CN218934870U - Hydraulic system of connecting rod expanding machine - Google Patents
Hydraulic system of connecting rod expanding machine Download PDFInfo
- Publication number
- CN218934870U CN218934870U CN202222873690.4U CN202222873690U CN218934870U CN 218934870 U CN218934870 U CN 218934870U CN 202222873690 U CN202222873690 U CN 202222873690U CN 218934870 U CN218934870 U CN 218934870U
- Authority
- CN
- China
- Prior art keywords
- rod
- oil
- cartridge valve
- connecting rod
- hydraulic system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model relates to the technical field of connecting rod expanding and breaking machines, and particularly provides a connecting rod expanding and breaking machine hydraulic system, which is provided with a double-rod hydraulic cylinder and a logic cartridge valve to improve the response speed and the expanding and breaking strength of the hydraulic system. The two cavities of the double-rod hydraulic cylinder are rod cavities, and the volume of the rod cavities is reduced due to the existence of the piston rod, so that the back pressure is reduced during oil return, and the piston rod can be quickly and forcefully stretched; the logic cartridge valve is adopted, so that the flow capacity is high, the pressure loss is low, and the hydraulic system is suitable for a high-flow hydraulic system; through the cooperation with double-rod pneumatic cylinder and logic cartridge valve, can promote the flexible speed and the expansion dynamics of double-rod pneumatic cylinder's piston rod by a wide margin, effectively ensure connecting rod expansion machine hydraulic system's response speed and the expansion dynamics, effectively ensure the expansion quality of connecting rod.
Description
Technical Field
The utility model relates to the technical field of connecting rod expanding and breaking machines, in particular to a hydraulic system of a connecting rod expanding and breaking machine.
Background
The connecting rod expansion technology has become an important mark of the state of the art of engine connecting rod manufacture. The connecting rod obtained by the expansion cutting processing method has the advantages that the joint surface of the rod and the cover can be completely meshed, machining is not needed, and the connecting rod has larger contact area and higher bearing strength. The connecting rod expanding machine tool is the key core equipment in the novel connecting rod expanding machining technology, and brittle fracture of a connecting rod cover and a connecting rod is to be completed on the machine tool, so that chipless fracture splitting and subsequent accurate meshing of the connecting rod cover and the connecting rod are realized, and a traditional machining method of a connecting rod body and a connecting cover joint surface is replaced. It can be seen that the link expansion technology has achieved a wide acceptance in the industry.
When the connecting rod of the automobile is broken, the connecting rod breaking machine can rapidly and forcefully break the rod body and the rod cover of the connecting rod, and is one of important conditions for determining the quality of the subsequent connecting rod. However, the hydraulic system of the existing connecting rod expanding machine has defects in response speed and output expanding strength, so that the expanding quality of the connecting rod is affected.
Disclosure of Invention
The utility model aims to solve the problems of lag in response speed and insufficient expansion strength of a connecting rod expansion machine hydraulic system in the prior art, and provides a connecting rod expansion machine hydraulic system which can quickly respond and has large expansion strength.
The utility model relates to a connecting rod expanding machine hydraulic system, which comprises an oil tank, a hydraulic pump communicated with the oil tank through a pipeline, a double-rod hydraulic cylinder, a first logic cartridge valve, a second logic cartridge valve, a third logic cartridge valve and a fourth logic cartridge valve, wherein the hydraulic pump is connected with the oil tank through a pipeline; one of the oil ports of the first logic cartridge valve, one of the oil ports of the second logic cartridge valve and the hydraulic pump are connected in series through a pipeline, one of the oil ports of the third logic cartridge valve and one of the oil ports of the fourth logic cartridge valve are connected in series through a pipeline, and the free end of the pipeline is communicated with an oil tank; the other oil port of the first logic cartridge valve is communicated with the other oil port of the third logic cartridge valve through a pipeline, and the pipeline is also communicated with one rod cavity of the double-rod hydraulic cylinder; the other oil port of the second logic cartridge valve is communicated with the other oil port of the fourth logic cartridge valve through a pipeline, and the pipeline is also communicated with the other rod cavity of the double-rod hydraulic cylinder; the free end of any piston rod of the double-rod hydraulic cylinder is connected with a wedge block which stretches and contracts along with the piston rod.
According to the hydraulic system of the connecting rod expanding machine, when the hydraulic system works, the piston rod of the double-rod hydraulic cylinder with the wedge block is upward; when the double-rod hydraulic cylinder is reset, two oil ports of the first logic cartridge valve are opened, an oil port connected with the first logic cartridge valve by the second logic cartridge valve is opened, the other oil port is closed, two oil ports of the third logic cartridge valve are closed, two oil ports of the fourth logic cartridge valve are opened, a hydraulic pump operates, oil is pumped from an oil tank and pumped into a pipeline, at the moment, hydraulic oil is pumped into a rod cavity below the double-rod hydraulic cylinder through the hydraulic pump, the second logic cartridge valve and the first logic cartridge valve, a piston rod in the rod cavity drives the double-rod hydraulic cylinder to retract into the rod cavity, meanwhile, oil in the rod cavity above the double-rod hydraulic cylinder returns to the oil tank after flowing through the fourth logic cartridge valve through the pipeline, and the piston rod in the rod cavity drives a wedge block on the piston rod to extend upwards to reset; when the connecting rod is required to be broken, the two oil ports of the first logic cartridge valve are closed, the second logic cartridge valve is opened, the two oil ports of the third logic cartridge valve are opened, the oil port connected with the fourth logic cartridge valve and the fourth logic cartridge valve is opened, the other oil port is closed, the hydraulic pump operates, pumps oil from the oil tank and pumps the oil into the pipeline, at the moment, hydraulic oil is pumped into the rod cavity above the double-rod hydraulic cylinder through the hydraulic pump and the second logic cartridge valve, the piston rod in the rod cavity is driven to retract into the rod cavity quickly, the wedge block can be broken quickly, and meanwhile, the oil in the rod cavity below the double-rod hydraulic cylinder flows through the third logic cartridge valve and the fourth logic cartridge valve through the pipeline and returns to the oil tank. Because the two cavities of the double-rod hydraulic cylinder are rod cavities, the volume of the rod cavities is reduced and the oil quantity is reduced due to the existence of the piston rod, so that the back pressure is reduced during oil return, and the piston rod can be quickly and forcefully stretched; the logic cartridge valve is adopted, so that the flow capacity is high, the pressure loss is low, and the hydraulic system is suitable for a high-flow hydraulic system; through the cooperation with double-rod pneumatic cylinder and logic cartridge valve, can promote the flexible speed and the expansion dynamics of double-rod pneumatic cylinder's piston rod by a wide margin, effectively ensure connecting rod expansion machine hydraulic system's response speed and the expansion dynamics, effectively ensure the expansion quality of connecting rod.
Further, the hydraulic pump is a constant pressure variable pump. When the outlet pressure of the hydraulic pump is equal to the working pressure of the system, the output flow of the pump is 0, the system has no energy loss at the moment, when the outlet pressure is reduced, the output flow of the pump supplements the pressure of the system until the pressure of the system reaches the working pressure, the flow returns to zero again, the whole hydraulic system has no energy loss, the heating phenomenon of the hydraulic system is avoided, and therefore, the volume of the oil tank can be reduced, the occupied space is small, and the whole hydraulic system is more compact.
Further, an air-cooled radiator is provided between the hydraulic pump and the oil tank. The heat can be absorbed and emitted, and the temperature rise of the oil tank environment is further avoided.
Further, an oil suction filter is arranged on an oil inlet pipeline which is communicated with the oil tank by the hydraulic pump. And the hydraulic oil in the oil tank is filtered, so that impurities and pollutants in the hydraulic system are effectively controlled.
Further, the connecting rod expanding machine hydraulic system further comprises a bag-type energy accumulator, and an energy storage safety valve of the bag-type energy accumulator is connected with the hydraulic pump in series. The hydraulic oil firstly passes through the bag-type energy accumulator and then passes through the subsequent first logic cartridge valve and the second logic cartridge valve, and through the action of the bag-type energy accumulator, the hydraulic oil can be stored or released to achieve the effects of energy storage, pressure stabilization, pulse elimination, impact absorption, capacity compensation and leakage compensation, so that the safe, reliable and stable operation of the hydraulic system is ensured.
Further, a shock-resistant pressure gauge is connected in parallel on a pipeline between the hydraulic pump and the bag-type energy accumulator. Detecting the oil pressure of a pipeline through a vibration-resistant pressure gauge, so as to ensure that a hydraulic system works in a safe and effective pressure value; the shock-resistant pressure gauge is adopted, and has good shock resistance, so that damage to the gauge caused by strong flow of hydraulic oil and environmental shock can be overcome, and the accuracy of reading is ensured.
Further, the connecting rod expanding machine hydraulic system further comprises an overflow valve which is connected with the hydraulic pump in parallel through a pipeline. By arranging the overflow valve, the functions of constant pressure overflow, pressure stabilization, system unloading and safety protection are achieved, and the safe operation of the hydraulic system is ensured.
Further, a proximity switch is arranged on one side of the double-rod hydraulic cylinder. Whether the piston rod of the double-rod hydraulic cylinder is pulled down and reset in place is detected, and the expansion quality of the connecting rod is ensured.
Further, a liquid level thermometer is arranged on the side wall of the oil tank. The oil temperature and the oil quantity of the hydraulic oil in the oil tank are measured, and the normal operation of the hydraulic system is ensured.
Further, an air filter is arranged at the air vent hole on the oil tank. Is used for filtering air and avoiding impurities from entering the oil tank.
Further, a return oil filter is provided on a return oil line communicating with the tank. The device is used for fine filtering of return oil of a hydraulic system, and filtering out metal particles generated by element abrasion in the hydraulic system, rubber impurities abraded by sealing elements and other pollutants, so that oil flowing back to an oil tank is kept clean.
Compared with the prior art, the utility model has the following beneficial technical effects: by matching the double-rod hydraulic cylinder with the logic cartridge valve, the expansion speed and the breaking strength of a piston rod of the double-rod hydraulic cylinder can be greatly improved, the response speed and the breaking strength of a hydraulic system of the connecting rod breaking machine are effectively ensured, and the breaking quality of the connecting rod is effectively ensured; when the outlet pressure of the hydraulic pump is equal to the working pressure of the system, the output flow of the pump is 0, the system has no energy loss at the moment, when the outlet pressure is reduced, the output flow of the pump supplements the pressure of the system until the pressure of the system reaches the working pressure, the flow returns to zero again, the whole hydraulic system has no energy loss, the heating phenomenon of the hydraulic system is avoided, and therefore, the volume of the oil tank can be reduced, the occupied space is small, and the whole hydraulic system is more compact.
Drawings
Fig. 1 is a schematic diagram of a hydraulic system according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram of a hydraulic system according to an embodiment of the present utility model (the direction of the oil passage when the wedge is reset).
Fig. 3 is a schematic diagram of a hydraulic system according to an embodiment of the present utility model (the direction of the oil path when the connecting rod is broken).
1, an oil tank; 2. a hydraulic pump; 3. a double-rod hydraulic cylinder; 4. a first logic cartridge valve; 5. a second logic cartridge valve; 6. a third logic cartridge valve; 7. a fourth logic cartridge valve; 8. wedge blocks; 9. an oil absorption filter; 10. a return oil filter; 11. a liquid level thermometer; 12. an air cleaner; 13. an air-cooled radiator; 14. a bladder accumulator; 15. an overflow valve; 16. a shock resistant pressure gauge; 17. a proximity switch;
Detailed Description
For the purposes, technical solutions and advantages of the embodiments of the present application, the technical solutions of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, based on the described embodiments, which a person of ordinary skill in the art would obtain without inventive faculty, are within the scope of protection of the present application.
Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Example 1
The embodiment discloses a connecting rod expanding machine hydraulic system, which comprises an oil tank 1, a hydraulic pump 2 communicated with the oil tank 1 through a pipeline, a double-rod hydraulic cylinder 3, a first logic cartridge valve 4, a second logic cartridge valve 5, a third logic cartridge valve 6 and a fourth logic cartridge valve 7, as shown in fig. 1 to 3; one of the oil ports of the first logic cartridge valve 4, one of the oil ports of the second logic cartridge valve 5 and the hydraulic pump 2 are connected in series through pipelines, one of the oil ports of the third logic cartridge valve 6 and one of the oil ports of the fourth logic cartridge valve 7 are connected in series through pipelines, and the free end of the pipeline is communicated with the oil tank 1; the other oil port of the first logic cartridge valve 4 is communicated with the other oil port of the third logic cartridge valve 6 through a pipeline, and the pipeline is also communicated with one rod cavity of the double-rod hydraulic cylinder 3; the other oil port of the second logic cartridge valve 5 is communicated with the other oil port of the fourth logic cartridge valve 7 through a pipeline, and the pipeline is also communicated with the other rod cavity of the double-rod hydraulic cylinder 3; the free end of any piston rod of the double-rod hydraulic cylinder 3 is connected with a wedge block 8 which stretches and contracts along with the free end.
In the specific implementation process, the hydraulic pump 2 is a constant-pressure variable pump, and the constant-pressure variable pump is in the prior art and can be purchased in the market; the first logic cartridge valve 4, the second logic cartridge valve 5, the third logic cartridge valve 6 and the fourth logic cartridge valve 7 are two-way cartridge valves and are provided with two oil ports; an oil suction filter 9 is arranged on an oil inlet pipeline of the hydraulic pump 2 communicated with the oil tank 1; a return oil filter 10 is provided in a return line communicating with the tank 1; the double-rod hydraulic cylinder 3 is the prior art.
When the double-rod hydraulic cylinder works, the piston rod of the double-rod hydraulic cylinder 3 with the wedge block 9 faces upwards; when the double-rod hydraulic cylinder 3 is reset, two oil ports of the first logic cartridge valve 4 are opened, an oil port connected with the first logic cartridge valve 4 by the second logic cartridge valve 5 is opened, the other oil port is closed, two oil ports of the third logic cartridge valve 6 are closed, two oil ports of the fourth logic cartridge valve 7 are opened, as shown by an arrow of fig. 1, an oil path trend is shown by the oil, the hydraulic pump 2 operates, oil is pumped from the oil tank 1 and pumped into a pipeline, after being filtered by the oil suction filter 9, hydraulic oil is pumped into a rod cavity below the double-rod hydraulic cylinder 3 by the hydraulic pump 2, the second logic cartridge valve 5 and the first logic cartridge valve 4, a piston rod in the rod cavity is driven to retract into the rod cavity, meanwhile, the oil in the rod cavity above the double-rod hydraulic cylinder 3 flows through the fourth logic cartridge valve 7 by the pipeline, is filtered by the oil return filter 10 and returns to the oil tank 1, and the piston rod in the rod cavity drives a wedge block on the rod cavity to extend upwards to reset; when the connecting rod is required to be broken, the two oil ports of the first logic cartridge valve 4 are closed, the second logic cartridge valve 5 is opened, the two oil ports of the third logic cartridge valve 6 are opened, the oil port of the fourth logic cartridge valve 7 connected with the third logic cartridge valve 6 is opened, the other oil port is closed, an oil path trend shown by an arrow in fig. 2 is shown, the hydraulic pump 2 operates, oil is pumped from the oil tank 1 and pumped into a pipeline, after the hydraulic oil is filtered by the oil suction filter 9, the hydraulic oil is pumped into a rod cavity above the double-rod hydraulic cylinder 3 through the hydraulic pump 2 and the second logic cartridge valve 5, a piston rod in the rod cavity is driven to retract into the rod cavity quickly, the connecting rod can be broken quickly by the wedge block 8, and meanwhile, the oil in the rod cavity below the double-rod hydraulic cylinder 3 flows through the third logic cartridge valve 6 and the fourth logic cartridge valve 7 through a pipeline, and is filtered by the oil return filter 10, and returns to the oil tank 1. Because the two cavities of the double-rod hydraulic cylinder 3 are rod cavities, the volume of the rod cavities is reduced due to the existence of the piston rod, and the oil quantity is reduced, so that the back pressure is reduced during oil return, and the piston rod can be quickly and forcefully stretched; the logic cartridge valve is adopted, so that the flow capacity is high, the pressure loss is low, and the hydraulic system is suitable for a high-flow hydraulic system; through the cooperation with the double-rod hydraulic cylinder 3 and the logic cartridge valve, the expansion speed and the expansion strength of the piston rod of the double-rod hydraulic cylinder 3 can be greatly improved, the response speed and the expansion strength of a connecting rod expansion machine hydraulic system are effectively ensured, and the expansion quality of the connecting rod is effectively ensured.
Example two
In the present embodiment, an air-cooled radiator 13 is provided between the hydraulic pump 2 and the oil tank 1; a liquid level thermometer 11 is arranged on the side wall of the oil tank 1; an air cleaner 12 is provided at an air vent hole in the oil tank 1.
When the constant-pressure variable pump works, the air cooling radiator 13 radiates heat for discharging oil of the constant-pressure variable pump, so that the oil temperature is prevented from being too high; the temperature inside the oil tank 1 and the hydraulic oil level are measured through a liquid level thermometer 11 so as to ensure that the hydraulic system operates normally; in addition, impurities in the air are filtered by the air cleaner 12.
Example III
On the basis of the second embodiment, in this embodiment, the hydraulic system of the connecting rod expanding machine further includes a bag accumulator 14 and an overflow valve 15.
In the specific implementation process, an energy storage safety valve of the bag-type energy accumulator 14 is connected with the hydraulic pump 2 in series; the relief valve 15 is connected in parallel with the hydraulic pump 2 via a pipeline.
In operation, the bladder accumulator 14 may store or release hydraulic pressure to achieve energy storage, pressure stabilization, pulse elimination, shock absorption, capacity compensation, and leakage compensation; and the overflow valve 15 can play roles of constant-pressure overflow, pressure stabilization, system unloading and safety protection.
Example IV
On the basis of the third embodiment, in this embodiment, the hydraulic system of the connecting rod expanding machine further includes a shock-resistant pressure gauge 16 and a proximity switch 17.
In the concrete implementation process, a shock-resistant pressure gauge 16 is connected in parallel on a pipeline between the hydraulic pump 2 and the bag-type energy accumulator 14, and a pressure gauge switch is also arranged on the shock-resistant pressure gauge 16; a proximity switch 17 is provided on the side of the double-rod hydraulic cylinder 3.
During operation, the shock-resistant pressure gauge 16 detects the oil pressure of the pipeline, so that the hydraulic system is ensured to work in a safe and effective pressure value; the proximity switch 17 detects whether the piston rod of the double-rod hydraulic cylinder 3 is pulled down and reset in place.
It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. The hydraulic system of the connecting rod expanding machine comprises an oil tank (1) and a hydraulic pump (2) which is communicated with the oil tank (1) through a pipeline, and is characterized by further comprising a double-rod hydraulic cylinder (3), a first logic cartridge valve (4), a second logic cartridge valve (5), a third logic cartridge valve (6) and a fourth logic cartridge valve (7); one of the oil ports of the first logic cartridge valve (4), one of the oil ports of the second logic cartridge valve (5) and the hydraulic pump (2) are connected in series through a pipeline, one of the oil ports of the third logic cartridge valve (6) is connected in series with one of the oil ports of the fourth logic cartridge valve (7) through a pipeline, and the free end of the pipeline is communicated with the oil tank (1); the other oil port of the first logic cartridge valve (4) is communicated with the other oil port of the third logic cartridge valve (6) through a pipeline, and the pipeline is also communicated with one rod cavity of the double-rod hydraulic cylinder (3); the other oil port of the second logic cartridge valve (5) is communicated with the other oil port of the fourth logic cartridge valve (7) through a pipeline, and the pipeline is also communicated with the other rod cavity of the double-rod hydraulic cylinder (3); the free end of any piston rod of the double-rod hydraulic cylinder (3) is connected with a wedge block (8) which stretches and contracts along with the free end.
2. The connecting rod bulge machine hydraulic system according to claim 1, characterized in that an air-cooled radiator (13) is arranged between the hydraulic pump (2) and the oil tank (1).
3. The connecting rod bulge machine hydraulic system according to claim 2, characterized in that an oil suction filter (9) is arranged on an oil inlet pipeline of the hydraulic pump (2) communicated with the oil tank (1).
4. A connecting rod expander hydraulic system as claimed in any one of claims 1-3, and further comprising a bag accumulator (14), the energy storage safety valve of the bag accumulator (14) being connected in series with the hydraulic pump (2).
5. The hydraulic system of the connecting rod expansion machine according to claim 4, characterized in that a shock-resistant pressure gauge (16) is connected in parallel on a pipeline between the hydraulic pump (2) and the bag accumulator (14).
6. The hydraulic system of the connecting rod expander according to claim 5, further comprising an overflow valve (15) connected in parallel with the hydraulic pump (2) via a pipeline.
7. The hydraulic system of a connecting rod expansion machine according to any of the claims 1-3 or 5 or 6, characterized in that a proximity switch (17) is arranged on one side of the double rod hydraulic cylinder (3).
8. The hydraulic system of the connecting rod expansion machine according to claim 7, characterized in that a liquid level thermometer (11) is arranged on the side wall of the oil tank (1).
9. The hydraulic system of the connecting rod bulge machine according to claim 8, characterized in that an air filter (12) is arranged at the vent hole on the oil tank (1).
10. The connecting rod bulge machine hydraulic system according to claim 9, characterized in that a return oil filter (10) is arranged on a return oil line which communicates with the oil tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222873690.4U CN218934870U (en) | 2022-10-28 | 2022-10-28 | Hydraulic system of connecting rod expanding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222873690.4U CN218934870U (en) | 2022-10-28 | 2022-10-28 | Hydraulic system of connecting rod expanding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218934870U true CN218934870U (en) | 2023-04-28 |
Family
ID=86084281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222873690.4U Active CN218934870U (en) | 2022-10-28 | 2022-10-28 | Hydraulic system of connecting rod expanding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218934870U (en) |
-
2022
- 2022-10-28 CN CN202222873690.4U patent/CN218934870U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104776086A (en) | Remanufactured oil cylinder performance detection platform | |
| CN216111494U (en) | High-pressure roller mill hydraulic control system and high-pressure roller mill | |
| CN105114374A (en) | Hydraulic system | |
| CN204591872U (en) | One manufactures oil cylinder performance detecting platform again | |
| CN218934870U (en) | Hydraulic system of connecting rod expanding machine | |
| CN108953248A (en) | Hydraulic test system for axial force load | |
| CN201524796U (en) | Tundish nozzle quick-replacement hydraulic control system of continuous casting machine | |
| CN103321975B (en) | A kind of low-high pressure soft start hydraulic oil source system | |
| CN105757016A (en) | Hydraulic control system of supercharging device | |
| CN110259743B (en) | Hydraulic cylinder independent control system of rock triaxial creep testing machine | |
| CN108006013B (en) | Online detection system and detection method for hydraulic hoist | |
| CN105443513B (en) | A kind of Working machine | |
| CN209129958U (en) | It is a kind of for driving the hydraulic system of super high-pressure hydrogen compressor | |
| CN108930675A (en) | Hydraulic loading system oil inlet protective device | |
| CN208153428U (en) | A kind of hydraulic control system of isostatic pressing machine | |
| CN201632936U (en) | Micro-porous nozzle internal runner processing device utilizing abrasive suspension jet | |
| CN208537160U (en) | A kind of life of valve experimental provision | |
| CN109030195A (en) | Test device for different-thickness part fatigue test | |
| CN109115488A (en) | Gear fatigue experiment loading system fluid pressure line protective device | |
| CN210705967U (en) | Oil circuit control system of injection blow molding machine mould clamping mechanism | |
| CN210440089U (en) | Device for eliminating steam leakage at shaft end of turning plate type medium-pressure main steam valve of steam turbine | |
| CN107044466A (en) | Arm bender special efficient energy-saving electric-hydraulic ratio system | |
| CN203463278U (en) | Combination valve | |
| CN220007034U (en) | Central water outlet unit | |
| CN206072722U (en) | A kind of hydrostatic bearing lubrication station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |