therefore, problem 1 existing in the prior art: the assembly of the ultra-high pressure lubricator in the prior art is a significant problem. The product that prior art related must only can use through correct equipment after arriving user's scene, at first need will change the seat centre gripping in the bench vice during the equipment, again with on the grease squirt body rotates the conversion seat, when next assembling the manometer, need ensure the tapered cooperation of manometer joint and grease squirt body. Only after both are in the correct position is the tubing tightened. The operation above needs to have considerable hydraulic product assembly experience, if an operation error occurs, not only causes the oiler pressure to be unable to establish because of the existence of leakage points between the parts, but also causes the machined groove at the pressure gauge joint to be damaged by the conical thread top of the oiler body, and under the condition, the spare parts of the pressure gauge joint need to be purchased. The on-site production rhythm is delayed, and unnecessary spare part cost is increased.

Problem 2 still exists in the prior art: the pressing efficiency is low. The adopted plunger has a small diameter, and the displacement is 0.23cm during each pressing³And when the oil injection amount required by disassembling or press-mounting the workpiece is larger, the on-site pressing times are more.

Disclosure of Invention

The invention aims to solve the technical problems of installation and small displacement each time caused by the assembly design of the existing oil ejector.

In order to solve the technical problem, the technical scheme of the invention provides an ultrahigh pressure oil injector which is characterized by comprising a bottom frame, wherein a pump body assembly and a pressure oil pot assembly which are of an integral structure are arranged on the bottom frame; the pressure oil can assembly is detachably connected with the oil suction port of the pump body assembly; the pressing opening is provided with a pressing device; the pressure port is connected with a pressure gauge; the pressure relief port is connected with a pressure relief valve assembly.

Preferably, the pump body assembly comprises a pump body, and the oil passage is arranged in the pump body; an oil suction port one-way valve is arranged at the oil suction port; the pressurizing opening is provided with a containing cavity, a plunger body is arranged in the containing cavity, the plunger body is fixed on the pump body through a plunger body and a cap, the middle part of the plunger body is provided with a cavity, and the cavity is communicated with the oil duct passage and the outside; the pressing device comprises a connecting rod and a pressure arm; the connecting rod is fixedly connected with the pump body, and the front end of the pressure arm is connected with the connecting rod through a pin shaft; the middle part of the pressure arm is connected with one end of the plunger; the other end of the plunger is arranged in the cavity and sealed by the sealing element III, and the pressure arm drives the plunger to reciprocate along the direction of the cavity.

Preferably, the rear end of the pressure arm is connected with an elongated pressing handle.

Preferably, the oil outlet is provided with an oil outlet one-way valve, and the tail end of the oil outlet is connected with a conversion joint for converting a high-pressure hose.

Preferably, the pressure port is provided with a pressure gauge interface, and the pressure gauge interface is connected with a pressure gauge.

Preferably, the pressure oil pot component comprises an oil pot cover, an oil pot body and a pull handle rod, wherein the oil pot body is of a hollow structure, and the front end of the oil pot body is connected with the oil pot cover; the front end of the handle rod is arranged outside the oil can cover, the rear end of the handle rod is connected with the piston, and the piston is arranged inside the oil can body and is sealed with the inner wall of the oil can body through a second sealing element; a reset pressure spring is arranged in the oil kettle body, one end of the reset pressure spring props against the oil kettle cover, and the other end of the reset pressure spring props against the piston; the rear end of the oil pot body is contracted to form an oil supply port.

Preferably, the oil supply port is provided with an oil can one-way valve, the oil supply port is connected with an oil can adapter, and the oil supply port is connected with the oil suction port through the oil can adapter.

Preferably, a pressure relief oil path is arranged in the pump body assembly, the pressure relief oil path is communicated with a pressure relief opening and the outside, and the pressure relief opening is of a conical structure; the pressure relief valve assembly comprises a pressure relief knob, a pressure relief valve rod, a pressure relief valve cover, a first sealing piece and a steel ball, and the steel ball is arranged at the pressure relief opening and seals the pressure relief opening; pressure relief valve rod is connected with pump body subassembly fixed connection, pressure release knob, and pressure release valve rod and pressure release valve lid screw-thread fit seal through pressure release sealing member one, and pressure release valve rod front end stretches into inside and support the steel ball of pressure release valve lid.

The invention provides an integrated assembly-free ultrahigh pressure 3500bar oil injector adopting a pressure oil can. Besides the performance of the oil ejector related to the prior art, the assembly preparation work before the oil ejector is used is simplified, and the pressing efficiency is improved.

The effect is as follows: the invention can meet the use requirement of injecting high-viscosity (with the kinematic viscosity of 900mm2/s) oil at the highest pressure of 3500bar when the interference fit parts are disassembled and assembled. Different from a common high-pressure manual pump, the hydraulic oil filling device can only meet the ultrahigh-pressure oil filling requirements of common 32#, 46# and 68# hydraulic oil. The surface of the shaft hole is better protected from being scratched by injecting high-viscosity oil.

The second effect is that: the invention adopts an integral design, and compared with the prior art, the invention adopts the form of parts of the like products. The operation steps of field assembly of a user are eliminated, and the delay of the construction period and the cost of newly purchased parts caused by failure of a new product due to insufficient experience are effectively reduced.

The effect is three: compared with similar products, the invention has the advantage of improving the working efficiency. Is characterized in that the displacement per stroke is 0.6cm³Compared with the foreign similar products, the discharge capacity per stroke is 0.23cm³. Thus, the working efficiency is improved.

Drawings

FIG. 1 is a schematic view of an ultra-high pressure lubricator assembly provided in the present embodiment;

FIG. 2 is a schematic sectional view of a pump body of the extra-high pressure lubricator provided in the present embodiment;

FIG. 3 is a schematic view of a pump body assembly of the ultra-high pressure lubricator provided in the present embodiment;

FIG. 4 is a schematic view of a relief valve assembly of the ultra-high pressure lubricator provided in the present embodiment;

fig. 5 is a schematic view of a pressure oil can assembly of the ultrahigh-pressure oil lubricator provided in the embodiment.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

The invention relates to an ultrahigh-pressure oil injector which mainly comprises the following components: the pump body subassembly 1, manometer 2, pressure relief valve subassembly 3, pressure oilcan subassembly 4, chassis 5, suppress handle 6.

The pump body assembly 1 and the pressure oil can assembly 4 are arranged on the underframe 5, an oil can interface 116 matched with the pressure oil can assembly 14 is arranged outside an oil suction port of the pump body assembly 1, and the oil can interface 116 is connected with the pressure oil can assembly 4 in a detachable manner; the oil suction port is the starting end of an oil passage in the pump body assembly 1, the oil passage is also provided with a pressurizing port, a pressure relief port and an oil outlet, the outer side of the pressurizing port is provided with a plunger installation technical hole 117 capable of installing parts such as the plunger body 112 and the like, and the plunger installation technical hole 117 is connected with a pressurizing device; a pressure gauge interface 17 matched with the pressure gauge 2 is arranged outside the pressure port, and the pressure gauge interface 17 is connected with the pressure gauge 2; the oil outlet is a pressure outlet 118, and the pressure outlet 118 is connected with a high-pressure hose through the adapter 18.

The pump body assembly 1 mainly includes: the oil pump comprises a pressure arm 11, two pin shafts 12, a connecting piece 13, a plunger 14, a connecting rod 15, a fixed pin shaft 16, a conversion joint 18, a pump body 19, an oil outlet one-way valve 110, an oil suction one-way valve 111, a plunger body 112, a plunger body combining cap 113, a sealing piece III 114 and a shackle 115. The pump body 19 is a body of the pump body assembly, and the oil passage is arranged in the pump body 19; the oil suction port check valve 111 is installed at the oil suction port; the oil outlet one-way valve 110 is arranged at the oil outlet; a plunger installation technical hole 117 outside the pressurizing opening is provided with a cavity, a plunger body 112 is installed in the cavity, the plunger body 112 is fixed on the pump body 19 through a plunger body and cap 113, a cavity is arranged in the middle of the plunger body 112, and the cavity is communicated with the pressurizing opening and an oil passage and the outside; the connecting rod 15, the pressure arm 11 and the plunger 14 form a pressing device; the connecting rod 15 is fixedly connected with the pump body 19 through a fixed pin shaft 16 to provide support, and the front end of the pressure arm 11 is connected with the connecting rod 15 through a pin shaft 12; the middle part of the pressure arm 11 is connected with one end of a plunger 14 through a connecting piece 13 and another pin shaft 12, the plunger 14 is driven to move upwards when the pressure arm 11 is lifted, and the plunger 14 is driven to move downwards when the pressure arm 11 is pressed downwards; the other end of the plunger 14 penetrates through the cavity to enter the pressurizing opening, in order to prevent oil leakage of the cavity, a gap between the plunger 14 and the cavity is sealed by a third sealing element 114, and the pressure arm 11 drives the plunger 14 to reciprocate along the cavity direction to perform pressurizing operation. The shackle 115 is fixed on the pump body 19 and plays a role of locking the pressure arm 11, when the oil injector needs to be carried, the shackle 115 is hooked on the pressure arm 11, the pressure arm 11 cannot act and can be used as a lifting handle, when the oil injector works, the shackle 115 is unlocked from the pressure arm 11, and the pressure arm 11 can be pressed. In order to ensure that the pressing operation is more labor-saving, the rear end of the pressure arm 11 can be provided with the lengthened pressing handle 6, and the pressing handle 6 is inserted on the pressure arm 11 and used for increasing the force arm during the pressing operation and playing a role in saving labor.

The working process of the pump body assembly 1 is described as follows: the pressure arm 11 is lifted to drive the plunger 14 to move upwards, the space in the cavity of the plunger body 112 is increased, and oil is sucked into the cavity of the plunger body 112 from the pressure oil can assembly 4 through the oil suction port one-way valve 111. The plunger 14 is driven to move downwards by pressing down the pressure arm 11, and the connecting rod 15 arranged on the pump body 19 is used as a counter-acting fulcrum for the downward movement of the plunger 14. The oil in the cavity of the plunger body 112 is pressed towards the oil outlet check valve 110 due to the downward extrusion of the plunger 14. In the oil outlet process, the oil cannot return to the pressure oil can assembly 4 due to the action of the oil suction port one-way valve 111. After passing through the outlet check valve 110, the oil passes through the crossover connection 18 to the high pressure hose.

The pressure gauge 2 is installed on the pump body 19 through a pressure gauge interface 17, and oil in an oil passage channel of the pump body 19 flows to the pressure gauge 2 through the pressure gauge interface 17 so as to display the outlet pressure of the pump body assembly 1. The pressure gauge 2 is used for displaying the working pressure output by the ultrahigh pressure oil injector, and the display unit is bar and psi.

The pressure relief valve assembly 3 performs the function of unloading, and comprises the following components: a pressure relief knob 31, a pressure relief valve rod 32, a pressure relief valve cover 33, a first sealing element 34 and a steel ball 35. A pressure relief oil path is reserved on the pump body 19 and is communicated with a pressure relief port and the outside, the pressure relief port is of a conical structure, and the steel ball 35 is initially positioned at the pressure relief port and blocks the pressure relief port; the pressure relief valve cover 33 is fixedly connected with the pump body assembly 1, the pressure relief knob 31 is connected with the tail end of the pressure relief valve rod 32, the pressure relief valve rod 32 is in threaded fit with the pressure relief valve cover 33 and is sealed through a pressure relief sealing piece 34, and the front end of the pressure relief valve rod 32 extends into the pressure relief valve cover 33 and abuts against the steel ball 35.

The pressure relief knob 31 needs to be tightened clockwise before the filler outlet pressure operates. The pressure relief knob 31 drives the pressure relief valve rod 32 to move with the thread of the pressure relief valve cover 33, and the steel ball 35 is pressed against the conical surface of the pressure relief opening in the pump body 19, so that the pressure relief oil path is sealed. When the oil injector needs to relieve pressure, the pressure relief knob 31 is unscrewed counterclockwise. The pressure relief knob 31 drives the pressure relief valve rod 32, the jacking force to the steel ball 35 is released through the mutual movement of threads with the pressure relief valve cover 33, the steel ball 35 is separated from the conical surface of the pressure relief opening in the pump body 19 under the action of the pressure of the oil line, oil returns to the pressure oil can assembly 4 through the pressure relief oil line in the pump body 19 through a gap between the steel ball 35 and the conical surface, the pressure relief oil line is communicated with the pressure relief opening and the oil suction opening, when the oil injector needs pressure relief, after the pressure relief knob 31 is unscrewed anticlockwise, the residual high pressure in the oil passage is greater than the jacking force of the reset pressure spring 44 in the pressure oil can assembly 4, and therefore the residual oil is forced back into the pressure oil can assembly 4 by.

The pressure oil can assembly 4 mainly comprises: the oil can comprises an oil can cover 41, a handle rod 42, an oil can body 43, a return compression spring 44, a piston 45, a second sealing element 46, a cover-shaped nut 47, an oil can one-way valve 48 and an oil can adapter 49. The oil pot body 43 is of a hollow structure, and the front end of the oil pot body 43 is connected with the oil pot cover 41; the handle at the front end of the handle rod 42 extends out of the oil can cover 41 to facilitate operation, the rear end of the handle rod is connected with the piston 45, the rear end of the handle rod 42 penetrates through a central hole of the piston 45, the cap-shaped nut 47 is combined with external threads at the rear end of the handle rod 42 through internal threads to play a role in fixing the handle rod 42 and the piston 45, and the piston 45 is installed inside the oil can body 43 and sealed with the inner wall of the oil can body 43 through a second sealing element 46; the reset pressure spring 44 is arranged between the oil can cover 41 and the piston 45 and provides elasticity for the piston 45; the rear end of the oil pot body 43 is contracted to form an oil supply port, an oil pot check valve 48 is arranged on the oil supply port, and an oil pot adapter joint 49 is connected outside the oil supply port so as to be connected with an oil pot interface 116 of the pump body 19. The function of the pressure oil can component 4 is two: the oil is stored and is supplied to the pump body 19 through the oil can interface 116, and the oil suction performance of the pump body 19 is improved.

The working process of filling the pressure oil can assembly 4 with oil is described as follows: an oil can adapter 49 of the pressure oil can assembly 4 is immersed in oil to be sucked, the handle rod 42 is pulled manually, the piston 45 moves towards the direction of the oil can cover 41 under the action of pulling force, a negative pressure state is formed in the oil can body 43 due to space increase, and the oil to be sucked flows into the oil can body 43 through the oil can one-way valve 48 under standard atmospheric pressure. After the oil is filled, residual air in the oil can body 43 is exhausted by pressing the oil can one-way valve 48, and the oil is filled completely. The oil can check valve 48 is pushed open by an external force applied to the pressure oil can assembly 4, so that the oil in the pressure oil can assembly 4 can flow out through the check valve. If the check valve 48 is not subjected to cracking pressure, the shut-off state is maintained. When venting is required, the pressurized oil can assembly 4 is placed vertically up (oil can adapter 49 up and handle bar 42 down). Due to the specific gravity of the air and the oil, the air will go to the upper end of the cavity of the pressure oil can assembly 4. At this time, the oil can check valve 48 is pressed, and after the opening pressure is reached, the internal cavity of the pressure oil can assembly 4 is communicated with the outside, and the air in the pressure oil can assembly 4 is pushed out under the action of the reset pressure spring 44. When oil overflows from the opening of the oil can one-way valve 48, the pressing force on the oil can one-way valve 48 is removed, and the air exhaust is finished.

The working process of supplying oil to the pressure oil can assembly 4 is described as follows: the pressurized oil can assembly 4, which is filled with oil, is screwed to the oil can connection 116 on the pump body 19 via the oil can adapter 49 at the end thereof. The end face of the oil can check valve 48 is pushed open after contacting the bottom surface of the oil can interface 116 and is in a connection state, and the oil in the oil can body 43 is supplied to the pump body 19 in a pressure mode under the driving force of the return pressure spring 44 through the piston 45.

The chassis 5 is used for bearing the pump body subassembly 1, manometer 2, pressure relief valve subassembly 3, pressure oilcan subassembly 4, and suppress handle 6. Plays a role in stabilizing during operation.

In conclusion, the pump body assembly 1, the pressure gauge 2, the pressing handle 6, the pressure oil can assembly 4 and the chassis 5 are integrally assembled without being assembled by a user, and the user only needs to connect a hydraulic hose according to actual requirements.

Claims

1. The ultrahigh-pressure oil injector is characterized by comprising a bottom frame (5), wherein a pump body assembly (1) and a pressure oil pot assembly (4) which are of an integral structure are arranged on the bottom frame (5), an oil passage is arranged in the pump body assembly (1), and an oil suction port, a pressurizing port, a pressure relief port and an oil outlet are arranged on the oil passage; the pressure oil can component (4) is detachably connected with the oil suction port of the pump body component (1); the pressing opening is provided with a pressing device; the pressure port is connected with a pressure gauge (2); the pressure relief port is connected with a pressure relief valve component (3).

2. The ultrahigh-pressure lubricator according to claim 1, wherein the pump body assembly (1) comprises a pump body (19), and the oil passage is arranged inside the pump body (19); an oil suction port one-way valve (11) (1) is arranged at the oil suction port; the pressurizing opening is provided with a containing cavity, a plunger body (112) is arranged in the containing cavity, the plunger body (112) is fixed on the pump body (19) through a plunger body combining cap (113), a cavity is arranged in the middle of the plunger body (112), and the cavity is communicated with an oil passage and the outside; the pressing device comprises a connecting rod (15) and a pressure arm (11); the connecting rod (15) is fixedly connected with the pump body (19), and the front end of the pressure arm (11) is connected with the connecting rod (15) through a pin shaft (12); the middle part of the pressure arm (11) is connected with one end of a plunger (14); the other end of the plunger (14) is arranged in the cavity and sealed through a third sealing element (114), and the pressure arm (11) drives the plunger (14) to reciprocate along the direction of the cavity.

3. The ultrahigh-pressure lubricator as claimed in claim 2, wherein the rear end of the pressure arm (11) is connected with an elongated pressing handle (6).

4. The ultrahigh-pressure oil injector as claimed in claim 1, characterized in that said oil outlet is provided with an oil outlet check valve (110), and the tail end of the oil outlet is connected with a conversion joint (18) for converting a high-pressure hose.

5. The ultrahigh-pressure oil injector as claimed in claim 1, characterized in that the pressure port is provided with a pressure gauge (17), and the pressure gauge (2) is connected to the pressure gauge (17).

6. The ultrahigh-pressure oil injector as claimed in claim 1, characterized in that the pressure oil pot assembly (4) comprises an oil pot cover (41), an oil pot body (43) and a pull handle rod (42), wherein the oil pot body (43) is of a hollow structure, and the front end of the oil pot body (43) is connected with the oil pot cover (41); the front end of the handle rod (42) is arranged outside the oil can cover (41), the rear end of the handle rod is connected with the piston (45), and the piston (45) is arranged inside the oil can body (43) and sealed with the inner wall of the oil can body (43) through a second sealing element (46); a return pressure spring (44) is arranged in the oil pot body (43), one end of the return pressure spring is propped against the oil pot cover (41), and the other end of the return pressure spring is propped against the piston (45); the rear end of the oil pot body (43) is contracted to form an oil supply port.

7. The ultrahigh-pressure lubricator as claimed in claim 6, wherein the oil supply port is provided with a pot check valve (48), the oil supply port is connected with a pot adapter (49), and the oil supply port is connected with the oil suction port through the pot adapter (49).

8. The ultrahigh-pressure oil injector as claimed in claim 1, wherein a pressure relief oil path is arranged in the pump body assembly (1), the pressure relief oil path is communicated with a pressure relief port and the outside, and the pressure relief port is of a conical structure; the pressure relief valve component (3) comprises a pressure relief knob (31), a pressure relief valve rod (32), a pressure relief valve cover (33), a first sealing piece (34) and a steel ball (35), and the steel ball (35) is arranged at the pressure relief opening and seals the pressure relief opening; pressure relief valve gap (33) and pump body subassembly (1) fixed connection, pressure release knob (31) are connected pressure release valve rod (32) and are terminal, and pressure release valve rod (32) and pressure relief valve gap (33) screw-thread fit are sealed through pressure release sealing member (34), and pressure release valve rod (32) front end stretches into inside and support steel ball (35) of pressure relief valve gap (33).