CN209927375U - Test bed for testing engine crankshaft tightness - Google Patents
Test bed for testing engine crankshaft tightness Download PDFInfo
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- CN209927375U CN209927375U CN201920859079.1U CN201920859079U CN209927375U CN 209927375 U CN209927375 U CN 209927375U CN 201920859079 U CN201920859079 U CN 201920859079U CN 209927375 U CN209927375 U CN 209927375U
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- crankshaft
- oil
- supporting seat
- tightness
- journal
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Abstract
The utility model discloses a test bench for testing engine crankshaft tightness, which comprises a supporting seat, wherein an oil pump assembly is arranged on the side surface of the supporting seat, a plurality of crankshaft supports are arranged on the upper part of the supporting seat, anti-rotation assemblies for preventing the crankshaft from rotating are respectively arranged at the two ends of the supporting seat, and an oil receiving disc is arranged on the upper plane of the supporting seat below the crankshaft; the first main journal of the crankshaft is provided with a sealing clamp for oil transportation, one end of the sealing clamp for oil transportation is provided with a communicating pipe, and the other journal oil ducts and the crank pin oil duct of the main journal are respectively provided with a journal oil duct sealing clamp. The test bench solves the problem of oil leakage of the oil seal caused by poor oil seal sealing and no requirement on assembly of a large-scale engine, thereby avoiding the problems of poor lubrication, sintering, abrasion, oil seal leakage and the like of a bearing bush and a crankshaft caused by oil leakage of the oil seal.
Description
Technical Field
The utility model relates to a bent axle test field, concretely relates to a test bench for testing engine crankshaft leakproofness.
Background
During the operation of the engine, the crankshaft in the engine is subjected to the combined action of gas force, reciprocating inertia force and moment which are periodically changed and the centrifugal force of a rotating mass, so that the crankshaft is subjected to large alternating stress action which is periodically changed, such as torsion, bending, compression, stretching and the like. Meanwhile, each shaft neck of the crankshaft rotates at high speed under high specific pressure, so that the shaft diameter and the bearing are strongly abraded, good lubricating conditions are ensured, and the working reliability, the service life and the manufacturing cost of the engine are directly influenced.
In order to ensure the reliable operation of the crankshaft bearings, the crankshaft must be provided with a reliable lubricant passage, typically by pressure lubrication, which delivers lubricant to the friction surfaces of the bearings. The method for supplying lubricating oil to the crankshaft oil duct has two types: one is branch oil supply, namely, lubricating oil is introduced from a main oil duct on a machine body through an upper bearing bush of a main bearing and then is sent to a connecting rod bearing through an internal oil duct of a crankshaft; the other is a centralized oil supply, which generally feeds lubricating oil from one end of the crankshaft through a bearing into the crankshaft cavity and then from oil holes in the main journal and crank pin to the friction surface.
The crankshaft is sealed for preventing the leakage of engine oil and the entry of external dust, which causes the operation failure; secondly, in order to prevent the oil leakage of the oil seals at the two ends of the crankshaft, the lubricating oil is leaked to the outside of the engine body along the front end and the rear end of the crankshaft, so that the lubricating effect of the crankshaft is influenced, and the problems of sintering, abrasion, leakage and the like are caused. Therefore, whether the sealing performance of the crankshaft is good or not is directly related to the engine stability and durability of the engine, and the crankshaft must be subjected to a sealing test before shipment, and an effective test device is not yet available.
Disclosure of Invention
In order to solve the problems, the utility model provides a test bench for testing the tightness of the crankshaft of the engine, which solves the problem of oil seal leakage caused by the fact that the oil seal of a large engine is not good and the assembly does not meet the requirements, thereby avoiding the problems of poor lubrication, the sintering, abrasion and oil seal leakage of a bearing bush and the crankshaft caused by the oil seal leakage, and simultaneously leading the outgoing quality of the crankshaft to be higher and the timeliness to be better; the engine has better working reliability, longer service life and lower manufacturing cost.
The utility model discloses a realize through following measure:
a test bed for testing the tightness of an engine crankshaft comprises a supporting seat, wherein an oil pump assembly for supplying oil to the crankshaft is arranged on the side face of the supporting seat, a plurality of crankshaft supports for supporting the crankshaft are mounted at the upper part of the supporting seat, anti-rotation assemblies for preventing the crankshaft from rotating are respectively arranged at two ends of the supporting seat, and an oil receiving disc is arranged below the crankshaft on the upper plane of the supporting seat;
the oil delivery sealing clamp for plugging the first main journal oil duct is mounted on a first main journal of the crankshaft, a communicating pipe for communicating the first main journal oil duct with the oil pump assembly is arranged at one end of the oil delivery sealing clamp, and journal oil duct sealing clamps for plugging all the oil ducts are respectively arranged at a journal oil duct part and a crank pin oil duct part outside the first main journal oil duct of the crankshaft.
Preferably, the top of the crankshaft support is provided with a V-shaped support, the V-shaped support is provided with a wear pad, and the bottom of the crankshaft support is provided with height-adjustable support legs.
Preferably, the oil transportation sealing clamp and the journal oil passage sealing clamp both comprise clamp bodies, wherein one end of each clamp body is provided with a plugging head, and the other end of each clamp body of the journal oil passage sealing clamp is movably provided with a plugging bolt.
Preferably, the oil transportation sealing clamp and the journal oil passage sealing clamp are both connected with the crankshaft oil passage in a sealing mode through polytetrafluoroethylene interfaces.
Preferably, the rotation-preventing assembly comprises a supporting part connected with the supporting seat, a limiting bolt is arranged on the supporting part, and the axis of the limiting bolt is coaxial with the central line of the journal at the end part of the crankshaft.
Preferably, the supporting part is a square pipe or a round pipe or square steel or flat steel.
Preferably, the supporting part is provided with a long slotted hole, and the supporting seat is connected with the supporting part through a bolt.
Preferably, a plurality of long slotted holes are formed in two sides of the supporting seat, and the crankshaft support is connected with the long slotted holes through bolts.
Preferably, the oil pump assembly is provided with a pressure gauge in a matching manner.
The utility model has the advantages that:
(1) the test bed is used for testing the sealing performance of an oil passage in the crankshaft, ensures the precision of crankshaft sealing installation in the crankshaft assembling process, avoids the problems of poor lubrication, the sintering, abrasion, oil seal leakage and the like of a bearing bush and the crankshaft caused by oil leakage of an oil seal, improves the assembling efficiency and ensures the reliability of an engine.
(2) Support the bent axle through supporting seat, bent axle support to connect the oil that overflows in the test process to the food tray, prevent changeing the relative position that the subassembly is used for fixed bent axle and bent axle seal test seat platform, prevent to cause the bent axle rotatory because of the oil pressure is too big in the experimentation.
(3) The pressure gauge monitors whether the oil pressure meets the test requirements or not, and the stability of the sealing test is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an overall structure diagram of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is a view showing a structure of a seal clip for oil transportation;
FIG. 4 is a view of a journal oil gallery seal clip;
FIG. 5 is a view of the crankshaft support structure;
in the figure: 1. the oil pump assembly comprises an oil pump assembly, 2 parts of a sealing clamp for oil transportation, 2 parts of 1 part of a sealing bolt, 2 parts of a clamp body, 2 parts of 3 parts of a communicating pipe, 3 parts of an oil receiving disc, 4 parts of a supporting seat, 5 parts of a journal oil passage sealing clamp, 6 parts of a crankshaft support, 6 parts of 1 part of a wear pad, 6 parts of 2 parts of a V-shaped supporting seat, 6 parts of 3 parts of a locking nut, 6 parts of 4 parts of a supporting leg, 7 parts of a supporting part, 8 parts of a limiting bolt, 9 parts of an oil pipe, 10 parts.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
For solving engine crankshaft not good because of the oil blanket is sealed, the assembly does not reach the oil blanket oil leak problem that the requirement produced, for avoiding because of the sintering of oil blanket oil leak lead to, axle bush and bent axle, wearing and tearing, oil blanket seepage scheduling problem, for the operational reliability and the life who improves the bent axle's the outgoing of factory quality and ageing nature and engine simultaneously, the utility model discloses a as shown the test bench that is used for testing bent axle leakproofness of figure 1-5, supporting seat 4 is square steel or angle steel welding component, and the upper portion platform both sides of supporting seat are provided with a plurality of slotted holes, and bent axle support 6 passes through the bolt and is connected with the slotted hole. The top of the crankshaft support 6 is provided with a V-shaped support 6-2, the V-shaped support is provided with a wear pad 6-1, the crankshaft 10 is placed on the upper portion of the wear pad 6-1, the bottom of the crankshaft support 6 is provided with two support legs 6-4, and a locking nut 6-3 is arranged between the support legs 6-4 and the V-shaped support 6-2 and used for fixing the height of the crankshaft support 6. A plurality of oil receiving discs 3 are arranged on the upper plane of the platform and used for receiving oil overflowing in the test process.
The oil transportation sealing clamp 2 is fixed on the first main journal, the oil transportation sealing clamp 2 comprises a clamp body 2-2, one end of the clamp body is provided with a communicating pipe 2-3, and the communicating pipe 2-3 is communicated with an oil pipe 9 and used for adding high-pressure lubricating oil into a crankshaft oil duct in a laboratory. High-pressure lubricating oil is provided by oil pump assembly 1, and oil pump assembly guarantees fuel feeding pressure's stability through voltage to whether be furnished with the manometer control oil pressure and reach the experimental requirement, guarantee seal test's stability. The other end of the clamp body is connected with a plugging bolt 2-1, the plugging bolt is in threaded connection with the clamp body, and crankshafts with different diameters can be plugged and communicated by rotating on the clamp body. One end of the journal oil duct sealing clamp 5 is provided with a plugging bolt which is the same as that in the oil transportation sealing clamp, and the other end of the journal oil duct sealing clamp is provided with a plugging head which can directly plug an oil duct opening. The main journal and the crank pin lubricating oil channel oil hole are sealed respectively according to the size, the tightness of the main journal and the crank pin lubricating oil channel oil hole and the oil pressure of engine oil in an oil channel during a sealing test are guaranteed, and the accuracy and the quality of the test are guaranteed. The oil transportation sealing clamp and the journal oil duct sealing clamp are both connected with the crankshaft oil duct in a sealing mode through polytetrafluoroethylene interfaces. The oil pump assembly 1 is used for providing lubricating oil required in the experimental process, the stability of the pressure of the lubricating oil in the experiment is ensured, the smooth running of the experiment is ensured, and the sealing quality of a crankshaft oil seal is ensured.
The both ends of supporting seat 4 are installed and are prevented changeing the subassembly, prevent changeing the subassembly and include supporting part 7, and the supporting part is square pipe or square steel or band steel. The supporting part is provided with a long slot hole, the supporting seat is connected with the supporting part through a limiting bolt 8, and the axis of the limiting bolt is coaxial with the central line of the end journal of the crankshaft. The crankshaft support is used for fixing the relative position of the crankshaft and the crankshaft support, crankshaft rotation caused by overlarge oil pressure in the experiment process is prevented, and unnecessary damage to personnel and parts is reduced. The fixed requirement of bent axle when guaranteeing the bent axle installation reduces the damage of instrument to bent axle diameter of axle and crank pin surface in the test process, guarantees bent axle test process stability, even workman's experimental experience is not enough, also can guarantee bent axle sealing test quality stability.
The tool has precise fixing function; the journal oil duct sealing clamp 5 and the oil delivery sealing clamp 2 ensure that the effective sealing of the oil duct hole can be ensured by rotating the plugging bolt 2-1 even if the shaft diameter and the crank pin diameter are changed. When the test bench works, a crankshaft support 6 is fixedly placed on a supporting seat, the height is adjusted, an oil receiving disc 3 is placed well, a crankshaft is placed on the crankshaft support, the crankshaft and a supporting portion 7 are fixed well by a limiting bolt 8 in an anti-rotation assembly, the position is adjusted, an oil conveying sealing clamp 2 is fixed on a first main journal through a plugging bolt 2-1, and a journal oil duct sealing clamp 5 is fixed on oil holes of other main journals and oil holes of a crank pin and is fastened by the plugging bolt 2-1.
The device specifically works as follows:
the supporting seat 4 is fixed well, the oil receiving disc 3 is placed on the supporting seat 4, the crankshaft support 6 is fixed on the supporting seat 4, the height of the crankshaft support is adjusted through the rotating support legs 6-4, coaxiality of the crankshaft and the anti-rotation assembly after the crankshaft falls is guaranteed, the crankshaft is fixed well through the rotating limiting bolt 7, rotation of the crankshaft due to overlarge pressure during a sealing test is prevented, the oil conveying sealing clamp 2 is fixed on a first main journal, the oil passage hole is sealed through the rotating plugging bolt 2-1, and the other end of the oil conveying sealing plug is connected with the oil pump assembly 1 through the oil pipe 9 as shown in figure 1. The journal oil duct sealing clamp 5 is sealed on a crank pin oil duct hole and a main journal oil duct hole, the oil duct hole is sealed by adjusting the plugging bolt 2-1, oil pressure is slowly added in the experimental process, whether the oil hole is well sealed is checked in the pressurizing process, it is ensured that the oil hole is well sealed, after no oil seeps out, the pressure is increased to the required pressure of the specified test, whether oil seeps out at the sealing part of the crankshaft is checked, if no oil seeps out, the test is qualified, and if oil leaks out, whether the assembly of the oil seal is qualified is checked again. The sealing test is carried out again after the reassembling, the friction and scratch minimization of the main journal and the crank pin of the crankshaft in the test process is carried out as far as possible in the test process, the relative position of the crankshaft in the seal test process is kept fixed by the design of the crankshaft rotation stop assembly, the secondary damage to the shaft diameter of the crankshaft caused by the change of the test position of the crankshaft is reduced to the maximum extent, and the test precision and the outgoing quality of the crankshaft are ensured.
The mounting position, the test precision, the mounting dimension and the test efficiency of the tool during the crankshaft sealing test are all guaranteed, and the damage of the crankshaft sealing test can be reduced to the minimum.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A test bed for testing the tightness of an engine crankshaft is characterized by comprising a supporting seat, wherein an oil pump assembly for supplying oil to the crankshaft is arranged on the side surface of the supporting seat, a plurality of crankshaft supports for supporting the crankshaft are mounted at the upper part of the supporting seat, anti-rotation assemblies for preventing the crankshaft from rotating are respectively arranged at two ends of the supporting seat, and an oil receiving disc is arranged below the crankshaft on the upper plane of the supporting seat;
the oil delivery sealing clamp for plugging the first main journal oil duct is mounted on a first main journal of the crankshaft, a communicating pipe for communicating the first main journal oil duct with the oil pump assembly is arranged at one end of the oil delivery sealing clamp, and journal oil duct sealing clamps for plugging all the oil ducts are respectively arranged at a journal oil duct part and a crank pin oil duct part outside the first main journal oil duct of the crankshaft.
2. The test bed for testing the tightness of the crankshaft of the engine according to claim 1, wherein a V-shaped support is arranged at the top of the crankshaft support, a wear pad is arranged on the V-shaped support, and a height-adjustable support leg is arranged at the bottom of the crankshaft support.
3. The test bed for testing the tightness of the engine crankshaft according to claim 1, wherein the oil transportation sealing clamp and the journal oil passage sealing clamp both comprise clamp bodies, a blocking head is arranged at one end of each clamp body, and a blocking bolt is movably mounted at the other end of each clamp body of the journal oil passage sealing clamp.
4. The test bed for testing the tightness of the crankshaft of the engine according to claim 3, wherein the oil transportation sealing clamp and the journal oil passage sealing clamp are connected with the crankshaft oil passage in a sealing mode through polytetrafluoroethylene interfaces.
5. The test bed for testing the tightness of the crankshaft of the engine according to claim 1, wherein the anti-rotation assembly comprises a support part connected with the support seat, a limit bolt is arranged on the support part, and the axis of the limit bolt is coaxial with the central line of the end journal of the crankshaft.
6. The test bed for testing the tightness of the engine crankshaft according to claim 5, wherein the supporting portion is a square pipe or a round pipe or square steel or flat steel.
7. The test bed for testing the tightness of the crankshaft of the engine according to claim 5, wherein the supporting portion is provided with a slotted hole, and the supporting seat is connected with the supporting portion through a bolt.
8. The test bed for testing the tightness of the crankshaft of the engine as claimed in claim 1, wherein a plurality of slotted holes are formed on two sides of the supporting seat, and the crankshaft support is connected with the slotted holes through bolts.
9. The test bed for testing the tightness of the engine crankshaft as claimed in claim 1, wherein the oil pump assembly is provided with a pressure gauge in a matching manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920859079.1U CN209927375U (en) | 2019-06-10 | 2019-06-10 | Test bed for testing engine crankshaft tightness |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920859079.1U CN209927375U (en) | 2019-06-10 | 2019-06-10 | Test bed for testing engine crankshaft tightness |
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| CN209927375U true CN209927375U (en) | 2020-01-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947933A (en) * | 2020-07-07 | 2020-11-17 | 南京航空航天大学 | Comprehensive test device and test method for leakage, heat transfer, friction and wear characteristics of aircraft engine dynamic seal |
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2019
- 2019-06-10 CN CN201920859079.1U patent/CN209927375U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947933A (en) * | 2020-07-07 | 2020-11-17 | 南京航空航天大学 | Comprehensive test device and test method for leakage, heat transfer, friction and wear characteristics of aircraft engine dynamic seal |
| CN111947933B (en) * | 2020-07-07 | 2022-04-22 | 南京航空航天大学 | Comprehensive test device and test method for leakage, heat transfer, friction and wear characteristics of aircraft engine dynamic seal |
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