CN210665069U

CN210665069U - Real-time output mechanism for engine piston temperature signal

Info

Publication number: CN210665069U
Application number: CN201921786658.4U
Authority: CN
Inventors: 宋单平; 伍黎; 王勇
Original assignee: Dongfeng Cummins Engine Co Ltd
Current assignee: Dongfeng Cummins Engine Co Ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-06-02
Anticipated expiration: 2029-10-23

Abstract

The utility model provides an engine piston temperature signal real-time output mechanism, including piston, connecting rod, the bent axle crank pin of installing inside the engine cylinder body, at the bottom erection joint seat of connecting rod, the one end of signal line derivation connecting rod articulates on the connecting seat, the other end of signal line derivation connecting rod articulates with the one end of signal line derivation crank, the other end of signal line derivation crank articulates on the fixing base; the upper end of the V-shaped support frame is connected to two sides of the lower end of the engine cylinder body, and the fixed seat is installed on the bottom of the V-shaped support frame; the thermocouple is arranged on a temperature measuring point of the piston, and a signal wire of the thermocouple is sequentially arranged along the connecting rod, the signal wire leading-out crank and one side of the V-shaped support frame and is led out from the joint of the V-shaped support frame and the engine cylinder body; the mechanism comprises a connecting rod, a signal wire leading-out crank and a V-shaped supporting frame, wherein wire grooves are formed in the V-shaped supporting frame, signal wires of thermocouples are embedded into the wire grooves to be fixed, and 4-5 cm is reserved for the signal wires of the thermocouples at the moving connection positions of all the parts.

Description

Real-time output mechanism for engine piston temperature signal

Technical Field

The utility model belongs to engine test field, concretely relates to real-time output mechanism of engine piston temperature signal.

Background

Temperature measurement of common parts usually uses a thermocouple to test a temperature measuring part, and temperature signals are output in a wired mode, but an engine piston is a high-speed reciprocating motion part, a crank connecting rod mechanism for driving the piston is also a high-speed rotating part, and the temperature signals cannot be transmitted out in a wired mode. At present, the temperature of the piston of the engine is measured by using a temperature plug, the method cannot output the temperature of the piston in real time, only can record the highest temperature of the piston in an operation project, and cannot meet the requirement of identifying the influence of the change of parameters such as the structure, the oil beam angle, the pressure, the calibration and the like of a combustion chamber on the real-time change of the temperature of the piston in the development of the performance of the engine. Some piston suppliers with strong testing capability use an inductance measurement principle to output piston signals, can only output signals at the bottom dead center position of the piston stroke, are expensive and cannot be popularized in engine performance development. Therefore, a transmission device for real-time output of the engine piston temperature signal needs to be designed innovatively for engineering practice.

Disclosure of Invention

An object of the utility model is to provide a real-time output mechanism of engine piston temperature signal, the signal line that passes through high temperature K type thermocouple with the piston temperature leads to outside the engine cylinder block from the piston of high-speed operation and crank link mechanism's complicated moving part, realizes accurate, the real-time transmission of temperature signal. The device has the advantages of simple structure, convenient installation, low price, convenient wide application, no limitation of engine models, stronger adaptability and higher precision.

The technical scheme of the utility model: the utility model discloses an engine piston temperature signal real-time output mechanism includes piston, connecting rod, bent axle crank pin of installing inside the engine cylinder body, installs the connecting seat in the bottom of connecting rod, and the one end that the signal line derived the connecting rod articulates on the connecting seat, and the other end that the signal line derived the connecting rod articulates with the one end that the signal line derived the crank, and the other end that the signal line derived the crank articulates on the fixing base; the upper end of the V-shaped support frame is connected to two sides of the lower end of the engine cylinder body, and the fixed seat is installed on the bottom of the V-shaped support frame; the thermocouple is arranged on a temperature measuring point of the piston, and a signal wire of the thermocouple is sequentially arranged along the connecting rod, the signal wire leading-out crank and one side of the V-shaped support frame and is led out from the joint of the V-shaped support frame and the engine cylinder body; the mechanism comprises a connecting rod, a signal wire leading-out crank and a V-shaped supporting frame, wherein wire grooves are formed in the V-shaped supporting frame, signal wires of thermocouples are embedded into the wire grooves to be fixed, and 4-5 cm is reserved in the signal wires of the thermocouples at the moving connection positions of all the parts and used for compensating the movement of the mechanism.

The wire groove is 2mm wide, and the signal wire of the thermocouple is buried in the wire groove 2 and covered and cured by a cast iron repairing agent.

The length of the signal line lead-out connecting rod is 130 +/-2 mm, the length of the signal line lead-out crank is 130 +/-2 mm, the fixing seat is arranged under the connecting seat, and the distance between the connecting seat and the fixing seat is 250-255 mm.

The first-order natural frequency of the V-shaped support frame is larger than 300Hz, and the influence of resonance on the reliability of the device is avoided.

The type of the thermocouple is K type, the temperature measurement range T is more than or equal to 500 ℃, the diameter of a signal wire of the thermocouple is more than or equal to 1mm and less than or equal to 1.5 mm.

The utility model has the advantages that: the utility model discloses a link mechanism comes out reciprocating type and the piston temperature detection signal line direction of the complicated motion of rotatory combination, avoids the signal line to stir absolutely at engine operation in-process. The utility model discloses simple structure, simple to operate, the low price, the wide application of being convenient for does not receive the restriction of engine model, and adaptability is stronger, and the precision is higher.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partially enlarged view of fig. 1 at a.

Detailed Description

The following describes the embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 is the general structure diagram of the utility model, an engine piston temperature signal real-time output mechanism, including piston 2, connecting rod 3, bent axle crank pin 4 installed inside the engine cylinder body 1, characterized in that, install the connecting seat 5 in the bottom of connecting rod 3, one end of the signal wire deriving connecting rod 6 is hinged on the connecting seat 5, the other end of the signal wire deriving connecting rod 6 is hinged with one end of the signal wire deriving crank 7, the other end of the signal wire deriving crank 7 is hinged on the fixing seat 9; the upper end of the V-shaped support frame 8 is connected to two sides of the lower end of the engine cylinder body 1, and the fixed seat 9 is installed on the bottom of the V-shaped support frame 8; the thermocouple 10 is arranged on a temperature measuring point of the piston 1, a wire groove 12 is formed in each of the mechanism comprising a connecting rod 3, a signal wire leading-out connecting rod 6, a signal wire leading-out crank 7 and a V-shaped support frame 8, a signal wire 11 of the thermocouple is sequentially arranged along one side of each of the connecting rod 3, the signal wire leading-out connecting rod 6, the signal wire leading-out crank 7 and the V-shaped support frame 8, and the signal wire 11 of the thermocouple is embedded into the wire groove 12 to be fixed and is led out from the joint of the V-shaped support frame 8 and the engine cylinder; and 5cm of signal wires of the thermocouples are reserved at the moving connection positions of all the parts and are used for compensating the movement of the mechanism.

The length that connecting rod 6 was derived to the signal line be 130 +/-2 mm, the length that crank 7 was derived to the signal line is 130 +/-2 mm, fixing base 9 is under connecting seat 5, the distance of connecting seat 5 and fixing base 9 is 250 ~ 255 mm.

The first-order natural frequency of the V-shaped support frame 8 is larger than 300Hz, and the influence of resonance on the reliability of the device is avoided.

The type of the thermocouple 10 is K type, the temperature measuring range T is more than or equal to 500 ℃, and the signal line straightness of the thermocouple is more than or equal to 1mm and less than or equal to 1.5 mm.

The connecting seat 5, the signal wire lead-out connecting rod 6, the signal wire lead-out crank 7 and the fixing seat 9 are connected through bearings, and the V-shaped supporting frame 8 is connected with the engine cylinder body 1 through bolts.

Fig. 2 is a partially enlarged view of fig. 1 at a:

the mechanism comprises a connecting rod 3, a signal wire leading-out connecting rod 6, a signal wire leading-out crank 7 and a V-shaped supporting frame 8, wherein wire grooves 12 are formed in the V-shaped supporting frame 8, the wire grooves 12 are 2mm wide, wires 9 are embedded into the wire grooves 12, finally, a cast iron 13 repairing agent is used for covering and curing, and the shadow part in a partial enlarged view is the curing area of the cast iron repairing agent. And after the solidification is finished, the cylinder body B is finally output and connected with data acquisition equipment. When the engine runs, the crankshaft crank pin 4 rotates clockwise according to the running track in the figure, the connecting rod 3 moves along with the crankshaft crank pin, the piston 2 moves up and down in a reciprocating mode under the driving of the connecting rod 3, the thermocouple of the piston 1 also moves up and down in a reciprocating mode, and the signal wire guide connecting rod 6 and the signal guide crank 7 respectively swing up and down and left and right under the driving of the connecting rod 3. The temperature signal is measured by a K-type thermocouple, is reliably output to the position B of the engine cylinder body in real time under the guidance of the mechanism through a signal wire, and is connected with data acquisition equipment to realize the accurate output of the real-time temperature signal of the piston.

The core of the utility model is that the piston temperature detection signal line of the complex motion of reciprocating type and rotation combination is guided out through the link mechanism, and the signal line is avoided stirring at the engine operation in-process and is broken. Therefore, all that utilize link mechanism to lead out reciprocating type and the piston temperature detection signal line of the complicated motion of rotation combination all belong to the utility model discloses a protection scope.

Claims

1. An engine piston temperature signal real-time output mechanism comprises a piston (2), a connecting rod (3) and a crankshaft crank pin (4) which are arranged inside an engine cylinder body (1), and is characterized in that a connecting seat (5) is arranged at the bottom end of the connecting rod (3), one end of a signal wire lead-out connecting rod (6) is hinged to the connecting seat (5), the other end of the signal wire lead-out connecting rod (6) is hinged to one end of a signal wire lead-out crank (7), and the other end of the signal wire lead-out crank (7) is hinged to a fixing seat (9); the upper end of the V-shaped support frame (8) is connected to two sides of the lower end of the engine cylinder body (1), and the fixed seat (9) is installed on the bottom of the V-shaped support frame (8); a thermocouple (10) is arranged on a temperature measuring point of the piston (2), a signal wire (11) of the thermocouple is sequentially arranged along one side of the connecting rod (3), the signal wire leading-out connecting rod (6), the signal wire leading-out crank (7) and the V-shaped support frame (8) and is led out from the joint of the V-shaped support frame (8) and the engine cylinder body (1); the mechanism comprises a connecting rod (3), a signal wire leading-out connecting rod (6), a signal wire leading-out crank (7) and a V-shaped supporting frame (8), wherein wire grooves (12) are formed in the connecting rod, the signal wire (11) of the thermocouple is embedded into the wire grooves (12) to be fixed, and 4-5 cm is reserved for the signal wire of the thermocouple at the motion connection position of each component and is used for compensating the motion of the mechanism.

2. The engine piston temperature signal real-time output mechanism of claim 1, characterized in that: the width of the wire groove (12) is 2mm, and a signal wire (11) of the thermocouple is embedded in the wire groove (12) and covered and cured by a cast iron repairing agent (13).

3. The engine piston temperature signal real-time output mechanism according to claim 1 or 2, characterized in that: the length that connecting rod (6) were derived to the signal line be 130 +/-2 mm, the length that crank (7) were derived to the signal line is 130 +/-2 mm, fixing base (9) are under connecting base (5), the distance of connecting base (5) and fixing base (9) is 250 ~ 255 mm.

4. The engine piston temperature signal real-time output mechanism according to claim 1 or 2, characterized in that: the first-order natural frequency of the V-shaped support frame (8) is larger than 300Hz, and the influence of resonance on the reliability of the device is avoided.

5. The engine piston temperature signal real-time output mechanism according to claim 1 or 2, characterized in that: the type of the thermocouple (10) is K type, the temperature measurement range T is more than or equal to 500 ℃, and the diameter of a signal wire of the thermocouple is more than or equal to 1mm and less than or equal to 1.5 mm.