CN220791421U - Radial plunger pump for switch machine - Google Patents
Radial plunger pump for switch machine Download PDFInfo
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- CN220791421U CN220791421U CN202322397363.0U CN202322397363U CN220791421U CN 220791421 U CN220791421 U CN 220791421U CN 202322397363 U CN202322397363 U CN 202322397363U CN 220791421 U CN220791421 U CN 220791421U
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- pump
- plunger
- cylinder body
- valve plate
- support bearing
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- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 19
- 239000000463 material Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model discloses a radial plunger pump for a point switch, which comprises a pump body, wherein one side of the pump body is hermetically connected with an oil tank, an end cover connected to the other side of the oil tank, and an overflow valve and a one-way valve which are arranged on the pump body, and the radial plunger pump is characterized in that: a cylinder body is arranged in the pump body through a first support bearing and a second support bearing, a plurality of groups of plunger assemblies are arranged on the outer wall of the cylinder body along the circumferential direction, each plunger assembly comprises a plunger and a tower spring sleeved on the plunger, the outer end of each plunger is abutted against the inner ring of the first support bearing, and an oil way is arranged on the cylinder body corresponding to each group of plunger assemblies; the pump is characterized in that a valve plate is arranged at the inner end part of the cylinder body in the pump body, two arc-shaped oil ways are symmetrically arranged on the valve plate, and the center of each arc-shaped oil way is overlapped with the center of an oil port of the oil way arranged on the cylinder body.
Description
Technical Field
The utility model belongs to the technical field of special equipment for a switch machine, and particularly relates to a radial plunger pump for the switch machine.
Background
The switch machine is an essential device for railway switch switching, and is an important device for ensuring railway driving efficiency and safety. With the development of large acceleration of railways in China, the electrohydraulic switch machine has stable and reliable work, large output force and easy realization of automatic locking, and almost plays a monopoly role. The transmission mode of the electrohydraulic transmission machine adopts a pump control cylinder mode;
the basic structure of the existing plunger pump for the switch machine comprises a pump body, wherein one side of the pump body is connected with an oil tank in a sealing manner, an end cover connected to the other side of the oil tank, an overflow valve and a one-way valve which are arranged on the pump body, and a flow distribution shaft and a cylinder body which are in rotary fit. Problems with prior art arrangements; because of the difference of the cylinder body, the flow distribution shaft and the plunger materials, the difference of the expansion coefficients of heat expansion and cold contraction at high and low temperatures is larger, the fit clearance of the cylinder body is restricted to be not smaller than certain data, and the locking phenomenon can be generated at low temperatures. On the contrary, too large gap can cause too large internal leakage, so that the requirements of pressure and flow are difficult to realize, and the gap of metal is also increased at high temperature, so that the quality of products is difficult to ensure.
Therefore, the utility model relates to a radial plunger pump for a point switch, which can prolong the service life.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides a radial plunger pump for a point switch, which can prolong the service life.
The utility model is realized in this way, a radial plunger pump for a switch machine, comprising a pump body, one side of the pump body is connected with an oil tank in a sealing way, an end cover connected to the other side of the oil tank, and an overflow valve and a one-way valve which are arranged on the pump body, and the radial plunger pump is characterized in that: a cylinder body is arranged in the pump body through a first support bearing and a second support bearing, a plurality of groups of plunger assemblies are arranged on the outer wall of the cylinder body along the circumferential direction, each plunger assembly comprises a plunger and a tower spring sleeved on the plunger, the outer end of each plunger is abutted against the inner ring of the first support bearing, and an oil way is arranged on the cylinder body corresponding to each group of plunger assemblies;
the pump is characterized in that a valve plate is arranged at the inner end part of the cylinder body in the pump body, two arc-shaped oil ways are symmetrically arranged on the valve plate, and the center of each arc-shaped oil way is overlapped with the center of an oil port of the oil way arranged on the cylinder body.
Preferably, a pre-tightening spring is arranged between the end face of the valve plate in the pump body and the bottom face of the cylinder body installation cavity, and the pre-tightening spring enables the valve plate to be always in abutting connection with the inner end face of the cylinder body.
Preferably, a sealing groove is arranged between the two arc-shaped oil ways on the valve plate along the radial direction, and a sealing strip is inserted between the sealing grooves.
Preferably, the outer circumference of the port plate is provided with a groove, and a sealing member is installed in the groove.
Preferably, the cylinder body and the plunger are made of the same steel.
Preferably, the first support bearing and the second support bearing are deep groove ball bearings.
The utility model has the advantages and technical effects that: the utility model changes the rotation matching of the existing flow distribution shaft and the cylinder body into the matching structure of the flow distribution plate and the end face of the cylinder body, and reduces the internal leakage of the matching clearance after improvement; the valve plate structure is adopted, the manufacturability is good, and the structure is simple. The size of the pump body can be reduced, the volume of the whole pump body is further reduced, the working efficiency of the oil pump is improved, and the applicable environment of the pump is enlarged; the axial pump and the radial pump have the advantages of improving the working efficiency and prolonging the service life.
The utility model also adopts the same steel material as the material of the prior cylinder body and plunger through the optimization of the material, so that the change of the material is small at high and low temperatures, the leakage of the valve plate is small, the friction and the pressure are reduced, and the working efficiency of the pump is further improved.
The utility model improves the qualification rate, and improves the pressure, the efficiency and the flow.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic view of the port plate structure.
In the figure, 1, a pump body; 2. an oil tank; 3. an end cap; 4. an overflow valve; 5. a one-way valve; 6. a first support bearing; 7. a second support bearing; 8. a cylinder; 8-1, an oil way; 9. a plunger assembly; 9-1, a plunger; 9-2, a tower spring; 10. a port plate; 10-1, an arc oil way; 10-2, sealing the groove; 10-3, sealing strips; 10-4, grooves; 10-5, a sealing member; 11. and pre-tightening the stacking spring.
Detailed Description
The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1 to 3, a radial plunger pump for a switch machine comprises a pump body 1, wherein one side of the pump body is hermetically connected with an oil tank 2, an end cover 3 connected to the other side of the oil tank, an overflow valve 4 and a one-way valve 5 which are arranged on the pump body, a cylinder body 8 is arranged in the pump body through a first support bearing 6 and a second support bearing 7, a plurality of groups of plunger assemblies 9 are arranged on the outer wall of the cylinder body along the circumferential direction, each plunger assembly comprises a plunger 9-1 and a tower spring 9-2 sleeved on the plunger, the outer end of the plunger is abutted to a first support bearing inner ring, and an oil way 8-1 is arranged on the cylinder body corresponding to each group of plunger assemblies.
The utility model changes the traditional plunger pump flow distribution shaft and cylinder rotation matching into a flow distribution plate and cylinder end face matching structure, namely, the traditional axial pump and radial pump are combined in a correction way, the matching clearance is reduced, the control is easy, and the internal leakage is reduced; the adoption of the valve plate structure can reduce the size of the pump body, further reduce the volume of the whole pump body and enlarge the applicable environment of the pump.
Preferably, a pre-tightening spring 11 is arranged between the end face of the valve plate in the pump body and the bottom face of the cylinder body installation cavity, and the pre-tightening spring enables the valve plate to be always abutted against the inner end face of the cylinder body, so that internal leakage is prevented, and efficiency is improved.
Preferably, a sealing groove 10-2 is arranged between two arc oil ways on the valve plate along the radial direction, and a sealing strip 10-3 is inserted between the sealing grooves to prevent internal leakage and improve efficiency.
Preferably, the outer circumference of the valve plate is provided with a groove 10-4, and a sealing component 10-5 is arranged in the groove to ensure the sealing between the valve plate and the pump body and prevent internal leakage.
Preferably, the cylinder body and the plunger are made of the same steel, and the material performance of the cylinder body and the plunger is consistent in change under high and low temperature environments through optimization of materials, the change is small, the leakage of the valve plate is small, friction and pressure are reduced, and therefore the working efficiency of the pump is improved.
Preferably, the first support bearing and the second support bearing are deep groove ball bearings, and the cylinder body is supported by the bearings at two sides, so that the rotation resistance is reduced.
The radial plunger pump mainly detects technical parameters:
1. work scale displacement: 2.7ml/r (+ -5%);
2. rated pressure: 10MPa;
3. highest pressure: 16MPa, can normally run for more than 1min, and 30 (25) MPa pressure maintaining test;
4. volumetric efficiency: more than or equal to 92 percent (measured at the pressure of 10MPa and the temperature of 20+/-4 ℃);
5. noise: less than or equal to 70db;
6. temperature characteristics: when the ambient temperature and the inlet oil temperature are within the range of-40 ℃ to 70 ℃, the pump can work normally;
7. rated rotational speed: 860r/min;
8. working medium: no. 10 aviation hydraulic oil
9. Life span: 100 ten thousand times (1 time under rated load for 6s, then reverse operation, 6-10s each time interval); (durability: 1000 hours in full load test, 10 hours in overload test, 10 tens of thousands of impact tests), after which the volumetric efficiency should not be lower than the prescribed value by 3 percentage points; the parts must not be abnormally worn or otherwise damaged.
Other performance requirements meet the corresponding regulations in JB/T7043-2006 hydraulic axial plunger pump.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (6)
1. The utility model provides a radial plunger pump for switch machine, includes the pump body, one side sealing connection of the pump body has the oil tank, connects the end cover at the oil tank opposite side to and install overflow valve and the check valve on the pump body, its characterized in that: a cylinder body is arranged in the pump body through a first support bearing and a second support bearing, a plurality of groups of plunger assemblies are arranged on the outer wall of the cylinder body along the circumferential direction, each plunger assembly comprises a plunger and a tower spring sleeved on the plunger, the outer end of each plunger is abutted against the inner ring of the first support bearing, and an oil way is arranged on the cylinder body corresponding to each group of plunger assemblies;
the pump is characterized in that a valve plate is arranged at the inner end part of the cylinder body in the pump body, two arc-shaped oil ways are symmetrically arranged on the valve plate, and the center of each arc-shaped oil way is overlapped with the center of an oil port of the oil way arranged on the cylinder body.
2. The radial piston pump for a switch machine according to claim 1, wherein: a pre-tightening spring is arranged between the end face of the valve plate in the pump body and the bottom face of the cylinder body installation cavity, so that the valve plate and the inner end face of the cylinder body are always kept in abutting connection.
3. The radial piston pump for a switch machine according to claim 1, wherein: a sealing groove is arranged between the two arc-shaped oil ways on the valve plate along the radial direction, and sealing strips are inserted between the sealing grooves.
4. The radial piston pump for a switch machine according to claim 1, wherein: the outer circumference of the valve plate is provided with a groove, and a sealing component is arranged in the groove.
5. The radial piston pump for a switch machine according to claim 1, wherein: the cylinder body and the plunger are made of the same steel.
6. The radial piston pump for a switch machine according to claim 1, wherein: the first support bearing and the second support bearing are deep groove ball bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322397363.0U CN220791421U (en) | 2023-09-04 | 2023-09-04 | Radial plunger pump for switch machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322397363.0U CN220791421U (en) | 2023-09-04 | 2023-09-04 | Radial plunger pump for switch machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220791421U true CN220791421U (en) | 2024-04-16 |
Family
ID=90637429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322397363.0U Active CN220791421U (en) | 2023-09-04 | 2023-09-04 | Radial plunger pump for switch machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220791421U (en) |
-
2023
- 2023-09-04 CN CN202322397363.0U patent/CN220791421U/en active Active
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