Servo shaft tightness test method and tool thereof
By accurately measuring and designing the servo shaft density test tooling, and performing density tests on the inner, outer and bronze guide sleeves of the servo oil pipes in turn, the problem of quality inspection of servo shaft seal installation is solved, and comprehensive coverage and efficient inspection of the servo shaft test is achieved, avoiding rework and reducing production costs.
Patent Information
- Application Number
- CN202510111716.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-03-25
AI Technical Summary
The internal structure of the servo shaft is complex, and the existing density test methods are difficult to meet the quality inspection requirements of its seal installation, which may result in the possibility of failing the pitch test after loading on the ship, resulting in rework.
A servo shaft tightness test method is provided. By measuring and making a density test tool in sequence, the servo oil pipe, the outside of the servo oil pipe, the bronze guide sleeve and other parts are subjected to a denseness test, including filling oil into different oil ports of the servo oil pipe, and pumping 8MPa into different oil ports of the servo oil pipe, and checking the density of each sealing point.
Ensure a comprehensive test of servo shaft tightness, avoid rework due to unqualified seal installation, improve the accuracy and efficiency of denseness tests, reduce rework and scrapping caused by size mismatch, and reduce production costs.
Smart Images
Figure CN119688178A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of servo shaft tightness testing, in particular to a servo shaft tightness testing method and tooling thereof. Background Art
[0002] Since the servo shaft has three layers of structure, namely bronze guide sleeve, servo oil pipe (inside) and servo oil pipe (outside), which are separated by seals to form independent spaces, most seals are deep-hole installed, and the reliability of their installation has a certain randomness. Therefore, after the servo shaft is assembled in the workshop, it is necessary to carry out hydraulic test from the forward and reverse pitch oil ports inward to check whether the installation quality of each seal is qualified, so as to avoid rework caused by the pitch test after the servo shaft is fully installed on the ship. However, the internal structure of the servo shaft is complex, and the general tightness test method cannot meet its requirements. Summary of the invention
[0003] The object of the present invention is to provide a servo shaft tightness test method and tooling thereof to solve the problems raised in the above background technology.
[0004] To achieve the above object, the present invention provides the following technical solution: a servo shaft tightness test method, comprising the following steps: S1. Measure the length of the servo oil pipe and the hole diameter at both ends, and make the corresponding tightness test tooling; S2. Place the servo oil pipe on the tightness test fixture, fill the servo oil pipe with oil, connect the hand pump hydraulic pipe after it is full, pump pressure 8MPa, and check the tightness of the servo oil pipe; S3. After assembling the inner and outer servo oil pipes, measure the journal and end flange structure of the outer servo oil pipe, and make the corresponding tightness test tooling; S4. Install the tightness test fixture on the outside of the servo oil pipe, and then fill the servo oil pipe with oil from the tightness test fixture. After it is full, connect the hand pump hydraulic pipe, pump pressure 8MPa, and check the tightness of seal 4; S5. After assembling the servo oil pipe inner and outer parts, servo shaft, bronze guide sleeve and positioning sleeve, measure the servo shaft diameter and the forward and reverse pitch oil ports apertures, and make the corresponding tightness test fixture; S6. Install the tightness test fixture on the servo shaft, and fill the reverse pitch oil port with oil from the tightness test fixture. After it is full, connect the hand pump hydraulic pipe, pump pressure 8MPa, and check the tightness of seals 1, 5, 6, 7, 8, and 9; S7. Adjust the position of the sealing test fixture, and fill oil into the forward car pitch oil port from the tightness test fixture. After it is full, connect the hand pump hydraulic pipe, pump pressure 8MPa, and check the tightness of seals 2, 3, and 4.
[0005] In step S2, when filling the servo oil pipe with oil, the servo oil pipe needs to be erected first, and then laid flat after it is filled.
[0006] Furthermore, in step S4, when oil is poured into the outside of the servo oil pipe from the tightness test fixture, the outside of the servo oil pipe needs to be laid flat.
[0007] Furthermore, in step S6, when filling oil from the tightness test fixture into the reverse pitch oil port, the servo shaft needs to be laid flat with the reverse pitch oil port facing upward.
[0008] Furthermore, in step S7, when filling oil from the tightness test fixture into the positive turning pitch oil port, the servo shaft needs to be laid flat with the positive turning pitch oil port facing upward.
[0009] A servo shaft tightness test tool, including an oil pipe inner tightness test tool, an oil pipe outer tightness test tool, and an oil port tightness test tool; The oil pipe inner tightness test tool is used for the tightness test inside the servo oil pipe, the oil pipe outer tightness test tool is used for the tightness test between the inside and outside of the servo oil pipe, and the oil port tightness test tool is used for the tightness test inside the servo shaft. Furthermore, the oil pipe internal tightness test tooling includes a supporting platform, the length of the supporting platform is greater than the length inside the servo oil pipe, and a bulkhead assembly 1 and a bulkhead assembly 2 are installed on the top of the supporting platform. The bulkhead assembly 1 and the bulkhead assembly 2 are respectively sealed at the left and right ends of the servo oil pipe, and the bulkhead assembly 2 has the same structure as the bulkhead assembly 1, and a connecting channel is opened in the bulkhead assembly 2.
[0010] Furthermore, the oil pipe external tightness test tooling includes a blind head assembly three and a test cavity. The blind head assembly three is sealed on the left end of the servo oil pipe, the test cavity is slidably sleeved on the outside of the servo oil pipe, and two sealing rings are fixedly installed in the test cavity, the sealing rings are sleeved on the outside of the servo oil pipe, and the two sealing rings are respectively located on both sides of the oil inlet on the outside of the servo oil pipe. The structure of the blind head assembly three is the same as the support platform.
[0011] Furthermore, the oil port tightness test fixture includes an upper plate and a lower plate, and the upper plate and the lower plate are connected by a long screw rod. A blind head assembly four is fixedly installed on the outer wall of the upper plate facing the lower plate, and a rubber pad is fixedly installed on the outer wall of the lower plate facing the upper plate. The structure of the blind head assembly four is the same as that of the blind head assembly two.
[0012] Furthermore, the first bulkhead assembly includes a sealing plate, an adjusting screw and a sealing bulkhead, wherein the sealing bulkhead is fixedly mounted on the sealing plate, the adjusting screw is fixedly connected to the sealing plate, and a fastening nut is provided on the adjusting screw.
[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. By sequentially conducting tightness tests on the inside of the servo oil pipe, the sealing bronze guide sleeve at the connection between the inside and outside of the servo oil pipe, seals 2, 3, and 4 connected to the forward pitch oil port, and seals 1, 5, 6, 7, 8, and 9 connected to the reverse pitch oil port, the servo shaft tightness can be fully tested to avoid rework caused by the pitch test after the servo shaft is fully assembled on board; 2. When the servo oil pipe is filled with oil in an upright state, the oil can flow into the pipe more smoothly, reducing the bubbles generated by the flow of oil. Bubbles are a potential problem in the hydraulic system. They may hinder the flow of oil, affect the performance of the system, and even cause system failure. Therefore, reducing the generation of bubbles is crucial to ensure the normal operation of the hydraulic system. Standing the servo oil pipe upright can more effectively utilize the gravity of the oil and make the oil flow into the pipe faster, which can not only reduce the time required for filling, but also improve the efficiency of filling; 3. The tightness test tooling made according to the measurement results can more accurately simulate the pressure conditions and sealing requirements in the actual working environment, which helps to improve the accuracy of the tightness test and more effectively detect potential leakage problems. The measurement data provides an important basis for the design of the tightness test tooling. Through precise measurement, a tooling structure that better meets actual needs can be designed to improve the applicability and reliability of the tooling. Accurate measurement and tooling design can reduce rework and scrap caused by size mismatch, thereby reducing production costs. At the same time, the design of the tooling can also consider the selection of materials and the optimization of the processing process to further reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the servo oil pipe internal test of the present invention; Figure 3 It is a structural schematic diagram of the oil pipe internal tightness test tool of the present invention; Figure 4 This is a top plan view of the oil pipe internal tightness test tool of the present invention; Figure 5 It is a structural schematic diagram of a bulkhead assembly 1 of the present invention; Figure 6 It is a structural schematic diagram of the present invention; Figure 7 It is a schematic diagram of the external test of the servo oil pipe of the present invention; Figure 8 It is a front cross-sectional view of the test chamber of the present invention; Fig. 9It is a structural schematic diagram of the shaft body and oil port tightness test tool of the present invention; Fig.10 For the present invention Fig. 9 Side view; Fig.11 This is a top plan view of the oil port tightness test tool of the present invention; Fig.12 It is a schematic diagram of the pitch oil port test of the forward turning of the present invention; Fig.13 It is a schematic diagram of the reverse pitch oil port test of the present invention; Fig.14 It is a structural schematic diagram of the oil port tightness test tooling of the present invention.
[0015] In the figure: 1. Inside the servo oil pipe; 2. Outside the servo oil pipe; 3. Servo shaft; 4. Bronze guide sleeve; 5. Positioning sleeve; 6. Forward pitch oil port; 7. Reverse pitch oil port; 8. Tightness test tool for inside the oil pipe; 801. Support platform; 802. Blind head assembly 1; 803. Blind head assembly 2; 8021. Sealing plate; 8022. Adjusting screw rod; 8023. Sealing bung; 9. Tightness test tool for outside the oil pipe; 901. Blind head assembly Three; 902, test chamber; 903, sealing ring; 10, oil port tightness test fixture; 1001, upper plate; 1002, lower plate; 1003, bulkhead assembly four; 1004, long screw; 11, rubber pad; 101, seal one; 102, seal two; 103, seal three; 104, seal four; 105, seal five; 106, seal six; 107, seal seven; 108, seal eight; 109, seal nine. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0017] Embodiment 1 See also Figure 1-Figure 14 The present invention provides a technical solution: a servo shaft tightness test method, comprising the following steps: S1. Measure the length and the apertures at both ends of the servo oil pipe 1, and make a corresponding tightness test tool. The tightness test tool is used to support the servo oil pipe 1 and seal both ends of the servo oil pipe 1. When making the tightness test tool, a connecting hole needs to be set for sealing test; S2. Place the servo oil pipe 1 on the tightness test fixture, fill the servo oil pipe 1 with oil, connect the hand pump hydraulic pipe after it is full, pump pressure 8MPa, check the tightness of the servo oil pipe 1. When filling the servo oil pipe 1, you need to stand up the servo oil pipe 1 first, and then lay the servo oil pipe 1 flat after filling. When the servo oil pipe 1 is filled with oil in the upright state, the oil can flow into the pipe more smoothly, reducing the bubbles generated by the flow of oil. Bubbles are a potential problem in the hydraulic system. They may hinder the flow of oil, affect the performance of the system, and even cause system failure. Therefore, reducing the generation of bubbles is very important to ensure the normal operation of the hydraulic system. Standing up the servo oil pipe 1 can more effectively Utilizing the gravity of the oil, the oil can flow into the pipe faster, which can not only reduce the time required for oil filling, but also improve the efficiency of oil filling. Laying the servo oil pipe 1 flat after filling with oil can better simulate the oil distribution under actual working conditions, which helps to more accurately evaluate the sealing performance of the servo oil pipe 1 in subsequent tightness inspections. If there are tiny leaks in the oil pipe, the oil distribution after laying flat can more easily reveal these problems. Filling the servo oil pipe 1 upright and laying it flat after filling can also prevent oil spillage during the oil filling process. The spilled oil may cause environmental pollution and even have a negative impact on the normal operation of the equipment. Therefore, this operation method helps to keep the working environment clean and safe. S3, after assembling the servo oil pipe inner 1 and the servo oil pipe outer 2, measure the journal and end flange structure of the servo oil pipe outer 2, and make a corresponding tightness test fixture, which is used to seal the end of the servo oil pipe inner 1 outside the servo oil pipe outer 2, and fill oil into the oil filling port on the servo oil pipe outer 2; S4. Install the tightness test fixture on the servo oil pipe outer 2, and then fill the servo oil pipe outer 2 with oil from the tightness test fixture. After it is full, connect the hand pump hydraulic pipe, pump pressure 8MPa, and check the tightness of the seal four 104. When filling the servo oil pipe outer 2 from the tightness test fixture, the servo oil pipe outer 2 needs to be laid flat. Laying the servo oil pipe outer 2 flat for filling can reduce the generation of bubbles, because bubbles are more likely to be retained on the top of the servo oil pipe outer 2 when the servo oil pipe outer 2 is tilted or vertical. At the same time, laying the servo oil pipe outer 2 flat also helps to reduce the oil leakage problem caused by the tilt of the servo oil pipe outer 2. These measures together improve the accuracy and reliability of the tightness test; S5. After assembling the servo oil pipe inner 1, servo oil pipe outer 2, servo shaft 3, bronze guide sleeve 4, and positioning sleeve 5, measure the shaft diameter of the servo shaft 3 and the apertures of the forward pitch oil port 6 and the reverse pitch oil port 7, and make the corresponding tightness test tooling. The tightness test tooling made according to the measurement results can more accurately simulate the pressure conditions and sealing requirements in the actual working environment, which helps to improve the accuracy of the tightness test, thereby more effectively detecting potential leakage problems. The measurement data provides an important basis for the design of the tightness test tooling. Through precise measurement, a tooling structure that better meets actual needs can be designed to improve the applicability and reliability of the tooling. Accurate measurement and tooling design can reduce rework and scrap caused by size mismatch, thereby reducing production costs. At the same time, the design of the tooling can also consider the selection of materials and the optimization of the processing process to further reduce costs. S6. Install the tightness test fixture on the servo shaft 3, and fill the reverse pitch oil port 7 with oil from the tightness test fixture. When it is full, connect the hand pump hydraulic pipe and pump the pressure to 8MPa. Check the tightness of seal 1 101, seal 5 105, seal 6 106, seal 7 107, seal 8 108, and seal 9 109. When filling the reverse pitch oil port 7 from the tightness test fixture, the servo shaft 3 needs to be laid flat, and the reverse pitch oil port 7 faces upward. Through the tightness test fixture, multiple sealing points (such as seal 1 101, seal 5 105, etc.) can be tested simultaneously or one by one, which improves the detection efficiency. The pump pressure of 8MPa can simulate the high pressure situation that may be encountered in the actual working environment, so as to more accurately evaluate the pressure bearing capacity and sealing effect of the seal. S7. Adjust the position of the sealing test fixture, and fill oil from the tightness test fixture into the forward car pitch oil port 6. After it is full, connect the hand pump hydraulic pipe, pump pressure 8MPa, and check the tightness of seal 2 102, seal 3 103, and seal 4 104. By specifically filling oil into the forward car pitch oil port 6, the tightness of the sealing structure related to the oil port (seal 2 102, seal 3 103, seal 4 104) can be centrally tested to ensure that the sealing performance of these key parts is accurately evaluated. Targeted testing can reduce unnecessary testing steps and time, making the testing process more efficient. At the same time, the 8MPa pump pressure can quickly and accurately reflect the pressure bearing capacity and sealing effect of the sealing structure; By sequentially performing tightness tests on the inside of the servo oil pipe inner 1, the sealing bronze guide sleeve 4 at the connection between the servo oil pipe inner 1 and the servo oil pipe outer 2, the seal two 102, the seal three 103, the seal four 104 connected to the forward pitch oil port 6, the seal one 101, the seal five 105, the seal six 106, the seal seven 107, the seal eight 108, and the seal nine 109 connected to the reverse pitch oil port 7, it is possible to ensure a comprehensive test of the tightness of the servo shaft and avoid rework caused by the ineffective pitch test after the servo shaft is fully assembled on board.
[0018] Embodiment 2 See also Figure 1-Figure 14 The present invention provides a technical solution: A servo shaft tightness test tool, including an oil pipe inner tightness test tool 8, an oil pipe outer tightness test tool 9, and an oil port tightness test tool 10; The oil pipe inner tightness test tool 8 is used for the tightness test inside the servo oil pipe 1, the oil pipe outer tightness test tool 9 is used for the tightness test between the servo oil pipe inner 1 and the servo oil pipe outer 2, and the oil port tightness test tool 10 is used for the tightness test inside the servo shaft 3; A servo shaft tightness test fixture, the oil pipe tightness test fixture 8 comprises a support platform 801, the length of the support platform 801 is greater than the length of the servo oil pipe 1, a bulkhead assembly 1 802 and a bulkhead assembly 2 803 are installed on the top of the support platform 801, the bulkhead assembly 1 802 and the bulkhead assembly 2 803 are respectively blocked at the left and right ends of the servo oil pipe 1, the bulkhead assembly 2 803 has the same structure as the bulkhead assembly 1 802, and a connecting channel is opened in the bulkhead assembly 2 803, the support platform 801 is set to support the servo oil pipe 1, the bulkhead assembly 1 802 and the bulkhead assembly 2 803 are set to block the two ends of the servo oil pipe 1 to ensure that the two ends of the servo oil pipe 1 are in a sealed state when the tightness test is performed on the servo oil pipe 1, and a connecting hole is opened on the bulkhead assembly 2 803 for connecting the hydraulic pipe of the hand pump; The oil pipe outer tightness test fixture 9 includes a blind head component three 901 and a test cavity 902. The blind head component three 901 is sealed on the left end of the servo oil pipe inner 1. The test cavity 902 is slidably sleeved on the servo oil pipe outer 2, and two sealing rings 903 are fixedly installed in the test cavity 902. The sealing rings 903 are sleeved on the servo oil pipe outer 2. The two sealing rings 903 are respectively located on both sides of the oil inlet on the servo oil pipe outer 2. The structure of the blind head component three 901 is the same as that of the support platform 801. The sealing ring 903 in the test cavity 902 is used to form a sealing area outside the oil inlet on the servo oil pipe outer 2, and then oil is poured into the servo oil pipe outer 2 through the through hole on the test cavity 902, and then the hand pump hydraulic pipe is connected to test the tightness of the seal four 104 at the connection between the servo oil pipe inner 1 and the servo oil pipe outer 2. The oil port tightness test fixture 10 includes an upper plate 1001 and a lower plate 1002, the upper plate 1001 and the lower plate 1002 are connected by a long screw rod 1004, a bulkhead assembly 1003 is fixedly installed on the outer wall of the upper plate 1001 facing the lower plate 1002, and a rubber pad 11 is fixedly installed on the outer wall of the lower plate 1002 facing the upper plate 1001. The structure of the bulkhead assembly 1003 is the same as that of the bulkhead assembly 1003. The upper plate 1001, the lower plate 1002, and the long screw rod 1004 form a ring sleeve on the servo shaft 3, wherein the bulkhead assembly 1004 is fixedly installed on the outer wall of the lower plate 1002 facing the upper plate 1001. 03 is used to connect the forward pitch oil port 6 or the reverse pitch oil port 7, and fill the oil from the forward pitch oil port 6 or the reverse pitch oil port 7 through the connecting hole on the long screw rod 1004. After filling, connect the hand pump hydraulic pipe to conduct a tightness test. When filling oil from the forward pitch oil port 6, the seal 2 102, the seal 3 103, and the seal 4 104 are tested for tightness. When filling oil from the reverse pitch oil port 7, the seal 1 101, the seal 5 105, the seal 6 106, the seal 7 107, the seal 8 108, and the seal 9 109 are tested for tightness. The bulkhead assembly 802 includes a sealing plate 8021, an adjusting screw 8022, and a sealing bulkhead 8023. The sealing bulkhead 8023 is fixedly mounted on the sealing plate 8021. The adjusting screw 8022 is fixedly connected to the sealing plate 8021, and a fastening nut is provided on the adjusting screw 8022.
[0019] Working principle: When in use, before assembly, first measure the length and the aperture of the servo oil pipe 1, then make the support platform 801, the bulkhead component 1 802, and the bulkhead component 2 803, use the bulkhead component 1 802 and the bulkhead component 2 803 to block the two ends of the servo oil pipe 1, stand the servo oil pipe 1 upright, and then fill the oil from the connecting hole in the bulkhead component 2 803. After filling, connect the hand pump hydraulic pipe, lay the servo oil pipe 1 flat, and then fix the bulkhead component 1 802 and the bulkhead component 2 803 on the support platform 801. At the pump pressure of 8MPa, check the tightness of the servo oil pipe 1, assemble the servo oil pipe 1 and the servo 1. Then measure the journal and end flange structure of the servo oil pipe outer 2, make the oil pipe outer tightness test fixture 9, plug the blind head assembly three 901 on the end of the servo oil pipe inner 1, and then put the test cavity 902 on the servo oil pipe outer 2, and use the two sealing rings 903 in the test cavity 902 to surround the oil inlet on the servo oil pipe outer 2, and pour oil into the servo oil pipe outer 2 from the connecting hole on the test cavity 902. After the filling is slow, connect the hand pump hydraulic pipe, put the servo oil pipe outer 2 flat, and measure the tightness of the connection between the servo oil pipe inner 1 and the servo oil pipe outer 2 at a pump pressure of 8MPa (whether the seal four 104 is installed in place), and then assemble the servo oil pipe. Inside 1, servo oil pipe outside 2, servo shaft 3, bronze guide sleeve 4, positioning sleeve 5. After the entire shaft body is installed, measure the shaft diameter of the servo shaft 3 and the apertures of the forward pitch oil port 6 and the reverse pitch oil port 7, make the oil port tightness test fixture 10, first assemble the upper plate 1001 and the lower plate 1002, put the two on the servo shaft 3, rotate the long screw rod 1004 to clamp the upper plate 1001 and the lower plate 1002 to the servo shaft 3, first align the blind head assembly four 1003 with the forward pitch oil port 6, and then fill the forward pitch oil port 6 with oil from the through hole on the blind head assembly four 1003. Fill it with oil, connect the hand pump hydraulic pipe, lay the shaft body flat, and press the pump. 8MPa, measure the internal tightness of the servo shaft 3 (check the tightness of seal two 102, seal three 103, and seal four 104), loosen the upper plate 1001 and the lower plate 1002, then rotate the upper plate 1001 and the lower plate 1002, align the blind head assembly four 1003 with the reverse pitch oil port 7, and then tighten the long screw 1004, fill the connecting hole on the blind head assembly four 1003 with oil, connect the hand-cranked pump hydraulic pipe after filling, lay the shaft flat, and measure the internal tightness of the servo shaft 3 at a pump pressure of 8MPa (check the tightness of seal one 101, seal five 105, seal six 106, seal seven 107, seal eight 108, and seal nine 109).
[0020] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.
Claims
1. A servo shaft tightness test method, characterized in that: The following steps are involved: S1. Measure the length and the hole diameters at both ends of the servo oil pipe (1) and make the corresponding tightness test tooling; S2. Place the servo oil pipe (1) on the tightness test fixture, fill the servo oil pipe (1) with oil, connect the hand pump hydraulic pipe after it is full, pump pressure 8MPa, and check the tightness of the servo oil pipe (1); S3. After assembling the servo oil pipe inner (1) and the servo oil pipe outer (2), measure the journal and end flange structure of the servo oil pipe outer (2) and make the corresponding tightness test tooling; S4. Install the tightness test fixture on the servo oil pipe (2), then pour oil into the servo oil pipe (2) from the tightness test fixture. After it is full, connect the hand pump hydraulic pipe and pump the pressure to 8MPa to check the tightness of seal four (104); S5. After assembling the servo oil pipe inner (1), servo oil pipe outer (2), servo shaft (3), bronze guide sleeve (4), and positioning sleeve (5), measure the shaft diameter of the servo shaft (3) and the apertures of the forward thread pitch oil port (6) and reverse thread pitch oil port (7), and make the corresponding tightness test fixture; S6. Install the tightness test fixture on the servo shaft (3), and pour oil into the reverse pitch oil port (7) from the tightness test fixture. When it is full, connect the hand pump hydraulic pipe and pump the pressure to 8MPa. Check the tightness of seal 1 (101), seal 5 (105), seal 6 (106), seal 7 (107), seal 8 (108), and seal 9 (109); S7. Adjust the position of the sealing test fixture, and pour oil into the forward car pitch oil port (6) from the tightness test fixture. When it is full, connect the hand pump hydraulic pipe and pump the pressure to 8MPa. Check the tightness of seal 2 (102), seal 3 (103), and seal 4 (104).
2. A servo shaft tightness test method according to claim 1, characterized in that: In the step S2, when filling the servo oil pipe (1), the servo oil pipe (1) needs to be erected first, and then the servo oil pipe (1) needs to be laid flat after the oil is filled.
3. A servo shaft tightness test method according to claim 1, characterized in that: In the step S4, when oil is poured into the servo oil pipe outer (2) from the tightness test fixture, the servo oil pipe outer (2) needs to be laid flat.
4. A servo shaft tightness test method according to claim 1, characterized in that: In step S6, when oil is poured from the tightness test fixture into the reverse pitch oil port (7), the servo shaft (3) needs to be laid flat, with the reverse pitch oil port (7) facing upwards.
5. A servo shaft tightness test method according to claim 1, characterized in that: In the step S7, when oil is poured from the tightness test fixture into the positive turning pitch oil port (6), the servo shaft (3) needs to be laid flat, with the positive turning pitch oil port (6) facing upwards.
6. A servo shaft tightness test tool, characterized in that: It includes an oil pipe inner tightness test tool (8), an oil pipe outer tightness test tool (9), and an oil port tightness test tool (10); The oil pipe inner tightness test tool (8) is used for a tightness test inside the servo oil pipe (1), the oil pipe outer tightness test tool (9) is used for a tightness test between the servo oil pipe inner (1) and the servo oil pipe outer (2), and the oil port tightness test tool (10) is used for a tightness test inside the servo shaft (3).
7. The servo shaft tightness test fixture according to claim 6, characterized in that: The oil pipe internal tightness test tool (8) comprises a support platform (801), the length of the support platform (801) is greater than the length of the servo oil pipe (1), and a bulkhead component 1 (802) and a bulkhead component 2 (803) are installed on the top of the support platform (801). The bulkhead component 1 (802) and the bulkhead component 2 (803) are respectively sealed at the left and right ends of the servo oil pipe (1), and the bulkhead component 2 (803) has the same structure as the bulkhead component 1 (802), and a connecting channel is opened in the bulkhead component 2 (803).
8. The servo shaft tightness test fixture according to claim 6, characterized in that: The oil pipe outer tightness test tool (9) comprises a third bulkhead component (901) and a test chamber (902). The third bulkhead component (901) is sealed on the left end of the servo oil pipe inner (1). The test chamber (902) is slidably sleeved on the servo oil pipe outer (2), and two sealing rings (903) are fixedly installed in the test chamber (902). The sealing rings (903) are sleeved on the servo oil pipe outer (servo oil pipe outer (2)). The two sealing rings (903) are respectively located on both sides of the oil inlet on the servo oil pipe outer (2). The structure of the third bulkhead component (901) is the same as that of the support platform (801).
9. The servo shaft tightness test fixture according to claim 6, characterized in that: The oil port tightness test fixture (10) comprises an upper plate (1001) and a lower plate (1002), wherein the upper plate (1001) and the lower plate (1002) are connected via a long screw rod (1004), a blind head assembly four (1003) is fixedly installed on the outer wall of the upper plate (1001) facing the lower plate (1002), and a rubber pad (11) is fixedly installed on the outer wall of the lower plate (1002) facing the upper plate (1001), and the structure of the blind head assembly four (1003) is the same as that of the blind head assembly two (803).
10. The servo shaft tightness test fixture according to claim 7, characterized in that: The first bulkhead assembly (802) comprises a sealing plate (8021), an adjusting screw (8022), and a sealing bulkhead (8023); the sealing bulkhead (8023) is fixedly mounted on the sealing plate (8021); the adjusting screw (8022) is fixedly connected to the sealing plate (8021); and a fastening nut is provided on the adjusting screw (8022).