Explosion pressure sensor sheath assembly
By designing a burst pressure sensor sheath assembly with threaded connections and step-resistant, the problem of seal failure in the prior art is solved, and the fastening and sealing reliability is achieved in high temperature and high pressure environments, improving the accuracy of test data and engine reliability.
Patent Information
- Application Number
- CN202422670477.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-31
AI Technical Summary
The existing explosive pressure sensor sheath is prone to loosen the cylinder head waterway cavity under high temperature, high pressure and vibration environments, resulting in seal failure and disassembly difficulties, affecting the accuracy of test data acquisition and the reliability of the test machine.
A burst pressure sensor sheath assembly is designed, which uses a threaded connecting locking member at the upper end of the sheath body to tighten with the upper end of the cylinder head, and the step portion at the lower end is abutting against the inner steps of the lower end of the cylinder head cavity, and is equipped with a seal to ensure tightness through threaded connection and step abutment, and combines the O-ring and sealing gasket to improve sealing performance.
It effectively avoids loosening of the sheath and cylinder head water channel cavity, ensures the sealing effect, improves the accuracy of test data acquisition and the operating reliability of the test machine, prevents coolant from entering the cylinder, and avoids engine failure.
Smart Images
Figure CN223243827U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine testing, in particular to a burst pressure sensor sheath component. Background Art
[0002] During engine performance calibration tests, it is necessary to monitor cylinder pressure in real time during engine operation and the combustion process. This allows for optimal fuel injection and ignition timing calibration data, improving engine combustion efficiency and horsepower output while reducing exhaust emissions and fuel consumption, thereby enhancing engine performance and reliability. Currently, a burst pressure sensor is required to extend from the top of the cylinder head through the cylinder head water channel, through the bottom of the cylinder head, and into the combustion chamber to monitor cylinder pressure in real time during engine operation. The burst pressure sensor sheath, which runs from the top to the bottom of the cylinder head, through the cylinder head water channel and into the combustion chamber, protects and installs the burst pressure sensor and serves as the channel for collecting combustion chamber pressure.
[0003] The overall structure of the existing explosion pressure sensor sheath is relatively simple and easy to install. However, during the test process, faced with adverse factors such as high temperature, high pressure, vibration and reverse torque when removing the explosion pressure sensor, the explosion pressure sensor sheath and the cylinder head water channel cavity often become loose, resulting in coolant entering the cylinder and seal failure. This seriously affects the accuracy of test data collection and the operating efficiency and reliability of the test machine. When a large amount of coolant enters the cylinder, once the engine is started, it will cause the connecting rod to bend and the piston to hit the cylinder, causing serious damage to the test machine. In addition, the existing explosion pressure sensor sheath has the problem of being unable to be disassembled and replaced due to failure of the fit. Therefore, how to provide a explosion pressure sensor sheath assembly with a tight connection and reliable sealing is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content
[0004] The utility model aims to provide a burst pressure sensor sheath assembly, which solves the technical problem that the existing burst pressure sensor sheath often loosens with the cylinder head water channel cavity, causing coolant to enter the cylinder and seal failure.
[0005] To achieve the above-mentioned object, the present invention provides a burst pressure sensor sheath assembly, comprising a sheath body, wherein the upper end of the sheath body is provided with a first thread, a locking member is threadedly connected to the first thread, and the locking member is used to abut against the upper end of the cylinder head to connect the sheath body and the cylinder head;
[0006] A connecting hole is provided at the upper end of the sheath body, and the connecting hole is used for installing and removing the sheath body;
[0007] The lower end of the sheath body is provided with a second thread for threaded connection with the water channel cavity at the lower end of the cylinder head, and the lower end of the sheath body is provided with a third thread for mounting an explosion pressure sensor;
[0008] The lower end of the sleeve body is provided with a step portion for abutting against the inner step of the lower end cavity of the cylinder head.
[0009] Preferably, a first sealing member is provided at the step portion, and the first sealing member is used to be provided between the step portion and the inner step of the lower end cavity of the cylinder head.
[0010] Preferably, the first sealing member is a sealing gasket.
[0011] Preferably, a second sealing member is provided outside the jacket body, and the second sealing member is located at the upper portion of the jacket body, and the second sealing member is used to seal the jacket body and the water channel cavity at the upper end of the cylinder head.
[0012] Preferably, the second sealing member is an O-ring.
[0013] Preferably, the first thread is an external thread.
[0014] Preferably, the second thread is an external thread.
[0015] Preferably, the third thread is an internal thread.
[0016] Preferably, the connecting hole is a hexagonal hole.
[0017] Compared with the above-mentioned background technology, the explosion pressure sensor sheath assembly provided by the utility model has a step portion at the lower end of the sheath body abutting against the step inside the cavity at the lower end of the cylinder head, a second thread at the lower end of the sheath body and a threaded connection between the water channel cavity at the lower end of the cylinder head, and a locking piece threadedly connected to the first thread at the upper end of the sheath body. By rotating the locking piece, the bottom of the locking piece is pressed against the upper end of the cylinder head, thereby connecting the sheath body to the cylinder head. The tight connection between the sheath body and the cylinder head can avoid loosening of the fit between the sheath body and the water channel cavity of the cylinder head, ensure the sealing effect, and improve the accuracy of test data acquisition and the reliability of the test machine operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.
[0019] Figure 1 A schematic structural diagram of a burst pressure sensor sheath assembly provided by an embodiment of the present utility model;
[0020] Figure 2A schematic cross-sectional view of a sheath assembly of a burst pressure sensor provided by an embodiment of the present utility model;
[0021] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;
[0022] Figure 4 for Figure 2 A partial enlarged view of point B in the middle.
[0023] Figures 1 to 4 Reference numerals in the accompanying drawings: 10, sheath body; 11, first thread; 12, locking member; 13, connecting hole; 14, second thread; 15, third thread; 16, step portion; 17, first sealing member; 18, second sealing member. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0025] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0026] The core purpose of the utility model is to provide a burst pressure sensor sheath assembly for engine testing. The burst pressure sensor sheath assembly is tightly matched with the cylinder head water channel cavity, has reliable sealing, and is easy to disassemble and assemble.
[0027] Please refer to Figures 1 to 4 The explosion pressure sensor housing assembly provided by the present invention includes a housing body 10. A first thread 11 is provided at the upper end of the housing body 10. A locking member 12 is threadedly connected to the first thread 11. The locking member 12 is used to abut against the upper end of the cylinder head to connect the housing body 10 and the cylinder head. A connecting hole 13 is provided at the upper end of the housing body 10 for installation and removal of the housing body 10. A second thread 14 is provided at the lower end of the housing body 10 for threaded connection with the water channel cavity at the lower end of the cylinder head. A third thread 15 is provided at the lower end of the housing body 10 for mounting the explosion pressure sensor. A step 16 is provided at the lower end of the housing body 10 for abutting against the internal step of the cavity at the lower end of the cylinder head. The locking member 12 is a nut.
[0028] The sleeve body 10 is generally a hollow tubular structure. When the sleeve body 10 is assembled with the cylinder head, the step portion 16 at the lower end of the sleeve body 10 abuts against the step inside the lower end cavity of the cylinder head. The second thread 14 at the lower end of the sleeve body 10 is threadedly connected to the water channel cavity at the lower end of the cylinder head. The explosion pressure sensor is threadedly connected to the lower end of the sleeve body 10 via the third thread 15. The first thread 11 at the upper end of the sleeve body 10 is threadedly connected to a locking member 12. By rotating the locking member 12, the bottom of the locking member 12 abuts against the upper end of the cylinder head, thereby fastening the sleeve body 10 to the cylinder head. When installing or removing, a tool is inserted into the connection hole 13 at the upper end of the sleeve body 10. As the tool rotates, the sleeve body 10 is driven to rotate, making installation and removal convenient.
[0029] In this way, the lower end of the sleeve body 10 is connected to the lower end of the cylinder head cavity by the second thread 14 and the step portion 16, and the upper end of the sleeve body 10 is connected to the upper end of the cylinder head cavity by the locking piece 12. The sleeve body 10 and the cylinder head are tightly connected. During the test, in the face of factors such as high temperature, high pressure, vibration and reverse torque when disassembling the explosion pressure sensor, the loosening of the sleeve body 10 and the cylinder head water channel cavity is avoided, and the sealing effect is guaranteed, thereby improving the accuracy of test data collection and the reliability of the test machine operation.
[0030] In other embodiments, in addition to providing a first thread 11 and a locking member 12 at the upper end of the sleeve body 10 to realize the connection between the upper end of the sleeve body 10 and the upper end of the cylinder head cavity, the upper end of the sleeve body 10 and the upper end of the cylinder head cavity can also be connected by a pressure block or a pressure plate. For example, a fixing plate is connected to the upper end of the sleeve body 10, and a bolt is threaded on the fixing plate. One end of the bolt is fixedly connected to the pressure block or pressure plate. When in use, the pressure block or pressure plate is driven to approach and press against the upper end of the cylinder head by rotating the bolt.
[0031] Please refer to Figure 1 、 Figure 2 and Figure 3 The explosion pressure sensor sheath assembly provided by the utility model is provided with a first sealing member 17 at the step portion 16. The first sealing member 17 is used to be arranged between the step portion 16 and the step inside the lower end cavity of the cylinder head. The two sides of the first sealing member 17 are respectively against the step portion 16 and the step inside the lower end cavity of the cylinder head. The first sealing member 17 fills the gap between the step portion 16 and the step inside the lower end cavity of the cylinder head to ensure the sealing effect.
[0032] Preferably, the first sealing member 17 is a sealing gasket. The first sealing member 17 may be a copper gasket. The copper gasket has excellent high-pressure and high-temperature resistance, is suitable for high-temperature and high-pressure environments during engine testing, and has high reliability.
[0033] Please refer to Figure 1 、 Figure 2 and Figure 4 The explosion pressure sensor housing assembly provided by the present invention features a second seal 18 externally mounted on the housing body 10. This seal 18 is located above the housing body 10 and serves to seal the housing body 10 against the water channel cavity at the upper end of the cylinder head. This seal 18 fits over the housing body 10. When assembled with the cylinder head, it fills the gap between the housing body 10 and the water channel cavity at the upper end of the cylinder head, preventing coolant leakage and improving the sealing capability.
[0034] Preferably, the second sealing member 18 is an O-ring. The second sealing member 18 can be an O-ring made of rubber. The rubber ring is wear-resistant, heat-resistant, oil-resistant, and can withstand a certain pressure. It has good waterproof sealing effect and is widely used in various complex environments.
[0035] Please refer to Figure 1 、 Figure 2 and Figure 4 The explosion pressure sensor sheath assembly provided by the utility model has a first thread 11 which is an external thread, and a locking piece 12 is threadedly connected to the sheath body 10 through the first thread 11. By rotating the locking piece 12, the bottom of the locking piece 12 is pressed against the upper end of the cylinder head, thereby fastening the sheath body 10 to the cylinder head.
[0036] Please refer to Figure 1 、 Figure 2 and Figure 3 The utility model provides a burst pressure sensor sheath assembly, the second thread 14 is an external thread, the second thread 14 cooperates with the internal thread of the water channel cavity at the lower end of the cylinder head, thereby connecting the sheath body 10 to the lower end of the cylinder head.
[0037] Please refer to Figure 1 、 Figure 2 and Figure 3 The utility model provides a burst pressure sensor sheath assembly, the third thread 15 is an internal thread, the burst pressure sensor cooperates with the third thread 15, and the burst pressure sensor is installed on the lower end of the sheath body 10 by threaded connection.
[0038] Please refer to Figure 1 、 Figure 2 and Figure 4 The explosion pressure sensor sheath assembly provided by the present invention features a hexagonal connection hole 13 located inside the upper end of the sheath body 10. This hexagonal hole is designed to be used with an Allen wrench to facilitate installation and removal of the sheath body 10. During installation, one end of the Allen wrench is inserted into the connection hole 13, and the sheath body 10 is rotated by turning the Allen wrench to install or remove it.
[0039] The installation method of the explosion pressure sensor sheath assembly provided by the utility model is as follows:
[0040] First, the base hole and thread for installing the explosion pressure sensor sheath assembly must be processed on the cylinder head of the test engine. The thread processed on the cylinder head here is an internal thread for connecting with the second thread 14.
[0041] 2. When assembling the explosion pressure sensor sheath assembly, apply a proper amount of vaseline to the O-ring at the upper end of the sheath body 10 for lubrication, then insert the sealing copper washer into the step 16 at the lower end of the sheath body 10, apply a proper amount of thread fastening sealant on the second thread 14 at the lower end of the sheath body 10, insert the sheath body 10 from the upper end base hole of the cylinder head, and the second thread 14 at the lower end of the sheath body 10 is matched with the internal thread of the base hole at the lower end of the cylinder head. Rotate the connecting hole 13 at the upper end of the sheath body 10 and tighten it to the specified torque.
[0042] 3. Insert an L-shaped hexagonal screwdriver wrench into the connecting hole 13 at the upper end of the sheath body 10 and hold the sheath body 10. Then tighten the locking piece 12 at the upper end of the sheath body 10 to the specified torque to complete the installation of the explosion pressure sensor sheath assembly.
[0043] The explosion pressure sensor sheath assembly provided by the present invention adopts an integrated structural design with an internal connecting hole 13, compared with the traditional method of riveting an external hexagonal head on the head of the explosion pressure sensor sheath, which solves the problem that the explosion pressure sensor sheath is difficult to disassemble due to the loose fit between the riveted external hexagonal head and the sheath; a first thread 11 and a locking piece 12 are provided at the upper end of the sheath body 10, so that the upper end of the sheath body 10 and the water channel cavity at the upper end of the cylinder head are more tightly connected, solving the problems of easy loosening and sealing failure of the explosion pressure sensor sheath, and also avoiding the problem of the explosion pressure sensor sheath being loosened due to the reverse torque when disassembling the explosion pressure sensor.
[0044] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.
[0045] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.
Claims
1. A burst pressure sensor sheath assembly, characterized in that: The sleeve body comprises a first thread on the upper end of the sleeve body, a locking member is threadedly connected to the first thread, and the locking member is used to abut against the upper end of the cylinder head to connect the sleeve body and the cylinder head; A connecting hole is provided at the upper end of the sheath body, and the connecting hole is used for installing and removing the sheath body; The lower end of the sheath body is provided with a second thread for threaded connection with the water channel cavity at the lower end of the cylinder head, and the lower end of the sheath body is provided with a third thread for mounting an explosion pressure sensor; The lower end of the sleeve body is provided with a step portion for abutting against the inner step of the lower end cavity of the cylinder head.
2. The explosion pressure sensor sheath assembly according to claim 1, characterized in that: A first sealing member is provided at the step portion, and the first sealing member is used to be provided between the step portion and the inner step of the lower end cavity of the cylinder head.
3. The explosion pressure sensor sheath assembly according to claim 2, characterized in that: The first sealing member is a sealing gasket.
4. The explosion pressure sensor sheath assembly according to claim 3, characterized in that: A second sealing member is provided outside the jacket body. The second sealing member is located at the upper portion of the jacket body. The second sealing member is used to seal the jacket body and the water channel cavity at the upper end of the cylinder head.
5. The explosion pressure sensor sheath assembly according to claim 4, characterized in that: The second sealing member is an O-ring.
6. The explosion pressure sensor sheath assembly according to claim 4, characterized in that: The first thread is an external thread.
7. The explosion pressure sensor sheath assembly according to claim 6, characterized in that: The second thread is an external thread.
8. The explosion pressure sensor sheath assembly according to claim 7, characterized in that: The third thread is an internal thread.
9. The explosion pressure sensor sheath assembly according to any one of claims 1 to 8, characterized in that: The connecting hole is a hexagonal hole.