Pulsating pressure measuring structure of thick-wall groove milling piece

Abstract

The invention discloses a pulsating pressure measuring structure of a thick-wall groove milling piece, which comprises a thick-wall groove milling piece inner wall and a thick-wall groove milling piece outer wall, a plurality of parallel milling grooves are formed in the thick-wall groove milling piece inner wall, and a pulsating pressure sensor base is integrally formed in the thick-wall groove milling piece inner wall. A first pulsating pressure sensor mounting hole is coaxially formed in the pulsating pressure sensor base; the pulsating pressure sensor base cuts off a part of the plurality of parallel milling grooves to form a plurality of non-communicated milling grooves; the inner wall of the thick-wall groove milling piece is also provided with an annular flow-around channel, and the annular flow-around channel is located around the pulsating pressure sensor base, so that the plurality of non-communicated milling grooves are communicated with each other. According to the pulsating pressure measuring structure, it is guaranteed that the pulsating pressure sensor is flush with the inner wall face of the inner wall of the thick-wall groove milling piece, it is avoided that due to the fact that the pulsating pressure sensor retracts too short, extra low resonance frequency occurs in the measuring cavity, and the measuring result is affected, and the technical problem that the pulsating pressure sensor in the thick-wall groove milling piece retracts deeply is solved.

Description

Technical Field

[0001] The present invention belongs to the field of pulsating pressure measurement, relates to thick-walled grooved parts, and specifically relates to a pulsating pressure measurement structure for thick-walled grooved parts. Background Art

[0002] Liquid rocket engines often use products with grooved structures, and it is often necessary to measure the pulsating pressure in the inner cavity of these grooved structure products. When the thickness of the inner and outer walls of the grooved part is relatively thick, if the structure of directly welding a nozzle on the outer wall is used for pressure measurement, the end of the sensor will be retracted deeper into the inner cavity. When the sound speed of the medium in the inner cavity is relatively low, if the pressure measurement structure has a deep retraction into the cavity, it will cause an additional lower resonance frequency in the measurement cavity, affecting the measurement result. Summary of the Invention

[0003] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to provide a pulsating pressure measurement structure for thick-walled grooved parts to solve the technical problem that the pulsating pressure sensor in the thick-walled grooved parts of the prior art is retracted deeper.

[0004] To solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0005] A pulsating pressure measurement structure for thick-walled grooved parts includes the inner wall of the thick-walled grooved part. An outer wall of the thick-walled grooved part is arranged outside the inner wall of the thick-walled grooved part. A plurality of parallel grooves are formed on the surface of the inner wall of the thick-walled grooved part close to the outer wall of the thick-walled grooved part. It is characterized in that:

[0006] A pulsating pressure sensor base is integrally formed in the inner wall of the thick-walled grooved part. The end face of the pulsating pressure sensor base contacts the outer wall of the thick-walled grooved part. A first pulsating pressure sensor installation hole is coaxially formed inside the pulsating pressure sensor base.

[0007] The pulsating pressure sensor base truncates a part of the plurality of parallel grooves to form a plurality of non-connected grooves; an annular bypass channel is further formed in the inner wall of the thick-walled grooved part. The annular bypass channel is located around the pulsating pressure sensor base and is coaxially arranged with the pulsating pressure sensor base. The annular bypass channel connects the plurality of non-connected grooves with each other.

[0008] A second pulsating pressure sensor installation hole is formed on the outer wall of the thick-walled grooved part. The second pulsating pressure sensor installation hole and the first pulsating pressure sensor installation hole are coaxially arranged with the same diameter. A seal for installing a pulsating pressure sensor is arranged at one end of the second pulsating pressure sensor installation hole far from the pulsating pressure sensor base.

[0009] The present invention also has the following technical features:

[0010] The end face of the pulsating pressure sensor base close to the outer wall of the thick-walled milled groove part is coaxially provided with a brazing ring groove.

[0011] The brazing ring groove is filled with brazing filler metal.

[0012] The pulsating pressure sensor base is circular.

[0013] The diameters of the second pulsating pressure sensor mounting hole and the first pulsating pressure sensor mounting hole are both larger than the diameter of the pulsating pressure sensor.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] (Ⅰ) The pulsating pressure measurement structure proposed by the present invention can ensure that the pulsating pressure sensor is flush with the inner wall surface of the thick-walled milled groove part of the thick-walled milled groove part, avoiding the pulsating pressure sensor being indented too short, resulting in an additional lower resonance frequency in the measurement cavity and affecting the measurement result, and solving the technical problem that the pulsating pressure sensor in the thick-walled milled groove part is indented deeper.

[0016] (Ⅱ) The pulsating pressure measurement structure proposed by the present invention can ensure that there is fluid flow in each milled groove channel in the inner wall of the thick-walled milled groove part, ensuring the cooling reliability of the milled groove part itself and the pulsating pressure sensor.

[0017] (Ⅲ) The pulsating pressure measurement structure of the thick-walled milled groove part proposed by the present invention can eliminate the need for a dedicated pressure pulsation nozzle, reduce the number of parts, has a simple structure, and improves the reliability of the pulsating pressure sensor. Description of the Drawings

[0018] Figure 1 It is a schematic cross-sectional view of the pulsating pressure measurement structure in the thick-walled milled groove part.

[0019] Figure 2 It is a schematic front view structure of the pulsating pressure measurement structure in the thick-walled milled groove part.

[0020] The meanings of the various reference numerals in the figure are as follows:

[0021] 1-inner wall of the thick-walled milled groove part, 2-outer wall of the thick-walled milled groove part, 3-pulsating pressure sensor base, 4-first pulsating pressure sensor mounting hole, 5-milled groove, 6-annular bypass channel, 7-second pulsating pressure sensor mounting hole, 8-seal, 9-brazing ring groove.

[0022] The following further explains the specific content of the present invention in detail in conjunction with embodiments. Detailed Embodiment

[0023] It should be noted that the equipment and materials used in the present invention, unless otherwise specified, are all the equipment and materials known in the prior art.

[0024] In the present invention, the thickness range of the thick-walled grooved part is generally above 15 mm.

[0025] In compliance with the above technical solution, the following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and any equivalent transformation based on the technical solution of this application falls within the protection scope of the present invention.

[0026] Embodiment:

[0027] This embodiment provides a pulsating pressure measurement structure for a thick-walled grooved part, including the inner wall 1 of the thick-walled grooved part, as Figure 1 and Figure 2 shown. An outer wall 2 of the thick-walled grooved part is arranged outside the inner wall 1 of the thick-walled grooved part. A plurality of parallel milling grooves 5 are formed on the surface of the inner wall 1 of the thick-walled grooved part close to the outer wall 2 of the thick-walled grooved part.

[0028] As Figure 1 and Figure 2 shown, a pulsating pressure sensor base 3 is integrally formed in the inner wall 1 of the thick-walled grooved part. The end face of the pulsating pressure sensor base 3 is in contact with the outer wall 2 of the thick-walled grooved part; a first pulsating pressure sensor installation hole 4 is coaxially formed inside the pulsating pressure sensor base 3.

[0029] As Figure 1 and Figure 2 shown, the pulsating pressure sensor base 3 cuts off a part of the plurality of parallel milling grooves 5 to form a plurality of non-connected milling grooves 5; an annular flow-around channel 6 is further formed in the inner wall 1 of the thick-walled grooved part. The annular flow-around channel 6 is located around the pulsating pressure sensor base 3. The annular flow-around channel 6 is coaxially arranged with the pulsating pressure sensor base 3, and the annular flow-around channel 6 connects the plurality of non-connected milling grooves 5 to each other.

[0030] As Figure 1 shown, a second pulsating pressure sensor installation hole 7 is formed in the outer wall 2 of the thick-walled grooved part. The second pulsating pressure sensor installation hole 7 and the first pulsating pressure sensor installation hole 4 are coaxially arranged with the same diameter. A seal 8 for installing a pulsating pressure sensor is arranged at one end of the second pulsating pressure sensor installation hole 7 away from the pulsating pressure sensor base 3.

[0031] As a preferred solution of this embodiment, as Figure 1 and Figure 2 shown, a brazing ring groove 9 is coaxially formed on the end face of the pulsating pressure sensor base 3 close to the outer wall 2 of the thick-walled grooved part.

[0032] As a preferred solution of this embodiment, the brazing ring groove 9 is filled with brazing material.

[0033] As a preferred solution of this embodiment, the pulsating pressure sensor base 3 is circular.

[0034] As a preferred solution of this embodiment, the diameters of the second pulsating pressure sensor mounting hole 7 and the first pulsating pressure sensor mounting hole 4 are both larger than the diameter of the pulsating pressure sensor.

[0035] As a preferred solution of this embodiment, the annular flow-around channel 6 connects multiple non-connected milling grooves 5 to each other to enable the flow of fluid.

[0036] As a preferred solution of this embodiment, the first pulsating pressure sensor mounting hole 4, the second pulsating pressure sensor mounting hole 7 and the pulsating pressure sensor base 3 are coaxially arranged.

[0037] As a preferred solution of this embodiment, the thick-walled milling groove part includes a thick-walled milling groove part inner wall 1 and a thick-walled milling groove part outer wall 2. A plurality of parallel milling grooves 5 are formed on the surface of the thick-walled milling groove part inner wall 1 close to the thick-walled milling groove part outer wall 2. A pulsating pressure sensor base 3 is arranged on the thick-walled milling groove part inner wall 1. The pulsating pressure sensor base 3 is integrally formed in the thick-walled milling groove part inner wall 1. A plurality of annular flow-around channels 6 are also formed in the thick-walled milling groove part inner wall 1. The annular flow-around channels 6 are located around the pulsating pressure sensor base 3. The annular flow-around channels 6 and the pulsating pressure sensor base 3 are coaxially arranged. The annular flow-around channels 6 connect multiple non-connected milling grooves 5 to each other, enabling the fluid to flow around in the annular flow-around channels 6 at the pulsating pressure sensor base 3 and then continue to flow into the milling groove 5 channels downstream of the pulsating pressure sensor base 3, so that there is fluid flow in each milling groove 5 channel upstream and downstream of the pulsating pressure sensor base 3, ensuring the cooling reliability of the milling groove part itself and the pulsating pressure sensor, and at the same time solving the technical problem that the pulsating pressure sensor in the thick-walled milling groove part is indented deeper.

Claims

1. A pulsating pressure measurement structure for a thick-walled grooved part, including the inner wall (1) of the thick-walled grooved part. An outer wall (2) of the thick-walled grooved part is arranged outside the inner wall (1) of the thick-walled grooved part. A plurality of parallel milling grooves (5) are formed on the surface of the inner wall (1) of the thick-walled grooved part close to the outer wall (2) of the thick-walled grooved part. It is characterized in that: A pulsating pressure sensor base (3) is integrally formed in the inner wall (1) of the thick-walled grooved part. The end face of the pulsating pressure sensor base (3) is in contact with the outer wall (2) of the thick-walled grooved part; a first pulsating pressure sensor installation hole (4) is coaxially opened inside the pulsating pressure sensor base (3); The pulsating pressure sensor base (3) truncates a part of the plurality of parallel milling grooves (5) to form a plurality of non-connected milling grooves (5); an annular flow-around channel (6) is also formed in the inner wall (1) of the thick-walled grooved part. The annular flow-around channel (6) is located around the pulsating pressure sensor base (3). The annular flow-around channel (6) is coaxially arranged with the pulsating pressure sensor base (3). The annular flow-around channel (6) connects the plurality of non-connected milling grooves (5) to each other; A second pulsating pressure sensor installation hole (7) is formed in the outer wall (2) of the thick-walled grooved part. The second pulsating pressure sensor installation hole (7) and the first pulsating pressure sensor installation hole (4) are coaxially arranged with the same diameter. A seal (8) for installing a pulsating pressure sensor is arranged at one end of the second pulsating pressure sensor installation hole (7) away from the pulsating pressure sensor base (3).

2. The pulsating pressure measurement structure of the thick-walled grooving part as described in claim 1, characterized in that, A brazing ring groove (9) is coaxially opened on the end face of the pulsating pressure sensor base (3) close to the outer wall (2) of the thick-walled grooved part.

3. The pulsating pressure measuring structure of the thick-walled grooving part according to claim 2, characterized in that, The brazing ring groove (9) is filled with brazing filler metal.

4. The pulsating pressure measurement structure of the thick-walled grooved part according to claim 1, characterized in that, The pulsating pressure sensor base (3) is circular.

5. The pulsating pressure measurement structure of the thick-walled grooved part according to claim 1, characterized in that, The diameters of the second pulsating pressure sensor installation hole (7) and the first pulsating pressure sensor installation hole (4) are both larger than the diameter of the pulsating pressure sensor.

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